[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/Kconfig b/ap/os/linux/linux-3.4.x/drivers/target/Kconfig
new file mode 100644
index 0000000..b28794b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/Kconfig
@@ -0,0 +1,36 @@
+
+menuconfig TARGET_CORE
+ tristate "Generic Target Core Mod (TCM) and ConfigFS Infrastructure"
+ depends on SCSI && BLOCK
+ select CONFIGFS_FS
+ default n
+ help
+ Say Y or M here to enable the TCM Storage Engine and ConfigFS enabled
+ control path for target_core_mod. This includes built-in TCM RAMDISK
+ subsystem logic for virtual LUN 0 access
+
+if TARGET_CORE
+
+config TCM_IBLOCK
+ tristate "TCM/IBLOCK Subsystem Plugin for Linux/BLOCK"
+ help
+ Say Y here to enable the TCM/IBLOCK subsystem plugin for non-buffered
+ access to Linux/Block devices using BIO
+
+config TCM_FILEIO
+ tristate "TCM/FILEIO Subsystem Plugin for Linux/VFS"
+ help
+ Say Y here to enable the TCM/FILEIO subsystem plugin for buffered
+ access to Linux/VFS struct file or struct block_device
+
+config TCM_PSCSI
+ tristate "TCM/pSCSI Subsystem Plugin for Linux/SCSI"
+ help
+ Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered
+ passthrough access to Linux/SCSI device
+
+source "drivers/target/loopback/Kconfig"
+source "drivers/target/tcm_fc/Kconfig"
+source "drivers/target/iscsi/Kconfig"
+
+endif
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/Makefile b/ap/os/linux/linux-3.4.x/drivers/target/Makefile
new file mode 100644
index 0000000..62e5405
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/Makefile
@@ -0,0 +1,27 @@
+
+target_core_mod-y := target_core_configfs.o \
+ target_core_device.o \
+ target_core_fabric_configfs.o \
+ target_core_fabric_lib.o \
+ target_core_hba.o \
+ target_core_pr.o \
+ target_core_alua.o \
+ target_core_tmr.o \
+ target_core_tpg.o \
+ target_core_transport.o \
+ target_core_cdb.o \
+ target_core_ua.o \
+ target_core_rd.o \
+ target_core_stat.o
+
+obj-$(CONFIG_TARGET_CORE) += target_core_mod.o
+
+# Subsystem modules
+obj-$(CONFIG_TCM_IBLOCK) += target_core_iblock.o
+obj-$(CONFIG_TCM_FILEIO) += target_core_file.o
+obj-$(CONFIG_TCM_PSCSI) += target_core_pscsi.o
+
+# Fabric modules
+obj-$(CONFIG_LOOPBACK_TARGET) += loopback/
+obj-$(CONFIG_TCM_FC) += tcm_fc/
+obj-$(CONFIG_ISCSI_TARGET) += iscsi/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Kconfig b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Kconfig
new file mode 100644
index 0000000..8345fb4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Kconfig
@@ -0,0 +1,9 @@
+config ISCSI_TARGET
+ tristate "Linux-iSCSI.org iSCSI Target Mode Stack"
+ depends on NET
+ select CRYPTO
+ select CRYPTO_CRC32C
+ select CRYPTO_CRC32C_INTEL if X86
+ help
+ Say M here to enable the ConfigFS enabled Linux-iSCSI.org iSCSI
+ Target Mode Stack.
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Makefile b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Makefile
new file mode 100644
index 0000000..5b9a2cf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/Makefile
@@ -0,0 +1,20 @@
+iscsi_target_mod-y += iscsi_target_parameters.o \
+ iscsi_target_seq_pdu_list.o \
+ iscsi_target_tq.o \
+ iscsi_target_auth.o \
+ iscsi_target_datain_values.o \
+ iscsi_target_device.o \
+ iscsi_target_erl0.o \
+ iscsi_target_erl1.o \
+ iscsi_target_erl2.o \
+ iscsi_target_login.o \
+ iscsi_target_nego.o \
+ iscsi_target_nodeattrib.o \
+ iscsi_target_tmr.o \
+ iscsi_target_tpg.o \
+ iscsi_target_util.o \
+ iscsi_target.o \
+ iscsi_target_configfs.o \
+ iscsi_target_stat.o
+
+obj-$(CONFIG_ISCSI_TARGET) += iscsi_target_mod.o
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.c
new file mode 100644
index 0000000..56d02e0
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.c
@@ -0,0 +1,4544 @@
+/*******************************************************************************
+ * This file contains main functions related to the iSCSI Target Core Driver.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/kthread.h>
+#include <linux/crypto.h>
+#include <linux/completion.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi_device.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_tq.h"
+#include "iscsi_target_configfs.h"
+#include "iscsi_target_datain_values.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target_login.h"
+#include "iscsi_target_tmr.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_stat.h"
+
+static LIST_HEAD(g_tiqn_list);
+static LIST_HEAD(g_np_list);
+static DEFINE_SPINLOCK(tiqn_lock);
+static DEFINE_MUTEX(np_lock);
+
+static struct idr tiqn_idr;
+struct idr sess_idr;
+struct mutex auth_id_lock;
+spinlock_t sess_idr_lock;
+
+struct iscsit_global *iscsit_global;
+
+struct kmem_cache *lio_cmd_cache;
+struct kmem_cache *lio_qr_cache;
+struct kmem_cache *lio_dr_cache;
+struct kmem_cache *lio_ooo_cache;
+struct kmem_cache *lio_r2t_cache;
+
+static int iscsit_handle_immediate_data(struct iscsi_cmd *,
+ unsigned char *buf, u32);
+static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
+
+struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf)
+{
+ struct iscsi_tiqn *tiqn = NULL;
+
+ spin_lock(&tiqn_lock);
+ list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) {
+ if (!strcmp(tiqn->tiqn, buf)) {
+
+ spin_lock(&tiqn->tiqn_state_lock);
+ if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) {
+ tiqn->tiqn_access_count++;
+ spin_unlock(&tiqn->tiqn_state_lock);
+ spin_unlock(&tiqn_lock);
+ return tiqn;
+ }
+ spin_unlock(&tiqn->tiqn_state_lock);
+ }
+ }
+ spin_unlock(&tiqn_lock);
+
+ return NULL;
+}
+
+static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn)
+{
+ spin_lock(&tiqn->tiqn_state_lock);
+ if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) {
+ tiqn->tiqn_state = TIQN_STATE_SHUTDOWN;
+ spin_unlock(&tiqn->tiqn_state_lock);
+ return 0;
+ }
+ spin_unlock(&tiqn->tiqn_state_lock);
+
+ return -1;
+}
+
+void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn)
+{
+ spin_lock(&tiqn->tiqn_state_lock);
+ tiqn->tiqn_access_count--;
+ spin_unlock(&tiqn->tiqn_state_lock);
+}
+
+/*
+ * Note that IQN formatting is expected to be done in userspace, and
+ * no explict IQN format checks are done here.
+ */
+struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf)
+{
+ struct iscsi_tiqn *tiqn = NULL;
+ int ret;
+
+ if (strlen(buf) >= ISCSI_IQN_LEN) {
+ pr_err("Target IQN exceeds %d bytes\n",
+ ISCSI_IQN_LEN);
+ return ERR_PTR(-EINVAL);
+ }
+
+ tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL);
+ if (!tiqn) {
+ pr_err("Unable to allocate struct iscsi_tiqn\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sprintf(tiqn->tiqn, "%s", buf);
+ INIT_LIST_HEAD(&tiqn->tiqn_list);
+ INIT_LIST_HEAD(&tiqn->tiqn_tpg_list);
+ spin_lock_init(&tiqn->tiqn_state_lock);
+ spin_lock_init(&tiqn->tiqn_tpg_lock);
+ spin_lock_init(&tiqn->sess_err_stats.lock);
+ spin_lock_init(&tiqn->login_stats.lock);
+ spin_lock_init(&tiqn->logout_stats.lock);
+
+ if (!idr_pre_get(&tiqn_idr, GFP_KERNEL)) {
+ pr_err("idr_pre_get() for tiqn_idr failed\n");
+ kfree(tiqn);
+ return ERR_PTR(-ENOMEM);
+ }
+ tiqn->tiqn_state = TIQN_STATE_ACTIVE;
+
+ spin_lock(&tiqn_lock);
+ ret = idr_get_new(&tiqn_idr, NULL, &tiqn->tiqn_index);
+ if (ret < 0) {
+ pr_err("idr_get_new() failed for tiqn->tiqn_index\n");
+ spin_unlock(&tiqn_lock);
+ kfree(tiqn);
+ return ERR_PTR(ret);
+ }
+ list_add_tail(&tiqn->tiqn_list, &g_tiqn_list);
+ spin_unlock(&tiqn_lock);
+
+ pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn);
+
+ return tiqn;
+
+}
+
+static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn)
+{
+ /*
+ * Wait for accesses to said struct iscsi_tiqn to end.
+ */
+ spin_lock(&tiqn->tiqn_state_lock);
+ while (tiqn->tiqn_access_count != 0) {
+ spin_unlock(&tiqn->tiqn_state_lock);
+ msleep(10);
+ spin_lock(&tiqn->tiqn_state_lock);
+ }
+ spin_unlock(&tiqn->tiqn_state_lock);
+}
+
+void iscsit_del_tiqn(struct iscsi_tiqn *tiqn)
+{
+ /*
+ * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
+ * while holding tiqn->tiqn_state_lock. This means that all subsequent
+ * attempts to access this struct iscsi_tiqn will fail from both transport
+ * fabric and control code paths.
+ */
+ if (iscsit_set_tiqn_shutdown(tiqn) < 0) {
+ pr_err("iscsit_set_tiqn_shutdown() failed\n");
+ return;
+ }
+
+ iscsit_wait_for_tiqn(tiqn);
+
+ spin_lock(&tiqn_lock);
+ list_del(&tiqn->tiqn_list);
+ idr_remove(&tiqn_idr, tiqn->tiqn_index);
+ spin_unlock(&tiqn_lock);
+
+ pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
+ tiqn->tiqn);
+ kfree(tiqn);
+}
+
+int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg)
+{
+ int ret;
+ /*
+ * Determine if the network portal is accepting storage traffic.
+ */
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return -1;
+ }
+ if (np->np_login_tpg) {
+ pr_err("np->np_login_tpg() is not NULL!\n");
+ spin_unlock_bh(&np->np_thread_lock);
+ return -1;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+ /*
+ * Determine if the portal group is accepting storage traffic.
+ */
+ spin_lock_bh(&tpg->tpg_state_lock);
+ if (tpg->tpg_state != TPG_STATE_ACTIVE) {
+ spin_unlock_bh(&tpg->tpg_state_lock);
+ return -1;
+ }
+ spin_unlock_bh(&tpg->tpg_state_lock);
+
+ /*
+ * Here we serialize access across the TIQN+TPG Tuple.
+ */
+ ret = mutex_lock_interruptible(&tpg->np_login_lock);
+ if ((ret != 0) || signal_pending(current))
+ return -1;
+
+ spin_lock_bh(&np->np_thread_lock);
+ np->np_login_tpg = tpg;
+ spin_unlock_bh(&np->np_thread_lock);
+
+ return 0;
+}
+
+int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg)
+{
+ struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
+
+ spin_lock_bh(&np->np_thread_lock);
+ np->np_login_tpg = NULL;
+ spin_unlock_bh(&np->np_thread_lock);
+
+ mutex_unlock(&tpg->np_login_lock);
+
+ if (tiqn)
+ iscsit_put_tiqn_for_login(tiqn);
+
+ return 0;
+}
+
+/*
+ * Called with mutex np_lock held
+ */
+static struct iscsi_np *iscsit_get_np(
+ struct __kernel_sockaddr_storage *sockaddr,
+ int network_transport)
+{
+ struct sockaddr_in *sock_in, *sock_in_e;
+ struct sockaddr_in6 *sock_in6, *sock_in6_e;
+ struct iscsi_np *np;
+ int ip_match = 0;
+ u16 port;
+
+ list_for_each_entry(np, &g_np_list, np_list) {
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
+ spin_unlock_bh(&np->np_thread_lock);
+ continue;
+ }
+
+ if (sockaddr->ss_family == AF_INET6) {
+ sock_in6 = (struct sockaddr_in6 *)sockaddr;
+ sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr;
+
+ if (!memcmp(&sock_in6->sin6_addr.in6_u,
+ &sock_in6_e->sin6_addr.in6_u,
+ sizeof(struct in6_addr)))
+ ip_match = 1;
+
+ port = ntohs(sock_in6->sin6_port);
+ } else {
+ sock_in = (struct sockaddr_in *)sockaddr;
+ sock_in_e = (struct sockaddr_in *)&np->np_sockaddr;
+
+ if (sock_in->sin_addr.s_addr ==
+ sock_in_e->sin_addr.s_addr)
+ ip_match = 1;
+
+ port = ntohs(sock_in->sin_port);
+ }
+
+ if ((ip_match == 1) && (np->np_port == port) &&
+ (np->np_network_transport == network_transport)) {
+ /*
+ * Increment the np_exports reference count now to
+ * prevent iscsit_del_np() below from being called
+ * while iscsi_tpg_add_network_portal() is called.
+ */
+ np->np_exports++;
+ spin_unlock_bh(&np->np_thread_lock);
+ return np;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+ }
+
+ return NULL;
+}
+
+struct iscsi_np *iscsit_add_np(
+ struct __kernel_sockaddr_storage *sockaddr,
+ char *ip_str,
+ int network_transport)
+{
+ struct sockaddr_in *sock_in;
+ struct sockaddr_in6 *sock_in6;
+ struct iscsi_np *np;
+ int ret;
+
+ mutex_lock(&np_lock);
+
+ /*
+ * Locate the existing struct iscsi_np if already active..
+ */
+ np = iscsit_get_np(sockaddr, network_transport);
+ if (np) {
+ mutex_unlock(&np_lock);
+ return np;
+ }
+
+ np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL);
+ if (!np) {
+ pr_err("Unable to allocate memory for struct iscsi_np\n");
+ mutex_unlock(&np_lock);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ np->np_flags |= NPF_IP_NETWORK;
+ if (sockaddr->ss_family == AF_INET6) {
+ sock_in6 = (struct sockaddr_in6 *)sockaddr;
+ snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str);
+ np->np_port = ntohs(sock_in6->sin6_port);
+ } else {
+ sock_in = (struct sockaddr_in *)sockaddr;
+ sprintf(np->np_ip, "%s", ip_str);
+ np->np_port = ntohs(sock_in->sin_port);
+ }
+
+ np->np_network_transport = network_transport;
+ spin_lock_init(&np->np_thread_lock);
+ init_completion(&np->np_restart_comp);
+ INIT_LIST_HEAD(&np->np_list);
+
+ ret = iscsi_target_setup_login_socket(np, sockaddr);
+ if (ret != 0) {
+ kfree(np);
+ mutex_unlock(&np_lock);
+ return ERR_PTR(ret);
+ }
+
+ np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np");
+ if (IS_ERR(np->np_thread)) {
+ pr_err("Unable to create kthread: iscsi_np\n");
+ ret = PTR_ERR(np->np_thread);
+ kfree(np);
+ mutex_unlock(&np_lock);
+ return ERR_PTR(ret);
+ }
+ /*
+ * Increment the np_exports reference count now to prevent
+ * iscsit_del_np() below from being run while a new call to
+ * iscsi_tpg_add_network_portal() for a matching iscsi_np is
+ * active. We don't need to hold np->np_thread_lock at this
+ * point because iscsi_np has not been added to g_np_list yet.
+ */
+ np->np_exports = 1;
+ np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
+
+ list_add_tail(&np->np_list, &g_np_list);
+ mutex_unlock(&np_lock);
+
+ pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
+ np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ?
+ "TCP" : "SCTP");
+
+ return np;
+}
+
+int iscsit_reset_np_thread(
+ struct iscsi_np *np,
+ struct iscsi_tpg_np *tpg_np,
+ struct iscsi_portal_group *tpg)
+{
+ spin_lock_bh(&np->np_thread_lock);
+ if (tpg && tpg_np) {
+ /*
+ * The reset operation need only be performed when the
+ * passed struct iscsi_portal_group has a login in progress
+ * to one of the network portals.
+ */
+ if (tpg_np->tpg_np->np_login_tpg != tpg) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return 0;
+ }
+ }
+ if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return 0;
+ }
+ np->np_thread_state = ISCSI_NP_THREAD_RESET;
+
+ if (np->np_thread) {
+ spin_unlock_bh(&np->np_thread_lock);
+ send_sig(SIGINT, np->np_thread, 1);
+ wait_for_completion(&np->np_restart_comp);
+ spin_lock_bh(&np->np_thread_lock);
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+
+ return 0;
+}
+
+int iscsit_del_np_comm(struct iscsi_np *np)
+{
+ if (np->np_socket)
+ sock_release(np->np_socket);
+ return 0;
+}
+
+int iscsit_del_np(struct iscsi_np *np)
+{
+ spin_lock_bh(&np->np_thread_lock);
+ np->np_exports--;
+ if (np->np_exports) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return 0;
+ }
+ np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN;
+ spin_unlock_bh(&np->np_thread_lock);
+
+ if (np->np_thread) {
+ /*
+ * We need to send the signal to wakeup Linux/Net
+ * which may be sleeping in sock_accept()..
+ */
+ send_sig(SIGINT, np->np_thread, 1);
+ kthread_stop(np->np_thread);
+ }
+ iscsit_del_np_comm(np);
+
+ mutex_lock(&np_lock);
+ list_del(&np->np_list);
+ mutex_unlock(&np_lock);
+
+ pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
+ np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ?
+ "TCP" : "SCTP");
+
+ kfree(np);
+ return 0;
+}
+
+static int __init iscsi_target_init_module(void)
+{
+ int ret = 0;
+
+ pr_debug("iSCSI-Target "ISCSIT_VERSION"\n");
+
+ iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL);
+ if (!iscsit_global) {
+ pr_err("Unable to allocate memory for iscsit_global\n");
+ return -1;
+ }
+ mutex_init(&auth_id_lock);
+ spin_lock_init(&sess_idr_lock);
+ idr_init(&tiqn_idr);
+ idr_init(&sess_idr);
+
+ ret = iscsi_target_register_configfs();
+ if (ret < 0)
+ goto out;
+
+ ret = iscsi_thread_set_init();
+ if (ret < 0)
+ goto configfs_out;
+
+ if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) !=
+ TARGET_THREAD_SET_COUNT) {
+ pr_err("iscsi_allocate_thread_sets() returned"
+ " unexpected value!\n");
+ goto ts_out1;
+ }
+
+ lio_cmd_cache = kmem_cache_create("lio_cmd_cache",
+ sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd),
+ 0, NULL);
+ if (!lio_cmd_cache) {
+ pr_err("Unable to kmem_cache_create() for"
+ " lio_cmd_cache\n");
+ goto ts_out2;
+ }
+
+ lio_qr_cache = kmem_cache_create("lio_qr_cache",
+ sizeof(struct iscsi_queue_req),
+ __alignof__(struct iscsi_queue_req), 0, NULL);
+ if (!lio_qr_cache) {
+ pr_err("nable to kmem_cache_create() for"
+ " lio_qr_cache\n");
+ goto cmd_out;
+ }
+
+ lio_dr_cache = kmem_cache_create("lio_dr_cache",
+ sizeof(struct iscsi_datain_req),
+ __alignof__(struct iscsi_datain_req), 0, NULL);
+ if (!lio_dr_cache) {
+ pr_err("Unable to kmem_cache_create() for"
+ " lio_dr_cache\n");
+ goto qr_out;
+ }
+
+ lio_ooo_cache = kmem_cache_create("lio_ooo_cache",
+ sizeof(struct iscsi_ooo_cmdsn),
+ __alignof__(struct iscsi_ooo_cmdsn), 0, NULL);
+ if (!lio_ooo_cache) {
+ pr_err("Unable to kmem_cache_create() for"
+ " lio_ooo_cache\n");
+ goto dr_out;
+ }
+
+ lio_r2t_cache = kmem_cache_create("lio_r2t_cache",
+ sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t),
+ 0, NULL);
+ if (!lio_r2t_cache) {
+ pr_err("Unable to kmem_cache_create() for"
+ " lio_r2t_cache\n");
+ goto ooo_out;
+ }
+
+ if (iscsit_load_discovery_tpg() < 0)
+ goto r2t_out;
+
+ return ret;
+r2t_out:
+ kmem_cache_destroy(lio_r2t_cache);
+ooo_out:
+ kmem_cache_destroy(lio_ooo_cache);
+dr_out:
+ kmem_cache_destroy(lio_dr_cache);
+qr_out:
+ kmem_cache_destroy(lio_qr_cache);
+cmd_out:
+ kmem_cache_destroy(lio_cmd_cache);
+ts_out2:
+ iscsi_deallocate_thread_sets();
+ts_out1:
+ iscsi_thread_set_free();
+configfs_out:
+ iscsi_target_deregister_configfs();
+out:
+ kfree(iscsit_global);
+ return -ENOMEM;
+}
+
+static void __exit iscsi_target_cleanup_module(void)
+{
+ iscsi_deallocate_thread_sets();
+ iscsi_thread_set_free();
+ iscsit_release_discovery_tpg();
+ kmem_cache_destroy(lio_cmd_cache);
+ kmem_cache_destroy(lio_qr_cache);
+ kmem_cache_destroy(lio_dr_cache);
+ kmem_cache_destroy(lio_ooo_cache);
+ kmem_cache_destroy(lio_r2t_cache);
+
+ iscsi_target_deregister_configfs();
+
+ kfree(iscsit_global);
+}
+
+int iscsit_add_reject(
+ u8 reason,
+ int fail_conn,
+ unsigned char *buf,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_cmd *cmd;
+ struct iscsi_reject *hdr;
+ int ret;
+
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return -1;
+
+ cmd->iscsi_opcode = ISCSI_OP_REJECT;
+ if (fail_conn)
+ cmd->cmd_flags |= ICF_REJECT_FAIL_CONN;
+
+ hdr = (struct iscsi_reject *) cmd->pdu;
+ hdr->reason = reason;
+
+ cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
+ if (!cmd->buf_ptr) {
+ pr_err("Unable to allocate memory for cmd->buf_ptr\n");
+ iscsit_release_cmd(cmd);
+ return -1;
+ }
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ cmd->i_state = ISTATE_SEND_REJECT;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ ret = wait_for_completion_interruptible(&cmd->reject_comp);
+ if (ret != 0)
+ return -1;
+
+ return (!fail_conn) ? 0 : -1;
+}
+
+int iscsit_add_reject_from_cmd(
+ u8 reason,
+ int fail_conn,
+ int add_to_conn,
+ unsigned char *buf,
+ struct iscsi_cmd *cmd)
+{
+ struct iscsi_conn *conn;
+ struct iscsi_reject *hdr;
+ int ret;
+
+ if (!cmd->conn) {
+ pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
+ cmd->init_task_tag);
+ return -1;
+ }
+ conn = cmd->conn;
+
+ cmd->iscsi_opcode = ISCSI_OP_REJECT;
+ if (fail_conn)
+ cmd->cmd_flags |= ICF_REJECT_FAIL_CONN;
+
+ hdr = (struct iscsi_reject *) cmd->pdu;
+ hdr->reason = reason;
+
+ cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
+ if (!cmd->buf_ptr) {
+ pr_err("Unable to allocate memory for cmd->buf_ptr\n");
+ iscsit_release_cmd(cmd);
+ return -1;
+ }
+
+ if (add_to_conn) {
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+ }
+
+ cmd->i_state = ISTATE_SEND_REJECT;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ ret = wait_for_completion_interruptible(&cmd->reject_comp);
+ if (ret != 0)
+ return -1;
+
+ return (!fail_conn) ? 0 : -1;
+}
+
+/*
+ * Map some portion of the allocated scatterlist to an iovec, suitable for
+ * kernel sockets to copy data in/out. This handles both pages and slab-allocated
+ * buffers, since we have been tricky and mapped t_mem_sg to the buffer in
+ * either case (see iscsit_alloc_buffs)
+ */
+static int iscsit_map_iovec(
+ struct iscsi_cmd *cmd,
+ struct kvec *iov,
+ u32 data_offset,
+ u32 data_length)
+{
+ u32 i = 0;
+ struct scatterlist *sg;
+ unsigned int page_off;
+
+ /*
+ * We have a private mapping of the allocated pages in t_mem_sg.
+ * At this point, we also know each contains a page.
+ */
+ sg = &cmd->t_mem_sg[data_offset / PAGE_SIZE];
+ page_off = (data_offset % PAGE_SIZE);
+
+ cmd->first_data_sg = sg;
+ cmd->first_data_sg_off = page_off;
+
+ while (data_length) {
+ u32 cur_len = min_t(u32, data_length, sg->length - page_off);
+
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off;
+ iov[i].iov_len = cur_len;
+
+ data_length -= cur_len;
+ page_off = 0;
+ sg = sg_next(sg);
+ i++;
+ }
+
+ cmd->kmapped_nents = i;
+
+ return i;
+}
+
+static void iscsit_unmap_iovec(struct iscsi_cmd *cmd)
+{
+ u32 i;
+ struct scatterlist *sg;
+
+ sg = cmd->first_data_sg;
+
+ for (i = 0; i < cmd->kmapped_nents; i++)
+ kunmap(sg_page(&sg[i]));
+}
+
+static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn)
+{
+ struct iscsi_cmd *cmd;
+
+ conn->exp_statsn = exp_statsn;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ spin_lock(&cmd->istate_lock);
+ if ((cmd->i_state == ISTATE_SENT_STATUS) &&
+ (cmd->stat_sn < exp_statsn)) {
+ cmd->i_state = ISTATE_REMOVE;
+ spin_unlock(&cmd->istate_lock);
+ iscsit_add_cmd_to_immediate_queue(cmd, conn,
+ cmd->i_state);
+ continue;
+ }
+ spin_unlock(&cmd->istate_lock);
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+}
+
+static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd)
+{
+ u32 iov_count = (cmd->se_cmd.t_data_nents == 0) ? 1 :
+ cmd->se_cmd.t_data_nents;
+
+ iov_count += ISCSI_IOV_DATA_BUFFER;
+
+ cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL);
+ if (!cmd->iov_data) {
+ pr_err("Unable to allocate cmd->iov_data\n");
+ return -ENOMEM;
+ }
+
+ cmd->orig_iov_data_count = iov_count;
+ return 0;
+}
+
+static int iscsit_alloc_buffs(struct iscsi_cmd *cmd)
+{
+ struct scatterlist *sgl;
+ u32 length = cmd->se_cmd.data_length;
+ int nents = DIV_ROUND_UP(length, PAGE_SIZE);
+ int i = 0, j = 0, ret;
+ /*
+ * If no SCSI payload is present, allocate the default iovecs used for
+ * iSCSI PDU Header
+ */
+ if (!length)
+ return iscsit_allocate_iovecs(cmd);
+
+ sgl = kzalloc(sizeof(*sgl) * nents, GFP_KERNEL);
+ if (!sgl)
+ return -ENOMEM;
+
+ sg_init_table(sgl, nents);
+
+ while (length) {
+ int buf_size = min_t(int, length, PAGE_SIZE);
+ struct page *page;
+
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page)
+ goto page_alloc_failed;
+
+ sg_set_page(&sgl[i], page, buf_size, 0);
+
+ length -= buf_size;
+ i++;
+ }
+
+ cmd->t_mem_sg = sgl;
+ cmd->t_mem_sg_nents = nents;
+
+ /* BIDI ops not supported */
+
+ /* Tell the core about our preallocated memory */
+ transport_generic_map_mem_to_cmd(&cmd->se_cmd, sgl, nents, NULL, 0);
+ /*
+ * Allocate iovecs for SCSI payload after transport_generic_map_mem_to_cmd
+ * so that cmd->se_cmd.t_tasks_se_num has been set.
+ */
+ ret = iscsit_allocate_iovecs(cmd);
+ if (ret < 0)
+ return -ENOMEM;
+
+ return 0;
+
+page_alloc_failed:
+ while (j < i)
+ __free_page(sg_page(&sgl[j++]));
+
+ kfree(sgl);
+ return -ENOMEM;
+}
+
+static int iscsit_handle_scsi_cmd(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ int data_direction, cmdsn_ret = 0, immed_ret, ret, transport_ret;
+ int dump_immediate_data = 0, send_check_condition = 0, payload_length;
+ struct iscsi_cmd *cmd = NULL;
+ struct iscsi_scsi_req *hdr;
+
+ spin_lock_bh(&conn->sess->session_stats_lock);
+ conn->sess->cmd_pdus++;
+ if (conn->sess->se_sess->se_node_acl) {
+ spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ conn->sess->se_sess->se_node_acl->num_cmds++;
+ spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ }
+ spin_unlock_bh(&conn->sess->session_stats_lock);
+
+ hdr = (struct iscsi_scsi_req *) buf;
+ payload_length = ntoh24(hdr->dlength);
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->data_length = be32_to_cpu(hdr->data_length);
+ hdr->cmdsn = be32_to_cpu(hdr->cmdsn);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+
+ /* FIXME; Add checks for AdditionalHeaderSegment */
+
+ if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) &&
+ !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) {
+ pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
+ " not set. Bad iSCSI Initiator.\n");
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+
+ if (((hdr->flags & ISCSI_FLAG_CMD_READ) ||
+ (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) {
+ /*
+ * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
+ * that adds support for RESERVE/RELEASE. There is a bug
+ * add with this new functionality that sets R/W bits when
+ * neither CDB carries any READ or WRITE datapayloads.
+ */
+ if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) {
+ hdr->flags &= ~ISCSI_FLAG_CMD_READ;
+ hdr->flags &= ~ISCSI_FLAG_CMD_WRITE;
+ goto done;
+ }
+
+ pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
+ " set when Expected Data Transfer Length is 0 for"
+ " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]);
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+done:
+
+ if (!(hdr->flags & ISCSI_FLAG_CMD_READ) &&
+ !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) {
+ pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
+ " MUST be set if Expected Data Transfer Length is not 0."
+ " Bad iSCSI Initiator\n");
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+
+ if ((hdr->flags & ISCSI_FLAG_CMD_READ) &&
+ (hdr->flags & ISCSI_FLAG_CMD_WRITE)) {
+ pr_err("Bidirectional operations not supported!\n");
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+
+ if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
+ pr_err("Illegally set Immediate Bit in iSCSI Initiator"
+ " Scsi Command PDU.\n");
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+
+ if (payload_length && !conn->sess->sess_ops->ImmediateData) {
+ pr_err("ImmediateData=No but DataSegmentLength=%u,"
+ " protocol error.\n", payload_length);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ if ((hdr->data_length == payload_length) &&
+ (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) {
+ pr_err("Expected Data Transfer Length and Length of"
+ " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
+ " bit is not set protocol error\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ if (payload_length > hdr->data_length) {
+ pr_err("DataSegmentLength: %u is greater than"
+ " EDTL: %u, protocol error.\n", payload_length,
+ hdr->data_length);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) {
+ pr_err("DataSegmentLength: %u is greater than"
+ " MaxRecvDataSegmentLength: %u, protocol error.\n",
+ payload_length, conn->conn_ops->MaxRecvDataSegmentLength);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ if (payload_length > conn->sess->sess_ops->FirstBurstLength) {
+ pr_err("DataSegmentLength: %u is greater than"
+ " FirstBurstLength: %u, protocol error.\n",
+ payload_length, conn->sess->sess_ops->FirstBurstLength);
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
+ buf, conn);
+ }
+
+ data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE :
+ (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE :
+ DMA_NONE;
+
+ cmd = iscsit_allocate_se_cmd(conn, hdr->data_length, data_direction,
+ (hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK));
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1,
+ buf, conn);
+
+ pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
+ " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
+ hdr->cmdsn, hdr->data_length, payload_length, conn->cid);
+
+ cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD;
+ cmd->i_state = ISTATE_NEW_CMD;
+ cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
+ cmd->immediate_data = (payload_length) ? 1 : 0;
+ cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) &&
+ (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0);
+ if (cmd->unsolicited_data)
+ cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA;
+
+ conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
+ if (hdr->flags & ISCSI_FLAG_CMD_READ) {
+ spin_lock_bh(&conn->sess->ttt_lock);
+ cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
+ if (cmd->targ_xfer_tag == 0xFFFFFFFF)
+ cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
+ spin_unlock_bh(&conn->sess->ttt_lock);
+ } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE)
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ cmd->cmd_sn = hdr->cmdsn;
+ cmd->exp_stat_sn = hdr->exp_statsn;
+ cmd->first_burst_len = payload_length;
+
+ if (cmd->data_direction == DMA_FROM_DEVICE) {
+ struct iscsi_datain_req *dr;
+
+ dr = iscsit_allocate_datain_req();
+ if (!dr)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 1, buf, cmd);
+
+ iscsit_attach_datain_req(cmd, dr);
+ }
+
+ /*
+ * The CDB is going to an se_device_t.
+ */
+ ret = transport_lookup_cmd_lun(&cmd->se_cmd,
+ scsilun_to_int(&hdr->lun));
+ if (ret < 0) {
+ if (cmd->se_cmd.scsi_sense_reason == TCM_NON_EXISTENT_LUN) {
+ pr_debug("Responding to non-acl'ed,"
+ " non-existent or non-exported iSCSI LUN:"
+ " 0x%016Lx\n", get_unaligned_le64(&hdr->lun));
+ }
+ send_check_condition = 1;
+ goto attach_cmd;
+ }
+ /*
+ * The Initiator Node has access to the LUN (the addressing method
+ * is handled inside of iscsit_get_lun_for_cmd()). Now it's time to
+ * allocate 1->N transport tasks (depending on sector count and
+ * maximum request size the physical HBA(s) can handle.
+ */
+ transport_ret = transport_generic_allocate_tasks(&cmd->se_cmd, hdr->cdb);
+ if (transport_ret == -ENOMEM) {
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 1, buf, cmd);
+ } else if (transport_ret < 0) {
+ /*
+ * Unsupported SAM Opcode. CHECK_CONDITION will be sent
+ * in iscsit_execute_cmd() during the CmdSN OOO Execution
+ * Mechinism.
+ */
+ send_check_condition = 1;
+ } else {
+ cmd->data_length = cmd->se_cmd.data_length;
+
+ if (iscsit_decide_list_to_build(cmd, payload_length) < 0)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 1, buf, cmd);
+ }
+
+attach_cmd:
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+ /*
+ * Check if we need to delay processing because of ALUA
+ * Active/NonOptimized primary access state..
+ */
+ core_alua_check_nonop_delay(&cmd->se_cmd);
+ /*
+ * Allocate and setup SGL used with transport_generic_map_mem_to_cmd().
+ * also call iscsit_allocate_iovecs()
+ */
+ ret = iscsit_alloc_buffs(cmd);
+ if (ret < 0)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 0, buf, cmd);
+ /*
+ * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
+ * the Immediate Bit is not set, and no Immediate
+ * Data is attached.
+ *
+ * A PDU/CmdSN carrying Immediate Data can only
+ * be processed after the DataCRC has passed.
+ * If the DataCRC fails, the CmdSN MUST NOT
+ * be acknowledged. (See below)
+ */
+ if (!cmd->immediate_data) {
+ cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
+ return 0;
+ else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+
+ iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
+
+ /*
+ * If no Immediate Data is attached, it's OK to return now.
+ */
+ if (!cmd->immediate_data) {
+ if (send_check_condition)
+ return 0;
+
+ if (cmd->unsolicited_data) {
+ iscsit_set_dataout_sequence_values(cmd);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ iscsit_start_dataout_timer(cmd, cmd->conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ }
+
+ return 0;
+ }
+
+ /*
+ * Early CHECK_CONDITIONs never make it to the transport processing
+ * thread. They are processed in CmdSN order by
+ * iscsit_check_received_cmdsn() below.
+ */
+ if (send_check_condition) {
+ immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
+ dump_immediate_data = 1;
+ goto after_immediate_data;
+ }
+ /*
+ * Call directly into transport_generic_new_cmd() to perform
+ * the backend memory allocation.
+ */
+ ret = transport_generic_new_cmd(&cmd->se_cmd);
+ if (ret < 0) {
+ immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
+ dump_immediate_data = 1;
+ goto after_immediate_data;
+ }
+
+ immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length);
+after_immediate_data:
+ if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) {
+ /*
+ * A PDU/CmdSN carrying Immediate Data passed
+ * DataCRC, check against ExpCmdSN/MaxCmdSN if
+ * Immediate Bit is not set.
+ */
+ cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ /*
+ * Special case for Unsupported SAM WRITE Opcodes
+ * and ImmediateData=Yes.
+ */
+ if (dump_immediate_data) {
+ if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ return -1;
+ } else if (cmd->unsolicited_data) {
+ iscsit_set_dataout_sequence_values(cmd);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ iscsit_start_dataout_timer(cmd, cmd->conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ }
+
+ if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+
+ } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) {
+ /*
+ * Immediate Data failed DataCRC and ERL>=1,
+ * silently drop this PDU and let the initiator
+ * plug the CmdSN gap.
+ *
+ * FIXME: Send Unsolicited NOPIN with reserved
+ * TTT here to help the initiator figure out
+ * the missing CmdSN, although they should be
+ * intelligent enough to determine the missing
+ * CmdSN and issue a retry to plug the sequence.
+ */
+ cmd->i_state = ISTATE_REMOVE;
+ iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
+ } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
+ return -1;
+
+ return 0;
+}
+
+static u32 iscsit_do_crypto_hash_sg(
+ struct hash_desc *hash,
+ struct iscsi_cmd *cmd,
+ u32 data_offset,
+ u32 data_length,
+ u32 padding,
+ u8 *pad_bytes)
+{
+ u32 data_crc;
+ u32 i;
+ struct scatterlist *sg;
+ unsigned int page_off;
+
+ crypto_hash_init(hash);
+
+ sg = cmd->first_data_sg;
+ page_off = cmd->first_data_sg_off;
+
+ i = 0;
+ while (data_length) {
+ u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off));
+
+ crypto_hash_update(hash, &sg[i], cur_len);
+
+ data_length -= cur_len;
+ page_off = 0;
+ i++;
+ }
+
+ if (padding) {
+ struct scatterlist pad_sg;
+
+ sg_init_one(&pad_sg, pad_bytes, padding);
+ crypto_hash_update(hash, &pad_sg, padding);
+ }
+ crypto_hash_final(hash, (u8 *) &data_crc);
+
+ return data_crc;
+}
+
+static void iscsit_do_crypto_hash_buf(
+ struct hash_desc *hash,
+ unsigned char *buf,
+ u32 payload_length,
+ u32 padding,
+ u8 *pad_bytes,
+ u8 *data_crc)
+{
+ struct scatterlist sg;
+
+ crypto_hash_init(hash);
+
+ sg_init_one(&sg, buf, payload_length);
+ crypto_hash_update(hash, &sg, payload_length);
+
+ if (padding) {
+ sg_init_one(&sg, pad_bytes, padding);
+ crypto_hash_update(hash, &sg, padding);
+ }
+ crypto_hash_final(hash, data_crc);
+}
+
+static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
+{
+ int iov_ret, ooo_cmdsn = 0, ret;
+ u8 data_crc_failed = 0;
+ u32 checksum, iov_count = 0, padding = 0, rx_got = 0;
+ u32 rx_size = 0, payload_length;
+ struct iscsi_cmd *cmd = NULL;
+ struct se_cmd *se_cmd;
+ struct iscsi_data *hdr;
+ struct kvec *iov;
+ unsigned long flags;
+
+ hdr = (struct iscsi_data *) buf;
+ payload_length = ntoh24(hdr->dlength);
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->ttt = be32_to_cpu(hdr->ttt);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+ hdr->datasn = be32_to_cpu(hdr->datasn);
+ hdr->offset = be32_to_cpu(hdr->offset);
+
+ if (!payload_length) {
+ pr_err("DataOUT payload is ZERO, protocol error.\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ /* iSCSI write */
+ spin_lock_bh(&conn->sess->session_stats_lock);
+ conn->sess->rx_data_octets += payload_length;
+ if (conn->sess->se_sess->se_node_acl) {
+ spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ conn->sess->se_sess->se_node_acl->write_bytes += payload_length;
+ spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ }
+ spin_unlock_bh(&conn->sess->session_stats_lock);
+
+ if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) {
+ pr_err("DataSegmentLength: %u is greater than"
+ " MaxRecvDataSegmentLength: %u\n", payload_length,
+ conn->conn_ops->MaxRecvDataSegmentLength);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt,
+ payload_length);
+ if (!cmd)
+ return 0;
+
+ pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
+ " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
+ hdr->itt, hdr->ttt, hdr->datasn, hdr->offset,
+ payload_length, conn->cid);
+
+ if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
+ pr_err("Command ITT: 0x%08x received DataOUT after"
+ " last DataOUT received, dumping payload\n",
+ cmd->init_task_tag);
+ return iscsit_dump_data_payload(conn, payload_length, 1);
+ }
+
+ if (cmd->data_direction != DMA_TO_DEVICE) {
+ pr_err("Command ITT: 0x%08x received DataOUT for a"
+ " NON-WRITE command.\n", cmd->init_task_tag);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+ se_cmd = &cmd->se_cmd;
+ iscsit_mod_dataout_timer(cmd);
+
+ if ((hdr->offset + payload_length) > cmd->data_length) {
+ pr_err("DataOut Offset: %u, Length %u greater than"
+ " iSCSI Command EDTL %u, protocol error.\n",
+ hdr->offset, payload_length, cmd->data_length);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 0, buf, cmd);
+ }
+
+ if (cmd->unsolicited_data) {
+ int dump_unsolicited_data = 0;
+
+ if (conn->sess->sess_ops->InitialR2T) {
+ pr_err("Received unexpected unsolicited data"
+ " while InitialR2T=Yes, protocol error.\n");
+ transport_send_check_condition_and_sense(&cmd->se_cmd,
+ TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
+ return -1;
+ }
+ /*
+ * Special case for dealing with Unsolicited DataOUT
+ * and Unsupported SAM WRITE Opcodes and SE resource allocation
+ * failures;
+ */
+
+ /* Something's amiss if we're not in WRITE_PENDING state... */
+ spin_lock_irqsave(&se_cmd->t_state_lock, flags);
+ WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING);
+ spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
+
+ spin_lock_irqsave(&se_cmd->t_state_lock, flags);
+ if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) ||
+ (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION))
+ dump_unsolicited_data = 1;
+ spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
+
+ if (dump_unsolicited_data) {
+ /*
+ * Check if a delayed TASK_ABORTED status needs to
+ * be sent now if the ISCSI_FLAG_CMD_FINAL has been
+ * received with the unsolicitied data out.
+ */
+ if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
+ iscsit_stop_dataout_timer(cmd);
+
+ transport_check_aborted_status(se_cmd,
+ (hdr->flags & ISCSI_FLAG_CMD_FINAL));
+ return iscsit_dump_data_payload(conn, payload_length, 1);
+ }
+ } else {
+ /*
+ * For the normal solicited data path:
+ *
+ * Check for a delayed TASK_ABORTED status and dump any
+ * incoming data out payload if one exists. Also, when the
+ * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
+ * data out sequence, we decrement outstanding_r2ts. Once
+ * outstanding_r2ts reaches zero, go ahead and send the delayed
+ * TASK_ABORTED status.
+ */
+ if (se_cmd->transport_state & CMD_T_ABORTED) {
+ if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
+ if (--cmd->outstanding_r2ts < 1) {
+ iscsit_stop_dataout_timer(cmd);
+ transport_check_aborted_status(
+ se_cmd, 1);
+ }
+
+ return iscsit_dump_data_payload(conn, payload_length, 1);
+ }
+ }
+ /*
+ * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
+ * within-command recovery checks before receiving the payload.
+ */
+ ret = iscsit_check_pre_dataout(cmd, buf);
+ if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)
+ return 0;
+ else if (ret == DATAOUT_CANNOT_RECOVER)
+ return -1;
+
+ rx_size += payload_length;
+ iov = &cmd->iov_data[0];
+
+ iov_ret = iscsit_map_iovec(cmd, iov, hdr->offset, payload_length);
+ if (iov_ret < 0)
+ return -1;
+
+ iov_count += iov_ret;
+
+ padding = ((-payload_length) & 3);
+ if (padding != 0) {
+ iov[iov_count].iov_base = cmd->pad_bytes;
+ iov[iov_count++].iov_len = padding;
+ rx_size += padding;
+ pr_debug("Receiving %u padding bytes.\n", padding);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iov[iov_count].iov_base = &checksum;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ rx_size += ISCSI_CRC_LEN;
+ }
+
+ rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
+
+ iscsit_unmap_iovec(cmd);
+
+ if (rx_got != rx_size)
+ return -1;
+
+ if (conn->conn_ops->DataDigest) {
+ u32 data_crc;
+
+ data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd,
+ hdr->offset, payload_length, padding,
+ cmd->pad_bytes);
+
+ if (checksum != data_crc) {
+ pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
+ " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
+ " does not match computed 0x%08x\n",
+ hdr->itt, hdr->offset, payload_length,
+ hdr->datasn, checksum, data_crc);
+ data_crc_failed = 1;
+ } else {
+ pr_debug("Got CRC32C DataDigest 0x%08x for"
+ " %u bytes of Data Out\n", checksum,
+ payload_length);
+ }
+ }
+ /*
+ * Increment post receive data and CRC values or perform
+ * within-command recovery.
+ */
+ ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed);
+ if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY))
+ return 0;
+ else if (ret == DATAOUT_SEND_R2T) {
+ iscsit_set_dataout_sequence_values(cmd);
+ iscsit_build_r2ts_for_cmd(cmd, conn, 0);
+ } else if (ret == DATAOUT_SEND_TO_TRANSPORT) {
+ /*
+ * Handle extra special case for out of order
+ * Unsolicited Data Out.
+ */
+ spin_lock_bh(&cmd->istate_lock);
+ ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN);
+ cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
+ cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
+ spin_unlock_bh(&cmd->istate_lock);
+
+ iscsit_stop_dataout_timer(cmd);
+ return (!ooo_cmdsn) ? transport_generic_handle_data(
+ &cmd->se_cmd) : 0;
+ } else /* DATAOUT_CANNOT_RECOVER */
+ return -1;
+
+ return 0;
+}
+
+static int iscsit_handle_nop_out(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ unsigned char *ping_data = NULL;
+ int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size;
+ u32 checksum, data_crc, padding = 0, payload_length;
+ struct iscsi_cmd *cmd = NULL;
+ struct kvec *iov = NULL;
+ struct iscsi_nopout *hdr;
+
+ hdr = (struct iscsi_nopout *) buf;
+ payload_length = ntoh24(hdr->dlength);
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->ttt = be32_to_cpu(hdr->ttt);
+ hdr->cmdsn = be32_to_cpu(hdr->cmdsn);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+
+ if ((hdr->itt == 0xFFFFFFFF) && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+ pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
+ " not set, protocol error.\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) {
+ pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
+ " greater than MaxRecvDataSegmentLength: %u, protocol"
+ " error.\n", payload_length,
+ conn->conn_ops->MaxRecvDataSegmentLength);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x,"
+ " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
+ (hdr->itt == 0xFFFFFFFF) ? "Response" : "Request",
+ hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn,
+ payload_length);
+ /*
+ * This is not a response to a Unsolicited NopIN, which means
+ * it can either be a NOPOUT ping request (with a valid ITT),
+ * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
+ * Either way, make sure we allocate an struct iscsi_cmd, as both
+ * can contain ping data.
+ */
+ if (hdr->ttt == 0xFFFFFFFF) {
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT;
+ cmd->i_state = ISTATE_SEND_NOPIN;
+ cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ?
+ 1 : 0);
+ conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ cmd->cmd_sn = hdr->cmdsn;
+ cmd->exp_stat_sn = hdr->exp_statsn;
+ cmd->data_direction = DMA_NONE;
+ }
+
+ if (payload_length && (hdr->ttt == 0xFFFFFFFF)) {
+ rx_size = payload_length;
+ ping_data = kzalloc(payload_length + 1, GFP_KERNEL);
+ if (!ping_data) {
+ pr_err("Unable to allocate memory for"
+ " NOPOUT ping data.\n");
+ ret = -1;
+ goto out;
+ }
+
+ iov = &cmd->iov_misc[0];
+ iov[niov].iov_base = ping_data;
+ iov[niov++].iov_len = payload_length;
+
+ padding = ((-payload_length) & 3);
+ if (padding != 0) {
+ pr_debug("Receiving %u additional bytes"
+ " for padding.\n", padding);
+ iov[niov].iov_base = &cmd->pad_bytes;
+ iov[niov++].iov_len = padding;
+ rx_size += padding;
+ }
+ if (conn->conn_ops->DataDigest) {
+ iov[niov].iov_base = &checksum;
+ iov[niov++].iov_len = ISCSI_CRC_LEN;
+ rx_size += ISCSI_CRC_LEN;
+ }
+
+ rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size);
+ if (rx_got != rx_size) {
+ ret = -1;
+ goto out;
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
+ ping_data, payload_length,
+ padding, cmd->pad_bytes,
+ (u8 *)&data_crc);
+
+ if (checksum != data_crc) {
+ pr_err("Ping data CRC32C DataDigest"
+ " 0x%08x does not match computed 0x%08x\n",
+ checksum, data_crc);
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to recover from"
+ " NOPOUT Ping DataCRC failure while in"
+ " ERL=0.\n");
+ ret = -1;
+ goto out;
+ } else {
+ /*
+ * Silently drop this PDU and let the
+ * initiator plug the CmdSN gap.
+ */
+ pr_debug("Dropping NOPOUT"
+ " Command CmdSN: 0x%08x due to"
+ " DataCRC error.\n", hdr->cmdsn);
+ ret = 0;
+ goto out;
+ }
+ } else {
+ pr_debug("Got CRC32C DataDigest"
+ " 0x%08x for %u bytes of ping data.\n",
+ checksum, payload_length);
+ }
+ }
+
+ ping_data[payload_length] = '\0';
+ /*
+ * Attach ping data to struct iscsi_cmd->buf_ptr.
+ */
+ cmd->buf_ptr = ping_data;
+ cmd->buf_ptr_size = payload_length;
+
+ pr_debug("Got %u bytes of NOPOUT ping"
+ " data.\n", payload_length);
+ pr_debug("Ping Data: \"%s\"\n", ping_data);
+ }
+
+ if (hdr->itt != 0xFFFFFFFF) {
+ if (!cmd) {
+ pr_err("Checking CmdSN for NOPOUT,"
+ " but cmd is NULL!\n");
+ return -1;
+ }
+ /*
+ * Initiator is expecting a NopIN ping reply,
+ */
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
+
+ if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
+ iscsit_add_cmd_to_response_queue(cmd, conn,
+ cmd->i_state);
+ return 0;
+ }
+
+ cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
+ ret = 0;
+ goto ping_out;
+ }
+ if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+
+ return 0;
+ }
+
+ if (hdr->ttt != 0xFFFFFFFF) {
+ /*
+ * This was a response to a unsolicited NOPIN ping.
+ */
+ cmd = iscsit_find_cmd_from_ttt(conn, hdr->ttt);
+ if (!cmd)
+ return -1;
+
+ iscsit_stop_nopin_response_timer(conn);
+
+ cmd->i_state = ISTATE_REMOVE;
+ iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
+ iscsit_start_nopin_timer(conn);
+ } else {
+ /*
+ * Initiator is not expecting a NOPIN is response.
+ * Just ignore for now.
+ *
+ * iSCSI v19-91 10.18
+ * "A NOP-OUT may also be used to confirm a changed
+ * ExpStatSN if another PDU will not be available
+ * for a long time."
+ */
+ ret = 0;
+ goto out;
+ }
+
+ return 0;
+out:
+ if (cmd)
+ iscsit_release_cmd(cmd);
+ping_out:
+ kfree(ping_data);
+ return ret;
+}
+
+static int iscsit_handle_task_mgt_cmd(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ struct iscsi_cmd *cmd;
+ struct se_tmr_req *se_tmr;
+ struct iscsi_tmr_req *tmr_req;
+ struct iscsi_tm *hdr;
+ int out_of_order_cmdsn = 0;
+ int ret;
+ u8 function;
+
+ hdr = (struct iscsi_tm *) buf;
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->rtt = be32_to_cpu(hdr->rtt);
+ hdr->cmdsn = be32_to_cpu(hdr->cmdsn);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+ hdr->refcmdsn = be32_to_cpu(hdr->refcmdsn);
+ hdr->exp_datasn = be32_to_cpu(hdr->exp_datasn);
+ hdr->flags &= ~ISCSI_FLAG_CMD_FINAL;
+ function = hdr->flags;
+
+ pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
+ " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
+ " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function,
+ hdr->rtt, hdr->refcmdsn, conn->cid);
+
+ if ((function != ISCSI_TM_FUNC_ABORT_TASK) &&
+ ((function != ISCSI_TM_FUNC_TASK_REASSIGN) &&
+ (hdr->rtt != ISCSI_RESERVED_TAG))) {
+ pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
+ hdr->rtt = ISCSI_RESERVED_TAG;
+ }
+
+ if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) &&
+ !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+ pr_err("Task Management Request TASK_REASSIGN not"
+ " issued as immediate command, bad iSCSI Initiator"
+ "implementation\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+ if ((function != ISCSI_TM_FUNC_ABORT_TASK) &&
+ (hdr->refcmdsn != ISCSI_RESERVED_TAG))
+ hdr->refcmdsn = ISCSI_RESERVED_TAG;
+
+ cmd = iscsit_allocate_se_cmd_for_tmr(conn, function);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC;
+ cmd->i_state = ISTATE_SEND_TASKMGTRSP;
+ cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
+ cmd->init_task_tag = hdr->itt;
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ cmd->cmd_sn = hdr->cmdsn;
+ cmd->exp_stat_sn = hdr->exp_statsn;
+ se_tmr = cmd->se_cmd.se_tmr_req;
+ tmr_req = cmd->tmr_req;
+ /*
+ * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
+ */
+ if (function != ISCSI_TM_FUNC_TASK_REASSIGN) {
+ ret = transport_lookup_tmr_lun(&cmd->se_cmd,
+ scsilun_to_int(&hdr->lun));
+ if (ret < 0) {
+ cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ se_tmr->response = ISCSI_TMF_RSP_NO_LUN;
+ goto attach;
+ }
+ }
+
+ switch (function) {
+ case ISCSI_TM_FUNC_ABORT_TASK:
+ se_tmr->response = iscsit_tmr_abort_task(cmd, buf);
+ if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) {
+ cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ goto attach;
+ }
+ break;
+ case ISCSI_TM_FUNC_ABORT_TASK_SET:
+ case ISCSI_TM_FUNC_CLEAR_ACA:
+ case ISCSI_TM_FUNC_CLEAR_TASK_SET:
+ case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
+ break;
+ case ISCSI_TM_FUNC_TARGET_WARM_RESET:
+ if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) {
+ cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
+ goto attach;
+ }
+ break;
+ case ISCSI_TM_FUNC_TARGET_COLD_RESET:
+ if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) {
+ cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
+ goto attach;
+ }
+ break;
+ case ISCSI_TM_FUNC_TASK_REASSIGN:
+ se_tmr->response = iscsit_tmr_task_reassign(cmd, buf);
+ /*
+ * Perform sanity checks on the ExpDataSN only if the
+ * TASK_REASSIGN was successful.
+ */
+ if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE)
+ break;
+
+ if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_INVALID, 1, 1,
+ buf, cmd);
+ break;
+ default:
+ pr_err("Unknown TMR function: 0x%02x, protocol"
+ " error.\n", function);
+ cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED;
+ goto attach;
+ }
+
+ if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) &&
+ (se_tmr->response == ISCSI_TMF_RSP_COMPLETE))
+ se_tmr->call_transport = 1;
+attach:
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+ int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP)
+ out_of_order_cmdsn = 1;
+ else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
+ return 0;
+ else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+ iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
+
+ if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE))
+ return 0;
+ /*
+ * Found the referenced task, send to transport for processing.
+ */
+ if (se_tmr->call_transport)
+ return transport_generic_handle_tmr(&cmd->se_cmd);
+
+ /*
+ * Could not find the referenced LUN, task, or Task Management
+ * command not authorized or supported. Change state and
+ * let the tx_thread send the response.
+ *
+ * For connection recovery, this is also the default action for
+ * TMR TASK_REASSIGN.
+ */
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+}
+
+/* #warning FIXME: Support Text Command parameters besides SendTargets */
+static int iscsit_handle_text_cmd(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ char *text_ptr, *text_in;
+ int cmdsn_ret, niov = 0, rx_got, rx_size;
+ u32 checksum = 0, data_crc = 0, payload_length;
+ u32 padding = 0, pad_bytes = 0, text_length = 0;
+ struct iscsi_cmd *cmd;
+ struct kvec iov[3];
+ struct iscsi_text *hdr;
+
+ hdr = (struct iscsi_text *) buf;
+ payload_length = ntoh24(hdr->dlength);
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->ttt = be32_to_cpu(hdr->ttt);
+ hdr->cmdsn = be32_to_cpu(hdr->cmdsn);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+
+ if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) {
+ pr_err("Unable to accept text parameter length: %u"
+ "greater than MaxRecvDataSegmentLength %u.\n",
+ payload_length, conn->conn_ops->MaxRecvDataSegmentLength);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
+ " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn,
+ hdr->exp_statsn, payload_length);
+
+ rx_size = text_length = payload_length;
+ if (text_length) {
+ text_in = kzalloc(text_length, GFP_KERNEL);
+ if (!text_in) {
+ pr_err("Unable to allocate memory for"
+ " incoming text parameters\n");
+ return -1;
+ }
+
+ memset(iov, 0, 3 * sizeof(struct kvec));
+ iov[niov].iov_base = text_in;
+ iov[niov++].iov_len = text_length;
+
+ padding = ((-payload_length) & 3);
+ if (padding != 0) {
+ iov[niov].iov_base = &pad_bytes;
+ iov[niov++].iov_len = padding;
+ rx_size += padding;
+ pr_debug("Receiving %u additional bytes"
+ " for padding.\n", padding);
+ }
+ if (conn->conn_ops->DataDigest) {
+ iov[niov].iov_base = &checksum;
+ iov[niov++].iov_len = ISCSI_CRC_LEN;
+ rx_size += ISCSI_CRC_LEN;
+ }
+
+ rx_got = rx_data(conn, &iov[0], niov, rx_size);
+ if (rx_got != rx_size) {
+ kfree(text_in);
+ return -1;
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
+ text_in, text_length,
+ padding, (u8 *)&pad_bytes,
+ (u8 *)&data_crc);
+
+ if (checksum != data_crc) {
+ pr_err("Text data CRC32C DataDigest"
+ " 0x%08x does not match computed"
+ " 0x%08x\n", checksum, data_crc);
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to recover from"
+ " Text Data digest failure while in"
+ " ERL=0.\n");
+ kfree(text_in);
+ return -1;
+ } else {
+ /*
+ * Silently drop this PDU and let the
+ * initiator plug the CmdSN gap.
+ */
+ pr_debug("Dropping Text"
+ " Command CmdSN: 0x%08x due to"
+ " DataCRC error.\n", hdr->cmdsn);
+ kfree(text_in);
+ return 0;
+ }
+ } else {
+ pr_debug("Got CRC32C DataDigest"
+ " 0x%08x for %u bytes of text data.\n",
+ checksum, text_length);
+ }
+ }
+ text_in[text_length - 1] = '\0';
+ pr_debug("Successfully read %d bytes of text"
+ " data.\n", text_length);
+
+ if (strncmp("SendTargets", text_in, 11) != 0) {
+ pr_err("Received Text Data that is not"
+ " SendTargets, cannot continue.\n");
+ kfree(text_in);
+ return -1;
+ }
+ text_ptr = strchr(text_in, '=');
+ if (!text_ptr) {
+ pr_err("No \"=\" separator found in Text Data,"
+ " cannot continue.\n");
+ kfree(text_in);
+ return -1;
+ }
+ if (strncmp("=All", text_ptr, 4) != 0) {
+ pr_err("Unable to locate All value for"
+ " SendTargets key, cannot continue.\n");
+ kfree(text_in);
+ return -1;
+ }
+/*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */
+ kfree(text_in);
+ }
+
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ cmd->iscsi_opcode = ISCSI_OP_TEXT;
+ cmd->i_state = ISTATE_SEND_TEXTRSP;
+ cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
+ conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ cmd->cmd_sn = hdr->cmdsn;
+ cmd->exp_stat_sn = hdr->exp_statsn;
+ cmd->data_direction = DMA_NONE;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
+
+ if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+ cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+
+ return 0;
+ }
+
+ return iscsit_execute_cmd(cmd, 0);
+}
+
+int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
+{
+ struct iscsi_conn *conn_p;
+ struct iscsi_session *sess = conn->sess;
+
+ pr_debug("Received logout request CLOSESESSION on CID: %hu"
+ " for SID: %u.\n", conn->cid, conn->sess->sid);
+
+ atomic_set(&sess->session_logout, 1);
+ atomic_set(&conn->conn_logout_remove, 1);
+ conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION;
+
+ iscsit_inc_conn_usage_count(conn);
+ iscsit_inc_session_usage_count(sess);
+
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) {
+ if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN)
+ continue;
+
+ pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
+ conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT;
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ return 0;
+}
+
+int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
+{
+ struct iscsi_conn *l_conn;
+ struct iscsi_session *sess = conn->sess;
+
+ pr_debug("Received logout request CLOSECONNECTION for CID:"
+ " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid);
+
+ /*
+ * A Logout Request with a CLOSECONNECTION reason code for a CID
+ * can arrive on a connection with a differing CID.
+ */
+ if (conn->cid == cmd->logout_cid) {
+ spin_lock_bh(&conn->state_lock);
+ pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
+ conn->conn_state = TARG_CONN_STATE_IN_LOGOUT;
+
+ atomic_set(&conn->conn_logout_remove, 1);
+ conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION;
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_unlock_bh(&conn->state_lock);
+ } else {
+ /*
+ * Handle all different cid CLOSECONNECTION requests in
+ * iscsit_logout_post_handler_diffcid() as to give enough
+ * time for any non immediate command's CmdSN to be
+ * acknowledged on the connection in question.
+ *
+ * Here we simply make sure the CID is still around.
+ */
+ l_conn = iscsit_get_conn_from_cid(sess,
+ cmd->logout_cid);
+ if (!l_conn) {
+ cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND;
+ iscsit_add_cmd_to_response_queue(cmd, conn,
+ cmd->i_state);
+ return 0;
+ }
+
+ iscsit_dec_conn_usage_count(l_conn);
+ }
+
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ return 0;
+}
+
+int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+
+ pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
+ " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid);
+
+ if (sess->sess_ops->ErrorRecoveryLevel != 2) {
+ pr_err("Received Logout Request REMOVECONNFORRECOVERY"
+ " while ERL!=2.\n");
+ cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+ }
+
+ if (conn->cid == cmd->logout_cid) {
+ pr_err("Received Logout Request REMOVECONNFORRECOVERY"
+ " with CID: %hu on CID: %hu, implementation error.\n",
+ cmd->logout_cid, conn->cid);
+ cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+ }
+
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ return 0;
+}
+
+static int iscsit_handle_logout_cmd(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ int cmdsn_ret, logout_remove = 0;
+ u8 reason_code = 0;
+ struct iscsi_cmd *cmd;
+ struct iscsi_logout *hdr;
+ struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn);
+
+ hdr = (struct iscsi_logout *) buf;
+ reason_code = (hdr->flags & 0x7f);
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->cid = be16_to_cpu(hdr->cid);
+ hdr->cmdsn = be32_to_cpu(hdr->cmdsn);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+
+ if (tiqn) {
+ spin_lock(&tiqn->logout_stats.lock);
+ if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION)
+ tiqn->logout_stats.normal_logouts++;
+ else
+ tiqn->logout_stats.abnormal_logouts++;
+ spin_unlock(&tiqn->logout_stats.lock);
+ }
+
+ pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
+ " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
+ hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code,
+ hdr->cid, conn->cid);
+
+ if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) {
+ pr_err("Received logout request on connection that"
+ " is not in logged in state, ignoring request.\n");
+ return 0;
+ }
+
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1,
+ buf, conn);
+
+ cmd->iscsi_opcode = ISCSI_OP_LOGOUT;
+ cmd->i_state = ISTATE_SEND_LOGOUTRSP;
+ cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
+ conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ cmd->cmd_sn = hdr->cmdsn;
+ cmd->exp_stat_sn = hdr->exp_statsn;
+ cmd->logout_cid = hdr->cid;
+ cmd->logout_reason = reason_code;
+ cmd->data_direction = DMA_NONE;
+
+ /*
+ * We need to sleep in these cases (by returning 1) until the Logout
+ * Response gets sent in the tx thread.
+ */
+ if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) ||
+ ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) &&
+ (hdr->cid == conn->cid)))
+ logout_remove = 1;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY)
+ iscsit_ack_from_expstatsn(conn, hdr->exp_statsn);
+
+ /*
+ * Immediate commands are executed, well, immediately.
+ * Non-Immediate Logout Commands are executed in CmdSN order.
+ */
+ if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
+ int ret = iscsit_execute_cmd(cmd, 0);
+
+ if (ret < 0)
+ return ret;
+ } else {
+ cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+ if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
+ logout_remove = 0;
+ } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) {
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+ }
+
+ return logout_remove;
+}
+
+static int iscsit_handle_snack(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ struct iscsi_snack *hdr;
+
+ hdr = (struct iscsi_snack *) buf;
+ hdr->flags &= ~ISCSI_FLAG_CMD_FINAL;
+ hdr->itt = be32_to_cpu(hdr->itt);
+ hdr->ttt = be32_to_cpu(hdr->ttt);
+ hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn);
+ hdr->begrun = be32_to_cpu(hdr->begrun);
+ hdr->runlength = be32_to_cpu(hdr->runlength);
+
+ pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
+ " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
+ " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags,
+ hdr->begrun, hdr->runlength, conn->cid);
+
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Initiator sent SNACK request while in"
+ " ErrorRecoveryLevel=0.\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+ /*
+ * SNACK_DATA and SNACK_R2T are both 0, so check which function to
+ * call from inside iscsi_send_recovery_datain_or_r2t().
+ */
+ switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) {
+ case 0:
+ return iscsit_handle_recovery_datain_or_r2t(conn, buf,
+ hdr->itt, hdr->ttt, hdr->begrun, hdr->runlength);
+ case ISCSI_FLAG_SNACK_TYPE_STATUS:
+ return iscsit_handle_status_snack(conn, hdr->itt, hdr->ttt,
+ hdr->begrun, hdr->runlength);
+ case ISCSI_FLAG_SNACK_TYPE_DATA_ACK:
+ return iscsit_handle_data_ack(conn, hdr->ttt, hdr->begrun,
+ hdr->runlength);
+ case ISCSI_FLAG_SNACK_TYPE_RDATA:
+ /* FIXME: Support R-Data SNACK */
+ pr_err("R-Data SNACK Not Supported.\n");
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ default:
+ pr_err("Unknown SNACK type 0x%02x, protocol"
+ " error.\n", hdr->flags & 0x0f);
+ return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buf, conn);
+ }
+
+ return 0;
+}
+
+static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn)
+{
+ if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) ||
+ (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) {
+ wait_for_completion_interruptible_timeout(
+ &conn->rx_half_close_comp,
+ ISCSI_RX_THREAD_TCP_TIMEOUT * HZ);
+ }
+}
+
+static int iscsit_handle_immediate_data(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf,
+ u32 length)
+{
+ int iov_ret, rx_got = 0, rx_size = 0;
+ u32 checksum, iov_count = 0, padding = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct kvec *iov;
+
+ iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length);
+ if (iov_ret < 0)
+ return IMMEDIATE_DATA_CANNOT_RECOVER;
+
+ rx_size = length;
+ iov_count = iov_ret;
+ iov = &cmd->iov_data[0];
+
+ padding = ((-length) & 3);
+ if (padding != 0) {
+ iov[iov_count].iov_base = cmd->pad_bytes;
+ iov[iov_count++].iov_len = padding;
+ rx_size += padding;
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iov[iov_count].iov_base = &checksum;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ rx_size += ISCSI_CRC_LEN;
+ }
+
+ rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
+
+ iscsit_unmap_iovec(cmd);
+
+ if (rx_got != rx_size) {
+ iscsit_rx_thread_wait_for_tcp(conn);
+ return IMMEDIATE_DATA_CANNOT_RECOVER;
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ u32 data_crc;
+
+ data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd,
+ cmd->write_data_done, length, padding,
+ cmd->pad_bytes);
+
+ if (checksum != data_crc) {
+ pr_err("ImmediateData CRC32C DataDigest 0x%08x"
+ " does not match computed 0x%08x\n", checksum,
+ data_crc);
+
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to recover from"
+ " Immediate Data digest failure while"
+ " in ERL=0.\n");
+ iscsit_add_reject_from_cmd(
+ ISCSI_REASON_DATA_DIGEST_ERROR,
+ 1, 0, buf, cmd);
+ return IMMEDIATE_DATA_CANNOT_RECOVER;
+ } else {
+ iscsit_add_reject_from_cmd(
+ ISCSI_REASON_DATA_DIGEST_ERROR,
+ 0, 0, buf, cmd);
+ return IMMEDIATE_DATA_ERL1_CRC_FAILURE;
+ }
+ } else {
+ pr_debug("Got CRC32C DataDigest 0x%08x for"
+ " %u bytes of Immediate Data\n", checksum,
+ length);
+ }
+ }
+
+ cmd->write_data_done += length;
+
+ if (cmd->write_data_done == cmd->data_length) {
+ spin_lock_bh(&cmd->istate_lock);
+ cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
+ cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
+ spin_unlock_bh(&cmd->istate_lock);
+ }
+
+ return IMMEDIATE_DATA_NORMAL_OPERATION;
+}
+
+/*
+ * Called with sess->conn_lock held.
+ */
+/* #warning iscsi_build_conn_drop_async_message() only sends out on connections
+ with active network interface */
+static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn)
+{
+ struct iscsi_cmd *cmd;
+ struct iscsi_conn *conn_p;
+ bool found = false;
+
+ /*
+ * Only send a Asynchronous Message on connections whos network
+ * interface is still functional.
+ */
+ list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) {
+ if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) {
+ iscsit_inc_conn_usage_count(conn_p);
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ return;
+
+ cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC);
+ if (!cmd) {
+ iscsit_dec_conn_usage_count(conn_p);
+ return;
+ }
+
+ cmd->logout_cid = conn->cid;
+ cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
+ cmd->i_state = ISTATE_SEND_ASYNCMSG;
+
+ spin_lock_bh(&conn_p->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn_p->conn_cmd_list);
+ spin_unlock_bh(&conn_p->cmd_lock);
+
+ iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state);
+ iscsit_dec_conn_usage_count(conn_p);
+}
+
+static int iscsit_send_conn_drop_async_message(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_async *hdr;
+
+ cmd->tx_size = ISCSI_HDR_LEN;
+ cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
+
+ hdr = (struct iscsi_async *) cmd->pdu;
+ hdr->opcode = ISCSI_OP_ASYNC_EVENT;
+ hdr->flags = ISCSI_FLAG_CMD_FINAL;
+ cmd->init_task_tag = 0xFFFFFFFF;
+ cmd->targ_xfer_tag = 0xFFFFFFFF;
+ put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]);
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+ hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION;
+ hdr->param1 = cpu_to_be16(cmd->logout_cid);
+ hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait);
+ hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain);
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ cmd->tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32C HeaderDigest to"
+ " Async Message 0x%08x\n", *header_digest);
+ }
+
+ cmd->iov_misc[0].iov_base = cmd->pdu;
+ cmd->iov_misc[0].iov_len = cmd->tx_size;
+ cmd->iov_misc_count = 1;
+
+ pr_debug("Sending Connection Dropped Async Message StatSN:"
+ " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn,
+ cmd->logout_cid, conn->cid);
+ return 0;
+}
+
+static int iscsit_send_data_in(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ int *eodr)
+{
+ int iov_ret = 0, set_statsn = 0;
+ u32 iov_count = 0, tx_size = 0;
+ struct iscsi_datain datain;
+ struct iscsi_datain_req *dr;
+ struct iscsi_data_rsp *hdr;
+ struct kvec *iov;
+
+ memset(&datain, 0, sizeof(struct iscsi_datain));
+ dr = iscsit_get_datain_values(cmd, &datain);
+ if (!dr) {
+ pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
+ cmd->init_task_tag);
+ return -1;
+ }
+
+ /*
+ * Be paranoid and double check the logic for now.
+ */
+ if ((datain.offset + datain.length) > cmd->data_length) {
+ pr_err("Command ITT: 0x%08x, datain.offset: %u and"
+ " datain.length: %u exceeds cmd->data_length: %u\n",
+ cmd->init_task_tag, datain.offset, datain.length,
+ cmd->data_length);
+ return -1;
+ }
+
+ spin_lock_bh(&conn->sess->session_stats_lock);
+ conn->sess->tx_data_octets += datain.length;
+ if (conn->sess->se_sess->se_node_acl) {
+ spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ conn->sess->se_sess->se_node_acl->read_bytes += datain.length;
+ spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock);
+ }
+ spin_unlock_bh(&conn->sess->session_stats_lock);
+ /*
+ * Special case for successfully execution w/ both DATAIN
+ * and Sense Data.
+ */
+ if ((datain.flags & ISCSI_FLAG_DATA_STATUS) &&
+ (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE))
+ datain.flags &= ~ISCSI_FLAG_DATA_STATUS;
+ else {
+ if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) ||
+ (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) {
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ cmd->stat_sn = conn->stat_sn++;
+ set_statsn = 1;
+ } else if (dr->dr_complete ==
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY)
+ set_statsn = 1;
+ }
+
+ hdr = (struct iscsi_data_rsp *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_SCSI_DATA_IN;
+ hdr->flags = datain.flags;
+ if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
+ if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) {
+ hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW;
+ hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
+ } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) {
+ hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW;
+ hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
+ }
+ }
+ hton24(hdr->dlength, datain.length);
+ if (hdr->flags & ISCSI_FLAG_DATA_ACK)
+ int_to_scsilun(cmd->se_cmd.orig_fe_lun,
+ (struct scsi_lun *)&hdr->lun);
+ else
+ put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun);
+
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ hdr->ttt = (hdr->flags & ISCSI_FLAG_DATA_ACK) ?
+ cpu_to_be32(cmd->targ_xfer_tag) :
+ 0xFFFFFFFF;
+ hdr->statsn = (set_statsn) ? cpu_to_be32(cmd->stat_sn) :
+ 0xFFFFFFFF;
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+ hdr->datasn = cpu_to_be32(datain.data_sn);
+ hdr->offset = cpu_to_be32(datain.offset);
+
+ iov = &cmd->iov_data[0];
+ iov[iov_count].iov_base = cmd->pdu;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+ tx_size += ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attaching CRC32 HeaderDigest"
+ " for DataIN PDU 0x%08x\n", *header_digest);
+ }
+
+ iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length);
+ if (iov_ret < 0)
+ return -1;
+
+ iov_count += iov_ret;
+ tx_size += datain.length;
+
+ cmd->padding = ((-datain.length) & 3);
+ if (cmd->padding) {
+ iov[iov_count].iov_base = cmd->pad_bytes;
+ iov[iov_count++].iov_len = cmd->padding;
+ tx_size += cmd->padding;
+
+ pr_debug("Attaching %u padding bytes\n",
+ cmd->padding);
+ }
+ if (conn->conn_ops->DataDigest) {
+ cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd,
+ datain.offset, datain.length, cmd->padding, cmd->pad_bytes);
+
+ iov[iov_count].iov_base = &cmd->data_crc;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attached CRC32C DataDigest %d bytes, crc"
+ " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc);
+ }
+
+ cmd->iov_data_count = iov_count;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
+ " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
+ cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn),
+ ntohl(hdr->offset), datain.length, conn->cid);
+
+ if (dr->dr_complete) {
+ *eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ?
+ 2 : 1;
+ iscsit_free_datain_req(cmd, dr);
+ }
+
+ return 0;
+}
+
+static int iscsit_send_logout_response(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ int niov = 0, tx_size;
+ struct iscsi_conn *logout_conn = NULL;
+ struct iscsi_conn_recovery *cr = NULL;
+ struct iscsi_session *sess = conn->sess;
+ struct kvec *iov;
+ struct iscsi_logout_rsp *hdr;
+ /*
+ * The actual shutting down of Sessions and/or Connections
+ * for CLOSESESSION and CLOSECONNECTION Logout Requests
+ * is done in scsi_logout_post_handler().
+ */
+ switch (cmd->logout_reason) {
+ case ISCSI_LOGOUT_REASON_CLOSE_SESSION:
+ pr_debug("iSCSI session logout successful, setting"
+ " logout response to ISCSI_LOGOUT_SUCCESS.\n");
+ cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
+ break;
+ case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
+ if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND)
+ break;
+ /*
+ * For CLOSECONNECTION logout requests carrying
+ * a matching logout CID -> local CID, the reference
+ * for the local CID will have been incremented in
+ * iscsi_logout_closeconnection().
+ *
+ * For CLOSECONNECTION logout requests carrying
+ * a different CID than the connection it arrived
+ * on, the connection responding to cmd->logout_cid
+ * is stopped in iscsit_logout_post_handler_diffcid().
+ */
+
+ pr_debug("iSCSI CID: %hu logout on CID: %hu"
+ " successful.\n", cmd->logout_cid, conn->cid);
+ cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
+ break;
+ case ISCSI_LOGOUT_REASON_RECOVERY:
+ if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) ||
+ (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED))
+ break;
+ /*
+ * If the connection is still active from our point of view
+ * force connection recovery to occur.
+ */
+ logout_conn = iscsit_get_conn_from_cid_rcfr(sess,
+ cmd->logout_cid);
+ if ((logout_conn)) {
+ iscsit_connection_reinstatement_rcfr(logout_conn);
+ iscsit_dec_conn_usage_count(logout_conn);
+ }
+
+ cr = iscsit_get_inactive_connection_recovery_entry(
+ conn->sess, cmd->logout_cid);
+ if (!cr) {
+ pr_err("Unable to locate CID: %hu for"
+ " REMOVECONNFORRECOVERY Logout Request.\n",
+ cmd->logout_cid);
+ cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND;
+ break;
+ }
+
+ iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn);
+
+ pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
+ " for recovery for CID: %hu on CID: %hu successful.\n",
+ cmd->logout_cid, conn->cid);
+ cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
+ break;
+ default:
+ pr_err("Unknown cmd->logout_reason: 0x%02x\n",
+ cmd->logout_reason);
+ return -1;
+ }
+
+ tx_size = ISCSI_HDR_LEN;
+ hdr = (struct iscsi_logout_rsp *)cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_LOGOUT_RSP;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hdr->response = cmd->logout_response;
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ iov = &cmd->iov_misc[0];
+ iov[niov].iov_base = cmd->pdu;
+ iov[niov++].iov_len = ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32C HeaderDigest to"
+ " Logout Response 0x%08x\n", *header_digest);
+ }
+ cmd->iov_misc_count = niov;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Sending Logout Response ITT: 0x%08x StatSN:"
+ " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
+ cmd->init_task_tag, cmd->stat_sn, hdr->response,
+ cmd->logout_cid, conn->cid);
+
+ return 0;
+}
+
+/*
+ * Unsolicited NOPIN, either requesting a response or not.
+ */
+static int iscsit_send_unsolicited_nopin(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ int want_response)
+{
+ int tx_size = ISCSI_HDR_LEN;
+ struct iscsi_nopin *hdr;
+
+ hdr = (struct iscsi_nopin *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_NOOP_IN;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
+ cmd->stat_sn = conn->stat_sn;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32C HeaderDigest to"
+ " NopIN 0x%08x\n", *header_digest);
+ }
+
+ cmd->iov_misc[0].iov_base = cmd->pdu;
+ cmd->iov_misc[0].iov_len = tx_size;
+ cmd->iov_misc_count = 1;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
+ " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid);
+
+ return 0;
+}
+
+static int iscsit_send_nopin_response(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ int niov = 0, tx_size;
+ u32 padding = 0;
+ struct kvec *iov;
+ struct iscsi_nopin *hdr;
+
+ tx_size = ISCSI_HDR_LEN;
+ hdr = (struct iscsi_nopin *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_NOOP_IN;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hton24(hdr->dlength, cmd->buf_ptr_size);
+ put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun);
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ iov = &cmd->iov_misc[0];
+ iov[niov].iov_base = cmd->pdu;
+ iov[niov++].iov_len = ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32C HeaderDigest"
+ " to NopIn 0x%08x\n", *header_digest);
+ }
+
+ /*
+ * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
+ * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
+ */
+ if (cmd->buf_ptr_size) {
+ iov[niov].iov_base = cmd->buf_ptr;
+ iov[niov++].iov_len = cmd->buf_ptr_size;
+ tx_size += cmd->buf_ptr_size;
+
+ pr_debug("Echoing back %u bytes of ping"
+ " data.\n", cmd->buf_ptr_size);
+
+ padding = ((-cmd->buf_ptr_size) & 3);
+ if (padding != 0) {
+ iov[niov].iov_base = &cmd->pad_bytes;
+ iov[niov++].iov_len = padding;
+ tx_size += padding;
+ pr_debug("Attaching %u additional"
+ " padding bytes.\n", padding);
+ }
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ cmd->buf_ptr, cmd->buf_ptr_size,
+ padding, (u8 *)&cmd->pad_bytes,
+ (u8 *)&cmd->data_crc);
+
+ iov[niov].iov_base = &cmd->data_crc;
+ iov[niov++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attached DataDigest for %u"
+ " bytes of ping data, CRC 0x%08x\n",
+ cmd->buf_ptr_size, cmd->data_crc);
+ }
+ }
+
+ cmd->iov_misc_count = niov;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:"
+ " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag,
+ cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size);
+
+ return 0;
+}
+
+int iscsit_send_r2t(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ int tx_size = 0;
+ struct iscsi_r2t *r2t;
+ struct iscsi_r2t_rsp *hdr;
+
+ r2t = iscsit_get_r2t_from_list(cmd);
+ if (!r2t)
+ return -1;
+
+ hdr = (struct iscsi_r2t_rsp *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_R2T;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ int_to_scsilun(cmd->se_cmd.orig_fe_lun,
+ (struct scsi_lun *)&hdr->lun);
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ spin_lock_bh(&conn->sess->ttt_lock);
+ r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++;
+ if (r2t->targ_xfer_tag == 0xFFFFFFFF)
+ r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++;
+ spin_unlock_bh(&conn->sess->ttt_lock);
+ hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag);
+ hdr->statsn = cpu_to_be32(conn->stat_sn);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+ hdr->r2tsn = cpu_to_be32(r2t->r2t_sn);
+ hdr->data_offset = cpu_to_be32(r2t->offset);
+ hdr->data_length = cpu_to_be32(r2t->xfer_len);
+
+ cmd->iov_misc[0].iov_base = cmd->pdu;
+ cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN;
+ tx_size += ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 HeaderDigest for R2T"
+ " PDU 0x%08x\n", *header_digest);
+ }
+
+ pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
+ " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
+ (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag,
+ r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn,
+ r2t->offset, r2t->xfer_len, conn->cid);
+
+ cmd->iov_misc_count = 1;
+ cmd->tx_size = tx_size;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ r2t->sent_r2t = 1;
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return 0;
+}
+
+/*
+ * type 0: Normal Operation.
+ * type 1: Called from Storage Transport.
+ * type 2: Called from iscsi_task_reassign_complete_write() for
+ * connection recovery.
+ */
+int iscsit_build_r2ts_for_cmd(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ int type)
+{
+ int first_r2t = 1;
+ u32 offset = 0, xfer_len = 0;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ if (cmd->cmd_flags & ICF_SENT_LAST_R2T) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return 0;
+ }
+
+ if (conn->sess->sess_ops->DataSequenceInOrder && (type != 2))
+ if (cmd->r2t_offset < cmd->write_data_done)
+ cmd->r2t_offset = cmd->write_data_done;
+
+ while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) {
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ offset = cmd->r2t_offset;
+
+ if (first_r2t && (type == 2)) {
+ xfer_len = ((offset +
+ (conn->sess->sess_ops->MaxBurstLength -
+ cmd->next_burst_len) >
+ cmd->data_length) ?
+ (cmd->data_length - offset) :
+ (conn->sess->sess_ops->MaxBurstLength -
+ cmd->next_burst_len));
+ } else {
+ xfer_len = ((offset +
+ conn->sess->sess_ops->MaxBurstLength) >
+ cmd->data_length) ?
+ (cmd->data_length - offset) :
+ conn->sess->sess_ops->MaxBurstLength;
+ }
+ cmd->r2t_offset += xfer_len;
+
+ if (cmd->r2t_offset == cmd->data_length)
+ cmd->cmd_flags |= ICF_SENT_LAST_R2T;
+ } else {
+ struct iscsi_seq *seq;
+
+ seq = iscsit_get_seq_holder_for_r2t(cmd);
+ if (!seq) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ offset = seq->offset;
+ xfer_len = seq->xfer_len;
+
+ if (cmd->seq_send_order == cmd->seq_count)
+ cmd->cmd_flags |= ICF_SENT_LAST_R2T;
+ }
+ cmd->outstanding_r2ts++;
+ first_r2t = 0;
+
+ if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ if (cmd->cmd_flags & ICF_SENT_LAST_R2T)
+ break;
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return 0;
+}
+
+static int iscsit_send_status(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ u8 iov_count = 0, recovery;
+ u32 padding = 0, tx_size = 0;
+ struct iscsi_scsi_rsp *hdr;
+ struct kvec *iov;
+
+ recovery = (cmd->i_state != ISTATE_SEND_STATUS);
+ if (!recovery)
+ cmd->stat_sn = conn->stat_sn++;
+
+ spin_lock_bh(&conn->sess->session_stats_lock);
+ conn->sess->rsp_pdus++;
+ spin_unlock_bh(&conn->sess->session_stats_lock);
+
+ hdr = (struct iscsi_scsi_rsp *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_SCSI_CMD_RSP;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) {
+ hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW;
+ hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
+ } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) {
+ hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
+ hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
+ }
+ hdr->response = cmd->iscsi_response;
+ hdr->cmd_status = cmd->se_cmd.scsi_status;
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ iov = &cmd->iov_misc[0];
+ iov[iov_count].iov_base = cmd->pdu;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+ tx_size += ISCSI_HDR_LEN;
+
+ /*
+ * Attach SENSE DATA payload to iSCSI Response PDU
+ */
+ if (cmd->se_cmd.sense_buffer &&
+ ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
+ (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
+ padding = -(cmd->se_cmd.scsi_sense_length) & 3;
+ hton24(hdr->dlength, cmd->se_cmd.scsi_sense_length);
+ iov[iov_count].iov_base = cmd->se_cmd.sense_buffer;
+ iov[iov_count++].iov_len =
+ (cmd->se_cmd.scsi_sense_length + padding);
+ tx_size += cmd->se_cmd.scsi_sense_length;
+
+ if (padding) {
+ memset(cmd->se_cmd.sense_buffer +
+ cmd->se_cmd.scsi_sense_length, 0, padding);
+ tx_size += padding;
+ pr_debug("Adding %u bytes of padding to"
+ " SENSE.\n", padding);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ cmd->se_cmd.sense_buffer,
+ (cmd->se_cmd.scsi_sense_length + padding),
+ 0, NULL, (u8 *)&cmd->data_crc);
+
+ iov[iov_count].iov_base = &cmd->data_crc;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attaching CRC32 DataDigest for"
+ " SENSE, %u bytes CRC 0x%08x\n",
+ (cmd->se_cmd.scsi_sense_length + padding),
+ cmd->data_crc);
+ }
+
+ pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
+ " Response PDU\n",
+ cmd->se_cmd.scsi_sense_length);
+ }
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 HeaderDigest for Response"
+ " PDU 0x%08x\n", *header_digest);
+ }
+
+ cmd->iov_misc_count = iov_count;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
+ " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
+ (!recovery) ? "" : "Recovery ", cmd->init_task_tag,
+ cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid);
+
+ return 0;
+}
+
+static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr)
+{
+ switch (se_tmr->response) {
+ case TMR_FUNCTION_COMPLETE:
+ return ISCSI_TMF_RSP_COMPLETE;
+ case TMR_TASK_DOES_NOT_EXIST:
+ return ISCSI_TMF_RSP_NO_TASK;
+ case TMR_LUN_DOES_NOT_EXIST:
+ return ISCSI_TMF_RSP_NO_LUN;
+ case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED:
+ return ISCSI_TMF_RSP_NOT_SUPPORTED;
+ case TMR_FUNCTION_AUTHORIZATION_FAILED:
+ return ISCSI_TMF_RSP_AUTH_FAILED;
+ case TMR_FUNCTION_REJECTED:
+ default:
+ return ISCSI_TMF_RSP_REJECTED;
+ }
+}
+
+static int iscsit_send_task_mgt_rsp(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
+ struct iscsi_tm_rsp *hdr;
+ u32 tx_size = 0;
+
+ hdr = (struct iscsi_tm_rsp *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP;
+ hdr->flags = ISCSI_FLAG_CMD_FINAL;
+ hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr);
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ cmd->iov_misc[0].iov_base = cmd->pdu;
+ cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN;
+ tx_size += ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 HeaderDigest for Task"
+ " Mgmt Response PDU 0x%08x\n", *header_digest);
+ }
+
+ cmd->iov_misc_count = 1;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Built Task Management Response ITT: 0x%08x,"
+ " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
+ cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid);
+
+ return 0;
+}
+
+static bool iscsit_check_inaddr_any(struct iscsi_np *np)
+{
+ bool ret = false;
+
+ if (np->np_sockaddr.ss_family == AF_INET6) {
+ const struct sockaddr_in6 sin6 = {
+ .sin6_addr = IN6ADDR_ANY_INIT };
+ struct sockaddr_in6 *sock_in6 =
+ (struct sockaddr_in6 *)&np->np_sockaddr;
+
+ if (!memcmp(sock_in6->sin6_addr.s6_addr,
+ sin6.sin6_addr.s6_addr, 16))
+ ret = true;
+ } else {
+ struct sockaddr_in * sock_in =
+ (struct sockaddr_in *)&np->np_sockaddr;
+
+ if (sock_in->sin_addr.s_addr == INADDR_ANY)
+ ret = true;
+ }
+
+ return ret;
+}
+
+static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd)
+{
+ char *payload = NULL;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tiqn *tiqn;
+ struct iscsi_tpg_np *tpg_np;
+ int buffer_len, end_of_buf = 0, len = 0, payload_len = 0;
+ unsigned char buf[256];
+
+ buffer_len = (conn->conn_ops->MaxRecvDataSegmentLength > 32768) ?
+ 32768 : conn->conn_ops->MaxRecvDataSegmentLength;
+
+ memset(buf, 0, 256);
+
+ payload = kzalloc(buffer_len, GFP_KERNEL);
+ if (!payload) {
+ pr_err("Unable to allocate memory for sendtargets"
+ " response.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock(&tiqn_lock);
+ list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) {
+ len = sprintf(buf, "TargetName=%s", tiqn->tiqn);
+ len += 1;
+
+ if ((len + payload_len) > buffer_len) {
+ end_of_buf = 1;
+ goto eob;
+ }
+ memcpy(payload + payload_len, buf, len);
+ payload_len += len;
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
+
+ spin_lock(&tpg->tpg_state_lock);
+ if ((tpg->tpg_state == TPG_STATE_FREE) ||
+ (tpg->tpg_state == TPG_STATE_INACTIVE)) {
+ spin_unlock(&tpg->tpg_state_lock);
+ continue;
+ }
+ spin_unlock(&tpg->tpg_state_lock);
+
+ spin_lock(&tpg->tpg_np_lock);
+ list_for_each_entry(tpg_np, &tpg->tpg_gnp_list,
+ tpg_np_list) {
+ struct iscsi_np *np = tpg_np->tpg_np;
+ bool inaddr_any = iscsit_check_inaddr_any(np);
+
+ len = sprintf(buf, "TargetAddress="
+ "%s%s%s:%hu,%hu",
+ (np->np_sockaddr.ss_family == AF_INET6) ?
+ "[" : "", (inaddr_any == false) ?
+ np->np_ip : conn->local_ip,
+ (np->np_sockaddr.ss_family == AF_INET6) ?
+ "]" : "", (inaddr_any == false) ?
+ np->np_port : conn->local_port,
+ tpg->tpgt);
+ len += 1;
+
+ if ((len + payload_len) > buffer_len) {
+ spin_unlock(&tpg->tpg_np_lock);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+ end_of_buf = 1;
+ goto eob;
+ }
+ memcpy(payload + payload_len, buf, len);
+ payload_len += len;
+ }
+ spin_unlock(&tpg->tpg_np_lock);
+ }
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+eob:
+ if (end_of_buf)
+ break;
+ }
+ spin_unlock(&tiqn_lock);
+
+ cmd->buf_ptr = payload;
+
+ return payload_len;
+}
+
+/*
+ * FIXME: Add support for F_BIT and C_BIT when the length is longer than
+ * MaxRecvDataSegmentLength.
+ */
+static int iscsit_send_text_rsp(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_text_rsp *hdr;
+ struct kvec *iov;
+ u32 padding = 0, tx_size = 0;
+ int text_length, iov_count = 0;
+
+ text_length = iscsit_build_sendtargets_response(cmd);
+ if (text_length < 0)
+ return text_length;
+
+ padding = ((-text_length) & 3);
+ if (padding != 0) {
+ memset(cmd->buf_ptr + text_length, 0, padding);
+ pr_debug("Attaching %u additional bytes for"
+ " padding.\n", padding);
+ }
+
+ hdr = (struct iscsi_text_rsp *) cmd->pdu;
+ memset(hdr, 0, ISCSI_HDR_LEN);
+ hdr->opcode = ISCSI_OP_TEXT_RSP;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hton24(hdr->dlength, text_length);
+ hdr->itt = cpu_to_be32(cmd->init_task_tag);
+ hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+
+ iscsit_increment_maxcmdsn(cmd, conn->sess);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ iov = &cmd->iov_misc[0];
+
+ iov[iov_count].iov_base = cmd->pdu;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+ iov[iov_count].iov_base = cmd->buf_ptr;
+ iov[iov_count++].iov_len = text_length + padding;
+
+ tx_size += (ISCSI_HDR_LEN + text_length + padding);
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 HeaderDigest for"
+ " Text Response PDU 0x%08x\n", *header_digest);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ cmd->buf_ptr, (text_length + padding),
+ 0, NULL, (u8 *)&cmd->data_crc);
+
+ iov[iov_count].iov_base = &cmd->data_crc;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attaching DataDigest for %u bytes of text"
+ " data, CRC 0x%08x\n", (text_length + padding),
+ cmd->data_crc);
+ }
+
+ cmd->iov_misc_count = iov_count;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
+ " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn,
+ text_length, conn->cid);
+ return 0;
+}
+
+static int iscsit_send_reject(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ u32 iov_count = 0, tx_size = 0;
+ struct iscsi_reject *hdr;
+ struct kvec *iov;
+
+ hdr = (struct iscsi_reject *) cmd->pdu;
+ hdr->opcode = ISCSI_OP_REJECT;
+ hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+ hton24(hdr->dlength, ISCSI_HDR_LEN);
+ hdr->ffffffff = 0xffffffff;
+ cmd->stat_sn = conn->stat_sn++;
+ hdr->statsn = cpu_to_be32(cmd->stat_sn);
+ hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ iov = &cmd->iov_misc[0];
+
+ iov[iov_count].iov_base = cmd->pdu;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+ iov[iov_count].iov_base = cmd->buf_ptr;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+
+ tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN);
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)hdr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 HeaderDigest for"
+ " REJECT PDU 0x%08x\n", *header_digest);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
+ (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)&cmd->data_crc);
+
+ iov[iov_count].iov_base = &cmd->data_crc;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32 DataDigest for REJECT"
+ " PDU 0x%08x\n", cmd->data_crc);
+ }
+
+ cmd->iov_misc_count = iov_count;
+ cmd->tx_size = tx_size;
+
+ pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
+ " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid);
+
+ return 0;
+}
+
+static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn)
+{
+ if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) ||
+ (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) {
+ wait_for_completion_interruptible_timeout(
+ &conn->tx_half_close_comp,
+ ISCSI_TX_THREAD_TCP_TIMEOUT * HZ);
+ }
+}
+
+#ifdef CONFIG_SMP
+
+void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
+{
+ struct iscsi_thread_set *ts = conn->thread_set;
+ int ord, cpu;
+ /*
+ * thread_id is assigned from iscsit_global->ts_bitmap from
+ * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
+ *
+ * Here we use thread_id to determine which CPU that this
+ * iSCSI connection's iscsi_thread_set will be scheduled to
+ * execute upon.
+ */
+ ord = ts->thread_id % cpumask_weight(cpu_online_mask);
+#if 0
+ pr_debug(">>>>>>>>>>>>>>>>>>>> Generated ord: %d from"
+ " thread_id: %d\n", ord, ts->thread_id);
+#endif
+ for_each_online_cpu(cpu) {
+ if (ord-- == 0) {
+ cpumask_set_cpu(cpu, conn->conn_cpumask);
+ return;
+ }
+ }
+ /*
+ * This should never be reached..
+ */
+ dump_stack();
+ cpumask_setall(conn->conn_cpumask);
+}
+
+static inline void iscsit_thread_check_cpumask(
+ struct iscsi_conn *conn,
+ struct task_struct *p,
+ int mode)
+{
+ char buf[128];
+ /*
+ * mode == 1 signals iscsi_target_tx_thread() usage.
+ * mode == 0 signals iscsi_target_rx_thread() usage.
+ */
+ if (mode == 1) {
+ if (!conn->conn_tx_reset_cpumask)
+ return;
+ conn->conn_tx_reset_cpumask = 0;
+ } else {
+ if (!conn->conn_rx_reset_cpumask)
+ return;
+ conn->conn_rx_reset_cpumask = 0;
+ }
+ /*
+ * Update the CPU mask for this single kthread so that
+ * both TX and RX kthreads are scheduled to run on the
+ * same CPU.
+ */
+ memset(buf, 0, 128);
+ cpumask_scnprintf(buf, 128, conn->conn_cpumask);
+#if 0
+ pr_debug(">>>>>>>>>>>>>> Calling set_cpus_allowed_ptr():"
+ " %s for %s\n", buf, p->comm);
+#endif
+ set_cpus_allowed_ptr(p, conn->conn_cpumask);
+}
+
+#else
+
+void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
+{
+ return;
+}
+
+#define iscsit_thread_check_cpumask(X, Y, Z) ({})
+#endif /* CONFIG_SMP */
+
+int iscsi_target_tx_thread(void *arg)
+{
+ u8 state;
+ int eodr = 0;
+ int ret = 0;
+ int sent_status = 0;
+ int use_misc = 0;
+ int map_sg = 0;
+ struct iscsi_cmd *cmd = NULL;
+ struct iscsi_conn *conn;
+ struct iscsi_queue_req *qr = NULL;
+ struct iscsi_thread_set *ts = arg;
+ /*
+ * Allow ourselves to be interrupted by SIGINT so that a
+ * connection recovery / failure event can be triggered externally.
+ */
+ allow_signal(SIGINT);
+
+restart:
+ conn = iscsi_tx_thread_pre_handler(ts);
+ if (!conn)
+ goto out;
+
+ eodr = map_sg = ret = sent_status = use_misc = 0;
+
+ while (!kthread_should_stop()) {
+ /*
+ * Ensure that both TX and RX per connection kthreads
+ * are scheduled to run on the same CPU.
+ */
+ iscsit_thread_check_cpumask(conn, current, 1);
+
+ wait_event_interruptible(conn->queues_wq,
+ !iscsit_conn_all_queues_empty(conn) ||
+ ts->status == ISCSI_THREAD_SET_RESET);
+
+ if ((ts->status == ISCSI_THREAD_SET_RESET) ||
+ signal_pending(current))
+ goto transport_err;
+
+get_immediate:
+ qr = iscsit_get_cmd_from_immediate_queue(conn);
+ if (qr) {
+ atomic_set(&conn->check_immediate_queue, 0);
+ cmd = qr->cmd;
+ state = qr->state;
+ kmem_cache_free(lio_qr_cache, qr);
+
+ spin_lock_bh(&cmd->istate_lock);
+ switch (state) {
+ case ISTATE_SEND_R2T:
+ spin_unlock_bh(&cmd->istate_lock);
+ ret = iscsit_send_r2t(cmd, conn);
+ break;
+ case ISTATE_REMOVE:
+ spin_unlock_bh(&cmd->istate_lock);
+
+ if (cmd->data_direction == DMA_TO_DEVICE)
+ iscsit_stop_dataout_timer(cmd);
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_del(&cmd->i_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ iscsit_free_cmd(cmd);
+ goto get_immediate;
+ case ISTATE_SEND_NOPIN_WANT_RESPONSE:
+ spin_unlock_bh(&cmd->istate_lock);
+ iscsit_mod_nopin_response_timer(conn);
+ ret = iscsit_send_unsolicited_nopin(cmd,
+ conn, 1);
+ break;
+ case ISTATE_SEND_NOPIN_NO_RESPONSE:
+ spin_unlock_bh(&cmd->istate_lock);
+ ret = iscsit_send_unsolicited_nopin(cmd,
+ conn, 0);
+ break;
+ default:
+ pr_err("Unknown Opcode: 0x%02x ITT:"
+ " 0x%08x, i_state: %d on CID: %hu\n",
+ cmd->iscsi_opcode, cmd->init_task_tag, state,
+ conn->cid);
+ spin_unlock_bh(&cmd->istate_lock);
+ goto transport_err;
+ }
+ if (ret < 0) {
+ conn->tx_immediate_queue = 0;
+ goto transport_err;
+ }
+
+ if (iscsit_send_tx_data(cmd, conn, 1) < 0) {
+ conn->tx_immediate_queue = 0;
+ iscsit_tx_thread_wait_for_tcp(conn);
+ goto transport_err;
+ }
+
+ spin_lock_bh(&cmd->istate_lock);
+ switch (state) {
+ case ISTATE_SEND_R2T:
+ spin_unlock_bh(&cmd->istate_lock);
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ iscsit_start_dataout_timer(cmd, conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ break;
+ case ISTATE_SEND_NOPIN_WANT_RESPONSE:
+ cmd->i_state = ISTATE_SENT_NOPIN_WANT_RESPONSE;
+ spin_unlock_bh(&cmd->istate_lock);
+ break;
+ case ISTATE_SEND_NOPIN_NO_RESPONSE:
+ cmd->i_state = ISTATE_SENT_STATUS;
+ spin_unlock_bh(&cmd->istate_lock);
+ break;
+ default:
+ pr_err("Unknown Opcode: 0x%02x ITT:"
+ " 0x%08x, i_state: %d on CID: %hu\n",
+ cmd->iscsi_opcode, cmd->init_task_tag,
+ state, conn->cid);
+ spin_unlock_bh(&cmd->istate_lock);
+ goto transport_err;
+ }
+ goto get_immediate;
+ } else
+ conn->tx_immediate_queue = 0;
+
+get_response:
+ qr = iscsit_get_cmd_from_response_queue(conn);
+ if (qr) {
+ cmd = qr->cmd;
+ state = qr->state;
+ kmem_cache_free(lio_qr_cache, qr);
+
+ spin_lock_bh(&cmd->istate_lock);
+check_rsp_state:
+ switch (state) {
+ case ISTATE_SEND_DATAIN:
+ spin_unlock_bh(&cmd->istate_lock);
+ ret = iscsit_send_data_in(cmd, conn,
+ &eodr);
+ map_sg = 1;
+ break;
+ case ISTATE_SEND_STATUS:
+ case ISTATE_SEND_STATUS_RECOVERY:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_status(cmd, conn);
+ break;
+ case ISTATE_SEND_LOGOUTRSP:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_logout_response(cmd, conn);
+ break;
+ case ISTATE_SEND_ASYNCMSG:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_conn_drop_async_message(
+ cmd, conn);
+ break;
+ case ISTATE_SEND_NOPIN:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_nopin_response(cmd, conn);
+ break;
+ case ISTATE_SEND_REJECT:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_reject(cmd, conn);
+ break;
+ case ISTATE_SEND_TASKMGTRSP:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_task_mgt_rsp(cmd, conn);
+ if (ret != 0)
+ break;
+ ret = iscsit_tmr_post_handler(cmd, conn);
+ if (ret != 0)
+ iscsit_fall_back_to_erl0(conn->sess);
+ break;
+ case ISTATE_SEND_TEXTRSP:
+ spin_unlock_bh(&cmd->istate_lock);
+ use_misc = 1;
+ ret = iscsit_send_text_rsp(cmd, conn);
+ break;
+ default:
+ pr_err("Unknown Opcode: 0x%02x ITT:"
+ " 0x%08x, i_state: %d on CID: %hu\n",
+ cmd->iscsi_opcode, cmd->init_task_tag,
+ state, conn->cid);
+ spin_unlock_bh(&cmd->istate_lock);
+ goto transport_err;
+ }
+ if (ret < 0) {
+ conn->tx_response_queue = 0;
+ goto transport_err;
+ }
+
+ if (map_sg && !conn->conn_ops->IFMarker) {
+ if (iscsit_fe_sendpage_sg(cmd, conn) < 0) {
+ conn->tx_response_queue = 0;
+ iscsit_tx_thread_wait_for_tcp(conn);
+ iscsit_unmap_iovec(cmd);
+ goto transport_err;
+ }
+ } else {
+ if (iscsit_send_tx_data(cmd, conn, use_misc) < 0) {
+ conn->tx_response_queue = 0;
+ iscsit_tx_thread_wait_for_tcp(conn);
+ iscsit_unmap_iovec(cmd);
+ goto transport_err;
+ }
+ }
+ map_sg = 0;
+ iscsit_unmap_iovec(cmd);
+
+ spin_lock_bh(&cmd->istate_lock);
+ switch (state) {
+ case ISTATE_SEND_DATAIN:
+ if (!eodr)
+ goto check_rsp_state;
+
+ if (eodr == 1) {
+ cmd->i_state = ISTATE_SENT_LAST_DATAIN;
+ sent_status = 1;
+ eodr = use_misc = 0;
+ } else if (eodr == 2) {
+ cmd->i_state = state =
+ ISTATE_SEND_STATUS;
+ sent_status = 0;
+ eodr = use_misc = 0;
+ goto check_rsp_state;
+ }
+ break;
+ case ISTATE_SEND_STATUS:
+ use_misc = 0;
+ sent_status = 1;
+ break;
+ case ISTATE_SEND_ASYNCMSG:
+ case ISTATE_SEND_NOPIN:
+ case ISTATE_SEND_STATUS_RECOVERY:
+ case ISTATE_SEND_TEXTRSP:
+ use_misc = 0;
+ sent_status = 1;
+ break;
+ case ISTATE_SEND_REJECT:
+ use_misc = 0;
+ if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) {
+ cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN;
+ spin_unlock_bh(&cmd->istate_lock);
+ complete(&cmd->reject_comp);
+ goto transport_err;
+ }
+ complete(&cmd->reject_comp);
+ break;
+ case ISTATE_SEND_TASKMGTRSP:
+ use_misc = 0;
+ sent_status = 1;
+ break;
+ case ISTATE_SEND_LOGOUTRSP:
+ spin_unlock_bh(&cmd->istate_lock);
+ if (!iscsit_logout_post_handler(cmd, conn))
+ goto restart;
+ spin_lock_bh(&cmd->istate_lock);
+ use_misc = 0;
+ sent_status = 1;
+ break;
+ default:
+ pr_err("Unknown Opcode: 0x%02x ITT:"
+ " 0x%08x, i_state: %d on CID: %hu\n",
+ cmd->iscsi_opcode, cmd->init_task_tag,
+ cmd->i_state, conn->cid);
+ spin_unlock_bh(&cmd->istate_lock);
+ goto transport_err;
+ }
+
+ if (sent_status) {
+ cmd->i_state = ISTATE_SENT_STATUS;
+ sent_status = 0;
+ }
+ spin_unlock_bh(&cmd->istate_lock);
+
+ if (atomic_read(&conn->check_immediate_queue))
+ goto get_immediate;
+
+ goto get_response;
+ } else
+ conn->tx_response_queue = 0;
+ }
+
+transport_err:
+ iscsit_take_action_for_connection_exit(conn);
+ goto restart;
+out:
+ return 0;
+}
+
+int iscsi_target_rx_thread(void *arg)
+{
+ int ret;
+ u8 buffer[ISCSI_HDR_LEN], opcode;
+ u32 checksum = 0, digest = 0;
+ struct iscsi_conn *conn = NULL;
+ struct iscsi_thread_set *ts = arg;
+ struct kvec iov;
+ /*
+ * Allow ourselves to be interrupted by SIGINT so that a
+ * connection recovery / failure event can be triggered externally.
+ */
+ allow_signal(SIGINT);
+
+restart:
+ conn = iscsi_rx_thread_pre_handler(ts);
+ if (!conn)
+ goto out;
+
+ while (!kthread_should_stop()) {
+ /*
+ * Ensure that both TX and RX per connection kthreads
+ * are scheduled to run on the same CPU.
+ */
+ iscsit_thread_check_cpumask(conn, current, 0);
+
+ memset(buffer, 0, ISCSI_HDR_LEN);
+ memset(&iov, 0, sizeof(struct kvec));
+
+ iov.iov_base = buffer;
+ iov.iov_len = ISCSI_HDR_LEN;
+
+ ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN);
+ if (ret != ISCSI_HDR_LEN) {
+ iscsit_rx_thread_wait_for_tcp(conn);
+ goto transport_err;
+ }
+
+ /*
+ * Set conn->bad_hdr for use with REJECT PDUs.
+ */
+ memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN);
+
+ if (conn->conn_ops->HeaderDigest) {
+ iov.iov_base = &digest;
+ iov.iov_len = ISCSI_CRC_LEN;
+
+ ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN);
+ if (ret != ISCSI_CRC_LEN) {
+ iscsit_rx_thread_wait_for_tcp(conn);
+ goto transport_err;
+ }
+
+ iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
+ buffer, ISCSI_HDR_LEN,
+ 0, NULL, (u8 *)&checksum);
+
+ if (digest != checksum) {
+ pr_err("HeaderDigest CRC32C failed,"
+ " received 0x%08x, computed 0x%08x\n",
+ digest, checksum);
+ /*
+ * Set the PDU to 0xff so it will intentionally
+ * hit default in the switch below.
+ */
+ memset(buffer, 0xff, ISCSI_HDR_LEN);
+ spin_lock_bh(&conn->sess->session_stats_lock);
+ conn->sess->conn_digest_errors++;
+ spin_unlock_bh(&conn->sess->session_stats_lock);
+ } else {
+ pr_debug("Got HeaderDigest CRC32C"
+ " 0x%08x\n", checksum);
+ }
+ }
+
+ if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)
+ goto transport_err;
+
+ opcode = buffer[0] & ISCSI_OPCODE_MASK;
+
+ if (conn->sess->sess_ops->SessionType &&
+ ((!(opcode & ISCSI_OP_TEXT)) ||
+ (!(opcode & ISCSI_OP_LOGOUT)))) {
+ pr_err("Received illegal iSCSI Opcode: 0x%02x"
+ " while in Discovery Session, rejecting.\n", opcode);
+ iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
+ buffer, conn);
+ goto transport_err;
+ }
+
+ switch (opcode) {
+ case ISCSI_OP_SCSI_CMD:
+ if (iscsit_handle_scsi_cmd(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_SCSI_DATA_OUT:
+ if (iscsit_handle_data_out(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_NOOP_OUT:
+ if (iscsit_handle_nop_out(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_SCSI_TMFUNC:
+ if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_TEXT:
+ if (iscsit_handle_text_cmd(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_LOGOUT:
+ ret = iscsit_handle_logout_cmd(conn, buffer);
+ if (ret > 0) {
+ wait_for_completion_timeout(&conn->conn_logout_comp,
+ SECONDS_FOR_LOGOUT_COMP * HZ);
+ goto transport_err;
+ } else if (ret < 0)
+ goto transport_err;
+ break;
+ case ISCSI_OP_SNACK:
+ if (iscsit_handle_snack(conn, buffer) < 0)
+ goto transport_err;
+ break;
+ default:
+ pr_err("Got unknown iSCSI OpCode: 0x%02x\n",
+ opcode);
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Cannot recover from unknown"
+ " opcode while ERL=0, closing iSCSI connection"
+ ".\n");
+ goto transport_err;
+ }
+ if (!conn->conn_ops->OFMarker) {
+ pr_err("Unable to recover from unknown"
+ " opcode while OFMarker=No, closing iSCSI"
+ " connection.\n");
+ goto transport_err;
+ }
+ if (iscsit_recover_from_unknown_opcode(conn) < 0) {
+ pr_err("Unable to recover from unknown"
+ " opcode, closing iSCSI connection.\n");
+ goto transport_err;
+ }
+ break;
+ }
+ }
+
+transport_err:
+ if (!signal_pending(current))
+ atomic_set(&conn->transport_failed, 1);
+ iscsit_take_action_for_connection_exit(conn);
+ goto restart;
+out:
+ return 0;
+}
+
+static void iscsit_release_commands_from_conn(struct iscsi_conn *conn)
+{
+ struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL;
+ struct iscsi_session *sess = conn->sess;
+ /*
+ * We expect this function to only ever be called from either RX or TX
+ * thread context via iscsit_close_connection() once the other context
+ * has been reset -> returned sleeping pre-handler state.
+ */
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_list) {
+
+ list_del(&cmd->i_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ iscsit_increment_maxcmdsn(cmd, sess);
+
+ iscsit_free_cmd(cmd);
+
+ spin_lock_bh(&conn->cmd_lock);
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+}
+
+static void iscsit_stop_timers_for_cmds(
+ struct iscsi_conn *conn)
+{
+ struct iscsi_cmd *cmd;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ if (cmd->data_direction == DMA_TO_DEVICE)
+ iscsit_stop_dataout_timer(cmd);
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+}
+
+int iscsit_close_connection(
+ struct iscsi_conn *conn)
+{
+ int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT);
+ struct iscsi_session *sess = conn->sess;
+
+ pr_debug("Closing iSCSI connection CID %hu on SID:"
+ " %u\n", conn->cid, sess->sid);
+ /*
+ * Always up conn_logout_comp just in case the RX Thread is sleeping
+ * and the logout response never got sent because the connection
+ * failed.
+ */
+ complete(&conn->conn_logout_comp);
+
+ iscsi_release_thread_set(conn);
+
+ iscsit_stop_timers_for_cmds(conn);
+ iscsit_stop_nopin_response_timer(conn);
+ iscsit_stop_nopin_timer(conn);
+ iscsit_free_queue_reqs_for_conn(conn);
+
+ /*
+ * During Connection recovery drop unacknowledged out of order
+ * commands for this connection, and prepare the other commands
+ * for realligence.
+ *
+ * During normal operation clear the out of order commands (but
+ * do not free the struct iscsi_ooo_cmdsn's) and release all
+ * struct iscsi_cmds.
+ */
+ if (atomic_read(&conn->connection_recovery)) {
+ iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn);
+ iscsit_prepare_cmds_for_realligance(conn);
+ } else {
+ iscsit_clear_ooo_cmdsns_for_conn(conn);
+ iscsit_release_commands_from_conn(conn);
+ }
+
+ /*
+ * Handle decrementing session or connection usage count if
+ * a logout response was not able to be sent because the
+ * connection failed. Fall back to Session Recovery here.
+ */
+ if (atomic_read(&conn->conn_logout_remove)) {
+ if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) {
+ iscsit_dec_conn_usage_count(conn);
+ iscsit_dec_session_usage_count(sess);
+ }
+ if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION)
+ iscsit_dec_conn_usage_count(conn);
+
+ atomic_set(&conn->conn_logout_remove, 0);
+ atomic_set(&sess->session_reinstatement, 0);
+ atomic_set(&sess->session_fall_back_to_erl0, 1);
+ }
+
+ spin_lock_bh(&sess->conn_lock);
+ list_del(&conn->conn_list);
+
+ /*
+ * Attempt to let the Initiator know this connection failed by
+ * sending an Connection Dropped Async Message on another
+ * active connection.
+ */
+ if (atomic_read(&conn->connection_recovery))
+ iscsit_build_conn_drop_async_message(conn);
+
+ spin_unlock_bh(&sess->conn_lock);
+
+ /*
+ * If connection reinstatement is being performed on this connection,
+ * up the connection reinstatement semaphore that is being blocked on
+ * in iscsit_cause_connection_reinstatement().
+ */
+ spin_lock_bh(&conn->state_lock);
+ if (atomic_read(&conn->sleep_on_conn_wait_comp)) {
+ spin_unlock_bh(&conn->state_lock);
+ complete(&conn->conn_wait_comp);
+ wait_for_completion(&conn->conn_post_wait_comp);
+ spin_lock_bh(&conn->state_lock);
+ }
+
+ /*
+ * If connection reinstatement is being performed on this connection
+ * by receiving a REMOVECONNFORRECOVERY logout request, up the
+ * connection wait rcfr semaphore that is being blocked on
+ * an iscsit_connection_reinstatement_rcfr().
+ */
+ if (atomic_read(&conn->connection_wait_rcfr)) {
+ spin_unlock_bh(&conn->state_lock);
+ complete(&conn->conn_wait_rcfr_comp);
+ wait_for_completion(&conn->conn_post_wait_comp);
+ spin_lock_bh(&conn->state_lock);
+ }
+ atomic_set(&conn->connection_reinstatement, 1);
+ spin_unlock_bh(&conn->state_lock);
+
+ /*
+ * If any other processes are accessing this connection pointer we
+ * must wait until they have completed.
+ */
+ iscsit_check_conn_usage_count(conn);
+
+ if (conn->conn_rx_hash.tfm)
+ crypto_free_hash(conn->conn_rx_hash.tfm);
+ if (conn->conn_tx_hash.tfm)
+ crypto_free_hash(conn->conn_tx_hash.tfm);
+
+ if (conn->conn_cpumask)
+ free_cpumask_var(conn->conn_cpumask);
+
+ kfree(conn->conn_ops);
+ conn->conn_ops = NULL;
+
+ if (conn->sock)
+ sock_release(conn->sock);
+ conn->thread_set = NULL;
+
+ pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
+ conn->conn_state = TARG_CONN_STATE_FREE;
+ kfree(conn);
+
+ spin_lock_bh(&sess->conn_lock);
+ atomic_dec(&sess->nconn);
+ pr_debug("Decremented iSCSI connection count to %hu from node:"
+ " %s\n", atomic_read(&sess->nconn),
+ sess->sess_ops->InitiatorName);
+ /*
+ * Make sure that if one connection fails in an non ERL=2 iSCSI
+ * Session that they all fail.
+ */
+ if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout &&
+ !atomic_read(&sess->session_logout))
+ atomic_set(&sess->session_fall_back_to_erl0, 1);
+
+ /*
+ * If this was not the last connection in the session, and we are
+ * performing session reinstatement or falling back to ERL=0, call
+ * iscsit_stop_session() without sleeping to shutdown the other
+ * active connections.
+ */
+ if (atomic_read(&sess->nconn)) {
+ if (!atomic_read(&sess->session_reinstatement) &&
+ !atomic_read(&sess->session_fall_back_to_erl0)) {
+ spin_unlock_bh(&sess->conn_lock);
+ return 0;
+ }
+ if (!atomic_read(&sess->session_stop_active)) {
+ atomic_set(&sess->session_stop_active, 1);
+ spin_unlock_bh(&sess->conn_lock);
+ iscsit_stop_session(sess, 0, 0);
+ return 0;
+ }
+ spin_unlock_bh(&sess->conn_lock);
+ return 0;
+ }
+
+ /*
+ * If this was the last connection in the session and one of the
+ * following is occurring:
+ *
+ * Session Reinstatement is not being performed, and are falling back
+ * to ERL=0 call iscsit_close_session().
+ *
+ * Session Logout was requested. iscsit_close_session() will be called
+ * elsewhere.
+ *
+ * Session Continuation is not being performed, start the Time2Retain
+ * handler and check if sleep_on_sess_wait_sem is active.
+ */
+ if (!atomic_read(&sess->session_reinstatement) &&
+ atomic_read(&sess->session_fall_back_to_erl0)) {
+ spin_unlock_bh(&sess->conn_lock);
+ target_put_session(sess->se_sess);
+
+ return 0;
+ } else if (atomic_read(&sess->session_logout)) {
+ pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
+ sess->session_state = TARG_SESS_STATE_FREE;
+ spin_unlock_bh(&sess->conn_lock);
+
+ if (atomic_read(&sess->sleep_on_sess_wait_comp))
+ complete(&sess->session_wait_comp);
+
+ return 0;
+ } else {
+ pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
+ sess->session_state = TARG_SESS_STATE_FAILED;
+
+ if (!atomic_read(&sess->session_continuation)) {
+ spin_unlock_bh(&sess->conn_lock);
+ iscsit_start_time2retain_handler(sess);
+ } else
+ spin_unlock_bh(&sess->conn_lock);
+
+ if (atomic_read(&sess->sleep_on_sess_wait_comp))
+ complete(&sess->session_wait_comp);
+
+ return 0;
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ return 0;
+}
+
+int iscsit_close_session(struct iscsi_session *sess)
+{
+ struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+
+ if (atomic_read(&sess->nconn)) {
+ pr_err("%d connection(s) still exist for iSCSI session"
+ " to %s\n", atomic_read(&sess->nconn),
+ sess->sess_ops->InitiatorName);
+ BUG();
+ }
+
+ spin_lock_bh(&se_tpg->session_lock);
+ atomic_set(&sess->session_logout, 1);
+ atomic_set(&sess->session_reinstatement, 1);
+ iscsit_stop_time2retain_timer(sess);
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ /*
+ * transport_deregister_session_configfs() will clear the
+ * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
+ * can be setting it again with __transport_register_session() in
+ * iscsi_post_login_handler() again after the iscsit_stop_session()
+ * completes in iscsi_np context.
+ */
+ transport_deregister_session_configfs(sess->se_sess);
+
+ /*
+ * If any other processes are accessing this session pointer we must
+ * wait until they have completed. If we are in an interrupt (the
+ * time2retain handler) and contain and active session usage count we
+ * restart the timer and exit.
+ */
+ if (!in_interrupt()) {
+ if (iscsit_check_session_usage_count(sess) == 1)
+ iscsit_stop_session(sess, 1, 1);
+ } else {
+ if (iscsit_check_session_usage_count(sess) == 2) {
+ atomic_set(&sess->session_logout, 0);
+ iscsit_start_time2retain_handler(sess);
+ return 0;
+ }
+ }
+
+ transport_deregister_session(sess->se_sess);
+
+ if (sess->sess_ops->ErrorRecoveryLevel == 2)
+ iscsit_free_connection_recovery_entires(sess);
+
+ iscsit_free_all_ooo_cmdsns(sess);
+
+ spin_lock_bh(&se_tpg->session_lock);
+ pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
+ sess->session_state = TARG_SESS_STATE_FREE;
+ pr_debug("Released iSCSI session from node: %s\n",
+ sess->sess_ops->InitiatorName);
+ tpg->nsessions--;
+ if (tpg->tpg_tiqn)
+ tpg->tpg_tiqn->tiqn_nsessions--;
+
+ pr_debug("Decremented number of active iSCSI Sessions on"
+ " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions);
+
+ spin_lock(&sess_idr_lock);
+ idr_remove(&sess_idr, sess->session_index);
+ spin_unlock(&sess_idr_lock);
+
+ kfree(sess->sess_ops);
+ sess->sess_ops = NULL;
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ kfree(sess);
+ return 0;
+}
+
+static void iscsit_logout_post_handler_closesession(
+ struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+
+ iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD);
+ iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD);
+
+ atomic_set(&conn->conn_logout_remove, 0);
+ complete(&conn->conn_logout_comp);
+
+ iscsit_dec_conn_usage_count(conn);
+ iscsit_stop_session(sess, 1, 1);
+ iscsit_dec_session_usage_count(sess);
+ target_put_session(sess->se_sess);
+}
+
+static void iscsit_logout_post_handler_samecid(
+ struct iscsi_conn *conn)
+{
+ iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD);
+ iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD);
+
+ atomic_set(&conn->conn_logout_remove, 0);
+ complete(&conn->conn_logout_comp);
+
+ iscsit_cause_connection_reinstatement(conn, 1);
+ iscsit_dec_conn_usage_count(conn);
+}
+
+static void iscsit_logout_post_handler_diffcid(
+ struct iscsi_conn *conn,
+ u16 cid)
+{
+ struct iscsi_conn *l_conn;
+ struct iscsi_session *sess = conn->sess;
+ bool conn_found = false;
+
+ if (!sess)
+ return;
+
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) {
+ if (l_conn->cid == cid) {
+ iscsit_inc_conn_usage_count(l_conn);
+ conn_found = true;
+ break;
+ }
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ if (!conn_found)
+ return;
+
+ if (l_conn->sock)
+ l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN);
+
+ spin_lock_bh(&l_conn->state_lock);
+ pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
+ l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT;
+ spin_unlock_bh(&l_conn->state_lock);
+
+ iscsit_cause_connection_reinstatement(l_conn, 1);
+ iscsit_dec_conn_usage_count(l_conn);
+}
+
+/*
+ * Return of 0 causes the TX thread to restart.
+ */
+static int iscsit_logout_post_handler(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ int ret = 0;
+
+ switch (cmd->logout_reason) {
+ case ISCSI_LOGOUT_REASON_CLOSE_SESSION:
+ switch (cmd->logout_response) {
+ case ISCSI_LOGOUT_SUCCESS:
+ case ISCSI_LOGOUT_CLEANUP_FAILED:
+ default:
+ iscsit_logout_post_handler_closesession(conn);
+ break;
+ }
+ ret = 0;
+ break;
+ case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
+ if (conn->cid == cmd->logout_cid) {
+ switch (cmd->logout_response) {
+ case ISCSI_LOGOUT_SUCCESS:
+ case ISCSI_LOGOUT_CLEANUP_FAILED:
+ default:
+ iscsit_logout_post_handler_samecid(conn);
+ break;
+ }
+ ret = 0;
+ } else {
+ switch (cmd->logout_response) {
+ case ISCSI_LOGOUT_SUCCESS:
+ iscsit_logout_post_handler_diffcid(conn,
+ cmd->logout_cid);
+ break;
+ case ISCSI_LOGOUT_CID_NOT_FOUND:
+ case ISCSI_LOGOUT_CLEANUP_FAILED:
+ default:
+ break;
+ }
+ ret = 1;
+ }
+ break;
+ case ISCSI_LOGOUT_REASON_RECOVERY:
+ switch (cmd->logout_response) {
+ case ISCSI_LOGOUT_SUCCESS:
+ case ISCSI_LOGOUT_CID_NOT_FOUND:
+ case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED:
+ case ISCSI_LOGOUT_CLEANUP_FAILED:
+ default:
+ break;
+ }
+ ret = 1;
+ break;
+ default:
+ break;
+
+ }
+ return ret;
+}
+
+void iscsit_fail_session(struct iscsi_session *sess)
+{
+ struct iscsi_conn *conn;
+
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
+ pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
+ conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT;
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
+ sess->session_state = TARG_SESS_STATE_FAILED;
+}
+
+int iscsit_free_session(struct iscsi_session *sess)
+{
+ u16 conn_count = atomic_read(&sess->nconn);
+ struct iscsi_conn *conn, *conn_tmp = NULL;
+ int is_last;
+
+ spin_lock_bh(&sess->conn_lock);
+ atomic_set(&sess->sleep_on_sess_wait_comp, 1);
+
+ list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list,
+ conn_list) {
+ if (conn_count == 0)
+ break;
+
+ if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) {
+ is_last = 1;
+ } else {
+ iscsit_inc_conn_usage_count(conn_tmp);
+ is_last = 0;
+ }
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_unlock_bh(&sess->conn_lock);
+ iscsit_cause_connection_reinstatement(conn, 1);
+ spin_lock_bh(&sess->conn_lock);
+
+ iscsit_dec_conn_usage_count(conn);
+ if (is_last == 0)
+ iscsit_dec_conn_usage_count(conn_tmp);
+
+ conn_count--;
+ }
+
+ if (atomic_read(&sess->nconn)) {
+ spin_unlock_bh(&sess->conn_lock);
+ wait_for_completion(&sess->session_wait_comp);
+ } else
+ spin_unlock_bh(&sess->conn_lock);
+
+ target_put_session(sess->se_sess);
+ return 0;
+}
+
+void iscsit_stop_session(
+ struct iscsi_session *sess,
+ int session_sleep,
+ int connection_sleep)
+{
+ u16 conn_count = atomic_read(&sess->nconn);
+ struct iscsi_conn *conn, *conn_tmp = NULL;
+ int is_last;
+
+ spin_lock_bh(&sess->conn_lock);
+ if (session_sleep)
+ atomic_set(&sess->sleep_on_sess_wait_comp, 1);
+
+ if (connection_sleep) {
+ list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list,
+ conn_list) {
+ if (conn_count == 0)
+ break;
+
+ if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) {
+ is_last = 1;
+ } else {
+ iscsit_inc_conn_usage_count(conn_tmp);
+ is_last = 0;
+ }
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_unlock_bh(&sess->conn_lock);
+ iscsit_cause_connection_reinstatement(conn, 1);
+ spin_lock_bh(&sess->conn_lock);
+
+ iscsit_dec_conn_usage_count(conn);
+ if (is_last == 0)
+ iscsit_dec_conn_usage_count(conn_tmp);
+ conn_count--;
+ }
+ } else {
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
+ iscsit_cause_connection_reinstatement(conn, 0);
+ }
+
+ if (session_sleep && atomic_read(&sess->nconn)) {
+ spin_unlock_bh(&sess->conn_lock);
+ wait_for_completion(&sess->session_wait_comp);
+ } else
+ spin_unlock_bh(&sess->conn_lock);
+}
+
+int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force)
+{
+ struct iscsi_session *sess;
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+ struct se_session *se_sess, *se_sess_tmp;
+ int session_count = 0;
+
+ spin_lock_bh(&se_tpg->session_lock);
+ if (tpg->nsessions && !force) {
+ spin_unlock_bh(&se_tpg->session_lock);
+ return -1;
+ }
+
+ list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
+ sess_list) {
+ sess = (struct iscsi_session *)se_sess->fabric_sess_ptr;
+
+ spin_lock(&sess->conn_lock);
+ if (atomic_read(&sess->session_fall_back_to_erl0) ||
+ atomic_read(&sess->session_logout) ||
+ (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
+ spin_unlock(&sess->conn_lock);
+ continue;
+ }
+ atomic_set(&sess->session_reinstatement, 1);
+ spin_unlock(&sess->conn_lock);
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ iscsit_free_session(sess);
+ spin_lock_bh(&se_tpg->session_lock);
+
+ session_count++;
+ }
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ pr_debug("Released %d iSCSI Session(s) from Target Portal"
+ " Group: %hu\n", session_count, tpg->tpgt);
+ return 0;
+}
+
+MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
+MODULE_VERSION("4.1.x");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(iscsi_target_init_module);
+module_exit(iscsi_target_cleanup_module);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.h
new file mode 100644
index 0000000..5db2dde
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target.h
@@ -0,0 +1,42 @@
+#ifndef ISCSI_TARGET_H
+#define ISCSI_TARGET_H
+
+extern struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *);
+extern struct iscsi_tiqn *iscsit_get_tiqn(unsigned char *, int);
+extern void iscsit_put_tiqn_for_login(struct iscsi_tiqn *);
+extern struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *);
+extern void iscsit_del_tiqn(struct iscsi_tiqn *);
+extern int iscsit_access_np(struct iscsi_np *, struct iscsi_portal_group *);
+extern int iscsit_deaccess_np(struct iscsi_np *, struct iscsi_portal_group *);
+extern struct iscsi_np *iscsit_add_np(struct __kernel_sockaddr_storage *,
+ char *, int);
+extern int iscsit_reset_np_thread(struct iscsi_np *, struct iscsi_tpg_np *,
+ struct iscsi_portal_group *);
+extern int iscsit_del_np(struct iscsi_np *);
+extern int iscsit_add_reject_from_cmd(u8, int, int, unsigned char *, struct iscsi_cmd *);
+extern int iscsit_logout_closesession(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_logout_closeconnection(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_send_async_msg(struct iscsi_conn *, u16, u8, u8);
+extern int iscsit_send_r2t(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_build_r2ts_for_cmd(struct iscsi_cmd *, struct iscsi_conn *, int);
+extern void iscsit_thread_get_cpumask(struct iscsi_conn *);
+extern int iscsi_target_tx_thread(void *);
+extern int iscsi_target_rx_thread(void *);
+extern int iscsit_close_connection(struct iscsi_conn *);
+extern int iscsit_close_session(struct iscsi_session *);
+extern void iscsit_fail_session(struct iscsi_session *);
+extern int iscsit_free_session(struct iscsi_session *);
+extern void iscsit_stop_session(struct iscsi_session *, int, int);
+extern int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *, int);
+
+extern struct iscsit_global *iscsit_global;
+extern struct target_fabric_configfs *lio_target_fabric_configfs;
+
+extern struct kmem_cache *lio_dr_cache;
+extern struct kmem_cache *lio_ooo_cache;
+extern struct kmem_cache *lio_cmd_cache;
+extern struct kmem_cache *lio_qr_cache;
+extern struct kmem_cache *lio_r2t_cache;
+
+#endif /*** ISCSI_TARGET_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.c
new file mode 100644
index 0000000..cbb04f3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.c
@@ -0,0 +1,484 @@
+/*******************************************************************************
+ * This file houses the main functions for the iSCSI CHAP support
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <linux/scatterlist.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_nego.h"
+#include "iscsi_target_auth.h"
+
+static int chap_string_to_hex(unsigned char *dst, unsigned char *src, int len)
+{
+ int j = DIV_ROUND_UP(len, 2), rc;
+
+ rc = hex2bin(dst, src, j);
+ if (rc < 0)
+ pr_debug("CHAP string contains non hex digit symbols\n");
+
+ dst[j] = '\0';
+ return j;
+}
+
+static void chap_binaryhex_to_asciihex(char *dst, char *src, int src_len)
+{
+ int i;
+
+ for (i = 0; i < src_len; i++) {
+ sprintf(&dst[i*2], "%02x", (int) src[i] & 0xff);
+ }
+}
+
+static void chap_set_random(char *data, int length)
+{
+ long r;
+ unsigned n;
+
+ while (length > 0) {
+ get_random_bytes(&r, sizeof(long));
+ r = r ^ (r >> 8);
+ r = r ^ (r >> 4);
+ n = r & 0x7;
+
+ get_random_bytes(&r, sizeof(long));
+ r = r ^ (r >> 8);
+ r = r ^ (r >> 5);
+ n = (n << 3) | (r & 0x7);
+
+ get_random_bytes(&r, sizeof(long));
+ r = r ^ (r >> 8);
+ r = r ^ (r >> 5);
+ n = (n << 2) | (r & 0x3);
+
+ *data++ = n;
+ length--;
+ }
+}
+
+static void chap_gen_challenge(
+ struct iscsi_conn *conn,
+ int caller,
+ char *c_str,
+ unsigned int *c_len)
+{
+ unsigned char challenge_asciihex[CHAP_CHALLENGE_LENGTH * 2 + 1];
+ struct iscsi_chap *chap = conn->auth_protocol;
+
+ memset(challenge_asciihex, 0, CHAP_CHALLENGE_LENGTH * 2 + 1);
+
+ chap_set_random(chap->challenge, CHAP_CHALLENGE_LENGTH);
+ chap_binaryhex_to_asciihex(challenge_asciihex, chap->challenge,
+ CHAP_CHALLENGE_LENGTH);
+ /*
+ * Set CHAP_C, and copy the generated challenge into c_str.
+ */
+ *c_len += sprintf(c_str + *c_len, "CHAP_C=0x%s", challenge_asciihex);
+ *c_len += 1;
+
+ pr_debug("[%s] Sending CHAP_C=0x%s\n\n", (caller) ? "server" : "client",
+ challenge_asciihex);
+}
+
+
+static struct iscsi_chap *chap_server_open(
+ struct iscsi_conn *conn,
+ struct iscsi_node_auth *auth,
+ const char *a_str,
+ char *aic_str,
+ unsigned int *aic_len)
+{
+ struct iscsi_chap *chap;
+
+ if (!(auth->naf_flags & NAF_USERID_SET) ||
+ !(auth->naf_flags & NAF_PASSWORD_SET)) {
+ pr_err("CHAP user or password not set for"
+ " Initiator ACL\n");
+ return NULL;
+ }
+
+ conn->auth_protocol = kzalloc(sizeof(struct iscsi_chap), GFP_KERNEL);
+ if (!conn->auth_protocol)
+ return NULL;
+
+ chap = conn->auth_protocol;
+ /*
+ * We only support MD5 MDA presently.
+ */
+ if (strncmp(a_str, "CHAP_A=5", 8)) {
+ pr_err("CHAP_A is not MD5.\n");
+ return NULL;
+ }
+ pr_debug("[server] Got CHAP_A=5\n");
+ /*
+ * Send back CHAP_A set to MD5.
+ */
+ *aic_len = sprintf(aic_str, "CHAP_A=5");
+ *aic_len += 1;
+ chap->digest_type = CHAP_DIGEST_MD5;
+ pr_debug("[server] Sending CHAP_A=%d\n", chap->digest_type);
+ /*
+ * Set Identifier.
+ */
+ chap->id = ISCSI_TPG_C(conn)->tpg_chap_id++;
+ *aic_len += sprintf(aic_str + *aic_len, "CHAP_I=%d", chap->id);
+ *aic_len += 1;
+ pr_debug("[server] Sending CHAP_I=%d\n", chap->id);
+ /*
+ * Generate Challenge.
+ */
+ chap_gen_challenge(conn, 1, aic_str, aic_len);
+
+ return chap;
+}
+
+static void chap_close(struct iscsi_conn *conn)
+{
+ kfree(conn->auth_protocol);
+ conn->auth_protocol = NULL;
+}
+
+static int chap_server_compute_md5(
+ struct iscsi_conn *conn,
+ struct iscsi_node_auth *auth,
+ char *nr_in_ptr,
+ char *nr_out_ptr,
+ unsigned int *nr_out_len)
+{
+ char *endptr;
+ unsigned long id;
+ unsigned char id_as_uchar;
+ unsigned char digest[MD5_SIGNATURE_SIZE];
+ unsigned char type, response[MD5_SIGNATURE_SIZE * 2 + 2];
+ unsigned char identifier[10], *challenge = NULL;
+ unsigned char *challenge_binhex = NULL;
+ unsigned char client_digest[MD5_SIGNATURE_SIZE];
+ unsigned char server_digest[MD5_SIGNATURE_SIZE];
+ unsigned char chap_n[MAX_CHAP_N_SIZE], chap_r[MAX_RESPONSE_LENGTH];
+ size_t compare_len;
+ struct iscsi_chap *chap = conn->auth_protocol;
+ struct crypto_hash *tfm;
+ struct hash_desc desc;
+ struct scatterlist sg;
+ int auth_ret = -1, ret, challenge_len;
+
+ memset(identifier, 0, 10);
+ memset(chap_n, 0, MAX_CHAP_N_SIZE);
+ memset(chap_r, 0, MAX_RESPONSE_LENGTH);
+ memset(digest, 0, MD5_SIGNATURE_SIZE);
+ memset(response, 0, MD5_SIGNATURE_SIZE * 2 + 2);
+ memset(client_digest, 0, MD5_SIGNATURE_SIZE);
+ memset(server_digest, 0, MD5_SIGNATURE_SIZE);
+
+ challenge = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
+ if (!challenge) {
+ pr_err("Unable to allocate challenge buffer\n");
+ goto out;
+ }
+
+ challenge_binhex = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
+ if (!challenge_binhex) {
+ pr_err("Unable to allocate challenge_binhex buffer\n");
+ goto out;
+ }
+ /*
+ * Extract CHAP_N.
+ */
+ if (extract_param(nr_in_ptr, "CHAP_N", MAX_CHAP_N_SIZE, chap_n,
+ &type) < 0) {
+ pr_err("Could not find CHAP_N.\n");
+ goto out;
+ }
+ if (type == HEX) {
+ pr_err("Could not find CHAP_N.\n");
+ goto out;
+ }
+
+ /* Include the terminating NULL in the compare */
+ compare_len = strlen(auth->userid) + 1;
+ if (strncmp(chap_n, auth->userid, compare_len) != 0) {
+ pr_err("CHAP_N values do not match!\n");
+ goto out;
+ }
+ pr_debug("[server] Got CHAP_N=%s\n", chap_n);
+ /*
+ * Extract CHAP_R.
+ */
+ if (extract_param(nr_in_ptr, "CHAP_R", MAX_RESPONSE_LENGTH, chap_r,
+ &type) < 0) {
+ pr_err("Could not find CHAP_R.\n");
+ goto out;
+ }
+ if (type != HEX) {
+ pr_err("Could not find CHAP_R.\n");
+ goto out;
+ }
+
+ pr_debug("[server] Got CHAP_R=%s\n", chap_r);
+ chap_string_to_hex(client_digest, chap_r, strlen(chap_r));
+
+ tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm)) {
+ pr_err("Unable to allocate struct crypto_hash\n");
+ goto out;
+ }
+ desc.tfm = tfm;
+ desc.flags = 0;
+
+ ret = crypto_hash_init(&desc);
+ if (ret < 0) {
+ pr_err("crypto_hash_init() failed\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ sg_init_one(&sg, &chap->id, 1);
+ ret = crypto_hash_update(&desc, &sg, 1);
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for id\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ sg_init_one(&sg, &auth->password, strlen(auth->password));
+ ret = crypto_hash_update(&desc, &sg, strlen(auth->password));
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for password\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ sg_init_one(&sg, chap->challenge, CHAP_CHALLENGE_LENGTH);
+ ret = crypto_hash_update(&desc, &sg, CHAP_CHALLENGE_LENGTH);
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for challenge\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ ret = crypto_hash_final(&desc, server_digest);
+ if (ret < 0) {
+ pr_err("crypto_hash_final() failed for server digest\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+ crypto_free_hash(tfm);
+
+ chap_binaryhex_to_asciihex(response, server_digest, MD5_SIGNATURE_SIZE);
+ pr_debug("[server] MD5 Server Digest: %s\n", response);
+
+ if (memcmp(server_digest, client_digest, MD5_SIGNATURE_SIZE) != 0) {
+ pr_debug("[server] MD5 Digests do not match!\n\n");
+ goto out;
+ } else
+ pr_debug("[server] MD5 Digests match, CHAP connetication"
+ " successful.\n\n");
+ /*
+ * One way authentication has succeeded, return now if mutual
+ * authentication is not enabled.
+ */
+ if (!auth->authenticate_target) {
+ kfree(challenge);
+ kfree(challenge_binhex);
+ return 0;
+ }
+ /*
+ * Get CHAP_I.
+ */
+ if (extract_param(nr_in_ptr, "CHAP_I", 10, identifier, &type) < 0) {
+ pr_err("Could not find CHAP_I.\n");
+ goto out;
+ }
+
+ if (type == HEX)
+ id = simple_strtoul(&identifier[2], &endptr, 0);
+ else
+ id = simple_strtoul(identifier, &endptr, 0);
+ if (id > 255) {
+ pr_err("chap identifier: %lu greater than 255\n", id);
+ goto out;
+ }
+ /*
+ * RFC 1994 says Identifier is no more than octet (8 bits).
+ */
+ pr_debug("[server] Got CHAP_I=%lu\n", id);
+ /*
+ * Get CHAP_C.
+ */
+ if (extract_param(nr_in_ptr, "CHAP_C", CHAP_CHALLENGE_STR_LEN,
+ challenge, &type) < 0) {
+ pr_err("Could not find CHAP_C.\n");
+ goto out;
+ }
+
+ if (type != HEX) {
+ pr_err("Could not find CHAP_C.\n");
+ goto out;
+ }
+ pr_debug("[server] Got CHAP_C=%s\n", challenge);
+ challenge_len = chap_string_to_hex(challenge_binhex, challenge,
+ strlen(challenge));
+ if (!challenge_len) {
+ pr_err("Unable to convert incoming challenge\n");
+ goto out;
+ }
+ /*
+ * During mutual authentication, the CHAP_C generated by the
+ * initiator must not match the original CHAP_C generated by
+ * the target.
+ */
+ if (!memcmp(challenge_binhex, chap->challenge, CHAP_CHALLENGE_LENGTH)) {
+ pr_err("initiator CHAP_C matches target CHAP_C, failing"
+ " login attempt\n");
+ goto out;
+ }
+ /*
+ * Generate CHAP_N and CHAP_R for mutual authentication.
+ */
+ tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm)) {
+ pr_err("Unable to allocate struct crypto_hash\n");
+ goto out;
+ }
+ desc.tfm = tfm;
+ desc.flags = 0;
+
+ ret = crypto_hash_init(&desc);
+ if (ret < 0) {
+ pr_err("crypto_hash_init() failed\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ /* To handle both endiannesses */
+ id_as_uchar = id;
+ sg_init_one(&sg, &id_as_uchar, 1);
+ ret = crypto_hash_update(&desc, &sg, 1);
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for id\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ sg_init_one(&sg, auth->password_mutual,
+ strlen(auth->password_mutual));
+ ret = crypto_hash_update(&desc, &sg, strlen(auth->password_mutual));
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for"
+ " password_mutual\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+ /*
+ * Convert received challenge to binary hex.
+ */
+ sg_init_one(&sg, challenge_binhex, challenge_len);
+ ret = crypto_hash_update(&desc, &sg, challenge_len);
+ if (ret < 0) {
+ pr_err("crypto_hash_update() failed for ma challenge\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+
+ ret = crypto_hash_final(&desc, digest);
+ if (ret < 0) {
+ pr_err("crypto_hash_final() failed for ma digest\n");
+ crypto_free_hash(tfm);
+ goto out;
+ }
+ crypto_free_hash(tfm);
+ /*
+ * Generate CHAP_N and CHAP_R.
+ */
+ *nr_out_len = sprintf(nr_out_ptr, "CHAP_N=%s", auth->userid_mutual);
+ *nr_out_len += 1;
+ pr_debug("[server] Sending CHAP_N=%s\n", auth->userid_mutual);
+ /*
+ * Convert response from binary hex to ascii hext.
+ */
+ chap_binaryhex_to_asciihex(response, digest, MD5_SIGNATURE_SIZE);
+ *nr_out_len += sprintf(nr_out_ptr + *nr_out_len, "CHAP_R=0x%s",
+ response);
+ *nr_out_len += 1;
+ pr_debug("[server] Sending CHAP_R=0x%s\n", response);
+ auth_ret = 0;
+out:
+ kfree(challenge);
+ kfree(challenge_binhex);
+ return auth_ret;
+}
+
+static int chap_got_response(
+ struct iscsi_conn *conn,
+ struct iscsi_node_auth *auth,
+ char *nr_in_ptr,
+ char *nr_out_ptr,
+ unsigned int *nr_out_len)
+{
+ struct iscsi_chap *chap = conn->auth_protocol;
+
+ switch (chap->digest_type) {
+ case CHAP_DIGEST_MD5:
+ if (chap_server_compute_md5(conn, auth, nr_in_ptr,
+ nr_out_ptr, nr_out_len) < 0)
+ return -1;
+ return 0;
+ default:
+ pr_err("Unknown CHAP digest type %d!\n",
+ chap->digest_type);
+ return -1;
+ }
+}
+
+u32 chap_main_loop(
+ struct iscsi_conn *conn,
+ struct iscsi_node_auth *auth,
+ char *in_text,
+ char *out_text,
+ int *in_len,
+ int *out_len)
+{
+ struct iscsi_chap *chap = conn->auth_protocol;
+
+ if (!chap) {
+ chap = chap_server_open(conn, auth, in_text, out_text, out_len);
+ if (!chap)
+ return 2;
+ chap->chap_state = CHAP_STAGE_SERVER_AIC;
+ return 0;
+ } else if (chap->chap_state == CHAP_STAGE_SERVER_AIC) {
+ convert_null_to_semi(in_text, *in_len);
+ if (chap_got_response(conn, auth, in_text, out_text,
+ out_len) < 0) {
+ chap_close(conn);
+ return 2;
+ }
+ if (auth->authenticate_target)
+ chap->chap_state = CHAP_STAGE_SERVER_NR;
+ else
+ *out_len = 0;
+ chap_close(conn);
+ return 1;
+ }
+
+ return 2;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.h
new file mode 100644
index 0000000..2f463c0
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_auth.h
@@ -0,0 +1,31 @@
+#ifndef _ISCSI_CHAP_H_
+#define _ISCSI_CHAP_H_
+
+#define CHAP_DIGEST_MD5 5
+#define CHAP_DIGEST_SHA 6
+
+#define CHAP_CHALLENGE_LENGTH 16
+#define CHAP_CHALLENGE_STR_LEN 4096
+#define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 */
+#define MAX_CHAP_N_SIZE 512
+
+#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
+
+#define CHAP_STAGE_CLIENT_A 1
+#define CHAP_STAGE_SERVER_AIC 2
+#define CHAP_STAGE_CLIENT_NR 3
+#define CHAP_STAGE_CLIENT_NRIC 4
+#define CHAP_STAGE_SERVER_NR 5
+
+extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *,
+ int *, int *);
+
+struct iscsi_chap {
+ unsigned char digest_type;
+ unsigned char id;
+ unsigned char challenge[CHAP_CHALLENGE_LENGTH];
+ unsigned int authenticate_target;
+ unsigned int chap_state;
+} ____cacheline_aligned;
+
+#endif /*** _ISCSI_CHAP_H_ ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.c
new file mode 100644
index 0000000..facb3ad
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.c
@@ -0,0 +1,1832 @@
+/*******************************************************************************
+ * This file contains the configfs implementation for iSCSI Target mode
+ * from the LIO-Target Project.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/configfs.h>
+#include <linux/export.h>
+#include <linux/inet.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_nodeattrib.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_stat.h"
+#include "iscsi_target_configfs.h"
+
+struct target_fabric_configfs *lio_target_fabric_configfs;
+
+struct lio_target_configfs_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(void *, char *);
+ ssize_t (*store)(void *, const char *, size_t);
+};
+
+struct iscsi_portal_group *lio_get_tpg_from_tpg_item(
+ struct config_item *item,
+ struct iscsi_tiqn **tiqn_out)
+{
+ struct se_portal_group *se_tpg = container_of(to_config_group(item),
+ struct se_portal_group, tpg_group);
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+ int ret;
+
+ if (!tpg) {
+ pr_err("Unable to locate struct iscsi_portal_group "
+ "pointer\n");
+ return NULL;
+ }
+ ret = iscsit_get_tpg(tpg);
+ if (ret < 0)
+ return NULL;
+
+ *tiqn_out = tpg->tpg_tiqn;
+ return tpg;
+}
+
+/* Start items for lio_target_portal_cit */
+
+static ssize_t lio_target_np_show_sctp(
+ struct se_tpg_np *se_tpg_np,
+ char *page)
+{
+ struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
+ struct iscsi_tpg_np, se_tpg_np);
+ struct iscsi_tpg_np *tpg_np_sctp;
+ ssize_t rb;
+
+ tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
+ if (tpg_np_sctp)
+ rb = sprintf(page, "1\n");
+ else
+ rb = sprintf(page, "0\n");
+
+ return rb;
+}
+
+static ssize_t lio_target_np_store_sctp(
+ struct se_tpg_np *se_tpg_np,
+ const char *page,
+ size_t count)
+{
+ struct iscsi_np *np;
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
+ struct iscsi_tpg_np, se_tpg_np);
+ struct iscsi_tpg_np *tpg_np_sctp = NULL;
+ char *endptr;
+ u32 op;
+ int ret;
+
+ op = simple_strtoul(page, &endptr, 0);
+ if ((op != 1) && (op != 0)) {
+ pr_err("Illegal value for tpg_enable: %u\n", op);
+ return -EINVAL;
+ }
+ np = tpg_np->tpg_np;
+ if (!np) {
+ pr_err("Unable to locate struct iscsi_np from"
+ " struct iscsi_tpg_np\n");
+ return -EINVAL;
+ }
+
+ tpg = tpg_np->tpg;
+ if (iscsit_get_tpg(tpg) < 0)
+ return -EINVAL;
+
+ if (op) {
+ /*
+ * Use existing np->np_sockaddr for SCTP network portal reference
+ */
+ tpg_np_sctp = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr,
+ np->np_ip, tpg_np, ISCSI_SCTP_TCP);
+ if (!tpg_np_sctp || IS_ERR(tpg_np_sctp))
+ goto out;
+ } else {
+ tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
+ if (!tpg_np_sctp)
+ goto out;
+
+ ret = iscsit_tpg_del_network_portal(tpg, tpg_np_sctp);
+ if (ret < 0)
+ goto out;
+ }
+
+ iscsit_put_tpg(tpg);
+ return count;
+out:
+ iscsit_put_tpg(tpg);
+ return -EINVAL;
+}
+
+TF_NP_BASE_ATTR(lio_target, sctp, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_portal_attrs[] = {
+ &lio_target_np_sctp.attr,
+ NULL,
+};
+
+/* Stop items for lio_target_portal_cit */
+
+/* Start items for lio_target_np_cit */
+
+#define MAX_PORTAL_LEN 256
+
+struct se_tpg_np *lio_target_call_addnptotpg(
+ struct se_portal_group *se_tpg,
+ struct config_group *group,
+ const char *name)
+{
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tpg_np *tpg_np;
+ char *str, *str2, *ip_str, *port_str;
+ struct __kernel_sockaddr_storage sockaddr;
+ struct sockaddr_in *sock_in;
+ struct sockaddr_in6 *sock_in6;
+ unsigned long port;
+ int ret;
+ char buf[MAX_PORTAL_LEN + 1];
+
+ if (strlen(name) > MAX_PORTAL_LEN) {
+ pr_err("strlen(name): %d exceeds MAX_PORTAL_LEN: %d\n",
+ (int)strlen(name), MAX_PORTAL_LEN);
+ return ERR_PTR(-EOVERFLOW);
+ }
+ memset(buf, 0, MAX_PORTAL_LEN + 1);
+ snprintf(buf, MAX_PORTAL_LEN + 1, "%s", name);
+
+ memset(&sockaddr, 0, sizeof(struct __kernel_sockaddr_storage));
+
+ str = strstr(buf, "[");
+ if (str) {
+ const char *end;
+
+ str2 = strstr(str, "]");
+ if (!str2) {
+ pr_err("Unable to locate trailing \"]\""
+ " in IPv6 iSCSI network portal address\n");
+ return ERR_PTR(-EINVAL);
+ }
+ str++; /* Skip over leading "[" */
+ *str2 = '\0'; /* Terminate the IPv6 address */
+ str2++; /* Skip over the "]" */
+ port_str = strstr(str2, ":");
+ if (!port_str) {
+ pr_err("Unable to locate \":port\""
+ " in IPv6 iSCSI network portal address\n");
+ return ERR_PTR(-EINVAL);
+ }
+ *port_str = '\0'; /* Terminate string for IP */
+ port_str++; /* Skip over ":" */
+
+ ret = strict_strtoul(port_str, 0, &port);
+ if (ret < 0) {
+ pr_err("strict_strtoul() failed for port_str: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+ sock_in6 = (struct sockaddr_in6 *)&sockaddr;
+ sock_in6->sin6_family = AF_INET6;
+ sock_in6->sin6_port = htons((unsigned short)port);
+ ret = in6_pton(str, IPV6_ADDRESS_SPACE,
+ (void *)&sock_in6->sin6_addr.in6_u, -1, &end);
+ if (ret <= 0) {
+ pr_err("in6_pton returned: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ } else {
+ str = ip_str = &buf[0];
+ port_str = strstr(ip_str, ":");
+ if (!port_str) {
+ pr_err("Unable to locate \":port\""
+ " in IPv4 iSCSI network portal address\n");
+ return ERR_PTR(-EINVAL);
+ }
+ *port_str = '\0'; /* Terminate string for IP */
+ port_str++; /* Skip over ":" */
+
+ ret = strict_strtoul(port_str, 0, &port);
+ if (ret < 0) {
+ pr_err("strict_strtoul() failed for port_str: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+ sock_in = (struct sockaddr_in *)&sockaddr;
+ sock_in->sin_family = AF_INET;
+ sock_in->sin_port = htons((unsigned short)port);
+ sock_in->sin_addr.s_addr = in_aton(ip_str);
+ }
+ tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
+ ret = iscsit_get_tpg(tpg);
+ if (ret < 0)
+ return ERR_PTR(-EINVAL);
+
+ pr_debug("LIO_Target_ConfigFS: REGISTER -> %s TPGT: %hu"
+ " PORTAL: %s\n",
+ config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
+ tpg->tpgt, name);
+ /*
+ * Assume ISCSI_TCP by default. Other network portals for other
+ * iSCSI fabrics:
+ *
+ * Traditional iSCSI over SCTP (initial support)
+ * iSER/TCP (TODO, hardware available)
+ * iSER/SCTP (TODO, software emulation with osc-iwarp)
+ * iSER/IB (TODO, hardware available)
+ *
+ * can be enabled with atributes under
+ * sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
+ *
+ */
+ tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, str, NULL,
+ ISCSI_TCP);
+ if (IS_ERR(tpg_np)) {
+ iscsit_put_tpg(tpg);
+ return ERR_CAST(tpg_np);
+ }
+ pr_debug("LIO_Target_ConfigFS: addnptotpg done!\n");
+
+ iscsit_put_tpg(tpg);
+ return &tpg_np->se_tpg_np;
+}
+
+static void lio_target_call_delnpfromtpg(
+ struct se_tpg_np *se_tpg_np)
+{
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tpg_np *tpg_np;
+ struct se_portal_group *se_tpg;
+ int ret;
+
+ tpg_np = container_of(se_tpg_np, struct iscsi_tpg_np, se_tpg_np);
+ tpg = tpg_np->tpg;
+ ret = iscsit_get_tpg(tpg);
+ if (ret < 0)
+ return;
+
+ se_tpg = &tpg->tpg_se_tpg;
+ pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
+ " PORTAL: %s:%hu\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
+ tpg->tpgt, tpg_np->tpg_np->np_ip, tpg_np->tpg_np->np_port);
+
+ ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
+ if (ret < 0)
+ goto out;
+
+ pr_debug("LIO_Target_ConfigFS: delnpfromtpg done!\n");
+out:
+ iscsit_put_tpg(tpg);
+}
+
+/* End items for lio_target_np_cit */
+
+/* Start items for lio_target_nacl_attrib_cit */
+
+#define DEF_NACL_ATTRIB(name) \
+static ssize_t iscsi_nacl_attrib_show_##name( \
+ struct se_node_acl *se_nacl, \
+ char *page) \
+{ \
+ struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
+ se_node_acl); \
+ \
+ return sprintf(page, "%u\n", ISCSI_NODE_ATTRIB(nacl)->name); \
+} \
+ \
+static ssize_t iscsi_nacl_attrib_store_##name( \
+ struct se_node_acl *se_nacl, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
+ se_node_acl); \
+ char *endptr; \
+ u32 val; \
+ int ret; \
+ \
+ val = simple_strtoul(page, &endptr, 0); \
+ ret = iscsit_na_##name(nacl, val); \
+ if (ret < 0) \
+ return ret; \
+ \
+ return count; \
+}
+
+#define NACL_ATTR(_name, _mode) TF_NACL_ATTRIB_ATTR(iscsi, _name, _mode);
+/*
+ * Define iscsi_node_attrib_s_dataout_timeout
+ */
+DEF_NACL_ATTRIB(dataout_timeout);
+NACL_ATTR(dataout_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_dataout_timeout_retries
+ */
+DEF_NACL_ATTRIB(dataout_timeout_retries);
+NACL_ATTR(dataout_timeout_retries, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_default_erl
+ */
+DEF_NACL_ATTRIB(default_erl);
+NACL_ATTR(default_erl, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_nopin_timeout
+ */
+DEF_NACL_ATTRIB(nopin_timeout);
+NACL_ATTR(nopin_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_nopin_response_timeout
+ */
+DEF_NACL_ATTRIB(nopin_response_timeout);
+NACL_ATTR(nopin_response_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_datain_pdu_offsets
+ */
+DEF_NACL_ATTRIB(random_datain_pdu_offsets);
+NACL_ATTR(random_datain_pdu_offsets, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_datain_seq_offsets
+ */
+DEF_NACL_ATTRIB(random_datain_seq_offsets);
+NACL_ATTR(random_datain_seq_offsets, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_r2t_offsets
+ */
+DEF_NACL_ATTRIB(random_r2t_offsets);
+NACL_ATTR(random_r2t_offsets, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_nacl_attrib_attrs[] = {
+ &iscsi_nacl_attrib_dataout_timeout.attr,
+ &iscsi_nacl_attrib_dataout_timeout_retries.attr,
+ &iscsi_nacl_attrib_default_erl.attr,
+ &iscsi_nacl_attrib_nopin_timeout.attr,
+ &iscsi_nacl_attrib_nopin_response_timeout.attr,
+ &iscsi_nacl_attrib_random_datain_pdu_offsets.attr,
+ &iscsi_nacl_attrib_random_datain_seq_offsets.attr,
+ &iscsi_nacl_attrib_random_r2t_offsets.attr,
+ NULL,
+};
+
+/* End items for lio_target_nacl_attrib_cit */
+
+/* Start items for lio_target_nacl_auth_cit */
+
+#define __DEF_NACL_AUTH_STR(prefix, name, flags) \
+static ssize_t __iscsi_##prefix##_show_##name( \
+ struct iscsi_node_acl *nacl, \
+ char *page) \
+{ \
+ struct iscsi_node_auth *auth = &nacl->node_auth; \
+ \
+ if (!capable(CAP_SYS_ADMIN)) \
+ return -EPERM; \
+ return snprintf(page, PAGE_SIZE, "%s\n", auth->name); \
+} \
+ \
+static ssize_t __iscsi_##prefix##_store_##name( \
+ struct iscsi_node_acl *nacl, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct iscsi_node_auth *auth = &nacl->node_auth; \
+ \
+ if (!capable(CAP_SYS_ADMIN)) \
+ return -EPERM; \
+ \
+ snprintf(auth->name, sizeof(auth->name), "%s", page); \
+ if (!strncmp("NULL", auth->name, 4)) \
+ auth->naf_flags &= ~flags; \
+ else \
+ auth->naf_flags |= flags; \
+ \
+ if ((auth->naf_flags & NAF_USERID_IN_SET) && \
+ (auth->naf_flags & NAF_PASSWORD_IN_SET)) \
+ auth->authenticate_target = 1; \
+ else \
+ auth->authenticate_target = 0; \
+ \
+ return count; \
+}
+
+#define __DEF_NACL_AUTH_INT(prefix, name) \
+static ssize_t __iscsi_##prefix##_show_##name( \
+ struct iscsi_node_acl *nacl, \
+ char *page) \
+{ \
+ struct iscsi_node_auth *auth = &nacl->node_auth; \
+ \
+ if (!capable(CAP_SYS_ADMIN)) \
+ return -EPERM; \
+ \
+ return snprintf(page, PAGE_SIZE, "%d\n", auth->name); \
+}
+
+#define DEF_NACL_AUTH_STR(name, flags) \
+ __DEF_NACL_AUTH_STR(nacl_auth, name, flags) \
+static ssize_t iscsi_nacl_auth_show_##name( \
+ struct se_node_acl *nacl, \
+ char *page) \
+{ \
+ return __iscsi_nacl_auth_show_##name(container_of(nacl, \
+ struct iscsi_node_acl, se_node_acl), page); \
+} \
+static ssize_t iscsi_nacl_auth_store_##name( \
+ struct se_node_acl *nacl, \
+ const char *page, \
+ size_t count) \
+{ \
+ return __iscsi_nacl_auth_store_##name(container_of(nacl, \
+ struct iscsi_node_acl, se_node_acl), page, count); \
+}
+
+#define DEF_NACL_AUTH_INT(name) \
+ __DEF_NACL_AUTH_INT(nacl_auth, name) \
+static ssize_t iscsi_nacl_auth_show_##name( \
+ struct se_node_acl *nacl, \
+ char *page) \
+{ \
+ return __iscsi_nacl_auth_show_##name(container_of(nacl, \
+ struct iscsi_node_acl, se_node_acl), page); \
+}
+
+#define AUTH_ATTR(_name, _mode) TF_NACL_AUTH_ATTR(iscsi, _name, _mode);
+#define AUTH_ATTR_RO(_name) TF_NACL_AUTH_ATTR_RO(iscsi, _name);
+
+/*
+ * One-way authentication userid
+ */
+DEF_NACL_AUTH_STR(userid, NAF_USERID_SET);
+AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
+/*
+ * One-way authentication password
+ */
+DEF_NACL_AUTH_STR(password, NAF_PASSWORD_SET);
+AUTH_ATTR(password, S_IRUGO | S_IWUSR);
+/*
+ * Enforce mutual authentication
+ */
+DEF_NACL_AUTH_INT(authenticate_target);
+AUTH_ATTR_RO(authenticate_target);
+/*
+ * Mutual authentication userid
+ */
+DEF_NACL_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
+AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
+/*
+ * Mutual authentication password
+ */
+DEF_NACL_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
+AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_nacl_auth_attrs[] = {
+ &iscsi_nacl_auth_userid.attr,
+ &iscsi_nacl_auth_password.attr,
+ &iscsi_nacl_auth_authenticate_target.attr,
+ &iscsi_nacl_auth_userid_mutual.attr,
+ &iscsi_nacl_auth_password_mutual.attr,
+ NULL,
+};
+
+/* End items for lio_target_nacl_auth_cit */
+
+/* Start items for lio_target_nacl_param_cit */
+
+#define DEF_NACL_PARAM(name) \
+static ssize_t iscsi_nacl_param_show_##name( \
+ struct se_node_acl *se_nacl, \
+ char *page) \
+{ \
+ struct iscsi_session *sess; \
+ struct se_session *se_sess; \
+ ssize_t rb; \
+ \
+ spin_lock_bh(&se_nacl->nacl_sess_lock); \
+ se_sess = se_nacl->nacl_sess; \
+ if (!se_sess) { \
+ rb = snprintf(page, PAGE_SIZE, \
+ "No Active iSCSI Session\n"); \
+ } else { \
+ sess = se_sess->fabric_sess_ptr; \
+ rb = snprintf(page, PAGE_SIZE, "%u\n", \
+ (u32)sess->sess_ops->name); \
+ } \
+ spin_unlock_bh(&se_nacl->nacl_sess_lock); \
+ \
+ return rb; \
+}
+
+#define NACL_PARAM_ATTR(_name) TF_NACL_PARAM_ATTR_RO(iscsi, _name);
+
+DEF_NACL_PARAM(MaxConnections);
+NACL_PARAM_ATTR(MaxConnections);
+
+DEF_NACL_PARAM(InitialR2T);
+NACL_PARAM_ATTR(InitialR2T);
+
+DEF_NACL_PARAM(ImmediateData);
+NACL_PARAM_ATTR(ImmediateData);
+
+DEF_NACL_PARAM(MaxBurstLength);
+NACL_PARAM_ATTR(MaxBurstLength);
+
+DEF_NACL_PARAM(FirstBurstLength);
+NACL_PARAM_ATTR(FirstBurstLength);
+
+DEF_NACL_PARAM(DefaultTime2Wait);
+NACL_PARAM_ATTR(DefaultTime2Wait);
+
+DEF_NACL_PARAM(DefaultTime2Retain);
+NACL_PARAM_ATTR(DefaultTime2Retain);
+
+DEF_NACL_PARAM(MaxOutstandingR2T);
+NACL_PARAM_ATTR(MaxOutstandingR2T);
+
+DEF_NACL_PARAM(DataPDUInOrder);
+NACL_PARAM_ATTR(DataPDUInOrder);
+
+DEF_NACL_PARAM(DataSequenceInOrder);
+NACL_PARAM_ATTR(DataSequenceInOrder);
+
+DEF_NACL_PARAM(ErrorRecoveryLevel);
+NACL_PARAM_ATTR(ErrorRecoveryLevel);
+
+static struct configfs_attribute *lio_target_nacl_param_attrs[] = {
+ &iscsi_nacl_param_MaxConnections.attr,
+ &iscsi_nacl_param_InitialR2T.attr,
+ &iscsi_nacl_param_ImmediateData.attr,
+ &iscsi_nacl_param_MaxBurstLength.attr,
+ &iscsi_nacl_param_FirstBurstLength.attr,
+ &iscsi_nacl_param_DefaultTime2Wait.attr,
+ &iscsi_nacl_param_DefaultTime2Retain.attr,
+ &iscsi_nacl_param_MaxOutstandingR2T.attr,
+ &iscsi_nacl_param_DataPDUInOrder.attr,
+ &iscsi_nacl_param_DataSequenceInOrder.attr,
+ &iscsi_nacl_param_ErrorRecoveryLevel.attr,
+ NULL,
+};
+
+/* End items for lio_target_nacl_param_cit */
+
+/* Start items for lio_target_acl_cit */
+
+static ssize_t lio_target_nacl_show_info(
+ struct se_node_acl *se_nacl,
+ char *page)
+{
+ struct iscsi_session *sess;
+ struct iscsi_conn *conn;
+ struct se_session *se_sess;
+ ssize_t rb = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (!se_sess) {
+ rb += sprintf(page+rb, "No active iSCSI Session for Initiator"
+ " Endpoint: %s\n", se_nacl->initiatorname);
+ } else {
+ sess = se_sess->fabric_sess_ptr;
+
+ if (sess->sess_ops->InitiatorName)
+ rb += sprintf(page+rb, "InitiatorName: %s\n",
+ sess->sess_ops->InitiatorName);
+ if (sess->sess_ops->InitiatorAlias)
+ rb += sprintf(page+rb, "InitiatorAlias: %s\n",
+ sess->sess_ops->InitiatorAlias);
+
+ rb += sprintf(page+rb, "LIO Session ID: %u "
+ "ISID: 0x%02x %02x %02x %02x %02x %02x "
+ "TSIH: %hu ", sess->sid,
+ sess->isid[0], sess->isid[1], sess->isid[2],
+ sess->isid[3], sess->isid[4], sess->isid[5],
+ sess->tsih);
+ rb += sprintf(page+rb, "SessionType: %s\n",
+ (sess->sess_ops->SessionType) ?
+ "Discovery" : "Normal");
+ rb += sprintf(page+rb, "Session State: ");
+ switch (sess->session_state) {
+ case TARG_SESS_STATE_FREE:
+ rb += sprintf(page+rb, "TARG_SESS_FREE\n");
+ break;
+ case TARG_SESS_STATE_ACTIVE:
+ rb += sprintf(page+rb, "TARG_SESS_STATE_ACTIVE\n");
+ break;
+ case TARG_SESS_STATE_LOGGED_IN:
+ rb += sprintf(page+rb, "TARG_SESS_STATE_LOGGED_IN\n");
+ break;
+ case TARG_SESS_STATE_FAILED:
+ rb += sprintf(page+rb, "TARG_SESS_STATE_FAILED\n");
+ break;
+ case TARG_SESS_STATE_IN_CONTINUE:
+ rb += sprintf(page+rb, "TARG_SESS_STATE_IN_CONTINUE\n");
+ break;
+ default:
+ rb += sprintf(page+rb, "ERROR: Unknown Session"
+ " State!\n");
+ break;
+ }
+
+ rb += sprintf(page+rb, "---------------------[iSCSI Session"
+ " Values]-----------------------\n");
+ rb += sprintf(page+rb, " CmdSN/WR : CmdSN/WC : ExpCmdSN"
+ " : MaxCmdSN : ITT : TTT\n");
+ rb += sprintf(page+rb, " 0x%08x 0x%08x 0x%08x 0x%08x"
+ " 0x%08x 0x%08x\n",
+ sess->cmdsn_window,
+ (sess->max_cmd_sn - sess->exp_cmd_sn) + 1,
+ sess->exp_cmd_sn, sess->max_cmd_sn,
+ sess->init_task_tag, sess->targ_xfer_tag);
+ rb += sprintf(page+rb, "----------------------[iSCSI"
+ " Connections]-------------------------\n");
+
+ spin_lock(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
+ rb += sprintf(page+rb, "CID: %hu Connection"
+ " State: ", conn->cid);
+ switch (conn->conn_state) {
+ case TARG_CONN_STATE_FREE:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_FREE\n");
+ break;
+ case TARG_CONN_STATE_XPT_UP:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_XPT_UP\n");
+ break;
+ case TARG_CONN_STATE_IN_LOGIN:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_IN_LOGIN\n");
+ break;
+ case TARG_CONN_STATE_LOGGED_IN:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_LOGGED_IN\n");
+ break;
+ case TARG_CONN_STATE_IN_LOGOUT:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_IN_LOGOUT\n");
+ break;
+ case TARG_CONN_STATE_LOGOUT_REQUESTED:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_LOGOUT_REQUESTED\n");
+ break;
+ case TARG_CONN_STATE_CLEANUP_WAIT:
+ rb += sprintf(page+rb,
+ "TARG_CONN_STATE_CLEANUP_WAIT\n");
+ break;
+ default:
+ rb += sprintf(page+rb,
+ "ERROR: Unknown Connection State!\n");
+ break;
+ }
+
+ rb += sprintf(page+rb, " Address %s %s", conn->login_ip,
+ (conn->network_transport == ISCSI_TCP) ?
+ "TCP" : "SCTP");
+ rb += sprintf(page+rb, " StatSN: 0x%08x\n",
+ conn->stat_sn);
+ }
+ spin_unlock(&sess->conn_lock);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return rb;
+}
+
+TF_NACL_BASE_ATTR_RO(lio_target, info);
+
+static ssize_t lio_target_nacl_show_cmdsn_depth(
+ struct se_node_acl *se_nacl,
+ char *page)
+{
+ return sprintf(page, "%u\n", se_nacl->queue_depth);
+}
+
+static ssize_t lio_target_nacl_store_cmdsn_depth(
+ struct se_node_acl *se_nacl,
+ const char *page,
+ size_t count)
+{
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ struct iscsi_portal_group *tpg = container_of(se_tpg,
+ struct iscsi_portal_group, tpg_se_tpg);
+ struct config_item *acl_ci, *tpg_ci, *wwn_ci;
+ char *endptr;
+ u32 cmdsn_depth = 0;
+ int ret;
+
+ cmdsn_depth = simple_strtoul(page, &endptr, 0);
+ if (cmdsn_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
+ pr_err("Passed cmdsn_depth: %u exceeds"
+ " TA_DEFAULT_CMDSN_DEPTH_MAX: %u\n", cmdsn_depth,
+ TA_DEFAULT_CMDSN_DEPTH_MAX);
+ return -EINVAL;
+ }
+ acl_ci = &se_nacl->acl_group.cg_item;
+ if (!acl_ci) {
+ pr_err("Unable to locatel acl_ci\n");
+ return -EINVAL;
+ }
+ tpg_ci = &acl_ci->ci_parent->ci_group->cg_item;
+ if (!tpg_ci) {
+ pr_err("Unable to locate tpg_ci\n");
+ return -EINVAL;
+ }
+ wwn_ci = &tpg_ci->ci_group->cg_item;
+ if (!wwn_ci) {
+ pr_err("Unable to locate config_item wwn_ci\n");
+ return -EINVAL;
+ }
+
+ if (iscsit_get_tpg(tpg) < 0)
+ return -EINVAL;
+ /*
+ * iscsit_tpg_set_initiator_node_queue_depth() assumes force=1
+ */
+ ret = iscsit_tpg_set_initiator_node_queue_depth(tpg,
+ config_item_name(acl_ci), cmdsn_depth, 1);
+
+ pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
+ "InitiatorName: %s\n", config_item_name(wwn_ci),
+ config_item_name(tpg_ci), cmdsn_depth,
+ config_item_name(acl_ci));
+
+ iscsit_put_tpg(tpg);
+ return (!ret) ? count : (ssize_t)ret;
+}
+
+TF_NACL_BASE_ATTR(lio_target, cmdsn_depth, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_initiator_attrs[] = {
+ &lio_target_nacl_info.attr,
+ &lio_target_nacl_cmdsn_depth.attr,
+ NULL,
+};
+
+static struct se_node_acl *lio_tpg_alloc_fabric_acl(
+ struct se_portal_group *se_tpg)
+{
+ struct iscsi_node_acl *acl;
+
+ acl = kzalloc(sizeof(struct iscsi_node_acl), GFP_KERNEL);
+ if (!acl) {
+ pr_err("Unable to allocate memory for struct iscsi_node_acl\n");
+ return NULL;
+ }
+
+ return &acl->se_node_acl;
+}
+
+static struct se_node_acl *lio_target_make_nodeacl(
+ struct se_portal_group *se_tpg,
+ struct config_group *group,
+ const char *name)
+{
+ struct config_group *stats_cg;
+ struct iscsi_node_acl *acl;
+ struct se_node_acl *se_nacl_new, *se_nacl;
+ struct iscsi_portal_group *tpg = container_of(se_tpg,
+ struct iscsi_portal_group, tpg_se_tpg);
+ u32 cmdsn_depth;
+
+ se_nacl_new = lio_tpg_alloc_fabric_acl(se_tpg);
+ if (!se_nacl_new)
+ return ERR_PTR(-ENOMEM);
+
+ cmdsn_depth = ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
+ /*
+ * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
+ * when converting a NdoeACL from demo mode -> explict
+ */
+ se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
+ name, cmdsn_depth);
+ if (IS_ERR(se_nacl))
+ return se_nacl;
+
+ acl = container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
+ stats_cg = &se_nacl->acl_fabric_stat_group;
+
+ stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!stats_cg->default_groups) {
+ pr_err("Unable to allocate memory for"
+ " stats_cg->default_groups\n");
+ core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
+ kfree(acl);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ stats_cg->default_groups[0] = &NODE_STAT_GRPS(acl)->iscsi_sess_stats_group;
+ stats_cg->default_groups[1] = NULL;
+ config_group_init_type_name(&NODE_STAT_GRPS(acl)->iscsi_sess_stats_group,
+ "iscsi_sess_stats", &iscsi_stat_sess_cit);
+
+ return se_nacl;
+}
+
+static void lio_target_drop_nodeacl(
+ struct se_node_acl *se_nacl)
+{
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ struct iscsi_node_acl *acl = container_of(se_nacl,
+ struct iscsi_node_acl, se_node_acl);
+ struct config_item *df_item;
+ struct config_group *stats_cg;
+ int i;
+
+ stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
+ for (i = 0; stats_cg->default_groups[i]; i++) {
+ df_item = &stats_cg->default_groups[i]->cg_item;
+ stats_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(stats_cg->default_groups);
+
+ core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
+ kfree(acl);
+}
+
+/* End items for lio_target_acl_cit */
+
+/* Start items for lio_target_tpg_attrib_cit */
+
+#define DEF_TPG_ATTRIB(name) \
+ \
+static ssize_t iscsi_tpg_attrib_show_##name( \
+ struct se_portal_group *se_tpg, \
+ char *page) \
+{ \
+ struct iscsi_portal_group *tpg = container_of(se_tpg, \
+ struct iscsi_portal_group, tpg_se_tpg); \
+ ssize_t rb; \
+ \
+ if (iscsit_get_tpg(tpg) < 0) \
+ return -EINVAL; \
+ \
+ rb = sprintf(page, "%u\n", ISCSI_TPG_ATTRIB(tpg)->name); \
+ iscsit_put_tpg(tpg); \
+ return rb; \
+} \
+ \
+static ssize_t iscsi_tpg_attrib_store_##name( \
+ struct se_portal_group *se_tpg, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct iscsi_portal_group *tpg = container_of(se_tpg, \
+ struct iscsi_portal_group, tpg_se_tpg); \
+ char *endptr; \
+ u32 val; \
+ int ret; \
+ \
+ if (iscsit_get_tpg(tpg) < 0) \
+ return -EINVAL; \
+ \
+ val = simple_strtoul(page, &endptr, 0); \
+ ret = iscsit_ta_##name(tpg, val); \
+ if (ret < 0) \
+ goto out; \
+ \
+ iscsit_put_tpg(tpg); \
+ return count; \
+out: \
+ iscsit_put_tpg(tpg); \
+ return ret; \
+}
+
+#define TPG_ATTR(_name, _mode) TF_TPG_ATTRIB_ATTR(iscsi, _name, _mode);
+
+/*
+ * Define iscsi_tpg_attrib_s_authentication
+ */
+DEF_TPG_ATTRIB(authentication);
+TPG_ATTR(authentication, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_login_timeout
+ */
+DEF_TPG_ATTRIB(login_timeout);
+TPG_ATTR(login_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_netif_timeout
+ */
+DEF_TPG_ATTRIB(netif_timeout);
+TPG_ATTR(netif_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_generate_node_acls
+ */
+DEF_TPG_ATTRIB(generate_node_acls);
+TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_default_cmdsn_depth
+ */
+DEF_TPG_ATTRIB(default_cmdsn_depth);
+TPG_ATTR(default_cmdsn_depth, S_IRUGO | S_IWUSR);
+/*
+ Define iscsi_tpg_attrib_s_cache_dynamic_acls
+ */
+DEF_TPG_ATTRIB(cache_dynamic_acls);
+TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_demo_mode_write_protect
+ */
+DEF_TPG_ATTRIB(demo_mode_write_protect);
+TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_prod_mode_write_protect
+ */
+DEF_TPG_ATTRIB(prod_mode_write_protect);
+TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
+ &iscsi_tpg_attrib_authentication.attr,
+ &iscsi_tpg_attrib_login_timeout.attr,
+ &iscsi_tpg_attrib_netif_timeout.attr,
+ &iscsi_tpg_attrib_generate_node_acls.attr,
+ &iscsi_tpg_attrib_default_cmdsn_depth.attr,
+ &iscsi_tpg_attrib_cache_dynamic_acls.attr,
+ &iscsi_tpg_attrib_demo_mode_write_protect.attr,
+ &iscsi_tpg_attrib_prod_mode_write_protect.attr,
+ NULL,
+};
+
+/* End items for lio_target_tpg_attrib_cit */
+
+/* Start items for lio_target_tpg_param_cit */
+
+#define DEF_TPG_PARAM(name) \
+static ssize_t iscsi_tpg_param_show_##name( \
+ struct se_portal_group *se_tpg, \
+ char *page) \
+{ \
+ struct iscsi_portal_group *tpg = container_of(se_tpg, \
+ struct iscsi_portal_group, tpg_se_tpg); \
+ struct iscsi_param *param; \
+ ssize_t rb; \
+ \
+ if (iscsit_get_tpg(tpg) < 0) \
+ return -EINVAL; \
+ \
+ param = iscsi_find_param_from_key(__stringify(name), \
+ tpg->param_list); \
+ if (!param) { \
+ iscsit_put_tpg(tpg); \
+ return -EINVAL; \
+ } \
+ rb = snprintf(page, PAGE_SIZE, "%s\n", param->value); \
+ \
+ iscsit_put_tpg(tpg); \
+ return rb; \
+} \
+static ssize_t iscsi_tpg_param_store_##name( \
+ struct se_portal_group *se_tpg, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct iscsi_portal_group *tpg = container_of(se_tpg, \
+ struct iscsi_portal_group, tpg_se_tpg); \
+ char *buf; \
+ int ret; \
+ \
+ buf = kzalloc(PAGE_SIZE, GFP_KERNEL); \
+ if (!buf) \
+ return -ENOMEM; \
+ snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page); \
+ buf[strlen(buf)-1] = '\0'; /* Kill newline */ \
+ \
+ if (iscsit_get_tpg(tpg) < 0) { \
+ kfree(buf); \
+ return -EINVAL; \
+ } \
+ \
+ ret = iscsi_change_param_value(buf, tpg->param_list, 1); \
+ if (ret < 0) \
+ goto out; \
+ \
+ kfree(buf); \
+ iscsit_put_tpg(tpg); \
+ return count; \
+out: \
+ kfree(buf); \
+ iscsit_put_tpg(tpg); \
+ return -EINVAL; \
+}
+
+#define TPG_PARAM_ATTR(_name, _mode) TF_TPG_PARAM_ATTR(iscsi, _name, _mode);
+
+DEF_TPG_PARAM(AuthMethod);
+TPG_PARAM_ATTR(AuthMethod, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(HeaderDigest);
+TPG_PARAM_ATTR(HeaderDigest, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataDigest);
+TPG_PARAM_ATTR(DataDigest, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxConnections);
+TPG_PARAM_ATTR(MaxConnections, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(TargetAlias);
+TPG_PARAM_ATTR(TargetAlias, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(InitialR2T);
+TPG_PARAM_ATTR(InitialR2T, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(ImmediateData);
+TPG_PARAM_ATTR(ImmediateData, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxRecvDataSegmentLength);
+TPG_PARAM_ATTR(MaxRecvDataSegmentLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxBurstLength);
+TPG_PARAM_ATTR(MaxBurstLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(FirstBurstLength);
+TPG_PARAM_ATTR(FirstBurstLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DefaultTime2Wait);
+TPG_PARAM_ATTR(DefaultTime2Wait, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DefaultTime2Retain);
+TPG_PARAM_ATTR(DefaultTime2Retain, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxOutstandingR2T);
+TPG_PARAM_ATTR(MaxOutstandingR2T, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataPDUInOrder);
+TPG_PARAM_ATTR(DataPDUInOrder, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataSequenceInOrder);
+TPG_PARAM_ATTR(DataSequenceInOrder, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(ErrorRecoveryLevel);
+TPG_PARAM_ATTR(ErrorRecoveryLevel, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(IFMarker);
+TPG_PARAM_ATTR(IFMarker, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(OFMarker);
+TPG_PARAM_ATTR(OFMarker, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(IFMarkInt);
+TPG_PARAM_ATTR(IFMarkInt, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(OFMarkInt);
+TPG_PARAM_ATTR(OFMarkInt, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_tpg_param_attrs[] = {
+ &iscsi_tpg_param_AuthMethod.attr,
+ &iscsi_tpg_param_HeaderDigest.attr,
+ &iscsi_tpg_param_DataDigest.attr,
+ &iscsi_tpg_param_MaxConnections.attr,
+ &iscsi_tpg_param_TargetAlias.attr,
+ &iscsi_tpg_param_InitialR2T.attr,
+ &iscsi_tpg_param_ImmediateData.attr,
+ &iscsi_tpg_param_MaxRecvDataSegmentLength.attr,
+ &iscsi_tpg_param_MaxBurstLength.attr,
+ &iscsi_tpg_param_FirstBurstLength.attr,
+ &iscsi_tpg_param_DefaultTime2Wait.attr,
+ &iscsi_tpg_param_DefaultTime2Retain.attr,
+ &iscsi_tpg_param_MaxOutstandingR2T.attr,
+ &iscsi_tpg_param_DataPDUInOrder.attr,
+ &iscsi_tpg_param_DataSequenceInOrder.attr,
+ &iscsi_tpg_param_ErrorRecoveryLevel.attr,
+ &iscsi_tpg_param_IFMarker.attr,
+ &iscsi_tpg_param_OFMarker.attr,
+ &iscsi_tpg_param_IFMarkInt.attr,
+ &iscsi_tpg_param_OFMarkInt.attr,
+ NULL,
+};
+
+/* End items for lio_target_tpg_param_cit */
+
+/* Start items for lio_target_tpg_cit */
+
+static ssize_t lio_target_tpg_show_enable(
+ struct se_portal_group *se_tpg,
+ char *page)
+{
+ struct iscsi_portal_group *tpg = container_of(se_tpg,
+ struct iscsi_portal_group, tpg_se_tpg);
+ ssize_t len;
+
+ spin_lock(&tpg->tpg_state_lock);
+ len = sprintf(page, "%d\n",
+ (tpg->tpg_state == TPG_STATE_ACTIVE) ? 1 : 0);
+ spin_unlock(&tpg->tpg_state_lock);
+
+ return len;
+}
+
+static ssize_t lio_target_tpg_store_enable(
+ struct se_portal_group *se_tpg,
+ const char *page,
+ size_t count)
+{
+ struct iscsi_portal_group *tpg = container_of(se_tpg,
+ struct iscsi_portal_group, tpg_se_tpg);
+ char *endptr;
+ u32 op;
+ int ret = 0;
+
+ op = simple_strtoul(page, &endptr, 0);
+ if ((op != 1) && (op != 0)) {
+ pr_err("Illegal value for tpg_enable: %u\n", op);
+ return -EINVAL;
+ }
+
+ ret = iscsit_get_tpg(tpg);
+ if (ret < 0)
+ return -EINVAL;
+
+ if (op) {
+ ret = iscsit_tpg_enable_portal_group(tpg);
+ if (ret < 0)
+ goto out;
+ } else {
+ /*
+ * iscsit_tpg_disable_portal_group() assumes force=1
+ */
+ ret = iscsit_tpg_disable_portal_group(tpg, 1);
+ if (ret < 0)
+ goto out;
+ }
+
+ iscsit_put_tpg(tpg);
+ return count;
+out:
+ iscsit_put_tpg(tpg);
+ return -EINVAL;
+}
+
+TF_TPG_BASE_ATTR(lio_target, enable, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_tpg_attrs[] = {
+ &lio_target_tpg_enable.attr,
+ NULL,
+};
+
+/* End items for lio_target_tpg_cit */
+
+/* Start items for lio_target_tiqn_cit */
+
+struct se_portal_group *lio_target_tiqn_addtpg(
+ struct se_wwn *wwn,
+ struct config_group *group,
+ const char *name)
+{
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tiqn *tiqn;
+ char *tpgt_str, *end_ptr;
+ int ret = 0;
+ unsigned short int tpgt;
+
+ tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
+ /*
+ * Only tpgt_# directory groups can be created below
+ * target/iscsi/iqn.superturodiskarry/
+ */
+ tpgt_str = strstr(name, "tpgt_");
+ if (!tpgt_str) {
+ pr_err("Unable to locate \"tpgt_#\" directory"
+ " group\n");
+ return NULL;
+ }
+ tpgt_str += 5; /* Skip ahead of "tpgt_" */
+ tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0);
+
+ tpg = iscsit_alloc_portal_group(tiqn, tpgt);
+ if (!tpg)
+ return NULL;
+
+ ret = core_tpg_register(
+ &lio_target_fabric_configfs->tf_ops,
+ wwn, &tpg->tpg_se_tpg, tpg,
+ TRANSPORT_TPG_TYPE_NORMAL);
+ if (ret < 0)
+ return NULL;
+
+ ret = iscsit_tpg_add_portal_group(tiqn, tpg);
+ if (ret != 0)
+ goto out;
+
+ pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
+ pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated TPG: %s\n",
+ name);
+ return &tpg->tpg_se_tpg;
+out:
+ core_tpg_deregister(&tpg->tpg_se_tpg);
+ kfree(tpg);
+ return NULL;
+}
+
+void lio_target_tiqn_deltpg(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tiqn *tiqn;
+
+ tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
+ tiqn = tpg->tpg_tiqn;
+ /*
+ * iscsit_tpg_del_portal_group() assumes force=1
+ */
+ pr_debug("LIO_Target_ConfigFS: DEREGISTER -> Releasing TPG\n");
+ iscsit_tpg_del_portal_group(tiqn, tpg, 1);
+}
+
+/* End items for lio_target_tiqn_cit */
+
+/* Start LIO-Target TIQN struct contig_item lio_target_cit */
+
+static ssize_t lio_target_wwn_show_attr_lio_version(
+ struct target_fabric_configfs *tf,
+ char *page)
+{
+ return sprintf(page, "RisingTide Systems Linux-iSCSI Target "ISCSIT_VERSION"\n");
+}
+
+TF_WWN_ATTR_RO(lio_target, lio_version);
+
+static struct configfs_attribute *lio_target_wwn_attrs[] = {
+ &lio_target_wwn_lio_version.attr,
+ NULL,
+};
+
+struct se_wwn *lio_target_call_coreaddtiqn(
+ struct target_fabric_configfs *tf,
+ struct config_group *group,
+ const char *name)
+{
+ struct config_group *stats_cg;
+ struct iscsi_tiqn *tiqn;
+
+ tiqn = iscsit_add_tiqn((unsigned char *)name);
+ if (IS_ERR(tiqn))
+ return ERR_CAST(tiqn);
+ /*
+ * Setup struct iscsi_wwn_stat_grps for se_wwn->fabric_stat_group.
+ */
+ stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
+
+ stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
+ GFP_KERNEL);
+ if (!stats_cg->default_groups) {
+ pr_err("Unable to allocate memory for"
+ " stats_cg->default_groups\n");
+ iscsit_del_tiqn(tiqn);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ stats_cg->default_groups[0] = &WWN_STAT_GRPS(tiqn)->iscsi_instance_group;
+ stats_cg->default_groups[1] = &WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group;
+ stats_cg->default_groups[2] = &WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group;
+ stats_cg->default_groups[3] = &WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group;
+ stats_cg->default_groups[4] = &WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group;
+ stats_cg->default_groups[5] = NULL;
+ config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_instance_group,
+ "iscsi_instance", &iscsi_stat_instance_cit);
+ config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group,
+ "iscsi_sess_err", &iscsi_stat_sess_err_cit);
+ config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group,
+ "iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
+ config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group,
+ "iscsi_login_stats", &iscsi_stat_login_cit);
+ config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group,
+ "iscsi_logout_stats", &iscsi_stat_logout_cit);
+
+ pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
+ pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
+ " %s\n", name);
+ return &tiqn->tiqn_wwn;
+}
+
+void lio_target_call_coredeltiqn(
+ struct se_wwn *wwn)
+{
+ struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
+ struct config_item *df_item;
+ struct config_group *stats_cg;
+ int i;
+
+ stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
+ for (i = 0; stats_cg->default_groups[i]; i++) {
+ df_item = &stats_cg->default_groups[i]->cg_item;
+ stats_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(stats_cg->default_groups);
+
+ pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
+ tiqn->tiqn);
+ iscsit_del_tiqn(tiqn);
+}
+
+/* End LIO-Target TIQN struct contig_lio_target_cit */
+
+/* Start lio_target_discovery_auth_cit */
+
+#define DEF_DISC_AUTH_STR(name, flags) \
+ __DEF_NACL_AUTH_STR(disc, name, flags) \
+static ssize_t iscsi_disc_show_##name( \
+ struct target_fabric_configfs *tf, \
+ char *page) \
+{ \
+ return __iscsi_disc_show_##name(&iscsit_global->discovery_acl, \
+ page); \
+} \
+static ssize_t iscsi_disc_store_##name( \
+ struct target_fabric_configfs *tf, \
+ const char *page, \
+ size_t count) \
+{ \
+ return __iscsi_disc_store_##name(&iscsit_global->discovery_acl, \
+ page, count); \
+}
+
+#define DEF_DISC_AUTH_INT(name) \
+ __DEF_NACL_AUTH_INT(disc, name) \
+static ssize_t iscsi_disc_show_##name( \
+ struct target_fabric_configfs *tf, \
+ char *page) \
+{ \
+ return __iscsi_disc_show_##name(&iscsit_global->discovery_acl, \
+ page); \
+}
+
+#define DISC_AUTH_ATTR(_name, _mode) TF_DISC_ATTR(iscsi, _name, _mode)
+#define DISC_AUTH_ATTR_RO(_name) TF_DISC_ATTR_RO(iscsi, _name)
+
+/*
+ * One-way authentication userid
+ */
+DEF_DISC_AUTH_STR(userid, NAF_USERID_SET);
+DISC_AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
+/*
+ * One-way authentication password
+ */
+DEF_DISC_AUTH_STR(password, NAF_PASSWORD_SET);
+DISC_AUTH_ATTR(password, S_IRUGO | S_IWUSR);
+/*
+ * Enforce mutual authentication
+ */
+DEF_DISC_AUTH_INT(authenticate_target);
+DISC_AUTH_ATTR_RO(authenticate_target);
+/*
+ * Mutual authentication userid
+ */
+DEF_DISC_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
+DISC_AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
+/*
+ * Mutual authentication password
+ */
+DEF_DISC_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
+DISC_AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
+
+/*
+ * enforce_discovery_auth
+ */
+static ssize_t iscsi_disc_show_enforce_discovery_auth(
+ struct target_fabric_configfs *tf,
+ char *page)
+{
+ struct iscsi_node_auth *discovery_auth = &iscsit_global->discovery_acl.node_auth;
+
+ return sprintf(page, "%d\n", discovery_auth->enforce_discovery_auth);
+}
+
+static ssize_t iscsi_disc_store_enforce_discovery_auth(
+ struct target_fabric_configfs *tf,
+ const char *page,
+ size_t count)
+{
+ struct iscsi_param *param;
+ struct iscsi_portal_group *discovery_tpg = iscsit_global->discovery_tpg;
+ char *endptr;
+ u32 op;
+
+ op = simple_strtoul(page, &endptr, 0);
+ if ((op != 1) && (op != 0)) {
+ pr_err("Illegal value for enforce_discovery_auth:"
+ " %u\n", op);
+ return -EINVAL;
+ }
+
+ if (!discovery_tpg) {
+ pr_err("iscsit_global->discovery_tpg is NULL\n");
+ return -EINVAL;
+ }
+
+ param = iscsi_find_param_from_key(AUTHMETHOD,
+ discovery_tpg->param_list);
+ if (!param)
+ return -EINVAL;
+
+ if (op) {
+ /*
+ * Reset the AuthMethod key to CHAP.
+ */
+ if (iscsi_update_param_value(param, CHAP) < 0)
+ return -EINVAL;
+
+ discovery_tpg->tpg_attrib.authentication = 1;
+ iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 1;
+ pr_debug("LIO-CORE[0] Successfully enabled"
+ " authentication enforcement for iSCSI"
+ " Discovery TPG\n");
+ } else {
+ /*
+ * Reset the AuthMethod key to CHAP,None
+ */
+ if (iscsi_update_param_value(param, "CHAP,None") < 0)
+ return -EINVAL;
+
+ discovery_tpg->tpg_attrib.authentication = 0;
+ iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 0;
+ pr_debug("LIO-CORE[0] Successfully disabled"
+ " authentication enforcement for iSCSI"
+ " Discovery TPG\n");
+ }
+
+ return count;
+}
+
+DISC_AUTH_ATTR(enforce_discovery_auth, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_discovery_auth_attrs[] = {
+ &iscsi_disc_userid.attr,
+ &iscsi_disc_password.attr,
+ &iscsi_disc_authenticate_target.attr,
+ &iscsi_disc_userid_mutual.attr,
+ &iscsi_disc_password_mutual.attr,
+ &iscsi_disc_enforce_discovery_auth.attr,
+ NULL,
+};
+
+/* End lio_target_discovery_auth_cit */
+
+/* Start functions for target_core_fabric_ops */
+
+static char *iscsi_get_fabric_name(void)
+{
+ return "iSCSI";
+}
+
+static u32 iscsi_get_task_tag(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ return cmd->init_task_tag;
+}
+
+static int iscsi_get_cmd_state(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ return cmd->i_state;
+}
+
+static u32 lio_sess_get_index(struct se_session *se_sess)
+{
+ struct iscsi_session *sess = se_sess->fabric_sess_ptr;
+
+ return sess->session_index;
+}
+
+static u32 lio_sess_get_initiator_sid(
+ struct se_session *se_sess,
+ unsigned char *buf,
+ u32 size)
+{
+ struct iscsi_session *sess = se_sess->fabric_sess_ptr;
+ /*
+ * iSCSI Initiator Session Identifier from RFC-3720.
+ */
+ return snprintf(buf, size, "%02x%02x%02x%02x%02x%02x",
+ sess->isid[0], sess->isid[1], sess->isid[2],
+ sess->isid[3], sess->isid[4], sess->isid[5]);
+}
+
+static int lio_queue_data_in(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ cmd->i_state = ISTATE_SEND_DATAIN;
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
+ return 0;
+}
+
+static int lio_write_pending(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ if (!cmd->immediate_data && !cmd->unsolicited_data)
+ return iscsit_build_r2ts_for_cmd(cmd, cmd->conn, 1);
+
+ return 0;
+}
+
+static int lio_write_pending_status(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+ int ret;
+
+ spin_lock_bh(&cmd->istate_lock);
+ ret = !(cmd->cmd_flags & ICF_GOT_LAST_DATAOUT);
+ spin_unlock_bh(&cmd->istate_lock);
+
+ return ret;
+}
+
+static int lio_queue_status(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ cmd->i_state = ISTATE_SEND_STATUS;
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
+ return 0;
+}
+
+static u16 lio_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
+{
+ unsigned char *buffer = se_cmd->sense_buffer;
+ /*
+ * From RFC-3720 10.4.7. Data Segment - Sense and Response Data Segment
+ * 16-bit SenseLength.
+ */
+ buffer[0] = ((sense_length >> 8) & 0xff);
+ buffer[1] = (sense_length & 0xff);
+ /*
+ * Return two byte offset into allocated sense_buffer.
+ */
+ return 2;
+}
+
+static u16 lio_get_fabric_sense_len(void)
+{
+ /*
+ * Return two byte offset into allocated sense_buffer.
+ */
+ return 2;
+}
+
+static int lio_queue_tm_rsp(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ cmd->i_state = ISTATE_SEND_TASKMGTRSP;
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
+ return 0;
+}
+
+static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return &tpg->tpg_tiqn->tiqn[0];
+}
+
+static u16 lio_tpg_get_tag(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return tpg->tpgt;
+}
+
+static u32 lio_tpg_get_default_depth(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
+}
+
+static int lio_tpg_check_demo_mode(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return ISCSI_TPG_ATTRIB(tpg)->generate_node_acls;
+}
+
+static int lio_tpg_check_demo_mode_cache(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return ISCSI_TPG_ATTRIB(tpg)->cache_dynamic_acls;
+}
+
+static int lio_tpg_check_demo_mode_write_protect(
+ struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return ISCSI_TPG_ATTRIB(tpg)->demo_mode_write_protect;
+}
+
+static int lio_tpg_check_prod_mode_write_protect(
+ struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return ISCSI_TPG_ATTRIB(tpg)->prod_mode_write_protect;
+}
+
+static void lio_tpg_release_fabric_acl(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_acl)
+{
+ struct iscsi_node_acl *acl = container_of(se_acl,
+ struct iscsi_node_acl, se_node_acl);
+ kfree(acl);
+}
+
+/*
+ * Called with spin_lock_bh(struct se_portal_group->session_lock) held..
+ *
+ * Also, this function calls iscsit_inc_session_usage_count() on the
+ * struct iscsi_session in question.
+ */
+static int lio_tpg_shutdown_session(struct se_session *se_sess)
+{
+ struct iscsi_session *sess = se_sess->fabric_sess_ptr;
+
+ spin_lock(&sess->conn_lock);
+ if (atomic_read(&sess->session_fall_back_to_erl0) ||
+ atomic_read(&sess->session_logout) ||
+ (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
+ spin_unlock(&sess->conn_lock);
+ return 0;
+ }
+ atomic_set(&sess->session_reinstatement, 1);
+ spin_unlock(&sess->conn_lock);
+
+ iscsit_stop_time2retain_timer(sess);
+ iscsit_stop_session(sess, 1, 1);
+
+ return 1;
+}
+
+/*
+ * Calls iscsit_dec_session_usage_count() as inverse of
+ * lio_tpg_shutdown_session()
+ */
+static void lio_tpg_close_session(struct se_session *se_sess)
+{
+ struct iscsi_session *sess = se_sess->fabric_sess_ptr;
+ /*
+ * If the iSCSI Session for the iSCSI Initiator Node exists,
+ * forcefully shutdown the iSCSI NEXUS.
+ */
+ iscsit_close_session(sess);
+}
+
+static u32 lio_tpg_get_inst_index(struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return tpg->tpg_tiqn->tiqn_index;
+}
+
+static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
+{
+ struct iscsi_node_acl *acl = container_of(se_acl, struct iscsi_node_acl,
+ se_node_acl);
+
+ ISCSI_NODE_ATTRIB(acl)->nacl = acl;
+ iscsit_set_default_node_attribues(acl);
+}
+
+static void lio_release_cmd(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ iscsit_release_cmd(cmd);
+}
+
+/* End functions for target_core_fabric_ops */
+
+int iscsi_target_register_configfs(void)
+{
+ struct target_fabric_configfs *fabric;
+ int ret;
+
+ lio_target_fabric_configfs = NULL;
+ fabric = target_fabric_configfs_init(THIS_MODULE, "iscsi");
+ if (IS_ERR(fabric)) {
+ pr_err("target_fabric_configfs_init() for"
+ " LIO-Target failed!\n");
+ return PTR_ERR(fabric);
+ }
+ /*
+ * Setup the fabric API of function pointers used by target_core_mod..
+ */
+ fabric->tf_ops.get_fabric_name = &iscsi_get_fabric_name;
+ fabric->tf_ops.get_fabric_proto_ident = &iscsi_get_fabric_proto_ident;
+ fabric->tf_ops.tpg_get_wwn = &lio_tpg_get_endpoint_wwn;
+ fabric->tf_ops.tpg_get_tag = &lio_tpg_get_tag;
+ fabric->tf_ops.tpg_get_default_depth = &lio_tpg_get_default_depth;
+ fabric->tf_ops.tpg_get_pr_transport_id = &iscsi_get_pr_transport_id;
+ fabric->tf_ops.tpg_get_pr_transport_id_len =
+ &iscsi_get_pr_transport_id_len;
+ fabric->tf_ops.tpg_parse_pr_out_transport_id =
+ &iscsi_parse_pr_out_transport_id;
+ fabric->tf_ops.tpg_check_demo_mode = &lio_tpg_check_demo_mode;
+ fabric->tf_ops.tpg_check_demo_mode_cache =
+ &lio_tpg_check_demo_mode_cache;
+ fabric->tf_ops.tpg_check_demo_mode_write_protect =
+ &lio_tpg_check_demo_mode_write_protect;
+ fabric->tf_ops.tpg_check_prod_mode_write_protect =
+ &lio_tpg_check_prod_mode_write_protect;
+ fabric->tf_ops.tpg_alloc_fabric_acl = &lio_tpg_alloc_fabric_acl;
+ fabric->tf_ops.tpg_release_fabric_acl = &lio_tpg_release_fabric_acl;
+ fabric->tf_ops.tpg_get_inst_index = &lio_tpg_get_inst_index;
+ fabric->tf_ops.release_cmd = &lio_release_cmd;
+ fabric->tf_ops.shutdown_session = &lio_tpg_shutdown_session;
+ fabric->tf_ops.close_session = &lio_tpg_close_session;
+ fabric->tf_ops.sess_get_index = &lio_sess_get_index;
+ fabric->tf_ops.sess_get_initiator_sid = &lio_sess_get_initiator_sid;
+ fabric->tf_ops.write_pending = &lio_write_pending;
+ fabric->tf_ops.write_pending_status = &lio_write_pending_status;
+ fabric->tf_ops.set_default_node_attributes =
+ &lio_set_default_node_attributes;
+ fabric->tf_ops.get_task_tag = &iscsi_get_task_tag;
+ fabric->tf_ops.get_cmd_state = &iscsi_get_cmd_state;
+ fabric->tf_ops.queue_data_in = &lio_queue_data_in;
+ fabric->tf_ops.queue_status = &lio_queue_status;
+ fabric->tf_ops.queue_tm_rsp = &lio_queue_tm_rsp;
+ fabric->tf_ops.set_fabric_sense_len = &lio_set_fabric_sense_len;
+ fabric->tf_ops.get_fabric_sense_len = &lio_get_fabric_sense_len;
+ /*
+ * Setup function pointers for generic logic in target_core_fabric_configfs.c
+ */
+ fabric->tf_ops.fabric_make_wwn = &lio_target_call_coreaddtiqn;
+ fabric->tf_ops.fabric_drop_wwn = &lio_target_call_coredeltiqn;
+ fabric->tf_ops.fabric_make_tpg = &lio_target_tiqn_addtpg;
+ fabric->tf_ops.fabric_drop_tpg = &lio_target_tiqn_deltpg;
+ fabric->tf_ops.fabric_post_link = NULL;
+ fabric->tf_ops.fabric_pre_unlink = NULL;
+ fabric->tf_ops.fabric_make_np = &lio_target_call_addnptotpg;
+ fabric->tf_ops.fabric_drop_np = &lio_target_call_delnpfromtpg;
+ fabric->tf_ops.fabric_make_nodeacl = &lio_target_make_nodeacl;
+ fabric->tf_ops.fabric_drop_nodeacl = &lio_target_drop_nodeacl;
+ /*
+ * Setup default attribute lists for various fabric->tf_cit_tmpl
+ * sturct config_item_type's
+ */
+ TF_CIT_TMPL(fabric)->tfc_discovery_cit.ct_attrs = lio_target_discovery_auth_attrs;
+ TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = lio_target_wwn_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = lio_target_tpg_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = lio_target_tpg_attrib_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = lio_target_tpg_param_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = lio_target_portal_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = lio_target_initiator_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = lio_target_nacl_attrib_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = lio_target_nacl_auth_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = lio_target_nacl_param_attrs;
+
+ ret = target_fabric_configfs_register(fabric);
+ if (ret < 0) {
+ pr_err("target_fabric_configfs_register() for"
+ " LIO-Target failed!\n");
+ target_fabric_configfs_free(fabric);
+ return ret;
+ }
+
+ lio_target_fabric_configfs = fabric;
+ pr_debug("LIO_TARGET[0] - Set fabric ->"
+ " lio_target_fabric_configfs\n");
+ return 0;
+}
+
+
+void iscsi_target_deregister_configfs(void)
+{
+ if (!lio_target_fabric_configfs)
+ return;
+ /*
+ * Shutdown discovery sessions and disable discovery TPG
+ */
+ if (iscsit_global->discovery_tpg)
+ iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
+
+ target_fabric_configfs_deregister(lio_target_fabric_configfs);
+ lio_target_fabric_configfs = NULL;
+ pr_debug("LIO_TARGET[0] - Cleared"
+ " lio_target_fabric_configfs\n");
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.h
new file mode 100644
index 0000000..8cd5a63
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_configfs.h
@@ -0,0 +1,7 @@
+#ifndef ISCSI_TARGET_CONFIGFS_H
+#define ISCSI_TARGET_CONFIGFS_H
+
+extern int iscsi_target_register_configfs(void);
+extern void iscsi_target_deregister_configfs(void);
+
+#endif /* ISCSI_TARGET_CONFIGFS_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_core.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_core.h
new file mode 100644
index 0000000..2e46ea4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_core.h
@@ -0,0 +1,859 @@
+#ifndef ISCSI_TARGET_CORE_H
+#define ISCSI_TARGET_CORE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+
+#define ISCSIT_VERSION "v4.1.0-rc2"
+#define ISCSI_MAX_DATASN_MISSING_COUNT 16
+#define ISCSI_TX_THREAD_TCP_TIMEOUT 2
+#define ISCSI_RX_THREAD_TCP_TIMEOUT 2
+#define SECONDS_FOR_ASYNC_LOGOUT 10
+#define SECONDS_FOR_ASYNC_TEXT 10
+#define SECONDS_FOR_LOGOUT_COMP 15
+#define WHITE_SPACE " \t\v\f\n\r"
+
+/* struct iscsi_node_attrib sanity values */
+#define NA_DATAOUT_TIMEOUT 3
+#define NA_DATAOUT_TIMEOUT_MAX 60
+#define NA_DATAOUT_TIMEOUT_MIX 2
+#define NA_DATAOUT_TIMEOUT_RETRIES 5
+#define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
+#define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
+#define NA_NOPIN_TIMEOUT 15
+#define NA_NOPIN_TIMEOUT_MAX 60
+#define NA_NOPIN_TIMEOUT_MIN 3
+#define NA_NOPIN_RESPONSE_TIMEOUT 30
+#define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
+#define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
+#define NA_RANDOM_DATAIN_PDU_OFFSETS 0
+#define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
+#define NA_RANDOM_R2T_OFFSETS 0
+#define NA_DEFAULT_ERL 0
+#define NA_DEFAULT_ERL_MAX 2
+#define NA_DEFAULT_ERL_MIN 0
+
+/* struct iscsi_tpg_attrib sanity values */
+#define TA_AUTHENTICATION 1
+#define TA_LOGIN_TIMEOUT 15
+#define TA_LOGIN_TIMEOUT_MAX 30
+#define TA_LOGIN_TIMEOUT_MIN 5
+#define TA_NETIF_TIMEOUT 2
+#define TA_NETIF_TIMEOUT_MAX 15
+#define TA_NETIF_TIMEOUT_MIN 2
+#define TA_GENERATE_NODE_ACLS 0
+#define TA_DEFAULT_CMDSN_DEPTH 16
+#define TA_DEFAULT_CMDSN_DEPTH_MAX 512
+#define TA_DEFAULT_CMDSN_DEPTH_MIN 1
+#define TA_CACHE_DYNAMIC_ACLS 0
+/* Enabled by default in demo mode (generic_node_acls=1) */
+#define TA_DEMO_MODE_WRITE_PROTECT 1
+/* Disabled by default in production mode w/ explict ACLs */
+#define TA_PROD_MODE_WRITE_PROTECT 0
+#define TA_CACHE_CORE_NPS 0
+
+
+#define ISCSI_IOV_DATA_BUFFER 5
+
+enum tpg_np_network_transport_table {
+ ISCSI_TCP = 0,
+ ISCSI_SCTP_TCP = 1,
+ ISCSI_SCTP_UDP = 2,
+ ISCSI_IWARP_TCP = 3,
+ ISCSI_IWARP_SCTP = 4,
+ ISCSI_INFINIBAND = 5,
+};
+
+/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
+enum target_conn_state_table {
+ TARG_CONN_STATE_FREE = 0x1,
+ TARG_CONN_STATE_XPT_UP = 0x3,
+ TARG_CONN_STATE_IN_LOGIN = 0x4,
+ TARG_CONN_STATE_LOGGED_IN = 0x5,
+ TARG_CONN_STATE_IN_LOGOUT = 0x6,
+ TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
+ TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
+};
+
+/* RFC-3720 7.3.2 Session State Diagram for a Target */
+enum target_sess_state_table {
+ TARG_SESS_STATE_FREE = 0x1,
+ TARG_SESS_STATE_ACTIVE = 0x2,
+ TARG_SESS_STATE_LOGGED_IN = 0x3,
+ TARG_SESS_STATE_FAILED = 0x4,
+ TARG_SESS_STATE_IN_CONTINUE = 0x5,
+};
+
+/* struct iscsi_data_count->type */
+enum data_count_type {
+ ISCSI_RX_DATA = 1,
+ ISCSI_TX_DATA = 2,
+};
+
+/* struct iscsi_datain_req->dr_complete */
+enum datain_req_comp_table {
+ DATAIN_COMPLETE_NORMAL = 1,
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
+ DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
+};
+
+/* struct iscsi_datain_req->recovery */
+enum datain_req_rec_table {
+ DATAIN_WITHIN_COMMAND_RECOVERY = 1,
+ DATAIN_CONNECTION_RECOVERY = 2,
+};
+
+/* struct iscsi_portal_group->state */
+enum tpg_state_table {
+ TPG_STATE_FREE = 0,
+ TPG_STATE_ACTIVE = 1,
+ TPG_STATE_INACTIVE = 2,
+ TPG_STATE_COLD_RESET = 3,
+};
+
+/* struct iscsi_tiqn->tiqn_state */
+enum tiqn_state_table {
+ TIQN_STATE_ACTIVE = 1,
+ TIQN_STATE_SHUTDOWN = 2,
+};
+
+/* struct iscsi_cmd->cmd_flags */
+enum cmd_flags_table {
+ ICF_GOT_LAST_DATAOUT = 0x00000001,
+ ICF_GOT_DATACK_SNACK = 0x00000002,
+ ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
+ ICF_SENT_LAST_R2T = 0x00000008,
+ ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
+ ICF_CONTIG_MEMORY = 0x00000020,
+ ICF_ATTACHED_TO_RQUEUE = 0x00000040,
+ ICF_OOO_CMDSN = 0x00000080,
+ ICF_REJECT_FAIL_CONN = 0x00000100,
+};
+
+/* struct iscsi_cmd->i_state */
+enum cmd_i_state_table {
+ ISTATE_NO_STATE = 0,
+ ISTATE_NEW_CMD = 1,
+ ISTATE_DEFERRED_CMD = 2,
+ ISTATE_UNSOLICITED_DATA = 3,
+ ISTATE_RECEIVE_DATAOUT = 4,
+ ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
+ ISTATE_RECEIVED_LAST_DATAOUT = 6,
+ ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
+ ISTATE_IN_CONNECTION_RECOVERY = 8,
+ ISTATE_RECEIVED_TASKMGT = 9,
+ ISTATE_SEND_ASYNCMSG = 10,
+ ISTATE_SENT_ASYNCMSG = 11,
+ ISTATE_SEND_DATAIN = 12,
+ ISTATE_SEND_LAST_DATAIN = 13,
+ ISTATE_SENT_LAST_DATAIN = 14,
+ ISTATE_SEND_LOGOUTRSP = 15,
+ ISTATE_SENT_LOGOUTRSP = 16,
+ ISTATE_SEND_NOPIN = 17,
+ ISTATE_SENT_NOPIN = 18,
+ ISTATE_SEND_REJECT = 19,
+ ISTATE_SENT_REJECT = 20,
+ ISTATE_SEND_R2T = 21,
+ ISTATE_SENT_R2T = 22,
+ ISTATE_SEND_R2T_RECOVERY = 23,
+ ISTATE_SENT_R2T_RECOVERY = 24,
+ ISTATE_SEND_LAST_R2T = 25,
+ ISTATE_SENT_LAST_R2T = 26,
+ ISTATE_SEND_LAST_R2T_RECOVERY = 27,
+ ISTATE_SENT_LAST_R2T_RECOVERY = 28,
+ ISTATE_SEND_STATUS = 29,
+ ISTATE_SEND_STATUS_BROKEN_PC = 30,
+ ISTATE_SENT_STATUS = 31,
+ ISTATE_SEND_STATUS_RECOVERY = 32,
+ ISTATE_SENT_STATUS_RECOVERY = 33,
+ ISTATE_SEND_TASKMGTRSP = 34,
+ ISTATE_SENT_TASKMGTRSP = 35,
+ ISTATE_SEND_TEXTRSP = 36,
+ ISTATE_SENT_TEXTRSP = 37,
+ ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
+ ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
+ ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
+ ISTATE_REMOVE = 41,
+ ISTATE_FREE = 42,
+};
+
+/* Used for iscsi_recover_cmdsn() return values */
+enum recover_cmdsn_ret_table {
+ CMDSN_ERROR_CANNOT_RECOVER = -1,
+ CMDSN_NORMAL_OPERATION = 0,
+ CMDSN_LOWER_THAN_EXP = 1,
+ CMDSN_HIGHER_THAN_EXP = 2,
+};
+
+/* Used for iscsi_handle_immediate_data() return values */
+enum immedate_data_ret_table {
+ IMMEDIATE_DATA_CANNOT_RECOVER = -1,
+ IMMEDIATE_DATA_NORMAL_OPERATION = 0,
+ IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
+};
+
+/* Used for iscsi_decide_dataout_action() return values */
+enum dataout_action_ret_table {
+ DATAOUT_CANNOT_RECOVER = -1,
+ DATAOUT_NORMAL = 0,
+ DATAOUT_SEND_R2T = 1,
+ DATAOUT_SEND_TO_TRANSPORT = 2,
+ DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
+};
+
+/* Used for struct iscsi_node_auth->naf_flags */
+enum naf_flags_table {
+ NAF_USERID_SET = 0x01,
+ NAF_PASSWORD_SET = 0x02,
+ NAF_USERID_IN_SET = 0x04,
+ NAF_PASSWORD_IN_SET = 0x08,
+};
+
+/* Used by various struct timer_list to manage iSCSI specific state */
+enum iscsi_timer_flags_table {
+ ISCSI_TF_RUNNING = 0x01,
+ ISCSI_TF_STOP = 0x02,
+ ISCSI_TF_EXPIRED = 0x04,
+};
+
+/* Used for struct iscsi_np->np_flags */
+enum np_flags_table {
+ NPF_IP_NETWORK = 0x00,
+};
+
+/* Used for struct iscsi_np->np_thread_state */
+enum np_thread_state_table {
+ ISCSI_NP_THREAD_ACTIVE = 1,
+ ISCSI_NP_THREAD_INACTIVE = 2,
+ ISCSI_NP_THREAD_RESET = 3,
+ ISCSI_NP_THREAD_SHUTDOWN = 4,
+ ISCSI_NP_THREAD_EXIT = 5,
+};
+
+struct iscsi_conn_ops {
+ u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
+ u8 DataDigest; /* [0,1] == [None,CRC32C] */
+ u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
+ u8 OFMarker; /* [0,1] == [No,Yes] */
+ u8 IFMarker; /* [0,1] == [No,Yes] */
+ u32 OFMarkInt; /* [1..65535] */
+ u32 IFMarkInt; /* [1..65535] */
+};
+
+struct iscsi_sess_ops {
+ char InitiatorName[224];
+ char InitiatorAlias[256];
+ char TargetName[224];
+ char TargetAlias[256];
+ char TargetAddress[256];
+ u16 TargetPortalGroupTag; /* [0..65535] */
+ u16 MaxConnections; /* [1..65535] */
+ u8 InitialR2T; /* [0,1] == [No,Yes] */
+ u8 ImmediateData; /* [0,1] == [No,Yes] */
+ u32 MaxBurstLength; /* [512..2**24-1] */
+ u32 FirstBurstLength; /* [512..2**24-1] */
+ u16 DefaultTime2Wait; /* [0..3600] */
+ u16 DefaultTime2Retain; /* [0..3600] */
+ u16 MaxOutstandingR2T; /* [1..65535] */
+ u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
+ u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
+ u8 ErrorRecoveryLevel; /* [0..2] */
+ u8 SessionType; /* [0,1] == [Normal,Discovery]*/
+};
+
+struct iscsi_queue_req {
+ int state;
+ struct iscsi_cmd *cmd;
+ struct list_head qr_list;
+};
+
+struct iscsi_data_count {
+ int data_length;
+ int sync_and_steering;
+ enum data_count_type type;
+ u32 iov_count;
+ u32 ss_iov_count;
+ u32 ss_marker_count;
+ struct kvec *iov;
+};
+
+struct iscsi_param_list {
+ struct list_head param_list;
+ struct list_head extra_response_list;
+};
+
+struct iscsi_datain_req {
+ enum datain_req_comp_table dr_complete;
+ int generate_recovery_values;
+ enum datain_req_rec_table recovery;
+ u32 begrun;
+ u32 runlength;
+ u32 data_length;
+ u32 data_offset;
+ u32 data_offset_end;
+ u32 data_sn;
+ u32 next_burst_len;
+ u32 read_data_done;
+ u32 seq_send_order;
+ struct list_head dr_list;
+} ____cacheline_aligned;
+
+struct iscsi_ooo_cmdsn {
+ u16 cid;
+ u32 batch_count;
+ u32 cmdsn;
+ u32 exp_cmdsn;
+ struct iscsi_cmd *cmd;
+ struct list_head ooo_list;
+} ____cacheline_aligned;
+
+struct iscsi_datain {
+ u8 flags;
+ u32 data_sn;
+ u32 length;
+ u32 offset;
+} ____cacheline_aligned;
+
+struct iscsi_r2t {
+ int seq_complete;
+ int recovery_r2t;
+ int sent_r2t;
+ u32 r2t_sn;
+ u32 offset;
+ u32 targ_xfer_tag;
+ u32 xfer_len;
+ struct list_head r2t_list;
+} ____cacheline_aligned;
+
+struct iscsi_cmd {
+ enum iscsi_timer_flags_table dataout_timer_flags;
+ /* DataOUT timeout retries */
+ u8 dataout_timeout_retries;
+ /* Within command recovery count */
+ u8 error_recovery_count;
+ /* iSCSI dependent state for out or order CmdSNs */
+ enum cmd_i_state_table deferred_i_state;
+ /* iSCSI dependent state */
+ enum cmd_i_state_table i_state;
+ /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
+ u8 immediate_cmd;
+ /* Immediate data present */
+ u8 immediate_data;
+ /* iSCSI Opcode */
+ u8 iscsi_opcode;
+ /* iSCSI Response Code */
+ u8 iscsi_response;
+ /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
+ u8 logout_reason;
+ /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
+ u8 logout_response;
+ /* MaxCmdSN has been incremented */
+ u8 maxcmdsn_inc;
+ /* Immediate Unsolicited Dataout */
+ u8 unsolicited_data;
+ /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
+ u16 logout_cid;
+ /* Command flags */
+ enum cmd_flags_table cmd_flags;
+ /* Initiator Task Tag assigned from Initiator */
+ u32 init_task_tag;
+ /* Target Transfer Tag assigned from Target */
+ u32 targ_xfer_tag;
+ /* CmdSN assigned from Initiator */
+ u32 cmd_sn;
+ /* ExpStatSN assigned from Initiator */
+ u32 exp_stat_sn;
+ /* StatSN assigned to this ITT */
+ u32 stat_sn;
+ /* DataSN Counter */
+ u32 data_sn;
+ /* R2TSN Counter */
+ u32 r2t_sn;
+ /* Last DataSN acknowledged via DataAck SNACK */
+ u32 acked_data_sn;
+ /* Used for echoing NOPOUT ping data */
+ u32 buf_ptr_size;
+ /* Used to store DataDigest */
+ u32 data_crc;
+ /* Total size in bytes associated with command */
+ u32 data_length;
+ /* Counter for MaxOutstandingR2T */
+ u32 outstanding_r2ts;
+ /* Next R2T Offset when DataSequenceInOrder=Yes */
+ u32 r2t_offset;
+ /* Iovec current and orig count for iscsi_cmd->iov_data */
+ u32 iov_data_count;
+ u32 orig_iov_data_count;
+ /* Number of miscellaneous iovecs used for IP stack calls */
+ u32 iov_misc_count;
+ /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
+ u32 pdu_count;
+ /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
+ u32 pdu_send_order;
+ /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
+ u32 pdu_start;
+ /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
+ u32 seq_send_order;
+ /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
+ u32 seq_count;
+ /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
+ u32 seq_no;
+ /* Lowest offset in current DataOUT sequence */
+ u32 seq_start_offset;
+ /* Highest offset in current DataOUT sequence */
+ u32 seq_end_offset;
+ /* Total size in bytes received so far of READ data */
+ u32 read_data_done;
+ /* Total size in bytes received so far of WRITE data */
+ u32 write_data_done;
+ /* Counter for FirstBurstLength key */
+ u32 first_burst_len;
+ /* Counter for MaxBurstLength key */
+ u32 next_burst_len;
+ /* Transfer size used for IP stack calls */
+ u32 tx_size;
+ /* Buffer used for various purposes */
+ void *buf_ptr;
+ /* See include/linux/dma-mapping.h */
+ enum dma_data_direction data_direction;
+ /* iSCSI PDU Header + CRC */
+ unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
+ /* Number of times struct iscsi_cmd is present in immediate queue */
+ atomic_t immed_queue_count;
+ atomic_t response_queue_count;
+ spinlock_t datain_lock;
+ spinlock_t dataout_timeout_lock;
+ /* spinlock for protecting struct iscsi_cmd->i_state */
+ spinlock_t istate_lock;
+ /* spinlock for adding within command recovery entries */
+ spinlock_t error_lock;
+ /* spinlock for adding R2Ts */
+ spinlock_t r2t_lock;
+ /* DataIN List */
+ struct list_head datain_list;
+ /* R2T List */
+ struct list_head cmd_r2t_list;
+ struct completion reject_comp;
+ /* Timer for DataOUT */
+ struct timer_list dataout_timer;
+ /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
+ struct kvec *iov_data;
+ /* Iovecs for miscellaneous purposes */
+#define ISCSI_MISC_IOVECS 5
+ struct kvec iov_misc[ISCSI_MISC_IOVECS];
+ /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
+ struct iscsi_pdu *pdu_list;
+ /* Current struct iscsi_pdu used for DataPDUInOrder=No */
+ struct iscsi_pdu *pdu_ptr;
+ /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
+ struct iscsi_seq *seq_list;
+ /* Current struct iscsi_seq used for DataSequenceInOrder=No */
+ struct iscsi_seq *seq_ptr;
+ /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
+ struct iscsi_tmr_req *tmr_req;
+ /* Connection this command is alligient to */
+ struct iscsi_conn *conn;
+ /* Pointer to connection recovery entry */
+ struct iscsi_conn_recovery *cr;
+ /* Session the command is part of, used for connection recovery */
+ struct iscsi_session *sess;
+ /* list_head for connection list */
+ struct list_head i_list;
+ /* The TCM I/O descriptor that is accessed via container_of() */
+ struct se_cmd se_cmd;
+ /* Sense buffer that will be mapped into outgoing status */
+#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
+ unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
+
+ struct scatterlist *t_mem_sg;
+ u32 t_mem_sg_nents;
+
+ u32 padding;
+ u8 pad_bytes[4];
+
+ struct scatterlist *first_data_sg;
+ u32 first_data_sg_off;
+ u32 kmapped_nents;
+
+} ____cacheline_aligned;
+
+struct iscsi_tmr_req {
+ bool task_reassign:1;
+ u32 ref_cmd_sn;
+ u32 exp_data_sn;
+ struct iscsi_conn_recovery *conn_recovery;
+ struct se_tmr_req *se_tmr_req;
+};
+
+struct iscsi_conn {
+ wait_queue_head_t queues_wq;
+ /* Authentication Successful for this connection */
+ u8 auth_complete;
+ /* State connection is currently in */
+ u8 conn_state;
+ u8 conn_logout_reason;
+ u8 network_transport;
+ enum iscsi_timer_flags_table nopin_timer_flags;
+ enum iscsi_timer_flags_table nopin_response_timer_flags;
+ u8 tx_immediate_queue;
+ u8 tx_response_queue;
+ /* Used to know what thread encountered a transport failure */
+ u8 which_thread;
+ /* connection id assigned by the Initiator */
+ u16 cid;
+ /* Remote TCP Port */
+ u16 login_port;
+ u16 local_port;
+ int net_size;
+ u32 auth_id;
+ u32 conn_flags;
+ /* Used for iscsi_tx_login_rsp() */
+ u32 login_itt;
+ u32 exp_statsn;
+ /* Per connection status sequence number */
+ u32 stat_sn;
+ /* IFMarkInt's Current Value */
+ u32 if_marker;
+ /* OFMarkInt's Current Value */
+ u32 of_marker;
+ /* Used for calculating OFMarker offset to next PDU */
+ u32 of_marker_offset;
+ /* Complete Bad PDU for sending reject */
+ unsigned char bad_hdr[ISCSI_HDR_LEN];
+#define IPV6_ADDRESS_SPACE 48
+ unsigned char login_ip[IPV6_ADDRESS_SPACE];
+ unsigned char local_ip[IPV6_ADDRESS_SPACE];
+ int conn_usage_count;
+ int conn_waiting_on_uc;
+ atomic_t check_immediate_queue;
+ atomic_t conn_logout_remove;
+ atomic_t connection_exit;
+ atomic_t connection_recovery;
+ atomic_t connection_reinstatement;
+ atomic_t connection_wait_rcfr;
+ atomic_t sleep_on_conn_wait_comp;
+ atomic_t transport_failed;
+ struct completion conn_post_wait_comp;
+ struct completion conn_wait_comp;
+ struct completion conn_wait_rcfr_comp;
+ struct completion conn_waiting_on_uc_comp;
+ struct completion conn_logout_comp;
+ struct completion tx_half_close_comp;
+ struct completion rx_half_close_comp;
+ /* socket used by this connection */
+ struct socket *sock;
+ struct timer_list nopin_timer;
+ struct timer_list nopin_response_timer;
+ struct timer_list transport_timer;
+ /* Spinlock used for add/deleting cmd's from conn_cmd_list */
+ spinlock_t cmd_lock;
+ spinlock_t conn_usage_lock;
+ spinlock_t immed_queue_lock;
+ spinlock_t nopin_timer_lock;
+ spinlock_t response_queue_lock;
+ spinlock_t state_lock;
+ /* libcrypto RX and TX contexts for crc32c */
+ struct hash_desc conn_rx_hash;
+ struct hash_desc conn_tx_hash;
+ /* Used for scheduling TX and RX connection kthreads */
+ cpumask_var_t conn_cpumask;
+ unsigned int conn_rx_reset_cpumask:1;
+ unsigned int conn_tx_reset_cpumask:1;
+ /* list_head of struct iscsi_cmd for this connection */
+ struct list_head conn_cmd_list;
+ struct list_head immed_queue_list;
+ struct list_head response_queue_list;
+ struct iscsi_conn_ops *conn_ops;
+ struct iscsi_param_list *param_list;
+ /* Used for per connection auth state machine */
+ void *auth_protocol;
+ struct iscsi_login_thread_s *login_thread;
+ struct iscsi_portal_group *tpg;
+ /* Pointer to parent session */
+ struct iscsi_session *sess;
+ /* Pointer to thread_set in use for this conn's threads */
+ struct iscsi_thread_set *thread_set;
+ /* list_head for session connection list */
+ struct list_head conn_list;
+} ____cacheline_aligned;
+
+struct iscsi_conn_recovery {
+ u16 cid;
+ u32 cmd_count;
+ u32 maxrecvdatasegmentlength;
+ int ready_for_reallegiance;
+ struct list_head conn_recovery_cmd_list;
+ spinlock_t conn_recovery_cmd_lock;
+ struct timer_list time2retain_timer;
+ struct iscsi_session *sess;
+ struct list_head cr_list;
+} ____cacheline_aligned;
+
+struct iscsi_session {
+ u8 initiator_vendor;
+ u8 isid[6];
+ enum iscsi_timer_flags_table time2retain_timer_flags;
+ u8 version_active;
+ u16 cid_called;
+ u16 conn_recovery_count;
+ u16 tsih;
+ /* state session is currently in */
+ u32 session_state;
+ /* session wide counter: initiator assigned task tag */
+ u32 init_task_tag;
+ /* session wide counter: target assigned task tag */
+ u32 targ_xfer_tag;
+ u32 cmdsn_window;
+
+ /* protects cmdsn values */
+ struct mutex cmdsn_mutex;
+ /* session wide counter: expected command sequence number */
+ u32 exp_cmd_sn;
+ /* session wide counter: maximum allowed command sequence number */
+ u32 max_cmd_sn;
+ struct list_head sess_ooo_cmdsn_list;
+
+ /* LIO specific session ID */
+ u32 sid;
+ char auth_type[8];
+ /* unique within the target */
+ int session_index;
+ /* Used for session reference counting */
+ int session_usage_count;
+ int session_waiting_on_uc;
+ u32 cmd_pdus;
+ u32 rsp_pdus;
+ u64 tx_data_octets;
+ u64 rx_data_octets;
+ u32 conn_digest_errors;
+ u32 conn_timeout_errors;
+ u64 creation_time;
+ spinlock_t session_stats_lock;
+ /* Number of active connections */
+ atomic_t nconn;
+ atomic_t session_continuation;
+ atomic_t session_fall_back_to_erl0;
+ atomic_t session_logout;
+ atomic_t session_reinstatement;
+ atomic_t session_stop_active;
+ atomic_t sleep_on_sess_wait_comp;
+ /* connection list */
+ struct list_head sess_conn_list;
+ struct list_head cr_active_list;
+ struct list_head cr_inactive_list;
+ spinlock_t conn_lock;
+ spinlock_t cr_a_lock;
+ spinlock_t cr_i_lock;
+ spinlock_t session_usage_lock;
+ spinlock_t ttt_lock;
+ struct completion async_msg_comp;
+ struct completion reinstatement_comp;
+ struct completion session_wait_comp;
+ struct completion session_waiting_on_uc_comp;
+ struct timer_list time2retain_timer;
+ struct iscsi_sess_ops *sess_ops;
+ struct se_session *se_sess;
+ struct iscsi_portal_group *tpg;
+} ____cacheline_aligned;
+
+struct iscsi_login {
+ u8 auth_complete;
+ u8 checked_for_existing;
+ u8 current_stage;
+ u8 leading_connection;
+ u8 first_request;
+ u8 version_min;
+ u8 version_max;
+ char isid[6];
+ u32 cmd_sn;
+ u32 init_task_tag;
+ u32 initial_exp_statsn;
+ u32 rsp_length;
+ u16 cid;
+ u16 tsih;
+ char *req;
+ char *rsp;
+ char *req_buf;
+ char *rsp_buf;
+} ____cacheline_aligned;
+
+struct iscsi_node_attrib {
+ u32 dataout_timeout;
+ u32 dataout_timeout_retries;
+ u32 default_erl;
+ u32 nopin_timeout;
+ u32 nopin_response_timeout;
+ u32 random_datain_pdu_offsets;
+ u32 random_datain_seq_offsets;
+ u32 random_r2t_offsets;
+ u32 tmr_cold_reset;
+ u32 tmr_warm_reset;
+ struct iscsi_node_acl *nacl;
+};
+
+struct se_dev_entry_s;
+
+struct iscsi_node_auth {
+ enum naf_flags_table naf_flags;
+ int authenticate_target;
+ /* Used for iscsit_global->discovery_auth,
+ * set to zero (auth disabled) by default */
+ int enforce_discovery_auth;
+#define MAX_USER_LEN 256
+#define MAX_PASS_LEN 256
+ char userid[MAX_USER_LEN];
+ char password[MAX_PASS_LEN];
+ char userid_mutual[MAX_USER_LEN];
+ char password_mutual[MAX_PASS_LEN];
+};
+
+#include "iscsi_target_stat.h"
+
+struct iscsi_node_stat_grps {
+ struct config_group iscsi_sess_stats_group;
+ struct config_group iscsi_conn_stats_group;
+};
+
+struct iscsi_node_acl {
+ struct iscsi_node_attrib node_attrib;
+ struct iscsi_node_auth node_auth;
+ struct iscsi_node_stat_grps node_stat_grps;
+ struct se_node_acl se_node_acl;
+};
+
+#define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
+
+#define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
+#define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
+
+struct iscsi_tpg_attrib {
+ u32 authentication;
+ u32 login_timeout;
+ u32 netif_timeout;
+ u32 generate_node_acls;
+ u32 cache_dynamic_acls;
+ u32 default_cmdsn_depth;
+ u32 demo_mode_write_protect;
+ u32 prod_mode_write_protect;
+ struct iscsi_portal_group *tpg;
+};
+
+struct iscsi_np {
+ int np_network_transport;
+ int np_ip_proto;
+ int np_sock_type;
+ enum np_thread_state_table np_thread_state;
+ enum iscsi_timer_flags_table np_login_timer_flags;
+ u32 np_exports;
+ enum np_flags_table np_flags;
+ unsigned char np_ip[IPV6_ADDRESS_SPACE];
+ u16 np_port;
+ spinlock_t np_thread_lock;
+ struct completion np_restart_comp;
+ struct socket *np_socket;
+ struct __kernel_sockaddr_storage np_sockaddr;
+ struct task_struct *np_thread;
+ struct timer_list np_login_timer;
+ struct iscsi_portal_group *np_login_tpg;
+ struct list_head np_list;
+} ____cacheline_aligned;
+
+struct iscsi_tpg_np {
+ struct iscsi_np *tpg_np;
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tpg_np *tpg_np_parent;
+ struct list_head tpg_np_list;
+ struct list_head tpg_np_child_list;
+ struct list_head tpg_np_parent_list;
+ struct se_tpg_np se_tpg_np;
+ spinlock_t tpg_np_parent_lock;
+};
+
+struct iscsi_portal_group {
+ unsigned char tpg_chap_id;
+ /* TPG State */
+ enum tpg_state_table tpg_state;
+ /* Target Portal Group Tag */
+ u16 tpgt;
+ /* Id assigned to target sessions */
+ u16 ntsih;
+ /* Number of active sessions */
+ u32 nsessions;
+ /* Number of Network Portals available for this TPG */
+ u32 num_tpg_nps;
+ /* Per TPG LIO specific session ID. */
+ u32 sid;
+ /* Spinlock for adding/removing Network Portals */
+ spinlock_t tpg_np_lock;
+ spinlock_t tpg_state_lock;
+ struct se_portal_group tpg_se_tpg;
+ struct mutex tpg_access_lock;
+ struct mutex np_login_lock;
+ struct iscsi_tpg_attrib tpg_attrib;
+ /* Pointer to default list of iSCSI parameters for TPG */
+ struct iscsi_param_list *param_list;
+ struct iscsi_tiqn *tpg_tiqn;
+ struct list_head tpg_gnp_list;
+ struct list_head tpg_list;
+} ____cacheline_aligned;
+
+#define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
+#define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
+#define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
+#define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
+#define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
+
+struct iscsi_wwn_stat_grps {
+ struct config_group iscsi_stat_group;
+ struct config_group iscsi_instance_group;
+ struct config_group iscsi_sess_err_group;
+ struct config_group iscsi_tgt_attr_group;
+ struct config_group iscsi_login_stats_group;
+ struct config_group iscsi_logout_stats_group;
+};
+
+struct iscsi_tiqn {
+#define ISCSI_IQN_LEN 224
+ unsigned char tiqn[ISCSI_IQN_LEN];
+ enum tiqn_state_table tiqn_state;
+ int tiqn_access_count;
+ u32 tiqn_active_tpgs;
+ u32 tiqn_ntpgs;
+ u32 tiqn_num_tpg_nps;
+ u32 tiqn_nsessions;
+ struct list_head tiqn_list;
+ struct list_head tiqn_tpg_list;
+ spinlock_t tiqn_state_lock;
+ spinlock_t tiqn_tpg_lock;
+ struct se_wwn tiqn_wwn;
+ struct iscsi_wwn_stat_grps tiqn_stat_grps;
+ int tiqn_index;
+ struct iscsi_sess_err_stats sess_err_stats;
+ struct iscsi_login_stats login_stats;
+ struct iscsi_logout_stats logout_stats;
+} ____cacheline_aligned;
+
+#define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
+
+struct iscsit_global {
+ /* In core shutdown */
+ u32 in_shutdown;
+ u32 active_ts;
+ /* Unique identifier used for the authentication daemon */
+ u32 auth_id;
+ u32 inactive_ts;
+ /* Thread Set bitmap count */
+ int ts_bitmap_count;
+ /* Thread Set bitmap pointer */
+ unsigned long *ts_bitmap;
+ /* Used for iSCSI discovery session authentication */
+ struct iscsi_node_acl discovery_acl;
+ struct iscsi_portal_group *discovery_tpg;
+};
+
+#endif /* ISCSI_TARGET_CORE_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.c
new file mode 100644
index 0000000..8c04951
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.c
@@ -0,0 +1,531 @@
+/*******************************************************************************
+ * This file contains the iSCSI Target DataIN value generation functions.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <scsi/iscsi_proto.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_datain_values.h"
+
+struct iscsi_datain_req *iscsit_allocate_datain_req(void)
+{
+ struct iscsi_datain_req *dr;
+
+ dr = kmem_cache_zalloc(lio_dr_cache, GFP_ATOMIC);
+ if (!dr) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_datain_req\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&dr->dr_list);
+
+ return dr;
+}
+
+void iscsit_attach_datain_req(struct iscsi_cmd *cmd, struct iscsi_datain_req *dr)
+{
+ spin_lock(&cmd->datain_lock);
+ list_add_tail(&dr->dr_list, &cmd->datain_list);
+ spin_unlock(&cmd->datain_lock);
+}
+
+void iscsit_free_datain_req(struct iscsi_cmd *cmd, struct iscsi_datain_req *dr)
+{
+ spin_lock(&cmd->datain_lock);
+ list_del(&dr->dr_list);
+ spin_unlock(&cmd->datain_lock);
+
+ kmem_cache_free(lio_dr_cache, dr);
+}
+
+void iscsit_free_all_datain_reqs(struct iscsi_cmd *cmd)
+{
+ struct iscsi_datain_req *dr, *dr_tmp;
+
+ spin_lock(&cmd->datain_lock);
+ list_for_each_entry_safe(dr, dr_tmp, &cmd->datain_list, dr_list) {
+ list_del(&dr->dr_list);
+ kmem_cache_free(lio_dr_cache, dr);
+ }
+ spin_unlock(&cmd->datain_lock);
+}
+
+struct iscsi_datain_req *iscsit_get_datain_req(struct iscsi_cmd *cmd)
+{
+ struct iscsi_datain_req *dr;
+
+ if (list_empty(&cmd->datain_list)) {
+ pr_err("cmd->datain_list is empty for ITT:"
+ " 0x%08x\n", cmd->init_task_tag);
+ return NULL;
+ }
+ list_for_each_entry(dr, &cmd->datain_list, dr_list)
+ break;
+
+ return dr;
+}
+
+/*
+ * For Normal and Recovery DataSequenceInOrder=Yes and DataPDUInOrder=Yes.
+ */
+static struct iscsi_datain_req *iscsit_set_datain_values_yes_and_yes(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain *datain)
+{
+ u32 next_burst_len, read_data_done, read_data_left;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+
+ dr = iscsit_get_datain_req(cmd);
+ if (!dr)
+ return NULL;
+
+ if (dr->recovery && dr->generate_recovery_values) {
+ if (iscsit_create_recovery_datain_values_datasequenceinorder_yes(
+ cmd, dr) < 0)
+ return NULL;
+
+ dr->generate_recovery_values = 0;
+ }
+
+ next_burst_len = (!dr->recovery) ?
+ cmd->next_burst_len : dr->next_burst_len;
+ read_data_done = (!dr->recovery) ?
+ cmd->read_data_done : dr->read_data_done;
+
+ read_data_left = (cmd->data_length - read_data_done);
+ if (!read_data_left) {
+ pr_err("ITT: 0x%08x read_data_left is zero!\n",
+ cmd->init_task_tag);
+ return NULL;
+ }
+
+ if ((read_data_left <= conn->conn_ops->MaxRecvDataSegmentLength) &&
+ (read_data_left <= (conn->sess->sess_ops->MaxBurstLength -
+ next_burst_len))) {
+ datain->length = read_data_left;
+
+ datain->flags |= (ISCSI_FLAG_CMD_FINAL | ISCSI_FLAG_DATA_STATUS);
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ datain->flags |= ISCSI_FLAG_DATA_ACK;
+ } else {
+ if ((next_burst_len +
+ conn->conn_ops->MaxRecvDataSegmentLength) <
+ conn->sess->sess_ops->MaxBurstLength) {
+ datain->length =
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ next_burst_len += datain->length;
+ } else {
+ datain->length = (conn->sess->sess_ops->MaxBurstLength -
+ next_burst_len);
+ next_burst_len = 0;
+
+ datain->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ datain->flags |= ISCSI_FLAG_DATA_ACK;
+ }
+ }
+
+ datain->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
+ datain->offset = read_data_done;
+
+ if (!dr->recovery) {
+ cmd->next_burst_len = next_burst_len;
+ cmd->read_data_done += datain->length;
+ } else {
+ dr->next_burst_len = next_burst_len;
+ dr->read_data_done += datain->length;
+ }
+
+ if (!dr->recovery) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS)
+ dr->dr_complete = DATAIN_COMPLETE_NORMAL;
+
+ return dr;
+ }
+
+ if (!dr->runlength) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ } else {
+ if ((dr->begrun + dr->runlength) == dr->data_sn) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ }
+
+ return dr;
+}
+
+/*
+ * For Normal and Recovery DataSequenceInOrder=No and DataPDUInOrder=Yes.
+ */
+static struct iscsi_datain_req *iscsit_set_datain_values_no_and_yes(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain *datain)
+{
+ u32 offset, read_data_done, read_data_left, seq_send_order;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+ struct iscsi_seq *seq;
+
+ dr = iscsit_get_datain_req(cmd);
+ if (!dr)
+ return NULL;
+
+ if (dr->recovery && dr->generate_recovery_values) {
+ if (iscsit_create_recovery_datain_values_datasequenceinorder_no(
+ cmd, dr) < 0)
+ return NULL;
+
+ dr->generate_recovery_values = 0;
+ }
+
+ read_data_done = (!dr->recovery) ?
+ cmd->read_data_done : dr->read_data_done;
+ seq_send_order = (!dr->recovery) ?
+ cmd->seq_send_order : dr->seq_send_order;
+
+ read_data_left = (cmd->data_length - read_data_done);
+ if (!read_data_left) {
+ pr_err("ITT: 0x%08x read_data_left is zero!\n",
+ cmd->init_task_tag);
+ return NULL;
+ }
+
+ seq = iscsit_get_seq_holder_for_datain(cmd, seq_send_order);
+ if (!seq)
+ return NULL;
+
+ seq->sent = 1;
+
+ if (!dr->recovery && !seq->next_burst_len)
+ seq->first_datasn = cmd->data_sn;
+
+ offset = (seq->offset + seq->next_burst_len);
+
+ if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ cmd->data_length) {
+ datain->length = (cmd->data_length - offset);
+ datain->offset = offset;
+
+ datain->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ datain->flags |= ISCSI_FLAG_DATA_ACK;
+
+ seq->next_burst_len = 0;
+ seq_send_order++;
+ } else {
+ if ((seq->next_burst_len +
+ conn->conn_ops->MaxRecvDataSegmentLength) <
+ conn->sess->sess_ops->MaxBurstLength) {
+ datain->length =
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ datain->offset = (seq->offset + seq->next_burst_len);
+
+ seq->next_burst_len += datain->length;
+ } else {
+ datain->length = (conn->sess->sess_ops->MaxBurstLength -
+ seq->next_burst_len);
+ datain->offset = (seq->offset + seq->next_burst_len);
+
+ datain->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ datain->flags |= ISCSI_FLAG_DATA_ACK;
+
+ seq->next_burst_len = 0;
+ seq_send_order++;
+ }
+ }
+
+ if ((read_data_done + datain->length) == cmd->data_length)
+ datain->flags |= ISCSI_FLAG_DATA_STATUS;
+
+ datain->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
+ if (!dr->recovery) {
+ cmd->seq_send_order = seq_send_order;
+ cmd->read_data_done += datain->length;
+ } else {
+ dr->seq_send_order = seq_send_order;
+ dr->read_data_done += datain->length;
+ }
+
+ if (!dr->recovery) {
+ if (datain->flags & ISCSI_FLAG_CMD_FINAL)
+ seq->last_datasn = datain->data_sn;
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS)
+ dr->dr_complete = DATAIN_COMPLETE_NORMAL;
+
+ return dr;
+ }
+
+ if (!dr->runlength) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ } else {
+ if ((dr->begrun + dr->runlength) == dr->data_sn) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ }
+
+ return dr;
+}
+
+/*
+ * For Normal and Recovery DataSequenceInOrder=Yes and DataPDUInOrder=No.
+ */
+static struct iscsi_datain_req *iscsit_set_datain_values_yes_and_no(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain *datain)
+{
+ u32 next_burst_len, read_data_done, read_data_left;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+ struct iscsi_pdu *pdu;
+
+ dr = iscsit_get_datain_req(cmd);
+ if (!dr)
+ return NULL;
+
+ if (dr->recovery && dr->generate_recovery_values) {
+ if (iscsit_create_recovery_datain_values_datasequenceinorder_yes(
+ cmd, dr) < 0)
+ return NULL;
+
+ dr->generate_recovery_values = 0;
+ }
+
+ next_burst_len = (!dr->recovery) ?
+ cmd->next_burst_len : dr->next_burst_len;
+ read_data_done = (!dr->recovery) ?
+ cmd->read_data_done : dr->read_data_done;
+
+ read_data_left = (cmd->data_length - read_data_done);
+ if (!read_data_left) {
+ pr_err("ITT: 0x%08x read_data_left is zero!\n",
+ cmd->init_task_tag);
+ return dr;
+ }
+
+ pdu = iscsit_get_pdu_holder_for_seq(cmd, NULL);
+ if (!pdu)
+ return dr;
+
+ if ((read_data_done + pdu->length) == cmd->data_length) {
+ pdu->flags |= (ISCSI_FLAG_CMD_FINAL | ISCSI_FLAG_DATA_STATUS);
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ pdu->flags |= ISCSI_FLAG_DATA_ACK;
+
+ next_burst_len = 0;
+ } else {
+ if ((next_burst_len + conn->conn_ops->MaxRecvDataSegmentLength) <
+ conn->sess->sess_ops->MaxBurstLength)
+ next_burst_len += pdu->length;
+ else {
+ pdu->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ pdu->flags |= ISCSI_FLAG_DATA_ACK;
+
+ next_burst_len = 0;
+ }
+ }
+
+ pdu->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
+ if (!dr->recovery) {
+ cmd->next_burst_len = next_burst_len;
+ cmd->read_data_done += pdu->length;
+ } else {
+ dr->next_burst_len = next_burst_len;
+ dr->read_data_done += pdu->length;
+ }
+
+ datain->flags = pdu->flags;
+ datain->length = pdu->length;
+ datain->offset = pdu->offset;
+ datain->data_sn = pdu->data_sn;
+
+ if (!dr->recovery) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS)
+ dr->dr_complete = DATAIN_COMPLETE_NORMAL;
+
+ return dr;
+ }
+
+ if (!dr->runlength) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ } else {
+ if ((dr->begrun + dr->runlength) == dr->data_sn) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ }
+
+ return dr;
+}
+
+/*
+ * For Normal and Recovery DataSequenceInOrder=No and DataPDUInOrder=No.
+ */
+static struct iscsi_datain_req *iscsit_set_datain_values_no_and_no(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain *datain)
+{
+ u32 read_data_done, read_data_left, seq_send_order;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+ struct iscsi_pdu *pdu;
+ struct iscsi_seq *seq = NULL;
+
+ dr = iscsit_get_datain_req(cmd);
+ if (!dr)
+ return NULL;
+
+ if (dr->recovery && dr->generate_recovery_values) {
+ if (iscsit_create_recovery_datain_values_datasequenceinorder_no(
+ cmd, dr) < 0)
+ return NULL;
+
+ dr->generate_recovery_values = 0;
+ }
+
+ read_data_done = (!dr->recovery) ?
+ cmd->read_data_done : dr->read_data_done;
+ seq_send_order = (!dr->recovery) ?
+ cmd->seq_send_order : dr->seq_send_order;
+
+ read_data_left = (cmd->data_length - read_data_done);
+ if (!read_data_left) {
+ pr_err("ITT: 0x%08x read_data_left is zero!\n",
+ cmd->init_task_tag);
+ return NULL;
+ }
+
+ seq = iscsit_get_seq_holder_for_datain(cmd, seq_send_order);
+ if (!seq)
+ return NULL;
+
+ seq->sent = 1;
+
+ if (!dr->recovery && !seq->next_burst_len)
+ seq->first_datasn = cmd->data_sn;
+
+ pdu = iscsit_get_pdu_holder_for_seq(cmd, seq);
+ if (!pdu)
+ return NULL;
+
+ if (seq->pdu_send_order == seq->pdu_count) {
+ pdu->flags |= ISCSI_FLAG_CMD_FINAL;
+ if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
+ pdu->flags |= ISCSI_FLAG_DATA_ACK;
+
+ seq->next_burst_len = 0;
+ seq_send_order++;
+ } else
+ seq->next_burst_len += pdu->length;
+
+ if ((read_data_done + pdu->length) == cmd->data_length)
+ pdu->flags |= ISCSI_FLAG_DATA_STATUS;
+
+ pdu->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
+ if (!dr->recovery) {
+ cmd->seq_send_order = seq_send_order;
+ cmd->read_data_done += pdu->length;
+ } else {
+ dr->seq_send_order = seq_send_order;
+ dr->read_data_done += pdu->length;
+ }
+
+ datain->flags = pdu->flags;
+ datain->length = pdu->length;
+ datain->offset = pdu->offset;
+ datain->data_sn = pdu->data_sn;
+
+ if (!dr->recovery) {
+ if (datain->flags & ISCSI_FLAG_CMD_FINAL)
+ seq->last_datasn = datain->data_sn;
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS)
+ dr->dr_complete = DATAIN_COMPLETE_NORMAL;
+
+ return dr;
+ }
+
+ if (!dr->runlength) {
+ if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ } else {
+ if ((dr->begrun + dr->runlength) == dr->data_sn) {
+ dr->dr_complete =
+ (dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
+ DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
+ DATAIN_COMPLETE_CONNECTION_RECOVERY;
+ }
+ }
+
+ return dr;
+}
+
+struct iscsi_datain_req *iscsit_get_datain_values(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain *datain)
+{
+ struct iscsi_conn *conn = cmd->conn;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder &&
+ conn->sess->sess_ops->DataPDUInOrder)
+ return iscsit_set_datain_values_yes_and_yes(cmd, datain);
+ else if (!conn->sess->sess_ops->DataSequenceInOrder &&
+ conn->sess->sess_ops->DataPDUInOrder)
+ return iscsit_set_datain_values_no_and_yes(cmd, datain);
+ else if (conn->sess->sess_ops->DataSequenceInOrder &&
+ !conn->sess->sess_ops->DataPDUInOrder)
+ return iscsit_set_datain_values_yes_and_no(cmd, datain);
+ else if (!conn->sess->sess_ops->DataSequenceInOrder &&
+ !conn->sess->sess_ops->DataPDUInOrder)
+ return iscsit_set_datain_values_no_and_no(cmd, datain);
+
+ return NULL;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.h
new file mode 100644
index 0000000..646429a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_datain_values.h
@@ -0,0 +1,12 @@
+#ifndef ISCSI_TARGET_DATAIN_VALUES_H
+#define ISCSI_TARGET_DATAIN_VALUES_H
+
+extern struct iscsi_datain_req *iscsit_allocate_datain_req(void);
+extern void iscsit_attach_datain_req(struct iscsi_cmd *, struct iscsi_datain_req *);
+extern void iscsit_free_datain_req(struct iscsi_cmd *, struct iscsi_datain_req *);
+extern void iscsit_free_all_datain_reqs(struct iscsi_cmd *);
+extern struct iscsi_datain_req *iscsit_get_datain_req(struct iscsi_cmd *);
+extern struct iscsi_datain_req *iscsit_get_datain_values(struct iscsi_cmd *,
+ struct iscsi_datain *);
+
+#endif /*** ISCSI_TARGET_DATAIN_VALUES_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.c
new file mode 100644
index 0000000..bcc4098
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.c
@@ -0,0 +1,67 @@
+/*******************************************************************************
+ * This file contains the iSCSI Virtual Device and Disk Transport
+ * agnostic related functions.
+ *
+ \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <scsi/scsi_device.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+
+void iscsit_determine_maxcmdsn(struct iscsi_session *sess)
+{
+ struct se_node_acl *se_nacl;
+
+ /*
+ * This is a discovery session, the single queue slot was already
+ * assigned in iscsi_login_zero_tsih(). Since only Logout and
+ * Text Opcodes are allowed during discovery we do not have to worry
+ * about the HBA's queue depth here.
+ */
+ if (sess->sess_ops->SessionType)
+ return;
+
+ se_nacl = sess->se_sess->se_node_acl;
+
+ /*
+ * This is a normal session, set the Session's CmdSN window to the
+ * struct se_node_acl->queue_depth. The value in struct se_node_acl->queue_depth
+ * has already been validated as a legal value in
+ * core_set_queue_depth_for_node().
+ */
+ sess->cmdsn_window = se_nacl->queue_depth;
+ sess->max_cmd_sn = (sess->max_cmd_sn + se_nacl->queue_depth) - 1;
+}
+
+void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess)
+{
+ if (cmd->immediate_cmd || cmd->maxcmdsn_inc)
+ return;
+
+ cmd->maxcmdsn_inc = 1;
+
+ mutex_lock(&sess->cmdsn_mutex);
+ sess->max_cmd_sn += 1;
+ pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
+ mutex_unlock(&sess->cmdsn_mutex);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.h
new file mode 100644
index 0000000..a0e2df9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_device.h
@@ -0,0 +1,7 @@
+#ifndef ISCSI_TARGET_DEVICE_H
+#define ISCSI_TARGET_DEVICE_H
+
+extern void iscsit_determine_maxcmdsn(struct iscsi_session *);
+extern void iscsit_increment_maxcmdsn(struct iscsi_cmd *, struct iscsi_session *);
+
+#endif /* ISCSI_TARGET_DEVICE_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.c
new file mode 100644
index 0000000..a7c4324
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.c
@@ -0,0 +1,1004 @@
+/******************************************************************************
+ * This file contains error recovery level zero functions used by
+ * the iSCSI Target driver.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_tq.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+
+/*
+ * Used to set values in struct iscsi_cmd that iscsit_dataout_check_sequence()
+ * checks against to determine a PDU's Offset+Length is within the current
+ * DataOUT Sequence. Used for DataSequenceInOrder=Yes only.
+ */
+void iscsit_set_dataout_sequence_values(
+ struct iscsi_cmd *cmd)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ /*
+ * Still set seq_start_offset and seq_end_offset for Unsolicited
+ * DataOUT, even if DataSequenceInOrder=No.
+ */
+ if (cmd->unsolicited_data) {
+ cmd->seq_start_offset = cmd->write_data_done;
+ cmd->seq_end_offset = (cmd->write_data_done +
+ (cmd->data_length >
+ conn->sess->sess_ops->FirstBurstLength) ?
+ conn->sess->sess_ops->FirstBurstLength : cmd->data_length);
+ return;
+ }
+
+ if (!conn->sess->sess_ops->DataSequenceInOrder)
+ return;
+
+ if (!cmd->seq_start_offset && !cmd->seq_end_offset) {
+ cmd->seq_start_offset = cmd->write_data_done;
+ cmd->seq_end_offset = (cmd->data_length >
+ conn->sess->sess_ops->MaxBurstLength) ?
+ (cmd->write_data_done +
+ conn->sess->sess_ops->MaxBurstLength) : cmd->data_length;
+ } else {
+ cmd->seq_start_offset = cmd->seq_end_offset;
+ cmd->seq_end_offset = ((cmd->seq_end_offset +
+ conn->sess->sess_ops->MaxBurstLength) >=
+ cmd->data_length) ? cmd->data_length :
+ (cmd->seq_end_offset +
+ conn->sess->sess_ops->MaxBurstLength);
+ }
+}
+
+static int iscsit_dataout_within_command_recovery_check(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ /*
+ * We do the within-command recovery checks here as it is
+ * the first function called in iscsi_check_pre_dataout().
+ * Basically, if we are in within-command recovery and
+ * the PDU does not contain the offset the sequence needs,
+ * dump the payload.
+ *
+ * This only applies to DataPDUInOrder=Yes, for
+ * DataPDUInOrder=No we only re-request the failed PDU
+ * and check that all PDUs in a sequence are received
+ * upon end of sequence.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if ((cmd->cmd_flags & ICF_WITHIN_COMMAND_RECOVERY) &&
+ (cmd->write_data_done != hdr->offset))
+ goto dump;
+
+ cmd->cmd_flags &= ~ICF_WITHIN_COMMAND_RECOVERY;
+ } else {
+ struct iscsi_seq *seq;
+
+ seq = iscsit_get_seq_holder(cmd, hdr->offset, payload_length);
+ if (!seq)
+ return DATAOUT_CANNOT_RECOVER;
+ /*
+ * Set the struct iscsi_seq pointer to reuse later.
+ */
+ cmd->seq_ptr = seq;
+
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ if ((seq->status ==
+ DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY) &&
+ ((seq->offset != hdr->offset) ||
+ (seq->data_sn != hdr->datasn)))
+ goto dump;
+ } else {
+ if ((seq->status ==
+ DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY) &&
+ (seq->data_sn != hdr->datasn))
+ goto dump;
+ }
+
+ if (seq->status == DATAOUT_SEQUENCE_COMPLETE)
+ goto dump;
+
+ if (seq->status != DATAOUT_SEQUENCE_COMPLETE)
+ seq->status = 0;
+ }
+
+ return DATAOUT_NORMAL;
+
+dump:
+ pr_err("Dumping DataOUT PDU Offset: %u Length: %d DataSN:"
+ " 0x%08x\n", hdr->offset, payload_length, hdr->datasn);
+ return iscsit_dump_data_payload(conn, payload_length, 1);
+}
+
+static int iscsit_dataout_check_unsolicited_sequence(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ u32 first_burst_len;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+
+ if ((hdr->offset < cmd->seq_start_offset) ||
+ ((hdr->offset + payload_length) > cmd->seq_end_offset)) {
+ pr_err("Command ITT: 0x%08x with Offset: %u,"
+ " Length: %u outside of Unsolicited Sequence %u:%u while"
+ " DataSequenceInOrder=Yes.\n", cmd->init_task_tag,
+ hdr->offset, payload_length, cmd->seq_start_offset,
+ cmd->seq_end_offset);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ first_burst_len = (cmd->first_burst_len + payload_length);
+
+ if (first_burst_len > conn->sess->sess_ops->FirstBurstLength) {
+ pr_err("Total %u bytes exceeds FirstBurstLength: %u"
+ " for this Unsolicited DataOut Burst.\n",
+ first_burst_len, conn->sess->sess_ops->FirstBurstLength);
+ transport_send_check_condition_and_sense(&cmd->se_cmd,
+ TCM_INCORRECT_AMOUNT_OF_DATA, 0);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ /*
+ * Perform various MaxBurstLength and ISCSI_FLAG_CMD_FINAL sanity
+ * checks for the current Unsolicited DataOUT Sequence.
+ */
+ if (hdr->flags & ISCSI_FLAG_CMD_FINAL) {
+ /*
+ * Ignore ISCSI_FLAG_CMD_FINAL checks while DataPDUInOrder=No, end of
+ * sequence checks are handled in
+ * iscsit_dataout_datapduinorder_no_fbit().
+ */
+ if (!conn->sess->sess_ops->DataPDUInOrder)
+ goto out;
+
+ if ((first_burst_len != cmd->data_length) &&
+ (first_burst_len != conn->sess->sess_ops->FirstBurstLength)) {
+ pr_err("Unsolicited non-immediate data"
+ " received %u does not equal FirstBurstLength: %u, and"
+ " does not equal ExpXferLen %u.\n", first_burst_len,
+ conn->sess->sess_ops->FirstBurstLength,
+ cmd->data_length);
+ transport_send_check_condition_and_sense(&cmd->se_cmd,
+ TCM_INCORRECT_AMOUNT_OF_DATA, 0);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ } else {
+ if (first_burst_len == conn->sess->sess_ops->FirstBurstLength) {
+ pr_err("Command ITT: 0x%08x reached"
+ " FirstBurstLength: %u, but ISCSI_FLAG_CMD_FINAL is not set. protocol"
+ " error.\n", cmd->init_task_tag,
+ conn->sess->sess_ops->FirstBurstLength);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ if (first_burst_len == cmd->data_length) {
+ pr_err("Command ITT: 0x%08x reached"
+ " ExpXferLen: %u, but ISCSI_FLAG_CMD_FINAL is not set. protocol"
+ " error.\n", cmd->init_task_tag, cmd->data_length);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ }
+
+out:
+ return DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_check_sequence(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ u32 next_burst_len;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_seq *seq = NULL;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ /*
+ * For DataSequenceInOrder=Yes: Check that the offset and offset+length
+ * is within range as defined by iscsi_set_dataout_sequence_values().
+ *
+ * For DataSequenceInOrder=No: Check that an struct iscsi_seq exists for
+ * offset+length tuple.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ /*
+ * Due to possibility of recovery DataOUT sent by the initiator
+ * fullfilling an Recovery R2T, it's best to just dump the
+ * payload here, instead of erroring out.
+ */
+ if ((hdr->offset < cmd->seq_start_offset) ||
+ ((hdr->offset + payload_length) > cmd->seq_end_offset)) {
+ pr_err("Command ITT: 0x%08x with Offset: %u,"
+ " Length: %u outside of Sequence %u:%u while"
+ " DataSequenceInOrder=Yes.\n", cmd->init_task_tag,
+ hdr->offset, payload_length, cmd->seq_start_offset,
+ cmd->seq_end_offset);
+
+ if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+ return DATAOUT_WITHIN_COMMAND_RECOVERY;
+ }
+
+ next_burst_len = (cmd->next_burst_len + payload_length);
+ } else {
+ seq = iscsit_get_seq_holder(cmd, hdr->offset, payload_length);
+ if (!seq)
+ return DATAOUT_CANNOT_RECOVER;
+ /*
+ * Set the struct iscsi_seq pointer to reuse later.
+ */
+ cmd->seq_ptr = seq;
+
+ if (seq->status == DATAOUT_SEQUENCE_COMPLETE) {
+ if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+ return DATAOUT_WITHIN_COMMAND_RECOVERY;
+ }
+
+ next_burst_len = (seq->next_burst_len + payload_length);
+ }
+
+ if (next_burst_len > conn->sess->sess_ops->MaxBurstLength) {
+ pr_err("Command ITT: 0x%08x, NextBurstLength: %u and"
+ " Length: %u exceeds MaxBurstLength: %u. protocol"
+ " error.\n", cmd->init_task_tag,
+ (next_burst_len - payload_length),
+ payload_length, conn->sess->sess_ops->MaxBurstLength);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ /*
+ * Perform various MaxBurstLength and ISCSI_FLAG_CMD_FINAL sanity
+ * checks for the current DataOUT Sequence.
+ */
+ if (hdr->flags & ISCSI_FLAG_CMD_FINAL) {
+ /*
+ * Ignore ISCSI_FLAG_CMD_FINAL checks while DataPDUInOrder=No, end of
+ * sequence checks are handled in
+ * iscsit_dataout_datapduinorder_no_fbit().
+ */
+ if (!conn->sess->sess_ops->DataPDUInOrder)
+ goto out;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if ((next_burst_len <
+ conn->sess->sess_ops->MaxBurstLength) &&
+ ((cmd->write_data_done + payload_length) <
+ cmd->data_length)) {
+ pr_err("Command ITT: 0x%08x set ISCSI_FLAG_CMD_FINAL"
+ " before end of DataOUT sequence, protocol"
+ " error.\n", cmd->init_task_tag);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ } else {
+ if (next_burst_len < seq->xfer_len) {
+ pr_err("Command ITT: 0x%08x set ISCSI_FLAG_CMD_FINAL"
+ " before end of DataOUT sequence, protocol"
+ " error.\n", cmd->init_task_tag);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ }
+ } else {
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if (next_burst_len ==
+ conn->sess->sess_ops->MaxBurstLength) {
+ pr_err("Command ITT: 0x%08x reached"
+ " MaxBurstLength: %u, but ISCSI_FLAG_CMD_FINAL is"
+ " not set, protocol error.", cmd->init_task_tag,
+ conn->sess->sess_ops->MaxBurstLength);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ if ((cmd->write_data_done + payload_length) ==
+ cmd->data_length) {
+ pr_err("Command ITT: 0x%08x reached"
+ " last DataOUT PDU in sequence but ISCSI_FLAG_"
+ "CMD_FINAL is not set, protocol error.\n",
+ cmd->init_task_tag);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ } else {
+ if (next_burst_len == seq->xfer_len) {
+ pr_err("Command ITT: 0x%08x reached"
+ " last DataOUT PDU in sequence but ISCSI_FLAG_"
+ "CMD_FINAL is not set, protocol error.\n",
+ cmd->init_task_tag);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+ }
+ }
+
+out:
+ return DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_check_datasn(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ int dump = 0, recovery = 0;
+ u32 data_sn = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ /*
+ * Considering the target has no method of re-requesting DataOUT
+ * by DataSN, if we receieve a greater DataSN than expected we
+ * assume the functions for DataPDUInOrder=[Yes,No] below will
+ * handle it.
+ *
+ * If the DataSN is less than expected, dump the payload.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder)
+ data_sn = cmd->data_sn;
+ else {
+ struct iscsi_seq *seq = cmd->seq_ptr;
+ data_sn = seq->data_sn;
+ }
+
+ if (hdr->datasn > data_sn) {
+ pr_err("Command ITT: 0x%08x, received DataSN: 0x%08x"
+ " higher than expected 0x%08x.\n", cmd->init_task_tag,
+ hdr->datasn, data_sn);
+ recovery = 1;
+ goto recover;
+ } else if (hdr->datasn < data_sn) {
+ pr_err("Command ITT: 0x%08x, received DataSN: 0x%08x"
+ " lower than expected 0x%08x, discarding payload.\n",
+ cmd->init_task_tag, hdr->datasn, data_sn);
+ dump = 1;
+ goto dump;
+ }
+
+ return DATAOUT_NORMAL;
+
+recover:
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to perform within-command recovery"
+ " while ERL=0.\n");
+ return DATAOUT_CANNOT_RECOVER;
+ }
+dump:
+ if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+
+ return (recovery || dump) ? DATAOUT_WITHIN_COMMAND_RECOVERY :
+ DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_pre_datapduinorder_yes(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ int dump = 0, recovery = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ /*
+ * For DataSequenceInOrder=Yes: If the offset is greater than the global
+ * DataPDUInOrder=Yes offset counter in struct iscsi_cmd a protcol error has
+ * occured and fail the connection.
+ *
+ * For DataSequenceInOrder=No: If the offset is greater than the per
+ * sequence DataPDUInOrder=Yes offset counter in struct iscsi_seq a protocol
+ * error has occured and fail the connection.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if (hdr->offset != cmd->write_data_done) {
+ pr_err("Command ITT: 0x%08x, received offset"
+ " %u different than expected %u.\n", cmd->init_task_tag,
+ hdr->offset, cmd->write_data_done);
+ recovery = 1;
+ goto recover;
+ }
+ } else {
+ struct iscsi_seq *seq = cmd->seq_ptr;
+
+ if (hdr->offset > seq->offset) {
+ pr_err("Command ITT: 0x%08x, received offset"
+ " %u greater than expected %u.\n", cmd->init_task_tag,
+ hdr->offset, seq->offset);
+ recovery = 1;
+ goto recover;
+ } else if (hdr->offset < seq->offset) {
+ pr_err("Command ITT: 0x%08x, received offset"
+ " %u less than expected %u, discarding payload.\n",
+ cmd->init_task_tag, hdr->offset, seq->offset);
+ dump = 1;
+ goto dump;
+ }
+ }
+
+ return DATAOUT_NORMAL;
+
+recover:
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to perform within-command recovery"
+ " while ERL=0.\n");
+ return DATAOUT_CANNOT_RECOVER;
+ }
+dump:
+ if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+
+ return (recovery) ? iscsit_recover_dataout_sequence(cmd,
+ hdr->offset, payload_length) :
+ (dump) ? DATAOUT_WITHIN_COMMAND_RECOVERY : DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_pre_datapduinorder_no(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_pdu *pdu;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ pdu = iscsit_get_pdu_holder(cmd, hdr->offset, payload_length);
+ if (!pdu)
+ return DATAOUT_CANNOT_RECOVER;
+
+ cmd->pdu_ptr = pdu;
+
+ switch (pdu->status) {
+ case ISCSI_PDU_NOT_RECEIVED:
+ case ISCSI_PDU_CRC_FAILED:
+ case ISCSI_PDU_TIMED_OUT:
+ break;
+ case ISCSI_PDU_RECEIVED_OK:
+ pr_err("Command ITT: 0x%08x received already gotten"
+ " Offset: %u, Length: %u\n", cmd->init_task_tag,
+ hdr->offset, payload_length);
+ return iscsit_dump_data_payload(cmd->conn, payload_length, 1);
+ default:
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ return DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_update_r2t(struct iscsi_cmd *cmd, u32 offset, u32 length)
+{
+ struct iscsi_r2t *r2t;
+
+ if (cmd->unsolicited_data)
+ return 0;
+
+ r2t = iscsit_get_r2t_for_eos(cmd, offset, length);
+ if (!r2t)
+ return -1;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ r2t->seq_complete = 1;
+ cmd->outstanding_r2ts--;
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return 0;
+}
+
+static int iscsit_dataout_update_datapduinorder_no(
+ struct iscsi_cmd *cmd,
+ u32 data_sn,
+ int f_bit)
+{
+ int ret = 0;
+ struct iscsi_pdu *pdu = cmd->pdu_ptr;
+
+ pdu->data_sn = data_sn;
+
+ switch (pdu->status) {
+ case ISCSI_PDU_NOT_RECEIVED:
+ pdu->status = ISCSI_PDU_RECEIVED_OK;
+ break;
+ case ISCSI_PDU_CRC_FAILED:
+ pdu->status = ISCSI_PDU_RECEIVED_OK;
+ break;
+ case ISCSI_PDU_TIMED_OUT:
+ pdu->status = ISCSI_PDU_RECEIVED_OK;
+ break;
+ default:
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ if (f_bit) {
+ ret = iscsit_dataout_datapduinorder_no_fbit(cmd, pdu);
+ if (ret == DATAOUT_CANNOT_RECOVER)
+ return ret;
+ }
+
+ return DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_post_crc_passed(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ int ret, send_r2t = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_seq *seq = NULL;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ if (cmd->unsolicited_data) {
+ if ((cmd->first_burst_len + payload_length) ==
+ conn->sess->sess_ops->FirstBurstLength) {
+ if (iscsit_dataout_update_r2t(cmd, hdr->offset,
+ payload_length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+ send_r2t = 1;
+ }
+
+ if (!conn->sess->sess_ops->DataPDUInOrder) {
+ ret = iscsit_dataout_update_datapduinorder_no(cmd,
+ hdr->datasn, (hdr->flags & ISCSI_FLAG_CMD_FINAL));
+ if (ret == DATAOUT_CANNOT_RECOVER)
+ return ret;
+ }
+
+ cmd->first_burst_len += payload_length;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder)
+ cmd->data_sn++;
+ else {
+ seq = cmd->seq_ptr;
+ seq->data_sn++;
+ seq->offset += payload_length;
+ }
+
+ if (send_r2t) {
+ if (seq)
+ seq->status = DATAOUT_SEQUENCE_COMPLETE;
+ cmd->first_burst_len = 0;
+ cmd->unsolicited_data = 0;
+ }
+ } else {
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if ((cmd->next_burst_len + payload_length) ==
+ conn->sess->sess_ops->MaxBurstLength) {
+ if (iscsit_dataout_update_r2t(cmd, hdr->offset,
+ payload_length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+ send_r2t = 1;
+ }
+
+ if (!conn->sess->sess_ops->DataPDUInOrder) {
+ ret = iscsit_dataout_update_datapduinorder_no(
+ cmd, hdr->datasn,
+ (hdr->flags & ISCSI_FLAG_CMD_FINAL));
+ if (ret == DATAOUT_CANNOT_RECOVER)
+ return ret;
+ }
+
+ cmd->next_burst_len += payload_length;
+ cmd->data_sn++;
+
+ if (send_r2t)
+ cmd->next_burst_len = 0;
+ } else {
+ seq = cmd->seq_ptr;
+
+ if ((seq->next_burst_len + payload_length) ==
+ seq->xfer_len) {
+ if (iscsit_dataout_update_r2t(cmd, hdr->offset,
+ payload_length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+ send_r2t = 1;
+ }
+
+ if (!conn->sess->sess_ops->DataPDUInOrder) {
+ ret = iscsit_dataout_update_datapduinorder_no(
+ cmd, hdr->datasn,
+ (hdr->flags & ISCSI_FLAG_CMD_FINAL));
+ if (ret == DATAOUT_CANNOT_RECOVER)
+ return ret;
+ }
+
+ seq->data_sn++;
+ seq->offset += payload_length;
+ seq->next_burst_len += payload_length;
+
+ if (send_r2t) {
+ seq->next_burst_len = 0;
+ seq->status = DATAOUT_SEQUENCE_COMPLETE;
+ }
+ }
+ }
+
+ if (send_r2t && conn->sess->sess_ops->DataSequenceInOrder)
+ cmd->data_sn = 0;
+
+ cmd->write_data_done += payload_length;
+
+ return (cmd->write_data_done == cmd->data_length) ?
+ DATAOUT_SEND_TO_TRANSPORT : (send_r2t) ?
+ DATAOUT_SEND_R2T : DATAOUT_NORMAL;
+}
+
+static int iscsit_dataout_post_crc_failed(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *pdu;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ if (conn->sess->sess_ops->DataPDUInOrder)
+ goto recover;
+ /*
+ * The rest of this function is only called when DataPDUInOrder=No.
+ */
+ pdu = cmd->pdu_ptr;
+
+ switch (pdu->status) {
+ case ISCSI_PDU_NOT_RECEIVED:
+ pdu->status = ISCSI_PDU_CRC_FAILED;
+ break;
+ case ISCSI_PDU_CRC_FAILED:
+ break;
+ case ISCSI_PDU_TIMED_OUT:
+ pdu->status = ISCSI_PDU_CRC_FAILED;
+ break;
+ default:
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+recover:
+ return iscsit_recover_dataout_sequence(cmd, hdr->offset, payload_length);
+}
+
+/*
+ * Called from iscsit_handle_data_out() before DataOUT Payload is received
+ * and CRC computed.
+ */
+extern int iscsit_check_pre_dataout(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ int ret;
+ struct iscsi_conn *conn = cmd->conn;
+
+ ret = iscsit_dataout_within_command_recovery_check(cmd, buf);
+ if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) ||
+ (ret == DATAOUT_CANNOT_RECOVER))
+ return ret;
+
+ ret = iscsit_dataout_check_datasn(cmd, buf);
+ if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) ||
+ (ret == DATAOUT_CANNOT_RECOVER))
+ return ret;
+
+ if (cmd->unsolicited_data) {
+ ret = iscsit_dataout_check_unsolicited_sequence(cmd, buf);
+ if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) ||
+ (ret == DATAOUT_CANNOT_RECOVER))
+ return ret;
+ } else {
+ ret = iscsit_dataout_check_sequence(cmd, buf);
+ if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) ||
+ (ret == DATAOUT_CANNOT_RECOVER))
+ return ret;
+ }
+
+ return (conn->sess->sess_ops->DataPDUInOrder) ?
+ iscsit_dataout_pre_datapduinorder_yes(cmd, buf) :
+ iscsit_dataout_pre_datapduinorder_no(cmd, buf);
+}
+
+/*
+ * Called from iscsit_handle_data_out() after DataOUT Payload is received
+ * and CRC computed.
+ */
+int iscsit_check_post_dataout(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf,
+ u8 data_crc_failed)
+{
+ struct iscsi_conn *conn = cmd->conn;
+
+ cmd->dataout_timeout_retries = 0;
+
+ if (!data_crc_failed)
+ return iscsit_dataout_post_crc_passed(cmd, buf);
+ else {
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Unable to recover from DataOUT CRC"
+ " failure while ERL=0, closing session.\n");
+ iscsit_add_reject_from_cmd(ISCSI_REASON_DATA_DIGEST_ERROR,
+ 1, 0, buf, cmd);
+ return DATAOUT_CANNOT_RECOVER;
+ }
+
+ iscsit_add_reject_from_cmd(ISCSI_REASON_DATA_DIGEST_ERROR,
+ 0, 0, buf, cmd);
+ return iscsit_dataout_post_crc_failed(cmd, buf);
+ }
+}
+
+static void iscsit_handle_time2retain_timeout(unsigned long data)
+{
+ struct iscsi_session *sess = (struct iscsi_session *) data;
+ struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+
+ spin_lock_bh(&se_tpg->session_lock);
+ if (sess->time2retain_timer_flags & ISCSI_TF_STOP) {
+ spin_unlock_bh(&se_tpg->session_lock);
+ return;
+ }
+ if (atomic_read(&sess->session_reinstatement)) {
+ pr_err("Exiting Time2Retain handler because"
+ " session_reinstatement=1\n");
+ spin_unlock_bh(&se_tpg->session_lock);
+ return;
+ }
+ sess->time2retain_timer_flags |= ISCSI_TF_EXPIRED;
+
+ pr_err("Time2Retain timer expired for SID: %u, cleaning up"
+ " iSCSI session.\n", sess->sid);
+ {
+ struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
+
+ if (tiqn) {
+ spin_lock(&tiqn->sess_err_stats.lock);
+ strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
+ (void *)sess->sess_ops->InitiatorName);
+ tiqn->sess_err_stats.last_sess_failure_type =
+ ISCSI_SESS_ERR_CXN_TIMEOUT;
+ tiqn->sess_err_stats.cxn_timeout_errors++;
+ sess->conn_timeout_errors++;
+ spin_unlock(&tiqn->sess_err_stats.lock);
+ }
+ }
+
+ spin_unlock_bh(&se_tpg->session_lock);
+ target_put_session(sess->se_sess);
+}
+
+extern void iscsit_start_time2retain_handler(struct iscsi_session *sess)
+{
+ int tpg_active;
+ /*
+ * Only start Time2Retain timer when the assoicated TPG is still in
+ * an ACTIVE (eg: not disabled or shutdown) state.
+ */
+ spin_lock(&ISCSI_TPG_S(sess)->tpg_state_lock);
+ tpg_active = (ISCSI_TPG_S(sess)->tpg_state == TPG_STATE_ACTIVE);
+ spin_unlock(&ISCSI_TPG_S(sess)->tpg_state_lock);
+
+ if (!tpg_active)
+ return;
+
+ if (sess->time2retain_timer_flags & ISCSI_TF_RUNNING)
+ return;
+
+ pr_debug("Starting Time2Retain timer for %u seconds on"
+ " SID: %u\n", sess->sess_ops->DefaultTime2Retain, sess->sid);
+
+ init_timer(&sess->time2retain_timer);
+ sess->time2retain_timer.expires =
+ (get_jiffies_64() + sess->sess_ops->DefaultTime2Retain * HZ);
+ sess->time2retain_timer.data = (unsigned long)sess;
+ sess->time2retain_timer.function = iscsit_handle_time2retain_timeout;
+ sess->time2retain_timer_flags &= ~ISCSI_TF_STOP;
+ sess->time2retain_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&sess->time2retain_timer);
+}
+
+/*
+ * Called with spin_lock_bh(&struct se_portal_group->session_lock) held
+ */
+extern int iscsit_stop_time2retain_timer(struct iscsi_session *sess)
+{
+ struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+
+ if (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)
+ return -1;
+
+ if (!(sess->time2retain_timer_flags & ISCSI_TF_RUNNING))
+ return 0;
+
+ sess->time2retain_timer_flags |= ISCSI_TF_STOP;
+ spin_unlock(&se_tpg->session_lock);
+
+ del_timer_sync(&sess->time2retain_timer);
+
+ spin_lock(&se_tpg->session_lock);
+ sess->time2retain_timer_flags &= ~ISCSI_TF_RUNNING;
+ pr_debug("Stopped Time2Retain Timer for SID: %u\n",
+ sess->sid);
+ return 0;
+}
+
+void iscsit_connection_reinstatement_rcfr(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->state_lock);
+ if (atomic_read(&conn->connection_exit)) {
+ spin_unlock_bh(&conn->state_lock);
+ goto sleep;
+ }
+
+ if (atomic_read(&conn->transport_failed)) {
+ spin_unlock_bh(&conn->state_lock);
+ goto sleep;
+ }
+ spin_unlock_bh(&conn->state_lock);
+
+ iscsi_thread_set_force_reinstatement(conn);
+
+sleep:
+ wait_for_completion(&conn->conn_wait_rcfr_comp);
+ complete(&conn->conn_post_wait_comp);
+}
+
+void iscsit_cause_connection_reinstatement(struct iscsi_conn *conn, int sleep)
+{
+ spin_lock_bh(&conn->state_lock);
+ if (atomic_read(&conn->connection_exit)) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ if (atomic_read(&conn->transport_failed)) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ if (atomic_read(&conn->connection_reinstatement)) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ if (iscsi_thread_set_force_reinstatement(conn) < 0) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ atomic_set(&conn->connection_reinstatement, 1);
+ if (!sleep) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ atomic_set(&conn->sleep_on_conn_wait_comp, 1);
+ spin_unlock_bh(&conn->state_lock);
+
+ wait_for_completion(&conn->conn_wait_comp);
+ complete(&conn->conn_post_wait_comp);
+}
+
+void iscsit_fall_back_to_erl0(struct iscsi_session *sess)
+{
+ pr_debug("Falling back to ErrorRecoveryLevel=0 for SID:"
+ " %u\n", sess->sid);
+
+ atomic_set(&sess->session_fall_back_to_erl0, 1);
+}
+
+static void iscsit_handle_connection_cleanup(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+
+ if ((sess->sess_ops->ErrorRecoveryLevel == 2) &&
+ !atomic_read(&sess->session_reinstatement) &&
+ !atomic_read(&sess->session_fall_back_to_erl0))
+ iscsit_connection_recovery_transport_reset(conn);
+ else {
+ pr_debug("Performing cleanup for failed iSCSI"
+ " Connection ID: %hu from %s\n", conn->cid,
+ sess->sess_ops->InitiatorName);
+ iscsit_close_connection(conn);
+ }
+}
+
+extern void iscsit_take_action_for_connection_exit(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->state_lock);
+ if (atomic_read(&conn->connection_exit)) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+ atomic_set(&conn->connection_exit, 1);
+
+ if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) {
+ spin_unlock_bh(&conn->state_lock);
+ iscsit_close_connection(conn);
+ return;
+ }
+
+ if (conn->conn_state == TARG_CONN_STATE_CLEANUP_WAIT) {
+ spin_unlock_bh(&conn->state_lock);
+ return;
+ }
+
+ pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
+ conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT;
+ spin_unlock_bh(&conn->state_lock);
+
+ iscsit_handle_connection_cleanup(conn);
+}
+
+/*
+ * This is the simple function that makes the magic of
+ * sync and steering happen in the follow paradoxical order:
+ *
+ * 0) Receive conn->of_marker (bytes left until next OFMarker)
+ * bytes into an offload buffer. When we pass the exact number
+ * of bytes in conn->of_marker, iscsit_dump_data_payload() and hence
+ * rx_data() will automatically receive the identical u32 marker
+ * values and store it in conn->of_marker_offset;
+ * 1) Now conn->of_marker_offset will contain the offset to the start
+ * of the next iSCSI PDU. Dump these remaining bytes into another
+ * offload buffer.
+ * 2) We are done!
+ * Next byte in the TCP stream will contain the next iSCSI PDU!
+ * Cool Huh?!
+ */
+int iscsit_recover_from_unknown_opcode(struct iscsi_conn *conn)
+{
+ /*
+ * Make sure the remaining bytes to next maker is a sane value.
+ */
+ if (conn->of_marker > (conn->conn_ops->OFMarkInt * 4)) {
+ pr_err("Remaining bytes to OFMarker: %u exceeds"
+ " OFMarkInt bytes: %u.\n", conn->of_marker,
+ conn->conn_ops->OFMarkInt * 4);
+ return -1;
+ }
+
+ pr_debug("Advancing %u bytes in TCP stream to get to the"
+ " next OFMarker.\n", conn->of_marker);
+
+ if (iscsit_dump_data_payload(conn, conn->of_marker, 0) < 0)
+ return -1;
+
+ /*
+ * Make sure the offset marker we retrived is a valid value.
+ */
+ if (conn->of_marker_offset > (ISCSI_HDR_LEN + (ISCSI_CRC_LEN * 2) +
+ conn->conn_ops->MaxRecvDataSegmentLength)) {
+ pr_err("OfMarker offset value: %u exceeds limit.\n",
+ conn->of_marker_offset);
+ return -1;
+ }
+
+ pr_debug("Discarding %u bytes of TCP stream to get to the"
+ " next iSCSI Opcode.\n", conn->of_marker_offset);
+
+ if (iscsit_dump_data_payload(conn, conn->of_marker_offset, 0) < 0)
+ return -1;
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.h
new file mode 100644
index 0000000..21acc9a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl0.h
@@ -0,0 +1,15 @@
+#ifndef ISCSI_TARGET_ERL0_H
+#define ISCSI_TARGET_ERL0_H
+
+extern void iscsit_set_dataout_sequence_values(struct iscsi_cmd *);
+extern int iscsit_check_pre_dataout(struct iscsi_cmd *, unsigned char *);
+extern int iscsit_check_post_dataout(struct iscsi_cmd *, unsigned char *, u8);
+extern void iscsit_start_time2retain_handler(struct iscsi_session *);
+extern int iscsit_stop_time2retain_timer(struct iscsi_session *);
+extern void iscsit_connection_reinstatement_rcfr(struct iscsi_conn *);
+extern void iscsit_cause_connection_reinstatement(struct iscsi_conn *, int);
+extern void iscsit_fall_back_to_erl0(struct iscsi_session *);
+extern void iscsit_take_action_for_connection_exit(struct iscsi_conn *);
+extern int iscsit_recover_from_unknown_opcode(struct iscsi_conn *);
+
+#endif /*** ISCSI_TARGET_ERL0_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.c
new file mode 100644
index 0000000..fd669b5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.c
@@ -0,0 +1,1299 @@
+/*******************************************************************************
+ * This file contains error recovery level one used by the iSCSI Target driver.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/list.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_datain_values.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target.h"
+
+#define OFFLOAD_BUF_SIZE 32768
+
+/*
+ * Used to dump excess datain payload for certain error recovery
+ * situations. Receive in OFFLOAD_BUF_SIZE max of datain per rx_data().
+ *
+ * dump_padding_digest denotes if padding and data digests need
+ * to be dumped.
+ */
+int iscsit_dump_data_payload(
+ struct iscsi_conn *conn,
+ u32 buf_len,
+ int dump_padding_digest)
+{
+ char *buf, pad_bytes[4];
+ int ret = DATAOUT_WITHIN_COMMAND_RECOVERY, rx_got;
+ u32 length, padding, offset = 0, size;
+ struct kvec iov;
+
+ length = (buf_len > OFFLOAD_BUF_SIZE) ? OFFLOAD_BUF_SIZE : buf_len;
+
+ buf = kzalloc(length, GFP_ATOMIC);
+ if (!buf) {
+ pr_err("Unable to allocate %u bytes for offload"
+ " buffer.\n", length);
+ return -1;
+ }
+ memset(&iov, 0, sizeof(struct kvec));
+
+ while (offset < buf_len) {
+ size = ((offset + length) > buf_len) ?
+ (buf_len - offset) : length;
+
+ iov.iov_len = size;
+ iov.iov_base = buf;
+
+ rx_got = rx_data(conn, &iov, 1, size);
+ if (rx_got != size) {
+ ret = DATAOUT_CANNOT_RECOVER;
+ goto out;
+ }
+
+ offset += size;
+ }
+
+ if (!dump_padding_digest)
+ goto out;
+
+ padding = ((-buf_len) & 3);
+ if (padding != 0) {
+ iov.iov_len = padding;
+ iov.iov_base = pad_bytes;
+
+ rx_got = rx_data(conn, &iov, 1, padding);
+ if (rx_got != padding) {
+ ret = DATAOUT_CANNOT_RECOVER;
+ goto out;
+ }
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ u32 data_crc;
+
+ iov.iov_len = ISCSI_CRC_LEN;
+ iov.iov_base = &data_crc;
+
+ rx_got = rx_data(conn, &iov, 1, ISCSI_CRC_LEN);
+ if (rx_got != ISCSI_CRC_LEN) {
+ ret = DATAOUT_CANNOT_RECOVER;
+ goto out;
+ }
+ }
+
+out:
+ kfree(buf);
+ return ret;
+}
+
+/*
+ * Used for retransmitting R2Ts from a R2T SNACK request.
+ */
+static int iscsit_send_recovery_r2t_for_snack(
+ struct iscsi_cmd *cmd,
+ struct iscsi_r2t *r2t)
+{
+ /*
+ * If the struct iscsi_r2t has not been sent yet, we can safely
+ * ignore retransmission
+ * of the R2TSN in question.
+ */
+ spin_lock_bh(&cmd->r2t_lock);
+ if (!r2t->sent_r2t) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return 0;
+ }
+ r2t->sent_r2t = 0;
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T);
+
+ return 0;
+}
+
+static int iscsit_handle_r2t_snack(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf,
+ u32 begrun,
+ u32 runlength)
+{
+ u32 last_r2tsn;
+ struct iscsi_r2t *r2t;
+
+ /*
+ * Make sure the initiator is not requesting retransmission
+ * of R2TSNs already acknowledged by a TMR TASK_REASSIGN.
+ */
+ if ((cmd->cmd_flags & ICF_GOT_DATACK_SNACK) &&
+ (begrun <= cmd->acked_data_sn)) {
+ pr_err("ITT: 0x%08x, R2T SNACK requesting"
+ " retransmission of R2TSN: 0x%08x to 0x%08x but already"
+ " acked to R2TSN: 0x%08x by TMR TASK_REASSIGN,"
+ " protocol error.\n", cmd->init_task_tag, begrun,
+ (begrun + runlength), cmd->acked_data_sn);
+
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+
+ if (runlength) {
+ if ((begrun + runlength) > cmd->r2t_sn) {
+ pr_err("Command ITT: 0x%08x received R2T SNACK"
+ " with BegRun: 0x%08x, RunLength: 0x%08x, exceeds"
+ " current R2TSN: 0x%08x, protocol error.\n",
+ cmd->init_task_tag, begrun, runlength, cmd->r2t_sn);
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_INVALID, 1, 0, buf, cmd);
+ }
+ last_r2tsn = (begrun + runlength);
+ } else
+ last_r2tsn = cmd->r2t_sn;
+
+ while (begrun < last_r2tsn) {
+ r2t = iscsit_get_holder_for_r2tsn(cmd, begrun);
+ if (!r2t)
+ return -1;
+ if (iscsit_send_recovery_r2t_for_snack(cmd, r2t) < 0)
+ return -1;
+
+ begrun++;
+ }
+
+ return 0;
+}
+
+/*
+ * Generates Offsets and NextBurstLength based on Begrun and Runlength
+ * carried in a Data SNACK or ExpDataSN in TMR TASK_REASSIGN.
+ *
+ * For DataSequenceInOrder=Yes and DataPDUInOrder=[Yes,No] only.
+ *
+ * FIXME: How is this handled for a RData SNACK?
+ */
+int iscsit_create_recovery_datain_values_datasequenceinorder_yes(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain_req *dr)
+{
+ u32 data_sn = 0, data_sn_count = 0;
+ u32 pdu_start = 0, seq_no = 0;
+ u32 begrun = dr->begrun;
+ struct iscsi_conn *conn = cmd->conn;
+
+ while (begrun > data_sn++) {
+ data_sn_count++;
+ if ((dr->next_burst_len +
+ conn->conn_ops->MaxRecvDataSegmentLength) <
+ conn->sess->sess_ops->MaxBurstLength) {
+ dr->read_data_done +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ dr->next_burst_len +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ } else {
+ dr->read_data_done +=
+ (conn->sess->sess_ops->MaxBurstLength -
+ dr->next_burst_len);
+ dr->next_burst_len = 0;
+ pdu_start += data_sn_count;
+ data_sn_count = 0;
+ seq_no++;
+ }
+ }
+
+ if (!conn->sess->sess_ops->DataPDUInOrder) {
+ cmd->seq_no = seq_no;
+ cmd->pdu_start = pdu_start;
+ cmd->pdu_send_order = data_sn_count;
+ }
+
+ return 0;
+}
+
+/*
+ * Generates Offsets and NextBurstLength based on Begrun and Runlength
+ * carried in a Data SNACK or ExpDataSN in TMR TASK_REASSIGN.
+ *
+ * For DataSequenceInOrder=No and DataPDUInOrder=[Yes,No] only.
+ *
+ * FIXME: How is this handled for a RData SNACK?
+ */
+int iscsit_create_recovery_datain_values_datasequenceinorder_no(
+ struct iscsi_cmd *cmd,
+ struct iscsi_datain_req *dr)
+{
+ int found_seq = 0, i;
+ u32 data_sn, read_data_done = 0, seq_send_order = 0;
+ u32 begrun = dr->begrun;
+ u32 runlength = dr->runlength;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_seq *first_seq = NULL, *seq = NULL;
+
+ if (!cmd->seq_list) {
+ pr_err("struct iscsi_cmd->seq_list is NULL!\n");
+ return -1;
+ }
+
+ /*
+ * Calculate read_data_done for all sequences containing a
+ * first_datasn and last_datasn less than the BegRun.
+ *
+ * Locate the struct iscsi_seq the BegRun lies within and calculate
+ * NextBurstLenghth up to the DataSN based on MaxRecvDataSegmentLength.
+ *
+ * Also use struct iscsi_seq->seq_send_order to determine where to start.
+ */
+ for (i = 0; i < cmd->seq_count; i++) {
+ seq = &cmd->seq_list[i];
+
+ if (!seq->seq_send_order)
+ first_seq = seq;
+
+ /*
+ * No data has been transferred for this DataIN sequence, so the
+ * seq->first_datasn and seq->last_datasn have not been set.
+ */
+ if (!seq->sent) {
+#if 0
+ pr_err("Ignoring non-sent sequence 0x%08x ->"
+ " 0x%08x\n\n", seq->first_datasn,
+ seq->last_datasn);
+#endif
+ continue;
+ }
+
+ /*
+ * This DataIN sequence is precedes the received BegRun, add the
+ * total xfer_len of the sequence to read_data_done and reset
+ * seq->pdu_send_order.
+ */
+ if ((seq->first_datasn < begrun) &&
+ (seq->last_datasn < begrun)) {
+#if 0
+ pr_err("Pre BegRun sequence 0x%08x ->"
+ " 0x%08x\n", seq->first_datasn,
+ seq->last_datasn);
+#endif
+ read_data_done += cmd->seq_list[i].xfer_len;
+ seq->next_burst_len = seq->pdu_send_order = 0;
+ continue;
+ }
+
+ /*
+ * The BegRun lies within this DataIN sequence.
+ */
+ if ((seq->first_datasn <= begrun) &&
+ (seq->last_datasn >= begrun)) {
+#if 0
+ pr_err("Found sequence begrun: 0x%08x in"
+ " 0x%08x -> 0x%08x\n", begrun,
+ seq->first_datasn, seq->last_datasn);
+#endif
+ seq_send_order = seq->seq_send_order;
+ data_sn = seq->first_datasn;
+ seq->next_burst_len = seq->pdu_send_order = 0;
+ found_seq = 1;
+
+ /*
+ * For DataPDUInOrder=Yes, while the first DataSN of
+ * the sequence is less than the received BegRun, add
+ * the MaxRecvDataSegmentLength to read_data_done and
+ * to the sequence's next_burst_len;
+ *
+ * For DataPDUInOrder=No, while the first DataSN of the
+ * sequence is less than the received BegRun, find the
+ * struct iscsi_pdu of the DataSN in question and add the
+ * MaxRecvDataSegmentLength to read_data_done and to the
+ * sequence's next_burst_len;
+ */
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ while (data_sn < begrun) {
+ seq->pdu_send_order++;
+ read_data_done +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ seq->next_burst_len +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ data_sn++;
+ }
+ } else {
+ int j;
+ struct iscsi_pdu *pdu;
+
+ while (data_sn < begrun) {
+ seq->pdu_send_order++;
+
+ for (j = 0; j < seq->pdu_count; j++) {
+ pdu = &cmd->pdu_list[
+ seq->pdu_start + j];
+ if (pdu->data_sn == data_sn) {
+ read_data_done +=
+ pdu->length;
+ seq->next_burst_len +=
+ pdu->length;
+ }
+ }
+ data_sn++;
+ }
+ }
+ continue;
+ }
+
+ /*
+ * This DataIN sequence is larger than the received BegRun,
+ * reset seq->pdu_send_order and continue.
+ */
+ if ((seq->first_datasn > begrun) ||
+ (seq->last_datasn > begrun)) {
+#if 0
+ pr_err("Post BegRun sequence 0x%08x -> 0x%08x\n",
+ seq->first_datasn, seq->last_datasn);
+#endif
+ seq->next_burst_len = seq->pdu_send_order = 0;
+ continue;
+ }
+ }
+
+ if (!found_seq) {
+ if (!begrun) {
+ if (!first_seq) {
+ pr_err("ITT: 0x%08x, Begrun: 0x%08x"
+ " but first_seq is NULL\n",
+ cmd->init_task_tag, begrun);
+ return -1;
+ }
+ seq_send_order = first_seq->seq_send_order;
+ seq->next_burst_len = seq->pdu_send_order = 0;
+ goto done;
+ }
+
+ pr_err("Unable to locate struct iscsi_seq for ITT: 0x%08x,"
+ " BegRun: 0x%08x, RunLength: 0x%08x while"
+ " DataSequenceInOrder=No and DataPDUInOrder=%s.\n",
+ cmd->init_task_tag, begrun, runlength,
+ (conn->sess->sess_ops->DataPDUInOrder) ? "Yes" : "No");
+ return -1;
+ }
+
+done:
+ dr->read_data_done = read_data_done;
+ dr->seq_send_order = seq_send_order;
+
+ return 0;
+}
+
+static int iscsit_handle_recovery_datain(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf,
+ u32 begrun,
+ u32 runlength)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+
+ if (!(se_cmd->transport_state & CMD_T_COMPLETE)) {
+ pr_err("Ignoring ITT: 0x%08x Data SNACK\n",
+ cmd->init_task_tag);
+ return 0;
+ }
+
+ /*
+ * Make sure the initiator is not requesting retransmission
+ * of DataSNs already acknowledged by a Data ACK SNACK.
+ */
+ if ((cmd->cmd_flags & ICF_GOT_DATACK_SNACK) &&
+ (begrun <= cmd->acked_data_sn)) {
+ pr_err("ITT: 0x%08x, Data SNACK requesting"
+ " retransmission of DataSN: 0x%08x to 0x%08x but"
+ " already acked to DataSN: 0x%08x by Data ACK SNACK,"
+ " protocol error.\n", cmd->init_task_tag, begrun,
+ (begrun + runlength), cmd->acked_data_sn);
+
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 0, buf, cmd);
+ }
+
+ /*
+ * Make sure BegRun and RunLength in the Data SNACK are sane.
+ * Note: (cmd->data_sn - 1) will carry the maximum DataSN sent.
+ */
+ if ((begrun + runlength) > (cmd->data_sn - 1)) {
+ pr_err("Initiator requesting BegRun: 0x%08x, RunLength"
+ ": 0x%08x greater than maximum DataSN: 0x%08x.\n",
+ begrun, runlength, (cmd->data_sn - 1));
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 0, buf, cmd);
+ }
+
+ dr = iscsit_allocate_datain_req();
+ if (!dr)
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 0, buf, cmd);
+
+ dr->data_sn = dr->begrun = begrun;
+ dr->runlength = runlength;
+ dr->generate_recovery_values = 1;
+ dr->recovery = DATAIN_WITHIN_COMMAND_RECOVERY;
+
+ iscsit_attach_datain_req(cmd, dr);
+
+ cmd->i_state = ISTATE_SEND_DATAIN;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+
+ return 0;
+}
+
+int iscsit_handle_recovery_datain_or_r2t(
+ struct iscsi_conn *conn,
+ unsigned char *buf,
+ u32 init_task_tag,
+ u32 targ_xfer_tag,
+ u32 begrun,
+ u32 runlength)
+{
+ struct iscsi_cmd *cmd;
+
+ cmd = iscsit_find_cmd_from_itt(conn, init_task_tag);
+ if (!cmd)
+ return 0;
+
+ /*
+ * FIXME: This will not work for bidi commands.
+ */
+ switch (cmd->data_direction) {
+ case DMA_TO_DEVICE:
+ return iscsit_handle_r2t_snack(cmd, buf, begrun, runlength);
+ case DMA_FROM_DEVICE:
+ return iscsit_handle_recovery_datain(cmd, buf, begrun,
+ runlength);
+ default:
+ pr_err("Unknown cmd->data_direction: 0x%02x\n",
+ cmd->data_direction);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* #warning FIXME: Status SNACK needs to be dependent on OPCODE!!! */
+int iscsit_handle_status_snack(
+ struct iscsi_conn *conn,
+ u32 init_task_tag,
+ u32 targ_xfer_tag,
+ u32 begrun,
+ u32 runlength)
+{
+ struct iscsi_cmd *cmd = NULL;
+ u32 last_statsn;
+ int found_cmd;
+
+ if (conn->exp_statsn > begrun) {
+ pr_err("Got Status SNACK Begrun: 0x%08x, RunLength:"
+ " 0x%08x but already got ExpStatSN: 0x%08x on CID:"
+ " %hu.\n", begrun, runlength, conn->exp_statsn,
+ conn->cid);
+ return 0;
+ }
+
+ last_statsn = (!runlength) ? conn->stat_sn : (begrun + runlength);
+
+ while (begrun < last_statsn) {
+ found_cmd = 0;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ if (cmd->stat_sn == begrun) {
+ found_cmd = 1;
+ break;
+ }
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+
+ if (!found_cmd) {
+ pr_err("Unable to find StatSN: 0x%08x for"
+ " a Status SNACK, assuming this was a"
+ " protactic SNACK for an untransmitted"
+ " StatSN, ignoring.\n", begrun);
+ begrun++;
+ continue;
+ }
+
+ spin_lock_bh(&cmd->istate_lock);
+ if (cmd->i_state == ISTATE_SEND_DATAIN) {
+ spin_unlock_bh(&cmd->istate_lock);
+ pr_err("Ignoring Status SNACK for BegRun:"
+ " 0x%08x, RunLength: 0x%08x, assuming this was"
+ " a protactic SNACK for an untransmitted"
+ " StatSN\n", begrun, runlength);
+ begrun++;
+ continue;
+ }
+ spin_unlock_bh(&cmd->istate_lock);
+
+ cmd->i_state = ISTATE_SEND_STATUS_RECOVERY;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ begrun++;
+ }
+
+ return 0;
+}
+
+int iscsit_handle_data_ack(
+ struct iscsi_conn *conn,
+ u32 targ_xfer_tag,
+ u32 begrun,
+ u32 runlength)
+{
+ struct iscsi_cmd *cmd = NULL;
+
+ cmd = iscsit_find_cmd_from_ttt(conn, targ_xfer_tag);
+ if (!cmd) {
+ pr_err("Data ACK SNACK for TTT: 0x%08x is"
+ " invalid.\n", targ_xfer_tag);
+ return -1;
+ }
+
+ if (begrun <= cmd->acked_data_sn) {
+ pr_err("ITT: 0x%08x Data ACK SNACK BegRUN: 0x%08x is"
+ " less than the already acked DataSN: 0x%08x.\n",
+ cmd->init_task_tag, begrun, cmd->acked_data_sn);
+ return -1;
+ }
+
+ /*
+ * For Data ACK SNACK, BegRun is the next expected DataSN.
+ * (see iSCSI v19: 10.16.6)
+ */
+ cmd->cmd_flags |= ICF_GOT_DATACK_SNACK;
+ cmd->acked_data_sn = (begrun - 1);
+
+ pr_debug("Received Data ACK SNACK for ITT: 0x%08x,"
+ " updated acked DataSN to 0x%08x.\n",
+ cmd->init_task_tag, cmd->acked_data_sn);
+
+ return 0;
+}
+
+static int iscsit_send_recovery_r2t(
+ struct iscsi_cmd *cmd,
+ u32 offset,
+ u32 xfer_len)
+{
+ int ret;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ ret = iscsit_add_r2t_to_list(cmd, offset, xfer_len, 1, 0);
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return ret;
+}
+
+int iscsit_dataout_datapduinorder_no_fbit(
+ struct iscsi_cmd *cmd,
+ struct iscsi_pdu *pdu)
+{
+ int i, send_recovery_r2t = 0, recovery = 0;
+ u32 length = 0, offset = 0, pdu_count = 0, xfer_len = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *first_pdu = NULL;
+
+ /*
+ * Get an struct iscsi_pdu pointer to the first PDU, and total PDU count
+ * of the DataOUT sequence.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ for (i = 0; i < cmd->pdu_count; i++) {
+ if (cmd->pdu_list[i].seq_no == pdu->seq_no) {
+ if (!first_pdu)
+ first_pdu = &cmd->pdu_list[i];
+ xfer_len += cmd->pdu_list[i].length;
+ pdu_count++;
+ } else if (pdu_count)
+ break;
+ }
+ } else {
+ struct iscsi_seq *seq = cmd->seq_ptr;
+
+ first_pdu = &cmd->pdu_list[seq->pdu_start];
+ pdu_count = seq->pdu_count;
+ }
+
+ if (!first_pdu || !pdu_count)
+ return DATAOUT_CANNOT_RECOVER;
+
+ /*
+ * Loop through the ending DataOUT Sequence checking each struct iscsi_pdu.
+ * The following ugly logic does batching of not received PDUs.
+ */
+ for (i = 0; i < pdu_count; i++) {
+ if (first_pdu[i].status == ISCSI_PDU_RECEIVED_OK) {
+ if (!send_recovery_r2t)
+ continue;
+
+ if (iscsit_send_recovery_r2t(cmd, offset, length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+
+ send_recovery_r2t = length = offset = 0;
+ continue;
+ }
+ /*
+ * Set recovery = 1 for any missing, CRC failed, or timed
+ * out PDUs to let the DataOUT logic know that this sequence
+ * has not been completed yet.
+ *
+ * Also, only send a Recovery R2T for ISCSI_PDU_NOT_RECEIVED.
+ * We assume if the PDU either failed CRC or timed out
+ * that a Recovery R2T has already been sent.
+ */
+ recovery = 1;
+
+ if (first_pdu[i].status != ISCSI_PDU_NOT_RECEIVED)
+ continue;
+
+ if (!offset)
+ offset = first_pdu[i].offset;
+ length += first_pdu[i].length;
+
+ send_recovery_r2t = 1;
+ }
+
+ if (send_recovery_r2t)
+ if (iscsit_send_recovery_r2t(cmd, offset, length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+
+ return (!recovery) ? DATAOUT_NORMAL : DATAOUT_WITHIN_COMMAND_RECOVERY;
+}
+
+static int iscsit_recalculate_dataout_values(
+ struct iscsi_cmd *cmd,
+ u32 pdu_offset,
+ u32 pdu_length,
+ u32 *r2t_offset,
+ u32 *r2t_length)
+{
+ int i;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *pdu = NULL;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ cmd->data_sn = 0;
+
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ *r2t_offset = cmd->write_data_done;
+ *r2t_length = (cmd->seq_end_offset -
+ cmd->write_data_done);
+ return 0;
+ }
+
+ *r2t_offset = cmd->seq_start_offset;
+ *r2t_length = (cmd->seq_end_offset - cmd->seq_start_offset);
+
+ for (i = 0; i < cmd->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ if ((pdu->offset >= cmd->seq_start_offset) &&
+ ((pdu->offset + pdu->length) <=
+ cmd->seq_end_offset)) {
+ if (!cmd->unsolicited_data)
+ cmd->next_burst_len -= pdu->length;
+ else
+ cmd->first_burst_len -= pdu->length;
+
+ cmd->write_data_done -= pdu->length;
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+ } else {
+ struct iscsi_seq *seq = NULL;
+
+ seq = iscsit_get_seq_holder(cmd, pdu_offset, pdu_length);
+ if (!seq)
+ return -1;
+
+ *r2t_offset = seq->orig_offset;
+ *r2t_length = seq->xfer_len;
+
+ cmd->write_data_done -= (seq->offset - seq->orig_offset);
+ if (cmd->immediate_data)
+ cmd->first_burst_len = cmd->write_data_done;
+
+ seq->data_sn = 0;
+ seq->offset = seq->orig_offset;
+ seq->next_burst_len = 0;
+ seq->status = DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY;
+
+ if (conn->sess->sess_ops->DataPDUInOrder)
+ return 0;
+
+ for (i = 0; i < seq->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i+seq->pdu_start];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+
+ return 0;
+}
+
+int iscsit_recover_dataout_sequence(
+ struct iscsi_cmd *cmd,
+ u32 pdu_offset,
+ u32 pdu_length)
+{
+ u32 r2t_length = 0, r2t_offset = 0;
+
+ spin_lock_bh(&cmd->istate_lock);
+ cmd->cmd_flags |= ICF_WITHIN_COMMAND_RECOVERY;
+ spin_unlock_bh(&cmd->istate_lock);
+
+ if (iscsit_recalculate_dataout_values(cmd, pdu_offset, pdu_length,
+ &r2t_offset, &r2t_length) < 0)
+ return DATAOUT_CANNOT_RECOVER;
+
+ iscsit_send_recovery_r2t(cmd, r2t_offset, r2t_length);
+
+ return DATAOUT_WITHIN_COMMAND_RECOVERY;
+}
+
+static struct iscsi_ooo_cmdsn *iscsit_allocate_ooo_cmdsn(void)
+{
+ struct iscsi_ooo_cmdsn *ooo_cmdsn = NULL;
+
+ ooo_cmdsn = kmem_cache_zalloc(lio_ooo_cache, GFP_ATOMIC);
+ if (!ooo_cmdsn) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_ooo_cmdsn.\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&ooo_cmdsn->ooo_list);
+
+ return ooo_cmdsn;
+}
+
+/*
+ * Called with sess->cmdsn_mutex held.
+ */
+static int iscsit_attach_ooo_cmdsn(
+ struct iscsi_session *sess,
+ struct iscsi_ooo_cmdsn *ooo_cmdsn)
+{
+ struct iscsi_ooo_cmdsn *ooo_tail, *ooo_tmp;
+ /*
+ * We attach the struct iscsi_ooo_cmdsn entry to the out of order
+ * list in increasing CmdSN order.
+ * This allows iscsi_execute_ooo_cmdsns() to detect any
+ * additional CmdSN holes while performing delayed execution.
+ */
+ if (list_empty(&sess->sess_ooo_cmdsn_list))
+ list_add_tail(&ooo_cmdsn->ooo_list,
+ &sess->sess_ooo_cmdsn_list);
+ else {
+ ooo_tail = list_entry(sess->sess_ooo_cmdsn_list.prev,
+ typeof(*ooo_tail), ooo_list);
+ /*
+ * CmdSN is greater than the tail of the list.
+ */
+ if (iscsi_sna_lt(ooo_tail->cmdsn, ooo_cmdsn->cmdsn))
+ list_add_tail(&ooo_cmdsn->ooo_list,
+ &sess->sess_ooo_cmdsn_list);
+ else {
+ /*
+ * CmdSN is either lower than the head, or somewhere
+ * in the middle.
+ */
+ list_for_each_entry(ooo_tmp, &sess->sess_ooo_cmdsn_list,
+ ooo_list) {
+ if (iscsi_sna_lt(ooo_tmp->cmdsn, ooo_cmdsn->cmdsn))
+ continue;
+
+ /* Insert before this entry */
+ list_add(&ooo_cmdsn->ooo_list,
+ ooo_tmp->ooo_list.prev);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Removes an struct iscsi_ooo_cmdsn from a session's list,
+ * called with struct iscsi_session->cmdsn_mutex held.
+ */
+void iscsit_remove_ooo_cmdsn(
+ struct iscsi_session *sess,
+ struct iscsi_ooo_cmdsn *ooo_cmdsn)
+{
+ list_del(&ooo_cmdsn->ooo_list);
+ kmem_cache_free(lio_ooo_cache, ooo_cmdsn);
+}
+
+void iscsit_clear_ooo_cmdsns_for_conn(struct iscsi_conn *conn)
+{
+ struct iscsi_ooo_cmdsn *ooo_cmdsn;
+ struct iscsi_session *sess = conn->sess;
+
+ mutex_lock(&sess->cmdsn_mutex);
+ list_for_each_entry(ooo_cmdsn, &sess->sess_ooo_cmdsn_list, ooo_list) {
+ if (ooo_cmdsn->cid != conn->cid)
+ continue;
+
+ ooo_cmdsn->cmd = NULL;
+ }
+ mutex_unlock(&sess->cmdsn_mutex);
+}
+
+/*
+ * Called with sess->cmdsn_mutex held.
+ */
+int iscsit_execute_ooo_cmdsns(struct iscsi_session *sess)
+{
+ int ooo_count = 0;
+ struct iscsi_cmd *cmd = NULL;
+ struct iscsi_ooo_cmdsn *ooo_cmdsn, *ooo_cmdsn_tmp;
+
+ list_for_each_entry_safe(ooo_cmdsn, ooo_cmdsn_tmp,
+ &sess->sess_ooo_cmdsn_list, ooo_list) {
+ if (ooo_cmdsn->cmdsn != sess->exp_cmd_sn)
+ continue;
+
+ if (!ooo_cmdsn->cmd) {
+ sess->exp_cmd_sn++;
+ iscsit_remove_ooo_cmdsn(sess, ooo_cmdsn);
+ continue;
+ }
+
+ cmd = ooo_cmdsn->cmd;
+ cmd->i_state = cmd->deferred_i_state;
+ ooo_count++;
+ sess->exp_cmd_sn++;
+ pr_debug("Executing out of order CmdSN: 0x%08x,"
+ " incremented ExpCmdSN to 0x%08x.\n",
+ cmd->cmd_sn, sess->exp_cmd_sn);
+
+ iscsit_remove_ooo_cmdsn(sess, ooo_cmdsn);
+
+ if (iscsit_execute_cmd(cmd, 1) < 0)
+ return -1;
+
+ continue;
+ }
+
+ return ooo_count;
+}
+
+/*
+ * Called either:
+ *
+ * 1. With sess->cmdsn_mutex held from iscsi_execute_ooo_cmdsns()
+ * or iscsi_check_received_cmdsn().
+ * 2. With no locks held directly from iscsi_handle_XXX_pdu() functions
+ * for immediate commands.
+ */
+int iscsit_execute_cmd(struct iscsi_cmd *cmd, int ooo)
+{
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+ int lr = 0;
+
+ spin_lock_bh(&cmd->istate_lock);
+ if (ooo)
+ cmd->cmd_flags &= ~ICF_OOO_CMDSN;
+
+ switch (cmd->iscsi_opcode) {
+ case ISCSI_OP_SCSI_CMD:
+ /*
+ * Go ahead and send the CHECK_CONDITION status for
+ * any SCSI CDB exceptions that may have occurred, also
+ * handle the SCF_SCSI_RESERVATION_CONFLICT case here as well.
+ */
+ if (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION) {
+ if (se_cmd->scsi_sense_reason == TCM_RESERVATION_CONFLICT) {
+ cmd->i_state = ISTATE_SEND_STATUS;
+ spin_unlock_bh(&cmd->istate_lock);
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn,
+ cmd->i_state);
+ return 0;
+ }
+ spin_unlock_bh(&cmd->istate_lock);
+ /*
+ * Determine if delayed TASK_ABORTED status for WRITEs
+ * should be sent now if no unsolicited data out
+ * payloads are expected, or if the delayed status
+ * should be sent after unsolicited data out with
+ * ISCSI_FLAG_CMD_FINAL set in iscsi_handle_data_out()
+ */
+ if (transport_check_aborted_status(se_cmd,
+ (cmd->unsolicited_data == 0)) != 0)
+ return 0;
+ /*
+ * Otherwise send CHECK_CONDITION and sense for
+ * exception
+ */
+ return transport_send_check_condition_and_sense(se_cmd,
+ se_cmd->scsi_sense_reason, 0);
+ }
+ /*
+ * Special case for delayed CmdSN with Immediate
+ * Data and/or Unsolicited Data Out attached.
+ */
+ if (cmd->immediate_data) {
+ if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
+ spin_unlock_bh(&cmd->istate_lock);
+ return transport_generic_handle_data(
+ &cmd->se_cmd);
+ }
+ spin_unlock_bh(&cmd->istate_lock);
+
+ if (!(cmd->cmd_flags &
+ ICF_NON_IMMEDIATE_UNSOLICITED_DATA)) {
+ /*
+ * Send the delayed TASK_ABORTED status for
+ * WRITEs if no more unsolicitied data is
+ * expected.
+ */
+ if (transport_check_aborted_status(se_cmd, 1)
+ != 0)
+ return 0;
+
+ iscsit_set_dataout_sequence_values(cmd);
+ iscsit_build_r2ts_for_cmd(cmd, cmd->conn, 0);
+ }
+ return 0;
+ }
+ /*
+ * The default handler.
+ */
+ spin_unlock_bh(&cmd->istate_lock);
+
+ if ((cmd->data_direction == DMA_TO_DEVICE) &&
+ !(cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA)) {
+ /*
+ * Send the delayed TASK_ABORTED status for WRITEs if
+ * no more nsolicitied data is expected.
+ */
+ if (transport_check_aborted_status(se_cmd, 1) != 0)
+ return 0;
+
+ iscsit_set_dataout_sequence_values(cmd);
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ iscsit_start_dataout_timer(cmd, cmd->conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ }
+ return transport_handle_cdb_direct(&cmd->se_cmd);
+
+ case ISCSI_OP_NOOP_OUT:
+ case ISCSI_OP_TEXT:
+ spin_unlock_bh(&cmd->istate_lock);
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
+ break;
+ case ISCSI_OP_SCSI_TMFUNC:
+ if (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION) {
+ spin_unlock_bh(&cmd->istate_lock);
+ iscsit_add_cmd_to_response_queue(cmd, cmd->conn,
+ cmd->i_state);
+ return 0;
+ }
+ spin_unlock_bh(&cmd->istate_lock);
+
+ return transport_generic_handle_tmr(&cmd->se_cmd);
+ case ISCSI_OP_LOGOUT:
+ spin_unlock_bh(&cmd->istate_lock);
+ switch (cmd->logout_reason) {
+ case ISCSI_LOGOUT_REASON_CLOSE_SESSION:
+ lr = iscsit_logout_closesession(cmd, cmd->conn);
+ break;
+ case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
+ lr = iscsit_logout_closeconnection(cmd, cmd->conn);
+ break;
+ case ISCSI_LOGOUT_REASON_RECOVERY:
+ lr = iscsit_logout_removeconnforrecovery(cmd, cmd->conn);
+ break;
+ default:
+ pr_err("Unknown iSCSI Logout Request Code:"
+ " 0x%02x\n", cmd->logout_reason);
+ return -1;
+ }
+
+ return lr;
+ default:
+ spin_unlock_bh(&cmd->istate_lock);
+ pr_err("Cannot perform out of order execution for"
+ " unknown iSCSI Opcode: 0x%02x\n", cmd->iscsi_opcode);
+ return -1;
+ }
+
+ return 0;
+}
+
+void iscsit_free_all_ooo_cmdsns(struct iscsi_session *sess)
+{
+ struct iscsi_ooo_cmdsn *ooo_cmdsn, *ooo_cmdsn_tmp;
+
+ mutex_lock(&sess->cmdsn_mutex);
+ list_for_each_entry_safe(ooo_cmdsn, ooo_cmdsn_tmp,
+ &sess->sess_ooo_cmdsn_list, ooo_list) {
+
+ list_del(&ooo_cmdsn->ooo_list);
+ kmem_cache_free(lio_ooo_cache, ooo_cmdsn);
+ }
+ mutex_unlock(&sess->cmdsn_mutex);
+}
+
+int iscsit_handle_ooo_cmdsn(
+ struct iscsi_session *sess,
+ struct iscsi_cmd *cmd,
+ u32 cmdsn)
+{
+ int batch = 0;
+ struct iscsi_ooo_cmdsn *ooo_cmdsn = NULL, *ooo_tail = NULL;
+
+ cmd->deferred_i_state = cmd->i_state;
+ cmd->i_state = ISTATE_DEFERRED_CMD;
+ cmd->cmd_flags |= ICF_OOO_CMDSN;
+
+ if (list_empty(&sess->sess_ooo_cmdsn_list))
+ batch = 1;
+ else {
+ ooo_tail = list_entry(sess->sess_ooo_cmdsn_list.prev,
+ typeof(*ooo_tail), ooo_list);
+ if (ooo_tail->cmdsn != (cmdsn - 1))
+ batch = 1;
+ }
+
+ ooo_cmdsn = iscsit_allocate_ooo_cmdsn();
+ if (!ooo_cmdsn)
+ return CMDSN_ERROR_CANNOT_RECOVER;
+
+ ooo_cmdsn->cmd = cmd;
+ ooo_cmdsn->batch_count = (batch) ?
+ (cmdsn - sess->exp_cmd_sn) : 1;
+ ooo_cmdsn->cid = cmd->conn->cid;
+ ooo_cmdsn->exp_cmdsn = sess->exp_cmd_sn;
+ ooo_cmdsn->cmdsn = cmdsn;
+
+ if (iscsit_attach_ooo_cmdsn(sess, ooo_cmdsn) < 0) {
+ kmem_cache_free(lio_ooo_cache, ooo_cmdsn);
+ return CMDSN_ERROR_CANNOT_RECOVER;
+ }
+
+ return CMDSN_HIGHER_THAN_EXP;
+}
+
+static int iscsit_set_dataout_timeout_values(
+ struct iscsi_cmd *cmd,
+ u32 *offset,
+ u32 *length)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_r2t *r2t;
+
+ if (cmd->unsolicited_data) {
+ *offset = 0;
+ *length = (conn->sess->sess_ops->FirstBurstLength >
+ cmd->data_length) ?
+ cmd->data_length :
+ conn->sess->sess_ops->FirstBurstLength;
+ return 0;
+ }
+
+ spin_lock_bh(&cmd->r2t_lock);
+ if (list_empty(&cmd->cmd_r2t_list)) {
+ pr_err("cmd->cmd_r2t_list is empty!\n");
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
+ if (r2t->sent_r2t && !r2t->recovery_r2t && !r2t->seq_complete) {
+ *offset = r2t->offset;
+ *length = r2t->xfer_len;
+ spin_unlock_bh(&cmd->r2t_lock);
+ return 0;
+ }
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ pr_err("Unable to locate any incomplete DataOUT"
+ " sequences for ITT: 0x%08x.\n", cmd->init_task_tag);
+
+ return -1;
+}
+
+/*
+ * NOTE: Called from interrupt (timer) context.
+ */
+static void iscsit_handle_dataout_timeout(unsigned long data)
+{
+ u32 pdu_length = 0, pdu_offset = 0;
+ u32 r2t_length = 0, r2t_offset = 0;
+ struct iscsi_cmd *cmd = (struct iscsi_cmd *) data;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_session *sess = NULL;
+ struct iscsi_node_attrib *na;
+
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ if (cmd->dataout_timer_flags & ISCSI_TF_STOP) {
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ iscsit_dec_conn_usage_count(conn);
+ return;
+ }
+ cmd->dataout_timer_flags &= ~ISCSI_TF_RUNNING;
+ sess = conn->sess;
+ na = iscsit_tpg_get_node_attrib(sess);
+
+ if (!sess->sess_ops->ErrorRecoveryLevel) {
+ pr_debug("Unable to recover from DataOut timeout while"
+ " in ERL=0.\n");
+ goto failure;
+ }
+
+ if (++cmd->dataout_timeout_retries == na->dataout_timeout_retries) {
+ pr_debug("Command ITT: 0x%08x exceeded max retries"
+ " for DataOUT timeout %u, closing iSCSI connection.\n",
+ cmd->init_task_tag, na->dataout_timeout_retries);
+ goto failure;
+ }
+
+ cmd->cmd_flags |= ICF_WITHIN_COMMAND_RECOVERY;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ pdu_offset = cmd->write_data_done;
+ if ((pdu_offset + (conn->sess->sess_ops->MaxBurstLength -
+ cmd->next_burst_len)) > cmd->data_length)
+ pdu_length = (cmd->data_length -
+ cmd->write_data_done);
+ else
+ pdu_length = (conn->sess->sess_ops->MaxBurstLength -
+ cmd->next_burst_len);
+ } else {
+ pdu_offset = cmd->seq_start_offset;
+ pdu_length = (cmd->seq_end_offset -
+ cmd->seq_start_offset);
+ }
+ } else {
+ if (iscsit_set_dataout_timeout_values(cmd, &pdu_offset,
+ &pdu_length) < 0)
+ goto failure;
+ }
+
+ if (iscsit_recalculate_dataout_values(cmd, pdu_offset, pdu_length,
+ &r2t_offset, &r2t_length) < 0)
+ goto failure;
+
+ pr_debug("Command ITT: 0x%08x timed out waiting for"
+ " completion of %sDataOUT Sequence Offset: %u, Length: %u\n",
+ cmd->init_task_tag, (cmd->unsolicited_data) ? "Unsolicited " :
+ "", r2t_offset, r2t_length);
+
+ if (iscsit_send_recovery_r2t(cmd, r2t_offset, r2t_length) < 0)
+ goto failure;
+
+ iscsit_start_dataout_timer(cmd, conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ iscsit_dec_conn_usage_count(conn);
+
+ return;
+
+failure:
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ iscsit_cause_connection_reinstatement(conn, 0);
+ iscsit_dec_conn_usage_count(conn);
+}
+
+void iscsit_mod_dataout_timer(struct iscsi_cmd *cmd)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ if (!(cmd->dataout_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ return;
+ }
+
+ mod_timer(&cmd->dataout_timer,
+ (get_jiffies_64() + na->dataout_timeout * HZ));
+ pr_debug("Updated DataOUT timer for ITT: 0x%08x",
+ cmd->init_task_tag);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+}
+
+/*
+ * Called with cmd->dataout_timeout_lock held.
+ */
+void iscsit_start_dataout_timer(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+
+ if (cmd->dataout_timer_flags & ISCSI_TF_RUNNING)
+ return;
+
+ pr_debug("Starting DataOUT timer for ITT: 0x%08x on"
+ " CID: %hu.\n", cmd->init_task_tag, conn->cid);
+
+ init_timer(&cmd->dataout_timer);
+ cmd->dataout_timer.expires = (get_jiffies_64() + na->dataout_timeout * HZ);
+ cmd->dataout_timer.data = (unsigned long)cmd;
+ cmd->dataout_timer.function = iscsit_handle_dataout_timeout;
+ cmd->dataout_timer_flags &= ~ISCSI_TF_STOP;
+ cmd->dataout_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&cmd->dataout_timer);
+}
+
+void iscsit_stop_dataout_timer(struct iscsi_cmd *cmd)
+{
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ if (!(cmd->dataout_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+ return;
+ }
+ cmd->dataout_timer_flags |= ISCSI_TF_STOP;
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+
+ del_timer_sync(&cmd->dataout_timer);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ cmd->dataout_timer_flags &= ~ISCSI_TF_RUNNING;
+ pr_debug("Stopped DataOUT Timer for ITT: 0x%08x\n",
+ cmd->init_task_tag);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.h
new file mode 100644
index 0000000..85e67e2
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl1.h
@@ -0,0 +1,26 @@
+#ifndef ISCSI_TARGET_ERL1_H
+#define ISCSI_TARGET_ERL1_H
+
+extern int iscsit_dump_data_payload(struct iscsi_conn *, u32, int);
+extern int iscsit_create_recovery_datain_values_datasequenceinorder_yes(
+ struct iscsi_cmd *, struct iscsi_datain_req *);
+extern int iscsit_create_recovery_datain_values_datasequenceinorder_no(
+ struct iscsi_cmd *, struct iscsi_datain_req *);
+extern int iscsit_handle_recovery_datain_or_r2t(struct iscsi_conn *, unsigned char *,
+ u32, u32, u32, u32);
+extern int iscsit_handle_status_snack(struct iscsi_conn *, u32, u32,
+ u32, u32);
+extern int iscsit_handle_data_ack(struct iscsi_conn *, u32, u32, u32);
+extern int iscsit_dataout_datapduinorder_no_fbit(struct iscsi_cmd *, struct iscsi_pdu *);
+extern int iscsit_recover_dataout_sequence(struct iscsi_cmd *, u32, u32);
+extern void iscsit_clear_ooo_cmdsns_for_conn(struct iscsi_conn *);
+extern void iscsit_free_all_ooo_cmdsns(struct iscsi_session *);
+extern int iscsit_execute_ooo_cmdsns(struct iscsi_session *);
+extern int iscsit_execute_cmd(struct iscsi_cmd *, int);
+extern int iscsit_handle_ooo_cmdsn(struct iscsi_session *, struct iscsi_cmd *, u32);
+extern void iscsit_remove_ooo_cmdsn(struct iscsi_session *, struct iscsi_ooo_cmdsn *);
+extern void iscsit_mod_dataout_timer(struct iscsi_cmd *);
+extern void iscsit_start_dataout_timer(struct iscsi_cmd *, struct iscsi_conn *);
+extern void iscsit_stop_dataout_timer(struct iscsi_cmd *);
+
+#endif /* ISCSI_TARGET_ERL1_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.c
new file mode 100644
index 0000000..1af1f21
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.c
@@ -0,0 +1,439 @@
+/*******************************************************************************
+ * This file contains error recovery level two functions used by
+ * the iSCSI Target driver.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_datain_values.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target.h"
+
+/*
+ * FIXME: Does RData SNACK apply here as well?
+ */
+void iscsit_create_conn_recovery_datain_values(
+ struct iscsi_cmd *cmd,
+ u32 exp_data_sn)
+{
+ u32 data_sn = 0;
+ struct iscsi_conn *conn = cmd->conn;
+
+ cmd->next_burst_len = 0;
+ cmd->read_data_done = 0;
+
+ while (exp_data_sn > data_sn) {
+ if ((cmd->next_burst_len +
+ conn->conn_ops->MaxRecvDataSegmentLength) <
+ conn->sess->sess_ops->MaxBurstLength) {
+ cmd->read_data_done +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ cmd->next_burst_len +=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ } else {
+ cmd->read_data_done +=
+ (conn->sess->sess_ops->MaxBurstLength -
+ cmd->next_burst_len);
+ cmd->next_burst_len = 0;
+ }
+ data_sn++;
+ }
+}
+
+void iscsit_create_conn_recovery_dataout_values(
+ struct iscsi_cmd *cmd)
+{
+ u32 write_data_done = 0;
+ struct iscsi_conn *conn = cmd->conn;
+
+ cmd->data_sn = 0;
+ cmd->next_burst_len = 0;
+
+ while (cmd->write_data_done > write_data_done) {
+ if ((write_data_done + conn->sess->sess_ops->MaxBurstLength) <=
+ cmd->write_data_done)
+ write_data_done += conn->sess->sess_ops->MaxBurstLength;
+ else
+ break;
+ }
+
+ cmd->write_data_done = write_data_done;
+}
+
+static int iscsit_attach_active_connection_recovery_entry(
+ struct iscsi_session *sess,
+ struct iscsi_conn_recovery *cr)
+{
+ spin_lock(&sess->cr_a_lock);
+ list_add_tail(&cr->cr_list, &sess->cr_active_list);
+ spin_unlock(&sess->cr_a_lock);
+
+ return 0;
+}
+
+static int iscsit_attach_inactive_connection_recovery_entry(
+ struct iscsi_session *sess,
+ struct iscsi_conn_recovery *cr)
+{
+ spin_lock(&sess->cr_i_lock);
+ list_add_tail(&cr->cr_list, &sess->cr_inactive_list);
+
+ sess->conn_recovery_count++;
+ pr_debug("Incremented connection recovery count to %u for"
+ " SID: %u\n", sess->conn_recovery_count, sess->sid);
+ spin_unlock(&sess->cr_i_lock);
+
+ return 0;
+}
+
+struct iscsi_conn_recovery *iscsit_get_inactive_connection_recovery_entry(
+ struct iscsi_session *sess,
+ u16 cid)
+{
+ struct iscsi_conn_recovery *cr;
+
+ spin_lock(&sess->cr_i_lock);
+ list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {
+ if (cr->cid == cid) {
+ spin_unlock(&sess->cr_i_lock);
+ return cr;
+ }
+ }
+ spin_unlock(&sess->cr_i_lock);
+
+ return NULL;
+}
+
+void iscsit_free_connection_recovery_entires(struct iscsi_session *sess)
+{
+ struct iscsi_cmd *cmd, *cmd_tmp;
+ struct iscsi_conn_recovery *cr, *cr_tmp;
+
+ spin_lock(&sess->cr_a_lock);
+ list_for_each_entry_safe(cr, cr_tmp, &sess->cr_active_list, cr_list) {
+ list_del(&cr->cr_list);
+ spin_unlock(&sess->cr_a_lock);
+
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp,
+ &cr->conn_recovery_cmd_list, i_list) {
+
+ list_del(&cmd->i_list);
+ cmd->conn = NULL;
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ }
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ spin_lock(&sess->cr_a_lock);
+
+ kfree(cr);
+ }
+ spin_unlock(&sess->cr_a_lock);
+
+ spin_lock(&sess->cr_i_lock);
+ list_for_each_entry_safe(cr, cr_tmp, &sess->cr_inactive_list, cr_list) {
+ list_del(&cr->cr_list);
+ spin_unlock(&sess->cr_i_lock);
+
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp,
+ &cr->conn_recovery_cmd_list, i_list) {
+
+ list_del(&cmd->i_list);
+ cmd->conn = NULL;
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ }
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ spin_lock(&sess->cr_i_lock);
+
+ kfree(cr);
+ }
+ spin_unlock(&sess->cr_i_lock);
+}
+
+int iscsit_remove_active_connection_recovery_entry(
+ struct iscsi_conn_recovery *cr,
+ struct iscsi_session *sess)
+{
+ spin_lock(&sess->cr_a_lock);
+ list_del(&cr->cr_list);
+
+ sess->conn_recovery_count--;
+ pr_debug("Decremented connection recovery count to %u for"
+ " SID: %u\n", sess->conn_recovery_count, sess->sid);
+ spin_unlock(&sess->cr_a_lock);
+
+ kfree(cr);
+
+ return 0;
+}
+
+int iscsit_remove_inactive_connection_recovery_entry(
+ struct iscsi_conn_recovery *cr,
+ struct iscsi_session *sess)
+{
+ spin_lock(&sess->cr_i_lock);
+ list_del(&cr->cr_list);
+ spin_unlock(&sess->cr_i_lock);
+
+ return 0;
+}
+
+/*
+ * Called with cr->conn_recovery_cmd_lock help.
+ */
+int iscsit_remove_cmd_from_connection_recovery(
+ struct iscsi_cmd *cmd,
+ struct iscsi_session *sess)
+{
+ struct iscsi_conn_recovery *cr;
+
+ if (!cmd->cr) {
+ pr_err("struct iscsi_conn_recovery pointer for ITT: 0x%08x"
+ " is NULL!\n", cmd->init_task_tag);
+ BUG();
+ }
+ cr = cmd->cr;
+
+ list_del(&cmd->i_list);
+ return --cr->cmd_count;
+}
+
+void iscsit_discard_cr_cmds_by_expstatsn(
+ struct iscsi_conn_recovery *cr,
+ u32 exp_statsn)
+{
+ u32 dropped_count = 0;
+ struct iscsi_cmd *cmd, *cmd_tmp;
+ struct iscsi_session *sess = cr->sess;
+
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp,
+ &cr->conn_recovery_cmd_list, i_list) {
+
+ if (((cmd->deferred_i_state != ISTATE_SENT_STATUS) &&
+ (cmd->deferred_i_state != ISTATE_REMOVE)) ||
+ (cmd->stat_sn >= exp_statsn)) {
+ continue;
+ }
+
+ dropped_count++;
+ pr_debug("Dropping Acknowledged ITT: 0x%08x, StatSN:"
+ " 0x%08x, CID: %hu.\n", cmd->init_task_tag,
+ cmd->stat_sn, cr->cid);
+
+ iscsit_remove_cmd_from_connection_recovery(cmd, sess);
+
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ }
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+
+ pr_debug("Dropped %u total acknowledged commands on"
+ " CID: %hu less than old ExpStatSN: 0x%08x\n",
+ dropped_count, cr->cid, exp_statsn);
+
+ if (!cr->cmd_count) {
+ pr_debug("No commands to be reassigned for failed"
+ " connection CID: %hu on SID: %u\n",
+ cr->cid, sess->sid);
+ iscsit_remove_inactive_connection_recovery_entry(cr, sess);
+ iscsit_attach_active_connection_recovery_entry(sess, cr);
+ pr_debug("iSCSI connection recovery successful for CID:"
+ " %hu on SID: %u\n", cr->cid, sess->sid);
+ iscsit_remove_active_connection_recovery_entry(cr, sess);
+ } else {
+ iscsit_remove_inactive_connection_recovery_entry(cr, sess);
+ iscsit_attach_active_connection_recovery_entry(sess, cr);
+ }
+}
+
+int iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(struct iscsi_conn *conn)
+{
+ u32 dropped_count = 0;
+ struct iscsi_cmd *cmd, *cmd_tmp;
+ struct iscsi_ooo_cmdsn *ooo_cmdsn, *ooo_cmdsn_tmp;
+ struct iscsi_session *sess = conn->sess;
+
+ mutex_lock(&sess->cmdsn_mutex);
+ list_for_each_entry_safe(ooo_cmdsn, ooo_cmdsn_tmp,
+ &sess->sess_ooo_cmdsn_list, ooo_list) {
+
+ if (ooo_cmdsn->cid != conn->cid)
+ continue;
+
+ dropped_count++;
+ pr_debug("Dropping unacknowledged CmdSN:"
+ " 0x%08x during connection recovery on CID: %hu\n",
+ ooo_cmdsn->cmdsn, conn->cid);
+ iscsit_remove_ooo_cmdsn(sess, ooo_cmdsn);
+ }
+ mutex_unlock(&sess->cmdsn_mutex);
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_list) {
+ if (!(cmd->cmd_flags & ICF_OOO_CMDSN))
+ continue;
+
+ list_del(&cmd->i_list);
+
+ spin_unlock_bh(&conn->cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock_bh(&conn->cmd_lock);
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+
+ pr_debug("Dropped %u total unacknowledged commands on CID:"
+ " %hu for ExpCmdSN: 0x%08x.\n", dropped_count, conn->cid,
+ sess->exp_cmd_sn);
+ return 0;
+}
+
+int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
+{
+ u32 cmd_count = 0;
+ struct iscsi_cmd *cmd, *cmd_tmp;
+ struct iscsi_conn_recovery *cr;
+
+ /*
+ * Allocate an struct iscsi_conn_recovery for this connection.
+ * Each struct iscsi_cmd contains an struct iscsi_conn_recovery pointer
+ * (struct iscsi_cmd->cr) so we need to allocate this before preparing the
+ * connection's command list for connection recovery.
+ */
+ cr = kzalloc(sizeof(struct iscsi_conn_recovery), GFP_KERNEL);
+ if (!cr) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_conn_recovery.\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&cr->cr_list);
+ INIT_LIST_HEAD(&cr->conn_recovery_cmd_list);
+ spin_lock_init(&cr->conn_recovery_cmd_lock);
+ /*
+ * Only perform connection recovery on ISCSI_OP_SCSI_CMD or
+ * ISCSI_OP_NOOP_OUT opcodes. For all other opcodes call
+ * list_del(&cmd->i_list); to release the command to the
+ * session pool and remove it from the connection's list.
+ *
+ * Also stop the DataOUT timer, which will be restarted after
+ * sending the TMR response.
+ */
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_list) {
+
+ if ((cmd->iscsi_opcode != ISCSI_OP_SCSI_CMD) &&
+ (cmd->iscsi_opcode != ISCSI_OP_NOOP_OUT)) {
+ pr_debug("Not performing realligence on"
+ " Opcode: 0x%02x, ITT: 0x%08x, CmdSN: 0x%08x,"
+ " CID: %hu\n", cmd->iscsi_opcode,
+ cmd->init_task_tag, cmd->cmd_sn, conn->cid);
+
+ list_del(&cmd->i_list);
+ spin_unlock_bh(&conn->cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock_bh(&conn->cmd_lock);
+ continue;
+ }
+
+ /*
+ * Special case where commands greater than or equal to
+ * the session's ExpCmdSN are attached to the connection
+ * list but not to the out of order CmdSN list. The one
+ * obvious case is when a command with immediate data
+ * attached must only check the CmdSN against ExpCmdSN
+ * after the data is received. The special case below
+ * is when the connection fails before data is received,
+ * but also may apply to other PDUs, so it has been
+ * made generic here.
+ */
+ if (!(cmd->cmd_flags & ICF_OOO_CMDSN) && !cmd->immediate_cmd &&
+ (cmd->cmd_sn >= conn->sess->exp_cmd_sn)) {
+ list_del(&cmd->i_list);
+ spin_unlock_bh(&conn->cmd_lock);
+ iscsit_free_cmd(cmd);
+ spin_lock_bh(&conn->cmd_lock);
+ continue;
+ }
+
+ cmd_count++;
+ pr_debug("Preparing Opcode: 0x%02x, ITT: 0x%08x,"
+ " CmdSN: 0x%08x, StatSN: 0x%08x, CID: %hu for"
+ " realligence.\n", cmd->iscsi_opcode,
+ cmd->init_task_tag, cmd->cmd_sn, cmd->stat_sn,
+ conn->cid);
+
+ cmd->deferred_i_state = cmd->i_state;
+ cmd->i_state = ISTATE_IN_CONNECTION_RECOVERY;
+
+ if (cmd->data_direction == DMA_TO_DEVICE)
+ iscsit_stop_dataout_timer(cmd);
+
+ cmd->sess = conn->sess;
+
+ list_del(&cmd->i_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ iscsit_free_all_datain_reqs(cmd);
+
+ transport_wait_for_tasks(&cmd->se_cmd);
+ /*
+ * Add the struct iscsi_cmd to the connection recovery cmd list
+ */
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_add_tail(&cmd->i_list, &cr->conn_recovery_cmd_list);
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+
+ spin_lock_bh(&conn->cmd_lock);
+ cmd->cr = cr;
+ cmd->conn = NULL;
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+ /*
+ * Fill in the various values in the preallocated struct iscsi_conn_recovery.
+ */
+ cr->cid = conn->cid;
+ cr->cmd_count = cmd_count;
+ cr->maxrecvdatasegmentlength = conn->conn_ops->MaxRecvDataSegmentLength;
+ cr->sess = conn->sess;
+
+ iscsit_attach_inactive_connection_recovery_entry(conn->sess, cr);
+
+ return 0;
+}
+
+int iscsit_connection_recovery_transport_reset(struct iscsi_conn *conn)
+{
+ atomic_set(&conn->connection_recovery, 1);
+
+ if (iscsit_close_connection(conn) < 0)
+ return -1;
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.h
new file mode 100644
index 0000000..22f8d24
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_erl2.h
@@ -0,0 +1,18 @@
+#ifndef ISCSI_TARGET_ERL2_H
+#define ISCSI_TARGET_ERL2_H
+
+extern void iscsit_create_conn_recovery_datain_values(struct iscsi_cmd *, u32);
+extern void iscsit_create_conn_recovery_dataout_values(struct iscsi_cmd *);
+extern struct iscsi_conn_recovery *iscsit_get_inactive_connection_recovery_entry(
+ struct iscsi_session *, u16);
+extern void iscsit_free_connection_recovery_entires(struct iscsi_session *);
+extern int iscsit_remove_active_connection_recovery_entry(
+ struct iscsi_conn_recovery *, struct iscsi_session *);
+extern int iscsit_remove_cmd_from_connection_recovery(struct iscsi_cmd *,
+ struct iscsi_session *);
+extern void iscsit_discard_cr_cmds_by_expstatsn(struct iscsi_conn_recovery *, u32);
+extern int iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(struct iscsi_conn *);
+extern int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *);
+extern int iscsit_connection_recovery_transport_reset(struct iscsi_conn *);
+
+#endif /*** ISCSI_TARGET_ERL2_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.c
new file mode 100644
index 0000000..bc7d08f
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.c
@@ -0,0 +1,1205 @@
+/*******************************************************************************
+ * This file contains the login functions used by the iSCSI Target driver.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/kthread.h>
+#include <linux/crypto.h>
+#include <linux/idr.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_tq.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_nego.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target_login.h"
+#include "iscsi_target_stat.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_parameters.h"
+
+extern struct idr sess_idr;
+extern struct mutex auth_id_lock;
+extern spinlock_t sess_idr_lock;
+
+static int iscsi_login_init_conn(struct iscsi_conn *conn)
+{
+ init_waitqueue_head(&conn->queues_wq);
+ INIT_LIST_HEAD(&conn->conn_list);
+ INIT_LIST_HEAD(&conn->conn_cmd_list);
+ INIT_LIST_HEAD(&conn->immed_queue_list);
+ INIT_LIST_HEAD(&conn->response_queue_list);
+ init_completion(&conn->conn_post_wait_comp);
+ init_completion(&conn->conn_wait_comp);
+ init_completion(&conn->conn_wait_rcfr_comp);
+ init_completion(&conn->conn_waiting_on_uc_comp);
+ init_completion(&conn->conn_logout_comp);
+ init_completion(&conn->rx_half_close_comp);
+ init_completion(&conn->tx_half_close_comp);
+ spin_lock_init(&conn->cmd_lock);
+ spin_lock_init(&conn->conn_usage_lock);
+ spin_lock_init(&conn->immed_queue_lock);
+ spin_lock_init(&conn->nopin_timer_lock);
+ spin_lock_init(&conn->response_queue_lock);
+ spin_lock_init(&conn->state_lock);
+
+ if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
+ pr_err("Unable to allocate conn->conn_cpumask\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/*
+ * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup
+ * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel
+ */
+int iscsi_login_setup_crypto(struct iscsi_conn *conn)
+{
+ /*
+ * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
+ * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
+ * to software 1x8 byte slicing from crc32c.ko
+ */
+ conn->conn_rx_hash.flags = 0;
+ conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
+ CRYPTO_ALG_ASYNC);
+ if (IS_ERR(conn->conn_rx_hash.tfm)) {
+ pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
+ return -ENOMEM;
+ }
+
+ conn->conn_tx_hash.flags = 0;
+ conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
+ CRYPTO_ALG_ASYNC);
+ if (IS_ERR(conn->conn_tx_hash.tfm)) {
+ pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
+ crypto_free_hash(conn->conn_rx_hash.tfm);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int iscsi_login_check_initiator_version(
+ struct iscsi_conn *conn,
+ u8 version_max,
+ u8 version_min)
+{
+ if ((version_max != 0x00) || (version_min != 0x00)) {
+ pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
+ " version Min/Max 0x%02x/0x%02x, rejecting login.\n",
+ version_min, version_max);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_NO_VERSION);
+ return -1;
+ }
+
+ return 0;
+}
+
+int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
+{
+ int sessiontype;
+ struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
+ struct iscsi_portal_group *tpg = conn->tpg;
+ struct iscsi_session *sess = NULL, *sess_p = NULL;
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+ struct se_session *se_sess, *se_sess_tmp;
+
+ initiatorname_param = iscsi_find_param_from_key(
+ INITIATORNAME, conn->param_list);
+ sessiontype_param = iscsi_find_param_from_key(
+ SESSIONTYPE, conn->param_list);
+ if (!initiatorname_param || !sessiontype_param) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ return -1;
+ }
+
+ sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
+
+ spin_lock_bh(&se_tpg->session_lock);
+ list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
+ sess_list) {
+
+ sess_p = se_sess->fabric_sess_ptr;
+ spin_lock(&sess_p->conn_lock);
+ if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
+ atomic_read(&sess_p->session_logout) ||
+ (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
+ spin_unlock(&sess_p->conn_lock);
+ continue;
+ }
+ if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
+ (!strcmp(sess_p->sess_ops->InitiatorName,
+ initiatorname_param->value) &&
+ (sess_p->sess_ops->SessionType == sessiontype))) {
+ atomic_set(&sess_p->session_reinstatement, 1);
+ spin_unlock(&sess_p->conn_lock);
+ iscsit_inc_session_usage_count(sess_p);
+ iscsit_stop_time2retain_timer(sess_p);
+ sess = sess_p;
+ break;
+ }
+ spin_unlock(&sess_p->conn_lock);
+ }
+ spin_unlock_bh(&se_tpg->session_lock);
+ /*
+ * If the Time2Retain handler has expired, the session is already gone.
+ */
+ if (!sess)
+ return 0;
+
+ pr_debug("%s iSCSI Session SID %u is still active for %s,"
+ " preforming session reinstatement.\n", (sessiontype) ?
+ "Discovery" : "Normal", sess->sid,
+ sess->sess_ops->InitiatorName);
+
+ spin_lock_bh(&sess->conn_lock);
+ if (sess->session_state == TARG_SESS_STATE_FAILED) {
+ spin_unlock_bh(&sess->conn_lock);
+ iscsit_dec_session_usage_count(sess);
+ target_put_session(sess->se_sess);
+ return 0;
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ iscsit_stop_session(sess, 1, 1);
+ iscsit_dec_session_usage_count(sess);
+
+ target_put_session(sess->se_sess);
+ return 0;
+}
+
+static void iscsi_login_set_conn_values(
+ struct iscsi_session *sess,
+ struct iscsi_conn *conn,
+ u16 cid)
+{
+ conn->sess = sess;
+ conn->cid = cid;
+ /*
+ * Generate a random Status sequence number (statsn) for the new
+ * iSCSI connection.
+ */
+ get_random_bytes(&conn->stat_sn, sizeof(u32));
+
+ mutex_lock(&auth_id_lock);
+ conn->auth_id = iscsit_global->auth_id++;
+ mutex_unlock(&auth_id_lock);
+}
+
+/*
+ * This is the leading connection of a new session,
+ * or session reinstatement.
+ */
+static int iscsi_login_zero_tsih_s1(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ struct iscsi_session *sess = NULL;
+ struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
+
+ sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
+ if (!sess) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ pr_err("Could not allocate memory for session\n");
+ return -ENOMEM;
+ }
+
+ iscsi_login_set_conn_values(sess, conn, pdu->cid);
+ sess->init_task_tag = pdu->itt;
+ memcpy(&sess->isid, pdu->isid, 6);
+ sess->exp_cmd_sn = pdu->cmdsn;
+ INIT_LIST_HEAD(&sess->sess_conn_list);
+ INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
+ INIT_LIST_HEAD(&sess->cr_active_list);
+ INIT_LIST_HEAD(&sess->cr_inactive_list);
+ init_completion(&sess->async_msg_comp);
+ init_completion(&sess->reinstatement_comp);
+ init_completion(&sess->session_wait_comp);
+ init_completion(&sess->session_waiting_on_uc_comp);
+ mutex_init(&sess->cmdsn_mutex);
+ spin_lock_init(&sess->conn_lock);
+ spin_lock_init(&sess->cr_a_lock);
+ spin_lock_init(&sess->cr_i_lock);
+ spin_lock_init(&sess->session_usage_lock);
+ spin_lock_init(&sess->ttt_lock);
+
+ if (!idr_pre_get(&sess_idr, GFP_KERNEL)) {
+ pr_err("idr_pre_get() for sess_idr failed\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ kfree(sess);
+ return -ENOMEM;
+ }
+ spin_lock(&sess_idr_lock);
+ idr_get_new(&sess_idr, NULL, &sess->session_index);
+ spin_unlock(&sess_idr_lock);
+
+ sess->creation_time = get_jiffies_64();
+ spin_lock_init(&sess->session_stats_lock);
+ /*
+ * The FFP CmdSN window values will be allocated from the TPG's
+ * Initiator Node's ACL once the login has been successfully completed.
+ */
+ sess->max_cmd_sn = pdu->cmdsn;
+
+ sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
+ if (!sess->sess_ops) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_sess_ops.\n");
+ kfree(sess);
+ return -ENOMEM;
+ }
+
+ sess->se_sess = transport_init_session();
+ if (IS_ERR(sess->se_sess)) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ kfree(sess);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int iscsi_login_zero_tsih_s2(
+ struct iscsi_conn *conn)
+{
+ struct iscsi_node_attrib *na;
+ struct iscsi_session *sess = conn->sess;
+ unsigned char buf[32];
+
+ sess->tpg = conn->tpg;
+
+ /*
+ * Assign a new TPG Session Handle. Note this is protected with
+ * struct iscsi_portal_group->np_login_sem from iscsit_access_np().
+ */
+ sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
+ if (!sess->tsih)
+ sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
+
+ /*
+ * Create the default params from user defined values..
+ */
+ if (iscsi_copy_param_list(&conn->param_list,
+ ISCSI_TPG_C(conn)->param_list, 1) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+
+ iscsi_set_keys_to_negotiate(0, conn->param_list);
+
+ if (sess->sess_ops->SessionType)
+ return iscsi_set_keys_irrelevant_for_discovery(
+ conn->param_list);
+
+ na = iscsit_tpg_get_node_attrib(sess);
+
+ /*
+ * Need to send TargetPortalGroupTag back in first login response
+ * on any iSCSI connection where the Initiator provides TargetName.
+ * See 5.3.1. Login Phase Start
+ *
+ * In our case, we have already located the struct iscsi_tiqn at this point.
+ */
+ memset(buf, 0, 32);
+ sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
+ if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+
+ /*
+ * Workaround for Initiators that have broken connection recovery logic.
+ *
+ * "We would really like to get rid of this." Linux-iSCSI.org team
+ */
+ memset(buf, 0, 32);
+ sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl);
+ if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+
+ if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Remove PSTATE_NEGOTIATE for the four FIM related keys.
+ * The Initiator node will be able to enable FIM by proposing them itself.
+ */
+int iscsi_login_disable_FIM_keys(
+ struct iscsi_param_list *param_list,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_param *param;
+
+ param = iscsi_find_param_from_key("OFMarker", param_list);
+ if (!param) {
+ pr_err("iscsi_find_param_from_key() for"
+ " OFMarker failed\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+ param->state &= ~PSTATE_NEGOTIATE;
+
+ param = iscsi_find_param_from_key("OFMarkInt", param_list);
+ if (!param) {
+ pr_err("iscsi_find_param_from_key() for"
+ " IFMarker failed\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+ param->state &= ~PSTATE_NEGOTIATE;
+
+ param = iscsi_find_param_from_key("IFMarker", param_list);
+ if (!param) {
+ pr_err("iscsi_find_param_from_key() for"
+ " IFMarker failed\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+ param->state &= ~PSTATE_NEGOTIATE;
+
+ param = iscsi_find_param_from_key("IFMarkInt", param_list);
+ if (!param) {
+ pr_err("iscsi_find_param_from_key() for"
+ " IFMarker failed\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+ param->state &= ~PSTATE_NEGOTIATE;
+
+ return 0;
+}
+
+static int iscsi_login_non_zero_tsih_s1(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
+
+ iscsi_login_set_conn_values(NULL, conn, pdu->cid);
+ return 0;
+}
+
+/*
+ * Add a new connection to an existing session.
+ */
+static int iscsi_login_non_zero_tsih_s2(
+ struct iscsi_conn *conn,
+ unsigned char *buf)
+{
+ struct iscsi_portal_group *tpg = conn->tpg;
+ struct iscsi_session *sess = NULL, *sess_p = NULL;
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+ struct se_session *se_sess, *se_sess_tmp;
+ struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
+
+ spin_lock_bh(&se_tpg->session_lock);
+ list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
+ sess_list) {
+
+ sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
+ if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
+ atomic_read(&sess_p->session_logout) ||
+ (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
+ continue;
+ if (!memcmp(sess_p->isid, pdu->isid, 6) &&
+ (sess_p->tsih == pdu->tsih)) {
+ iscsit_inc_session_usage_count(sess_p);
+ iscsit_stop_time2retain_timer(sess_p);
+ sess = sess_p;
+ break;
+ }
+ }
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ /*
+ * If the Time2Retain handler has expired, the session is already gone.
+ */
+ if (!sess) {
+ pr_err("Initiator attempting to add a connection to"
+ " a non-existent session, rejecting iSCSI Login.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_NO_SESSION);
+ return -1;
+ }
+
+ /*
+ * Stop the Time2Retain timer if this is a failed session, we restart
+ * the timer if the login is not successful.
+ */
+ spin_lock_bh(&sess->conn_lock);
+ if (sess->session_state == TARG_SESS_STATE_FAILED)
+ atomic_set(&sess->session_continuation, 1);
+ spin_unlock_bh(&sess->conn_lock);
+
+ iscsi_login_set_conn_values(sess, conn, pdu->cid);
+
+ if (iscsi_copy_param_list(&conn->param_list,
+ ISCSI_TPG_C(conn)->param_list, 0) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+
+ iscsi_set_keys_to_negotiate(0, conn->param_list);
+ /*
+ * Need to send TargetPortalGroupTag back in first login response
+ * on any iSCSI connection where the Initiator provides TargetName.
+ * See 5.3.1. Login Phase Start
+ *
+ * In our case, we have already located the struct iscsi_tiqn at this point.
+ */
+ memset(buf, 0, 32);
+ sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
+ if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return -1;
+ }
+
+ return iscsi_login_disable_FIM_keys(conn->param_list, conn);
+}
+
+int iscsi_login_post_auth_non_zero_tsih(
+ struct iscsi_conn *conn,
+ u16 cid,
+ u32 exp_statsn)
+{
+ struct iscsi_conn *conn_ptr = NULL;
+ struct iscsi_conn_recovery *cr = NULL;
+ struct iscsi_session *sess = conn->sess;
+
+ /*
+ * By following item 5 in the login table, if we have found
+ * an existing ISID and a valid/existing TSIH and an existing
+ * CID we do connection reinstatement. Currently we dont not
+ * support it so we send back an non-zero status class to the
+ * initiator and release the new connection.
+ */
+ conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
+ if ((conn_ptr)) {
+ pr_err("Connection exists with CID %hu for %s,"
+ " performing connection reinstatement.\n",
+ conn_ptr->cid, sess->sess_ops->InitiatorName);
+
+ iscsit_connection_reinstatement_rcfr(conn_ptr);
+ iscsit_dec_conn_usage_count(conn_ptr);
+ }
+
+ /*
+ * Check for any connection recovery entires containing CID.
+ * We use the original ExpStatSN sent in the first login request
+ * to acknowledge commands for the failed connection.
+ *
+ * Also note that an explict logout may have already been sent,
+ * but the response may not be sent due to additional connection
+ * loss.
+ */
+ if (sess->sess_ops->ErrorRecoveryLevel == 2) {
+ cr = iscsit_get_inactive_connection_recovery_entry(
+ sess, cid);
+ if ((cr)) {
+ pr_debug("Performing implicit logout"
+ " for connection recovery on CID: %hu\n",
+ conn->cid);
+ iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
+ }
+ }
+
+ /*
+ * Else we follow item 4 from the login table in that we have
+ * found an existing ISID and a valid/existing TSIH and a new
+ * CID we go ahead and continue to add a new connection to the
+ * session.
+ */
+ pr_debug("Adding CID %hu to existing session for %s.\n",
+ cid, sess->sess_ops->InitiatorName);
+
+ if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
+ pr_err("Adding additional connection to this session"
+ " would exceed MaxConnections %d, login failed.\n",
+ sess->sess_ops->MaxConnections);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_ISID_ERROR);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+
+ if (!sess->sess_ops->SessionType)
+ iscsit_start_nopin_timer(conn);
+}
+
+static int iscsi_post_login_handler(
+ struct iscsi_np *np,
+ struct iscsi_conn *conn,
+ u8 zero_tsih)
+{
+ int stop_timer = 0;
+ struct iscsi_session *sess = conn->sess;
+ struct se_session *se_sess = sess->se_sess;
+ struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
+ struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
+ struct iscsi_thread_set *ts;
+
+ iscsit_inc_conn_usage_count(conn);
+
+ iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
+ ISCSI_LOGIN_STATUS_ACCEPT);
+
+ pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
+ conn->conn_state = TARG_CONN_STATE_LOGGED_IN;
+
+ iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
+ iscsit_set_sync_and_steering_values(conn);
+ /*
+ * SCSI Initiator -> SCSI Target Port Mapping
+ */
+ ts = iscsi_get_thread_set();
+ if (!zero_tsih) {
+ iscsi_set_session_parameters(sess->sess_ops,
+ conn->param_list, 0);
+ iscsi_release_param_list(conn->param_list);
+ conn->param_list = NULL;
+
+ spin_lock_bh(&sess->conn_lock);
+ atomic_set(&sess->session_continuation, 0);
+ if (sess->session_state == TARG_SESS_STATE_FAILED) {
+ pr_debug("Moving to"
+ " TARG_SESS_STATE_LOGGED_IN.\n");
+ sess->session_state = TARG_SESS_STATE_LOGGED_IN;
+ stop_timer = 1;
+ }
+
+ pr_debug("iSCSI Login successful on CID: %hu from %s to"
+ " %s:%hu,%hu\n", conn->cid, conn->login_ip,
+ conn->local_ip, conn->local_port, tpg->tpgt);
+
+ list_add_tail(&conn->conn_list, &sess->sess_conn_list);
+ atomic_inc(&sess->nconn);
+ pr_debug("Incremented iSCSI Connection count to %hu"
+ " from node: %s\n", atomic_read(&sess->nconn),
+ sess->sess_ops->InitiatorName);
+ spin_unlock_bh(&sess->conn_lock);
+
+ iscsi_post_login_start_timers(conn);
+ iscsi_activate_thread_set(conn, ts);
+ /*
+ * Determine CPU mask to ensure connection's RX and TX kthreads
+ * are scheduled on the same CPU.
+ */
+ iscsit_thread_get_cpumask(conn);
+ conn->conn_rx_reset_cpumask = 1;
+ conn->conn_tx_reset_cpumask = 1;
+
+ iscsit_dec_conn_usage_count(conn);
+ if (stop_timer) {
+ spin_lock_bh(&se_tpg->session_lock);
+ iscsit_stop_time2retain_timer(sess);
+ spin_unlock_bh(&se_tpg->session_lock);
+ }
+ iscsit_dec_session_usage_count(sess);
+ return 0;
+ }
+
+ iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
+ iscsi_release_param_list(conn->param_list);
+ conn->param_list = NULL;
+
+ iscsit_determine_maxcmdsn(sess);
+
+ spin_lock_bh(&se_tpg->session_lock);
+ __transport_register_session(&sess->tpg->tpg_se_tpg,
+ se_sess->se_node_acl, se_sess, sess);
+ pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
+ sess->session_state = TARG_SESS_STATE_LOGGED_IN;
+
+ pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n",
+ conn->cid, conn->login_ip, conn->local_ip, conn->local_port,
+ tpg->tpgt);
+
+ spin_lock_bh(&sess->conn_lock);
+ list_add_tail(&conn->conn_list, &sess->sess_conn_list);
+ atomic_inc(&sess->nconn);
+ pr_debug("Incremented iSCSI Connection count to %hu from node:"
+ " %s\n", atomic_read(&sess->nconn),
+ sess->sess_ops->InitiatorName);
+ spin_unlock_bh(&sess->conn_lock);
+
+ sess->sid = tpg->sid++;
+ if (!sess->sid)
+ sess->sid = tpg->sid++;
+ pr_debug("Established iSCSI session from node: %s\n",
+ sess->sess_ops->InitiatorName);
+
+ tpg->nsessions++;
+ if (tpg->tpg_tiqn)
+ tpg->tpg_tiqn->tiqn_nsessions++;
+
+ pr_debug("Incremented number of active iSCSI sessions to %u on"
+ " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ iscsi_post_login_start_timers(conn);
+ iscsi_activate_thread_set(conn, ts);
+ /*
+ * Determine CPU mask to ensure connection's RX and TX kthreads
+ * are scheduled on the same CPU.
+ */
+ iscsit_thread_get_cpumask(conn);
+ conn->conn_rx_reset_cpumask = 1;
+ conn->conn_tx_reset_cpumask = 1;
+
+ iscsit_dec_conn_usage_count(conn);
+
+ return 0;
+}
+
+static void iscsi_handle_login_thread_timeout(unsigned long data)
+{
+ struct iscsi_np *np = (struct iscsi_np *) data;
+
+ spin_lock_bh(&np->np_thread_lock);
+ pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
+ np->np_ip, np->np_port);
+
+ if (np->np_login_timer_flags & ISCSI_TF_STOP) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return;
+ }
+
+ if (np->np_thread)
+ send_sig(SIGINT, np->np_thread, 1);
+
+ np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&np->np_thread_lock);
+}
+
+static void iscsi_start_login_thread_timer(struct iscsi_np *np)
+{
+ /*
+ * This used the TA_LOGIN_TIMEOUT constant because at this
+ * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
+ */
+ spin_lock_bh(&np->np_thread_lock);
+ init_timer(&np->np_login_timer);
+ np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
+ np->np_login_timer.data = (unsigned long)np;
+ np->np_login_timer.function = iscsi_handle_login_thread_timeout;
+ np->np_login_timer_flags &= ~ISCSI_TF_STOP;
+ np->np_login_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&np->np_login_timer);
+
+ pr_debug("Added timeout timer to iSCSI login request for"
+ " %u seconds.\n", TA_LOGIN_TIMEOUT);
+ spin_unlock_bh(&np->np_thread_lock);
+}
+
+static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
+{
+ spin_lock_bh(&np->np_thread_lock);
+ if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&np->np_thread_lock);
+ return;
+ }
+ np->np_login_timer_flags |= ISCSI_TF_STOP;
+ spin_unlock_bh(&np->np_thread_lock);
+
+ del_timer_sync(&np->np_login_timer);
+
+ spin_lock_bh(&np->np_thread_lock);
+ np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&np->np_thread_lock);
+}
+
+int iscsi_target_setup_login_socket(
+ struct iscsi_np *np,
+ struct __kernel_sockaddr_storage *sockaddr)
+{
+ struct socket *sock;
+ int backlog = 5, ret, opt = 0, len;
+
+ switch (np->np_network_transport) {
+ case ISCSI_TCP:
+ np->np_ip_proto = IPPROTO_TCP;
+ np->np_sock_type = SOCK_STREAM;
+ break;
+ case ISCSI_SCTP_TCP:
+ np->np_ip_proto = IPPROTO_SCTP;
+ np->np_sock_type = SOCK_STREAM;
+ break;
+ case ISCSI_SCTP_UDP:
+ np->np_ip_proto = IPPROTO_SCTP;
+ np->np_sock_type = SOCK_SEQPACKET;
+ break;
+ case ISCSI_IWARP_TCP:
+ case ISCSI_IWARP_SCTP:
+ case ISCSI_INFINIBAND:
+ default:
+ pr_err("Unsupported network_transport: %d\n",
+ np->np_network_transport);
+ return -EINVAL;
+ }
+
+ ret = sock_create(sockaddr->ss_family, np->np_sock_type,
+ np->np_ip_proto, &sock);
+ if (ret < 0) {
+ pr_err("sock_create() failed.\n");
+ return ret;
+ }
+ np->np_socket = sock;
+ /*
+ * Setup the np->np_sockaddr from the passed sockaddr setup
+ * in iscsi_target_configfs.c code..
+ */
+ memcpy(&np->np_sockaddr, sockaddr,
+ sizeof(struct __kernel_sockaddr_storage));
+
+ if (sockaddr->ss_family == AF_INET6)
+ len = sizeof(struct sockaddr_in6);
+ else
+ len = sizeof(struct sockaddr_in);
+ /*
+ * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
+ */
+ /* FIXME: Someone please explain why this is endian-safe */
+ opt = 1;
+ if (np->np_network_transport == ISCSI_TCP) {
+ ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
+ (char *)&opt, sizeof(opt));
+ if (ret < 0) {
+ pr_err("kernel_setsockopt() for TCP_NODELAY"
+ " failed: %d\n", ret);
+ goto fail;
+ }
+ }
+
+ /* FIXME: Someone please explain why this is endian-safe */
+ ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ (char *)&opt, sizeof(opt));
+ if (ret < 0) {
+ pr_err("kernel_setsockopt() for SO_REUSEADDR"
+ " failed\n");
+ goto fail;
+ }
+
+ ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
+ (char *)&opt, sizeof(opt));
+ if (ret < 0) {
+ pr_err("kernel_setsockopt() for IP_FREEBIND"
+ " failed\n");
+ goto fail;
+ }
+
+ ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
+ if (ret < 0) {
+ pr_err("kernel_bind() failed: %d\n", ret);
+ goto fail;
+ }
+
+ ret = kernel_listen(sock, backlog);
+ if (ret != 0) {
+ pr_err("kernel_listen() failed: %d\n", ret);
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ np->np_socket = NULL;
+ if (sock)
+ sock_release(sock);
+ return ret;
+}
+
+static int __iscsi_target_login_thread(struct iscsi_np *np)
+{
+ u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0;
+ int err, ret = 0, stop;
+ struct iscsi_conn *conn = NULL;
+ struct iscsi_login *login;
+ struct iscsi_portal_group *tpg = NULL;
+ struct socket *new_sock, *sock;
+ struct kvec iov;
+ struct iscsi_login_req *pdu;
+ struct sockaddr_in sock_in;
+ struct sockaddr_in6 sock_in6;
+
+ flush_signals(current);
+ sock = np->np_socket;
+
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
+ np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
+ complete(&np->np_restart_comp);
+ } else {
+ np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+
+ if (kernel_accept(sock, &new_sock, 0) < 0) {
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
+ spin_unlock_bh(&np->np_thread_lock);
+ complete(&np->np_restart_comp);
+ /* Get another socket */
+ return 1;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+ goto out;
+ }
+ iscsi_start_login_thread_timer(np);
+
+ conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
+ if (!conn) {
+ pr_err("Could not allocate memory for"
+ " new connection\n");
+ sock_release(new_sock);
+ /* Get another socket */
+ return 1;
+ }
+
+ pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
+ conn->conn_state = TARG_CONN_STATE_FREE;
+ conn->sock = new_sock;
+
+ pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
+ conn->conn_state = TARG_CONN_STATE_XPT_UP;
+
+ /*
+ * Allocate conn->conn_ops early as a failure calling
+ * iscsit_tx_login_rsp() below will call tx_data().
+ */
+ conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
+ if (!conn->conn_ops) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_conn_ops.\n");
+ goto new_sess_out;
+ }
+ /*
+ * Perform the remaining iSCSI connection initialization items..
+ */
+ if (iscsi_login_init_conn(conn) < 0)
+ goto new_sess_out;
+
+ memset(buffer, 0, ISCSI_HDR_LEN);
+ memset(&iov, 0, sizeof(struct kvec));
+ iov.iov_base = buffer;
+ iov.iov_len = ISCSI_HDR_LEN;
+
+ if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) {
+ pr_err("rx_data() returned an error.\n");
+ goto new_sess_out;
+ }
+
+ iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK);
+ if (!(iscsi_opcode & ISCSI_OP_LOGIN)) {
+ pr_err("First opcode is not login request,"
+ " failing login request.\n");
+ goto new_sess_out;
+ }
+
+ pdu = (struct iscsi_login_req *) buffer;
+ pdu->cid = be16_to_cpu(pdu->cid);
+ pdu->tsih = be16_to_cpu(pdu->tsih);
+ pdu->itt = be32_to_cpu(pdu->itt);
+ pdu->cmdsn = be32_to_cpu(pdu->cmdsn);
+ pdu->exp_statsn = be32_to_cpu(pdu->exp_statsn);
+ /*
+ * Used by iscsit_tx_login_rsp() for Login Resonses PDUs
+ * when Status-Class != 0.
+ */
+ conn->login_itt = pdu->itt;
+
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
+ spin_unlock_bh(&np->np_thread_lock);
+ pr_err("iSCSI Network Portal on %s:%hu currently not"
+ " active.\n", np->np_ip, np->np_port);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
+ goto new_sess_out;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+
+ if (np->np_sockaddr.ss_family == AF_INET6) {
+ memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
+
+ if (conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in6, &err, 1) < 0) {
+ pr_err("sock_ops->getname() failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ goto new_sess_out;
+ }
+ snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
+ &sock_in6.sin6_addr.in6_u);
+ conn->login_port = ntohs(sock_in6.sin6_port);
+
+ if (conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in6, &err, 0) < 0) {
+ pr_err("sock_ops->getname() failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ goto new_sess_out;
+ }
+ snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
+ &sock_in6.sin6_addr.in6_u);
+ conn->local_port = ntohs(sock_in6.sin6_port);
+
+ } else {
+ memset(&sock_in, 0, sizeof(struct sockaddr_in));
+
+ if (conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in, &err, 1) < 0) {
+ pr_err("sock_ops->getname() failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ goto new_sess_out;
+ }
+ sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr);
+ conn->login_port = ntohs(sock_in.sin_port);
+
+ if (conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in, &err, 0) < 0) {
+ pr_err("sock_ops->getname() failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ goto new_sess_out;
+ }
+ sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr);
+ conn->local_port = ntohs(sock_in.sin_port);
+ }
+
+ conn->network_transport = np->np_network_transport;
+
+ pr_debug("Received iSCSI login request from %s on %s Network"
+ " Portal %s:%hu\n", conn->login_ip,
+ (conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP",
+ conn->local_ip, conn->local_port);
+
+ pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
+ conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
+
+ if (iscsi_login_check_initiator_version(conn, pdu->max_version,
+ pdu->min_version) < 0)
+ goto new_sess_out;
+
+ zero_tsih = (pdu->tsih == 0x0000);
+ if ((zero_tsih)) {
+ /*
+ * This is the leading connection of a new session.
+ * We wait until after authentication to check for
+ * session reinstatement.
+ */
+ if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
+ goto new_sess_out;
+ } else {
+ /*
+ * Add a new connection to an existing session.
+ * We check for a non-existant session in
+ * iscsi_login_non_zero_tsih_s2() below based
+ * on ISID/TSIH, but wait until after authentication
+ * to check for connection reinstatement, etc.
+ */
+ if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
+ goto new_sess_out;
+ }
+
+ /*
+ * This will process the first login request, and call
+ * iscsi_target_locate_portal(), and return a valid struct iscsi_login.
+ */
+ login = iscsi_target_init_negotiation(np, conn, buffer);
+ if (!login) {
+ tpg = conn->tpg;
+ goto new_sess_out;
+ }
+
+ tpg = conn->tpg;
+ if (!tpg) {
+ pr_err("Unable to locate struct iscsi_conn->tpg\n");
+ goto new_sess_out;
+ }
+
+ if (zero_tsih) {
+ if (iscsi_login_zero_tsih_s2(conn) < 0) {
+ iscsi_target_nego_release(login, conn);
+ goto new_sess_out;
+ }
+ } else {
+ if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) {
+ iscsi_target_nego_release(login, conn);
+ goto old_sess_out;
+ }
+ }
+
+ if (iscsi_target_start_negotiation(login, conn) < 0)
+ goto new_sess_out;
+
+ if (!conn->sess) {
+ pr_err("struct iscsi_conn session pointer is NULL!\n");
+ goto new_sess_out;
+ }
+
+ iscsi_stop_login_thread_timer(np);
+
+ if (signal_pending(current))
+ goto new_sess_out;
+
+ ret = iscsi_post_login_handler(np, conn, zero_tsih);
+
+ if (ret < 0)
+ goto new_sess_out;
+
+ iscsit_deaccess_np(np, tpg);
+ tpg = NULL;
+ /* Get another socket */
+ return 1;
+
+new_sess_out:
+ pr_err("iSCSI Login negotiation failed.\n");
+ iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ if (!zero_tsih || !conn->sess)
+ goto old_sess_out;
+ if (conn->sess->se_sess)
+ transport_free_session(conn->sess->se_sess);
+ if (conn->sess->session_index != 0) {
+ spin_lock_bh(&sess_idr_lock);
+ idr_remove(&sess_idr, conn->sess->session_index);
+ spin_unlock_bh(&sess_idr_lock);
+ }
+ if (conn->sess->sess_ops)
+ kfree(conn->sess->sess_ops);
+ if (conn->sess)
+ kfree(conn->sess);
+old_sess_out:
+ iscsi_stop_login_thread_timer(np);
+ /*
+ * If login negotiation fails check if the Time2Retain timer
+ * needs to be restarted.
+ */
+ if (!zero_tsih && conn->sess) {
+ spin_lock_bh(&conn->sess->conn_lock);
+ if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
+ struct se_portal_group *se_tpg =
+ &ISCSI_TPG_C(conn)->tpg_se_tpg;
+
+ atomic_set(&conn->sess->session_continuation, 0);
+ spin_unlock_bh(&conn->sess->conn_lock);
+ spin_lock_bh(&se_tpg->session_lock);
+ iscsit_start_time2retain_handler(conn->sess);
+ spin_unlock_bh(&se_tpg->session_lock);
+ } else
+ spin_unlock_bh(&conn->sess->conn_lock);
+ iscsit_dec_session_usage_count(conn->sess);
+ }
+
+ if (!IS_ERR(conn->conn_rx_hash.tfm))
+ crypto_free_hash(conn->conn_rx_hash.tfm);
+ if (!IS_ERR(conn->conn_tx_hash.tfm))
+ crypto_free_hash(conn->conn_tx_hash.tfm);
+
+ if (conn->conn_cpumask)
+ free_cpumask_var(conn->conn_cpumask);
+
+ kfree(conn->conn_ops);
+
+ if (conn->param_list) {
+ iscsi_release_param_list(conn->param_list);
+ conn->param_list = NULL;
+ }
+ if (conn->sock)
+ sock_release(conn->sock);
+ kfree(conn);
+
+ if (tpg) {
+ iscsit_deaccess_np(np, tpg);
+ tpg = NULL;
+ }
+
+out:
+ stop = kthread_should_stop();
+ if (!stop && signal_pending(current)) {
+ spin_lock_bh(&np->np_thread_lock);
+ stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN);
+ spin_unlock_bh(&np->np_thread_lock);
+ }
+ /* Wait for another socket.. */
+ if (!stop)
+ return 1;
+
+ iscsi_stop_login_thread_timer(np);
+ spin_lock_bh(&np->np_thread_lock);
+ np->np_thread_state = ISCSI_NP_THREAD_EXIT;
+ spin_unlock_bh(&np->np_thread_lock);
+ return 0;
+}
+
+int iscsi_target_login_thread(void *arg)
+{
+ struct iscsi_np *np = arg;
+ int ret;
+
+ allow_signal(SIGINT);
+
+ while (!kthread_should_stop()) {
+ ret = __iscsi_target_login_thread(np);
+ /*
+ * We break and exit here unless another sock_accept() call
+ * is expected.
+ */
+ if (ret != 1)
+ break;
+ }
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.h
new file mode 100644
index 0000000..091dcae
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_login.h
@@ -0,0 +1,12 @@
+#ifndef ISCSI_TARGET_LOGIN_H
+#define ISCSI_TARGET_LOGIN_H
+
+extern int iscsi_login_setup_crypto(struct iscsi_conn *);
+extern int iscsi_check_for_session_reinstatement(struct iscsi_conn *);
+extern int iscsi_login_post_auth_non_zero_tsih(struct iscsi_conn *, u16, u32);
+extern int iscsi_target_setup_login_socket(struct iscsi_np *,
+ struct __kernel_sockaddr_storage *);
+extern int iscsi_target_login_thread(void *);
+extern int iscsi_login_disable_FIM_keys(struct iscsi_param_list *, struct iscsi_conn *);
+
+#endif /*** ISCSI_TARGET_LOGIN_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.c
new file mode 100644
index 0000000..89f8909
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.c
@@ -0,0 +1,1066 @@
+/*******************************************************************************
+ * This file contains main functions related to iSCSI Parameter negotiation.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/ctype.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_login.h"
+#include "iscsi_target_nego.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_auth.h"
+
+#define MAX_LOGIN_PDUS 7
+#define TEXT_LEN 4096
+
+void convert_null_to_semi(char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (buf[i] == '\0')
+ buf[i] = ';';
+}
+
+int strlen_semi(char *buf)
+{
+ int i = 0;
+
+ while (buf[i] != '\0') {
+ if (buf[i] == ';')
+ return i;
+ i++;
+ }
+
+ return -1;
+}
+
+int extract_param(
+ const char *in_buf,
+ const char *pattern,
+ unsigned int max_length,
+ char *out_buf,
+ unsigned char *type)
+{
+ char *ptr;
+ int len;
+
+ if (!in_buf || !pattern || !out_buf || !type)
+ return -1;
+
+ ptr = strstr(in_buf, pattern);
+ if (!ptr)
+ return -1;
+
+ ptr = strstr(ptr, "=");
+ if (!ptr)
+ return -1;
+
+ ptr += 1;
+ if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) {
+ ptr += 2; /* skip 0x */
+ *type = HEX;
+ } else
+ *type = DECIMAL;
+
+ len = strlen_semi(ptr);
+ if (len < 0)
+ return -1;
+
+ if (len >= max_length) {
+ pr_err("Length of input: %d exceeds max_length:"
+ " %d\n", len, max_length);
+ return -1;
+ }
+ memcpy(out_buf, ptr, len);
+ out_buf[len] = '\0';
+
+ return 0;
+}
+
+static u32 iscsi_handle_authentication(
+ struct iscsi_conn *conn,
+ char *in_buf,
+ char *out_buf,
+ int in_length,
+ int *out_length,
+ unsigned char *authtype)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_auth *auth;
+ struct iscsi_node_acl *iscsi_nacl;
+ struct se_node_acl *se_nacl;
+
+ if (!sess->sess_ops->SessionType) {
+ /*
+ * For SessionType=Normal
+ */
+ se_nacl = conn->sess->se_sess->se_node_acl;
+ if (!se_nacl) {
+ pr_err("Unable to locate struct se_node_acl for"
+ " CHAP auth\n");
+ return -1;
+ }
+ iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl,
+ se_node_acl);
+ if (!iscsi_nacl) {
+ pr_err("Unable to locate struct iscsi_node_acl for"
+ " CHAP auth\n");
+ return -1;
+ }
+
+ auth = ISCSI_NODE_AUTH(iscsi_nacl);
+ } else {
+ /*
+ * For SessionType=Discovery
+ */
+ auth = &iscsit_global->discovery_acl.node_auth;
+ }
+
+ if (strstr("CHAP", authtype))
+ strcpy(conn->sess->auth_type, "CHAP");
+ else
+ strcpy(conn->sess->auth_type, NONE);
+
+ if (strstr("None", authtype))
+ return 1;
+#ifdef CANSRP
+ else if (strstr("SRP", authtype))
+ return srp_main_loop(conn, auth, in_buf, out_buf,
+ &in_length, out_length);
+#endif
+ else if (strstr("CHAP", authtype))
+ return chap_main_loop(conn, auth, in_buf, out_buf,
+ &in_length, out_length);
+ else if (strstr("SPKM1", authtype))
+ return 2;
+ else if (strstr("SPKM2", authtype))
+ return 2;
+ else if (strstr("KRB5", authtype))
+ return 2;
+ else
+ return 2;
+}
+
+static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn)
+{
+ kfree(conn->auth_protocol);
+}
+
+static int iscsi_target_check_login_request(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ int req_csg, req_nsg;
+ u32 payload_length;
+ struct iscsi_login_req *login_req;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ payload_length = ntoh24(login_req->dlength);
+
+ switch (login_req->opcode & ISCSI_OPCODE_MASK) {
+ case ISCSI_OP_LOGIN:
+ break;
+ default:
+ pr_err("Received unknown opcode 0x%02x.\n",
+ login_req->opcode & ISCSI_OPCODE_MASK);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if ((login_req->flags & ISCSI_FLAG_LOGIN_CONTINUE) &&
+ (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
+ pr_err("Login request has both ISCSI_FLAG_LOGIN_CONTINUE"
+ " and ISCSI_FLAG_LOGIN_TRANSIT set, protocol error.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ req_csg = (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
+ req_nsg = (login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK);
+
+ if (req_csg != login->current_stage) {
+ pr_err("Initiator unexpectedly changed login stage"
+ " from %d to %d, login failed.\n", login->current_stage,
+ req_csg);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if ((req_nsg == 2) || (req_csg >= 2) ||
+ ((login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT) &&
+ (req_nsg <= req_csg))) {
+ pr_err("Illegal login_req->flags Combination, CSG: %d,"
+ " NSG: %d, ISCSI_FLAG_LOGIN_TRANSIT: %d.\n", req_csg,
+ req_nsg, (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT));
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if ((login_req->max_version != login->version_max) ||
+ (login_req->min_version != login->version_min)) {
+ pr_err("Login request changed Version Max/Nin"
+ " unexpectedly to 0x%02x/0x%02x, protocol error\n",
+ login_req->max_version, login_req->min_version);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if (memcmp(login_req->isid, login->isid, 6) != 0) {
+ pr_err("Login request changed ISID unexpectedly,"
+ " protocol error.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if (login_req->itt != login->init_task_tag) {
+ pr_err("Login request changed ITT unexpectedly to"
+ " 0x%08x, protocol error.\n", login_req->itt);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if (payload_length > MAX_KEY_VALUE_PAIRS) {
+ pr_err("Login request payload exceeds default"
+ " MaxRecvDataSegmentLength: %u, protocol error.\n",
+ MAX_KEY_VALUE_PAIRS);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iscsi_target_check_first_request(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ struct iscsi_param *param = NULL;
+ struct se_node_acl *se_nacl;
+
+ login->first_request = 0;
+
+ list_for_each_entry(param, &conn->param_list->param_list, p_list) {
+ if (!strncmp(param->name, SESSIONTYPE, 11)) {
+ if (!IS_PSTATE_ACCEPTOR(param)) {
+ pr_err("SessionType key not received"
+ " in first login request.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ return -1;
+ }
+ if (!strncmp(param->value, DISCOVERY, 9))
+ return 0;
+ }
+
+ if (!strncmp(param->name, INITIATORNAME, 13)) {
+ if (!IS_PSTATE_ACCEPTOR(param)) {
+ if (!login->leading_connection)
+ continue;
+
+ pr_err("InitiatorName key not received"
+ " in first login request.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ return -1;
+ }
+
+ /*
+ * For non-leading connections, double check that the
+ * received InitiatorName matches the existing session's
+ * struct iscsi_node_acl.
+ */
+ if (!login->leading_connection) {
+ se_nacl = conn->sess->se_sess->se_node_acl;
+ if (!se_nacl) {
+ pr_err("Unable to locate"
+ " struct se_node_acl\n");
+ iscsit_tx_login_rsp(conn,
+ ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
+ return -1;
+ }
+
+ if (strcmp(param->value,
+ se_nacl->initiatorname)) {
+ pr_err("Incorrect"
+ " InitiatorName: %s for this"
+ " iSCSI Initiator Node.\n",
+ param->value);
+ iscsit_tx_login_rsp(conn,
+ ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
+ return -1;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ u32 padding = 0;
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_login_rsp *login_rsp;
+
+ login_rsp = (struct iscsi_login_rsp *) login->rsp;
+
+ login_rsp->opcode = ISCSI_OP_LOGIN_RSP;
+ hton24(login_rsp->dlength, login->rsp_length);
+ memcpy(login_rsp->isid, login->isid, 6);
+ login_rsp->tsih = cpu_to_be16(login->tsih);
+ login_rsp->itt = cpu_to_be32(login->init_task_tag);
+ login_rsp->statsn = cpu_to_be32(conn->stat_sn++);
+ login_rsp->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
+ login_rsp->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
+
+ pr_debug("Sending Login Response, Flags: 0x%02x, ITT: 0x%08x,"
+ " ExpCmdSN; 0x%08x, MaxCmdSN: 0x%08x, StatSN: 0x%08x, Length:"
+ " %u\n", login_rsp->flags, ntohl(login_rsp->itt),
+ ntohl(login_rsp->exp_cmdsn), ntohl(login_rsp->max_cmdsn),
+ ntohl(login_rsp->statsn), login->rsp_length);
+
+ padding = ((-login->rsp_length) & 3);
+
+ if (iscsi_login_tx_data(
+ conn,
+ login->rsp,
+ login->rsp_buf,
+ login->rsp_length + padding) < 0)
+ return -1;
+
+ login->rsp_length = 0;
+ login_rsp->tsih = be16_to_cpu(login_rsp->tsih);
+ login_rsp->itt = be32_to_cpu(login_rsp->itt);
+ login_rsp->statsn = be32_to_cpu(login_rsp->statsn);
+ mutex_lock(&sess->cmdsn_mutex);
+ login_rsp->exp_cmdsn = be32_to_cpu(sess->exp_cmd_sn);
+ login_rsp->max_cmdsn = be32_to_cpu(sess->max_cmd_sn);
+ mutex_unlock(&sess->cmdsn_mutex);
+
+ return 0;
+}
+
+static int iscsi_target_do_rx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ u32 padding = 0, payload_length;
+ struct iscsi_login_req *login_req;
+
+ if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
+ return -1;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ payload_length = ntoh24(login_req->dlength);
+ login_req->tsih = be16_to_cpu(login_req->tsih);
+ login_req->itt = be32_to_cpu(login_req->itt);
+ login_req->cid = be16_to_cpu(login_req->cid);
+ login_req->cmdsn = be32_to_cpu(login_req->cmdsn);
+ login_req->exp_statsn = be32_to_cpu(login_req->exp_statsn);
+
+ pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
+ " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
+ login_req->flags, login_req->itt, login_req->cmdsn,
+ login_req->exp_statsn, login_req->cid, payload_length);
+
+ if (iscsi_target_check_login_request(conn, login) < 0)
+ return -1;
+
+ padding = ((-payload_length) & 3);
+ memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
+
+ if (iscsi_login_rx_data(
+ conn,
+ login->req_buf,
+ payload_length + padding) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int iscsi_target_do_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ if (iscsi_target_do_tx_login_io(conn, login) < 0)
+ return -1;
+
+ if (iscsi_target_do_rx_login_io(conn, login) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int iscsi_target_get_initial_payload(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ u32 padding = 0, payload_length;
+ struct iscsi_login_req *login_req;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ payload_length = ntoh24(login_req->dlength);
+
+ pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
+ " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
+ login_req->flags, login_req->itt, login_req->cmdsn,
+ login_req->exp_statsn, payload_length);
+
+ if (iscsi_target_check_login_request(conn, login) < 0)
+ return -1;
+
+ padding = ((-payload_length) & 3);
+
+ if (iscsi_login_rx_data(
+ conn,
+ login->req_buf,
+ payload_length + padding) < 0)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * NOTE: We check for existing sessions or connections AFTER the initiator
+ * has been successfully authenticated in order to protect against faked
+ * ISID/TSIH combinations.
+ */
+static int iscsi_target_check_for_existing_instances(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ if (login->checked_for_existing)
+ return 0;
+
+ login->checked_for_existing = 1;
+
+ if (!login->tsih)
+ return iscsi_check_for_session_reinstatement(conn);
+ else
+ return iscsi_login_post_auth_non_zero_tsih(conn, login->cid,
+ login->initial_exp_statsn);
+}
+
+static int iscsi_target_do_authentication(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ int authret;
+ u32 payload_length;
+ struct iscsi_param *param;
+ struct iscsi_login_req *login_req;
+ struct iscsi_login_rsp *login_rsp;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ login_rsp = (struct iscsi_login_rsp *) login->rsp;
+ payload_length = ntoh24(login_req->dlength);
+
+ param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
+ if (!param)
+ return -1;
+
+ authret = iscsi_handle_authentication(
+ conn,
+ login->req_buf,
+ login->rsp_buf,
+ payload_length,
+ &login->rsp_length,
+ param->value);
+ switch (authret) {
+ case 0:
+ pr_debug("Received OK response"
+ " from LIO Authentication, continuing.\n");
+ break;
+ case 1:
+ pr_debug("iSCSI security negotiation"
+ " completed successfully.\n");
+ login->auth_complete = 1;
+ if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
+ (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
+ login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
+ ISCSI_FLAG_LOGIN_TRANSIT);
+ login->current_stage = 1;
+ }
+ return iscsi_target_check_for_existing_instances(
+ conn, login);
+ case 2:
+ pr_err("Security negotiation"
+ " failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_AUTH_FAILED);
+ return -1;
+ default:
+ pr_err("Received unknown error %d from LIO"
+ " Authentication\n", authret);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iscsi_target_handle_csg_zero(
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ int ret;
+ u32 payload_length;
+ struct iscsi_param *param;
+ struct iscsi_login_req *login_req;
+ struct iscsi_login_rsp *login_rsp;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ login_rsp = (struct iscsi_login_rsp *) login->rsp;
+ payload_length = ntoh24(login_req->dlength);
+
+ param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
+ if (!param)
+ return -1;
+
+ ret = iscsi_decode_text_input(
+ PHASE_SECURITY|PHASE_DECLARATIVE,
+ SENDER_INITIATOR|SENDER_RECEIVER,
+ login->req_buf,
+ payload_length,
+ conn->param_list);
+ if (ret < 0)
+ return -1;
+
+ if (ret > 0) {
+ if (login->auth_complete) {
+ pr_err("Initiator has already been"
+ " successfully authenticated, but is still"
+ " sending %s keys.\n", param->value);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ goto do_auth;
+ }
+
+ if (login->first_request)
+ if (iscsi_target_check_first_request(conn, login) < 0)
+ return -1;
+
+ ret = iscsi_encode_text_output(
+ PHASE_SECURITY|PHASE_DECLARATIVE,
+ SENDER_TARGET,
+ login->rsp_buf,
+ &login->rsp_length,
+ conn->param_list);
+ if (ret < 0)
+ return -1;
+
+ if (!iscsi_check_negotiated_keys(conn->param_list)) {
+ if (ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication &&
+ !strncmp(param->value, NONE, 4)) {
+ pr_err("Initiator sent AuthMethod=None but"
+ " Target is enforcing iSCSI Authentication,"
+ " login failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_AUTH_FAILED);
+ return -1;
+ }
+
+ if (ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication &&
+ !login->auth_complete)
+ return 0;
+
+ if (strncmp(param->value, NONE, 4) && !login->auth_complete)
+ return 0;
+
+ if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
+ (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
+ login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
+ ISCSI_FLAG_LOGIN_TRANSIT;
+ login->current_stage = 1;
+ }
+ }
+
+ return 0;
+do_auth:
+ return iscsi_target_do_authentication(conn, login);
+}
+
+static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ int ret;
+ u32 payload_length;
+ struct iscsi_login_req *login_req;
+ struct iscsi_login_rsp *login_rsp;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ login_rsp = (struct iscsi_login_rsp *) login->rsp;
+ payload_length = ntoh24(login_req->dlength);
+
+ ret = iscsi_decode_text_input(
+ PHASE_OPERATIONAL|PHASE_DECLARATIVE,
+ SENDER_INITIATOR|SENDER_RECEIVER,
+ login->req_buf,
+ payload_length,
+ conn->param_list);
+ if (ret < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if (login->first_request)
+ if (iscsi_target_check_first_request(conn, login) < 0)
+ return -1;
+
+ if (iscsi_target_check_for_existing_instances(conn, login) < 0)
+ return -1;
+
+ ret = iscsi_encode_text_output(
+ PHASE_OPERATIONAL|PHASE_DECLARATIVE,
+ SENDER_TARGET,
+ login->rsp_buf,
+ &login->rsp_length,
+ conn->param_list);
+ if (ret < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_INIT_ERR);
+ return -1;
+ }
+
+ if (!login->auth_complete &&
+ ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication) {
+ pr_err("Initiator is requesting CSG: 1, has not been"
+ " successfully authenticated, and the Target is"
+ " enforcing iSCSI Authentication, login failed.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_AUTH_FAILED);
+ return -1;
+ }
+
+ if (!iscsi_check_negotiated_keys(conn->param_list))
+ if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) &&
+ (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT))
+ login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 |
+ ISCSI_FLAG_LOGIN_TRANSIT;
+
+ return 0;
+}
+
+static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ int pdu_count = 0;
+ struct iscsi_login_req *login_req;
+ struct iscsi_login_rsp *login_rsp;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ login_rsp = (struct iscsi_login_rsp *) login->rsp;
+
+ while (1) {
+ if (++pdu_count > MAX_LOGIN_PDUS) {
+ pr_err("MAX_LOGIN_PDUS count reached.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_TARGET_ERROR);
+ return -1;
+ }
+
+ switch ((login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) {
+ case 0:
+ login_rsp->flags |= (0 & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK);
+ if (iscsi_target_handle_csg_zero(conn, login) < 0)
+ return -1;
+ break;
+ case 1:
+ login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1;
+ if (iscsi_target_handle_csg_one(conn, login) < 0)
+ return -1;
+ if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
+ login->tsih = conn->sess->tsih;
+ if (iscsi_target_do_tx_login_io(conn,
+ login) < 0)
+ return -1;
+ return 0;
+ }
+ break;
+ default:
+ pr_err("Illegal CSG: %d received from"
+ " Initiator, protocol error.\n",
+ (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK)
+ >> 2);
+ break;
+ }
+
+ if (iscsi_target_do_login_io(conn, login) < 0)
+ return -1;
+
+ if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
+ login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT;
+ login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK;
+ }
+ }
+
+ return 0;
+}
+
+static void iscsi_initiatorname_tolower(
+ char *param_buf)
+{
+ char *c;
+ u32 iqn_size = strlen(param_buf), i;
+
+ for (i = 0; i < iqn_size; i++) {
+ c = ¶m_buf[i];
+ if (!isupper(*c))
+ continue;
+
+ *c = tolower(*c);
+ }
+}
+
+/*
+ * Processes the first Login Request..
+ */
+static int iscsi_target_locate_portal(
+ struct iscsi_np *np,
+ struct iscsi_conn *conn,
+ struct iscsi_login *login)
+{
+ char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL;
+ char *tmpbuf, *start = NULL, *end = NULL, *key, *value;
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_tiqn *tiqn;
+ struct iscsi_login_req *login_req;
+ u32 payload_length;
+ int sessiontype = 0, ret = 0;
+
+ login_req = (struct iscsi_login_req *) login->req;
+ payload_length = ntoh24(login_req->dlength);
+
+ login->first_request = 1;
+ login->leading_connection = (!login_req->tsih) ? 1 : 0;
+ login->current_stage =
+ (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
+ login->version_min = login_req->min_version;
+ login->version_max = login_req->max_version;
+ memcpy(login->isid, login_req->isid, 6);
+ login->cmd_sn = login_req->cmdsn;
+ login->init_task_tag = login_req->itt;
+ login->initial_exp_statsn = login_req->exp_statsn;
+ login->cid = login_req->cid;
+ login->tsih = login_req->tsih;
+
+ if (iscsi_target_get_initial_payload(conn, login) < 0)
+ return -1;
+
+ tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL);
+ if (!tmpbuf) {
+ pr_err("Unable to allocate memory for tmpbuf.\n");
+ return -1;
+ }
+
+ memcpy(tmpbuf, login->req_buf, payload_length);
+ tmpbuf[payload_length] = '\0';
+ start = tmpbuf;
+ end = (start + payload_length);
+
+ /*
+ * Locate the initial keys expected from the Initiator node in
+ * the first login request in order to progress with the login phase.
+ */
+ while (start < end) {
+ if (iscsi_extract_key_value(start, &key, &value) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ if (!strncmp(key, "InitiatorName", 13))
+ i_buf = value;
+ else if (!strncmp(key, "SessionType", 11))
+ s_buf = value;
+ else if (!strncmp(key, "TargetName", 10))
+ t_buf = value;
+
+ start += strlen(key) + strlen(value) + 2;
+ }
+
+ /*
+ * See 5.3. Login Phase.
+ */
+ if (!i_buf) {
+ pr_err("InitiatorName key not received"
+ " in first login request.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ ret = -1;
+ goto out;
+ }
+ /*
+ * Convert the incoming InitiatorName to lowercase following
+ * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs
+ * are NOT case sensitive.
+ */
+ iscsi_initiatorname_tolower(i_buf);
+
+ if (!s_buf) {
+ if (!login->leading_connection)
+ goto get_target;
+
+ pr_err("SessionType key not received"
+ " in first login request.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ ret = -1;
+ goto out;
+ }
+
+ /*
+ * Use default portal group for discovery sessions.
+ */
+ sessiontype = strncmp(s_buf, DISCOVERY, 9);
+ if (!sessiontype) {
+ conn->tpg = iscsit_global->discovery_tpg;
+ if (!login->leading_connection)
+ goto get_target;
+
+ sess->sess_ops->SessionType = 1;
+ /*
+ * Setup crc32c modules from libcrypto
+ */
+ if (iscsi_login_setup_crypto(conn) < 0) {
+ pr_err("iscsi_login_setup_crypto() failed\n");
+ ret = -1;
+ goto out;
+ }
+ /*
+ * Serialize access across the discovery struct iscsi_portal_group to
+ * process login attempt.
+ */
+ if (iscsit_access_np(np, conn->tpg) < 0) {
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
+ ret = -1;
+ goto out;
+ }
+ ret = 0;
+ goto out;
+ }
+
+get_target:
+ if (!t_buf) {
+ pr_err("TargetName key not received"
+ " in first login request while"
+ " SessionType=Normal.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_MISSING_FIELDS);
+ ret = -1;
+ goto out;
+ }
+
+ /*
+ * Locate Target IQN from Storage Node.
+ */
+ tiqn = iscsit_get_tiqn_for_login(t_buf);
+ if (!tiqn) {
+ pr_err("Unable to locate Target IQN: %s in"
+ " Storage Node\n", t_buf);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
+ ret = -1;
+ goto out;
+ }
+ pr_debug("Located Storage Object: %s\n", tiqn->tiqn);
+
+ /*
+ * Locate Target Portal Group from Storage Node.
+ */
+ conn->tpg = iscsit_get_tpg_from_np(tiqn, np);
+ if (!conn->tpg) {
+ pr_err("Unable to locate Target Portal Group"
+ " on %s\n", tiqn->tiqn);
+ iscsit_put_tiqn_for_login(tiqn);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
+ ret = -1;
+ goto out;
+ }
+ pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt);
+ /*
+ * Setup crc32c modules from libcrypto
+ */
+ if (iscsi_login_setup_crypto(conn) < 0) {
+ pr_err("iscsi_login_setup_crypto() failed\n");
+ ret = -1;
+ goto out;
+ }
+ /*
+ * Serialize access across the struct iscsi_portal_group to
+ * process login attempt.
+ */
+ if (iscsit_access_np(np, conn->tpg) < 0) {
+ iscsit_put_tiqn_for_login(tiqn);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
+ ret = -1;
+ conn->tpg = NULL;
+ goto out;
+ }
+
+ /*
+ * conn->sess->node_acl will be set when the referenced
+ * struct iscsi_session is located from received ISID+TSIH in
+ * iscsi_login_non_zero_tsih_s2().
+ */
+ if (!login->leading_connection) {
+ ret = 0;
+ goto out;
+ }
+
+ /*
+ * This value is required in iscsi_login_zero_tsih_s2()
+ */
+ sess->sess_ops->SessionType = 0;
+
+ /*
+ * Locate incoming Initiator IQN reference from Storage Node.
+ */
+ sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
+ &conn->tpg->tpg_se_tpg, i_buf);
+ if (!sess->se_sess->se_node_acl) {
+ pr_err("iSCSI Initiator Node: %s is not authorized to"
+ " access iSCSI target portal group: %hu.\n",
+ i_buf, conn->tpg->tpgt);
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+ ISCSI_LOGIN_STATUS_TGT_FORBIDDEN);
+ ret = -1;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ kfree(tmpbuf);
+ return ret;
+}
+
+struct iscsi_login *iscsi_target_init_negotiation(
+ struct iscsi_np *np,
+ struct iscsi_conn *conn,
+ char *login_pdu)
+{
+ struct iscsi_login *login;
+
+ login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
+ if (!login) {
+ pr_err("Unable to allocate memory for struct iscsi_login.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ return NULL;
+ }
+
+ login->req = kmemdup(login_pdu, ISCSI_HDR_LEN, GFP_KERNEL);
+ if (!login->req) {
+ pr_err("Unable to allocate memory for Login Request.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ goto out;
+ }
+
+ login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
+ if (!login->req_buf) {
+ pr_err("Unable to allocate memory for response buffer.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ goto out;
+ }
+ /*
+ * SessionType: Discovery
+ *
+ * Locates Default Portal
+ *
+ * SessionType: Normal
+ *
+ * Locates Target Portal from NP -> Target IQN
+ */
+ if (iscsi_target_locate_portal(np, conn, login) < 0) {
+ pr_err("iSCSI Login negotiation failed.\n");
+ goto out;
+ }
+
+ return login;
+out:
+ kfree(login->req);
+ kfree(login->req_buf);
+ kfree(login);
+
+ return NULL;
+}
+
+int iscsi_target_start_negotiation(
+ struct iscsi_login *login,
+ struct iscsi_conn *conn)
+{
+ int ret = -1;
+
+ login->rsp = kzalloc(ISCSI_HDR_LEN, GFP_KERNEL);
+ if (!login->rsp) {
+ pr_err("Unable to allocate memory for"
+ " Login Response.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ ret = -1;
+ goto out;
+ }
+
+ login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
+ if (!login->rsp_buf) {
+ pr_err("Unable to allocate memory for"
+ " request buffer.\n");
+ iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
+ ISCSI_LOGIN_STATUS_NO_RESOURCES);
+ ret = -1;
+ goto out;
+ }
+
+ ret = iscsi_target_do_login(conn, login);
+out:
+ if (ret != 0)
+ iscsi_remove_failed_auth_entry(conn);
+
+ iscsi_target_nego_release(login, conn);
+ return ret;
+}
+
+void iscsi_target_nego_release(
+ struct iscsi_login *login,
+ struct iscsi_conn *conn)
+{
+ kfree(login->req);
+ kfree(login->rsp);
+ kfree(login->req_buf);
+ kfree(login->rsp_buf);
+ kfree(login);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.h
new file mode 100644
index 0000000..92e133a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nego.h
@@ -0,0 +1,17 @@
+#ifndef ISCSI_TARGET_NEGO_H
+#define ISCSI_TARGET_NEGO_H
+
+#define DECIMAL 0
+#define HEX 1
+
+extern void convert_null_to_semi(char *, int);
+extern int extract_param(const char *, const char *, unsigned int, char *,
+ unsigned char *);
+extern struct iscsi_login *iscsi_target_init_negotiation(
+ struct iscsi_np *, struct iscsi_conn *, char *);
+extern int iscsi_target_start_negotiation(
+ struct iscsi_login *, struct iscsi_conn *);
+extern void iscsi_target_nego_release(
+ struct iscsi_login *, struct iscsi_conn *);
+
+#endif /* ISCSI_TARGET_NEGO_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.c
new file mode 100644
index 0000000..11dc293
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.c
@@ -0,0 +1,262 @@
+/*******************************************************************************
+ * This file contains the main functions related to Initiator Node Attributes.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <target/target_core_base.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_nodeattrib.h"
+
+static inline char *iscsit_na_get_initiatorname(
+ struct iscsi_node_acl *nacl)
+{
+ struct se_node_acl *se_nacl = &nacl->se_node_acl;
+
+ return &se_nacl->initiatorname[0];
+}
+
+void iscsit_set_default_node_attribues(
+ struct iscsi_node_acl *acl)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ a->dataout_timeout = NA_DATAOUT_TIMEOUT;
+ a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
+ a->nopin_timeout = NA_NOPIN_TIMEOUT;
+ a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
+ a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
+ a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
+ a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
+ a->default_erl = NA_DEFAULT_ERL;
+}
+
+int iscsit_na_dataout_timeout(
+ struct iscsi_node_acl *acl,
+ u32 dataout_timeout)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
+ pr_err("Requested DataOut Timeout %u larger than"
+ " maximum %u\n", dataout_timeout,
+ NA_DATAOUT_TIMEOUT_MAX);
+ return -EINVAL;
+ } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
+ pr_err("Requested DataOut Timeout %u smaller than"
+ " minimum %u\n", dataout_timeout,
+ NA_DATAOUT_TIMEOUT_MIX);
+ return -EINVAL;
+ }
+
+ a->dataout_timeout = dataout_timeout;
+ pr_debug("Set DataOut Timeout to %u for Initiator Node"
+ " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_dataout_timeout_retries(
+ struct iscsi_node_acl *acl,
+ u32 dataout_timeout_retries)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
+ pr_err("Requested DataOut Timeout Retries %u larger"
+ " than maximum %u", dataout_timeout_retries,
+ NA_DATAOUT_TIMEOUT_RETRIES_MAX);
+ return -EINVAL;
+ } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
+ pr_err("Requested DataOut Timeout Retries %u smaller"
+ " than minimum %u", dataout_timeout_retries,
+ NA_DATAOUT_TIMEOUT_RETRIES_MIN);
+ return -EINVAL;
+ }
+
+ a->dataout_timeout_retries = dataout_timeout_retries;
+ pr_debug("Set DataOut Timeout Retries to %u for"
+ " Initiator Node %s\n", a->dataout_timeout_retries,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_nopin_timeout(
+ struct iscsi_node_acl *acl,
+ u32 nopin_timeout)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+ struct iscsi_session *sess;
+ struct iscsi_conn *conn;
+ struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
+ struct se_session *se_sess;
+ u32 orig_nopin_timeout = a->nopin_timeout;
+
+ if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
+ pr_err("Requested NopIn Timeout %u larger than maximum"
+ " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
+ return -EINVAL;
+ } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
+ (nopin_timeout != 0)) {
+ pr_err("Requested NopIn Timeout %u smaller than"
+ " minimum %u and not 0\n", nopin_timeout,
+ NA_NOPIN_TIMEOUT_MIN);
+ return -EINVAL;
+ }
+
+ a->nopin_timeout = nopin_timeout;
+ pr_debug("Set NopIn Timeout to %u for Initiator"
+ " Node %s\n", a->nopin_timeout,
+ iscsit_na_get_initiatorname(acl));
+ /*
+ * Reenable disabled nopin_timeout timer for all iSCSI connections.
+ */
+ if (!orig_nopin_timeout) {
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+
+ spin_lock(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list,
+ conn_list) {
+ if (conn->conn_state !=
+ TARG_CONN_STATE_LOGGED_IN)
+ continue;
+
+ spin_lock(&conn->nopin_timer_lock);
+ __iscsit_start_nopin_timer(conn);
+ spin_unlock(&conn->nopin_timer_lock);
+ }
+ spin_unlock(&sess->conn_lock);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+ }
+
+ return 0;
+}
+
+int iscsit_na_nopin_response_timeout(
+ struct iscsi_node_acl *acl,
+ u32 nopin_response_timeout)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
+ pr_err("Requested NopIn Response Timeout %u larger"
+ " than maximum %u\n", nopin_response_timeout,
+ NA_NOPIN_RESPONSE_TIMEOUT_MAX);
+ return -EINVAL;
+ } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
+ pr_err("Requested NopIn Response Timeout %u smaller"
+ " than minimum %u\n", nopin_response_timeout,
+ NA_NOPIN_RESPONSE_TIMEOUT_MIN);
+ return -EINVAL;
+ }
+
+ a->nopin_response_timeout = nopin_response_timeout;
+ pr_debug("Set NopIn Response Timeout to %u for"
+ " Initiator Node %s\n", a->nopin_timeout,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_random_datain_pdu_offsets(
+ struct iscsi_node_acl *acl,
+ u32 random_datain_pdu_offsets)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
+ pr_err("Requested Random DataIN PDU Offsets: %u not"
+ " 0 or 1\n", random_datain_pdu_offsets);
+ return -EINVAL;
+ }
+
+ a->random_datain_pdu_offsets = random_datain_pdu_offsets;
+ pr_debug("Set Random DataIN PDU Offsets to %u for"
+ " Initiator Node %s\n", a->random_datain_pdu_offsets,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_random_datain_seq_offsets(
+ struct iscsi_node_acl *acl,
+ u32 random_datain_seq_offsets)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
+ pr_err("Requested Random DataIN Sequence Offsets: %u"
+ " not 0 or 1\n", random_datain_seq_offsets);
+ return -EINVAL;
+ }
+
+ a->random_datain_seq_offsets = random_datain_seq_offsets;
+ pr_debug("Set Random DataIN Sequence Offsets to %u for"
+ " Initiator Node %s\n", a->random_datain_seq_offsets,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_random_r2t_offsets(
+ struct iscsi_node_acl *acl,
+ u32 random_r2t_offsets)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
+ pr_err("Requested Random R2T Offsets: %u not"
+ " 0 or 1\n", random_r2t_offsets);
+ return -EINVAL;
+ }
+
+ a->random_r2t_offsets = random_r2t_offsets;
+ pr_debug("Set Random R2T Offsets to %u for"
+ " Initiator Node %s\n", a->random_r2t_offsets,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
+
+int iscsit_na_default_erl(
+ struct iscsi_node_acl *acl,
+ u32 default_erl)
+{
+ struct iscsi_node_attrib *a = &acl->node_attrib;
+
+ if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
+ pr_err("Requested default ERL: %u not 0, 1, or 2\n",
+ default_erl);
+ return -EINVAL;
+ }
+
+ a->default_erl = default_erl;
+ pr_debug("Set use ERL0 flag to %u for Initiator"
+ " Node %s\n", a->default_erl,
+ iscsit_na_get_initiatorname(acl));
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.h
new file mode 100644
index 0000000..c970b32
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_nodeattrib.h
@@ -0,0 +1,14 @@
+#ifndef ISCSI_TARGET_NODEATTRIB_H
+#define ISCSI_TARGET_NODEATTRIB_H
+
+extern void iscsit_set_default_node_attribues(struct iscsi_node_acl *);
+extern int iscsit_na_dataout_timeout(struct iscsi_node_acl *, u32);
+extern int iscsit_na_dataout_timeout_retries(struct iscsi_node_acl *, u32);
+extern int iscsit_na_nopin_timeout(struct iscsi_node_acl *, u32);
+extern int iscsit_na_nopin_response_timeout(struct iscsi_node_acl *, u32);
+extern int iscsit_na_random_datain_pdu_offsets(struct iscsi_node_acl *, u32);
+extern int iscsit_na_random_datain_seq_offsets(struct iscsi_node_acl *, u32);
+extern int iscsit_na_random_r2t_offsets(struct iscsi_node_acl *, u32);
+extern int iscsit_na_default_erl(struct iscsi_node_acl *, u32);
+
+#endif /* ISCSI_TARGET_NODEATTRIB_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.c
new file mode 100644
index 0000000..ed4abad
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.c
@@ -0,0 +1,1891 @@
+/*******************************************************************************
+ * This file contains main functions related to iSCSI Parameter negotiation.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/slab.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_parameters.h"
+
+int iscsi_login_rx_data(
+ struct iscsi_conn *conn,
+ char *buf,
+ int length)
+{
+ int rx_got;
+ struct kvec iov;
+
+ memset(&iov, 0, sizeof(struct kvec));
+ iov.iov_len = length;
+ iov.iov_base = buf;
+
+ /*
+ * Initial Marker-less Interval.
+ * Add the values regardless of IFMarker/OFMarker, considering
+ * it may not be negoitated yet.
+ */
+ conn->of_marker += length;
+
+ rx_got = rx_data(conn, &iov, 1, length);
+ if (rx_got != length) {
+ pr_err("rx_data returned %d, expecting %d.\n",
+ rx_got, length);
+ return -1;
+ }
+
+ return 0 ;
+}
+
+int iscsi_login_tx_data(
+ struct iscsi_conn *conn,
+ char *pdu_buf,
+ char *text_buf,
+ int text_length)
+{
+ int length, tx_sent;
+ struct kvec iov[2];
+
+ length = (ISCSI_HDR_LEN + text_length);
+
+ memset(&iov[0], 0, 2 * sizeof(struct kvec));
+ iov[0].iov_len = ISCSI_HDR_LEN;
+ iov[0].iov_base = pdu_buf;
+ iov[1].iov_len = text_length;
+ iov[1].iov_base = text_buf;
+
+ /*
+ * Initial Marker-less Interval.
+ * Add the values regardless of IFMarker/OFMarker, considering
+ * it may not be negoitated yet.
+ */
+ conn->if_marker += length;
+
+ tx_sent = tx_data(conn, &iov[0], 2, length);
+ if (tx_sent != length) {
+ pr_err("tx_data returned %d, expecting %d.\n",
+ tx_sent, length);
+ return -1;
+ }
+
+ return 0;
+}
+
+void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
+{
+ pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
+ "CRC32C" : "None");
+ pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
+ "CRC32C" : "None");
+ pr_debug("MaxRecvDataSegmentLength: %u\n",
+ conn_ops->MaxRecvDataSegmentLength);
+ pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
+ pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
+ if (conn_ops->OFMarker)
+ pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
+ if (conn_ops->IFMarker)
+ pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
+}
+
+void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
+{
+ pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
+ pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
+ pr_debug("TargetName: %s\n", sess_ops->TargetName);
+ pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
+ pr_debug("TargetPortalGroupTag: %hu\n",
+ sess_ops->TargetPortalGroupTag);
+ pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
+ pr_debug("InitialR2T: %s\n",
+ (sess_ops->InitialR2T) ? "Yes" : "No");
+ pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
+ "Yes" : "No");
+ pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
+ pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
+ pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
+ pr_debug("DefaultTime2Retain: %hu\n",
+ sess_ops->DefaultTime2Retain);
+ pr_debug("MaxOutstandingR2T: %hu\n",
+ sess_ops->MaxOutstandingR2T);
+ pr_debug("DataPDUInOrder: %s\n",
+ (sess_ops->DataPDUInOrder) ? "Yes" : "No");
+ pr_debug("DataSequenceInOrder: %s\n",
+ (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
+ pr_debug("ErrorRecoveryLevel: %hu\n",
+ sess_ops->ErrorRecoveryLevel);
+ pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
+ "Discovery" : "Normal");
+}
+
+void iscsi_print_params(struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list)
+ pr_debug("%s: %s\n", param->name, param->value);
+}
+
+static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
+ char *name, char *value, u8 phase, u8 scope, u8 sender,
+ u16 type_range, u8 use)
+{
+ struct iscsi_param *param = NULL;
+
+ param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
+ if (!param) {
+ pr_err("Unable to allocate memory for parameter.\n");
+ goto out;
+ }
+ INIT_LIST_HEAD(¶m->p_list);
+
+ param->name = kzalloc(strlen(name) + 1, GFP_KERNEL);
+ if (!param->name) {
+ pr_err("Unable to allocate memory for parameter name.\n");
+ goto out;
+ }
+
+ param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
+ if (!param->value) {
+ pr_err("Unable to allocate memory for parameter value.\n");
+ goto out;
+ }
+
+ memcpy(param->name, name, strlen(name));
+ param->name[strlen(name)] = '\0';
+ memcpy(param->value, value, strlen(value));
+ param->value[strlen(value)] = '\0';
+ param->phase = phase;
+ param->scope = scope;
+ param->sender = sender;
+ param->use = use;
+ param->type_range = type_range;
+
+ switch (param->type_range) {
+ case TYPERANGE_BOOL_AND:
+ param->type = TYPE_BOOL_AND;
+ break;
+ case TYPERANGE_BOOL_OR:
+ param->type = TYPE_BOOL_OR;
+ break;
+ case TYPERANGE_0_TO_2:
+ case TYPERANGE_0_TO_3600:
+ case TYPERANGE_0_TO_32767:
+ case TYPERANGE_0_TO_65535:
+ case TYPERANGE_1_TO_65535:
+ case TYPERANGE_2_TO_3600:
+ case TYPERANGE_512_TO_16777215:
+ param->type = TYPE_NUMBER;
+ break;
+ case TYPERANGE_AUTH:
+ case TYPERANGE_DIGEST:
+ param->type = TYPE_VALUE_LIST | TYPE_STRING;
+ break;
+ case TYPERANGE_MARKINT:
+ param->type = TYPE_NUMBER_RANGE;
+ param->type_range |= TYPERANGE_1_TO_65535;
+ break;
+ case TYPERANGE_ISCSINAME:
+ case TYPERANGE_SESSIONTYPE:
+ case TYPERANGE_TARGETADDRESS:
+ case TYPERANGE_UTF8:
+ param->type = TYPE_STRING;
+ break;
+ default:
+ pr_err("Unknown type_range 0x%02x\n",
+ param->type_range);
+ goto out;
+ }
+ list_add_tail(¶m->p_list, ¶m_list->param_list);
+
+ return param;
+out:
+ if (param) {
+ kfree(param->value);
+ kfree(param->name);
+ kfree(param);
+ }
+
+ return NULL;
+}
+
+/* #warning Add extension keys */
+int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
+{
+ struct iscsi_param *param = NULL;
+ struct iscsi_param_list *pl;
+
+ pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
+ if (!pl) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_param_list.\n");
+ return -1 ;
+ }
+ INIT_LIST_HEAD(&pl->param_list);
+ INIT_LIST_HEAD(&pl->extra_response_list);
+
+ /*
+ * The format for setting the initial parameter definitions are:
+ *
+ * Parameter name:
+ * Initial value:
+ * Allowable phase:
+ * Scope:
+ * Allowable senders:
+ * Typerange:
+ * Use:
+ */
+ param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
+ PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_AUTH, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_DIGEST, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_DIGEST, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, MAXCONNECTIONS,
+ INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
+ SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
+ PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
+ TYPERANGE_UTF8, 0);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
+ PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_ISCSINAME, USE_ALL);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, INITIATORNAME,
+ INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
+ SCOPE_SESSION_WIDE, SENDER_INITIATOR,
+ TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
+ PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
+ TYPERANGE_UTF8, USE_ALL);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, INITIATORALIAS,
+ INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
+ SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
+ USE_ALL);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, TARGETADDRESS,
+ INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
+ SCOPE_SESSION_WIDE, SENDER_TARGET,
+ TYPERANGE_TARGETADDRESS, USE_ALL);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
+ INITIAL_TARGETPORTALGROUPTAG,
+ PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
+ TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, IMMEDIATEDATA,
+ INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
+ SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
+ USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,
+ INITIAL_MAXRECVDATASEGMENTLENGTH,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_512_TO_16777215, USE_ALL);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
+ INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
+ SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,
+ INITIAL_FIRSTBURSTLENGTH,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
+ INITIAL_DEFAULTTIME2WAIT,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,
+ INITIAL_DEFAULTTIME2RETAIN,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
+ INITIAL_MAXOUTSTANDINGR2T,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, DATAPDUINORDER,
+ INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
+ SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
+ USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
+ INITIAL_DATASEQUENCEINORDER,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
+ INITIAL_ERRORRECOVERYLEVEL,
+ PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
+ TYPERANGE_0_TO_2, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
+ PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
+ TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_MARKINT, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
+ PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
+ TYPERANGE_MARKINT, USE_INITIAL_ONLY);
+ if (!param)
+ goto out;
+
+ *param_list_ptr = pl;
+ return 0;
+out:
+ iscsi_release_param_list(pl);
+ return -1;
+}
+
+int iscsi_set_keys_to_negotiate(
+ int sessiontype,
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ param->state = 0;
+ if (!strcmp(param->name, AUTHMETHOD)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, HEADERDIGEST)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, DATADIGEST)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, MAXCONNECTIONS)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, TARGETNAME)) {
+ continue;
+ } else if (!strcmp(param->name, INITIATORNAME)) {
+ continue;
+ } else if (!strcmp(param->name, TARGETALIAS)) {
+ if (param->value)
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, INITIATORALIAS)) {
+ continue;
+ } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, INITIALR2T)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, IMMEDIATEDATA)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, DATAPDUINORDER)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, SESSIONTYPE)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, IFMARKER)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, OFMARKER)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, IFMARKINT)) {
+ SET_PSTATE_NEGOTIATE(param);
+ } else if (!strcmp(param->name, OFMARKINT)) {
+ SET_PSTATE_NEGOTIATE(param);
+ }
+ }
+
+ return 0;
+}
+
+int iscsi_set_keys_irrelevant_for_discovery(
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!strcmp(param->name, MAXCONNECTIONS))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, INITIALR2T))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, IMMEDIATEDATA))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, MAXBURSTLENGTH))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, FIRSTBURSTLENGTH))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, DATAPDUINORDER))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, DATASEQUENCEINORDER))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, DEFAULTTIME2WAIT))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, IFMARKER))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, OFMARKER))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, IFMARKINT))
+ param->state &= ~PSTATE_NEGOTIATE;
+ else if (!strcmp(param->name, OFMARKINT))
+ param->state &= ~PSTATE_NEGOTIATE;
+ }
+
+ return 0;
+}
+
+int iscsi_copy_param_list(
+ struct iscsi_param_list **dst_param_list,
+ struct iscsi_param_list *src_param_list,
+ int leading)
+{
+ struct iscsi_param *param = NULL;
+ struct iscsi_param *new_param = NULL;
+ struct iscsi_param_list *param_list = NULL;
+
+ param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
+ if (!param_list) {
+ pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(¶m_list->param_list);
+ INIT_LIST_HEAD(¶m_list->extra_response_list);
+
+ list_for_each_entry(param, &src_param_list->param_list, p_list) {
+ if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
+ if ((strcmp(param->name, "TargetName") != 0) &&
+ (strcmp(param->name, "InitiatorName") != 0) &&
+ (strcmp(param->name, "TargetPortalGroupTag") != 0))
+ continue;
+ }
+
+ new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
+ if (!new_param) {
+ pr_err("Unable to allocate memory for struct iscsi_param.\n");
+ goto err_out;
+ }
+
+ new_param->name = kstrdup(param->name, GFP_KERNEL);
+ new_param->value = kstrdup(param->value, GFP_KERNEL);
+ if (!new_param->value || !new_param->name) {
+ kfree(new_param->value);
+ kfree(new_param->name);
+ kfree(new_param);
+ pr_err("Unable to allocate memory for parameter name/value.\n");
+ goto err_out;
+ }
+
+ new_param->set_param = param->set_param;
+ new_param->phase = param->phase;
+ new_param->scope = param->scope;
+ new_param->sender = param->sender;
+ new_param->type = param->type;
+ new_param->use = param->use;
+ new_param->type_range = param->type_range;
+
+ list_add_tail(&new_param->p_list, ¶m_list->param_list);
+ }
+
+ if (!list_empty(¶m_list->param_list)) {
+ *dst_param_list = param_list;
+ } else {
+ pr_err("No parameters allocated.\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ iscsi_release_param_list(param_list);
+ return -1;
+}
+
+static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
+{
+ struct iscsi_extra_response *er, *er_tmp;
+
+ list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list,
+ er_list) {
+ list_del(&er->er_list);
+ kfree(er);
+ }
+}
+
+void iscsi_release_param_list(struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param, *param_tmp;
+
+ list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list,
+ p_list) {
+ list_del(¶m->p_list);
+
+ kfree(param->name);
+ param->name = NULL;
+ kfree(param->value);
+ param->value = NULL;
+ kfree(param);
+ param = NULL;
+ }
+
+ iscsi_release_extra_responses(param_list);
+
+ kfree(param_list);
+}
+
+struct iscsi_param *iscsi_find_param_from_key(
+ char *key,
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+
+ if (!key || !param_list) {
+ pr_err("Key or parameter list pointer is NULL.\n");
+ return NULL;
+ }
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!strcmp(key, param->name))
+ return param;
+ }
+
+ pr_err("Unable to locate key \"%s\".\n", key);
+ return NULL;
+}
+
+int iscsi_extract_key_value(char *textbuf, char **key, char **value)
+{
+ *value = strchr(textbuf, '=');
+ if (!*value) {
+ pr_err("Unable to locate \"=\" seperator for key,"
+ " ignoring request.\n");
+ return -1;
+ }
+
+ *key = textbuf;
+ **value = '\0';
+ *value = *value + 1;
+
+ return 0;
+}
+
+int iscsi_update_param_value(struct iscsi_param *param, char *value)
+{
+ kfree(param->value);
+
+ param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
+ if (!param->value) {
+ pr_err("Unable to allocate memory for value.\n");
+ return -1;
+ }
+
+ memcpy(param->value, value, strlen(value));
+ param->value[strlen(value)] = '\0';
+
+ pr_debug("iSCSI Parameter updated to %s=%s\n",
+ param->name, param->value);
+ return 0;
+}
+
+static int iscsi_add_notunderstood_response(
+ char *key,
+ char *value,
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_extra_response *extra_response;
+
+ if (strlen(value) > VALUE_MAXLEN) {
+ pr_err("Value for notunderstood key \"%s\" exceeds %d,"
+ " protocol error.\n", key, VALUE_MAXLEN);
+ return -1;
+ }
+
+ extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
+ if (!extra_response) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_extra_response.\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&extra_response->er_list);
+
+ strlcpy(extra_response->key, key, sizeof(extra_response->key));
+ strlcpy(extra_response->value, NOTUNDERSTOOD,
+ sizeof(extra_response->value));
+
+ list_add_tail(&extra_response->er_list,
+ ¶m_list->extra_response_list);
+ return 0;
+}
+
+static int iscsi_check_for_auth_key(char *key)
+{
+ /*
+ * RFC 1994
+ */
+ if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
+ !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
+ !strcmp(key, "CHAP_R"))
+ return 1;
+
+ /*
+ * RFC 2945
+ */
+ if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
+ !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
+ !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
+ !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
+ return 1;
+
+ return 0;
+}
+
+static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
+{
+ if (IS_TYPE_BOOL_AND(param)) {
+ if (!strcmp(param->value, NO))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ } else if (IS_TYPE_BOOL_OR(param)) {
+ if (!strcmp(param->value, YES))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, IMMEDIATEDATA))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ } else if (IS_TYPE_NUMBER(param)) {
+ if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ /*
+ * The GlobalSAN iSCSI Initiator for MacOSX does
+ * not respond to MaxBurstLength, FirstBurstLength,
+ * DefaultTime2Wait or DefaultTime2Retain parameter keys.
+ * So, we set them to 'reply optional' here, and assume the
+ * the defaults from iscsi_parameters.h if the initiator
+ * is not RFC compliant and the keys are not negotiated.
+ */
+ if (!strcmp(param->name, MAXBURSTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ if (!strcmp(param->name, FIRSTBURSTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ if (!strcmp(param->name, DEFAULTTIME2WAIT))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ if (!strcmp(param->name, DEFAULTTIME2RETAIN))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, MAXCONNECTIONS))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ } else if (IS_PHASE_DECLARATIVE(param))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+}
+
+static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
+{
+ if (strcmp(value, YES) && strcmp(value, NO)) {
+ pr_err("Illegal value for \"%s\", must be either"
+ " \"%s\" or \"%s\".\n", param->name, YES, NO);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
+{
+ char *tmpptr;
+ int value = 0;
+
+ value = simple_strtoul(value_ptr, &tmpptr, 0);
+
+/* #warning FIXME: Fix this */
+#if 0
+ if (strspn(endptr, WHITE_SPACE) != strlen(endptr)) {
+ pr_err("Illegal value \"%s\" for \"%s\".\n",
+ value, param->name);
+ return -1;
+ }
+#endif
+ if (IS_TYPERANGE_0_TO_2(param)) {
+ if ((value < 0) || (value > 2)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 0 and 2.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_0_TO_3600(param)) {
+ if ((value < 0) || (value > 3600)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 0 and 3600.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_0_TO_32767(param)) {
+ if ((value < 0) || (value > 32767)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 0 and 32767.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_0_TO_65535(param)) {
+ if ((value < 0) || (value > 65535)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 0 and 65535.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_1_TO_65535(param)) {
+ if ((value < 1) || (value > 65535)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 1 and 65535.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_2_TO_3600(param)) {
+ if ((value < 2) || (value > 3600)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 2 and 3600.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_TYPERANGE_512_TO_16777215(param)) {
+ if ((value < 512) || (value > 16777215)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " between 512 and 16777215.\n", param->name);
+ return -1;
+ }
+ return 0;
+ }
+
+ return 0;
+}
+
+static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
+{
+ char *left_val_ptr = NULL, *right_val_ptr = NULL;
+ char *tilde_ptr = NULL;
+ u32 left_val, right_val, local_left_val;
+
+ if (strcmp(param->name, IFMARKINT) &&
+ strcmp(param->name, OFMARKINT)) {
+ pr_err("Only parameters \"%s\" or \"%s\" may contain a"
+ " numerical range value.\n", IFMARKINT, OFMARKINT);
+ return -1;
+ }
+
+ if (IS_PSTATE_PROPOSER(param))
+ return 0;
+
+ tilde_ptr = strchr(value, '~');
+ if (!tilde_ptr) {
+ pr_err("Unable to locate numerical range indicator"
+ " \"~\" for \"%s\".\n", param->name);
+ return -1;
+ }
+ *tilde_ptr = '\0';
+
+ left_val_ptr = value;
+ right_val_ptr = value + strlen(left_val_ptr) + 1;
+
+ if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
+ return -1;
+ if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
+ return -1;
+
+ left_val = simple_strtoul(left_val_ptr, NULL, 0);
+ right_val = simple_strtoul(right_val_ptr, NULL, 0);
+ *tilde_ptr = '~';
+
+ if (right_val < left_val) {
+ pr_err("Numerical range for parameter \"%s\" contains"
+ " a right value which is less than the left.\n",
+ param->name);
+ return -1;
+ }
+
+ /*
+ * For now, enforce reasonable defaults for [I,O]FMarkInt.
+ */
+ tilde_ptr = strchr(param->value, '~');
+ if (!tilde_ptr) {
+ pr_err("Unable to locate numerical range indicator"
+ " \"~\" for \"%s\".\n", param->name);
+ return -1;
+ }
+ *tilde_ptr = '\0';
+
+ left_val_ptr = param->value;
+ right_val_ptr = param->value + strlen(left_val_ptr) + 1;
+
+ local_left_val = simple_strtoul(left_val_ptr, NULL, 0);
+ *tilde_ptr = '~';
+
+ if (param->set_param) {
+ if ((left_val < local_left_val) ||
+ (right_val < local_left_val)) {
+ pr_err("Passed value range \"%u~%u\" is below"
+ " minimum left value \"%u\" for key \"%s\","
+ " rejecting.\n", left_val, right_val,
+ local_left_val, param->name);
+ return -1;
+ }
+ } else {
+ if ((left_val < local_left_val) &&
+ (right_val < local_left_val)) {
+ pr_err("Received value range \"%u~%u\" is"
+ " below minimum left value \"%u\" for key"
+ " \"%s\", rejecting.\n", left_val, right_val,
+ local_left_val, param->name);
+ SET_PSTATE_REJECT(param);
+ if (iscsi_update_param_value(param, REJECT) < 0)
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
+{
+ if (IS_PSTATE_PROPOSER(param))
+ return 0;
+
+ if (IS_TYPERANGE_AUTH_PARAM(param)) {
+ if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
+ strcmp(value, SPKM2) && strcmp(value, SRP) &&
+ strcmp(value, CHAP) && strcmp(value, NONE)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
+ " or \"%s\".\n", param->name, KRB5,
+ SPKM1, SPKM2, SRP, CHAP, NONE);
+ return -1;
+ }
+ }
+ if (IS_TYPERANGE_DIGEST_PARAM(param)) {
+ if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " \"%s\" or \"%s\".\n", param->name,
+ CRC32C, NONE);
+ return -1;
+ }
+ }
+ if (IS_TYPERANGE_SESSIONTYPE(param)) {
+ if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
+ pr_err("Illegal value for \"%s\", must be"
+ " \"%s\" or \"%s\".\n", param->name,
+ DISCOVERY, NORMAL);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This function is used to pick a value range number, currently just
+ * returns the lesser of both right values.
+ */
+static char *iscsi_get_value_from_number_range(
+ struct iscsi_param *param,
+ char *value)
+{
+ char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
+ u32 acceptor_right_value, proposer_right_value;
+
+ tilde_ptr1 = strchr(value, '~');
+ if (!tilde_ptr1)
+ return NULL;
+ *tilde_ptr1++ = '\0';
+ proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
+
+ tilde_ptr2 = strchr(param->value, '~');
+ if (!tilde_ptr2)
+ return NULL;
+ *tilde_ptr2++ = '\0';
+ acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
+
+ return (acceptor_right_value >= proposer_right_value) ?
+ tilde_ptr1 : tilde_ptr2;
+}
+
+static char *iscsi_check_valuelist_for_support(
+ struct iscsi_param *param,
+ char *value)
+{
+ char *tmp1 = NULL, *tmp2 = NULL;
+ char *acceptor_values = NULL, *proposer_values = NULL;
+
+ acceptor_values = param->value;
+ proposer_values = value;
+
+ do {
+ if (!proposer_values)
+ return NULL;
+ tmp1 = strchr(proposer_values, ',');
+ if (tmp1)
+ *tmp1 = '\0';
+ acceptor_values = param->value;
+ do {
+ if (!acceptor_values) {
+ if (tmp1)
+ *tmp1 = ',';
+ return NULL;
+ }
+ tmp2 = strchr(acceptor_values, ',');
+ if (tmp2)
+ *tmp2 = '\0';
+ if (!acceptor_values || !proposer_values) {
+ if (tmp1)
+ *tmp1 = ',';
+ if (tmp2)
+ *tmp2 = ',';
+ return NULL;
+ }
+ if (!strcmp(acceptor_values, proposer_values)) {
+ if (tmp2)
+ *tmp2 = ',';
+ goto out;
+ }
+ if (tmp2)
+ *tmp2++ = ',';
+
+ acceptor_values = tmp2;
+ if (!acceptor_values)
+ break;
+ } while (acceptor_values);
+ if (tmp1)
+ *tmp1++ = ',';
+ proposer_values = tmp1;
+ } while (proposer_values);
+
+out:
+ return proposer_values;
+}
+
+static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value)
+{
+ u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
+ char *negoitated_value = NULL;
+
+ if (IS_PSTATE_ACCEPTOR(param)) {
+ pr_err("Received key \"%s\" twice, protocol error.\n",
+ param->name);
+ return -1;
+ }
+
+ if (IS_PSTATE_REJECT(param))
+ return 0;
+
+ if (IS_TYPE_BOOL_AND(param)) {
+ if (!strcmp(value, YES))
+ proposer_boolean_value = 1;
+ if (!strcmp(param->value, YES))
+ acceptor_boolean_value = 1;
+ if (acceptor_boolean_value && proposer_boolean_value)
+ do {} while (0);
+ else {
+ if (iscsi_update_param_value(param, NO) < 0)
+ return -1;
+ if (!proposer_boolean_value)
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
+ } else if (IS_TYPE_BOOL_OR(param)) {
+ if (!strcmp(value, YES))
+ proposer_boolean_value = 1;
+ if (!strcmp(param->value, YES))
+ acceptor_boolean_value = 1;
+ if (acceptor_boolean_value || proposer_boolean_value) {
+ if (iscsi_update_param_value(param, YES) < 0)
+ return -1;
+ if (proposer_boolean_value)
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
+ } else if (IS_TYPE_NUMBER(param)) {
+ char *tmpptr, buf[10];
+ u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
+ u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
+
+ memset(buf, 0, 10);
+
+ if (!strcmp(param->name, MAXCONNECTIONS) ||
+ !strcmp(param->name, MAXBURSTLENGTH) ||
+ !strcmp(param->name, FIRSTBURSTLENGTH) ||
+ !strcmp(param->name, MAXOUTSTANDINGR2T) ||
+ !strcmp(param->name, DEFAULTTIME2RETAIN) ||
+ !strcmp(param->name, ERRORRECOVERYLEVEL)) {
+ if (proposer_value > acceptor_value) {
+ sprintf(buf, "%u", acceptor_value);
+ if (iscsi_update_param_value(param,
+ &buf[0]) < 0)
+ return -1;
+ } else {
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+ }
+ } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
+ if (acceptor_value > proposer_value) {
+ sprintf(buf, "%u", acceptor_value);
+ if (iscsi_update_param_value(param,
+ &buf[0]) < 0)
+ return -1;
+ } else {
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+ }
+ } else {
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+ }
+
+ if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ } else if (IS_TYPE_NUMBER_RANGE(param)) {
+ negoitated_value = iscsi_get_value_from_number_range(
+ param, value);
+ if (!negoitated_value)
+ return -1;
+ if (iscsi_update_param_value(param, negoitated_value) < 0)
+ return -1;
+ } else if (IS_TYPE_VALUE_LIST(param)) {
+ negoitated_value = iscsi_check_valuelist_for_support(
+ param, value);
+ if (!negoitated_value) {
+ pr_err("Proposer's value list \"%s\" contains"
+ " no valid values from Acceptor's value list"
+ " \"%s\".\n", value, param->value);
+ return -1;
+ }
+ if (iscsi_update_param_value(param, negoitated_value) < 0)
+ return -1;
+ } else if (IS_PHASE_DECLARATIVE(param)) {
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
+
+ return 0;
+}
+
+static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
+{
+ if (IS_PSTATE_RESPONSE_GOT(param)) {
+ pr_err("Received key \"%s\" twice, protocol error.\n",
+ param->name);
+ return -1;
+ }
+
+ if (IS_TYPE_NUMBER_RANGE(param)) {
+ u32 left_val = 0, right_val = 0, recieved_value = 0;
+ char *left_val_ptr = NULL, *right_val_ptr = NULL;
+ char *tilde_ptr = NULL;
+
+ if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+ return 0;
+ }
+
+ tilde_ptr = strchr(value, '~');
+ if (tilde_ptr) {
+ pr_err("Illegal \"~\" in response for \"%s\".\n",
+ param->name);
+ return -1;
+ }
+ tilde_ptr = strchr(param->value, '~');
+ if (!tilde_ptr) {
+ pr_err("Unable to locate numerical range"
+ " indicator \"~\" for \"%s\".\n", param->name);
+ return -1;
+ }
+ *tilde_ptr = '\0';
+
+ left_val_ptr = param->value;
+ right_val_ptr = param->value + strlen(left_val_ptr) + 1;
+ left_val = simple_strtoul(left_val_ptr, NULL, 0);
+ right_val = simple_strtoul(right_val_ptr, NULL, 0);
+ recieved_value = simple_strtoul(value, NULL, 0);
+
+ *tilde_ptr = '~';
+
+ if ((recieved_value < left_val) ||
+ (recieved_value > right_val)) {
+ pr_err("Illegal response \"%s=%u\", value must"
+ " be between %u and %u.\n", param->name,
+ recieved_value, left_val, right_val);
+ return -1;
+ }
+ } else if (IS_TYPE_VALUE_LIST(param)) {
+ char *comma_ptr = NULL, *tmp_ptr = NULL;
+
+ comma_ptr = strchr(value, ',');
+ if (comma_ptr) {
+ pr_err("Illegal \",\" in response for \"%s\".\n",
+ param->name);
+ return -1;
+ }
+
+ tmp_ptr = iscsi_check_valuelist_for_support(param, value);
+ if (!tmp_ptr)
+ return -1;
+ }
+
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int iscsi_check_value(struct iscsi_param *param, char *value)
+{
+ char *comma_ptr = NULL;
+
+ if (!strcmp(value, REJECT)) {
+ if (!strcmp(param->name, IFMARKINT) ||
+ !strcmp(param->name, OFMARKINT)) {
+ /*
+ * Reject is not fatal for [I,O]FMarkInt, and causes
+ * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
+ */
+ SET_PSTATE_REJECT(param);
+ return 0;
+ }
+ pr_err("Received %s=%s\n", param->name, value);
+ return -1;
+ }
+ if (!strcmp(value, IRRELEVANT)) {
+ pr_debug("Received %s=%s\n", param->name, value);
+ SET_PSTATE_IRRELEVANT(param);
+ return 0;
+ }
+ if (!strcmp(value, NOTUNDERSTOOD)) {
+ if (!IS_PSTATE_PROPOSER(param)) {
+ pr_err("Received illegal offer %s=%s\n",
+ param->name, value);
+ return -1;
+ }
+
+/* #warning FIXME: Add check for X-ExtensionKey here */
+ pr_err("Standard iSCSI key \"%s\" cannot be answered"
+ " with \"%s\", protocol error.\n", param->name, value);
+ return -1;
+ }
+
+ do {
+ comma_ptr = NULL;
+ comma_ptr = strchr(value, ',');
+
+ if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
+ pr_err("Detected value seperator \",\", but"
+ " key \"%s\" does not allow a value list,"
+ " protocol error.\n", param->name);
+ return -1;
+ }
+ if (comma_ptr)
+ *comma_ptr = '\0';
+
+ if (strlen(value) > VALUE_MAXLEN) {
+ pr_err("Value for key \"%s\" exceeds %d,"
+ " protocol error.\n", param->name,
+ VALUE_MAXLEN);
+ return -1;
+ }
+
+ if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
+ if (iscsi_check_boolean_value(param, value) < 0)
+ return -1;
+ } else if (IS_TYPE_NUMBER(param)) {
+ if (iscsi_check_numerical_value(param, value) < 0)
+ return -1;
+ } else if (IS_TYPE_NUMBER_RANGE(param)) {
+ if (iscsi_check_numerical_range_value(param, value) < 0)
+ return -1;
+ } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
+ if (iscsi_check_string_or_list_value(param, value) < 0)
+ return -1;
+ } else {
+ pr_err("Huh? 0x%02x\n", param->type);
+ return -1;
+ }
+
+ if (comma_ptr)
+ *comma_ptr++ = ',';
+
+ value = comma_ptr;
+ } while (value);
+
+ return 0;
+}
+
+static struct iscsi_param *__iscsi_check_key(
+ char *key,
+ int sender,
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+
+ if (strlen(key) > KEY_MAXLEN) {
+ pr_err("Length of key name \"%s\" exceeds %d.\n",
+ key, KEY_MAXLEN);
+ return NULL;
+ }
+
+ param = iscsi_find_param_from_key(key, param_list);
+ if (!param)
+ return NULL;
+
+ if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
+ pr_err("Key \"%s\" may not be sent to %s,"
+ " protocol error.\n", param->name,
+ (sender & SENDER_RECEIVER) ? "target" : "initiator");
+ return NULL;
+ }
+
+ if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
+ pr_err("Key \"%s\" may not be sent to %s,"
+ " protocol error.\n", param->name,
+ (sender & SENDER_RECEIVER) ? "initiator" : "target");
+ return NULL;
+ }
+
+ return param;
+}
+
+static struct iscsi_param *iscsi_check_key(
+ char *key,
+ int phase,
+ int sender,
+ struct iscsi_param_list *param_list)
+{
+ struct iscsi_param *param;
+ /*
+ * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
+ */
+ if (strlen(key) > KEY_MAXLEN) {
+ pr_err("Length of key name \"%s\" exceeds %d.\n",
+ key, KEY_MAXLEN);
+ return NULL;
+ }
+
+ param = iscsi_find_param_from_key(key, param_list);
+ if (!param)
+ return NULL;
+
+ if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
+ pr_err("Key \"%s\" may not be sent to %s,"
+ " protocol error.\n", param->name,
+ (sender & SENDER_RECEIVER) ? "target" : "initiator");
+ return NULL;
+ }
+ if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
+ pr_err("Key \"%s\" may not be sent to %s,"
+ " protocol error.\n", param->name,
+ (sender & SENDER_RECEIVER) ? "initiator" : "target");
+ return NULL;
+ }
+
+ if (IS_PSTATE_ACCEPTOR(param)) {
+ pr_err("Key \"%s\" received twice, protocol error.\n",
+ key);
+ return NULL;
+ }
+
+ if (!phase)
+ return param;
+
+ if (!(param->phase & phase)) {
+ pr_err("Key \"%s\" may not be negotiated during ",
+ param->name);
+ switch (phase) {
+ case PHASE_SECURITY:
+ pr_debug("Security phase.\n");
+ break;
+ case PHASE_OPERATIONAL:
+ pr_debug("Operational phase.\n");
+ default:
+ pr_debug("Unknown phase.\n");
+ }
+ return NULL;
+ }
+
+ return param;
+}
+
+static int iscsi_enforce_integrity_rules(
+ u8 phase,
+ struct iscsi_param_list *param_list)
+{
+ char *tmpptr;
+ u8 DataSequenceInOrder = 0;
+ u8 ErrorRecoveryLevel = 0, SessionType = 0;
+ u8 IFMarker = 0, OFMarker = 0;
+ u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
+ u32 FirstBurstLength = 0, MaxBurstLength = 0;
+ struct iscsi_param *param = NULL;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!(param->phase & phase))
+ continue;
+ if (!strcmp(param->name, SESSIONTYPE))
+ if (!strcmp(param->value, NORMAL))
+ SessionType = 1;
+ if (!strcmp(param->name, ERRORRECOVERYLEVEL))
+ ErrorRecoveryLevel = simple_strtoul(param->value,
+ &tmpptr, 0);
+ if (!strcmp(param->name, DATASEQUENCEINORDER))
+ if (!strcmp(param->value, YES))
+ DataSequenceInOrder = 1;
+ if (!strcmp(param->name, MAXBURSTLENGTH))
+ MaxBurstLength = simple_strtoul(param->value,
+ &tmpptr, 0);
+ if (!strcmp(param->name, IFMARKER))
+ if (!strcmp(param->value, YES))
+ IFMarker = 1;
+ if (!strcmp(param->name, OFMARKER))
+ if (!strcmp(param->value, YES))
+ OFMarker = 1;
+ if (!strcmp(param->name, IFMARKINT))
+ if (!strcmp(param->value, REJECT))
+ IFMarkInt_Reject = 1;
+ if (!strcmp(param->name, OFMARKINT))
+ if (!strcmp(param->value, REJECT))
+ OFMarkInt_Reject = 1;
+ }
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!(param->phase & phase))
+ continue;
+ if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
+ (strcmp(param->name, IFMARKER) &&
+ strcmp(param->name, OFMARKER) &&
+ strcmp(param->name, IFMARKINT) &&
+ strcmp(param->name, OFMARKINT))))
+ continue;
+ if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
+ DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
+ if (strcmp(param->value, "1")) {
+ if (iscsi_update_param_value(param, "1") < 0)
+ return -1;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ }
+ if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
+ if (strcmp(param->value, "1")) {
+ if (iscsi_update_param_value(param, "1") < 0)
+ return -1;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ }
+ if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
+ FirstBurstLength = simple_strtoul(param->value,
+ &tmpptr, 0);
+ if (FirstBurstLength > MaxBurstLength) {
+ char tmpbuf[10];
+ memset(tmpbuf, 0, 10);
+ sprintf(tmpbuf, "%u", MaxBurstLength);
+ if (iscsi_update_param_value(param, tmpbuf))
+ return -1;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ }
+ if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
+ if (iscsi_update_param_value(param, NO) < 0)
+ return -1;
+ IFMarker = 0;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
+ if (iscsi_update_param_value(param, NO) < 0)
+ return -1;
+ OFMarker = 0;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
+ if (!strcmp(param->value, REJECT))
+ continue;
+ param->state &= ~PSTATE_NEGOTIATE;
+ if (iscsi_update_param_value(param, IRRELEVANT) < 0)
+ return -1;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
+ if (!strcmp(param->value, REJECT))
+ continue;
+ param->state &= ~PSTATE_NEGOTIATE;
+ if (iscsi_update_param_value(param, IRRELEVANT) < 0)
+ return -1;
+ pr_debug("Reset \"%s\" to \"%s\".\n",
+ param->name, param->value);
+ }
+ }
+
+ return 0;
+}
+
+int iscsi_decode_text_input(
+ u8 phase,
+ u8 sender,
+ char *textbuf,
+ u32 length,
+ struct iscsi_param_list *param_list)
+{
+ char *tmpbuf, *start = NULL, *end = NULL;
+
+ tmpbuf = kzalloc(length + 1, GFP_KERNEL);
+ if (!tmpbuf) {
+ pr_err("Unable to allocate memory for tmpbuf.\n");
+ return -1;
+ }
+
+ memcpy(tmpbuf, textbuf, length);
+ tmpbuf[length] = '\0';
+ start = tmpbuf;
+ end = (start + length);
+
+ while (start < end) {
+ char *key, *value;
+ struct iscsi_param *param;
+
+ if (iscsi_extract_key_value(start, &key, &value) < 0) {
+ kfree(tmpbuf);
+ return -1;
+ }
+
+ pr_debug("Got key: %s=%s\n", key, value);
+
+ if (phase & PHASE_SECURITY) {
+ if (iscsi_check_for_auth_key(key) > 0) {
+ kfree(tmpbuf);
+ return 1;
+ }
+ }
+
+ param = iscsi_check_key(key, phase, sender, param_list);
+ if (!param) {
+ if (iscsi_add_notunderstood_response(key,
+ value, param_list) < 0) {
+ kfree(tmpbuf);
+ return -1;
+ }
+ start += strlen(key) + strlen(value) + 2;
+ continue;
+ }
+ if (iscsi_check_value(param, value) < 0) {
+ kfree(tmpbuf);
+ return -1;
+ }
+
+ start += strlen(key) + strlen(value) + 2;
+
+ if (IS_PSTATE_PROPOSER(param)) {
+ if (iscsi_check_proposer_state(param, value) < 0) {
+ kfree(tmpbuf);
+ return -1;
+ }
+ SET_PSTATE_RESPONSE_GOT(param);
+ } else {
+ if (iscsi_check_acceptor_state(param, value) < 0) {
+ kfree(tmpbuf);
+ return -1;
+ }
+ SET_PSTATE_ACCEPTOR(param);
+ }
+ }
+
+ kfree(tmpbuf);
+ return 0;
+}
+
+int iscsi_encode_text_output(
+ u8 phase,
+ u8 sender,
+ char *textbuf,
+ u32 *length,
+ struct iscsi_param_list *param_list)
+{
+ char *output_buf = NULL;
+ struct iscsi_extra_response *er;
+ struct iscsi_param *param;
+
+ output_buf = textbuf + *length;
+
+ if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
+ return -1;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!(param->sender & sender))
+ continue;
+ if (IS_PSTATE_ACCEPTOR(param) &&
+ !IS_PSTATE_RESPONSE_SENT(param) &&
+ !IS_PSTATE_REPLY_OPTIONAL(param) &&
+ (param->phase & phase)) {
+ *length += sprintf(output_buf, "%s=%s",
+ param->name, param->value);
+ *length += 1;
+ output_buf = textbuf + *length;
+ SET_PSTATE_RESPONSE_SENT(param);
+ pr_debug("Sending key: %s=%s\n",
+ param->name, param->value);
+ continue;
+ }
+ if (IS_PSTATE_NEGOTIATE(param) &&
+ !IS_PSTATE_ACCEPTOR(param) &&
+ !IS_PSTATE_PROPOSER(param) &&
+ (param->phase & phase)) {
+ *length += sprintf(output_buf, "%s=%s",
+ param->name, param->value);
+ *length += 1;
+ output_buf = textbuf + *length;
+ SET_PSTATE_PROPOSER(param);
+ iscsi_check_proposer_for_optional_reply(param);
+ pr_debug("Sending key: %s=%s\n",
+ param->name, param->value);
+ }
+ }
+
+ list_for_each_entry(er, ¶m_list->extra_response_list, er_list) {
+ *length += sprintf(output_buf, "%s=%s", er->key, er->value);
+ *length += 1;
+ output_buf = textbuf + *length;
+ pr_debug("Sending key: %s=%s\n", er->key, er->value);
+ }
+ iscsi_release_extra_responses(param_list);
+
+ return 0;
+}
+
+int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
+{
+ int ret = 0;
+ struct iscsi_param *param;
+
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (IS_PSTATE_NEGOTIATE(param) &&
+ IS_PSTATE_PROPOSER(param) &&
+ !IS_PSTATE_RESPONSE_GOT(param) &&
+ !IS_PSTATE_REPLY_OPTIONAL(param) &&
+ !IS_PHASE_DECLARATIVE(param)) {
+ pr_err("No response for proposed key \"%s\".\n",
+ param->name);
+ ret = -1;
+ }
+ }
+
+ return ret;
+}
+
+int iscsi_change_param_value(
+ char *keyvalue,
+ struct iscsi_param_list *param_list,
+ int check_key)
+{
+ char *key = NULL, *value = NULL;
+ struct iscsi_param *param;
+ int sender = 0;
+
+ if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
+ return -1;
+
+ if (!check_key) {
+ param = __iscsi_check_key(keyvalue, sender, param_list);
+ if (!param)
+ return -1;
+ } else {
+ param = iscsi_check_key(keyvalue, 0, sender, param_list);
+ if (!param)
+ return -1;
+
+ param->set_param = 1;
+ if (iscsi_check_value(param, value) < 0) {
+ param->set_param = 0;
+ return -1;
+ }
+ param->set_param = 0;
+ }
+
+ if (iscsi_update_param_value(param, value) < 0)
+ return -1;
+
+ return 0;
+}
+
+void iscsi_set_connection_parameters(
+ struct iscsi_conn_ops *ops,
+ struct iscsi_param_list *param_list)
+{
+ char *tmpptr;
+ struct iscsi_param *param;
+
+ pr_debug("---------------------------------------------------"
+ "---------------\n");
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
+ continue;
+ if (!strcmp(param->name, AUTHMETHOD)) {
+ pr_debug("AuthMethod: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, HEADERDIGEST)) {
+ ops->HeaderDigest = !strcmp(param->value, CRC32C);
+ pr_debug("HeaderDigest: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, DATADIGEST)) {
+ ops->DataDigest = !strcmp(param->value, CRC32C);
+ pr_debug("DataDigest: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
+ ops->MaxRecvDataSegmentLength =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("MaxRecvDataSegmentLength: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, OFMARKER)) {
+ ops->OFMarker = !strcmp(param->value, YES);
+ pr_debug("OFMarker: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, IFMARKER)) {
+ ops->IFMarker = !strcmp(param->value, YES);
+ pr_debug("IFMarker: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, OFMARKINT)) {
+ ops->OFMarkInt =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("OFMarkInt: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, IFMARKINT)) {
+ ops->IFMarkInt =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("IFMarkInt: %s\n",
+ param->value);
+ }
+ }
+ pr_debug("----------------------------------------------------"
+ "--------------\n");
+}
+
+void iscsi_set_session_parameters(
+ struct iscsi_sess_ops *ops,
+ struct iscsi_param_list *param_list,
+ int leading)
+{
+ char *tmpptr;
+ struct iscsi_param *param;
+
+ pr_debug("----------------------------------------------------"
+ "--------------\n");
+ list_for_each_entry(param, ¶m_list->param_list, p_list) {
+ if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
+ continue;
+ if (!strcmp(param->name, INITIATORNAME)) {
+ if (!param->value)
+ continue;
+ if (leading)
+ snprintf(ops->InitiatorName,
+ sizeof(ops->InitiatorName),
+ "%s", param->value);
+ pr_debug("InitiatorName: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, INITIATORALIAS)) {
+ if (!param->value)
+ continue;
+ snprintf(ops->InitiatorAlias,
+ sizeof(ops->InitiatorAlias),
+ "%s", param->value);
+ pr_debug("InitiatorAlias: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, TARGETNAME)) {
+ if (!param->value)
+ continue;
+ if (leading)
+ snprintf(ops->TargetName,
+ sizeof(ops->TargetName),
+ "%s", param->value);
+ pr_debug("TargetName: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, TARGETALIAS)) {
+ if (!param->value)
+ continue;
+ snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
+ "%s", param->value);
+ pr_debug("TargetAlias: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
+ ops->TargetPortalGroupTag =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("TargetPortalGroupTag: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, MAXCONNECTIONS)) {
+ ops->MaxConnections =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("MaxConnections: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, INITIALR2T)) {
+ ops->InitialR2T = !strcmp(param->value, YES);
+ pr_debug("InitialR2T: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, IMMEDIATEDATA)) {
+ ops->ImmediateData = !strcmp(param->value, YES);
+ pr_debug("ImmediateData: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
+ ops->MaxBurstLength =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("MaxBurstLength: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
+ ops->FirstBurstLength =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("FirstBurstLength: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
+ ops->DefaultTime2Wait =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("DefaultTime2Wait: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
+ ops->DefaultTime2Retain =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("DefaultTime2Retain: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
+ ops->MaxOutstandingR2T =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("MaxOutstandingR2T: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, DATAPDUINORDER)) {
+ ops->DataPDUInOrder = !strcmp(param->value, YES);
+ pr_debug("DataPDUInOrder: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
+ ops->DataSequenceInOrder = !strcmp(param->value, YES);
+ pr_debug("DataSequenceInOrder: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
+ ops->ErrorRecoveryLevel =
+ simple_strtoul(param->value, &tmpptr, 0);
+ pr_debug("ErrorRecoveryLevel: %s\n",
+ param->value);
+ } else if (!strcmp(param->name, SESSIONTYPE)) {
+ ops->SessionType = !strcmp(param->value, DISCOVERY);
+ pr_debug("SessionType: %s\n",
+ param->value);
+ }
+ }
+ pr_debug("----------------------------------------------------"
+ "--------------\n");
+
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.h
new file mode 100644
index 0000000..83eed65
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_parameters.h
@@ -0,0 +1,271 @@
+#ifndef ISCSI_PARAMETERS_H
+#define ISCSI_PARAMETERS_H
+
+#include <scsi/iscsi_proto.h>
+
+struct iscsi_extra_response {
+ char key[KEY_MAXLEN];
+ char value[32];
+ struct list_head er_list;
+} ____cacheline_aligned;
+
+struct iscsi_param {
+ char *name;
+ char *value;
+ u8 set_param;
+ u8 phase;
+ u8 scope;
+ u8 sender;
+ u8 type;
+ u8 use;
+ u16 type_range;
+ u32 state;
+ struct list_head p_list;
+} ____cacheline_aligned;
+
+extern int iscsi_login_rx_data(struct iscsi_conn *, char *, int);
+extern int iscsi_login_tx_data(struct iscsi_conn *, char *, char *, int);
+extern void iscsi_dump_conn_ops(struct iscsi_conn_ops *);
+extern void iscsi_dump_sess_ops(struct iscsi_sess_ops *);
+extern void iscsi_print_params(struct iscsi_param_list *);
+extern int iscsi_create_default_params(struct iscsi_param_list **);
+extern int iscsi_set_keys_to_negotiate(int, struct iscsi_param_list *);
+extern int iscsi_set_keys_irrelevant_for_discovery(struct iscsi_param_list *);
+extern int iscsi_copy_param_list(struct iscsi_param_list **,
+ struct iscsi_param_list *, int);
+extern int iscsi_change_param_value(char *, struct iscsi_param_list *, int);
+extern void iscsi_release_param_list(struct iscsi_param_list *);
+extern struct iscsi_param *iscsi_find_param_from_key(char *, struct iscsi_param_list *);
+extern int iscsi_extract_key_value(char *, char **, char **);
+extern int iscsi_update_param_value(struct iscsi_param *, char *);
+extern int iscsi_decode_text_input(u8, u8, char *, u32, struct iscsi_param_list *);
+extern int iscsi_encode_text_output(u8, u8, char *, u32 *,
+ struct iscsi_param_list *);
+extern int iscsi_check_negotiated_keys(struct iscsi_param_list *);
+extern void iscsi_set_connection_parameters(struct iscsi_conn_ops *,
+ struct iscsi_param_list *);
+extern void iscsi_set_session_parameters(struct iscsi_sess_ops *,
+ struct iscsi_param_list *, int);
+
+#define YES "Yes"
+#define NO "No"
+#define ALL "All"
+#define IRRELEVANT "Irrelevant"
+#define NONE "None"
+#define NOTUNDERSTOOD "NotUnderstood"
+#define REJECT "Reject"
+
+/*
+ * The Parameter Names.
+ */
+#define AUTHMETHOD "AuthMethod"
+#define HEADERDIGEST "HeaderDigest"
+#define DATADIGEST "DataDigest"
+#define MAXCONNECTIONS "MaxConnections"
+#define SENDTARGETS "SendTargets"
+#define TARGETNAME "TargetName"
+#define INITIATORNAME "InitiatorName"
+#define TARGETALIAS "TargetAlias"
+#define INITIATORALIAS "InitiatorAlias"
+#define TARGETADDRESS "TargetAddress"
+#define TARGETPORTALGROUPTAG "TargetPortalGroupTag"
+#define INITIALR2T "InitialR2T"
+#define IMMEDIATEDATA "ImmediateData"
+#define MAXRECVDATASEGMENTLENGTH "MaxRecvDataSegmentLength"
+#define MAXBURSTLENGTH "MaxBurstLength"
+#define FIRSTBURSTLENGTH "FirstBurstLength"
+#define DEFAULTTIME2WAIT "DefaultTime2Wait"
+#define DEFAULTTIME2RETAIN "DefaultTime2Retain"
+#define MAXOUTSTANDINGR2T "MaxOutstandingR2T"
+#define DATAPDUINORDER "DataPDUInOrder"
+#define DATASEQUENCEINORDER "DataSequenceInOrder"
+#define ERRORRECOVERYLEVEL "ErrorRecoveryLevel"
+#define SESSIONTYPE "SessionType"
+#define IFMARKER "IFMarker"
+#define OFMARKER "OFMarker"
+#define IFMARKINT "IFMarkInt"
+#define OFMARKINT "OFMarkInt"
+#define X_EXTENSIONKEY "X-com.sbei.version"
+#define X_EXTENSIONKEY_CISCO_NEW "X-com.cisco.protocol"
+#define X_EXTENSIONKEY_CISCO_OLD "X-com.cisco.iscsi.draft"
+
+/*
+ * For AuthMethod.
+ */
+#define KRB5 "KRB5"
+#define SPKM1 "SPKM1"
+#define SPKM2 "SPKM2"
+#define SRP "SRP"
+#define CHAP "CHAP"
+
+/*
+ * Initial values for Parameter Negotiation.
+ */
+#define INITIAL_AUTHMETHOD CHAP
+#define INITIAL_HEADERDIGEST "CRC32C,None"
+#define INITIAL_DATADIGEST "CRC32C,None"
+#define INITIAL_MAXCONNECTIONS "1"
+#define INITIAL_SENDTARGETS ALL
+#define INITIAL_TARGETNAME "LIO.Target"
+#define INITIAL_INITIATORNAME "LIO.Initiator"
+#define INITIAL_TARGETALIAS "LIO Target"
+#define INITIAL_INITIATORALIAS "LIO Initiator"
+#define INITIAL_TARGETADDRESS "0.0.0.0:0000,0"
+#define INITIAL_TARGETPORTALGROUPTAG "1"
+#define INITIAL_INITIALR2T YES
+#define INITIAL_IMMEDIATEDATA YES
+#define INITIAL_MAXRECVDATASEGMENTLENGTH "8192"
+#define INITIAL_MAXBURSTLENGTH "262144"
+#define INITIAL_FIRSTBURSTLENGTH "65536"
+#define INITIAL_DEFAULTTIME2WAIT "2"
+#define INITIAL_DEFAULTTIME2RETAIN "20"
+#define INITIAL_MAXOUTSTANDINGR2T "1"
+#define INITIAL_DATAPDUINORDER YES
+#define INITIAL_DATASEQUENCEINORDER YES
+#define INITIAL_ERRORRECOVERYLEVEL "0"
+#define INITIAL_SESSIONTYPE NORMAL
+#define INITIAL_IFMARKER NO
+#define INITIAL_OFMARKER NO
+#define INITIAL_IFMARKINT "2048~65535"
+#define INITIAL_OFMARKINT "2048~65535"
+
+/*
+ * For [Header,Data]Digests.
+ */
+#define CRC32C "CRC32C"
+
+/*
+ * For SessionType.
+ */
+#define DISCOVERY "Discovery"
+#define NORMAL "Normal"
+
+/*
+ * struct iscsi_param->use
+ */
+#define USE_LEADING_ONLY 0x01
+#define USE_INITIAL_ONLY 0x02
+#define USE_ALL 0x04
+
+#define IS_USE_LEADING_ONLY(p) ((p)->use & USE_LEADING_ONLY)
+#define IS_USE_INITIAL_ONLY(p) ((p)->use & USE_INITIAL_ONLY)
+#define IS_USE_ALL(p) ((p)->use & USE_ALL)
+
+#define SET_USE_INITIAL_ONLY(p) ((p)->use |= USE_INITIAL_ONLY)
+
+/*
+ * struct iscsi_param->sender
+ */
+#define SENDER_INITIATOR 0x01
+#define SENDER_TARGET 0x02
+#define SENDER_BOTH 0x03
+/* Used in iscsi_check_key() */
+#define SENDER_RECEIVER 0x04
+
+#define IS_SENDER_INITIATOR(p) ((p)->sender & SENDER_INITIATOR)
+#define IS_SENDER_TARGET(p) ((p)->sender & SENDER_TARGET)
+#define IS_SENDER_BOTH(p) ((p)->sender & SENDER_BOTH)
+
+/*
+ * struct iscsi_param->scope
+ */
+#define SCOPE_CONNECTION_ONLY 0x01
+#define SCOPE_SESSION_WIDE 0x02
+
+#define IS_SCOPE_CONNECTION_ONLY(p) ((p)->scope & SCOPE_CONNECTION_ONLY)
+#define IS_SCOPE_SESSION_WIDE(p) ((p)->scope & SCOPE_SESSION_WIDE)
+
+/*
+ * struct iscsi_param->phase
+ */
+#define PHASE_SECURITY 0x01
+#define PHASE_OPERATIONAL 0x02
+#define PHASE_DECLARATIVE 0x04
+#define PHASE_FFP0 0x08
+
+#define IS_PHASE_SECURITY(p) ((p)->phase & PHASE_SECURITY)
+#define IS_PHASE_OPERATIONAL(p) ((p)->phase & PHASE_OPERATIONAL)
+#define IS_PHASE_DECLARATIVE(p) ((p)->phase & PHASE_DECLARATIVE)
+#define IS_PHASE_FFP0(p) ((p)->phase & PHASE_FFP0)
+
+/*
+ * struct iscsi_param->type
+ */
+#define TYPE_BOOL_AND 0x01
+#define TYPE_BOOL_OR 0x02
+#define TYPE_NUMBER 0x04
+#define TYPE_NUMBER_RANGE 0x08
+#define TYPE_STRING 0x10
+#define TYPE_VALUE_LIST 0x20
+
+#define IS_TYPE_BOOL_AND(p) ((p)->type & TYPE_BOOL_AND)
+#define IS_TYPE_BOOL_OR(p) ((p)->type & TYPE_BOOL_OR)
+#define IS_TYPE_NUMBER(p) ((p)->type & TYPE_NUMBER)
+#define IS_TYPE_NUMBER_RANGE(p) ((p)->type & TYPE_NUMBER_RANGE)
+#define IS_TYPE_STRING(p) ((p)->type & TYPE_STRING)
+#define IS_TYPE_VALUE_LIST(p) ((p)->type & TYPE_VALUE_LIST)
+
+/*
+ * struct iscsi_param->type_range
+ */
+#define TYPERANGE_BOOL_AND 0x0001
+#define TYPERANGE_BOOL_OR 0x0002
+#define TYPERANGE_0_TO_2 0x0004
+#define TYPERANGE_0_TO_3600 0x0008
+#define TYPERANGE_0_TO_32767 0x0010
+#define TYPERANGE_0_TO_65535 0x0020
+#define TYPERANGE_1_TO_65535 0x0040
+#define TYPERANGE_2_TO_3600 0x0080
+#define TYPERANGE_512_TO_16777215 0x0100
+#define TYPERANGE_AUTH 0x0200
+#define TYPERANGE_DIGEST 0x0400
+#define TYPERANGE_ISCSINAME 0x0800
+#define TYPERANGE_MARKINT 0x1000
+#define TYPERANGE_SESSIONTYPE 0x2000
+#define TYPERANGE_TARGETADDRESS 0x4000
+#define TYPERANGE_UTF8 0x8000
+
+#define IS_TYPERANGE_0_TO_2(p) ((p)->type_range & TYPERANGE_0_TO_2)
+#define IS_TYPERANGE_0_TO_3600(p) ((p)->type_range & TYPERANGE_0_TO_3600)
+#define IS_TYPERANGE_0_TO_32767(p) ((p)->type_range & TYPERANGE_0_TO_32767)
+#define IS_TYPERANGE_0_TO_65535(p) ((p)->type_range & TYPERANGE_0_TO_65535)
+#define IS_TYPERANGE_1_TO_65535(p) ((p)->type_range & TYPERANGE_1_TO_65535)
+#define IS_TYPERANGE_2_TO_3600(p) ((p)->type_range & TYPERANGE_2_TO_3600)
+#define IS_TYPERANGE_512_TO_16777215(p) ((p)->type_range & \
+ TYPERANGE_512_TO_16777215)
+#define IS_TYPERANGE_AUTH_PARAM(p) ((p)->type_range & TYPERANGE_AUTH)
+#define IS_TYPERANGE_DIGEST_PARAM(p) ((p)->type_range & TYPERANGE_DIGEST)
+#define IS_TYPERANGE_SESSIONTYPE(p) ((p)->type_range & \
+ TYPERANGE_SESSIONTYPE)
+
+/*
+ * struct iscsi_param->state
+ */
+#define PSTATE_ACCEPTOR 0x01
+#define PSTATE_NEGOTIATE 0x02
+#define PSTATE_PROPOSER 0x04
+#define PSTATE_IRRELEVANT 0x08
+#define PSTATE_REJECT 0x10
+#define PSTATE_REPLY_OPTIONAL 0x20
+#define PSTATE_RESPONSE_GOT 0x40
+#define PSTATE_RESPONSE_SENT 0x80
+
+#define IS_PSTATE_ACCEPTOR(p) ((p)->state & PSTATE_ACCEPTOR)
+#define IS_PSTATE_NEGOTIATE(p) ((p)->state & PSTATE_NEGOTIATE)
+#define IS_PSTATE_PROPOSER(p) ((p)->state & PSTATE_PROPOSER)
+#define IS_PSTATE_IRRELEVANT(p) ((p)->state & PSTATE_IRRELEVANT)
+#define IS_PSTATE_REJECT(p) ((p)->state & PSTATE_REJECT)
+#define IS_PSTATE_REPLY_OPTIONAL(p) ((p)->state & PSTATE_REPLY_OPTIONAL)
+#define IS_PSTATE_RESPONSE_GOT(p) ((p)->state & PSTATE_RESPONSE_GOT)
+#define IS_PSTATE_RESPONSE_SENT(p) ((p)->state & PSTATE_RESPONSE_SENT)
+
+#define SET_PSTATE_ACCEPTOR(p) ((p)->state |= PSTATE_ACCEPTOR)
+#define SET_PSTATE_NEGOTIATE(p) ((p)->state |= PSTATE_NEGOTIATE)
+#define SET_PSTATE_PROPOSER(p) ((p)->state |= PSTATE_PROPOSER)
+#define SET_PSTATE_IRRELEVANT(p) ((p)->state |= PSTATE_IRRELEVANT)
+#define SET_PSTATE_REJECT(p) ((p)->state |= PSTATE_REJECT)
+#define SET_PSTATE_REPLY_OPTIONAL(p) ((p)->state |= PSTATE_REPLY_OPTIONAL)
+#define SET_PSTATE_RESPONSE_GOT(p) ((p)->state |= PSTATE_RESPONSE_GOT)
+#define SET_PSTATE_RESPONSE_SENT(p) ((p)->state |= PSTATE_RESPONSE_SENT)
+
+#endif /* ISCSI_PARAMETERS_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
new file mode 100644
index 0000000..fc69408
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
@@ -0,0 +1,664 @@
+/*******************************************************************************
+ * This file contains main functions related to iSCSI DataSequenceInOrder=No
+ * and DataPDUInOrder=No.
+ *
+ \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/slab.h>
+#include <linux/random.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_seq_pdu_list.h"
+
+#define OFFLOAD_BUF_SIZE 32768
+
+void iscsit_dump_seq_list(struct iscsi_cmd *cmd)
+{
+ int i;
+ struct iscsi_seq *seq;
+
+ pr_debug("Dumping Sequence List for ITT: 0x%08x:\n",
+ cmd->init_task_tag);
+
+ for (i = 0; i < cmd->seq_count; i++) {
+ seq = &cmd->seq_list[i];
+ pr_debug("i: %d, pdu_start: %d, pdu_count: %d,"
+ " offset: %d, xfer_len: %d, seq_send_order: %d,"
+ " seq_no: %d\n", i, seq->pdu_start, seq->pdu_count,
+ seq->offset, seq->xfer_len, seq->seq_send_order,
+ seq->seq_no);
+ }
+}
+
+void iscsit_dump_pdu_list(struct iscsi_cmd *cmd)
+{
+ int i;
+ struct iscsi_pdu *pdu;
+
+ pr_debug("Dumping PDU List for ITT: 0x%08x:\n",
+ cmd->init_task_tag);
+
+ for (i = 0; i < cmd->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i];
+ pr_debug("i: %d, offset: %d, length: %d,"
+ " pdu_send_order: %d, seq_no: %d\n", i, pdu->offset,
+ pdu->length, pdu->pdu_send_order, pdu->seq_no);
+ }
+}
+
+static void iscsit_ordered_seq_lists(
+ struct iscsi_cmd *cmd,
+ u8 type)
+{
+ u32 i, seq_count = 0;
+
+ for (i = 0; i < cmd->seq_count; i++) {
+ if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
+ continue;
+ cmd->seq_list[i].seq_send_order = seq_count++;
+ }
+}
+
+static void iscsit_ordered_pdu_lists(
+ struct iscsi_cmd *cmd,
+ u8 type)
+{
+ u32 i, pdu_send_order = 0, seq_no = 0;
+
+ for (i = 0; i < cmd->pdu_count; i++) {
+redo:
+ if (cmd->pdu_list[i].seq_no == seq_no) {
+ cmd->pdu_list[i].pdu_send_order = pdu_send_order++;
+ continue;
+ }
+ seq_no++;
+ pdu_send_order = 0;
+ goto redo;
+ }
+}
+
+/*
+ * Generate count random values into array.
+ * Use 0x80000000 to mark generates valued in array[].
+ */
+static void iscsit_create_random_array(u32 *array, u32 count)
+{
+ int i, j, k;
+
+ if (count == 1) {
+ array[0] = 0;
+ return;
+ }
+
+ for (i = 0; i < count; i++) {
+redo:
+ get_random_bytes(&j, sizeof(u32));
+ j = (1 + (int) (9999 + 1) - j) % count;
+ for (k = 0; k < i + 1; k++) {
+ j |= 0x80000000;
+ if ((array[k] & 0x80000000) && (array[k] == j))
+ goto redo;
+ }
+ array[i] = j;
+ }
+
+ for (i = 0; i < count; i++)
+ array[i] &= ~0x80000000;
+}
+
+static int iscsit_randomize_pdu_lists(
+ struct iscsi_cmd *cmd,
+ u8 type)
+{
+ int i = 0;
+ u32 *array, pdu_count, seq_count = 0, seq_no = 0, seq_offset = 0;
+
+ for (pdu_count = 0; pdu_count < cmd->pdu_count; pdu_count++) {
+redo:
+ if (cmd->pdu_list[pdu_count].seq_no == seq_no) {
+ seq_count++;
+ continue;
+ }
+ array = kzalloc(seq_count * sizeof(u32), GFP_KERNEL);
+ if (!array) {
+ pr_err("Unable to allocate memory"
+ " for random array.\n");
+ return -1;
+ }
+ iscsit_create_random_array(array, seq_count);
+
+ for (i = 0; i < seq_count; i++)
+ cmd->pdu_list[seq_offset+i].pdu_send_order = array[i];
+
+ kfree(array);
+
+ seq_offset += seq_count;
+ seq_count = 0;
+ seq_no++;
+ goto redo;
+ }
+
+ if (seq_count) {
+ array = kzalloc(seq_count * sizeof(u32), GFP_KERNEL);
+ if (!array) {
+ pr_err("Unable to allocate memory for"
+ " random array.\n");
+ return -1;
+ }
+ iscsit_create_random_array(array, seq_count);
+
+ for (i = 0; i < seq_count; i++)
+ cmd->pdu_list[seq_offset+i].pdu_send_order = array[i];
+
+ kfree(array);
+ }
+
+ return 0;
+}
+
+static int iscsit_randomize_seq_lists(
+ struct iscsi_cmd *cmd,
+ u8 type)
+{
+ int i, j = 0;
+ u32 *array, seq_count = cmd->seq_count;
+
+ if ((type == PDULIST_IMMEDIATE) || (type == PDULIST_UNSOLICITED))
+ seq_count--;
+ else if (type == PDULIST_IMMEDIATE_AND_UNSOLICITED)
+ seq_count -= 2;
+
+ if (!seq_count)
+ return 0;
+
+ array = kzalloc(seq_count * sizeof(u32), GFP_KERNEL);
+ if (!array) {
+ pr_err("Unable to allocate memory for random array.\n");
+ return -1;
+ }
+ iscsit_create_random_array(array, seq_count);
+
+ for (i = 0; i < cmd->seq_count; i++) {
+ if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
+ continue;
+ cmd->seq_list[i].seq_send_order = array[j++];
+ }
+
+ kfree(array);
+ return 0;
+}
+
+static void iscsit_determine_counts_for_list(
+ struct iscsi_cmd *cmd,
+ struct iscsi_build_list *bl,
+ u32 *seq_count,
+ u32 *pdu_count)
+{
+ int check_immediate = 0;
+ u32 burstlength = 0, offset = 0;
+ u32 unsolicited_data_length = 0;
+ struct iscsi_conn *conn = cmd->conn;
+
+ if ((bl->type == PDULIST_IMMEDIATE) ||
+ (bl->type == PDULIST_IMMEDIATE_AND_UNSOLICITED))
+ check_immediate = 1;
+
+ if ((bl->type == PDULIST_UNSOLICITED) ||
+ (bl->type == PDULIST_IMMEDIATE_AND_UNSOLICITED))
+ unsolicited_data_length = (cmd->data_length >
+ conn->sess->sess_ops->FirstBurstLength) ?
+ conn->sess->sess_ops->FirstBurstLength : cmd->data_length;
+
+ while (offset < cmd->data_length) {
+ *pdu_count += 1;
+
+ if (check_immediate) {
+ check_immediate = 0;
+ offset += bl->immediate_data_length;
+ *seq_count += 1;
+ if (unsolicited_data_length)
+ unsolicited_data_length -=
+ bl->immediate_data_length;
+ continue;
+ }
+ if (unsolicited_data_length > 0) {
+ if ((offset + conn->conn_ops->MaxRecvDataSegmentLength)
+ >= cmd->data_length) {
+ unsolicited_data_length -=
+ (cmd->data_length - offset);
+ offset += (cmd->data_length - offset);
+ continue;
+ }
+ if ((offset + conn->conn_ops->MaxRecvDataSegmentLength)
+ >= conn->sess->sess_ops->FirstBurstLength) {
+ unsolicited_data_length -=
+ (conn->sess->sess_ops->FirstBurstLength -
+ offset);
+ offset += (conn->sess->sess_ops->FirstBurstLength -
+ offset);
+ burstlength = 0;
+ *seq_count += 1;
+ continue;
+ }
+
+ offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ unsolicited_data_length -=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ continue;
+ }
+ if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ cmd->data_length) {
+ offset += (cmd->data_length - offset);
+ continue;
+ }
+ if ((burstlength + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ conn->sess->sess_ops->MaxBurstLength) {
+ offset += (conn->sess->sess_ops->MaxBurstLength -
+ burstlength);
+ burstlength = 0;
+ *seq_count += 1;
+ continue;
+ }
+
+ burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
+ offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ }
+}
+
+
+/*
+ * Builds PDU and/or Sequence list, called while DataSequenceInOrder=No
+ * and DataPDUInOrder=No.
+ */
+static int iscsit_build_pdu_and_seq_list(
+ struct iscsi_cmd *cmd,
+ struct iscsi_build_list *bl)
+{
+ int check_immediate = 0, datapduinorder, datasequenceinorder;
+ u32 burstlength = 0, offset = 0, i = 0;
+ u32 pdu_count = 0, seq_no = 0, unsolicited_data_length = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *pdu = cmd->pdu_list;
+ struct iscsi_seq *seq = cmd->seq_list;
+
+ datapduinorder = conn->sess->sess_ops->DataPDUInOrder;
+ datasequenceinorder = conn->sess->sess_ops->DataSequenceInOrder;
+
+ if ((bl->type == PDULIST_IMMEDIATE) ||
+ (bl->type == PDULIST_IMMEDIATE_AND_UNSOLICITED))
+ check_immediate = 1;
+
+ if ((bl->type == PDULIST_UNSOLICITED) ||
+ (bl->type == PDULIST_IMMEDIATE_AND_UNSOLICITED))
+ unsolicited_data_length = (cmd->data_length >
+ conn->sess->sess_ops->FirstBurstLength) ?
+ conn->sess->sess_ops->FirstBurstLength : cmd->data_length;
+
+ while (offset < cmd->data_length) {
+ pdu_count++;
+ if (!datapduinorder) {
+ pdu[i].offset = offset;
+ pdu[i].seq_no = seq_no;
+ }
+ if (!datasequenceinorder && (pdu_count == 1)) {
+ seq[seq_no].pdu_start = i;
+ seq[seq_no].seq_no = seq_no;
+ seq[seq_no].offset = offset;
+ seq[seq_no].orig_offset = offset;
+ }
+
+ if (check_immediate) {
+ check_immediate = 0;
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_IMMEDIATE;
+ pdu[i++].length = bl->immediate_data_length;
+ }
+ if (!datasequenceinorder) {
+ seq[seq_no].type = SEQTYPE_IMMEDIATE;
+ seq[seq_no].pdu_count = 1;
+ seq[seq_no].xfer_len =
+ bl->immediate_data_length;
+ }
+ offset += bl->immediate_data_length;
+ pdu_count = 0;
+ seq_no++;
+ if (unsolicited_data_length)
+ unsolicited_data_length -=
+ bl->immediate_data_length;
+ continue;
+ }
+ if (unsolicited_data_length > 0) {
+ if ((offset +
+ conn->conn_ops->MaxRecvDataSegmentLength) >=
+ cmd->data_length) {
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_UNSOLICITED;
+ pdu[i].length =
+ (cmd->data_length - offset);
+ }
+ if (!datasequenceinorder) {
+ seq[seq_no].type = SEQTYPE_UNSOLICITED;
+ seq[seq_no].pdu_count = pdu_count;
+ seq[seq_no].xfer_len = (burstlength +
+ (cmd->data_length - offset));
+ }
+ unsolicited_data_length -=
+ (cmd->data_length - offset);
+ offset += (cmd->data_length - offset);
+ continue;
+ }
+ if ((offset +
+ conn->conn_ops->MaxRecvDataSegmentLength) >=
+ conn->sess->sess_ops->FirstBurstLength) {
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_UNSOLICITED;
+ pdu[i++].length =
+ (conn->sess->sess_ops->FirstBurstLength -
+ offset);
+ }
+ if (!datasequenceinorder) {
+ seq[seq_no].type = SEQTYPE_UNSOLICITED;
+ seq[seq_no].pdu_count = pdu_count;
+ seq[seq_no].xfer_len = (burstlength +
+ (conn->sess->sess_ops->FirstBurstLength -
+ offset));
+ }
+ unsolicited_data_length -=
+ (conn->sess->sess_ops->FirstBurstLength -
+ offset);
+ offset += (conn->sess->sess_ops->FirstBurstLength -
+ offset);
+ burstlength = 0;
+ pdu_count = 0;
+ seq_no++;
+ continue;
+ }
+
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_UNSOLICITED;
+ pdu[i++].length =
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ }
+ burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
+ offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ unsolicited_data_length -=
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ continue;
+ }
+ if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ cmd->data_length) {
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_NORMAL;
+ pdu[i].length = (cmd->data_length - offset);
+ }
+ if (!datasequenceinorder) {
+ seq[seq_no].type = SEQTYPE_NORMAL;
+ seq[seq_no].pdu_count = pdu_count;
+ seq[seq_no].xfer_len = (burstlength +
+ (cmd->data_length - offset));
+ }
+ offset += (cmd->data_length - offset);
+ continue;
+ }
+ if ((burstlength + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ conn->sess->sess_ops->MaxBurstLength) {
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_NORMAL;
+ pdu[i++].length =
+ (conn->sess->sess_ops->MaxBurstLength -
+ burstlength);
+ }
+ if (!datasequenceinorder) {
+ seq[seq_no].type = SEQTYPE_NORMAL;
+ seq[seq_no].pdu_count = pdu_count;
+ seq[seq_no].xfer_len = (burstlength +
+ (conn->sess->sess_ops->MaxBurstLength -
+ burstlength));
+ }
+ offset += (conn->sess->sess_ops->MaxBurstLength -
+ burstlength);
+ burstlength = 0;
+ pdu_count = 0;
+ seq_no++;
+ continue;
+ }
+
+ if (!datapduinorder) {
+ pdu[i].type = PDUTYPE_NORMAL;
+ pdu[i++].length =
+ conn->conn_ops->MaxRecvDataSegmentLength;
+ }
+ burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
+ offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ }
+
+ if (!datasequenceinorder) {
+ if (bl->data_direction & ISCSI_PDU_WRITE) {
+ if (bl->randomize & RANDOM_R2T_OFFSETS) {
+ if (iscsit_randomize_seq_lists(cmd, bl->type)
+ < 0)
+ return -1;
+ } else
+ iscsit_ordered_seq_lists(cmd, bl->type);
+ } else if (bl->data_direction & ISCSI_PDU_READ) {
+ if (bl->randomize & RANDOM_DATAIN_SEQ_OFFSETS) {
+ if (iscsit_randomize_seq_lists(cmd, bl->type)
+ < 0)
+ return -1;
+ } else
+ iscsit_ordered_seq_lists(cmd, bl->type);
+ }
+#if 0
+ iscsit_dump_seq_list(cmd);
+#endif
+ }
+ if (!datapduinorder) {
+ if (bl->data_direction & ISCSI_PDU_WRITE) {
+ if (bl->randomize & RANDOM_DATAOUT_PDU_OFFSETS) {
+ if (iscsit_randomize_pdu_lists(cmd, bl->type)
+ < 0)
+ return -1;
+ } else
+ iscsit_ordered_pdu_lists(cmd, bl->type);
+ } else if (bl->data_direction & ISCSI_PDU_READ) {
+ if (bl->randomize & RANDOM_DATAIN_PDU_OFFSETS) {
+ if (iscsit_randomize_pdu_lists(cmd, bl->type)
+ < 0)
+ return -1;
+ } else
+ iscsit_ordered_pdu_lists(cmd, bl->type);
+ }
+#if 0
+ iscsit_dump_pdu_list(cmd);
+#endif
+ }
+
+ return 0;
+}
+
+/*
+ * Only called while DataSequenceInOrder=No or DataPDUInOrder=No.
+ */
+int iscsit_do_build_list(
+ struct iscsi_cmd *cmd,
+ struct iscsi_build_list *bl)
+{
+ u32 pdu_count = 0, seq_count = 1;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *pdu = NULL;
+ struct iscsi_seq *seq = NULL;
+
+ iscsit_determine_counts_for_list(cmd, bl, &seq_count, &pdu_count);
+
+ if (!conn->sess->sess_ops->DataSequenceInOrder) {
+ seq = kzalloc(seq_count * sizeof(struct iscsi_seq), GFP_ATOMIC);
+ if (!seq) {
+ pr_err("Unable to allocate struct iscsi_seq list\n");
+ return -1;
+ }
+ cmd->seq_list = seq;
+ cmd->seq_count = seq_count;
+ }
+
+ if (!conn->sess->sess_ops->DataPDUInOrder) {
+ pdu = kzalloc(pdu_count * sizeof(struct iscsi_pdu), GFP_ATOMIC);
+ if (!pdu) {
+ pr_err("Unable to allocate struct iscsi_pdu list.\n");
+ kfree(seq);
+ return -1;
+ }
+ cmd->pdu_list = pdu;
+ cmd->pdu_count = pdu_count;
+ }
+
+ return iscsit_build_pdu_and_seq_list(cmd, bl);
+}
+
+struct iscsi_pdu *iscsit_get_pdu_holder(
+ struct iscsi_cmd *cmd,
+ u32 offset,
+ u32 length)
+{
+ u32 i;
+ struct iscsi_pdu *pdu = NULL;
+
+ if (!cmd->pdu_list) {
+ pr_err("struct iscsi_cmd->pdu_list is NULL!\n");
+ return NULL;
+ }
+
+ pdu = &cmd->pdu_list[0];
+
+ for (i = 0; i < cmd->pdu_count; i++)
+ if ((pdu[i].offset == offset) && (pdu[i].length == length))
+ return &pdu[i];
+
+ pr_err("Unable to locate PDU holder for ITT: 0x%08x, Offset:"
+ " %u, Length: %u\n", cmd->init_task_tag, offset, length);
+ return NULL;
+}
+
+struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(
+ struct iscsi_cmd *cmd,
+ struct iscsi_seq *seq)
+{
+ u32 i;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_pdu *pdu = NULL;
+
+ if (!cmd->pdu_list) {
+ pr_err("struct iscsi_cmd->pdu_list is NULL!\n");
+ return NULL;
+ }
+
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+redo:
+ pdu = &cmd->pdu_list[cmd->pdu_start];
+
+ for (i = 0; pdu[i].seq_no != cmd->seq_no; i++) {
+#if 0
+ pr_debug("pdu[i].seq_no: %d, pdu[i].pdu"
+ "_send_order: %d, pdu[i].offset: %d,"
+ " pdu[i].length: %d\n", pdu[i].seq_no,
+ pdu[i].pdu_send_order, pdu[i].offset,
+ pdu[i].length);
+#endif
+ if (pdu[i].pdu_send_order == cmd->pdu_send_order) {
+ cmd->pdu_send_order++;
+ return &pdu[i];
+ }
+ }
+
+ cmd->pdu_start += cmd->pdu_send_order;
+ cmd->pdu_send_order = 0;
+ cmd->seq_no++;
+
+ if (cmd->pdu_start < cmd->pdu_count)
+ goto redo;
+
+ pr_err("Command ITT: 0x%08x unable to locate"
+ " struct iscsi_pdu for cmd->pdu_send_order: %u.\n",
+ cmd->init_task_tag, cmd->pdu_send_order);
+ return NULL;
+ } else {
+ if (!seq) {
+ pr_err("struct iscsi_seq is NULL!\n");
+ return NULL;
+ }
+#if 0
+ pr_debug("seq->pdu_start: %d, seq->pdu_count: %d,"
+ " seq->seq_no: %d\n", seq->pdu_start, seq->pdu_count,
+ seq->seq_no);
+#endif
+ pdu = &cmd->pdu_list[seq->pdu_start];
+
+ if (seq->pdu_send_order == seq->pdu_count) {
+ pr_err("Command ITT: 0x%08x seq->pdu_send"
+ "_order: %u equals seq->pdu_count: %u\n",
+ cmd->init_task_tag, seq->pdu_send_order,
+ seq->pdu_count);
+ return NULL;
+ }
+
+ for (i = 0; i < seq->pdu_count; i++) {
+ if (pdu[i].pdu_send_order == seq->pdu_send_order) {
+ seq->pdu_send_order++;
+ return &pdu[i];
+ }
+ }
+
+ pr_err("Command ITT: 0x%08x unable to locate iscsi"
+ "_pdu_t for seq->pdu_send_order: %u.\n",
+ cmd->init_task_tag, seq->pdu_send_order);
+ return NULL;
+ }
+
+ return NULL;
+}
+
+struct iscsi_seq *iscsit_get_seq_holder(
+ struct iscsi_cmd *cmd,
+ u32 offset,
+ u32 length)
+{
+ u32 i;
+
+ if (!cmd->seq_list) {
+ pr_err("struct iscsi_cmd->seq_list is NULL!\n");
+ return NULL;
+ }
+
+ for (i = 0; i < cmd->seq_count; i++) {
+#if 0
+ pr_debug("seq_list[i].orig_offset: %d, seq_list[i]."
+ "xfer_len: %d, seq_list[i].seq_no %u\n",
+ cmd->seq_list[i].orig_offset, cmd->seq_list[i].xfer_len,
+ cmd->seq_list[i].seq_no);
+#endif
+ if ((cmd->seq_list[i].orig_offset +
+ cmd->seq_list[i].xfer_len) >=
+ (offset + length))
+ return &cmd->seq_list[i];
+ }
+
+ pr_err("Unable to locate Sequence holder for ITT: 0x%08x,"
+ " Offset: %u, Length: %u\n", cmd->init_task_tag, offset,
+ length);
+ return NULL;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.h
new file mode 100644
index 0000000..0d52a10
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_seq_pdu_list.h
@@ -0,0 +1,86 @@
+#ifndef ISCSI_SEQ_AND_PDU_LIST_H
+#define ISCSI_SEQ_AND_PDU_LIST_H
+
+/* struct iscsi_pdu->status */
+#define DATAOUT_PDU_SENT 1
+
+/* struct iscsi_seq->type */
+#define SEQTYPE_IMMEDIATE 1
+#define SEQTYPE_UNSOLICITED 2
+#define SEQTYPE_NORMAL 3
+
+/* struct iscsi_seq->status */
+#define DATAOUT_SEQUENCE_GOT_R2T 1
+#define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2
+#define DATAOUT_SEQUENCE_COMPLETE 3
+
+/* iscsi_determine_counts_for_list() type */
+#define PDULIST_NORMAL 1
+#define PDULIST_IMMEDIATE 2
+#define PDULIST_UNSOLICITED 3
+#define PDULIST_IMMEDIATE_AND_UNSOLICITED 4
+
+/* struct iscsi_pdu->type */
+#define PDUTYPE_IMMEDIATE 1
+#define PDUTYPE_UNSOLICITED 2
+#define PDUTYPE_NORMAL 3
+
+/* struct iscsi_pdu->status */
+#define ISCSI_PDU_NOT_RECEIVED 0
+#define ISCSI_PDU_RECEIVED_OK 1
+#define ISCSI_PDU_CRC_FAILED 2
+#define ISCSI_PDU_TIMED_OUT 3
+
+/* struct iscsi_build_list->randomize */
+#define RANDOM_DATAIN_PDU_OFFSETS 0x01
+#define RANDOM_DATAIN_SEQ_OFFSETS 0x02
+#define RANDOM_DATAOUT_PDU_OFFSETS 0x04
+#define RANDOM_R2T_OFFSETS 0x08
+
+/* struct iscsi_build_list->data_direction */
+#define ISCSI_PDU_READ 0x01
+#define ISCSI_PDU_WRITE 0x02
+
+struct iscsi_build_list {
+ int data_direction;
+ int randomize;
+ int type;
+ int immediate_data_length;
+};
+
+struct iscsi_pdu {
+ int status;
+ int type;
+ u8 flags;
+ u32 data_sn;
+ u32 length;
+ u32 offset;
+ u32 pdu_send_order;
+ u32 seq_no;
+} ____cacheline_aligned;
+
+struct iscsi_seq {
+ int sent;
+ int status;
+ int type;
+ u32 data_sn;
+ u32 first_datasn;
+ u32 last_datasn;
+ u32 next_burst_len;
+ u32 pdu_start;
+ u32 pdu_count;
+ u32 offset;
+ u32 orig_offset;
+ u32 pdu_send_order;
+ u32 r2t_sn;
+ u32 seq_send_order;
+ u32 seq_no;
+ u32 xfer_len;
+} ____cacheline_aligned;
+
+extern int iscsit_do_build_list(struct iscsi_cmd *, struct iscsi_build_list *);
+extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
+extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
+extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);
+
+#endif /* ISCSI_SEQ_AND_PDU_LIST_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.c
new file mode 100644
index 0000000..421d694
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.c
@@ -0,0 +1,950 @@
+/*******************************************************************************
+ * Modern ConfigFS group context specific iSCSI statistics based on original
+ * iscsi_target_mib.c code
+ *
+ * Copyright (c) 2011 Rising Tide Systems
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/configfs.h>
+#include <linux/export.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/configfs_macros.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target_stat.h"
+
+#ifndef INITIAL_JIFFIES
+#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
+#endif
+
+/* Instance Attributes Table */
+#define ISCSI_INST_NUM_NODES 1
+#define ISCSI_INST_DESCR "Storage Engine Target"
+#define ISCSI_INST_LAST_FAILURE_TYPE 0
+#define ISCSI_DISCONTINUITY_TIME 0
+
+#define ISCSI_NODE_INDEX 1
+
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+/****************************************************************************
+ * iSCSI MIB Tables
+ ****************************************************************************/
+/*
+ * Instance Attributes Table
+ */
+CONFIGFS_EATTR_STRUCT(iscsi_stat_instance, iscsi_wwn_stat_grps);
+#define ISCSI_STAT_INSTANCE_ATTR(_name, _mode) \
+static struct iscsi_stat_instance_attribute \
+ iscsi_stat_instance_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_instance_show_attr_##_name, \
+ iscsi_stat_instance_store_attr_##_name);
+
+#define ISCSI_STAT_INSTANCE_ATTR_RO(_name) \
+static struct iscsi_stat_instance_attribute \
+ iscsi_stat_instance_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_instance_show_attr_##_name);
+
+static ssize_t iscsi_stat_instance_show_attr_inst(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(inst);
+
+static ssize_t iscsi_stat_instance_show_attr_min_ver(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_DRAFT20_VERSION);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(min_ver);
+
+static ssize_t iscsi_stat_instance_show_attr_max_ver(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_DRAFT20_VERSION);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(max_ver);
+
+static ssize_t iscsi_stat_instance_show_attr_portals(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_num_tpg_nps);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(portals);
+
+static ssize_t iscsi_stat_instance_show_attr_nodes(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_INST_NUM_NODES);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(nodes);
+
+static ssize_t iscsi_stat_instance_show_attr_sessions(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_nsessions);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(sessions);
+
+static ssize_t iscsi_stat_instance_show_attr_fail_sess(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+ u32 sess_err_count;
+
+ spin_lock_bh(&sess_err->lock);
+ sess_err_count = (sess_err->digest_errors +
+ sess_err->cxn_timeout_errors +
+ sess_err->pdu_format_errors);
+ spin_unlock_bh(&sess_err->lock);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", sess_err_count);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(fail_sess);
+
+static ssize_t iscsi_stat_instance_show_attr_fail_type(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n",
+ sess_err->last_sess_failure_type);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(fail_type);
+
+static ssize_t iscsi_stat_instance_show_attr_fail_rem_name(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+
+ return snprintf(page, PAGE_SIZE, "%s\n",
+ sess_err->last_sess_fail_rem_name[0] ?
+ sess_err->last_sess_fail_rem_name : NONE);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(fail_rem_name);
+
+static ssize_t iscsi_stat_instance_show_attr_disc_time(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_DISCONTINUITY_TIME);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(disc_time);
+
+static ssize_t iscsi_stat_instance_show_attr_description(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%s\n", ISCSI_INST_DESCR);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(description);
+
+static ssize_t iscsi_stat_instance_show_attr_vendor(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "RisingTide Systems iSCSI-Target\n");
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(vendor);
+
+static ssize_t iscsi_stat_instance_show_attr_version(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%s\n", ISCSIT_VERSION);
+}
+ISCSI_STAT_INSTANCE_ATTR_RO(version);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_instance, iscsi_wwn_stat_grps,
+ iscsi_instance_group);
+
+static struct configfs_attribute *iscsi_stat_instance_attrs[] = {
+ &iscsi_stat_instance_inst.attr,
+ &iscsi_stat_instance_min_ver.attr,
+ &iscsi_stat_instance_max_ver.attr,
+ &iscsi_stat_instance_portals.attr,
+ &iscsi_stat_instance_nodes.attr,
+ &iscsi_stat_instance_sessions.attr,
+ &iscsi_stat_instance_fail_sess.attr,
+ &iscsi_stat_instance_fail_type.attr,
+ &iscsi_stat_instance_fail_rem_name.attr,
+ &iscsi_stat_instance_disc_time.attr,
+ &iscsi_stat_instance_description.attr,
+ &iscsi_stat_instance_vendor.attr,
+ &iscsi_stat_instance_version.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_instance_item_ops = {
+ .show_attribute = iscsi_stat_instance_attr_show,
+ .store_attribute = iscsi_stat_instance_attr_store,
+};
+
+struct config_item_type iscsi_stat_instance_cit = {
+ .ct_item_ops = &iscsi_stat_instance_item_ops,
+ .ct_attrs = iscsi_stat_instance_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Instance Session Failure Stats Table
+ */
+CONFIGFS_EATTR_STRUCT(iscsi_stat_sess_err, iscsi_wwn_stat_grps);
+#define ISCSI_STAT_SESS_ERR_ATTR(_name, _mode) \
+static struct iscsi_stat_sess_err_attribute \
+ iscsi_stat_sess_err_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_sess_err_show_attr_##_name, \
+ iscsi_stat_sess_err_store_attr_##_name);
+
+#define ISCSI_STAT_SESS_ERR_ATTR_RO(_name) \
+static struct iscsi_stat_sess_err_attribute \
+ iscsi_stat_sess_err_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_sess_err_show_attr_##_name);
+
+static ssize_t iscsi_stat_sess_err_show_attr_inst(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_SESS_ERR_ATTR_RO(inst);
+
+static ssize_t iscsi_stat_sess_err_show_attr_digest_errors(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", sess_err->digest_errors);
+}
+ISCSI_STAT_SESS_ERR_ATTR_RO(digest_errors);
+
+static ssize_t iscsi_stat_sess_err_show_attr_cxn_errors(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", sess_err->cxn_timeout_errors);
+}
+ISCSI_STAT_SESS_ERR_ATTR_RO(cxn_errors);
+
+static ssize_t iscsi_stat_sess_err_show_attr_format_errors(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_sess_err_stats *sess_err = &tiqn->sess_err_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", sess_err->pdu_format_errors);
+}
+ISCSI_STAT_SESS_ERR_ATTR_RO(format_errors);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_sess_err, iscsi_wwn_stat_grps,
+ iscsi_sess_err_group);
+
+static struct configfs_attribute *iscsi_stat_sess_err_attrs[] = {
+ &iscsi_stat_sess_err_inst.attr,
+ &iscsi_stat_sess_err_digest_errors.attr,
+ &iscsi_stat_sess_err_cxn_errors.attr,
+ &iscsi_stat_sess_err_format_errors.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_sess_err_item_ops = {
+ .show_attribute = iscsi_stat_sess_err_attr_show,
+ .store_attribute = iscsi_stat_sess_err_attr_store,
+};
+
+struct config_item_type iscsi_stat_sess_err_cit = {
+ .ct_item_ops = &iscsi_stat_sess_err_item_ops,
+ .ct_attrs = iscsi_stat_sess_err_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Target Attributes Table
+ */
+CONFIGFS_EATTR_STRUCT(iscsi_stat_tgt_attr, iscsi_wwn_stat_grps);
+#define ISCSI_STAT_TGT_ATTR(_name, _mode) \
+static struct iscsi_stat_tgt_attr_attribute \
+ iscsi_stat_tgt_attr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_tgt-attr_show_attr_##_name, \
+ iscsi_stat_tgt_attr_store_attr_##_name);
+
+#define ISCSI_STAT_TGT_ATTR_RO(_name) \
+static struct iscsi_stat_tgt_attr_attribute \
+ iscsi_stat_tgt_attr_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_tgt_attr_show_attr_##_name);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_inst(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_TGT_ATTR_RO(inst);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_indx(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_NODE_INDEX);
+}
+ISCSI_STAT_TGT_ATTR_RO(indx);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_login_fails(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ u32 fail_count;
+
+ spin_lock(&lstat->lock);
+ fail_count = (lstat->redirects + lstat->authorize_fails +
+ lstat->authenticate_fails + lstat->negotiate_fails +
+ lstat->other_fails);
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", fail_count);
+}
+ISCSI_STAT_TGT_ATTR_RO(login_fails);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_last_fail_time(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ u32 last_fail_time;
+
+ spin_lock(&lstat->lock);
+ last_fail_time = lstat->last_fail_time ?
+ (u32)(((u32)lstat->last_fail_time -
+ INITIAL_JIFFIES) * 100 / HZ) : 0;
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", last_fail_time);
+}
+ISCSI_STAT_TGT_ATTR_RO(last_fail_time);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_last_fail_type(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ u32 last_fail_type;
+
+ spin_lock(&lstat->lock);
+ last_fail_type = lstat->last_fail_type;
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", last_fail_type);
+}
+ISCSI_STAT_TGT_ATTR_RO(last_fail_type);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_fail_intr_name(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ unsigned char buf[224];
+
+ spin_lock(&lstat->lock);
+ snprintf(buf, 224, "%s", lstat->last_intr_fail_name[0] ?
+ lstat->last_intr_fail_name : NONE);
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%s\n", buf);
+}
+ISCSI_STAT_TGT_ATTR_RO(fail_intr_name);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_fail_intr_addr_type(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ unsigned char buf[8];
+
+ spin_lock(&lstat->lock);
+ snprintf(buf, 8, "%s", (lstat->last_intr_fail_ip_addr != NULL) ?
+ "ipv6" : "ipv4");
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%s\n", buf);
+}
+ISCSI_STAT_TGT_ATTR_RO(fail_intr_addr_type);
+
+static ssize_t iscsi_stat_tgt_attr_show_attr_fail_intr_addr(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ unsigned char buf[32];
+
+ spin_lock(&lstat->lock);
+ if (lstat->last_intr_fail_ip_family == AF_INET6)
+ snprintf(buf, 32, "[%s]", lstat->last_intr_fail_ip_addr);
+ else
+ snprintf(buf, 32, "%s", lstat->last_intr_fail_ip_addr);
+ spin_unlock(&lstat->lock);
+
+ return snprintf(page, PAGE_SIZE, "%s\n", buf);
+}
+ISCSI_STAT_TGT_ATTR_RO(fail_intr_addr);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_tgt_attr, iscsi_wwn_stat_grps,
+ iscsi_tgt_attr_group);
+
+static struct configfs_attribute *iscsi_stat_tgt_attr_attrs[] = {
+ &iscsi_stat_tgt_attr_inst.attr,
+ &iscsi_stat_tgt_attr_indx.attr,
+ &iscsi_stat_tgt_attr_login_fails.attr,
+ &iscsi_stat_tgt_attr_last_fail_time.attr,
+ &iscsi_stat_tgt_attr_last_fail_type.attr,
+ &iscsi_stat_tgt_attr_fail_intr_name.attr,
+ &iscsi_stat_tgt_attr_fail_intr_addr_type.attr,
+ &iscsi_stat_tgt_attr_fail_intr_addr.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_tgt_attr_item_ops = {
+ .show_attribute = iscsi_stat_tgt_attr_attr_show,
+ .store_attribute = iscsi_stat_tgt_attr_attr_store,
+};
+
+struct config_item_type iscsi_stat_tgt_attr_cit = {
+ .ct_item_ops = &iscsi_stat_tgt_attr_item_ops,
+ .ct_attrs = iscsi_stat_tgt_attr_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Target Login Stats Table
+ */
+CONFIGFS_EATTR_STRUCT(iscsi_stat_login, iscsi_wwn_stat_grps);
+#define ISCSI_STAT_LOGIN(_name, _mode) \
+static struct iscsi_stat_login_attribute \
+ iscsi_stat_login_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_login_show_attr_##_name, \
+ iscsi_stat_login_store_attr_##_name);
+
+#define ISCSI_STAT_LOGIN_RO(_name) \
+static struct iscsi_stat_login_attribute \
+ iscsi_stat_login_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_login_show_attr_##_name);
+
+static ssize_t iscsi_stat_login_show_attr_inst(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_LOGIN_RO(inst);
+
+static ssize_t iscsi_stat_login_show_attr_indx(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_NODE_INDEX);
+}
+ISCSI_STAT_LOGIN_RO(indx);
+
+static ssize_t iscsi_stat_login_show_attr_accepts(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->accepts);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(accepts);
+
+static ssize_t iscsi_stat_login_show_attr_other_fails(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->other_fails);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(other_fails);
+
+static ssize_t iscsi_stat_login_show_attr_redirects(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->redirects);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(redirects);
+
+static ssize_t iscsi_stat_login_show_attr_authorize_fails(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->authorize_fails);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(authorize_fails);
+
+static ssize_t iscsi_stat_login_show_attr_authenticate_fails(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->authenticate_fails);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(authenticate_fails);
+
+static ssize_t iscsi_stat_login_show_attr_negotiate_fails(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_login_stats *lstat = &tiqn->login_stats;
+ ssize_t ret;
+
+ spin_lock(&lstat->lock);
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lstat->negotiate_fails);
+ spin_unlock(&lstat->lock);
+
+ return ret;
+}
+ISCSI_STAT_LOGIN_RO(negotiate_fails);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_login, iscsi_wwn_stat_grps,
+ iscsi_login_stats_group);
+
+static struct configfs_attribute *iscsi_stat_login_stats_attrs[] = {
+ &iscsi_stat_login_inst.attr,
+ &iscsi_stat_login_indx.attr,
+ &iscsi_stat_login_accepts.attr,
+ &iscsi_stat_login_other_fails.attr,
+ &iscsi_stat_login_redirects.attr,
+ &iscsi_stat_login_authorize_fails.attr,
+ &iscsi_stat_login_authenticate_fails.attr,
+ &iscsi_stat_login_negotiate_fails.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_login_stats_item_ops = {
+ .show_attribute = iscsi_stat_login_attr_show,
+ .store_attribute = iscsi_stat_login_attr_store,
+};
+
+struct config_item_type iscsi_stat_login_cit = {
+ .ct_item_ops = &iscsi_stat_login_stats_item_ops,
+ .ct_attrs = iscsi_stat_login_stats_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Target Logout Stats Table
+ */
+
+CONFIGFS_EATTR_STRUCT(iscsi_stat_logout, iscsi_wwn_stat_grps);
+#define ISCSI_STAT_LOGOUT(_name, _mode) \
+static struct iscsi_stat_logout_attribute \
+ iscsi_stat_logout_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_logout_show_attr_##_name, \
+ iscsi_stat_logout_store_attr_##_name);
+
+#define ISCSI_STAT_LOGOUT_RO(_name) \
+static struct iscsi_stat_logout_attribute \
+ iscsi_stat_logout_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_logout_show_attr_##_name);
+
+static ssize_t iscsi_stat_logout_show_attr_inst(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_LOGOUT_RO(inst);
+
+static ssize_t iscsi_stat_logout_show_attr_indx(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", ISCSI_NODE_INDEX);
+}
+ISCSI_STAT_LOGOUT_RO(indx);
+
+static ssize_t iscsi_stat_logout_show_attr_normal_logouts(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_logout_stats *lstats = &tiqn->logout_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", lstats->normal_logouts);
+}
+ISCSI_STAT_LOGOUT_RO(normal_logouts);
+
+static ssize_t iscsi_stat_logout_show_attr_abnormal_logouts(
+ struct iscsi_wwn_stat_grps *igrps, char *page)
+{
+ struct iscsi_tiqn *tiqn = container_of(igrps,
+ struct iscsi_tiqn, tiqn_stat_grps);
+ struct iscsi_logout_stats *lstats = &tiqn->logout_stats;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", lstats->abnormal_logouts);
+}
+ISCSI_STAT_LOGOUT_RO(abnormal_logouts);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_logout, iscsi_wwn_stat_grps,
+ iscsi_logout_stats_group);
+
+static struct configfs_attribute *iscsi_stat_logout_stats_attrs[] = {
+ &iscsi_stat_logout_inst.attr,
+ &iscsi_stat_logout_indx.attr,
+ &iscsi_stat_logout_normal_logouts.attr,
+ &iscsi_stat_logout_abnormal_logouts.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_logout_stats_item_ops = {
+ .show_attribute = iscsi_stat_logout_attr_show,
+ .store_attribute = iscsi_stat_logout_attr_store,
+};
+
+struct config_item_type iscsi_stat_logout_cit = {
+ .ct_item_ops = &iscsi_stat_logout_stats_item_ops,
+ .ct_attrs = iscsi_stat_logout_stats_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Session Stats Table
+ */
+
+CONFIGFS_EATTR_STRUCT(iscsi_stat_sess, iscsi_node_stat_grps);
+#define ISCSI_STAT_SESS(_name, _mode) \
+static struct iscsi_stat_sess_attribute \
+ iscsi_stat_sess_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ iscsi_stat_sess_show_attr_##_name, \
+ iscsi_stat_sess_store_attr_##_name);
+
+#define ISCSI_STAT_SESS_RO(_name) \
+static struct iscsi_stat_sess_attribute \
+ iscsi_stat_sess_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ iscsi_stat_sess_show_attr_##_name);
+
+static ssize_t iscsi_stat_sess_show_attr_inst(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_wwn *wwn = acl->se_node_acl.se_tpg->se_tpg_wwn;
+ struct iscsi_tiqn *tiqn = container_of(wwn,
+ struct iscsi_tiqn, tiqn_wwn);
+
+ return snprintf(page, PAGE_SIZE, "%u\n", tiqn->tiqn_index);
+}
+ISCSI_STAT_SESS_RO(inst);
+
+static ssize_t iscsi_stat_sess_show_attr_node(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ sess->sess_ops->SessionType ? 0 : ISCSI_NODE_INDEX);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(node);
+
+static ssize_t iscsi_stat_sess_show_attr_indx(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ sess->session_index);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(indx);
+
+static ssize_t iscsi_stat_sess_show_attr_cmd_pdus(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n", sess->cmd_pdus);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(cmd_pdus);
+
+static ssize_t iscsi_stat_sess_show_attr_rsp_pdus(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n", sess->rsp_pdus);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(rsp_pdus);
+
+static ssize_t iscsi_stat_sess_show_attr_txdata_octs(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%llu\n",
+ (unsigned long long)sess->tx_data_octets);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(txdata_octs);
+
+static ssize_t iscsi_stat_sess_show_attr_rxdata_octs(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%llu\n",
+ (unsigned long long)sess->rx_data_octets);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(rxdata_octs);
+
+static ssize_t iscsi_stat_sess_show_attr_conn_digest_errors(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ sess->conn_digest_errors);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(conn_digest_errors);
+
+static ssize_t iscsi_stat_sess_show_attr_conn_timeout_errors(
+ struct iscsi_node_stat_grps *igrps, char *page)
+{
+ struct iscsi_node_acl *acl = container_of(igrps,
+ struct iscsi_node_acl, node_stat_grps);
+ struct se_node_acl *se_nacl = &acl->se_node_acl;
+ struct iscsi_session *sess;
+ struct se_session *se_sess;
+ ssize_t ret = 0;
+
+ spin_lock_bh(&se_nacl->nacl_sess_lock);
+ se_sess = se_nacl->nacl_sess;
+ if (se_sess) {
+ sess = se_sess->fabric_sess_ptr;
+ if (sess)
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ sess->conn_timeout_errors);
+ }
+ spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+ return ret;
+}
+ISCSI_STAT_SESS_RO(conn_timeout_errors);
+
+CONFIGFS_EATTR_OPS(iscsi_stat_sess, iscsi_node_stat_grps,
+ iscsi_sess_stats_group);
+
+static struct configfs_attribute *iscsi_stat_sess_stats_attrs[] = {
+ &iscsi_stat_sess_inst.attr,
+ &iscsi_stat_sess_node.attr,
+ &iscsi_stat_sess_indx.attr,
+ &iscsi_stat_sess_cmd_pdus.attr,
+ &iscsi_stat_sess_rsp_pdus.attr,
+ &iscsi_stat_sess_txdata_octs.attr,
+ &iscsi_stat_sess_rxdata_octs.attr,
+ &iscsi_stat_sess_conn_digest_errors.attr,
+ &iscsi_stat_sess_conn_timeout_errors.attr,
+ NULL,
+};
+
+static struct configfs_item_operations iscsi_stat_sess_stats_item_ops = {
+ .show_attribute = iscsi_stat_sess_attr_show,
+ .store_attribute = iscsi_stat_sess_attr_store,
+};
+
+struct config_item_type iscsi_stat_sess_cit = {
+ .ct_item_ops = &iscsi_stat_sess_stats_item_ops,
+ .ct_attrs = iscsi_stat_sess_stats_attrs,
+ .ct_owner = THIS_MODULE,
+};
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.h
new file mode 100644
index 0000000..3ff76b4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_stat.h
@@ -0,0 +1,64 @@
+#ifndef ISCSI_TARGET_STAT_H
+#define ISCSI_TARGET_STAT_H
+
+/*
+ * For struct iscsi_tiqn->tiqn_wwn default groups
+ */
+extern struct config_item_type iscsi_stat_instance_cit;
+extern struct config_item_type iscsi_stat_sess_err_cit;
+extern struct config_item_type iscsi_stat_tgt_attr_cit;
+extern struct config_item_type iscsi_stat_login_cit;
+extern struct config_item_type iscsi_stat_logout_cit;
+
+/*
+ * For struct iscsi_session->se_sess default groups
+ */
+extern struct config_item_type iscsi_stat_sess_cit;
+
+/* iSCSI session error types */
+#define ISCSI_SESS_ERR_UNKNOWN 0
+#define ISCSI_SESS_ERR_DIGEST 1
+#define ISCSI_SESS_ERR_CXN_TIMEOUT 2
+#define ISCSI_SESS_ERR_PDU_FORMAT 3
+
+/* iSCSI session error stats */
+struct iscsi_sess_err_stats {
+ spinlock_t lock;
+ u32 digest_errors;
+ u32 cxn_timeout_errors;
+ u32 pdu_format_errors;
+ u32 last_sess_failure_type;
+ char last_sess_fail_rem_name[224];
+} ____cacheline_aligned;
+
+/* iSCSI login failure types (sub oids) */
+#define ISCSI_LOGIN_FAIL_OTHER 2
+#define ISCSI_LOGIN_FAIL_REDIRECT 3
+#define ISCSI_LOGIN_FAIL_AUTHORIZE 4
+#define ISCSI_LOGIN_FAIL_AUTHENTICATE 5
+#define ISCSI_LOGIN_FAIL_NEGOTIATE 6
+
+/* iSCSI login stats */
+struct iscsi_login_stats {
+ spinlock_t lock;
+ u32 accepts;
+ u32 other_fails;
+ u32 redirects;
+ u32 authorize_fails;
+ u32 authenticate_fails;
+ u32 negotiate_fails; /* used for notifications */
+ u64 last_fail_time; /* time stamp (jiffies) */
+ u32 last_fail_type;
+ int last_intr_fail_ip_family;
+ unsigned char last_intr_fail_ip_addr[IPV6_ADDRESS_SPACE];
+ char last_intr_fail_name[224];
+} ____cacheline_aligned;
+
+/* iSCSI logout stats */
+struct iscsi_logout_stats {
+ spinlock_t lock;
+ u32 normal_logouts;
+ u32 abnormal_logouts;
+} ____cacheline_aligned;
+
+#endif /*** ISCSI_TARGET_STAT_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.c
new file mode 100644
index 0000000..e01da9d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.c
@@ -0,0 +1,849 @@
+/*******************************************************************************
+ * This file contains the iSCSI Target specific Task Management functions.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <asm/unaligned.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_datain_values.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target_tmr.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+
+u8 iscsit_tmr_abort_task(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_cmd *ref_cmd;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_tmr_req *tmr_req = cmd->tmr_req;
+ struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
+ struct iscsi_tm *hdr = (struct iscsi_tm *) buf;
+
+ ref_cmd = iscsit_find_cmd_from_itt(conn, hdr->rtt);
+ if (!ref_cmd) {
+ pr_err("Unable to locate RefTaskTag: 0x%08x on CID:"
+ " %hu.\n", hdr->rtt, conn->cid);
+ return ((hdr->refcmdsn >= conn->sess->exp_cmd_sn) &&
+ (hdr->refcmdsn <= conn->sess->max_cmd_sn)) ?
+ ISCSI_TMF_RSP_COMPLETE : ISCSI_TMF_RSP_NO_TASK;
+ }
+ if (ref_cmd->cmd_sn != hdr->refcmdsn) {
+ pr_err("RefCmdSN 0x%08x does not equal"
+ " task's CmdSN 0x%08x. Rejecting ABORT_TASK.\n",
+ hdr->refcmdsn, ref_cmd->cmd_sn);
+ return ISCSI_TMF_RSP_REJECTED;
+ }
+
+ se_tmr->ref_task_tag = hdr->rtt;
+ se_tmr->ref_cmd = &ref_cmd->se_cmd;
+ tmr_req->ref_cmd_sn = hdr->refcmdsn;
+ tmr_req->exp_data_sn = hdr->exp_datasn;
+
+ return ISCSI_TMF_RSP_COMPLETE;
+}
+
+/*
+ * Called from iscsit_handle_task_mgt_cmd().
+ */
+int iscsit_tmr_task_warm_reset(
+ struct iscsi_conn *conn,
+ struct iscsi_tmr_req *tmr_req,
+ unsigned char *buf)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+#if 0
+ struct iscsi_init_task_mgt_cmnd *hdr =
+ (struct iscsi_init_task_mgt_cmnd *) buf;
+#endif
+ if (!na->tmr_warm_reset) {
+ pr_err("TMR Opcode TARGET_WARM_RESET authorization"
+ " failed for Initiator Node: %s\n",
+ sess->se_sess->se_node_acl->initiatorname);
+ return -1;
+ }
+ /*
+ * Do the real work in transport_generic_do_tmr().
+ */
+ return 0;
+}
+
+int iscsit_tmr_task_cold_reset(
+ struct iscsi_conn *conn,
+ struct iscsi_tmr_req *tmr_req,
+ unsigned char *buf)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+
+ if (!na->tmr_cold_reset) {
+ pr_err("TMR Opcode TARGET_COLD_RESET authorization"
+ " failed for Initiator Node: %s\n",
+ sess->se_sess->se_node_acl->initiatorname);
+ return -1;
+ }
+ /*
+ * Do the real work in transport_generic_do_tmr().
+ */
+ return 0;
+}
+
+u8 iscsit_tmr_task_reassign(
+ struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_cmd *ref_cmd = NULL;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_conn_recovery *cr = NULL;
+ struct iscsi_tmr_req *tmr_req = cmd->tmr_req;
+ struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
+ struct iscsi_tm *hdr = (struct iscsi_tm *) buf;
+ int ret;
+
+ pr_debug("Got TASK_REASSIGN TMR ITT: 0x%08x,"
+ " RefTaskTag: 0x%08x, ExpDataSN: 0x%08x, CID: %hu\n",
+ hdr->itt, hdr->rtt, hdr->exp_datasn, conn->cid);
+
+ if (conn->sess->sess_ops->ErrorRecoveryLevel != 2) {
+ pr_err("TMR TASK_REASSIGN not supported in ERL<2,"
+ " ignoring request.\n");
+ return ISCSI_TMF_RSP_NOT_SUPPORTED;
+ }
+
+ ret = iscsit_find_cmd_for_recovery(conn->sess, &ref_cmd, &cr, hdr->rtt);
+ if (ret == -2) {
+ pr_err("Command ITT: 0x%08x is still alligent to CID:"
+ " %hu\n", ref_cmd->init_task_tag, cr->cid);
+ return ISCSI_TMF_RSP_TASK_ALLEGIANT;
+ } else if (ret == -1) {
+ pr_err("Unable to locate RefTaskTag: 0x%08x in"
+ " connection recovery command list.\n", hdr->rtt);
+ return ISCSI_TMF_RSP_NO_TASK;
+ }
+ /*
+ * Temporary check to prevent connection recovery for
+ * connections with a differing MaxRecvDataSegmentLength.
+ */
+ if (cr->maxrecvdatasegmentlength !=
+ conn->conn_ops->MaxRecvDataSegmentLength) {
+ pr_err("Unable to perform connection recovery for"
+ " differing MaxRecvDataSegmentLength, rejecting"
+ " TMR TASK_REASSIGN.\n");
+ return ISCSI_TMF_RSP_REJECTED;
+ }
+
+ se_tmr->ref_task_tag = hdr->rtt;
+ se_tmr->ref_cmd = &ref_cmd->se_cmd;
+ se_tmr->ref_task_lun = get_unaligned_le64(&hdr->lun);
+ tmr_req->ref_cmd_sn = hdr->refcmdsn;
+ tmr_req->exp_data_sn = hdr->exp_datasn;
+ tmr_req->conn_recovery = cr;
+ tmr_req->task_reassign = 1;
+ /*
+ * Command can now be reassigned to a new connection.
+ * The task management response must be sent before the
+ * reassignment actually happens. See iscsi_tmr_post_handler().
+ */
+ return ISCSI_TMF_RSP_COMPLETE;
+}
+
+static void iscsit_task_reassign_remove_cmd(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn_recovery *cr,
+ struct iscsi_session *sess)
+{
+ int ret;
+
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ ret = iscsit_remove_cmd_from_connection_recovery(cmd, sess);
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ if (!ret) {
+ pr_debug("iSCSI connection recovery successful for CID:"
+ " %hu on SID: %u\n", cr->cid, sess->sid);
+ iscsit_remove_active_connection_recovery_entry(cr, sess);
+ }
+}
+
+static int iscsit_task_reassign_complete_nop_out(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
+ struct se_cmd *se_cmd = se_tmr->ref_cmd;
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+ struct iscsi_conn_recovery *cr;
+
+ if (!cmd->cr) {
+ pr_err("struct iscsi_conn_recovery pointer for ITT: 0x%08x"
+ " is NULL!\n", cmd->init_task_tag);
+ return -1;
+ }
+ cr = cmd->cr;
+
+ /*
+ * Reset the StatSN so a new one for this commands new connection
+ * will be assigned.
+ * Reset the ExpStatSN as well so we may receive Status SNACKs.
+ */
+ cmd->stat_sn = cmd->exp_stat_sn = 0;
+
+ iscsit_task_reassign_remove_cmd(cmd, cr, conn->sess);
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ cmd->i_state = ISTATE_SEND_NOPIN;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+}
+
+static int iscsit_task_reassign_complete_write(
+ struct iscsi_cmd *cmd,
+ struct iscsi_tmr_req *tmr_req)
+{
+ int no_build_r2ts = 0;
+ u32 length = 0, offset = 0;
+ struct iscsi_conn *conn = cmd->conn;
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+ /*
+ * The Initiator must not send a R2T SNACK with a Begrun less than
+ * the TMR TASK_REASSIGN's ExpDataSN.
+ */
+ if (!tmr_req->exp_data_sn) {
+ cmd->cmd_flags &= ~ICF_GOT_DATACK_SNACK;
+ cmd->acked_data_sn = 0;
+ } else {
+ cmd->cmd_flags |= ICF_GOT_DATACK_SNACK;
+ cmd->acked_data_sn = (tmr_req->exp_data_sn - 1);
+ }
+
+ /*
+ * The TMR TASK_REASSIGN's ExpDataSN contains the next R2TSN the
+ * Initiator is expecting. The Target controls all WRITE operations
+ * so if we have received all DataOUT we can safety ignore Initiator.
+ */
+ if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
+ if (!(cmd->se_cmd.transport_state & CMD_T_SENT)) {
+ pr_debug("WRITE ITT: 0x%08x: t_state: %d"
+ " never sent to transport\n",
+ cmd->init_task_tag, cmd->se_cmd.t_state);
+ return transport_generic_handle_data(se_cmd);
+ }
+
+ cmd->i_state = ISTATE_SEND_STATUS;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+ }
+
+ /*
+ * Special case to deal with DataSequenceInOrder=No and Non-Immeidate
+ * Unsolicited DataOut.
+ */
+ if (cmd->unsolicited_data) {
+ cmd->unsolicited_data = 0;
+
+ offset = cmd->next_burst_len = cmd->write_data_done;
+
+ if ((conn->sess->sess_ops->FirstBurstLength - offset) >=
+ cmd->data_length) {
+ no_build_r2ts = 1;
+ length = (cmd->data_length - offset);
+ } else
+ length = (conn->sess->sess_ops->FirstBurstLength - offset);
+
+ spin_lock_bh(&cmd->r2t_lock);
+ if (iscsit_add_r2t_to_list(cmd, offset, length, 0, 0) < 0) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+ cmd->outstanding_r2ts++;
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ if (no_build_r2ts)
+ return 0;
+ }
+ /*
+ * iscsit_build_r2ts_for_cmd() can handle the rest from here.
+ */
+ return iscsit_build_r2ts_for_cmd(cmd, conn, 2);
+}
+
+static int iscsit_task_reassign_complete_read(
+ struct iscsi_cmd *cmd,
+ struct iscsi_tmr_req *tmr_req)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_datain_req *dr;
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+ /*
+ * The Initiator must not send a Data SNACK with a BegRun less than
+ * the TMR TASK_REASSIGN's ExpDataSN.
+ */
+ if (!tmr_req->exp_data_sn) {
+ cmd->cmd_flags &= ~ICF_GOT_DATACK_SNACK;
+ cmd->acked_data_sn = 0;
+ } else {
+ cmd->cmd_flags |= ICF_GOT_DATACK_SNACK;
+ cmd->acked_data_sn = (tmr_req->exp_data_sn - 1);
+ }
+
+ if (!(cmd->se_cmd.transport_state & CMD_T_SENT)) {
+ pr_debug("READ ITT: 0x%08x: t_state: %d never sent to"
+ " transport\n", cmd->init_task_tag,
+ cmd->se_cmd.t_state);
+ transport_handle_cdb_direct(se_cmd);
+ return 0;
+ }
+
+ if (!(se_cmd->transport_state & CMD_T_COMPLETE)) {
+ pr_err("READ ITT: 0x%08x: t_state: %d, never returned"
+ " from transport\n", cmd->init_task_tag,
+ cmd->se_cmd.t_state);
+ return -1;
+ }
+
+ dr = iscsit_allocate_datain_req();
+ if (!dr)
+ return -1;
+ /*
+ * The TMR TASK_REASSIGN's ExpDataSN contains the next DataSN the
+ * Initiator is expecting.
+ */
+ dr->data_sn = dr->begrun = tmr_req->exp_data_sn;
+ dr->runlength = 0;
+ dr->generate_recovery_values = 1;
+ dr->recovery = DATAIN_CONNECTION_RECOVERY;
+
+ iscsit_attach_datain_req(cmd, dr);
+
+ cmd->i_state = ISTATE_SEND_DATAIN;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+}
+
+static int iscsit_task_reassign_complete_none(
+ struct iscsi_cmd *cmd,
+ struct iscsi_tmr_req *tmr_req)
+{
+ struct iscsi_conn *conn = cmd->conn;
+
+ cmd->i_state = ISTATE_SEND_STATUS;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+}
+
+static int iscsit_task_reassign_complete_scsi_cmnd(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
+ struct se_cmd *se_cmd = se_tmr->ref_cmd;
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+ struct iscsi_conn_recovery *cr;
+
+ if (!cmd->cr) {
+ pr_err("struct iscsi_conn_recovery pointer for ITT: 0x%08x"
+ " is NULL!\n", cmd->init_task_tag);
+ return -1;
+ }
+ cr = cmd->cr;
+
+ /*
+ * Reset the StatSN so a new one for this commands new connection
+ * will be assigned.
+ * Reset the ExpStatSN as well so we may receive Status SNACKs.
+ */
+ cmd->stat_sn = cmd->exp_stat_sn = 0;
+
+ iscsit_task_reassign_remove_cmd(cmd, cr, conn->sess);
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ if (se_cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ cmd->i_state = ISTATE_SEND_STATUS;
+ iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
+ return 0;
+ }
+
+ switch (cmd->data_direction) {
+ case DMA_TO_DEVICE:
+ return iscsit_task_reassign_complete_write(cmd, tmr_req);
+ case DMA_FROM_DEVICE:
+ return iscsit_task_reassign_complete_read(cmd, tmr_req);
+ case DMA_NONE:
+ return iscsit_task_reassign_complete_none(cmd, tmr_req);
+ default:
+ pr_err("Unknown cmd->data_direction: 0x%02x\n",
+ cmd->data_direction);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iscsit_task_reassign_complete(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
+ struct se_cmd *se_cmd;
+ struct iscsi_cmd *cmd;
+ int ret = 0;
+
+ if (!se_tmr->ref_cmd) {
+ pr_err("TMR Request is missing a RefCmd struct iscsi_cmd.\n");
+ return -1;
+ }
+ se_cmd = se_tmr->ref_cmd;
+ cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ cmd->conn = conn;
+
+ switch (cmd->iscsi_opcode) {
+ case ISCSI_OP_NOOP_OUT:
+ ret = iscsit_task_reassign_complete_nop_out(tmr_req, conn);
+ break;
+ case ISCSI_OP_SCSI_CMD:
+ ret = iscsit_task_reassign_complete_scsi_cmnd(tmr_req, conn);
+ break;
+ default:
+ pr_err("Illegal iSCSI Opcode 0x%02x during"
+ " command realligence\n", cmd->iscsi_opcode);
+ return -1;
+ }
+
+ if (ret != 0)
+ return ret;
+
+ pr_debug("Completed connection realligence for Opcode: 0x%02x,"
+ " ITT: 0x%08x to CID: %hu.\n", cmd->iscsi_opcode,
+ cmd->init_task_tag, conn->cid);
+
+ return 0;
+}
+
+/*
+ * Handles special after-the-fact actions related to TMRs.
+ * Right now the only one that its really needed for is
+ * connection recovery releated TASK_REASSIGN.
+ */
+extern int iscsit_tmr_post_handler(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
+{
+ struct iscsi_tmr_req *tmr_req = cmd->tmr_req;
+ struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
+
+ if (tmr_req->task_reassign &&
+ (se_tmr->response == ISCSI_TMF_RSP_COMPLETE))
+ return iscsit_task_reassign_complete(tmr_req, conn);
+
+ return 0;
+}
+
+/*
+ * Nothing to do here, but leave it for good measure. :-)
+ */
+int iscsit_task_reassign_prepare_read(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ return 0;
+}
+
+static void iscsit_task_reassign_prepare_unsolicited_dataout(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ int i, j;
+ struct iscsi_pdu *pdu = NULL;
+ struct iscsi_seq *seq = NULL;
+
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ cmd->data_sn = 0;
+
+ if (cmd->immediate_data)
+ cmd->r2t_offset += (cmd->first_burst_len -
+ cmd->seq_start_offset);
+
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ cmd->write_data_done -= (cmd->immediate_data) ?
+ (cmd->first_burst_len -
+ cmd->seq_start_offset) :
+ cmd->first_burst_len;
+ cmd->first_burst_len = 0;
+ return;
+ }
+
+ for (i = 0; i < cmd->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ if ((pdu->offset >= cmd->seq_start_offset) &&
+ ((pdu->offset + pdu->length) <=
+ cmd->seq_end_offset)) {
+ cmd->first_burst_len -= pdu->length;
+ cmd->write_data_done -= pdu->length;
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+ } else {
+ for (i = 0; i < cmd->seq_count; i++) {
+ seq = &cmd->seq_list[i];
+
+ if (seq->type != SEQTYPE_UNSOLICITED)
+ continue;
+
+ cmd->write_data_done -=
+ (seq->offset - seq->orig_offset);
+ cmd->first_burst_len = 0;
+ seq->data_sn = 0;
+ seq->offset = seq->orig_offset;
+ seq->next_burst_len = 0;
+ seq->status = DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY;
+
+ if (conn->sess->sess_ops->DataPDUInOrder)
+ continue;
+
+ for (j = 0; j < seq->pdu_count; j++) {
+ pdu = &cmd->pdu_list[j+seq->pdu_start];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+ }
+}
+
+int iscsit_task_reassign_prepare_write(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
+ struct se_cmd *se_cmd = se_tmr->ref_cmd;
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+ struct iscsi_pdu *pdu = NULL;
+ struct iscsi_r2t *r2t = NULL, *r2t_tmp;
+ int first_incomplete_r2t = 1, i = 0;
+
+ /*
+ * The command was in the process of receiving Unsolicited DataOUT when
+ * the connection failed.
+ */
+ if (cmd->unsolicited_data)
+ iscsit_task_reassign_prepare_unsolicited_dataout(cmd, conn);
+
+ /*
+ * The Initiator is requesting R2Ts starting from zero, skip
+ * checking acknowledged R2Ts and start checking struct iscsi_r2ts
+ * greater than zero.
+ */
+ if (!tmr_req->exp_data_sn)
+ goto drop_unacknowledged_r2ts;
+
+ /*
+ * We now check that the PDUs in DataOUT sequences below
+ * the TMR TASK_REASSIGN ExpDataSN (R2TSN the Initiator is
+ * expecting next) have all the DataOUT they require to complete
+ * the DataOUT sequence. First scan from R2TSN 0 to TMR
+ * TASK_REASSIGN ExpDataSN-1.
+ *
+ * If we have not received all DataOUT in question, we must
+ * make sure to make the appropriate changes to values in
+ * struct iscsi_cmd (and elsewhere depending on session parameters)
+ * so iscsit_build_r2ts_for_cmd() in iscsit_task_reassign_complete_write()
+ * will resend a new R2T for the DataOUT sequences in question.
+ */
+ spin_lock_bh(&cmd->r2t_lock);
+ if (list_empty(&cmd->cmd_r2t_list)) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
+
+ if (r2t->r2t_sn >= tmr_req->exp_data_sn)
+ continue;
+ /*
+ * Safely ignore Recovery R2Ts and R2Ts that have completed
+ * DataOUT sequences.
+ */
+ if (r2t->seq_complete)
+ continue;
+
+ if (r2t->recovery_r2t)
+ continue;
+
+ /*
+ * DataSequenceInOrder=Yes:
+ *
+ * Taking into account the iSCSI implementation requirement of
+ * MaxOutstandingR2T=1 while ErrorRecoveryLevel>0 and
+ * DataSequenceInOrder=Yes, we must take into consideration
+ * the following:
+ *
+ * DataSequenceInOrder=No:
+ *
+ * Taking into account that the Initiator controls the (possibly
+ * random) PDU Order in (possibly random) Sequence Order of
+ * DataOUT the target requests with R2Ts, we must take into
+ * consideration the following:
+ *
+ * DataPDUInOrder=Yes for DataSequenceInOrder=[Yes,No]:
+ *
+ * While processing non-complete R2T DataOUT sequence requests
+ * the Target will re-request only the total sequence length
+ * minus current received offset. This is because we must
+ * assume the initiator will continue sending DataOUT from the
+ * last PDU before the connection failed.
+ *
+ * DataPDUInOrder=No for DataSequenceInOrder=[Yes,No]:
+ *
+ * While processing non-complete R2T DataOUT sequence requests
+ * the Target will re-request the entire DataOUT sequence if
+ * any single PDU is missing from the sequence. This is because
+ * we have no logical method to determine the next PDU offset,
+ * and we must assume the Initiator will be sending any random
+ * PDU offset in the current sequence after TASK_REASSIGN
+ * has completed.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder) {
+ if (!first_incomplete_r2t) {
+ cmd->r2t_offset -= r2t->xfer_len;
+ goto next;
+ }
+
+ if (conn->sess->sess_ops->DataPDUInOrder) {
+ cmd->data_sn = 0;
+ cmd->r2t_offset -= (r2t->xfer_len -
+ cmd->next_burst_len);
+ first_incomplete_r2t = 0;
+ goto next;
+ }
+
+ cmd->data_sn = 0;
+ cmd->r2t_offset -= r2t->xfer_len;
+
+ for (i = 0; i < cmd->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ if ((pdu->offset >= r2t->offset) &&
+ (pdu->offset < (r2t->offset +
+ r2t->xfer_len))) {
+ cmd->next_burst_len -= pdu->length;
+ cmd->write_data_done -= pdu->length;
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+
+ first_incomplete_r2t = 0;
+ } else {
+ struct iscsi_seq *seq;
+
+ seq = iscsit_get_seq_holder(cmd, r2t->offset,
+ r2t->xfer_len);
+ if (!seq) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ cmd->write_data_done -=
+ (seq->offset - seq->orig_offset);
+ seq->data_sn = 0;
+ seq->offset = seq->orig_offset;
+ seq->next_burst_len = 0;
+ seq->status = DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY;
+
+ cmd->seq_send_order--;
+
+ if (conn->sess->sess_ops->DataPDUInOrder)
+ goto next;
+
+ for (i = 0; i < seq->pdu_count; i++) {
+ pdu = &cmd->pdu_list[i+seq->pdu_start];
+
+ if (pdu->status != ISCSI_PDU_RECEIVED_OK)
+ continue;
+
+ pdu->status = ISCSI_PDU_NOT_RECEIVED;
+ }
+ }
+
+next:
+ cmd->outstanding_r2ts--;
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ /*
+ * We now drop all unacknowledged R2Ts, ie: ExpDataSN from TMR
+ * TASK_REASSIGN to the last R2T in the list.. We are also careful
+ * to check that the Initiator is not requesting R2Ts for DataOUT
+ * sequences it has already completed.
+ *
+ * Free each R2T in question and adjust values in struct iscsi_cmd
+ * accordingly so iscsit_build_r2ts_for_cmd() do the rest of
+ * the work after the TMR TASK_REASSIGN Response is sent.
+ */
+drop_unacknowledged_r2ts:
+
+ cmd->cmd_flags &= ~ICF_SENT_LAST_R2T;
+ cmd->r2t_sn = tmr_req->exp_data_sn;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) {
+ /*
+ * Skip up to the R2T Sequence number provided by the
+ * iSCSI TASK_REASSIGN TMR
+ */
+ if (r2t->r2t_sn < tmr_req->exp_data_sn)
+ continue;
+
+ if (r2t->seq_complete) {
+ pr_err("Initiator is requesting R2Ts from"
+ " R2TSN: 0x%08x, but R2TSN: 0x%08x, Offset: %u,"
+ " Length: %u is already complete."
+ " BAD INITIATOR ERL=2 IMPLEMENTATION!\n",
+ tmr_req->exp_data_sn, r2t->r2t_sn,
+ r2t->offset, r2t->xfer_len);
+ spin_unlock_bh(&cmd->r2t_lock);
+ return -1;
+ }
+
+ if (r2t->recovery_r2t) {
+ iscsit_free_r2t(r2t, cmd);
+ continue;
+ }
+
+ /* DataSequenceInOrder=Yes:
+ *
+ * Taking into account the iSCSI implementation requirement of
+ * MaxOutstandingR2T=1 while ErrorRecoveryLevel>0 and
+ * DataSequenceInOrder=Yes, it's safe to subtract the R2Ts
+ * entire transfer length from the commands R2T offset marker.
+ *
+ * DataSequenceInOrder=No:
+ *
+ * We subtract the difference from struct iscsi_seq between the
+ * current offset and original offset from cmd->write_data_done
+ * for account for DataOUT PDUs already received. Then reset
+ * the current offset to the original and zero out the current
+ * burst length, to make sure we re-request the entire DataOUT
+ * sequence.
+ */
+ if (conn->sess->sess_ops->DataSequenceInOrder)
+ cmd->r2t_offset -= r2t->xfer_len;
+ else
+ cmd->seq_send_order--;
+
+ cmd->outstanding_r2ts--;
+ iscsit_free_r2t(r2t, cmd);
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return 0;
+}
+
+/*
+ * Performs sanity checks TMR TASK_REASSIGN's ExpDataSN for
+ * a given struct iscsi_cmd.
+ */
+int iscsit_check_task_reassign_expdatasn(
+ struct iscsi_tmr_req *tmr_req,
+ struct iscsi_conn *conn)
+{
+ struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
+ struct se_cmd *se_cmd = se_tmr->ref_cmd;
+ struct iscsi_cmd *ref_cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ if (ref_cmd->iscsi_opcode != ISCSI_OP_SCSI_CMD)
+ return 0;
+
+ if (se_cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION)
+ return 0;
+
+ if (ref_cmd->data_direction == DMA_NONE)
+ return 0;
+
+ /*
+ * For READs the TMR TASK_REASSIGNs ExpDataSN contains the next DataSN
+ * of DataIN the Initiator is expecting.
+ *
+ * Also check that the Initiator is not re-requesting DataIN that has
+ * already been acknowledged with a DataAck SNACK.
+ */
+ if (ref_cmd->data_direction == DMA_FROM_DEVICE) {
+ if (tmr_req->exp_data_sn > ref_cmd->data_sn) {
+ pr_err("Received ExpDataSN: 0x%08x for READ"
+ " in TMR TASK_REASSIGN greater than command's"
+ " DataSN: 0x%08x.\n", tmr_req->exp_data_sn,
+ ref_cmd->data_sn);
+ return -1;
+ }
+ if ((ref_cmd->cmd_flags & ICF_GOT_DATACK_SNACK) &&
+ (tmr_req->exp_data_sn <= ref_cmd->acked_data_sn)) {
+ pr_err("Received ExpDataSN: 0x%08x for READ"
+ " in TMR TASK_REASSIGN for previously"
+ " acknowledged DataIN: 0x%08x,"
+ " protocol error\n", tmr_req->exp_data_sn,
+ ref_cmd->acked_data_sn);
+ return -1;
+ }
+ return iscsit_task_reassign_prepare_read(tmr_req, conn);
+ }
+
+ /*
+ * For WRITEs the TMR TASK_REASSIGNs ExpDataSN contains the next R2TSN
+ * for R2Ts the Initiator is expecting.
+ *
+ * Do the magic in iscsit_task_reassign_prepare_write().
+ */
+ if (ref_cmd->data_direction == DMA_TO_DEVICE) {
+ if (tmr_req->exp_data_sn > ref_cmd->r2t_sn) {
+ pr_err("Received ExpDataSN: 0x%08x for WRITE"
+ " in TMR TASK_REASSIGN greater than command's"
+ " R2TSN: 0x%08x.\n", tmr_req->exp_data_sn,
+ ref_cmd->r2t_sn);
+ return -1;
+ }
+ return iscsit_task_reassign_prepare_write(tmr_req, conn);
+ }
+
+ pr_err("Unknown iSCSI data_direction: 0x%02x\n",
+ ref_cmd->data_direction);
+
+ return -1;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.h
new file mode 100644
index 0000000..142e992
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tmr.h
@@ -0,0 +1,14 @@
+#ifndef ISCSI_TARGET_TMR_H
+#define ISCSI_TARGET_TMR_H
+
+extern u8 iscsit_tmr_abort_task(struct iscsi_cmd *, unsigned char *);
+extern int iscsit_tmr_task_warm_reset(struct iscsi_conn *, struct iscsi_tmr_req *,
+ unsigned char *);
+extern int iscsit_tmr_task_cold_reset(struct iscsi_conn *, struct iscsi_tmr_req *,
+ unsigned char *);
+extern u8 iscsit_tmr_task_reassign(struct iscsi_cmd *, unsigned char *);
+extern int iscsit_tmr_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_check_task_reassign_expdatasn(struct iscsi_tmr_req *,
+ struct iscsi_conn *);
+
+#endif /* ISCSI_TARGET_TMR_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.c
new file mode 100644
index 0000000..c3d7bf5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.c
@@ -0,0 +1,769 @@
+/*******************************************************************************
+ * This file contains iSCSI Target Portal Group related functions.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_login.h"
+#include "iscsi_target_nodeattrib.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_parameters.h"
+
+struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
+{
+ struct iscsi_portal_group *tpg;
+
+ tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
+ if (!tpg) {
+ pr_err("Unable to allocate struct iscsi_portal_group\n");
+ return NULL;
+ }
+
+ tpg->tpgt = tpgt;
+ tpg->tpg_state = TPG_STATE_FREE;
+ tpg->tpg_tiqn = tiqn;
+ INIT_LIST_HEAD(&tpg->tpg_gnp_list);
+ INIT_LIST_HEAD(&tpg->tpg_list);
+ mutex_init(&tpg->tpg_access_lock);
+ mutex_init(&tpg->np_login_lock);
+ spin_lock_init(&tpg->tpg_state_lock);
+ spin_lock_init(&tpg->tpg_np_lock);
+
+ return tpg;
+}
+
+static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
+
+int iscsit_load_discovery_tpg(void)
+{
+ struct iscsi_param *param;
+ struct iscsi_portal_group *tpg;
+ int ret;
+
+ tpg = iscsit_alloc_portal_group(NULL, 1);
+ if (!tpg) {
+ pr_err("Unable to allocate struct iscsi_portal_group\n");
+ return -1;
+ }
+
+ ret = core_tpg_register(
+ &lio_target_fabric_configfs->tf_ops,
+ NULL, &tpg->tpg_se_tpg, tpg,
+ TRANSPORT_TPG_TYPE_DISCOVERY);
+ if (ret < 0) {
+ kfree(tpg);
+ return -1;
+ }
+
+ tpg->sid = 1; /* First Assigned LIO Session ID */
+ iscsit_set_default_tpg_attribs(tpg);
+
+ if (iscsi_create_default_params(&tpg->param_list) < 0)
+ goto out;
+ /*
+ * By default we disable authentication for discovery sessions,
+ * this can be changed with:
+ *
+ * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
+ */
+ param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
+ if (!param)
+ goto out;
+
+ if (iscsi_update_param_value(param, "CHAP,None") < 0)
+ goto out;
+
+ tpg->tpg_attrib.authentication = 0;
+
+ spin_lock(&tpg->tpg_state_lock);
+ tpg->tpg_state = TPG_STATE_ACTIVE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ iscsit_global->discovery_tpg = tpg;
+ pr_debug("CORE[0] - Allocated Discovery TPG\n");
+
+ return 0;
+out:
+ if (tpg->sid == 1)
+ core_tpg_deregister(&tpg->tpg_se_tpg);
+ kfree(tpg);
+ return -1;
+}
+
+void iscsit_release_discovery_tpg(void)
+{
+ struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
+
+ if (!tpg)
+ return;
+
+ core_tpg_deregister(&tpg->tpg_se_tpg);
+
+ kfree(tpg);
+ iscsit_global->discovery_tpg = NULL;
+}
+
+struct iscsi_portal_group *iscsit_get_tpg_from_np(
+ struct iscsi_tiqn *tiqn,
+ struct iscsi_np *np)
+{
+ struct iscsi_portal_group *tpg = NULL;
+ struct iscsi_tpg_np *tpg_np;
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
+
+ spin_lock(&tpg->tpg_state_lock);
+ if (tpg->tpg_state == TPG_STATE_FREE) {
+ spin_unlock(&tpg->tpg_state_lock);
+ continue;
+ }
+ spin_unlock(&tpg->tpg_state_lock);
+
+ spin_lock(&tpg->tpg_np_lock);
+ list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
+ if (tpg_np->tpg_np == np) {
+ spin_unlock(&tpg->tpg_np_lock);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+ return tpg;
+ }
+ }
+ spin_unlock(&tpg->tpg_np_lock);
+ }
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+
+ return NULL;
+}
+
+int iscsit_get_tpg(
+ struct iscsi_portal_group *tpg)
+{
+ int ret;
+
+ ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
+ return ((ret != 0) || signal_pending(current)) ? -1 : 0;
+}
+
+void iscsit_put_tpg(struct iscsi_portal_group *tpg)
+{
+ mutex_unlock(&tpg->tpg_access_lock);
+}
+
+static void iscsit_clear_tpg_np_login_thread(
+ struct iscsi_tpg_np *tpg_np,
+ struct iscsi_portal_group *tpg)
+{
+ if (!tpg_np->tpg_np) {
+ pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
+ return;
+ }
+
+ iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg);
+}
+
+void iscsit_clear_tpg_np_login_threads(
+ struct iscsi_portal_group *tpg)
+{
+ struct iscsi_tpg_np *tpg_np;
+
+ spin_lock(&tpg->tpg_np_lock);
+ list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
+ if (!tpg_np->tpg_np) {
+ pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
+ continue;
+ }
+ spin_unlock(&tpg->tpg_np_lock);
+ iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
+ spin_lock(&tpg->tpg_np_lock);
+ }
+ spin_unlock(&tpg->tpg_np_lock);
+}
+
+void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
+{
+ iscsi_print_params(tpg->param_list);
+}
+
+static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ a->authentication = TA_AUTHENTICATION;
+ a->login_timeout = TA_LOGIN_TIMEOUT;
+ a->netif_timeout = TA_NETIF_TIMEOUT;
+ a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
+ a->generate_node_acls = TA_GENERATE_NODE_ACLS;
+ a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
+ a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
+ a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
+}
+
+int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
+{
+ if (tpg->tpg_state != TPG_STATE_FREE) {
+ pr_err("Unable to add iSCSI Target Portal Group: %d"
+ " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
+ return -EEXIST;
+ }
+ iscsit_set_default_tpg_attribs(tpg);
+
+ if (iscsi_create_default_params(&tpg->param_list) < 0)
+ goto err_out;
+
+ ISCSI_TPG_ATTRIB(tpg)->tpg = tpg;
+
+ spin_lock(&tpg->tpg_state_lock);
+ tpg->tpg_state = TPG_STATE_INACTIVE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
+ tiqn->tiqn_ntpgs++;
+ pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
+ tiqn->tiqn, tpg->tpgt);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+
+ return 0;
+err_out:
+ if (tpg->param_list) {
+ iscsi_release_param_list(tpg->param_list);
+ tpg->param_list = NULL;
+ }
+ kfree(tpg);
+ return -ENOMEM;
+}
+
+int iscsit_tpg_del_portal_group(
+ struct iscsi_tiqn *tiqn,
+ struct iscsi_portal_group *tpg,
+ int force)
+{
+ u8 old_state = tpg->tpg_state;
+
+ spin_lock(&tpg->tpg_state_lock);
+ tpg->tpg_state = TPG_STATE_INACTIVE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
+ pr_err("Unable to delete iSCSI Target Portal Group:"
+ " %hu while active sessions exist, and force=0\n",
+ tpg->tpgt);
+ tpg->tpg_state = old_state;
+ return -EPERM;
+ }
+
+ core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
+
+ if (tpg->param_list) {
+ iscsi_release_param_list(tpg->param_list);
+ tpg->param_list = NULL;
+ }
+
+ core_tpg_deregister(&tpg->tpg_se_tpg);
+
+ spin_lock(&tpg->tpg_state_lock);
+ tpg->tpg_state = TPG_STATE_FREE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ tiqn->tiqn_ntpgs--;
+ list_del(&tpg->tpg_list);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+
+ pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
+ tiqn->tiqn, tpg->tpgt);
+
+ kfree(tpg);
+ return 0;
+}
+
+int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
+{
+ struct iscsi_param *param;
+ struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
+
+ spin_lock(&tpg->tpg_state_lock);
+ if (tpg->tpg_state == TPG_STATE_ACTIVE) {
+ pr_err("iSCSI target portal group: %hu is already"
+ " active, ignoring request.\n", tpg->tpgt);
+ spin_unlock(&tpg->tpg_state_lock);
+ return -EINVAL;
+ }
+ /*
+ * Make sure that AuthMethod does not contain None as an option
+ * unless explictly disabled. Set the default to CHAP if authentication
+ * is enforced (as per default), and remove the NONE option.
+ */
+ param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
+ if (!param) {
+ spin_unlock(&tpg->tpg_state_lock);
+ return -ENOMEM;
+ }
+
+ if (ISCSI_TPG_ATTRIB(tpg)->authentication) {
+ if (!strcmp(param->value, NONE))
+ if (iscsi_update_param_value(param, CHAP) < 0) {
+ spin_unlock(&tpg->tpg_state_lock);
+ return -ENOMEM;
+ }
+ if (iscsit_ta_authentication(tpg, 1) < 0) {
+ spin_unlock(&tpg->tpg_state_lock);
+ return -ENOMEM;
+ }
+ }
+
+ tpg->tpg_state = TPG_STATE_ACTIVE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ tiqn->tiqn_active_tpgs++;
+ pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
+ tpg->tpgt);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+
+ return 0;
+}
+
+int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
+{
+ struct iscsi_tiqn *tiqn;
+ u8 old_state = tpg->tpg_state;
+
+ spin_lock(&tpg->tpg_state_lock);
+ if (tpg->tpg_state == TPG_STATE_INACTIVE) {
+ pr_err("iSCSI Target Portal Group: %hu is already"
+ " inactive, ignoring request.\n", tpg->tpgt);
+ spin_unlock(&tpg->tpg_state_lock);
+ return -EINVAL;
+ }
+ tpg->tpg_state = TPG_STATE_INACTIVE;
+ spin_unlock(&tpg->tpg_state_lock);
+
+ iscsit_clear_tpg_np_login_threads(tpg);
+
+ if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
+ spin_lock(&tpg->tpg_state_lock);
+ tpg->tpg_state = old_state;
+ spin_unlock(&tpg->tpg_state_lock);
+ pr_err("Unable to disable iSCSI Target Portal Group:"
+ " %hu while active sessions exist, and force=0\n",
+ tpg->tpgt);
+ return -EPERM;
+ }
+
+ tiqn = tpg->tpg_tiqn;
+ if (!tiqn || (tpg == iscsit_global->discovery_tpg))
+ return 0;
+
+ spin_lock(&tiqn->tiqn_tpg_lock);
+ tiqn->tiqn_active_tpgs--;
+ pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
+ tpg->tpgt);
+ spin_unlock(&tiqn->tiqn_tpg_lock);
+
+ return 0;
+}
+
+struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
+ struct iscsi_session *sess)
+{
+ struct se_session *se_sess = sess->se_sess;
+ struct se_node_acl *se_nacl = se_sess->se_node_acl;
+ struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
+ se_node_acl);
+
+ return &acl->node_attrib;
+}
+
+struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
+ struct iscsi_tpg_np *tpg_np,
+ int network_transport)
+{
+ struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
+
+ spin_lock(&tpg_np->tpg_np_parent_lock);
+ list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
+ &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
+ if (tpg_np_child->tpg_np->np_network_transport ==
+ network_transport) {
+ spin_unlock(&tpg_np->tpg_np_parent_lock);
+ return tpg_np_child;
+ }
+ }
+ spin_unlock(&tpg_np->tpg_np_parent_lock);
+
+ return NULL;
+}
+
+struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
+ struct iscsi_portal_group *tpg,
+ struct __kernel_sockaddr_storage *sockaddr,
+ char *ip_str,
+ struct iscsi_tpg_np *tpg_np_parent,
+ int network_transport)
+{
+ struct iscsi_np *np;
+ struct iscsi_tpg_np *tpg_np;
+
+ tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
+ if (!tpg_np) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_tpg_np.\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ np = iscsit_add_np(sockaddr, ip_str, network_transport);
+ if (IS_ERR(np)) {
+ kfree(tpg_np);
+ return ERR_CAST(np);
+ }
+
+ INIT_LIST_HEAD(&tpg_np->tpg_np_list);
+ INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
+ INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
+ spin_lock_init(&tpg_np->tpg_np_parent_lock);
+ tpg_np->tpg_np = np;
+ tpg_np->tpg = tpg;
+
+ spin_lock(&tpg->tpg_np_lock);
+ list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
+ tpg->num_tpg_nps++;
+ if (tpg->tpg_tiqn)
+ tpg->tpg_tiqn->tiqn_num_tpg_nps++;
+ spin_unlock(&tpg->tpg_np_lock);
+
+ if (tpg_np_parent) {
+ tpg_np->tpg_np_parent = tpg_np_parent;
+ spin_lock(&tpg_np_parent->tpg_np_parent_lock);
+ list_add_tail(&tpg_np->tpg_np_child_list,
+ &tpg_np_parent->tpg_np_parent_list);
+ spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
+ }
+
+ pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
+ tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
+ (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
+
+ return tpg_np;
+}
+
+static int iscsit_tpg_release_np(
+ struct iscsi_tpg_np *tpg_np,
+ struct iscsi_portal_group *tpg,
+ struct iscsi_np *np)
+{
+ iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
+
+ pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
+ tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
+ (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
+
+ tpg_np->tpg_np = NULL;
+ tpg_np->tpg = NULL;
+ kfree(tpg_np);
+ /*
+ * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
+ */
+ return iscsit_del_np(np);
+}
+
+int iscsit_tpg_del_network_portal(
+ struct iscsi_portal_group *tpg,
+ struct iscsi_tpg_np *tpg_np)
+{
+ struct iscsi_np *np;
+ struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
+ int ret = 0;
+
+ np = tpg_np->tpg_np;
+ if (!np) {
+ pr_err("Unable to locate struct iscsi_np from"
+ " struct iscsi_tpg_np\n");
+ return -EINVAL;
+ }
+
+ if (!tpg_np->tpg_np_parent) {
+ /*
+ * We are the parent tpg network portal. Release all of the
+ * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
+ * list first.
+ */
+ list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
+ &tpg_np->tpg_np_parent_list,
+ tpg_np_child_list) {
+ ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
+ if (ret < 0)
+ pr_err("iscsit_tpg_del_network_portal()"
+ " failed: %d\n", ret);
+ }
+ } else {
+ /*
+ * We are not the parent ISCSI_TCP tpg network portal. Release
+ * our own network portals from the child list.
+ */
+ spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
+ list_del(&tpg_np->tpg_np_child_list);
+ spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
+ }
+
+ spin_lock(&tpg->tpg_np_lock);
+ list_del(&tpg_np->tpg_np_list);
+ tpg->num_tpg_nps--;
+ if (tpg->tpg_tiqn)
+ tpg->tpg_tiqn->tiqn_num_tpg_nps--;
+ spin_unlock(&tpg->tpg_np_lock);
+
+ return iscsit_tpg_release_np(tpg_np, tpg, np);
+}
+
+int iscsit_tpg_set_initiator_node_queue_depth(
+ struct iscsi_portal_group *tpg,
+ unsigned char *initiatorname,
+ u32 queue_depth,
+ int force)
+{
+ return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
+ initiatorname, queue_depth, force);
+}
+
+int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
+{
+ unsigned char buf1[256], buf2[256], *none = NULL;
+ int len;
+ struct iscsi_param *param;
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((authentication != 1) && (authentication != 0)) {
+ pr_err("Illegal value for authentication parameter:"
+ " %u, ignoring request.\n", authentication);
+ return -1;
+ }
+
+ memset(buf1, 0, sizeof(buf1));
+ memset(buf2, 0, sizeof(buf2));
+
+ param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
+ if (!param)
+ return -EINVAL;
+
+ if (authentication) {
+ snprintf(buf1, sizeof(buf1), "%s", param->value);
+ none = strstr(buf1, NONE);
+ if (!none)
+ goto out;
+ if (!strncmp(none + 4, ",", 1)) {
+ if (!strcmp(buf1, none))
+ sprintf(buf2, "%s", none+5);
+ else {
+ none--;
+ *none = '\0';
+ len = sprintf(buf2, "%s", buf1);
+ none += 5;
+ sprintf(buf2 + len, "%s", none);
+ }
+ } else {
+ none--;
+ *none = '\0';
+ sprintf(buf2, "%s", buf1);
+ }
+ if (iscsi_update_param_value(param, buf2) < 0)
+ return -EINVAL;
+ } else {
+ snprintf(buf1, sizeof(buf1), "%s", param->value);
+ none = strstr(buf1, NONE);
+ if ((none))
+ goto out;
+ strncat(buf1, ",", strlen(","));
+ strncat(buf1, NONE, strlen(NONE));
+ if (iscsi_update_param_value(param, buf1) < 0)
+ return -EINVAL;
+ }
+
+out:
+ a->authentication = authentication;
+ pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
+ a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
+
+ return 0;
+}
+
+int iscsit_ta_login_timeout(
+ struct iscsi_portal_group *tpg,
+ u32 login_timeout)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
+ pr_err("Requested Login Timeout %u larger than maximum"
+ " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
+ return -EINVAL;
+ } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
+ pr_err("Requested Logout Timeout %u smaller than"
+ " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
+ return -EINVAL;
+ }
+
+ a->login_timeout = login_timeout;
+ pr_debug("Set Logout Timeout to %u for Target Portal Group"
+ " %hu\n", a->login_timeout, tpg->tpgt);
+
+ return 0;
+}
+
+int iscsit_ta_netif_timeout(
+ struct iscsi_portal_group *tpg,
+ u32 netif_timeout)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
+ pr_err("Requested Network Interface Timeout %u larger"
+ " than maximum %u\n", netif_timeout,
+ TA_NETIF_TIMEOUT_MAX);
+ return -EINVAL;
+ } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
+ pr_err("Requested Network Interface Timeout %u smaller"
+ " than minimum %u\n", netif_timeout,
+ TA_NETIF_TIMEOUT_MIN);
+ return -EINVAL;
+ }
+
+ a->netif_timeout = netif_timeout;
+ pr_debug("Set Network Interface Timeout to %u for"
+ " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
+
+ return 0;
+}
+
+int iscsit_ta_generate_node_acls(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ a->generate_node_acls = flag;
+ pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
+ tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
+
+ if (flag == 1 && a->cache_dynamic_acls == 0) {
+ pr_debug("Explicitly setting cache_dynamic_acls=1 when "
+ "generate_node_acls=1\n");
+ a->cache_dynamic_acls = 1;
+ }
+
+ return 0;
+}
+
+int iscsit_ta_default_cmdsn_depth(
+ struct iscsi_portal_group *tpg,
+ u32 tcq_depth)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
+ pr_err("Requested Default Queue Depth: %u larger"
+ " than maximum %u\n", tcq_depth,
+ TA_DEFAULT_CMDSN_DEPTH_MAX);
+ return -EINVAL;
+ } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
+ pr_err("Requested Default Queue Depth: %u smaller"
+ " than minimum %u\n", tcq_depth,
+ TA_DEFAULT_CMDSN_DEPTH_MIN);
+ return -EINVAL;
+ }
+
+ a->default_cmdsn_depth = tcq_depth;
+ pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
+ tpg->tpgt, a->default_cmdsn_depth);
+
+ return 0;
+}
+
+int iscsit_ta_cache_dynamic_acls(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (a->generate_node_acls == 1 && flag == 0) {
+ pr_debug("Skipping cache_dynamic_acls=0 when"
+ " generate_node_acls=1\n");
+ return 0;
+ }
+
+ a->cache_dynamic_acls = flag;
+ pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
+ " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
+ "Enabled" : "Disabled");
+
+ return 0;
+}
+
+int iscsit_ta_demo_mode_write_protect(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ a->demo_mode_write_protect = flag;
+ pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
+ tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
+
+ return 0;
+}
+
+int iscsit_ta_prod_mode_write_protect(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ a->prod_mode_write_protect = flag;
+ pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
+ " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
+ "ON" : "OFF");
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.h
new file mode 100644
index 0000000..dda48c1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tpg.h
@@ -0,0 +1,41 @@
+#ifndef ISCSI_TARGET_TPG_H
+#define ISCSI_TARGET_TPG_H
+
+extern struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *, u16);
+extern int iscsit_load_discovery_tpg(void);
+extern void iscsit_release_discovery_tpg(void);
+extern struct iscsi_portal_group *iscsit_get_tpg_from_np(struct iscsi_tiqn *,
+ struct iscsi_np *);
+extern int iscsit_get_tpg(struct iscsi_portal_group *);
+extern void iscsit_put_tpg(struct iscsi_portal_group *);
+extern void iscsit_clear_tpg_np_login_threads(struct iscsi_portal_group *);
+extern void iscsit_tpg_dump_params(struct iscsi_portal_group *);
+extern int iscsit_tpg_add_portal_group(struct iscsi_tiqn *, struct iscsi_portal_group *);
+extern int iscsit_tpg_del_portal_group(struct iscsi_tiqn *, struct iscsi_portal_group *,
+ int);
+extern int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *);
+extern int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *, int);
+extern struct iscsi_node_acl *iscsit_tpg_add_initiator_node_acl(
+ struct iscsi_portal_group *, const char *, u32);
+extern void iscsit_tpg_del_initiator_node_acl(struct iscsi_portal_group *,
+ struct se_node_acl *);
+extern struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(struct iscsi_session *);
+extern void iscsit_tpg_del_external_nps(struct iscsi_tpg_np *);
+extern struct iscsi_tpg_np *iscsit_tpg_locate_child_np(struct iscsi_tpg_np *, int);
+extern struct iscsi_tpg_np *iscsit_tpg_add_network_portal(struct iscsi_portal_group *,
+ struct __kernel_sockaddr_storage *, char *, struct iscsi_tpg_np *,
+ int);
+extern int iscsit_tpg_del_network_portal(struct iscsi_portal_group *,
+ struct iscsi_tpg_np *);
+extern int iscsit_tpg_set_initiator_node_queue_depth(struct iscsi_portal_group *,
+ unsigned char *, u32, int);
+extern int iscsit_ta_authentication(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_login_timeout(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_netif_timeout(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_generate_node_acls(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_default_cmdsn_depth(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_cache_dynamic_acls(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_demo_mode_write_protect(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_prod_mode_write_protect(struct iscsi_portal_group *, u32);
+
+#endif /* ISCSI_TARGET_TPG_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.c
new file mode 100644
index 0000000..4f447fd
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.c
@@ -0,0 +1,527 @@
+/*******************************************************************************
+ * This file contains the iSCSI Login Thread and Thread Queue functions.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/kthread.h>
+#include <linux/list.h>
+#include <linux/bitmap.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_tq.h"
+#include "iscsi_target.h"
+
+static LIST_HEAD(inactive_ts_list);
+static DEFINE_SPINLOCK(inactive_ts_lock);
+static DEFINE_SPINLOCK(ts_bitmap_lock);
+
+extern void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *ts)
+{
+ if (!list_empty(&ts->ts_list)) {
+ WARN_ON(1);
+ return;
+ }
+ spin_lock(&inactive_ts_lock);
+ list_add_tail(&ts->ts_list, &inactive_ts_list);
+ iscsit_global->inactive_ts++;
+ spin_unlock(&inactive_ts_lock);
+}
+
+static struct iscsi_thread_set *iscsi_get_ts_from_inactive_list(void)
+{
+ struct iscsi_thread_set *ts;
+
+ spin_lock(&inactive_ts_lock);
+ if (list_empty(&inactive_ts_list)) {
+ spin_unlock(&inactive_ts_lock);
+ return NULL;
+ }
+
+ list_for_each_entry(ts, &inactive_ts_list, ts_list)
+ break;
+
+ list_del_init(&ts->ts_list);
+ iscsit_global->inactive_ts--;
+ spin_unlock(&inactive_ts_lock);
+
+ return ts;
+}
+
+extern int iscsi_allocate_thread_sets(u32 thread_pair_count)
+{
+ int allocated_thread_pair_count = 0, i, thread_id;
+ struct iscsi_thread_set *ts = NULL;
+
+ for (i = 0; i < thread_pair_count; i++) {
+ ts = kzalloc(sizeof(struct iscsi_thread_set), GFP_KERNEL);
+ if (!ts) {
+ pr_err("Unable to allocate memory for"
+ " thread set.\n");
+ return allocated_thread_pair_count;
+ }
+ /*
+ * Locate the next available regision in the thread_set_bitmap
+ */
+ spin_lock(&ts_bitmap_lock);
+ thread_id = bitmap_find_free_region(iscsit_global->ts_bitmap,
+ iscsit_global->ts_bitmap_count, get_order(1));
+ spin_unlock(&ts_bitmap_lock);
+ if (thread_id < 0) {
+ pr_err("bitmap_find_free_region() failed for"
+ " thread_set_bitmap\n");
+ kfree(ts);
+ return allocated_thread_pair_count;
+ }
+
+ ts->thread_id = thread_id;
+ ts->status = ISCSI_THREAD_SET_FREE;
+ INIT_LIST_HEAD(&ts->ts_list);
+ spin_lock_init(&ts->ts_state_lock);
+ init_completion(&ts->rx_post_start_comp);
+ init_completion(&ts->tx_post_start_comp);
+ init_completion(&ts->rx_restart_comp);
+ init_completion(&ts->tx_restart_comp);
+ init_completion(&ts->rx_start_comp);
+ init_completion(&ts->tx_start_comp);
+
+ ts->create_threads = 1;
+ ts->tx_thread = kthread_run(iscsi_target_tx_thread, ts, "%s",
+ ISCSI_TX_THREAD_NAME);
+ if (IS_ERR(ts->tx_thread)) {
+ dump_stack();
+ pr_err("Unable to start iscsi_target_tx_thread\n");
+ break;
+ }
+
+ ts->rx_thread = kthread_run(iscsi_target_rx_thread, ts, "%s",
+ ISCSI_RX_THREAD_NAME);
+ if (IS_ERR(ts->rx_thread)) {
+ kthread_stop(ts->tx_thread);
+ pr_err("Unable to start iscsi_target_rx_thread\n");
+ break;
+ }
+ ts->create_threads = 0;
+
+ iscsi_add_ts_to_inactive_list(ts);
+ allocated_thread_pair_count++;
+ }
+
+ pr_debug("Spawned %d thread set(s) (%d total threads).\n",
+ allocated_thread_pair_count, allocated_thread_pair_count * 2);
+ return allocated_thread_pair_count;
+}
+
+extern void iscsi_deallocate_thread_sets(void)
+{
+ u32 released_count = 0;
+ struct iscsi_thread_set *ts = NULL;
+
+ while ((ts = iscsi_get_ts_from_inactive_list())) {
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->status = ISCSI_THREAD_SET_DIE;
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ if (ts->rx_thread) {
+ send_sig(SIGINT, ts->rx_thread, 1);
+ kthread_stop(ts->rx_thread);
+ }
+ if (ts->tx_thread) {
+ send_sig(SIGINT, ts->tx_thread, 1);
+ kthread_stop(ts->tx_thread);
+ }
+ /*
+ * Release this thread_id in the thread_set_bitmap
+ */
+ spin_lock(&ts_bitmap_lock);
+ bitmap_release_region(iscsit_global->ts_bitmap,
+ ts->thread_id, get_order(1));
+ spin_unlock(&ts_bitmap_lock);
+
+ released_count++;
+ kfree(ts);
+ }
+
+ if (released_count)
+ pr_debug("Stopped %d thread set(s) (%d total threads)."
+ "\n", released_count, released_count * 2);
+}
+
+static void iscsi_deallocate_extra_thread_sets(void)
+{
+ u32 orig_count, released_count = 0;
+ struct iscsi_thread_set *ts = NULL;
+
+ orig_count = TARGET_THREAD_SET_COUNT;
+
+ while ((iscsit_global->inactive_ts + 1) > orig_count) {
+ ts = iscsi_get_ts_from_inactive_list();
+ if (!ts)
+ break;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->status = ISCSI_THREAD_SET_DIE;
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ if (ts->rx_thread) {
+ send_sig(SIGINT, ts->rx_thread, 1);
+ kthread_stop(ts->rx_thread);
+ }
+ if (ts->tx_thread) {
+ send_sig(SIGINT, ts->tx_thread, 1);
+ kthread_stop(ts->tx_thread);
+ }
+ /*
+ * Release this thread_id in the thread_set_bitmap
+ */
+ spin_lock(&ts_bitmap_lock);
+ bitmap_release_region(iscsit_global->ts_bitmap,
+ ts->thread_id, get_order(1));
+ spin_unlock(&ts_bitmap_lock);
+
+ released_count++;
+ kfree(ts);
+ }
+
+ if (released_count) {
+ pr_debug("Stopped %d thread set(s) (%d total threads)."
+ "\n", released_count, released_count * 2);
+ }
+}
+
+void iscsi_activate_thread_set(struct iscsi_conn *conn, struct iscsi_thread_set *ts)
+{
+ spin_lock_bh(&ts->ts_state_lock);
+ conn->thread_set = ts;
+ ts->conn = conn;
+ spin_unlock_bh(&ts->ts_state_lock);
+ /*
+ * Start up the RX thread and wait on rx_post_start_comp. The RX
+ * Thread will then do the same for the TX Thread in
+ * iscsi_rx_thread_pre_handler().
+ */
+ complete(&ts->rx_start_comp);
+ wait_for_completion(&ts->rx_post_start_comp);
+}
+
+struct iscsi_thread_set *iscsi_get_thread_set(void)
+{
+ int allocate_ts = 0;
+ struct completion comp;
+ struct iscsi_thread_set *ts = NULL;
+ /*
+ * If no inactive thread set is available on the first call to
+ * iscsi_get_ts_from_inactive_list(), sleep for a second and
+ * try again. If still none are available after two attempts,
+ * allocate a set ourselves.
+ */
+get_set:
+ ts = iscsi_get_ts_from_inactive_list();
+ if (!ts) {
+ if (allocate_ts == 2)
+ iscsi_allocate_thread_sets(1);
+
+ init_completion(&comp);
+ wait_for_completion_timeout(&comp, 1 * HZ);
+
+ allocate_ts++;
+ goto get_set;
+ }
+
+ ts->delay_inactive = 1;
+ ts->signal_sent = 0;
+ ts->thread_count = 2;
+ init_completion(&ts->rx_restart_comp);
+ init_completion(&ts->tx_restart_comp);
+
+ return ts;
+}
+
+void iscsi_set_thread_clear(struct iscsi_conn *conn, u8 thread_clear)
+{
+ struct iscsi_thread_set *ts = NULL;
+
+ if (!conn->thread_set) {
+ pr_err("struct iscsi_conn->thread_set is NULL\n");
+ return;
+ }
+ ts = conn->thread_set;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->thread_clear &= ~thread_clear;
+
+ if ((thread_clear & ISCSI_CLEAR_RX_THREAD) &&
+ (ts->blocked_threads & ISCSI_BLOCK_RX_THREAD))
+ complete(&ts->rx_restart_comp);
+ else if ((thread_clear & ISCSI_CLEAR_TX_THREAD) &&
+ (ts->blocked_threads & ISCSI_BLOCK_TX_THREAD))
+ complete(&ts->tx_restart_comp);
+ spin_unlock_bh(&ts->ts_state_lock);
+}
+
+void iscsi_set_thread_set_signal(struct iscsi_conn *conn, u8 signal_sent)
+{
+ struct iscsi_thread_set *ts = NULL;
+
+ if (!conn->thread_set) {
+ pr_err("struct iscsi_conn->thread_set is NULL\n");
+ return;
+ }
+ ts = conn->thread_set;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->signal_sent |= signal_sent;
+ spin_unlock_bh(&ts->ts_state_lock);
+}
+
+int iscsi_release_thread_set(struct iscsi_conn *conn)
+{
+ int thread_called = 0;
+ struct iscsi_thread_set *ts = NULL;
+
+ if (!conn || !conn->thread_set) {
+ pr_err("connection or thread set pointer is NULL\n");
+ BUG();
+ }
+ ts = conn->thread_set;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->status = ISCSI_THREAD_SET_RESET;
+
+ if (!strncmp(current->comm, ISCSI_RX_THREAD_NAME,
+ strlen(ISCSI_RX_THREAD_NAME)))
+ thread_called = ISCSI_RX_THREAD;
+ else if (!strncmp(current->comm, ISCSI_TX_THREAD_NAME,
+ strlen(ISCSI_TX_THREAD_NAME)))
+ thread_called = ISCSI_TX_THREAD;
+
+ if (ts->rx_thread && (thread_called == ISCSI_TX_THREAD) &&
+ (ts->thread_clear & ISCSI_CLEAR_RX_THREAD)) {
+
+ if (!(ts->signal_sent & ISCSI_SIGNAL_RX_THREAD)) {
+ send_sig(SIGINT, ts->rx_thread, 1);
+ ts->signal_sent |= ISCSI_SIGNAL_RX_THREAD;
+ }
+ ts->blocked_threads |= ISCSI_BLOCK_RX_THREAD;
+ spin_unlock_bh(&ts->ts_state_lock);
+ wait_for_completion(&ts->rx_restart_comp);
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->blocked_threads &= ~ISCSI_BLOCK_RX_THREAD;
+ }
+ if (ts->tx_thread && (thread_called == ISCSI_RX_THREAD) &&
+ (ts->thread_clear & ISCSI_CLEAR_TX_THREAD)) {
+
+ if (!(ts->signal_sent & ISCSI_SIGNAL_TX_THREAD)) {
+ send_sig(SIGINT, ts->tx_thread, 1);
+ ts->signal_sent |= ISCSI_SIGNAL_TX_THREAD;
+ }
+ ts->blocked_threads |= ISCSI_BLOCK_TX_THREAD;
+ spin_unlock_bh(&ts->ts_state_lock);
+ wait_for_completion(&ts->tx_restart_comp);
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->blocked_threads &= ~ISCSI_BLOCK_TX_THREAD;
+ }
+
+ ts->conn = NULL;
+ ts->status = ISCSI_THREAD_SET_FREE;
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ return 0;
+}
+
+int iscsi_thread_set_force_reinstatement(struct iscsi_conn *conn)
+{
+ struct iscsi_thread_set *ts;
+
+ if (!conn->thread_set)
+ return -1;
+ ts = conn->thread_set;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ if (ts->status != ISCSI_THREAD_SET_ACTIVE) {
+ spin_unlock_bh(&ts->ts_state_lock);
+ return -1;
+ }
+
+ if (ts->tx_thread && (!(ts->signal_sent & ISCSI_SIGNAL_TX_THREAD))) {
+ send_sig(SIGINT, ts->tx_thread, 1);
+ ts->signal_sent |= ISCSI_SIGNAL_TX_THREAD;
+ }
+ if (ts->rx_thread && (!(ts->signal_sent & ISCSI_SIGNAL_RX_THREAD))) {
+ send_sig(SIGINT, ts->rx_thread, 1);
+ ts->signal_sent |= ISCSI_SIGNAL_RX_THREAD;
+ }
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ return 0;
+}
+
+static void iscsi_check_to_add_additional_sets(void)
+{
+ int thread_sets_add;
+
+ spin_lock(&inactive_ts_lock);
+ thread_sets_add = iscsit_global->inactive_ts;
+ spin_unlock(&inactive_ts_lock);
+ if (thread_sets_add == 1)
+ iscsi_allocate_thread_sets(1);
+}
+
+static int iscsi_signal_thread_pre_handler(struct iscsi_thread_set *ts)
+{
+ spin_lock_bh(&ts->ts_state_lock);
+ if ((ts->status == ISCSI_THREAD_SET_DIE) || signal_pending(current)) {
+ spin_unlock_bh(&ts->ts_state_lock);
+ return -1;
+ }
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ return 0;
+}
+
+struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *ts)
+{
+ int ret;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ if (ts->create_threads) {
+ spin_unlock_bh(&ts->ts_state_lock);
+ goto sleep;
+ }
+
+ flush_signals(current);
+
+ if (ts->delay_inactive && (--ts->thread_count == 0)) {
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ if (!iscsit_global->in_shutdown)
+ iscsi_deallocate_extra_thread_sets();
+
+ iscsi_add_ts_to_inactive_list(ts);
+ spin_lock_bh(&ts->ts_state_lock);
+ }
+
+ if ((ts->status == ISCSI_THREAD_SET_RESET) &&
+ (ts->thread_clear & ISCSI_CLEAR_RX_THREAD))
+ complete(&ts->rx_restart_comp);
+
+ ts->thread_clear &= ~ISCSI_CLEAR_RX_THREAD;
+ spin_unlock_bh(&ts->ts_state_lock);
+sleep:
+ ret = wait_for_completion_interruptible(&ts->rx_start_comp);
+ if (ret != 0)
+ return NULL;
+
+ if (iscsi_signal_thread_pre_handler(ts) < 0)
+ return NULL;
+
+ if (!ts->conn) {
+ pr_err("struct iscsi_thread_set->conn is NULL for"
+ " thread_id: %d, going back to sleep\n", ts->thread_id);
+ goto sleep;
+ }
+ iscsi_check_to_add_additional_sets();
+ /*
+ * The RX Thread starts up the TX Thread and sleeps.
+ */
+ ts->thread_clear |= ISCSI_CLEAR_RX_THREAD;
+ complete(&ts->tx_start_comp);
+ wait_for_completion(&ts->tx_post_start_comp);
+
+ return ts->conn;
+}
+
+struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *ts)
+{
+ int ret;
+
+ spin_lock_bh(&ts->ts_state_lock);
+ if (ts->create_threads) {
+ spin_unlock_bh(&ts->ts_state_lock);
+ goto sleep;
+ }
+
+ flush_signals(current);
+
+ if (ts->delay_inactive && (--ts->thread_count == 0)) {
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ if (!iscsit_global->in_shutdown)
+ iscsi_deallocate_extra_thread_sets();
+
+ iscsi_add_ts_to_inactive_list(ts);
+ spin_lock_bh(&ts->ts_state_lock);
+ }
+ if ((ts->status == ISCSI_THREAD_SET_RESET) &&
+ (ts->thread_clear & ISCSI_CLEAR_TX_THREAD))
+ complete(&ts->tx_restart_comp);
+
+ ts->thread_clear &= ~ISCSI_CLEAR_TX_THREAD;
+ spin_unlock_bh(&ts->ts_state_lock);
+sleep:
+ ret = wait_for_completion_interruptible(&ts->tx_start_comp);
+ if (ret != 0)
+ return NULL;
+
+ if (iscsi_signal_thread_pre_handler(ts) < 0)
+ return NULL;
+
+ if (!ts->conn) {
+ pr_err("struct iscsi_thread_set->conn is NULL for "
+ " thread_id: %d, going back to sleep\n",
+ ts->thread_id);
+ goto sleep;
+ }
+
+ iscsi_check_to_add_additional_sets();
+ /*
+ * From the TX thread, up the tx_post_start_comp that the RX Thread is
+ * sleeping on in iscsi_rx_thread_pre_handler(), then up the
+ * rx_post_start_comp that iscsi_activate_thread_set() is sleeping on.
+ */
+ ts->thread_clear |= ISCSI_CLEAR_TX_THREAD;
+ complete(&ts->tx_post_start_comp);
+ complete(&ts->rx_post_start_comp);
+
+ spin_lock_bh(&ts->ts_state_lock);
+ ts->status = ISCSI_THREAD_SET_ACTIVE;
+ spin_unlock_bh(&ts->ts_state_lock);
+
+ return ts->conn;
+}
+
+int iscsi_thread_set_init(void)
+{
+ int size;
+
+ iscsit_global->ts_bitmap_count = ISCSI_TS_BITMAP_BITS;
+
+ size = BITS_TO_LONGS(iscsit_global->ts_bitmap_count) * sizeof(long);
+ iscsit_global->ts_bitmap = kzalloc(size, GFP_KERNEL);
+ if (!iscsit_global->ts_bitmap) {
+ pr_err("Unable to allocate iscsit_global->ts_bitmap\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void iscsi_thread_set_free(void)
+{
+ kfree(iscsit_global->ts_bitmap);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.h
new file mode 100644
index 0000000..26e6a95
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_tq.h
@@ -0,0 +1,88 @@
+#ifndef ISCSI_THREAD_QUEUE_H
+#define ISCSI_THREAD_QUEUE_H
+
+/*
+ * Defines for thread sets.
+ */
+extern int iscsi_thread_set_force_reinstatement(struct iscsi_conn *);
+extern void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *);
+extern int iscsi_allocate_thread_sets(u32);
+extern void iscsi_deallocate_thread_sets(void);
+extern void iscsi_activate_thread_set(struct iscsi_conn *, struct iscsi_thread_set *);
+extern struct iscsi_thread_set *iscsi_get_thread_set(void);
+extern void iscsi_set_thread_clear(struct iscsi_conn *, u8);
+extern void iscsi_set_thread_set_signal(struct iscsi_conn *, u8);
+extern int iscsi_release_thread_set(struct iscsi_conn *);
+extern struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *);
+extern struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *);
+extern int iscsi_thread_set_init(void);
+extern void iscsi_thread_set_free(void);
+
+extern int iscsi_target_tx_thread(void *);
+extern int iscsi_target_rx_thread(void *);
+
+#define TARGET_THREAD_SET_COUNT 4
+
+#define ISCSI_RX_THREAD 1
+#define ISCSI_TX_THREAD 2
+#define ISCSI_RX_THREAD_NAME "iscsi_trx"
+#define ISCSI_TX_THREAD_NAME "iscsi_ttx"
+#define ISCSI_BLOCK_RX_THREAD 0x1
+#define ISCSI_BLOCK_TX_THREAD 0x2
+#define ISCSI_CLEAR_RX_THREAD 0x1
+#define ISCSI_CLEAR_TX_THREAD 0x2
+#define ISCSI_SIGNAL_RX_THREAD 0x1
+#define ISCSI_SIGNAL_TX_THREAD 0x2
+
+/* struct iscsi_thread_set->status */
+#define ISCSI_THREAD_SET_FREE 1
+#define ISCSI_THREAD_SET_ACTIVE 2
+#define ISCSI_THREAD_SET_DIE 3
+#define ISCSI_THREAD_SET_RESET 4
+#define ISCSI_THREAD_SET_DEALLOCATE_THREADS 5
+
+/* By default allow a maximum of 32K iSCSI connections */
+#define ISCSI_TS_BITMAP_BITS 32768
+
+struct iscsi_thread_set {
+ /* flags used for blocking and restarting sets */
+ int blocked_threads;
+ /* flag for creating threads */
+ int create_threads;
+ /* flag for delaying readding to inactive list */
+ int delay_inactive;
+ /* status for thread set */
+ int status;
+ /* which threads have had signals sent */
+ int signal_sent;
+ /* flag for which threads exited first */
+ int thread_clear;
+ /* Active threads in the thread set */
+ int thread_count;
+ /* Unique thread ID */
+ u32 thread_id;
+ /* pointer to connection if set is active */
+ struct iscsi_conn *conn;
+ /* used for controlling ts state accesses */
+ spinlock_t ts_state_lock;
+ /* Used for rx side post startup */
+ struct completion rx_post_start_comp;
+ /* Used for tx side post startup */
+ struct completion tx_post_start_comp;
+ /* used for restarting thread queue */
+ struct completion rx_restart_comp;
+ /* used for restarting thread queue */
+ struct completion tx_restart_comp;
+ /* used for normal unused blocking */
+ struct completion rx_start_comp;
+ /* used for normal unused blocking */
+ struct completion tx_start_comp;
+ /* OS descriptor for rx thread */
+ struct task_struct *rx_thread;
+ /* OS descriptor for tx thread */
+ struct task_struct *tx_thread;
+ /* struct iscsi_thread_set in list list head*/
+ struct list_head ts_list;
+};
+
+#endif /*** ISCSI_THREAD_QUEUE_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.c b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.c
new file mode 100644
index 0000000..8d57ab3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.c
@@ -0,0 +1,1629 @@
+/*******************************************************************************
+ * This file contains the iSCSI Target specific utility functions.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ******************************************************************************/
+
+#include <linux/list.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_seq_pdu_list.h"
+#include "iscsi_target_datain_values.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_erl1.h"
+#include "iscsi_target_erl2.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_tq.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+
+#define PRINT_BUFF(buff, len) \
+{ \
+ int zzz; \
+ \
+ pr_debug("%d:\n", __LINE__); \
+ for (zzz = 0; zzz < len; zzz++) { \
+ if (zzz % 16 == 0) { \
+ if (zzz) \
+ pr_debug("\n"); \
+ pr_debug("%4i: ", zzz); \
+ } \
+ pr_debug("%02x ", (unsigned char) (buff)[zzz]); \
+ } \
+ if ((len + 1) % 16) \
+ pr_debug("\n"); \
+}
+
+extern struct list_head g_tiqn_list;
+extern spinlock_t tiqn_lock;
+
+/*
+ * Called with cmd->r2t_lock held.
+ */
+int iscsit_add_r2t_to_list(
+ struct iscsi_cmd *cmd,
+ u32 offset,
+ u32 xfer_len,
+ int recovery,
+ u32 r2t_sn)
+{
+ struct iscsi_r2t *r2t;
+
+ r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC);
+ if (!r2t) {
+ pr_err("Unable to allocate memory for struct iscsi_r2t.\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&r2t->r2t_list);
+
+ r2t->recovery_r2t = recovery;
+ r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn;
+ r2t->offset = offset;
+ r2t->xfer_len = xfer_len;
+ list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list);
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T);
+
+ spin_lock_bh(&cmd->r2t_lock);
+ return 0;
+}
+
+struct iscsi_r2t *iscsit_get_r2t_for_eos(
+ struct iscsi_cmd *cmd,
+ u32 offset,
+ u32 length)
+{
+ struct iscsi_r2t *r2t;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
+ if ((r2t->offset <= offset) &&
+ (r2t->offset + r2t->xfer_len) >= (offset + length)) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return r2t;
+ }
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ pr_err("Unable to locate R2T for Offset: %u, Length:"
+ " %u\n", offset, length);
+ return NULL;
+}
+
+struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd)
+{
+ struct iscsi_r2t *r2t;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
+ if (!r2t->sent_r2t) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return r2t;
+ }
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ pr_err("Unable to locate next R2T to send for ITT:"
+ " 0x%08x.\n", cmd->init_task_tag);
+ return NULL;
+}
+
+/*
+ * Called with cmd->r2t_lock held.
+ */
+void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd)
+{
+ list_del(&r2t->r2t_list);
+ kmem_cache_free(lio_r2t_cache, r2t);
+}
+
+void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
+{
+ struct iscsi_r2t *r2t, *r2t_tmp;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list)
+ iscsit_free_r2t(r2t, cmd);
+ spin_unlock_bh(&cmd->r2t_lock);
+}
+
+/*
+ * May be called from software interrupt (timer) context for allocating
+ * iSCSI NopINs.
+ */
+struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
+{
+ struct iscsi_cmd *cmd;
+
+ cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask);
+ if (!cmd) {
+ pr_err("Unable to allocate memory for struct iscsi_cmd.\n");
+ return NULL;
+ }
+
+ cmd->conn = conn;
+ INIT_LIST_HEAD(&cmd->i_list);
+ INIT_LIST_HEAD(&cmd->datain_list);
+ INIT_LIST_HEAD(&cmd->cmd_r2t_list);
+ init_completion(&cmd->reject_comp);
+ spin_lock_init(&cmd->datain_lock);
+ spin_lock_init(&cmd->dataout_timeout_lock);
+ spin_lock_init(&cmd->istate_lock);
+ spin_lock_init(&cmd->error_lock);
+ spin_lock_init(&cmd->r2t_lock);
+
+ return cmd;
+}
+
+/*
+ * Called from iscsi_handle_scsi_cmd()
+ */
+struct iscsi_cmd *iscsit_allocate_se_cmd(
+ struct iscsi_conn *conn,
+ u32 data_length,
+ int data_direction,
+ int iscsi_task_attr)
+{
+ struct iscsi_cmd *cmd;
+ struct se_cmd *se_cmd;
+ int sam_task_attr;
+
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return NULL;
+
+ cmd->data_direction = data_direction;
+ cmd->data_length = data_length;
+ /*
+ * Figure out the SAM Task Attribute for the incoming SCSI CDB
+ */
+ if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) ||
+ (iscsi_task_attr == ISCSI_ATTR_SIMPLE))
+ sam_task_attr = MSG_SIMPLE_TAG;
+ else if (iscsi_task_attr == ISCSI_ATTR_ORDERED)
+ sam_task_attr = MSG_ORDERED_TAG;
+ else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE)
+ sam_task_attr = MSG_HEAD_TAG;
+ else if (iscsi_task_attr == ISCSI_ATTR_ACA)
+ sam_task_attr = MSG_ACA_TAG;
+ else {
+ pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
+ " MSG_SIMPLE_TAG\n", iscsi_task_attr);
+ sam_task_attr = MSG_SIMPLE_TAG;
+ }
+
+ se_cmd = &cmd->se_cmd;
+ /*
+ * Initialize struct se_cmd descriptor from target_core_mod infrastructure
+ */
+ transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops,
+ conn->sess->se_sess, data_length, data_direction,
+ sam_task_attr, &cmd->sense_buffer[0]);
+ return cmd;
+}
+
+struct iscsi_cmd *iscsit_allocate_se_cmd_for_tmr(
+ struct iscsi_conn *conn,
+ u8 function)
+{
+ struct iscsi_cmd *cmd;
+ struct se_cmd *se_cmd;
+ int rc;
+ u8 tcm_function;
+
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return NULL;
+
+ cmd->data_direction = DMA_NONE;
+
+ cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL);
+ if (!cmd->tmr_req) {
+ pr_err("Unable to allocate memory for"
+ " Task Management command!\n");
+ goto out;
+ }
+ /*
+ * TASK_REASSIGN for ERL=2 / connection stays inside of
+ * LIO-Target $FABRIC_MOD
+ */
+ if (function == ISCSI_TM_FUNC_TASK_REASSIGN)
+ return cmd;
+
+ se_cmd = &cmd->se_cmd;
+ /*
+ * Initialize struct se_cmd descriptor from target_core_mod infrastructure
+ */
+ transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops,
+ conn->sess->se_sess, 0, DMA_NONE,
+ MSG_SIMPLE_TAG, &cmd->sense_buffer[0]);
+
+ switch (function) {
+ case ISCSI_TM_FUNC_ABORT_TASK:
+ tcm_function = TMR_ABORT_TASK;
+ break;
+ case ISCSI_TM_FUNC_ABORT_TASK_SET:
+ tcm_function = TMR_ABORT_TASK_SET;
+ break;
+ case ISCSI_TM_FUNC_CLEAR_ACA:
+ tcm_function = TMR_CLEAR_ACA;
+ break;
+ case ISCSI_TM_FUNC_CLEAR_TASK_SET:
+ tcm_function = TMR_CLEAR_TASK_SET;
+ break;
+ case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
+ tcm_function = TMR_LUN_RESET;
+ break;
+ case ISCSI_TM_FUNC_TARGET_WARM_RESET:
+ tcm_function = TMR_TARGET_WARM_RESET;
+ break;
+ case ISCSI_TM_FUNC_TARGET_COLD_RESET:
+ tcm_function = TMR_TARGET_COLD_RESET;
+ break;
+ default:
+ pr_err("Unknown iSCSI TMR Function:"
+ " 0x%02x\n", function);
+ goto out;
+ }
+
+ rc = core_tmr_alloc_req(se_cmd, cmd->tmr_req, tcm_function, GFP_KERNEL);
+ if (rc < 0)
+ goto out;
+
+ cmd->tmr_req->se_tmr_req = se_cmd->se_tmr_req;
+
+ return cmd;
+out:
+ iscsit_release_cmd(cmd);
+ return NULL;
+}
+
+int iscsit_decide_list_to_build(
+ struct iscsi_cmd *cmd,
+ u32 immediate_data_length)
+{
+ struct iscsi_build_list bl;
+ struct iscsi_conn *conn = cmd->conn;
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na;
+
+ if (sess->sess_ops->DataSequenceInOrder &&
+ sess->sess_ops->DataPDUInOrder)
+ return 0;
+
+ if (cmd->data_direction == DMA_NONE)
+ return 0;
+
+ na = iscsit_tpg_get_node_attrib(sess);
+ memset(&bl, 0, sizeof(struct iscsi_build_list));
+
+ if (cmd->data_direction == DMA_FROM_DEVICE) {
+ bl.data_direction = ISCSI_PDU_READ;
+ bl.type = PDULIST_NORMAL;
+ if (na->random_datain_pdu_offsets)
+ bl.randomize |= RANDOM_DATAIN_PDU_OFFSETS;
+ if (na->random_datain_seq_offsets)
+ bl.randomize |= RANDOM_DATAIN_SEQ_OFFSETS;
+ } else {
+ bl.data_direction = ISCSI_PDU_WRITE;
+ bl.immediate_data_length = immediate_data_length;
+ if (na->random_r2t_offsets)
+ bl.randomize |= RANDOM_R2T_OFFSETS;
+
+ if (!cmd->immediate_data && !cmd->unsolicited_data)
+ bl.type = PDULIST_NORMAL;
+ else if (cmd->immediate_data && !cmd->unsolicited_data)
+ bl.type = PDULIST_IMMEDIATE;
+ else if (!cmd->immediate_data && cmd->unsolicited_data)
+ bl.type = PDULIST_UNSOLICITED;
+ else if (cmd->immediate_data && cmd->unsolicited_data)
+ bl.type = PDULIST_IMMEDIATE_AND_UNSOLICITED;
+ }
+
+ return iscsit_do_build_list(cmd, &bl);
+}
+
+struct iscsi_seq *iscsit_get_seq_holder_for_datain(
+ struct iscsi_cmd *cmd,
+ u32 seq_send_order)
+{
+ u32 i;
+
+ for (i = 0; i < cmd->seq_count; i++)
+ if (cmd->seq_list[i].seq_send_order == seq_send_order)
+ return &cmd->seq_list[i];
+
+ return NULL;
+}
+
+struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd)
+{
+ u32 i;
+
+ if (!cmd->seq_list) {
+ pr_err("struct iscsi_cmd->seq_list is NULL!\n");
+ return NULL;
+ }
+
+ for (i = 0; i < cmd->seq_count; i++) {
+ if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
+ continue;
+ if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) {
+ cmd->seq_send_order++;
+ return &cmd->seq_list[i];
+ }
+ }
+
+ return NULL;
+}
+
+struct iscsi_r2t *iscsit_get_holder_for_r2tsn(
+ struct iscsi_cmd *cmd,
+ u32 r2t_sn)
+{
+ struct iscsi_r2t *r2t;
+
+ spin_lock_bh(&cmd->r2t_lock);
+ list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
+ if (r2t->r2t_sn == r2t_sn) {
+ spin_unlock_bh(&cmd->r2t_lock);
+ return r2t;
+ }
+ }
+ spin_unlock_bh(&cmd->r2t_lock);
+
+ return NULL;
+}
+
+static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn)
+{
+ int ret;
+
+ /*
+ * This is the proper method of checking received CmdSN against
+ * ExpCmdSN and MaxCmdSN values, as well as accounting for out
+ * or order CmdSNs due to multiple connection sessions and/or
+ * CRC failures.
+ */
+ if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) {
+ pr_err("Received CmdSN: 0x%08x is greater than"
+ " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn,
+ sess->max_cmd_sn);
+ ret = CMDSN_ERROR_CANNOT_RECOVER;
+
+ } else if (cmdsn == sess->exp_cmd_sn) {
+ sess->exp_cmd_sn++;
+ pr_debug("Received CmdSN matches ExpCmdSN,"
+ " incremented ExpCmdSN to: 0x%08x\n",
+ sess->exp_cmd_sn);
+ ret = CMDSN_NORMAL_OPERATION;
+
+ } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) {
+ pr_debug("Received CmdSN: 0x%08x is greater"
+ " than ExpCmdSN: 0x%08x, not acknowledging.\n",
+ cmdsn, sess->exp_cmd_sn);
+ ret = CMDSN_HIGHER_THAN_EXP;
+
+ } else {
+ pr_err("Received CmdSN: 0x%08x is less than"
+ " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn,
+ sess->exp_cmd_sn);
+ ret = CMDSN_LOWER_THAN_EXP;
+ }
+
+ return ret;
+}
+
+/*
+ * Commands may be received out of order if MC/S is in use.
+ * Ensure they are executed in CmdSN order.
+ */
+int iscsit_sequence_cmd(
+ struct iscsi_conn *conn,
+ struct iscsi_cmd *cmd,
+ u32 cmdsn)
+{
+ int ret;
+ int cmdsn_ret;
+
+ mutex_lock(&conn->sess->cmdsn_mutex);
+
+ cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, cmdsn);
+ switch (cmdsn_ret) {
+ case CMDSN_NORMAL_OPERATION:
+ ret = iscsit_execute_cmd(cmd, 0);
+ if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list))
+ iscsit_execute_ooo_cmdsns(conn->sess);
+ break;
+ case CMDSN_HIGHER_THAN_EXP:
+ ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, cmdsn);
+ break;
+ case CMDSN_LOWER_THAN_EXP:
+ cmd->i_state = ISTATE_REMOVE;
+ iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
+ ret = cmdsn_ret;
+ break;
+ default:
+ ret = cmdsn_ret;
+ break;
+ }
+ mutex_unlock(&conn->sess->cmdsn_mutex);
+
+ return ret;
+}
+
+int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+ struct iscsi_data *hdr = (struct iscsi_data *) buf;
+ u32 payload_length = ntoh24(hdr->dlength);
+
+ if (conn->sess->sess_ops->InitialR2T) {
+ pr_err("Received unexpected unsolicited data"
+ " while InitialR2T=Yes, protocol error.\n");
+ transport_send_check_condition_and_sense(se_cmd,
+ TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
+ return -1;
+ }
+
+ if ((cmd->first_burst_len + payload_length) >
+ conn->sess->sess_ops->FirstBurstLength) {
+ pr_err("Total %u bytes exceeds FirstBurstLength: %u"
+ " for this Unsolicited DataOut Burst.\n",
+ (cmd->first_burst_len + payload_length),
+ conn->sess->sess_ops->FirstBurstLength);
+ transport_send_check_condition_and_sense(se_cmd,
+ TCM_INCORRECT_AMOUNT_OF_DATA, 0);
+ return -1;
+ }
+
+ if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))
+ return 0;
+
+ if (((cmd->first_burst_len + payload_length) != cmd->data_length) &&
+ ((cmd->first_burst_len + payload_length) !=
+ conn->sess->sess_ops->FirstBurstLength)) {
+ pr_err("Unsolicited non-immediate data received %u"
+ " does not equal FirstBurstLength: %u, and does"
+ " not equal ExpXferLen %u.\n",
+ (cmd->first_burst_len + payload_length),
+ conn->sess->sess_ops->FirstBurstLength, cmd->data_length);
+ transport_send_check_condition_and_sense(se_cmd,
+ TCM_INCORRECT_AMOUNT_OF_DATA, 0);
+ return -1;
+ }
+ return 0;
+}
+
+struct iscsi_cmd *iscsit_find_cmd_from_itt(
+ struct iscsi_conn *conn,
+ u32 init_task_tag)
+{
+ struct iscsi_cmd *cmd;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ if (cmd->init_task_tag == init_task_tag) {
+ spin_unlock_bh(&conn->cmd_lock);
+ return cmd;
+ }
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+
+ pr_err("Unable to locate ITT: 0x%08x on CID: %hu",
+ init_task_tag, conn->cid);
+ return NULL;
+}
+
+struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(
+ struct iscsi_conn *conn,
+ u32 init_task_tag,
+ u32 length)
+{
+ struct iscsi_cmd *cmd;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ if (cmd->init_task_tag == init_task_tag) {
+ spin_unlock_bh(&conn->cmd_lock);
+ return cmd;
+ }
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+
+ pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"
+ " dumping payload\n", init_task_tag, conn->cid);
+ if (length)
+ iscsit_dump_data_payload(conn, length, 1);
+
+ return NULL;
+}
+
+struct iscsi_cmd *iscsit_find_cmd_from_ttt(
+ struct iscsi_conn *conn,
+ u32 targ_xfer_tag)
+{
+ struct iscsi_cmd *cmd = NULL;
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
+ if (cmd->targ_xfer_tag == targ_xfer_tag) {
+ spin_unlock_bh(&conn->cmd_lock);
+ return cmd;
+ }
+ }
+ spin_unlock_bh(&conn->cmd_lock);
+
+ pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",
+ targ_xfer_tag, conn->cid);
+ return NULL;
+}
+
+int iscsit_find_cmd_for_recovery(
+ struct iscsi_session *sess,
+ struct iscsi_cmd **cmd_ptr,
+ struct iscsi_conn_recovery **cr_ptr,
+ u32 init_task_tag)
+{
+ struct iscsi_cmd *cmd = NULL;
+ struct iscsi_conn_recovery *cr;
+ /*
+ * Scan through the inactive connection recovery list's command list.
+ * If init_task_tag matches the command is still alligent.
+ */
+ spin_lock(&sess->cr_i_lock);
+ list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_list) {
+ if (cmd->init_task_tag == init_task_tag) {
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ spin_unlock(&sess->cr_i_lock);
+
+ *cr_ptr = cr;
+ *cmd_ptr = cmd;
+ return -2;
+ }
+ }
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ }
+ spin_unlock(&sess->cr_i_lock);
+ /*
+ * Scan through the active connection recovery list's command list.
+ * If init_task_tag matches the command is ready to be reassigned.
+ */
+ spin_lock(&sess->cr_a_lock);
+ list_for_each_entry(cr, &sess->cr_active_list, cr_list) {
+ spin_lock(&cr->conn_recovery_cmd_lock);
+ list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_list) {
+ if (cmd->init_task_tag == init_task_tag) {
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ spin_unlock(&sess->cr_a_lock);
+
+ *cr_ptr = cr;
+ *cmd_ptr = cmd;
+ return 0;
+ }
+ }
+ spin_unlock(&cr->conn_recovery_cmd_lock);
+ }
+ spin_unlock(&sess->cr_a_lock);
+
+ return -1;
+}
+
+void iscsit_add_cmd_to_immediate_queue(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ u8 state)
+{
+ struct iscsi_queue_req *qr;
+
+ qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
+ if (!qr) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_queue_req\n");
+ return;
+ }
+ INIT_LIST_HEAD(&qr->qr_list);
+ qr->cmd = cmd;
+ qr->state = state;
+
+ spin_lock_bh(&conn->immed_queue_lock);
+ list_add_tail(&qr->qr_list, &conn->immed_queue_list);
+ atomic_inc(&cmd->immed_queue_count);
+ atomic_set(&conn->check_immediate_queue, 1);
+ spin_unlock_bh(&conn->immed_queue_lock);
+
+ wake_up(&conn->queues_wq);
+}
+
+struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn)
+{
+ struct iscsi_queue_req *qr;
+
+ spin_lock_bh(&conn->immed_queue_lock);
+ if (list_empty(&conn->immed_queue_list)) {
+ spin_unlock_bh(&conn->immed_queue_lock);
+ return NULL;
+ }
+ list_for_each_entry(qr, &conn->immed_queue_list, qr_list)
+ break;
+
+ list_del(&qr->qr_list);
+ if (qr->cmd)
+ atomic_dec(&qr->cmd->immed_queue_count);
+ spin_unlock_bh(&conn->immed_queue_lock);
+
+ return qr;
+}
+
+static void iscsit_remove_cmd_from_immediate_queue(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_queue_req *qr, *qr_tmp;
+
+ spin_lock_bh(&conn->immed_queue_lock);
+ if (!atomic_read(&cmd->immed_queue_count)) {
+ spin_unlock_bh(&conn->immed_queue_lock);
+ return;
+ }
+
+ list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
+ if (qr->cmd != cmd)
+ continue;
+
+ atomic_dec(&qr->cmd->immed_queue_count);
+ list_del(&qr->qr_list);
+ kmem_cache_free(lio_qr_cache, qr);
+ }
+ spin_unlock_bh(&conn->immed_queue_lock);
+
+ if (atomic_read(&cmd->immed_queue_count)) {
+ pr_err("ITT: 0x%08x immed_queue_count: %d\n",
+ cmd->init_task_tag,
+ atomic_read(&cmd->immed_queue_count));
+ }
+}
+
+void iscsit_add_cmd_to_response_queue(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ u8 state)
+{
+ struct iscsi_queue_req *qr;
+
+ qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
+ if (!qr) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_queue_req\n");
+ return;
+ }
+ INIT_LIST_HEAD(&qr->qr_list);
+ qr->cmd = cmd;
+ qr->state = state;
+
+ spin_lock_bh(&conn->response_queue_lock);
+ list_add_tail(&qr->qr_list, &conn->response_queue_list);
+ atomic_inc(&cmd->response_queue_count);
+ spin_unlock_bh(&conn->response_queue_lock);
+
+ wake_up(&conn->queues_wq);
+}
+
+struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn)
+{
+ struct iscsi_queue_req *qr;
+
+ spin_lock_bh(&conn->response_queue_lock);
+ if (list_empty(&conn->response_queue_list)) {
+ spin_unlock_bh(&conn->response_queue_lock);
+ return NULL;
+ }
+
+ list_for_each_entry(qr, &conn->response_queue_list, qr_list)
+ break;
+
+ list_del(&qr->qr_list);
+ if (qr->cmd)
+ atomic_dec(&qr->cmd->response_queue_count);
+ spin_unlock_bh(&conn->response_queue_lock);
+
+ return qr;
+}
+
+static void iscsit_remove_cmd_from_response_queue(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct iscsi_queue_req *qr, *qr_tmp;
+
+ spin_lock_bh(&conn->response_queue_lock);
+ if (!atomic_read(&cmd->response_queue_count)) {
+ spin_unlock_bh(&conn->response_queue_lock);
+ return;
+ }
+
+ list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
+ qr_list) {
+ if (qr->cmd != cmd)
+ continue;
+
+ atomic_dec(&qr->cmd->response_queue_count);
+ list_del(&qr->qr_list);
+ kmem_cache_free(lio_qr_cache, qr);
+ }
+ spin_unlock_bh(&conn->response_queue_lock);
+
+ if (atomic_read(&cmd->response_queue_count)) {
+ pr_err("ITT: 0x%08x response_queue_count: %d\n",
+ cmd->init_task_tag,
+ atomic_read(&cmd->response_queue_count));
+ }
+}
+
+bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn)
+{
+ bool empty;
+
+ spin_lock_bh(&conn->immed_queue_lock);
+ empty = list_empty(&conn->immed_queue_list);
+ spin_unlock_bh(&conn->immed_queue_lock);
+
+ if (!empty)
+ return empty;
+
+ spin_lock_bh(&conn->response_queue_lock);
+ empty = list_empty(&conn->response_queue_list);
+ spin_unlock_bh(&conn->response_queue_lock);
+
+ return empty;
+}
+
+void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn)
+{
+ struct iscsi_queue_req *qr, *qr_tmp;
+
+ spin_lock_bh(&conn->immed_queue_lock);
+ list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
+ list_del(&qr->qr_list);
+ if (qr->cmd)
+ atomic_dec(&qr->cmd->immed_queue_count);
+
+ kmem_cache_free(lio_qr_cache, qr);
+ }
+ spin_unlock_bh(&conn->immed_queue_lock);
+
+ spin_lock_bh(&conn->response_queue_lock);
+ list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
+ qr_list) {
+ list_del(&qr->qr_list);
+ if (qr->cmd)
+ atomic_dec(&qr->cmd->response_queue_count);
+
+ kmem_cache_free(lio_qr_cache, qr);
+ }
+ spin_unlock_bh(&conn->response_queue_lock);
+}
+
+void iscsit_release_cmd(struct iscsi_cmd *cmd)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ int i;
+
+ iscsit_free_r2ts_from_list(cmd);
+ iscsit_free_all_datain_reqs(cmd);
+
+ kfree(cmd->buf_ptr);
+ kfree(cmd->pdu_list);
+ kfree(cmd->seq_list);
+ kfree(cmd->tmr_req);
+ kfree(cmd->iov_data);
+
+ for (i = 0; i < cmd->t_mem_sg_nents; i++)
+ __free_page(sg_page(&cmd->t_mem_sg[i]));
+
+ kfree(cmd->t_mem_sg);
+
+ if (conn) {
+ iscsit_remove_cmd_from_immediate_queue(cmd, conn);
+ iscsit_remove_cmd_from_response_queue(cmd, conn);
+ }
+
+ kmem_cache_free(lio_cmd_cache, cmd);
+}
+
+void iscsit_free_cmd(struct iscsi_cmd *cmd)
+{
+ /*
+ * Determine if a struct se_cmd is assoicated with
+ * this struct iscsi_cmd.
+ */
+ switch (cmd->iscsi_opcode) {
+ case ISCSI_OP_SCSI_CMD:
+ case ISCSI_OP_SCSI_TMFUNC:
+ transport_generic_free_cmd(&cmd->se_cmd, 1);
+ break;
+ case ISCSI_OP_REJECT:
+ /*
+ * Handle special case for REJECT when iscsi_add_reject*() has
+ * overwritten the original iscsi_opcode assignment, and the
+ * associated cmd->se_cmd needs to be released.
+ */
+ if (cmd->se_cmd.se_tfo != NULL) {
+ transport_generic_free_cmd(&cmd->se_cmd, 1);
+ break;
+ }
+ /* Fall-through */
+ default:
+ iscsit_release_cmd(cmd);
+ break;
+ }
+}
+
+int iscsit_check_session_usage_count(struct iscsi_session *sess)
+{
+ spin_lock_bh(&sess->session_usage_lock);
+ if (sess->session_usage_count != 0) {
+ sess->session_waiting_on_uc = 1;
+ spin_unlock_bh(&sess->session_usage_lock);
+ if (in_interrupt())
+ return 2;
+
+ wait_for_completion(&sess->session_waiting_on_uc_comp);
+ return 1;
+ }
+ spin_unlock_bh(&sess->session_usage_lock);
+
+ return 0;
+}
+
+void iscsit_dec_session_usage_count(struct iscsi_session *sess)
+{
+ spin_lock_bh(&sess->session_usage_lock);
+ sess->session_usage_count--;
+
+ if (!sess->session_usage_count && sess->session_waiting_on_uc)
+ complete(&sess->session_waiting_on_uc_comp);
+
+ spin_unlock_bh(&sess->session_usage_lock);
+}
+
+void iscsit_inc_session_usage_count(struct iscsi_session *sess)
+{
+ spin_lock_bh(&sess->session_usage_lock);
+ sess->session_usage_count++;
+ spin_unlock_bh(&sess->session_usage_lock);
+}
+
+/*
+ * Setup conn->if_marker and conn->of_marker values based upon
+ * the initial marker-less interval. (see iSCSI v19 A.2)
+ */
+int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn)
+{
+ int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0;
+ /*
+ * IFMarkInt and OFMarkInt are negotiated as 32-bit words.
+ */
+ u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4);
+ u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4);
+
+ if (conn->conn_ops->OFMarker) {
+ /*
+ * Account for the first Login Command received not
+ * via iscsi_recv_msg().
+ */
+ conn->of_marker += ISCSI_HDR_LEN;
+ if (conn->of_marker <= OFMarkInt) {
+ conn->of_marker = (OFMarkInt - conn->of_marker);
+ } else {
+ login_ofmarker_count = (conn->of_marker / OFMarkInt);
+ next_marker = (OFMarkInt * (login_ofmarker_count + 1)) +
+ (login_ofmarker_count * MARKER_SIZE);
+ conn->of_marker = (next_marker - conn->of_marker);
+ }
+ conn->of_marker_offset = 0;
+ pr_debug("Setting OFMarker value to %u based on Initial"
+ " Markerless Interval.\n", conn->of_marker);
+ }
+
+ if (conn->conn_ops->IFMarker) {
+ if (conn->if_marker <= IFMarkInt) {
+ conn->if_marker = (IFMarkInt - conn->if_marker);
+ } else {
+ login_ifmarker_count = (conn->if_marker / IFMarkInt);
+ next_marker = (IFMarkInt * (login_ifmarker_count + 1)) +
+ (login_ifmarker_count * MARKER_SIZE);
+ conn->if_marker = (next_marker - conn->if_marker);
+ }
+ pr_debug("Setting IFMarker value to %u based on Initial"
+ " Markerless Interval.\n", conn->if_marker);
+ }
+
+ return 0;
+}
+
+struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid)
+{
+ struct iscsi_conn *conn;
+
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
+ if ((conn->cid == cid) &&
+ (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) {
+ iscsit_inc_conn_usage_count(conn);
+ spin_unlock_bh(&sess->conn_lock);
+ return conn;
+ }
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ return NULL;
+}
+
+struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid)
+{
+ struct iscsi_conn *conn;
+
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
+ if (conn->cid == cid) {
+ iscsit_inc_conn_usage_count(conn);
+ spin_lock(&conn->state_lock);
+ atomic_set(&conn->connection_wait_rcfr, 1);
+ spin_unlock(&conn->state_lock);
+ spin_unlock_bh(&sess->conn_lock);
+ return conn;
+ }
+ }
+ spin_unlock_bh(&sess->conn_lock);
+
+ return NULL;
+}
+
+void iscsit_check_conn_usage_count(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->conn_usage_lock);
+ if (conn->conn_usage_count != 0) {
+ conn->conn_waiting_on_uc = 1;
+ spin_unlock_bh(&conn->conn_usage_lock);
+
+ wait_for_completion(&conn->conn_waiting_on_uc_comp);
+ return;
+ }
+ spin_unlock_bh(&conn->conn_usage_lock);
+}
+
+void iscsit_dec_conn_usage_count(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->conn_usage_lock);
+ conn->conn_usage_count--;
+
+ if (!conn->conn_usage_count && conn->conn_waiting_on_uc)
+ complete(&conn->conn_waiting_on_uc_comp);
+
+ spin_unlock_bh(&conn->conn_usage_lock);
+}
+
+void iscsit_inc_conn_usage_count(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->conn_usage_lock);
+ conn->conn_usage_count++;
+ spin_unlock_bh(&conn->conn_usage_lock);
+}
+
+static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
+{
+ u8 state;
+ struct iscsi_cmd *cmd;
+
+ cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC);
+ if (!cmd)
+ return -1;
+
+ cmd->iscsi_opcode = ISCSI_OP_NOOP_IN;
+ state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :
+ ISTATE_SEND_NOPIN_NO_RESPONSE;
+ cmd->init_task_tag = 0xFFFFFFFF;
+ spin_lock_bh(&conn->sess->ttt_lock);
+ cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ :
+ 0xFFFFFFFF;
+ if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF))
+ cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
+ spin_unlock_bh(&conn->sess->ttt_lock);
+
+ spin_lock_bh(&conn->cmd_lock);
+ list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ if (want_response)
+ iscsit_start_nopin_response_timer(conn);
+ iscsit_add_cmd_to_immediate_queue(cmd, conn, state);
+
+ return 0;
+}
+
+static void iscsit_handle_nopin_response_timeout(unsigned long data)
+{
+ struct iscsi_conn *conn = (struct iscsi_conn *) data;
+
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ iscsit_dec_conn_usage_count(conn);
+ return;
+ }
+
+ pr_debug("Did not receive response to NOPIN on CID: %hu on"
+ " SID: %u, failing connection.\n", conn->cid,
+ conn->sess->sid);
+ conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+
+ {
+ struct iscsi_portal_group *tpg = conn->sess->tpg;
+ struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
+
+ if (tiqn) {
+ spin_lock_bh(&tiqn->sess_err_stats.lock);
+ strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
+ conn->sess->sess_ops->InitiatorName);
+ tiqn->sess_err_stats.last_sess_failure_type =
+ ISCSI_SESS_ERR_CXN_TIMEOUT;
+ tiqn->sess_err_stats.cxn_timeout_errors++;
+ conn->sess->conn_timeout_errors++;
+ spin_unlock_bh(&tiqn->sess_err_stats.lock);
+ }
+ }
+
+ iscsit_cause_connection_reinstatement(conn, 0);
+ iscsit_dec_conn_usage_count(conn);
+}
+
+void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ return;
+ }
+
+ mod_timer(&conn->nopin_response_timer,
+ (get_jiffies_64() + na->nopin_response_timeout * HZ));
+ spin_unlock_bh(&conn->nopin_timer_lock);
+}
+
+/*
+ * Called with conn->nopin_timer_lock held.
+ */
+void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ return;
+ }
+
+ init_timer(&conn->nopin_response_timer);
+ conn->nopin_response_timer.expires =
+ (get_jiffies_64() + na->nopin_response_timeout * HZ);
+ conn->nopin_response_timer.data = (unsigned long)conn;
+ conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout;
+ conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
+ conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&conn->nopin_response_timer);
+
+ pr_debug("Started NOPIN Response Timer on CID: %d to %u"
+ " seconds\n", conn->cid, na->nopin_response_timeout);
+ spin_unlock_bh(&conn->nopin_timer_lock);
+}
+
+void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ return;
+ }
+ conn->nopin_response_timer_flags |= ISCSI_TF_STOP;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+
+ del_timer_sync(&conn->nopin_response_timer);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+}
+
+static void iscsit_handle_nopin_timeout(unsigned long data)
+{
+ struct iscsi_conn *conn = (struct iscsi_conn *) data;
+
+ iscsit_inc_conn_usage_count(conn);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (conn->nopin_timer_flags & ISCSI_TF_STOP) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ iscsit_dec_conn_usage_count(conn);
+ return;
+ }
+ conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+
+ iscsit_add_nopin(conn, 1);
+ iscsit_dec_conn_usage_count(conn);
+}
+
+/*
+ * Called with conn->nopin_timer_lock held.
+ */
+void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+ /*
+ * NOPIN timeout is disabled.
+ */
+ if (!na->nopin_timeout)
+ return;
+
+ if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
+ return;
+
+ init_timer(&conn->nopin_timer);
+ conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
+ conn->nopin_timer.data = (unsigned long)conn;
+ conn->nopin_timer.function = iscsit_handle_nopin_timeout;
+ conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
+ conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&conn->nopin_timer);
+
+ pr_debug("Started NOPIN Timer on CID: %d at %u second"
+ " interval\n", conn->cid, na->nopin_timeout);
+}
+
+void iscsit_start_nopin_timer(struct iscsi_conn *conn)
+{
+ struct iscsi_session *sess = conn->sess;
+ struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
+ /*
+ * NOPIN timeout is disabled..
+ */
+ if (!na->nopin_timeout)
+ return;
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ return;
+ }
+
+ init_timer(&conn->nopin_timer);
+ conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
+ conn->nopin_timer.data = (unsigned long)conn;
+ conn->nopin_timer.function = iscsit_handle_nopin_timeout;
+ conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
+ conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
+ add_timer(&conn->nopin_timer);
+
+ pr_debug("Started NOPIN Timer on CID: %d at %u second"
+ " interval\n", conn->cid, na->nopin_timeout);
+ spin_unlock_bh(&conn->nopin_timer_lock);
+}
+
+void iscsit_stop_nopin_timer(struct iscsi_conn *conn)
+{
+ spin_lock_bh(&conn->nopin_timer_lock);
+ if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) {
+ spin_unlock_bh(&conn->nopin_timer_lock);
+ return;
+ }
+ conn->nopin_timer_flags |= ISCSI_TF_STOP;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+
+ del_timer_sync(&conn->nopin_timer);
+
+ spin_lock_bh(&conn->nopin_timer_lock);
+ conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
+ spin_unlock_bh(&conn->nopin_timer_lock);
+}
+
+int iscsit_send_tx_data(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn,
+ int use_misc)
+{
+ int tx_sent, tx_size;
+ u32 iov_count;
+ struct kvec *iov;
+
+send_data:
+ tx_size = cmd->tx_size;
+
+ if (!use_misc) {
+ iov = &cmd->iov_data[0];
+ iov_count = cmd->iov_data_count;
+ } else {
+ iov = &cmd->iov_misc[0];
+ iov_count = cmd->iov_misc_count;
+ }
+
+ tx_sent = tx_data(conn, &iov[0], iov_count, tx_size);
+ if (tx_size != tx_sent) {
+ if (tx_sent == -EAGAIN) {
+ pr_err("tx_data() returned -EAGAIN\n");
+ goto send_data;
+ } else
+ return -1;
+ }
+ cmd->tx_size = 0;
+
+ return 0;
+}
+
+int iscsit_fe_sendpage_sg(
+ struct iscsi_cmd *cmd,
+ struct iscsi_conn *conn)
+{
+ struct scatterlist *sg = cmd->first_data_sg;
+ struct kvec iov;
+ u32 tx_hdr_size, data_len;
+ u32 offset = cmd->first_data_sg_off;
+ int tx_sent, iov_off;
+
+send_hdr:
+ tx_hdr_size = ISCSI_HDR_LEN;
+ if (conn->conn_ops->HeaderDigest)
+ tx_hdr_size += ISCSI_CRC_LEN;
+
+ iov.iov_base = cmd->pdu;
+ iov.iov_len = tx_hdr_size;
+
+ tx_sent = tx_data(conn, &iov, 1, tx_hdr_size);
+ if (tx_hdr_size != tx_sent) {
+ if (tx_sent == -EAGAIN) {
+ pr_err("tx_data() returned -EAGAIN\n");
+ goto send_hdr;
+ }
+ return -1;
+ }
+
+ data_len = cmd->tx_size - tx_hdr_size - cmd->padding;
+ /*
+ * Set iov_off used by padding and data digest tx_data() calls below
+ * in order to determine proper offset into cmd->iov_data[]
+ */
+ if (conn->conn_ops->DataDigest) {
+ data_len -= ISCSI_CRC_LEN;
+ if (cmd->padding)
+ iov_off = (cmd->iov_data_count - 2);
+ else
+ iov_off = (cmd->iov_data_count - 1);
+ } else {
+ iov_off = (cmd->iov_data_count - 1);
+ }
+ /*
+ * Perform sendpage() for each page in the scatterlist
+ */
+ while (data_len) {
+ u32 space = (sg->length - offset);
+ u32 sub_len = min_t(u32, data_len, space);
+send_pg:
+ tx_sent = conn->sock->ops->sendpage(conn->sock,
+ sg_page(sg), sg->offset + offset, sub_len, 0);
+ if (tx_sent != sub_len) {
+ if (tx_sent == -EAGAIN) {
+ pr_err("tcp_sendpage() returned"
+ " -EAGAIN\n");
+ goto send_pg;
+ }
+
+ pr_err("tcp_sendpage() failure: %d\n",
+ tx_sent);
+ return -1;
+ }
+
+ data_len -= sub_len;
+ offset = 0;
+ sg = sg_next(sg);
+ }
+
+send_padding:
+ if (cmd->padding) {
+ struct kvec *iov_p = &cmd->iov_data[iov_off++];
+
+ tx_sent = tx_data(conn, iov_p, 1, cmd->padding);
+ if (cmd->padding != tx_sent) {
+ if (tx_sent == -EAGAIN) {
+ pr_err("tx_data() returned -EAGAIN\n");
+ goto send_padding;
+ }
+ return -1;
+ }
+ }
+
+send_datacrc:
+ if (conn->conn_ops->DataDigest) {
+ struct kvec *iov_d = &cmd->iov_data[iov_off];
+
+ tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN);
+ if (ISCSI_CRC_LEN != tx_sent) {
+ if (tx_sent == -EAGAIN) {
+ pr_err("tx_data() returned -EAGAIN\n");
+ goto send_datacrc;
+ }
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU
+ * back to the Initiator when an expection condition occurs with the
+ * errors set in status_class and status_detail.
+ *
+ * Parameters: iSCSI Connection, Status Class, Status Detail.
+ * Returns: 0 on success, -1 on error.
+ */
+int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
+{
+ u8 iscsi_hdr[ISCSI_HDR_LEN];
+ int err;
+ struct kvec iov;
+ struct iscsi_login_rsp *hdr;
+
+ iscsit_collect_login_stats(conn, status_class, status_detail);
+
+ memset(&iov, 0, sizeof(struct kvec));
+ memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN);
+
+ hdr = (struct iscsi_login_rsp *)&iscsi_hdr;
+ hdr->opcode = ISCSI_OP_LOGIN_RSP;
+ hdr->status_class = status_class;
+ hdr->status_detail = status_detail;
+ hdr->itt = cpu_to_be32(conn->login_itt);
+
+ iov.iov_base = &iscsi_hdr;
+ iov.iov_len = ISCSI_HDR_LEN;
+
+ PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN);
+
+ err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN);
+ if (err != ISCSI_HDR_LEN) {
+ pr_err("tx_data returned less than expected\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+void iscsit_print_session_params(struct iscsi_session *sess)
+{
+ struct iscsi_conn *conn;
+
+ pr_debug("-----------------------------[Session Params for"
+ " SID: %u]-----------------------------\n", sess->sid);
+ spin_lock_bh(&sess->conn_lock);
+ list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
+ iscsi_dump_conn_ops(conn->conn_ops);
+ spin_unlock_bh(&sess->conn_lock);
+
+ iscsi_dump_sess_ops(sess->sess_ops);
+}
+
+static int iscsit_do_rx_data(
+ struct iscsi_conn *conn,
+ struct iscsi_data_count *count)
+{
+ int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len;
+ struct kvec *iov_p;
+ struct msghdr msg;
+
+ if (!conn || !conn->sock || !conn->conn_ops)
+ return -1;
+
+ memset(&msg, 0, sizeof(struct msghdr));
+
+ iov_p = count->iov;
+ iov_len = count->iov_count;
+
+ while (total_rx < data) {
+ rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len,
+ (data - total_rx), MSG_WAITALL);
+ if (rx_loop <= 0) {
+ pr_debug("rx_loop: %d total_rx: %d\n",
+ rx_loop, total_rx);
+ return rx_loop;
+ }
+ total_rx += rx_loop;
+ pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",
+ rx_loop, total_rx, data);
+ }
+
+ return total_rx;
+}
+
+static int iscsit_do_tx_data(
+ struct iscsi_conn *conn,
+ struct iscsi_data_count *count)
+{
+ int ret, iov_len;
+ struct kvec *iov_p;
+ struct msghdr msg;
+
+ if (!conn || !conn->sock || !conn->conn_ops)
+ return -1;
+
+ if (count->data_length <= 0) {
+ pr_err("Data length is: %d\n", count->data_length);
+ return -1;
+ }
+
+ memset(&msg, 0, sizeof(struct msghdr));
+
+ iov_p = count->iov;
+ iov_len = count->iov_count;
+
+ ret = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len,
+ count->data_length);
+ if (ret != count->data_length) {
+ pr_err("Unexpected ret: %d send data %d\n",
+ ret, count->data_length);
+ return -EPIPE;
+ }
+ pr_debug("ret: %d, sent data: %d\n", ret, count->data_length);
+
+ return ret;
+}
+
+int rx_data(
+ struct iscsi_conn *conn,
+ struct kvec *iov,
+ int iov_count,
+ int data)
+{
+ struct iscsi_data_count c;
+
+ if (!conn || !conn->sock || !conn->conn_ops)
+ return -1;
+
+ memset(&c, 0, sizeof(struct iscsi_data_count));
+ c.iov = iov;
+ c.iov_count = iov_count;
+ c.data_length = data;
+ c.type = ISCSI_RX_DATA;
+
+ return iscsit_do_rx_data(conn, &c);
+}
+
+int tx_data(
+ struct iscsi_conn *conn,
+ struct kvec *iov,
+ int iov_count,
+ int data)
+{
+ struct iscsi_data_count c;
+
+ if (!conn || !conn->sock || !conn->conn_ops)
+ return -1;
+
+ memset(&c, 0, sizeof(struct iscsi_data_count));
+ c.iov = iov;
+ c.iov_count = iov_count;
+ c.data_length = data;
+ c.type = ISCSI_TX_DATA;
+
+ return iscsit_do_tx_data(conn, &c);
+}
+
+void iscsit_collect_login_stats(
+ struct iscsi_conn *conn,
+ u8 status_class,
+ u8 status_detail)
+{
+ struct iscsi_param *intrname = NULL;
+ struct iscsi_tiqn *tiqn;
+ struct iscsi_login_stats *ls;
+
+ tiqn = iscsit_snmp_get_tiqn(conn);
+ if (!tiqn)
+ return;
+
+ ls = &tiqn->login_stats;
+
+ spin_lock(&ls->lock);
+ if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) &&
+ ((get_jiffies_64() - ls->last_fail_time) < 10)) {
+ /* We already have the failure info for this login */
+ spin_unlock(&ls->lock);
+ return;
+ }
+
+ if (status_class == ISCSI_STATUS_CLS_SUCCESS)
+ ls->accepts++;
+ else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {
+ ls->redirects++;
+ ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT;
+ } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
+ (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) {
+ ls->authenticate_fails++;
+ ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE;
+ } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
+ (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) {
+ ls->authorize_fails++;
+ ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE;
+ } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
+ (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) {
+ ls->negotiate_fails++;
+ ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE;
+ } else {
+ ls->other_fails++;
+ ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER;
+ }
+
+ /* Save initiator name, ip address and time, if it is a failed login */
+ if (status_class != ISCSI_STATUS_CLS_SUCCESS) {
+ if (conn->param_list)
+ intrname = iscsi_find_param_from_key(INITIATORNAME,
+ conn->param_list);
+ strcpy(ls->last_intr_fail_name,
+ (intrname ? intrname->value : "Unknown"));
+
+ ls->last_intr_fail_ip_family = conn->sock->sk->sk_family;
+ snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE,
+ "%s", conn->login_ip);
+ ls->last_fail_time = get_jiffies_64();
+ }
+
+ spin_unlock(&ls->lock);
+}
+
+struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn)
+{
+ struct iscsi_portal_group *tpg;
+
+ if (!conn || !conn->sess)
+ return NULL;
+
+ tpg = conn->sess->tpg;
+ if (!tpg)
+ return NULL;
+
+ if (!tpg->tpg_tiqn)
+ return NULL;
+
+ return tpg->tpg_tiqn;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.h b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.h
new file mode 100644
index 0000000..cfac698
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/iscsi/iscsi_target_util.h
@@ -0,0 +1,62 @@
+#ifndef ISCSI_TARGET_UTIL_H
+#define ISCSI_TARGET_UTIL_H
+
+#define MARKER_SIZE 8
+
+extern int iscsit_add_r2t_to_list(struct iscsi_cmd *, u32, u32, int, u32);
+extern struct iscsi_r2t *iscsit_get_r2t_for_eos(struct iscsi_cmd *, u32, u32);
+extern struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *);
+extern void iscsit_free_r2t(struct iscsi_r2t *, struct iscsi_cmd *);
+extern void iscsit_free_r2ts_from_list(struct iscsi_cmd *);
+extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
+extern struct iscsi_cmd *iscsit_allocate_se_cmd(struct iscsi_conn *, u32, int, int);
+extern struct iscsi_cmd *iscsit_allocate_se_cmd_for_tmr(struct iscsi_conn *, u8);
+extern int iscsit_decide_list_to_build(struct iscsi_cmd *, u32);
+extern struct iscsi_seq *iscsit_get_seq_holder_for_datain(struct iscsi_cmd *, u32);
+extern struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *);
+extern struct iscsi_r2t *iscsit_get_holder_for_r2tsn(struct iscsi_cmd *, u32);
+int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, u32 cmdsn);
+extern int iscsit_check_unsolicited_dataout(struct iscsi_cmd *, unsigned char *);
+extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, u32);
+extern struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(struct iscsi_conn *,
+ u32, u32);
+extern struct iscsi_cmd *iscsit_find_cmd_from_ttt(struct iscsi_conn *, u32);
+extern int iscsit_find_cmd_for_recovery(struct iscsi_session *, struct iscsi_cmd **,
+ struct iscsi_conn_recovery **, u32);
+extern void iscsit_add_cmd_to_immediate_queue(struct iscsi_cmd *, struct iscsi_conn *, u8);
+extern struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *);
+extern void iscsit_add_cmd_to_response_queue(struct iscsi_cmd *, struct iscsi_conn *, u8);
+extern struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *);
+extern void iscsit_remove_cmd_from_tx_queues(struct iscsi_cmd *, struct iscsi_conn *);
+extern bool iscsit_conn_all_queues_empty(struct iscsi_conn *);
+extern void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *);
+extern void iscsit_release_cmd(struct iscsi_cmd *);
+extern void iscsit_free_cmd(struct iscsi_cmd *);
+extern int iscsit_check_session_usage_count(struct iscsi_session *);
+extern void iscsit_dec_session_usage_count(struct iscsi_session *);
+extern void iscsit_inc_session_usage_count(struct iscsi_session *);
+extern int iscsit_set_sync_and_steering_values(struct iscsi_conn *);
+extern struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *, u16);
+extern struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *, u16);
+extern void iscsit_check_conn_usage_count(struct iscsi_conn *);
+extern void iscsit_dec_conn_usage_count(struct iscsi_conn *);
+extern void iscsit_inc_conn_usage_count(struct iscsi_conn *);
+extern void iscsit_mod_nopin_response_timer(struct iscsi_conn *);
+extern void iscsit_start_nopin_response_timer(struct iscsi_conn *);
+extern void iscsit_stop_nopin_response_timer(struct iscsi_conn *);
+extern void __iscsit_start_nopin_timer(struct iscsi_conn *);
+extern void iscsit_start_nopin_timer(struct iscsi_conn *);
+extern void iscsit_stop_nopin_timer(struct iscsi_conn *);
+extern int iscsit_send_tx_data(struct iscsi_cmd *, struct iscsi_conn *, int);
+extern int iscsit_fe_sendpage_sg(struct iscsi_cmd *, struct iscsi_conn *);
+extern int iscsit_tx_login_rsp(struct iscsi_conn *, u8, u8);
+extern void iscsit_print_session_params(struct iscsi_session *);
+extern int iscsit_print_dev_to_proc(char *, char **, off_t, int);
+extern int iscsit_print_sessions_to_proc(char *, char **, off_t, int);
+extern int iscsit_print_tpg_to_proc(char *, char **, off_t, int);
+extern int rx_data(struct iscsi_conn *, struct kvec *, int, int);
+extern int tx_data(struct iscsi_conn *, struct kvec *, int, int);
+extern void iscsit_collect_login_stats(struct iscsi_conn *, u8, u8);
+extern struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *);
+
+#endif /*** ISCSI_TARGET_UTIL_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/loopback/Kconfig b/ap/os/linux/linux-3.4.x/drivers/target/loopback/Kconfig
new file mode 100644
index 0000000..abe8ecb
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/loopback/Kconfig
@@ -0,0 +1,5 @@
+config LOOPBACK_TARGET
+ tristate "TCM Virtual SAS target and Linux/SCSI LDD fabric loopback module"
+ help
+ Say Y here to enable the TCM Virtual SAS target and Linux/SCSI LLD
+ fabric loopback module.
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/loopback/Makefile b/ap/os/linux/linux-3.4.x/drivers/target/loopback/Makefile
new file mode 100644
index 0000000..6abebdf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/loopback/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_LOOPBACK_TARGET) += tcm_loop.o
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.c b/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.c
new file mode 100644
index 0000000..a9b4eee
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.c
@@ -0,0 +1,1484 @@
+/*******************************************************************************
+ *
+ * This file contains the Linux/SCSI LLD virtual SCSI initiator driver
+ * for emulated SAS initiator ports
+ *
+ * © Copyright 2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@risingtidesystems.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/configfs.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+
+#include "tcm_loop.h"
+
+#define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev)
+
+/* Local pointer to allocated TCM configfs fabric module */
+static struct target_fabric_configfs *tcm_loop_fabric_configfs;
+
+static struct workqueue_struct *tcm_loop_workqueue;
+static struct kmem_cache *tcm_loop_cmd_cache;
+
+static int tcm_loop_hba_no_cnt;
+
+static int tcm_loop_queue_status(struct se_cmd *se_cmd);
+
+/*
+ * Called from struct target_core_fabric_ops->check_stop_free()
+ */
+static int tcm_loop_check_stop_free(struct se_cmd *se_cmd)
+{
+ /*
+ * Do not release struct se_cmd's containing a valid TMR
+ * pointer. These will be released directly in tcm_loop_device_reset()
+ * with transport_generic_free_cmd().
+ */
+ if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
+ return 0;
+ /*
+ * Release the struct se_cmd, which will make a callback to release
+ * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd()
+ */
+ transport_generic_free_cmd(se_cmd, 0);
+ return 1;
+}
+
+static void tcm_loop_release_cmd(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+
+ kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
+}
+
+static int tcm_loop_proc_info(struct Scsi_Host *host, char *buffer,
+ char **start, off_t offset,
+ int length, int inout)
+{
+ return sprintf(buffer, "tcm_loop_proc_info()\n");
+}
+
+static int tcm_loop_driver_probe(struct device *);
+static int tcm_loop_driver_remove(struct device *);
+
+static int pseudo_lld_bus_match(struct device *dev,
+ struct device_driver *dev_driver)
+{
+ return 1;
+}
+
+static struct bus_type tcm_loop_lld_bus = {
+ .name = "tcm_loop_bus",
+ .match = pseudo_lld_bus_match,
+ .probe = tcm_loop_driver_probe,
+ .remove = tcm_loop_driver_remove,
+};
+
+static struct device_driver tcm_loop_driverfs = {
+ .name = "tcm_loop",
+ .bus = &tcm_loop_lld_bus,
+};
+/*
+ * Used with root_device_register() in tcm_loop_alloc_core_bus() below
+ */
+struct device *tcm_loop_primary;
+
+/*
+ * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and
+ * drivers/scsi/libiscsi.c:iscsi_change_queue_depth()
+ */
+static int tcm_loop_change_queue_depth(
+ struct scsi_device *sdev,
+ int depth,
+ int reason)
+{
+ switch (reason) {
+ case SCSI_QDEPTH_DEFAULT:
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ break;
+ case SCSI_QDEPTH_QFULL:
+ scsi_track_queue_full(sdev, depth);
+ break;
+ case SCSI_QDEPTH_RAMP_UP:
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return sdev->queue_depth;
+}
+
+/*
+ * Locate the SAM Task Attr from struct scsi_cmnd *
+ */
+static int tcm_loop_sam_attr(struct scsi_cmnd *sc)
+{
+ if (sc->device->tagged_supported) {
+ switch (sc->tag) {
+ case HEAD_OF_QUEUE_TAG:
+ return MSG_HEAD_TAG;
+ case ORDERED_QUEUE_TAG:
+ return MSG_ORDERED_TAG;
+ default:
+ break;
+ }
+ }
+
+ return MSG_SIMPLE_TAG;
+}
+
+static void tcm_loop_submission_work(struct work_struct *work)
+{
+ struct tcm_loop_cmd *tl_cmd =
+ container_of(work, struct tcm_loop_cmd, work);
+ struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd;
+ struct scsi_cmnd *sc = tl_cmd->sc;
+ struct tcm_loop_nexus *tl_nexus;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_tpg *tl_tpg;
+ struct scatterlist *sgl_bidi = NULL;
+ u32 sgl_bidi_count = 0;
+ int ret;
+
+ tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
+ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+
+ /*
+ * Ensure that this tl_tpg reference from the incoming sc->device->id
+ * has already been configured via tcm_loop_make_naa_tpg().
+ */
+ if (!tl_tpg->tl_hba) {
+ set_host_byte(sc, DID_NO_CONNECT);
+ goto out_done;
+ }
+
+ tl_nexus = tl_hba->tl_nexus;
+ if (!tl_nexus) {
+ scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus"
+ " does not exist\n");
+ set_host_byte(sc, DID_ERROR);
+ goto out_done;
+ }
+
+ transport_init_se_cmd(se_cmd, tl_tpg->tl_se_tpg.se_tpg_tfo,
+ tl_nexus->se_sess,
+ scsi_bufflen(sc), sc->sc_data_direction,
+ tcm_loop_sam_attr(sc), &tl_cmd->tl_sense_buf[0]);
+
+ if (scsi_bidi_cmnd(sc)) {
+ struct scsi_data_buffer *sdb = scsi_in(sc);
+
+ sgl_bidi = sdb->table.sgl;
+ sgl_bidi_count = sdb->table.nents;
+ se_cmd->se_cmd_flags |= SCF_BIDI;
+
+ }
+
+ if (transport_lookup_cmd_lun(se_cmd, tl_cmd->sc->device->lun) < 0) {
+ kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
+ set_host_byte(sc, DID_NO_CONNECT);
+ goto out_done;
+ }
+
+ /*
+ * Because some userspace code via scsi-generic do not memset their
+ * associated read buffers, go ahead and do that here for type
+ * SCF_SCSI_CONTROL_SG_IO_CDB. Also note that this is currently
+ * guaranteed to be a single SGL for SCF_SCSI_CONTROL_SG_IO_CDB
+ * by target core in transport_generic_allocate_tasks() ->
+ * transport_generic_cmd_sequencer().
+ */
+ if (se_cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB &&
+ se_cmd->data_direction == DMA_FROM_DEVICE) {
+ struct scatterlist *sg = scsi_sglist(sc);
+ unsigned char *buf = kmap(sg_page(sg)) + sg->offset;
+
+ if (buf != NULL) {
+ memset(buf, 0, sg->length);
+ kunmap(sg_page(sg));
+ }
+ }
+
+ ret = transport_generic_allocate_tasks(se_cmd, sc->cmnd);
+ if (ret == -ENOMEM) {
+ transport_send_check_condition_and_sense(se_cmd,
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+ transport_generic_free_cmd(se_cmd, 0);
+ return;
+ } else if (ret < 0) {
+ if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT)
+ tcm_loop_queue_status(se_cmd);
+ else
+ transport_send_check_condition_and_sense(se_cmd,
+ se_cmd->scsi_sense_reason, 0);
+ transport_generic_free_cmd(se_cmd, 0);
+ return;
+ }
+
+ ret = transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc),
+ scsi_sg_count(sc), sgl_bidi, sgl_bidi_count);
+ if (ret) {
+ transport_send_check_condition_and_sense(se_cmd,
+ se_cmd->scsi_sense_reason, 0);
+ transport_generic_free_cmd(se_cmd, 0);
+ return;
+ }
+ transport_handle_cdb_direct(se_cmd);
+ return;
+
+out_done:
+ sc->scsi_done(sc);
+ return;
+}
+
+/*
+ * ->queuecommand can be and usually is called from interrupt context, so
+ * defer the actual submission to a workqueue.
+ */
+static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc)
+{
+ struct tcm_loop_cmd *tl_cmd;
+
+ pr_debug("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x"
+ " scsi_buf_len: %u\n", sc->device->host->host_no,
+ sc->device->id, sc->device->channel, sc->device->lun,
+ sc->cmnd[0], scsi_bufflen(sc));
+
+ tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC);
+ if (!tl_cmd) {
+ pr_err("Unable to allocate struct tcm_loop_cmd\n");
+ set_host_byte(sc, DID_ERROR);
+ sc->scsi_done(sc);
+ return 0;
+ }
+
+ tl_cmd->sc = sc;
+ INIT_WORK(&tl_cmd->work, tcm_loop_submission_work);
+ queue_work(tcm_loop_workqueue, &tl_cmd->work);
+ return 0;
+}
+
+/*
+ * Called from SCSI EH process context to issue a LUN_RESET TMR
+ * to struct scsi_device
+ */
+static int tcm_loop_device_reset(struct scsi_cmnd *sc)
+{
+ struct se_cmd *se_cmd = NULL;
+ struct se_portal_group *se_tpg;
+ struct se_session *se_sess;
+ struct tcm_loop_cmd *tl_cmd = NULL;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
+ struct tcm_loop_tmr *tl_tmr = NULL;
+ struct tcm_loop_tpg *tl_tpg;
+ int ret = FAILED, rc;
+ /*
+ * Locate the tcm_loop_hba_t pointer
+ */
+ tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
+ /*
+ * Locate the tl_nexus and se_sess pointers
+ */
+ tl_nexus = tl_hba->tl_nexus;
+ if (!tl_nexus) {
+ pr_err("Unable to perform device reset without"
+ " active I_T Nexus\n");
+ return FAILED;
+ }
+ se_sess = tl_nexus->se_sess;
+ /*
+ * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id
+ */
+ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+ se_tpg = &tl_tpg->tl_se_tpg;
+
+ tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL);
+ if (!tl_cmd) {
+ pr_err("Unable to allocate memory for tl_cmd\n");
+ return FAILED;
+ }
+
+ tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL);
+ if (!tl_tmr) {
+ pr_err("Unable to allocate memory for tl_tmr\n");
+ goto release;
+ }
+ init_waitqueue_head(&tl_tmr->tl_tmr_wait);
+
+ se_cmd = &tl_cmd->tl_se_cmd;
+ /*
+ * Initialize struct se_cmd descriptor from target_core_mod infrastructure
+ */
+ transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0,
+ DMA_NONE, MSG_SIMPLE_TAG,
+ &tl_cmd->tl_sense_buf[0]);
+
+ rc = core_tmr_alloc_req(se_cmd, tl_tmr, TMR_LUN_RESET, GFP_KERNEL);
+ if (rc < 0)
+ goto release;
+ /*
+ * Locate the underlying TCM struct se_lun from sc->device->lun
+ */
+ if (transport_lookup_tmr_lun(se_cmd, sc->device->lun) < 0)
+ goto release;
+ /*
+ * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp()
+ * to wake us up.
+ */
+ transport_generic_handle_tmr(se_cmd);
+ wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete));
+ /*
+ * The TMR LUN_RESET has completed, check the response status and
+ * then release allocations.
+ */
+ ret = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ?
+ SUCCESS : FAILED;
+release:
+ if (se_cmd)
+ transport_generic_free_cmd(se_cmd, 1);
+ else
+ kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
+ kfree(tl_tmr);
+ return ret;
+}
+
+static int tcm_loop_slave_alloc(struct scsi_device *sd)
+{
+ set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags);
+ return 0;
+}
+
+static int tcm_loop_slave_configure(struct scsi_device *sd)
+{
+ return 0;
+}
+
+static struct scsi_host_template tcm_loop_driver_template = {
+ .proc_info = tcm_loop_proc_info,
+ .proc_name = "tcm_loopback",
+ .name = "TCM_Loopback",
+ .queuecommand = tcm_loop_queuecommand,
+ .change_queue_depth = tcm_loop_change_queue_depth,
+ .eh_device_reset_handler = tcm_loop_device_reset,
+ .can_queue = 1024,
+ .this_id = -1,
+ .sg_tablesize = 256,
+ .cmd_per_lun = 1024,
+ .max_sectors = 0xFFFF,
+ .use_clustering = DISABLE_CLUSTERING,
+ .slave_alloc = tcm_loop_slave_alloc,
+ .slave_configure = tcm_loop_slave_configure,
+ .module = THIS_MODULE,
+};
+
+static int tcm_loop_driver_probe(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+ int error;
+
+ tl_hba = to_tcm_loop_hba(dev);
+
+ sh = scsi_host_alloc(&tcm_loop_driver_template,
+ sizeof(struct tcm_loop_hba));
+ if (!sh) {
+ pr_err("Unable to allocate struct scsi_host\n");
+ return -ENODEV;
+ }
+ tl_hba->sh = sh;
+
+ /*
+ * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata
+ */
+ *((struct tcm_loop_hba **)sh->hostdata) = tl_hba;
+ /*
+ * Setup single ID, Channel and LUN for now..
+ */
+ sh->max_id = 2;
+ sh->max_lun = 0;
+ sh->max_channel = 0;
+ sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN;
+
+ error = scsi_add_host(sh, &tl_hba->dev);
+ if (error) {
+ pr_err("%s: scsi_add_host failed\n", __func__);
+ scsi_host_put(sh);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int tcm_loop_driver_remove(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+
+ tl_hba = to_tcm_loop_hba(dev);
+ sh = tl_hba->sh;
+
+ scsi_remove_host(sh);
+ scsi_host_put(sh);
+ return 0;
+}
+
+static void tcm_loop_release_adapter(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev);
+
+ kfree(tl_hba);
+}
+
+/*
+ * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c
+ */
+static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id)
+{
+ int ret;
+
+ tl_hba->dev.bus = &tcm_loop_lld_bus;
+ tl_hba->dev.parent = tcm_loop_primary;
+ tl_hba->dev.release = &tcm_loop_release_adapter;
+ dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id);
+
+ ret = device_register(&tl_hba->dev);
+ if (ret) {
+ pr_err("device_register() failed for"
+ " tl_hba->dev: %d\n", ret);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/*
+ * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated
+ * tcm_loop SCSI bus.
+ */
+static int tcm_loop_alloc_core_bus(void)
+{
+ int ret;
+
+ tcm_loop_primary = root_device_register("tcm_loop_0");
+ if (IS_ERR(tcm_loop_primary)) {
+ pr_err("Unable to allocate tcm_loop_primary\n");
+ return PTR_ERR(tcm_loop_primary);
+ }
+
+ ret = bus_register(&tcm_loop_lld_bus);
+ if (ret) {
+ pr_err("bus_register() failed for tcm_loop_lld_bus\n");
+ goto dev_unreg;
+ }
+
+ ret = driver_register(&tcm_loop_driverfs);
+ if (ret) {
+ pr_err("driver_register() failed for"
+ "tcm_loop_driverfs\n");
+ goto bus_unreg;
+ }
+
+ pr_debug("Initialized TCM Loop Core Bus\n");
+ return ret;
+
+bus_unreg:
+ bus_unregister(&tcm_loop_lld_bus);
+dev_unreg:
+ root_device_unregister(tcm_loop_primary);
+ return ret;
+}
+
+static void tcm_loop_release_core_bus(void)
+{
+ driver_unregister(&tcm_loop_driverfs);
+ bus_unregister(&tcm_loop_lld_bus);
+ root_device_unregister(tcm_loop_primary);
+
+ pr_debug("Releasing TCM Loop Core BUS\n");
+}
+
+static char *tcm_loop_get_fabric_name(void)
+{
+ return "loopback";
+}
+
+static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ /*
+ * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba()
+ * time based on the protocol dependent prefix of the passed configfs group.
+ *
+ * Based upon tl_proto_id, TCM_Loop emulates the requested fabric
+ * ProtocolID using target_core_fabric_lib.c symbols.
+ */
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_fabric_proto_ident(se_tpg);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_fabric_proto_ident(se_tpg);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_fabric_proto_ident(se_tpg);
+ default:
+ pr_err("Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_fabric_proto_ident(se_tpg);
+}
+
+static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ /*
+ * Return the passed NAA identifier for the SAS Target Port
+ */
+ return &tl_tpg->tl_hba->tl_wwn_address[0];
+}
+
+static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ /*
+ * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83
+ * to represent the SCSI Target Port.
+ */
+ return tl_tpg->tl_tpgt;
+}
+
+static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+static u32 tcm_loop_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ default:
+ pr_err("Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+}
+
+static u32 tcm_loop_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ default:
+ pr_err("Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+}
+
+/*
+ * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above
+ * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations.
+ */
+static char *tcm_loop_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ case SCSI_PROTOCOL_FCP:
+ return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ default:
+ pr_err("Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+}
+
+/*
+ * Returning (1) here allows for target_core_mod struct se_node_acl to be generated
+ * based upon the incoming fabric dependent SCSI Initiator Port
+ */
+static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+/*
+ * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for
+ * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest
+ */
+static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+/*
+ * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will
+ * never be called for TCM_Loop by target_core_fabric_configfs.c code.
+ * It has been added here as a nop for target_fabric_tf_ops_check()
+ */
+static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl(
+ struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_nacl *tl_nacl;
+
+ tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL);
+ if (!tl_nacl) {
+ pr_err("Unable to allocate struct tcm_loop_nacl\n");
+ return NULL;
+ }
+
+ return &tl_nacl->se_node_acl;
+}
+
+static void tcm_loop_tpg_release_fabric_acl(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl)
+{
+ struct tcm_loop_nacl *tl_nacl = container_of(se_nacl,
+ struct tcm_loop_nacl, se_node_acl);
+
+ kfree(tl_nacl);
+}
+
+static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+static u32 tcm_loop_sess_get_index(struct se_session *se_sess)
+{
+ return 1;
+}
+
+static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl)
+{
+ return;
+}
+
+static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd)
+{
+ return 1;
+}
+
+static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+
+ return tl_cmd->sc_cmd_state;
+}
+
+static int tcm_loop_shutdown_session(struct se_session *se_sess)
+{
+ return 0;
+}
+
+static void tcm_loop_close_session(struct se_session *se_sess)
+{
+ return;
+};
+
+static int tcm_loop_write_pending(struct se_cmd *se_cmd)
+{
+ /*
+ * Since Linux/SCSI has already sent down a struct scsi_cmnd
+ * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array
+ * memory, and memory has already been mapped to struct se_cmd->t_mem_list
+ * format with transport_generic_map_mem_to_cmd().
+ *
+ * We now tell TCM to add this WRITE CDB directly into the TCM storage
+ * object execution queue.
+ */
+ transport_generic_process_write(se_cmd);
+ return 0;
+}
+
+static int tcm_loop_write_pending_status(struct se_cmd *se_cmd)
+{
+ return 0;
+}
+
+static int tcm_loop_queue_data_in(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+ struct scsi_cmnd *sc = tl_cmd->sc;
+
+ pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p"
+ " cdb: 0x%02x\n", sc, sc->cmnd[0]);
+
+ sc->result = SAM_STAT_GOOD;
+ set_host_byte(sc, DID_OK);
+ if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) ||
+ (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT))
+ scsi_set_resid(sc, se_cmd->residual_count);
+ sc->scsi_done(sc);
+ return 0;
+}
+
+static int tcm_loop_queue_status(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+ struct scsi_cmnd *sc = tl_cmd->sc;
+
+ pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p"
+ " cdb: 0x%02x\n", sc, sc->cmnd[0]);
+
+ if (se_cmd->sense_buffer &&
+ ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
+ (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
+
+ memcpy(sc->sense_buffer, se_cmd->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE);
+ sc->result = SAM_STAT_CHECK_CONDITION;
+ set_driver_byte(sc, DRIVER_SENSE);
+ } else
+ sc->result = se_cmd->scsi_status;
+
+ set_host_byte(sc, DID_OK);
+ if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) ||
+ (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT))
+ scsi_set_resid(sc, se_cmd->residual_count);
+ sc->scsi_done(sc);
+ return 0;
+}
+
+static int tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd)
+{
+ struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
+ struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr;
+ /*
+ * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead
+ * and wake up the wait_queue_head_t in tcm_loop_device_reset()
+ */
+ atomic_set(&tl_tmr->tmr_complete, 1);
+ wake_up(&tl_tmr->tl_tmr_wait);
+ return 0;
+}
+
+static u16 tcm_loop_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
+{
+ return 0;
+}
+
+static u16 tcm_loop_get_fabric_sense_len(void)
+{
+ return 0;
+}
+
+static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba)
+{
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return "SAS";
+ case SCSI_PROTOCOL_FCP:
+ return "FCP";
+ case SCSI_PROTOCOL_ISCSI:
+ return "iSCSI";
+ default:
+ break;
+ }
+
+ return "Unknown";
+}
+
+/* Start items for tcm_loop_port_cit */
+
+static int tcm_loop_port_link(
+ struct se_portal_group *se_tpg,
+ struct se_lun *lun)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ atomic_inc(&tl_tpg->tl_tpg_port_count);
+ smp_mb__after_atomic_inc();
+ /*
+ * Add Linux/SCSI struct scsi_device by HCTL
+ */
+ scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun);
+
+ pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n");
+ return 0;
+}
+
+static void tcm_loop_port_unlink(
+ struct se_portal_group *se_tpg,
+ struct se_lun *se_lun)
+{
+ struct scsi_device *sd;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_tpg *tl_tpg;
+
+ tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg);
+ tl_hba = tl_tpg->tl_hba;
+
+ sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt,
+ se_lun->unpacked_lun);
+ if (!sd) {
+ pr_err("Unable to locate struct scsi_device for %d:%d:"
+ "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun);
+ return;
+ }
+ /*
+ * Remove Linux/SCSI struct scsi_device by HCTL
+ */
+ scsi_remove_device(sd);
+ scsi_device_put(sd);
+
+ atomic_dec(&tl_tpg->tl_tpg_port_count);
+ smp_mb__after_atomic_dec();
+
+ pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n");
+}
+
+/* End items for tcm_loop_port_cit */
+
+/* Start items for tcm_loop_nexus_cit */
+
+static int tcm_loop_make_nexus(
+ struct tcm_loop_tpg *tl_tpg,
+ const char *name)
+{
+ struct se_portal_group *se_tpg;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
+ int ret = -ENOMEM;
+
+ if (tl_tpg->tl_hba->tl_nexus) {
+ pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n");
+ return -EEXIST;
+ }
+ se_tpg = &tl_tpg->tl_se_tpg;
+
+ tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL);
+ if (!tl_nexus) {
+ pr_err("Unable to allocate struct tcm_loop_nexus\n");
+ return -ENOMEM;
+ }
+ /*
+ * Initialize the struct se_session pointer
+ */
+ tl_nexus->se_sess = transport_init_session();
+ if (IS_ERR(tl_nexus->se_sess)) {
+ ret = PTR_ERR(tl_nexus->se_sess);
+ goto out;
+ }
+ /*
+ * Since we are running in 'demo mode' this call with generate a
+ * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI
+ * Initiator port name of the passed configfs group 'name'.
+ */
+ tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
+ se_tpg, (unsigned char *)name);
+ if (!tl_nexus->se_sess->se_node_acl) {
+ transport_free_session(tl_nexus->se_sess);
+ goto out;
+ }
+ /*
+ * Now, register the SAS I_T Nexus as active with the call to
+ * transport_register_session()
+ */
+ __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
+ tl_nexus->se_sess, tl_nexus);
+ tl_tpg->tl_hba->tl_nexus = tl_nexus;
+ pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ name);
+ return 0;
+
+out:
+ kfree(tl_nexus);
+ return ret;
+}
+
+static int tcm_loop_drop_nexus(
+ struct tcm_loop_tpg *tpg)
+{
+ struct se_session *se_sess;
+ struct tcm_loop_nexus *tl_nexus;
+ struct tcm_loop_hba *tl_hba = tpg->tl_hba;
+
+ tl_nexus = tpg->tl_hba->tl_nexus;
+ if (!tl_nexus)
+ return -ENODEV;
+
+ se_sess = tl_nexus->se_sess;
+ if (!se_sess)
+ return -ENODEV;
+
+ if (atomic_read(&tpg->tl_tpg_port_count)) {
+ pr_err("Unable to remove TCM_Loop I_T Nexus with"
+ " active TPG port count: %d\n",
+ atomic_read(&tpg->tl_tpg_port_count));
+ return -EPERM;
+ }
+
+ pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated"
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ tl_nexus->se_sess->se_node_acl->initiatorname);
+ /*
+ * Release the SCSI I_T Nexus to the emulated SAS Target Port
+ */
+ transport_deregister_session(tl_nexus->se_sess);
+ tpg->tl_hba->tl_nexus = NULL;
+ kfree(tl_nexus);
+ return 0;
+}
+
+/* End items for tcm_loop_nexus_cit */
+
+static ssize_t tcm_loop_tpg_show_nexus(
+ struct se_portal_group *se_tpg,
+ char *page)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_nexus *tl_nexus;
+ ssize_t ret;
+
+ tl_nexus = tl_tpg->tl_hba->tl_nexus;
+ if (!tl_nexus)
+ return -ENODEV;
+
+ ret = snprintf(page, PAGE_SIZE, "%s\n",
+ tl_nexus->se_sess->se_node_acl->initiatorname);
+
+ return ret;
+}
+
+static ssize_t tcm_loop_tpg_store_nexus(
+ struct se_portal_group *se_tpg,
+ const char *page,
+ size_t count)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr;
+ int ret;
+ /*
+ * Shutdown the active I_T nexus if 'NULL' is passed..
+ */
+ if (!strncmp(page, "NULL", 4)) {
+ ret = tcm_loop_drop_nexus(tl_tpg);
+ return (!ret) ? count : ret;
+ }
+ /*
+ * Otherwise make sure the passed virtual Initiator port WWN matches
+ * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call
+ * tcm_loop_make_nexus()
+ */
+ if (strlen(page) >= TL_WWN_ADDR_LEN) {
+ pr_err("Emulated NAA Sas Address: %s, exceeds"
+ " max: %d\n", page, TL_WWN_ADDR_LEN);
+ return -EINVAL;
+ }
+ snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page);
+
+ ptr = strstr(i_port, "naa.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) {
+ pr_err("Passed SAS Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[0];
+ goto check_newline;
+ }
+ ptr = strstr(i_port, "fc.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) {
+ pr_err("Passed FCP Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[3]; /* Skip over "fc." */
+ goto check_newline;
+ }
+ ptr = strstr(i_port, "iqn.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) {
+ pr_err("Passed iSCSI Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[0];
+ goto check_newline;
+ }
+ pr_err("Unable to locate prefix for emulated Initiator Port:"
+ " %s\n", i_port);
+ return -EINVAL;
+ /*
+ * Clear any trailing newline for the NAA WWN
+ */
+check_newline:
+ if (i_port[strlen(i_port)-1] == '\n')
+ i_port[strlen(i_port)-1] = '\0';
+
+ ret = tcm_loop_make_nexus(tl_tpg, port_ptr);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *tcm_loop_tpg_attrs[] = {
+ &tcm_loop_tpg_nexus.attr,
+ NULL,
+};
+
+/* Start items for tcm_loop_naa_cit */
+
+struct se_portal_group *tcm_loop_make_naa_tpg(
+ struct se_wwn *wwn,
+ struct config_group *group,
+ const char *name)
+{
+ struct tcm_loop_hba *tl_hba = container_of(wwn,
+ struct tcm_loop_hba, tl_hba_wwn);
+ struct tcm_loop_tpg *tl_tpg;
+ char *tpgt_str, *end_ptr;
+ int ret;
+ unsigned short int tpgt;
+
+ tpgt_str = strstr(name, "tpgt_");
+ if (!tpgt_str) {
+ pr_err("Unable to locate \"tpgt_#\" directory"
+ " group\n");
+ return ERR_PTR(-EINVAL);
+ }
+ tpgt_str += 5; /* Skip ahead of "tpgt_" */
+ tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0);
+
+ if (tpgt >= TL_TPGS_PER_HBA) {
+ pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:"
+ " %u\n", tpgt, TL_TPGS_PER_HBA);
+ return ERR_PTR(-EINVAL);
+ }
+ tl_tpg = &tl_hba->tl_hba_tpgs[tpgt];
+ tl_tpg->tl_hba = tl_hba;
+ tl_tpg->tl_tpgt = tpgt;
+ /*
+ * Register the tl_tpg as a emulated SAS TCM Target Endpoint
+ */
+ ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops,
+ wwn, &tl_tpg->tl_se_tpg, tl_tpg,
+ TRANSPORT_TPG_TYPE_NORMAL);
+ if (ret < 0)
+ return ERR_PTR(-ENOMEM);
+
+ pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s"
+ " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba),
+ config_item_name(&wwn->wwn_group.cg_item), tpgt);
+
+ return &tl_tpg->tl_se_tpg;
+}
+
+void tcm_loop_drop_naa_tpg(
+ struct se_portal_group *se_tpg)
+{
+ struct se_wwn *wwn = se_tpg->se_tpg_wwn;
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba;
+ unsigned short tpgt;
+
+ tl_hba = tl_tpg->tl_hba;
+ tpgt = tl_tpg->tl_tpgt;
+ /*
+ * Release the I_T Nexus for the Virtual SAS link if present
+ */
+ tcm_loop_drop_nexus(tl_tpg);
+ /*
+ * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint
+ */
+ core_tpg_deregister(se_tpg);
+
+ tl_tpg->tl_hba = NULL;
+ tl_tpg->tl_tpgt = 0;
+
+ pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s"
+ " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba),
+ config_item_name(&wwn->wwn_group.cg_item), tpgt);
+}
+
+/* End items for tcm_loop_naa_cit */
+
+/* Start items for tcm_loop_cit */
+
+struct se_wwn *tcm_loop_make_scsi_hba(
+ struct target_fabric_configfs *tf,
+ struct config_group *group,
+ const char *name)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+ char *ptr;
+ int ret, off = 0;
+
+ tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL);
+ if (!tl_hba) {
+ pr_err("Unable to allocate struct tcm_loop_hba\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ /*
+ * Determine the emulated Protocol Identifier and Target Port Name
+ * based on the incoming configfs directory name.
+ */
+ ptr = strstr(name, "naa.");
+ if (ptr) {
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS;
+ goto check_len;
+ }
+ ptr = strstr(name, "fc.");
+ if (ptr) {
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP;
+ off = 3; /* Skip over "fc." */
+ goto check_len;
+ }
+ ptr = strstr(name, "iqn.");
+ if (!ptr) {
+ pr_err("Unable to locate prefix for emulated Target "
+ "Port: %s\n", name);
+ ret = -EINVAL;
+ goto out;
+ }
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI;
+
+check_len:
+ if (strlen(name) >= TL_WWN_ADDR_LEN) {
+ pr_err("Emulated NAA %s Address: %s, exceeds"
+ " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba),
+ TL_WWN_ADDR_LEN);
+ ret = -EINVAL;
+ goto out;
+ }
+ snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]);
+
+ /*
+ * Call device_register(tl_hba->dev) to register the emulated
+ * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after
+ * device_register() callbacks in tcm_loop_driver_probe()
+ */
+ ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt);
+ if (ret)
+ goto out;
+
+ sh = tl_hba->sh;
+ tcm_loop_hba_no_cnt++;
+ pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target"
+ " %s Address: %s at Linux/SCSI Host ID: %d\n",
+ tcm_loop_dump_proto_id(tl_hba), name, sh->host_no);
+
+ return &tl_hba->tl_hba_wwn;
+out:
+ kfree(tl_hba);
+ return ERR_PTR(ret);
+}
+
+void tcm_loop_drop_scsi_hba(
+ struct se_wwn *wwn)
+{
+ struct tcm_loop_hba *tl_hba = container_of(wwn,
+ struct tcm_loop_hba, tl_hba_wwn);
+
+ pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target"
+ " SAS Address: %s at Linux/SCSI Host ID: %d\n",
+ tl_hba->tl_wwn_address, tl_hba->sh->host_no);
+ /*
+ * Call device_unregister() on the original tl_hba->dev.
+ * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will
+ * release *tl_hba;
+ */
+ device_unregister(&tl_hba->dev);
+}
+
+/* Start items for tcm_loop_cit */
+static ssize_t tcm_loop_wwn_show_attr_version(
+ struct target_fabric_configfs *tf,
+ char *page)
+{
+ return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION);
+}
+
+TF_WWN_ATTR_RO(tcm_loop, version);
+
+static struct configfs_attribute *tcm_loop_wwn_attrs[] = {
+ &tcm_loop_wwn_version.attr,
+ NULL,
+};
+
+/* End items for tcm_loop_cit */
+
+static int tcm_loop_register_configfs(void)
+{
+ struct target_fabric_configfs *fabric;
+ int ret;
+ /*
+ * Set the TCM Loop HBA counter to zero
+ */
+ tcm_loop_hba_no_cnt = 0;
+ /*
+ * Register the top level struct config_item_type with TCM core
+ */
+ fabric = target_fabric_configfs_init(THIS_MODULE, "loopback");
+ if (IS_ERR(fabric)) {
+ pr_err("tcm_loop_register_configfs() failed!\n");
+ return PTR_ERR(fabric);
+ }
+ /*
+ * Setup the fabric API of function pointers used by target_core_mod
+ */
+ fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name;
+ fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident;
+ fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn;
+ fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag;
+ fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth;
+ fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id;
+ fabric->tf_ops.tpg_get_pr_transport_id_len =
+ &tcm_loop_get_pr_transport_id_len;
+ fabric->tf_ops.tpg_parse_pr_out_transport_id =
+ &tcm_loop_parse_pr_out_transport_id;
+ fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode;
+ fabric->tf_ops.tpg_check_demo_mode_cache =
+ &tcm_loop_check_demo_mode_cache;
+ fabric->tf_ops.tpg_check_demo_mode_write_protect =
+ &tcm_loop_check_demo_mode_write_protect;
+ fabric->tf_ops.tpg_check_prod_mode_write_protect =
+ &tcm_loop_check_prod_mode_write_protect;
+ /*
+ * The TCM loopback fabric module runs in demo-mode to a local
+ * virtual SCSI device, so fabric dependent initator ACLs are
+ * not required.
+ */
+ fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl;
+ fabric->tf_ops.tpg_release_fabric_acl =
+ &tcm_loop_tpg_release_fabric_acl;
+ fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index;
+ /*
+ * Used for setting up remaining TCM resources in process context
+ */
+ fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free;
+ fabric->tf_ops.release_cmd = &tcm_loop_release_cmd;
+ fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session;
+ fabric->tf_ops.close_session = &tcm_loop_close_session;
+ fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index;
+ fabric->tf_ops.sess_get_initiator_sid = NULL;
+ fabric->tf_ops.write_pending = &tcm_loop_write_pending;
+ fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status;
+ /*
+ * Not used for TCM loopback
+ */
+ fabric->tf_ops.set_default_node_attributes =
+ &tcm_loop_set_default_node_attributes;
+ fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag;
+ fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state;
+ fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in;
+ fabric->tf_ops.queue_status = &tcm_loop_queue_status;
+ fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp;
+ fabric->tf_ops.set_fabric_sense_len = &tcm_loop_set_fabric_sense_len;
+ fabric->tf_ops.get_fabric_sense_len = &tcm_loop_get_fabric_sense_len;
+
+ /*
+ * Setup function pointers for generic logic in target_core_fabric_configfs.c
+ */
+ fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba;
+ fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba;
+ fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg;
+ fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg;
+ /*
+ * fabric_post_link() and fabric_pre_unlink() are used for
+ * registration and release of TCM Loop Virtual SCSI LUNs.
+ */
+ fabric->tf_ops.fabric_post_link = &tcm_loop_port_link;
+ fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink;
+ fabric->tf_ops.fabric_make_np = NULL;
+ fabric->tf_ops.fabric_drop_np = NULL;
+ /*
+ * Setup default attribute lists for various fabric->tf_cit_tmpl
+ */
+ TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
+ /*
+ * Once fabric->tf_ops has been setup, now register the fabric for
+ * use within TCM
+ */
+ ret = target_fabric_configfs_register(fabric);
+ if (ret < 0) {
+ pr_err("target_fabric_configfs_register() for"
+ " TCM_Loop failed!\n");
+ target_fabric_configfs_free(fabric);
+ return -1;
+ }
+ /*
+ * Setup our local pointer to *fabric.
+ */
+ tcm_loop_fabric_configfs = fabric;
+ pr_debug("TCM_LOOP[0] - Set fabric ->"
+ " tcm_loop_fabric_configfs\n");
+ return 0;
+}
+
+static void tcm_loop_deregister_configfs(void)
+{
+ if (!tcm_loop_fabric_configfs)
+ return;
+
+ target_fabric_configfs_deregister(tcm_loop_fabric_configfs);
+ tcm_loop_fabric_configfs = NULL;
+ pr_debug("TCM_LOOP[0] - Cleared"
+ " tcm_loop_fabric_configfs\n");
+}
+
+static int __init tcm_loop_fabric_init(void)
+{
+ int ret = -ENOMEM;
+
+ tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0);
+ if (!tcm_loop_workqueue)
+ goto out;
+
+ tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache",
+ sizeof(struct tcm_loop_cmd),
+ __alignof__(struct tcm_loop_cmd),
+ 0, NULL);
+ if (!tcm_loop_cmd_cache) {
+ pr_debug("kmem_cache_create() for"
+ " tcm_loop_cmd_cache failed\n");
+ goto out_destroy_workqueue;
+ }
+
+ ret = tcm_loop_alloc_core_bus();
+ if (ret)
+ goto out_destroy_cache;
+
+ ret = tcm_loop_register_configfs();
+ if (ret)
+ goto out_release_core_bus;
+
+ return 0;
+
+out_release_core_bus:
+ tcm_loop_release_core_bus();
+out_destroy_cache:
+ kmem_cache_destroy(tcm_loop_cmd_cache);
+out_destroy_workqueue:
+ destroy_workqueue(tcm_loop_workqueue);
+out:
+ return ret;
+}
+
+static void __exit tcm_loop_fabric_exit(void)
+{
+ tcm_loop_deregister_configfs();
+ tcm_loop_release_core_bus();
+ kmem_cache_destroy(tcm_loop_cmd_cache);
+ destroy_workqueue(tcm_loop_workqueue);
+}
+
+MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module");
+MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>");
+MODULE_LICENSE("GPL");
+module_init(tcm_loop_fabric_init);
+module_exit(tcm_loop_fabric_exit);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.h b/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.h
new file mode 100644
index 0000000..7b54893
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/loopback/tcm_loop.h
@@ -0,0 +1,62 @@
+#define TCM_LOOP_VERSION "v2.1-rc2"
+#define TL_WWN_ADDR_LEN 256
+#define TL_TPGS_PER_HBA 32
+
+/*
+ * Used in tcm_loop_driver_probe() for struct Scsi_Host->max_cmd_len
+ */
+#define TL_SCSI_MAX_CMD_LEN 32
+
+struct tcm_loop_cmd {
+ /* State of Linux/SCSI CDB+Data descriptor */
+ u32 sc_cmd_state;
+ /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */
+ struct scsi_cmnd *sc;
+ /* The TCM I/O descriptor that is accessed via container_of() */
+ struct se_cmd tl_se_cmd;
+ struct work_struct work;
+ /* Sense buffer that will be mapped into outgoing status */
+ unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
+};
+
+struct tcm_loop_tmr {
+ atomic_t tmr_complete;
+ wait_queue_head_t tl_tmr_wait;
+};
+
+struct tcm_loop_nexus {
+ int it_nexus_active;
+ /*
+ * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
+ */
+ struct scsi_host *sh;
+ /*
+ * Pointer to TCM session for I_T Nexus
+ */
+ struct se_session *se_sess;
+};
+
+struct tcm_loop_nacl {
+ struct se_node_acl se_node_acl;
+};
+
+struct tcm_loop_tpg {
+ unsigned short tl_tpgt;
+ atomic_t tl_tpg_port_count;
+ struct se_portal_group tl_se_tpg;
+ struct tcm_loop_hba *tl_hba;
+};
+
+struct tcm_loop_hba {
+ u8 tl_proto_id;
+ unsigned char tl_wwn_address[TL_WWN_ADDR_LEN];
+ struct se_hba_s *se_hba;
+ struct se_lun *tl_hba_lun;
+ struct se_port *tl_hba_lun_sep;
+ struct se_device_s *se_dev_hba_ptr;
+ struct tcm_loop_nexus *tl_nexus;
+ struct device dev;
+ struct Scsi_Host *sh;
+ struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
+ struct se_wwn tl_hba_wwn;
+};
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.c
new file mode 100644
index 0000000..b10f585
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.c
@@ -0,0 +1,2052 @@
+/*******************************************************************************
+ * Filename: target_core_alua.c
+ *
+ * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA)
+ *
+ * Copyright (c) 2009-2010 Rising Tide Systems
+ * Copyright (c) 2009-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/configfs.h>
+#include <linux/export.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <asm/unaligned.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_ua.h"
+
+static int core_alua_check_transition(int state, int *primary);
+static int core_alua_set_tg_pt_secondary_state(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port, int explict, int offline);
+
+static u16 alua_lu_gps_counter;
+static u32 alua_lu_gps_count;
+
+static DEFINE_SPINLOCK(lu_gps_lock);
+static LIST_HEAD(lu_gps_list);
+
+struct t10_alua_lu_gp *default_lu_gp;
+
+/*
+ * REPORT_TARGET_PORT_GROUPS
+ *
+ * See spc4r17 section 6.27
+ */
+int target_emulate_report_target_port_groups(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+ struct se_port *port;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char *buf;
+ u32 rd_len = 0, off = 4; /* Skip over RESERVED area to first
+ Target port group descriptor */
+ /*
+ * Need at least 4 bytes of response data or else we can't
+ * even fit the return data length.
+ */
+ if (cmd->data_length < 4) {
+ pr_warn("REPORT TARGET PORT GROUPS allocation length %u"
+ " too small\n", cmd->data_length);
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp, &su_dev->t10_alua.tg_pt_gps_list,
+ tg_pt_gp_list) {
+ /*
+ * Check if the Target port group and Target port descriptor list
+ * based on tg_pt_gp_members count will fit into the response payload.
+ * Otherwise, bump rd_len to let the initiator know we have exceeded
+ * the allocation length and the response is truncated.
+ */
+ if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) >
+ cmd->data_length) {
+ rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4);
+ continue;
+ }
+ /*
+ * PREF: Preferred target port bit, determine if this
+ * bit should be set for port group.
+ */
+ if (tg_pt_gp->tg_pt_gp_pref)
+ buf[off] = 0x80;
+ /*
+ * Set the ASYMMETRIC ACCESS State
+ */
+ buf[off++] |= (atomic_read(
+ &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff);
+ /*
+ * Set supported ASYMMETRIC ACCESS State bits
+ */
+ buf[off] = 0x80; /* T_SUP */
+ buf[off] |= 0x40; /* O_SUP */
+ buf[off] |= 0x8; /* U_SUP */
+ buf[off] |= 0x4; /* S_SUP */
+ buf[off] |= 0x2; /* AN_SUP */
+ buf[off++] |= 0x1; /* AO_SUP */
+ /*
+ * TARGET PORT GROUP
+ */
+ buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff);
+ buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff);
+
+ off++; /* Skip over Reserved */
+ /*
+ * STATUS CODE
+ */
+ buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff);
+ /*
+ * Vendor Specific field
+ */
+ buf[off++] = 0x00;
+ /*
+ * TARGET PORT COUNT
+ */
+ buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff);
+ rd_len += 8;
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = tg_pt_gp_mem->tg_pt;
+ /*
+ * Start Target Port descriptor format
+ *
+ * See spc4r17 section 6.2.7 Table 247
+ */
+ off += 2; /* Skip over Obsolete */
+ /*
+ * Set RELATIVE TARGET PORT IDENTIFIER
+ */
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ rd_len += 4;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ }
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ /*
+ * Set the RETURN DATA LENGTH set in the header of the DataIN Payload
+ */
+ buf[0] = ((rd_len >> 24) & 0xff);
+ buf[1] = ((rd_len >> 16) & 0xff);
+ buf[2] = ((rd_len >> 8) & 0xff);
+ buf[3] = (rd_len & 0xff);
+
+ transport_kunmap_data_sg(cmd);
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+/*
+ * SET_TARGET_PORT_GROUPS for explict ALUA operation.
+ *
+ * See spc4r17 section 6.35
+ */
+int target_emulate_set_target_port_groups(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct se_port *port, *l_port = cmd->se_lun->lun_sep;
+ struct se_node_acl *nacl = cmd->se_sess->se_node_acl;
+ struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
+ unsigned char *buf;
+ unsigned char *ptr;
+ u32 len = 4; /* Skip over RESERVED area in header */
+ int alua_access_state, primary = 0, rc;
+ u16 tg_pt_id, rtpi;
+
+ if (!l_port) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ buf = transport_kmap_data_sg(cmd);
+
+ /*
+ * Determine if explict ALUA via SET_TARGET_PORT_GROUPS is allowed
+ * for the local tg_pt_gp.
+ */
+ l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem;
+ if (!l_tg_pt_gp_mem) {
+ pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n");
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ rc = -EINVAL;
+ goto out;
+ }
+ spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp;
+ if (!l_tg_pt_gp) {
+ spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n");
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ rc = -EINVAL;
+ goto out;
+ }
+ rc = (l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA);
+ spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ if (!rc) {
+ pr_debug("Unable to process SET_TARGET_PORT_GROUPS"
+ " while TPGS_EXPLICT_ALUA is disabled\n");
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ rc = -EINVAL;
+ goto out;
+ }
+
+ ptr = &buf[4]; /* Skip over RESERVED area in header */
+
+ while (len < cmd->data_length) {
+ alua_access_state = (ptr[0] & 0x0f);
+ /*
+ * Check the received ALUA access state, and determine if
+ * the state is a primary or secondary target port asymmetric
+ * access state.
+ */
+ rc = core_alua_check_transition(alua_access_state, &primary);
+ if (rc != 0) {
+ /*
+ * If the SET TARGET PORT GROUPS attempts to establish
+ * an invalid combination of target port asymmetric
+ * access states or attempts to establish an
+ * unsupported target port asymmetric access state,
+ * then the command shall be terminated with CHECK
+ * CONDITION status, with the sense key set to ILLEGAL
+ * REQUEST, and the additional sense code set to INVALID
+ * FIELD IN PARAMETER LIST.
+ */
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ rc = -EINVAL;
+ goto out;
+ }
+ rc = -1;
+ /*
+ * If the ASYMMETRIC ACCESS STATE field (see table 267)
+ * specifies a primary target port asymmetric access state,
+ * then the TARGET PORT GROUP OR TARGET PORT field specifies
+ * a primary target port group for which the primary target
+ * port asymmetric access state shall be changed. If the
+ * ASYMMETRIC ACCESS STATE field specifies a secondary target
+ * port asymmetric access state, then the TARGET PORT GROUP OR
+ * TARGET PORT field specifies the relative target port
+ * identifier (see 3.1.120) of the target port for which the
+ * secondary target port asymmetric access state shall be
+ * changed.
+ */
+ if (primary) {
+ tg_pt_id = get_unaligned_be16(ptr + 2);
+ /*
+ * Locate the matching target port group ID from
+ * the global tg_pt_gp list
+ */
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp,
+ &su_dev->t10_alua.tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (!tg_pt_gp->tg_pt_gp_valid_id)
+ continue;
+
+ if (tg_pt_id != tg_pt_gp->tg_pt_gp_id)
+ continue;
+
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+
+ rc = core_alua_do_port_transition(tg_pt_gp,
+ dev, l_port, nacl,
+ alua_access_state, 1);
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ break;
+ }
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ /*
+ * If not matching target port group ID can be located
+ * throw an exception with ASCQ: INVALID_PARAMETER_LIST
+ */
+ if (rc != 0) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ rc = -EINVAL;
+ goto out;
+ }
+ } else {
+ /*
+ * Extact the RELATIVE TARGET PORT IDENTIFIER to identify
+ * the Target Port in question for the the incoming
+ * SET_TARGET_PORT_GROUPS op.
+ */
+ rtpi = get_unaligned_be16(ptr + 2);
+ /*
+ * Locate the matching relative target port identifer
+ * for the struct se_device storage object.
+ */
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(port, &dev->dev_sep_list,
+ sep_list) {
+ if (port->sep_rtpi != rtpi)
+ continue;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ spin_unlock(&dev->se_port_lock);
+
+ rc = core_alua_set_tg_pt_secondary_state(
+ tg_pt_gp_mem, port, 1, 1);
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+ /*
+ * If not matching relative target port identifier can
+ * be located, throw an exception with ASCQ:
+ * INVALID_PARAMETER_LIST
+ */
+ if (rc != 0) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+
+ ptr += 4;
+ len += 4;
+ }
+
+out:
+ transport_kunmap_data_sg(cmd);
+ if (!rc) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return rc;
+}
+
+static inline int core_alua_state_nonoptimized(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ int nonop_delay_msecs,
+ u8 *alua_ascq)
+{
+ /*
+ * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked
+ * later to determine if processing of this cmd needs to be
+ * temporarily delayed for the Active/NonOptimized primary access state.
+ */
+ cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED;
+ cmd->alua_nonop_delay = nonop_delay_msecs;
+ return 0;
+}
+
+static inline int core_alua_state_standby(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by
+ * spc4r17 section 5.9.2.4.4
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case LOG_SELECT:
+ case LOG_SENSE:
+ case MODE_SELECT:
+ case MODE_SENSE:
+ case REPORT_LUNS:
+ case RECEIVE_DIAGNOSTIC:
+ case SEND_DIAGNOSTIC:
+ return 0;
+ case MAINTENANCE_IN:
+ switch (cdb[1] & 0x1f) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+ case MAINTENANCE_OUT:
+ switch (cdb[1]) {
+ case MO_SET_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case PERSISTENT_RESERVE_IN:
+ case PERSISTENT_RESERVE_OUT:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline int core_alua_state_unavailable(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by
+ * spc4r17 section 5.9.2.4.5
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ return 0;
+ case MAINTENANCE_IN:
+ switch (cdb[1] & 0x1f) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+ case MAINTENANCE_OUT:
+ switch (cdb[1]) {
+ case MO_SET_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline int core_alua_state_transition(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITIO as defined by
+ * spc4r17 section 5.9.2.5
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ return 0;
+ case MAINTENANCE_IN:
+ switch (cdb[1] & 0x1f) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION;
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Used for alua_type SPC_ALUA_PASSTHROUGH and SPC2_ALUA_DISABLED
+ * in transport_cmd_sequencer(). This function is assigned to
+ * struct t10_alua *->state_check() in core_setup_alua()
+ */
+static int core_alua_state_check_nop(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ return 0;
+}
+
+/*
+ * Used for alua_type SPC3_ALUA_EMULATED in transport_cmd_sequencer().
+ * This function is assigned to struct t10_alua *->state_check() in
+ * core_setup_alua()
+ *
+ * Also, this function can return three different return codes to
+ * signal transport_generic_cmd_sequencer()
+ *
+ * return 1: Is used to signal LUN not accecsable, and check condition/not ready
+ * return 0: Used to signal success
+ * reutrn -1: Used to signal failure, and invalid cdb field
+ */
+static int core_alua_state_check(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ struct se_lun *lun = cmd->se_lun;
+ struct se_port *port = lun->lun_sep;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ int out_alua_state, nonop_delay_msecs;
+
+ if (!port)
+ return 0;
+ /*
+ * First, check for a struct se_port specific secondary ALUA target port
+ * access state: OFFLINE
+ */
+ if (atomic_read(&port->sep_tg_pt_secondary_offline)) {
+ *alua_ascq = ASCQ_04H_ALUA_OFFLINE;
+ pr_debug("ALUA: Got secondary offline status for local"
+ " target port\n");
+ *alua_ascq = ASCQ_04H_ALUA_OFFLINE;
+ return 1;
+ }
+ /*
+ * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the
+ * ALUA target port group, to obtain current ALUA access state.
+ * Otherwise look for the underlying struct se_device association with
+ * a ALUA logical unit group.
+ */
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);
+ nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ /*
+ * Process ALUA_ACCESS_STATE_ACTIVE_OPTMIZED in a separate conditional
+ * statement so the compiler knows explicitly to check this case first.
+ * For the Optimized ALUA access state case, we want to process the
+ * incoming fabric cmd ASAP..
+ */
+ if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTMIZED)
+ return 0;
+
+ switch (out_alua_state) {
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ return core_alua_state_nonoptimized(cmd, cdb,
+ nonop_delay_msecs, alua_ascq);
+ case ALUA_ACCESS_STATE_STANDBY:
+ return core_alua_state_standby(cmd, cdb, alua_ascq);
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ return core_alua_state_unavailable(cmd, cdb, alua_ascq);
+ case ALUA_ACCESS_STATE_TRANSITION:
+ return core_alua_state_transition(cmd, cdb, alua_ascq);
+ /*
+ * OFFLINE is a secondary ALUA target port group access state, that is
+ * handled above with struct se_port->sep_tg_pt_secondary_offline=1
+ */
+ case ALUA_ACCESS_STATE_OFFLINE:
+ default:
+ pr_err("Unknown ALUA access state: 0x%02x\n",
+ out_alua_state);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Check implict and explict ALUA state change request.
+ */
+static int core_alua_check_transition(int state, int *primary)
+{
+ switch (state) {
+ case ALUA_ACCESS_STATE_ACTIVE_OPTMIZED:
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ case ALUA_ACCESS_STATE_STANDBY:
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ /*
+ * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are
+ * defined as primary target port asymmetric access states.
+ */
+ *primary = 1;
+ break;
+ case ALUA_ACCESS_STATE_OFFLINE:
+ /*
+ * OFFLINE state is defined as a secondary target port
+ * asymmetric access state.
+ */
+ *primary = 0;
+ break;
+ default:
+ pr_err("Unknown ALUA access state: 0x%02x\n", state);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static char *core_alua_dump_state(int state)
+{
+ switch (state) {
+ case ALUA_ACCESS_STATE_ACTIVE_OPTMIZED:
+ return "Active/Optimized";
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ return "Active/NonOptimized";
+ case ALUA_ACCESS_STATE_STANDBY:
+ return "Standby";
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ return "Unavailable";
+ case ALUA_ACCESS_STATE_OFFLINE:
+ return "Offline";
+ default:
+ return "Unknown";
+ }
+
+ return NULL;
+}
+
+char *core_alua_dump_status(int status)
+{
+ switch (status) {
+ case ALUA_STATUS_NONE:
+ return "None";
+ case ALUA_STATUS_ALTERED_BY_EXPLICT_STPG:
+ return "Altered by Explict STPG";
+ case ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA:
+ return "Altered by Implict ALUA";
+ default:
+ return "Unknown";
+ }
+
+ return NULL;
+}
+
+/*
+ * Used by fabric modules to determine when we need to delay processing
+ * for the Active/NonOptimized paths..
+ */
+int core_alua_check_nonop_delay(
+ struct se_cmd *cmd)
+{
+ if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED))
+ return 0;
+ if (in_interrupt())
+ return 0;
+ /*
+ * The ALUA Active/NonOptimized access state delay can be disabled
+ * in via configfs with a value of zero
+ */
+ if (!cmd->alua_nonop_delay)
+ return 0;
+ /*
+ * struct se_cmd->alua_nonop_delay gets set by a target port group
+ * defined interval in core_alua_state_nonoptimized()
+ */
+ msleep_interruptible(cmd->alua_nonop_delay);
+ return 0;
+}
+EXPORT_SYMBOL(core_alua_check_nonop_delay);
+
+/*
+ * Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex
+ *
+ */
+static int core_alua_write_tpg_metadata(
+ const char *path,
+ unsigned char *md_buf,
+ u32 md_buf_len)
+{
+ mm_segment_t old_fs;
+ struct file *file;
+ struct iovec iov[1];
+ int flags = O_RDWR | O_CREAT | O_TRUNC, ret;
+
+ memset(iov, 0, sizeof(struct iovec));
+
+ file = filp_open(path, flags, 0600);
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ pr_err("filp_open(%s) for ALUA metadata failed\n",
+ path);
+ return -ENODEV;
+ }
+
+ iov[0].iov_base = &md_buf[0];
+ iov[0].iov_len = md_buf_len;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(file, &iov[0], 1, &file->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ pr_err("Error writing ALUA metadata file: %s\n", path);
+ filp_close(file, NULL);
+ return -EIO;
+ }
+ filp_close(file, NULL);
+
+ return 0;
+}
+
+/*
+ * Called with tg_pt_gp->tg_pt_gp_md_mutex held
+ */
+static int core_alua_update_tpg_primary_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ int primary_state,
+ unsigned char *md_buf)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_wwn *wwn = &su_dev->t10_wwn;
+ char path[ALUA_METADATA_PATH_LEN];
+ int len;
+
+ memset(path, 0, ALUA_METADATA_PATH_LEN);
+
+ len = snprintf(md_buf, tg_pt_gp->tg_pt_gp_md_buf_len,
+ "tg_pt_gp_id=%hu\n"
+ "alua_access_state=0x%02x\n"
+ "alua_access_status=0x%02x\n",
+ tg_pt_gp->tg_pt_gp_id, primary_state,
+ tg_pt_gp->tg_pt_gp_alua_access_status);
+
+ snprintf(path, ALUA_METADATA_PATH_LEN,
+ "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0],
+ config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item));
+
+ return core_alua_write_tpg_metadata(path, md_buf, len);
+}
+
+static int core_alua_do_transition_tg_pt(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ struct se_port *l_port,
+ struct se_node_acl *nacl,
+ unsigned char *md_buf,
+ int new_state,
+ int explict)
+{
+ struct se_dev_entry *se_deve;
+ struct se_lun_acl *lacl;
+ struct se_port *port;
+ struct t10_alua_tg_pt_gp_member *mem;
+ int old_state = 0;
+ /*
+ * Save the old primary ALUA access state, and set the current state
+ * to ALUA_ACCESS_STATE_TRANSITION.
+ */
+ old_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state,
+ ALUA_ACCESS_STATE_TRANSITION);
+ tg_pt_gp->tg_pt_gp_alua_access_status = (explict) ?
+ ALUA_STATUS_ALTERED_BY_EXPLICT_STPG :
+ ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA;
+ /*
+ * Check for the optional ALUA primary state transition delay
+ */
+ if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0)
+ msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = mem->tg_pt;
+ /*
+ * After an implicit target port asymmetric access state
+ * change, a device server shall establish a unit attention
+ * condition for the initiator port associated with every I_T
+ * nexus with the additional sense code set to ASYMMETRIC
+ * ACCESS STATE CHAGED.
+ *
+ * After an explicit target port asymmetric access state
+ * change, a device server shall establish a unit attention
+ * condition with the additional sense code set to ASYMMETRIC
+ * ACCESS STATE CHANGED for the initiator port associated with
+ * every I_T nexus other than the I_T nexus on which the SET
+ * TARGET PORT GROUPS command
+ */
+ atomic_inc(&mem->tg_pt_gp_mem_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_for_each_entry(se_deve, &port->sep_alua_list,
+ alua_port_list) {
+ lacl = se_deve->se_lun_acl;
+ /*
+ * se_deve->se_lun_acl pointer may be NULL for a
+ * entry created without explict Node+MappedLUN ACLs
+ */
+ if (!lacl)
+ continue;
+
+ if (explict &&
+ (nacl != NULL) && (nacl == lacl->se_lun_nacl) &&
+ (l_port != NULL) && (l_port == port))
+ continue;
+
+ core_scsi3_ua_allocate(lacl->se_lun_nacl,
+ se_deve->mapped_lun, 0x2A,
+ ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
+ }
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ atomic_dec(&mem->tg_pt_gp_mem_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ /*
+ * Update the ALUA metadata buf that has been allocated in
+ * core_alua_do_port_transition(), this metadata will be written
+ * to struct file.
+ *
+ * Note that there is the case where we do not want to update the
+ * metadata when the saved metadata is being parsed in userspace
+ * when setting the existing port access state and access status.
+ *
+ * Also note that the failure to write out the ALUA metadata to
+ * struct file does NOT affect the actual ALUA transition.
+ */
+ if (tg_pt_gp->tg_pt_gp_write_metadata) {
+ mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex);
+ core_alua_update_tpg_primary_metadata(tg_pt_gp,
+ new_state, md_buf);
+ mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex);
+ }
+ /*
+ * Set the current primary ALUA access state to the requested new state
+ */
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, new_state);
+
+ pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu"
+ " from primary access state %s to %s\n", (explict) ? "explict" :
+ "implict", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id, core_alua_dump_state(old_state),
+ core_alua_dump_state(new_state));
+
+ return 0;
+}
+
+int core_alua_do_port_transition(
+ struct t10_alua_tg_pt_gp *l_tg_pt_gp,
+ struct se_device *l_dev,
+ struct se_port *l_port,
+ struct se_node_acl *l_nacl,
+ int new_state,
+ int explict)
+{
+ struct se_device *dev;
+ struct se_port *port;
+ struct se_subsystem_dev *su_dev;
+ struct se_node_acl *nacl;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ unsigned char *md_buf;
+ int primary;
+
+ if (core_alua_check_transition(new_state, &primary) != 0)
+ return -EINVAL;
+
+ md_buf = kzalloc(l_tg_pt_gp->tg_pt_gp_md_buf_len, GFP_KERNEL);
+ if (!md_buf) {
+ pr_err("Unable to allocate buf for ALUA metadata\n");
+ return -ENOMEM;
+ }
+
+ local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem;
+ spin_lock(&local_lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = local_lu_gp_mem->lu_gp;
+ atomic_inc(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock);
+ /*
+ * For storage objects that are members of the 'default_lu_gp',
+ * we only do transition on the passed *l_tp_pt_gp, and not
+ * on all of the matching target port groups IDs in default_lu_gp.
+ */
+ if (!lu_gp->lu_gp_id) {
+ /*
+ * core_alua_do_transition_tg_pt() will always return
+ * success.
+ */
+ core_alua_do_transition_tg_pt(l_tg_pt_gp, l_port, l_nacl,
+ md_buf, new_state, explict);
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ kfree(md_buf);
+ return 0;
+ }
+ /*
+ * For all other LU groups aside from 'default_lu_gp', walk all of
+ * the associated storage objects looking for a matching target port
+ * group ID from the local target port group.
+ */
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list,
+ lu_gp_mem_list) {
+
+ dev = lu_gp_mem->lu_gp_mem_dev;
+ su_dev = dev->se_sub_dev;
+ atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp,
+ &su_dev->t10_alua.tg_pt_gps_list,
+ tg_pt_gp_list) {
+
+ if (!tg_pt_gp->tg_pt_gp_valid_id)
+ continue;
+ /*
+ * If the target behavior port asymmetric access state
+ * is changed for any target port group accessiable via
+ * a logical unit within a LU group, the target port
+ * behavior group asymmetric access states for the same
+ * target port group accessible via other logical units
+ * in that LU group will also change.
+ */
+ if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id)
+ continue;
+
+ if (l_tg_pt_gp == tg_pt_gp) {
+ port = l_port;
+ nacl = l_nacl;
+ } else {
+ port = NULL;
+ nacl = NULL;
+ }
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ /*
+ * core_alua_do_transition_tg_pt() will always return
+ * success.
+ */
+ core_alua_do_transition_tg_pt(tg_pt_gp, port,
+ nacl, md_buf, new_state, explict);
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ pr_debug("Successfully processed LU Group: %s all ALUA TG PT"
+ " Group IDs: %hu %s transition to primary state: %s\n",
+ config_item_name(&lu_gp->lu_gp_group.cg_item),
+ l_tg_pt_gp->tg_pt_gp_id, (explict) ? "explict" : "implict",
+ core_alua_dump_state(new_state));
+
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ kfree(md_buf);
+ return 0;
+}
+
+/*
+ * Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held
+ */
+static int core_alua_update_tpg_secondary_metadata(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port,
+ unsigned char *md_buf,
+ u32 md_buf_len)
+{
+ struct se_portal_group *se_tpg = port->sep_tpg;
+ char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN];
+ int len;
+
+ memset(path, 0, ALUA_METADATA_PATH_LEN);
+ memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN);
+
+ len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s",
+ se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg));
+
+ if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL)
+ snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu",
+ se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
+
+ len = snprintf(md_buf, md_buf_len, "alua_tg_pt_offline=%d\n"
+ "alua_tg_pt_status=0x%02x\n",
+ atomic_read(&port->sep_tg_pt_secondary_offline),
+ port->sep_tg_pt_secondary_stat);
+
+ snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u",
+ se_tpg->se_tpg_tfo->get_fabric_name(), wwn,
+ port->sep_lun->unpacked_lun);
+
+ return core_alua_write_tpg_metadata(path, md_buf, len);
+}
+
+static int core_alua_set_tg_pt_secondary_state(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port,
+ int explict,
+ int offline)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ unsigned char *md_buf;
+ u32 md_buf_len;
+ int trans_delay_msecs;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (!tg_pt_gp) {
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ pr_err("Unable to complete secondary state"
+ " transition\n");
+ return -EINVAL;
+ }
+ trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs;
+ /*
+ * Set the secondary ALUA target port access state to OFFLINE
+ * or release the previously secondary state for struct se_port
+ */
+ if (offline)
+ atomic_set(&port->sep_tg_pt_secondary_offline, 1);
+ else
+ atomic_set(&port->sep_tg_pt_secondary_offline, 0);
+
+ md_buf_len = tg_pt_gp->tg_pt_gp_md_buf_len;
+ port->sep_tg_pt_secondary_stat = (explict) ?
+ ALUA_STATUS_ALTERED_BY_EXPLICT_STPG :
+ ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA;
+
+ pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu"
+ " to secondary access state: %s\n", (explict) ? "explict" :
+ "implict", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE");
+
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ /*
+ * Do the optional transition delay after we set the secondary
+ * ALUA access state.
+ */
+ if (trans_delay_msecs != 0)
+ msleep_interruptible(trans_delay_msecs);
+ /*
+ * See if we need to update the ALUA fabric port metadata for
+ * secondary state and status
+ */
+ if (port->sep_tg_pt_secondary_write_md) {
+ md_buf = kzalloc(md_buf_len, GFP_KERNEL);
+ if (!md_buf) {
+ pr_err("Unable to allocate md_buf for"
+ " secondary ALUA access metadata\n");
+ return -ENOMEM;
+ }
+ mutex_lock(&port->sep_tg_pt_md_mutex);
+ core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port,
+ md_buf, md_buf_len);
+ mutex_unlock(&port->sep_tg_pt_md_mutex);
+
+ kfree(md_buf);
+ }
+
+ return 0;
+}
+
+struct t10_alua_lu_gp *
+core_alua_allocate_lu_gp(const char *name, int def_group)
+{
+ struct t10_alua_lu_gp *lu_gp;
+
+ lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL);
+ if (!lu_gp) {
+ pr_err("Unable to allocate struct t10_alua_lu_gp\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&lu_gp->lu_gp_node);
+ INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list);
+ spin_lock_init(&lu_gp->lu_gp_lock);
+ atomic_set(&lu_gp->lu_gp_ref_cnt, 0);
+
+ if (def_group) {
+ lu_gp->lu_gp_id = alua_lu_gps_counter++;
+ lu_gp->lu_gp_valid_id = 1;
+ alua_lu_gps_count++;
+ }
+
+ return lu_gp;
+}
+
+int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id)
+{
+ struct t10_alua_lu_gp *lu_gp_tmp;
+ u16 lu_gp_id_tmp;
+ /*
+ * The lu_gp->lu_gp_id may only be set once..
+ */
+ if (lu_gp->lu_gp_valid_id) {
+ pr_warn("ALUA LU Group already has a valid ID,"
+ " ignoring request\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&lu_gps_lock);
+ if (alua_lu_gps_count == 0x0000ffff) {
+ pr_err("Maximum ALUA alua_lu_gps_count:"
+ " 0x0000ffff reached\n");
+ spin_unlock(&lu_gps_lock);
+ kmem_cache_free(t10_alua_lu_gp_cache, lu_gp);
+ return -ENOSPC;
+ }
+again:
+ lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id :
+ alua_lu_gps_counter++;
+
+ list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) {
+ if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) {
+ if (!lu_gp_id)
+ goto again;
+
+ pr_warn("ALUA Logical Unit Group ID: %hu"
+ " already exists, ignoring request\n",
+ lu_gp_id);
+ spin_unlock(&lu_gps_lock);
+ return -EINVAL;
+ }
+ }
+
+ lu_gp->lu_gp_id = lu_gp_id_tmp;
+ lu_gp->lu_gp_valid_id = 1;
+ list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list);
+ alua_lu_gps_count++;
+ spin_unlock(&lu_gps_lock);
+
+ return 0;
+}
+
+static struct t10_alua_lu_gp_member *
+core_alua_allocate_lu_gp_mem(struct se_device *dev)
+{
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+
+ lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL);
+ if (!lu_gp_mem) {
+ pr_err("Unable to allocate struct t10_alua_lu_gp_member\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list);
+ spin_lock_init(&lu_gp_mem->lu_gp_mem_lock);
+ atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0);
+
+ lu_gp_mem->lu_gp_mem_dev = dev;
+ dev->dev_alua_lu_gp_mem = lu_gp_mem;
+
+ return lu_gp_mem;
+}
+
+void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp)
+{
+ struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp;
+ /*
+ * Once we have reached this point, config_item_put() has
+ * already been called from target_core_alua_drop_lu_gp().
+ *
+ * Here, we remove the *lu_gp from the global list so that
+ * no associations can be made while we are releasing
+ * struct t10_alua_lu_gp.
+ */
+ spin_lock(&lu_gps_lock);
+ list_del(&lu_gp->lu_gp_node);
+ alua_lu_gps_count--;
+ spin_unlock(&lu_gps_lock);
+ /*
+ * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name()
+ * in target_core_configfs.c:target_core_store_alua_lu_gp() to be
+ * released with core_alua_put_lu_gp_from_name()
+ */
+ while (atomic_read(&lu_gp->lu_gp_ref_cnt))
+ cpu_relax();
+ /*
+ * Release reference to struct t10_alua_lu_gp * from all associated
+ * struct se_device.
+ */
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp,
+ &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
+ if (lu_gp_mem->lu_gp_assoc) {
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp->lu_gp_members--;
+ lu_gp_mem->lu_gp_assoc = 0;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+ /*
+ *
+ * lu_gp_mem is associated with a single
+ * struct se_device->dev_alua_lu_gp_mem, and is released when
+ * struct se_device is released via core_alua_free_lu_gp_mem().
+ *
+ * If the passed lu_gp does NOT match the default_lu_gp, assume
+ * we want to re-assocate a given lu_gp_mem with default_lu_gp.
+ */
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ if (lu_gp != default_lu_gp)
+ __core_alua_attach_lu_gp_mem(lu_gp_mem,
+ default_lu_gp);
+ else
+ lu_gp_mem->lu_gp = NULL;
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ kmem_cache_free(t10_alua_lu_gp_cache, lu_gp);
+}
+
+void core_alua_free_lu_gp_mem(struct se_device *dev)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_alua *alua = &su_dev->t10_alua;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem)
+ return;
+
+ while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt))
+ cpu_relax();
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (lu_gp) {
+ spin_lock(&lu_gp->lu_gp_lock);
+ if (lu_gp_mem->lu_gp_assoc) {
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp->lu_gp_members--;
+ lu_gp_mem->lu_gp_assoc = 0;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+ lu_gp_mem->lu_gp = NULL;
+ }
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem);
+}
+
+struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name)
+{
+ struct t10_alua_lu_gp *lu_gp;
+ struct config_item *ci;
+
+ spin_lock(&lu_gps_lock);
+ list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) {
+ if (!lu_gp->lu_gp_valid_id)
+ continue;
+ ci = &lu_gp->lu_gp_group.cg_item;
+ if (!strcmp(config_item_name(ci), name)) {
+ atomic_inc(&lu_gp->lu_gp_ref_cnt);
+ spin_unlock(&lu_gps_lock);
+ return lu_gp;
+ }
+ }
+ spin_unlock(&lu_gps_lock);
+
+ return NULL;
+}
+
+void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&lu_gps_lock);
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ spin_unlock(&lu_gps_lock);
+}
+
+/*
+ * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock
+ */
+void __core_alua_attach_lu_gp_mem(
+ struct t10_alua_lu_gp_member *lu_gp_mem,
+ struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&lu_gp->lu_gp_lock);
+ lu_gp_mem->lu_gp = lu_gp;
+ lu_gp_mem->lu_gp_assoc = 1;
+ list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list);
+ lu_gp->lu_gp_members++;
+ spin_unlock(&lu_gp->lu_gp_lock);
+}
+
+/*
+ * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock
+ */
+void __core_alua_drop_lu_gp_mem(
+ struct t10_alua_lu_gp_member *lu_gp_mem,
+ struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp_mem->lu_gp = NULL;
+ lu_gp_mem->lu_gp_assoc = 0;
+ lu_gp->lu_gp_members--;
+ spin_unlock(&lu_gp->lu_gp_lock);
+}
+
+struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
+ struct se_subsystem_dev *su_dev,
+ const char *name,
+ int def_group)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+
+ tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL);
+ if (!tg_pt_gp) {
+ pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list);
+ INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list);
+ mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex);
+ spin_lock_init(&tg_pt_gp->tg_pt_gp_lock);
+ atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0);
+ tg_pt_gp->tg_pt_gp_su_dev = su_dev;
+ tg_pt_gp->tg_pt_gp_md_buf_len = ALUA_MD_BUF_LEN;
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state,
+ ALUA_ACCESS_STATE_ACTIVE_OPTMIZED);
+ /*
+ * Enable both explict and implict ALUA support by default
+ */
+ tg_pt_gp->tg_pt_gp_alua_access_type =
+ TPGS_EXPLICT_ALUA | TPGS_IMPLICT_ALUA;
+ /*
+ * Set the default Active/NonOptimized Delay in milliseconds
+ */
+ tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS;
+ tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS;
+
+ if (def_group) {
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ tg_pt_gp->tg_pt_gp_id =
+ su_dev->t10_alua.alua_tg_pt_gps_counter++;
+ tg_pt_gp->tg_pt_gp_valid_id = 1;
+ su_dev->t10_alua.alua_tg_pt_gps_count++;
+ list_add_tail(&tg_pt_gp->tg_pt_gp_list,
+ &su_dev->t10_alua.tg_pt_gps_list);
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ }
+
+ return tg_pt_gp;
+}
+
+int core_alua_set_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ u16 tg_pt_gp_id)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_alua_tg_pt_gp *tg_pt_gp_tmp;
+ u16 tg_pt_gp_id_tmp;
+ /*
+ * The tg_pt_gp->tg_pt_gp_id may only be set once..
+ */
+ if (tg_pt_gp->tg_pt_gp_valid_id) {
+ pr_warn("ALUA TG PT Group already has a valid ID,"
+ " ignoring request\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ if (su_dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) {
+ pr_err("Maximum ALUA alua_tg_pt_gps_count:"
+ " 0x0000ffff reached\n");
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
+ return -ENOSPC;
+ }
+again:
+ tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id :
+ su_dev->t10_alua.alua_tg_pt_gps_counter++;
+
+ list_for_each_entry(tg_pt_gp_tmp, &su_dev->t10_alua.tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) {
+ if (!tg_pt_gp_id)
+ goto again;
+
+ pr_err("ALUA Target Port Group ID: %hu already"
+ " exists, ignoring request\n", tg_pt_gp_id);
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ return -EINVAL;
+ }
+ }
+
+ tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp;
+ tg_pt_gp->tg_pt_gp_valid_id = 1;
+ list_add_tail(&tg_pt_gp->tg_pt_gp_list,
+ &su_dev->t10_alua.tg_pt_gps_list);
+ su_dev->t10_alua.alua_tg_pt_gps_count++;
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+
+ return 0;
+}
+
+struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
+ struct se_port *port)
+{
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache,
+ GFP_KERNEL);
+ if (!tg_pt_gp_mem) {
+ pr_err("Unable to allocate struct t10_alua_tg_pt_gp_member\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0);
+
+ tg_pt_gp_mem->tg_pt = port;
+ port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem;
+
+ return tg_pt_gp_mem;
+}
+
+void core_alua_free_tg_pt_gp(
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp;
+ /*
+ * Once we have reached this point, config_item_put() has already
+ * been called from target_core_alua_drop_tg_pt_gp().
+ *
+ * Here we remove *tg_pt_gp from the global list so that
+ * no assications *OR* explict ALUA via SET_TARGET_PORT_GROUPS
+ * can be made while we are releasing struct t10_alua_tg_pt_gp.
+ */
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ list_del(&tg_pt_gp->tg_pt_gp_list);
+ su_dev->t10_alua.alua_tg_pt_gps_counter--;
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ /*
+ * Allow a struct t10_alua_tg_pt_gp_member * referenced by
+ * core_alua_get_tg_pt_gp_by_name() in
+ * target_core_configfs.c:target_core_store_alua_tg_pt_gp()
+ * to be released with core_alua_put_tg_pt_gp_from_name().
+ */
+ while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt))
+ cpu_relax();
+ /*
+ * Release reference to struct t10_alua_tg_pt_gp from all associated
+ * struct se_port.
+ */
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp,
+ &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) {
+ if (tg_pt_gp_mem->tg_pt_gp_assoc) {
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members--;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ /*
+ * tg_pt_gp_mem is associated with a single
+ * se_port->sep_alua_tg_pt_gp_mem, and is released via
+ * core_alua_free_tg_pt_gp_mem().
+ *
+ * If the passed tg_pt_gp does NOT match the default_tg_pt_gp,
+ * assume we want to re-assocate a given tg_pt_gp_mem with
+ * default_tg_pt_gp.
+ */
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ if (tg_pt_gp != su_dev->t10_alua.default_tg_pt_gp) {
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ su_dev->t10_alua.default_tg_pt_gp);
+ } else
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
+}
+
+void core_alua_free_tg_pt_gp_mem(struct se_port *port)
+{
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct t10_alua *alua = &su_dev->t10_alua;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ return;
+
+ while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt))
+ cpu_relax();
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp) {
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ if (tg_pt_gp_mem->tg_pt_gp_assoc) {
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members--;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ }
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem);
+}
+
+static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name(
+ struct se_subsystem_dev *su_dev,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct config_item *ci;
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp, &su_dev->t10_alua.tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (!tg_pt_gp->tg_pt_gp_valid_id)
+ continue;
+ ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
+ if (!strcmp(config_item_name(ci), name)) {
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+ return tg_pt_gp;
+ }
+ }
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+
+ return NULL;
+}
+
+static void core_alua_put_tg_pt_gp_from_name(
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+
+ spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+}
+
+/*
+ * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
+ */
+void __core_alua_attach_tg_pt_gp_mem(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ tg_pt_gp_mem->tg_pt_gp = tg_pt_gp;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 1;
+ list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list,
+ &tg_pt_gp->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members++;
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+}
+
+/*
+ * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
+ */
+static void __core_alua_drop_tg_pt_gp_mem(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ tg_pt_gp->tg_pt_gp_members--;
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+}
+
+ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page)
+{
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct config_item *tg_pt_ci;
+ struct t10_alua *alua = &su_dev->t10_alua;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ ssize_t len = 0;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return len;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ return len;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp) {
+ tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
+ len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:"
+ " %hu\nTG Port Primary Access State: %s\nTG Port "
+ "Primary Access Status: %s\nTG Port Secondary Access"
+ " State: %s\nTG Port Secondary Access Status: %s\n",
+ config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id,
+ core_alua_dump_state(atomic_read(
+ &tg_pt_gp->tg_pt_gp_alua_access_state)),
+ core_alua_dump_status(
+ tg_pt_gp->tg_pt_gp_alua_access_status),
+ (atomic_read(&port->sep_tg_pt_secondary_offline)) ?
+ "Offline" : "None",
+ core_alua_dump_status(port->sep_tg_pt_secondary_stat));
+ }
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ return len;
+}
+
+ssize_t core_alua_store_tg_pt_gp_info(
+ struct se_port *port,
+ const char *page,
+ size_t count)
+{
+ struct se_portal_group *tpg;
+ struct se_lun *lun;
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char buf[TG_PT_GROUP_NAME_BUF];
+ int move = 0;
+
+ tpg = port->sep_tpg;
+ lun = port->sep_lun;
+
+ if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
+ pr_warn("SPC3_ALUA_EMULATED not enabled for"
+ " %s/tpgt_%hu/%s\n", tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item));
+ return -EINVAL;
+ }
+
+ if (count > TG_PT_GROUP_NAME_BUF) {
+ pr_err("ALUA Target Port Group alias too large!\n");
+ return -EINVAL;
+ }
+ memset(buf, 0, TG_PT_GROUP_NAME_BUF);
+ memcpy(buf, page, count);
+ /*
+ * Any ALUA target port group alias besides "NULL" means we will be
+ * making a new group association.
+ */
+ if (strcmp(strstrip(buf), "NULL")) {
+ /*
+ * core_alua_get_tg_pt_gp_by_name() will increment reference to
+ * struct t10_alua_tg_pt_gp. This reference is released with
+ * core_alua_put_tg_pt_gp_from_name() below.
+ */
+ tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(su_dev,
+ strstrip(buf));
+ if (!tg_pt_gp_new)
+ return -ENODEV;
+ }
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem) {
+ if (tg_pt_gp_new)
+ core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new);
+ pr_err("NULL struct se_port->sep_alua_tg_pt_gp_mem pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp) {
+ /*
+ * Clearing an existing tg_pt_gp association, and replacing
+ * with the default_tg_pt_gp.
+ */
+ if (!tg_pt_gp_new) {
+ pr_debug("Target_Core_ConfigFS: Moving"
+ " %s/tpgt_%hu/%s from ALUA Target Port Group:"
+ " alua/%s, ID: %hu back to"
+ " default_tg_pt_gp\n",
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item),
+ config_item_name(
+ &tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id);
+
+ __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ su_dev->t10_alua.default_tg_pt_gp);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ return count;
+ }
+ /*
+ * Removing existing association of tg_pt_gp_mem with tg_pt_gp
+ */
+ __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
+ move = 1;
+ }
+ /*
+ * Associate tg_pt_gp_mem with tg_pt_gp_new.
+ */
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA"
+ " Target Port Group: alua/%s, ID: %hu\n", (move) ?
+ "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item),
+ config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item),
+ tg_pt_gp_new->tg_pt_gp_id);
+
+ core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new);
+ return count;
+}
+
+ssize_t core_alua_show_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA) &&
+ (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA))
+ return sprintf(page, "Implict and Explict\n");
+ else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)
+ return sprintf(page, "Implict\n");
+ else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA)
+ return sprintf(page, "Explict\n");
+ else
+ return sprintf(page, "None\n");
+}
+
+ssize_t core_alua_store_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_access_type\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) {
+ pr_err("Illegal value for alua_access_type:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ if (tmp == 3)
+ tg_pt_gp->tg_pt_gp_alua_access_type =
+ TPGS_IMPLICT_ALUA | TPGS_EXPLICT_ALUA;
+ else if (tmp == 2)
+ tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICT_ALUA;
+ else if (tmp == 1)
+ tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICT_ALUA;
+ else
+ tg_pt_gp->tg_pt_gp_alua_access_type = 0;
+
+ return count;
+}
+
+ssize_t core_alua_show_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs);
+}
+
+ssize_t core_alua_store_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract nonop_delay_msecs\n");
+ return -EINVAL;
+ }
+ if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) {
+ pr_err("Passed nonop_delay_msecs: %lu, exceeds"
+ " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp,
+ ALUA_MAX_NONOP_DELAY_MSECS);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs);
+}
+
+ssize_t core_alua_store_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract trans_delay_msecs\n");
+ return -EINVAL;
+ }
+ if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) {
+ pr_err("Passed trans_delay_msecs: %lu, exceeds"
+ " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp,
+ ALUA_MAX_TRANS_DELAY_MSECS);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_preferred_bit(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref);
+}
+
+ssize_t core_alua_store_preferred_bit(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract preferred ALUA value\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for preferred ALUA: %lu\n", tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_pref = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page)
+{
+ if (!lun->lun_sep)
+ return -ENODEV;
+
+ return sprintf(page, "%d\n",
+ atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline));
+}
+
+ssize_t core_alua_store_offline_bit(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned long tmp;
+ int ret;
+
+ if (!lun->lun_sep)
+ return -ENODEV;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_tg_pt_offline value\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for alua_tg_pt_offline: %lu\n",
+ tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem) {
+ pr_err("Unable to locate *tg_pt_gp_mem\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem,
+ lun->lun_sep, 0, (int)tmp);
+ if (ret < 0)
+ return -EINVAL;
+
+ return count;
+}
+
+ssize_t core_alua_show_secondary_status(
+ struct se_lun *lun,
+ char *page)
+{
+ return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat);
+}
+
+ssize_t core_alua_store_secondary_status(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_tg_pt_status\n");
+ return -EINVAL;
+ }
+ if ((tmp != ALUA_STATUS_NONE) &&
+ (tmp != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
+ (tmp != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
+ pr_err("Illegal value for alua_tg_pt_status: %lu\n",
+ tmp);
+ return -EINVAL;
+ }
+ lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_secondary_write_metadata(
+ struct se_lun *lun,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ lun->lun_sep->sep_tg_pt_secondary_write_md);
+}
+
+ssize_t core_alua_store_secondary_write_metadata(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_tg_pt_write_md\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for alua_tg_pt_write_md:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp;
+
+ return count;
+}
+
+int core_setup_alua(struct se_device *dev, int force_pt)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_alua *alua = &su_dev->t10_alua;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, use the ALUA logic
+ * of the Underlying SCSI hardware. In Linux/SCSI terms, this can
+ * cause a problem because libata and some SATA RAID HBAs appear
+ * under Linux/SCSI, but emulate SCSI logic themselves.
+ */
+ if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
+ !(dev->se_sub_dev->se_dev_attrib.emulate_alua)) || force_pt) {
+ alua->alua_type = SPC_ALUA_PASSTHROUGH;
+ alua->alua_state_check = &core_alua_state_check_nop;
+ pr_debug("%s: Using SPC_ALUA_PASSTHROUGH, no ALUA"
+ " emulation\n", dev->transport->name);
+ return 0;
+ }
+ /*
+ * If SPC-3 or above is reported by real or emulated struct se_device,
+ * use emulated ALUA.
+ */
+ if (dev->transport->get_device_rev(dev) >= SCSI_3) {
+ pr_debug("%s: Enabling ALUA Emulation for SPC-3"
+ " device\n", dev->transport->name);
+ /*
+ * Associate this struct se_device with the default ALUA
+ * LUN Group.
+ */
+ lu_gp_mem = core_alua_allocate_lu_gp_mem(dev);
+ if (IS_ERR(lu_gp_mem))
+ return PTR_ERR(lu_gp_mem);
+
+ alua->alua_type = SPC3_ALUA_EMULATED;
+ alua->alua_state_check = &core_alua_state_check;
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ __core_alua_attach_lu_gp_mem(lu_gp_mem,
+ default_lu_gp);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ pr_debug("%s: Adding to default ALUA LU Group:"
+ " core/alua/lu_gps/default_lu_gp\n",
+ dev->transport->name);
+ } else {
+ alua->alua_type = SPC2_ALUA_DISABLED;
+ alua->alua_state_check = &core_alua_state_check_nop;
+ pr_debug("%s: Disabling ALUA Emulation for SPC-2"
+ " device\n", dev->transport->name);
+ }
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.h
new file mode 100644
index 0000000..c5b4ecd
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_alua.h
@@ -0,0 +1,126 @@
+#ifndef TARGET_CORE_ALUA_H
+#define TARGET_CORE_ALUA_H
+
+/*
+ * INQUIRY response data, TPGS Field
+ *
+ * from spc4r17 section 6.4.2 Table 135
+ */
+#define TPGS_NO_ALUA 0x00
+#define TPGS_IMPLICT_ALUA 0x10
+#define TPGS_EXPLICT_ALUA 0x20
+
+/*
+ * ASYMMETRIC ACCESS STATE field
+ *
+ * from spc4r17 section 6.27 Table 245
+ */
+#define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED 0x0
+#define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
+#define ALUA_ACCESS_STATE_STANDBY 0x2
+#define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
+#define ALUA_ACCESS_STATE_OFFLINE 0xe
+#define ALUA_ACCESS_STATE_TRANSITION 0xf
+
+/*
+ * REPORT_TARGET_PORT_GROUP STATUS CODE
+ *
+ * from spc4r17 section 6.27 Table 246
+ */
+#define ALUA_STATUS_NONE 0x00
+#define ALUA_STATUS_ALTERED_BY_EXPLICT_STPG 0x01
+#define ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA 0x02
+
+/*
+ * From spc4r17, Table D.1: ASC and ASCQ Assignement
+ */
+#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
+#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
+#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
+#define ASCQ_04H_ALUA_OFFLINE 0x12
+
+/*
+ * Used as the default for Active/NonOptimized delay (in milliseconds)
+ * This can also be changed via configfs on a per target port group basis..
+ */
+#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
+#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
+/*
+ * Used for implict and explict ALUA transitional delay, that is disabled
+ * by default, and is intended to be used for debugging client side ALUA code.
+ */
+#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
+#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
+/*
+ * Used by core_alua_update_tpg_primary_metadata() and
+ * core_alua_update_tpg_secondary_metadata()
+ */
+#define ALUA_METADATA_PATH_LEN 512
+/*
+ * Used by core_alua_update_tpg_secondary_metadata()
+ */
+#define ALUA_SECONDARY_METADATA_WWN_LEN 256
+
+extern struct kmem_cache *t10_alua_lu_gp_cache;
+extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
+extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
+extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
+
+extern int target_emulate_report_target_port_groups(struct se_task *);
+extern int target_emulate_set_target_port_groups(struct se_task *);
+extern int core_alua_check_nonop_delay(struct se_cmd *);
+extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
+ struct se_device *, struct se_port *,
+ struct se_node_acl *, int, int);
+extern char *core_alua_dump_status(int);
+extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
+extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
+extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
+extern void core_alua_free_lu_gp_mem(struct se_device *);
+extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
+extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
+extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
+ struct t10_alua_lu_gp *);
+extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
+ struct t10_alua_lu_gp *);
+extern void core_alua_drop_lu_gp_dev(struct se_device *);
+extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
+ struct se_subsystem_dev *, const char *, int);
+extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
+extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
+ struct se_port *);
+extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
+extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
+extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
+ struct t10_alua_tg_pt_gp *);
+extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
+extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
+ size_t);
+extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
+extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
+extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
+ size_t);
+extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
+extern ssize_t core_alua_store_secondary_status(struct se_lun *,
+ const char *, size_t);
+extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
+ char *);
+extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
+ const char *, size_t);
+extern int core_setup_alua(struct se_device *, int);
+
+#endif /* TARGET_CORE_ALUA_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_cdb.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_cdb.c
new file mode 100644
index 0000000..2d88ce8
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_cdb.c
@@ -0,0 +1,1216 @@
+/*
+ * CDB emulation for non-READ/WRITE commands.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+
+#include "target_core_internal.h"
+#include "target_core_ua.h"
+
+static void
+target_fill_alua_data(struct se_port *port, unsigned char *buf)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ /*
+ * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
+ */
+ buf[5] = 0x80;
+
+ /*
+ * Set TPGS field for explict and/or implict ALUA access type
+ * and opteration.
+ *
+ * See spc4r17 section 6.4.2 Table 135
+ */
+ if (!port)
+ return;
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ return;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp)
+ buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+}
+
+static int
+target_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
+{
+ struct se_lun *lun = cmd->se_lun;
+ struct se_device *dev = cmd->se_dev;
+
+ /* Set RMB (removable media) for tape devices */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE)
+ buf[1] = 0x80;
+
+ buf[2] = dev->transport->get_device_rev(dev);
+
+ /*
+ * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
+ *
+ * SPC4 says:
+ * A RESPONSE DATA FORMAT field set to 2h indicates that the
+ * standard INQUIRY data is in the format defined in this
+ * standard. Response data format values less than 2h are
+ * obsolete. Response data format values greater than 2h are
+ * reserved.
+ */
+ buf[3] = 2;
+
+ /*
+ * Enable SCCS and TPGS fields for Emulated ALUA
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
+ target_fill_alua_data(lun->lun_sep, buf);
+
+ buf[7] = 0x2; /* CmdQue=1 */
+
+ memcpy(&buf[8], "LIO-ORG ", 8);
+ memset(&buf[16], 0x20, 16);
+ memcpy(&buf[16], dev->se_sub_dev->t10_wwn.model,
+ min_t(size_t, strlen(dev->se_sub_dev->t10_wwn.model), 16));
+ memcpy(&buf[32], dev->se_sub_dev->t10_wwn.revision,
+ min_t(size_t, strlen(dev->se_sub_dev->t10_wwn.revision), 4));
+ buf[4] = 31; /* Set additional length to 31 */
+
+ return 0;
+}
+
+/* unit serial number */
+static int
+target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ u16 len = 0;
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ u32 unit_serial_len;
+
+ unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
+ unit_serial_len++; /* For NULL Terminator */
+
+ len += sprintf(&buf[4], "%s",
+ dev->se_sub_dev->t10_wwn.unit_serial);
+ len++; /* Extra Byte for NULL Terminator */
+ buf[3] = len;
+ }
+ return 0;
+}
+
+static void
+target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf)
+{
+ unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
+ int cnt;
+ bool next = true;
+
+ /*
+ * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
+ * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
+ * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
+ * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
+ * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
+ * per device uniqeness.
+ */
+ for (cnt = 0; *p && cnt < 13; p++) {
+ int val = hex_to_bin(*p);
+
+ if (val < 0)
+ continue;
+
+ if (next) {
+ next = false;
+ buf[cnt++] |= val;
+ } else {
+ next = true;
+ buf[cnt] = val << 4;
+ }
+ }
+}
+
+/*
+ * Device identification VPD, for a complete list of
+ * DESIGNATOR TYPEs see spc4r17 Table 459.
+ */
+static int
+target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_lun *lun = cmd->se_lun;
+ struct se_port *port = NULL;
+ struct se_portal_group *tpg = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0];
+ u32 prod_len;
+ u32 unit_serial_len, off = 0;
+ u16 len = 0, id_len;
+
+ off = 4;
+
+ /*
+ * NAA IEEE Registered Extended Assigned designator format, see
+ * spc4r17 section 7.7.3.6.5
+ *
+ * We depend upon a target_core_mod/ConfigFS provided
+ * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
+ * value in order to return the NAA id.
+ */
+ if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
+ goto check_t10_vend_desc;
+
+ /* CODE SET == Binary */
+ buf[off++] = 0x1;
+
+ /* Set ASSOCIATION == addressed logical unit: 0)b */
+ buf[off] = 0x00;
+
+ /* Identifier/Designator type == NAA identifier */
+ buf[off++] |= 0x3;
+ off++;
+
+ /* Identifier/Designator length */
+ buf[off++] = 0x10;
+
+ /*
+ * Start NAA IEEE Registered Extended Identifier/Designator
+ */
+ buf[off++] = (0x6 << 4);
+
+ /*
+ * Use OpenFabrics IEEE Company ID: 00 14 05
+ */
+ buf[off++] = 0x01;
+ buf[off++] = 0x40;
+ buf[off] = (0x5 << 4);
+
+ /*
+ * Return ConfigFS Unit Serial Number information for
+ * VENDOR_SPECIFIC_IDENTIFIER and
+ * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
+ */
+ target_parse_naa_6h_vendor_specific(dev, &buf[off]);
+
+ len = 20;
+ off = (len + 4);
+
+check_t10_vend_desc:
+ /*
+ * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
+ */
+ id_len = 8; /* For Vendor field */
+ prod_len = 4; /* For VPD Header */
+ prod_len += 8; /* For Vendor field */
+ prod_len += strlen(prod);
+ prod_len++; /* For : */
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ unit_serial_len =
+ strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ unit_serial_len++; /* For NULL Terminator */
+
+ id_len += sprintf(&buf[off+12], "%s:%s", prod,
+ &dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ }
+ buf[off] = 0x2; /* ASCII */
+ buf[off+1] = 0x1; /* T10 Vendor ID */
+ buf[off+2] = 0x0;
+ memcpy(&buf[off+4], "LIO-ORG", 8);
+ /* Extra Byte for NULL Terminator */
+ id_len++;
+ /* Identifier Length */
+ buf[off+3] = id_len;
+ /* Header size for Designation descriptor */
+ len += (id_len + 4);
+ off += (id_len + 4);
+ /*
+ * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
+ */
+ port = lun->lun_sep;
+ if (port) {
+ struct t10_alua_lu_gp *lu_gp;
+ u32 padding, scsi_name_len;
+ u16 lu_gp_id = 0;
+ u16 tg_pt_gp_id = 0;
+ u16 tpgt;
+
+ tpg = port->sep_tpg;
+ /*
+ * Relative target port identifer, see spc4r17
+ * section 7.7.3.7
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Relative target port identifer */
+ buf[off++] |= 0x4;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ /* Skip over Obsolete field in RTPI payload
+ * in Table 472 */
+ off += 2;
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Target port group identifier, see spc4r17
+ * section 7.7.3.8
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type !=
+ SPC3_ALUA_EMULATED)
+ goto check_scsi_name;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ goto check_lu_gp;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (!tg_pt_gp) {
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ goto check_lu_gp;
+ }
+ tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Target port group identifier */
+ buf[off++] |= 0x5;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
+ buf[off++] = (tg_pt_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Logical Unit Group identifier, see spc4r17
+ * section 7.7.3.8
+ */
+check_lu_gp:
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem)
+ goto check_scsi_name;
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (!lu_gp) {
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+ goto check_scsi_name;
+ }
+ lu_gp_id = lu_gp->lu_gp_id;
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ /* DESIGNATOR TYPE == Logical Unit Group identifier */
+ buf[off++] |= 0x6;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((lu_gp_id >> 8) & 0xff);
+ buf[off++] = (lu_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * SCSI name string designator, see spc4r17
+ * section 7.7.3.11
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+check_scsi_name:
+ scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
+ /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
+ scsi_name_len += 10;
+ /* Check for 4-byte padding */
+ padding = ((-scsi_name_len) & 3);
+ if (padding != 0)
+ scsi_name_len += padding;
+ /* Header size + Designation descriptor */
+ scsi_name_len += 4;
+
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x3; /* CODE SET == UTF-8 */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == SCSI name string */
+ buf[off++] |= 0x8;
+ off += 2; /* Skip over Reserved and length */
+ /*
+ * SCSI name string identifer containing, $FABRIC_MOD
+ * dependent information. For LIO-Target and iSCSI
+ * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
+ * UTF-8 encoding.
+ */
+ tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
+ scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
+ scsi_name_len += 1 /* Include NULL terminator */;
+ /*
+ * The null-terminated, null-padded (see 4.4.2) SCSI
+ * NAME STRING field contains a UTF-8 format string.
+ * The number of bytes in the SCSI NAME STRING field
+ * (i.e., the value in the DESIGNATOR LENGTH field)
+ * shall be no larger than 256 and shall be a multiple
+ * of four.
+ */
+ if (padding)
+ scsi_name_len += padding;
+
+ buf[off-1] = scsi_name_len;
+ off += scsi_name_len;
+ /* Header size + Designation descriptor */
+ len += (scsi_name_len + 4);
+ }
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
+ return 0;
+}
+
+/* Extended INQUIRY Data VPD Page */
+static int
+target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
+{
+ buf[3] = 0x3c;
+ /* Set HEADSUP, ORDSUP, SIMPSUP */
+ buf[5] = 0x07;
+
+ /* If WriteCache emulation is enabled, set V_SUP */
+ if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
+ buf[6] = 0x01;
+ return 0;
+}
+
+/* Block Limits VPD page */
+static int
+target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ int have_tp = 0;
+
+ /*
+ * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
+ * emulate_tpu=1 or emulate_tpws=1 we will be expect a
+ * different page length for Thin Provisioning.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
+ have_tp = 1;
+
+ buf[0] = dev->transport->get_device_type(dev);
+ buf[3] = have_tp ? 0x3c : 0x10;
+
+ /* Set WSNZ to 1 */
+ buf[4] = 0x01;
+
+ /*
+ * Set OPTIMAL TRANSFER LENGTH GRANULARITY
+ */
+ put_unaligned_be16(1, &buf[6]);
+
+ /*
+ * Set MAXIMUM TRANSFER LENGTH
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, &buf[8]);
+
+ /*
+ * Set OPTIMAL TRANSFER LENGTH
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
+
+ /*
+ * Exit now if we don't support TP.
+ */
+ if (!have_tp)
+ return 0;
+
+ /*
+ * Set MAXIMUM UNMAP LBA COUNT
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
+
+ /*
+ * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
+ &buf[24]);
+
+ /*
+ * Set OPTIMAL UNMAP GRANULARITY
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
+
+ /*
+ * UNMAP GRANULARITY ALIGNMENT
+ */
+ put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
+ &buf[32]);
+ if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
+ buf[32] |= 0x80; /* Set the UGAVALID bit */
+
+ return 0;
+}
+
+/* Block Device Characteristics VPD page */
+static int
+target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ buf[0] = dev->transport->get_device_type(dev);
+ buf[3] = 0x3c;
+ buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
+
+ return 0;
+}
+
+/* Thin Provisioning VPD */
+static int
+target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
+ *
+ * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
+ * zero, then the page length shall be set to 0004h. If the DP bit
+ * is set to one, then the page length shall be set to the value
+ * defined in table 162.
+ */
+ buf[0] = dev->transport->get_device_type(dev);
+
+ /*
+ * Set Hardcoded length mentioned above for DP=0
+ */
+ put_unaligned_be16(0x0004, &buf[2]);
+
+ /*
+ * The THRESHOLD EXPONENT field indicates the threshold set size in
+ * LBAs as a power of 2 (i.e., the threshold set size is equal to
+ * 2(threshold exponent)).
+ *
+ * Note that this is currently set to 0x00 as mkp says it will be
+ * changing again. We can enable this once it has settled in T10
+ * and is actually used by Linux/SCSI ML code.
+ */
+ buf[4] = 0x00;
+
+ /*
+ * A TPU bit set to one indicates that the device server supports
+ * the UNMAP command (see 5.25). A TPU bit set to zero indicates
+ * that the device server does not support the UNMAP command.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
+ buf[5] = 0x80;
+
+ /*
+ * A TPWS bit set to one indicates that the device server supports
+ * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
+ * A TPWS bit set to zero indicates that the device server does not
+ * support the use of the WRITE SAME (16) command to unmap LBAs.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
+ buf[5] |= 0x40;
+
+ return 0;
+}
+
+static int
+target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
+
+static struct {
+ uint8_t page;
+ int (*emulate)(struct se_cmd *, unsigned char *);
+} evpd_handlers[] = {
+ { .page = 0x00, .emulate = target_emulate_evpd_00 },
+ { .page = 0x80, .emulate = target_emulate_evpd_80 },
+ { .page = 0x83, .emulate = target_emulate_evpd_83 },
+ { .page = 0x86, .emulate = target_emulate_evpd_86 },
+ { .page = 0xb0, .emulate = target_emulate_evpd_b0 },
+ { .page = 0xb1, .emulate = target_emulate_evpd_b1 },
+ { .page = 0xb2, .emulate = target_emulate_evpd_b2 },
+};
+
+/* supported vital product data pages */
+static int
+target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
+{
+ int p;
+
+ /*
+ * Only report the INQUIRY EVPD=1 pages after a valid NAA
+ * Registered Extended LUN WWN has been set via ConfigFS
+ * during device creation/restart.
+ */
+ if (cmd->se_dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ buf[3] = ARRAY_SIZE(evpd_handlers);
+ for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
+ buf[p + 4] = evpd_handlers[p].page;
+ }
+
+ return 0;
+}
+
+int target_emulate_inquiry(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
+ unsigned char *buf, *map_buf;
+ unsigned char *cdb = cmd->t_task_cdb;
+ int p, ret;
+
+ map_buf = transport_kmap_data_sg(cmd);
+ /*
+ * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
+ * know we actually allocated a full page. Otherwise, if the
+ * data buffer is too small, allocate a temporary buffer so we
+ * don't have to worry about overruns in all our INQUIRY
+ * emulation handling.
+ */
+ if (cmd->data_length < SE_INQUIRY_BUF &&
+ (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
+ buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
+ if (!buf) {
+ transport_kunmap_data_sg(cmd);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+ }
+ } else {
+ buf = map_buf;
+ }
+
+ if (dev == tpg->tpg_virt_lun0.lun_se_dev)
+ buf[0] = 0x3f; /* Not connected */
+ else
+ buf[0] = dev->transport->get_device_type(dev);
+
+ if (!(cdb[1] & 0x1)) {
+ if (cdb[2]) {
+ pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
+ cdb[2]);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = target_emulate_inquiry_std(cmd, buf);
+ goto out;
+ }
+
+ for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
+ if (cdb[2] == evpd_handlers[p].page) {
+ buf[1] = cdb[2];
+ ret = evpd_handlers[p].emulate(cmd, buf);
+ goto out;
+ }
+ }
+
+ pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ ret = -EINVAL;
+
+out:
+ if (buf != map_buf) {
+ memcpy(map_buf, buf, cmd->data_length);
+ kfree(buf);
+ }
+ transport_kunmap_data_sg(cmd);
+
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+int target_emulate_readcapacity(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ unsigned char *buf;
+ unsigned long long blocks_long = dev->transport->get_blocks(dev);
+ u32 blocks;
+
+ if (blocks_long >= 0x00000000ffffffff)
+ blocks = 0xffffffff;
+ else
+ blocks = (u32)blocks_long;
+
+ buf = transport_kmap_data_sg(cmd);
+
+ buf[0] = (blocks >> 24) & 0xff;
+ buf[1] = (blocks >> 16) & 0xff;
+ buf[2] = (blocks >> 8) & 0xff;
+ buf[3] = blocks & 0xff;
+ buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
+ buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
+ buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
+ buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
+
+ transport_kunmap_data_sg(cmd);
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+int target_emulate_readcapacity_16(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ unsigned char *buf;
+ unsigned long long blocks = dev->transport->get_blocks(dev);
+
+ buf = transport_kmap_data_sg(cmd);
+
+ buf[0] = (blocks >> 56) & 0xff;
+ buf[1] = (blocks >> 48) & 0xff;
+ buf[2] = (blocks >> 40) & 0xff;
+ buf[3] = (blocks >> 32) & 0xff;
+ buf[4] = (blocks >> 24) & 0xff;
+ buf[5] = (blocks >> 16) & 0xff;
+ buf[6] = (blocks >> 8) & 0xff;
+ buf[7] = blocks & 0xff;
+ buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
+ buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
+ buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
+ buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
+ /*
+ * Set Thin Provisioning Enable bit following sbc3r22 in section
+ * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
+ buf[14] = 0x80;
+
+ transport_kunmap_data_sg(cmd);
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+static int
+target_modesense_rwrecovery(unsigned char *p)
+{
+ p[0] = 0x01;
+ p[1] = 0x0a;
+
+ return 12;
+}
+
+static int
+target_modesense_control(struct se_device *dev, unsigned char *p)
+{
+ p[0] = 0x0a;
+ p[1] = 0x0a;
+ p[2] = 2;
+ /*
+ * From spc4r23, 7.4.7 Control mode page
+ *
+ * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
+ * restrictions on the algorithm used for reordering commands
+ * having the SIMPLE task attribute (see SAM-4).
+ *
+ * Table 368 -- QUEUE ALGORITHM MODIFIER field
+ * Code Description
+ * 0h Restricted reordering
+ * 1h Unrestricted reordering allowed
+ * 2h to 7h Reserved
+ * 8h to Fh Vendor specific
+ *
+ * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
+ * the device server shall order the processing sequence of commands
+ * having the SIMPLE task attribute such that data integrity is maintained
+ * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
+ * requests is halted at any time, the final value of all data observable
+ * on the medium shall be the same as if all the commands had been processed
+ * with the ORDERED task attribute).
+ *
+ * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
+ * device server may reorder the processing sequence of commands having the
+ * SIMPLE task attribute in any manner. Any data integrity exposures related to
+ * command sequence order shall be explicitly handled by the application client
+ * through the selection of appropriate ommands and task attributes.
+ */
+ p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
+ /*
+ * From spc4r17, section 7.4.6 Control mode Page
+ *
+ * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
+ *
+ * 00b: The logical unit shall clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall not establish a unit attention condition when a com-
+ * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
+ * status.
+ *
+ * 10b: The logical unit shall not clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall not establish a unit attention condition when
+ * a command is completed with BUSY, TASK SET FULL, or RESERVATION
+ * CONFLICT status.
+ *
+ * 11b a The logical unit shall not clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall establish a unit attention condition for the
+ * initiator port associated with the I_T nexus on which the BUSY,
+ * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
+ * Depending on the status, the additional sense code shall be set to
+ * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
+ * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
+ * command, a unit attention condition shall be established only once
+ * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
+ * to the number of commands completed with one of those status codes.
+ */
+ p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
+ (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
+ /*
+ * From spc4r17, section 7.4.6 Control mode Page
+ *
+ * Task Aborted Status (TAS) bit set to zero.
+ *
+ * A task aborted status (TAS) bit set to zero specifies that aborted
+ * tasks shall be terminated by the device server without any response
+ * to the application client. A TAS bit set to one specifies that tasks
+ * aborted by the actions of an I_T nexus other than the I_T nexus on
+ * which the command was received shall be completed with TASK ABORTED
+ * status (see SAM-4).
+ */
+ p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
+ p[8] = 0xff;
+ p[9] = 0xff;
+ p[11] = 30;
+
+ return 12;
+}
+
+static int
+target_modesense_caching(struct se_device *dev, unsigned char *p)
+{
+ p[0] = 0x08;
+ p[1] = 0x12;
+ if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
+ p[2] = 0x04; /* Write Cache Enable */
+ p[12] = 0x20; /* Disabled Read Ahead */
+
+ return 20;
+}
+
+static void
+target_modesense_write_protect(unsigned char *buf, int type)
+{
+ /*
+ * I believe that the WP bit (bit 7) in the mode header is the same for
+ * all device types..
+ */
+ switch (type) {
+ case TYPE_DISK:
+ case TYPE_TAPE:
+ default:
+ buf[0] |= 0x80; /* WP bit */
+ break;
+ }
+}
+
+static void
+target_modesense_dpofua(unsigned char *buf, int type)
+{
+ switch (type) {
+ case TYPE_DISK:
+ buf[0] |= 0x10; /* DPOFUA bit */
+ break;
+ default:
+ break;
+ }
+}
+
+int target_emulate_modesense(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ char *cdb = cmd->t_task_cdb;
+ unsigned char *rbuf;
+ int type = dev->transport->get_device_type(dev);
+ int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
+ int offset = ten ? 8 : 4;
+ int length = 0;
+ unsigned char buf[SE_MODE_PAGE_BUF];
+
+ memset(buf, 0, SE_MODE_PAGE_BUF);
+
+ switch (cdb[2] & 0x3f) {
+ case 0x01:
+ length = target_modesense_rwrecovery(&buf[offset]);
+ break;
+ case 0x08:
+ length = target_modesense_caching(dev, &buf[offset]);
+ break;
+ case 0x0a:
+ length = target_modesense_control(dev, &buf[offset]);
+ break;
+ case 0x3f:
+ length = target_modesense_rwrecovery(&buf[offset]);
+ length += target_modesense_caching(dev, &buf[offset+length]);
+ length += target_modesense_control(dev, &buf[offset+length]);
+ break;
+ default:
+ pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
+ cdb[2] & 0x3f, cdb[3]);
+ cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
+ return -EINVAL;
+ }
+ offset += length;
+
+ if (ten) {
+ offset -= 2;
+ buf[0] = (offset >> 8) & 0xff;
+ buf[1] = offset & 0xff;
+
+ if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+ (cmd->se_deve &&
+ (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+ target_modesense_write_protect(&buf[3], type);
+
+ if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
+ (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
+ target_modesense_dpofua(&buf[3], type);
+
+ if ((offset + 2) > cmd->data_length)
+ offset = cmd->data_length;
+
+ } else {
+ offset -= 1;
+ buf[0] = offset & 0xff;
+
+ if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+ (cmd->se_deve &&
+ (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+ target_modesense_write_protect(&buf[2], type);
+
+ if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
+ (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
+ target_modesense_dpofua(&buf[2], type);
+
+ if ((offset + 1) > cmd->data_length)
+ offset = cmd->data_length;
+ }
+
+ rbuf = transport_kmap_data_sg(cmd);
+ memcpy(rbuf, buf, offset);
+ transport_kunmap_data_sg(cmd);
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+int target_emulate_request_sense(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ unsigned char *cdb = cmd->t_task_cdb;
+ unsigned char *buf;
+ u8 ua_asc = 0, ua_ascq = 0;
+ int err = 0;
+
+ if (cdb[1] & 0x01) {
+ pr_err("REQUEST_SENSE description emulation not"
+ " supported\n");
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -ENOSYS;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+
+ if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
+ /*
+ * CURRENT ERROR, UNIT ATTENTION
+ */
+ buf[0] = 0x70;
+ buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+
+ if (cmd->data_length < 18) {
+ buf[7] = 0x00;
+ err = -EINVAL;
+ goto end;
+ }
+ /*
+ * The Additional Sense Code (ASC) from the UNIT ATTENTION
+ */
+ buf[SPC_ASC_KEY_OFFSET] = ua_asc;
+ buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
+ buf[7] = 0x0A;
+ } else {
+ /*
+ * CURRENT ERROR, NO SENSE
+ */
+ buf[0] = 0x70;
+ buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
+
+ if (cmd->data_length < 18) {
+ buf[7] = 0x00;
+ err = -EINVAL;
+ goto end;
+ }
+ /*
+ * NO ADDITIONAL SENSE INFORMATION
+ */
+ buf[SPC_ASC_KEY_OFFSET] = 0x00;
+ buf[7] = 0x0A;
+ }
+
+end:
+ transport_kunmap_data_sg(cmd);
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+/*
+ * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
+ * Note this is not used for TCM/pSCSI passthrough
+ */
+int target_emulate_unmap(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ unsigned char *buf, *ptr = NULL;
+ sector_t lba;
+ int size = cmd->data_length;
+ u32 range;
+ int ret = 0;
+ int dl, bd_dl;
+
+ if (!dev->transport->do_discard) {
+ pr_err("UNMAP emulation not supported for: %s\n",
+ dev->transport->name);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -ENOSYS;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+
+ dl = get_unaligned_be16(&buf[0]);
+ bd_dl = get_unaligned_be16(&buf[2]);
+
+ size = min(size - 8, bd_dl);
+ if (size / 16 > dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* First UNMAP block descriptor starts at 8 byte offset */
+ ptr = &buf[8];
+ pr_debug("UNMAP: Sub: %s Using dl: %u bd_dl: %u size: %u"
+ " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
+
+ while (size >= 16) {
+ lba = get_unaligned_be64(&ptr[0]);
+ range = get_unaligned_be32(&ptr[8]);
+ pr_debug("UNMAP: Using lba: %llu and range: %u\n",
+ (unsigned long long)lba, range);
+
+ if (range > dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (lba + range > dev->transport->get_blocks(dev) + 1) {
+ cmd->scsi_sense_reason = TCM_ADDRESS_OUT_OF_RANGE;
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = dev->transport->do_discard(dev, lba, range);
+ if (ret < 0) {
+ pr_err("blkdev_issue_discard() failed: %d\n",
+ ret);
+ goto err;
+ }
+
+ ptr += 16;
+ size -= 16;
+ }
+
+err:
+ transport_kunmap_data_sg(cmd);
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+/*
+ * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
+ * Note this is not used for TCM/pSCSI passthrough
+ */
+int target_emulate_write_same(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ sector_t range;
+ sector_t lba = cmd->t_task_lba;
+ u32 num_blocks;
+ int ret;
+
+ if (!dev->transport->do_discard) {
+ pr_err("WRITE_SAME emulation not supported"
+ " for: %s\n", dev->transport->name);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -ENOSYS;
+ }
+
+ if (cmd->t_task_cdb[0] == WRITE_SAME)
+ num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
+ else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
+ num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
+ else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
+ num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
+
+ /*
+ * Use the explicit range when non zero is supplied, otherwise calculate
+ * the remaining range based on ->get_blocks() - starting LBA.
+ */
+ if (num_blocks != 0)
+ range = num_blocks;
+ else
+ range = (dev->transport->get_blocks(dev) - lba) + 1;
+
+ pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
+ (unsigned long long)lba, (unsigned long long)range);
+
+ ret = dev->transport->do_discard(dev, lba, range);
+ if (ret < 0) {
+ pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
+ return ret;
+ }
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+int target_emulate_synchronize_cache(struct se_task *task)
+{
+ struct se_device *dev = task->task_se_cmd->se_dev;
+ struct se_cmd *cmd = task->task_se_cmd;
+
+ if (!dev->transport->do_sync_cache) {
+ pr_err("SYNCHRONIZE_CACHE emulation not supported"
+ " for: %s\n", dev->transport->name);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -ENOSYS;
+ }
+
+ dev->transport->do_sync_cache(task);
+ return 0;
+}
+
+int target_emulate_noop(struct se_task *task)
+{
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+/*
+ * Write a CDB into @cdb that is based on the one the intiator sent us,
+ * but updated to only cover the sectors that the current task handles.
+ */
+void target_get_task_cdb(struct se_task *task, unsigned char *cdb)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb);
+
+ memcpy(cdb, cmd->t_task_cdb, cdb_len);
+ if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
+ unsigned long long lba = task->task_lba;
+ u32 sectors = task->task_sectors;
+
+ switch (cdb_len) {
+ case 6:
+ /* 21-bit LBA and 8-bit sectors */
+ cdb[1] = (lba >> 16) & 0x1f;
+ cdb[2] = (lba >> 8) & 0xff;
+ cdb[3] = lba & 0xff;
+ cdb[4] = sectors & 0xff;
+ break;
+ case 10:
+ /* 32-bit LBA and 16-bit sectors */
+ put_unaligned_be32(lba, &cdb[2]);
+ put_unaligned_be16(sectors, &cdb[7]);
+ break;
+ case 12:
+ /* 32-bit LBA and 32-bit sectors */
+ put_unaligned_be32(lba, &cdb[2]);
+ put_unaligned_be32(sectors, &cdb[6]);
+ break;
+ case 16:
+ /* 64-bit LBA and 32-bit sectors */
+ put_unaligned_be64(lba, &cdb[2]);
+ put_unaligned_be32(sectors, &cdb[10]);
+ break;
+ case 32:
+ /* 64-bit LBA and 32-bit sectors, extended CDB */
+ put_unaligned_be64(lba, &cdb[12]);
+ put_unaligned_be32(sectors, &cdb[28]);
+ break;
+ default:
+ BUG();
+ }
+ }
+}
+EXPORT_SYMBOL(target_get_task_cdb);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_configfs.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_configfs.c
new file mode 100644
index 0000000..dbcede3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_configfs.c
@@ -0,0 +1,3284 @@
+/*******************************************************************************
+ * Filename: target_core_configfs.c
+ *
+ * This file contains ConfigFS logic for the Generic Target Engine project.
+ *
+ * Copyright (c) 2008-2011 Rising Tide Systems
+ * Copyright (c) 2008-2011 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/syscalls.h>
+#include <linux/configfs.h>
+#include <linux/spinlock.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+#include "target_core_rd.h"
+
+extern struct t10_alua_lu_gp *default_lu_gp;
+
+static LIST_HEAD(g_tf_list);
+static DEFINE_MUTEX(g_tf_lock);
+
+struct target_core_configfs_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(void *, char *);
+ ssize_t (*store)(void *, const char *, size_t);
+};
+
+static struct config_group target_core_hbagroup;
+static struct config_group alua_group;
+static struct config_group alua_lu_gps_group;
+
+static inline struct se_hba *
+item_to_hba(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct se_hba, hba_group);
+}
+
+/*
+ * Attributes for /sys/kernel/config/target/
+ */
+static ssize_t target_core_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
+ " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
+ utsname()->sysname, utsname()->machine);
+}
+
+static struct configfs_item_operations target_core_fabric_item_ops = {
+ .show_attribute = target_core_attr_show,
+};
+
+static struct configfs_attribute target_core_item_attr_version = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "version",
+ .ca_mode = S_IRUGO,
+};
+
+static struct target_fabric_configfs *target_core_get_fabric(
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!name)
+ return NULL;
+
+ mutex_lock(&g_tf_lock);
+ list_for_each_entry(tf, &g_tf_list, tf_list) {
+ if (!strcmp(tf->tf_name, name)) {
+ atomic_inc(&tf->tf_access_cnt);
+ mutex_unlock(&g_tf_lock);
+ return tf;
+ }
+ }
+ mutex_unlock(&g_tf_lock);
+
+ return NULL;
+}
+
+/*
+ * Called from struct target_core_group_ops->make_group()
+ */
+static struct config_group *target_core_register_fabric(
+ struct config_group *group,
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
+ " %s\n", group, name);
+ /*
+ * Below are some hardcoded request_module() calls to automatically
+ * local fabric modules when the following is called:
+ *
+ * mkdir -p /sys/kernel/config/target/$MODULE_NAME
+ *
+ * Note that this does not limit which TCM fabric module can be
+ * registered, but simply provids auto loading logic for modules with
+ * mkdir(2) system calls with known TCM fabric modules.
+ */
+ if (!strncmp(name, "iscsi", 5)) {
+ /*
+ * Automatically load the LIO Target fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/iscsi
+ */
+ ret = request_module("iscsi_target_mod");
+ if (ret < 0) {
+ pr_err("request_module() failed for"
+ " iscsi_target_mod.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ } else if (!strncmp(name, "loopback", 8)) {
+ /*
+ * Automatically load the tcm_loop fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/loopback
+ */
+ ret = request_module("tcm_loop");
+ if (ret < 0) {
+ pr_err("request_module() failed for"
+ " tcm_loop.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ tf = target_core_get_fabric(name);
+ if (!tf) {
+ pr_err("target_core_get_fabric() failed for %s\n",
+ name);
+ return ERR_PTR(-EINVAL);
+ }
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
+ " %s\n", tf->tf_name);
+ /*
+ * On a successful target_core_get_fabric() look, the returned
+ * struct target_fabric_configfs *tf will contain a usage reference.
+ */
+ pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
+ &TF_CIT_TMPL(tf)->tfc_wwn_cit);
+
+ tf->tf_group.default_groups = tf->tf_default_groups;
+ tf->tf_group.default_groups[0] = &tf->tf_disc_group;
+ tf->tf_group.default_groups[1] = NULL;
+
+ config_group_init_type_name(&tf->tf_group, name,
+ &TF_CIT_TMPL(tf)->tfc_wwn_cit);
+ config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
+ &TF_CIT_TMPL(tf)->tfc_discovery_cit);
+
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
+ " %s\n", tf->tf_group.cg_item.ci_name);
+ /*
+ * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
+ */
+ tf->tf_ops.tf_subsys = tf->tf_subsys;
+ tf->tf_fabric = &tf->tf_group.cg_item;
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
+ " for %s\n", name);
+
+ return &tf->tf_group;
+}
+
+/*
+ * Called from struct target_core_group_ops->drop_item()
+ */
+static void target_core_deregister_fabric(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct target_fabric_configfs *tf = container_of(
+ to_config_group(item), struct target_fabric_configfs, tf_group);
+ struct config_group *tf_group;
+ struct config_item *df_item;
+ int i;
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
+ " tf list\n", config_item_name(item));
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
+ " %s\n", tf->tf_name);
+ atomic_dec(&tf->tf_access_cnt);
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
+ " tf->tf_fabric for %s\n", tf->tf_name);
+ tf->tf_fabric = NULL;
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
+ " %s\n", config_item_name(item));
+
+ tf_group = &tf->tf_group;
+ for (i = 0; tf_group->default_groups[i]; i++) {
+ df_item = &tf_group->default_groups[i]->cg_item;
+ tf_group->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_fabric_group_ops = {
+ .make_group = &target_core_register_fabric,
+ .drop_item = &target_core_deregister_fabric,
+};
+
+/*
+ * All item attributes appearing in /sys/kernel/target/ appear here.
+ */
+static struct configfs_attribute *target_core_fabric_item_attrs[] = {
+ &target_core_item_attr_version,
+ NULL,
+};
+
+/*
+ * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
+ */
+static struct config_item_type target_core_fabrics_item = {
+ .ct_item_ops = &target_core_fabric_item_ops,
+ .ct_group_ops = &target_core_fabric_group_ops,
+ .ct_attrs = target_core_fabric_item_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct configfs_subsystem target_core_fabrics = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "target",
+ .ci_type = &target_core_fabrics_item,
+ },
+ },
+};
+
+static struct configfs_subsystem *target_core_subsystem[] = {
+ &target_core_fabrics,
+ NULL,
+};
+
+/*##############################################################################
+// Start functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/*
+ * First function called by fabric modules to:
+ *
+ * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
+ * 2) Add struct target_fabric_configfs to g_tf_list
+ * 3) Return struct target_fabric_configfs to fabric module to be passed
+ * into target_fabric_configfs_register().
+ */
+struct target_fabric_configfs *target_fabric_configfs_init(
+ struct module *fabric_mod,
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!(name)) {
+ pr_err("Unable to locate passed fabric name\n");
+ return ERR_PTR(-EINVAL);
+ }
+ if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
+ pr_err("Passed name: %s exceeds TARGET_FABRIC"
+ "_NAME_SIZE\n", name);
+ return ERR_PTR(-EINVAL);
+ }
+
+ tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
+ if (!tf)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&tf->tf_list);
+ atomic_set(&tf->tf_access_cnt, 0);
+ /*
+ * Setup the default generic struct config_item_type's (cits) in
+ * struct target_fabric_configfs->tf_cit_tmpl
+ */
+ tf->tf_module = fabric_mod;
+ target_fabric_setup_cits(tf);
+
+ tf->tf_subsys = target_core_subsystem[0];
+ snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
+
+ mutex_lock(&g_tf_lock);
+ list_add_tail(&tf->tf_list, &g_tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
+ ">>>>>>>>>>>>>>\n");
+ pr_debug("Initialized struct target_fabric_configfs: %p for"
+ " %s\n", tf, tf->tf_name);
+ return tf;
+}
+EXPORT_SYMBOL(target_fabric_configfs_init);
+
+/*
+ * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
+ */
+void target_fabric_configfs_free(
+ struct target_fabric_configfs *tf)
+{
+ mutex_lock(&g_tf_lock);
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ kfree(tf);
+}
+EXPORT_SYMBOL(target_fabric_configfs_free);
+
+/*
+ * Perform a sanity check of the passed tf->tf_ops before completing
+ * TCM fabric module registration.
+ */
+static int target_fabric_tf_ops_check(
+ struct target_fabric_configfs *tf)
+{
+ struct target_core_fabric_ops *tfo = &tf->tf_ops;
+
+ if (!tfo->get_fabric_name) {
+ pr_err("Missing tfo->get_fabric_name()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_fabric_proto_ident) {
+ pr_err("Missing tfo->get_fabric_proto_ident()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_wwn) {
+ pr_err("Missing tfo->tpg_get_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_tag) {
+ pr_err("Missing tfo->tpg_get_tag()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_default_depth) {
+ pr_err("Missing tfo->tpg_get_default_depth()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_pr_transport_id) {
+ pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_pr_transport_id_len) {
+ pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode) {
+ pr_err("Missing tfo->tpg_check_demo_mode()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode_cache) {
+ pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode_write_protect) {
+ pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_prod_mode_write_protect) {
+ pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_alloc_fabric_acl) {
+ pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_release_fabric_acl) {
+ pr_err("Missing tfo->tpg_release_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_inst_index) {
+ pr_err("Missing tfo->tpg_get_inst_index()\n");
+ return -EINVAL;
+ }
+ if (!tfo->release_cmd) {
+ pr_err("Missing tfo->release_cmd()\n");
+ return -EINVAL;
+ }
+ if (!tfo->shutdown_session) {
+ pr_err("Missing tfo->shutdown_session()\n");
+ return -EINVAL;
+ }
+ if (!tfo->close_session) {
+ pr_err("Missing tfo->close_session()\n");
+ return -EINVAL;
+ }
+ if (!tfo->sess_get_index) {
+ pr_err("Missing tfo->sess_get_index()\n");
+ return -EINVAL;
+ }
+ if (!tfo->write_pending) {
+ pr_err("Missing tfo->write_pending()\n");
+ return -EINVAL;
+ }
+ if (!tfo->write_pending_status) {
+ pr_err("Missing tfo->write_pending_status()\n");
+ return -EINVAL;
+ }
+ if (!tfo->set_default_node_attributes) {
+ pr_err("Missing tfo->set_default_node_attributes()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_task_tag) {
+ pr_err("Missing tfo->get_task_tag()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_cmd_state) {
+ pr_err("Missing tfo->get_cmd_state()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_data_in) {
+ pr_err("Missing tfo->queue_data_in()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_status) {
+ pr_err("Missing tfo->queue_status()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_tm_rsp) {
+ pr_err("Missing tfo->queue_tm_rsp()\n");
+ return -EINVAL;
+ }
+ if (!tfo->set_fabric_sense_len) {
+ pr_err("Missing tfo->set_fabric_sense_len()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_fabric_sense_len) {
+ pr_err("Missing tfo->get_fabric_sense_len()\n");
+ return -EINVAL;
+ }
+ /*
+ * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
+ * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
+ * target_core_fabric_configfs.c WWN+TPG group context code.
+ */
+ if (!tfo->fabric_make_wwn) {
+ pr_err("Missing tfo->fabric_make_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_drop_wwn) {
+ pr_err("Missing tfo->fabric_drop_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_make_tpg) {
+ pr_err("Missing tfo->fabric_make_tpg()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_drop_tpg) {
+ pr_err("Missing tfo->fabric_drop_tpg()\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Called 2nd from fabric module with returned parameter of
+ * struct target_fabric_configfs * from target_fabric_configfs_init().
+ *
+ * Upon a successful registration, the new fabric's struct config_item is
+ * return. Also, a pointer to this struct is set in the passed
+ * struct target_fabric_configfs.
+ */
+int target_fabric_configfs_register(
+ struct target_fabric_configfs *tf)
+{
+ int ret;
+
+ if (!tf) {
+ pr_err("Unable to locate target_fabric_configfs"
+ " pointer\n");
+ return -EINVAL;
+ }
+ if (!tf->tf_subsys) {
+ pr_err("Unable to target struct config_subsystem"
+ " pointer\n");
+ return -EINVAL;
+ }
+ ret = target_fabric_tf_ops_check(tf);
+ if (ret < 0)
+ return ret;
+
+ pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
+ ">>>>>>>>>>\n");
+ return 0;
+}
+EXPORT_SYMBOL(target_fabric_configfs_register);
+
+void target_fabric_configfs_deregister(
+ struct target_fabric_configfs *tf)
+{
+ struct configfs_subsystem *su;
+
+ if (!tf) {
+ pr_err("Unable to locate passed target_fabric_"
+ "configfs\n");
+ return;
+ }
+ su = tf->tf_subsys;
+ if (!su) {
+ pr_err("Unable to locate passed tf->tf_subsys"
+ " pointer\n");
+ return;
+ }
+ pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
+ ">>>>>>>>>>>>\n");
+ mutex_lock(&g_tf_lock);
+ if (atomic_read(&tf->tf_access_cnt)) {
+ mutex_unlock(&g_tf_lock);
+ pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
+ tf->tf_name);
+ BUG();
+ }
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
+ " %s\n", tf->tf_name);
+ tf->tf_module = NULL;
+ tf->tf_subsys = NULL;
+ kfree(tf);
+
+ pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
+ ">>>>>\n");
+}
+EXPORT_SYMBOL(target_fabric_configfs_deregister);
+
+/*##############################################################################
+// Stop functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/* Start functions for struct config_item_type target_core_dev_attrib_cit */
+
+#define DEF_DEV_ATTRIB_SHOW(_name) \
+static ssize_t target_core_dev_show_attr_##_name( \
+ struct se_dev_attrib *da, \
+ char *page) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ ssize_t rb; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!dev) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ rb = snprintf(page, PAGE_SIZE, "%u\n", \
+ (u32)dev->se_sub_dev->se_dev_attrib._name); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return rb; \
+}
+
+#define DEF_DEV_ATTRIB_STORE(_name) \
+static ssize_t target_core_dev_store_attr_##_name( \
+ struct se_dev_attrib *da, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ unsigned long val; \
+ int ret; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!dev) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ ret = strict_strtoul(page, 0, &val); \
+ if (ret < 0) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ pr_err("strict_strtoul() failed with" \
+ " ret: %d\n", ret); \
+ return -EINVAL; \
+ } \
+ ret = se_dev_set_##_name(dev, (u32)val); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return (!ret) ? count : -EINVAL; \
+}
+
+#define DEF_DEV_ATTRIB(_name) \
+DEF_DEV_ATTRIB_SHOW(_name); \
+DEF_DEV_ATTRIB_STORE(_name);
+
+#define DEF_DEV_ATTRIB_RO(_name) \
+DEF_DEV_ATTRIB_SHOW(_name);
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
+#define SE_DEV_ATTR(_name, _mode) \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_show_attr_##_name, \
+ target_core_dev_store_attr_##_name);
+
+#define SE_DEV_ATTR_RO(_name); \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_show_attr_##_name);
+
+DEF_DEV_ATTRIB(emulate_dpo);
+SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_write);
+SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_read);
+SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_write_cache);
+SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
+SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tas);
+SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tpu);
+SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tpws);
+SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(enforce_pr_isids);
+SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(is_nonrot);
+SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_rest_reord);
+SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_block_size);
+SE_DEV_ATTR_RO(hw_block_size);
+
+DEF_DEV_ATTRIB(block_size);
+SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_max_sectors);
+SE_DEV_ATTR_RO(hw_max_sectors);
+
+DEF_DEV_ATTRIB(max_sectors);
+SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(fabric_max_sectors);
+SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(optimal_sectors);
+SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_queue_depth);
+SE_DEV_ATTR_RO(hw_queue_depth);
+
+DEF_DEV_ATTRIB(queue_depth);
+SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(max_unmap_lba_count);
+SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(max_unmap_block_desc_count);
+SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(unmap_granularity);
+SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(unmap_granularity_alignment);
+SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
+
+static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
+ &target_core_dev_attrib_emulate_dpo.attr,
+ &target_core_dev_attrib_emulate_fua_write.attr,
+ &target_core_dev_attrib_emulate_fua_read.attr,
+ &target_core_dev_attrib_emulate_write_cache.attr,
+ &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &target_core_dev_attrib_emulate_tas.attr,
+ &target_core_dev_attrib_emulate_tpu.attr,
+ &target_core_dev_attrib_emulate_tpws.attr,
+ &target_core_dev_attrib_enforce_pr_isids.attr,
+ &target_core_dev_attrib_is_nonrot.attr,
+ &target_core_dev_attrib_emulate_rest_reord.attr,
+ &target_core_dev_attrib_hw_block_size.attr,
+ &target_core_dev_attrib_block_size.attr,
+ &target_core_dev_attrib_hw_max_sectors.attr,
+ &target_core_dev_attrib_max_sectors.attr,
+ &target_core_dev_attrib_fabric_max_sectors.attr,
+ &target_core_dev_attrib_optimal_sectors.attr,
+ &target_core_dev_attrib_hw_queue_depth.attr,
+ &target_core_dev_attrib_queue_depth.attr,
+ &target_core_dev_attrib_max_unmap_lba_count.attr,
+ &target_core_dev_attrib_max_unmap_block_desc_count.attr,
+ &target_core_dev_attrib_unmap_granularity.attr,
+ &target_core_dev_attrib_unmap_granularity_alignment.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_attrib_ops = {
+ .show_attribute = target_core_dev_attrib_attr_show,
+ .store_attribute = target_core_dev_attrib_attr_store,
+};
+
+static struct config_item_type target_core_dev_attrib_cit = {
+ .ct_item_ops = &target_core_dev_attrib_ops,
+ .ct_attrs = target_core_dev_attrib_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_attrib_cit */
+
+/* Start functions for struct config_item_type target_core_dev_wwn_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
+#define SE_DEV_WWN_ATTR(_name, _mode) \
+static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_wwn_show_attr_##_name, \
+ target_core_dev_wwn_store_attr_##_name);
+
+#define SE_DEV_WWN_ATTR_RO(_name); \
+do { \
+ static struct target_core_dev_wwn_attribute \
+ target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_wwn_show_attr_##_name); \
+} while (0);
+
+/*
+ * VPD page 0x80 Unit serial
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+
+ dev = se_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
+ &t10_wwn->unit_serial[0]);
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+ unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
+
+ /*
+ * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
+ * from the struct scsi_device level firmware, do not allow
+ * VPD Unit Serial to be emulated.
+ *
+ * Note this struct scsi_device could also be emulating VPD
+ * information from its drivers/scsi LLD. But for now we assume
+ * it is doing 'the right thing' wrt a world wide unique
+ * VPD Unit Serial Number that OS dependent multipath can depend on.
+ */
+ if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
+ pr_err("Underlying SCSI device firmware provided VPD"
+ " Unit Serial, ignoring request\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
+ pr_err("Emulated VPD Unit Serial exceeds"
+ " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
+ return -EOVERFLOW;
+ }
+ /*
+ * Check to see if any active $FABRIC_MOD exports exist. If they
+ * do exist, fail here as changing this information on the fly
+ * (underneath the initiator side OS dependent multipath code)
+ * could cause negative effects.
+ */
+ dev = su_dev->se_dev_ptr;
+ if (dev) {
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("Unable to set VPD Unit Serial while"
+ " active %d $FABRIC_MOD exports exist\n",
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ }
+ /*
+ * This currently assumes ASCII encoding for emulated VPD Unit Serial.
+ *
+ * Also, strip any newline added from the userspace
+ * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
+ */
+ memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
+ snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
+ snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
+ "%s", strstrip(buf));
+ su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
+
+ pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
+ " %s\n", su_dev->t10_wwn.unit_serial);
+
+ return count;
+}
+
+SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Protocol Identifier
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+ struct t10_vpd *vpd;
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ ssize_t len = 0;
+
+ dev = se_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+ spin_lock(&t10_wwn->t10_vpd_lock);
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
+ if (!vpd->protocol_identifier_set)
+ continue;
+
+ transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
+
+ if (len + strlen(buf) >= PAGE_SIZE)
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ }
+ spin_unlock(&t10_wwn->t10_vpd_lock);
+
+ return len;
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
+
+/*
+ * Generic wrapper for dumping VPD identifiers by association.
+ */
+#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
+static ssize_t target_core_dev_wwn_show_attr_##_name( \
+ struct t10_wwn *t10_wwn, \
+ char *page) \
+{ \
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
+ struct se_device *dev; \
+ struct t10_vpd *vpd; \
+ unsigned char buf[VPD_TMP_BUF_SIZE]; \
+ ssize_t len = 0; \
+ \
+ dev = se_dev->se_dev_ptr; \
+ if (!dev) \
+ return -ENODEV; \
+ \
+ spin_lock(&t10_wwn->t10_vpd_lock); \
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
+ if (vpd->association != _assoc) \
+ continue; \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ } \
+ spin_unlock(&t10_wwn->t10_vpd_lock); \
+ \
+ return len; \
+}
+
+/*
+ * VPD page 0x83 Association: Logical Unit
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: Target Port
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: SCSI Target Device
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
+
+static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
+ &target_core_dev_wwn_vpd_unit_serial.attr,
+ &target_core_dev_wwn_vpd_protocol_identifier.attr,
+ &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
+ &target_core_dev_wwn_vpd_assoc_target_port.attr,
+ &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_wwn_ops = {
+ .show_attribute = target_core_dev_wwn_attr_show,
+ .store_attribute = target_core_dev_wwn_attr_store,
+};
+
+static struct config_item_type target_core_dev_wwn_cit = {
+ .ct_item_ops = &target_core_dev_wwn_ops,
+ .ct_attrs = target_core_dev_wwn_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_wwn_cit */
+
+/* Start functions for struct config_item_type target_core_dev_pr_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
+#define SE_DEV_PR_ATTR(_name, _mode) \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_pr_show_attr_##_name, \
+ target_core_dev_pr_store_attr_##_name);
+
+#define SE_DEV_PR_ATTR_RO(_name); \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_pr_show_attr_##_name);
+
+/*
+ * res_holder
+ */
+static ssize_t target_core_dev_pr_show_spc3_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+ struct t10_pr_registration *pr_reg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg) {
+ *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
+ se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_spc2_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+
+ spin_lock(&dev->dev_reservation_lock);
+ se_nacl = dev->dev_reserved_node_acl;
+ if (!se_nacl) {
+ *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
+ se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_attr_res_holder(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ switch (su_dev->t10_pr.res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC2_RESERVATIONS:
+ target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC_PASSTHROUGH:
+ len += sprintf(page+len, "Passthrough\n");
+ break;
+ default:
+ len += sprintf(page+len, "Unknown\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_holder);
+
+/*
+ * res_pr_all_tgt_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ /*
+ * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
+ * Basic PERSISTENT RESERVER OUT parameter list, page 290
+ */
+ if (pr_reg->pr_reg_all_tg_pt)
+ len = sprintf(page, "SPC-3 Reservation: All Target"
+ " Ports registration\n");
+ else
+ len = sprintf(page, "SPC-3 Reservation: Single"
+ " Target Port registration\n");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
+
+/*
+ * res_pr_generation
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_generation);
+
+/*
+ * res_pr_holder_tg_port
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_node_acl *se_nacl;
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg;
+ struct target_core_fabric_ops *tfo;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = se_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ tfo = se_tpg->se_tpg_tfo;
+
+ len += sprintf(page+len, "SPC-3 Reservation: %s"
+ " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
+ tfo->tpg_get_wwn(se_tpg));
+ len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
+ " Identifer Tag: %hu %s Portal Group Tag: %hu"
+ " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
+ tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
+ tfo->get_fabric_name(), lun->unpacked_lun);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
+
+/*
+ * res_pr_registered_i_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct target_core_fabric_ops *tfo;
+ struct t10_pr_registration *pr_reg;
+ unsigned char buf[384];
+ char i_buf[PR_REG_ISID_ID_LEN];
+ ssize_t len = 0;
+ int reg_count = 0, prf_isid;
+
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ len += sprintf(page+len, "SPC-3 PR Registrations:\n");
+
+ spin_lock(&su_dev->t10_pr.registration_lock);
+ list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+ pr_reg_list) {
+
+ memset(buf, 0, 384);
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
+ tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
+ &i_buf[0] : "", pr_reg->pr_res_key,
+ pr_reg->pr_res_generation);
+
+ if (len + strlen(buf) >= PAGE_SIZE)
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ reg_count++;
+ }
+ spin_unlock(&su_dev->t10_pr.registration_lock);
+
+ if (!reg_count)
+ len += sprintf(page+len, "None\n");
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
+
+/*
+ * res_pr_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ len = sprintf(page, "SPC-3 Reservation Type: %s\n",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type));
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_type);
+
+/*
+ * res_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ switch (su_dev->t10_pr.res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
+ break;
+ case SPC2_RESERVATIONS:
+ len = sprintf(page, "SPC2_RESERVATIONS\n");
+ break;
+ case SPC_PASSTHROUGH:
+ len = sprintf(page, "SPC_PASSTHROUGH\n");
+ break;
+ default:
+ len = sprintf(page, "UNKNOWN\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_type);
+
+/*
+ * res_aptpl_active
+ */
+
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "APTPL Bit Status: %s\n",
+ (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
+}
+
+SE_DEV_PR_ATTR_RO(res_aptpl_active);
+
+/*
+ * res_aptpl_metadata
+ */
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!su_dev->se_dev_ptr)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "Ready to process PR APTPL metadata..\n");
+}
+
+enum {
+ Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
+ Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
+ Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
+ Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_initiator_fabric, "initiator_fabric=%s"},
+ {Opt_initiator_node, "initiator_node=%s"},
+ {Opt_initiator_sid, "initiator_sid=%s"},
+ {Opt_sa_res_key, "sa_res_key=%s"},
+ {Opt_res_holder, "res_holder=%d"},
+ {Opt_res_type, "res_type=%d"},
+ {Opt_res_scope, "res_scope=%d"},
+ {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
+ {Opt_mapped_lun, "mapped_lun=%d"},
+ {Opt_target_fabric, "target_fabric=%s"},
+ {Opt_target_node, "target_node=%s"},
+ {Opt_tpgt, "tpgt=%d"},
+ {Opt_port_rtpi, "port_rtpi=%d"},
+ {Opt_target_lun, "target_lun=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
+ struct se_subsystem_dev *su_dev,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev;
+ unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
+ unsigned char *t_fabric = NULL, *t_port = NULL;
+ char *orig, *ptr, *arg_p, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ unsigned long long tmp_ll;
+ u64 sa_res_key = 0;
+ u32 mapped_lun = 0, target_lun = 0;
+ int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
+ u16 port_rpti = 0, tpgt = 0;
+ u8 type = 0, scope;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_debug("Unable to process APTPL metadata while"
+ " active fabric exports exist\n");
+ return -EINVAL;
+ }
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_initiator_fabric:
+ i_fabric = match_strdup(&args[0]);
+ if (!i_fabric) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_initiator_node:
+ i_port = match_strdup(&args[0]);
+ if (!i_port) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
+ pr_err("APTPL metadata initiator_node="
+ " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
+ PR_APTPL_MAX_IPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_initiator_sid:
+ isid = match_strdup(&args[0]);
+ if (!isid) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(isid) >= PR_REG_ISID_LEN) {
+ pr_err("APTPL metadata initiator_isid"
+ "= exceeds PR_REG_ISID_LEN: %d\n",
+ PR_REG_ISID_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_sa_res_key:
+ arg_p = match_strdup(&args[0]);
+ if (!arg_p) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ ret = strict_strtoull(arg_p, 0, &tmp_ll);
+ if (ret < 0) {
+ pr_err("strict_strtoull() failed for"
+ " sa_res_key=\n");
+ goto out;
+ }
+ sa_res_key = (u64)tmp_ll;
+ break;
+ /*
+ * PR APTPL Metadata for Reservation
+ */
+ case Opt_res_holder:
+ match_int(args, &arg);
+ res_holder = arg;
+ break;
+ case Opt_res_type:
+ match_int(args, &arg);
+ type = (u8)arg;
+ break;
+ case Opt_res_scope:
+ match_int(args, &arg);
+ scope = (u8)arg;
+ break;
+ case Opt_res_all_tg_pt:
+ match_int(args, &arg);
+ all_tg_pt = (int)arg;
+ break;
+ case Opt_mapped_lun:
+ match_int(args, &arg);
+ mapped_lun = (u32)arg;
+ break;
+ /*
+ * PR APTPL Metadata for Target Port
+ */
+ case Opt_target_fabric:
+ t_fabric = match_strdup(&args[0]);
+ if (!t_fabric) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_target_node:
+ t_port = match_strdup(&args[0]);
+ if (!t_port) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
+ pr_err("APTPL metadata target_node="
+ " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
+ PR_APTPL_MAX_TPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_tpgt:
+ match_int(args, &arg);
+ tpgt = (u16)arg;
+ break;
+ case Opt_port_rtpi:
+ match_int(args, &arg);
+ port_rpti = (u16)arg;
+ break;
+ case Opt_target_lun:
+ match_int(args, &arg);
+ target_lun = (u32)arg;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (!i_port || !t_port || !sa_res_key) {
+ pr_err("Illegal parameters for APTPL registration\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (res_holder && !(type)) {
+ pr_err("Illegal PR type: 0x%02x for reservation"
+ " holder\n", type);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
+ i_port, isid, mapped_lun, t_port, tpgt, target_lun,
+ res_holder, all_tg_pt, type);
+out:
+ kfree(i_fabric);
+ kfree(i_port);
+ kfree(isid);
+ kfree(t_fabric);
+ kfree(t_port);
+ kfree(orig);
+ return (ret == 0) ? count : ret;
+}
+
+SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
+
+static struct configfs_attribute *target_core_dev_pr_attrs[] = {
+ &target_core_dev_pr_res_holder.attr,
+ &target_core_dev_pr_res_pr_all_tgt_pts.attr,
+ &target_core_dev_pr_res_pr_generation.attr,
+ &target_core_dev_pr_res_pr_holder_tg_port.attr,
+ &target_core_dev_pr_res_pr_registered_i_pts.attr,
+ &target_core_dev_pr_res_pr_type.attr,
+ &target_core_dev_pr_res_type.attr,
+ &target_core_dev_pr_res_aptpl_active.attr,
+ &target_core_dev_pr_res_aptpl_metadata.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_pr_ops = {
+ .show_attribute = target_core_dev_pr_attr_show,
+ .store_attribute = target_core_dev_pr_attr_store,
+};
+
+static struct config_item_type target_core_dev_pr_cit = {
+ .ct_item_ops = &target_core_dev_pr_ops,
+ .ct_attrs = target_core_dev_pr_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_pr_cit */
+
+/* Start functions for struct config_item_type target_core_dev_cit */
+
+static ssize_t target_core_show_dev_info(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ int bl = 0;
+ ssize_t read_bytes = 0;
+
+ if (!se_dev->se_dev_ptr)
+ return -ENODEV;
+
+ transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
+ read_bytes += bl;
+ read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_info = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "info",
+ .ca_mode = S_IRUGO },
+ .show = target_core_show_dev_info,
+ .store = NULL,
+};
+
+static ssize_t target_core_store_dev_control(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+
+ if (!se_dev->se_dev_su_ptr) {
+ pr_err("Unable to locate struct se_subsystem_dev>se"
+ "_dev_su_ptr\n");
+ return -EINVAL;
+ }
+
+ return t->set_configfs_dev_params(hba, se_dev, page, count);
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_control = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "control",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_control,
+};
+
+static ssize_t target_core_show_dev_alias(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
+}
+
+static ssize_t target_core_store_dev_alias(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_DEV_ALIAS_LEN-1)) {
+ pr_err("alias count: %d exceeds"
+ " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
+ SE_DEV_ALIAS_LEN-1);
+ return -EINVAL;
+ }
+
+ read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
+ "%s", page);
+ if (!read_bytes)
+ return -EINVAL;
+ if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
+ se_dev->se_dev_alias[read_bytes - 1] = '\0';
+
+ se_dev->su_dev_flags |= SDF_USING_ALIAS;
+
+ pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_dev_alias);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alias = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alias",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_alias,
+ .store = target_core_store_dev_alias,
+};
+
+static ssize_t target_core_show_dev_udev_path(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
+}
+
+static ssize_t target_core_store_dev_udev_path(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_UDEV_PATH_LEN-1)) {
+ pr_err("udev_path count: %d exceeds"
+ " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
+ SE_UDEV_PATH_LEN-1);
+ return -EINVAL;
+ }
+
+ read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
+ "%s", page);
+ if (!read_bytes)
+ return -EINVAL;
+ if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
+ se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
+
+ se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
+
+ pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_dev_udev_path);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "udev_path",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_udev_path,
+ .store = target_core_store_dev_udev_path,
+};
+
+static ssize_t target_core_store_dev_enable(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = p;
+ struct se_device *dev;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ char *ptr;
+
+ ptr = strstr(page, "1");
+ if (!ptr) {
+ pr_err("For dev_enable ops, only valid value"
+ " is \"1\"\n");
+ return -EINVAL;
+ }
+ if (se_dev->se_dev_ptr) {
+ pr_err("se_dev->se_dev_ptr already set for storage"
+ " object\n");
+ return -EEXIST;
+ }
+
+ if (t->check_configfs_dev_params(hba, se_dev) < 0)
+ return -EINVAL;
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (IS_ERR(dev))
+ return PTR_ERR(dev);
+ else if (!dev)
+ return -EINVAL;
+
+ se_dev->se_dev_ptr = dev;
+ pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
+ " %p\n", se_dev->se_dev_ptr);
+
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_enable = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "enable",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_enable,
+};
+
+static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
+{
+ struct se_device *dev;
+ struct se_subsystem_dev *su_dev = p;
+ struct config_item *lu_ci;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
+ return len;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem) {
+ pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (lu_gp) {
+ lu_ci = &lu_gp->lu_gp_group.cg_item;
+ len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
+ config_item_name(lu_ci), lu_gp->lu_gp_id);
+ }
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return len;
+}
+
+static ssize_t target_core_store_alua_lu_gp(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev;
+ struct se_subsystem_dev *su_dev = p;
+ struct se_hba *hba = su_dev->se_dev_hba;
+ struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+ int move = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!dev)
+ return -ENODEV;
+
+ if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
+ pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ return -EINVAL;
+ }
+ if (count > LU_GROUP_NAME_BUF) {
+ pr_err("ALUA LU Group Alias too large!\n");
+ return -EINVAL;
+ }
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+ memcpy(buf, page, count);
+ /*
+ * Any ALUA logical unit alias besides "NULL" means we will be
+ * making a new group association.
+ */
+ if (strcmp(strstrip(buf), "NULL")) {
+ /*
+ * core_alua_get_lu_gp_by_name() will increment reference to
+ * struct t10_alua_lu_gp. This reference is released with
+ * core_alua_get_lu_gp_by_name below().
+ */
+ lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
+ if (!lu_gp_new)
+ return -ENODEV;
+ }
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem) {
+ if (lu_gp_new)
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (lu_gp) {
+ /*
+ * Clearing an existing lu_gp association, and replacing
+ * with NULL
+ */
+ if (!lu_gp_new) {
+ pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
+ " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
+ " %hu\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item),
+ config_item_name(&lu_gp->lu_gp_group.cg_item),
+ lu_gp->lu_gp_id);
+
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return count;
+ }
+ /*
+ * Removing existing association of lu_gp_mem with lu_gp
+ */
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ move = 1;
+ }
+ /*
+ * Associate lu_gp_mem with lu_gp_new.
+ */
+ __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
+ " core/alua/lu_gps/%s, ID: %hu\n",
+ (move) ? "Moving" : "Adding",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item),
+ config_item_name(&lu_gp_new->lu_gp_group.cg_item),
+ lu_gp_new->lu_gp_id);
+
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alua_lu_gp",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_alua_lu_gp,
+ .store = target_core_store_alua_lu_gp,
+};
+
+static struct configfs_attribute *lio_core_dev_attrs[] = {
+ &target_core_attr_dev_info.attr,
+ &target_core_attr_dev_control.attr,
+ &target_core_attr_dev_alias.attr,
+ &target_core_attr_dev_udev_path.attr,
+ &target_core_attr_dev_enable.attr,
+ &target_core_attr_dev_alua_lu_gp.attr,
+ NULL,
+};
+
+static void target_core_dev_release(struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
+ struct se_subsystem_api *t = hba->transport;
+ struct config_group *dev_cg = &se_dev->se_dev_group;
+
+ kfree(dev_cg->default_groups);
+ /*
+ * This pointer will set when the storage is enabled with:
+ *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
+ */
+ if (se_dev->se_dev_ptr) {
+ pr_debug("Target_Core_ConfigFS: Calling se_free_"
+ "virtual_device() for se_dev_ptr: %p\n",
+ se_dev->se_dev_ptr);
+
+ se_free_virtual_device(se_dev->se_dev_ptr, hba);
+ } else {
+ /*
+ * Release struct se_subsystem_dev->se_dev_su_ptr..
+ */
+ pr_debug("Target_Core_ConfigFS: Calling t->free_"
+ "device() for se_dev_su_ptr: %p\n",
+ se_dev->se_dev_su_ptr);
+
+ t->free_device(se_dev->se_dev_su_ptr);
+ }
+
+ pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
+ "_dev_t: %p\n", se_dev);
+ kfree(se_dev);
+}
+
+static ssize_t target_core_dev_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!tc_attr->show)
+ return -EINVAL;
+
+ return tc_attr->show(se_dev, page);
+}
+
+static ssize_t target_core_dev_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!tc_attr->store)
+ return -EINVAL;
+
+ return tc_attr->store(se_dev, page, count);
+}
+
+static struct configfs_item_operations target_core_dev_item_ops = {
+ .release = target_core_dev_release,
+ .show_attribute = target_core_dev_show,
+ .store_attribute = target_core_dev_store,
+};
+
+static struct config_item_type target_core_dev_cit = {
+ .ct_item_ops = &target_core_dev_item_ops,
+ .ct_attrs = lio_core_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
+#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_lu_gp_show_attr_##_name, \
+ target_core_alua_lu_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_lu_gp_show_attr_##_name);
+
+/*
+ * lu_gp_id
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ if (!lu_gp->lu_gp_valid_id)
+ return 0;
+
+ return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
+}
+
+static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ unsigned long lu_gp_id;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &lu_gp_id);
+ if (ret < 0) {
+ pr_err("strict_strtoul() returned %d for"
+ " lu_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (lu_gp_id > 0x0000ffff) {
+ pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", lu_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s to ID: %hu\n",
+ config_item_name(&alua_lu_gp_cg->cg_item),
+ lu_gp->lu_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_members(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_hba *hba;
+ struct se_subsystem_dev *su_dev;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
+ dev = lu_gp_mem->lu_gp_mem_dev;
+ su_dev = dev->se_sub_dev;
+ hba = su_dev->se_dev_hba;
+
+ cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ pr_warn("Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_LU_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
+
+static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
+ &target_core_alua_lu_gp_lu_gp_id.attr,
+ &target_core_alua_lu_gp_members.attr,
+ NULL,
+};
+
+static void target_core_alua_lu_gp_release(struct config_item *item)
+{
+ struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
+ struct t10_alua_lu_gp, lu_gp_group);
+
+ core_alua_free_lu_gp(lu_gp);
+}
+
+static struct configfs_item_operations target_core_alua_lu_gp_ops = {
+ .release = target_core_alua_lu_gp_release,
+ .show_attribute = target_core_alua_lu_gp_attr_show,
+ .store_attribute = target_core_alua_lu_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_lu_gp_cit = {
+ .ct_item_ops = &target_core_alua_lu_gp_ops,
+ .ct_attrs = target_core_alua_lu_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+static struct config_group *target_core_alua_create_lu_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_lu_gp *lu_gp;
+ struct config_group *alua_lu_gp_cg = NULL;
+ struct config_item *alua_lu_gp_ci = NULL;
+
+ lu_gp = core_alua_allocate_lu_gp(name, 0);
+ if (IS_ERR(lu_gp))
+ return NULL;
+
+ alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_lu_gp_cg, name,
+ &target_core_alua_lu_gp_cit);
+
+ pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s\n",
+ config_item_name(alua_lu_gp_ci));
+
+ return alua_lu_gp_cg;
+
+}
+
+static void target_core_alua_drop_lu_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
+ struct t10_alua_lu_gp, lu_gp_group);
+
+ pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s, ID: %hu\n",
+ config_item_name(item), lu_gp->lu_gp_id);
+ /*
+ * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
+ * -> target_core_alua_lu_gp_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
+ .make_group = &target_core_alua_create_lu_gp,
+ .drop_item = &target_core_alua_drop_lu_gp,
+};
+
+static struct config_item_type target_core_alua_lu_gps_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_alua_lu_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
+#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_tg_pt_gp_show_attr_##_name, \
+ target_core_alua_tg_pt_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_tg_pt_gp_show_attr_##_name);
+
+/*
+ * alua_access_state
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ unsigned long tmp;
+ int new_state, ret;
+
+ if (!tg_pt_gp->tg_pt_gp_valid_id) {
+ pr_err("Unable to do implict ALUA on non valid"
+ " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract new ALUA access state from"
+ " %s\n", page);
+ return -EINVAL;
+ }
+ new_state = (int)tmp;
+
+ if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
+ pr_err("Unable to process implict configfs ALUA"
+ " transition while TPGS_IMPLICT_ALUA is disabled\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
+ NULL, NULL, new_state, 0);
+ return (!ret) ? count : -EINVAL;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_status
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%s\n",
+ core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int new_status, ret;
+
+ if (!tg_pt_gp->tg_pt_gp_valid_id) {
+ pr_err("Unable to do set ALUA access status on non"
+ " valid tg_pt_gp ID: %hu\n",
+ tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract new ALUA access status"
+ " from %s\n", page);
+ return -EINVAL;
+ }
+ new_status = (int)tmp;
+
+ if ((new_status != ALUA_STATUS_NONE) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
+ pr_err("Illegal ALUA access status: 0x%02x\n",
+ new_status);
+ return -EINVAL;
+ }
+
+ tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_type
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_access_type(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_access_type(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_write_metadata
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_write_metadata\n");
+ return -EINVAL;
+ }
+
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for alua_write_metadata:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
+
+
+
+/*
+ * nonop_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
+
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * trans_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * preferred
+ */
+
+static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_preferred_bit(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_preferred_bit(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
+
+/*
+ * tg_pt_gp_id
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ if (!tg_pt_gp->tg_pt_gp_valid_id)
+ return 0;
+
+ return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ unsigned long tg_pt_gp_id;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tg_pt_gp_id);
+ if (ret < 0) {
+ pr_err("strict_strtoul() returned %d for"
+ " tg_pt_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (tg_pt_gp_id > 0x0000ffff) {
+ pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", tg_pt_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
+ "core/alua/tg_pt_gps/%s to ID: %hu\n",
+ config_item_name(&alua_tg_pt_gp_cg->cg_item),
+ tg_pt_gp->tg_pt_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ struct se_port *port;
+ struct se_portal_group *tpg;
+ struct se_lun *lun;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[TG_PT_GROUP_NAME_BUF];
+
+ memset(buf, 0, TG_PT_GROUP_NAME_BUF);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = tg_pt_gp_mem->tg_pt;
+ tpg = port->sep_tpg;
+ lun = port->sep_lun;
+
+ cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
+ "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ pr_warn("Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
+ tg_pt_gp_group);
+
+static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
+ &target_core_alua_tg_pt_gp_alua_access_state.attr,
+ &target_core_alua_tg_pt_gp_alua_access_status.attr,
+ &target_core_alua_tg_pt_gp_alua_access_type.attr,
+ &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
+ &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_preferred.attr,
+ &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
+ &target_core_alua_tg_pt_gp_members.attr,
+ NULL,
+};
+
+static void target_core_alua_tg_pt_gp_release(struct config_item *item)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
+ struct t10_alua_tg_pt_gp, tg_pt_gp_group);
+
+ core_alua_free_tg_pt_gp(tg_pt_gp);
+}
+
+static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
+ .release = target_core_alua_tg_pt_gp_release,
+ .show_attribute = target_core_alua_tg_pt_gp_attr_show,
+ .store_attribute = target_core_alua_tg_pt_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gp_cit = {
+ .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
+ .ct_attrs = target_core_alua_tg_pt_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+
+static struct config_group *target_core_alua_create_tg_pt_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua *alua = container_of(group, struct t10_alua,
+ alua_tg_pt_gps_group);
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
+ struct config_group *alua_tg_pt_gp_cg = NULL;
+ struct config_item *alua_tg_pt_gp_ci = NULL;
+
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
+ if (!tg_pt_gp)
+ return NULL;
+
+ alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_tg_pt_gp_cg, name,
+ &target_core_alua_tg_pt_gp_cit);
+
+ pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s\n",
+ config_item_name(alua_tg_pt_gp_ci));
+
+ return alua_tg_pt_gp_cg;
+}
+
+static void target_core_alua_drop_tg_pt_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
+ struct t10_alua_tg_pt_gp, tg_pt_gp_group);
+
+ pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s, ID: %hu\n",
+ config_item_name(item), tg_pt_gp->tg_pt_gp_id);
+ /*
+ * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
+ * -> target_core_alua_tg_pt_gp_release().
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
+ .make_group = &target_core_alua_create_tg_pt_gp,
+ .drop_item = &target_core_alua_drop_tg_pt_gp,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gps_cit = {
+ .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_cit */
+
+/*
+ * target_core_alua_cit is a ConfigFS group that lives under
+ * /sys/kernel/config/target/core/alua. There are default groups
+ * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
+ * target_core_alua_cit in target_core_init_configfs() below.
+ */
+static struct config_item_type target_core_alua_cit = {
+ .ct_item_ops = NULL,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_cit */
+
+/* Start functions for struct config_item_type target_core_stat_cit */
+
+static struct config_group *target_core_stat_mkdir(
+ struct config_group *group,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static void target_core_stat_rmdir(
+ struct config_group *group,
+ struct config_item *item)
+{
+ return;
+}
+
+static struct configfs_group_operations target_core_stat_group_ops = {
+ .make_group = &target_core_stat_mkdir,
+ .drop_item = &target_core_stat_rmdir,
+};
+
+static struct config_item_type target_core_stat_cit = {
+ .ct_group_ops = &target_core_stat_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_stat_cit */
+
+/* Start functions for struct config_item_type target_core_hba_cit */
+
+static struct config_group *target_core_make_subdev(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_dev *se_dev;
+ struct se_subsystem_api *t;
+ struct config_item *hba_ci = &group->cg_item;
+ struct se_hba *hba = item_to_hba(hba_ci);
+ struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
+ struct config_group *dev_stat_grp = NULL;
+ int errno = -ENOMEM, ret;
+
+ ret = mutex_lock_interruptible(&hba->hba_access_mutex);
+ if (ret)
+ return ERR_PTR(ret);
+ /*
+ * Locate the struct se_subsystem_api from parent's struct se_hba.
+ */
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!se_dev) {
+ pr_err("Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ goto unlock;
+ }
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_pr.registration_lock);
+ spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+
+ se_dev->se_dev_hba = hba;
+ dev_cg = &se_dev->se_dev_group;
+
+ dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
+ GFP_KERNEL);
+ if (!dev_cg->default_groups)
+ goto out;
+ /*
+ * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
+ * for ->allocate_virtdevice()
+ *
+ * se_dev->se_dev_ptr will be set after ->create_virtdev()
+ * has been called successfully in the next level up in the
+ * configfs tree for device object's struct config_group.
+ */
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
+ if (!se_dev->se_dev_su_ptr) {
+ pr_err("Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ goto out;
+ }
+
+ config_group_init_type_name(&se_dev->se_dev_group, name,
+ &target_core_dev_cit);
+ config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
+ &target_core_dev_attrib_cit);
+ config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
+ &target_core_dev_pr_cit);
+ config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
+ &target_core_dev_wwn_cit);
+ config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
+ "alua", &target_core_alua_tg_pt_gps_cit);
+ config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
+ "statistics", &target_core_stat_cit);
+
+ dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
+ dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
+ dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
+ dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
+ dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
+ dev_cg->default_groups[5] = NULL;
+ /*
+ * Add core/$HBA/$DEV/alua/default_tg_pt_gp
+ */
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
+ if (!tg_pt_gp)
+ goto out;
+
+ tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
+ tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!tg_pt_gp_cg->default_groups) {
+ pr_err("Unable to allocate tg_pt_gp_cg->"
+ "default_groups\n");
+ goto out;
+ }
+
+ config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
+ "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
+ tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
+ tg_pt_gp_cg->default_groups[1] = NULL;
+ se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
+ /*
+ * Add core/$HBA/$DEV/statistics/ default groups
+ */
+ dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
+ dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
+ GFP_KERNEL);
+ if (!dev_stat_grp->default_groups) {
+ pr_err("Unable to allocate dev_stat_grp->default_groups\n");
+ goto out;
+ }
+ target_stat_setup_dev_default_groups(se_dev);
+
+ pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
+ " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
+
+ mutex_unlock(&hba->hba_access_mutex);
+ return &se_dev->se_dev_group;
+out:
+ if (se_dev->t10_alua.default_tg_pt_gp) {
+ core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
+ se_dev->t10_alua.default_tg_pt_gp = NULL;
+ }
+ if (dev_stat_grp)
+ kfree(dev_stat_grp->default_groups);
+ if (tg_pt_gp_cg)
+ kfree(tg_pt_gp_cg->default_groups);
+ if (dev_cg)
+ kfree(dev_cg->default_groups);
+ if (se_dev->se_dev_su_ptr)
+ t->free_device(se_dev->se_dev_su_ptr);
+ kfree(se_dev);
+unlock:
+ mutex_unlock(&hba->hba_access_mutex);
+ return ERR_PTR(errno);
+}
+
+static void target_core_drop_subdev(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct se_hba *hba;
+ struct config_item *df_item;
+ struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
+ int i;
+
+ hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
+
+ mutex_lock(&hba->hba_access_mutex);
+
+ dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
+ for (i = 0; dev_stat_grp->default_groups[i]; i++) {
+ df_item = &dev_stat_grp->default_groups[i]->cg_item;
+ dev_stat_grp->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(dev_stat_grp->default_groups);
+
+ tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
+ for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
+ df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
+ tg_pt_gp_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(tg_pt_gp_cg->default_groups);
+ /*
+ * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
+ * directly from target_core_alua_tg_pt_gp_release().
+ */
+ se_dev->t10_alua.default_tg_pt_gp = NULL;
+
+ dev_cg = &se_dev->se_dev_group;
+ for (i = 0; dev_cg->default_groups[i]; i++) {
+ df_item = &dev_cg->default_groups[i]->cg_item;
+ dev_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ /*
+ * The releasing of se_dev and associated se_dev->se_dev_ptr is done
+ * from target_core_dev_item_ops->release() ->target_core_dev_release().
+ */
+ config_item_put(item);
+ mutex_unlock(&hba->hba_access_mutex);
+}
+
+static struct configfs_group_operations target_core_hba_group_ops = {
+ .make_group = target_core_make_subdev,
+ .drop_item = target_core_drop_subdev,
+};
+
+CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
+#define SE_HBA_ATTR(_name, _mode) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_hba_show_attr_##_name, \
+ target_core_hba_store_attr_##_name);
+
+#define SE_HBA_ATTR_RO(_name) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_hba_show_attr_##_name);
+
+static ssize_t target_core_hba_show_attr_hba_info(
+ struct se_hba *hba,
+ char *page)
+{
+ return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
+ hba->hba_id, hba->transport->name,
+ TARGET_CORE_CONFIGFS_VERSION);
+}
+
+SE_HBA_ATTR_RO(hba_info);
+
+static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
+ char *page)
+{
+ int hba_mode = 0;
+
+ if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
+ hba_mode = 1;
+
+ return sprintf(page, "%d\n", hba_mode);
+}
+
+static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
+ const char *page, size_t count)
+{
+ struct se_subsystem_api *transport = hba->transport;
+ unsigned long mode_flag;
+ int ret;
+
+ if (transport->pmode_enable_hba == NULL)
+ return -EINVAL;
+
+ ret = strict_strtoul(page, 0, &mode_flag);
+ if (ret < 0) {
+ pr_err("Unable to extract hba mode flag: %d\n", ret);
+ return -EINVAL;
+ }
+
+ spin_lock(&hba->device_lock);
+ if (!list_empty(&hba->hba_dev_list)) {
+ pr_err("Unable to set hba_mode with active devices\n");
+ spin_unlock(&hba->device_lock);
+ return -EINVAL;
+ }
+ spin_unlock(&hba->device_lock);
+
+ ret = transport->pmode_enable_hba(hba, mode_flag);
+ if (ret < 0)
+ return -EINVAL;
+ if (ret > 0)
+ hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
+ else if (ret == 0)
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+
+ return count;
+}
+
+SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
+
+static void target_core_hba_release(struct config_item *item)
+{
+ struct se_hba *hba = container_of(to_config_group(item),
+ struct se_hba, hba_group);
+ core_delete_hba(hba);
+}
+
+static struct configfs_attribute *target_core_hba_attrs[] = {
+ &target_core_hba_hba_info.attr,
+ &target_core_hba_hba_mode.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_hba_item_ops = {
+ .release = target_core_hba_release,
+ .show_attribute = target_core_hba_attr_show,
+ .store_attribute = target_core_hba_attr_store,
+};
+
+static struct config_item_type target_core_hba_cit = {
+ .ct_item_ops = &target_core_hba_item_ops,
+ .ct_group_ops = &target_core_hba_group_ops,
+ .ct_attrs = target_core_hba_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *target_core_call_addhbatotarget(
+ struct config_group *group,
+ const char *name)
+{
+ char *se_plugin_str, *str, *str2;
+ struct se_hba *hba;
+ char buf[TARGET_CORE_NAME_MAX_LEN];
+ unsigned long plugin_dep_id = 0;
+ int ret;
+
+ memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
+ if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
+ pr_err("Passed *name strlen(): %d exceeds"
+ " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
+ TARGET_CORE_NAME_MAX_LEN);
+ return ERR_PTR(-ENAMETOOLONG);
+ }
+ snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
+
+ str = strstr(buf, "_");
+ if (!str) {
+ pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
+ return ERR_PTR(-EINVAL);
+ }
+ se_plugin_str = buf;
+ /*
+ * Special case for subsystem plugins that have "_" in their names.
+ * Namely rd_direct and rd_mcp..
+ */
+ str2 = strstr(str+1, "_");
+ if (str2) {
+ *str2 = '\0'; /* Terminate for *se_plugin_str */
+ str2++; /* Skip to start of plugin dependent ID */
+ str = str2;
+ } else {
+ *str = '\0'; /* Terminate for *se_plugin_str */
+ str++; /* Skip to start of plugin dependent ID */
+ }
+
+ ret = strict_strtoul(str, 0, &plugin_dep_id);
+ if (ret < 0) {
+ pr_err("strict_strtoul() returned %d for"
+ " plugin_dep_id\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * Load up TCM subsystem plugins if they have not already been loaded.
+ */
+ transport_subsystem_check_init();
+
+ hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
+ if (IS_ERR(hba))
+ return ERR_CAST(hba);
+
+ config_group_init_type_name(&hba->hba_group, name,
+ &target_core_hba_cit);
+
+ return &hba->hba_group;
+}
+
+static void target_core_call_delhbafromtarget(
+ struct config_group *group,
+ struct config_item *item)
+{
+ /*
+ * core_delete_hba() is called from target_core_hba_item_ops->release()
+ * -> target_core_hba_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_group_ops = {
+ .make_group = target_core_call_addhbatotarget,
+ .drop_item = target_core_call_delhbafromtarget,
+};
+
+static struct config_item_type target_core_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_group_ops,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* Stop functions for struct config_item_type target_core_hba_cit */
+
+static int __init target_core_init_configfs(void)
+{
+ struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
+ struct config_group *lu_gp_cg = NULL;
+ struct configfs_subsystem *subsys;
+ struct t10_alua_lu_gp *lu_gp;
+ int ret;
+
+ pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
+ " Engine: %s on %s/%s on "UTS_RELEASE"\n",
+ TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
+
+ subsys = target_core_subsystem[0];
+ config_group_init(&subsys->su_group);
+ mutex_init(&subsys->su_mutex);
+
+ ret = init_se_kmem_caches();
+ if (ret < 0)
+ return ret;
+ /*
+ * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
+ * and ALUA Logical Unit Group and Target Port Group infrastructure.
+ */
+ target_cg = &subsys->su_group;
+ target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!target_cg->default_groups) {
+ pr_err("Unable to allocate target_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&target_core_hbagroup,
+ "core", &target_core_cit);
+ target_cg->default_groups[0] = &target_core_hbagroup;
+ target_cg->default_groups[1] = NULL;
+ /*
+ * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
+ */
+ hba_cg = &target_core_hbagroup;
+ hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!hba_cg->default_groups) {
+ pr_err("Unable to allocate hba_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+ config_group_init_type_name(&alua_group,
+ "alua", &target_core_alua_cit);
+ hba_cg->default_groups[0] = &alua_group;
+ hba_cg->default_groups[1] = NULL;
+ /*
+ * Add ALUA Logical Unit Group and Target Port Group ConfigFS
+ * groups under /sys/kernel/config/target/core/alua/
+ */
+ alua_cg = &alua_group;
+ alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!alua_cg->default_groups) {
+ pr_err("Unable to allocate alua_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&alua_lu_gps_group,
+ "lu_gps", &target_core_alua_lu_gps_cit);
+ alua_cg->default_groups[0] = &alua_lu_gps_group;
+ alua_cg->default_groups[1] = NULL;
+ /*
+ * Add core/alua/lu_gps/default_lu_gp
+ */
+ lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
+ if (IS_ERR(lu_gp)) {
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ lu_gp_cg = &alua_lu_gps_group;
+ lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!lu_gp_cg->default_groups) {
+ pr_err("Unable to allocate lu_gp_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
+ &target_core_alua_lu_gp_cit);
+ lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
+ lu_gp_cg->default_groups[1] = NULL;
+ default_lu_gp = lu_gp;
+ /*
+ * Register the target_core_mod subsystem with configfs.
+ */
+ ret = configfs_register_subsystem(subsys);
+ if (ret < 0) {
+ pr_err("Error %d while registering subsystem %s\n",
+ ret, subsys->su_group.cg_item.ci_namebuf);
+ goto out_global;
+ }
+ pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
+ " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
+ " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
+ /*
+ * Register built-in RAMDISK subsystem logic for virtual LUN 0
+ */
+ ret = rd_module_init();
+ if (ret < 0)
+ goto out;
+
+ ret = core_dev_setup_virtual_lun0();
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ configfs_unregister_subsystem(subsys);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+out_global:
+ if (default_lu_gp) {
+ core_alua_free_lu_gp(default_lu_gp);
+ default_lu_gp = NULL;
+ }
+ if (lu_gp_cg)
+ kfree(lu_gp_cg->default_groups);
+ if (alua_cg)
+ kfree(alua_cg->default_groups);
+ if (hba_cg)
+ kfree(hba_cg->default_groups);
+ kfree(target_cg->default_groups);
+ release_se_kmem_caches();
+ return ret;
+}
+
+static void __exit target_core_exit_configfs(void)
+{
+ struct configfs_subsystem *subsys;
+ struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
+ struct config_item *item;
+ int i;
+
+ subsys = target_core_subsystem[0];
+
+ lu_gp_cg = &alua_lu_gps_group;
+ for (i = 0; lu_gp_cg->default_groups[i]; i++) {
+ item = &lu_gp_cg->default_groups[i]->cg_item;
+ lu_gp_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(lu_gp_cg->default_groups);
+ lu_gp_cg->default_groups = NULL;
+
+ alua_cg = &alua_group;
+ for (i = 0; alua_cg->default_groups[i]; i++) {
+ item = &alua_cg->default_groups[i]->cg_item;
+ alua_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(alua_cg->default_groups);
+ alua_cg->default_groups = NULL;
+
+ hba_cg = &target_core_hbagroup;
+ for (i = 0; hba_cg->default_groups[i]; i++) {
+ item = &hba_cg->default_groups[i]->cg_item;
+ hba_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(hba_cg->default_groups);
+ hba_cg->default_groups = NULL;
+ /*
+ * We expect subsys->su_group.default_groups to be released
+ * by configfs subsystem provider logic..
+ */
+ configfs_unregister_subsystem(subsys);
+ kfree(subsys->su_group.default_groups);
+
+ core_alua_free_lu_gp(default_lu_gp);
+ default_lu_gp = NULL;
+
+ pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
+ " Infrastructure\n");
+
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+ release_se_kmem_caches();
+}
+
+MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(target_core_init_configfs);
+module_exit(target_core_exit_configfs);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_device.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_device.c
new file mode 100644
index 0000000..79d9865
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_device.c
@@ -0,0 +1,1698 @@
+/*******************************************************************************
+ * Filename: target_core_device.c (based on iscsi_target_device.c)
+ *
+ * This file contains the TCM Virtual Device and Disk Transport
+ * agnostic related functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/kthread.h>
+#include <linux/in.h>
+#include <linux/export.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+static void se_dev_start(struct se_device *dev);
+static void se_dev_stop(struct se_device *dev);
+
+static struct se_hba *lun0_hba;
+static struct se_subsystem_dev *lun0_su_dev;
+/* not static, needed by tpg.c */
+struct se_device *g_lun0_dev;
+
+int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
+{
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = se_cmd->se_sess;
+ struct se_device *dev;
+ unsigned long flags;
+
+ if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
+ se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
+ if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ struct se_dev_entry *deve = se_cmd->se_deve;
+
+ deve->total_cmds++;
+ deve->total_bytes += se_cmd->data_length;
+
+ if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
+ (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+ " Access for 0x%08x\n",
+ se_cmd->se_tfo->get_fabric_name(),
+ unpacked_lun);
+ spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
+ return -EACCES;
+ }
+
+ if (se_cmd->data_direction == DMA_TO_DEVICE)
+ deve->write_bytes += se_cmd->data_length;
+ else if (se_cmd->data_direction == DMA_FROM_DEVICE)
+ deve->read_bytes += se_cmd->data_length;
+
+ deve->deve_cmds++;
+
+ se_lun = deve->se_lun;
+ se_cmd->se_lun = deve->se_lun;
+ se_cmd->pr_res_key = deve->pr_res_key;
+ se_cmd->orig_fe_lun = unpacked_lun;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+ spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
+
+ if (!se_lun) {
+ /*
+ * Use the se_portal_group->tpg_virt_lun0 to allow for
+ * REPORT_LUNS, et al to be returned when no active
+ * MappedLUN=0 exists for this Initiator Port.
+ */
+ if (unpacked_lun != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+ " Access for 0x%08x\n",
+ se_cmd->se_tfo->get_fabric_name(),
+ unpacked_lun);
+ return -ENODEV;
+ }
+ /*
+ * Force WRITE PROTECT for virtual LUN 0
+ */
+ if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
+ (se_cmd->data_direction != DMA_NONE)) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -EACCES;
+ }
+
+ se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+ se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+ se_cmd->orig_fe_lun = 0;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+ /*
+ * Determine if the struct se_lun is online.
+ * FIXME: Check for LUN_RESET + UNIT Attention
+ */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -ENODEV;
+ }
+
+ /* Directly associate cmd with se_dev */
+ se_cmd->se_dev = se_lun->lun_se_dev;
+
+ /* TODO: get rid of this and use atomics for stats */
+ dev = se_lun->lun_se_dev;
+ spin_lock_irqsave(&dev->stats_lock, flags);
+ dev->num_cmds++;
+ if (se_cmd->data_direction == DMA_TO_DEVICE)
+ dev->write_bytes += se_cmd->data_length;
+ else if (se_cmd->data_direction == DMA_FROM_DEVICE)
+ dev->read_bytes += se_cmd->data_length;
+ spin_unlock_irqrestore(&dev->stats_lock, flags);
+
+ spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
+ list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
+ spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_lookup_cmd_lun);
+
+int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = se_cmd->se_sess;
+ struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
+ unsigned long flags;
+
+ if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
+ se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
+ deve = se_cmd->se_deve;
+
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ se_tmr->tmr_lun = deve->se_lun;
+ se_cmd->se_lun = deve->se_lun;
+ se_lun = deve->se_lun;
+ se_cmd->pr_res_key = deve->pr_res_key;
+ se_cmd->orig_fe_lun = unpacked_lun;
+ }
+ spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
+
+ if (!se_lun) {
+ pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+ " Access for 0x%08x\n",
+ se_cmd->se_tfo->get_fabric_name(),
+ unpacked_lun);
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -ENODEV;
+ }
+ /*
+ * Determine if the struct se_lun is online.
+ * FIXME: Check for LUN_RESET + UNIT Attention
+ */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -ENODEV;
+ }
+
+ /* Directly associate cmd with se_dev */
+ se_cmd->se_dev = se_lun->lun_se_dev;
+ se_tmr->tmr_dev = se_lun->lun_se_dev;
+
+ spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
+ list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
+ spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_lookup_tmr_lun);
+
+/*
+ * This function is called from core_scsi3_emulate_pro_register_and_move()
+ * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
+ * when a matching rtpi is found.
+ */
+struct se_dev_entry *core_get_se_deve_from_rtpi(
+ struct se_node_acl *nacl,
+ u16 rtpi)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_port *port;
+ struct se_portal_group *tpg = nacl->se_tpg;
+ u32 i;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ lun = deve->se_lun;
+ if (!lun) {
+ pr_err("%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ continue;
+ }
+ port = lun->lun_sep;
+ if (!port) {
+ pr_err("%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ continue;
+ }
+ if (port->sep_rtpi != rtpi)
+ continue;
+
+ atomic_inc(&deve->pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return deve;
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return NULL;
+}
+
+int core_free_device_list_for_node(
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ u32 i;
+
+ if (!nacl->device_list)
+ return 0;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ if (!deve->se_lun) {
+ pr_err("%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ continue;
+ }
+ lun = deve->se_lun;
+
+ spin_unlock_irq(&nacl->device_list_lock);
+ core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
+ nacl->device_list = NULL;
+
+ return 0;
+}
+
+void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
+{
+ struct se_dev_entry *deve;
+ unsigned long flags;
+
+ spin_lock_irqsave(&se_nacl->device_list_lock, flags);
+ deve = se_nacl->device_list[se_cmd->orig_fe_lun];
+ deve->deve_cmds--;
+ spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
+}
+
+void core_update_device_list_access(
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl)
+{
+ struct se_dev_entry *deve;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[mapped_lun];
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+}
+
+/* core_update_device_list_for_node():
+ *
+ *
+ */
+int core_update_device_list_for_node(
+ struct se_lun *lun,
+ struct se_lun_acl *lun_acl,
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg,
+ int enable)
+{
+ struct se_port *port = lun->lun_sep;
+ struct se_dev_entry *deve = nacl->device_list[mapped_lun];
+ int trans = 0;
+ /*
+ * If the MappedLUN entry is being disabled, the entry in
+ * port->sep_alua_list must be removed now before clearing the
+ * struct se_dev_entry pointers below as logic in
+ * core_alua_do_transition_tg_pt() depends on these being present.
+ */
+ if (!enable) {
+ /*
+ * deve->se_lun_acl will be NULL for demo-mode created LUNs
+ * that have not been explicitly concerted to MappedLUNs ->
+ * struct se_lun_acl, but we remove deve->alua_port_list from
+ * port->sep_alua_list. This also means that active UAs and
+ * NodeACL context specific PR metadata for demo-mode
+ * MappedLUN *deve will be released below..
+ */
+ spin_lock_bh(&port->sep_alua_lock);
+ list_del(&deve->alua_port_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+ }
+
+ spin_lock_irq(&nacl->device_list_lock);
+ if (enable) {
+ /*
+ * Check if the call is handling demo mode -> explict LUN ACL
+ * transition. This transition must be for the same struct se_lun
+ * + mapped_lun that was setup in demo mode..
+ */
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ if (deve->se_lun_acl != NULL) {
+ pr_err("struct se_dev_entry->se_lun_acl"
+ " already set for demo mode -> explict"
+ " LUN ACL transition\n");
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -EINVAL;
+ }
+ if (deve->se_lun != lun) {
+ pr_err("struct se_dev_entry->se_lun does"
+ " match passed struct se_lun for demo mode"
+ " -> explict LUN ACL transition\n");
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -EINVAL;
+ }
+ deve->se_lun_acl = lun_acl;
+ trans = 1;
+ } else {
+ deve->se_lun = lun;
+ deve->se_lun_acl = lun_acl;
+ deve->mapped_lun = mapped_lun;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
+ }
+
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ }
+
+ if (trans) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return 0;
+ }
+ deve->creation_time = get_jiffies_64();
+ deve->attach_count++;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ return 0;
+ }
+ /*
+ * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
+ * PR operation to complete.
+ */
+ spin_unlock_irq(&nacl->device_list_lock);
+ while (atomic_read(&deve->pr_ref_count) != 0)
+ cpu_relax();
+ spin_lock_irq(&nacl->device_list_lock);
+ /*
+ * Disable struct se_dev_entry LUN ACL mapping
+ */
+ core_scsi3_ua_release_all(deve);
+ deve->se_lun = NULL;
+ deve->se_lun_acl = NULL;
+ deve->lun_flags = 0;
+ deve->creation_time = 0;
+ deve->attach_count--;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
+ return 0;
+}
+
+/* core_clear_lun_from_tpg():
+ *
+ *
+ */
+void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
+{
+ struct se_node_acl *nacl;
+ struct se_dev_entry *deve;
+ u32 i;
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = nacl->device_list[i];
+ if (lun != deve->se_lun)
+ continue;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ core_update_device_list_for_node(lun, NULL,
+ deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
+ nacl, tpg, 0);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ }
+ spin_unlock_irq(&tpg->acl_node_lock);
+}
+
+static struct se_port *core_alloc_port(struct se_device *dev)
+{
+ struct se_port *port, *port_tmp;
+
+ port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
+ if (!port) {
+ pr_err("Unable to allocate struct se_port\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&port->sep_alua_list);
+ INIT_LIST_HEAD(&port->sep_list);
+ atomic_set(&port->sep_tg_pt_secondary_offline, 0);
+ spin_lock_init(&port->sep_alua_lock);
+ mutex_init(&port->sep_tg_pt_md_mutex);
+
+ spin_lock(&dev->se_port_lock);
+ if (dev->dev_port_count == 0x0000ffff) {
+ pr_warn("Reached dev->dev_port_count =="
+ " 0x0000ffff\n");
+ spin_unlock(&dev->se_port_lock);
+ return ERR_PTR(-ENOSPC);
+ }
+again:
+ /*
+ * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
+ * Here is the table from spc4r17 section 7.7.3.8.
+ *
+ * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
+ *
+ * Code Description
+ * 0h Reserved
+ * 1h Relative port 1, historically known as port A
+ * 2h Relative port 2, historically known as port B
+ * 3h to FFFFh Relative port 3 through 65 535
+ */
+ port->sep_rtpi = dev->dev_rpti_counter++;
+ if (!port->sep_rtpi)
+ goto again;
+
+ list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
+ /*
+ * Make sure RELATIVE TARGET PORT IDENTIFER is unique
+ * for 16-bit wrap..
+ */
+ if (port->sep_rtpi == port_tmp->sep_rtpi)
+ goto again;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return port;
+}
+
+static void core_export_port(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_port *port,
+ struct se_lun *lun)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
+
+ spin_lock(&dev->se_port_lock);
+ spin_lock(&lun->lun_sep_lock);
+ port->sep_tpg = tpg;
+ port->sep_lun = lun;
+ lun->lun_sep = port;
+ spin_unlock(&lun->lun_sep_lock);
+
+ list_add_tail(&port->sep_list, &dev->dev_sep_list);
+ spin_unlock(&dev->se_port_lock);
+
+ if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+ tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
+ if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
+ pr_err("Unable to allocate t10_alua_tg_pt"
+ "_gp_member_t\n");
+ return;
+ }
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ su_dev->t10_alua.default_tg_pt_gp);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ pr_debug("%s/%s: Adding to default ALUA Target Port"
+ " Group: alua/default_tg_pt_gp\n",
+ dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
+ }
+
+ dev->dev_port_count++;
+ port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
+}
+
+/*
+ * Called with struct se_device->se_port_lock spinlock held.
+ */
+static void core_release_port(struct se_device *dev, struct se_port *port)
+ __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
+{
+ /*
+ * Wait for any port reference for PR ALL_TG_PT=1 operation
+ * to complete in __core_scsi3_alloc_registration()
+ */
+ spin_unlock(&dev->se_port_lock);
+ if (atomic_read(&port->sep_tg_pt_ref_cnt))
+ cpu_relax();
+ spin_lock(&dev->se_port_lock);
+
+ core_alua_free_tg_pt_gp_mem(port);
+
+ list_del(&port->sep_list);
+ dev->dev_port_count--;
+ kfree(port);
+}
+
+int core_dev_export(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port;
+
+ port = core_alloc_port(dev);
+ if (IS_ERR(port))
+ return PTR_ERR(port);
+
+ lun->lun_se_dev = dev;
+ se_dev_start(dev);
+
+ atomic_inc(&dev->dev_export_obj.obj_access_count);
+ core_export_port(dev, tpg, port, lun);
+ return 0;
+}
+
+void core_dev_unexport(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port = lun->lun_sep;
+
+ spin_lock(&lun->lun_sep_lock);
+ if (lun->lun_se_dev == NULL) {
+ spin_unlock(&lun->lun_sep_lock);
+ return;
+ }
+ spin_unlock(&lun->lun_sep_lock);
+
+ spin_lock(&dev->se_port_lock);
+ atomic_dec(&dev->dev_export_obj.obj_access_count);
+ core_release_port(dev, port);
+ spin_unlock(&dev->se_port_lock);
+
+ se_dev_stop(dev);
+ lun->lun_se_dev = NULL;
+}
+
+int target_report_luns(struct se_task *se_task)
+{
+ struct se_cmd *se_cmd = se_task->task_se_cmd;
+ struct se_dev_entry *deve;
+ struct se_session *se_sess = se_cmd->se_sess;
+ unsigned char *buf;
+ u32 lun_count = 0, offset = 8, i;
+
+ buf = transport_kmap_data_sg(se_cmd);
+ if (!buf)
+ return -ENOMEM;
+
+ /*
+ * If no struct se_session pointer is present, this struct se_cmd is
+ * coming via a target_core_mod PASSTHROUGH op, and not through
+ * a $FABRIC_MOD. In that case, report LUN=0 only.
+ */
+ if (!se_sess) {
+ int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
+ lun_count = 1;
+ goto done;
+ }
+
+ spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = se_sess->se_node_acl->device_list[i];
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+ /*
+ * We determine the correct LUN LIST LENGTH even once we
+ * have reached the initial allocation length.
+ * See SPC2-R20 7.19.
+ */
+ lun_count++;
+ if ((offset + 8) > se_cmd->data_length)
+ continue;
+
+ int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
+ offset += 8;
+ }
+ spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
+
+ /*
+ * See SPC3 r07, page 159.
+ */
+done:
+ lun_count *= 8;
+ buf[0] = ((lun_count >> 24) & 0xff);
+ buf[1] = ((lun_count >> 16) & 0xff);
+ buf[2] = ((lun_count >> 8) & 0xff);
+ buf[3] = (lun_count & 0xff);
+ transport_kunmap_data_sg(se_cmd);
+
+ se_task->task_scsi_status = GOOD;
+ transport_complete_task(se_task, 1);
+ return 0;
+}
+
+/* se_release_device_for_hba():
+ *
+ *
+ */
+void se_release_device_for_hba(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
+ (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
+ se_dev_stop(dev);
+
+ if (dev->dev_ptr) {
+ kthread_stop(dev->process_thread);
+ if (dev->transport->free_device)
+ dev->transport->free_device(dev->dev_ptr);
+ }
+
+ spin_lock(&hba->device_lock);
+ list_del(&dev->dev_list);
+ hba->dev_count--;
+ spin_unlock(&hba->device_lock);
+
+ core_scsi3_free_all_registrations(dev);
+ se_release_vpd_for_dev(dev);
+
+ kfree(dev);
+}
+
+void se_release_vpd_for_dev(struct se_device *dev)
+{
+ struct t10_vpd *vpd, *vpd_tmp;
+
+ spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
+ list_for_each_entry_safe(vpd, vpd_tmp,
+ &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
+ list_del(&vpd->vpd_list);
+ kfree(vpd);
+ }
+ spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
+}
+
+/* se_free_virtual_device():
+ *
+ * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
+ */
+int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
+{
+ if (!list_empty(&dev->dev_sep_list))
+ dump_stack();
+
+ core_alua_free_lu_gp_mem(dev);
+ se_release_device_for_hba(dev);
+
+ return 0;
+}
+
+static void se_dev_start(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_inc(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
+ if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
+ } else if (dev->dev_status &
+ TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
+ dev->dev_status &=
+ ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+ }
+ }
+ spin_unlock(&hba->device_lock);
+}
+
+static void se_dev_stop(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_dec(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
+ if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
+ } else if (dev->dev_status &
+ TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+ }
+ }
+ spin_unlock(&hba->device_lock);
+}
+
+int se_dev_check_online(struct se_device *dev)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&dev->dev_status_lock, flags);
+ ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
+ spin_unlock_irqrestore(&dev->dev_status_lock, flags);
+
+ return ret;
+}
+
+int se_dev_check_shutdown(struct se_device *dev)
+{
+ int ret;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
+ spin_unlock_irq(&dev->dev_status_lock);
+
+ return ret;
+}
+
+u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
+{
+ u32 aligned_max_sectors;
+ u32 alignment;
+ /*
+ * Limit max_sectors to a PAGE_SIZE aligned value for modern
+ * transport_allocate_data_tasks() operation.
+ */
+ alignment = max(1ul, PAGE_SIZE / block_size);
+ aligned_max_sectors = rounddown(max_sectors, alignment);
+
+ if (max_sectors != aligned_max_sectors)
+ pr_info("Rounding down aligned max_sectors from %u to %u\n",
+ max_sectors, aligned_max_sectors);
+
+ return aligned_max_sectors;
+}
+
+void se_dev_set_default_attribs(
+ struct se_device *dev,
+ struct se_dev_limits *dev_limits)
+{
+ struct queue_limits *limits = &dev_limits->limits;
+
+ dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
+ dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
+ dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
+ dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
+ dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
+ dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
+ dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
+ dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
+ dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
+ dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
+ dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
+ dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
+ dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
+ /*
+ * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
+ * iblock_create_virtdevice() from struct queue_limits values
+ * if blk_queue_discard()==1
+ */
+ dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
+ dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
+ DA_MAX_UNMAP_BLOCK_DESC_COUNT;
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
+ DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
+ /*
+ * block_size is based on subsystem plugin dependent requirements.
+ */
+ dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
+ dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
+ /*
+ * max_sectors is based on subsystem plugin dependent requirements.
+ */
+ dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
+ /*
+ * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
+ */
+ limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
+ limits->logical_block_size);
+ dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
+ /*
+ * Set fabric_max_sectors, which is reported in block limits
+ * VPD page (B0h).
+ */
+ dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
+ /*
+ * Set optimal_sectors from fabric_max_sectors, which can be
+ * lowered via configfs.
+ */
+ dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
+ /*
+ * queue_depth is based on subsystem plugin dependent requirements.
+ */
+ dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
+ dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
+}
+
+int se_dev_set_max_unmap_lba_count(
+ struct se_device *dev,
+ u32 max_unmap_lba_count)
+{
+ dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
+ pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
+ dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
+ return 0;
+}
+
+int se_dev_set_max_unmap_block_desc_count(
+ struct se_device *dev,
+ u32 max_unmap_block_desc_count)
+{
+ dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
+ max_unmap_block_desc_count;
+ pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
+ dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity(
+ struct se_device *dev,
+ u32 unmap_granularity)
+{
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
+ pr_debug("dev[%p]: Set unmap_granularity: %u\n",
+ dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity_alignment(
+ struct se_device *dev,
+ u32 unmap_granularity_alignment)
+{
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
+ pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
+ dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
+ return 0;
+}
+
+int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (flag) {
+ pr_err("dpo_emulated not supported\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (flag && dev->transport->fua_write_emulated == 0) {
+ pr_err("fua_write_emulated not supported\n");
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
+ pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
+ dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
+ return 0;
+}
+
+int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (flag) {
+ pr_err("ua read emulated not supported\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ if (flag && dev->transport->write_cache_emulated == 0) {
+ pr_err("write_cache_emulated not supported\n");
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
+ pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
+ dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
+ return 0;
+}
+
+int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1) && (flag != 2)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device"
+ " UA_INTRLCK_CTRL while dev_export_obj: %d count"
+ " exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
+ pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
+ dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
+
+ return 0;
+}
+
+int se_dev_set_emulate_tas(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device TAS while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
+ pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
+ dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
+
+ return 0;
+}
+
+int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+ pr_err("Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
+ pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+ pr_err("Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
+ pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
+ pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
+ (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
+ return 0;
+}
+
+int se_dev_set_is_nonrot(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
+ pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
+{
+ if (flag != 0) {
+ printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
+ " reordering not implemented\n", dev);
+ return -ENOSYS;
+ }
+ dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
+ pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
+ return 0;
+}
+
+/*
+ * Note, this can only be called on unexported SE Device Object.
+ */
+int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device TCQ while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (!queue_depth) {
+ pr_err("dev[%p]: Illegal ZERO value for queue"
+ "_depth\n", dev);
+ return -EINVAL;
+ }
+
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
+ pr_err("dev[%p]: Passed queue_depth: %u"
+ " exceeds TCM/SE_Device TCQ: %u\n",
+ dev, queue_depth,
+ dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
+ return -EINVAL;
+ }
+ } else {
+ if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
+ if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
+ pr_err("dev[%p]: Passed queue_depth:"
+ " %u exceeds TCM/SE_Device MAX"
+ " TCQ: %u\n", dev, queue_depth,
+ dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
+ return -EINVAL;
+ }
+ }
+ }
+
+ dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
+ pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
+ dev, queue_depth);
+ return 0;
+}
+
+int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
+{
+ int force = 0; /* Force setting for VDEVS */
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device"
+ " max_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (!max_sectors) {
+ pr_err("dev[%p]: Illegal ZERO value for"
+ " max_sectors\n", dev);
+ return -EINVAL;
+ }
+ if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
+ pr_err("dev[%p]: Passed max_sectors: %u less than"
+ " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
+ DA_STATUS_MAX_SECTORS_MIN);
+ return -EINVAL;
+ }
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
+ pr_err("dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors:"
+ " %u\n", dev, max_sectors,
+ dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+ return -EINVAL;
+ }
+ } else {
+ if (!force && (max_sectors >
+ dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
+ pr_err("dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors"
+ ": %u, use force=1 to override.\n", dev,
+ max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+ return -EINVAL;
+ }
+ if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
+ pr_err("dev[%p]: Passed max_sectors: %u"
+ " greater than DA_STATUS_MAX_SECTORS_MAX:"
+ " %u\n", dev, max_sectors,
+ DA_STATUS_MAX_SECTORS_MAX);
+ return -EINVAL;
+ }
+ }
+ /*
+ * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
+ */
+ max_sectors = se_dev_align_max_sectors(max_sectors,
+ dev->se_sub_dev->se_dev_attrib.block_size);
+
+ dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
+ pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
+ dev, max_sectors);
+ return 0;
+}
+
+int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
+{
+ int block_size = dev->se_sub_dev->se_dev_attrib.block_size;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device"
+ " fabric_max_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (!fabric_max_sectors) {
+ pr_err("dev[%p]: Illegal ZERO value for"
+ " fabric_max_sectors\n", dev);
+ return -EINVAL;
+ }
+ if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
+ pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
+ " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
+ DA_STATUS_MAX_SECTORS_MIN);
+ return -EINVAL;
+ }
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
+ pr_err("dev[%p]: Passed fabric_max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors:"
+ " %u\n", dev, fabric_max_sectors,
+ dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+ return -EINVAL;
+ }
+ } else {
+ if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
+ pr_err("dev[%p]: Passed fabric_max_sectors: %u"
+ " greater than DA_STATUS_MAX_SECTORS_MAX:"
+ " %u\n", dev, fabric_max_sectors,
+ DA_STATUS_MAX_SECTORS_MAX);
+ return -EINVAL;
+ }
+ }
+ /*
+ * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
+ */
+ if (!block_size) {
+ block_size = 512;
+ pr_warn("Defaulting to 512 for zero block_size\n");
+ }
+ fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
+ block_size);
+
+ dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
+ pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
+ dev, fabric_max_sectors);
+ return 0;
+}
+
+int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device"
+ " optimal_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ pr_err("dev[%p]: Passed optimal_sectors cannot be"
+ " changed for TCM/pSCSI\n", dev);
+ return -EINVAL;
+ }
+ if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
+ pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
+ " greater than fabric_max_sectors: %u\n", dev,
+ optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
+ return -EINVAL;
+ }
+
+ dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
+ pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
+ dev, optimal_sectors);
+ return 0;
+}
+
+int se_dev_set_block_size(struct se_device *dev, u32 block_size)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ pr_err("dev[%p]: Unable to change SE Device block_size"
+ " while dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+
+ if ((block_size != 512) &&
+ (block_size != 1024) &&
+ (block_size != 2048) &&
+ (block_size != 4096)) {
+ pr_err("dev[%p]: Illegal value for block_device: %u"
+ " for SE device, must be 512, 1024, 2048 or 4096\n",
+ dev, block_size);
+ return -EINVAL;
+ }
+
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ pr_err("dev[%p]: Not allowed to change block_size for"
+ " Physical Device, use for Linux/SCSI to change"
+ " block_size for underlying hardware\n", dev);
+ return -EINVAL;
+ }
+
+ dev->se_sub_dev->se_dev_attrib.block_size = block_size;
+ pr_debug("dev[%p]: SE Device block_size changed to %u\n",
+ dev, block_size);
+ return 0;
+}
+
+struct se_lun *core_dev_add_lun(
+ struct se_portal_group *tpg,
+ struct se_hba *hba,
+ struct se_device *dev,
+ u32 lun)
+{
+ struct se_lun *lun_p;
+ u32 lun_access = 0;
+ int rc;
+
+ if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
+ pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
+ atomic_read(&dev->dev_access_obj.obj_access_count));
+ return ERR_PTR(-EACCES);
+ }
+
+ lun_p = core_tpg_pre_addlun(tpg, lun);
+ if (IS_ERR(lun_p))
+ return lun_p;
+
+ if (dev->dev_flags & DF_READ_ONLY)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+
+ rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
+ if (rc < 0)
+ return ERR_PTR(rc);
+
+ pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
+ " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
+ tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
+ /*
+ * Update LUN maps for dynamically added initiators when
+ * generate_node_acl is enabled.
+ */
+ if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
+ struct se_node_acl *acl;
+ spin_lock_irq(&tpg->acl_node_lock);
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (acl->dynamic_node_acl &&
+ (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
+ !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
+ spin_unlock_irq(&tpg->acl_node_lock);
+ core_tpg_add_node_to_devs(acl, tpg);
+ spin_lock_irq(&tpg->acl_node_lock);
+ }
+ }
+ spin_unlock_irq(&tpg->acl_node_lock);
+ }
+
+ return lun_p;
+}
+
+/* core_dev_del_lun():
+ *
+ *
+ */
+int core_dev_del_lun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ lun = core_tpg_pre_dellun(tpg, unpacked_lun);
+ if (IS_ERR(lun))
+ return PTR_ERR(lun);
+
+ core_tpg_post_dellun(tpg, lun);
+
+ pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
+ " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
+ tpg->se_tpg_tfo->get_fabric_name());
+
+ return 0;
+}
+
+struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
+ "_PER_TPG-1: %u for Target Portal Group: %hu\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ lun = tpg->tpg_lun_list[unpacked_lun];
+
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
+ pr_err("%s Logical Unit Number: %u is not free on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+/* core_dev_get_lun():
+ *
+ *
+ */
+static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
+ "_TPG-1: %u for Target Portal Group: %hu\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ lun = tpg->tpg_lun_list[unpacked_lun];
+
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
+ pr_err("%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_node_acl *nacl,
+ u32 mapped_lun,
+ int *ret)
+{
+ struct se_lun_acl *lacl;
+
+ if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
+ pr_err("%s InitiatorName exceeds maximum size.\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ *ret = -EOVERFLOW;
+ return NULL;
+ }
+ lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
+ if (!lacl) {
+ pr_err("Unable to allocate memory for struct se_lun_acl.\n");
+ *ret = -ENOMEM;
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&lacl->lacl_list);
+ lacl->mapped_lun = mapped_lun;
+ lacl->se_lun_nacl = nacl;
+ snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
+ nacl->initiatorname);
+
+ return lacl;
+}
+
+int core_dev_add_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *lacl,
+ u32 unpacked_lun,
+ u32 lun_access)
+{
+ struct se_lun *lun;
+ struct se_node_acl *nacl;
+
+ lun = core_dev_get_lun(tpg, unpacked_lun);
+ if (!lun) {
+ pr_err("%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ return -EINVAL;
+ }
+
+ nacl = lacl->se_lun_nacl;
+ if (!nacl)
+ return -EINVAL;
+
+ if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
+ (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+
+ lacl->se_lun = lun;
+
+ if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
+ lun_access, nacl, tpg, 1) < 0)
+ return -EINVAL;
+
+ spin_lock(&lun->lun_acl_lock);
+ list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
+ atomic_inc(&lun->lun_acl_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&lun->lun_acl_lock);
+
+ pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
+ " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
+ (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
+ lacl->initiatorname);
+ /*
+ * Check to see if there are any existing persistent reservation APTPL
+ * pre-registrations that need to be enabled for this LUN ACL..
+ */
+ core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
+ return 0;
+}
+
+/* core_dev_del_initiator_node_lun_acl():
+ *
+ *
+ */
+int core_dev_del_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ struct se_lun_acl *lacl)
+{
+ struct se_node_acl *nacl;
+
+ nacl = lacl->se_lun_nacl;
+ if (!nacl)
+ return -EINVAL;
+
+ spin_lock(&lun->lun_acl_lock);
+ list_del(&lacl->lacl_list);
+ atomic_dec(&lun->lun_acl_count);
+ smp_mb__after_atomic_dec();
+ spin_unlock(&lun->lun_acl_lock);
+
+ core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+ lacl->se_lun = NULL;
+
+ pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
+ " InitiatorNode: %s Mapped LUN: %u\n",
+ tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
+ lacl->initiatorname, lacl->mapped_lun);
+
+ return 0;
+}
+
+void core_dev_free_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *lacl)
+{
+ pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
+ " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ tpg->se_tpg_tfo->get_fabric_name(),
+ lacl->initiatorname, lacl->mapped_lun);
+
+ kfree(lacl);
+}
+
+int core_dev_setup_virtual_lun0(void)
+{
+ struct se_hba *hba;
+ struct se_device *dev;
+ struct se_subsystem_dev *se_dev = NULL;
+ struct se_subsystem_api *t;
+ char buf[16];
+ int ret;
+
+ hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
+ if (IS_ERR(hba))
+ return PTR_ERR(hba);
+
+ lun0_hba = hba;
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!se_dev) {
+ pr_err("Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_pr.registration_lock);
+ spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+ se_dev->se_dev_hba = hba;
+
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
+ if (!se_dev->se_dev_su_ptr) {
+ pr_err("Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ lun0_su_dev = se_dev;
+
+ memset(buf, 0, 16);
+ sprintf(buf, "rd_pages=8");
+ t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (IS_ERR(dev)) {
+ ret = PTR_ERR(dev);
+ goto out;
+ }
+ dev->dev_link_magic = SE_DEV_LINK_MAGIC;
+ se_dev->se_dev_ptr = dev;
+ g_lun0_dev = dev;
+
+ return 0;
+out:
+ lun0_su_dev = NULL;
+ kfree(se_dev);
+ if (lun0_hba) {
+ core_delete_hba(lun0_hba);
+ lun0_hba = NULL;
+ }
+ return ret;
+}
+
+
+void core_dev_release_virtual_lun0(void)
+{
+ struct se_hba *hba = lun0_hba;
+ struct se_subsystem_dev *su_dev = lun0_su_dev;
+
+ if (!hba)
+ return;
+
+ if (g_lun0_dev)
+ se_free_virtual_device(g_lun0_dev, hba);
+
+ kfree(su_dev);
+ core_delete_hba(hba);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_configfs.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_configfs.c
new file mode 100644
index 0000000..6b79ee7
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_configfs.c
@@ -0,0 +1,1223 @@
+/*******************************************************************************
+* Filename: target_core_fabric_configfs.c
+ *
+ * This file contains generic fabric module configfs infrastructure for
+ * TCM v4.x code
+ *
+ * Copyright (c) 2010,2011 Rising Tide Systems
+ * Copyright (c) 2010,2011 Linux-iSCSI.org
+ *
+ * Copyright (c) Nicholas A. Bellinger <nab@linux-iscsi.org>
+*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+#include <linux/configfs.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+
+#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
+static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
+{ \
+ struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
+ struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
+ \
+ cit->ct_item_ops = _item_ops; \
+ cit->ct_group_ops = _group_ops; \
+ cit->ct_attrs = _attrs; \
+ cit->ct_owner = tf->tf_module; \
+ pr_debug("Setup generic %s\n", __stringify(_name)); \
+}
+
+/* Start of tfc_tpg_mappedlun_cit */
+
+static int target_fabric_mappedlun_link(
+ struct config_item *lun_acl_ci,
+ struct config_item *lun_ci)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
+ struct se_lun_acl, se_lun_group);
+ struct se_portal_group *se_tpg;
+ struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
+ int ret = 0, lun_access;
+
+ if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
+ pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
+ " %p to struct lun: %p\n", lun_ci, lun);
+ return -EFAULT;
+ }
+ /*
+ * Ensure that the source port exists
+ */
+ if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
+ pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
+ "_tpg does not exist\n");
+ return -EINVAL;
+ }
+ se_tpg = lun->lun_sep->sep_tpg;
+
+ nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
+ tpg_ci = &nacl_ci->ci_group->cg_item;
+ wwn_ci = &tpg_ci->ci_group->cg_item;
+ tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
+ wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
+ /*
+ * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
+ */
+ if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
+ pr_err("Illegal Initiator ACL SymLink outside of %s\n",
+ config_item_name(wwn_ci));
+ return -EINVAL;
+ }
+ if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
+ pr_err("Illegal Initiator ACL Symlink outside of %s"
+ " TPGT: %s\n", config_item_name(wwn_ci),
+ config_item_name(tpg_ci));
+ return -EINVAL;
+ }
+ /*
+ * If this struct se_node_acl was dynamically generated with
+ * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
+ * which be will write protected (READ-ONLY) when
+ * tpg_1/attrib/demo_mode_write_protect=1
+ */
+ spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
+ deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun];
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
+ lun_access = deve->lun_flags;
+ else
+ lun_access =
+ (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
+ se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
+ TRANSPORT_LUNFLAGS_READ_WRITE;
+ spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
+ /*
+ * Determine the actual mapped LUN value user wants..
+ *
+ * This value is what the SCSI Initiator actually sees the
+ * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
+ */
+ ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
+ lun->unpacked_lun, lun_access);
+
+ return (ret < 0) ? -EINVAL : 0;
+}
+
+static int target_fabric_mappedlun_unlink(
+ struct config_item *lun_acl_ci,
+ struct config_item *lun_ci)
+{
+ struct se_lun *lun;
+ struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
+ struct se_lun_acl, se_lun_group);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve = nacl->device_list[lacl->mapped_lun];
+ struct se_portal_group *se_tpg;
+ /*
+ * Determine if the underlying MappedLUN has already been released..
+ */
+ if (!deve->se_lun)
+ return 0;
+
+ lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
+ se_tpg = lun->lun_sep->sep_tpg;
+
+ core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
+ return 0;
+}
+
+CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
+#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
+static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_fabric_mappedlun_show_##_name, \
+ target_fabric_mappedlun_store_##_name);
+
+static ssize_t target_fabric_mappedlun_show_write_protect(
+ struct se_lun_acl *lacl,
+ char *page)
+{
+ struct se_node_acl *se_nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t len;
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ deve = se_nacl->device_list[lacl->mapped_lun];
+ len = sprintf(page, "%d\n",
+ (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
+ 1 : 0);
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ return len;
+}
+
+static ssize_t target_fabric_mappedlun_store_write_protect(
+ struct se_lun_acl *lacl,
+ const char *page,
+ size_t count)
+{
+ struct se_node_acl *se_nacl = lacl->se_lun_nacl;
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ unsigned long op;
+
+ if (strict_strtoul(page, 0, &op))
+ return -EINVAL;
+
+ if ((op != 1) && (op != 0))
+ return -EINVAL;
+
+ core_update_device_list_access(lacl->mapped_lun, (op) ?
+ TRANSPORT_LUNFLAGS_READ_ONLY :
+ TRANSPORT_LUNFLAGS_READ_WRITE,
+ lacl->se_lun_nacl);
+
+ pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
+ " Mapped LUN: %u Write Protect bit to %s\n",
+ se_tpg->se_tpg_tfo->get_fabric_name(),
+ lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
+
+ return count;
+
+}
+
+TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
+
+static void target_fabric_mappedlun_release(struct config_item *item)
+{
+ struct se_lun_acl *lacl = container_of(to_config_group(item),
+ struct se_lun_acl, se_lun_group);
+ struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
+
+ core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
+}
+
+static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
+ &target_fabric_mappedlun_write_protect.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
+ .release = target_fabric_mappedlun_release,
+ .show_attribute = target_fabric_mappedlun_attr_show,
+ .store_attribute = target_fabric_mappedlun_attr_store,
+ .allow_link = target_fabric_mappedlun_link,
+ .drop_link = target_fabric_mappedlun_unlink,
+};
+
+TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
+ target_fabric_mappedlun_attrs);
+
+/* End of tfc_tpg_mappedlun_cit */
+
+/* Start of tfc_tpg_mappedlun_port_cit */
+
+static struct config_group *target_core_mappedlun_stat_mkdir(
+ struct config_group *group,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static void target_core_mappedlun_stat_rmdir(
+ struct config_group *group,
+ struct config_item *item)
+{
+ return;
+}
+
+static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
+ .make_group = target_core_mappedlun_stat_mkdir,
+ .drop_item = target_core_mappedlun_stat_rmdir,
+};
+
+TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
+ NULL);
+
+/* End of tfc_tpg_mappedlun_port_cit */
+
+/* Start of tfc_tpg_nacl_attrib_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
+
+static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
+ .show_attribute = target_fabric_nacl_attrib_attr_show,
+ .store_attribute = target_fabric_nacl_attrib_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_attrib_cit */
+
+/* Start of tfc_tpg_nacl_auth_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
+
+static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
+ .show_attribute = target_fabric_nacl_auth_attr_show,
+ .store_attribute = target_fabric_nacl_auth_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_auth_cit */
+
+/* Start of tfc_tpg_nacl_param_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
+
+static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
+ .show_attribute = target_fabric_nacl_param_attr_show,
+ .store_attribute = target_fabric_nacl_param_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_param_cit */
+
+/* Start of tfc_tpg_nacl_base_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
+
+static struct config_group *target_fabric_make_mappedlun(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_node_acl *se_nacl = container_of(group,
+ struct se_node_acl, acl_group);
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_lun_acl *lacl;
+ struct config_item *acl_ci;
+ struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
+ char *buf;
+ unsigned long mapped_lun;
+ int ret = 0;
+
+ acl_ci = &group->cg_item;
+ if (!acl_ci) {
+ pr_err("Unable to locatel acl_ci\n");
+ return NULL;
+ }
+
+ buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
+ if (!buf) {
+ pr_err("Unable to allocate memory for name buf\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ snprintf(buf, strlen(name) + 1, "%s", name);
+ /*
+ * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
+ */
+ if (strstr(buf, "lun_") != buf) {
+ pr_err("Unable to locate \"lun_\" from buf: %s"
+ " name: %s\n", buf, name);
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * Determine the Mapped LUN value. This is what the SCSI Initiator
+ * Port will actually see.
+ */
+ if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
+ ret = -EINVAL;
+ goto out;
+ }
+ if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n", mapped_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
+ ret = -EINVAL;
+ goto out;
+ }
+
+ lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
+ mapped_lun, &ret);
+ if (!lacl) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ lacl_cg = &lacl->se_lun_group;
+ lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!lacl_cg->default_groups) {
+ pr_err("Unable to allocate lacl_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ config_group_init_type_name(&lacl->se_lun_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
+ config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
+ "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
+ lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
+ lacl_cg->default_groups[1] = NULL;
+
+ ml_stat_grp = &lacl->ml_stat_grps.stat_group;
+ ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
+ GFP_KERNEL);
+ if (!ml_stat_grp->default_groups) {
+ pr_err("Unable to allocate ml_stat_grp->default_groups\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ target_stat_setup_mappedlun_default_groups(lacl);
+
+ kfree(buf);
+ return &lacl->se_lun_group;
+out:
+ if (lacl_cg)
+ kfree(lacl_cg->default_groups);
+ kfree(buf);
+ return ERR_PTR(ret);
+}
+
+static void target_fabric_drop_mappedlun(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_lun_acl *lacl = container_of(to_config_group(item),
+ struct se_lun_acl, se_lun_group);
+ struct config_item *df_item;
+ struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
+ int i;
+
+ ml_stat_grp = &lacl->ml_stat_grps.stat_group;
+ for (i = 0; ml_stat_grp->default_groups[i]; i++) {
+ df_item = &ml_stat_grp->default_groups[i]->cg_item;
+ ml_stat_grp->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(ml_stat_grp->default_groups);
+
+ lacl_cg = &lacl->se_lun_group;
+ for (i = 0; lacl_cg->default_groups[i]; i++) {
+ df_item = &lacl_cg->default_groups[i]->cg_item;
+ lacl_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(lacl_cg->default_groups);
+
+ config_item_put(item);
+}
+
+static void target_fabric_nacl_base_release(struct config_item *item)
+{
+ struct se_node_acl *se_nacl = container_of(to_config_group(item),
+ struct se_node_acl, acl_group);
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ tf->tf_ops.fabric_drop_nodeacl(se_nacl);
+}
+
+static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
+ .release = target_fabric_nacl_base_release,
+ .show_attribute = target_fabric_nacl_base_attr_show,
+ .store_attribute = target_fabric_nacl_base_attr_store,
+};
+
+static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
+ .make_group = target_fabric_make_mappedlun,
+ .drop_item = target_fabric_drop_mappedlun,
+};
+
+TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
+ &target_fabric_nacl_base_group_ops, NULL);
+
+/* End of tfc_tpg_nacl_base_cit */
+
+/* Start of tfc_node_fabric_stats_cit */
+/*
+ * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
+ * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
+ */
+TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
+
+/* End of tfc_wwn_fabric_stats_cit */
+
+/* Start of tfc_tpg_nacl_cit */
+
+static struct config_group *target_fabric_make_nodeacl(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_acl_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_node_acl *se_nacl;
+ struct config_group *nacl_cg;
+
+ if (!tf->tf_ops.fabric_make_nodeacl) {
+ pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
+ if (IS_ERR(se_nacl))
+ return ERR_CAST(se_nacl);
+
+ nacl_cg = &se_nacl->acl_group;
+ nacl_cg->default_groups = se_nacl->acl_default_groups;
+ nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
+ nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
+ nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
+ nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
+ nacl_cg->default_groups[4] = NULL;
+
+ config_group_init_type_name(&se_nacl->acl_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
+ config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
+ config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
+ config_group_init_type_name(&se_nacl->acl_param_group, "param",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
+ config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
+ "fabric_statistics",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
+
+ return &se_nacl->acl_group;
+}
+
+static void target_fabric_drop_nodeacl(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_node_acl *se_nacl = container_of(to_config_group(item),
+ struct se_node_acl, acl_group);
+ struct config_item *df_item;
+ struct config_group *nacl_cg;
+ int i;
+
+ nacl_cg = &se_nacl->acl_group;
+ for (i = 0; nacl_cg->default_groups[i]; i++) {
+ df_item = &nacl_cg->default_groups[i]->cg_item;
+ nacl_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ /*
+ * struct se_node_acl free is done in target_fabric_nacl_base_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_fabric_nacl_group_ops = {
+ .make_group = target_fabric_make_nodeacl,
+ .drop_item = target_fabric_drop_nodeacl,
+};
+
+TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
+
+/* End of tfc_tpg_nacl_cit */
+
+/* Start of tfc_tpg_np_base_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
+
+static void target_fabric_np_base_release(struct config_item *item)
+{
+ struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
+ struct se_tpg_np, tpg_np_group);
+ struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ tf->tf_ops.fabric_drop_np(se_tpg_np);
+}
+
+static struct configfs_item_operations target_fabric_np_base_item_ops = {
+ .release = target_fabric_np_base_release,
+ .show_attribute = target_fabric_np_base_attr_show,
+ .store_attribute = target_fabric_np_base_attr_store,
+};
+
+TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_np_base_cit */
+
+/* Start of tfc_tpg_np_cit */
+
+static struct config_group *target_fabric_make_np(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_np_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_tpg_np *se_tpg_np;
+
+ if (!tf->tf_ops.fabric_make_np) {
+ pr_err("tf->tf_ops.fabric_make_np is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
+ if (!se_tpg_np || IS_ERR(se_tpg_np))
+ return ERR_PTR(-EINVAL);
+
+ se_tpg_np->tpg_np_parent = se_tpg;
+ config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
+
+ return &se_tpg_np->tpg_np_group;
+}
+
+static void target_fabric_drop_np(
+ struct config_group *group,
+ struct config_item *item)
+{
+ /*
+ * struct se_tpg_np is released via target_fabric_np_base_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_fabric_np_group_ops = {
+ .make_group = &target_fabric_make_np,
+ .drop_item = &target_fabric_drop_np,
+};
+
+TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
+
+/* End of tfc_tpg_np_cit */
+
+/* Start of tfc_tpg_port_cit */
+
+CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
+#define TCM_PORT_ATTR(_name, _mode) \
+static struct target_fabric_port_attribute target_fabric_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_fabric_port_show_attr_##_name, \
+ target_fabric_port_store_attr_##_name);
+
+#define TCM_PORT_ATTOR_RO(_name) \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_fabric_port_show_attr_##_name);
+
+/*
+ * alua_tg_pt_gp
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_offline
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_show_offline_bit(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_store_offline_bit(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_status
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_show_secondary_status(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_store_secondary_status(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_write_md
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_show_secondary_write_metadata(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!lun || !lun->lun_sep)
+ return -ENODEV;
+
+ return core_alua_store_secondary_write_metadata(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
+
+
+static struct configfs_attribute *target_fabric_port_attrs[] = {
+ &target_fabric_port_alua_tg_pt_gp.attr,
+ &target_fabric_port_alua_tg_pt_offline.attr,
+ &target_fabric_port_alua_tg_pt_status.attr,
+ &target_fabric_port_alua_tg_pt_write_md.attr,
+ NULL,
+};
+
+CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
+
+static int target_fabric_port_link(
+ struct config_item *lun_ci,
+ struct config_item *se_dev_ci)
+{
+ struct config_item *tpg_ci;
+ struct se_device *dev;
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_lun *lun_p;
+ struct se_portal_group *se_tpg;
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(se_dev_ci), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
+ se_tpg = container_of(to_config_group(tpg_ci),
+ struct se_portal_group, tpg_group);
+ tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ if (lun->lun_se_dev != NULL) {
+ pr_err("Port Symlink already exists\n");
+ return -EEXIST;
+ }
+
+ dev = se_dev->se_dev_ptr;
+ if (!dev) {
+ pr_err("Unable to locate struct se_device pointer from"
+ " %s\n", config_item_name(se_dev_ci));
+ ret = -ENODEV;
+ goto out;
+ }
+ if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
+ pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
+ " %p to struct se_device: %p\n", se_dev_ci, dev);
+ return -EFAULT;
+ }
+
+ lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
+ lun->unpacked_lun);
+ if (IS_ERR(lun_p)) {
+ pr_err("core_dev_add_lun() failed\n");
+ ret = PTR_ERR(lun_p);
+ goto out;
+ }
+
+ if (tf->tf_ops.fabric_post_link) {
+ /*
+ * Call the optional fabric_post_link() to allow a
+ * fabric module to setup any additional state once
+ * core_dev_add_lun() has been called..
+ */
+ tf->tf_ops.fabric_post_link(se_tpg, lun);
+ }
+
+ return 0;
+out:
+ return ret;
+}
+
+static int target_fabric_port_unlink(
+ struct config_item *lun_ci,
+ struct config_item *se_dev_ci)
+{
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ if (tf->tf_ops.fabric_pre_unlink) {
+ /*
+ * Call the optional fabric_pre_unlink() to allow a
+ * fabric module to release any additional stat before
+ * core_dev_del_lun() is called.
+ */
+ tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
+ }
+
+ core_dev_del_lun(se_tpg, lun->unpacked_lun);
+ return 0;
+}
+
+static struct configfs_item_operations target_fabric_port_item_ops = {
+ .show_attribute = target_fabric_port_attr_show,
+ .store_attribute = target_fabric_port_attr_store,
+ .allow_link = target_fabric_port_link,
+ .drop_link = target_fabric_port_unlink,
+};
+
+TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
+
+/* End of tfc_tpg_port_cit */
+
+/* Start of tfc_tpg_port_stat_cit */
+
+static struct config_group *target_core_port_stat_mkdir(
+ struct config_group *group,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static void target_core_port_stat_rmdir(
+ struct config_group *group,
+ struct config_item *item)
+{
+ return;
+}
+
+static struct configfs_group_operations target_fabric_port_stat_group_ops = {
+ .make_group = target_core_port_stat_mkdir,
+ .drop_item = target_core_port_stat_rmdir,
+};
+
+TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
+
+/* End of tfc_tpg_port_stat_cit */
+
+/* Start of tfc_tpg_lun_cit */
+
+static struct config_group *target_fabric_make_lun(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_lun_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
+ unsigned long unpacked_lun;
+ int errno;
+
+ if (strstr(name, "lun_") != name) {
+ pr_err("Unable to locate \'_\" in"
+ " \"lun_$LUN_NUMBER\"\n");
+ return ERR_PTR(-EINVAL);
+ }
+ if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
+ return ERR_PTR(-EINVAL);
+
+ lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
+ if (!lun)
+ return ERR_PTR(-EINVAL);
+
+ lun_cg = &lun->lun_group;
+ lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!lun_cg->default_groups) {
+ pr_err("Unable to allocate lun_cg->default_groups\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ config_group_init_type_name(&lun->lun_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
+ config_group_init_type_name(&lun->port_stat_grps.stat_group,
+ "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
+ lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
+ lun_cg->default_groups[1] = NULL;
+
+ port_stat_grp = &lun->port_stat_grps.stat_group;
+ port_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
+ GFP_KERNEL);
+ if (!port_stat_grp->default_groups) {
+ pr_err("Unable to allocate port_stat_grp->default_groups\n");
+ errno = -ENOMEM;
+ goto out;
+ }
+ target_stat_setup_port_default_groups(lun);
+
+ return &lun->lun_group;
+out:
+ if (lun_cg)
+ kfree(lun_cg->default_groups);
+ return ERR_PTR(errno);
+}
+
+static void target_fabric_drop_lun(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_lun *lun = container_of(to_config_group(item),
+ struct se_lun, lun_group);
+ struct config_item *df_item;
+ struct config_group *lun_cg, *port_stat_grp;
+ int i;
+
+ port_stat_grp = &lun->port_stat_grps.stat_group;
+ for (i = 0; port_stat_grp->default_groups[i]; i++) {
+ df_item = &port_stat_grp->default_groups[i]->cg_item;
+ port_stat_grp->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(port_stat_grp->default_groups);
+
+ lun_cg = &lun->lun_group;
+ for (i = 0; lun_cg->default_groups[i]; i++) {
+ df_item = &lun_cg->default_groups[i]->cg_item;
+ lun_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(lun_cg->default_groups);
+
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_fabric_lun_group_ops = {
+ .make_group = &target_fabric_make_lun,
+ .drop_item = &target_fabric_drop_lun,
+};
+
+TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
+
+/* End of tfc_tpg_lun_cit */
+
+/* Start of tfc_tpg_attrib_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
+
+static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
+ .show_attribute = target_fabric_tpg_attrib_attr_show,
+ .store_attribute = target_fabric_tpg_attrib_attr_store,
+};
+
+TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_attrib_cit */
+
+/* Start of tfc_tpg_param_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
+
+static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
+ .show_attribute = target_fabric_tpg_param_attr_show,
+ .store_attribute = target_fabric_tpg_param_attr_store,
+};
+
+TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_param_cit */
+
+/* Start of tfc_tpg_base_cit */
+/*
+ * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
+ */
+CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
+
+static void target_fabric_tpg_release(struct config_item *item)
+{
+ struct se_portal_group *se_tpg = container_of(to_config_group(item),
+ struct se_portal_group, tpg_group);
+ struct se_wwn *wwn = se_tpg->se_tpg_wwn;
+ struct target_fabric_configfs *tf = wwn->wwn_tf;
+
+ tf->tf_ops.fabric_drop_tpg(se_tpg);
+}
+
+static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
+ .release = target_fabric_tpg_release,
+ .show_attribute = target_fabric_tpg_attr_show,
+ .store_attribute = target_fabric_tpg_attr_store,
+};
+
+TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_base_cit */
+
+/* Start of tfc_tpg_cit */
+
+static struct config_group *target_fabric_make_tpg(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
+ struct target_fabric_configfs *tf = wwn->wwn_tf;
+ struct se_portal_group *se_tpg;
+
+ if (!tf->tf_ops.fabric_make_tpg) {
+ pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
+ if (!se_tpg || IS_ERR(se_tpg))
+ return ERR_PTR(-EINVAL);
+ /*
+ * Setup default groups from pre-allocated se_tpg->tpg_default_groups
+ */
+ se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
+ se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
+ se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
+ se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
+ se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
+ se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
+ se_tpg->tpg_group.default_groups[5] = NULL;
+
+ config_group_init_type_name(&se_tpg->tpg_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
+ config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
+ &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
+ config_group_init_type_name(&se_tpg->tpg_np_group, "np",
+ &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
+ config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
+ config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
+ &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
+ config_group_init_type_name(&se_tpg->tpg_param_group, "param",
+ &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
+
+ return &se_tpg->tpg_group;
+}
+
+static void target_fabric_drop_tpg(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_portal_group *se_tpg = container_of(to_config_group(item),
+ struct se_portal_group, tpg_group);
+ struct config_group *tpg_cg = &se_tpg->tpg_group;
+ struct config_item *df_item;
+ int i;
+ /*
+ * Release default groups, but do not release tpg_cg->default_groups
+ * memory as it is statically allocated at se_tpg->tpg_default_groups.
+ */
+ for (i = 0; tpg_cg->default_groups[i]; i++) {
+ df_item = &tpg_cg->default_groups[i]->cg_item;
+ tpg_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+
+ config_item_put(item);
+}
+
+static void target_fabric_release_wwn(struct config_item *item)
+{
+ struct se_wwn *wwn = container_of(to_config_group(item),
+ struct se_wwn, wwn_group);
+ struct target_fabric_configfs *tf = wwn->wwn_tf;
+
+ tf->tf_ops.fabric_drop_wwn(wwn);
+}
+
+static struct configfs_item_operations target_fabric_tpg_item_ops = {
+ .release = target_fabric_release_wwn,
+};
+
+static struct configfs_group_operations target_fabric_tpg_group_ops = {
+ .make_group = target_fabric_make_tpg,
+ .drop_item = target_fabric_drop_tpg,
+};
+
+TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
+ NULL);
+
+/* End of tfc_tpg_cit */
+
+/* Start of tfc_wwn_fabric_stats_cit */
+/*
+ * This is used as a placeholder for struct se_wwn->fabric_stat_group
+ * to allow fabrics access to ->fabric_stat_group->default_groups[]
+ */
+TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
+
+/* End of tfc_wwn_fabric_stats_cit */
+
+/* Start of tfc_wwn_cit */
+
+static struct config_group *target_fabric_make_wwn(
+ struct config_group *group,
+ const char *name)
+{
+ struct target_fabric_configfs *tf = container_of(group,
+ struct target_fabric_configfs, tf_group);
+ struct se_wwn *wwn;
+
+ if (!tf->tf_ops.fabric_make_wwn) {
+ pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
+ if (!wwn || IS_ERR(wwn))
+ return ERR_PTR(-EINVAL);
+
+ wwn->wwn_tf = tf;
+ /*
+ * Setup default groups from pre-allocated wwn->wwn_default_groups
+ */
+ wwn->wwn_group.default_groups = wwn->wwn_default_groups;
+ wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
+ wwn->wwn_group.default_groups[1] = NULL;
+
+ config_group_init_type_name(&wwn->wwn_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_cit);
+ config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
+ &TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
+
+ return &wwn->wwn_group;
+}
+
+static void target_fabric_drop_wwn(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_wwn *wwn = container_of(to_config_group(item),
+ struct se_wwn, wwn_group);
+ struct config_item *df_item;
+ struct config_group *cg = &wwn->wwn_group;
+ int i;
+
+ for (i = 0; cg->default_groups[i]; i++) {
+ df_item = &cg->default_groups[i]->cg_item;
+ cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_fabric_wwn_group_ops = {
+ .make_group = target_fabric_make_wwn,
+ .drop_item = target_fabric_drop_wwn,
+};
+/*
+ * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
+ */
+CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
+
+static struct configfs_item_operations target_fabric_wwn_item_ops = {
+ .show_attribute = target_fabric_wwn_attr_show,
+ .store_attribute = target_fabric_wwn_attr_store,
+};
+
+TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
+
+/* End of tfc_wwn_cit */
+
+/* Start of tfc_discovery_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
+ tf_disc_group);
+
+static struct configfs_item_operations target_fabric_discovery_item_ops = {
+ .show_attribute = target_fabric_discovery_attr_show,
+ .store_attribute = target_fabric_discovery_attr_store,
+};
+
+TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
+
+/* End of tfc_discovery_cit */
+
+int target_fabric_setup_cits(struct target_fabric_configfs *tf)
+{
+ target_fabric_setup_discovery_cit(tf);
+ target_fabric_setup_wwn_cit(tf);
+ target_fabric_setup_wwn_fabric_stats_cit(tf);
+ target_fabric_setup_tpg_cit(tf);
+ target_fabric_setup_tpg_base_cit(tf);
+ target_fabric_setup_tpg_port_cit(tf);
+ target_fabric_setup_tpg_port_stat_cit(tf);
+ target_fabric_setup_tpg_lun_cit(tf);
+ target_fabric_setup_tpg_np_cit(tf);
+ target_fabric_setup_tpg_np_base_cit(tf);
+ target_fabric_setup_tpg_attrib_cit(tf);
+ target_fabric_setup_tpg_param_cit(tf);
+ target_fabric_setup_tpg_nacl_cit(tf);
+ target_fabric_setup_tpg_nacl_base_cit(tf);
+ target_fabric_setup_tpg_nacl_attrib_cit(tf);
+ target_fabric_setup_tpg_nacl_auth_cit(tf);
+ target_fabric_setup_tpg_nacl_param_cit(tf);
+ target_fabric_setup_tpg_nacl_stat_cit(tf);
+ target_fabric_setup_tpg_mappedlun_cit(tf);
+ target_fabric_setup_tpg_mappedlun_stat_cit(tf);
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_lib.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_lib.c
new file mode 100644
index 0000000..283a36e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_fabric_lib.c
@@ -0,0 +1,452 @@
+/*******************************************************************************
+ * Filename: target_core_fabric_lib.c
+ *
+ * This file contains generic high level protocol identifier and PR
+ * handlers for TCM fabric modules
+ *
+ * Copyright (c) 2010 Rising Tide Systems, Inc.
+ * Copyright (c) 2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_pr.h"
+
+/*
+ * Handlers for Serial Attached SCSI (SAS)
+ */
+u8 sas_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ /*
+ * Return a SAS Serial SCSI Protocol identifier for loopback operations
+ * This is defined in section 7.5.1 Table 362 in spc4r17
+ */
+ return 0x6;
+}
+EXPORT_SYMBOL(sas_get_fabric_proto_ident);
+
+u32 sas_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ unsigned char *ptr;
+ int ret;
+
+ /*
+ * Set PROTOCOL IDENTIFIER to 6h for SAS
+ */
+ buf[0] = 0x06;
+ /*
+ * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
+ * over SAS Serial SCSI Protocol
+ */
+ ptr = &se_nacl->initiatorname[4]; /* Skip over 'naa. prefix */
+
+ ret = hex2bin(&buf[4], ptr, 8);
+ if (ret < 0)
+ pr_debug("sas transport_id: invalid hex string\n");
+
+ /*
+ * The SAS Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(sas_get_pr_transport_id);
+
+u32 sas_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ *format_code = 0;
+ /*
+ * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
+ * over SAS Serial SCSI Protocol
+ *
+ * The SAS Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(sas_get_pr_transport_id_len);
+
+/*
+ * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above
+ * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations.
+ */
+char *sas_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ /*
+ * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID
+ * for initiator ports using SCSI over SAS Serial SCSI Protocol
+ *
+ * The TransportID for a SAS Initiator Port is of fixed size of
+ * 24 bytes, and SAS does not contain a I_T nexus identifier,
+ * so we return the **port_nexus_ptr set to NULL.
+ */
+ *port_nexus_ptr = NULL;
+ *out_tid_len = 24;
+
+ return (char *)&buf[4];
+}
+EXPORT_SYMBOL(sas_parse_pr_out_transport_id);
+
+/*
+ * Handlers for Fibre Channel Protocol (FCP)
+ */
+u8 fc_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ return 0x0; /* 0 = fcp-2 per SPC4 section 7.5.1 */
+}
+EXPORT_SYMBOL(fc_get_fabric_proto_ident);
+
+u32 fc_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ *format_code = 0;
+ /*
+ * The FC Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(fc_get_pr_transport_id_len);
+
+u32 fc_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ unsigned char *ptr;
+ int i, ret;
+ u32 off = 8;
+
+ /*
+ * PROTOCOL IDENTIFIER is 0h for FCP-2
+ *
+ * From spc4r17, 7.5.4.2 TransportID for initiator ports using
+ * SCSI over Fibre Channel
+ *
+ * We convert the ASCII formatted N Port name into a binary
+ * encoded TransportID.
+ */
+ ptr = &se_nacl->initiatorname[0];
+
+ for (i = 0; i < 24; ) {
+ if (!strncmp(&ptr[i], ":", 1)) {
+ i++;
+ continue;
+ }
+ ret = hex2bin(&buf[off++], &ptr[i], 1);
+ if (ret < 0)
+ pr_debug("fc transport_id: invalid hex string\n");
+ i += 2;
+ }
+ /*
+ * The FC Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(fc_get_pr_transport_id);
+
+char *fc_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ /*
+ * The TransportID for a FC N Port is of fixed size of
+ * 24 bytes, and FC does not contain a I_T nexus identifier,
+ * so we return the **port_nexus_ptr set to NULL.
+ */
+ *port_nexus_ptr = NULL;
+ *out_tid_len = 24;
+
+ return (char *)&buf[8];
+}
+EXPORT_SYMBOL(fc_parse_pr_out_transport_id);
+
+/*
+ * Handlers for Internet Small Computer Systems Interface (iSCSI)
+ */
+
+u8 iscsi_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ /*
+ * This value is defined for "Internet SCSI (iSCSI)"
+ * in spc4r17 section 7.5.1 Table 362
+ */
+ return 0x5;
+}
+EXPORT_SYMBOL(iscsi_get_fabric_proto_ident);
+
+u32 iscsi_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ u32 off = 4, padding = 0;
+ u16 len = 0;
+
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * Set PROTOCOL IDENTIFIER to 5h for iSCSI
+ */
+ buf[0] = 0x05;
+ /*
+ * From spc4r17 Section 7.5.4.6: TransportID for initiator
+ * ports using SCSI over iSCSI.
+ *
+ * The null-terminated, null-padded (see 4.4.2) ISCSI NAME field
+ * shall contain the iSCSI name of an iSCSI initiator node (see
+ * RFC 3720). The first ISCSI NAME field byte containing an ASCII
+ * null character terminates the ISCSI NAME field without regard for
+ * the specified length of the iSCSI TransportID or the contents of
+ * the ADDITIONAL LENGTH field.
+ */
+ len = sprintf(&buf[off], "%s", se_nacl->initiatorname);
+ /*
+ * Add Extra byte for NULL terminator
+ */
+ len++;
+ /*
+ * If there is ISID present with the registration and *format code == 1
+ * 1, use iSCSI Initiator port TransportID format.
+ *
+ * Otherwise use iSCSI Initiator device TransportID format that
+ * does not contain the ASCII encoded iSCSI Initiator iSID value
+ * provied by the iSCSi Initiator during the iSCSI login process.
+ */
+ if ((*format_code == 1) && (pr_reg->isid_present_at_reg)) {
+ /*
+ * Set FORMAT CODE 01b for iSCSI Initiator port TransportID
+ * format.
+ */
+ buf[0] |= 0x40;
+ /*
+ * From spc4r17 Section 7.5.4.6: TransportID for initiator
+ * ports using SCSI over iSCSI. Table 390
+ *
+ * The SEPARATOR field shall contain the five ASCII
+ * characters ",i,0x".
+ *
+ * The null-terminated, null-padded ISCSI INITIATOR SESSION ID
+ * field shall contain the iSCSI initiator session identifier
+ * (see RFC 3720) in the form of ASCII characters that are the
+ * hexadecimal digits converted from the binary iSCSI initiator
+ * session identifier value. The first ISCSI INITIATOR SESSION
+ * ID field byte containing an ASCII null character
+ */
+ buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
+ buf[off+len] = 0x69; off++; /* ASCII Character: "i" */
+ buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
+ buf[off+len] = 0x30; off++; /* ASCII Character: "0" */
+ buf[off+len] = 0x78; off++; /* ASCII Character: "x" */
+ len += 5;
+ buf[off+len] = pr_reg->pr_reg_isid[0]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[1]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[2]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[3]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[4]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[5]; off++;
+ buf[off+len] = '\0'; off++;
+ len += 7;
+ }
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The ADDITIONAL LENGTH field specifies the number of bytes that follow
+ * in the TransportID. The additional length shall be at least 20 and
+ * shall be a multiple of four.
+ */
+ padding = ((-len) & 3);
+ if (padding != 0)
+ len += padding;
+
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff);
+ /*
+ * Increment value for total payload + header length for
+ * full status descriptor
+ */
+ len += 4;
+
+ return len;
+}
+EXPORT_SYMBOL(iscsi_get_pr_transport_id);
+
+u32 iscsi_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ u32 len = 0, padding = 0;
+
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ len = strlen(se_nacl->initiatorname);
+ /*
+ * Add extra byte for NULL terminator
+ */
+ len++;
+ /*
+ * If there is ISID present with the registration, use format code:
+ * 01b: iSCSI Initiator port TransportID format
+ *
+ * If there is not an active iSCSI session, use format code:
+ * 00b: iSCSI Initiator device TransportID format
+ */
+ if (pr_reg->isid_present_at_reg) {
+ len += 5; /* For ",i,0x" ASCII seperator */
+ len += 7; /* For iSCSI Initiator Session ID + Null terminator */
+ *format_code = 1;
+ } else
+ *format_code = 0;
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The ADDITIONAL LENGTH field specifies the number of bytes that follow
+ * in the TransportID. The additional length shall be at least 20 and
+ * shall be a multiple of four.
+ */
+ padding = ((-len) & 3);
+ if (padding != 0)
+ len += padding;
+ /*
+ * Increment value for total payload + header length for
+ * full status descriptor
+ */
+ len += 4;
+
+ return len;
+}
+EXPORT_SYMBOL(iscsi_get_pr_transport_id_len);
+
+char *iscsi_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ char *p;
+ u32 tid_len, padding;
+ int i;
+ u16 add_len;
+ u8 format_code = (buf[0] & 0xc0);
+ /*
+ * Check for FORMAT CODE 00b or 01b from spc4r17, section 7.5.4.6:
+ *
+ * TransportID for initiator ports using SCSI over iSCSI,
+ * from Table 388 -- iSCSI TransportID formats.
+ *
+ * 00b Initiator port is identified using the world wide unique
+ * SCSI device name of the iSCSI initiator
+ * device containing the initiator port (see table 389).
+ * 01b Initiator port is identified using the world wide unique
+ * initiator port identifier (see table 390).10b to 11b
+ * Reserved
+ */
+ if ((format_code != 0x00) && (format_code != 0x40)) {
+ pr_err("Illegal format code: 0x%02x for iSCSI"
+ " Initiator Transport ID\n", format_code);
+ return NULL;
+ }
+ /*
+ * If the caller wants the TransportID Length, we set that value for the
+ * entire iSCSI Tarnsport ID now.
+ */
+ if (out_tid_len != NULL) {
+ add_len = ((buf[2] >> 8) & 0xff);
+ add_len |= (buf[3] & 0xff);
+
+ tid_len = strlen(&buf[4]);
+ tid_len += 4; /* Add four bytes for iSCSI Transport ID header */
+ tid_len += 1; /* Add one byte for NULL terminator */
+ padding = ((-tid_len) & 3);
+ if (padding != 0)
+ tid_len += padding;
+
+ if ((add_len + 4) != tid_len) {
+ pr_debug("LIO-Target Extracted add_len: %hu "
+ "does not match calculated tid_len: %u,"
+ " using tid_len instead\n", add_len+4, tid_len);
+ *out_tid_len = tid_len;
+ } else
+ *out_tid_len = (add_len + 4);
+ }
+ /*
+ * Check for ',i,0x' seperator between iSCSI Name and iSCSI Initiator
+ * Session ID as defined in Table 390 - iSCSI initiator port TransportID
+ * format.
+ */
+ if (format_code == 0x40) {
+ p = strstr(&buf[4], ",i,0x");
+ if (!p) {
+ pr_err("Unable to locate \",i,0x\" seperator"
+ " for Initiator port identifier: %s\n",
+ &buf[4]);
+ return NULL;
+ }
+ *p = '\0'; /* Terminate iSCSI Name */
+ p += 5; /* Skip over ",i,0x" seperator */
+
+ *port_nexus_ptr = p;
+ /*
+ * Go ahead and do the lower case conversion of the received
+ * 12 ASCII characters representing the ISID in the TransportID
+ * for comparison against the running iSCSI session's ISID from
+ * iscsi_target.c:lio_sess_get_initiator_sid()
+ */
+ for (i = 0; i < 12; i++) {
+ if (isdigit(*p)) {
+ p++;
+ continue;
+ }
+ *p = tolower(*p);
+ p++;
+ }
+ }
+
+ return (char *)&buf[4];
+}
+EXPORT_SYMBOL(iscsi_parse_pr_out_transport_id);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.c
new file mode 100644
index 0000000..f44459a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.c
@@ -0,0 +1,658 @@
+/*******************************************************************************
+ * Filename: target_core_file.c
+ *
+ * This file contains the Storage Engine <-> FILEIO transport specific functions
+ *
+ * Copyright (c) 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+
+#include "target_core_file.h"
+
+static struct se_subsystem_api fileio_template;
+
+/* fd_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int fd_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct fd_host *fd_host;
+
+ fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL);
+ if (!fd_host) {
+ pr_err("Unable to allocate memory for struct fd_host\n");
+ return -ENOMEM;
+ }
+
+ fd_host->fd_host_id = host_id;
+
+ hba->hba_ptr = fd_host;
+
+ pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic"
+ " Target Core Stack %s\n", hba->hba_id, FD_VERSION,
+ TARGET_CORE_MOD_VERSION);
+ pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic"
+ " MaxSectors: %u\n",
+ hba->hba_id, fd_host->fd_host_id, FD_MAX_SECTORS);
+
+ return 0;
+}
+
+static void fd_detach_hba(struct se_hba *hba)
+{
+ struct fd_host *fd_host = hba->hba_ptr;
+
+ pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic"
+ " Target Core\n", hba->hba_id, fd_host->fd_host_id);
+
+ kfree(fd_host);
+ hba->hba_ptr = NULL;
+}
+
+static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct fd_dev *fd_dev;
+ struct fd_host *fd_host = hba->hba_ptr;
+
+ fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL);
+ if (!fd_dev) {
+ pr_err("Unable to allocate memory for struct fd_dev\n");
+ return NULL;
+ }
+
+ fd_dev->fd_host = fd_host;
+
+ pr_debug("FILEIO: Allocated fd_dev for %p\n", name);
+
+ return fd_dev;
+}
+
+/* fd_create_virtdevice(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static struct se_device *fd_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ char *dev_p = NULL;
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct queue_limits *limits;
+ struct fd_dev *fd_dev = p;
+ struct fd_host *fd_host = hba->hba_ptr;
+ mm_segment_t old_fs;
+ struct file *file;
+ struct inode *inode = NULL;
+ int dev_flags = 0, flags, ret = -EINVAL;
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ dev_p = getname(fd_dev->fd_dev_name);
+ set_fs(old_fs);
+
+ if (IS_ERR(dev_p)) {
+ pr_err("getname(%s) failed: %lu\n",
+ fd_dev->fd_dev_name, IS_ERR(dev_p));
+ ret = PTR_ERR(dev_p);
+ goto fail;
+ }
+ /*
+ * Use O_DSYNC by default instead of O_SYNC to forgo syncing
+ * of pure timestamp updates.
+ */
+ flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC;
+ /*
+ * Optionally allow fd_buffered_io=1 to be enabled for people
+ * who want use the fs buffer cache as an WriteCache mechanism.
+ *
+ * This means that in event of a hard failure, there is a risk
+ * of silent data-loss if the SCSI client has *not* performed a
+ * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE
+ * to write-out the entire device cache.
+ */
+ if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) {
+ pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n");
+ flags &= ~O_DSYNC;
+ }
+
+ file = filp_open(dev_p, flags, 0600);
+ if (IS_ERR(file)) {
+ pr_err("filp_open(%s) failed\n", dev_p);
+ ret = PTR_ERR(file);
+ goto fail;
+ }
+ if (!file || !file->f_dentry) {
+ pr_err("filp_open(%s) failed\n", dev_p);
+ goto fail;
+ }
+ fd_dev->fd_file = file;
+ /*
+ * If using a block backend with this struct file, we extract
+ * fd_dev->fd_[block,dev]_size from struct block_device.
+ *
+ * Otherwise, we use the passed fd_size= from configfs
+ */
+ inode = file->f_mapping->host;
+ if (S_ISBLK(inode->i_mode)) {
+ struct request_queue *q;
+ unsigned long long dev_size;
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = bdev_get_queue(inode->i_bdev);
+ limits = &dev_limits.limits;
+ limits->logical_block_size = bdev_logical_block_size(inode->i_bdev);
+ limits->max_hw_sectors = queue_max_hw_sectors(q);
+ limits->max_sectors = queue_max_sectors(q);
+ /*
+ * Determine the number of bytes from i_size_read() minus
+ * one (1) logical sector from underlying struct block_device
+ */
+ fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
+ dev_size = (i_size_read(file->f_mapping->host) -
+ fd_dev->fd_block_size);
+
+ pr_debug("FILEIO: Using size: %llu bytes from struct"
+ " block_device blocks: %llu logical_block_size: %d\n",
+ dev_size, div_u64(dev_size, fd_dev->fd_block_size),
+ fd_dev->fd_block_size);
+ } else {
+ if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
+ pr_err("FILEIO: Missing fd_dev_size="
+ " parameter, and no backing struct"
+ " block_device\n");
+ goto fail;
+ }
+
+ limits = &dev_limits.limits;
+ limits->logical_block_size = FD_BLOCKSIZE;
+ limits->max_hw_sectors = FD_MAX_SECTORS;
+ limits->max_sectors = FD_MAX_SECTORS;
+ fd_dev->fd_block_size = FD_BLOCKSIZE;
+ }
+
+ dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
+ dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH;
+
+ dev = transport_add_device_to_core_hba(hba, &fileio_template,
+ se_dev, dev_flags, fd_dev,
+ &dev_limits, "FILEIO", FD_VERSION);
+ if (!dev)
+ goto fail;
+
+ if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) {
+ pr_debug("FILEIO: Forcing setting of emulate_write_cache=1"
+ " with FDBD_HAS_BUFFERED_IO_WCE\n");
+ dev->se_sub_dev->se_dev_attrib.emulate_write_cache = 1;
+ }
+
+ fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++;
+ fd_dev->fd_queue_depth = dev->queue_depth;
+
+ pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s,"
+ " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id,
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size);
+
+ putname(dev_p);
+ return dev;
+fail:
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+ putname(dev_p);
+ return ERR_PTR(ret);
+}
+
+/* fd_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void fd_free_device(void *p)
+{
+ struct fd_dev *fd_dev = p;
+
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+
+ kfree(fd_dev);
+}
+
+static inline struct fd_request *FILE_REQ(struct se_task *task)
+{
+ return container_of(task, struct fd_request, fd_task);
+}
+
+
+static struct se_task *
+fd_alloc_task(unsigned char *cdb)
+{
+ struct fd_request *fd_req;
+
+ fd_req = kzalloc(sizeof(struct fd_request), GFP_KERNEL);
+ if (!fd_req) {
+ pr_err("Unable to allocate struct fd_request\n");
+ return NULL;
+ }
+
+ return &fd_req->fd_task;
+}
+
+static int fd_do_readv(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+ struct se_device *se_dev = req->fd_task.task_se_cmd->se_dev;
+ struct fd_dev *dev = se_dev->dev_ptr;
+ struct file *fd = dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ mm_segment_t old_fs;
+ loff_t pos = (task->task_lba *
+ se_dev->se_sub_dev->se_dev_attrib.block_size);
+ int ret = 0, i;
+
+ iov = kzalloc(sizeof(struct iovec) * task->task_sg_nents, GFP_KERNEL);
+ if (!iov) {
+ pr_err("Unable to allocate fd_do_readv iov[]\n");
+ return -ENOMEM;
+ }
+
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+ iov[i].iov_len = sg->length;
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_readv(fd, &iov[0], task->task_sg_nents, &pos);
+ set_fs(old_fs);
+
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, i)
+ kunmap(sg_page(sg));
+ kfree(iov);
+ /*
+ * Return zeros and GOOD status even if the READ did not return
+ * the expected virt_size for struct file w/o a backing struct
+ * block_device.
+ */
+ if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+ if (ret < 0 || ret != task->task_size) {
+ pr_err("vfs_readv() returned %d,"
+ " expecting %d for S_ISBLK\n", ret,
+ (int)task->task_size);
+ return (ret < 0 ? ret : -EINVAL);
+ }
+ } else {
+ if (ret < 0) {
+ pr_err("vfs_readv() returned %d for non"
+ " S_ISBLK\n", ret);
+ return ret;
+ }
+ }
+
+ return 1;
+}
+
+static int fd_do_writev(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+ struct se_device *se_dev = req->fd_task.task_se_cmd->se_dev;
+ struct fd_dev *dev = se_dev->dev_ptr;
+ struct file *fd = dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ mm_segment_t old_fs;
+ loff_t pos = (task->task_lba *
+ se_dev->se_sub_dev->se_dev_attrib.block_size);
+ int ret, i = 0;
+
+ iov = kzalloc(sizeof(struct iovec) * task->task_sg_nents, GFP_KERNEL);
+ if (!iov) {
+ pr_err("Unable to allocate fd_do_writev iov[]\n");
+ return -ENOMEM;
+ }
+
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+ iov[i].iov_len = sg->length;
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(fd, &iov[0], task->task_sg_nents, &pos);
+ set_fs(old_fs);
+
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, i)
+ kunmap(sg_page(sg));
+
+ kfree(iov);
+
+ if (ret < 0 || ret != task->task_size) {
+ pr_err("vfs_writev() returned %d\n", ret);
+ return (ret < 0 ? ret : -EINVAL);
+ }
+
+ return 1;
+}
+
+static void fd_emulate_sync_cache(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ int immed = (cmd->t_task_cdb[1] & 0x2);
+ loff_t start, end;
+ int ret;
+
+ /*
+ * If the Immediate bit is set, queue up the GOOD response
+ * for this SYNCHRONIZE_CACHE op
+ */
+ if (immed)
+ transport_complete_sync_cache(cmd, 1);
+
+ /*
+ * Determine if we will be flushing the entire device.
+ */
+ if (cmd->t_task_lba == 0 && cmd->data_length == 0) {
+ start = 0;
+ end = LLONG_MAX;
+ } else {
+ start = cmd->t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+ if (cmd->data_length)
+ end = start + cmd->data_length;
+ else
+ end = LLONG_MAX;
+ }
+
+ ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
+ if (ret != 0)
+ pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret);
+
+ if (!immed)
+ transport_complete_sync_cache(cmd, ret == 0);
+}
+
+static int fd_do_task(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ int ret = 0;
+
+ /*
+ * Call vectorized fileio functions to map struct scatterlist
+ * physical memory addresses to struct iovec virtual memory.
+ */
+ if (task->task_data_direction == DMA_FROM_DEVICE) {
+ ret = fd_do_readv(task);
+ } else {
+ ret = fd_do_writev(task);
+ /*
+ * Perform implict vfs_fsync_range() for fd_do_writev() ops
+ * for SCSI WRITEs with Forced Unit Access (FUA) set.
+ * Allow this to happen independent of WCE=0 setting.
+ */
+ if (ret > 0 &&
+ dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
+ (cmd->se_cmd_flags & SCF_FUA)) {
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ loff_t start = task->task_lba *
+ dev->se_sub_dev->se_dev_attrib.block_size;
+ loff_t end = start + task->task_size;
+
+ vfs_fsync_range(fd_dev->fd_file, start, end, 1);
+ }
+ }
+
+ if (ret < 0) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return ret;
+ }
+ if (ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return 0;
+}
+
+/* fd_free_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void fd_free_task(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+
+ kfree(req);
+}
+
+enum {
+ Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_fd_dev_name, "fd_dev_name=%s"},
+ {Opt_fd_dev_size, "fd_dev_size=%s"},
+ {Opt_fd_buffered_io, "fd_buffered_io=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t fd_set_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page, ssize_t count)
+{
+ struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *arg_p, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_fd_dev_name:
+ arg_p = match_strdup(&args[0]);
+ if (!arg_p) {
+ ret = -ENOMEM;
+ break;
+ }
+ snprintf(fd_dev->fd_dev_name, FD_MAX_DEV_NAME,
+ "%s", arg_p);
+ kfree(arg_p);
+ pr_debug("FILEIO: Referencing Path: %s\n",
+ fd_dev->fd_dev_name);
+ fd_dev->fbd_flags |= FBDF_HAS_PATH;
+ break;
+ case Opt_fd_dev_size:
+ arg_p = match_strdup(&args[0]);
+ if (!arg_p) {
+ ret = -ENOMEM;
+ break;
+ }
+ ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size);
+ kfree(arg_p);
+ if (ret < 0) {
+ pr_err("strict_strtoull() failed for"
+ " fd_dev_size=\n");
+ goto out;
+ }
+ pr_debug("FILEIO: Referencing Size: %llu"
+ " bytes\n", fd_dev->fd_dev_size);
+ fd_dev->fbd_flags |= FBDF_HAS_SIZE;
+ break;
+ case Opt_fd_buffered_io:
+ match_int(args, &arg);
+ if (arg != 1) {
+ pr_err("bogus fd_buffered_io=%d value\n", arg);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pr_debug("FILEIO: Using buffered I/O"
+ " operations for struct fd_dev\n");
+
+ fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE;
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+{
+ struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+
+ if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
+ pr_err("Missing fd_dev_name=\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static ssize_t fd_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+ ssize_t bl = 0;
+
+ bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id);
+ bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n",
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size,
+ (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ?
+ "Buffered-WCE" : "O_DSYNC");
+ return bl;
+}
+
+/* fd_get_device_rev(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static u32 fd_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+/* fd_get_device_type(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static u32 fd_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t fd_get_blocks(struct se_device *dev)
+{
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ struct file *f = fd_dev->fd_file;
+ struct inode *i = f->f_mapping->host;
+ unsigned long long dev_size;
+ /*
+ * When using a file that references an underlying struct block_device,
+ * ensure dev_size is always based on the current inode size in order
+ * to handle underlying block_device resize operations.
+ */
+ if (S_ISBLK(i->i_mode))
+ dev_size = (i_size_read(i) - fd_dev->fd_block_size);
+ else
+ dev_size = fd_dev->fd_dev_size;
+
+ return div_u64(dev_size, dev->se_sub_dev->se_dev_attrib.block_size);
+}
+
+static struct se_subsystem_api fileio_template = {
+ .name = "fileio",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
+ .write_cache_emulated = 1,
+ .fua_write_emulated = 1,
+ .attach_hba = fd_attach_hba,
+ .detach_hba = fd_detach_hba,
+ .allocate_virtdevice = fd_allocate_virtdevice,
+ .create_virtdevice = fd_create_virtdevice,
+ .free_device = fd_free_device,
+ .alloc_task = fd_alloc_task,
+ .do_task = fd_do_task,
+ .do_sync_cache = fd_emulate_sync_cache,
+ .free_task = fd_free_task,
+ .check_configfs_dev_params = fd_check_configfs_dev_params,
+ .set_configfs_dev_params = fd_set_configfs_dev_params,
+ .show_configfs_dev_params = fd_show_configfs_dev_params,
+ .get_device_rev = fd_get_device_rev,
+ .get_device_type = fd_get_device_type,
+ .get_blocks = fd_get_blocks,
+};
+
+static int __init fileio_module_init(void)
+{
+ return transport_subsystem_register(&fileio_template);
+}
+
+static void fileio_module_exit(void)
+{
+ transport_subsystem_release(&fileio_template);
+}
+
+MODULE_DESCRIPTION("TCM FILEIO subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(fileio_module_init);
+module_exit(fileio_module_exit);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.h
new file mode 100644
index 0000000..6b1b6a9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_file.h
@@ -0,0 +1,44 @@
+#ifndef TARGET_CORE_FILE_H
+#define TARGET_CORE_FILE_H
+
+#define FD_VERSION "4.0"
+
+#define FD_MAX_DEV_NAME 256
+#define FD_DEVICE_QUEUE_DEPTH 32
+#define FD_MAX_DEVICE_QUEUE_DEPTH 128
+#define FD_BLOCKSIZE 512
+#define FD_MAX_SECTORS 1024
+
+#define RRF_EMULATE_CDB 0x01
+#define RRF_GOT_LBA 0x02
+
+struct fd_request {
+ struct se_task fd_task;
+};
+
+#define FBDF_HAS_PATH 0x01
+#define FBDF_HAS_SIZE 0x02
+#define FDBD_HAS_BUFFERED_IO_WCE 0x04
+
+struct fd_dev {
+ u32 fbd_flags;
+ unsigned char fd_dev_name[FD_MAX_DEV_NAME];
+ /* Unique Ramdisk Device ID in Ramdisk HBA */
+ u32 fd_dev_id;
+ /* Number of SG tables in sg_table_array */
+ u32 fd_table_count;
+ u32 fd_queue_depth;
+ u32 fd_block_size;
+ unsigned long long fd_dev_size;
+ struct file *fd_file;
+ /* FILEIO HBA device is connected to */
+ struct fd_host *fd_host;
+} ____cacheline_aligned;
+
+struct fd_host {
+ u32 fd_host_dev_id_count;
+ /* Unique FILEIO Host ID */
+ u32 fd_host_id;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_FILE_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_hba.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_hba.c
new file mode 100644
index 0000000..3dd1bd4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_hba.c
@@ -0,0 +1,173 @@
+/*******************************************************************************
+ * Filename: target_core_hba.c
+ *
+ * This file contains the TCM HBA Transport related functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/in.h>
+#include <linux/module.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+
+#include "target_core_internal.h"
+
+static LIST_HEAD(subsystem_list);
+static DEFINE_MUTEX(subsystem_mutex);
+
+static u32 hba_id_counter;
+
+static DEFINE_SPINLOCK(hba_lock);
+static LIST_HEAD(hba_list);
+
+int transport_subsystem_register(struct se_subsystem_api *sub_api)
+{
+ struct se_subsystem_api *s;
+
+ INIT_LIST_HEAD(&sub_api->sub_api_list);
+
+ mutex_lock(&subsystem_mutex);
+ list_for_each_entry(s, &subsystem_list, sub_api_list) {
+ if (!strcmp(s->name, sub_api->name)) {
+ pr_err("%p is already registered with"
+ " duplicate name %s, unable to process"
+ " request\n", s, s->name);
+ mutex_unlock(&subsystem_mutex);
+ return -EEXIST;
+ }
+ }
+ list_add_tail(&sub_api->sub_api_list, &subsystem_list);
+ mutex_unlock(&subsystem_mutex);
+
+ pr_debug("TCM: Registered subsystem plugin: %s struct module:"
+ " %p\n", sub_api->name, sub_api->owner);
+ return 0;
+}
+EXPORT_SYMBOL(transport_subsystem_register);
+
+void transport_subsystem_release(struct se_subsystem_api *sub_api)
+{
+ mutex_lock(&subsystem_mutex);
+ list_del(&sub_api->sub_api_list);
+ mutex_unlock(&subsystem_mutex);
+}
+EXPORT_SYMBOL(transport_subsystem_release);
+
+static struct se_subsystem_api *core_get_backend(const char *sub_name)
+{
+ struct se_subsystem_api *s;
+
+ mutex_lock(&subsystem_mutex);
+ list_for_each_entry(s, &subsystem_list, sub_api_list) {
+ if (!strcmp(s->name, sub_name))
+ goto found;
+ }
+ mutex_unlock(&subsystem_mutex);
+ return NULL;
+found:
+ if (s->owner && !try_module_get(s->owner))
+ s = NULL;
+ mutex_unlock(&subsystem_mutex);
+ return s;
+}
+
+struct se_hba *
+core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
+{
+ struct se_hba *hba;
+ int ret = 0;
+
+ hba = kzalloc(sizeof(*hba), GFP_KERNEL);
+ if (!hba) {
+ pr_err("Unable to allocate struct se_hba\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&hba->hba_dev_list);
+ spin_lock_init(&hba->device_lock);
+ mutex_init(&hba->hba_access_mutex);
+
+ hba->hba_index = scsi_get_new_index(SCSI_INST_INDEX);
+ hba->hba_flags |= hba_flags;
+
+ hba->transport = core_get_backend(plugin_name);
+ if (!hba->transport) {
+ ret = -EINVAL;
+ goto out_free_hba;
+ }
+
+ ret = hba->transport->attach_hba(hba, plugin_dep_id);
+ if (ret < 0)
+ goto out_module_put;
+
+ spin_lock(&hba_lock);
+ hba->hba_id = hba_id_counter++;
+ list_add_tail(&hba->hba_node, &hba_list);
+ spin_unlock(&hba_lock);
+
+ pr_debug("CORE_HBA[%d] - Attached HBA to Generic Target"
+ " Core\n", hba->hba_id);
+
+ return hba;
+
+out_module_put:
+ if (hba->transport->owner)
+ module_put(hba->transport->owner);
+ hba->transport = NULL;
+out_free_hba:
+ kfree(hba);
+ return ERR_PTR(ret);
+}
+
+int
+core_delete_hba(struct se_hba *hba)
+{
+ if (!list_empty(&hba->hba_dev_list))
+ dump_stack();
+
+ hba->transport->detach_hba(hba);
+
+ spin_lock(&hba_lock);
+ list_del(&hba->hba_node);
+ spin_unlock(&hba_lock);
+
+ pr_debug("CORE_HBA[%d] - Detached HBA from Generic Target"
+ " Core\n", hba->hba_id);
+
+ if (hba->transport->owner)
+ module_put(hba->transport->owner);
+
+ hba->transport = NULL;
+ kfree(hba);
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.c
new file mode 100644
index 0000000..2ec299e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.c
@@ -0,0 +1,694 @@
+/*******************************************************************************
+ * Filename: target_core_iblock.c
+ *
+ * This file contains the Storage Engine <-> Linux BlockIO transport
+ * specific functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/bio.h>
+#include <linux/genhd.h>
+#include <linux/file.h>
+#include <linux/module.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+
+#include "target_core_iblock.h"
+
+#define IBLOCK_MAX_BIO_PER_TASK 32 /* max # of bios to submit at a time */
+#define IBLOCK_BIO_POOL_SIZE 128
+
+static struct se_subsystem_api iblock_template;
+
+static void iblock_bio_done(struct bio *, int);
+
+/* iblock_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int iblock_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ pr_debug("CORE_HBA[%d] - TCM iBlock HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ IBLOCK_VERSION, TARGET_CORE_MOD_VERSION);
+ return 0;
+}
+
+static void iblock_detach_hba(struct se_hba *hba)
+{
+}
+
+static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct iblock_dev *ib_dev = NULL;
+
+ ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL);
+ if (!ib_dev) {
+ pr_err("Unable to allocate struct iblock_dev\n");
+ return NULL;
+ }
+
+ pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name);
+
+ return ib_dev;
+}
+
+static struct se_device *iblock_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ struct iblock_dev *ib_dev = p;
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct block_device *bd = NULL;
+ struct request_queue *q;
+ struct queue_limits *limits;
+ u32 dev_flags = 0;
+ int ret = -EINVAL;
+
+ if (!ib_dev) {
+ pr_err("Unable to locate struct iblock_dev parameter\n");
+ return ERR_PTR(ret);
+ }
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ ib_dev->ibd_bio_set = bioset_create(IBLOCK_BIO_POOL_SIZE, 0);
+ if (!ib_dev->ibd_bio_set) {
+ pr_err("IBLOCK: Unable to create bioset()\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ pr_debug("IBLOCK: Created bio_set()\n");
+ /*
+ * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path
+ * must already have been set in order for echo 1 > $HBA/$DEV/enable to run.
+ */
+ pr_debug( "IBLOCK: Claiming struct block_device: %s\n",
+ ib_dev->ibd_udev_path);
+
+ bd = blkdev_get_by_path(ib_dev->ibd_udev_path,
+ FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev);
+ if (IS_ERR(bd)) {
+ ret = PTR_ERR(bd);
+ goto failed;
+ }
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = bdev_get_queue(bd);
+ limits = &dev_limits.limits;
+ limits->logical_block_size = bdev_logical_block_size(bd);
+ limits->max_hw_sectors = UINT_MAX;
+ limits->max_sectors = UINT_MAX;
+ dev_limits.hw_queue_depth = q->nr_requests;
+ dev_limits.queue_depth = q->nr_requests;
+
+ ib_dev->ibd_bd = bd;
+
+ dev = transport_add_device_to_core_hba(hba,
+ &iblock_template, se_dev, dev_flags, ib_dev,
+ &dev_limits, "IBLOCK", IBLOCK_VERSION);
+ if (!dev)
+ goto failed;
+
+ /*
+ * Check if the underlying struct block_device request_queue supports
+ * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
+ * in ATA and we need to set TPE=1
+ */
+ if (blk_queue_discard(q)) {
+ dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count =
+ q->limits.max_discard_sectors;
+ /*
+ * Currently hardcoded to 1 in Linux/SCSI code..
+ */
+ dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1;
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity =
+ q->limits.discard_granularity >> 9;
+ dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
+ q->limits.discard_alignment;
+
+ pr_debug("IBLOCK: BLOCK Discard support available,"
+ " disabled by default\n");
+ }
+
+ if (blk_queue_nonrot(q))
+ dev->se_sub_dev->se_dev_attrib.is_nonrot = 1;
+
+ return dev;
+
+failed:
+ if (ib_dev->ibd_bio_set) {
+ bioset_free(ib_dev->ibd_bio_set);
+ ib_dev->ibd_bio_set = NULL;
+ }
+ ib_dev->ibd_bd = NULL;
+ return ERR_PTR(ret);
+}
+
+static void iblock_free_device(void *p)
+{
+ struct iblock_dev *ib_dev = p;
+
+ if (ib_dev->ibd_bd != NULL)
+ blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+ if (ib_dev->ibd_bio_set != NULL)
+ bioset_free(ib_dev->ibd_bio_set);
+ kfree(ib_dev);
+}
+
+static inline struct iblock_req *IBLOCK_REQ(struct se_task *task)
+{
+ return container_of(task, struct iblock_req, ib_task);
+}
+
+static struct se_task *
+iblock_alloc_task(unsigned char *cdb)
+{
+ struct iblock_req *ib_req;
+
+ ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
+ if (!ib_req) {
+ pr_err("Unable to allocate memory for struct iblock_req\n");
+ return NULL;
+ }
+
+ atomic_set(&ib_req->pending, 1);
+ return &ib_req->ib_task;
+}
+
+static unsigned long long iblock_emulate_read_cap_with_block_size(
+ struct se_device *dev,
+ struct block_device *bd,
+ struct request_queue *q)
+{
+ unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode),
+ bdev_logical_block_size(bd)) - 1);
+ u32 block_size = bdev_logical_block_size(bd);
+
+ if (block_size == dev->se_sub_dev->se_dev_attrib.block_size)
+ return blocks_long;
+
+ switch (block_size) {
+ case 4096:
+ switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+ case 2048:
+ blocks_long <<= 1;
+ break;
+ case 1024:
+ blocks_long <<= 2;
+ break;
+ case 512:
+ blocks_long <<= 3;
+ default:
+ break;
+ }
+ break;
+ case 2048:
+ switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+ case 4096:
+ blocks_long >>= 1;
+ break;
+ case 1024:
+ blocks_long <<= 1;
+ break;
+ case 512:
+ blocks_long <<= 2;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 1024:
+ switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+ case 4096:
+ blocks_long >>= 2;
+ break;
+ case 2048:
+ blocks_long >>= 1;
+ break;
+ case 512:
+ blocks_long <<= 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 512:
+ switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+ case 4096:
+ blocks_long >>= 3;
+ break;
+ case 2048:
+ blocks_long >>= 2;
+ break;
+ case 1024:
+ blocks_long >>= 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return blocks_long;
+}
+
+static void iblock_end_io_flush(struct bio *bio, int err)
+{
+ struct se_cmd *cmd = bio->bi_private;
+
+ if (err)
+ pr_err("IBLOCK: cache flush failed: %d\n", err);
+
+ if (cmd)
+ transport_complete_sync_cache(cmd, err == 0);
+ bio_put(bio);
+}
+
+/*
+ * Implement SYCHRONIZE CACHE. Note that we can't handle lba ranges and must
+ * always flush the whole cache.
+ */
+static void iblock_emulate_sync_cache(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
+ int immed = (cmd->t_task_cdb[1] & 0x2);
+ struct bio *bio;
+
+ /*
+ * If the Immediate bit is set, queue up the GOOD response
+ * for this SYNCHRONIZE_CACHE op.
+ */
+ if (immed)
+ transport_complete_sync_cache(cmd, 1);
+
+ bio = bio_alloc(GFP_KERNEL, 0);
+ bio->bi_end_io = iblock_end_io_flush;
+ bio->bi_bdev = ib_dev->ibd_bd;
+ if (!immed)
+ bio->bi_private = cmd;
+ submit_bio(WRITE_FLUSH, bio);
+}
+
+static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range)
+{
+ struct iblock_dev *ibd = dev->dev_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ int barrier = 0;
+
+ return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier);
+}
+
+static void iblock_free_task(struct se_task *task)
+{
+ kfree(IBLOCK_REQ(task));
+}
+
+enum {
+ Opt_udev_path, Opt_force, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_udev_path, "udev_path=%s"},
+ {Opt_force, "force=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page, ssize_t count)
+{
+ struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *arg_p, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_udev_path:
+ if (ib_dev->ibd_bd) {
+ pr_err("Unable to set udev_path= while"
+ " ib_dev->ibd_bd exists\n");
+ ret = -EEXIST;
+ goto out;
+ }
+ arg_p = match_strdup(&args[0]);
+ if (!arg_p) {
+ ret = -ENOMEM;
+ break;
+ }
+ snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN,
+ "%s", arg_p);
+ kfree(arg_p);
+ pr_debug("IBLOCK: Referencing UDEV path: %s\n",
+ ib_dev->ibd_udev_path);
+ ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH;
+ break;
+ case Opt_force:
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t iblock_check_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev)
+{
+ struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
+
+ if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) {
+ pr_err("Missing udev_path= parameters for IBLOCK\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static ssize_t iblock_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ char buf[BDEVNAME_SIZE];
+ ssize_t bl = 0;
+
+ if (bd)
+ bl += sprintf(b + bl, "iBlock device: %s",
+ bdevname(bd, buf));
+ if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) {
+ bl += sprintf(b + bl, " UDEV PATH: %s\n",
+ ibd->ibd_udev_path);
+ } else
+ bl += sprintf(b + bl, "\n");
+
+ bl += sprintf(b + bl, " ");
+ if (bd) {
+ bl += sprintf(b + bl, "Major: %d Minor: %d %s\n",
+ MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ?
+ "" : (bd->bd_holder == ibd) ?
+ "CLAIMED: IBLOCK" : "CLAIMED: OS");
+ } else {
+ bl += sprintf(b + bl, "Major: 0 Minor: 0\n");
+ }
+
+ return bl;
+}
+
+static void iblock_bio_destructor(struct bio *bio)
+{
+ struct se_task *task = bio->bi_private;
+ struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr;
+
+ bio_free(bio, ib_dev->ibd_bio_set);
+}
+
+static struct bio *
+iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num)
+{
+ struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr;
+ struct iblock_req *ib_req = IBLOCK_REQ(task);
+ struct bio *bio;
+
+ /*
+ * Only allocate as many vector entries as the bio code allows us to,
+ * we'll loop later on until we have handled the whole request.
+ */
+ if (sg_num > BIO_MAX_PAGES)
+ sg_num = BIO_MAX_PAGES;
+
+ bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);
+ if (!bio) {
+ pr_err("Unable to allocate memory for bio\n");
+ return NULL;
+ }
+
+ pr_debug("Allocated bio: %p task_sg_nents: %u using ibd_bio_set:"
+ " %p\n", bio, task->task_sg_nents, ib_dev->ibd_bio_set);
+ pr_debug("Allocated bio: %p task_size: %u\n", bio, task->task_size);
+
+ bio->bi_bdev = ib_dev->ibd_bd;
+ bio->bi_private = task;
+ bio->bi_destructor = iblock_bio_destructor;
+ bio->bi_end_io = &iblock_bio_done;
+ bio->bi_sector = lba;
+ atomic_inc(&ib_req->pending);
+
+ pr_debug("Set bio->bi_sector: %llu\n", (unsigned long long)bio->bi_sector);
+ pr_debug("Set ib_req->pending: %d\n", atomic_read(&ib_req->pending));
+ return bio;
+}
+
+static void iblock_submit_bios(struct bio_list *list, int rw)
+{
+ struct blk_plug plug;
+ struct bio *bio;
+
+ blk_start_plug(&plug);
+ while ((bio = bio_list_pop(list)))
+ submit_bio(rw, bio);
+ blk_finish_plug(&plug);
+}
+
+static int iblock_do_task(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct iblock_req *ibr = IBLOCK_REQ(task);
+ struct bio *bio;
+ struct bio_list list;
+ struct scatterlist *sg;
+ u32 i, sg_num = task->task_sg_nents;
+ sector_t block_lba;
+ unsigned bio_cnt;
+ int rw;
+
+ if (task->task_data_direction == DMA_TO_DEVICE) {
+ /*
+ * Force data to disk if we pretend to not have a volatile
+ * write cache, or the initiator set the Force Unit Access bit.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 ||
+ (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
+ (cmd->se_cmd_flags & SCF_FUA)))
+ rw = WRITE_FUA;
+ else
+ rw = WRITE;
+ } else {
+ rw = READ;
+ }
+
+ /*
+ * Do starting conversion up from non 512-byte blocksize with
+ * struct se_task SCSI blocksize into Linux/Block 512 units for BIO.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.block_size == 4096)
+ block_lba = (task->task_lba << 3);
+ else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048)
+ block_lba = (task->task_lba << 2);
+ else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024)
+ block_lba = (task->task_lba << 1);
+ else if (dev->se_sub_dev->se_dev_attrib.block_size == 512)
+ block_lba = task->task_lba;
+ else {
+ pr_err("Unsupported SCSI -> BLOCK LBA conversion:"
+ " %u\n", dev->se_sub_dev->se_dev_attrib.block_size);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOSYS;
+ }
+
+ bio = iblock_get_bio(task, block_lba, sg_num);
+ if (!bio) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+ }
+
+ bio_list_init(&list);
+ bio_list_add(&list, bio);
+ bio_cnt = 1;
+
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+ /*
+ * XXX: if the length the device accepts is shorter than the
+ * length of the S/G list entry this will cause and
+ * endless loop. Better hope no driver uses huge pages.
+ */
+ while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset)
+ != sg->length) {
+ if (bio_cnt >= IBLOCK_MAX_BIO_PER_TASK) {
+ iblock_submit_bios(&list, rw);
+ bio_cnt = 0;
+ }
+
+ bio = iblock_get_bio(task, block_lba, sg_num);
+ if (!bio)
+ goto fail;
+ bio_list_add(&list, bio);
+ bio_cnt++;
+ }
+
+ /* Always in 512 byte units for Linux/Block */
+ block_lba += sg->length >> IBLOCK_LBA_SHIFT;
+ sg_num--;
+ }
+
+ iblock_submit_bios(&list, rw);
+
+ if (atomic_dec_and_test(&ibr->pending)) {
+ transport_complete_task(task,
+ !atomic_read(&ibr->ib_bio_err_cnt));
+ }
+ return 0;
+
+fail:
+ while ((bio = bio_list_pop(&list)))
+ bio_put(bio);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+}
+
+static u32 iblock_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+static u32 iblock_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t iblock_get_blocks(struct se_device *dev)
+{
+ struct iblock_dev *ibd = dev->dev_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ struct request_queue *q = bdev_get_queue(bd);
+
+ return iblock_emulate_read_cap_with_block_size(dev, bd, q);
+}
+
+static void iblock_bio_done(struct bio *bio, int err)
+{
+ struct se_task *task = bio->bi_private;
+ struct iblock_req *ibr = IBLOCK_REQ(task);
+
+ /*
+ * Set -EIO if !BIO_UPTODATE and the passed is still err=0
+ */
+ if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err)
+ err = -EIO;
+
+ if (err != 0) {
+ pr_err("test_bit(BIO_UPTODATE) failed for bio: %p,"
+ " err: %d\n", bio, err);
+ /*
+ * Bump the ib_bio_err_cnt and release bio.
+ */
+ atomic_inc(&ibr->ib_bio_err_cnt);
+ smp_mb__after_atomic_inc();
+ }
+
+ bio_put(bio);
+
+ if (!atomic_dec_and_test(&ibr->pending))
+ return;
+
+ pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n",
+ task, bio, task->task_lba,
+ (unsigned long long)bio->bi_sector, err);
+
+ transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt));
+}
+
+static struct se_subsystem_api iblock_template = {
+ .name = "iblock",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
+ .write_cache_emulated = 1,
+ .fua_write_emulated = 1,
+ .attach_hba = iblock_attach_hba,
+ .detach_hba = iblock_detach_hba,
+ .allocate_virtdevice = iblock_allocate_virtdevice,
+ .create_virtdevice = iblock_create_virtdevice,
+ .free_device = iblock_free_device,
+ .alloc_task = iblock_alloc_task,
+ .do_task = iblock_do_task,
+ .do_discard = iblock_do_discard,
+ .do_sync_cache = iblock_emulate_sync_cache,
+ .free_task = iblock_free_task,
+ .check_configfs_dev_params = iblock_check_configfs_dev_params,
+ .set_configfs_dev_params = iblock_set_configfs_dev_params,
+ .show_configfs_dev_params = iblock_show_configfs_dev_params,
+ .get_device_rev = iblock_get_device_rev,
+ .get_device_type = iblock_get_device_type,
+ .get_blocks = iblock_get_blocks,
+};
+
+static int __init iblock_module_init(void)
+{
+ return transport_subsystem_register(&iblock_template);
+}
+
+static void iblock_module_exit(void)
+{
+ transport_subsystem_release(&iblock_template);
+}
+
+MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(iblock_module_init);
+module_exit(iblock_module_exit);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.h
new file mode 100644
index 0000000..e929370
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_iblock.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_CORE_IBLOCK_H
+#define TARGET_CORE_IBLOCK_H
+
+#define IBLOCK_VERSION "4.0"
+
+#define IBLOCK_MAX_CDBS 16
+#define IBLOCK_LBA_SHIFT 9
+
+struct iblock_req {
+ struct se_task ib_task;
+ atomic_t pending;
+ atomic_t ib_bio_err_cnt;
+} ____cacheline_aligned;
+
+#define IBDF_HAS_UDEV_PATH 0x01
+
+struct iblock_dev {
+ unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
+ u32 ibd_flags;
+ struct bio_set *ibd_bio_set;
+ struct block_device *ibd_bd;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_IBLOCK_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_internal.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_internal.h
new file mode 100644
index 0000000..17179b1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_internal.h
@@ -0,0 +1,126 @@
+#ifndef TARGET_CORE_INTERNAL_H
+#define TARGET_CORE_INTERNAL_H
+
+/* target_core_alua.c */
+extern struct t10_alua_lu_gp *default_lu_gp;
+
+/* target_core_cdb.c */
+int target_emulate_inquiry(struct se_task *task);
+int target_emulate_readcapacity(struct se_task *task);
+int target_emulate_readcapacity_16(struct se_task *task);
+int target_emulate_modesense(struct se_task *task);
+int target_emulate_request_sense(struct se_task *task);
+int target_emulate_unmap(struct se_task *task);
+int target_emulate_write_same(struct se_task *task);
+int target_emulate_synchronize_cache(struct se_task *task);
+int target_emulate_noop(struct se_task *task);
+
+/* target_core_device.c */
+struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
+int core_free_device_list_for_node(struct se_node_acl *,
+ struct se_portal_group *);
+void core_dec_lacl_count(struct se_node_acl *, struct se_cmd *);
+void core_update_device_list_access(u32, u32, struct se_node_acl *);
+int core_update_device_list_for_node(struct se_lun *, struct se_lun_acl *,
+ u32, u32, struct se_node_acl *, struct se_portal_group *, int);
+void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
+int core_dev_export(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+void core_dev_unexport(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+int target_report_luns(struct se_task *);
+void se_release_device_for_hba(struct se_device *);
+void se_release_vpd_for_dev(struct se_device *);
+int se_free_virtual_device(struct se_device *, struct se_hba *);
+int se_dev_check_online(struct se_device *);
+int se_dev_check_shutdown(struct se_device *);
+void se_dev_set_default_attribs(struct se_device *, struct se_dev_limits *);
+int se_dev_set_task_timeout(struct se_device *, u32);
+int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
+int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
+int se_dev_set_unmap_granularity(struct se_device *, u32);
+int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
+int se_dev_set_emulate_dpo(struct se_device *, int);
+int se_dev_set_emulate_fua_write(struct se_device *, int);
+int se_dev_set_emulate_fua_read(struct se_device *, int);
+int se_dev_set_emulate_write_cache(struct se_device *, int);
+int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
+int se_dev_set_emulate_tas(struct se_device *, int);
+int se_dev_set_emulate_tpu(struct se_device *, int);
+int se_dev_set_emulate_tpws(struct se_device *, int);
+int se_dev_set_enforce_pr_isids(struct se_device *, int);
+int se_dev_set_is_nonrot(struct se_device *, int);
+int se_dev_set_emulate_rest_reord(struct se_device *dev, int);
+int se_dev_set_queue_depth(struct se_device *, u32);
+int se_dev_set_max_sectors(struct se_device *, u32);
+int se_dev_set_fabric_max_sectors(struct se_device *, u32);
+int se_dev_set_optimal_sectors(struct se_device *, u32);
+int se_dev_set_block_size(struct se_device *, u32);
+struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *,
+ struct se_device *, u32);
+int core_dev_del_lun(struct se_portal_group *, u32);
+struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
+struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_node_acl *, u32, int *);
+int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *, u32, u32);
+int core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun *, struct se_lun_acl *);
+void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *lacl);
+int core_dev_setup_virtual_lun0(void);
+void core_dev_release_virtual_lun0(void);
+
+/* target_core_hba.c */
+struct se_hba *core_alloc_hba(const char *, u32, u32);
+int core_delete_hba(struct se_hba *);
+
+/* target_core_tmr.c */
+void core_tmr_abort_task(struct se_device *, struct se_tmr_req *,
+ struct se_session *);
+int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *,
+ struct list_head *, struct se_cmd *);
+
+/* target_core_tpg.c */
+extern struct se_device *g_lun0_dev;
+
+struct se_node_acl *__core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
+ const char *);
+struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
+ unsigned char *);
+void core_tpg_add_node_to_devs(struct se_node_acl *, struct se_portal_group *);
+void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *);
+struct se_lun *core_tpg_pre_addlun(struct se_portal_group *, u32);
+int core_tpg_post_addlun(struct se_portal_group *, struct se_lun *,
+ u32, void *);
+struct se_lun *core_tpg_pre_dellun(struct se_portal_group *, u32 unpacked_lun);
+int core_tpg_post_dellun(struct se_portal_group *, struct se_lun *);
+
+/* target_core_transport.c */
+extern struct kmem_cache *se_tmr_req_cache;
+
+int init_se_kmem_caches(void);
+void release_se_kmem_caches(void);
+u32 scsi_get_new_index(scsi_index_t);
+void transport_subsystem_check_init(void);
+void transport_cmd_finish_abort(struct se_cmd *, int);
+void __transport_remove_task_from_execute_queue(struct se_task *,
+ struct se_device *);
+unsigned char *transport_dump_cmd_direction(struct se_cmd *);
+void transport_dump_dev_state(struct se_device *, char *, int *);
+void transport_dump_dev_info(struct se_device *, struct se_lun *,
+ unsigned long long, char *, int *);
+void transport_dump_vpd_proto_id(struct t10_vpd *, unsigned char *, int);
+int transport_dump_vpd_assoc(struct t10_vpd *, unsigned char *, int);
+int transport_dump_vpd_ident_type(struct t10_vpd *, unsigned char *, int);
+int transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int);
+bool target_stop_task(struct se_task *task, unsigned long *flags);
+int transport_clear_lun_from_sessions(struct se_lun *);
+void transport_send_task_abort(struct se_cmd *);
+
+/* target_core_stat.c */
+void target_stat_setup_dev_default_groups(struct se_subsystem_dev *);
+void target_stat_setup_port_default_groups(struct se_lun *);
+void target_stat_setup_mappedlun_default_groups(struct se_lun_acl *);
+
+#endif /* TARGET_CORE_INTERNAL_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.c
new file mode 100644
index 0000000..89d10e6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.c
@@ -0,0 +1,4408 @@
+/*******************************************************************************
+ * Filename: target_core_pr.c
+ *
+ * This file contains SPC-3 compliant persistent reservations and
+ * legacy SPC-2 reservations with compatible reservation handling (CRH=1)
+ *
+ * Copyright (c) 2009, 2010 Rising Tide Systems
+ * Copyright (c) 2009, 2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <asm/unaligned.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+/*
+ * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT)
+ */
+struct pr_transport_id_holder {
+ int dest_local_nexus;
+ struct t10_pr_registration *dest_pr_reg;
+ struct se_portal_group *dest_tpg;
+ struct se_node_acl *dest_node_acl;
+ struct se_dev_entry *dest_se_deve;
+ struct list_head dest_list;
+};
+
+int core_pr_dump_initiator_port(
+ struct t10_pr_registration *pr_reg,
+ char *buf,
+ u32 size)
+{
+ if (!pr_reg->isid_present_at_reg)
+ return 0;
+
+ snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]);
+ return 1;
+}
+
+static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
+ struct t10_pr_registration *, int);
+
+static int core_scsi2_reservation_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ switch (cdb[0]) {
+ case INQUIRY:
+ case RELEASE:
+ case RELEASE_10:
+ return 0;
+ default:
+ return 1;
+ }
+
+ return 1;
+}
+
+static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ int ret;
+
+ if (!sess)
+ return 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_reserved_node_acl || !sess) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ if (dev->dev_reserved_node_acl != sess->se_node_acl) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return -EINVAL;
+ }
+ if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *,
+ struct se_node_acl *, struct se_session *);
+static void core_scsi3_put_pr_reg(struct t10_pr_registration *);
+
+static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+ struct t10_reservation *pr_tmpl = &su_dev->t10_pr;
+ int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS);
+ int conflict = 0;
+
+ if (!crh)
+ return -EINVAL;
+
+ pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
+ se_sess);
+ if (pr_reg) {
+ /*
+ * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE
+ * behavior
+ *
+ * A RESERVE(6) or RESERVE(10) command shall complete with GOOD
+ * status, but no reservation shall be established and the
+ * persistent reservation shall not be changed, if the command
+ * is received from a) and b) below.
+ *
+ * A RELEASE(6) or RELEASE(10) command shall complete with GOOD
+ * status, but the persistent reservation shall not be released,
+ * if the command is received from a) and b)
+ *
+ * a) An I_T nexus that is a persistent reservation holder; or
+ * b) An I_T nexus that is registered if a registrants only or
+ * all registrants type persistent reservation is present.
+ *
+ * In all other cases, a RESERVE(6) command, RESERVE(10) command,
+ * RELEASE(6) command, or RELEASE(10) command shall be processed
+ * as defined in SPC-2.
+ */
+ if (pr_reg->pr_res_holder) {
+ core_scsi3_put_pr_reg(pr_reg);
+ return 1;
+ }
+ if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) ||
+ (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ core_scsi3_put_pr_reg(pr_reg);
+ return 1;
+ }
+ core_scsi3_put_pr_reg(pr_reg);
+ conflict = 1;
+ } else {
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has executed a PERSISTENT RESERVE OUT
+ * command with the REGISTER or the REGISTER AND IGNORE
+ * EXISTING KEY service action and is still registered by any
+ * initiator, all RESERVE commands and all RELEASE commands
+ * regardless of initiator shall conflict and shall terminate
+ * with a RESERVATION CONFLICT status.
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1;
+ spin_unlock(&pr_tmpl->registration_lock);
+ }
+
+ if (conflict) {
+ pr_err("Received legacy SPC-2 RESERVE/RELEASE"
+ " while active SPC-3 registrations exist,"
+ " returning RESERVATION_CONFLICT\n");
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+int target_scsi2_reservation_release(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ struct se_portal_group *tpg = sess->se_tpg;
+ int ret = 0, rc;
+
+ if (!sess || !tpg)
+ goto out;
+ rc = target_check_scsi2_reservation_conflict(cmd);
+ if (rc == 1)
+ goto out;
+ else if (rc < 0) {
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = 0;
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_reserved_node_acl || !sess)
+ goto out_unlock;
+
+ if (dev->dev_reserved_node_acl != sess->se_node_acl)
+ goto out_unlock;
+
+ if (dev->dev_res_bin_isid != sess->sess_bin_isid)
+ goto out_unlock;
+
+ dev->dev_reserved_node_acl = NULL;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
+ if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
+ dev->dev_res_bin_isid = 0;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
+ }
+ pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
+ " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+
+out_unlock:
+ spin_unlock(&dev->dev_reservation_lock);
+out:
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+int target_scsi2_reservation_reserve(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ struct se_portal_group *tpg = sess->se_tpg;
+ int ret = 0, rc;
+
+ if ((cmd->t_task_cdb[1] & 0x01) &&
+ (cmd->t_task_cdb[1] & 0x02)) {
+ pr_err("LongIO and Obselete Bits set, returning"
+ " ILLEGAL_REQUEST\n");
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * This is currently the case for target_core_mod passthrough struct se_cmd
+ * ops
+ */
+ if (!sess || !tpg)
+ goto out;
+ rc = target_check_scsi2_reservation_conflict(cmd);
+ if (rc == 1)
+ goto out;
+ else if (rc < 0) {
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = 0;
+ spin_lock(&dev->dev_reservation_lock);
+ if (dev->dev_reserved_node_acl &&
+ (dev->dev_reserved_node_acl != sess->se_node_acl)) {
+ pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ pr_err("Original reserver LUN: %u %s\n",
+ cmd->se_lun->unpacked_lun,
+ dev->dev_reserved_node_acl->initiatorname);
+ pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
+ " from %s \n", cmd->se_lun->unpacked_lun,
+ cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ dev->dev_reserved_node_acl = sess->se_node_acl;
+ dev->dev_flags |= DF_SPC2_RESERVATIONS;
+ if (sess->sess_bin_isid != 0) {
+ dev->dev_res_bin_isid = sess->sess_bin_isid;
+ dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
+ }
+ pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
+ " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+
+out_unlock:
+ spin_unlock(&dev->dev_reservation_lock);
+out:
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+
+/*
+ * Begin SPC-3/SPC-4 Persistent Reservations emulation support
+ *
+ * This function is called by those initiator ports who are *NOT*
+ * the active PR reservation holder when a reservation is present.
+ */
+static int core_scsi3_pr_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ struct se_dev_entry *se_deve;
+ struct se_session *se_sess = cmd->se_sess;
+ int other_cdb = 0, ignore_reg;
+ int registered_nexus = 0, ret = 1; /* Conflict by default */
+ int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */
+ int we = 0; /* Write Exclusive */
+ int legacy = 0; /* Act like a legacy device and return
+ * RESERVATION CONFLICT on some CDBs */
+ /*
+ * A legacy SPC-2 reservation is being held.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS)
+ return core_scsi2_reservation_seq_non_holder(cmd,
+ cdb, pr_reg_type);
+
+ se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Determine if the registration should be ignored due to
+ * non-matching ISIDs in core_scsi3_pr_reservation_check().
+ */
+ ignore_reg = (pr_reg_type & 0x80000000);
+ if (ignore_reg)
+ pr_reg_type &= ~0x80000000;
+
+ switch (pr_reg_type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ /*
+ * Some commands are only allowed for the persistent reservation
+ * holder.
+ */
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ /*
+ * Some commands are only allowed for registered I_T Nexuses.
+ */
+ reg_only = 1;
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ /*
+ * Each registered I_T Nexus is a reservation holder.
+ */
+ all_reg = 1;
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ /*
+ * Referenced from spc4r17 table 45 for *NON* PR holder access
+ */
+ switch (cdb[0]) {
+ case SECURITY_PROTOCOL_IN:
+ if (registered_nexus)
+ return 0;
+ ret = (we) ? 0 : 1;
+ break;
+ case MODE_SENSE:
+ case MODE_SENSE_10:
+ case READ_ATTRIBUTE:
+ case READ_BUFFER:
+ case RECEIVE_DIAGNOSTIC:
+ if (legacy) {
+ ret = 1;
+ break;
+ }
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case PERSISTENT_RESERVE_OUT:
+ /*
+ * This follows PERSISTENT_RESERVE_OUT service actions that
+ * are allowed in the presence of various reservations.
+ * See spc4r17, table 46
+ */
+ switch (cdb[1] & 0x1f) {
+ case PRO_CLEAR:
+ case PRO_PREEMPT:
+ case PRO_PREEMPT_AND_ABORT:
+ ret = (registered_nexus) ? 0 : 1;
+ break;
+ case PRO_REGISTER:
+ case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
+ ret = 0;
+ break;
+ case PRO_REGISTER_AND_MOVE:
+ case PRO_RESERVE:
+ ret = 1;
+ break;
+ case PRO_RELEASE:
+ ret = (registered_nexus) ? 0 : 1;
+ break;
+ default:
+ pr_err("Unknown PERSISTENT_RESERVE_OUT service"
+ " action: 0x%02x\n", cdb[1] & 0x1f);
+ return -EINVAL;
+ }
+ break;
+ case RELEASE:
+ case RELEASE_10:
+ /* Handled by CRH=1 in target_scsi2_reservation_release() */
+ ret = 0;
+ break;
+ case RESERVE:
+ case RESERVE_10:
+ /* Handled by CRH=1 in target_scsi2_reservation_reserve() */
+ ret = 0;
+ break;
+ case TEST_UNIT_READY:
+ ret = (legacy) ? 1 : 0; /* Conflict for legacy */
+ break;
+ case MAINTENANCE_IN:
+ switch (cdb[1] & 0x1f) {
+ case MI_MANAGEMENT_PROTOCOL_IN:
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case MI_REPORT_SUPPORTED_OPERATION_CODES:
+ case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
+ if (legacy) {
+ ret = 1;
+ break;
+ }
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case MI_REPORT_ALIASES:
+ case MI_REPORT_IDENTIFYING_INFORMATION:
+ case MI_REPORT_PRIORITY:
+ case MI_REPORT_TARGET_PGS:
+ case MI_REPORT_TIMESTAMP:
+ ret = 0; /* Allowed */
+ break;
+ default:
+ pr_err("Unknown MI Service Action: 0x%02x\n",
+ (cdb[1] & 0x1f));
+ return -EINVAL;
+ }
+ break;
+ case ACCESS_CONTROL_IN:
+ case ACCESS_CONTROL_OUT:
+ case INQUIRY:
+ case LOG_SENSE:
+ case READ_MEDIA_SERIAL_NUMBER:
+ case REPORT_LUNS:
+ case REQUEST_SENSE:
+ case PERSISTENT_RESERVE_IN:
+ ret = 0; /*/ Allowed CDBs */
+ break;
+ default:
+ other_cdb = 1;
+ break;
+ }
+ /*
+ * Case where the CDB is explicitly allowed in the above switch
+ * statement.
+ */
+ if (!ret && !other_cdb) {
+#if 0
+ pr_debug("Allowing explict CDB: 0x%02x for %s"
+ " reservation holder\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+#endif
+ return ret;
+ }
+ /*
+ * Check if write exclusive initiator ports *NOT* holding the
+ * WRITE_EXCLUSIVE_* reservation.
+ */
+ if ((we) && !(registered_nexus)) {
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ /*
+ * Conflict for write exclusive
+ */
+ pr_debug("%s Conflict for unregistered nexus"
+ " %s CDB: 0x%02x to %s reservation\n",
+ transport_dump_cmd_direction(cmd),
+ se_sess->se_node_acl->initiatorname, cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+ return 1;
+ } else {
+ /*
+ * Allow non WRITE CDBs for all Write Exclusive
+ * PR TYPEs to pass for registered and
+ * non-registered_nexuxes NOT holding the reservation.
+ *
+ * We only make noise for the unregisterd nexuses,
+ * as we expect registered non-reservation holding
+ * nexuses to issue CDBs.
+ */
+#if 0
+ if (!registered_nexus) {
+ pr_debug("Allowing implict CDB: 0x%02x"
+ " for %s reservation on unregistered"
+ " nexus\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+ }
+#endif
+ return 0;
+ }
+ } else if ((reg_only) || (all_reg)) {
+ if (registered_nexus) {
+ /*
+ * For PR_*_REG_ONLY and PR_*_ALL_REG reservations,
+ * allow commands from registered nexuses.
+ */
+#if 0
+ pr_debug("Allowing implict CDB: 0x%02x for %s"
+ " reservation\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+#endif
+ return 0;
+ }
+ }
+ pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x"
+ " for %s reservation\n", transport_dump_cmd_direction(cmd),
+ (registered_nexus) ? "" : "un",
+ se_sess->se_node_acl->initiatorname, cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+
+ return 1; /* Conflict by default */
+}
+
+static u32 core_scsi3_pr_generation(struct se_device *dev)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ u32 prg;
+ /*
+ * PRGeneration field shall contain the value of a 32-bit wrapping
+ * counter mainted by the device server.
+ *
+ * Note that this is done regardless of Active Persist across
+ * Target PowerLoss (APTPL)
+ *
+ * See spc4r17 section 6.3.12 READ_KEYS service action
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ prg = su_dev->t10_pr.pr_generation++;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return prg;
+}
+
+static int core_scsi3_pr_reservation_check(
+ struct se_cmd *cmd,
+ u32 *pr_reg_type)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ int ret;
+
+ if (!sess)
+ return 0;
+ /*
+ * A legacy SPC-2 reservation is being held.
+ */
+ if (dev->dev_flags & DF_SPC2_RESERVATIONS)
+ return core_scsi2_reservation_check(cmd, pr_reg_type);
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_pr_res_holder) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ *pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
+ cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
+ if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return -EINVAL;
+ }
+ if (!dev->dev_pr_res_holder->isid_present_at_reg) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ ret = (dev->dev_pr_res_holder->pr_reg_bin_isid ==
+ sess->sess_bin_isid) ? 0 : -EINVAL;
+ /*
+ * Use bit in *pr_reg_type to notify ISID mismatch in
+ * core_scsi3_pr_seq_non_holder().
+ */
+ if (ret != 0)
+ *pr_reg_type |= 0x80000000;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+
+ pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC);
+ if (!pr_reg) {
+ pr_err("Unable to allocate struct t10_pr_registration\n");
+ return NULL;
+ }
+
+ pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len,
+ GFP_ATOMIC);
+ if (!pr_reg->pr_aptpl_buf) {
+ pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n");
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&pr_reg->pr_reg_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
+ atomic_set(&pr_reg->pr_res_holders, 0);
+ pr_reg->pr_reg_nacl = nacl;
+ pr_reg->pr_reg_deve = deve;
+ pr_reg->pr_res_mapped_lun = deve->mapped_lun;
+ pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun;
+ pr_reg->pr_res_key = sa_res_key;
+ pr_reg->pr_reg_all_tg_pt = all_tg_pt;
+ pr_reg->pr_reg_aptpl = aptpl;
+ pr_reg->pr_reg_tg_pt_lun = deve->se_lun;
+ /*
+ * If an ISID value for this SCSI Initiator Port exists,
+ * save it to the registration now.
+ */
+ if (isid != NULL) {
+ pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
+ snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
+ pr_reg->isid_present_at_reg = 1;
+ }
+
+ return pr_reg;
+}
+
+static int core_scsi3_lunacl_depend_item(struct se_dev_entry *);
+static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *);
+
+/*
+ * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0
+ * modes.
+ */
+static struct t10_pr_registration *__core_scsi3_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_dev_entry *deve_tmp;
+ struct se_node_acl *nacl_tmp;
+ struct se_port *port, *port_tmp;
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe;
+ int ret;
+ /*
+ * Create a registration for the I_T Nexus upon which the
+ * PROUT REGISTER was received.
+ */
+ pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!pr_reg)
+ return NULL;
+ /*
+ * Return pointer to pr_reg for ALL_TG_PT=0
+ */
+ if (!all_tg_pt)
+ return pr_reg;
+ /*
+ * Create list of matching SCSI Initiator Port registrations
+ * for ALL_TG_PT=1
+ */
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) {
+ atomic_inc(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_for_each_entry(deve_tmp, &port->sep_alua_list,
+ alua_port_list) {
+ /*
+ * This pointer will be NULL for demo mode MappedLUNs
+ * that have not been make explict via a ConfigFS
+ * MappedLUN group for the SCSI Initiator Node ACL.
+ */
+ if (!deve_tmp->se_lun_acl)
+ continue;
+
+ nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl;
+ /*
+ * Skip the matching struct se_node_acl that is allocated
+ * above..
+ */
+ if (nacl == nacl_tmp)
+ continue;
+ /*
+ * Only perform PR registrations for target ports on
+ * the same fabric module as the REGISTER w/ ALL_TG_PT=1
+ * arrived.
+ */
+ if (tfo != nacl_tmp->se_tpg->se_tpg_tfo)
+ continue;
+ /*
+ * Look for a matching Initiator Node ACL in ASCII format
+ */
+ if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname))
+ continue;
+
+ atomic_inc(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_bh(&port->sep_alua_lock);
+ /*
+ * Grab a configfs group dependency that is released
+ * for the exception path at label out: below, or upon
+ * completion of adding ALL_TG_PT=1 registrations in
+ * __core_scsi3_add_registration()
+ */
+ ret = core_scsi3_lunacl_depend_item(deve_tmp);
+ if (ret < 0) {
+ pr_err("core_scsi3_lunacl_depend"
+ "_item() failed\n");
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ atomic_dec(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ goto out;
+ }
+ /*
+ * Located a matching SCSI Initiator Port on a different
+ * port, allocate the pr_reg_atp and attach it to the
+ * pr_reg->pr_reg_atp_list that will be processed once
+ * the original *pr_reg is processed in
+ * __core_scsi3_add_registration()
+ */
+ pr_reg_atp = __core_scsi3_do_alloc_registration(dev,
+ nacl_tmp, deve_tmp, NULL,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!pr_reg_atp) {
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ atomic_dec(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_lunacl_undepend_item(deve_tmp);
+ goto out;
+ }
+
+ list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list,
+ &pr_reg->pr_reg_atp_list);
+ spin_lock_bh(&port->sep_alua_lock);
+ }
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ spin_lock(&dev->se_port_lock);
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return pr_reg;
+out:
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
+ }
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return NULL;
+}
+
+int core_scsi3_alloc_aptpl_registration(
+ struct t10_reservation *pr_tmpl,
+ u64 sa_res_key,
+ unsigned char *i_port,
+ unsigned char *isid,
+ u32 mapped_lun,
+ unsigned char *t_port,
+ u16 tpgt,
+ u32 target_lun,
+ int res_holder,
+ int all_tg_pt,
+ u8 type)
+{
+ struct t10_pr_registration *pr_reg;
+
+ if (!i_port || !t_port || !sa_res_key) {
+ pr_err("Illegal parameters for APTPL registration\n");
+ return -EINVAL;
+ }
+
+ pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL);
+ if (!pr_reg) {
+ pr_err("Unable to allocate struct t10_pr_registration\n");
+ return -ENOMEM;
+ }
+ pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL);
+
+ INIT_LIST_HEAD(&pr_reg->pr_reg_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
+ atomic_set(&pr_reg->pr_res_holders, 0);
+ pr_reg->pr_reg_nacl = NULL;
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_res_mapped_lun = mapped_lun;
+ pr_reg->pr_aptpl_target_lun = target_lun;
+ pr_reg->pr_res_key = sa_res_key;
+ pr_reg->pr_reg_all_tg_pt = all_tg_pt;
+ pr_reg->pr_reg_aptpl = 1;
+ pr_reg->pr_reg_tg_pt_lun = NULL;
+ pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */
+ pr_reg->pr_res_type = type;
+ /*
+ * If an ISID value had been saved in APTPL metadata for this
+ * SCSI Initiator Port, restore it now.
+ */
+ if (isid != NULL) {
+ pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
+ snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
+ pr_reg->isid_present_at_reg = 1;
+ }
+ /*
+ * Copy the i_port and t_port information from caller.
+ */
+ snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port);
+ snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port);
+ pr_reg->pr_reg_tpgt = tpgt;
+ /*
+ * Set pr_res_holder from caller, the pr_reg who is the reservation
+ * holder will get it's pointer set in core_scsi3_aptpl_reserve() once
+ * the Initiator Node LUN ACL from the fabric module is created for
+ * this registration.
+ */
+ pr_reg->pr_res_holder = res_holder;
+
+ list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list);
+ pr_debug("SPC-3 PR APTPL Successfully added registration%s from"
+ " metadata\n", (res_holder) ? "+reservation" : "");
+ return 0;
+}
+
+static void core_scsi3_aptpl_reserve(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_node_acl *node_acl,
+ struct t10_pr_registration *pr_reg)
+{
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ spin_lock(&dev->dev_reservation_lock);
+ dev->dev_pr_res_holder = pr_reg;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created"
+ " new reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tpg->se_tpg_tfo->get_fabric_name(),
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
+ tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+}
+
+static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *,
+ struct t10_pr_registration *, int, int);
+
+static int __core_scsi3_check_aptpl_registration(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ u32 target_lun,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve)
+{
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ unsigned char i_port[PR_APTPL_MAX_IPORT_LEN];
+ unsigned char t_port[PR_APTPL_MAX_TPORT_LEN];
+ u16 tpgt;
+
+ memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN);
+ memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN);
+ /*
+ * Copy Initiator Port information from struct se_node_acl
+ */
+ snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname);
+ snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s",
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg));
+ tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
+ /*
+ * Look for the matching registrations+reservation from those
+ * created from APTPL metadata. Note that multiple registrations
+ * may exist for fabrics that use ISIDs in their SCSI Initiator Port
+ * TransportIDs.
+ */
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
+ pr_reg_aptpl_list) {
+ if (!strcmp(pr_reg->pr_iport, i_port) &&
+ (pr_reg->pr_res_mapped_lun == deve->mapped_lun) &&
+ !(strcmp(pr_reg->pr_tport, t_port)) &&
+ (pr_reg->pr_reg_tpgt == tpgt) &&
+ (pr_reg->pr_aptpl_target_lun == target_lun)) {
+
+ pr_reg->pr_reg_nacl = nacl;
+ pr_reg->pr_reg_deve = deve;
+ pr_reg->pr_reg_tg_pt_lun = lun;
+
+ list_del(&pr_reg->pr_reg_aptpl_list);
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+ /*
+ * At this point all of the pointers in *pr_reg will
+ * be setup, so go ahead and add the registration.
+ */
+
+ __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0);
+ /*
+ * If this registration is the reservation holder,
+ * make that happen now..
+ */
+ if (pr_reg->pr_res_holder)
+ core_scsi3_aptpl_reserve(dev, tpg,
+ nacl, pr_reg);
+ /*
+ * Reenable pr_aptpl_active to accept new metadata
+ * updates once the SCSI device is active again..
+ */
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ pr_tmpl->pr_aptpl_active = 1;
+ }
+ }
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+
+ return 0;
+}
+
+int core_scsi3_check_aptpl_registration(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ struct se_lun_acl *lun_acl)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct se_node_acl *nacl = lun_acl->se_lun_nacl;
+ struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun];
+
+ if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return __core_scsi3_check_aptpl_registration(dev, tpg, lun,
+ lun->unpacked_lun, nacl, deve);
+}
+
+static void __core_scsi3_dump_registration(
+ struct target_core_fabric_ops *tfo,
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct t10_pr_registration *pr_reg,
+ int register_type)
+{
+ struct se_portal_group *se_tpg = nacl->se_tpg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator"
+ " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ?
+ "_AND_MOVE" : (register_type == 1) ?
+ "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname,
+ (prf_isid) ? i_buf : "");
+ pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n",
+ tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg),
+ tfo->tpg_get_tag(se_tpg));
+ pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
+ " Port(s)\n", tfo->get_fabric_name(),
+ (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
+ dev->transport->name);
+ pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
+ " 0x%08x APTPL: %d\n", tfo->get_fabric_name(),
+ pr_reg->pr_res_key, pr_reg->pr_res_generation,
+ pr_reg->pr_reg_aptpl);
+}
+
+/*
+ * this function can be called with struct se_device->dev_reservation_lock
+ * when register_move = 1
+ */
+static void __core_scsi3_add_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct t10_pr_registration *pr_reg,
+ int register_type,
+ int register_move)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+
+ /*
+ * Increment PRgeneration counter for struct se_device upon a successful
+ * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action
+ *
+ * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service
+ * action, the struct se_device->dev_reservation_lock will already be held,
+ * so we do not call core_scsi3_pr_generation() which grabs the lock
+ * for the REGISTER.
+ */
+ pr_reg->pr_res_generation = (register_move) ?
+ su_dev->t10_pr.pr_generation++ :
+ core_scsi3_pr_generation(dev);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list);
+ pr_reg->pr_reg_deve->def_pr_registered = 1;
+
+ __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type);
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE.
+ */
+ if (!pr_reg->pr_reg_all_tg_pt || register_move)
+ return;
+ /*
+ * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1
+ * allocated in __core_scsi3_alloc_registration()
+ */
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+
+ pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_add_tail(&pr_reg_tmp->pr_reg_list,
+ &pr_tmpl->registration_list);
+ pr_reg_tmp->pr_reg_deve->def_pr_registered = 1;
+
+ __core_scsi3_dump_registration(tfo, dev,
+ pr_reg_tmp->pr_reg_nacl, pr_reg_tmp,
+ register_type);
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Drop configfs group dependency reference from
+ * __core_scsi3_alloc_registration()
+ */
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ }
+}
+
+static int core_scsi3_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl,
+ int register_type,
+ int register_move)
+{
+ struct t10_pr_registration *pr_reg;
+
+ pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!pr_reg)
+ return -EPERM;
+
+ __core_scsi3_add_registration(dev, nacl, pr_reg,
+ register_type, register_move);
+ return 0;
+}
+
+static struct t10_pr_registration *__core_scsi3_locate_pr_reg(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ unsigned char *isid)
+{
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct se_portal_group *tpg;
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+ /*
+ * First look for a matching struct se_node_acl
+ */
+ if (pr_reg->pr_reg_nacl != nacl)
+ continue;
+
+ tpg = pr_reg->pr_reg_nacl->se_tpg;
+ /*
+ * If this registration does NOT contain a fabric provided
+ * ISID, then we have found a match.
+ */
+ if (!pr_reg->isid_present_at_reg) {
+ /*
+ * Determine if this SCSI device server requires that
+ * SCSI Intiatior TransportID w/ ISIDs is enforced
+ * for fabric modules (iSCSI) requiring them.
+ */
+ if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
+ if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids)
+ continue;
+ }
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ return pr_reg;
+ }
+ /*
+ * If the *pr_reg contains a fabric defined ISID for multi-value
+ * SCSI Initiator Port TransportIDs, then we expect a valid
+ * matching ISID to be provided by the local SCSI Initiator Port.
+ */
+ if (!isid)
+ continue;
+ if (strcmp(isid, pr_reg->pr_reg_isid))
+ continue;
+
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ return pr_reg;
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ return NULL;
+}
+
+static struct t10_pr_registration *core_scsi3_locate_pr_reg(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_session *sess)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+ unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
+
+ if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
+ memset(&buf[0], 0, PR_REG_ISID_LEN);
+ tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0],
+ PR_REG_ISID_LEN);
+ isid_ptr = &buf[0];
+ }
+
+ return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr);
+}
+
+static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg)
+{
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_check_implict_release(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg)
+{
+ struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
+ struct t10_pr_registration *pr_res_holder;
+ int ret = 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!pr_res_holder) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return ret;
+ }
+ if (pr_res_holder == pr_reg) {
+ /*
+ * Perform an implict RELEASE if the registration that
+ * is being released is holding the reservation.
+ *
+ * From spc4r17, section 5.7.11.1:
+ *
+ * e) If the I_T nexus is the persistent reservation holder
+ * and the persistent reservation is not an all registrants
+ * type, then a PERSISTENT RESERVE OUT command with REGISTER
+ * service action or REGISTER AND IGNORE EXISTING KEY
+ * service action with the SERVICE ACTION RESERVATION KEY
+ * field set to zero (see 5.7.11.3).
+ */
+ __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0);
+ ret = 1;
+ /*
+ * For 'All Registrants' reservation types, all existing
+ * registrations are still processed as reservation holders
+ * in core_scsi3_pr_seq_non_holder() after the initial
+ * reservation holder is implictly released here.
+ */
+ } else if (pr_reg->pr_reg_all_tg_pt &&
+ (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname,
+ pr_reg->pr_reg_nacl->initiatorname)) &&
+ (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) {
+ pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1"
+ " UNREGISTER while existing reservation with matching"
+ " key 0x%016Lx is present from another SCSI Initiator"
+ " Port\n", pr_reg->pr_res_key);
+ ret = -EPERM;
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+/*
+ * Called with struct t10_reservation->registration_lock held.
+ */
+static void __core_scsi3_free_registration(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg,
+ struct list_head *preempt_and_abort_list,
+ int dec_holders)
+{
+ struct target_core_fabric_ops *tfo =
+ pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ pr_reg->pr_reg_deve->def_pr_registered = 0;
+ pr_reg->pr_reg_deve->pr_res_key = 0;
+ list_del(&pr_reg->pr_reg_list);
+ /*
+ * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(),
+ * so call core_scsi3_put_pr_reg() to decrement our reference.
+ */
+ if (dec_holders)
+ core_scsi3_put_pr_reg(pr_reg);
+ /*
+ * Wait until all reference from any other I_T nexuses for this
+ * *pr_reg have been released. Because list_del() is called above,
+ * the last core_scsi3_put_pr_reg(pr_reg) will release this reference
+ * count back to zero, and we release *pr_reg.
+ */
+ while (atomic_read(&pr_reg->pr_res_holders) != 0) {
+ spin_unlock(&pr_tmpl->registration_lock);
+ pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n",
+ tfo->get_fabric_name());
+ cpu_relax();
+ spin_lock(&pr_tmpl->registration_lock);
+ }
+
+ pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator"
+ " Node: %s%s\n", tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
+ " Port(s)\n", tfo->get_fabric_name(),
+ (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
+ dev->transport->name);
+ pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
+ " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key,
+ pr_reg->pr_res_generation);
+
+ if (!preempt_and_abort_list) {
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return;
+ }
+ /*
+ * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list
+ * are released once the ABORT_TASK_SET has completed..
+ */
+ list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list);
+}
+
+void core_scsi3_free_pr_reg_from_nacl(
+ struct se_device *dev,
+ struct se_node_acl *nacl)
+{
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
+ /*
+ * If the passed se_node_acl matches the reservation holder,
+ * release the reservation.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if ((pr_res_holder != NULL) &&
+ (pr_res_holder->pr_reg_nacl == nacl))
+ __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0);
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * Release any registration associated with the struct se_node_acl.
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ if (pr_reg->pr_reg_nacl != nacl)
+ continue;
+
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+}
+
+void core_scsi3_free_all_registrations(
+ struct se_device *dev)
+{
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder != NULL) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ pr_res_holder, 0);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
+ pr_reg_aptpl_list) {
+ list_del(&pr_reg->pr_reg_aptpl_list);
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ }
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+}
+
+static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg)
+{
+ return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
+ &tpg->tpg_group.cg_item);
+}
+
+static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg)
+{
+ configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
+ &tpg->tpg_group.cg_item);
+
+ atomic_dec(&tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+
+ if (nacl->dynamic_node_acl)
+ return 0;
+
+ return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
+ &nacl->acl_group.cg_item);
+}
+
+static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+
+ if (nacl->dynamic_node_acl) {
+ atomic_dec(&nacl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ return;
+ }
+
+ configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
+ &nacl->acl_group.cg_item);
+
+ atomic_dec(&nacl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve)
+{
+ struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_node_acl *nacl;
+ struct se_portal_group *tpg;
+ /*
+ * For nacl->dynamic_node_acl=1
+ */
+ if (!lun_acl)
+ return 0;
+
+ nacl = lun_acl->se_lun_nacl;
+ tpg = nacl->se_tpg;
+
+ return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
+ &lun_acl->se_lun_group.cg_item);
+}
+
+static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve)
+{
+ struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_node_acl *nacl;
+ struct se_portal_group *tpg;
+ /*
+ * For nacl->dynamic_node_acl=1
+ */
+ if (!lun_acl) {
+ atomic_dec(&se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ return;
+ }
+ nacl = lun_acl->se_lun_nacl;
+ tpg = nacl->se_tpg;
+
+ configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
+ &lun_acl->se_lun_group.cg_item);
+
+ atomic_dec(&se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_decode_spec_i_port(
+ struct se_cmd *cmd,
+ struct se_portal_group *tpg,
+ unsigned char *l_isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_port *tmp_port;
+ struct se_portal_group *dest_tpg = NULL, *tmp_tpg;
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_node_acl *dest_node_acl = NULL;
+ struct se_dev_entry *dest_se_deve = NULL, *local_se_deve;
+ struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e;
+ struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
+ LIST_HEAD(tid_dest_list);
+ struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
+ struct target_core_fabric_ops *tmp_tf_ops;
+ unsigned char *buf;
+ unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
+ char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ u32 tpdl, tid_len = 0;
+ int ret, dest_local_nexus, prf_isid;
+ u32 dest_rtpi = 0;
+
+ memset(dest_iport, 0, 64);
+
+ local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Allocate a struct pr_transport_id_holder and setup the
+ * local_node_acl and local_se_deve pointers and add to
+ * struct list_head tid_dest_list for add registration
+ * processing in the loop of tid_dest_list below.
+ */
+ tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL);
+ if (!tidh_new) {
+ pr_err("Unable to allocate tidh_new\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ INIT_LIST_HEAD(&tidh_new->dest_list);
+ tidh_new->dest_tpg = tpg;
+ tidh_new->dest_node_acl = se_sess->se_node_acl;
+ tidh_new->dest_se_deve = local_se_deve;
+
+ local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
+ se_sess->se_node_acl, local_se_deve, l_isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!local_pr_reg) {
+ kfree(tidh_new);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+ }
+ tidh_new->dest_pr_reg = local_pr_reg;
+ /*
+ * The local I_T nexus does not hold any configfs dependances,
+ * so we set tid_h->dest_local_nexus=1 to prevent the
+ * configfs_undepend_item() calls in the tid_dest_list loops below.
+ */
+ tidh_new->dest_local_nexus = 1;
+ list_add_tail(&tidh_new->dest_list, &tid_dest_list);
+
+ buf = transport_kmap_data_sg(cmd);
+ /*
+ * For a PERSISTENT RESERVE OUT specify initiator ports payload,
+ * first extract TransportID Parameter Data Length, and make sure
+ * the value matches up to the SCSI expected data transfer length.
+ */
+ tpdl = (buf[24] & 0xff) << 24;
+ tpdl |= (buf[25] & 0xff) << 16;
+ tpdl |= (buf[26] & 0xff) << 8;
+ tpdl |= buf[27] & 0xff;
+
+ if ((tpdl + 28) != cmd->data_length) {
+ pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header"
+ " does not equal CDB data_length: %u\n", tpdl,
+ cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * Start processing the received transport IDs using the
+ * receiving I_T Nexus portal's fabric dependent methods to
+ * obtain the SCSI Initiator Port/Device Identifiers.
+ */
+ ptr = &buf[28];
+
+ while (tpdl > 0) {
+ proto_ident = (ptr[0] & 0x0f);
+ dest_tpg = NULL;
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) {
+ tmp_tpg = tmp_port->sep_tpg;
+ if (!tmp_tpg)
+ continue;
+ tmp_tf_ops = tmp_tpg->se_tpg_tfo;
+ if (!tmp_tf_ops)
+ continue;
+ if (!tmp_tf_ops->get_fabric_proto_ident ||
+ !tmp_tf_ops->tpg_parse_pr_out_transport_id)
+ continue;
+ /*
+ * Look for the matching proto_ident provided by
+ * the received TransportID
+ */
+ tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg);
+ if (tmp_proto_ident != proto_ident)
+ continue;
+ dest_rtpi = tmp_port->sep_rtpi;
+
+ i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id(
+ tmp_tpg, (const char *)ptr, &tid_len,
+ &iport_ptr);
+ if (!i_str)
+ continue;
+
+ atomic_inc(&tmp_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ ret = core_scsi3_tpg_depend_item(tmp_tpg);
+ if (ret != 0) {
+ pr_err(" core_scsi3_tpg_depend_item()"
+ " for tmp_tpg\n");
+ atomic_dec(&tmp_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * Locate the desination initiator ACL to be registered
+ * from the decoded fabric module specific TransportID
+ * at *i_str.
+ */
+ spin_lock_irq(&tmp_tpg->acl_node_lock);
+ dest_node_acl = __core_tpg_get_initiator_node_acl(
+ tmp_tpg, i_str);
+ if (dest_node_acl) {
+ atomic_inc(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ }
+ spin_unlock_irq(&tmp_tpg->acl_node_lock);
+
+ if (!dest_node_acl) {
+ core_scsi3_tpg_undepend_item(tmp_tpg);
+ spin_lock(&dev->se_port_lock);
+ continue;
+ }
+
+ ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
+ if (ret != 0) {
+ pr_err("configfs_depend_item() failed"
+ " for dest_node_acl->acl_group\n");
+ atomic_dec(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_tpg_undepend_item(tmp_tpg);
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ dest_tpg = tmp_tpg;
+ pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:"
+ " %s Port RTPI: %hu\n",
+ dest_tpg->se_tpg_tfo->get_fabric_name(),
+ dest_node_acl->initiatorname, dest_rtpi);
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ if (!dest_tpg) {
+ pr_err("SPC-3 PR SPEC_I_PT: Unable to locate"
+ " dest_tpg\n");
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+#if 0
+ pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u"
+ " tid_len: %d for %s + %s\n",
+ dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length,
+ tpdl, tid_len, i_str, iport_ptr);
+#endif
+ if (tid_len > tpdl) {
+ pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:"
+ " %u for Transport ID: %s\n", tid_len, ptr);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * Locate the desintation struct se_dev_entry pointer for matching
+ * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus
+ * Target Port.
+ */
+ dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl,
+ dest_rtpi);
+ if (!dest_se_deve) {
+ pr_err("Unable to locate %s dest_se_deve"
+ " from destination RTPI: %hu\n",
+ dest_tpg->se_tpg_tfo->get_fabric_name(),
+ dest_rtpi);
+
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_scsi3_lunacl_depend_item(dest_se_deve);
+ if (ret < 0) {
+ pr_err("core_scsi3_lunacl_depend_item()"
+ " failed\n");
+ atomic_dec(&dest_se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+#if 0
+ pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s"
+ " dest_se_deve mapped_lun: %u\n",
+ dest_tpg->se_tpg_tfo->get_fabric_name(),
+ dest_node_acl->initiatorname, dest_se_deve->mapped_lun);
+#endif
+ /*
+ * Skip any TransportIDs that already have a registration for
+ * this target port.
+ */
+ pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ if (pr_reg_e) {
+ core_scsi3_put_pr_reg(pr_reg_e);
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ptr += tid_len;
+ tpdl -= tid_len;
+ tid_len = 0;
+ continue;
+ }
+ /*
+ * Allocate a struct pr_transport_id_holder and setup
+ * the dest_node_acl and dest_se_deve pointers for the
+ * loop below.
+ */
+ tidh_new = kzalloc(sizeof(struct pr_transport_id_holder),
+ GFP_KERNEL);
+ if (!tidh_new) {
+ pr_err("Unable to allocate tidh_new\n");
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_LIST_HEAD(&tidh_new->dest_list);
+ tidh_new->dest_tpg = dest_tpg;
+ tidh_new->dest_node_acl = dest_node_acl;
+ tidh_new->dest_se_deve = dest_se_deve;
+
+ /*
+ * Allocate, but do NOT add the registration for the
+ * TransportID referenced SCSI Initiator port. This
+ * done because of the following from spc4r17 in section
+ * 6.14.3 wrt SPEC_I_PT:
+ *
+ * "If a registration fails for any initiator port (e.g., if th
+ * logical unit does not have enough resources available to
+ * hold the registration information), no registrations shall be
+ * made, and the command shall be terminated with
+ * CHECK CONDITION status."
+ *
+ * That means we call __core_scsi3_alloc_registration() here,
+ * and then call __core_scsi3_add_registration() in the
+ * 2nd loop which will never fail.
+ */
+ dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
+ dest_node_acl, dest_se_deve, iport_ptr,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!dest_pr_reg) {
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ kfree(tidh_new);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ tidh_new->dest_pr_reg = dest_pr_reg;
+ list_add_tail(&tidh_new->dest_list, &tid_dest_list);
+
+ ptr += tid_len;
+ tpdl -= tid_len;
+ tid_len = 0;
+
+ }
+
+ transport_kunmap_data_sg(cmd);
+
+ /*
+ * Go ahead and create a registrations from tid_dest_list for the
+ * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl
+ * and dest_se_deve.
+ *
+ * The SA Reservation Key from the PROUT is set for the
+ * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1
+ * means that the TransportID Initiator port will be
+ * registered on all of the target ports in the SCSI target device
+ * ALL_TG_PT=0 means the registration will only be for the
+ * SCSI target port the PROUT REGISTER with SPEC_I_PT=1
+ * was received.
+ */
+ list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
+ dest_tpg = tidh->dest_tpg;
+ dest_node_acl = tidh->dest_node_acl;
+ dest_se_deve = tidh->dest_se_deve;
+ dest_pr_reg = tidh->dest_pr_reg;
+ dest_local_nexus = tidh->dest_local_nexus;
+
+ list_del(&tidh->dest_list);
+ kfree(tidh);
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ __core_scsi3_add_registration(cmd->se_dev, dest_node_acl,
+ dest_pr_reg, 0, 0);
+
+ pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully"
+ " registered Transport ID for Node: %s%s Mapped LUN:"
+ " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(),
+ dest_node_acl->initiatorname, (prf_isid) ?
+ &i_buf[0] : "", dest_se_deve->mapped_lun);
+
+ if (dest_local_nexus)
+ continue;
+
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ }
+
+ return 0;
+out:
+ transport_kunmap_data_sg(cmd);
+ /*
+ * For the failure case, release everything from tid_dest_list
+ * including *dest_pr_reg and the configfs dependances..
+ */
+ list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
+ dest_tpg = tidh->dest_tpg;
+ dest_node_acl = tidh->dest_node_acl;
+ dest_se_deve = tidh->dest_se_deve;
+ dest_pr_reg = tidh->dest_pr_reg;
+ dest_local_nexus = tidh->dest_local_nexus;
+
+ list_del(&tidh->dest_list);
+ kfree(tidh);
+ /*
+ * Release any extra ALL_TG_PT=1 registrations for
+ * the SPEC_I_PT=1 case.
+ */
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &dest_pr_reg->pr_reg_atp_list,
+ pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
+ }
+
+ kfree(dest_pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, dest_pr_reg);
+
+ if (dest_local_nexus)
+ continue;
+
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ }
+ return ret;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held
+ */
+static int __core_scsi3_update_aptpl_buf(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len,
+ int clear_aptpl_metadata)
+{
+ struct se_lun *lun;
+ struct se_portal_group *tpg;
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+ unsigned char tmp[512], isid_buf[32];
+ ssize_t len = 0;
+ int reg_count = 0;
+
+ memset(buf, 0, pr_aptpl_buf_len);
+ /*
+ * Called to clear metadata once APTPL has been deactivated.
+ */
+ if (clear_aptpl_metadata) {
+ snprintf(buf, pr_aptpl_buf_len,
+ "No Registrations or Reservations\n");
+ return 0;
+ }
+ /*
+ * Walk the registration list..
+ */
+ spin_lock(&su_dev->t10_pr.registration_lock);
+ list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+ pr_reg_list) {
+
+ tmp[0] = '\0';
+ isid_buf[0] = '\0';
+ tpg = pr_reg->pr_reg_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ /*
+ * Write out any ISID value to APTPL metadata that was included
+ * in the original registration.
+ */
+ if (pr_reg->isid_present_at_reg)
+ snprintf(isid_buf, 32, "initiator_sid=%s\n",
+ pr_reg->pr_reg_isid);
+ /*
+ * Include special metadata if the pr_reg matches the
+ * reservation holder.
+ */
+ if (dev->dev_pr_res_holder == pr_reg) {
+ snprintf(tmp, 512, "PR_REG_START: %d"
+ "\ninitiator_fabric=%s\n"
+ "initiator_node=%s\n%s"
+ "sa_res_key=%llu\n"
+ "res_holder=1\nres_type=%02x\n"
+ "res_scope=%02x\nres_all_tg_pt=%d\n"
+ "mapped_lun=%u\n", reg_count,
+ tpg->se_tpg_tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, isid_buf,
+ pr_reg->pr_res_key, pr_reg->pr_res_type,
+ pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt,
+ pr_reg->pr_res_mapped_lun);
+ } else {
+ snprintf(tmp, 512, "PR_REG_START: %d\n"
+ "initiator_fabric=%s\ninitiator_node=%s\n%s"
+ "sa_res_key=%llu\nres_holder=0\n"
+ "res_all_tg_pt=%d\nmapped_lun=%u\n",
+ reg_count, tpg->se_tpg_tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, isid_buf,
+ pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt,
+ pr_reg->pr_res_mapped_lun);
+ }
+
+ if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
+ pr_err("Unable to update renaming"
+ " APTPL metadata\n");
+ spin_unlock(&su_dev->t10_pr.registration_lock);
+ return -EMSGSIZE;
+ }
+ len += sprintf(buf+len, "%s", tmp);
+
+ /*
+ * Include information about the associated SCSI target port.
+ */
+ snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n"
+ "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:"
+ " %d\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
+
+ if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
+ pr_err("Unable to update renaming"
+ " APTPL metadata\n");
+ spin_unlock(&su_dev->t10_pr.registration_lock);
+ return -EMSGSIZE;
+ }
+ len += sprintf(buf+len, "%s", tmp);
+ reg_count++;
+ }
+ spin_unlock(&su_dev->t10_pr.registration_lock);
+
+ if (!reg_count)
+ len += sprintf(buf+len, "No Registrations or Reservations");
+
+ return 0;
+}
+
+static int core_scsi3_update_aptpl_buf(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len,
+ int clear_aptpl_metadata)
+{
+ int ret;
+
+ spin_lock(&dev->dev_reservation_lock);
+ ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
+ clear_aptpl_metadata);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+/*
+ * Called with struct se_device->aptpl_file_mutex held
+ */
+static int __core_scsi3_write_aptpl_to_file(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len)
+{
+ struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
+ struct file *file;
+ struct iovec iov[1];
+ mm_segment_t old_fs;
+ int flags = O_RDWR | O_CREAT | O_TRUNC;
+ char path[512];
+ int ret;
+
+ memset(iov, 0, sizeof(struct iovec));
+ memset(path, 0, 512);
+
+ if (strlen(&wwn->unit_serial[0]) >= 512) {
+ pr_err("WWN value for struct se_device does not fit"
+ " into path buffer\n");
+ return -EMSGSIZE;
+ }
+
+ snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]);
+ file = filp_open(path, flags, 0600);
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ pr_err("filp_open(%s) for APTPL metadata"
+ " failed\n", path);
+ return IS_ERR(file) ? PTR_ERR(file) : -ENOENT;
+ }
+
+ iov[0].iov_base = &buf[0];
+ if (!pr_aptpl_buf_len)
+ iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */
+ else
+ iov[0].iov_len = pr_aptpl_buf_len;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(file, &iov[0], 1, &file->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ pr_debug("Error writing APTPL metadata file: %s\n", path);
+ filp_close(file, NULL);
+ return -EIO;
+ }
+ filp_close(file, NULL);
+
+ return 0;
+}
+
+static int core_scsi3_update_and_write_aptpl(
+ struct se_device *dev,
+ unsigned char *in_buf,
+ u32 in_pr_aptpl_buf_len)
+{
+ unsigned char null_buf[64], *buf;
+ u32 pr_aptpl_buf_len;
+ int ret, clear_aptpl_metadata = 0;
+ /*
+ * Can be called with a NULL pointer from PROUT service action CLEAR
+ */
+ if (!in_buf) {
+ memset(null_buf, 0, 64);
+ buf = &null_buf[0];
+ /*
+ * This will clear the APTPL metadata to:
+ * "No Registrations or Reservations" status
+ */
+ pr_aptpl_buf_len = 64;
+ clear_aptpl_metadata = 1;
+ } else {
+ buf = in_buf;
+ pr_aptpl_buf_len = in_pr_aptpl_buf_len;
+ }
+
+ ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
+ clear_aptpl_metadata);
+ if (ret != 0)
+ return ret;
+ /*
+ * __core_scsi3_write_aptpl_to_file() will call strlen()
+ * on the passed buf to determine pr_aptpl_buf_len.
+ */
+ ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0);
+ if (ret != 0)
+ return ret;
+
+ return ret;
+}
+
+static int core_scsi3_emulate_pro_register(
+ struct se_cmd *cmd,
+ u64 res_key,
+ u64 sa_res_key,
+ int aptpl,
+ int all_tg_pt,
+ int spec_i_pt,
+ int ignore_key)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_device *dev = cmd->se_dev;
+ struct se_dev_entry *se_deve;
+ struct se_lun *se_lun = cmd->se_lun;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ /* Used for APTPL metadata w/ UNREGISTER */
+ unsigned char *pr_aptpl_buf = NULL;
+ unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
+ int pr_holder = 0, ret = 0, type;
+
+ if (!se_sess || !se_lun) {
+ pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ se_tpg = se_sess->se_tpg;
+ se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+
+ if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) {
+ memset(&isid_buf[0], 0, PR_REG_ISID_LEN);
+ se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0],
+ PR_REG_ISID_LEN);
+ isid_ptr = &isid_buf[0];
+ }
+ /*
+ * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47
+ */
+ pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
+ if (!pr_reg_e) {
+ if (res_key) {
+ pr_warn("SPC-3 PR: Reservation Key non-zero"
+ " for SA REGISTER, returning CONFLICT\n");
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * Do nothing but return GOOD status.
+ */
+ if (!sa_res_key)
+ return 0;
+
+ if (!spec_i_pt) {
+ /*
+ * Perform the Service Action REGISTER on the Initiator
+ * Port Endpoint that the PRO was received from on the
+ * Logical Unit of the SCSI device server.
+ */
+ ret = core_scsi3_alloc_registration(cmd->se_dev,
+ se_sess->se_node_acl, se_deve, isid_ptr,
+ sa_res_key, all_tg_pt, aptpl,
+ ignore_key, 0);
+ if (ret != 0) {
+ pr_err("Unable to allocate"
+ " struct t10_pr_registration\n");
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+ } else {
+ /*
+ * Register both the Initiator port that received
+ * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI
+ * TransportID from Parameter list and loop through
+ * fabric dependent parameter list while calling
+ * logic from of core_scsi3_alloc_registration() for
+ * each TransportID provided SCSI Initiator Port/Device
+ */
+ ret = core_scsi3_decode_spec_i_port(cmd, se_tpg,
+ isid_ptr, sa_res_key, all_tg_pt, aptpl);
+ if (ret != 0)
+ return ret;
+ }
+ /*
+ * Nothing left to do for the APTPL=0 case.
+ */
+ if (!aptpl) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
+ pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
+ " REGISTER\n");
+ return 0;
+ }
+ /*
+ * Locate the newly allocated local I_T Nexus *pr_reg, and
+ * update the APTPL metadata information using its
+ * preallocated *pr_reg->pr_aptpl_buf.
+ */
+ pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev,
+ se_sess->se_node_acl, se_sess);
+
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret) {
+ pr_tmpl->pr_aptpl_active = 1;
+ pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return ret;
+ } else {
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = pr_reg_e;
+ type = pr_reg->pr_res_type;
+
+ if (!ignore_key) {
+ if (res_key != pr_reg->pr_res_key) {
+ pr_err("SPC-3 PR REGISTER: Received"
+ " res_key: 0x%016Lx does not match"
+ " existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key,
+ pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ }
+ if (spec_i_pt) {
+ pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT"
+ " set while sa_res_key=0\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+ /*
+ * An existing ALL_TG_PT=1 registration being released
+ * must also set ALL_TG_PT=1 in the incoming PROUT.
+ */
+ if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) {
+ pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1"
+ " registration exists, but ALL_TG_PT=1 bit not"
+ " present in received PROUT\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+ /*
+ * Allocate APTPL metadata buffer used for UNREGISTER ops
+ */
+ if (aptpl) {
+ pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len,
+ GFP_KERNEL);
+ if (!pr_aptpl_buf) {
+ pr_err("Unable to allocate"
+ " pr_aptpl_buf\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ }
+ /*
+ * sa_res_key=0 Unregister Reservation Key for registered I_T
+ * Nexus sa_res_key=1 Change Reservation Key for registered I_T
+ * Nexus.
+ */
+ if (!sa_res_key) {
+ pr_holder = core_scsi3_check_implict_release(
+ cmd->se_dev, pr_reg);
+ if (pr_holder < 0) {
+ kfree(pr_aptpl_buf);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+
+ spin_lock(&pr_tmpl->registration_lock);
+ /*
+ * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port
+ * and matching pr_res_key.
+ */
+ if (pr_reg->pr_reg_all_tg_pt) {
+ list_for_each_entry_safe(pr_reg_p, pr_reg_tmp,
+ &pr_tmpl->registration_list,
+ pr_reg_list) {
+
+ if (!pr_reg_p->pr_reg_all_tg_pt)
+ continue;
+
+ if (pr_reg_p->pr_res_key != res_key)
+ continue;
+
+ if (pr_reg == pr_reg_p)
+ continue;
+
+ if (strcmp(pr_reg->pr_reg_nacl->initiatorname,
+ pr_reg_p->pr_reg_nacl->initiatorname))
+ continue;
+
+ __core_scsi3_free_registration(dev,
+ pr_reg_p, NULL, 0);
+ }
+ }
+ /*
+ * Release the calling I_T Nexus registration now..
+ */
+ __core_scsi3_free_registration(cmd->se_dev, pr_reg,
+ NULL, 1);
+ /*
+ * From spc4r17, section 5.7.11.3 Unregistering
+ *
+ * If the persistent reservation is a registrants only
+ * type, the device server shall establish a unit
+ * attention condition for the initiator port associated
+ * with every registered I_T nexus except for the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command was
+ * received, with the additional sense code set to
+ * RESERVATIONS RELEASED.
+ */
+ if (pr_holder &&
+ ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
+ (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) {
+ list_for_each_entry(pr_reg_p,
+ &pr_tmpl->registration_list,
+ pr_reg_list) {
+
+ core_scsi3_ua_allocate(
+ pr_reg_p->pr_reg_nacl,
+ pr_reg_p->pr_res_mapped_lun,
+ 0x2A,
+ ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ if (!aptpl) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+ pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
+ " for UNREGISTER\n");
+ return 0;
+ }
+
+ ret = core_scsi3_update_and_write_aptpl(dev,
+ &pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret) {
+ pr_tmpl->pr_aptpl_active = 1;
+ pr_debug("SPC-3 PR: Set APTPL Bit Activated"
+ " for UNREGISTER\n");
+ }
+
+ kfree(pr_aptpl_buf);
+ return ret;
+ } else {
+ /*
+ * Increment PRgeneration counter for struct se_device"
+ * upon a successful REGISTER, see spc4r17 section 6.3.2
+ * READ_KEYS service action.
+ */
+ pr_reg->pr_res_generation = core_scsi3_pr_generation(
+ cmd->se_dev);
+ pr_reg->pr_res_key = sa_res_key;
+ pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
+ " Key for %s to: 0x%016Lx PRgeneration:"
+ " 0x%08x\n", cmd->se_tfo->get_fabric_name(),
+ (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "",
+ pr_reg->pr_reg_nacl->initiatorname,
+ pr_reg->pr_res_key, pr_reg->pr_res_generation);
+
+ if (!aptpl) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+ core_scsi3_put_pr_reg(pr_reg);
+ pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
+ " for REGISTER\n");
+ return 0;
+ }
+
+ ret = core_scsi3_update_and_write_aptpl(dev,
+ &pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret) {
+ pr_tmpl->pr_aptpl_active = 1;
+ pr_debug("SPC-3 PR: Set APTPL Bit Activated"
+ " for REGISTER\n");
+ }
+
+ kfree(pr_aptpl_buf);
+ core_scsi3_put_pr_reg(pr_reg);
+ }
+ }
+ return 0;
+}
+
+unsigned char *core_scsi3_pr_dump_type(int type)
+{
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ return "Write Exclusive Access";
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ return "Exclusive Access";
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ return "Write Exclusive Access, Registrants Only";
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ return "Exclusive Access, Registrants Only";
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ return "Write Exclusive Access, All Registrants";
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ return "Exclusive Access, All Registrants";
+ default:
+ break;
+ }
+
+ return "Unknown SPC-3 PR Type";
+}
+
+static int core_scsi3_pro_reserve(
+ struct se_cmd *cmd,
+ struct se_device *dev,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_lun *se_lun = cmd->se_lun;
+ struct t10_pr_registration *pr_reg, *pr_res_holder;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int ret, prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ if (!se_sess || !se_lun) {
+ pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
+ se_sess);
+ if (!pr_reg) {
+ pr_err("SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for RESERVE\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * An application client creates a persistent reservation by issuing
+ * a PERSISTENT RESERVE OUT command with RESERVE service action through
+ * a registered I_T nexus with the following parameters:
+ * a) RESERVATION KEY set to the value of the reservation key that is
+ * registered with the logical unit for the I_T nexus; and
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx"
+ " does not match existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * From above:
+ * b) TYPE field and SCOPE field set to the persistent reservation
+ * being created.
+ *
+ * Only one persistent reservation is allowed at a time per logical unit
+ * and that persistent reservation has a scope of LU_SCOPE.
+ */
+ if (scope != PR_SCOPE_LU_SCOPE) {
+ pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+ /*
+ * See if we have an existing PR reservation holder pointer at
+ * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration
+ * *pr_res_holder.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if ((pr_res_holder)) {
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If the device server receives a PERSISTENT RESERVE OUT
+ * command from an I_T nexus other than a persistent reservation
+ * holder (see 5.7.10) that attempts to create a persistent
+ * reservation when a persistent reservation already exists for
+ * the logical unit, then the command shall be completed with
+ * RESERVATION CONFLICT status.
+ */
+ if (pr_res_holder != pr_reg) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ pr_err("SPC-3 PR: Attempted RESERVE from"
+ " [%s]: %s while reservation already held by"
+ " [%s]: %s, returning RESERVATION_CONFLICT\n",
+ cmd->se_tfo->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If a persistent reservation holder attempts to modify the
+ * type or scope of an existing persistent reservation, the
+ * command shall be completed with RESERVATION CONFLICT status.
+ */
+ if ((pr_res_holder->pr_res_type != type) ||
+ (pr_res_holder->pr_res_scope != scope)) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ pr_err("SPC-3 PR: Attempted RESERVE from"
+ " [%s]: %s trying to change TYPE and/or SCOPE,"
+ " while reservation already held by [%s]: %s,"
+ " returning RESERVATION_CONFLICT\n",
+ cmd->se_tfo->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If the device server receives a PERSISTENT RESERVE OUT
+ * command with RESERVE service action where the TYPE field and
+ * the SCOPE field contain the same values as the existing type
+ * and scope from a persistent reservation holder, it shall not
+ * make any change to the existing persistent reservation and
+ * shall completethe command with GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+ }
+ /*
+ * Otherwise, our *pr_reg becomes the PR reservation holder for said
+ * TYPE/SCOPE. Also set the received scope and type in *pr_reg.
+ */
+ pr_reg->pr_res_scope = scope;
+ pr_reg->pr_res_type = type;
+ pr_reg->pr_res_holder = 1;
+ dev->dev_pr_res_holder = pr_reg;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
+ cmd->se_tfo->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret)
+ pr_debug("SPC-3 PR: Updated APTPL metadata"
+ " for RESERVE\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_reserve(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ int ret = 0;
+
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key);
+ break;
+ default:
+ pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:"
+ " 0x%02x\n", type);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held.
+ */
+static void __core_scsi3_complete_pro_release(
+ struct se_device *dev,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int explict)
+{
+ struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Go ahead and release the current PR reservation holder.
+ */
+ dev->dev_pr_res_holder = NULL;
+
+ pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tfo->get_fabric_name(), (explict) ? "explict" : "implict",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n",
+ tfo->get_fabric_name(), se_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ /*
+ * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE
+ */
+ pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0;
+}
+
+static int core_scsi3_emulate_pro_release(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_lun *se_lun = cmd->se_lun;
+ struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ int ret, all_reg = 0;
+
+ if (!se_sess || !se_lun) {
+ pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
+ if (!pr_reg) {
+ pr_err("SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for RELEASE\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing:
+ *
+ * If there is no persistent reservation or in response to a persistent
+ * reservation release request from a registered I_T nexus that is not a
+ * persistent reservation holder (see 5.7.10), the device server shall
+ * do the following:
+ *
+ * a) Not release the persistent reservation, if any;
+ * b) Not remove any registrations; and
+ * c) Complete the command with GOOD status.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!pr_res_holder) {
+ /*
+ * No persistent reservation, return GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+ }
+ if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
+ all_reg = 1;
+
+ if ((all_reg == 0) && (pr_res_holder != pr_reg)) {
+ /*
+ * Non 'All Registrants' PR Type cases..
+ * Release request from a registered I_T nexus that is not a
+ * persistent reservation holder. return GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing:
+ *
+ * Only the persistent reservation holder (see 5.7.10) is allowed to
+ * release a persistent reservation.
+ *
+ * An application client releases the persistent reservation by issuing
+ * a PERSISTENT RESERVE OUT command with RELEASE service action through
+ * an I_T nexus that is a persistent reservation holder with the
+ * following parameters:
+ *
+ * a) RESERVATION KEY field set to the value of the reservation key
+ * that is registered with the logical unit for the I_T nexus;
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx"
+ " does not match existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing and above:
+ *
+ * b) TYPE field and SCOPE field set to match the persistent
+ * reservation being released.
+ */
+ if ((pr_res_holder->pr_res_type != type) ||
+ (pr_res_holder->pr_res_scope != scope)) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ pr_err("SPC-3 PR RELEASE: Attempted to release"
+ " reservation from [%s]: %s with different TYPE "
+ "and/or SCOPE while reservation already held by"
+ " [%s]: %s, returning RESERVATION_CONFLICT\n",
+ cmd->se_tfo->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * In response to a persistent reservation release request from the
+ * persistent reservation holder the device server shall perform a
+ * release by doing the following as an uninterrupted series of actions:
+ * a) Release the persistent reservation;
+ * b) Not remove any registration(s);
+ * c) If the released persistent reservation is a registrants only type
+ * or all registrants type persistent reservation,
+ * the device server shall establish a unit attention condition for
+ * the initiator port associated with every regis-
+ * tered I_T nexus other than I_T nexus on which the PERSISTENT
+ * RESERVE OUT command with RELEASE service action was received,
+ * with the additional sense code set to RESERVATIONS RELEASED; and
+ * d) If the persistent reservation is of any other type, the device
+ * server shall not establish a unit attention condition.
+ */
+ __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl,
+ pr_reg, 1);
+
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) &&
+ (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) &&
+ (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) &&
+ (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ /*
+ * If no UNIT ATTENTION conditions will be established for
+ * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS
+ * go ahead and check for APTPL=1 update+write below
+ */
+ goto write_aptpl;
+ }
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list,
+ pr_reg_list) {
+ /*
+ * Do not establish a UNIT ATTENTION condition
+ * for the calling I_T Nexus
+ */
+ if (pr_reg_p == pr_reg)
+ continue;
+
+ core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl,
+ pr_reg_p->pr_res_mapped_lun,
+ 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+write_aptpl:
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret)
+ pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_clear(
+ struct se_cmd *cmd,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_session *se_sess = cmd->se_sess;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
+ u32 pr_res_mapped_lun = 0;
+ int calling_it_nexus = 0;
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev,
+ se_sess->se_node_acl, se_sess);
+ if (!pr_reg_n) {
+ pr_err("SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for CLEAR\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17 section 5.7.11.6, Clearing:
+ *
+ * Any application client may release the persistent reservation and
+ * remove all registrations from a device server by issuing a
+ * PERSISTENT RESERVE OUT command with CLEAR service action through a
+ * registered I_T nexus with the following parameter:
+ *
+ * a) RESERVATION KEY field set to the value of the reservation key
+ * that is registered with the logical unit for the I_T nexus.
+ */
+ if (res_key != pr_reg_n->pr_res_key) {
+ pr_err("SPC-3 PR REGISTER: Received"
+ " res_key: 0x%016Lx does not match"
+ " existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * a) Release the persistent reservation, if any;
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ pr_res_holder, 0);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * b) Remove all registration(s) (see spc4r17 5.7.7);
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg, NULL,
+ calling_it_nexus);
+ /*
+ * e) Establish a unit attention condition for the initiator
+ * port associated with every registered I_T nexus other
+ * than the I_T nexus on which the PERSISTENT RESERVE OUT
+ * command with CLEAR service action was received, with the
+ * additional sense code set to RESERVATIONS PREEMPTED.
+ */
+ if (!calling_it_nexus)
+ core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun,
+ 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n",
+ cmd->se_tfo->get_fabric_name());
+
+ if (pr_tmpl->pr_aptpl_active) {
+ core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
+ pr_debug("SPC-3 PR: Updated APTPL metadata"
+ " for CLEAR\n");
+ }
+
+ core_scsi3_pr_generation(dev);
+ return 0;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held.
+ */
+static void __core_scsi3_complete_pro_preempt(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg,
+ struct list_head *preempt_and_abort_list,
+ int type,
+ int scope,
+ int abort)
+{
+ struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Do an implict RELEASE of the existing reservation.
+ */
+ if (dev->dev_pr_res_holder)
+ __core_scsi3_complete_pro_release(dev, nacl,
+ dev->dev_pr_res_holder, 0);
+
+ dev->dev_pr_res_holder = pr_reg;
+ pr_reg->pr_res_holder = 1;
+ pr_reg->pr_res_type = type;
+ pr_reg->pr_res_scope = scope;
+
+ pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ core_scsi3_pr_dump_type(type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n",
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
+ /*
+ * For PREEMPT_AND_ABORT, add the preempting reservation's
+ * struct t10_pr_registration to the list that will be compared
+ * against received CDBs..
+ */
+ if (preempt_and_abort_list)
+ list_add_tail(&pr_reg->pr_reg_abort_list,
+ preempt_and_abort_list);
+}
+
+static void core_scsi3_release_preempt_and_abort(
+ struct list_head *preempt_and_abort_list,
+ struct t10_pr_registration *pr_reg_holder)
+{
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
+ pr_reg_abort_list) {
+
+ list_del(&pr_reg->pr_reg_abort_list);
+ if (pr_reg_holder == pr_reg)
+ continue;
+ if (pr_reg->pr_res_holder) {
+ pr_warn("pr_reg->pr_res_holder still set\n");
+ continue;
+ }
+
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ }
+}
+
+static int core_scsi3_pro_preempt(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key,
+ u64 sa_res_key,
+ int abort)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_session *se_sess = cmd->se_sess;
+ LIST_HEAD(preempt_and_abort_list);
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ u32 pr_res_mapped_lun = 0;
+ int all_reg = 0, calling_it_nexus = 0, released_regs = 0;
+ int prh_type = 0, prh_scope = 0, ret;
+
+ if (!se_sess) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+
+ pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
+ se_sess);
+ if (!pr_reg_n) {
+ pr_err("SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for PREEMPT%s\n",
+ (abort) ? "_AND_ABORT" : "");
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ if (pr_reg_n->pr_res_key != res_key) {
+ core_scsi3_put_pr_reg(pr_reg_n);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ if (scope != PR_SCOPE_LU_SCOPE) {
+ pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder &&
+ ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)))
+ all_reg = 1;
+
+ if (!all_reg && !sa_res_key) {
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+ /*
+ * From spc4r17, section 5.7.11.4.4 Removing Registrations:
+ *
+ * If the SERVICE ACTION RESERVATION KEY field does not identify a
+ * persistent reservation holder or there is no persistent reservation
+ * holder (i.e., there is no persistent reservation), then the device
+ * server shall perform a preempt by doing the following in an
+ * uninterrupted series of actions. (See below..)
+ */
+ if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) {
+ /*
+ * No existing or SA Reservation Key matching reservations..
+ *
+ * PROUT SA PREEMPT with All Registrant type reservations are
+ * allowed to be processed without a matching SA Reservation Key
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+ /*
+ * Removing of registrations in non all registrants
+ * type reservations without a matching SA reservation
+ * key.
+ *
+ * a) Remove the registrations for all I_T nexuses
+ * specified by the SERVICE ACTION RESERVATION KEY
+ * field;
+ * b) Ignore the contents of the SCOPE and TYPE fields;
+ * c) Process tasks as defined in 5.7.1; and
+ * d) Establish a unit attention condition for the
+ * initiator port associated with every I_T nexus
+ * that lost its registration other than the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command
+ * was received, with the additional sense code set
+ * to REGISTRATIONS PREEMPTED.
+ */
+ if (!all_reg) {
+ if (pr_reg->pr_res_key != sa_res_key)
+ continue;
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list :
+ NULL, calling_it_nexus);
+ released_regs++;
+ } else {
+ /*
+ * Case for any existing all registrants type
+ * reservation, follow logic in spc4r17 section
+ * 5.7.11.4 Preempting, Table 52 and Figure 7.
+ *
+ * For a ZERO SA Reservation key, release
+ * all other registrations and do an implict
+ * release of active persistent reservation.
+ *
+ * For a non-ZERO SA Reservation key, only
+ * release the matching reservation key from
+ * registrations.
+ */
+ if ((sa_res_key) &&
+ (pr_reg->pr_res_key != sa_res_key))
+ continue;
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list :
+ NULL, 0);
+ released_regs++;
+ }
+ if (!calling_it_nexus)
+ core_scsi3_ua_allocate(pr_reg_nacl,
+ pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_REGISTRATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * If a PERSISTENT RESERVE OUT with a PREEMPT service action or
+ * a PREEMPT AND ABORT service action sets the SERVICE ACTION
+ * RESERVATION KEY field to a value that does not match any
+ * registered reservation key, then the device server shall
+ * complete the command with RESERVATION CONFLICT status.
+ */
+ if (!released_regs) {
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * For an existing all registrants type reservation
+ * with a zero SA rservation key, preempt the existing
+ * reservation with the new PR type and scope.
+ */
+ if (pr_res_holder && all_reg && !(sa_res_key)) {
+ __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
+
+ if (abort)
+ core_scsi3_release_preempt_and_abort(
+ &preempt_and_abort_list, pr_reg_n);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &pr_reg_n->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret)
+ pr_debug("SPC-3 PR: Updated APTPL"
+ " metadata for PREEMPT%s\n", (abort) ?
+ "_AND_ABORT" : "");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg_n);
+ core_scsi3_pr_generation(cmd->se_dev);
+ return 0;
+ }
+ /*
+ * The PREEMPTing SA reservation key matches that of the
+ * existing persistent reservation, first, we check if
+ * we are preempting our own reservation.
+ * From spc4r17, section 5.7.11.4.3 Preempting
+ * persistent reservations and registration handling
+ *
+ * If an all registrants persistent reservation is not
+ * present, it is not an error for the persistent
+ * reservation holder to preempt itself (i.e., a
+ * PERSISTENT RESERVE OUT with a PREEMPT service action
+ * or a PREEMPT AND ABORT service action with the
+ * SERVICE ACTION RESERVATION KEY value equal to the
+ * persistent reservation holder's reservation key that
+ * is received from the persistent reservation holder).
+ * In that case, the device server shall establish the
+ * new persistent reservation and maintain the
+ * registration.
+ */
+ prh_type = pr_res_holder->pr_res_type;
+ prh_scope = pr_res_holder->pr_res_scope;
+ /*
+ * If the SERVICE ACTION RESERVATION KEY field identifies a
+ * persistent reservation holder (see 5.7.10), the device
+ * server shall perform a preempt by doing the following as
+ * an uninterrupted series of actions:
+ *
+ * a) Release the persistent reservation for the holder
+ * identified by the SERVICE ACTION RESERVATION KEY field;
+ */
+ if (pr_reg_n != pr_res_holder)
+ __core_scsi3_complete_pro_release(dev,
+ pr_res_holder->pr_reg_nacl,
+ dev->dev_pr_res_holder, 0);
+ /*
+ * b) Remove the registrations for all I_T nexuses identified
+ * by the SERVICE ACTION RESERVATION KEY field, except the
+ * I_T nexus that is being used for the PERSISTENT RESERVE
+ * OUT command. If an all registrants persistent reservation
+ * is present and the SERVICE ACTION RESERVATION KEY field
+ * is set to zero, then all registrations shall be removed
+ * except for that of the I_T nexus that is being used for
+ * the PERSISTENT RESERVE OUT command;
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ if (pr_reg->pr_res_key != sa_res_key)
+ continue;
+
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list : NULL,
+ calling_it_nexus);
+ /*
+ * e) Establish a unit attention condition for the initiator
+ * port associated with every I_T nexus that lost its
+ * persistent reservation and/or registration, with the
+ * additional sense code set to REGISTRATIONS PREEMPTED;
+ */
+ core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_REGISTRATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * c) Establish a persistent reservation for the preempting
+ * I_T nexus using the contents of the SCOPE and TYPE fields;
+ */
+ __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
+ /*
+ * d) Process tasks as defined in 5.7.1;
+ * e) See above..
+ * f) If the type or scope has changed, then for every I_T nexus
+ * whose reservation key was not removed, except for the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command was
+ * received, the device server shall establish a unit
+ * attention condition for the initiator port associated with
+ * that I_T nexus, with the additional sense code set to
+ * RESERVATIONS RELEASED. If the type or scope have not
+ * changed, then no unit attention condition(s) shall be
+ * established for this reason.
+ */
+ if ((prh_type != type) || (prh_scope != scope)) {
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ core_scsi3_ua_allocate(pr_reg->pr_reg_nacl,
+ pr_reg->pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * Call LUN_RESET logic upon list of struct t10_pr_registration,
+ * All received CDBs for the matching existing reservation and
+ * registrations undergo ABORT_TASK logic.
+ *
+ * From there, core_scsi3_release_preempt_and_abort() will
+ * release every registration in the list (which have already
+ * been removed from the primary pr_reg list), except the
+ * new persistent reservation holder, the calling Initiator Port.
+ */
+ if (abort) {
+ core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd);
+ core_scsi3_release_preempt_and_abort(&preempt_and_abort_list,
+ pr_reg_n);
+ }
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &pr_reg_n->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret)
+ pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT"
+ "%s\n", (abort) ? "_AND_ABORT" : "");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg_n);
+ core_scsi3_pr_generation(cmd->se_dev);
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_preempt(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key,
+ u64 sa_res_key,
+ int abort)
+{
+ int ret = 0;
+
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ ret = core_scsi3_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, abort);
+ break;
+ default:
+ pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s"
+ " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+
+static int core_scsi3_emulate_pro_register_and_move(
+ struct se_cmd *cmd,
+ u64 res_key,
+ u64 sa_res_key,
+ int aptpl,
+ int unreg)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_device *dev = cmd->se_dev;
+ struct se_dev_entry *dest_se_deve = NULL;
+ struct se_lun *se_lun = cmd->se_lun;
+ struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL;
+ struct se_port *se_port;
+ struct se_portal_group *se_tpg, *dest_se_tpg = NULL;
+ struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
+ struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ unsigned char *buf;
+ unsigned char *initiator_str;
+ char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ u32 tid_len, tmp_tid_len;
+ int new_reg = 0, type, scope, ret, matching_iname, prf_isid;
+ unsigned short rtpi;
+ unsigned char proto_ident;
+
+ if (!se_sess || !se_lun) {
+ pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ memset(dest_iport, 0, 64);
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ se_tpg = se_sess->se_tpg;
+ tf_ops = se_tpg->se_tpg_tfo;
+ /*
+ * Follow logic from spc4r17 Section 5.7.8, Table 50 --
+ * Register behaviors for a REGISTER AND MOVE service action
+ *
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
+ se_sess);
+ if (!pr_reg) {
+ pr_err("SPC-3 PR: Unable to locate PR_REGISTERED"
+ " *pr_reg for REGISTER_AND_MOVE\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+ /*
+ * The provided reservation key much match the existing reservation key
+ * provided during this initiator's I_T nexus registration.
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received"
+ " res_key: 0x%016Lx does not match existing SA REGISTER"
+ " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+ /*
+ * The service active reservation key needs to be non zero
+ */
+ if (!sa_res_key) {
+ pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero"
+ " sa_res_key\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+
+ /*
+ * Determine the Relative Target Port Identifier where the reservation
+ * will be moved to for the TransportID containing SCSI initiator WWN
+ * information.
+ */
+ buf = transport_kmap_data_sg(cmd);
+ rtpi = (buf[18] & 0xff) << 8;
+ rtpi |= buf[19] & 0xff;
+ tid_len = (buf[20] & 0xff) << 24;
+ tid_len |= (buf[21] & 0xff) << 16;
+ tid_len |= (buf[22] & 0xff) << 8;
+ tid_len |= buf[23] & 0xff;
+ transport_kunmap_data_sg(cmd);
+ buf = NULL;
+
+ if ((tid_len + 24) != cmd->data_length) {
+ pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header"
+ " does not equal CDB data_length: %u\n", tid_len,
+ cmd->data_length);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) {
+ if (se_port->sep_rtpi != rtpi)
+ continue;
+ dest_se_tpg = se_port->sep_tpg;
+ if (!dest_se_tpg)
+ continue;
+ dest_tf_ops = dest_se_tpg->se_tpg_tfo;
+ if (!dest_tf_ops)
+ continue;
+
+ atomic_inc(&dest_se_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ ret = core_scsi3_tpg_depend_item(dest_se_tpg);
+ if (ret != 0) {
+ pr_err("core_scsi3_tpg_depend_item() failed"
+ " for dest_se_tpg\n");
+ atomic_dec(&dest_se_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+ }
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ if (!dest_se_tpg || !dest_tf_ops) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
+ " fabric ops from Relative Target Port Identifier:"
+ " %hu\n", rtpi);
+ core_scsi3_put_pr_reg(pr_reg);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+ proto_ident = (buf[24] & 0x0f);
+#if 0
+ pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
+ " 0x%02x\n", proto_ident);
+#endif
+ if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: Received"
+ " proto_ident: 0x%02x does not match ident: 0x%02x"
+ " from fabric: %s\n", proto_ident,
+ dest_tf_ops->get_fabric_proto_ident(dest_se_tpg),
+ dest_tf_ops->get_fabric_name());
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
+ " containg a valid tpg_parse_pr_out_transport_id"
+ " function pointer\n");
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+ initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg,
+ (const char *)&buf[24], &tmp_tid_len, &iport_ptr);
+ if (!initiator_str) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
+ " initiator_str from Transport ID\n");
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ transport_kunmap_data_sg(cmd);
+ buf = NULL;
+
+ pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s"
+ " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ?
+ "port" : "device", initiator_str, (iport_ptr != NULL) ?
+ iport_ptr : "");
+ /*
+ * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
+ * action specifies a TransportID that is the same as the initiator port
+ * of the I_T nexus for the command received, then the command shall
+ * be terminated with CHECK CONDITION status, with the sense key set to
+ * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD
+ * IN PARAMETER LIST.
+ */
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ matching_iname = (!strcmp(initiator_str,
+ pr_reg_nacl->initiatorname)) ? 1 : 0;
+ if (!matching_iname)
+ goto after_iport_check;
+
+ if (!iport_ptr || !pr_reg->isid_present_at_reg) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s"
+ " matches: %s on received I_T Nexus\n", initiator_str,
+ pr_reg_nacl->initiatorname);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) {
+ pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s"
+ " matches: %s %s on received I_T Nexus\n",
+ initiator_str, iport_ptr, pr_reg_nacl->initiatorname,
+ pr_reg->pr_reg_isid);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+after_iport_check:
+ /*
+ * Locate the destination struct se_node_acl from the received Transport ID
+ */
+ spin_lock_irq(&dest_se_tpg->acl_node_lock);
+ dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg,
+ initiator_str);
+ if (dest_node_acl) {
+ atomic_inc(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ }
+ spin_unlock_irq(&dest_se_tpg->acl_node_lock);
+
+ if (!dest_node_acl) {
+ pr_err("Unable to locate %s dest_node_acl for"
+ " TransportID%s\n", dest_tf_ops->get_fabric_name(),
+ initiator_str);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
+ if (ret != 0) {
+ pr_err("core_scsi3_nodeacl_depend_item() for"
+ " dest_node_acl\n");
+ atomic_dec(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ dest_node_acl = NULL;
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+#if 0
+ pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:"
+ " %s from TransportID\n", dest_tf_ops->get_fabric_name(),
+ dest_node_acl->initiatorname);
+#endif
+ /*
+ * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET
+ * PORT IDENTIFIER.
+ */
+ dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi);
+ if (!dest_se_deve) {
+ pr_err("Unable to locate %s dest_se_deve from RTPI:"
+ " %hu\n", dest_tf_ops->get_fabric_name(), rtpi);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_scsi3_lunacl_depend_item(dest_se_deve);
+ if (ret < 0) {
+ pr_err("core_scsi3_lunacl_depend_item() failed\n");
+ atomic_dec(&dest_se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ dest_se_deve = NULL;
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+#if 0
+ pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN"
+ " ACL for dest_se_deve->mapped_lun: %u\n",
+ dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname,
+ dest_se_deve->mapped_lun);
+#endif
+ /*
+ * A persistent reservation needs to already existing in order to
+ * successfully complete the REGISTER_AND_MOVE service action..
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!pr_res_holder) {
+ pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation"
+ " currently held\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * The received on I_T Nexus must be the reservation holder.
+ *
+ * From spc4r17 section 5.7.8 Table 50 --
+ * Register behaviors for a REGISTER AND MOVE service action
+ */
+ if (pr_res_holder != pr_reg) {
+ pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
+ " Nexus is not reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * From spc4r17 section 5.7.8: registering and moving reservation
+ *
+ * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
+ * action is received and the established persistent reservation is a
+ * Write Exclusive - All Registrants type or Exclusive Access -
+ * All Registrants type reservation, then the command shall be completed
+ * with RESERVATION CONFLICT status.
+ */
+ if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move"
+ " reservation for type: %s\n",
+ core_scsi3_pr_dump_type(pr_res_holder->pr_res_type));
+ spin_unlock(&dev->dev_reservation_lock);
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out;
+ }
+ pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ /*
+ * b) Ignore the contents of the (received) SCOPE and TYPE fields;
+ */
+ type = pr_res_holder->pr_res_type;
+ scope = pr_res_holder->pr_res_type;
+ /*
+ * c) Associate the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field with the I_T nexus specified as the
+ * destination of the register and move, where:
+ * A) The I_T nexus is specified by the TransportID and the
+ * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and
+ * B) Regardless of the TransportID format used, the association for
+ * the initiator port is based on either the initiator port name
+ * (see 3.1.71) on SCSI transport protocols where port names are
+ * required or the initiator port identifier (see 3.1.70) on SCSI
+ * transport protocols where port names are not required;
+ * d) Register the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field;
+ * e) Retain the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field and associated information;
+ *
+ * Also, It is not an error for a REGISTER AND MOVE service action to
+ * register an I_T nexus that is already registered with the same
+ * reservation key or a different reservation key.
+ */
+ dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ if (!dest_pr_reg) {
+ ret = core_scsi3_alloc_registration(cmd->se_dev,
+ dest_node_acl, dest_se_deve, iport_ptr,
+ sa_res_key, 0, aptpl, 2, 1);
+ if (ret != 0) {
+ spin_unlock(&dev->dev_reservation_lock);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ new_reg = 1;
+ }
+ /*
+ * f) Release the persistent reservation for the persistent reservation
+ * holder (i.e., the I_T nexus on which the
+ */
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ dev->dev_pr_res_holder, 0);
+ /*
+ * g) Move the persistent reservation to the specified I_T nexus using
+ * the same scope and type as the persistent reservation released in
+ * item f); and
+ */
+ dev->dev_pr_res_holder = dest_pr_reg;
+ dest_pr_reg->pr_res_holder = 1;
+ dest_pr_reg->pr_res_type = type;
+ pr_reg->pr_res_scope = scope;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Increment PRGeneration for existing registrations..
+ */
+ if (!new_reg)
+ dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE"
+ " created new reservation holder TYPE: %s on object RTPI:"
+ " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(),
+ core_scsi3_pr_dump_type(type), rtpi,
+ dest_pr_reg->pr_res_generation);
+ pr_debug("SPC-3 PR Successfully moved reservation from"
+ " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n",
+ tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(),
+ dest_node_acl->initiatorname, (iport_ptr != NULL) ?
+ iport_ptr : "");
+ /*
+ * It is now safe to release configfs group dependencies for destination
+ * of Transport ID Initiator Device/Port Identifier
+ */
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_se_tpg);
+ /*
+ * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T
+ * nexus on which PERSISTENT RESERVE OUT command was received.
+ */
+ if (unreg) {
+ spin_lock(&pr_tmpl->registration_lock);
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 1);
+ spin_unlock(&pr_tmpl->registration_lock);
+ } else
+ core_scsi3_put_pr_reg(pr_reg);
+
+ /*
+ * Clear the APTPL metadata if APTPL has been disabled, otherwise
+ * write out the updated metadata to struct file for this SCSI device.
+ */
+ if (!aptpl) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
+ pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
+ " REGISTER_AND_MOVE\n");
+ } else {
+ pr_tmpl->pr_aptpl_active = 1;
+ ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+ &dest_pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!ret)
+ pr_debug("SPC-3 PR: Set APTPL Bit Activated for"
+ " REGISTER_AND_MOVE\n");
+ }
+
+ transport_kunmap_data_sg(cmd);
+
+ core_scsi3_put_pr_reg(dest_pr_reg);
+ return 0;
+out:
+ if (buf)
+ transport_kunmap_data_sg(cmd);
+ if (dest_se_deve)
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ if (dest_node_acl)
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_se_tpg);
+ core_scsi3_put_pr_reg(pr_reg);
+ return ret;
+}
+
+static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3];
+ __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+/*
+ * See spc4r17 section 6.14 Table 170
+ */
+int target_scsi3_emulate_pr_out(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ unsigned char *cdb = &cmd->t_task_cdb[0];
+ unsigned char *buf;
+ u64 res_key, sa_res_key;
+ int sa, scope, type, aptpl;
+ int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
+ int ret;
+
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has been reserved by any RESERVE command and is
+ * still reserved by any initiator, all PERSISTENT RESERVE IN and all
+ * PERSISTENT RESERVE OUT commands shall conflict regardless of
+ * initiator or service action and shall terminate with a RESERVATION
+ * CONFLICT status.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+ pr_err("Received PERSISTENT_RESERVE CDB while legacy"
+ " SPC-2 reservation is held, returning"
+ " RESERVATION_CONFLICT\n");
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * FIXME: A NULL struct se_session pointer means an this is not coming from
+ * a $FABRIC_MOD's nexus, but from internal passthrough ops.
+ */
+ if (!cmd->se_sess) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (cmd->data_length < 24) {
+ pr_warn("SPC-PR: Received PR OUT parameter list"
+ " length too small: %u\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB)
+ */
+ sa = (cdb[1] & 0x1f);
+ scope = (cdb[2] & 0xf0);
+ type = (cdb[2] & 0x0f);
+
+ buf = transport_kmap_data_sg(cmd);
+ /*
+ * From PERSISTENT_RESERVE_OUT parameter list (payload)
+ */
+ res_key = core_scsi3_extract_reservation_key(&buf[0]);
+ sa_res_key = core_scsi3_extract_reservation_key(&buf[8]);
+ /*
+ * REGISTER_AND_MOVE uses a different SA parameter list containing
+ * SCSI TransportIDs.
+ */
+ if (sa != PRO_REGISTER_AND_MOVE) {
+ spec_i_pt = (buf[20] & 0x08);
+ all_tg_pt = (buf[20] & 0x04);
+ aptpl = (buf[20] & 0x01);
+ } else {
+ aptpl = (buf[17] & 0x01);
+ unreg = (buf[17] & 0x02);
+ }
+ transport_kunmap_data_sg(cmd);
+ buf = NULL;
+
+ /*
+ * SPEC_I_PT=1 is only valid for Service action: REGISTER
+ */
+ if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * From spc4r17 section 6.14:
+ *
+ * If the SPEC_I_PT bit is set to zero, the service action is not
+ * REGISTER AND MOVE, and the parameter list length is not 24, then
+ * the command shall be terminated with CHECK CONDITION status, with
+ * the sense key set to ILLEGAL REQUEST, and the additional sense
+ * code set to PARAMETER LIST LENGTH ERROR.
+ */
+ if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) &&
+ (cmd->data_length != 24)) {
+ pr_warn("SPC-PR: Received PR OUT illegal parameter"
+ " list length: %u\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto out;
+ }
+ /*
+ * (core_scsi3_emulate_pro_* function parameters
+ * are defined by spc4r17 Table 174:
+ * PERSISTENT_RESERVE_OUT service actions and valid parameters.
+ */
+ switch (sa) {
+ case PRO_REGISTER:
+ ret = core_scsi3_emulate_pro_register(cmd,
+ res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0);
+ break;
+ case PRO_RESERVE:
+ ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key);
+ break;
+ case PRO_RELEASE:
+ ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key);
+ break;
+ case PRO_CLEAR:
+ ret = core_scsi3_emulate_pro_clear(cmd, res_key);
+ break;
+ case PRO_PREEMPT:
+ ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, 0);
+ break;
+ case PRO_PREEMPT_AND_ABORT:
+ ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, 1);
+ break;
+ case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
+ ret = core_scsi3_emulate_pro_register(cmd,
+ 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1);
+ break;
+ case PRO_REGISTER_AND_MOVE:
+ ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key,
+ sa_res_key, aptpl, unreg);
+ break;
+ default:
+ pr_err("Unknown PERSISTENT_RESERVE_OUT service"
+ " action: 0x%02x\n", cdb[1] & 0x1f);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ ret = -EINVAL;
+ break;
+ }
+
+out:
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_KEYS
+ *
+ * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160
+ */
+static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = cmd->se_dev;
+ struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+ unsigned char *buf;
+ u32 add_len = 0, off = 8;
+
+ if (cmd->data_length < 8) {
+ pr_err("PRIN SA READ_KEYS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+ buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
+ buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
+ buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
+ buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+
+ spin_lock(&su_dev->t10_pr.registration_lock);
+ list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+ pr_reg_list) {
+ /*
+ * Check for overflow of 8byte PRI READ_KEYS payload and
+ * next reservation key list descriptor.
+ */
+ if ((add_len + 8) > (cmd->data_length - 8))
+ break;
+
+ buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
+ buf[off++] = (pr_reg->pr_res_key & 0xff);
+
+ add_len += 8;
+ }
+ spin_unlock(&su_dev->t10_pr.registration_lock);
+
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ transport_kunmap_data_sg(cmd);
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION
+ *
+ * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162
+ */
+static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = cmd->se_dev;
+ struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+ unsigned char *buf;
+ u64 pr_res_key;
+ u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */
+
+ if (cmd->data_length < 8) {
+ pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+ buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
+ buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
+ buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
+ buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+
+ spin_lock(&se_dev->dev_reservation_lock);
+ pr_reg = se_dev->dev_pr_res_holder;
+ if ((pr_reg)) {
+ /*
+ * Set the hardcoded Additional Length
+ */
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ if (cmd->data_length < 22)
+ goto err;
+
+ /*
+ * Set the Reservation key.
+ *
+ * From spc4r17, section 5.7.10:
+ * A persistent reservation holder has its reservation key
+ * returned in the parameter data from a PERSISTENT
+ * RESERVE IN command with READ RESERVATION service action as
+ * follows:
+ * a) For a persistent reservation of the type Write Exclusive
+ * - All Registrants or Exclusive Access All Regitrants,
+ * the reservation key shall be set to zero; or
+ * b) For all other persistent reservation types, the
+ * reservation key shall be set to the registered
+ * reservation key for the I_T nexus that holds the
+ * persistent reservation.
+ */
+ if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
+ pr_res_key = 0;
+ else
+ pr_res_key = pr_reg->pr_res_key;
+
+ buf[8] = ((pr_res_key >> 56) & 0xff);
+ buf[9] = ((pr_res_key >> 48) & 0xff);
+ buf[10] = ((pr_res_key >> 40) & 0xff);
+ buf[11] = ((pr_res_key >> 32) & 0xff);
+ buf[12] = ((pr_res_key >> 24) & 0xff);
+ buf[13] = ((pr_res_key >> 16) & 0xff);
+ buf[14] = ((pr_res_key >> 8) & 0xff);
+ buf[15] = (pr_res_key & 0xff);
+ /*
+ * Set the SCOPE and TYPE
+ */
+ buf[21] = (pr_reg->pr_res_scope & 0xf0) |
+ (pr_reg->pr_res_type & 0x0f);
+ }
+
+err:
+ spin_unlock(&se_dev->dev_reservation_lock);
+ transport_kunmap_data_sg(cmd);
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES
+ *
+ * See spc4r17 section 6.13.4 Table 165
+ */
+static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+ unsigned char *buf;
+ u16 add_len = 8; /* Hardcoded to 8. */
+
+ if (cmd->data_length < 6) {
+ pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:"
+ " %u too small\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+
+ buf[0] = ((add_len << 8) & 0xff);
+ buf[1] = (add_len & 0xff);
+ buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */
+ buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */
+ buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */
+ buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */
+ /*
+ * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so
+ * set the TMV: Task Mask Valid bit.
+ */
+ buf[3] |= 0x80;
+ /*
+ * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166
+ */
+ buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */
+ /*
+ * PTPL_A: Persistence across Target Power Loss Active bit
+ */
+ if (pr_tmpl->pr_aptpl_active)
+ buf[3] |= 0x01;
+ /*
+ * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167
+ */
+ buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
+ buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */
+ buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */
+ buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */
+ buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */
+ buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
+
+ transport_kunmap_data_sg(cmd);
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS
+ *
+ * See spc4r17 section 6.13.5 Table 168 and 169
+ */
+static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = cmd->se_dev;
+ struct se_node_acl *se_nacl;
+ struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr;
+ unsigned char *buf;
+ u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
+ u32 off = 8; /* off into first Full Status descriptor */
+ int format_code = 0;
+
+ if (cmd->data_length < 8) {
+ pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ buf = transport_kmap_data_sg(cmd);
+
+ buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
+ buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
+ buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
+ buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = pr_reg->pr_reg_nacl->se_tpg;
+ add_desc_len = 0;
+
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Determine expected length of $FABRIC_MOD specific
+ * TransportID full status descriptor..
+ */
+ exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len(
+ se_tpg, se_nacl, pr_reg, &format_code);
+
+ if ((exp_desc_len + add_len) > cmd->data_length) {
+ pr_warn("SPC-3 PRIN READ_FULL_STATUS ran"
+ " out of buffer: %d\n", cmd->data_length);
+ spin_lock(&pr_tmpl->registration_lock);
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+ break;
+ }
+ /*
+ * Set RESERVATION KEY
+ */
+ buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
+ buf[off++] = (pr_reg->pr_res_key & 0xff);
+ off += 4; /* Skip Over Reserved area */
+
+ /*
+ * Set ALL_TG_PT bit if PROUT SA REGISTER had this set.
+ */
+ if (pr_reg->pr_reg_all_tg_pt)
+ buf[off] = 0x02;
+ /*
+ * The struct se_lun pointer will be present for the
+ * reservation holder for PR_HOLDER bit.
+ *
+ * Also, if this registration is the reservation
+ * holder, fill in SCOPE and TYPE in the next byte.
+ */
+ if (pr_reg->pr_res_holder) {
+ buf[off++] |= 0x01;
+ buf[off++] = (pr_reg->pr_res_scope & 0xf0) |
+ (pr_reg->pr_res_type & 0x0f);
+ } else
+ off += 2;
+
+ off += 4; /* Skip over reserved area */
+ /*
+ * From spc4r17 6.3.15:
+ *
+ * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT
+ * IDENTIFIER field contains the relative port identifier (see
+ * 3.1.120) of the target port that is part of the I_T nexus
+ * described by this full status descriptor. If the ALL_TG_PT
+ * bit is set to one, the contents of the RELATIVE TARGET PORT
+ * IDENTIFIER field are not defined by this standard.
+ */
+ if (!pr_reg->pr_reg_all_tg_pt) {
+ struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep;
+
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ } else
+ off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */
+
+ /*
+ * Now, have the $FABRIC_MOD fill in the protocol identifier
+ */
+ desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg,
+ se_nacl, pr_reg, &format_code, &buf[off+4]);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+ /*
+ * Set the ADDITIONAL DESCRIPTOR LENGTH
+ */
+ buf[off++] = ((desc_len >> 24) & 0xff);
+ buf[off++] = ((desc_len >> 16) & 0xff);
+ buf[off++] = ((desc_len >> 8) & 0xff);
+ buf[off++] = (desc_len & 0xff);
+ /*
+ * Size of full desctipor header minus TransportID
+ * containing $FABRIC_MOD specific) initiator device/port
+ * WWN information.
+ *
+ * See spc4r17 Section 6.13.5 Table 169
+ */
+ add_desc_len = (24 + desc_len);
+
+ off += desc_len;
+ add_len += add_desc_len;
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Set ADDITIONAL_LENGTH
+ */
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ transport_kunmap_data_sg(cmd);
+
+ return 0;
+}
+
+int target_scsi3_emulate_pr_in(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ int ret;
+
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has been reserved by any RESERVE command and is
+ * still reserved by any initiator, all PERSISTENT RESERVE IN and all
+ * PERSISTENT RESERVE OUT commands shall conflict regardless of
+ * initiator or service action and shall terminate with a RESERVATION
+ * CONFLICT status.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+ pr_err("Received PERSISTENT_RESERVE CDB while legacy"
+ " SPC-2 reservation is held, returning"
+ " RESERVATION_CONFLICT\n");
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EINVAL;
+ }
+
+ switch (cmd->t_task_cdb[1] & 0x1f) {
+ case PRI_READ_KEYS:
+ ret = core_scsi3_pri_read_keys(cmd);
+ break;
+ case PRI_READ_RESERVATION:
+ ret = core_scsi3_pri_read_reservation(cmd);
+ break;
+ case PRI_REPORT_CAPABILITIES:
+ ret = core_scsi3_pri_report_capabilities(cmd);
+ break;
+ case PRI_READ_FULL_STATUS:
+ ret = core_scsi3_pri_read_full_status(cmd);
+ break;
+ default:
+ pr_err("Unknown PERSISTENT_RESERVE_IN service"
+ " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f);
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ ret = -EINVAL;
+ break;
+ }
+
+ if (!ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return ret;
+}
+
+static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)
+{
+ return 0;
+}
+
+static int core_pt_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ return 0;
+}
+
+int core_setup_reservations(struct se_device *dev, int force_pt)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_reservation *rest = &su_dev->t10_pr;
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, use the reservations
+ * of the Underlying SCSI hardware. In Linux/SCSI terms, this can
+ * cause a problem because libata and some SATA RAID HBAs appear
+ * under Linux/SCSI, but to emulate reservations themselves.
+ */
+ if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
+ !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) {
+ rest->res_type = SPC_PASSTHROUGH;
+ rest->pr_ops.t10_reservation_check = &core_pt_reservation_check;
+ rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder;
+ pr_debug("%s: Using SPC_PASSTHROUGH, no reservation"
+ " emulation\n", dev->transport->name);
+ return 0;
+ }
+ /*
+ * If SPC-3 or above is reported by real or emulated struct se_device,
+ * use emulated Persistent Reservations.
+ */
+ if (dev->transport->get_device_rev(dev) >= SCSI_3) {
+ rest->res_type = SPC3_PERSISTENT_RESERVATIONS;
+ rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check;
+ rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder;
+ pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS"
+ " emulation\n", dev->transport->name);
+ } else {
+ rest->res_type = SPC2_RESERVATIONS;
+ rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check;
+ rest->pr_ops.t10_seq_non_holder =
+ &core_scsi2_reservation_seq_non_holder;
+ pr_debug("%s: Using SPC2_RESERVATIONS emulation\n",
+ dev->transport->name);
+ }
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.h
new file mode 100644
index 0000000..7a233fe
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pr.h
@@ -0,0 +1,68 @@
+#ifndef TARGET_CORE_PR_H
+#define TARGET_CORE_PR_H
+/*
+ * PERSISTENT_RESERVE_OUT service action codes
+ *
+ * spc4r17 section 6.14.2 Table 171
+ */
+#define PRO_REGISTER 0x00
+#define PRO_RESERVE 0x01
+#define PRO_RELEASE 0x02
+#define PRO_CLEAR 0x03
+#define PRO_PREEMPT 0x04
+#define PRO_PREEMPT_AND_ABORT 0x05
+#define PRO_REGISTER_AND_IGNORE_EXISTING_KEY 0x06
+#define PRO_REGISTER_AND_MOVE 0x07
+/*
+ * PERSISTENT_RESERVE_IN service action codes
+ *
+ * spc4r17 section 6.13.1 Table 159
+ */
+#define PRI_READ_KEYS 0x00
+#define PRI_READ_RESERVATION 0x01
+#define PRI_REPORT_CAPABILITIES 0x02
+#define PRI_READ_FULL_STATUS 0x03
+/*
+ * PERSISTENT_RESERVE_ SCOPE field
+ *
+ * spc4r17 section 6.13.3.3 Table 163
+ */
+#define PR_SCOPE_LU_SCOPE 0x00
+/*
+ * PERSISTENT_RESERVE_* TYPE field
+ *
+ * spc4r17 section 6.13.3.4 Table 164
+ */
+#define PR_TYPE_WRITE_EXCLUSIVE 0x01
+#define PR_TYPE_EXCLUSIVE_ACCESS 0x03
+#define PR_TYPE_WRITE_EXCLUSIVE_REGONLY 0x05
+#define PR_TYPE_EXCLUSIVE_ACCESS_REGONLY 0x06
+#define PR_TYPE_WRITE_EXCLUSIVE_ALLREG 0x07
+#define PR_TYPE_EXCLUSIVE_ACCESS_ALLREG 0x08
+
+#define PR_APTPL_MAX_IPORT_LEN 256
+#define PR_APTPL_MAX_TPORT_LEN 256
+
+extern struct kmem_cache *t10_pr_reg_cache;
+
+extern int core_pr_dump_initiator_port(struct t10_pr_registration *,
+ char *, u32);
+extern int target_scsi2_reservation_release(struct se_task *task);
+extern int target_scsi2_reservation_reserve(struct se_task *task);
+extern int core_scsi3_alloc_aptpl_registration(
+ struct t10_reservation *, u64,
+ unsigned char *, unsigned char *, u32,
+ unsigned char *, u16, u32, int, int, u8);
+extern int core_scsi3_check_aptpl_registration(struct se_device *,
+ struct se_portal_group *, struct se_lun *,
+ struct se_lun_acl *);
+extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
+ struct se_node_acl *);
+extern void core_scsi3_free_all_registrations(struct se_device *);
+extern unsigned char *core_scsi3_pr_dump_type(int);
+
+extern int target_scsi3_emulate_pr_in(struct se_task *task);
+extern int target_scsi3_emulate_pr_out(struct se_task *task);
+extern int core_setup_reservations(struct se_device *, int);
+
+#endif /* TARGET_CORE_PR_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.c
new file mode 100644
index 0000000..ec7e71c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.c
@@ -0,0 +1,1267 @@
+/*******************************************************************************
+ * Filename: target_core_pscsi.c
+ *
+ * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/blk_types.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/genhd.h>
+#include <linux/cdrom.h>
+#include <linux/file.h>
+#include <linux/module.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+
+#include "target_core_pscsi.h"
+
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+static struct se_subsystem_api pscsi_template;
+
+static void pscsi_req_done(struct request *, int);
+
+/* pscsi_attach_hba():
+ *
+ * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
+ * from the passed SCSI Host ID.
+ */
+static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct pscsi_hba_virt *phv;
+
+ phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL);
+ if (!phv) {
+ pr_err("Unable to allocate struct pscsi_hba_virt\n");
+ return -ENOMEM;
+ }
+ phv->phv_host_id = host_id;
+ phv->phv_mode = PHV_VIRTUAL_HOST_ID;
+
+ hba->hba_ptr = phv;
+
+ pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ PSCSI_VERSION, TARGET_CORE_MOD_VERSION);
+ pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
+ hba->hba_id);
+
+ return 0;
+}
+
+static void pscsi_detach_hba(struct se_hba *hba)
+{
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct Scsi_Host *scsi_host = phv->phv_lld_host;
+
+ if (scsi_host) {
+ scsi_host_put(scsi_host);
+
+ pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from"
+ " Generic Target Core\n", hba->hba_id,
+ (scsi_host->hostt->name) ? (scsi_host->hostt->name) :
+ "Unknown");
+ } else
+ pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA"
+ " from Generic Target Core\n", hba->hba_id);
+
+ kfree(phv);
+ hba->hba_ptr = NULL;
+}
+
+static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag)
+{
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct Scsi_Host *sh = phv->phv_lld_host;
+ /*
+ * Release the struct Scsi_Host
+ */
+ if (!mode_flag) {
+ if (!sh)
+ return 0;
+
+ phv->phv_lld_host = NULL;
+ phv->phv_mode = PHV_VIRTUAL_HOST_ID;
+
+ pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
+ " %s\n", hba->hba_id, (sh->hostt->name) ?
+ (sh->hostt->name) : "Unknown");
+
+ scsi_host_put(sh);
+ return 0;
+ }
+ /*
+ * Otherwise, locate struct Scsi_Host from the original passed
+ * pSCSI Host ID and enable for phba mode
+ */
+ sh = scsi_host_lookup(phv->phv_host_id);
+ if (!sh) {
+ pr_err("pSCSI: Unable to locate SCSI Host for"
+ " phv_host_id: %d\n", phv->phv_host_id);
+ return -EINVAL;
+ }
+
+ phv->phv_lld_host = sh;
+ phv->phv_mode = PHV_LLD_SCSI_HOST_NO;
+
+ pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
+ hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown");
+
+ return 1;
+}
+
+static void pscsi_tape_read_blocksize(struct se_device *dev,
+ struct scsi_device *sdev)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf;
+ int ret;
+
+ buf = kzalloc(12, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = MODE_SENSE;
+ cdb[4] = 0x0c; /* 12 bytes */
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL,
+ HZ, 1, NULL);
+ if (ret)
+ goto out_free;
+
+ /*
+ * If MODE_SENSE still returns zero, set the default value to 1024.
+ */
+ sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]);
+ if (!sdev->sector_size)
+ sdev->sector_size = 1024;
+out_free:
+ kfree(buf);
+}
+
+static void
+pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn)
+{
+ unsigned char *buf;
+
+ if (sdev->inquiry_len < INQUIRY_LEN)
+ return;
+
+ buf = sdev->inquiry;
+ if (!buf)
+ return;
+ /*
+ * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev()
+ */
+ memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor));
+ memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model));
+ memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision));
+}
+
+static int
+pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf;
+ int ret;
+
+ buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = INQUIRY;
+ cdb[1] = 0x01; /* Query VPD */
+ cdb[2] = 0x80; /* Unit Serial Number */
+ cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff;
+ cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff);
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
+ INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL);
+ if (ret)
+ goto out_free;
+
+ snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
+
+ wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL;
+
+ kfree(buf);
+ return 0;
+
+out_free:
+ kfree(buf);
+ return -EPERM;
+}
+
+static void
+pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
+ struct t10_wwn *wwn)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83;
+ int ident_len, page_len, off = 4, ret;
+ struct t10_vpd *vpd;
+
+ buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = INQUIRY;
+ cdb[1] = 0x01; /* Query VPD */
+ cdb[2] = 0x83; /* Device Identifier */
+ cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff;
+ cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff);
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
+ INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
+ NULL, HZ, 1, NULL);
+ if (ret)
+ goto out;
+
+ page_len = (buf[2] << 8) | buf[3];
+ while (page_len > 0) {
+ /* Grab a pointer to the Identification descriptor */
+ page_83 = &buf[off];
+ ident_len = page_83[3];
+ if (!ident_len) {
+ pr_err("page_83[3]: identifier"
+ " length zero!\n");
+ break;
+ }
+ pr_debug("T10 VPD Identifer Length: %d\n", ident_len);
+
+ vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL);
+ if (!vpd) {
+ pr_err("Unable to allocate memory for"
+ " struct t10_vpd\n");
+ goto out;
+ }
+ INIT_LIST_HEAD(&vpd->vpd_list);
+
+ transport_set_vpd_proto_id(vpd, page_83);
+ transport_set_vpd_assoc(vpd, page_83);
+
+ if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ kfree(vpd);
+ continue;
+ }
+ if (transport_set_vpd_ident(vpd, page_83) < 0) {
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ kfree(vpd);
+ continue;
+ }
+
+ list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ }
+
+out:
+ kfree(buf);
+}
+
+/* pscsi_add_device_to_list():
+ *
+ *
+ */
+static struct se_device *pscsi_add_device_to_list(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ struct pscsi_dev_virt *pdv,
+ struct scsi_device *sd,
+ int dev_flags)
+{
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct request_queue *q;
+ struct queue_limits *limits;
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ if (!sd->queue_depth) {
+ sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
+
+ pr_err("Set broken SCSI Device %d:%d:%d"
+ " queue_depth to %d\n", sd->channel, sd->id,
+ sd->lun, sd->queue_depth);
+ }
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = sd->request_queue;
+ limits = &dev_limits.limits;
+ limits->logical_block_size = sd->sector_size;
+ limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q));
+ limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q));
+ dev_limits.hw_queue_depth = sd->queue_depth;
+ dev_limits.queue_depth = sd->queue_depth;
+ /*
+ * Setup our standard INQUIRY info into se_dev->t10_wwn
+ */
+ pscsi_set_inquiry_info(sd, &se_dev->t10_wwn);
+
+ /*
+ * Set the pointer pdv->pdv_sd to from passed struct scsi_device,
+ * which has already been referenced with Linux SCSI code with
+ * scsi_device_get() in this file's pscsi_create_virtdevice().
+ *
+ * The passthrough operations called by the transport_add_device_*
+ * function below will require this pointer to be set for passthroug
+ * ops.
+ *
+ * For the shutdown case in pscsi_free_device(), this struct
+ * scsi_device reference is released with Linux SCSI code
+ * scsi_device_put() and the pdv->pdv_sd cleared.
+ */
+ pdv->pdv_sd = sd;
+ dev = transport_add_device_to_core_hba(hba, &pscsi_template,
+ se_dev, dev_flags, pdv,
+ &dev_limits, NULL, NULL);
+ if (!dev) {
+ pdv->pdv_sd = NULL;
+ return NULL;
+ }
+
+ /*
+ * Locate VPD WWN Information used for various purposes within
+ * the Storage Engine.
+ */
+ if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) {
+ /*
+ * If VPD Unit Serial returned GOOD status, try
+ * VPD Device Identification page (0x83).
+ */
+ pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn);
+ }
+
+ /*
+ * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
+ */
+ if (sd->type == TYPE_TAPE)
+ pscsi_tape_read_blocksize(dev, sd);
+ return dev;
+}
+
+static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct pscsi_dev_virt *pdv;
+
+ pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL);
+ if (!pdv) {
+ pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
+ return NULL;
+ }
+ pdv->pdv_se_hba = hba;
+
+ pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name);
+ return pdv;
+}
+
+/*
+ * Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_disk(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+ __releases(sh->host_lock)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ struct block_device *bd;
+ u32 dev_flags = 0;
+
+ if (scsi_device_get(sd)) {
+ pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
+ sh->host_no, sd->channel, sd->id, sd->lun);
+ spin_unlock_irq(sh->host_lock);
+ return NULL;
+ }
+ spin_unlock_irq(sh->host_lock);
+ /*
+ * Claim exclusive struct block_device access to struct scsi_device
+ * for TYPE_DISK using supplied udev_path
+ */
+ bd = blkdev_get_by_path(se_dev->se_dev_udev_path,
+ FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv);
+ if (IS_ERR(bd)) {
+ pr_err("pSCSI: blkdev_get_by_path() failed\n");
+ scsi_device_put(sd);
+ return NULL;
+ }
+ pdv->pdv_bd = bd;
+
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!dev) {
+ blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+ scsi_device_put(sd);
+ return NULL;
+ }
+ pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n",
+ phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+/*
+ * Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_rom(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+ __releases(sh->host_lock)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ u32 dev_flags = 0;
+
+ if (scsi_device_get(sd)) {
+ pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
+ sh->host_no, sd->channel, sd->id, sd->lun);
+ spin_unlock_irq(sh->host_lock);
+ return NULL;
+ }
+ spin_unlock_irq(sh->host_lock);
+
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!dev) {
+ scsi_device_put(sd);
+ return NULL;
+ }
+ pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
+ phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
+ sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+/*
+ *Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_other(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+ __releases(sh->host_lock)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ u32 dev_flags = 0;
+
+ spin_unlock_irq(sh->host_lock);
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!dev)
+ return NULL;
+
+ pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
+ phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
+ sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+static struct se_device *pscsi_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ struct pscsi_dev_virt *pdv = p;
+ struct se_device *dev;
+ struct scsi_device *sd;
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct Scsi_Host *sh = phv->phv_lld_host;
+ int legacy_mode_enable = 0;
+
+ if (!pdv) {
+ pr_err("Unable to locate struct pscsi_dev_virt"
+ " parameter\n");
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
+ * struct Scsi_Host we will need to bring the TCM/pSCSI object online
+ */
+ if (!sh) {
+ if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
+ pr_err("pSCSI: Unable to locate struct"
+ " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
+ return ERR_PTR(-ENODEV);
+ }
+ /*
+ * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
+ * reference, we enforce that udev_path has been set
+ */
+ if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) {
+ pr_err("pSCSI: udev_path attribute has not"
+ " been set before ENABLE=1\n");
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
+ * use the original TCM hba ID to reference Linux/SCSI Host No
+ * and enable for PHV_LLD_SCSI_HOST_NO mode.
+ */
+ if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
+ spin_lock(&hba->device_lock);
+ if (!list_empty(&hba->hba_dev_list)) {
+ pr_err("pSCSI: Unable to set hba_mode"
+ " with active devices\n");
+ spin_unlock(&hba->device_lock);
+ return ERR_PTR(-EEXIST);
+ }
+ spin_unlock(&hba->device_lock);
+
+ if (pscsi_pmode_enable_hba(hba, 1) != 1)
+ return ERR_PTR(-ENODEV);
+
+ legacy_mode_enable = 1;
+ hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
+ sh = phv->phv_lld_host;
+ } else {
+ sh = scsi_host_lookup(pdv->pdv_host_id);
+ if (!sh) {
+ pr_err("pSCSI: Unable to locate"
+ " pdv_host_id: %d\n", pdv->pdv_host_id);
+ return ERR_PTR(-EINVAL);
+ }
+ pdv->pdv_lld_host = sh;
+ }
+ } else {
+ if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
+ pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
+ " struct Scsi_Host exists\n");
+ return ERR_PTR(-EEXIST);
+ }
+ }
+
+ spin_lock_irq(sh->host_lock);
+ list_for_each_entry(sd, &sh->__devices, siblings) {
+ if ((pdv->pdv_channel_id != sd->channel) ||
+ (pdv->pdv_target_id != sd->id) ||
+ (pdv->pdv_lun_id != sd->lun))
+ continue;
+ /*
+ * Functions will release the held struct scsi_host->host_lock
+ * before calling calling pscsi_add_device_to_list() to register
+ * struct scsi_device with target_core_mod.
+ */
+ switch (sd->type) {
+ case TYPE_DISK:
+ dev = pscsi_create_type_disk(sd, pdv, se_dev, hba);
+ break;
+ case TYPE_ROM:
+ dev = pscsi_create_type_rom(sd, pdv, se_dev, hba);
+ break;
+ default:
+ dev = pscsi_create_type_other(sd, pdv, se_dev, hba);
+ break;
+ }
+
+ if (!dev) {
+ if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
+ scsi_host_put(sh);
+ else if (legacy_mode_enable) {
+ pscsi_pmode_enable_hba(hba, 0);
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+ }
+ pdv->pdv_sd = NULL;
+ return ERR_PTR(-ENODEV);
+ }
+ return dev;
+ }
+ spin_unlock_irq(sh->host_lock);
+
+ pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no,
+ pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id);
+
+ if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
+ scsi_host_put(sh);
+ else if (legacy_mode_enable) {
+ pscsi_pmode_enable_hba(hba, 0);
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+ }
+
+ return ERR_PTR(-ENODEV);
+}
+
+/* pscsi_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void pscsi_free_device(void *p)
+{
+ struct pscsi_dev_virt *pdv = p;
+ struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ if (sd) {
+ /*
+ * Release exclusive pSCSI internal struct block_device claim for
+ * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
+ */
+ if ((sd->type == TYPE_DISK) && pdv->pdv_bd) {
+ blkdev_put(pdv->pdv_bd,
+ FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+ pdv->pdv_bd = NULL;
+ }
+ /*
+ * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
+ * to struct Scsi_Host now.
+ */
+ if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
+ (phv->phv_lld_host != NULL))
+ scsi_host_put(phv->phv_lld_host);
+ else if (pdv->pdv_lld_host)
+ scsi_host_put(pdv->pdv_lld_host);
+
+ if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM))
+ scsi_device_put(sd);
+
+ pdv->pdv_sd = NULL;
+ }
+
+ kfree(pdv);
+}
+
+static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task)
+{
+ return container_of(task, struct pscsi_plugin_task, pscsi_task);
+}
+
+
+/* pscsi_transport_complete():
+ *
+ *
+ */
+static int pscsi_transport_complete(struct se_task *task)
+{
+ struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+ int result;
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ unsigned char *cdb = &pt->pscsi_cdb[0];
+
+ result = pt->pscsi_result;
+ /*
+ * Hack to make sure that Write-Protect modepage is set if R/O mode is
+ * forced.
+ */
+ if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
+ (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ if (!task->task_se_cmd->se_deve)
+ goto after_mode_sense;
+
+ if (task->task_se_cmd->se_deve->lun_flags &
+ TRANSPORT_LUNFLAGS_READ_ONLY) {
+ unsigned char *buf = transport_kmap_data_sg(task->task_se_cmd);
+
+ if (cdb[0] == MODE_SENSE_10) {
+ if (!(buf[3] & 0x80))
+ buf[3] |= 0x80;
+ } else {
+ if (!(buf[2] & 0x80))
+ buf[2] |= 0x80;
+ }
+
+ transport_kunmap_data_sg(task->task_se_cmd);
+ }
+ }
+after_mode_sense:
+
+ if (sd->type != TYPE_TAPE)
+ goto after_mode_select;
+
+ /*
+ * Hack to correctly obtain the initiator requested blocksize for
+ * TYPE_TAPE. Since this value is dependent upon each tape media,
+ * struct scsi_device->sector_size will not contain the correct value
+ * by default, so we go ahead and set it so
+ * TRANSPORT(dev)->get_blockdev() returns the correct value to the
+ * storage engine.
+ */
+ if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
+ (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ unsigned char *buf;
+ struct scatterlist *sg = task->task_sg;
+ u16 bdl;
+ u32 blocksize;
+
+ buf = sg_virt(&sg[0]);
+ if (!buf) {
+ pr_err("Unable to get buf for scatterlist\n");
+ goto after_mode_select;
+ }
+
+ if (cdb[0] == MODE_SELECT)
+ bdl = (buf[3]);
+ else
+ bdl = (buf[6] << 8) | (buf[7]);
+
+ if (!bdl)
+ goto after_mode_select;
+
+ if (cdb[0] == MODE_SELECT)
+ blocksize = (buf[9] << 16) | (buf[10] << 8) |
+ (buf[11]);
+ else
+ blocksize = (buf[13] << 16) | (buf[14] << 8) |
+ (buf[15]);
+
+ sd->sector_size = blocksize;
+ }
+after_mode_select:
+
+ if (status_byte(result) & CHECK_CONDITION)
+ return 1;
+
+ return 0;
+}
+
+static struct se_task *
+pscsi_alloc_task(unsigned char *cdb)
+{
+ struct pscsi_plugin_task *pt;
+
+ /*
+ * Dynamically alloc cdb space, since it may be larger than
+ * TCM_MAX_COMMAND_SIZE
+ */
+ pt = kzalloc(sizeof(*pt) + scsi_command_size(cdb), GFP_KERNEL);
+ if (!pt) {
+ pr_err("Unable to allocate struct pscsi_plugin_task\n");
+ return NULL;
+ }
+
+ return &pt->pscsi_task;
+}
+
+static void pscsi_free_task(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ /*
+ * We do not release the bio(s) here associated with this task, as
+ * this is handled by bio_put() and pscsi_bi_endio().
+ */
+ kfree(pt);
+}
+
+enum {
+ Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
+ Opt_scsi_lun_id, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_scsi_host_id, "scsi_host_id=%d"},
+ {Opt_scsi_channel_id, "scsi_channel_id=%d"},
+ {Opt_scsi_target_id, "scsi_target_id=%d"},
+ {Opt_scsi_lun_id, "scsi_lun_id=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page,
+ ssize_t count)
+{
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_scsi_host_id:
+ if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
+ pr_err("PSCSI[%d]: Unable to accept"
+ " scsi_host_id while phv_mode =="
+ " PHV_LLD_SCSI_HOST_NO\n",
+ phv->phv_host_id);
+ ret = -EINVAL;
+ goto out;
+ }
+ match_int(args, &arg);
+ pdv->pdv_host_id = arg;
+ pr_debug("PSCSI[%d]: Referencing SCSI Host ID:"
+ " %d\n", phv->phv_host_id, pdv->pdv_host_id);
+ pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID;
+ break;
+ case Opt_scsi_channel_id:
+ match_int(args, &arg);
+ pdv->pdv_channel_id = arg;
+ pr_debug("PSCSI[%d]: Referencing SCSI Channel"
+ " ID: %d\n", phv->phv_host_id,
+ pdv->pdv_channel_id);
+ pdv->pdv_flags |= PDF_HAS_CHANNEL_ID;
+ break;
+ case Opt_scsi_target_id:
+ match_int(args, &arg);
+ pdv->pdv_target_id = arg;
+ pr_debug("PSCSI[%d]: Referencing SCSI Target"
+ " ID: %d\n", phv->phv_host_id,
+ pdv->pdv_target_id);
+ pdv->pdv_flags |= PDF_HAS_TARGET_ID;
+ break;
+ case Opt_scsi_lun_id:
+ match_int(args, &arg);
+ pdv->pdv_lun_id = arg;
+ pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:"
+ " %d\n", phv->phv_host_id, pdv->pdv_lun_id);
+ pdv->pdv_flags |= PDF_HAS_LUN_ID;
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t pscsi_check_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev)
+{
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+
+ if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
+ !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
+ !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
+ pr_err("Missing scsi_channel_id=, scsi_target_id= and"
+ " scsi_lun_id= parameters\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+ unsigned char host_id[16];
+ ssize_t bl;
+ int i;
+
+ if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
+ snprintf(host_id, 16, "%d", pdv->pdv_host_id);
+ else
+ snprintf(host_id, 16, "PHBA Mode");
+
+ bl = sprintf(b, "SCSI Device Bus Location:"
+ " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
+ pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id,
+ host_id);
+
+ if (sd) {
+ bl += sprintf(b + bl, " ");
+ bl += sprintf(b + bl, "Vendor: ");
+ for (i = 0; i < 8; i++) {
+ if (ISPRINT(sd->vendor[i])) /* printable character? */
+ bl += sprintf(b + bl, "%c", sd->vendor[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, " Model: ");
+ for (i = 0; i < 16; i++) {
+ if (ISPRINT(sd->model[i])) /* printable character ? */
+ bl += sprintf(b + bl, "%c", sd->model[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, " Rev: ");
+ for (i = 0; i < 4; i++) {
+ if (ISPRINT(sd->rev[i])) /* printable character ? */
+ bl += sprintf(b + bl, "%c", sd->rev[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, "\n");
+ }
+ return bl;
+}
+
+static void pscsi_bi_endio(struct bio *bio, int error)
+{
+ bio_put(bio);
+}
+
+static inline struct bio *pscsi_get_bio(int sg_num)
+{
+ struct bio *bio;
+ /*
+ * Use bio_malloc() following the comment in for bio -> struct request
+ * in block/blk-core.c:blk_make_request()
+ */
+ bio = bio_kmalloc(GFP_KERNEL, sg_num);
+ if (!bio) {
+ pr_err("PSCSI: bio_kmalloc() failed\n");
+ return NULL;
+ }
+ bio->bi_end_io = pscsi_bi_endio;
+
+ return bio;
+}
+
+static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg,
+ struct bio **hbio)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
+ u32 task_sg_num = task->task_sg_nents;
+ struct bio *bio = NULL, *tbio = NULL;
+ struct page *page;
+ struct scatterlist *sg;
+ u32 data_len = task->task_size, i, len, bytes, off;
+ int nr_pages = (task->task_size + task_sg[0].offset +
+ PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int nr_vecs = 0, rc;
+ int rw = (task->task_data_direction == DMA_TO_DEVICE);
+
+ *hbio = NULL;
+
+ pr_debug("PSCSI: nr_pages: %d\n", nr_pages);
+
+ for_each_sg(task_sg, sg, task_sg_num, i) {
+ page = sg_page(sg);
+ off = sg->offset;
+ len = sg->length;
+
+ pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i,
+ page, len, off);
+
+ while (len > 0 && data_len > 0) {
+ bytes = min_t(unsigned int, len, PAGE_SIZE - off);
+ bytes = min(bytes, data_len);
+
+ if (!bio) {
+ nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
+ nr_pages -= nr_vecs;
+ /*
+ * Calls bio_kmalloc() and sets bio->bi_end_io()
+ */
+ bio = pscsi_get_bio(nr_vecs);
+ if (!bio)
+ goto fail;
+
+ if (rw)
+ bio->bi_rw |= REQ_WRITE;
+
+ pr_debug("PSCSI: Allocated bio: %p,"
+ " dir: %s nr_vecs: %d\n", bio,
+ (rw) ? "rw" : "r", nr_vecs);
+ /*
+ * Set *hbio pointer to handle the case:
+ * nr_pages > BIO_MAX_PAGES, where additional
+ * bios need to be added to complete a given
+ * struct se_task
+ */
+ if (!*hbio)
+ *hbio = tbio = bio;
+ else
+ tbio = tbio->bi_next = bio;
+ }
+
+ pr_debug("PSCSI: Calling bio_add_pc_page() i: %d"
+ " bio: %p page: %p len: %d off: %d\n", i, bio,
+ page, len, off);
+
+ rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
+ bio, page, bytes, off);
+ if (rc != bytes)
+ goto fail;
+
+ pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
+ bio->bi_vcnt, nr_vecs);
+
+ if (bio->bi_vcnt > nr_vecs) {
+ pr_debug("PSCSI: Reached bio->bi_vcnt max:"
+ " %d i: %d bio: %p, allocating another"
+ " bio\n", bio->bi_vcnt, i, bio);
+ /*
+ * Clear the pointer so that another bio will
+ * be allocated with pscsi_get_bio() above, the
+ * current bio has already been set *tbio and
+ * bio->bi_next.
+ */
+ bio = NULL;
+ }
+
+ len -= bytes;
+ data_len -= bytes;
+ off = 0;
+ }
+ }
+
+ return task->task_sg_nents;
+fail:
+ while (*hbio) {
+ bio = *hbio;
+ *hbio = (*hbio)->bi_next;
+ bio->bi_next = NULL;
+ bio_endio(bio, 0); /* XXX: should be error */
+ }
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+}
+
+static int pscsi_do_task(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct request *req;
+ struct bio *hbio;
+ int ret;
+
+ target_get_task_cdb(task, pt->pscsi_cdb);
+
+ if (task->task_se_cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) {
+ req = blk_get_request(pdv->pdv_sd->request_queue,
+ (task->task_data_direction == DMA_TO_DEVICE),
+ GFP_KERNEL);
+ if (!req || IS_ERR(req)) {
+ pr_err("PSCSI: blk_get_request() failed: %ld\n",
+ req ? IS_ERR(req) : -ENOMEM);
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENODEV;
+ }
+ } else {
+ BUG_ON(!task->task_size);
+
+ /*
+ * Setup the main struct request for the task->task_sg[] payload
+ */
+ ret = pscsi_map_sg(task, task->task_sg, &hbio);
+ if (ret < 0) {
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return ret;
+ }
+
+ req = blk_make_request(pdv->pdv_sd->request_queue, hbio,
+ GFP_KERNEL);
+ if (IS_ERR(req)) {
+ pr_err("pSCSI: blk_make_request() failed\n");
+ goto fail;
+ }
+ }
+
+ req->cmd_type = REQ_TYPE_BLOCK_PC;
+ req->end_io = pscsi_req_done;
+ req->end_io_data = task;
+ req->cmd_len = scsi_command_size(pt->pscsi_cdb);
+ req->cmd = &pt->pscsi_cdb[0];
+ req->sense = &pt->pscsi_sense[0];
+ req->sense_len = 0;
+ if (pdv->pdv_sd->type == TYPE_DISK)
+ req->timeout = PS_TIMEOUT_DISK;
+ else
+ req->timeout = PS_TIMEOUT_OTHER;
+ req->retries = PS_RETRY;
+
+ blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
+ (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG),
+ pscsi_req_done);
+
+ return 0;
+
+fail:
+ while (hbio) {
+ struct bio *bio = hbio;
+ hbio = hbio->bi_next;
+ bio->bi_next = NULL;
+ bio_endio(bio, 0); /* XXX: should be error */
+ }
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+}
+
+/* pscsi_get_sense_buffer():
+ *
+ *
+ */
+static unsigned char *pscsi_get_sense_buffer(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ return pt->pscsi_sense;
+}
+
+/* pscsi_get_device_rev():
+ *
+ *
+ */
+static u32 pscsi_get_device_rev(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1;
+}
+
+/* pscsi_get_device_type():
+ *
+ *
+ */
+static u32 pscsi_get_device_type(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ return (sd) ? sd->type : TYPE_NO_LUN;
+}
+
+static sector_t pscsi_get_blocks(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+
+ if (pdv->pdv_bd && pdv->pdv_bd->bd_part)
+ return pdv->pdv_bd->bd_part->nr_sects;
+
+ dump_stack();
+ return 0;
+}
+
+/* pscsi_handle_SAM_STATUS_failures():
+ *
+ *
+ */
+static inline void pscsi_process_SAM_status(
+ struct se_task *task,
+ struct pscsi_plugin_task *pt)
+{
+ task->task_scsi_status = status_byte(pt->pscsi_result);
+ if (task->task_scsi_status) {
+ task->task_scsi_status <<= 1;
+ pr_debug("PSCSI Status Byte exception at task: %p CDB:"
+ " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+ pt->pscsi_result);
+ }
+
+ switch (host_byte(pt->pscsi_result)) {
+ case DID_OK:
+ transport_complete_task(task, (!task->task_scsi_status));
+ break;
+ default:
+ pr_debug("PSCSI Host Byte exception at task: %p CDB:"
+ " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+ pt->pscsi_result);
+ task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
+ task->task_se_cmd->scsi_sense_reason =
+ TCM_UNSUPPORTED_SCSI_OPCODE;
+ transport_complete_task(task, 0);
+ break;
+ }
+}
+
+static void pscsi_req_done(struct request *req, int uptodate)
+{
+ struct se_task *task = req->end_io_data;
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ pt->pscsi_result = req->errors;
+ pt->pscsi_resid = req->resid_len;
+
+ pscsi_process_SAM_status(task, pt);
+ __blk_put_request(req->q, req);
+}
+
+static struct se_subsystem_api pscsi_template = {
+ .name = "pscsi",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV,
+ .attach_hba = pscsi_attach_hba,
+ .detach_hba = pscsi_detach_hba,
+ .pmode_enable_hba = pscsi_pmode_enable_hba,
+ .allocate_virtdevice = pscsi_allocate_virtdevice,
+ .create_virtdevice = pscsi_create_virtdevice,
+ .free_device = pscsi_free_device,
+ .transport_complete = pscsi_transport_complete,
+ .alloc_task = pscsi_alloc_task,
+ .do_task = pscsi_do_task,
+ .free_task = pscsi_free_task,
+ .check_configfs_dev_params = pscsi_check_configfs_dev_params,
+ .set_configfs_dev_params = pscsi_set_configfs_dev_params,
+ .show_configfs_dev_params = pscsi_show_configfs_dev_params,
+ .get_sense_buffer = pscsi_get_sense_buffer,
+ .get_device_rev = pscsi_get_device_rev,
+ .get_device_type = pscsi_get_device_type,
+ .get_blocks = pscsi_get_blocks,
+};
+
+static int __init pscsi_module_init(void)
+{
+ return transport_subsystem_register(&pscsi_template);
+}
+
+static void pscsi_module_exit(void)
+{
+ transport_subsystem_release(&pscsi_template);
+}
+
+MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(pscsi_module_init);
+module_exit(pscsi_module_exit);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.h
new file mode 100644
index 0000000..6c23c94
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_pscsi.h
@@ -0,0 +1,63 @@
+#ifndef TARGET_CORE_PSCSI_H
+#define TARGET_CORE_PSCSI_H
+
+#define PSCSI_VERSION "v4.0"
+
+/* used in pscsi_find_alloc_len() */
+#ifndef INQUIRY_DATA_SIZE
+#define INQUIRY_DATA_SIZE 0x24
+#endif
+
+/* used in pscsi_add_device_to_list() */
+#define PSCSI_DEFAULT_QUEUEDEPTH 1
+
+#define PS_RETRY 5
+#define PS_TIMEOUT_DISK (15*HZ)
+#define PS_TIMEOUT_OTHER (500*HZ)
+
+#include <linux/device.h>
+#include <scsi/scsi_driver.h>
+#include <scsi/scsi_device.h>
+#include <linux/kref.h>
+#include <linux/kobject.h>
+
+struct pscsi_plugin_task {
+ struct se_task pscsi_task;
+ unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
+ int pscsi_direction;
+ int pscsi_result;
+ u32 pscsi_resid;
+ unsigned char pscsi_cdb[0];
+} ____cacheline_aligned;
+
+#define PDF_HAS_CHANNEL_ID 0x01
+#define PDF_HAS_TARGET_ID 0x02
+#define PDF_HAS_LUN_ID 0x04
+#define PDF_HAS_VPD_UNIT_SERIAL 0x08
+#define PDF_HAS_VPD_DEV_IDENT 0x10
+#define PDF_HAS_VIRT_HOST_ID 0x20
+
+struct pscsi_dev_virt {
+ int pdv_flags;
+ int pdv_host_id;
+ int pdv_channel_id;
+ int pdv_target_id;
+ int pdv_lun_id;
+ struct block_device *pdv_bd;
+ struct scsi_device *pdv_sd;
+ struct Scsi_Host *pdv_lld_host;
+ struct se_hba *pdv_se_hba;
+} ____cacheline_aligned;
+
+typedef enum phv_modes {
+ PHV_VIRTUAL_HOST_ID,
+ PHV_LLD_SCSI_HOST_NO
+} phv_modes_t;
+
+struct pscsi_hba_virt {
+ int phv_host_id;
+ phv_modes_t phv_mode;
+ struct Scsi_Host *phv_lld_host;
+} ____cacheline_aligned;
+
+#endif /*** TARGET_CORE_PSCSI_H ***/
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.c
new file mode 100644
index 0000000..fa4e21b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.c
@@ -0,0 +1,577 @@
+/*******************************************************************************
+ * Filename: target_core_rd.c
+ *
+ * This file contains the Storage Engine <-> Ramdisk transport
+ * specific functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+
+#include "target_core_rd.h"
+
+static struct se_subsystem_api rd_mcp_template;
+
+/* rd_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int rd_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct rd_host *rd_host;
+
+ rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL);
+ if (!rd_host) {
+ pr_err("Unable to allocate memory for struct rd_host\n");
+ return -ENOMEM;
+ }
+
+ rd_host->rd_host_id = host_id;
+
+ hba->hba_ptr = rd_host;
+
+ pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ RD_HBA_VERSION, TARGET_CORE_MOD_VERSION);
+ pr_debug("CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic"
+ " MaxSectors: %u\n", hba->hba_id,
+ rd_host->rd_host_id, RD_MAX_SECTORS);
+
+ return 0;
+}
+
+static void rd_detach_hba(struct se_hba *hba)
+{
+ struct rd_host *rd_host = hba->hba_ptr;
+
+ pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from"
+ " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id);
+
+ kfree(rd_host);
+ hba->hba_ptr = NULL;
+}
+
+/* rd_release_device_space():
+ *
+ *
+ */
+static void rd_release_device_space(struct rd_dev *rd_dev)
+{
+ u32 i, j, page_count = 0, sg_per_table;
+ struct rd_dev_sg_table *sg_table;
+ struct page *pg;
+ struct scatterlist *sg;
+
+ if (!rd_dev->sg_table_array || !rd_dev->sg_table_count)
+ return;
+
+ sg_table = rd_dev->sg_table_array;
+
+ for (i = 0; i < rd_dev->sg_table_count; i++) {
+ sg = sg_table[i].sg_table;
+ sg_per_table = sg_table[i].rd_sg_count;
+
+ for (j = 0; j < sg_per_table; j++) {
+ pg = sg_page(&sg[j]);
+ if (pg) {
+ __free_page(pg);
+ page_count++;
+ }
+ }
+
+ kfree(sg);
+ }
+
+ pr_debug("CORE_RD[%u] - Released device space for Ramdisk"
+ " Device ID: %u, pages %u in %u tables total bytes %lu\n",
+ rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count,
+ rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE);
+
+ kfree(sg_table);
+ rd_dev->sg_table_array = NULL;
+ rd_dev->sg_table_count = 0;
+}
+
+
+/* rd_build_device_space():
+ *
+ *
+ */
+static int rd_build_device_space(struct rd_dev *rd_dev)
+{
+ u32 i = 0, j, page_offset = 0, sg_per_table, sg_tables, total_sg_needed;
+ u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE /
+ sizeof(struct scatterlist));
+ struct rd_dev_sg_table *sg_table;
+ struct page *pg;
+ struct scatterlist *sg;
+
+ if (rd_dev->rd_page_count <= 0) {
+ pr_err("Illegal page count: %u for Ramdisk device\n",
+ rd_dev->rd_page_count);
+ return -EINVAL;
+ }
+ total_sg_needed = rd_dev->rd_page_count;
+
+ sg_tables = (total_sg_needed / max_sg_per_table) + 1;
+
+ sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL);
+ if (!sg_table) {
+ pr_err("Unable to allocate memory for Ramdisk"
+ " scatterlist tables\n");
+ return -ENOMEM;
+ }
+
+ rd_dev->sg_table_array = sg_table;
+ rd_dev->sg_table_count = sg_tables;
+
+ while (total_sg_needed) {
+ sg_per_table = (total_sg_needed > max_sg_per_table) ?
+ max_sg_per_table : total_sg_needed;
+
+ sg = kzalloc(sg_per_table * sizeof(struct scatterlist),
+ GFP_KERNEL);
+ if (!sg) {
+ pr_err("Unable to allocate scatterlist array"
+ " for struct rd_dev\n");
+ return -ENOMEM;
+ }
+
+ sg_init_table(sg, sg_per_table);
+
+ sg_table[i].sg_table = sg;
+ sg_table[i].rd_sg_count = sg_per_table;
+ sg_table[i].page_start_offset = page_offset;
+ sg_table[i++].page_end_offset = (page_offset + sg_per_table)
+ - 1;
+
+ for (j = 0; j < sg_per_table; j++) {
+ pg = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
+ if (!pg) {
+ pr_err("Unable to allocate scatterlist"
+ " pages for struct rd_dev_sg_table\n");
+ return -ENOMEM;
+ }
+ sg_assign_page(&sg[j], pg);
+ sg[j].length = PAGE_SIZE;
+ }
+
+ page_offset += sg_per_table;
+ total_sg_needed -= sg_per_table;
+ }
+
+ pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of"
+ " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id,
+ rd_dev->rd_dev_id, rd_dev->rd_page_count,
+ rd_dev->sg_table_count);
+
+ return 0;
+}
+
+static void *rd_allocate_virtdevice(
+ struct se_hba *hba,
+ const char *name,
+ int rd_direct)
+{
+ struct rd_dev *rd_dev;
+ struct rd_host *rd_host = hba->hba_ptr;
+
+ rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL);
+ if (!rd_dev) {
+ pr_err("Unable to allocate memory for struct rd_dev\n");
+ return NULL;
+ }
+
+ rd_dev->rd_host = rd_host;
+ rd_dev->rd_direct = rd_direct;
+
+ return rd_dev;
+}
+
+static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ return rd_allocate_virtdevice(hba, name, 0);
+}
+
+/* rd_create_virtdevice():
+ *
+ *
+ */
+static struct se_device *rd_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p,
+ int rd_direct)
+{
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct rd_dev *rd_dev = p;
+ struct rd_host *rd_host = hba->hba_ptr;
+ int dev_flags = 0, ret;
+ char prod[16], rev[4];
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ ret = rd_build_device_space(rd_dev);
+ if (ret < 0)
+ goto fail;
+
+ snprintf(prod, 16, "RAMDISK-%s", (rd_dev->rd_direct) ? "DR" : "MCP");
+ snprintf(rev, 4, "%s", (rd_dev->rd_direct) ? RD_DR_VERSION :
+ RD_MCP_VERSION);
+
+ dev_limits.limits.logical_block_size = RD_BLOCKSIZE;
+ dev_limits.limits.max_hw_sectors = RD_MAX_SECTORS;
+ dev_limits.limits.max_sectors = RD_MAX_SECTORS;
+ dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
+ dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH;
+
+ dev = transport_add_device_to_core_hba(hba,
+ &rd_mcp_template, se_dev, dev_flags, rd_dev,
+ &dev_limits, prod, rev);
+ if (!dev)
+ goto fail;
+
+ rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
+ rd_dev->rd_queue_depth = dev->queue_depth;
+
+ pr_debug("CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of"
+ " %u pages in %u tables, %lu total bytes\n",
+ rd_host->rd_host_id, (!rd_dev->rd_direct) ? "MEMCPY" :
+ "DIRECT", rd_dev->rd_dev_id, rd_dev->rd_page_count,
+ rd_dev->sg_table_count,
+ (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
+
+ return dev;
+
+fail:
+ rd_release_device_space(rd_dev);
+ return ERR_PTR(ret);
+}
+
+static struct se_device *rd_MEMCPY_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ return rd_create_virtdevice(hba, se_dev, p, 0);
+}
+
+/* rd_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void rd_free_device(void *p)
+{
+ struct rd_dev *rd_dev = p;
+
+ rd_release_device_space(rd_dev);
+ kfree(rd_dev);
+}
+
+static inline struct rd_request *RD_REQ(struct se_task *task)
+{
+ return container_of(task, struct rd_request, rd_task);
+}
+
+static struct se_task *
+rd_alloc_task(unsigned char *cdb)
+{
+ struct rd_request *rd_req;
+
+ rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL);
+ if (!rd_req) {
+ pr_err("Unable to allocate struct rd_request\n");
+ return NULL;
+ }
+
+ return &rd_req->rd_task;
+}
+
+/* rd_get_sg_table():
+ *
+ *
+ */
+static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
+{
+ u32 i;
+ struct rd_dev_sg_table *sg_table;
+
+ for (i = 0; i < rd_dev->sg_table_count; i++) {
+ sg_table = &rd_dev->sg_table_array[i];
+ if ((sg_table->page_start_offset <= page) &&
+ (sg_table->page_end_offset >= page))
+ return sg_table;
+ }
+
+ pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n",
+ page);
+
+ return NULL;
+}
+
+static int rd_MEMCPY(struct rd_request *req, u32 read_rd)
+{
+ struct se_task *task = &req->rd_task;
+ struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr;
+ struct rd_dev_sg_table *table;
+ struct scatterlist *rd_sg;
+ struct sg_mapping_iter m;
+ u32 rd_offset = req->rd_offset;
+ u32 src_len;
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!table)
+ return -EINVAL;
+
+ rd_sg = &table->sg_table[req->rd_page - table->page_start_offset];
+
+ pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n",
+ dev->rd_dev_id, read_rd ? "Read" : "Write",
+ task->task_lba, req->rd_size, req->rd_page,
+ rd_offset);
+
+ src_len = PAGE_SIZE - rd_offset;
+ sg_miter_start(&m, task->task_sg, task->task_sg_nents,
+ read_rd ? SG_MITER_TO_SG : SG_MITER_FROM_SG);
+ while (req->rd_size) {
+ u32 len;
+ void *rd_addr;
+
+ sg_miter_next(&m);
+ len = min((u32)m.length, src_len);
+ m.consumed = len;
+
+ rd_addr = sg_virt(rd_sg) + rd_offset;
+
+ if (read_rd)
+ memcpy(m.addr, rd_addr, len);
+ else
+ memcpy(rd_addr, m.addr, len);
+
+ req->rd_size -= len;
+ if (!req->rd_size)
+ continue;
+
+ src_len -= len;
+ if (src_len) {
+ rd_offset += len;
+ continue;
+ }
+
+ /* rd page completed, next one please */
+ req->rd_page++;
+ rd_offset = 0;
+ src_len = PAGE_SIZE;
+ if (req->rd_page <= table->page_end_offset) {
+ rd_sg++;
+ continue;
+ }
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!table) {
+ sg_miter_stop(&m);
+ return -EINVAL;
+ }
+
+ /* since we increment, the first sg entry is correct */
+ rd_sg = table->sg_table;
+ }
+ sg_miter_stop(&m);
+ return 0;
+}
+
+/* rd_MEMCPY_do_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int rd_MEMCPY_do_task(struct se_task *task)
+{
+ struct se_device *dev = task->task_se_cmd->se_dev;
+ struct rd_request *req = RD_REQ(task);
+ u64 tmp;
+ int ret;
+
+ tmp = task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+ req->rd_offset = do_div(tmp, PAGE_SIZE);
+ req->rd_page = tmp;
+ req->rd_size = task->task_size;
+
+ ret = rd_MEMCPY(req, task->task_data_direction == DMA_FROM_DEVICE);
+ if (ret != 0)
+ return ret;
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+/* rd_free_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void rd_free_task(struct se_task *task)
+{
+ kfree(RD_REQ(task));
+}
+
+enum {
+ Opt_rd_pages, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_rd_pages, "rd_pages=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t rd_set_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page,
+ ssize_t count)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_rd_pages:
+ match_int(args, &arg);
+ rd_dev->rd_page_count = arg;
+ pr_debug("RAMDISK: Referencing Page"
+ " Count: %u\n", rd_dev->rd_page_count);
+ rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT;
+ break;
+ default:
+ break;
+ }
+ }
+
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+
+ if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
+ pr_debug("Missing rd_pages= parameter\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static ssize_t rd_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+ ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: %s\n",
+ rd_dev->rd_dev_id, (rd_dev->rd_direct) ?
+ "rd_direct" : "rd_mcp");
+ bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu"
+ " SG_table_count: %u\n", rd_dev->rd_page_count,
+ PAGE_SIZE, rd_dev->sg_table_count);
+ return bl;
+}
+
+static u32 rd_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+static u32 rd_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t rd_get_blocks(struct se_device *dev)
+{
+ struct rd_dev *rd_dev = dev->dev_ptr;
+ unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) /
+ dev->se_sub_dev->se_dev_attrib.block_size) - 1;
+
+ return blocks_long;
+}
+
+static struct se_subsystem_api rd_mcp_template = {
+ .name = "rd_mcp",
+ .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV,
+ .attach_hba = rd_attach_hba,
+ .detach_hba = rd_detach_hba,
+ .allocate_virtdevice = rd_MEMCPY_allocate_virtdevice,
+ .create_virtdevice = rd_MEMCPY_create_virtdevice,
+ .free_device = rd_free_device,
+ .alloc_task = rd_alloc_task,
+ .do_task = rd_MEMCPY_do_task,
+ .free_task = rd_free_task,
+ .check_configfs_dev_params = rd_check_configfs_dev_params,
+ .set_configfs_dev_params = rd_set_configfs_dev_params,
+ .show_configfs_dev_params = rd_show_configfs_dev_params,
+ .get_device_rev = rd_get_device_rev,
+ .get_device_type = rd_get_device_type,
+ .get_blocks = rd_get_blocks,
+};
+
+int __init rd_module_init(void)
+{
+ int ret;
+
+ ret = transport_subsystem_register(&rd_mcp_template);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+void rd_module_exit(void)
+{
+ transport_subsystem_release(&rd_mcp_template);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.h
new file mode 100644
index 0000000..784e56a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_rd.h
@@ -0,0 +1,65 @@
+#ifndef TARGET_CORE_RD_H
+#define TARGET_CORE_RD_H
+
+#define RD_HBA_VERSION "v4.0"
+#define RD_DR_VERSION "4.0"
+#define RD_MCP_VERSION "4.0"
+
+/* Largest piece of memory kmalloc can allocate */
+#define RD_MAX_ALLOCATION_SIZE 65536
+#define RD_DEVICE_QUEUE_DEPTH 32
+#define RD_MAX_DEVICE_QUEUE_DEPTH 128
+#define RD_BLOCKSIZE 512
+#define RD_MAX_SECTORS 1024
+
+/* Used in target_core_init_configfs() for virtual LUN 0 access */
+int __init rd_module_init(void);
+void rd_module_exit(void);
+
+#define RRF_EMULATE_CDB 0x01
+#define RRF_GOT_LBA 0x02
+
+struct rd_request {
+ struct se_task rd_task;
+
+ /* Offset from start of page */
+ u32 rd_offset;
+ /* Starting page in Ramdisk for request */
+ u32 rd_page;
+ /* Total number of pages needed for request */
+ u32 rd_page_count;
+ /* Scatterlist count */
+ u32 rd_size;
+} ____cacheline_aligned;
+
+struct rd_dev_sg_table {
+ u32 page_start_offset;
+ u32 page_end_offset;
+ u32 rd_sg_count;
+ struct scatterlist *sg_table;
+} ____cacheline_aligned;
+
+#define RDF_HAS_PAGE_COUNT 0x01
+
+struct rd_dev {
+ int rd_direct;
+ u32 rd_flags;
+ /* Unique Ramdisk Device ID in Ramdisk HBA */
+ u32 rd_dev_id;
+ /* Total page count for ramdisk device */
+ u32 rd_page_count;
+ /* Number of SG tables in sg_table_array */
+ u32 sg_table_count;
+ u32 rd_queue_depth;
+ /* Array of rd_dev_sg_table_t containing scatterlists */
+ struct rd_dev_sg_table *sg_table_array;
+ /* Ramdisk HBA device is connected to */
+ struct rd_host *rd_host;
+} ____cacheline_aligned;
+
+struct rd_host {
+ u32 rd_host_dev_id_count;
+ u32 rd_host_id; /* Unique Ramdisk Host ID */
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_RD_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_stat.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_stat.c
new file mode 100644
index 0000000..3d44beb
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_stat.c
@@ -0,0 +1,1794 @@
+/*******************************************************************************
+ * Filename: target_core_stat.c
+ *
+ * Copyright (c) 2011 Rising Tide Systems
+ * Copyright (c) 2011 Linux-iSCSI.org
+ *
+ * Modern ConfigFS group context specific statistics based on original
+ * target_core_mib.c code
+ *
+ * Copyright (c) 2006-2007 SBE, Inc. All Rights Reserved.
+ *
+ * Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/blkdev.h>
+#include <linux/configfs.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_internal.h"
+
+#ifndef INITIAL_JIFFIES
+#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
+#endif
+
+#define NONE "None"
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+#define SCSI_LU_INDEX 1
+#define LU_COUNT 1
+
+/*
+ * SCSI Device Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_dev, se_dev_stat_grps);
+#define DEV_STAT_SCSI_DEV_ATTR(_name, _mode) \
+static struct target_stat_scsi_dev_attribute \
+ target_stat_scsi_dev_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_dev_show_attr_##_name, \
+ target_stat_scsi_dev_store_attr_##_name);
+
+#define DEV_STAT_SCSI_DEV_ATTR_RO(_name) \
+static struct target_stat_scsi_dev_attribute \
+ target_stat_scsi_dev_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_dev_show_attr_##_name);
+
+static ssize_t target_stat_scsi_dev_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_dev_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_dev_show_attr_role(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "Target\n");
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(role);
+
+static ssize_t target_stat_scsi_dev_show_attr_ports(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_port_count);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(ports);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_dev, se_dev_stat_grps, scsi_dev_group);
+
+static struct configfs_attribute *target_stat_scsi_dev_attrs[] = {
+ &target_stat_scsi_dev_inst.attr,
+ &target_stat_scsi_dev_indx.attr,
+ &target_stat_scsi_dev_role.attr,
+ &target_stat_scsi_dev_ports.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_dev_attrib_ops = {
+ .show_attribute = target_stat_scsi_dev_attr_show,
+ .store_attribute = target_stat_scsi_dev_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_dev_cit = {
+ .ct_item_ops = &target_stat_scsi_dev_attrib_ops,
+ .ct_attrs = target_stat_scsi_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Target Device Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_tgt_dev, se_dev_stat_grps);
+#define DEV_STAT_SCSI_TGT_DEV_ATTR(_name, _mode) \
+static struct target_stat_scsi_tgt_dev_attribute \
+ target_stat_scsi_tgt_dev_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_tgt_dev_show_attr_##_name, \
+ target_stat_scsi_tgt_dev_store_attr_##_name);
+
+#define DEV_STAT_SCSI_TGT_DEV_ATTR_RO(_name) \
+static struct target_stat_scsi_tgt_dev_attribute \
+ target_stat_scsi_tgt_dev_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_tgt_dev_show_attr_##_name);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_num_lus(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", LU_COUNT);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(num_lus);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_status(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ char status[16];
+
+ if (!dev)
+ return -ENODEV;
+
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ strcpy(status, "activated");
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ strcpy(status, "deactivated");
+ break;
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ strcpy(status, "shutdown");
+ break;
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ strcpy(status, "offline");
+ break;
+ default:
+ sprintf(status, "unknown(%d)", dev->dev_status);
+ break;
+ }
+
+ return snprintf(page, PAGE_SIZE, "%s\n", status);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(status);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_non_access_lus(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int non_accessible_lus;
+
+ if (!dev)
+ return -ENODEV;
+
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ non_accessible_lus = 0;
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ default:
+ non_accessible_lus = 1;
+ break;
+ }
+
+ return snprintf(page, PAGE_SIZE, "%u\n", non_accessible_lus);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(non_access_lus);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_resets(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(resets);
+
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_tgt_dev, se_dev_stat_grps, scsi_tgt_dev_group);
+
+static struct configfs_attribute *target_stat_scsi_tgt_dev_attrs[] = {
+ &target_stat_scsi_tgt_dev_inst.attr,
+ &target_stat_scsi_tgt_dev_indx.attr,
+ &target_stat_scsi_tgt_dev_num_lus.attr,
+ &target_stat_scsi_tgt_dev_status.attr,
+ &target_stat_scsi_tgt_dev_non_access_lus.attr,
+ &target_stat_scsi_tgt_dev_resets.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_tgt_dev_attrib_ops = {
+ .show_attribute = target_stat_scsi_tgt_dev_attr_show,
+ .store_attribute = target_stat_scsi_tgt_dev_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_tgt_dev_cit = {
+ .ct_item_ops = &target_stat_scsi_tgt_dev_attrib_ops,
+ .ct_attrs = target_stat_scsi_tgt_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Logical Unit Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_lu, se_dev_stat_grps);
+#define DEV_STAT_SCSI_LU_ATTR(_name, _mode) \
+static struct target_stat_scsi_lu_attribute target_stat_scsi_lu_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_lu_show_attr_##_name, \
+ target_stat_scsi_lu_store_attr_##_name);
+
+#define DEV_STAT_SCSI_LU_ATTR_RO(_name) \
+static struct target_stat_scsi_lu_attribute target_stat_scsi_lu_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_lu_show_attr_##_name);
+
+static ssize_t target_stat_scsi_lu_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_lu_show_attr_dev(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_lu_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", SCSI_LU_INDEX);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_lu_show_attr_lun(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+ /* FIXME: scsiLuDefaultLun */
+ return snprintf(page, PAGE_SIZE, "%llu\n", (unsigned long long)0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(lun);
+
+static ssize_t target_stat_scsi_lu_show_attr_lu_name(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+ /* scsiLuWwnName */
+ return snprintf(page, PAGE_SIZE, "%s\n",
+ (strlen(dev->se_sub_dev->t10_wwn.unit_serial)) ?
+ dev->se_sub_dev->t10_wwn.unit_serial : "None");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(lu_name);
+
+static ssize_t target_stat_scsi_lu_show_attr_vend(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int i;
+ char str[sizeof(dev->se_sub_dev->t10_wwn.vendor)+1];
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuVendorId */
+ for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.vendor); i++)
+ str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.vendor[i]) ?
+ dev->se_sub_dev->t10_wwn.vendor[i] : ' ';
+ str[i] = '\0';
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(vend);
+
+static ssize_t target_stat_scsi_lu_show_attr_prod(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int i;
+ char str[sizeof(dev->se_sub_dev->t10_wwn.model)+1];
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuProductId */
+ for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.vendor); i++)
+ str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.model[i]) ?
+ dev->se_sub_dev->t10_wwn.model[i] : ' ';
+ str[i] = '\0';
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(prod);
+
+static ssize_t target_stat_scsi_lu_show_attr_rev(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int i;
+ char str[sizeof(dev->se_sub_dev->t10_wwn.revision)+1];
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuRevisionId */
+ for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.revision); i++)
+ str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.revision[i]) ?
+ dev->se_sub_dev->t10_wwn.revision[i] : ' ';
+ str[i] = '\0';
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(rev);
+
+static ssize_t target_stat_scsi_lu_show_attr_dev_type(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuPeripheralType */
+ return snprintf(page, PAGE_SIZE, "%u\n",
+ dev->transport->get_device_type(dev));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(dev_type);
+
+static ssize_t target_stat_scsi_lu_show_attr_status(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuStatus */
+ return snprintf(page, PAGE_SIZE, "%s\n",
+ (dev->dev_status == TRANSPORT_DEVICE_ACTIVATED) ?
+ "available" : "notavailable");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(status);
+
+static ssize_t target_stat_scsi_lu_show_attr_state_bit(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuState */
+ return snprintf(page, PAGE_SIZE, "exposed\n");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(state_bit);
+
+static ssize_t target_stat_scsi_lu_show_attr_num_cmds(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuNumCommands */
+ return snprintf(page, PAGE_SIZE, "%llu\n",
+ (unsigned long long)dev->num_cmds);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(num_cmds);
+
+static ssize_t target_stat_scsi_lu_show_attr_read_mbytes(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuReadMegaBytes */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->read_bytes >> 20));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(read_mbytes);
+
+static ssize_t target_stat_scsi_lu_show_attr_write_mbytes(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuWrittenMegaBytes */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->write_bytes >> 20));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(write_mbytes);
+
+static ssize_t target_stat_scsi_lu_show_attr_resets(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuInResets */
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(resets);
+
+static ssize_t target_stat_scsi_lu_show_attr_full_stat(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* FIXME: scsiLuOutTaskSetFullStatus */
+ return snprintf(page, PAGE_SIZE, "%u\n", 0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(full_stat);
+
+static ssize_t target_stat_scsi_lu_show_attr_hs_num_cmds(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* FIXME: scsiLuHSInCommands */
+ return snprintf(page, PAGE_SIZE, "%u\n", 0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(hs_num_cmds);
+
+static ssize_t target_stat_scsi_lu_show_attr_creation_time(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuCreationTime */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(((u32)dev->creation_time -
+ INITIAL_JIFFIES) * 100 / HZ));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(creation_time);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_lu, se_dev_stat_grps, scsi_lu_group);
+
+static struct configfs_attribute *target_stat_scsi_lu_attrs[] = {
+ &target_stat_scsi_lu_inst.attr,
+ &target_stat_scsi_lu_dev.attr,
+ &target_stat_scsi_lu_indx.attr,
+ &target_stat_scsi_lu_lun.attr,
+ &target_stat_scsi_lu_lu_name.attr,
+ &target_stat_scsi_lu_vend.attr,
+ &target_stat_scsi_lu_prod.attr,
+ &target_stat_scsi_lu_rev.attr,
+ &target_stat_scsi_lu_dev_type.attr,
+ &target_stat_scsi_lu_status.attr,
+ &target_stat_scsi_lu_state_bit.attr,
+ &target_stat_scsi_lu_num_cmds.attr,
+ &target_stat_scsi_lu_read_mbytes.attr,
+ &target_stat_scsi_lu_write_mbytes.attr,
+ &target_stat_scsi_lu_resets.attr,
+ &target_stat_scsi_lu_full_stat.attr,
+ &target_stat_scsi_lu_hs_num_cmds.attr,
+ &target_stat_scsi_lu_creation_time.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_lu_attrib_ops = {
+ .show_attribute = target_stat_scsi_lu_attr_show,
+ .store_attribute = target_stat_scsi_lu_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_lu_cit = {
+ .ct_item_ops = &target_stat_scsi_lu_attrib_ops,
+ .ct_attrs = target_stat_scsi_lu_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Called from target_core_configfs.c:target_core_make_subdev() to setup
+ * the target statistics groups + configfs CITs located in target_core_stat.c
+ */
+void target_stat_setup_dev_default_groups(struct se_subsystem_dev *se_subdev)
+{
+ struct config_group *dev_stat_grp = &se_subdev->dev_stat_grps.stat_group;
+
+ config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_dev_group,
+ "scsi_dev", &target_stat_scsi_dev_cit);
+ config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_tgt_dev_group,
+ "scsi_tgt_dev", &target_stat_scsi_tgt_dev_cit);
+ config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_lu_group,
+ "scsi_lu", &target_stat_scsi_lu_cit);
+
+ dev_stat_grp->default_groups[0] = &se_subdev->dev_stat_grps.scsi_dev_group;
+ dev_stat_grp->default_groups[1] = &se_subdev->dev_stat_grps.scsi_tgt_dev_group;
+ dev_stat_grp->default_groups[2] = &se_subdev->dev_stat_grps.scsi_lu_group;
+ dev_stat_grp->default_groups[3] = NULL;
+}
+
+/*
+ * SCSI Port Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_port, se_port_stat_grps);
+#define DEV_STAT_SCSI_PORT_ATTR(_name, _mode) \
+static struct target_stat_scsi_port_attribute \
+ target_stat_scsi_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_port_show_attr_##_name, \
+ target_stat_scsi_port_store_attr_##_name);
+
+#define DEV_STAT_SCSI_PORT_ATTR_RO(_name) \
+static struct target_stat_scsi_port_attribute \
+ target_stat_scsi_port_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_port_show_attr_##_name);
+
+static ssize_t target_stat_scsi_port_show_attr_inst(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_hba *hba;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ hba = dev->se_hba;
+ ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_PORT_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_port_show_attr_dev(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_device *dev = lun->lun_se_dev;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ ret = snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_PORT_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_port_show_attr_indx(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ ret = snprintf(page, PAGE_SIZE, "%u\n", sep->sep_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_PORT_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_port_show_attr_role(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_port *sep;
+ ssize_t ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ ret = snprintf(page, PAGE_SIZE, "%s%u\n", "Device", dev->dev_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_PORT_ATTR_RO(role);
+
+static ssize_t target_stat_scsi_port_show_attr_busy_count(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ /* FIXME: scsiPortBusyStatuses */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_PORT_ATTR_RO(busy_count);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_port, se_port_stat_grps, scsi_port_group);
+
+static struct configfs_attribute *target_stat_scsi_port_attrs[] = {
+ &target_stat_scsi_port_inst.attr,
+ &target_stat_scsi_port_dev.attr,
+ &target_stat_scsi_port_indx.attr,
+ &target_stat_scsi_port_role.attr,
+ &target_stat_scsi_port_busy_count.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_port_attrib_ops = {
+ .show_attribute = target_stat_scsi_port_attr_show,
+ .store_attribute = target_stat_scsi_port_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_port_cit = {
+ .ct_item_ops = &target_stat_scsi_port_attrib_ops,
+ .ct_attrs = target_stat_scsi_port_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Target Port Table
+ */
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_tgt_port, se_port_stat_grps);
+#define DEV_STAT_SCSI_TGT_PORT_ATTR(_name, _mode) \
+static struct target_stat_scsi_tgt_port_attribute \
+ target_stat_scsi_tgt_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_tgt_port_show_attr_##_name, \
+ target_stat_scsi_tgt_port_store_attr_##_name);
+
+#define DEV_STAT_SCSI_TGT_PORT_ATTR_RO(_name) \
+static struct target_stat_scsi_tgt_port_attribute \
+ target_stat_scsi_tgt_port_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_tgt_port_show_attr_##_name);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_inst(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_port *sep;
+ struct se_hba *hba;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ hba = dev->se_hba;
+ ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_dev(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ ret = snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_indx(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ ret = snprintf(page, PAGE_SIZE, "%u\n", sep->sep_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_name(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ tpg = sep->sep_tpg;
+
+ ret = snprintf(page, PAGE_SIZE, "%sPort#%u\n",
+ tpg->se_tpg_tfo->get_fabric_name(), sep->sep_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(name);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_port_index(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ tpg = sep->sep_tpg;
+
+ ret = snprintf(page, PAGE_SIZE, "%s%s%d\n",
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg), "+t+",
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(port_index);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_in_cmds(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+
+ ret = snprintf(page, PAGE_SIZE, "%llu\n", sep->sep_stats.cmd_pdus);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(in_cmds);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_write_mbytes(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ (u32)(sep->sep_stats.rx_data_octets >> 20));
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(write_mbytes);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_read_mbytes(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ (u32)(sep->sep_stats.tx_data_octets >> 20));
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(read_mbytes);
+
+static ssize_t target_stat_scsi_tgt_port_show_attr_hs_in_cmds(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+
+ /* FIXME: scsiTgtPortHsInCommands */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TGT_PORT_ATTR_RO(hs_in_cmds);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_tgt_port, se_port_stat_grps,
+ scsi_tgt_port_group);
+
+static struct configfs_attribute *target_stat_scsi_tgt_port_attrs[] = {
+ &target_stat_scsi_tgt_port_inst.attr,
+ &target_stat_scsi_tgt_port_dev.attr,
+ &target_stat_scsi_tgt_port_indx.attr,
+ &target_stat_scsi_tgt_port_name.attr,
+ &target_stat_scsi_tgt_port_port_index.attr,
+ &target_stat_scsi_tgt_port_in_cmds.attr,
+ &target_stat_scsi_tgt_port_write_mbytes.attr,
+ &target_stat_scsi_tgt_port_read_mbytes.attr,
+ &target_stat_scsi_tgt_port_hs_in_cmds.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_tgt_port_attrib_ops = {
+ .show_attribute = target_stat_scsi_tgt_port_attr_show,
+ .store_attribute = target_stat_scsi_tgt_port_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_tgt_port_cit = {
+ .ct_item_ops = &target_stat_scsi_tgt_port_attrib_ops,
+ .ct_attrs = target_stat_scsi_tgt_port_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Transport Table
+o */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_transport, se_port_stat_grps);
+#define DEV_STAT_SCSI_TRANSPORT_ATTR(_name, _mode) \
+static struct target_stat_scsi_transport_attribute \
+ target_stat_scsi_transport_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_transport_show_attr_##_name, \
+ target_stat_scsi_transport_store_attr_##_name);
+
+#define DEV_STAT_SCSI_TRANSPORT_ATTR_RO(_name) \
+static struct target_stat_scsi_transport_attribute \
+ target_stat_scsi_transport_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_transport_show_attr_##_name);
+
+static ssize_t target_stat_scsi_transport_show_attr_inst(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_port *sep;
+ struct se_hba *hba;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+
+ hba = dev->se_hba;
+ ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TRANSPORT_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_transport_show_attr_device(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ tpg = sep->sep_tpg;
+ /* scsiTransportType */
+ ret = snprintf(page, PAGE_SIZE, "scsiTransport%s\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TRANSPORT_ATTR_RO(device);
+
+static ssize_t target_stat_scsi_transport_show_attr_indx(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_port *sep;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ tpg = sep->sep_tpg;
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ tpg->se_tpg_tfo->tpg_get_inst_index(tpg));
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TRANSPORT_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_transport_show_attr_dev_name(
+ struct se_port_stat_grps *pgrps, char *page)
+{
+ struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
+ struct se_device *dev = lun->lun_se_dev;
+ struct se_port *sep;
+ struct se_portal_group *tpg;
+ struct t10_wwn *wwn;
+ ssize_t ret;
+
+ spin_lock(&lun->lun_sep_lock);
+ sep = lun->lun_sep;
+ if (!sep) {
+ spin_unlock(&lun->lun_sep_lock);
+ return -ENODEV;
+ }
+ tpg = sep->sep_tpg;
+ wwn = &dev->se_sub_dev->t10_wwn;
+ /* scsiTransportDevName */
+ ret = snprintf(page, PAGE_SIZE, "%s+%s\n",
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ (strlen(wwn->unit_serial)) ? wwn->unit_serial :
+ wwn->vendor);
+ spin_unlock(&lun->lun_sep_lock);
+ return ret;
+}
+DEV_STAT_SCSI_TRANSPORT_ATTR_RO(dev_name);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_transport, se_port_stat_grps,
+ scsi_transport_group);
+
+static struct configfs_attribute *target_stat_scsi_transport_attrs[] = {
+ &target_stat_scsi_transport_inst.attr,
+ &target_stat_scsi_transport_device.attr,
+ &target_stat_scsi_transport_indx.attr,
+ &target_stat_scsi_transport_dev_name.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_transport_attrib_ops = {
+ .show_attribute = target_stat_scsi_transport_attr_show,
+ .store_attribute = target_stat_scsi_transport_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_transport_cit = {
+ .ct_item_ops = &target_stat_scsi_transport_attrib_ops,
+ .ct_attrs = target_stat_scsi_transport_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Called from target_core_fabric_configfs.c:target_fabric_make_lun() to setup
+ * the target port statistics groups + configfs CITs located in target_core_stat.c
+ */
+void target_stat_setup_port_default_groups(struct se_lun *lun)
+{
+ struct config_group *port_stat_grp = &lun->port_stat_grps.stat_group;
+
+ config_group_init_type_name(&lun->port_stat_grps.scsi_port_group,
+ "scsi_port", &target_stat_scsi_port_cit);
+ config_group_init_type_name(&lun->port_stat_grps.scsi_tgt_port_group,
+ "scsi_tgt_port", &target_stat_scsi_tgt_port_cit);
+ config_group_init_type_name(&lun->port_stat_grps.scsi_transport_group,
+ "scsi_transport", &target_stat_scsi_transport_cit);
+
+ port_stat_grp->default_groups[0] = &lun->port_stat_grps.scsi_port_group;
+ port_stat_grp->default_groups[1] = &lun->port_stat_grps.scsi_tgt_port_group;
+ port_stat_grp->default_groups[2] = &lun->port_stat_grps.scsi_transport_group;
+ port_stat_grp->default_groups[3] = NULL;
+}
+
+/*
+ * SCSI Authorized Initiator Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_auth_intr, se_ml_stat_grps);
+#define DEV_STAT_SCSI_AUTH_INTR_ATTR(_name, _mode) \
+static struct target_stat_scsi_auth_intr_attribute \
+ target_stat_scsi_auth_intr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_auth_intr_show_attr_##_name, \
+ target_stat_scsi_auth_intr_store_attr_##_name);
+
+#define DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(_name) \
+static struct target_stat_scsi_auth_intr_attribute \
+ target_stat_scsi_auth_intr_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_auth_intr_show_attr_##_name);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_inst(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ tpg = nacl->se_tpg;
+ /* scsiInstIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ tpg->se_tpg_tfo->tpg_get_inst_index(tpg));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_dev(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ lun = deve->se_lun;
+ /* scsiDeviceIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_se_dev->dev_index);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_port(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ tpg = nacl->se_tpg;
+ /* scsiAuthIntrTgtPortIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(port);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_indx(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", nacl->acl_index);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_dev_or_port(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrDevOrPort */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", 1);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(dev_or_port);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_intr_name(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrName */
+ ret = snprintf(page, PAGE_SIZE, "%s\n", nacl->initiatorname);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(intr_name);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_map_indx(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* FIXME: scsiAuthIntrLunMapIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(map_indx);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_att_count(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrAttachedTimes */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", deve->attach_count);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(att_count);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_num_cmds(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrOutCommands */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", deve->total_cmds);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(num_cmds);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_read_mbytes(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrReadMegaBytes */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", (u32)(deve->read_bytes >> 20));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(read_mbytes);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_write_mbytes(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrWrittenMegaBytes */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", (u32)(deve->write_bytes >> 20));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(write_mbytes);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_hs_num_cmds(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* FIXME: scsiAuthIntrHSOutCommands */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(hs_num_cmds);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_creation_time(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAuthIntrLastCreation */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", (u32)(((u32)deve->creation_time -
+ INITIAL_JIFFIES) * 100 / HZ));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(creation_time);
+
+static ssize_t target_stat_scsi_auth_intr_show_attr_row_status(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* FIXME: scsiAuthIntrRowStatus */
+ ret = snprintf(page, PAGE_SIZE, "Ready\n");
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_AUTH_INTR_ATTR_RO(row_status);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_auth_intr, se_ml_stat_grps,
+ scsi_auth_intr_group);
+
+static struct configfs_attribute *target_stat_scsi_auth_intr_attrs[] = {
+ &target_stat_scsi_auth_intr_inst.attr,
+ &target_stat_scsi_auth_intr_dev.attr,
+ &target_stat_scsi_auth_intr_port.attr,
+ &target_stat_scsi_auth_intr_indx.attr,
+ &target_stat_scsi_auth_intr_dev_or_port.attr,
+ &target_stat_scsi_auth_intr_intr_name.attr,
+ &target_stat_scsi_auth_intr_map_indx.attr,
+ &target_stat_scsi_auth_intr_att_count.attr,
+ &target_stat_scsi_auth_intr_num_cmds.attr,
+ &target_stat_scsi_auth_intr_read_mbytes.attr,
+ &target_stat_scsi_auth_intr_write_mbytes.attr,
+ &target_stat_scsi_auth_intr_hs_num_cmds.attr,
+ &target_stat_scsi_auth_intr_creation_time.attr,
+ &target_stat_scsi_auth_intr_row_status.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_auth_intr_attrib_ops = {
+ .show_attribute = target_stat_scsi_auth_intr_attr_show,
+ .store_attribute = target_stat_scsi_auth_intr_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_auth_intr_cit = {
+ .ct_item_ops = &target_stat_scsi_auth_intr_attrib_ops,
+ .ct_attrs = target_stat_scsi_auth_intr_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Attached Initiator Port Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_att_intr_port, se_ml_stat_grps);
+#define DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR(_name, _mode) \
+static struct target_stat_scsi_att_intr_port_attribute \
+ target_stat_scsi_att_intr_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_att_intr_port_show_attr_##_name, \
+ target_stat_scsi_att_intr_port_store_attr_##_name);
+
+#define DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(_name) \
+static struct target_stat_scsi_att_intr_port_attribute \
+ target_stat_scsi_att_intr_port_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_att_intr_port_show_attr_##_name);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_inst(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ tpg = nacl->se_tpg;
+ /* scsiInstIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ tpg->se_tpg_tfo->tpg_get_inst_index(tpg));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_dev(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ lun = deve->se_lun;
+ /* scsiDeviceIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_se_dev->dev_index);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_port(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ tpg = nacl->se_tpg;
+ /* scsiPortIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(port);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_indx(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_session *se_sess;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->nacl_sess_lock);
+ se_sess = nacl->nacl_sess;
+ if (!se_sess) {
+ spin_unlock_irq(&nacl->nacl_sess_lock);
+ return -ENODEV;
+ }
+
+ tpg = nacl->se_tpg;
+ /* scsiAttIntrPortIndex */
+ ret = snprintf(page, PAGE_SIZE, "%u\n",
+ tpg->se_tpg_tfo->sess_get_index(se_sess));
+ spin_unlock_irq(&nacl->nacl_sess_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_port_auth_indx(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t ret;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[lacl->mapped_lun];
+ if (!deve->se_lun || !deve->se_lun_acl) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -ENODEV;
+ }
+ /* scsiAttIntrPortAuthIntrIdx */
+ ret = snprintf(page, PAGE_SIZE, "%u\n", nacl->acl_index);
+ spin_unlock_irq(&nacl->device_list_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(port_auth_indx);
+
+static ssize_t target_stat_scsi_att_intr_port_show_attr_port_ident(
+ struct se_ml_stat_grps *lgrps, char *page)
+{
+ struct se_lun_acl *lacl = container_of(lgrps,
+ struct se_lun_acl, ml_stat_grps);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_session *se_sess;
+ struct se_portal_group *tpg;
+ ssize_t ret;
+ unsigned char buf[64];
+
+ spin_lock_irq(&nacl->nacl_sess_lock);
+ se_sess = nacl->nacl_sess;
+ if (!se_sess) {
+ spin_unlock_irq(&nacl->nacl_sess_lock);
+ return -ENODEV;
+ }
+
+ tpg = nacl->se_tpg;
+ /* scsiAttIntrPortName+scsiAttIntrPortIdentifier */
+ memset(buf, 0, 64);
+ if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL)
+ tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, buf, 64);
+
+ ret = snprintf(page, PAGE_SIZE, "%s+i+%s\n", nacl->initiatorname, buf);
+ spin_unlock_irq(&nacl->nacl_sess_lock);
+ return ret;
+}
+DEV_STAT_SCSI_ATTR_INTR_PORT_ATTR_RO(port_ident);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_att_intr_port, se_ml_stat_grps,
+ scsi_att_intr_port_group);
+
+static struct configfs_attribute *target_stat_scsi_ath_intr_port_attrs[] = {
+ &target_stat_scsi_att_intr_port_inst.attr,
+ &target_stat_scsi_att_intr_port_dev.attr,
+ &target_stat_scsi_att_intr_port_port.attr,
+ &target_stat_scsi_att_intr_port_indx.attr,
+ &target_stat_scsi_att_intr_port_port_auth_indx.attr,
+ &target_stat_scsi_att_intr_port_port_ident.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_att_intr_port_attrib_ops = {
+ .show_attribute = target_stat_scsi_att_intr_port_attr_show,
+ .store_attribute = target_stat_scsi_att_intr_port_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_att_intr_port_cit = {
+ .ct_item_ops = &target_stat_scsi_att_intr_port_attrib_ops,
+ .ct_attrs = target_stat_scsi_ath_intr_port_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Called from target_core_fabric_configfs.c:target_fabric_make_mappedlun() to setup
+ * the target MappedLUN statistics groups + configfs CITs located in target_core_stat.c
+ */
+void target_stat_setup_mappedlun_default_groups(struct se_lun_acl *lacl)
+{
+ struct config_group *ml_stat_grp = &lacl->ml_stat_grps.stat_group;
+
+ config_group_init_type_name(&lacl->ml_stat_grps.scsi_auth_intr_group,
+ "scsi_auth_intr", &target_stat_scsi_auth_intr_cit);
+ config_group_init_type_name(&lacl->ml_stat_grps.scsi_att_intr_port_group,
+ "scsi_att_intr_port", &target_stat_scsi_att_intr_port_cit);
+
+ ml_stat_grp->default_groups[0] = &lacl->ml_stat_grps.scsi_auth_intr_group;
+ ml_stat_grp->default_groups[1] = &lacl->ml_stat_grps.scsi_att_intr_port_group;
+ ml_stat_grp->default_groups[2] = NULL;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_tmr.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_tmr.c
new file mode 100644
index 0000000..4a5c6d7
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_tmr.c
@@ -0,0 +1,495 @@
+/*******************************************************************************
+ * Filename: target_core_tmr.c
+ *
+ * This file contains SPC-3 task management infrastructure
+ *
+ * Copyright (c) 2009,2010 Rising Tide Systems
+ * Copyright (c) 2009,2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/export.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+
+int core_tmr_alloc_req(
+ struct se_cmd *se_cmd,
+ void *fabric_tmr_ptr,
+ u8 function,
+ gfp_t gfp_flags)
+{
+ struct se_tmr_req *tmr;
+
+ tmr = kzalloc(sizeof(struct se_tmr_req), gfp_flags);
+ if (!tmr) {
+ pr_err("Unable to allocate struct se_tmr_req\n");
+ return -ENOMEM;
+ }
+
+ se_cmd->se_cmd_flags |= SCF_SCSI_TMR_CDB;
+ se_cmd->se_tmr_req = tmr;
+ tmr->task_cmd = se_cmd;
+ tmr->fabric_tmr_ptr = fabric_tmr_ptr;
+ tmr->function = function;
+ INIT_LIST_HEAD(&tmr->tmr_list);
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tmr_alloc_req);
+
+void core_tmr_release_req(
+ struct se_tmr_req *tmr)
+{
+ struct se_device *dev = tmr->tmr_dev;
+ unsigned long flags;
+
+ if (!dev) {
+ kfree(tmr);
+ return;
+ }
+
+ spin_lock_irqsave(&dev->se_tmr_lock, flags);
+ list_del(&tmr->tmr_list);
+ spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
+
+ kfree(tmr);
+}
+
+static void core_tmr_handle_tas_abort(
+ struct se_node_acl *tmr_nacl,
+ struct se_cmd *cmd,
+ int tas,
+ int fe_count)
+{
+ if (!fe_count) {
+ transport_cmd_finish_abort(cmd, 1);
+ return;
+ }
+ /*
+ * TASK ABORTED status (TAS) bit support
+ */
+ if ((tmr_nacl &&
+ (tmr_nacl == cmd->se_sess->se_node_acl)) || tas)
+ transport_send_task_abort(cmd);
+
+ transport_cmd_finish_abort(cmd, 0);
+}
+
+static int target_check_cdb_and_preempt(struct list_head *list,
+ struct se_cmd *cmd)
+{
+ struct t10_pr_registration *reg;
+
+ if (!list)
+ return 0;
+ list_for_each_entry(reg, list, pr_reg_abort_list) {
+ if (reg->pr_res_key == cmd->pr_res_key)
+ return 0;
+ }
+
+ return 1;
+}
+
+void core_tmr_abort_task(
+ struct se_device *dev,
+ struct se_tmr_req *tmr,
+ struct se_session *se_sess)
+{
+ struct se_cmd *se_cmd, *tmp_cmd;
+ unsigned long flags;
+ int ref_tag;
+
+ spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
+ list_for_each_entry_safe(se_cmd, tmp_cmd,
+ &se_sess->sess_cmd_list, se_cmd_list) {
+
+ if (dev != se_cmd->se_dev)
+ continue;
+ ref_tag = se_cmd->se_tfo->get_task_tag(se_cmd);
+ if (tmr->ref_task_tag != ref_tag)
+ continue;
+
+ printk("ABORT_TASK: Found referenced %s task_tag: %u\n",
+ se_cmd->se_tfo->get_fabric_name(), ref_tag);
+
+ spin_lock(&se_cmd->t_state_lock);
+ if (se_cmd->transport_state & CMD_T_COMPLETE) {
+ printk("ABORT_TASK: ref_tag: %u already complete, skipping\n", ref_tag);
+ spin_unlock(&se_cmd->t_state_lock);
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+ goto out;
+ }
+ se_cmd->transport_state |= CMD_T_ABORTED;
+ spin_unlock(&se_cmd->t_state_lock);
+
+ list_del_init(&se_cmd->se_cmd_list);
+ kref_get(&se_cmd->cmd_kref);
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+
+ cancel_work_sync(&se_cmd->work);
+ transport_wait_for_tasks(se_cmd);
+ /*
+ * Now send SAM_STAT_TASK_ABORTED status for the referenced
+ * se_cmd descriptor..
+ */
+ transport_send_task_abort(se_cmd);
+ /*
+ * Also deal with possible extra acknowledge reference..
+ */
+ if (se_cmd->se_cmd_flags & SCF_ACK_KREF)
+ target_put_sess_cmd(se_sess, se_cmd);
+
+ target_put_sess_cmd(se_sess, se_cmd);
+
+ printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for"
+ " ref_tag: %d\n", ref_tag);
+ tmr->response = TMR_FUNCTION_COMPLETE;
+ return;
+ }
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+
+out:
+ printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %d\n",
+ tmr->ref_task_tag);
+ tmr->response = TMR_TASK_DOES_NOT_EXIST;
+}
+
+static void core_tmr_drain_tmr_list(
+ struct se_device *dev,
+ struct se_tmr_req *tmr,
+ struct list_head *preempt_and_abort_list)
+{
+ LIST_HEAD(drain_tmr_list);
+ struct se_tmr_req *tmr_p, *tmr_pp;
+ struct se_cmd *cmd;
+ unsigned long flags;
+ /*
+ * Release all pending and outgoing TMRs aside from the received
+ * LUN_RESET tmr..
+ */
+ spin_lock_irqsave(&dev->se_tmr_lock, flags);
+ list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) {
+ /*
+ * Allow the received TMR to return with FUNCTION_COMPLETE.
+ */
+ if (tmr_p == tmr)
+ continue;
+
+ cmd = tmr_p->task_cmd;
+ if (!cmd) {
+ pr_err("Unable to locate struct se_cmd for TMR\n");
+ continue;
+ }
+ /*
+ * If this function was called with a valid pr_res_key
+ * parameter (eg: for PROUT PREEMPT_AND_ABORT service action
+ * skip non regisration key matching TMRs.
+ */
+ if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd))
+ continue;
+
+ spin_lock(&cmd->t_state_lock);
+ if (!(cmd->transport_state & CMD_T_ACTIVE)) {
+ spin_unlock(&cmd->t_state_lock);
+ continue;
+ }
+ if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
+ spin_unlock(&cmd->t_state_lock);
+ continue;
+ }
+ spin_unlock(&cmd->t_state_lock);
+
+ list_move_tail(&tmr_p->tmr_list, &drain_tmr_list);
+ }
+ spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
+
+ list_for_each_entry_safe(tmr_p, tmr_pp, &drain_tmr_list, tmr_list) {
+ list_del_init(&tmr_p->tmr_list);
+ cmd = tmr_p->task_cmd;
+
+ pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
+ " Response: 0x%02x, t_state: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "", tmr_p,
+ tmr_p->function, tmr_p->response, cmd->t_state);
+
+ transport_cmd_finish_abort(cmd, 1);
+ }
+}
+
+static void core_tmr_drain_task_list(
+ struct se_device *dev,
+ struct se_cmd *prout_cmd,
+ struct se_node_acl *tmr_nacl,
+ int tas,
+ struct list_head *preempt_and_abort_list)
+{
+ LIST_HEAD(drain_task_list);
+ struct se_cmd *cmd;
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+ int fe_count;
+ /*
+ * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status.
+ * This is following sam4r17, section 5.6 Aborting commands, Table 38
+ * for TMR LUN_RESET:
+ *
+ * a) "Yes" indicates that each command that is aborted on an I_T nexus
+ * other than the one that caused the SCSI device condition is
+ * completed with TASK ABORTED status, if the TAS bit is set to one in
+ * the Control mode page (see SPC-4). "No" indicates that no status is
+ * returned for aborted commands.
+ *
+ * d) If the logical unit reset is caused by a particular I_T nexus
+ * (e.g., by a LOGICAL UNIT RESET task management function), then "yes"
+ * (TASK_ABORTED status) applies.
+ *
+ * Otherwise (e.g., if triggered by a hard reset), "no"
+ * (no TASK_ABORTED SAM status) applies.
+ *
+ * Note that this seems to be independent of TAS (Task Aborted Status)
+ * in the Control Mode Page.
+ */
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ list_for_each_entry_safe(task, task_tmp, &dev->state_task_list,
+ t_state_list) {
+ if (!task->task_se_cmd) {
+ pr_err("task->task_se_cmd is NULL!\n");
+ continue;
+ }
+ cmd = task->task_se_cmd;
+
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ list_move_tail(&task->t_state_list, &drain_task_list);
+ task->t_state_active = false;
+ /*
+ * Remove from task execute list before processing drain_task_list
+ */
+ if (!list_empty(&task->t_execute_list))
+ __transport_remove_task_from_execute_queue(task, dev);
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+ while (!list_empty(&drain_task_list)) {
+ task = list_entry(drain_task_list.next, struct se_task, t_state_list);
+ list_del(&task->t_state_list);
+ cmd = task->task_se_cmd;
+
+ pr_debug("LUN_RESET: %s cmd: %p task: %p"
+ " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d"
+ "cdb: 0x%02x\n",
+ (preempt_and_abort_list) ? "Preempt" : "", cmd, task,
+ cmd->se_tfo->get_task_tag(cmd), 0,
+ cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
+ cmd->t_task_cdb[0]);
+ pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
+ " t_task_cdbs: %d t_task_cdbs_left: %d"
+ " t_task_cdbs_sent: %d -- CMD_T_ACTIVE: %d"
+ " CMD_T_STOP: %d CMD_T_SENT: %d\n",
+ cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key,
+ cmd->t_task_list_num,
+ atomic_read(&cmd->t_task_cdbs_left),
+ atomic_read(&cmd->t_task_cdbs_sent),
+ (cmd->transport_state & CMD_T_ACTIVE) != 0,
+ (cmd->transport_state & CMD_T_STOP) != 0,
+ (cmd->transport_state & CMD_T_SENT) != 0);
+
+ /*
+ * If the command may be queued onto a workqueue cancel it now.
+ *
+ * This is equivalent to removal from the execute queue in the
+ * loop above, but we do it down here given that
+ * cancel_work_sync may block.
+ */
+ if (cmd->t_state == TRANSPORT_COMPLETE)
+ cancel_work_sync(&cmd->work);
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ target_stop_task(task, &flags);
+
+ if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ pr_debug("LUN_RESET: Skipping task: %p, dev: %p for"
+ " t_task_cdbs_ex_left: %d\n", task, dev,
+ atomic_read(&cmd->t_task_cdbs_ex_left));
+ continue;
+ }
+ fe_count = atomic_read(&cmd->t_fe_count);
+
+ if (!(cmd->transport_state & CMD_T_ACTIVE)) {
+ pr_debug("LUN_RESET: got CMD_T_ACTIVE for"
+ " task: %p, t_fe_count: %d dev: %p\n", task,
+ fe_count, dev);
+ cmd->transport_state |= CMD_T_ABORTED;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
+ continue;
+ }
+ pr_debug("LUN_RESET: Got !CMD_T_ACTIVE for task: %p,"
+ " t_fe_count: %d dev: %p\n", task, fe_count, dev);
+ cmd->transport_state |= CMD_T_ABORTED;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
+ }
+}
+
+static void core_tmr_drain_cmd_list(
+ struct se_device *dev,
+ struct se_cmd *prout_cmd,
+ struct se_node_acl *tmr_nacl,
+ int tas,
+ struct list_head *preempt_and_abort_list)
+{
+ LIST_HEAD(drain_cmd_list);
+ struct se_queue_obj *qobj = &dev->dev_queue_obj;
+ struct se_cmd *cmd, *tcmd;
+ unsigned long flags;
+ /*
+ * Release all commands remaining in the struct se_device cmd queue.
+ *
+ * This follows the same logic as above for the struct se_device
+ * struct se_task state list, where commands are returned with
+ * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD
+ * reference, otherwise the struct se_cmd is released.
+ */
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) {
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ cmd->transport_state &= ~CMD_T_QUEUED;
+ atomic_dec(&qobj->queue_cnt);
+ list_move_tail(&cmd->se_queue_node, &drain_cmd_list);
+ }
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ while (!list_empty(&drain_cmd_list)) {
+ cmd = list_entry(drain_cmd_list.next, struct se_cmd, se_queue_node);
+ list_del_init(&cmd->se_queue_node);
+
+ pr_debug("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
+ " %d t_fe_count: %d\n", (preempt_and_abort_list) ?
+ "Preempt" : "", cmd, cmd->t_state,
+ atomic_read(&cmd->t_fe_count));
+
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas,
+ atomic_read(&cmd->t_fe_count));
+ }
+}
+
+int core_tmr_lun_reset(
+ struct se_device *dev,
+ struct se_tmr_req *tmr,
+ struct list_head *preempt_and_abort_list,
+ struct se_cmd *prout_cmd)
+{
+ struct se_node_acl *tmr_nacl = NULL;
+ struct se_portal_group *tmr_tpg = NULL;
+ int tas;
+ /*
+ * TASK_ABORTED status bit, this is configurable via ConfigFS
+ * struct se_device attributes. spc4r17 section 7.4.6 Control mode page
+ *
+ * A task aborted status (TAS) bit set to zero specifies that aborted
+ * tasks shall be terminated by the device server without any response
+ * to the application client. A TAS bit set to one specifies that tasks
+ * aborted by the actions of an I_T nexus other than the I_T nexus on
+ * which the command was received shall be completed with TASK ABORTED
+ * status (see SAM-4).
+ */
+ tas = dev->se_sub_dev->se_dev_attrib.emulate_tas;
+ /*
+ * Determine if this se_tmr is coming from a $FABRIC_MOD
+ * or struct se_device passthrough..
+ */
+ if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) {
+ tmr_nacl = tmr->task_cmd->se_sess->se_node_acl;
+ tmr_tpg = tmr->task_cmd->se_sess->se_tpg;
+ if (tmr_nacl && tmr_tpg) {
+ pr_debug("LUN_RESET: TMR caller fabric: %s"
+ " initiator port %s\n",
+ tmr_tpg->se_tpg_tfo->get_fabric_name(),
+ tmr_nacl->initiatorname);
+ }
+ }
+ pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ dev->transport->name, tas);
+
+ core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list);
+ core_tmr_drain_task_list(dev, prout_cmd, tmr_nacl, tas,
+ preempt_and_abort_list);
+ core_tmr_drain_cmd_list(dev, prout_cmd, tmr_nacl, tas,
+ preempt_and_abort_list);
+ /*
+ * Clear any legacy SPC-2 reservation when called during
+ * LOGICAL UNIT RESET
+ */
+ if (!preempt_and_abort_list &&
+ (dev->dev_flags & DF_SPC2_RESERVATIONS)) {
+ spin_lock(&dev->dev_reservation_lock);
+ dev->dev_reserved_node_acl = NULL;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
+ spin_unlock(&dev->dev_reservation_lock);
+ pr_debug("LUN_RESET: SCSI-2 Released reservation\n");
+ }
+
+ spin_lock_irq(&dev->stats_lock);
+ dev->num_resets++;
+ spin_unlock_irq(&dev->stats_lock);
+
+ pr_debug("LUN_RESET: %s for [%s] Complete\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ dev->transport->name);
+ return 0;
+}
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_tpg.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_tpg.c
new file mode 100644
index 0000000..0e17fa3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_tpg.c
@@ -0,0 +1,865 @@
+/*******************************************************************************
+ * Filename: target_core_tpg.c
+ *
+ * This file contains generic Target Portal Group related functions.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/in.h>
+#include <linux/export.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+
+#include "target_core_internal.h"
+
+extern struct se_device *g_lun0_dev;
+
+static DEFINE_SPINLOCK(tpg_lock);
+static LIST_HEAD(tpg_list);
+
+/* core_clear_initiator_node_from_tpg():
+ *
+ *
+ */
+static void core_clear_initiator_node_from_tpg(
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg)
+{
+ int i;
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ if (!deve->se_lun) {
+ pr_err("%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ tpg->se_tpg_tfo->get_fabric_name());
+ continue;
+ }
+
+ lun = deve->se_lun;
+ spin_unlock_irq(&nacl->device_list_lock);
+ core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+}
+
+/* __core_tpg_get_initiator_node_acl():
+ *
+ * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
+ */
+struct se_node_acl *__core_tpg_get_initiator_node_acl(
+ struct se_portal_group *tpg,
+ const char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (!strcmp(acl->initiatorname, initiatorname))
+ return acl;
+ }
+
+ return NULL;
+}
+
+/* core_tpg_get_initiator_node_acl():
+ *
+ *
+ */
+struct se_node_acl *core_tpg_get_initiator_node_acl(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ return acl;
+}
+
+/* core_tpg_add_node_to_devs():
+ *
+ *
+ */
+void core_tpg_add_node_to_devs(
+ struct se_node_acl *acl,
+ struct se_portal_group *tpg)
+{
+ int i = 0;
+ u32 lun_access = 0;
+ struct se_lun *lun;
+ struct se_device *dev;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = tpg->tpg_lun_list[i];
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
+ continue;
+
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ dev = lun->lun_se_dev;
+ /*
+ * By default in LIO-Target $FABRIC_MOD,
+ * demo_mode_write_protect is ON, or READ_ONLY;
+ */
+ if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
+ if (dev->dev_flags & DF_READ_ONLY)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ /*
+ * Allow only optical drives to issue R/W in default RO
+ * demo mode.
+ */
+ if (dev->transport->get_device_type(dev) == TYPE_DISK)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+ }
+
+ pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
+ " access for LUN in Demo Mode\n",
+ tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
+ (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
+ "READ-WRITE" : "READ-ONLY");
+
+ core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
+ lun_access, acl, tpg, 1);
+ spin_lock(&tpg->tpg_lun_lock);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+}
+
+/* core_set_queue_depth_for_node():
+ *
+ *
+ */
+static int core_set_queue_depth_for_node(
+ struct se_portal_group *tpg,
+ struct se_node_acl *acl)
+{
+ if (!acl->queue_depth) {
+ pr_err("Queue depth for %s Initiator Node: %s is 0,"
+ "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
+ acl->initiatorname);
+ acl->queue_depth = 1;
+ }
+
+ return 0;
+}
+
+void array_free(void *array, int n)
+{
+ void **a = array;
+ int i;
+
+ for (i = 0; i < n; i++)
+ kfree(a[i]);
+ kfree(a);
+}
+
+static void *array_zalloc(int n, size_t size, gfp_t flags)
+{
+ void **a;
+ int i;
+
+ a = kzalloc(n * sizeof(void*), flags);
+ if (!a)
+ return NULL;
+ for (i = 0; i < n; i++) {
+ a[i] = kzalloc(size, flags);
+ if (!a[i]) {
+ array_free(a, n);
+ return NULL;
+ }
+ }
+ return a;
+}
+
+/* core_create_device_list_for_node():
+ *
+ *
+ */
+static int core_create_device_list_for_node(struct se_node_acl *nacl)
+{
+ struct se_dev_entry *deve;
+ int i;
+
+ nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
+ sizeof(struct se_dev_entry), GFP_KERNEL);
+ if (!nacl->device_list) {
+ pr_err("Unable to allocate memory for"
+ " struct se_node_acl->device_list\n");
+ return -ENOMEM;
+ }
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = nacl->device_list[i];
+
+ atomic_set(&deve->ua_count, 0);
+ atomic_set(&deve->pr_ref_count, 0);
+ spin_lock_init(&deve->ua_lock);
+ INIT_LIST_HEAD(&deve->alua_port_list);
+ INIT_LIST_HEAD(&deve->ua_list);
+ }
+
+ return 0;
+}
+
+/* core_tpg_check_initiator_node_acl()
+ *
+ *
+ */
+struct se_node_acl *core_tpg_check_initiator_node_acl(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if (acl)
+ return acl;
+
+ if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
+ return NULL;
+
+ acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
+ if (!acl)
+ return NULL;
+
+ INIT_LIST_HEAD(&acl->acl_list);
+ INIT_LIST_HEAD(&acl->acl_sess_list);
+ kref_init(&acl->acl_kref);
+ init_completion(&acl->acl_free_comp);
+ spin_lock_init(&acl->device_list_lock);
+ spin_lock_init(&acl->nacl_sess_lock);
+ atomic_set(&acl->acl_pr_ref_count, 0);
+ acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
+ snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+ acl->se_tpg = tpg;
+ acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
+ spin_lock_init(&acl->stats_lock);
+ acl->dynamic_node_acl = 1;
+
+ tpg->se_tpg_tfo->set_default_node_attributes(acl);
+
+ if (core_create_device_list_for_node(acl) < 0) {
+ tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
+ return NULL;
+ }
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ core_free_device_list_for_node(acl, tpg);
+ tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
+ return NULL;
+ }
+ /*
+ * Here we only create demo-mode MappedLUNs from the active
+ * TPG LUNs if the fabric is not explictly asking for
+ * tpg_check_demo_mode_login_only() == 1.
+ */
+ if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) &&
+ (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1))
+ do { ; } while (0);
+ else
+ core_tpg_add_node_to_devs(acl, tpg);
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ list_add_tail(&acl->acl_list, &tpg->acl_node_list);
+ tpg->num_node_acls++;
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
+ tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
+
+ return acl;
+}
+EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
+
+void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
+{
+ while (atomic_read(&nacl->acl_pr_ref_count) != 0)
+ cpu_relax();
+}
+
+void core_tpg_clear_object_luns(struct se_portal_group *tpg)
+{
+ int i;
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = tpg->tpg_lun_list[i];
+
+ if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
+ (lun->lun_se_dev == NULL))
+ continue;
+
+ spin_unlock(&tpg->tpg_lun_lock);
+ core_dev_del_lun(tpg, lun->unpacked_lun);
+ spin_lock(&tpg->tpg_lun_lock);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+}
+EXPORT_SYMBOL(core_tpg_clear_object_luns);
+
+/* core_tpg_add_initiator_node_acl():
+ *
+ *
+ */
+struct se_node_acl *core_tpg_add_initiator_node_acl(
+ struct se_portal_group *tpg,
+ struct se_node_acl *se_nacl,
+ const char *initiatorname,
+ u32 queue_depth)
+{
+ struct se_node_acl *acl = NULL;
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if (acl) {
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
+ " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
+ spin_unlock_irq(&tpg->acl_node_lock);
+ /*
+ * Release the locally allocated struct se_node_acl
+ * because * core_tpg_add_initiator_node_acl() returned
+ * a pointer to an existing demo mode node ACL.
+ */
+ if (se_nacl)
+ tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
+ se_nacl);
+ goto done;
+ }
+
+ pr_err("ACL entry for %s Initiator"
+ " Node %s already exists for TPG %u, ignoring"
+ " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
+ initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock_irq(&tpg->acl_node_lock);
+ return ERR_PTR(-EEXIST);
+ }
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ if (!se_nacl) {
+ pr_err("struct se_node_acl pointer is NULL\n");
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * For v4.x logic the se_node_acl_s is hanging off a fabric
+ * dependent structure allocated via
+ * struct target_core_fabric_ops->fabric_make_nodeacl()
+ */
+ acl = se_nacl;
+
+ INIT_LIST_HEAD(&acl->acl_list);
+ INIT_LIST_HEAD(&acl->acl_sess_list);
+ kref_init(&acl->acl_kref);
+ init_completion(&acl->acl_free_comp);
+ spin_lock_init(&acl->device_list_lock);
+ spin_lock_init(&acl->nacl_sess_lock);
+ atomic_set(&acl->acl_pr_ref_count, 0);
+ acl->queue_depth = queue_depth;
+ snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+ acl->se_tpg = tpg;
+ acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
+ spin_lock_init(&acl->stats_lock);
+
+ tpg->se_tpg_tfo->set_default_node_attributes(acl);
+
+ if (core_create_device_list_for_node(acl) < 0) {
+ tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ core_free_device_list_for_node(acl, tpg);
+ tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
+ return ERR_PTR(-EINVAL);
+ }
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ list_add_tail(&acl->acl_list, &tpg->acl_node_list);
+ tpg->num_node_acls++;
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+done:
+ pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
+ tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
+
+ return acl;
+}
+EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
+
+/* core_tpg_del_initiator_node_acl():
+ *
+ *
+ */
+int core_tpg_del_initiator_node_acl(
+ struct se_portal_group *tpg,
+ struct se_node_acl *acl,
+ int force)
+{
+ LIST_HEAD(sess_list);
+ struct se_session *sess, *sess_tmp;
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ }
+ list_del(&acl->acl_list);
+ tpg->num_node_acls--;
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ spin_lock_irqsave(&acl->nacl_sess_lock, flags);
+ acl->acl_stop = 1;
+
+ list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list,
+ sess_acl_list) {
+ if (sess->sess_tearing_down != 0)
+ continue;
+
+ target_get_session(sess);
+ list_move(&sess->sess_acl_list, &sess_list);
+ }
+ spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
+
+ list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) {
+ list_del(&sess->sess_acl_list);
+
+ rc = tpg->se_tpg_tfo->shutdown_session(sess);
+ target_put_session(sess);
+ if (!rc)
+ continue;
+ target_put_session(sess);
+ }
+ target_put_nacl(acl);
+ /*
+ * Wait for last target_put_nacl() to complete in target_complete_nacl()
+ * for active fabric session transport_deregister_session() callbacks.
+ */
+ wait_for_completion(&acl->acl_free_comp);
+
+ core_tpg_wait_for_nacl_pr_ref(acl);
+ core_clear_initiator_node_from_tpg(acl, tpg);
+ core_free_device_list_for_node(acl, tpg);
+
+ pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
+ tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
+
+/* core_tpg_set_initiator_node_queue_depth():
+ *
+ *
+ */
+int core_tpg_set_initiator_node_queue_depth(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname,
+ u32 queue_depth,
+ int force)
+{
+ struct se_session *sess, *init_sess = NULL;
+ struct se_node_acl *acl;
+ unsigned long flags;
+ int dynamic_acl = 0;
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if (!acl) {
+ pr_err("Access Control List entry for %s Initiator"
+ " Node %s does not exists for TPG %hu, ignoring"
+ " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
+ initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock_irq(&tpg->acl_node_lock);
+ return -ENODEV;
+ }
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ dynamic_acl = 1;
+ }
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ spin_lock_irqsave(&tpg->session_lock, flags);
+ list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
+ if (sess->se_node_acl != acl)
+ continue;
+
+ if (!force) {
+ pr_err("Unable to change queue depth for %s"
+ " Initiator Node: %s while session is"
+ " operational. To forcefully change the queue"
+ " depth and force session reinstatement"
+ " use the \"force=1\" parameter.\n",
+ tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
+ spin_unlock_irqrestore(&tpg->session_lock, flags);
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_irq(&tpg->acl_node_lock);
+ return -EEXIST;
+ }
+ /*
+ * Determine if the session needs to be closed by our context.
+ */
+ if (!tpg->se_tpg_tfo->shutdown_session(sess))
+ continue;
+
+ init_sess = sess;
+ break;
+ }
+
+ /*
+ * User has requested to change the queue depth for a Initiator Node.
+ * Change the value in the Node's struct se_node_acl, and call
+ * core_set_queue_depth_for_node() to add the requested queue depth.
+ *
+ * Finally call tpg->se_tpg_tfo->close_session() to force session
+ * reinstatement to occur if there is an active session for the
+ * $FABRIC_MOD Initiator Node in question.
+ */
+ acl->queue_depth = queue_depth;
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ spin_unlock_irqrestore(&tpg->session_lock, flags);
+ /*
+ * Force session reinstatement if
+ * core_set_queue_depth_for_node() failed, because we assume
+ * the $FABRIC_MOD has already the set session reinstatement
+ * bit from tpg->se_tpg_tfo->shutdown_session() called above.
+ */
+ if (init_sess)
+ tpg->se_tpg_tfo->close_session(init_sess);
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_irq(&tpg->acl_node_lock);
+ return -EINVAL;
+ }
+ spin_unlock_irqrestore(&tpg->session_lock, flags);
+ /*
+ * If the $FABRIC_MOD session for the Initiator Node ACL exists,
+ * forcefully shutdown the $FABRIC_MOD session/nexus.
+ */
+ if (init_sess)
+ tpg->se_tpg_tfo->close_session(init_sess);
+
+ pr_debug("Successfully changed queue depth to: %d for Initiator"
+ " Node: %s on %s Target Portal Group: %u\n", queue_depth,
+ initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+
+ spin_lock_irq(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_irq(&tpg->acl_node_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
+
+static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
+{
+ /* Set in core_dev_setup_virtual_lun0() */
+ struct se_device *dev = g_lun0_dev;
+ struct se_lun *lun = &se_tpg->tpg_virt_lun0;
+ u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ int ret;
+
+ lun->unpacked_lun = 0;
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ atomic_set(&lun->lun_acl_count, 0);
+ init_completion(&lun->lun_shutdown_comp);
+ INIT_LIST_HEAD(&lun->lun_acl_list);
+ INIT_LIST_HEAD(&lun->lun_cmd_list);
+ spin_lock_init(&lun->lun_acl_lock);
+ spin_lock_init(&lun->lun_cmd_lock);
+ spin_lock_init(&lun->lun_sep_lock);
+
+ ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
+{
+ struct se_lun *lun = &se_tpg->tpg_virt_lun0;
+
+ core_tpg_post_dellun(se_tpg, lun);
+}
+
+int core_tpg_register(
+ struct target_core_fabric_ops *tfo,
+ struct se_wwn *se_wwn,
+ struct se_portal_group *se_tpg,
+ void *tpg_fabric_ptr,
+ int se_tpg_type)
+{
+ struct se_lun *lun;
+ u32 i;
+
+ se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
+ sizeof(struct se_lun), GFP_KERNEL);
+ if (!se_tpg->tpg_lun_list) {
+ pr_err("Unable to allocate struct se_portal_group->"
+ "tpg_lun_list\n");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = se_tpg->tpg_lun_list[i];
+ lun->unpacked_lun = i;
+ lun->lun_link_magic = SE_LUN_LINK_MAGIC;
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ atomic_set(&lun->lun_acl_count, 0);
+ init_completion(&lun->lun_shutdown_comp);
+ INIT_LIST_HEAD(&lun->lun_acl_list);
+ INIT_LIST_HEAD(&lun->lun_cmd_list);
+ spin_lock_init(&lun->lun_acl_lock);
+ spin_lock_init(&lun->lun_cmd_lock);
+ spin_lock_init(&lun->lun_sep_lock);
+ }
+
+ se_tpg->se_tpg_type = se_tpg_type;
+ se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
+ se_tpg->se_tpg_tfo = tfo;
+ se_tpg->se_tpg_wwn = se_wwn;
+ atomic_set(&se_tpg->tpg_pr_ref_count, 0);
+ INIT_LIST_HEAD(&se_tpg->acl_node_list);
+ INIT_LIST_HEAD(&se_tpg->se_tpg_node);
+ INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
+ spin_lock_init(&se_tpg->acl_node_lock);
+ spin_lock_init(&se_tpg->session_lock);
+ spin_lock_init(&se_tpg->tpg_lun_lock);
+
+ if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
+ if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
+ kfree(se_tpg);
+ return -ENOMEM;
+ }
+ }
+
+ spin_lock_bh(&tpg_lock);
+ list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
+ spin_unlock_bh(&tpg_lock);
+
+ pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
+ " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
+ (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
+ "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
+ "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_register);
+
+int core_tpg_deregister(struct se_portal_group *se_tpg)
+{
+ struct se_node_acl *nacl, *nacl_tmp;
+
+ pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
+ " for endpoint: %s Portal Tag %u\n",
+ (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
+ "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
+ se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
+
+ spin_lock_bh(&tpg_lock);
+ list_del(&se_tpg->se_tpg_node);
+ spin_unlock_bh(&tpg_lock);
+
+ while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
+ cpu_relax();
+ /*
+ * Release any remaining demo-mode generated se_node_acl that have
+ * not been released because of TFO->tpg_check_demo_mode_cache() == 1
+ * in transport_deregister_session().
+ */
+ spin_lock_irq(&se_tpg->acl_node_lock);
+ list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
+ acl_list) {
+ list_del(&nacl->acl_list);
+ se_tpg->num_node_acls--;
+ spin_unlock_irq(&se_tpg->acl_node_lock);
+
+ core_tpg_wait_for_nacl_pr_ref(nacl);
+ core_free_device_list_for_node(nacl, se_tpg);
+ se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
+
+ spin_lock_irq(&se_tpg->acl_node_lock);
+ }
+ spin_unlock_irq(&se_tpg->acl_node_lock);
+
+ if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
+ core_tpg_release_virtual_lun0(se_tpg);
+
+ se_tpg->se_tpg_fabric_ptr = NULL;
+ array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG);
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_deregister);
+
+struct se_lun *core_tpg_pre_addlun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n",
+ tpg->se_tpg_tfo->get_fabric_name(),
+ unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ return ERR_PTR(-EOVERFLOW);
+ }
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun = tpg->tpg_lun_list[unpacked_lun];
+ if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
+ pr_err("TPG Logical Unit Number: %u is already active"
+ " on %s Target Portal Group: %u, ignoring request.\n",
+ unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return ERR_PTR(-EINVAL);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+int core_tpg_post_addlun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ u32 lun_access,
+ void *lun_ptr)
+{
+ int ret;
+
+ ret = core_dev_export(lun_ptr, tpg, lun);
+ if (ret < 0)
+ return ret;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun->lun_access = lun_access;
+ lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return 0;
+}
+
+static void core_tpg_shutdown_lun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ core_clear_lun_from_tpg(lun, tpg);
+ transport_clear_lun_from_sessions(lun);
+}
+
+struct se_lun *core_tpg_pre_dellun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ return ERR_PTR(-EOVERFLOW);
+ }
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun = tpg->tpg_lun_list[unpacked_lun];
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
+ pr_err("%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %u, ignoring request.\n",
+ tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return ERR_PTR(-ENODEV);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+int core_tpg_post_dellun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ core_tpg_shutdown_lun(tpg, lun);
+
+ core_dev_unexport(lun->lun_se_dev, tpg, lun);
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_transport.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_transport.c
new file mode 100644
index 0000000..b4b308e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_transport.c
@@ -0,0 +1,4889 @@
+/*******************************************************************************
+ * Filename: target_core_transport.c
+ *
+ * This file contains the Generic Target Engine Core.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/kthread.h>
+#include <linux/in.h>
+#include <linux/cdrom.h>
+#include <linux/module.h>
+#include <linux/ratelimit.h>
+#include <asm/unaligned.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+static int sub_api_initialized;
+
+static struct workqueue_struct *target_completion_wq;
+static struct kmem_cache *se_sess_cache;
+struct kmem_cache *se_ua_cache;
+struct kmem_cache *t10_pr_reg_cache;
+struct kmem_cache *t10_alua_lu_gp_cache;
+struct kmem_cache *t10_alua_lu_gp_mem_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
+
+static int transport_generic_write_pending(struct se_cmd *);
+static int transport_processing_thread(void *param);
+static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *);
+static void transport_complete_task_attr(struct se_cmd *cmd);
+static void transport_handle_queue_full(struct se_cmd *cmd,
+ struct se_device *dev);
+static void transport_free_dev_tasks(struct se_cmd *cmd);
+static int transport_generic_get_mem(struct se_cmd *cmd);
+static void transport_put_cmd(struct se_cmd *cmd);
+static void transport_remove_cmd_from_queue(struct se_cmd *cmd);
+static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq);
+static void target_complete_ok_work(struct work_struct *work);
+
+int init_se_kmem_caches(void)
+{
+ se_sess_cache = kmem_cache_create("se_sess_cache",
+ sizeof(struct se_session), __alignof__(struct se_session),
+ 0, NULL);
+ if (!se_sess_cache) {
+ pr_err("kmem_cache_create() for struct se_session"
+ " failed\n");
+ goto out;
+ }
+ se_ua_cache = kmem_cache_create("se_ua_cache",
+ sizeof(struct se_ua), __alignof__(struct se_ua),
+ 0, NULL);
+ if (!se_ua_cache) {
+ pr_err("kmem_cache_create() for struct se_ua failed\n");
+ goto out_free_sess_cache;
+ }
+ t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache",
+ sizeof(struct t10_pr_registration),
+ __alignof__(struct t10_pr_registration), 0, NULL);
+ if (!t10_pr_reg_cache) {
+ pr_err("kmem_cache_create() for struct t10_pr_registration"
+ " failed\n");
+ goto out_free_ua_cache;
+ }
+ t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache",
+ sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp),
+ 0, NULL);
+ if (!t10_alua_lu_gp_cache) {
+ pr_err("kmem_cache_create() for t10_alua_lu_gp_cache"
+ " failed\n");
+ goto out_free_pr_reg_cache;
+ }
+ t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache",
+ sizeof(struct t10_alua_lu_gp_member),
+ __alignof__(struct t10_alua_lu_gp_member), 0, NULL);
+ if (!t10_alua_lu_gp_mem_cache) {
+ pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_"
+ "cache failed\n");
+ goto out_free_lu_gp_cache;
+ }
+ t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache",
+ sizeof(struct t10_alua_tg_pt_gp),
+ __alignof__(struct t10_alua_tg_pt_gp), 0, NULL);
+ if (!t10_alua_tg_pt_gp_cache) {
+ pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
+ "cache failed\n");
+ goto out_free_lu_gp_mem_cache;
+ }
+ t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
+ "t10_alua_tg_pt_gp_mem_cache",
+ sizeof(struct t10_alua_tg_pt_gp_member),
+ __alignof__(struct t10_alua_tg_pt_gp_member),
+ 0, NULL);
+ if (!t10_alua_tg_pt_gp_mem_cache) {
+ pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
+ "mem_t failed\n");
+ goto out_free_tg_pt_gp_cache;
+ }
+
+ target_completion_wq = alloc_workqueue("target_completion",
+ WQ_MEM_RECLAIM, 0);
+ if (!target_completion_wq)
+ goto out_free_tg_pt_gp_mem_cache;
+
+ return 0;
+
+out_free_tg_pt_gp_mem_cache:
+ kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+out_free_tg_pt_gp_cache:
+ kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+out_free_lu_gp_mem_cache:
+ kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+out_free_lu_gp_cache:
+ kmem_cache_destroy(t10_alua_lu_gp_cache);
+out_free_pr_reg_cache:
+ kmem_cache_destroy(t10_pr_reg_cache);
+out_free_ua_cache:
+ kmem_cache_destroy(se_ua_cache);
+out_free_sess_cache:
+ kmem_cache_destroy(se_sess_cache);
+out:
+ return -ENOMEM;
+}
+
+void release_se_kmem_caches(void)
+{
+ destroy_workqueue(target_completion_wq);
+ kmem_cache_destroy(se_sess_cache);
+ kmem_cache_destroy(se_ua_cache);
+ kmem_cache_destroy(t10_pr_reg_cache);
+ kmem_cache_destroy(t10_alua_lu_gp_cache);
+ kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+ kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+ kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+}
+
+/* This code ensures unique mib indexes are handed out. */
+static DEFINE_SPINLOCK(scsi_mib_index_lock);
+static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
+
+/*
+ * Allocate a new row index for the entry type specified
+ */
+u32 scsi_get_new_index(scsi_index_t type)
+{
+ u32 new_index;
+
+ BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX));
+
+ spin_lock(&scsi_mib_index_lock);
+ new_index = ++scsi_mib_index[type];
+ spin_unlock(&scsi_mib_index_lock);
+
+ return new_index;
+}
+
+static void transport_init_queue_obj(struct se_queue_obj *qobj)
+{
+ atomic_set(&qobj->queue_cnt, 0);
+ INIT_LIST_HEAD(&qobj->qobj_list);
+ init_waitqueue_head(&qobj->thread_wq);
+ spin_lock_init(&qobj->cmd_queue_lock);
+}
+
+void transport_subsystem_check_init(void)
+{
+ int ret;
+
+ if (sub_api_initialized)
+ return;
+
+ ret = request_module("target_core_iblock");
+ if (ret != 0)
+ pr_err("Unable to load target_core_iblock\n");
+
+ ret = request_module("target_core_file");
+ if (ret != 0)
+ pr_err("Unable to load target_core_file\n");
+
+ ret = request_module("target_core_pscsi");
+ if (ret != 0)
+ pr_err("Unable to load target_core_pscsi\n");
+
+ ret = request_module("target_core_stgt");
+ if (ret != 0)
+ pr_err("Unable to load target_core_stgt\n");
+
+ sub_api_initialized = 1;
+ return;
+}
+
+struct se_session *transport_init_session(void)
+{
+ struct se_session *se_sess;
+
+ se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL);
+ if (!se_sess) {
+ pr_err("Unable to allocate struct se_session from"
+ " se_sess_cache\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&se_sess->sess_list);
+ INIT_LIST_HEAD(&se_sess->sess_acl_list);
+ INIT_LIST_HEAD(&se_sess->sess_cmd_list);
+ INIT_LIST_HEAD(&se_sess->sess_wait_list);
+ spin_lock_init(&se_sess->sess_cmd_lock);
+ kref_init(&se_sess->sess_kref);
+
+ return se_sess;
+}
+EXPORT_SYMBOL(transport_init_session);
+
+/*
+ * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called.
+ */
+void __transport_register_session(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct se_session *se_sess,
+ void *fabric_sess_ptr)
+{
+ unsigned char buf[PR_REG_ISID_LEN];
+
+ se_sess->se_tpg = se_tpg;
+ se_sess->fabric_sess_ptr = fabric_sess_ptr;
+ /*
+ * Used by struct se_node_acl's under ConfigFS to locate active se_session-t
+ *
+ * Only set for struct se_session's that will actually be moving I/O.
+ * eg: *NOT* discovery sessions.
+ */
+ if (se_nacl) {
+ /*
+ * If the fabric module supports an ISID based TransportID,
+ * save this value in binary from the fabric I_T Nexus now.
+ */
+ if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
+ memset(&buf[0], 0, PR_REG_ISID_LEN);
+ se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess,
+ &buf[0], PR_REG_ISID_LEN);
+ se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]);
+ }
+ kref_get(&se_nacl->acl_kref);
+
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The se_nacl->nacl_sess pointer will be set to the
+ * last active I_T Nexus for each struct se_node_acl.
+ */
+ se_nacl->nacl_sess = se_sess;
+
+ list_add_tail(&se_sess->sess_acl_list,
+ &se_nacl->acl_sess_list);
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ }
+ list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list);
+
+ pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
+ se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr);
+}
+EXPORT_SYMBOL(__transport_register_session);
+
+void transport_register_session(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct se_session *se_sess,
+ void *fabric_sess_ptr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&se_tpg->session_lock, flags);
+ __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr);
+ spin_unlock_irqrestore(&se_tpg->session_lock, flags);
+}
+EXPORT_SYMBOL(transport_register_session);
+
+static void target_release_session(struct kref *kref)
+{
+ struct se_session *se_sess = container_of(kref,
+ struct se_session, sess_kref);
+ struct se_portal_group *se_tpg = se_sess->se_tpg;
+
+ se_tpg->se_tpg_tfo->close_session(se_sess);
+}
+
+void target_get_session(struct se_session *se_sess)
+{
+ kref_get(&se_sess->sess_kref);
+}
+EXPORT_SYMBOL(target_get_session);
+
+int target_put_session(struct se_session *se_sess)
+{
+ return kref_put(&se_sess->sess_kref, target_release_session);
+}
+EXPORT_SYMBOL(target_put_session);
+
+static void target_complete_nacl(struct kref *kref)
+{
+ struct se_node_acl *nacl = container_of(kref,
+ struct se_node_acl, acl_kref);
+
+ complete(&nacl->acl_free_comp);
+}
+
+void target_put_nacl(struct se_node_acl *nacl)
+{
+ kref_put(&nacl->acl_kref, target_complete_nacl);
+}
+
+void transport_deregister_session_configfs(struct se_session *se_sess)
+{
+ struct se_node_acl *se_nacl;
+ unsigned long flags;
+ /*
+ * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
+ */
+ se_nacl = se_sess->se_node_acl;
+ if (se_nacl) {
+ spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags);
+ if (se_nacl->acl_stop == 0)
+ list_del(&se_sess->sess_acl_list);
+ /*
+ * If the session list is empty, then clear the pointer.
+ * Otherwise, set the struct se_session pointer from the tail
+ * element of the per struct se_node_acl active session list.
+ */
+ if (list_empty(&se_nacl->acl_sess_list))
+ se_nacl->nacl_sess = NULL;
+ else {
+ se_nacl->nacl_sess = container_of(
+ se_nacl->acl_sess_list.prev,
+ struct se_session, sess_acl_list);
+ }
+ spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags);
+ }
+}
+EXPORT_SYMBOL(transport_deregister_session_configfs);
+
+void transport_free_session(struct se_session *se_sess)
+{
+ kmem_cache_free(se_sess_cache, se_sess);
+}
+EXPORT_SYMBOL(transport_free_session);
+
+void transport_deregister_session(struct se_session *se_sess)
+{
+ struct se_portal_group *se_tpg = se_sess->se_tpg;
+ struct target_core_fabric_ops *se_tfo;
+ struct se_node_acl *se_nacl;
+ unsigned long flags;
+ bool comp_nacl = true;
+
+ if (!se_tpg) {
+ transport_free_session(se_sess);
+ return;
+ }
+ se_tfo = se_tpg->se_tpg_tfo;
+
+ spin_lock_irqsave(&se_tpg->session_lock, flags);
+ list_del(&se_sess->sess_list);
+ se_sess->se_tpg = NULL;
+ se_sess->fabric_sess_ptr = NULL;
+ spin_unlock_irqrestore(&se_tpg->session_lock, flags);
+
+ /*
+ * Determine if we need to do extra work for this initiator node's
+ * struct se_node_acl if it had been previously dynamically generated.
+ */
+ se_nacl = se_sess->se_node_acl;
+
+ spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
+ if (se_nacl && se_nacl->dynamic_node_acl) {
+ if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) {
+ list_del(&se_nacl->acl_list);
+ se_tpg->num_node_acls--;
+ spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
+ core_tpg_wait_for_nacl_pr_ref(se_nacl);
+ core_free_device_list_for_node(se_nacl, se_tpg);
+ se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl);
+
+ comp_nacl = false;
+ spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
+ }
+ }
+ spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
+
+ pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n",
+ se_tpg->se_tpg_tfo->get_fabric_name());
+ /*
+ * If last kref is dropping now for an explict NodeACL, awake sleeping
+ * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group
+ * removal context.
+ */
+ if (se_nacl && comp_nacl == true)
+ target_put_nacl(se_nacl);
+
+ transport_free_session(se_sess);
+}
+EXPORT_SYMBOL(transport_deregister_session);
+
+/*
+ * Called with cmd->t_state_lock held.
+ */
+static void transport_all_task_dev_remove_state(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_task *task;
+ unsigned long flags;
+
+ if (!dev)
+ return;
+
+ list_for_each_entry(task, &cmd->t_task_list, t_list) {
+ if (task->task_flags & TF_ACTIVE)
+ continue;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ if (task->t_state_active) {
+ pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n",
+ cmd->se_tfo->get_task_tag(cmd), dev, task);
+
+ list_del(&task->t_state_list);
+ atomic_dec(&cmd->t_task_cdbs_ex_left);
+ task->t_state_active = false;
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+ }
+
+}
+
+/* transport_cmd_check_stop():
+ *
+ * 'transport_off = 1' determines if CMD_T_ACTIVE should be cleared.
+ * 'transport_off = 2' determines if task_dev_state should be removed.
+ *
+ * A non-zero u8 t_state sets cmd->t_state.
+ * Returns 1 when command is stopped, else 0.
+ */
+static int transport_cmd_check_stop(
+ struct se_cmd *cmd,
+ int transport_off,
+ u8 t_state)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ /*
+ * Determine if IOCTL context caller in requesting the stopping of this
+ * command for LUN shutdown purposes.
+ */
+ if (cmd->transport_state & CMD_T_LUN_STOP) {
+ pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
+ __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
+
+ cmd->transport_state &= ~CMD_T_ACTIVE;
+ if (transport_off == 2)
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ complete(&cmd->transport_lun_stop_comp);
+ return 1;
+ }
+ /*
+ * Determine if frontend context caller is requesting the stopping of
+ * this command for frontend exceptions.
+ */
+ if (cmd->transport_state & CMD_T_STOP) {
+ pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
+ __func__, __LINE__,
+ cmd->se_tfo->get_task_tag(cmd));
+
+ if (transport_off == 2)
+ transport_all_task_dev_remove_state(cmd);
+
+ /*
+ * Clear struct se_cmd->se_lun before the transport_off == 2 handoff
+ * to FE.
+ */
+ if (transport_off == 2)
+ cmd->se_lun = NULL;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ complete(&cmd->t_transport_stop_comp);
+ return 1;
+ }
+ if (transport_off) {
+ cmd->transport_state &= ~CMD_T_ACTIVE;
+ if (transport_off == 2) {
+ transport_all_task_dev_remove_state(cmd);
+ /*
+ * Clear struct se_cmd->se_lun before the transport_off == 2
+ * handoff to fabric module.
+ */
+ cmd->se_lun = NULL;
+ /*
+ * Some fabric modules like tcm_loop can release
+ * their internally allocated I/O reference now and
+ * struct se_cmd now.
+ *
+ * Fabric modules are expected to return '1' here if the
+ * se_cmd being passed is released at this point,
+ * or zero if not being released.
+ */
+ if (cmd->se_tfo->check_stop_free != NULL) {
+ spin_unlock_irqrestore(
+ &cmd->t_state_lock, flags);
+
+ return cmd->se_tfo->check_stop_free(cmd);
+ }
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return 0;
+ } else if (t_state)
+ cmd->t_state = t_state;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return 0;
+}
+
+static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd)
+{
+ return transport_cmd_check_stop(cmd, 2, 0);
+}
+
+static void transport_lun_remove_cmd(struct se_cmd *cmd)
+{
+ struct se_lun *lun = cmd->se_lun;
+ unsigned long flags;
+
+ if (!lun)
+ return;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
+ cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
+ transport_all_task_dev_remove_state(cmd);
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+ if (!list_empty(&cmd->se_lun_node))
+ list_del_init(&cmd->se_lun_node);
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
+}
+
+void transport_cmd_finish_abort(struct se_cmd *cmd, int remove)
+{
+ if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
+ transport_lun_remove_cmd(cmd);
+
+ if (transport_cmd_check_stop_to_fabric(cmd))
+ return;
+ if (remove) {
+ transport_remove_cmd_from_queue(cmd);
+ transport_put_cmd(cmd);
+ }
+}
+
+static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state,
+ bool at_head)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_queue_obj *qobj = &dev->dev_queue_obj;
+ unsigned long flags;
+
+ if (t_state) {
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ cmd->t_state = t_state;
+ cmd->transport_state |= CMD_T_ACTIVE;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ }
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+
+ /* If the cmd is already on the list, remove it before we add it */
+ if (!list_empty(&cmd->se_queue_node))
+ list_del(&cmd->se_queue_node);
+ else
+ atomic_inc(&qobj->queue_cnt);
+
+ if (at_head)
+ list_add(&cmd->se_queue_node, &qobj->qobj_list);
+ else
+ list_add_tail(&cmd->se_queue_node, &qobj->qobj_list);
+ cmd->transport_state |= CMD_T_QUEUED;
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ wake_up_interruptible(&qobj->thread_wq);
+}
+
+static struct se_cmd *
+transport_get_cmd_from_queue(struct se_queue_obj *qobj)
+{
+ struct se_cmd *cmd;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ if (list_empty(&qobj->qobj_list)) {
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+ return NULL;
+ }
+ cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node);
+
+ cmd->transport_state &= ~CMD_T_QUEUED;
+ list_del_init(&cmd->se_queue_node);
+ atomic_dec(&qobj->queue_cnt);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ return cmd;
+}
+
+static void transport_remove_cmd_from_queue(struct se_cmd *cmd)
+{
+ struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ if (!(cmd->transport_state & CMD_T_QUEUED)) {
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+ return;
+ }
+ cmd->transport_state &= ~CMD_T_QUEUED;
+ atomic_dec(&qobj->queue_cnt);
+ list_del_init(&cmd->se_queue_node);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+}
+
+/*
+ * Completion function used by TCM subsystem plugins (such as FILEIO)
+ * for queueing up response from struct se_subsystem_api->do_task()
+ */
+void transport_complete_sync_cache(struct se_cmd *cmd, int good)
+{
+ struct se_task *task = list_entry(cmd->t_task_list.next,
+ struct se_task, t_list);
+
+ if (good) {
+ cmd->scsi_status = SAM_STAT_GOOD;
+ task->task_scsi_status = GOOD;
+ } else {
+ task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
+ task->task_se_cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+ }
+
+ transport_complete_task(task, good);
+}
+EXPORT_SYMBOL(transport_complete_sync_cache);
+
+static void target_complete_failure_work(struct work_struct *work)
+{
+ struct se_cmd *cmd = container_of(work, struct se_cmd, work);
+
+ transport_generic_request_failure(cmd);
+}
+
+/* transport_complete_task():
+ *
+ * Called from interrupt and non interrupt context depending
+ * on the transport plugin.
+ */
+void transport_complete_task(struct se_task *task, int success)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ task->task_flags &= ~TF_ACTIVE;
+
+ /*
+ * See if any sense data exists, if so set the TASK_SENSE flag.
+ * Also check for any other post completion work that needs to be
+ * done by the plugins.
+ */
+ if (dev && dev->transport->transport_complete) {
+ if (dev->transport->transport_complete(task) != 0) {
+ cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
+ task->task_flags |= TF_HAS_SENSE;
+ success = 1;
+ }
+ }
+
+ /*
+ * See if we are waiting for outstanding struct se_task
+ * to complete for an exception condition
+ */
+ if (task->task_flags & TF_REQUEST_STOP) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ complete(&task->task_stop_comp);
+ return;
+ }
+
+ if (!success)
+ cmd->transport_state |= CMD_T_FAILED;
+
+ /*
+ * Decrement the outstanding t_task_cdbs_left count. The last
+ * struct se_task from struct se_cmd will complete itself into the
+ * device queue depending upon int success.
+ */
+ if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return;
+ }
+ /*
+ * Check for case where an explict ABORT_TASK has been received
+ * and transport_wait_for_tasks() will be waiting for completion..
+ */
+ if (cmd->transport_state & CMD_T_ABORTED &&
+ cmd->transport_state & CMD_T_STOP) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ complete(&cmd->t_transport_stop_comp);
+ return;
+ } else if (cmd->transport_state & CMD_T_FAILED) {
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ INIT_WORK(&cmd->work, target_complete_failure_work);
+ } else {
+ INIT_WORK(&cmd->work, target_complete_ok_work);
+ }
+
+ cmd->t_state = TRANSPORT_COMPLETE;
+ cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ queue_work(target_completion_wq, &cmd->work);
+}
+EXPORT_SYMBOL(transport_complete_task);
+
+/*
+ * Called by transport_add_tasks_from_cmd() once a struct se_cmd's
+ * struct se_task list are ready to be added to the active execution list
+ * struct se_device
+
+ * Called with se_dev_t->execute_task_lock called.
+ */
+static inline int transport_add_task_check_sam_attr(
+ struct se_task *task,
+ struct se_task *task_prev,
+ struct se_device *dev)
+{
+ /*
+ * No SAM Task attribute emulation enabled, add to tail of
+ * execution queue
+ */
+ if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) {
+ list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+ return 0;
+ }
+ /*
+ * HEAD_OF_QUEUE attribute for received CDB, which means
+ * the first task that is associated with a struct se_cmd goes to
+ * head of the struct se_device->execute_task_list, and task_prev
+ * after that for each subsequent task
+ */
+ if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) {
+ list_add(&task->t_execute_list,
+ (task_prev != NULL) ?
+ &task_prev->t_execute_list :
+ &dev->execute_task_list);
+
+ pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x"
+ " in execution queue\n",
+ task->task_se_cmd->t_task_cdb[0]);
+ return 1;
+ }
+ /*
+ * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been
+ * transitioned from Dermant -> Active state, and are added to the end
+ * of the struct se_device->execute_task_list
+ */
+ list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+ return 0;
+}
+
+/* __transport_add_task_to_execute_queue():
+ *
+ * Called with se_dev_t->execute_task_lock called.
+ */
+static void __transport_add_task_to_execute_queue(
+ struct se_task *task,
+ struct se_task *task_prev,
+ struct se_device *dev)
+{
+ int head_of_queue;
+
+ head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev);
+ atomic_inc(&dev->execute_tasks);
+
+ if (task->t_state_active)
+ return;
+ /*
+ * Determine if this task needs to go to HEAD_OF_QUEUE for the
+ * state list as well. Running with SAM Task Attribute emulation
+ * will always return head_of_queue == 0 here
+ */
+ if (head_of_queue)
+ list_add(&task->t_state_list, (task_prev) ?
+ &task_prev->t_state_list :
+ &dev->state_task_list);
+ else
+ list_add_tail(&task->t_state_list, &dev->state_task_list);
+
+ task->t_state_active = true;
+
+ pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n",
+ task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd),
+ task, dev);
+}
+
+static void transport_add_tasks_to_state_queue(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_task *task;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_for_each_entry(task, &cmd->t_task_list, t_list) {
+ spin_lock(&dev->execute_task_lock);
+ if (!task->t_state_active) {
+ list_add_tail(&task->t_state_list,
+ &dev->state_task_list);
+ task->t_state_active = true;
+
+ pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n",
+ task->task_se_cmd->se_tfo->get_task_tag(
+ task->task_se_cmd), task, dev);
+ }
+ spin_unlock(&dev->execute_task_lock);
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+}
+
+static void __transport_add_tasks_from_cmd(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_task *task, *task_prev = NULL;
+
+ list_for_each_entry(task, &cmd->t_task_list, t_list) {
+ if (!list_empty(&task->t_execute_list))
+ continue;
+ /*
+ * __transport_add_task_to_execute_queue() handles the
+ * SAM Task Attribute emulation if enabled
+ */
+ __transport_add_task_to_execute_queue(task, task_prev, dev);
+ task_prev = task;
+ }
+}
+
+static void transport_add_tasks_from_cmd(struct se_cmd *cmd)
+{
+ unsigned long flags;
+ struct se_device *dev = cmd->se_dev;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ __transport_add_tasks_from_cmd(cmd);
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+}
+
+void __transport_remove_task_from_execute_queue(struct se_task *task,
+ struct se_device *dev)
+{
+ list_del_init(&task->t_execute_list);
+ atomic_dec(&dev->execute_tasks);
+}
+
+static void transport_remove_task_from_execute_queue(
+ struct se_task *task,
+ struct se_device *dev)
+{
+ unsigned long flags;
+
+ if (WARN_ON(list_empty(&task->t_execute_list)))
+ return;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ __transport_remove_task_from_execute_queue(task, dev);
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+}
+
+/*
+ * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status
+ */
+
+static void target_qf_do_work(struct work_struct *work)
+{
+ struct se_device *dev = container_of(work, struct se_device,
+ qf_work_queue);
+ LIST_HEAD(qf_cmd_list);
+ struct se_cmd *cmd, *cmd_tmp;
+
+ spin_lock_irq(&dev->qf_cmd_lock);
+ list_splice_init(&dev->qf_cmd_list, &qf_cmd_list);
+ spin_unlock_irq(&dev->qf_cmd_lock);
+
+ list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) {
+ list_del(&cmd->se_qf_node);
+ atomic_dec(&dev->dev_qf_count);
+ smp_mb__after_atomic_dec();
+
+ pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue"
+ " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd,
+ (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" :
+ (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING"
+ : "UNKNOWN");
+
+ transport_add_cmd_to_queue(cmd, cmd->t_state, true);
+ }
+}
+
+unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd)
+{
+ switch (cmd->data_direction) {
+ case DMA_NONE:
+ return "NONE";
+ case DMA_FROM_DEVICE:
+ return "READ";
+ case DMA_TO_DEVICE:
+ return "WRITE";
+ case DMA_BIDIRECTIONAL:
+ return "BIDI";
+ default:
+ break;
+ }
+
+ return "UNKNOWN";
+}
+
+void transport_dump_dev_state(
+ struct se_device *dev,
+ char *b,
+ int *bl)
+{
+ *bl += sprintf(b + *bl, "Status: ");
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ *bl += sprintf(b + *bl, "ACTIVATED");
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ *bl += sprintf(b + *bl, "DEACTIVATED");
+ break;
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ *bl += sprintf(b + *bl, "SHUTDOWN");
+ break;
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ *bl += sprintf(b + *bl, "OFFLINE");
+ break;
+ default:
+ *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status);
+ break;
+ }
+
+ *bl += sprintf(b + *bl, " Execute/Max Queue Depth: %d/%d",
+ atomic_read(&dev->execute_tasks), dev->queue_depth);
+ *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n",
+ dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors);
+ *bl += sprintf(b + *bl, " ");
+}
+
+void transport_dump_vpd_proto_id(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Protocol Identifier: ");
+
+ switch (vpd->protocol_identifier) {
+ case 0x00:
+ sprintf(buf+len, "Fibre Channel\n");
+ break;
+ case 0x10:
+ sprintf(buf+len, "Parallel SCSI\n");
+ break;
+ case 0x20:
+ sprintf(buf+len, "SSA\n");
+ break;
+ case 0x30:
+ sprintf(buf+len, "IEEE 1394\n");
+ break;
+ case 0x40:
+ sprintf(buf+len, "SCSI Remote Direct Memory Access"
+ " Protocol\n");
+ break;
+ case 0x50:
+ sprintf(buf+len, "Internet SCSI (iSCSI)\n");
+ break;
+ case 0x60:
+ sprintf(buf+len, "SAS Serial SCSI Protocol\n");
+ break;
+ case 0x70:
+ sprintf(buf+len, "Automation/Drive Interface Transport"
+ " Protocol\n");
+ break;
+ case 0x80:
+ sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n");
+ break;
+ default:
+ sprintf(buf+len, "Unknown 0x%02x\n",
+ vpd->protocol_identifier);
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ pr_debug("%s", buf);
+}
+
+void
+transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * Check if the Protocol Identifier Valid (PIV) bit is set..
+ *
+ * from spc3r23.pdf section 7.5.1
+ */
+ if (page_83[1] & 0x80) {
+ vpd->protocol_identifier = (page_83[0] & 0xf0);
+ vpd->protocol_identifier_set = 1;
+ transport_dump_vpd_proto_id(vpd, NULL, 0);
+ }
+}
+EXPORT_SYMBOL(transport_set_vpd_proto_id);
+
+int transport_dump_vpd_assoc(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0;
+ int len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Identifier Association: ");
+
+ switch (vpd->association) {
+ case 0x00:
+ sprintf(buf+len, "addressed logical unit\n");
+ break;
+ case 0x10:
+ sprintf(buf+len, "target port\n");
+ break;
+ case 0x20:
+ sprintf(buf+len, "SCSI target device\n");
+ break;
+ default:
+ sprintf(buf+len, "Unknown 0x%02x\n", vpd->association);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ pr_debug("%s", buf);
+
+ return ret;
+}
+
+int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * The VPD identification association..
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 297
+ */
+ vpd->association = (page_83[1] & 0x30);
+ return transport_dump_vpd_assoc(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_assoc);
+
+int transport_dump_vpd_ident_type(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0;
+ int len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Identifier Type: ");
+
+ switch (vpd->device_identifier_type) {
+ case 0x00:
+ sprintf(buf+len, "Vendor specific\n");
+ break;
+ case 0x01:
+ sprintf(buf+len, "T10 Vendor ID based\n");
+ break;
+ case 0x02:
+ sprintf(buf+len, "EUI-64 based\n");
+ break;
+ case 0x03:
+ sprintf(buf+len, "NAA\n");
+ break;
+ case 0x04:
+ sprintf(buf+len, "Relative target port identifier\n");
+ break;
+ case 0x08:
+ sprintf(buf+len, "SCSI name string\n");
+ break;
+ default:
+ sprintf(buf+len, "Unsupported: 0x%02x\n",
+ vpd->device_identifier_type);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (p_buf) {
+ if (p_buf_len < strlen(buf)+1)
+ return -EINVAL;
+ strncpy(p_buf, buf, p_buf_len);
+ } else {
+ pr_debug("%s", buf);
+ }
+
+ return ret;
+}
+
+int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * The VPD identifier type..
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 298
+ */
+ vpd->device_identifier_type = (page_83[1] & 0x0f);
+ return transport_dump_vpd_ident_type(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_ident_type);
+
+int transport_dump_vpd_ident(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+ switch (vpd->device_identifier_code_set) {
+ case 0x01: /* Binary */
+ sprintf(buf, "T10 VPD Binary Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ case 0x02: /* ASCII */
+ sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ case 0x03: /* UTF-8 */
+ sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ default:
+ sprintf(buf, "T10 VPD Device Identifier encoding unsupported:"
+ " 0x%02x", vpd->device_identifier_code_set);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ pr_debug("%s", buf);
+
+ return ret;
+}
+
+int
+transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ static const char hex_str[] = "0123456789abcdef";
+ int j = 0, i = 4; /* offset to start of the identifer */
+
+ /*
+ * The VPD Code Set (encoding)
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 296
+ */
+ vpd->device_identifier_code_set = (page_83[0] & 0x0f);
+ switch (vpd->device_identifier_code_set) {
+ case 0x01: /* Binary */
+ vpd->device_identifier[j++] =
+ hex_str[vpd->device_identifier_type];
+ while (i < (4 + page_83[3])) {
+ vpd->device_identifier[j++] =
+ hex_str[(page_83[i] & 0xf0) >> 4];
+ vpd->device_identifier[j++] =
+ hex_str[page_83[i] & 0x0f];
+ i++;
+ }
+ break;
+ case 0x02: /* ASCII */
+ case 0x03: /* UTF-8 */
+ while (i < (4 + page_83[3]))
+ vpd->device_identifier[j++] = page_83[i++];
+ break;
+ default:
+ break;
+ }
+
+ return transport_dump_vpd_ident(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_ident);
+
+static void core_setup_task_attr_emulation(struct se_device *dev)
+{
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, disable the
+ * SAM Task Attribute emulation.
+ *
+ * This is currently not available in upsream Linux/SCSI Target
+ * mode code, and is assumed to be disabled while using TCM/pSCSI.
+ */
+ if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH;
+ return;
+ }
+
+ dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED;
+ pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x"
+ " device\n", dev->transport->name,
+ dev->transport->get_device_rev(dev));
+}
+
+static void scsi_dump_inquiry(struct se_device *dev)
+{
+ struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
+ char buf[17];
+ int i, device_type;
+ /*
+ * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
+ */
+ for (i = 0; i < 8; i++)
+ if (wwn->vendor[i] >= 0x20)
+ buf[i] = wwn->vendor[i];
+ else
+ buf[i] = ' ';
+ buf[i] = '\0';
+ pr_debug(" Vendor: %s\n", buf);
+
+ for (i = 0; i < 16; i++)
+ if (wwn->model[i] >= 0x20)
+ buf[i] = wwn->model[i];
+ else
+ buf[i] = ' ';
+ buf[i] = '\0';
+ pr_debug(" Model: %s\n", buf);
+
+ for (i = 0; i < 4; i++)
+ if (wwn->revision[i] >= 0x20)
+ buf[i] = wwn->revision[i];
+ else
+ buf[i] = ' ';
+ buf[i] = '\0';
+ pr_debug(" Revision: %s\n", buf);
+
+ device_type = dev->transport->get_device_type(dev);
+ pr_debug(" Type: %s ", scsi_device_type(device_type));
+ pr_debug(" ANSI SCSI revision: %02x\n",
+ dev->transport->get_device_rev(dev));
+}
+
+struct se_device *transport_add_device_to_core_hba(
+ struct se_hba *hba,
+ struct se_subsystem_api *transport,
+ struct se_subsystem_dev *se_dev,
+ u32 device_flags,
+ void *transport_dev,
+ struct se_dev_limits *dev_limits,
+ const char *inquiry_prod,
+ const char *inquiry_rev)
+{
+ int force_pt;
+ struct se_device *dev;
+
+ dev = kzalloc(sizeof(struct se_device), GFP_KERNEL);
+ if (!dev) {
+ pr_err("Unable to allocate memory for se_dev_t\n");
+ return NULL;
+ }
+
+ transport_init_queue_obj(&dev->dev_queue_obj);
+ dev->dev_flags = device_flags;
+ dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
+ dev->dev_ptr = transport_dev;
+ dev->se_hba = hba;
+ dev->se_sub_dev = se_dev;
+ dev->transport = transport;
+ dev->dev_link_magic = SE_DEV_LINK_MAGIC;
+ INIT_LIST_HEAD(&dev->dev_list);
+ INIT_LIST_HEAD(&dev->dev_sep_list);
+ INIT_LIST_HEAD(&dev->dev_tmr_list);
+ INIT_LIST_HEAD(&dev->execute_task_list);
+ INIT_LIST_HEAD(&dev->delayed_cmd_list);
+ INIT_LIST_HEAD(&dev->state_task_list);
+ INIT_LIST_HEAD(&dev->qf_cmd_list);
+ spin_lock_init(&dev->execute_task_lock);
+ spin_lock_init(&dev->delayed_cmd_lock);
+ spin_lock_init(&dev->dev_reservation_lock);
+ spin_lock_init(&dev->dev_status_lock);
+ spin_lock_init(&dev->se_port_lock);
+ spin_lock_init(&dev->se_tmr_lock);
+ spin_lock_init(&dev->qf_cmd_lock);
+ atomic_set(&dev->dev_ordered_id, 0);
+
+ se_dev_set_default_attribs(dev, dev_limits);
+
+ dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
+ dev->creation_time = get_jiffies_64();
+ spin_lock_init(&dev->stats_lock);
+
+ spin_lock(&hba->device_lock);
+ list_add_tail(&dev->dev_list, &hba->hba_dev_list);
+ hba->dev_count++;
+ spin_unlock(&hba->device_lock);
+ /*
+ * Setup the SAM Task Attribute emulation for struct se_device
+ */
+ core_setup_task_attr_emulation(dev);
+ /*
+ * Force PR and ALUA passthrough emulation with internal object use.
+ */
+ force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE);
+ /*
+ * Setup the Reservations infrastructure for struct se_device
+ */
+ core_setup_reservations(dev, force_pt);
+ /*
+ * Setup the Asymmetric Logical Unit Assignment for struct se_device
+ */
+ if (core_setup_alua(dev, force_pt) < 0)
+ goto out;
+
+ /*
+ * Startup the struct se_device processing thread
+ */
+ dev->process_thread = kthread_run(transport_processing_thread, dev,
+ "LIO_%s", dev->transport->name);
+ if (IS_ERR(dev->process_thread)) {
+ pr_err("Unable to create kthread: LIO_%s\n",
+ dev->transport->name);
+ goto out;
+ }
+ /*
+ * Setup work_queue for QUEUE_FULL
+ */
+ INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
+ /*
+ * Preload the initial INQUIRY const values if we are doing
+ * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
+ * passthrough because this is being provided by the backend LLD.
+ * This is required so that transport_get_inquiry() copies these
+ * originals once back into DEV_T10_WWN(dev) for the virtual device
+ * setup.
+ */
+ if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (!inquiry_prod || !inquiry_rev) {
+ pr_err("All non TCM/pSCSI plugins require"
+ " INQUIRY consts\n");
+ goto out;
+ }
+
+ strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8);
+ strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16);
+ strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4);
+ }
+ scsi_dump_inquiry(dev);
+
+ return dev;
+out:
+ kthread_stop(dev->process_thread);
+
+ spin_lock(&hba->device_lock);
+ list_del(&dev->dev_list);
+ hba->dev_count--;
+ spin_unlock(&hba->device_lock);
+
+ se_release_vpd_for_dev(dev);
+
+ kfree(dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(transport_add_device_to_core_hba);
+
+/* transport_generic_prepare_cdb():
+ *
+ * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will
+ * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2.
+ * The point of this is since we are mapping iSCSI LUNs to
+ * SCSI Target IDs having a non-zero LUN in the CDB will throw the
+ * devices and HBAs for a loop.
+ */
+static inline void transport_generic_prepare_cdb(
+ unsigned char *cdb)
+{
+ switch (cdb[0]) {
+ case READ_10: /* SBC - RDProtect */
+ case READ_12: /* SBC - RDProtect */
+ case READ_16: /* SBC - RDProtect */
+ case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
+ case VERIFY: /* SBC - VRProtect */
+ case VERIFY_16: /* SBC - VRProtect */
+ case WRITE_VERIFY: /* SBC - VRProtect */
+ case WRITE_VERIFY_12: /* SBC - VRProtect */
+ case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
+ break;
+ default:
+ cdb[1] &= 0x1f; /* clear logical unit number */
+ break;
+ }
+}
+
+static struct se_task *
+transport_generic_get_task(struct se_cmd *cmd,
+ enum dma_data_direction data_direction)
+{
+ struct se_task *task;
+ struct se_device *dev = cmd->se_dev;
+
+ task = dev->transport->alloc_task(cmd->t_task_cdb);
+ if (!task) {
+ pr_err("Unable to allocate struct se_task\n");
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&task->t_list);
+ INIT_LIST_HEAD(&task->t_execute_list);
+ INIT_LIST_HEAD(&task->t_state_list);
+ init_completion(&task->task_stop_comp);
+ task->task_se_cmd = cmd;
+ task->task_data_direction = data_direction;
+
+ return task;
+}
+
+static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *);
+
+/*
+ * Used by fabric modules containing a local struct se_cmd within their
+ * fabric dependent per I/O descriptor.
+ */
+void transport_init_se_cmd(
+ struct se_cmd *cmd,
+ struct target_core_fabric_ops *tfo,
+ struct se_session *se_sess,
+ u32 data_length,
+ int data_direction,
+ int task_attr,
+ unsigned char *sense_buffer)
+{
+ INIT_LIST_HEAD(&cmd->se_lun_node);
+ INIT_LIST_HEAD(&cmd->se_delayed_node);
+ INIT_LIST_HEAD(&cmd->se_qf_node);
+ INIT_LIST_HEAD(&cmd->se_queue_node);
+ INIT_LIST_HEAD(&cmd->se_cmd_list);
+ INIT_LIST_HEAD(&cmd->t_task_list);
+ init_completion(&cmd->transport_lun_fe_stop_comp);
+ init_completion(&cmd->transport_lun_stop_comp);
+ init_completion(&cmd->t_transport_stop_comp);
+ init_completion(&cmd->cmd_wait_comp);
+ spin_lock_init(&cmd->t_state_lock);
+ cmd->transport_state = CMD_T_DEV_ACTIVE;
+
+ cmd->se_tfo = tfo;
+ cmd->se_sess = se_sess;
+ cmd->data_length = data_length;
+ cmd->data_direction = data_direction;
+ cmd->sam_task_attr = task_attr;
+ cmd->sense_buffer = sense_buffer;
+}
+EXPORT_SYMBOL(transport_init_se_cmd);
+
+static int transport_check_alloc_task_attr(struct se_cmd *cmd)
+{
+ /*
+ * Check if SAM Task Attribute emulation is enabled for this
+ * struct se_device storage object
+ */
+ if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
+ return 0;
+
+ if (cmd->sam_task_attr == MSG_ACA_TAG) {
+ pr_debug("SAM Task Attribute ACA"
+ " emulation is not supported\n");
+ return -EINVAL;
+ }
+ /*
+ * Used to determine when ORDERED commands should go from
+ * Dormant to Active status.
+ */
+ cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id);
+ smp_mb__after_atomic_inc();
+ pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
+ cmd->se_ordered_id, cmd->sam_task_attr,
+ cmd->se_dev->transport->name);
+ return 0;
+}
+
+/* transport_generic_allocate_tasks():
+ *
+ * Called from fabric RX Thread.
+ */
+int transport_generic_allocate_tasks(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ int ret;
+
+ transport_generic_prepare_cdb(cdb);
+ /*
+ * Ensure that the received CDB is less than the max (252 + 8) bytes
+ * for VARIABLE_LENGTH_CMD
+ */
+ if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) {
+ pr_err("Received SCSI CDB with command_size: %d that"
+ " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
+ scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE);
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+ /*
+ * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
+ * allocate the additional extended CDB buffer now.. Otherwise
+ * setup the pointer from __t_task_cdb to t_task_cdb.
+ */
+ if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) {
+ cmd->t_task_cdb = kzalloc(scsi_command_size(cdb),
+ GFP_KERNEL);
+ if (!cmd->t_task_cdb) {
+ pr_err("Unable to allocate cmd->t_task_cdb"
+ " %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
+ scsi_command_size(cdb),
+ (unsigned long)sizeof(cmd->__t_task_cdb));
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+ }
+ } else
+ cmd->t_task_cdb = &cmd->__t_task_cdb[0];
+ /*
+ * Copy the original CDB into cmd->
+ */
+ memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb));
+ /*
+ * Setup the received CDB based on SCSI defined opcodes and
+ * perform unit attention, persistent reservations and ALUA
+ * checks for virtual device backends. The cmd->t_task_cdb
+ * pointer is expected to be setup before we reach this point.
+ */
+ ret = transport_generic_cmd_sequencer(cmd, cdb);
+ if (ret < 0)
+ return ret;
+ /*
+ * Check for SAM Task Attribute Emulation
+ */
+ if (transport_check_alloc_task_attr(cmd) < 0) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (cmd->se_lun->lun_sep)
+ cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_allocate_tasks);
+
+/*
+ * Used by fabric module frontends to queue tasks directly.
+ * Many only be used from process context only
+ */
+int transport_handle_cdb_direct(
+ struct se_cmd *cmd)
+{
+ int ret;
+
+ if (!cmd->se_lun) {
+ dump_stack();
+ pr_err("cmd->se_lun is NULL\n");
+ return -EINVAL;
+ }
+ if (in_interrupt()) {
+ dump_stack();
+ pr_err("transport_generic_handle_cdb cannot be called"
+ " from interrupt context\n");
+ return -EINVAL;
+ }
+ /*
+ * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE following
+ * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue()
+ * in existing usage to ensure that outstanding descriptors are handled
+ * correctly during shutdown via transport_wait_for_tasks()
+ *
+ * Also, we don't take cmd->t_state_lock here as we only expect
+ * this to be called for initial descriptor submission.
+ */
+ cmd->t_state = TRANSPORT_NEW_CMD;
+ cmd->transport_state |= CMD_T_ACTIVE;
+
+ /*
+ * transport_generic_new_cmd() is already handling QUEUE_FULL,
+ * so follow TRANSPORT_NEW_CMD processing thread context usage
+ * and call transport_generic_request_failure() if necessary..
+ */
+ ret = transport_generic_new_cmd(cmd);
+ if (ret < 0)
+ transport_generic_request_failure(cmd);
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_handle_cdb_direct);
+
+/**
+ * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
+ *
+ * @se_cmd: command descriptor to submit
+ * @se_sess: associated se_sess for endpoint
+ * @cdb: pointer to SCSI CDB
+ * @sense: pointer to SCSI sense buffer
+ * @unpacked_lun: unpacked LUN to reference for struct se_lun
+ * @data_length: fabric expected data transfer length
+ * @task_addr: SAM task attribute
+ * @data_dir: DMA data direction
+ * @flags: flags for command submission from target_sc_flags_tables
+ *
+ * This may only be called from process context, and also currently
+ * assumes internal allocation of fabric payload buffer by target-core.
+ **/
+void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
+ unsigned char *cdb, unsigned char *sense, u32 unpacked_lun,
+ u32 data_length, int task_attr, int data_dir, int flags)
+{
+ struct se_portal_group *se_tpg;
+ int rc;
+
+ se_tpg = se_sess->se_tpg;
+ BUG_ON(!se_tpg);
+ BUG_ON(se_cmd->se_tfo || se_cmd->se_sess);
+ BUG_ON(in_interrupt());
+ /*
+ * Initialize se_cmd for target operation. From this point
+ * exceptions are handled by sending exception status via
+ * target_core_fabric_ops->queue_status() callback
+ */
+ transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
+ data_length, data_dir, task_attr, sense);
+ /*
+ * Obtain struct se_cmd->cmd_kref reference and add new cmd to
+ * se_sess->sess_cmd_list. A second kref_get here is necessary
+ * for fabrics using TARGET_SCF_ACK_KREF that expect a second
+ * kref_put() to happen during fabric packet acknowledgement.
+ */
+ target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
+ /*
+ * Signal bidirectional data payloads to target-core
+ */
+ if (flags & TARGET_SCF_BIDI_OP)
+ se_cmd->se_cmd_flags |= SCF_BIDI;
+ /*
+ * Locate se_lun pointer and attach it to struct se_cmd
+ */
+ if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) {
+ transport_send_check_condition_and_sense(se_cmd,
+ se_cmd->scsi_sense_reason, 0);
+ target_put_sess_cmd(se_sess, se_cmd);
+ return;
+ }
+ /*
+ * Sanitize CDBs via transport_generic_cmd_sequencer() and
+ * allocate the necessary tasks to complete the received CDB+data
+ */
+ rc = transport_generic_allocate_tasks(se_cmd, cdb);
+ if (rc != 0) {
+ transport_generic_request_failure(se_cmd);
+ return;
+ }
+ /*
+ * Dispatch se_cmd descriptor to se_lun->lun_se_dev backend
+ * for immediate execution of READs, otherwise wait for
+ * transport_generic_handle_data() to be called for WRITEs
+ * when fabric has filled the incoming buffer.
+ */
+ transport_handle_cdb_direct(se_cmd);
+ return;
+}
+EXPORT_SYMBOL(target_submit_cmd);
+
+static void target_complete_tmr_failure(struct work_struct *work)
+{
+ struct se_cmd *se_cmd = container_of(work, struct se_cmd, work);
+
+ se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
+ se_cmd->se_tfo->queue_tm_rsp(se_cmd);
+
+ transport_cmd_check_stop_to_fabric(se_cmd);
+}
+
+/**
+ * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
+ * for TMR CDBs
+ *
+ * @se_cmd: command descriptor to submit
+ * @se_sess: associated se_sess for endpoint
+ * @sense: pointer to SCSI sense buffer
+ * @unpacked_lun: unpacked LUN to reference for struct se_lun
+ * @fabric_context: fabric context for TMR req
+ * @tm_type: Type of TM request
+ * @gfp: gfp type for caller
+ * @tag: referenced task tag for TMR_ABORT_TASK
+ * @flags: submit cmd flags
+ *
+ * Callable from all contexts.
+ **/
+
+int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
+ unsigned char *sense, u32 unpacked_lun,
+ void *fabric_tmr_ptr, unsigned char tm_type,
+ gfp_t gfp, unsigned int tag, int flags)
+{
+ struct se_portal_group *se_tpg;
+ int ret;
+
+ se_tpg = se_sess->se_tpg;
+ BUG_ON(!se_tpg);
+
+ transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
+ 0, DMA_NONE, MSG_SIMPLE_TAG, sense);
+ /*
+ * FIXME: Currently expect caller to handle se_cmd->se_tmr_req
+ * allocation failure.
+ */
+ ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp);
+ if (ret < 0)
+ return -ENOMEM;
+
+ if (tm_type == TMR_ABORT_TASK)
+ se_cmd->se_tmr_req->ref_task_tag = tag;
+
+ /* See target_submit_cmd for commentary */
+ target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
+
+ ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
+ if (ret) {
+ /*
+ * For callback during failure handling, push this work off
+ * to process context with TMR_LUN_DOES_NOT_EXIST status.
+ */
+ INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
+ schedule_work(&se_cmd->work);
+ return 0;
+ }
+ transport_generic_handle_tmr(se_cmd);
+ return 0;
+}
+EXPORT_SYMBOL(target_submit_tmr);
+
+/*
+ * Used by fabric module frontends defining a TFO->new_cmd_map() caller
+ * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to
+ * complete setup in TCM process context w/ TFO->new_cmd_map().
+ */
+int transport_generic_handle_cdb_map(
+ struct se_cmd *cmd)
+{
+ if (!cmd->se_lun) {
+ dump_stack();
+ pr_err("cmd->se_lun is NULL\n");
+ return -EINVAL;
+ }
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_cdb_map);
+
+/* transport_generic_handle_data():
+ *
+ *
+ */
+int transport_generic_handle_data(
+ struct se_cmd *cmd)
+{
+ /*
+ * For the software fabric case, then we assume the nexus is being
+ * failed/shutdown when signals are pending from the kthread context
+ * caller, so we return a failure. For the HW target mode case running
+ * in interrupt code, the signal_pending() check is skipped.
+ */
+ if (!in_interrupt() && signal_pending(current))
+ return -EPERM;
+ /*
+ * If the received CDB has aleady been ABORTED by the generic
+ * target engine, we now call transport_check_aborted_status()
+ * to queue any delated TASK_ABORTED status for the received CDB to the
+ * fabric module as we are expecting no further incoming DATA OUT
+ * sequences at this point.
+ */
+ if (transport_check_aborted_status(cmd, 1) != 0)
+ return 0;
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_data);
+
+/* transport_generic_handle_tmr():
+ *
+ *
+ */
+int transport_generic_handle_tmr(
+ struct se_cmd *cmd)
+{
+ transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_tmr);
+
+/*
+ * If the task is active, request it to be stopped and sleep until it
+ * has completed.
+ */
+bool target_stop_task(struct se_task *task, unsigned long *flags)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ bool was_active = false;
+
+ if (task->task_flags & TF_ACTIVE) {
+ task->task_flags |= TF_REQUEST_STOP;
+ spin_unlock_irqrestore(&cmd->t_state_lock, *flags);
+
+ pr_debug("Task %p waiting to complete\n", task);
+ wait_for_completion(&task->task_stop_comp);
+ pr_debug("Task %p stopped successfully\n", task);
+
+ spin_lock_irqsave(&cmd->t_state_lock, *flags);
+ atomic_dec(&cmd->t_task_cdbs_left);
+ task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP);
+ was_active = true;
+ }
+
+ return was_active;
+}
+
+static int transport_stop_tasks_for_cmd(struct se_cmd *cmd)
+{
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+ int ret = 0;
+
+ pr_debug("ITT[0x%08x] - Stopping tasks\n",
+ cmd->se_tfo->get_task_tag(cmd));
+
+ /*
+ * No tasks remain in the execution queue
+ */
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_for_each_entry_safe(task, task_tmp,
+ &cmd->t_task_list, t_list) {
+ pr_debug("Processing task %p\n", task);
+ /*
+ * If the struct se_task has not been sent and is not active,
+ * remove the struct se_task from the execution queue.
+ */
+ if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) {
+ spin_unlock_irqrestore(&cmd->t_state_lock,
+ flags);
+ transport_remove_task_from_execute_queue(task,
+ cmd->se_dev);
+
+ pr_debug("Task %p removed from execute queue\n", task);
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ continue;
+ }
+
+ if (!target_stop_task(task, &flags)) {
+ pr_debug("Task %p - did nothing\n", task);
+ ret++;
+ }
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return ret;
+}
+
+/*
+ * Handle SAM-esque emulation for generic transport request failures.
+ */
+void transport_generic_request_failure(struct se_cmd *cmd)
+{
+ int ret = 0;
+
+ pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
+ " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd),
+ cmd->t_task_cdb[0]);
+ pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n",
+ cmd->se_tfo->get_cmd_state(cmd),
+ cmd->t_state, cmd->scsi_sense_reason);
+ pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d"
+ " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --"
+ " CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
+ cmd->t_task_list_num,
+ atomic_read(&cmd->t_task_cdbs_left),
+ atomic_read(&cmd->t_task_cdbs_sent),
+ atomic_read(&cmd->t_task_cdbs_ex_left),
+ (cmd->transport_state & CMD_T_ACTIVE) != 0,
+ (cmd->transport_state & CMD_T_STOP) != 0,
+ (cmd->transport_state & CMD_T_SENT) != 0);
+
+ /*
+ * For SAM Task Attribute emulation for failed struct se_cmd
+ */
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ transport_complete_task_attr(cmd);
+
+ switch (cmd->scsi_sense_reason) {
+ case TCM_NON_EXISTENT_LUN:
+ case TCM_UNSUPPORTED_SCSI_OPCODE:
+ case TCM_INVALID_CDB_FIELD:
+ case TCM_INVALID_PARAMETER_LIST:
+ case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
+ case TCM_UNKNOWN_MODE_PAGE:
+ case TCM_WRITE_PROTECTED:
+ case TCM_ADDRESS_OUT_OF_RANGE:
+ case TCM_CHECK_CONDITION_ABORT_CMD:
+ case TCM_CHECK_CONDITION_UNIT_ATTENTION:
+ case TCM_CHECK_CONDITION_NOT_READY:
+ break;
+ case TCM_RESERVATION_CONFLICT:
+ /*
+ * No SENSE Data payload for this case, set SCSI Status
+ * and queue the response to $FABRIC_MOD.
+ *
+ * Uses linux/include/scsi/scsi.h SAM status codes defs
+ */
+ cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+ /*
+ * For UA Interlock Code 11b, a RESERVATION CONFLICT will
+ * establish a UNIT ATTENTION with PREVIOUS RESERVATION
+ * CONFLICT STATUS.
+ *
+ * See spc4r17, section 7.4.6 Control Mode Page, Table 349
+ */
+ if (cmd->se_sess &&
+ cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2)
+ core_scsi3_ua_allocate(cmd->se_sess->se_node_acl,
+ cmd->orig_fe_lun, 0x2C,
+ ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+
+ ret = cmd->se_tfo->queue_status(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+ goto check_stop;
+ default:
+ pr_err("Unknown transport error for CDB 0x%02x: %d\n",
+ cmd->t_task_cdb[0], cmd->scsi_sense_reason);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ break;
+ }
+ /*
+ * If a fabric does not define a cmd->se_tfo->new_cmd_map caller,
+ * make the call to transport_send_check_condition_and_sense()
+ * directly. Otherwise expect the fabric to make the call to
+ * transport_send_check_condition_and_sense() after handling
+ * possible unsoliticied write data payloads.
+ */
+ ret = transport_send_check_condition_and_sense(cmd,
+ cmd->scsi_sense_reason, 0);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+
+check_stop:
+ transport_lun_remove_cmd(cmd);
+ if (!transport_cmd_check_stop_to_fabric(cmd))
+ ;
+ return;
+
+queue_full:
+ cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
+ transport_handle_queue_full(cmd, cmd->se_dev);
+}
+EXPORT_SYMBOL(transport_generic_request_failure);
+
+static inline u32 transport_lba_21(unsigned char *cdb)
+{
+ return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
+}
+
+static inline u32 transport_lba_32(unsigned char *cdb)
+{
+ return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+}
+
+static inline unsigned long long transport_lba_64(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+ __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+/*
+ * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs
+ */
+static inline unsigned long long transport_lba_64_ext(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15];
+ __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&se_cmd->t_state_lock, flags);
+ se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
+ spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
+}
+
+/*
+ * Called from Fabric Module context from transport_execute_tasks()
+ *
+ * The return of this function determins if the tasks from struct se_cmd
+ * get added to the execution queue in transport_execute_tasks(),
+ * or are added to the delayed or ordered lists here.
+ */
+static inline int transport_execute_task_attr(struct se_cmd *cmd)
+{
+ if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
+ return 1;
+ /*
+ * Check for the existence of HEAD_OF_QUEUE, and if true return 1
+ * to allow the passed struct se_cmd list of tasks to the front of the list.
+ */
+ if (cmd->sam_task_attr == MSG_HEAD_TAG) {
+ pr_debug("Added HEAD_OF_QUEUE for CDB:"
+ " 0x%02x, se_ordered_id: %u\n",
+ cmd->t_task_cdb[0],
+ cmd->se_ordered_id);
+ return 1;
+ } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {
+ atomic_inc(&cmd->se_dev->dev_ordered_sync);
+ smp_mb__after_atomic_inc();
+
+ pr_debug("Added ORDERED for CDB: 0x%02x to ordered"
+ " list, se_ordered_id: %u\n",
+ cmd->t_task_cdb[0],
+ cmd->se_ordered_id);
+ /*
+ * Add ORDERED command to tail of execution queue if
+ * no other older commands exist that need to be
+ * completed first.
+ */
+ if (!atomic_read(&cmd->se_dev->simple_cmds))
+ return 1;
+ } else {
+ /*
+ * For SIMPLE and UNTAGGED Task Attribute commands
+ */
+ atomic_inc(&cmd->se_dev->simple_cmds);
+ smp_mb__after_atomic_inc();
+ }
+ /*
+ * Otherwise if one or more outstanding ORDERED task attribute exist,
+ * add the dormant task(s) built for the passed struct se_cmd to the
+ * execution queue and become in Active state for this struct se_device.
+ */
+ if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) {
+ /*
+ * Otherwise, add cmd w/ tasks to delayed cmd queue that
+ * will be drained upon completion of HEAD_OF_QUEUE task.
+ */
+ spin_lock(&cmd->se_dev->delayed_cmd_lock);
+ cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR;
+ list_add_tail(&cmd->se_delayed_node,
+ &cmd->se_dev->delayed_cmd_list);
+ spin_unlock(&cmd->se_dev->delayed_cmd_lock);
+
+ pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
+ " delayed CMD list, se_ordered_id: %u\n",
+ cmd->t_task_cdb[0], cmd->sam_task_attr,
+ cmd->se_ordered_id);
+ /*
+ * Return zero to let transport_execute_tasks() know
+ * not to add the delayed tasks to the execution list.
+ */
+ return 0;
+ }
+ /*
+ * Otherwise, no ORDERED task attributes exist..
+ */
+ return 1;
+}
+
+/*
+ * Called from fabric module context in transport_generic_new_cmd() and
+ * transport_generic_process_write()
+ */
+static int transport_execute_tasks(struct se_cmd *cmd)
+{
+ int add_tasks;
+ struct se_device *se_dev = cmd->se_dev;
+ /*
+ * Call transport_cmd_check_stop() to see if a fabric exception
+ * has occurred that prevents execution.
+ */
+ if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) {
+ /*
+ * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE
+ * attribute for the tasks of the received struct se_cmd CDB
+ */
+ add_tasks = transport_execute_task_attr(cmd);
+ if (!add_tasks)
+ goto execute_tasks;
+ /*
+ * __transport_execute_tasks() -> __transport_add_tasks_from_cmd()
+ * adds associated se_tasks while holding dev->execute_task_lock
+ * before I/O dispath to avoid a double spinlock access.
+ */
+ __transport_execute_tasks(se_dev, cmd);
+ return 0;
+ }
+
+execute_tasks:
+ __transport_execute_tasks(se_dev, NULL);
+ return 0;
+}
+
+/*
+ * Called to check struct se_device tcq depth window, and once open pull struct se_task
+ * from struct se_device->execute_task_list and
+ *
+ * Called from transport_processing_thread()
+ */
+static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *new_cmd)
+{
+ int error;
+ struct se_cmd *cmd = NULL;
+ struct se_task *task = NULL;
+ unsigned long flags;
+
+check_depth:
+ spin_lock_irq(&dev->execute_task_lock);
+ if (new_cmd != NULL)
+ __transport_add_tasks_from_cmd(new_cmd);
+
+ if (list_empty(&dev->execute_task_list)) {
+ spin_unlock_irq(&dev->execute_task_lock);
+ return 0;
+ }
+ task = list_first_entry(&dev->execute_task_list,
+ struct se_task, t_execute_list);
+ __transport_remove_task_from_execute_queue(task, dev);
+ spin_unlock_irq(&dev->execute_task_lock);
+
+ cmd = task->task_se_cmd;
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ task->task_flags |= (TF_ACTIVE | TF_SENT);
+ atomic_inc(&cmd->t_task_cdbs_sent);
+
+ if (atomic_read(&cmd->t_task_cdbs_sent) ==
+ cmd->t_task_list_num)
+ cmd->transport_state |= CMD_T_SENT;
+
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ if (cmd->execute_task)
+ error = cmd->execute_task(task);
+ else
+ error = dev->transport->do_task(task);
+ if (error != 0) {
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ task->task_flags &= ~TF_ACTIVE;
+ cmd->transport_state &= ~CMD_T_SENT;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ transport_stop_tasks_for_cmd(cmd);
+ transport_generic_request_failure(cmd);
+ }
+
+ new_cmd = NULL;
+ goto check_depth;
+
+ return 0;
+}
+
+static inline u32 transport_get_sectors_6(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 8-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * Use 24-bit allocation length for TYPE_TAPE.
+ */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE)
+ return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4];
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 8-bit sector value. SBC-3 says:
+ *
+ * A TRANSFER LENGTH field set to zero specifies that 256
+ * logical blocks shall be written. Any other value
+ * specifies the number of logical blocks that shall be
+ * written.
+ */
+type_disk:
+ return cdb[4] ? : 256;
+}
+
+static inline u32 transport_get_sectors_10(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 16-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * XXX_10 is not defined in SSC, throw an exception
+ */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
+ *ret = -EINVAL;
+ return 0;
+ }
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 16-bit sector value.
+ */
+type_disk:
+ return (u32)(cdb[7] << 8) + cdb[8];
+}
+
+static inline u32 transport_get_sectors_12(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * XXX_12 is not defined in SSC, throw an exception
+ */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
+ *ret = -EINVAL;
+ return 0;
+ }
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 32-bit sector value.
+ */
+type_disk:
+ return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
+}
+
+static inline u32 transport_get_sectors_16(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * Use 24-bit allocation length for TYPE_TAPE.
+ */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE)
+ return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14];
+
+type_disk:
+ return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
+ (cdb[12] << 8) + cdb[13];
+}
+
+/*
+ * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants
+ */
+static inline u32 transport_get_sectors_32(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ return (u32)(cdb[28] << 24) + (cdb[29] << 16) +
+ (cdb[30] << 8) + cdb[31];
+
+}
+
+static inline u32 transport_get_size(
+ u32 sectors,
+ unsigned char *cdb,
+ struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
+ if (cdb[1] & 1) { /* sectors */
+ return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
+ } else /* bytes */
+ return sectors;
+ }
+#if 0
+ pr_debug("Returning block_size: %u, sectors: %u == %u for"
+ " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors,
+ dev->se_sub_dev->se_dev_attrib.block_size * sectors,
+ dev->transport->name);
+#endif
+ return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
+}
+
+static void transport_xor_callback(struct se_cmd *cmd)
+{
+ unsigned char *buf, *addr;
+ struct scatterlist *sg;
+ unsigned int offset;
+ int i;
+ int count;
+ /*
+ * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command
+ *
+ * 1) read the specified logical block(s);
+ * 2) transfer logical blocks from the data-out buffer;
+ * 3) XOR the logical blocks transferred from the data-out buffer with
+ * the logical blocks read, storing the resulting XOR data in a buffer;
+ * 4) if the DISABLE WRITE bit is set to zero, then write the logical
+ * blocks transferred from the data-out buffer; and
+ * 5) transfer the resulting XOR data to the data-in buffer.
+ */
+ buf = kmalloc(cmd->data_length, GFP_KERNEL);
+ if (!buf) {
+ pr_err("Unable to allocate xor_callback buf\n");
+ return;
+ }
+ /*
+ * Copy the scatterlist WRITE buffer located at cmd->t_data_sg
+ * into the locally allocated *buf
+ */
+ sg_copy_to_buffer(cmd->t_data_sg,
+ cmd->t_data_nents,
+ buf,
+ cmd->data_length);
+
+ /*
+ * Now perform the XOR against the BIDI read memory located at
+ * cmd->t_mem_bidi_list
+ */
+
+ offset = 0;
+ for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) {
+ addr = kmap_atomic(sg_page(sg));
+ if (!addr)
+ goto out;
+
+ for (i = 0; i < sg->length; i++)
+ *(addr + sg->offset + i) ^= *(buf + offset + i);
+
+ offset += sg->length;
+ kunmap_atomic(addr);
+ }
+
+out:
+ kfree(buf);
+}
+
+/*
+ * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd
+ */
+static int transport_get_sense_data(struct se_cmd *cmd)
+{
+ unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL;
+ struct se_device *dev = cmd->se_dev;
+ struct se_task *task = NULL, *task_tmp;
+ unsigned long flags;
+ u32 offset = 0;
+
+ WARN_ON(!cmd->se_lun);
+
+ if (!dev)
+ return 0;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return 0;
+ }
+
+ list_for_each_entry_safe(task, task_tmp,
+ &cmd->t_task_list, t_list) {
+ if (!(task->task_flags & TF_HAS_SENSE))
+ continue;
+
+ if (!dev->transport->get_sense_buffer) {
+ pr_err("dev->transport->get_sense_buffer"
+ " is NULL\n");
+ continue;
+ }
+
+ sense_buffer = dev->transport->get_sense_buffer(task);
+ if (!sense_buffer) {
+ pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate"
+ " sense buffer for task with sense\n",
+ cmd->se_tfo->get_task_tag(cmd), task);
+ continue;
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ offset = cmd->se_tfo->set_fabric_sense_len(cmd,
+ TRANSPORT_SENSE_BUFFER);
+
+ memcpy(&buffer[offset], sense_buffer,
+ TRANSPORT_SENSE_BUFFER);
+ cmd->scsi_status = task->task_scsi_status;
+ /* Automatically padded */
+ cmd->scsi_sense_length =
+ (TRANSPORT_SENSE_BUFFER + offset);
+
+ pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x"
+ " and sense\n",
+ dev->se_hba->hba_id, dev->transport->name,
+ cmd->scsi_status);
+ return 0;
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return -1;
+}
+
+static inline long long transport_dev_end_lba(struct se_device *dev)
+{
+ return dev->transport->get_blocks(dev) + 1;
+}
+
+static int transport_cmd_get_valid_sectors(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ u32 sectors;
+
+ if (dev->transport->get_device_type(dev) != TYPE_DISK)
+ return 0;
+
+ sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size);
+
+ if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) {
+ pr_err("LBA: %llu Sectors: %u exceeds"
+ " transport_dev_end_lba(): %llu\n",
+ cmd->t_task_lba, sectors,
+ transport_dev_end_lba(dev));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev)
+{
+ /*
+ * Determine if the received WRITE_SAME is used to for direct
+ * passthrough into Linux/SCSI with struct request via TCM/pSCSI
+ * or we are signaling the use of internal WRITE_SAME + UNMAP=1
+ * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code.
+ */
+ int passthrough = (dev->transport->transport_type ==
+ TRANSPORT_PLUGIN_PHBA_PDEV);
+
+ if (!passthrough) {
+ if ((flags[0] & 0x04) || (flags[0] & 0x02)) {
+ pr_err("WRITE_SAME PBDATA and LBDATA"
+ " bits not supported for Block Discard"
+ " Emulation\n");
+ return -ENOSYS;
+ }
+ /*
+ * Currently for the emulated case we only accept
+ * tpws with the UNMAP=1 bit set.
+ */
+ if (!(flags[0] & 0x08)) {
+ pr_err("WRITE_SAME w/o UNMAP bit not"
+ " supported for Block Discard Emulation\n");
+ return -ENOSYS;
+ }
+ }
+
+ return 0;
+}
+
+/* transport_generic_cmd_sequencer():
+ *
+ * Generic Command Sequencer that should work for most DAS transport
+ * drivers.
+ *
+ * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD
+ * RX Thread.
+ *
+ * FIXME: Need to support other SCSI OPCODES where as well.
+ */
+static int transport_generic_cmd_sequencer(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ int ret = 0, sector_ret = 0, passthrough;
+ u32 sectors = 0, size = 0, pr_reg_type = 0;
+ u16 service_action;
+ u8 alua_ascq = 0;
+ /*
+ * Check for an existing UNIT ATTENTION condition
+ */
+ if (core_scsi3_ua_check(cmd, cdb) < 0) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION;
+ return -EINVAL;
+ }
+ /*
+ * Check status of Asymmetric Logical Unit Assignment port
+ */
+ ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq);
+ if (ret != 0) {
+ /*
+ * Set SCSI additional sense code (ASC) to 'LUN Not Accessible';
+ * The ALUA additional sense code qualifier (ASCQ) is determined
+ * by the ALUA primary or secondary access state..
+ */
+ if (ret > 0) {
+#if 0
+ pr_debug("[%s]: ALUA TG Port not available,"
+ " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n",
+ cmd->se_tfo->get_fabric_name(), alua_ascq);
+#endif
+ transport_set_sense_codes(cmd, 0x04, alua_ascq);
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY;
+ return -EINVAL;
+ }
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Check status for SPC-3 Persistent Reservations
+ */
+ if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) {
+ if (su_dev->t10_pr.pr_ops.t10_seq_non_holder(
+ cmd, cdb, pr_reg_type) != 0) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT;
+ cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+ cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
+ return -EBUSY;
+ }
+ /*
+ * This means the CDB is allowed for the SCSI Initiator port
+ * when said port is *NOT* holding the legacy SPC-2 or
+ * SPC-3 Persistent Reservation.
+ */
+ }
+
+ /*
+ * If we operate in passthrough mode we skip most CDB emulation and
+ * instead hand the commands down to the physical SCSI device.
+ */
+ passthrough =
+ (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV);
+
+ switch (cdb[0]) {
+ case READ_6:
+ sectors = transport_get_sectors_6(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_21(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_10:
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_12:
+ sectors = transport_get_sectors_12(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_64(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_6:
+ sectors = transport_get_sectors_6(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_21(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_10:
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ if (cdb[1] & 0x8)
+ cmd->se_cmd_flags |= SCF_FUA;
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_12:
+ sectors = transport_get_sectors_12(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ if (cdb[1] & 0x8)
+ cmd->se_cmd_flags |= SCF_FUA;
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_64(cdb);
+ if (cdb[1] & 0x8)
+ cmd->se_cmd_flags |= SCF_FUA;
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case XDWRITEREAD_10:
+ if ((cmd->data_direction != DMA_TO_DEVICE) ||
+ !(cmd->se_cmd_flags & SCF_BIDI))
+ goto out_invalid_cdb_field;
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+
+ /*
+ * Do now allow BIDI commands for passthrough mode.
+ */
+ if (passthrough)
+ goto out_unsupported_cdb;
+
+ /*
+ * Setup BIDI XOR callback to be run after I/O completion.
+ */
+ cmd->transport_complete_callback = &transport_xor_callback;
+ if (cdb[1] & 0x8)
+ cmd->se_cmd_flags |= SCF_FUA;
+ break;
+ case VARIABLE_LENGTH_CMD:
+ service_action = get_unaligned_be16(&cdb[8]);
+ switch (service_action) {
+ case XDWRITEREAD_32:
+ sectors = transport_get_sectors_32(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ /*
+ * Use WRITE_32 and READ_32 opcodes for the emulated
+ * XDWRITE_READ_32 logic.
+ */
+ cmd->t_task_lba = transport_lba_64_ext(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+
+ /*
+ * Do now allow BIDI commands for passthrough mode.
+ */
+ if (passthrough)
+ goto out_unsupported_cdb;
+
+ /*
+ * Setup BIDI XOR callback to be run during after I/O
+ * completion.
+ */
+ cmd->transport_complete_callback = &transport_xor_callback;
+ if (cdb[1] & 0x8)
+ cmd->se_cmd_flags |= SCF_FUA;
+ break;
+ case WRITE_SAME_32:
+ sectors = transport_get_sectors_32(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+
+ if (sectors)
+ size = transport_get_size(1, cdb, cmd);
+ else {
+ pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
+ " supported\n");
+ goto out_invalid_cdb_field;
+ }
+
+ cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+
+ if (target_check_write_same_discard(&cdb[10], dev) < 0)
+ goto out_unsupported_cdb;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_write_same;
+ break;
+ default:
+ pr_err("VARIABLE_LENGTH_CMD service action"
+ " 0x%04x not supported\n", service_action);
+ goto out_unsupported_cdb;
+ }
+ break;
+ case MAINTENANCE_IN:
+ if (dev->transport->get_device_type(dev) != TYPE_ROM) {
+ /* MAINTENANCE_IN from SCC-2 */
+ /*
+ * Check for emulated MI_REPORT_TARGET_PGS.
+ */
+ if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS &&
+ su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+ cmd->execute_task =
+ target_emulate_report_target_port_groups;
+ }
+ size = (cdb[6] << 24) | (cdb[7] << 16) |
+ (cdb[8] << 8) | cdb[9];
+ } else {
+ /* GPCMD_SEND_KEY from multi media commands */
+ size = (cdb[8] << 8) + cdb[9];
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MODE_SELECT:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MODE_SELECT_10:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MODE_SENSE:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_modesense;
+ break;
+ case MODE_SENSE_10:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_modesense;
+ break;
+ case GPCMD_READ_BUFFER_CAPACITY:
+ case GPCMD_SEND_OPC:
+ case LOG_SELECT:
+ case LOG_SENSE:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case READ_BLOCK_LIMITS:
+ size = READ_BLOCK_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case GPCMD_GET_CONFIGURATION:
+ case GPCMD_READ_FORMAT_CAPACITIES:
+ case GPCMD_READ_DISC_INFO:
+ case GPCMD_READ_TRACK_RZONE_INFO:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case PERSISTENT_RESERVE_IN:
+ if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
+ cmd->execute_task = target_scsi3_emulate_pr_in;
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case PERSISTENT_RESERVE_OUT:
+ if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
+ cmd->execute_task = target_scsi3_emulate_pr_out;
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case GPCMD_MECHANISM_STATUS:
+ case GPCMD_READ_DVD_STRUCTURE:
+ size = (cdb[8] << 8) + cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case READ_POSITION:
+ size = READ_POSITION_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MAINTENANCE_OUT:
+ if (dev->transport->get_device_type(dev) != TYPE_ROM) {
+ /* MAINTENANCE_OUT from SCC-2
+ *
+ * Check for emulated MO_SET_TARGET_PGS.
+ */
+ if (cdb[1] == MO_SET_TARGET_PGS &&
+ su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+ cmd->execute_task =
+ target_emulate_set_target_port_groups;
+ }
+
+ size = (cdb[6] << 24) | (cdb[7] << 16) |
+ (cdb[8] << 8) | cdb[9];
+ } else {
+ /* GPCMD_REPORT_KEY from multi media commands */
+ size = (cdb[8] << 8) + cdb[9];
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case INQUIRY:
+ size = (cdb[3] << 8) + cdb[4];
+ /*
+ * Do implict HEAD_OF_QUEUE processing for INQUIRY.
+ * See spc4r17 section 5.3
+ */
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ cmd->sam_task_attr = MSG_HEAD_TAG;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_inquiry;
+ break;
+ case READ_BUFFER:
+ size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case READ_CAPACITY:
+ size = READ_CAP_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_readcapacity;
+ break;
+ case READ_MEDIA_SERIAL_NUMBER:
+ case SECURITY_PROTOCOL_IN:
+ case SECURITY_PROTOCOL_OUT:
+ size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case SERVICE_ACTION_IN:
+ switch (cmd->t_task_cdb[1] & 0x1f) {
+ case SAI_READ_CAPACITY_16:
+ if (!passthrough)
+ cmd->execute_task =
+ target_emulate_readcapacity_16;
+ break;
+ default:
+ if (passthrough)
+ break;
+
+ pr_err("Unsupported SA: 0x%02x\n",
+ cmd->t_task_cdb[1] & 0x1f);
+ goto out_invalid_cdb_field;
+ }
+ /*FALLTHROUGH*/
+ case ACCESS_CONTROL_IN:
+ case ACCESS_CONTROL_OUT:
+ case EXTENDED_COPY:
+ case READ_ATTRIBUTE:
+ case RECEIVE_COPY_RESULTS:
+ case WRITE_ATTRIBUTE:
+ size = (cdb[10] << 24) | (cdb[11] << 16) |
+ (cdb[12] << 8) | cdb[13];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case RECEIVE_DIAGNOSTIC:
+ case SEND_DIAGNOSTIC:
+ size = (cdb[3] << 8) | cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+/* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */
+#if 0
+ case GPCMD_READ_CD:
+ sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ size = (2336 * sectors);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+#endif
+ case READ_TOC:
+ size = cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case REQUEST_SENSE:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_request_sense;
+ break;
+ case READ_ELEMENT_STATUS:
+ size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case WRITE_BUFFER:
+ size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case RESERVE:
+ case RESERVE_10:
+ /*
+ * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
+ * Assume the passthrough or $FABRIC_MOD will tell us about it.
+ */
+ if (cdb[0] == RESERVE_10)
+ size = (cdb[7] << 8) | cdb[8];
+ else
+ size = cmd->data_length;
+
+ /*
+ * Setup the legacy emulated handler for SPC-2 and
+ * >= SPC-3 compatible reservation handling (CRH=1)
+ * Otherwise, we assume the underlying SCSI logic is
+ * is running in SPC_PASSTHROUGH, and wants reservations
+ * emulation disabled.
+ */
+ if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
+ cmd->execute_task = target_scsi2_reservation_reserve;
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case RELEASE:
+ case RELEASE_10:
+ /*
+ * The SPC-2 RELEASE does not contain a size in the SCSI CDB.
+ * Assume the passthrough or $FABRIC_MOD will tell us about it.
+ */
+ if (cdb[0] == RELEASE_10)
+ size = (cdb[7] << 8) | cdb[8];
+ else
+ size = cmd->data_length;
+
+ if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
+ cmd->execute_task = target_scsi2_reservation_release;
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case SYNCHRONIZE_CACHE:
+ case SYNCHRONIZE_CACHE_16:
+ /*
+ * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
+ */
+ if (cdb[0] == SYNCHRONIZE_CACHE) {
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ cmd->t_task_lba = transport_lba_32(cdb);
+ } else {
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ cmd->t_task_lba = transport_lba_64(cdb);
+ }
+ if (sector_ret)
+ goto out_unsupported_cdb;
+
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+
+ if (passthrough)
+ break;
+
+ /*
+ * Check to ensure that LBA + Range does not exceed past end of
+ * device for IBLOCK and FILEIO ->do_sync_cache() backend calls
+ */
+ if ((cmd->t_task_lba != 0) || (sectors != 0)) {
+ if (transport_cmd_get_valid_sectors(cmd) < 0)
+ goto out_invalid_cdb_field;
+ }
+ cmd->execute_task = target_emulate_synchronize_cache;
+ break;
+ case UNMAP:
+ size = get_unaligned_be16(&cdb[7]);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_unmap;
+ break;
+ case WRITE_SAME_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+
+ if (sectors)
+ size = transport_get_size(1, cdb, cmd);
+ else {
+ pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
+ goto out_invalid_cdb_field;
+ }
+
+ cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+
+ if (target_check_write_same_discard(&cdb[1], dev) < 0)
+ goto out_unsupported_cdb;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_write_same;
+ break;
+ case WRITE_SAME:
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+
+ if (sectors)
+ size = transport_get_size(1, cdb, cmd);
+ else {
+ pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
+ goto out_invalid_cdb_field;
+ }
+
+ cmd->t_task_lba = get_unaligned_be32(&cdb[2]);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ /*
+ * Follow sbcr26 with WRITE_SAME (10) and check for the existence
+ * of byte 1 bit 3 UNMAP instead of original reserved field
+ */
+ if (target_check_write_same_discard(&cdb[1], dev) < 0)
+ goto out_unsupported_cdb;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_write_same;
+ break;
+ case ALLOW_MEDIUM_REMOVAL:
+ case ERASE:
+ case REZERO_UNIT:
+ case SEEK_10:
+ case SPACE:
+ case START_STOP:
+ case TEST_UNIT_READY:
+ case VERIFY:
+ case WRITE_FILEMARKS:
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ if (!passthrough)
+ cmd->execute_task = target_emulate_noop;
+ break;
+ case GPCMD_CLOSE_TRACK:
+ case INITIALIZE_ELEMENT_STATUS:
+ case GPCMD_LOAD_UNLOAD:
+ case GPCMD_SET_SPEED:
+ case MOVE_MEDIUM:
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case REPORT_LUNS:
+ cmd->execute_task = target_report_luns;
+ size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ /*
+ * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS
+ * See spc4r17 section 5.3
+ */
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ cmd->sam_task_attr = MSG_HEAD_TAG;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ default:
+ pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
+ " 0x%02x, sending CHECK_CONDITION.\n",
+ cmd->se_tfo->get_fabric_name(), cdb[0]);
+ goto out_unsupported_cdb;
+ }
+
+ if (size != cmd->data_length) {
+ pr_warn("TARGET_CORE[%s]: Expected Transfer Length:"
+ " %u does not match SCSI CDB Length: %u for SAM Opcode:"
+ " 0x%02x\n", cmd->se_tfo->get_fabric_name(),
+ cmd->data_length, size, cdb[0]);
+
+ cmd->cmd_spdtl = size;
+
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ pr_err("Rejecting underflow/overflow"
+ " WRITE data\n");
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Reject READ_* or WRITE_* with overflow/underflow for
+ * type SCF_SCSI_DATA_SG_IO_CDB.
+ */
+ if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) {
+ pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
+ " CDB on non 512-byte sector setup subsystem"
+ " plugin: %s\n", dev->transport->name);
+ /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * For the overflow case keep the existing fabric provided
+ * ->data_length. Otherwise for the underflow case, reset
+ * ->data_length to the smaller SCSI expected data transfer
+ * length.
+ */
+ if (size > cmd->data_length) {
+ cmd->se_cmd_flags |= SCF_OVERFLOW_BIT;
+ cmd->residual_count = (size - cmd->data_length);
+ } else {
+ cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
+ cmd->residual_count = (cmd->data_length - size);
+ cmd->data_length = size;
+ }
+ }
+
+ if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB &&
+ sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
+ printk_ratelimited(KERN_ERR "SCSI OP %02xh with too big sectors %u\n",
+ cdb[0], sectors);
+ goto out_invalid_cdb_field;
+ }
+
+ /* reject any command that we don't have a handler for */
+ if (!(passthrough || cmd->execute_task ||
+ (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)))
+ goto out_unsupported_cdb;
+
+ transport_set_supported_SAM_opcode(cmd);
+ return ret;
+
+out_unsupported_cdb:
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -EINVAL;
+out_invalid_cdb_field:
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+}
+
+/*
+ * Called from I/O completion to determine which dormant/delayed
+ * and ordered cmds need to have their tasks added to the execution queue.
+ */
+static void transport_complete_task_attr(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_cmd *cmd_p, *cmd_tmp;
+ int new_active_tasks = 0;
+
+ if (cmd->sam_task_attr == MSG_SIMPLE_TAG) {
+ atomic_dec(&dev->simple_cmds);
+ smp_mb__after_atomic_dec();
+ dev->dev_cur_ordered_id++;
+ pr_debug("Incremented dev->dev_cur_ordered_id: %u for"
+ " SIMPLE: %u\n", dev->dev_cur_ordered_id,
+ cmd->se_ordered_id);
+ } else if (cmd->sam_task_attr == MSG_HEAD_TAG) {
+ dev->dev_cur_ordered_id++;
+ pr_debug("Incremented dev_cur_ordered_id: %u for"
+ " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,
+ cmd->se_ordered_id);
+ } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {
+ atomic_dec(&dev->dev_ordered_sync);
+ smp_mb__after_atomic_dec();
+
+ dev->dev_cur_ordered_id++;
+ pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:"
+ " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id);
+ }
+ /*
+ * Process all commands up to the last received
+ * ORDERED task attribute which requires another blocking
+ * boundary
+ */
+ spin_lock(&dev->delayed_cmd_lock);
+ list_for_each_entry_safe(cmd_p, cmd_tmp,
+ &dev->delayed_cmd_list, se_delayed_node) {
+
+ list_del(&cmd_p->se_delayed_node);
+ spin_unlock(&dev->delayed_cmd_lock);
+
+ pr_debug("Calling add_tasks() for"
+ " cmd_p: 0x%02x Task Attr: 0x%02x"
+ " Dormant -> Active, se_ordered_id: %u\n",
+ cmd_p->t_task_cdb[0],
+ cmd_p->sam_task_attr, cmd_p->se_ordered_id);
+
+ transport_add_tasks_from_cmd(cmd_p);
+ new_active_tasks++;
+
+ spin_lock(&dev->delayed_cmd_lock);
+ if (cmd_p->sam_task_attr == MSG_ORDERED_TAG)
+ break;
+ }
+ spin_unlock(&dev->delayed_cmd_lock);
+ /*
+ * If new tasks have become active, wake up the transport thread
+ * to do the processing of the Active tasks.
+ */
+ if (new_active_tasks != 0)
+ wake_up_interruptible(&dev->dev_queue_obj.thread_wq);
+}
+
+static void transport_complete_qf(struct se_cmd *cmd)
+{
+ int ret = 0;
+
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ transport_complete_task_attr(cmd);
+
+ if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
+ ret = cmd->se_tfo->queue_status(cmd);
+ goto out;
+ }
+
+ switch (cmd->data_direction) {
+ case DMA_FROM_DEVICE:
+ ret = cmd->se_tfo->queue_data_in(cmd);
+ break;
+ case DMA_TO_DEVICE:
+ if (cmd->t_bidi_data_sg) {
+ ret = cmd->se_tfo->queue_data_in(cmd);
+ if (ret < 0)
+ break;
+ }
+ /* Fall through for DMA_TO_DEVICE */
+ case DMA_NONE:
+ ret = cmd->se_tfo->queue_status(cmd);
+ break;
+ default:
+ break;
+ }
+
+out:
+ if (ret < 0) {
+ transport_handle_queue_full(cmd, cmd->se_dev);
+ return;
+ }
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop_to_fabric(cmd);
+}
+
+static void transport_handle_queue_full(
+ struct se_cmd *cmd,
+ struct se_device *dev)
+{
+ spin_lock_irq(&dev->qf_cmd_lock);
+ list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list);
+ atomic_inc(&dev->dev_qf_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_irq(&cmd->se_dev->qf_cmd_lock);
+
+ schedule_work(&cmd->se_dev->qf_work_queue);
+}
+
+static void target_complete_ok_work(struct work_struct *work)
+{
+ struct se_cmd *cmd = container_of(work, struct se_cmd, work);
+ int reason = 0, ret;
+
+ /*
+ * Check if we need to move delayed/dormant tasks from cmds on the
+ * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
+ * Attribute.
+ */
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ transport_complete_task_attr(cmd);
+ /*
+ * Check to schedule QUEUE_FULL work, or execute an existing
+ * cmd->transport_qf_callback()
+ */
+ if (atomic_read(&cmd->se_dev->dev_qf_count) != 0)
+ schedule_work(&cmd->se_dev->qf_work_queue);
+
+ /*
+ * Check if we need to retrieve a sense buffer from
+ * the struct se_cmd in question.
+ */
+ if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
+ if (transport_get_sense_data(cmd) < 0)
+ reason = TCM_NON_EXISTENT_LUN;
+
+ /*
+ * Only set when an struct se_task->task_scsi_status returned
+ * a non GOOD status.
+ */
+ if (cmd->scsi_status) {
+ ret = transport_send_check_condition_and_sense(
+ cmd, reason, 1);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop_to_fabric(cmd);
+ return;
+ }
+ }
+ /*
+ * Check for a callback, used by amongst other things
+ * XDWRITE_READ_10 emulation.
+ */
+ if (cmd->transport_complete_callback)
+ cmd->transport_complete_callback(cmd);
+
+ switch (cmd->data_direction) {
+ case DMA_FROM_DEVICE:
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (cmd->se_lun->lun_sep) {
+ cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+
+ ret = cmd->se_tfo->queue_data_in(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+ break;
+ case DMA_TO_DEVICE:
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (cmd->se_lun->lun_sep) {
+ cmd->se_lun->lun_sep->sep_stats.rx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ /*
+ * Check if we need to send READ payload for BIDI-COMMAND
+ */
+ if (cmd->t_bidi_data_sg) {
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (cmd->se_lun->lun_sep) {
+ cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ ret = cmd->se_tfo->queue_data_in(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+ break;
+ }
+ /* Fall through for DMA_TO_DEVICE */
+ case DMA_NONE:
+ ret = cmd->se_tfo->queue_status(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+ break;
+ default:
+ break;
+ }
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop_to_fabric(cmd);
+ return;
+
+queue_full:
+ pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p,"
+ " data_direction: %d\n", cmd, cmd->data_direction);
+ cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
+ transport_handle_queue_full(cmd, cmd->se_dev);
+}
+
+static void transport_free_dev_tasks(struct se_cmd *cmd)
+{
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+ LIST_HEAD(dispose_list);
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_for_each_entry_safe(task, task_tmp,
+ &cmd->t_task_list, t_list) {
+ if (!(task->task_flags & TF_ACTIVE))
+ list_move_tail(&task->t_list, &dispose_list);
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ while (!list_empty(&dispose_list)) {
+ task = list_first_entry(&dispose_list, struct se_task, t_list);
+
+ if (task->task_sg != cmd->t_data_sg &&
+ task->task_sg != cmd->t_bidi_data_sg)
+ kfree(task->task_sg);
+
+ list_del(&task->t_list);
+
+ cmd->se_dev->transport->free_task(task);
+ }
+}
+
+static inline void transport_free_sgl(struct scatterlist *sgl, int nents)
+{
+ struct scatterlist *sg;
+ int count;
+
+ for_each_sg(sgl, sg, nents, count)
+ __free_page(sg_page(sg));
+
+ kfree(sgl);
+}
+
+static inline void transport_free_pages(struct se_cmd *cmd)
+{
+ if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)
+ return;
+
+ transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents);
+ cmd->t_data_sg = NULL;
+ cmd->t_data_nents = 0;
+
+ transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
+ cmd->t_bidi_data_sg = NULL;
+ cmd->t_bidi_data_nents = 0;
+}
+
+/**
+ * transport_release_cmd - free a command
+ * @cmd: command to free
+ *
+ * This routine unconditionally frees a command, and reference counting
+ * or list removal must be done in the caller.
+ */
+static void transport_release_cmd(struct se_cmd *cmd)
+{
+ BUG_ON(!cmd->se_tfo);
+
+ if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
+ core_tmr_release_req(cmd->se_tmr_req);
+ if (cmd->t_task_cdb != cmd->__t_task_cdb)
+ kfree(cmd->t_task_cdb);
+ /*
+ * If this cmd has been setup with target_get_sess_cmd(), drop
+ * the kref and call ->release_cmd() in kref callback.
+ */
+ if (cmd->check_release != 0) {
+ target_put_sess_cmd(cmd->se_sess, cmd);
+ return;
+ }
+ cmd->se_tfo->release_cmd(cmd);
+}
+
+/**
+ * transport_put_cmd - release a reference to a command
+ * @cmd: command to release
+ *
+ * This routine releases our reference to the command and frees it if possible.
+ */
+static void transport_put_cmd(struct se_cmd *cmd)
+{
+ unsigned long flags;
+ int free_tasks = 0;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (atomic_read(&cmd->t_fe_count)) {
+ if (!atomic_dec_and_test(&cmd->t_fe_count))
+ goto out_busy;
+ }
+
+ if (atomic_read(&cmd->t_se_count)) {
+ if (!atomic_dec_and_test(&cmd->t_se_count))
+ goto out_busy;
+ }
+
+ if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
+ cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
+ transport_all_task_dev_remove_state(cmd);
+ free_tasks = 1;
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ if (free_tasks != 0)
+ transport_free_dev_tasks(cmd);
+
+ transport_free_pages(cmd);
+ transport_release_cmd(cmd);
+ return;
+out_busy:
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+}
+
+/*
+ * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of
+ * allocating in the core.
+ * @cmd: Associated se_cmd descriptor
+ * @mem: SGL style memory for TCM WRITE / READ
+ * @sg_mem_num: Number of SGL elements
+ * @mem_bidi_in: SGL style memory for TCM BIDI READ
+ * @sg_mem_bidi_num: Number of BIDI READ SGL elements
+ *
+ * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage
+ * of parameters.
+ */
+int transport_generic_map_mem_to_cmd(
+ struct se_cmd *cmd,
+ struct scatterlist *sgl,
+ u32 sgl_count,
+ struct scatterlist *sgl_bidi,
+ u32 sgl_bidi_count)
+{
+ if (!sgl || !sgl_count)
+ return 0;
+
+ if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) ||
+ (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) {
+ /*
+ * Reject SCSI data overflow with map_mem_to_cmd() as incoming
+ * scatterlists already have been set to follow what the fabric
+ * passes for the original expected data transfer length.
+ */
+ if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
+ pr_warn("Rejecting SCSI DATA overflow for fabric using"
+ " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -EINVAL;
+ }
+
+ cmd->t_data_sg = sgl;
+ cmd->t_data_nents = sgl_count;
+
+ if (sgl_bidi && sgl_bidi_count) {
+ cmd->t_bidi_data_sg = sgl_bidi;
+ cmd->t_bidi_data_nents = sgl_bidi_count;
+ }
+ cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_map_mem_to_cmd);
+
+void *transport_kmap_data_sg(struct se_cmd *cmd)
+{
+ struct scatterlist *sg = cmd->t_data_sg;
+ struct page **pages;
+ int i;
+
+ BUG_ON(!sg);
+ /*
+ * We need to take into account a possible offset here for fabrics like
+ * tcm_loop who may be using a contig buffer from the SCSI midlayer for
+ * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd()
+ */
+ if (!cmd->t_data_nents)
+ return NULL;
+ else if (cmd->t_data_nents == 1)
+ return kmap(sg_page(sg)) + sg->offset;
+
+ /* >1 page. use vmap */
+ pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL);
+ if (!pages)
+ return NULL;
+
+ /* convert sg[] to pages[] */
+ for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) {
+ pages[i] = sg_page(sg);
+ }
+
+ cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL);
+ kfree(pages);
+ if (!cmd->t_data_vmap)
+ return NULL;
+
+ return cmd->t_data_vmap + cmd->t_data_sg[0].offset;
+}
+EXPORT_SYMBOL(transport_kmap_data_sg);
+
+void transport_kunmap_data_sg(struct se_cmd *cmd)
+{
+ if (!cmd->t_data_nents) {
+ return;
+ } else if (cmd->t_data_nents == 1) {
+ kunmap(sg_page(cmd->t_data_sg));
+ return;
+ }
+
+ vunmap(cmd->t_data_vmap);
+ cmd->t_data_vmap = NULL;
+}
+EXPORT_SYMBOL(transport_kunmap_data_sg);
+
+static int
+transport_generic_get_mem(struct se_cmd *cmd)
+{
+ u32 length = cmd->data_length;
+ unsigned int nents;
+ struct page *page;
+ gfp_t zero_flag;
+ int i = 0;
+
+ nents = DIV_ROUND_UP(length, PAGE_SIZE);
+ cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL);
+ if (!cmd->t_data_sg)
+ return -ENOMEM;
+
+ cmd->t_data_nents = nents;
+ sg_init_table(cmd->t_data_sg, nents);
+
+ zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB ? 0 : __GFP_ZERO;
+
+ while (length) {
+ u32 page_len = min_t(u32, length, PAGE_SIZE);
+ page = alloc_page(GFP_KERNEL | zero_flag);
+ if (!page)
+ goto out;
+
+ sg_set_page(&cmd->t_data_sg[i], page, page_len, 0);
+ length -= page_len;
+ i++;
+ }
+ return 0;
+
+out:
+ while (i > 0) {
+ i--;
+ __free_page(sg_page(&cmd->t_data_sg[i]));
+ }
+ kfree(cmd->t_data_sg);
+ cmd->t_data_sg = NULL;
+ return -ENOMEM;
+}
+
+/* Reduce sectors if they are too long for the device */
+static inline sector_t transport_limit_task_sectors(
+ struct se_device *dev,
+ unsigned long long lba,
+ sector_t sectors)
+{
+ sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors);
+
+ if (dev->transport->get_device_type(dev) == TYPE_DISK)
+ if ((lba + sectors) > transport_dev_end_lba(dev))
+ sectors = ((transport_dev_end_lba(dev) - lba) + 1);
+
+ return sectors;
+}
+
+
+/*
+ * This function can be used by HW target mode drivers to create a linked
+ * scatterlist from all contiguously allocated struct se_task->task_sg[].
+ * This is intended to be called during the completion path by TCM Core
+ * when struct target_core_fabric_ops->check_task_sg_chaining is enabled.
+ */
+void transport_do_task_sg_chain(struct se_cmd *cmd)
+{
+ struct scatterlist *sg_first = NULL;
+ struct scatterlist *sg_prev = NULL;
+ int sg_prev_nents = 0;
+ struct scatterlist *sg;
+ struct se_task *task;
+ u32 chained_nents = 0;
+ int i;
+
+ BUG_ON(!cmd->se_tfo->task_sg_chaining);
+
+ /*
+ * Walk the struct se_task list and setup scatterlist chains
+ * for each contiguously allocated struct se_task->task_sg[].
+ */
+ list_for_each_entry(task, &cmd->t_task_list, t_list) {
+ if (!task->task_sg)
+ continue;
+
+ if (!sg_first) {
+ sg_first = task->task_sg;
+ chained_nents = task->task_sg_nents;
+ } else {
+ sg_chain(sg_prev, sg_prev_nents, task->task_sg);
+ chained_nents += task->task_sg_nents;
+ }
+ /*
+ * For the padded tasks, use the extra SGL vector allocated
+ * in transport_allocate_data_tasks() for the sg_prev_nents
+ * offset into sg_chain() above.
+ *
+ * We do not need the padding for the last task (or a single
+ * task), but in that case we will never use the sg_prev_nents
+ * value below which would be incorrect.
+ */
+ sg_prev_nents = (task->task_sg_nents + 1);
+ sg_prev = task->task_sg;
+ }
+ /*
+ * Setup the starting pointer and total t_tasks_sg_linked_no including
+ * padding SGs for linking and to mark the end.
+ */
+ cmd->t_tasks_sg_chained = sg_first;
+ cmd->t_tasks_sg_chained_no = chained_nents;
+
+ pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and"
+ " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained,
+ cmd->t_tasks_sg_chained_no);
+
+ for_each_sg(cmd->t_tasks_sg_chained, sg,
+ cmd->t_tasks_sg_chained_no, i) {
+
+ pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n",
+ i, sg, sg_page(sg), sg->length, sg->offset);
+ if (sg_is_chain(sg))
+ pr_debug("SG: %p sg_is_chain=1\n", sg);
+ if (sg_is_last(sg))
+ pr_debug("SG: %p sg_is_last=1\n", sg);
+ }
+}
+EXPORT_SYMBOL(transport_do_task_sg_chain);
+
+/*
+ * Break up cmd into chunks transport can handle
+ */
+static int
+transport_allocate_data_tasks(struct se_cmd *cmd,
+ enum dma_data_direction data_direction,
+ struct scatterlist *cmd_sg, unsigned int sgl_nents)
+{
+ struct se_device *dev = cmd->se_dev;
+ int task_count, i;
+ unsigned long long lba;
+ sector_t sectors, dev_max_sectors;
+ u32 sector_size;
+
+ if (transport_cmd_get_valid_sectors(cmd) < 0)
+ return -EINVAL;
+
+ dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors;
+ sector_size = dev->se_sub_dev->se_dev_attrib.block_size;
+
+ WARN_ON(cmd->data_length % sector_size);
+
+ lba = cmd->t_task_lba;
+ sectors = DIV_ROUND_UP(cmd->data_length, sector_size);
+ task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors);
+
+ /*
+ * If we need just a single task reuse the SG list in the command
+ * and avoid a lot of work.
+ */
+ if (task_count == 1) {
+ struct se_task *task;
+ unsigned long flags;
+
+ task = transport_generic_get_task(cmd, data_direction);
+ if (!task)
+ return -ENOMEM;
+
+ task->task_sg = cmd_sg;
+ task->task_sg_nents = sgl_nents;
+
+ task->task_lba = lba;
+ task->task_sectors = sectors;
+ task->task_size = task->task_sectors * sector_size;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_add_tail(&task->t_list, &cmd->t_task_list);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return task_count;
+ }
+
+ for (i = 0; i < task_count; i++) {
+ struct se_task *task;
+ unsigned int task_size, task_sg_nents_padded;
+ struct scatterlist *sg;
+ unsigned long flags;
+ int count;
+
+ task = transport_generic_get_task(cmd, data_direction);
+ if (!task)
+ return -ENOMEM;
+
+ task->task_lba = lba;
+ task->task_sectors = min(sectors, dev_max_sectors);
+ task->task_size = task->task_sectors * sector_size;
+
+ /*
+ * This now assumes that passed sg_ents are in PAGE_SIZE chunks
+ * in order to calculate the number per task SGL entries
+ */
+ task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE);
+ /*
+ * Check if the fabric module driver is requesting that all
+ * struct se_task->task_sg[] be chained together.. If so,
+ * then allocate an extra padding SG entry for linking and
+ * marking the end of the chained SGL for every task except
+ * the last one for (task_count > 1) operation, or skipping
+ * the extra padding for the (task_count == 1) case.
+ */
+ if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) {
+ task_sg_nents_padded = (task->task_sg_nents + 1);
+ } else
+ task_sg_nents_padded = task->task_sg_nents;
+
+ task->task_sg = kmalloc(sizeof(struct scatterlist) *
+ task_sg_nents_padded, GFP_KERNEL);
+ if (!task->task_sg) {
+ cmd->se_dev->transport->free_task(task);
+ return -ENOMEM;
+ }
+
+ sg_init_table(task->task_sg, task_sg_nents_padded);
+
+ task_size = task->task_size;
+
+ /* Build new sgl, only up to task_size */
+ for_each_sg(task->task_sg, sg, task->task_sg_nents, count) {
+ if (cmd_sg->length > task_size)
+ break;
+
+ *sg = *cmd_sg;
+ task_size -= cmd_sg->length;
+ cmd_sg = sg_next(cmd_sg);
+ }
+
+ lba += task->task_sectors;
+ sectors -= task->task_sectors;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_add_tail(&task->t_list, &cmd->t_task_list);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ }
+
+ return task_count;
+}
+
+static int
+transport_allocate_control_task(struct se_cmd *cmd)
+{
+ struct se_task *task;
+ unsigned long flags;
+
+ /* Workaround for handling zero-length control CDBs */
+ if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) &&
+ !cmd->data_length)
+ return 0;
+
+ task = transport_generic_get_task(cmd, cmd->data_direction);
+ if (!task)
+ return -ENOMEM;
+
+ task->task_sg = cmd->t_data_sg;
+ task->task_size = cmd->data_length;
+ task->task_sg_nents = cmd->t_data_nents;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ list_add_tail(&task->t_list, &cmd->t_task_list);
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ /* Success! Return number of tasks allocated */
+ return 1;
+}
+
+/*
+ * Allocate any required ressources to execute the command, and either place
+ * it on the execution queue if possible. For writes we might not have the
+ * payload yet, thus notify the fabric via a call to ->write_pending instead.
+ */
+int transport_generic_new_cmd(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ int task_cdbs, task_cdbs_bidi = 0;
+ int set_counts = 1;
+ int ret = 0;
+
+ /*
+ * Determine is the TCM fabric module has already allocated physical
+ * memory, and is directly calling transport_generic_map_mem_to_cmd()
+ * beforehand.
+ */
+ if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) &&
+ cmd->data_length) {
+ ret = transport_generic_get_mem(cmd);
+ if (ret < 0)
+ goto out_fail;
+ }
+
+ /*
+ * For BIDI command set up the read tasks first.
+ */
+ if (cmd->t_bidi_data_sg &&
+ dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
+ BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB));
+
+ task_cdbs_bidi = transport_allocate_data_tasks(cmd,
+ DMA_FROM_DEVICE, cmd->t_bidi_data_sg,
+ cmd->t_bidi_data_nents);
+ if (task_cdbs_bidi <= 0)
+ goto out_fail;
+
+ atomic_inc(&cmd->t_fe_count);
+ atomic_inc(&cmd->t_se_count);
+ set_counts = 0;
+ }
+
+ if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
+ task_cdbs = transport_allocate_data_tasks(cmd,
+ cmd->data_direction, cmd->t_data_sg,
+ cmd->t_data_nents);
+ } else {
+ task_cdbs = transport_allocate_control_task(cmd);
+ }
+
+ if (task_cdbs < 0)
+ goto out_fail;
+ else if (!task_cdbs && (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) {
+ spin_lock_irq(&cmd->t_state_lock);
+ cmd->t_state = TRANSPORT_COMPLETE;
+ cmd->transport_state |= CMD_T_ACTIVE;
+ spin_unlock_irq(&cmd->t_state_lock);
+
+ if (cmd->t_task_cdb[0] == REQUEST_SENSE) {
+ u8 ua_asc = 0, ua_ascq = 0;
+
+ core_scsi3_ua_clear_for_request_sense(cmd,
+ &ua_asc, &ua_ascq);
+ }
+
+ INIT_WORK(&cmd->work, target_complete_ok_work);
+ queue_work(target_completion_wq, &cmd->work);
+ return 0;
+ }
+
+ if (set_counts) {
+ atomic_inc(&cmd->t_fe_count);
+ atomic_inc(&cmd->t_se_count);
+ }
+
+ cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi);
+ atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num);
+ atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num);
+
+ /*
+ * For WRITEs, let the fabric know its buffer is ready..
+ * This WRITE struct se_cmd (and all of its associated struct se_task's)
+ * will be added to the struct se_device execution queue after its WRITE
+ * data has arrived. (ie: It gets handled by the transport processing
+ * thread a second time)
+ */
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ transport_add_tasks_to_state_queue(cmd);
+ return transport_generic_write_pending(cmd);
+ }
+ /*
+ * Everything else but a WRITE, add the struct se_cmd's struct se_task's
+ * to the execution queue.
+ */
+ transport_execute_tasks(cmd);
+ return 0;
+
+out_fail:
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -EINVAL;
+}
+EXPORT_SYMBOL(transport_generic_new_cmd);
+
+/* transport_generic_process_write():
+ *
+ *
+ */
+void transport_generic_process_write(struct se_cmd *cmd)
+{
+ transport_execute_tasks(cmd);
+}
+EXPORT_SYMBOL(transport_generic_process_write);
+
+static void transport_write_pending_qf(struct se_cmd *cmd)
+{
+ int ret;
+
+ ret = cmd->se_tfo->write_pending(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM) {
+ pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n",
+ cmd);
+ transport_handle_queue_full(cmd, cmd->se_dev);
+ }
+}
+
+static int transport_generic_write_pending(struct se_cmd *cmd)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ cmd->t_state = TRANSPORT_WRITE_PENDING;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ /*
+ * Clear the se_cmd for WRITE_PENDING status in order to set
+ * CMD_T_ACTIVE so that transport_generic_handle_data can be called
+ * from HW target mode interrupt code. This is safe to be called
+ * with transport_off=1 before the cmd->se_tfo->write_pending
+ * because the se_cmd->se_lun pointer is not being cleared.
+ */
+ transport_cmd_check_stop(cmd, 1, 0);
+
+ /*
+ * Call the fabric write_pending function here to let the
+ * frontend know that WRITE buffers are ready.
+ */
+ ret = cmd->se_tfo->write_pending(cmd);
+ if (ret == -EAGAIN || ret == -ENOMEM)
+ goto queue_full;
+ else if (ret < 0)
+ return ret;
+
+ return 1;
+
+queue_full:
+ pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);
+ cmd->t_state = TRANSPORT_COMPLETE_QF_WP;
+ transport_handle_queue_full(cmd, cmd->se_dev);
+ return 0;
+}
+
+void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
+{
+ if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) {
+ if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
+ transport_wait_for_tasks(cmd);
+
+ transport_release_cmd(cmd);
+ } else {
+ if (wait_for_tasks)
+ transport_wait_for_tasks(cmd);
+
+ core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd);
+
+ if (cmd->se_lun)
+ transport_lun_remove_cmd(cmd);
+
+ transport_free_dev_tasks(cmd);
+
+ transport_put_cmd(cmd);
+ }
+}
+EXPORT_SYMBOL(transport_generic_free_cmd);
+
+/* target_get_sess_cmd - Add command to active ->sess_cmd_list
+ * @se_sess: session to reference
+ * @se_cmd: command descriptor to add
+ * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd()
+ */
+void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd,
+ bool ack_kref)
+{
+ unsigned long flags;
+
+ kref_init(&se_cmd->cmd_kref);
+ /*
+ * Add a second kref if the fabric caller is expecting to handle
+ * fabric acknowledgement that requires two target_put_sess_cmd()
+ * invocations before se_cmd descriptor release.
+ */
+ if (ack_kref == true) {
+ kref_get(&se_cmd->cmd_kref);
+ se_cmd->se_cmd_flags |= SCF_ACK_KREF;
+ }
+
+ spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
+ list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
+ se_cmd->check_release = 1;
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+}
+EXPORT_SYMBOL(target_get_sess_cmd);
+
+static void target_release_cmd_kref(struct kref *kref)
+{
+ struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref);
+ struct se_session *se_sess = se_cmd->se_sess;
+ unsigned long flags;
+
+ spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
+ if (list_empty(&se_cmd->se_cmd_list)) {
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+ se_cmd->se_tfo->release_cmd(se_cmd);
+ return;
+ }
+ if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+ complete(&se_cmd->cmd_wait_comp);
+ return;
+ }
+ list_del(&se_cmd->se_cmd_list);
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+
+ se_cmd->se_tfo->release_cmd(se_cmd);
+}
+
+/* target_put_sess_cmd - Check for active I/O shutdown via kref_put
+ * @se_sess: session to reference
+ * @se_cmd: command descriptor to drop
+ */
+int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
+{
+ return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref);
+}
+EXPORT_SYMBOL(target_put_sess_cmd);
+
+/* target_splice_sess_cmd_list - Split active cmds into sess_wait_list
+ * @se_sess: session to split
+ */
+void target_splice_sess_cmd_list(struct se_session *se_sess)
+{
+ struct se_cmd *se_cmd;
+ unsigned long flags;
+
+ WARN_ON(!list_empty(&se_sess->sess_wait_list));
+ INIT_LIST_HEAD(&se_sess->sess_wait_list);
+
+ spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
+ se_sess->sess_tearing_down = 1;
+
+ list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list);
+
+ list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list)
+ se_cmd->cmd_wait_set = 1;
+
+ spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+}
+EXPORT_SYMBOL(target_splice_sess_cmd_list);
+
+/* target_wait_for_sess_cmds - Wait for outstanding descriptors
+ * @se_sess: session to wait for active I/O
+ * @wait_for_tasks: Make extra transport_wait_for_tasks call
+ */
+void target_wait_for_sess_cmds(
+ struct se_session *se_sess,
+ int wait_for_tasks)
+{
+ struct se_cmd *se_cmd, *tmp_cmd;
+ bool rc = false;
+
+ list_for_each_entry_safe(se_cmd, tmp_cmd,
+ &se_sess->sess_wait_list, se_cmd_list) {
+ list_del(&se_cmd->se_cmd_list);
+
+ pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
+ " %d\n", se_cmd, se_cmd->t_state,
+ se_cmd->se_tfo->get_cmd_state(se_cmd));
+
+ if (wait_for_tasks) {
+ pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d,"
+ " fabric state: %d\n", se_cmd, se_cmd->t_state,
+ se_cmd->se_tfo->get_cmd_state(se_cmd));
+
+ rc = transport_wait_for_tasks(se_cmd);
+
+ pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d,"
+ " fabric state: %d\n", se_cmd, se_cmd->t_state,
+ se_cmd->se_tfo->get_cmd_state(se_cmd));
+ }
+
+ if (!rc) {
+ wait_for_completion(&se_cmd->cmd_wait_comp);
+ pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
+ " fabric state: %d\n", se_cmd, se_cmd->t_state,
+ se_cmd->se_tfo->get_cmd_state(se_cmd));
+ }
+
+ se_cmd->se_tfo->release_cmd(se_cmd);
+ }
+}
+EXPORT_SYMBOL(target_wait_for_sess_cmds);
+
+/* transport_lun_wait_for_tasks():
+ *
+ * Called from ConfigFS context to stop the passed struct se_cmd to allow
+ * an struct se_lun to be successfully shutdown.
+ */
+static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun)
+{
+ unsigned long flags;
+ int ret;
+ /*
+ * If the frontend has already requested this struct se_cmd to
+ * be stopped, we can safely ignore this struct se_cmd.
+ */
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (cmd->transport_state & CMD_T_STOP) {
+ cmd->transport_state &= ~CMD_T_LUN_STOP;
+
+ pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n",
+ cmd->se_tfo->get_task_tag(cmd));
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ transport_cmd_check_stop(cmd, 1, 0);
+ return -EPERM;
+ }
+ cmd->transport_state |= CMD_T_LUN_FE_STOP;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq);
+
+ ret = transport_stop_tasks_for_cmd(cmd);
+
+ pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:"
+ " %d\n", cmd, cmd->t_task_list_num, ret);
+ if (!ret) {
+ pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n",
+ cmd->se_tfo->get_task_tag(cmd));
+ wait_for_completion(&cmd->transport_lun_stop_comp);
+ pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n",
+ cmd->se_tfo->get_task_tag(cmd));
+ }
+ transport_remove_cmd_from_queue(cmd);
+
+ return 0;
+}
+
+static void __transport_clear_lun_from_sessions(struct se_lun *lun)
+{
+ struct se_cmd *cmd = NULL;
+ unsigned long lun_flags, cmd_flags;
+ /*
+ * Do exception processing and return CHECK_CONDITION status to the
+ * Initiator Port.
+ */
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ while (!list_empty(&lun->lun_cmd_list)) {
+ cmd = list_first_entry(&lun->lun_cmd_list,
+ struct se_cmd, se_lun_node);
+ list_del_init(&cmd->se_lun_node);
+
+ /*
+ * This will notify iscsi_target_transport.c:
+ * transport_cmd_check_stop() that a LUN shutdown is in
+ * progress for the iscsi_cmd_t.
+ */
+ spin_lock(&cmd->t_state_lock);
+ pr_debug("SE_LUN[%d] - Setting cmd->transport"
+ "_lun_stop for ITT: 0x%08x\n",
+ cmd->se_lun->unpacked_lun,
+ cmd->se_tfo->get_task_tag(cmd));
+ cmd->transport_state |= CMD_T_LUN_STOP;
+ spin_unlock(&cmd->t_state_lock);
+
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
+
+ if (!cmd->se_lun) {
+ pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n",
+ cmd->se_tfo->get_task_tag(cmd),
+ cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
+ BUG();
+ }
+ /*
+ * If the Storage engine still owns the iscsi_cmd_t, determine
+ * and/or stop its context.
+ */
+ pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport"
+ "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun,
+ cmd->se_tfo->get_task_tag(cmd));
+
+ if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) {
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ continue;
+ }
+
+ pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun"
+ "_wait_for_tasks(): SUCCESS\n",
+ cmd->se_lun->unpacked_lun,
+ cmd->se_tfo->get_task_tag(cmd));
+
+ spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
+ if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
+ goto check_cond;
+ }
+ cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
+
+ transport_free_dev_tasks(cmd);
+ /*
+ * The Storage engine stopped this struct se_cmd before it was
+ * send to the fabric frontend for delivery back to the
+ * Initiator Node. Return this SCSI CDB back with an
+ * CHECK_CONDITION status.
+ */
+check_cond:
+ transport_send_check_condition_and_sense(cmd,
+ TCM_NON_EXISTENT_LUN, 0);
+ /*
+ * If the fabric frontend is waiting for this iscsi_cmd_t to
+ * be released, notify the waiting thread now that LU has
+ * finished accessing it.
+ */
+ spin_lock_irqsave(&cmd->t_state_lock, cmd_flags);
+ if (cmd->transport_state & CMD_T_LUN_FE_STOP) {
+ pr_debug("SE_LUN[%d] - Detected FE stop for"
+ " struct se_cmd: %p ITT: 0x%08x\n",
+ lun->unpacked_lun,
+ cmd, cmd->se_tfo->get_task_tag(cmd));
+
+ spin_unlock_irqrestore(&cmd->t_state_lock,
+ cmd_flags);
+ transport_cmd_check_stop(cmd, 1, 0);
+ complete(&cmd->transport_lun_fe_stop_comp);
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ continue;
+ }
+ pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n",
+ lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd));
+
+ spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ }
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
+}
+
+static int transport_clear_lun_thread(void *p)
+{
+ struct se_lun *lun = p;
+
+ __transport_clear_lun_from_sessions(lun);
+ complete(&lun->lun_shutdown_comp);
+
+ return 0;
+}
+
+int transport_clear_lun_from_sessions(struct se_lun *lun)
+{
+ struct task_struct *kt;
+
+ kt = kthread_run(transport_clear_lun_thread, lun,
+ "tcm_cl_%u", lun->unpacked_lun);
+ if (IS_ERR(kt)) {
+ pr_err("Unable to start clear_lun thread\n");
+ return PTR_ERR(kt);
+ }
+ wait_for_completion(&lun->lun_shutdown_comp);
+
+ return 0;
+}
+
+/**
+ * transport_wait_for_tasks - wait for completion to occur
+ * @cmd: command to wait
+ *
+ * Called from frontend fabric context to wait for storage engine
+ * to pause and/or release frontend generated struct se_cmd.
+ */
+bool transport_wait_for_tasks(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) &&
+ !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return false;
+ }
+ /*
+ * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE
+ * has been set in transport_set_supported_SAM_opcode().
+ */
+ if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) &&
+ !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return false;
+ }
+ /*
+ * If we are already stopped due to an external event (ie: LUN shutdown)
+ * sleep until the connection can have the passed struct se_cmd back.
+ * The cmd->transport_lun_stopped_sem will be upped by
+ * transport_clear_lun_from_sessions() once the ConfigFS context caller
+ * has completed its operation on the struct se_cmd.
+ */
+ if (cmd->transport_state & CMD_T_LUN_STOP) {
+ pr_debug("wait_for_tasks: Stopping"
+ " wait_for_completion(&cmd->t_tasktransport_lun_fe"
+ "_stop_comp); for ITT: 0x%08x\n",
+ cmd->se_tfo->get_task_tag(cmd));
+ /*
+ * There is a special case for WRITES where a FE exception +
+ * LUN shutdown means ConfigFS context is still sleeping on
+ * transport_lun_stop_comp in transport_lun_wait_for_tasks().
+ * We go ahead and up transport_lun_stop_comp just to be sure
+ * here.
+ */
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ complete(&cmd->transport_lun_stop_comp);
+ wait_for_completion(&cmd->transport_lun_fe_stop_comp);
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+
+ transport_all_task_dev_remove_state(cmd);
+ /*
+ * At this point, the frontend who was the originator of this
+ * struct se_cmd, now owns the structure and can be released through
+ * normal means below.
+ */
+ pr_debug("wait_for_tasks: Stopped"
+ " wait_for_completion(&cmd->t_tasktransport_lun_fe_"
+ "stop_comp); for ITT: 0x%08x\n",
+ cmd->se_tfo->get_task_tag(cmd));
+
+ cmd->transport_state &= ~CMD_T_LUN_STOP;
+ }
+
+ if (!(cmd->transport_state & CMD_T_ACTIVE)) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return false;
+ }
+
+ cmd->transport_state |= CMD_T_STOP;
+
+ pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
+ " i_state: %d, t_state: %d, CMD_T_STOP\n",
+ cmd, cmd->se_tfo->get_task_tag(cmd),
+ cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
+
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq);
+
+ wait_for_completion(&cmd->t_transport_stop_comp);
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP);
+
+ pr_debug("wait_for_tasks: Stopped wait_for_compltion("
+ "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n",
+ cmd->se_tfo->get_task_tag(cmd));
+
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ return true;
+}
+EXPORT_SYMBOL(transport_wait_for_tasks);
+
+static int transport_get_sense_codes(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ *asc = cmd->scsi_asc;
+ *ascq = cmd->scsi_ascq;
+
+ return 0;
+}
+
+static int transport_set_sense_codes(
+ struct se_cmd *cmd,
+ u8 asc,
+ u8 ascq)
+{
+ cmd->scsi_asc = asc;
+ cmd->scsi_ascq = ascq;
+
+ return 0;
+}
+
+int transport_send_check_condition_and_sense(
+ struct se_cmd *cmd,
+ u8 reason,
+ int from_transport)
+{
+ unsigned char *buffer = cmd->sense_buffer;
+ unsigned long flags;
+ int offset;
+ u8 asc = 0, ascq = 0;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return 0;
+ }
+ cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION;
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ if (!reason && from_transport)
+ goto after_reason;
+
+ if (!from_transport)
+ cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
+ /*
+ * Data Segment and SenseLength of the fabric response PDU.
+ *
+ * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE
+ * from include/scsi/scsi_cmnd.h
+ */
+ offset = cmd->se_tfo->set_fabric_sense_len(cmd,
+ TRANSPORT_SENSE_BUFFER);
+ /*
+ * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
+ * SENSE KEY values from include/scsi/scsi.h
+ */
+ switch (reason) {
+ case TCM_NON_EXISTENT_LUN:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* LOGICAL UNIT NOT SUPPORTED */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25;
+ break;
+ case TCM_UNSUPPORTED_SCSI_OPCODE:
+ case TCM_SECTOR_COUNT_TOO_MANY:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID COMMAND OPERATION CODE */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20;
+ break;
+ case TCM_UNKNOWN_MODE_PAGE:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID FIELD IN CDB */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ break;
+ case TCM_CHECK_CONDITION_ABORT_CMD:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* BUS DEVICE RESET FUNCTION OCCURRED */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03;
+ break;
+ case TCM_INCORRECT_AMOUNT_OF_DATA:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* WRITE ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ /* NOT ENOUGH UNSOLICITED DATA */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d;
+ break;
+ case TCM_INVALID_CDB_FIELD:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID FIELD IN CDB */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ break;
+ case TCM_INVALID_PARAMETER_LIST:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID FIELD IN PARAMETER LIST */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26;
+ break;
+ case TCM_UNEXPECTED_UNSOLICITED_DATA:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* WRITE ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ /* UNEXPECTED_UNSOLICITED_DATA */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c;
+ break;
+ case TCM_SERVICE_CRC_ERROR:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* PROTOCOL SERVICE CRC ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47;
+ /* N/A */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05;
+ break;
+ case TCM_SNACK_REJECTED:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* READ ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11;
+ /* FAILED RETRANSMISSION REQUEST */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13;
+ break;
+ case TCM_WRITE_PROTECTED:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* DATA PROTECT */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
+ /* WRITE PROTECTED */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27;
+ break;
+ case TCM_ADDRESS_OUT_OF_RANGE:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* LOGICAL BLOCK ADDRESS OUT OF RANGE */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x21;
+ break;
+ case TCM_CHECK_CONDITION_UNIT_ATTENTION:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* UNIT ATTENTION */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+ core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
+ buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ break;
+ case TCM_CHECK_CONDITION_NOT_READY:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* Not Ready */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY;
+ transport_get_sense_codes(cmd, &asc, &ascq);
+ buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ break;
+ case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
+ default:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* LOGICAL UNIT COMMUNICATION FAILURE */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x08;
+ break;
+ }
+ /*
+ * This code uses linux/include/scsi/scsi.h SAM status codes!
+ */
+ cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
+ /*
+ * Automatically padded, this value is encoded in the fabric's
+ * data_length response PDU containing the SCSI defined sense data.
+ */
+ cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
+
+after_reason:
+ return cmd->se_tfo->queue_status(cmd);
+}
+EXPORT_SYMBOL(transport_send_check_condition_and_sense);
+
+int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
+{
+ int ret = 0;
+
+ if (cmd->transport_state & CMD_T_ABORTED) {
+ if (!send_status ||
+ (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
+ return 1;
+#if 0
+ pr_debug("Sending delayed SAM_STAT_TASK_ABORTED"
+ " status for CDB: 0x%02x ITT: 0x%08x\n",
+ cmd->t_task_cdb[0],
+ cmd->se_tfo->get_task_tag(cmd));
+#endif
+ cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS;
+ cmd->se_tfo->queue_status(cmd);
+ ret = 1;
+ }
+ return ret;
+}
+EXPORT_SYMBOL(transport_check_aborted_status);
+
+void transport_send_task_abort(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd->t_state_lock, flags);
+ if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+
+ /*
+ * If there are still expected incoming fabric WRITEs, we wait
+ * until until they have completed before sending a TASK_ABORTED
+ * response. This response with TASK_ABORTED status will be
+ * queued back to fabric module by transport_check_aborted_status().
+ */
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ if (cmd->se_tfo->write_pending_status(cmd) != 0) {
+ cmd->transport_state |= CMD_T_ABORTED;
+ smp_mb__after_atomic_inc();
+ }
+ }
+ cmd->scsi_status = SAM_STAT_TASK_ABORTED;
+#if 0
+ pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
+ " ITT: 0x%08x\n", cmd->t_task_cdb[0],
+ cmd->se_tfo->get_task_tag(cmd));
+#endif
+ cmd->se_tfo->queue_status(cmd);
+}
+
+static int transport_generic_do_tmr(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_tmr_req *tmr = cmd->se_tmr_req;
+ int ret;
+
+ switch (tmr->function) {
+ case TMR_ABORT_TASK:
+ core_tmr_abort_task(dev, tmr, cmd->se_sess);
+ break;
+ case TMR_ABORT_TASK_SET:
+ case TMR_CLEAR_ACA:
+ case TMR_CLEAR_TASK_SET:
+ tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
+ break;
+ case TMR_LUN_RESET:
+ ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
+ tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
+ TMR_FUNCTION_REJECTED;
+ break;
+ case TMR_TARGET_WARM_RESET:
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ case TMR_TARGET_COLD_RESET:
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ default:
+ pr_err("Uknown TMR function: 0x%02x.\n",
+ tmr->function);
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ }
+
+ cmd->t_state = TRANSPORT_ISTATE_PROCESSING;
+ cmd->se_tfo->queue_tm_rsp(cmd);
+
+ transport_cmd_check_stop_to_fabric(cmd);
+ return 0;
+}
+
+/* transport_processing_thread():
+ *
+ *
+ */
+static int transport_processing_thread(void *param)
+{
+ int ret;
+ struct se_cmd *cmd;
+ struct se_device *dev = param;
+
+ while (!kthread_should_stop()) {
+ ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq,
+ atomic_read(&dev->dev_queue_obj.queue_cnt) ||
+ kthread_should_stop());
+ if (ret < 0)
+ goto out;
+
+get_cmd:
+ cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj);
+ if (!cmd)
+ continue;
+
+ switch (cmd->t_state) {
+ case TRANSPORT_NEW_CMD:
+ BUG();
+ break;
+ case TRANSPORT_NEW_CMD_MAP:
+ if (!cmd->se_tfo->new_cmd_map) {
+ pr_err("cmd->se_tfo->new_cmd_map is"
+ " NULL for TRANSPORT_NEW_CMD_MAP\n");
+ BUG();
+ }
+ ret = cmd->se_tfo->new_cmd_map(cmd);
+ if (ret < 0) {
+ transport_generic_request_failure(cmd);
+ break;
+ }
+ ret = transport_generic_new_cmd(cmd);
+ if (ret < 0) {
+ transport_generic_request_failure(cmd);
+ break;
+ }
+ break;
+ case TRANSPORT_PROCESS_WRITE:
+ transport_generic_process_write(cmd);
+ break;
+ case TRANSPORT_PROCESS_TMR:
+ transport_generic_do_tmr(cmd);
+ break;
+ case TRANSPORT_COMPLETE_QF_WP:
+ transport_write_pending_qf(cmd);
+ break;
+ case TRANSPORT_COMPLETE_QF_OK:
+ transport_complete_qf(cmd);
+ break;
+ default:
+ pr_err("Unknown t_state: %d for ITT: 0x%08x "
+ "i_state: %d on SE LUN: %u\n",
+ cmd->t_state,
+ cmd->se_tfo->get_task_tag(cmd),
+ cmd->se_tfo->get_cmd_state(cmd),
+ cmd->se_lun->unpacked_lun);
+ BUG();
+ }
+
+ goto get_cmd;
+ }
+
+out:
+ WARN_ON(!list_empty(&dev->state_task_list));
+ WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list));
+ dev->process_thread = NULL;
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.c b/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.c
new file mode 100644
index 0000000..6666a0c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.c
@@ -0,0 +1,329 @@
+/*******************************************************************************
+ * Filename: target_core_ua.c
+ *
+ * This file contains logic for SPC-3 Unit Attention emulation
+ *
+ * Copyright (c) 2009,2010 Rising Tide Systems
+ * Copyright (c) 2009,2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+int core_scsi3_ua_check(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+
+ if (!sess)
+ return 0;
+
+ nacl = sess->se_node_acl;
+ if (!nacl)
+ return 0;
+
+ deve = nacl->device_list[cmd->orig_fe_lun];
+ if (!atomic_read(&deve->ua_count))
+ return 0;
+ /*
+ * From sam4r14, section 5.14 Unit attention condition:
+ *
+ * a) if an INQUIRY command enters the enabled command state, the
+ * device server shall process the INQUIRY command and shall neither
+ * report nor clear any unit attention condition;
+ * b) if a REPORT LUNS command enters the enabled command state, the
+ * device server shall process the REPORT LUNS command and shall not
+ * report any unit attention condition;
+ * e) if a REQUEST SENSE command enters the enabled command state while
+ * a unit attention condition exists for the SCSI initiator port
+ * associated with the I_T nexus on which the REQUEST SENSE command
+ * was received, then the device server shall process the command
+ * and either:
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ case REQUEST_SENSE:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+int core_scsi3_ua_allocate(
+ struct se_node_acl *nacl,
+ u32 unpacked_lun,
+ u8 asc,
+ u8 ascq)
+{
+ struct se_dev_entry *deve;
+ struct se_ua *ua, *ua_p, *ua_tmp;
+ /*
+ * PASSTHROUGH OPS
+ */
+ if (!nacl)
+ return -EINVAL;
+
+ ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
+ if (!ua) {
+ pr_err("Unable to allocate struct se_ua\n");
+ return -ENOMEM;
+ }
+ INIT_LIST_HEAD(&ua->ua_dev_list);
+ INIT_LIST_HEAD(&ua->ua_nacl_list);
+
+ ua->ua_nacl = nacl;
+ ua->ua_asc = asc;
+ ua->ua_ascq = ascq;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[unpacked_lun];
+
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
+ /*
+ * Do not report the same UNIT ATTENTION twice..
+ */
+ if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+ kmem_cache_free(se_ua_cache, ua);
+ return 0;
+ }
+ /*
+ * Attach the highest priority Unit Attention to
+ * the head of the list following sam4r14,
+ * Section 5.14 Unit Attention Condition:
+ *
+ * POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest
+ * POWER ON OCCURRED or
+ * DEVICE INTERNAL RESET
+ * SCSI BUS RESET OCCURRED or
+ * MICROCODE HAS BEEN CHANGED or
+ * protocol specific
+ * BUS DEVICE RESET FUNCTION OCCURRED
+ * I_T NEXUS LOSS OCCURRED
+ * COMMANDS CLEARED BY POWER LOSS NOTIFICATION
+ * all others Lowest
+ *
+ * Each of the ASCQ codes listed above are defined in
+ * the 29h ASC family, see spc4r17 Table D.1
+ */
+ if (ua_p->ua_asc == 0x29) {
+ if ((asc == 0x29) && (ascq > ua_p->ua_ascq))
+ list_add(&ua->ua_nacl_list,
+ &deve->ua_list);
+ else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ } else if (ua_p->ua_asc == 0x2a) {
+ /*
+ * Incoming Family 29h ASCQ codes will override
+ * Family 2AHh ASCQ codes for Unit Attention condition.
+ */
+ if ((asc == 0x29) || (ascq > ua_p->ua_asc))
+ list_add(&ua->ua_nacl_list,
+ &deve->ua_list);
+ else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ } else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ atomic_inc(&deve->ua_count);
+ smp_mb__after_atomic_inc();
+ return 0;
+ }
+ list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ pr_debug("[%s]: Allocated UNIT ATTENTION, mapped LUN: %u, ASC:"
+ " 0x%02x, ASCQ: 0x%02x\n",
+ nacl->se_tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ asc, ascq);
+
+ atomic_inc(&deve->ua_count);
+ smp_mb__after_atomic_inc();
+ return 0;
+}
+
+void core_scsi3_ua_release_all(
+ struct se_dev_entry *deve)
+{
+ struct se_ua *ua, *ua_p;
+
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+}
+
+void core_scsi3_ua_for_check_condition(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+ struct se_ua *ua = NULL, *ua_p;
+ int head = 1;
+
+ if (!sess)
+ return;
+
+ nacl = sess->se_node_acl;
+ if (!nacl)
+ return;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[cmd->orig_fe_lun];
+ if (!atomic_read(&deve->ua_count)) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return;
+ }
+ /*
+ * The highest priority Unit Attentions are placed at the head of the
+ * struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION +
+ * sense data for the received CDB.
+ */
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ /*
+ * For ua_intlck_ctrl code not equal to 00b, only report the
+ * highest priority UNIT_ATTENTION and ASC/ASCQ without
+ * clearing it.
+ */
+ if (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ break;
+ }
+ /*
+ * Otherwise for the default 00b, release the UNIT ATTENTION
+ * condition. Return the ASC/ASCQ of the highest priority UA
+ * (head of the list) in the outgoing CHECK_CONDITION + sense.
+ */
+ if (head) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ head = 0;
+ }
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ pr_debug("[%s]: %s UNIT ATTENTION condition with"
+ " INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x"
+ " reported ASC: 0x%02x, ASCQ: 0x%02x\n",
+ nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
+ "Releasing", dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl,
+ cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq);
+}
+
+int core_scsi3_ua_clear_for_request_sense(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+ struct se_ua *ua = NULL, *ua_p;
+ int head = 1;
+
+ if (!sess)
+ return -EINVAL;
+
+ nacl = sess->se_node_acl;
+ if (!nacl)
+ return -EINVAL;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = nacl->device_list[cmd->orig_fe_lun];
+ if (!atomic_read(&deve->ua_count)) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -EPERM;
+ }
+ /*
+ * The highest priority Unit Attentions are placed at the head of the
+ * struct se_dev_entry->ua_list. The First (and hence highest priority)
+ * ASC/ASCQ will be returned in REQUEST_SENSE payload data for the
+ * matching struct se_lun.
+ *
+ * Once the returning ASC/ASCQ values are set, we go ahead and
+ * release all of the Unit Attention conditions for the associated
+ * struct se_lun.
+ */
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ if (head) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ head = 0;
+ }
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ pr_debug("[%s]: Released UNIT ATTENTION condition, mapped"
+ " LUN: %u, got REQUEST_SENSE reported ASC: 0x%02x,"
+ " ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ cmd->orig_fe_lun, *asc, *ascq);
+
+ return (head) ? -EPERM : 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.h b/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.h
new file mode 100644
index 0000000..6e6b034
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/target_core_ua.h
@@ -0,0 +1,36 @@
+#ifndef TARGET_CORE_UA_H
+
+/*
+ * From spc4r17, Table D.1: ASC and ASCQ Assignement
+ */
+#define ASCQ_29H_POWER_ON_RESET_OR_BUS_DEVICE_RESET_OCCURED 0x00
+#define ASCQ_29H_POWER_ON_OCCURRED 0x01
+#define ASCQ_29H_SCSI_BUS_RESET_OCCURED 0x02
+#define ASCQ_29H_BUS_DEVICE_RESET_FUNCTION_OCCURRED 0x03
+#define ASCQ_29H_DEVICE_INTERNAL_RESET 0x04
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_SINGLE_ENDED 0x05
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_LVD 0x06
+#define ASCQ_29H_NEXUS_LOSS_OCCURRED 0x07
+
+#define ASCQ_2AH_PARAMETERS_CHANGED 0x00
+#define ASCQ_2AH_MODE_PARAMETERS_CHANGED 0x01
+#define ASCQ_2AH_LOG_PARAMETERS_CHANGED 0x02
+#define ASCQ_2AH_RESERVATIONS_PREEMPTED 0x03
+#define ASCQ_2AH_RESERVATIONS_RELEASED 0x04
+#define ASCQ_2AH_REGISTRATIONS_PREEMPTED 0x05
+#define ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED 0x06
+#define ASCQ_2AH_IMPLICT_ASYMMETRIC_ACCESS_STATE_TRANSITION_FAILED 0x07
+#define ASCQ_2AH_PRIORITY_CHANGED 0x08
+
+#define ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS 0x09
+
+extern struct kmem_cache *se_ua_cache;
+
+extern int core_scsi3_ua_check(struct se_cmd *, unsigned char *);
+extern int core_scsi3_ua_allocate(struct se_node_acl *, u32, u8, u8);
+extern void core_scsi3_ua_release_all(struct se_dev_entry *);
+extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);
+extern int core_scsi3_ua_clear_for_request_sense(struct se_cmd *,
+ u8 *, u8 *);
+
+#endif /* TARGET_CORE_UA_H */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Kconfig b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Kconfig
new file mode 100644
index 0000000..40caf45
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Kconfig
@@ -0,0 +1,5 @@
+config TCM_FC
+ tristate "TCM_FC fabric Plugin"
+ depends on LIBFC
+ help
+ Say Y here to enable the TCM FC plugin for accessing FC fabrics in TCM
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Makefile b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Makefile
new file mode 100644
index 0000000..20b14bb
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/Makefile
@@ -0,0 +1,6 @@
+tcm_fc-y += tfc_cmd.o \
+ tfc_conf.o \
+ tfc_io.o \
+ tfc_sess.o
+
+obj-$(CONFIG_TCM_FC) += tcm_fc.o
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tcm_fc.h b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tcm_fc.h
new file mode 100644
index 0000000..c5eb3c3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tcm_fc.h
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef __TCM_FC_H__
+#define __TCM_FC_H__
+
+#define FT_VERSION "0.4"
+
+#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */
+#define FT_TPG_NAMELEN 32 /* max length of TPG name */
+#define FT_LUN_NAMELEN 32 /* max length of LUN name */
+
+struct ft_transport_id {
+ __u8 format;
+ __u8 __resvd1[7];
+ __u8 wwpn[8];
+ __u8 __resvd2[8];
+} __attribute__((__packed__));
+
+/*
+ * Session (remote port).
+ */
+struct ft_sess {
+ u32 port_id; /* for hash lookup use only */
+ u32 params;
+ u16 max_frame; /* maximum frame size */
+ u64 port_name; /* port name for transport ID */
+ struct ft_tport *tport;
+ struct se_session *se_sess;
+ struct hlist_node hash; /* linkage in ft_sess_hash table */
+ struct rcu_head rcu;
+ struct kref kref; /* ref for hash and outstanding I/Os */
+};
+
+/*
+ * Hash table of sessions per local port.
+ * Hash lookup by remote port FC_ID.
+ */
+#define FT_SESS_HASH_BITS 6
+#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS)
+
+/*
+ * Per local port data.
+ * This is created only after a TPG exists that allows target function
+ * for the local port. If the TPG exists, this is allocated when
+ * we're notified that the local port has been created, or when
+ * the first PRLI provider callback is received.
+ */
+struct ft_tport {
+ struct fc_lport *lport;
+ struct ft_tpg *tpg; /* NULL if TPG deleted before tport */
+ u32 sess_count; /* number of sessions in hash */
+ struct rcu_head rcu;
+ struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */
+};
+
+/*
+ * Node ID and authentication.
+ */
+struct ft_node_auth {
+ u64 port_name;
+ u64 node_name;
+};
+
+/*
+ * Node ACL for FC remote port session.
+ */
+struct ft_node_acl {
+ struct ft_node_auth node_auth;
+ struct se_node_acl se_node_acl;
+};
+
+struct ft_lun {
+ u32 index;
+ char name[FT_LUN_NAMELEN];
+};
+
+/*
+ * Target portal group (local port).
+ */
+struct ft_tpg {
+ u32 index;
+ struct ft_lport_acl *lport_acl;
+ struct ft_tport *tport; /* active tport or NULL */
+ struct list_head list; /* linkage in ft_lport_acl tpg_list */
+ struct list_head lun_list; /* head of LUNs */
+ struct se_portal_group se_tpg;
+ struct workqueue_struct *workqueue;
+};
+
+struct ft_lport_acl {
+ u64 wwpn;
+ char name[FT_NAMELEN];
+ struct list_head list;
+ struct list_head tpg_list;
+ struct se_wwn fc_lport_wwn;
+};
+
+/*
+ * Commands
+ */
+struct ft_cmd {
+ struct ft_sess *sess; /* session held for cmd */
+ struct fc_seq *seq; /* sequence in exchange mgr */
+ struct se_cmd se_cmd; /* Local TCM I/O descriptor */
+ struct fc_frame *req_frame;
+ u32 write_data_len; /* data received on writes */
+ struct work_struct work;
+ /* Local sense buffer */
+ unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];
+ u32 was_ddp_setup:1; /* Set only if ddp is setup */
+ u32 aborted:1; /* Set if aborted by reset or timeout */
+ struct scatterlist *sg; /* Set only if DDP is setup */
+ u32 sg_cnt; /* No. of item in scatterlist */
+};
+
+extern struct list_head ft_lport_list;
+extern struct mutex ft_lport_lock;
+extern struct fc4_prov ft_prov;
+extern struct target_fabric_configfs *ft_configfs;
+
+/*
+ * Fabric methods.
+ */
+
+/*
+ * Session ops.
+ */
+void ft_sess_put(struct ft_sess *);
+int ft_sess_shutdown(struct se_session *);
+void ft_sess_close(struct se_session *);
+u32 ft_sess_get_index(struct se_session *);
+u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);
+
+void ft_lport_add(struct fc_lport *, void *);
+void ft_lport_del(struct fc_lport *, void *);
+int ft_lport_notify(struct notifier_block *, unsigned long, void *);
+
+/*
+ * IO methods.
+ */
+int ft_check_stop_free(struct se_cmd *);
+void ft_release_cmd(struct se_cmd *);
+int ft_queue_status(struct se_cmd *);
+int ft_queue_data_in(struct se_cmd *);
+int ft_write_pending(struct se_cmd *);
+int ft_write_pending_status(struct se_cmd *);
+u32 ft_get_task_tag(struct se_cmd *);
+int ft_get_cmd_state(struct se_cmd *);
+int ft_queue_tm_resp(struct se_cmd *);
+
+/*
+ * other internal functions.
+ */
+void ft_recv_req(struct ft_sess *, struct fc_frame *);
+struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
+struct ft_node_acl *ft_acl_get(struct ft_tpg *, struct fc_rport_priv *);
+
+void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);
+void ft_dump_cmd(struct ft_cmd *, const char *caller);
+
+ssize_t ft_format_wwn(char *, size_t, u64);
+
+/*
+ * Underlying HW specific helper function
+ */
+void ft_invl_hw_context(struct ft_cmd *);
+
+#endif /* __TCM_FC_H__ */
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_cmd.c b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_cmd.c
new file mode 100644
index 0000000..da90f64
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_cmd.c
@@ -0,0 +1,564 @@
+/*
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* XXX TBD some includes may be extraneous */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <linux/ctype.h>
+#include <linux/hash.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_encode.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "tcm_fc.h"
+
+/*
+ * Dump cmd state for debugging.
+ */
+void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
+{
+ struct fc_exch *ep;
+ struct fc_seq *sp;
+ struct se_cmd *se_cmd;
+ struct scatterlist *sg;
+ int count;
+
+ se_cmd = &cmd->se_cmd;
+ pr_debug("%s: cmd %p sess %p seq %p se_cmd %p\n",
+ caller, cmd, cmd->sess, cmd->seq, se_cmd);
+
+ pr_debug("%s: cmd %p data_nents %u len %u se_cmd_flags <0x%x>\n",
+ caller, cmd, se_cmd->t_data_nents,
+ se_cmd->data_length, se_cmd->se_cmd_flags);
+
+ for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, count)
+ pr_debug("%s: cmd %p sg %p page %p "
+ "len 0x%x off 0x%x\n",
+ caller, cmd, sg,
+ sg_page(sg), sg->length, sg->offset);
+
+ sp = cmd->seq;
+ if (sp) {
+ ep = fc_seq_exch(sp);
+ pr_debug("%s: cmd %p sid %x did %x "
+ "ox_id %x rx_id %x seq_id %x e_stat %x\n",
+ caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid,
+ sp->id, ep->esb_stat);
+ }
+}
+
+static void ft_free_cmd(struct ft_cmd *cmd)
+{
+ struct fc_frame *fp;
+ struct fc_lport *lport;
+
+ if (!cmd)
+ return;
+ fp = cmd->req_frame;
+ lport = fr_dev(fp);
+ if (fr_seq(fp))
+ lport->tt.seq_release(fr_seq(fp));
+ fc_frame_free(fp);
+ ft_sess_put(cmd->sess); /* undo get from lookup at recv */
+ kfree(cmd);
+}
+
+void ft_release_cmd(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+
+ ft_free_cmd(cmd);
+}
+
+int ft_check_stop_free(struct se_cmd *se_cmd)
+{
+ transport_generic_free_cmd(se_cmd, 0);
+ return 1;
+}
+
+/*
+ * Send response.
+ */
+int ft_queue_status(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+ struct fc_frame *fp;
+ struct fcp_resp_with_ext *fcp;
+ struct fc_lport *lport;
+ struct fc_exch *ep;
+ size_t len;
+
+ if (cmd->aborted)
+ return 0;
+ ft_dump_cmd(cmd, __func__);
+ ep = fc_seq_exch(cmd->seq);
+ lport = ep->lp;
+ len = sizeof(*fcp) + se_cmd->scsi_sense_length;
+ fp = fc_frame_alloc(lport, len);
+ if (!fp) {
+ /* XXX shouldn't just drop it - requeue and retry? */
+ return 0;
+ }
+ fcp = fc_frame_payload_get(fp, len);
+ memset(fcp, 0, len);
+ fcp->resp.fr_status = se_cmd->scsi_status;
+
+ len = se_cmd->scsi_sense_length;
+ if (len) {
+ fcp->resp.fr_flags |= FCP_SNS_LEN_VAL;
+ fcp->ext.fr_sns_len = htonl(len);
+ memcpy((fcp + 1), se_cmd->sense_buffer, len);
+ }
+
+ /*
+ * Test underflow and overflow with one mask. Usually both are off.
+ * Bidirectional commands are not handled yet.
+ */
+ if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) {
+ if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
+ fcp->resp.fr_flags |= FCP_RESID_OVER;
+ else
+ fcp->resp.fr_flags |= FCP_RESID_UNDER;
+ fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count);
+ }
+
+ /*
+ * Send response.
+ */
+ cmd->seq = lport->tt.seq_start_next(cmd->seq);
+ fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP,
+ FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0);
+
+ lport->tt.seq_send(lport, cmd->seq, fp);
+ lport->tt.exch_done(cmd->seq);
+ return 0;
+}
+
+int ft_write_pending_status(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+
+ return cmd->write_data_len != se_cmd->data_length;
+}
+
+/*
+ * Send TX_RDY (transfer ready).
+ */
+int ft_write_pending(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+ struct fc_frame *fp;
+ struct fcp_txrdy *txrdy;
+ struct fc_lport *lport;
+ struct fc_exch *ep;
+ struct fc_frame_header *fh;
+ u32 f_ctl;
+
+ ft_dump_cmd(cmd, __func__);
+
+ if (cmd->aborted)
+ return 0;
+ ep = fc_seq_exch(cmd->seq);
+ lport = ep->lp;
+ fp = fc_frame_alloc(lport, sizeof(*txrdy));
+ if (!fp)
+ return -ENOMEM; /* Signal QUEUE_FULL */
+
+ txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
+ memset(txrdy, 0, sizeof(*txrdy));
+ txrdy->ft_burst_len = htonl(se_cmd->data_length);
+
+ cmd->seq = lport->tt.seq_start_next(cmd->seq);
+ fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
+ FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
+
+ fh = fc_frame_header_get(fp);
+ f_ctl = ntoh24(fh->fh_f_ctl);
+
+ /* Only if it is 'Exchange Responder' */
+ if (f_ctl & FC_FC_EX_CTX) {
+ /* Target is 'exchange responder' and sending XFER_READY
+ * to 'exchange initiator (initiator)'
+ */
+ if ((ep->xid <= lport->lro_xid) &&
+ (fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
+ if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
+ /*
+ * cmd may have been broken up into multiple
+ * tasks. Link their sgs together so we can
+ * operate on them all at once.
+ */
+ transport_do_task_sg_chain(se_cmd);
+ cmd->sg = se_cmd->t_tasks_sg_chained;
+ cmd->sg_cnt =
+ se_cmd->t_tasks_sg_chained_no;
+ }
+ if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
+ cmd->sg,
+ cmd->sg_cnt))
+ cmd->was_ddp_setup = 1;
+ }
+ }
+ lport->tt.seq_send(lport, cmd->seq, fp);
+ return 0;
+}
+
+u32 ft_get_task_tag(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+
+ if (cmd->aborted)
+ return ~0;
+ return fc_seq_exch(cmd->seq)->rxid;
+}
+
+int ft_get_cmd_state(struct se_cmd *se_cmd)
+{
+ return 0;
+}
+
+/*
+ * FC sequence response handler for follow-on sequences (data) and aborts.
+ */
+static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg)
+{
+ struct ft_cmd *cmd = arg;
+ struct fc_frame_header *fh;
+
+ if (unlikely(IS_ERR(fp))) {
+ /* XXX need to find cmd if queued */
+ cmd->seq = NULL;
+ cmd->aborted = true;
+ return;
+ }
+
+ fh = fc_frame_header_get(fp);
+
+ switch (fh->fh_r_ctl) {
+ case FC_RCTL_DD_SOL_DATA: /* write data */
+ ft_recv_write_data(cmd, fp);
+ break;
+ case FC_RCTL_DD_UNSOL_CTL: /* command */
+ case FC_RCTL_DD_SOL_CTL: /* transfer ready */
+ case FC_RCTL_DD_DATA_DESC: /* transfer ready */
+ default:
+ pr_debug("%s: unhandled frame r_ctl %x\n",
+ __func__, fh->fh_r_ctl);
+ ft_invl_hw_context(cmd);
+ fc_frame_free(fp);
+ transport_generic_free_cmd(&cmd->se_cmd, 0);
+ break;
+ }
+}
+
+/*
+ * Send a FCP response including SCSI status and optional FCP rsp_code.
+ * status is SAM_STAT_GOOD (zero) iff code is valid.
+ * This is used in error cases, such as allocation failures.
+ */
+static void ft_send_resp_status(struct fc_lport *lport,
+ const struct fc_frame *rx_fp,
+ u32 status, enum fcp_resp_rsp_codes code)
+{
+ struct fc_frame *fp;
+ struct fc_seq *sp;
+ const struct fc_frame_header *fh;
+ size_t len;
+ struct fcp_resp_with_ext *fcp;
+ struct fcp_resp_rsp_info *info;
+
+ fh = fc_frame_header_get(rx_fp);
+ pr_debug("FCP error response: did %x oxid %x status %x code %x\n",
+ ntoh24(fh->fh_s_id), ntohs(fh->fh_ox_id), status, code);
+ len = sizeof(*fcp);
+ if (status == SAM_STAT_GOOD)
+ len += sizeof(*info);
+ fp = fc_frame_alloc(lport, len);
+ if (!fp)
+ return;
+ fcp = fc_frame_payload_get(fp, len);
+ memset(fcp, 0, len);
+ fcp->resp.fr_status = status;
+ if (status == SAM_STAT_GOOD) {
+ fcp->ext.fr_rsp_len = htonl(sizeof(*info));
+ fcp->resp.fr_flags |= FCP_RSP_LEN_VAL;
+ info = (struct fcp_resp_rsp_info *)(fcp + 1);
+ info->rsp_code = code;
+ }
+
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0);
+ sp = fr_seq(fp);
+ if (sp) {
+ lport->tt.seq_send(lport, sp, fp);
+ lport->tt.exch_done(sp);
+ } else {
+ lport->tt.frame_send(lport, fp);
+ }
+}
+
+/*
+ * Send error or task management response.
+ */
+static void ft_send_resp_code(struct ft_cmd *cmd,
+ enum fcp_resp_rsp_codes code)
+{
+ ft_send_resp_status(cmd->sess->tport->lport,
+ cmd->req_frame, SAM_STAT_GOOD, code);
+}
+
+
+/*
+ * Send error or task management response.
+ * Always frees the cmd and associated state.
+ */
+static void ft_send_resp_code_and_free(struct ft_cmd *cmd,
+ enum fcp_resp_rsp_codes code)
+{
+ ft_send_resp_code(cmd, code);
+ ft_free_cmd(cmd);
+}
+
+/*
+ * Handle Task Management Request.
+ */
+static void ft_send_tm(struct ft_cmd *cmd)
+{
+ struct fcp_cmnd *fcp;
+ int rc;
+ u8 tm_func;
+
+ fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
+
+ switch (fcp->fc_tm_flags) {
+ case FCP_TMF_LUN_RESET:
+ tm_func = TMR_LUN_RESET;
+ break;
+ case FCP_TMF_TGT_RESET:
+ tm_func = TMR_TARGET_WARM_RESET;
+ break;
+ case FCP_TMF_CLR_TASK_SET:
+ tm_func = TMR_CLEAR_TASK_SET;
+ break;
+ case FCP_TMF_ABT_TASK_SET:
+ tm_func = TMR_ABORT_TASK_SET;
+ break;
+ case FCP_TMF_CLR_ACA:
+ tm_func = TMR_CLEAR_ACA;
+ break;
+ default:
+ /*
+ * FCP4r01 indicates having a combination of
+ * tm_flags set is invalid.
+ */
+ pr_debug("invalid FCP tm_flags %x\n", fcp->fc_tm_flags);
+ ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID);
+ return;
+ }
+
+ /* FIXME: Add referenced task tag for ABORT_TASK */
+ rc = target_submit_tmr(&cmd->se_cmd, cmd->sess->se_sess,
+ &cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
+ cmd, tm_func, GFP_KERNEL, 0, 0);
+ if (rc < 0)
+ ft_send_resp_code_and_free(cmd, FCP_TMF_FAILED);
+}
+
+/*
+ * Send status from completed task management request.
+ */
+int ft_queue_tm_resp(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+ struct se_tmr_req *tmr = se_cmd->se_tmr_req;
+ enum fcp_resp_rsp_codes code;
+
+ if (cmd->aborted)
+ return 0;
+ switch (tmr->response) {
+ case TMR_FUNCTION_COMPLETE:
+ code = FCP_TMF_CMPL;
+ break;
+ case TMR_LUN_DOES_NOT_EXIST:
+ code = FCP_TMF_INVALID_LUN;
+ break;
+ case TMR_FUNCTION_REJECTED:
+ code = FCP_TMF_REJECTED;
+ break;
+ case TMR_TASK_DOES_NOT_EXIST:
+ case TMR_TASK_STILL_ALLEGIANT:
+ case TMR_TASK_FAILOVER_NOT_SUPPORTED:
+ case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED:
+ case TMR_FUNCTION_AUTHORIZATION_FAILED:
+ default:
+ code = FCP_TMF_FAILED;
+ break;
+ }
+ pr_debug("tmr fn %d resp %d fcp code %d\n",
+ tmr->function, tmr->response, code);
+ ft_send_resp_code(cmd, code);
+ return 0;
+}
+
+static void ft_send_work(struct work_struct *work);
+
+/*
+ * Handle incoming FCP command.
+ */
+static void ft_recv_cmd(struct ft_sess *sess, struct fc_frame *fp)
+{
+ struct ft_cmd *cmd;
+ struct fc_lport *lport = sess->tport->lport;
+
+ cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ goto busy;
+ cmd->sess = sess;
+ cmd->seq = lport->tt.seq_assign(lport, fp);
+ if (!cmd->seq) {
+ kfree(cmd);
+ goto busy;
+ }
+ cmd->req_frame = fp; /* hold frame during cmd */
+
+ INIT_WORK(&cmd->work, ft_send_work);
+ queue_work(sess->tport->tpg->workqueue, &cmd->work);
+ return;
+
+busy:
+ pr_debug("cmd or seq allocation failure - sending BUSY\n");
+ ft_send_resp_status(lport, fp, SAM_STAT_BUSY, 0);
+ fc_frame_free(fp);
+ ft_sess_put(sess); /* undo get from lookup */
+}
+
+
+/*
+ * Handle incoming FCP frame.
+ * Caller has verified that the frame is type FCP.
+ */
+void ft_recv_req(struct ft_sess *sess, struct fc_frame *fp)
+{
+ struct fc_frame_header *fh = fc_frame_header_get(fp);
+
+ switch (fh->fh_r_ctl) {
+ case FC_RCTL_DD_UNSOL_CMD: /* command */
+ ft_recv_cmd(sess, fp);
+ break;
+ case FC_RCTL_DD_SOL_DATA: /* write data */
+ case FC_RCTL_DD_UNSOL_CTL:
+ case FC_RCTL_DD_SOL_CTL:
+ case FC_RCTL_DD_DATA_DESC: /* transfer ready */
+ case FC_RCTL_ELS4_REQ: /* SRR, perhaps */
+ default:
+ pr_debug("%s: unhandled frame r_ctl %x\n",
+ __func__, fh->fh_r_ctl);
+ fc_frame_free(fp);
+ ft_sess_put(sess); /* undo get from lookup */
+ break;
+ }
+}
+
+/*
+ * Send new command to target.
+ */
+static void ft_send_work(struct work_struct *work)
+{
+ struct ft_cmd *cmd = container_of(work, struct ft_cmd, work);
+ struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame);
+ struct fcp_cmnd *fcp;
+ int data_dir = 0;
+ int task_attr;
+
+ fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
+ if (!fcp)
+ goto err;
+
+ if (fcp->fc_flags & FCP_CFL_LEN_MASK)
+ goto err; /* not handling longer CDBs yet */
+
+ /*
+ * Check for FCP task management flags
+ */
+ if (fcp->fc_tm_flags) {
+ ft_send_tm(cmd);
+ return;
+ }
+
+ switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) {
+ case 0:
+ data_dir = DMA_NONE;
+ break;
+ case FCP_CFL_RDDATA:
+ data_dir = DMA_FROM_DEVICE;
+ break;
+ case FCP_CFL_WRDATA:
+ data_dir = DMA_TO_DEVICE;
+ break;
+ case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
+ goto err; /* TBD not supported by tcm_fc yet */
+ }
+ /*
+ * Locate the SAM Task Attr from fc_pri_ta
+ */
+ switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
+ case FCP_PTA_HEADQ:
+ task_attr = MSG_HEAD_TAG;
+ break;
+ case FCP_PTA_ORDERED:
+ task_attr = MSG_ORDERED_TAG;
+ break;
+ case FCP_PTA_ACA:
+ task_attr = MSG_ACA_TAG;
+ break;
+ case FCP_PTA_SIMPLE: /* Fallthrough */
+ default:
+ task_attr = MSG_SIMPLE_TAG;
+ }
+
+ fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
+ /*
+ * Use a single se_cmd->cmd_kref as we expect to release se_cmd
+ * directly from ft_check_stop_free callback in response path.
+ */
+ target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb,
+ &cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
+ ntohl(fcp->fc_dl), task_attr, data_dir, 0);
+ pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl);
+ return;
+
+err:
+ ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_conf.c b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_conf.c
new file mode 100644
index 0000000..2948dc9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_conf.c
@@ -0,0 +1,651 @@
+/*******************************************************************************
+ * Filename: tcm_fc.c
+ *
+ * This file contains the configfs implementation for TCM_fc fabric node.
+ * Based on tcm_loop_configfs.c
+ *
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ * Copyright (c) 2009,2010 Rising Tide, Inc.
+ * Copyright (c) 2009,2010 Linux-iSCSI.org
+ *
+ * Copyright (c) 2009,2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/libfc.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "tcm_fc.h"
+
+struct target_fabric_configfs *ft_configfs;
+
+LIST_HEAD(ft_lport_list);
+DEFINE_MUTEX(ft_lport_lock);
+
+unsigned int ft_debug_logging;
+module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+/*
+ * Parse WWN.
+ * If strict, we require lower-case hex and colon separators to be sure
+ * the name is the same as what would be generated by ft_format_wwn()
+ * so the name and wwn are mapped one-to-one.
+ */
+static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict)
+{
+ const char *cp;
+ char c;
+ u32 byte = 0;
+ u32 pos = 0;
+ u32 err;
+ int val;
+
+ *wwn = 0;
+ for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) {
+ c = *cp;
+ if (c == '\n' && cp[1] == '\0')
+ continue;
+ if (strict && pos++ == 2 && byte++ < 7) {
+ pos = 0;
+ if (c == ':')
+ continue;
+ err = 1;
+ goto fail;
+ }
+ if (c == '\0') {
+ err = 2;
+ if (strict && byte != 8)
+ goto fail;
+ return cp - name;
+ }
+ err = 3;
+ val = hex_to_bin(c);
+ if (val < 0 || (strict && isupper(c)))
+ goto fail;
+ *wwn = (*wwn << 4) | val;
+ }
+ err = 4;
+fail:
+ pr_debug("err %u len %zu pos %u byte %u\n",
+ err, cp - name, pos, byte);
+ return -1;
+}
+
+ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn)
+{
+ u8 b[8];
+
+ put_unaligned_be64(wwn, b);
+ return snprintf(buf, len,
+ "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
+ b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
+}
+
+static ssize_t ft_wwn_show(void *arg, char *buf)
+{
+ u64 *wwn = arg;
+ ssize_t len;
+
+ len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn);
+ buf[len++] = '\n';
+ return len;
+}
+
+static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len)
+{
+ ssize_t ret;
+ u64 wwn;
+
+ ret = ft_parse_wwn(buf, &wwn, 0);
+ if (ret > 0)
+ *(u64 *)arg = wwn;
+ return ret;
+}
+
+/*
+ * ACL auth ops.
+ */
+
+static ssize_t ft_nacl_show_port_name(
+ struct se_node_acl *se_nacl,
+ char *page)
+{
+ struct ft_node_acl *acl = container_of(se_nacl,
+ struct ft_node_acl, se_node_acl);
+
+ return ft_wwn_show(&acl->node_auth.port_name, page);
+}
+
+static ssize_t ft_nacl_store_port_name(
+ struct se_node_acl *se_nacl,
+ const char *page,
+ size_t count)
+{
+ struct ft_node_acl *acl = container_of(se_nacl,
+ struct ft_node_acl, se_node_acl);
+
+ return ft_wwn_store(&acl->node_auth.port_name, page, count);
+}
+
+TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR);
+
+static ssize_t ft_nacl_show_node_name(
+ struct se_node_acl *se_nacl,
+ char *page)
+{
+ struct ft_node_acl *acl = container_of(se_nacl,
+ struct ft_node_acl, se_node_acl);
+
+ return ft_wwn_show(&acl->node_auth.node_name, page);
+}
+
+static ssize_t ft_nacl_store_node_name(
+ struct se_node_acl *se_nacl,
+ const char *page,
+ size_t count)
+{
+ struct ft_node_acl *acl = container_of(se_nacl,
+ struct ft_node_acl, se_node_acl);
+
+ return ft_wwn_store(&acl->node_auth.node_name, page, count);
+}
+
+TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *ft_nacl_base_attrs[] = {
+ &ft_nacl_port_name.attr,
+ &ft_nacl_node_name.attr,
+ NULL,
+};
+
+/*
+ * ACL ops.
+ */
+
+/*
+ * Add ACL for an initiator. The ACL is named arbitrarily.
+ * The port_name and/or node_name are attributes.
+ */
+static struct se_node_acl *ft_add_acl(
+ struct se_portal_group *se_tpg,
+ struct config_group *group,
+ const char *name)
+{
+ struct ft_node_acl *acl;
+ struct ft_tpg *tpg;
+ u64 wwpn;
+ u32 q_depth;
+
+ pr_debug("add acl %s\n", name);
+ tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
+
+ if (ft_parse_wwn(name, &wwpn, 1) < 0)
+ return ERR_PTR(-EINVAL);
+
+ acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL);
+ if (!acl)
+ return ERR_PTR(-ENOMEM);
+ acl->node_auth.port_name = wwpn;
+
+ q_depth = 32; /* XXX bogus default - get from tpg? */
+ return core_tpg_add_initiator_node_acl(&tpg->se_tpg,
+ &acl->se_node_acl, name, q_depth);
+}
+
+static void ft_del_acl(struct se_node_acl *se_acl)
+{
+ struct se_portal_group *se_tpg = se_acl->se_tpg;
+ struct ft_tpg *tpg;
+ struct ft_node_acl *acl = container_of(se_acl,
+ struct ft_node_acl, se_node_acl);
+
+ pr_debug("del acl %s\n",
+ config_item_name(&se_acl->acl_group.cg_item));
+
+ tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
+ pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n",
+ acl, se_acl, tpg, &tpg->se_tpg);
+
+ core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1);
+ kfree(acl);
+}
+
+struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
+{
+ struct ft_node_acl *found = NULL;
+ struct ft_node_acl *acl;
+ struct se_portal_group *se_tpg = &tpg->se_tpg;
+ struct se_node_acl *se_acl;
+
+ spin_lock_irq(&se_tpg->acl_node_lock);
+ list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) {
+ acl = container_of(se_acl, struct ft_node_acl, se_node_acl);
+ pr_debug("acl %p port_name %llx\n",
+ acl, (unsigned long long)acl->node_auth.port_name);
+ if (acl->node_auth.port_name == rdata->ids.port_name ||
+ acl->node_auth.node_name == rdata->ids.node_name) {
+ pr_debug("acl %p port_name %llx matched\n", acl,
+ (unsigned long long)rdata->ids.port_name);
+ found = acl;
+ /* XXX need to hold onto ACL */
+ break;
+ }
+ }
+ spin_unlock_irq(&se_tpg->acl_node_lock);
+ return found;
+}
+
+struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg)
+{
+ struct ft_node_acl *acl;
+
+ acl = kzalloc(sizeof(*acl), GFP_KERNEL);
+ if (!acl) {
+ pr_err("Unable to allocate struct ft_node_acl\n");
+ return NULL;
+ }
+ pr_debug("acl %p\n", acl);
+ return &acl->se_node_acl;
+}
+
+static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg,
+ struct se_node_acl *se_acl)
+{
+ struct ft_node_acl *acl = container_of(se_acl,
+ struct ft_node_acl, se_node_acl);
+
+ pr_debug("acl %p\n", acl);
+ kfree(acl);
+}
+
+/*
+ * local_port port_group (tpg) ops.
+ */
+static struct se_portal_group *ft_add_tpg(
+ struct se_wwn *wwn,
+ struct config_group *group,
+ const char *name)
+{
+ struct ft_lport_acl *lacl;
+ struct ft_tpg *tpg;
+ struct workqueue_struct *wq;
+ unsigned long index;
+ int ret;
+
+ pr_debug("tcm_fc: add tpg %s\n", name);
+
+ /*
+ * Name must be "tpgt_" followed by the index.
+ */
+ if (strstr(name, "tpgt_") != name)
+ return NULL;
+ if (strict_strtoul(name + 5, 10, &index) || index > UINT_MAX)
+ return NULL;
+
+ lacl = container_of(wwn, struct ft_lport_acl, fc_lport_wwn);
+ tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
+ if (!tpg)
+ return NULL;
+ tpg->index = index;
+ tpg->lport_acl = lacl;
+ INIT_LIST_HEAD(&tpg->lun_list);
+
+ wq = alloc_workqueue("tcm_fc", 0, 1);
+ if (!wq) {
+ kfree(tpg);
+ return NULL;
+ }
+
+ ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
+ tpg, TRANSPORT_TPG_TYPE_NORMAL);
+ if (ret < 0) {
+ destroy_workqueue(wq);
+ kfree(tpg);
+ return NULL;
+ }
+ tpg->workqueue = wq;
+
+ mutex_lock(&ft_lport_lock);
+ list_add_tail(&tpg->list, &lacl->tpg_list);
+ mutex_unlock(&ft_lport_lock);
+
+ return &tpg->se_tpg;
+}
+
+static void ft_del_tpg(struct se_portal_group *se_tpg)
+{
+ struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
+
+ pr_debug("del tpg %s\n",
+ config_item_name(&tpg->se_tpg.tpg_group.cg_item));
+
+ destroy_workqueue(tpg->workqueue);
+
+ /* Wait for sessions to be freed thru RCU, for BUG_ON below */
+ synchronize_rcu();
+
+ mutex_lock(&ft_lport_lock);
+ list_del(&tpg->list);
+ if (tpg->tport) {
+ tpg->tport->tpg = NULL;
+ tpg->tport = NULL;
+ }
+ mutex_unlock(&ft_lport_lock);
+
+ core_tpg_deregister(se_tpg);
+ kfree(tpg);
+}
+
+/*
+ * Verify that an lport is configured to use the tcm_fc module, and return
+ * the target port group that should be used.
+ *
+ * The caller holds ft_lport_lock.
+ */
+struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport)
+{
+ struct ft_lport_acl *lacl;
+ struct ft_tpg *tpg;
+
+ list_for_each_entry(lacl, &ft_lport_list, list) {
+ if (lacl->wwpn == lport->wwpn) {
+ list_for_each_entry(tpg, &lacl->tpg_list, list)
+ return tpg; /* XXX for now return first entry */
+ return NULL;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * target config instance ops.
+ */
+
+/*
+ * Add lport to allowed config.
+ * The name is the WWPN in lower-case ASCII, colon-separated bytes.
+ */
+static struct se_wwn *ft_add_lport(
+ struct target_fabric_configfs *tf,
+ struct config_group *group,
+ const char *name)
+{
+ struct ft_lport_acl *lacl;
+ struct ft_lport_acl *old_lacl;
+ u64 wwpn;
+
+ pr_debug("add lport %s\n", name);
+ if (ft_parse_wwn(name, &wwpn, 1) < 0)
+ return NULL;
+ lacl = kzalloc(sizeof(*lacl), GFP_KERNEL);
+ if (!lacl)
+ return NULL;
+ lacl->wwpn = wwpn;
+ INIT_LIST_HEAD(&lacl->tpg_list);
+
+ mutex_lock(&ft_lport_lock);
+ list_for_each_entry(old_lacl, &ft_lport_list, list) {
+ if (old_lacl->wwpn == wwpn) {
+ mutex_unlock(&ft_lport_lock);
+ kfree(lacl);
+ return NULL;
+ }
+ }
+ list_add_tail(&lacl->list, &ft_lport_list);
+ ft_format_wwn(lacl->name, sizeof(lacl->name), wwpn);
+ mutex_unlock(&ft_lport_lock);
+
+ return &lacl->fc_lport_wwn;
+}
+
+static void ft_del_lport(struct se_wwn *wwn)
+{
+ struct ft_lport_acl *lacl = container_of(wwn,
+ struct ft_lport_acl, fc_lport_wwn);
+
+ pr_debug("del lport %s\n", lacl->name);
+ mutex_lock(&ft_lport_lock);
+ list_del(&lacl->list);
+ mutex_unlock(&ft_lport_lock);
+
+ kfree(lacl);
+}
+
+static ssize_t ft_wwn_show_attr_version(
+ struct target_fabric_configfs *tf,
+ char *page)
+{
+ return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on "
+ ""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
+}
+
+TF_WWN_ATTR_RO(ft, version);
+
+static struct configfs_attribute *ft_wwn_attrs[] = {
+ &ft_wwn_version.attr,
+ NULL,
+};
+
+static char *ft_get_fabric_name(void)
+{
+ return "fc";
+}
+
+static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg)
+{
+ struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return tpg->lport_acl->name;
+}
+
+static u16 ft_get_tag(struct se_portal_group *se_tpg)
+{
+ struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ /*
+ * This tag is used when forming SCSI Name identifier in EVPD=1 0x83
+ * to represent the SCSI Target Port.
+ */
+ return tpg->index;
+}
+
+static u32 ft_get_default_depth(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+static int ft_check_false(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+static void ft_set_default_node_attr(struct se_node_acl *se_nacl)
+{
+}
+
+static u16 ft_get_fabric_sense_len(void)
+{
+ return 0;
+}
+
+static u16 ft_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_len)
+{
+ return 0;
+}
+
+static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg)
+{
+ struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
+
+ return tpg->index;
+}
+
+static struct target_core_fabric_ops ft_fabric_ops = {
+ .get_fabric_name = ft_get_fabric_name,
+ .get_fabric_proto_ident = fc_get_fabric_proto_ident,
+ .tpg_get_wwn = ft_get_fabric_wwn,
+ .tpg_get_tag = ft_get_tag,
+ .tpg_get_default_depth = ft_get_default_depth,
+ .tpg_get_pr_transport_id = fc_get_pr_transport_id,
+ .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len,
+ .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id,
+ .tpg_check_demo_mode = ft_check_false,
+ .tpg_check_demo_mode_cache = ft_check_false,
+ .tpg_check_demo_mode_write_protect = ft_check_false,
+ .tpg_check_prod_mode_write_protect = ft_check_false,
+ .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl,
+ .tpg_release_fabric_acl = ft_tpg_release_fabric_acl,
+ .tpg_get_inst_index = ft_tpg_get_inst_index,
+ .check_stop_free = ft_check_stop_free,
+ .release_cmd = ft_release_cmd,
+ .shutdown_session = ft_sess_shutdown,
+ .close_session = ft_sess_close,
+ .sess_get_index = ft_sess_get_index,
+ .sess_get_initiator_sid = NULL,
+ .write_pending = ft_write_pending,
+ .write_pending_status = ft_write_pending_status,
+ .set_default_node_attributes = ft_set_default_node_attr,
+ .get_task_tag = ft_get_task_tag,
+ .get_cmd_state = ft_get_cmd_state,
+ .queue_data_in = ft_queue_data_in,
+ .queue_status = ft_queue_status,
+ .queue_tm_rsp = ft_queue_tm_resp,
+ .get_fabric_sense_len = ft_get_fabric_sense_len,
+ .set_fabric_sense_len = ft_set_fabric_sense_len,
+ /*
+ * Setup function pointers for generic logic in
+ * target_core_fabric_configfs.c
+ */
+ .fabric_make_wwn = &ft_add_lport,
+ .fabric_drop_wwn = &ft_del_lport,
+ .fabric_make_tpg = &ft_add_tpg,
+ .fabric_drop_tpg = &ft_del_tpg,
+ .fabric_post_link = NULL,
+ .fabric_pre_unlink = NULL,
+ .fabric_make_np = NULL,
+ .fabric_drop_np = NULL,
+ .fabric_make_nodeacl = &ft_add_acl,
+ .fabric_drop_nodeacl = &ft_del_acl,
+};
+
+int ft_register_configfs(void)
+{
+ struct target_fabric_configfs *fabric;
+ int ret;
+
+ /*
+ * Register the top level struct config_item_type with TCM core
+ */
+ fabric = target_fabric_configfs_init(THIS_MODULE, "fc");
+ if (IS_ERR(fabric)) {
+ pr_err("%s: target_fabric_configfs_init() failed!\n",
+ __func__);
+ return PTR_ERR(fabric);
+ }
+ fabric->tf_ops = ft_fabric_ops;
+
+ /* Allowing support for task_sg_chaining */
+ fabric->tf_ops.task_sg_chaining = 1;
+
+ /*
+ * Setup default attribute lists for various fabric->tf_cit_tmpl
+ */
+ TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = ft_wwn_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs =
+ ft_nacl_base_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
+ /*
+ * register the fabric for use within TCM
+ */
+ ret = target_fabric_configfs_register(fabric);
+ if (ret < 0) {
+ pr_debug("target_fabric_configfs_register() for"
+ " FC Target failed!\n");
+ target_fabric_configfs_free(fabric);
+ return -1;
+ }
+
+ /*
+ * Setup our local pointer to *fabric.
+ */
+ ft_configfs = fabric;
+ return 0;
+}
+
+void ft_deregister_configfs(void)
+{
+ if (!ft_configfs)
+ return;
+ target_fabric_configfs_deregister(ft_configfs);
+ ft_configfs = NULL;
+}
+
+static struct notifier_block ft_notifier = {
+ .notifier_call = ft_lport_notify
+};
+
+static int __init ft_init(void)
+{
+ if (ft_register_configfs())
+ return -1;
+ if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) {
+ ft_deregister_configfs();
+ return -1;
+ }
+ blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier);
+ fc_lport_iterate(ft_lport_add, NULL);
+ return 0;
+}
+
+static void __exit ft_exit(void)
+{
+ blocking_notifier_chain_unregister(&fc_lport_notifier_head,
+ &ft_notifier);
+ fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov);
+ fc_lport_iterate(ft_lport_del, NULL);
+ ft_deregister_configfs();
+ synchronize_rcu();
+}
+
+MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION);
+MODULE_LICENSE("GPL");
+module_init(ft_init);
+module_exit(ft_exit);
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_io.c b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_io.c
new file mode 100644
index 0000000..8d5cf53
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_io.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ *
+ * Portions based on tcm_loop_fabric_scsi.c and libfc/fc_fcp.c
+ *
+ * Copyright (c) 2007 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008 Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2008 Mike Christie
+ * Copyright (c) 2009 Rising Tide, Inc.
+ * Copyright (c) 2009 Linux-iSCSI.org
+ * Copyright (c) 2009 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* XXX TBD some includes may be extraneous */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <linux/ctype.h>
+#include <linux/hash.h>
+#include <linux/ratelimit.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_encode.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "tcm_fc.h"
+
+/*
+ * Deliver read data back to initiator.
+ * XXX TBD handle resource problems later.
+ */
+int ft_queue_data_in(struct se_cmd *se_cmd)
+{
+ struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
+ struct fc_frame *fp = NULL;
+ struct fc_exch *ep;
+ struct fc_lport *lport;
+ struct scatterlist *sg = NULL;
+ size_t remaining;
+ u32 f_ctl = FC_FC_EX_CTX | FC_FC_REL_OFF;
+ u32 mem_off = 0;
+ u32 fh_off = 0;
+ u32 frame_off = 0;
+ size_t frame_len = 0;
+ size_t mem_len = 0;
+ size_t tlen;
+ size_t off_in_page;
+ struct page *page = NULL;
+ int use_sg;
+ int error;
+ void *page_addr;
+ void *from;
+ void *to = NULL;
+
+ if (cmd->aborted)
+ return 0;
+ ep = fc_seq_exch(cmd->seq);
+ lport = ep->lp;
+ cmd->seq = lport->tt.seq_start_next(cmd->seq);
+
+ remaining = se_cmd->data_length;
+
+ /*
+ * Setup to use first mem list entry, unless no data.
+ */
+ BUG_ON(remaining && !se_cmd->t_data_sg);
+ if (remaining) {
+ sg = se_cmd->t_data_sg;
+ mem_len = sg->length;
+ mem_off = sg->offset;
+ page = sg_page(sg);
+ }
+
+ /* no scatter/gather in skb for odd word length due to fc_seq_send() */
+ use_sg = !(remaining % 4);
+
+ while (remaining) {
+ if (!mem_len) {
+ sg = sg_next(sg);
+ mem_len = min((size_t)sg->length, remaining);
+ mem_off = sg->offset;
+ page = sg_page(sg);
+ }
+ if (!frame_len) {
+ /*
+ * If lport's has capability of Large Send Offload LSO)
+ * , then allow 'frame_len' to be as big as 'lso_max'
+ * if indicated transfer length is >= lport->lso_max
+ */
+ frame_len = (lport->seq_offload) ? lport->lso_max :
+ cmd->sess->max_frame;
+ frame_len = min(frame_len, remaining);
+ fp = fc_frame_alloc(lport, use_sg ? 0 : frame_len);
+ if (!fp)
+ return -ENOMEM;
+ to = fc_frame_payload_get(fp, 0);
+ fh_off = frame_off;
+ frame_off += frame_len;
+ /*
+ * Setup the frame's max payload which is used by base
+ * driver to indicate HW about max frame size, so that
+ * HW can do fragmentation appropriately based on
+ * "gso_max_size" of underline netdev.
+ */
+ fr_max_payload(fp) = cmd->sess->max_frame;
+ }
+ tlen = min(mem_len, frame_len);
+
+ if (use_sg) {
+ off_in_page = mem_off;
+ BUG_ON(!page);
+ get_page(page);
+ skb_fill_page_desc(fp_skb(fp),
+ skb_shinfo(fp_skb(fp))->nr_frags,
+ page, off_in_page, tlen);
+ fr_len(fp) += tlen;
+ fp_skb(fp)->data_len += tlen;
+ fp_skb(fp)->truesize +=
+ PAGE_SIZE << compound_order(page);
+ } else {
+ BUG_ON(!page);
+ from = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
+ page_addr = from;
+ from += mem_off & ~PAGE_MASK;
+ tlen = min(tlen, (size_t)(PAGE_SIZE -
+ (mem_off & ~PAGE_MASK)));
+ memcpy(to, from, tlen);
+ kunmap_atomic(page_addr);
+ to += tlen;
+ }
+
+ mem_off += tlen;
+ mem_len -= tlen;
+ frame_len -= tlen;
+ remaining -= tlen;
+
+ if (frame_len &&
+ (skb_shinfo(fp_skb(fp))->nr_frags < FC_FRAME_SG_LEN))
+ continue;
+ if (!remaining)
+ f_ctl |= FC_FC_END_SEQ;
+ fc_fill_fc_hdr(fp, FC_RCTL_DD_SOL_DATA, ep->did, ep->sid,
+ FC_TYPE_FCP, f_ctl, fh_off);
+ error = lport->tt.seq_send(lport, cmd->seq, fp);
+ if (error) {
+ /* XXX For now, initiator will retry */
+ pr_err_ratelimited("%s: Failed to send frame %p, "
+ "xid <0x%x>, remaining %zu, "
+ "lso_max <0x%x>\n",
+ __func__, fp, ep->xid,
+ remaining, lport->lso_max);
+ }
+ }
+ return ft_queue_status(se_cmd);
+}
+
+/*
+ * Receive write data frame.
+ */
+void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
+{
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+ struct fc_seq *seq = cmd->seq;
+ struct fc_exch *ep;
+ struct fc_lport *lport;
+ struct fc_frame_header *fh;
+ struct scatterlist *sg = NULL;
+ u32 mem_off = 0;
+ u32 rel_off;
+ size_t frame_len;
+ size_t mem_len = 0;
+ size_t tlen;
+ struct page *page = NULL;
+ void *page_addr;
+ void *from;
+ void *to;
+ u32 f_ctl;
+ void *buf;
+
+ fh = fc_frame_header_get(fp);
+ if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
+ goto drop;
+
+ f_ctl = ntoh24(fh->fh_f_ctl);
+ ep = fc_seq_exch(seq);
+ lport = ep->lp;
+ if (cmd->was_ddp_setup) {
+ BUG_ON(!ep);
+ BUG_ON(!lport);
+ /*
+ * Since DDP (Large Rx offload) was setup for this request,
+ * payload is expected to be copied directly to user buffers.
+ */
+ buf = fc_frame_payload_get(fp, 1);
+ if (buf)
+ pr_err("%s: xid 0x%x, f_ctl 0x%x, cmd->sg %p, "
+ "cmd->sg_cnt 0x%x. DDP was setup"
+ " hence not expected to receive frame with "
+ "payload, Frame will be dropped if"
+ "'Sequence Initiative' bit in f_ctl is"
+ "not set\n", __func__, ep->xid, f_ctl,
+ cmd->sg, cmd->sg_cnt);
+ /*
+ * Invalidate HW DDP context if it was setup for respective
+ * command. Invalidation of HW DDP context is requited in both
+ * situation (success and error).
+ */
+ ft_invl_hw_context(cmd);
+
+ /*
+ * If "Sequence Initiative (TSI)" bit set in f_ctl, means last
+ * write data frame is received successfully where payload is
+ * posted directly to user buffer and only the last frame's
+ * header is posted in receive queue.
+ *
+ * If "Sequence Initiative (TSI)" bit is not set, means error
+ * condition w.r.t. DDP, hence drop the packet and let explict
+ * ABORTS from other end of exchange timer trigger the recovery.
+ */
+ if (f_ctl & FC_FC_SEQ_INIT)
+ goto last_frame;
+ else
+ goto drop;
+ }
+
+ rel_off = ntohl(fh->fh_parm_offset);
+ frame_len = fr_len(fp);
+ if (frame_len <= sizeof(*fh))
+ goto drop;
+ frame_len -= sizeof(*fh);
+ from = fc_frame_payload_get(fp, 0);
+ if (rel_off >= se_cmd->data_length)
+ goto drop;
+ if (frame_len + rel_off > se_cmd->data_length)
+ frame_len = se_cmd->data_length - rel_off;
+
+ /*
+ * Setup to use first mem list entry, unless no data.
+ */
+ BUG_ON(frame_len && !se_cmd->t_data_sg);
+ if (frame_len) {
+ sg = se_cmd->t_data_sg;
+ mem_len = sg->length;
+ mem_off = sg->offset;
+ page = sg_page(sg);
+ }
+
+ while (frame_len) {
+ if (!mem_len) {
+ sg = sg_next(sg);
+ mem_len = sg->length;
+ mem_off = sg->offset;
+ page = sg_page(sg);
+ }
+ if (rel_off >= mem_len) {
+ rel_off -= mem_len;
+ mem_len = 0;
+ continue;
+ }
+ mem_off += rel_off;
+ mem_len -= rel_off;
+ rel_off = 0;
+
+ tlen = min(mem_len, frame_len);
+
+ to = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
+ page_addr = to;
+ to += mem_off & ~PAGE_MASK;
+ tlen = min(tlen, (size_t)(PAGE_SIZE -
+ (mem_off & ~PAGE_MASK)));
+ memcpy(to, from, tlen);
+ kunmap_atomic(page_addr);
+
+ from += tlen;
+ frame_len -= tlen;
+ mem_off += tlen;
+ mem_len -= tlen;
+ cmd->write_data_len += tlen;
+ }
+last_frame:
+ if (cmd->write_data_len == se_cmd->data_length)
+ transport_generic_handle_data(se_cmd);
+drop:
+ fc_frame_free(fp);
+}
+
+/*
+ * Handle and cleanup any HW specific resources if
+ * received ABORTS, errors, timeouts.
+ */
+void ft_invl_hw_context(struct ft_cmd *cmd)
+{
+ struct fc_seq *seq = cmd->seq;
+ struct fc_exch *ep = NULL;
+ struct fc_lport *lport = NULL;
+
+ BUG_ON(!cmd);
+
+ /* Cleanup the DDP context in HW if DDP was setup */
+ if (cmd->was_ddp_setup && seq) {
+ ep = fc_seq_exch(seq);
+ if (ep) {
+ lport = ep->lp;
+ if (lport && (ep->xid <= lport->lro_xid)) {
+ /*
+ * "ddp_done" trigger invalidation of HW
+ * specific DDP context
+ */
+ cmd->write_data_len = lport->tt.ddp_done(lport,
+ ep->xid);
+
+ /*
+ * Resetting same variable to indicate HW's
+ * DDP context has been invalidated to avoid
+ * re_invalidation of same context (context is
+ * identified using ep->xid)
+ */
+ cmd->was_ddp_setup = 0;
+ }
+ }
+ }
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_sess.c b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_sess.c
new file mode 100644
index 0000000..5ac8d56
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/target/tcm_fc/tfc_sess.c
@@ -0,0 +1,512 @@
+/*
+ * Copyright (c) 2010 Cisco Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* XXX TBD some includes may be extraneous */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <linux/ctype.h>
+#include <linux/hash.h>
+#include <linux/rcupdate.h>
+#include <linux/rculist.h>
+#include <linux/kref.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/libfc.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "tcm_fc.h"
+
+static void ft_sess_delete_all(struct ft_tport *);
+
+/*
+ * Lookup or allocate target local port.
+ * Caller holds ft_lport_lock.
+ */
+static struct ft_tport *ft_tport_create(struct fc_lport *lport)
+{
+ struct ft_tpg *tpg;
+ struct ft_tport *tport;
+ int i;
+
+ tport = rcu_dereference_protected(lport->prov[FC_TYPE_FCP],
+ lockdep_is_held(&ft_lport_lock));
+ if (tport && tport->tpg)
+ return tport;
+
+ tpg = ft_lport_find_tpg(lport);
+ if (!tpg)
+ return NULL;
+
+ if (tport) {
+ tport->tpg = tpg;
+ tpg->tport = tport;
+ return tport;
+ }
+
+ tport = kzalloc(sizeof(*tport), GFP_KERNEL);
+ if (!tport)
+ return NULL;
+
+ tport->lport = lport;
+ tport->tpg = tpg;
+ tpg->tport = tport;
+ for (i = 0; i < FT_SESS_HASH_SIZE; i++)
+ INIT_HLIST_HEAD(&tport->hash[i]);
+
+ rcu_assign_pointer(lport->prov[FC_TYPE_FCP], tport);
+ return tport;
+}
+
+/*
+ * Delete a target local port.
+ * Caller holds ft_lport_lock.
+ */
+static void ft_tport_delete(struct ft_tport *tport)
+{
+ struct fc_lport *lport;
+ struct ft_tpg *tpg;
+
+ ft_sess_delete_all(tport);
+ lport = tport->lport;
+ BUG_ON(tport != lport->prov[FC_TYPE_FCP]);
+ rcu_assign_pointer(lport->prov[FC_TYPE_FCP], NULL);
+
+ tpg = tport->tpg;
+ if (tpg) {
+ tpg->tport = NULL;
+ tport->tpg = NULL;
+ }
+ kfree_rcu(tport, rcu);
+}
+
+/*
+ * Add local port.
+ * Called thru fc_lport_iterate().
+ */
+void ft_lport_add(struct fc_lport *lport, void *arg)
+{
+ mutex_lock(&ft_lport_lock);
+ ft_tport_create(lport);
+ mutex_unlock(&ft_lport_lock);
+}
+
+/*
+ * Delete local port.
+ * Called thru fc_lport_iterate().
+ */
+void ft_lport_del(struct fc_lport *lport, void *arg)
+{
+ struct ft_tport *tport;
+
+ mutex_lock(&ft_lport_lock);
+ tport = lport->prov[FC_TYPE_FCP];
+ if (tport)
+ ft_tport_delete(tport);
+ mutex_unlock(&ft_lport_lock);
+}
+
+/*
+ * Notification of local port change from libfc.
+ * Create or delete local port and associated tport.
+ */
+int ft_lport_notify(struct notifier_block *nb, unsigned long event, void *arg)
+{
+ struct fc_lport *lport = arg;
+
+ switch (event) {
+ case FC_LPORT_EV_ADD:
+ ft_lport_add(lport, NULL);
+ break;
+ case FC_LPORT_EV_DEL:
+ ft_lport_del(lport, NULL);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Hash function for FC_IDs.
+ */
+static u32 ft_sess_hash(u32 port_id)
+{
+ return hash_32(port_id, FT_SESS_HASH_BITS);
+}
+
+/*
+ * Find session in local port.
+ * Sessions and hash lists are RCU-protected.
+ * A reference is taken which must be eventually freed.
+ */
+static struct ft_sess *ft_sess_get(struct fc_lport *lport, u32 port_id)
+{
+ struct ft_tport *tport;
+ struct hlist_head *head;
+ struct hlist_node *pos;
+ struct ft_sess *sess;
+
+ rcu_read_lock();
+ tport = rcu_dereference(lport->prov[FC_TYPE_FCP]);
+ if (!tport)
+ goto out;
+
+ head = &tport->hash[ft_sess_hash(port_id)];
+ hlist_for_each_entry_rcu(sess, pos, head, hash) {
+ if (sess->port_id == port_id) {
+ kref_get(&sess->kref);
+ rcu_read_unlock();
+ pr_debug("port_id %x found %p\n", port_id, sess);
+ return sess;
+ }
+ }
+out:
+ rcu_read_unlock();
+ pr_debug("port_id %x not found\n", port_id);
+ return NULL;
+}
+
+/*
+ * Allocate session and enter it in the hash for the local port.
+ * Caller holds ft_lport_lock.
+ */
+static struct ft_sess *ft_sess_create(struct ft_tport *tport, u32 port_id,
+ struct ft_node_acl *acl)
+{
+ struct ft_sess *sess;
+ struct hlist_head *head;
+ struct hlist_node *pos;
+
+ head = &tport->hash[ft_sess_hash(port_id)];
+ hlist_for_each_entry_rcu(sess, pos, head, hash)
+ if (sess->port_id == port_id)
+ return sess;
+
+ sess = kzalloc(sizeof(*sess), GFP_KERNEL);
+ if (!sess)
+ return NULL;
+
+ sess->se_sess = transport_init_session();
+ if (IS_ERR(sess->se_sess)) {
+ kfree(sess);
+ return NULL;
+ }
+ sess->se_sess->se_node_acl = &acl->se_node_acl;
+ sess->tport = tport;
+ sess->port_id = port_id;
+ kref_init(&sess->kref); /* ref for table entry */
+ hlist_add_head_rcu(&sess->hash, head);
+ tport->sess_count++;
+
+ pr_debug("port_id %x sess %p\n", port_id, sess);
+
+ transport_register_session(&tport->tpg->se_tpg, &acl->se_node_acl,
+ sess->se_sess, sess);
+ return sess;
+}
+
+/*
+ * Unhash the session.
+ * Caller holds ft_lport_lock.
+ */
+static void ft_sess_unhash(struct ft_sess *sess)
+{
+ struct ft_tport *tport = sess->tport;
+
+ hlist_del_rcu(&sess->hash);
+ BUG_ON(!tport->sess_count);
+ tport->sess_count--;
+ sess->port_id = -1;
+ sess->params = 0;
+}
+
+/*
+ * Delete session from hash.
+ * Caller holds ft_lport_lock.
+ */
+static struct ft_sess *ft_sess_delete(struct ft_tport *tport, u32 port_id)
+{
+ struct hlist_head *head;
+ struct hlist_node *pos;
+ struct ft_sess *sess;
+
+ head = &tport->hash[ft_sess_hash(port_id)];
+ hlist_for_each_entry_rcu(sess, pos, head, hash) {
+ if (sess->port_id == port_id) {
+ ft_sess_unhash(sess);
+ return sess;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Delete all sessions from tport.
+ * Caller holds ft_lport_lock.
+ */
+static void ft_sess_delete_all(struct ft_tport *tport)
+{
+ struct hlist_head *head;
+ struct hlist_node *pos;
+ struct ft_sess *sess;
+
+ for (head = tport->hash;
+ head < &tport->hash[FT_SESS_HASH_SIZE]; head++) {
+ hlist_for_each_entry_rcu(sess, pos, head, hash) {
+ ft_sess_unhash(sess);
+ transport_deregister_session_configfs(sess->se_sess);
+ ft_sess_put(sess); /* release from table */
+ }
+ }
+}
+
+/*
+ * TCM ops for sessions.
+ */
+
+/*
+ * Determine whether session is allowed to be shutdown in the current context.
+ * Returns non-zero if the session should be shutdown.
+ */
+int ft_sess_shutdown(struct se_session *se_sess)
+{
+ struct ft_sess *sess = se_sess->fabric_sess_ptr;
+
+ pr_debug("port_id %x\n", sess->port_id);
+ return 1;
+}
+
+/*
+ * Remove session and send PRLO.
+ * This is called when the ACL is being deleted or queue depth is changing.
+ */
+void ft_sess_close(struct se_session *se_sess)
+{
+ struct ft_sess *sess = se_sess->fabric_sess_ptr;
+ u32 port_id;
+
+ mutex_lock(&ft_lport_lock);
+ port_id = sess->port_id;
+ if (port_id == -1) {
+ mutex_unlock(&ft_lport_lock);
+ return;
+ }
+ pr_debug("port_id %x\n", port_id);
+ ft_sess_unhash(sess);
+ mutex_unlock(&ft_lport_lock);
+ transport_deregister_session_configfs(se_sess);
+ ft_sess_put(sess);
+ /* XXX Send LOGO or PRLO */
+ synchronize_rcu(); /* let transport deregister happen */
+}
+
+u32 ft_sess_get_index(struct se_session *se_sess)
+{
+ struct ft_sess *sess = se_sess->fabric_sess_ptr;
+
+ return sess->port_id; /* XXX TBD probably not what is needed */
+}
+
+u32 ft_sess_get_port_name(struct se_session *se_sess,
+ unsigned char *buf, u32 len)
+{
+ struct ft_sess *sess = se_sess->fabric_sess_ptr;
+
+ return ft_format_wwn(buf, len, sess->port_name);
+}
+
+/*
+ * libfc ops involving sessions.
+ */
+
+static int ft_prli_locked(struct fc_rport_priv *rdata, u32 spp_len,
+ const struct fc_els_spp *rspp, struct fc_els_spp *spp)
+{
+ struct ft_tport *tport;
+ struct ft_sess *sess;
+ struct ft_node_acl *acl;
+ u32 fcp_parm;
+
+ tport = ft_tport_create(rdata->local_port);
+ if (!tport)
+ goto not_target; /* not a target for this local port */
+
+ acl = ft_acl_get(tport->tpg, rdata);
+ if (!acl)
+ goto not_target; /* no target for this remote */
+
+ if (!rspp)
+ goto fill;
+
+ if (rspp->spp_flags & (FC_SPP_OPA_VAL | FC_SPP_RPA_VAL))
+ return FC_SPP_RESP_NO_PA;
+
+ /*
+ * If both target and initiator bits are off, the SPP is invalid.
+ */
+ fcp_parm = ntohl(rspp->spp_params);
+ if (!(fcp_parm & (FCP_SPPF_INIT_FCN | FCP_SPPF_TARG_FCN)))
+ return FC_SPP_RESP_INVL;
+
+ /*
+ * Create session (image pair) only if requested by
+ * EST_IMG_PAIR flag and if the requestor is an initiator.
+ */
+ if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR) {
+ spp->spp_flags |= FC_SPP_EST_IMG_PAIR;
+ if (!(fcp_parm & FCP_SPPF_INIT_FCN))
+ return FC_SPP_RESP_CONF;
+ sess = ft_sess_create(tport, rdata->ids.port_id, acl);
+ if (!sess)
+ return FC_SPP_RESP_RES;
+ if (!sess->params)
+ rdata->prli_count++;
+ sess->params = fcp_parm;
+ sess->port_name = rdata->ids.port_name;
+ sess->max_frame = rdata->maxframe_size;
+
+ /* XXX TBD - clearing actions. unit attn, see 4.10 */
+ }
+
+ /*
+ * OR in our service parameters with other provider (initiator), if any.
+ */
+fill:
+ fcp_parm = ntohl(spp->spp_params);
+ fcp_parm &= ~FCP_SPPF_RETRY;
+ spp->spp_params = htonl(fcp_parm | FCP_SPPF_TARG_FCN);
+ return FC_SPP_RESP_ACK;
+
+not_target:
+ fcp_parm = ntohl(spp->spp_params);
+ fcp_parm &= ~FCP_SPPF_TARG_FCN;
+ spp->spp_params = htonl(fcp_parm);
+ return 0;
+}
+
+/**
+ * tcm_fcp_prli() - Handle incoming or outgoing PRLI for the FCP target
+ * @rdata: remote port private
+ * @spp_len: service parameter page length
+ * @rspp: received service parameter page (NULL for outgoing PRLI)
+ * @spp: response service parameter page
+ *
+ * Returns spp response code.
+ */
+static int ft_prli(struct fc_rport_priv *rdata, u32 spp_len,
+ const struct fc_els_spp *rspp, struct fc_els_spp *spp)
+{
+ int ret;
+
+ mutex_lock(&ft_lport_lock);
+ ret = ft_prli_locked(rdata, spp_len, rspp, spp);
+ mutex_unlock(&ft_lport_lock);
+ pr_debug("port_id %x flags %x ret %x\n",
+ rdata->ids.port_id, rspp ? rspp->spp_flags : 0, ret);
+ return ret;
+}
+
+static void ft_sess_rcu_free(struct rcu_head *rcu)
+{
+ struct ft_sess *sess = container_of(rcu, struct ft_sess, rcu);
+
+ kfree(sess);
+}
+
+static void ft_sess_free(struct kref *kref)
+{
+ struct ft_sess *sess = container_of(kref, struct ft_sess, kref);
+
+ transport_deregister_session(sess->se_sess);
+ call_rcu(&sess->rcu, ft_sess_rcu_free);
+}
+
+void ft_sess_put(struct ft_sess *sess)
+{
+ int sess_held = atomic_read(&sess->kref.refcount);
+
+ BUG_ON(!sess_held);
+ kref_put(&sess->kref, ft_sess_free);
+}
+
+static void ft_prlo(struct fc_rport_priv *rdata)
+{
+ struct ft_sess *sess;
+ struct ft_tport *tport;
+
+ mutex_lock(&ft_lport_lock);
+ tport = rcu_dereference(rdata->local_port->prov[FC_TYPE_FCP]);
+ if (!tport) {
+ mutex_unlock(&ft_lport_lock);
+ return;
+ }
+ sess = ft_sess_delete(tport, rdata->ids.port_id);
+ if (!sess) {
+ mutex_unlock(&ft_lport_lock);
+ return;
+ }
+ mutex_unlock(&ft_lport_lock);
+ transport_deregister_session_configfs(sess->se_sess);
+ ft_sess_put(sess); /* release from table */
+ rdata->prli_count--;
+ /* XXX TBD - clearing actions. unit attn, see 4.10 */
+}
+
+/*
+ * Handle incoming FCP request.
+ * Caller has verified that the frame is type FCP.
+ */
+static void ft_recv(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct ft_sess *sess;
+ u32 sid = fc_frame_sid(fp);
+
+ pr_debug("sid %x\n", sid);
+
+ sess = ft_sess_get(lport, sid);
+ if (!sess) {
+ pr_debug("sid %x sess lookup failed\n", sid);
+ /* TBD XXX - if FCP_CMND, send PRLO */
+ fc_frame_free(fp);
+ return;
+ }
+ ft_recv_req(sess, fp); /* must do ft_sess_put() */
+}
+
+/*
+ * Provider ops for libfc.
+ */
+struct fc4_prov ft_prov = {
+ .prli = ft_prli,
+ .prlo = ft_prlo,
+ .recv = ft_recv,
+ .module = THIS_MODULE,
+};