zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/tipc/port.c b/ap/os/linux/linux-3.4.x/net/tipc/port.c
new file mode 100644
index 0000000..94d2904
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/tipc/port.c
@@ -0,0 +1,1365 @@
+/*
+ * net/tipc/port.c: TIPC port code
+ *
+ * Copyright (c) 1992-2007, Ericsson AB
+ * Copyright (c) 2004-2008, 2010-2011, Wind River Systems
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "core.h"
+#include "config.h"
+#include "port.h"
+#include "name_table.h"
+
+/* Connection management: */
+#define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
+#define CONFIRMED 0
+#define PROBING 1
+
+#define MAX_REJECT_SIZE 1024
+
+static struct sk_buff *msg_queue_head;
+static struct sk_buff *msg_queue_tail;
+
+DEFINE_SPINLOCK(tipc_port_list_lock);
+static DEFINE_SPINLOCK(queue_lock);
+
+static LIST_HEAD(ports);
+static void port_handle_node_down(unsigned long ref);
+static struct sk_buff *port_build_self_abort_msg(struct tipc_port *, u32 err);
+static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *, u32 err);
+static void port_timeout(unsigned long ref);
+
+
+static u32 port_peernode(struct tipc_port *p_ptr)
+{
+ return msg_destnode(&p_ptr->phdr);
+}
+
+static u32 port_peerport(struct tipc_port *p_ptr)
+{
+ return msg_destport(&p_ptr->phdr);
+}
+
+/**
+ * tipc_multicast - send a multicast message to local and remote destinations
+ */
+
+int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
+ u32 num_sect, struct iovec const *msg_sect,
+ unsigned int total_len)
+{
+ struct tipc_msg *hdr;
+ struct sk_buff *buf;
+ struct sk_buff *ibuf = NULL;
+ struct tipc_port_list dports = {0, NULL, };
+ struct tipc_port *oport = tipc_port_deref(ref);
+ int ext_targets;
+ int res;
+
+ if (unlikely(!oport))
+ return -EINVAL;
+
+ /* Create multicast message */
+
+ hdr = &oport->phdr;
+ msg_set_type(hdr, TIPC_MCAST_MSG);
+ msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
+ msg_set_destport(hdr, 0);
+ msg_set_destnode(hdr, 0);
+ msg_set_nametype(hdr, seq->type);
+ msg_set_namelower(hdr, seq->lower);
+ msg_set_nameupper(hdr, seq->upper);
+ msg_set_hdr_sz(hdr, MCAST_H_SIZE);
+ res = tipc_msg_build(hdr, msg_sect, num_sect, total_len, MAX_MSG_SIZE,
+ !oport->user_port, &buf);
+ if (unlikely(!buf))
+ return res;
+
+ /* Figure out where to send multicast message */
+
+ ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
+ TIPC_NODE_SCOPE, &dports);
+
+ /* Send message to destinations (duplicate it only if necessary) */
+
+ if (ext_targets) {
+ if (dports.count != 0) {
+ ibuf = skb_copy(buf, GFP_ATOMIC);
+ if (ibuf == NULL) {
+ tipc_port_list_free(&dports);
+ kfree_skb(buf);
+ return -ENOMEM;
+ }
+ }
+ res = tipc_bclink_send_msg(buf);
+ if ((res < 0) && (dports.count != 0))
+ kfree_skb(ibuf);
+ } else {
+ ibuf = buf;
+ }
+
+ if (res >= 0) {
+ if (ibuf)
+ tipc_port_recv_mcast(ibuf, &dports);
+ } else {
+ tipc_port_list_free(&dports);
+ }
+ return res;
+}
+
+/**
+ * tipc_port_recv_mcast - deliver multicast message to all destination ports
+ *
+ * If there is no port list, perform a lookup to create one
+ */
+
+void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp)
+{
+ struct tipc_msg *msg;
+ struct tipc_port_list dports = {0, NULL, };
+ struct tipc_port_list *item = dp;
+ int cnt = 0;
+
+ msg = buf_msg(buf);
+
+ /* Create destination port list, if one wasn't supplied */
+
+ if (dp == NULL) {
+ tipc_nametbl_mc_translate(msg_nametype(msg),
+ msg_namelower(msg),
+ msg_nameupper(msg),
+ TIPC_CLUSTER_SCOPE,
+ &dports);
+ item = dp = &dports;
+ }
+
+ /* Deliver a copy of message to each destination port */
+
+ if (dp->count != 0) {
+ msg_set_destnode(msg, tipc_own_addr);
+ if (dp->count == 1) {
+ msg_set_destport(msg, dp->ports[0]);
+ tipc_port_recv_msg(buf);
+ tipc_port_list_free(dp);
+ return;
+ }
+ for (; cnt < dp->count; cnt++) {
+ int index = cnt % PLSIZE;
+ struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
+
+ if (b == NULL) {
+ warn("Unable to deliver multicast message(s)\n");
+ goto exit;
+ }
+ if ((index == 0) && (cnt != 0))
+ item = item->next;
+ msg_set_destport(buf_msg(b), item->ports[index]);
+ tipc_port_recv_msg(b);
+ }
+ }
+exit:
+ kfree_skb(buf);
+ tipc_port_list_free(dp);
+}
+
+/**
+ * tipc_createport_raw - create a generic TIPC port
+ *
+ * Returns pointer to (locked) TIPC port, or NULL if unable to create it
+ */
+
+struct tipc_port *tipc_createport_raw(void *usr_handle,
+ u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
+ void (*wakeup)(struct tipc_port *),
+ const u32 importance)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+ u32 ref;
+
+ p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
+ if (!p_ptr) {
+ warn("Port creation failed, no memory\n");
+ return NULL;
+ }
+ ref = tipc_ref_acquire(p_ptr, &p_ptr->lock);
+ if (!ref) {
+ warn("Port creation failed, reference table exhausted\n");
+ kfree(p_ptr);
+ return NULL;
+ }
+
+ p_ptr->usr_handle = usr_handle;
+ p_ptr->max_pkt = MAX_PKT_DEFAULT;
+ p_ptr->ref = ref;
+ msg = &p_ptr->phdr;
+ tipc_msg_init(msg, importance, TIPC_NAMED_MSG, NAMED_H_SIZE, 0);
+ msg_set_origport(msg, ref);
+ INIT_LIST_HEAD(&p_ptr->wait_list);
+ INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
+ p_ptr->dispatcher = dispatcher;
+ p_ptr->wakeup = wakeup;
+ p_ptr->user_port = NULL;
+ k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
+ spin_lock_bh(&tipc_port_list_lock);
+ INIT_LIST_HEAD(&p_ptr->publications);
+ INIT_LIST_HEAD(&p_ptr->port_list);
+ list_add_tail(&p_ptr->port_list, &ports);
+ spin_unlock_bh(&tipc_port_list_lock);
+ return p_ptr;
+}
+
+int tipc_deleteport(u32 ref)
+{
+ struct tipc_port *p_ptr;
+ struct sk_buff *buf = NULL;
+
+ tipc_withdraw(ref, 0, NULL);
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+
+ tipc_ref_discard(ref);
+ tipc_port_unlock(p_ptr);
+
+ k_cancel_timer(&p_ptr->timer);
+ if (p_ptr->connected) {
+ buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
+ tipc_nodesub_unsubscribe(&p_ptr->subscription);
+ }
+ kfree(p_ptr->user_port);
+
+ spin_lock_bh(&tipc_port_list_lock);
+ list_del(&p_ptr->port_list);
+ list_del(&p_ptr->wait_list);
+ spin_unlock_bh(&tipc_port_list_lock);
+ k_term_timer(&p_ptr->timer);
+ kfree(p_ptr);
+ tipc_net_route_msg(buf);
+ return 0;
+}
+
+static int port_unreliable(struct tipc_port *p_ptr)
+{
+ return msg_src_droppable(&p_ptr->phdr);
+}
+
+int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
+{
+ struct tipc_port *p_ptr;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ *isunreliable = port_unreliable(p_ptr);
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
+{
+ struct tipc_port *p_ptr;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ msg_set_src_droppable(&p_ptr->phdr, (isunreliable != 0));
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+static int port_unreturnable(struct tipc_port *p_ptr)
+{
+ return msg_dest_droppable(&p_ptr->phdr);
+}
+
+int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
+{
+ struct tipc_port *p_ptr;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ *isunrejectable = port_unreturnable(p_ptr);
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
+{
+ struct tipc_port *p_ptr;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ msg_set_dest_droppable(&p_ptr->phdr, (isunrejectable != 0));
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+/*
+ * port_build_proto_msg(): create connection protocol message for port
+ *
+ * On entry the port must be locked and connected.
+ */
+static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
+ u32 type, u32 ack)
+{
+ struct sk_buff *buf;
+ struct tipc_msg *msg;
+
+ buf = tipc_buf_acquire(INT_H_SIZE);
+ if (buf) {
+ msg = buf_msg(buf);
+ tipc_msg_init(msg, CONN_MANAGER, type, INT_H_SIZE,
+ port_peernode(p_ptr));
+ msg_set_destport(msg, port_peerport(p_ptr));
+ msg_set_origport(msg, p_ptr->ref);
+ msg_set_msgcnt(msg, ack);
+ }
+ return buf;
+}
+
+int tipc_reject_msg(struct sk_buff *buf, u32 err)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ struct sk_buff *rbuf;
+ struct tipc_msg *rmsg;
+ int hdr_sz;
+ u32 imp;
+ u32 data_sz = msg_data_sz(msg);
+ u32 src_node;
+ u32 rmsg_sz;
+
+ /* discard rejected message if it shouldn't be returned to sender */
+
+ if (WARN(!msg_isdata(msg),
+ "attempt to reject message with user=%u", msg_user(msg))) {
+ dump_stack();
+ goto exit;
+ }
+ if (msg_errcode(msg) || msg_dest_droppable(msg))
+ goto exit;
+
+ /*
+ * construct returned message by copying rejected message header and
+ * data (or subset), then updating header fields that need adjusting
+ */
+
+ hdr_sz = msg_hdr_sz(msg);
+ rmsg_sz = hdr_sz + min_t(u32, data_sz, MAX_REJECT_SIZE);
+
+ rbuf = tipc_buf_acquire(rmsg_sz);
+ if (rbuf == NULL)
+ goto exit;
+
+ rmsg = buf_msg(rbuf);
+ skb_copy_to_linear_data(rbuf, msg, rmsg_sz);
+
+ if (msg_connected(rmsg)) {
+ imp = msg_importance(rmsg);
+ if (imp < TIPC_CRITICAL_IMPORTANCE)
+ msg_set_importance(rmsg, ++imp);
+ }
+ msg_set_non_seq(rmsg, 0);
+ msg_set_size(rmsg, rmsg_sz);
+ msg_set_errcode(rmsg, err);
+ msg_set_prevnode(rmsg, tipc_own_addr);
+ msg_swap_words(rmsg, 4, 5);
+ if (!msg_short(rmsg))
+ msg_swap_words(rmsg, 6, 7);
+
+ /* send self-abort message when rejecting on a connected port */
+ if (msg_connected(msg)) {
+ struct tipc_port *p_ptr = tipc_port_lock(msg_destport(msg));
+
+ if (p_ptr) {
+ struct sk_buff *abuf = NULL;
+
+ if (p_ptr->connected)
+ abuf = port_build_self_abort_msg(p_ptr, err);
+ tipc_port_unlock(p_ptr);
+ tipc_net_route_msg(abuf);
+ }
+ }
+
+ /* send returned message & dispose of rejected message */
+
+ src_node = msg_prevnode(msg);
+ if (src_node == tipc_own_addr)
+ tipc_port_recv_msg(rbuf);
+ else
+ tipc_link_send(rbuf, src_node, msg_link_selector(rmsg));
+exit:
+ kfree_skb(buf);
+ return data_sz;
+}
+
+int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr,
+ struct iovec const *msg_sect, u32 num_sect,
+ unsigned int total_len, int err)
+{
+ struct sk_buff *buf;
+ int res;
+
+ res = tipc_msg_build(hdr, msg_sect, num_sect, total_len, MAX_MSG_SIZE,
+ !p_ptr->user_port, &buf);
+ if (!buf)
+ return res;
+
+ return tipc_reject_msg(buf, err);
+}
+
+static void port_timeout(unsigned long ref)
+{
+ struct tipc_port *p_ptr = tipc_port_lock(ref);
+ struct sk_buff *buf = NULL;
+
+ if (!p_ptr)
+ return;
+
+ if (!p_ptr->connected) {
+ tipc_port_unlock(p_ptr);
+ return;
+ }
+
+ /* Last probe answered ? */
+ if (p_ptr->probing_state == PROBING) {
+ buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
+ } else {
+ buf = port_build_proto_msg(p_ptr, CONN_PROBE, 0);
+ p_ptr->probing_state = PROBING;
+ k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
+ }
+ tipc_port_unlock(p_ptr);
+ tipc_net_route_msg(buf);
+}
+
+
+static void port_handle_node_down(unsigned long ref)
+{
+ struct tipc_port *p_ptr = tipc_port_lock(ref);
+ struct sk_buff *buf = NULL;
+
+ if (!p_ptr)
+ return;
+ buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
+ tipc_port_unlock(p_ptr);
+ tipc_net_route_msg(buf);
+}
+
+
+static struct sk_buff *port_build_self_abort_msg(struct tipc_port *p_ptr, u32 err)
+{
+ struct sk_buff *buf = port_build_peer_abort_msg(p_ptr, err);
+
+ if (buf) {
+ struct tipc_msg *msg = buf_msg(buf);
+ msg_swap_words(msg, 4, 5);
+ msg_swap_words(msg, 6, 7);
+ }
+ return buf;
+}
+
+
+static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *p_ptr, u32 err)
+{
+ struct sk_buff *buf;
+ struct tipc_msg *msg;
+ u32 imp;
+
+ if (!p_ptr->connected)
+ return NULL;
+
+ buf = tipc_buf_acquire(BASIC_H_SIZE);
+ if (buf) {
+ msg = buf_msg(buf);
+ memcpy(msg, &p_ptr->phdr, BASIC_H_SIZE);
+ msg_set_hdr_sz(msg, BASIC_H_SIZE);
+ msg_set_size(msg, BASIC_H_SIZE);
+ imp = msg_importance(msg);
+ if (imp < TIPC_CRITICAL_IMPORTANCE)
+ msg_set_importance(msg, ++imp);
+ msg_set_errcode(msg, err);
+ }
+ return buf;
+}
+
+void tipc_port_recv_proto_msg(struct sk_buff *buf)
+{
+ struct tipc_msg *msg = buf_msg(buf);
+ struct tipc_port *p_ptr;
+ struct sk_buff *r_buf = NULL;
+ u32 orignode = msg_orignode(msg);
+ u32 origport = msg_origport(msg);
+ u32 destport = msg_destport(msg);
+ int wakeable;
+
+ /* Validate connection */
+
+ p_ptr = tipc_port_lock(destport);
+ if (!p_ptr || !p_ptr->connected ||
+ (port_peernode(p_ptr) != orignode) ||
+ (port_peerport(p_ptr) != origport)) {
+ r_buf = tipc_buf_acquire(BASIC_H_SIZE);
+ if (r_buf) {
+ msg = buf_msg(r_buf);
+ tipc_msg_init(msg, TIPC_HIGH_IMPORTANCE, TIPC_CONN_MSG,
+ BASIC_H_SIZE, orignode);
+ msg_set_errcode(msg, TIPC_ERR_NO_PORT);
+ msg_set_origport(msg, destport);
+ msg_set_destport(msg, origport);
+ }
+ if (p_ptr)
+ tipc_port_unlock(p_ptr);
+ goto exit;
+ }
+
+ /* Process protocol message sent by peer */
+
+ switch (msg_type(msg)) {
+ case CONN_ACK:
+ wakeable = tipc_port_congested(p_ptr) && p_ptr->congested &&
+ p_ptr->wakeup;
+ p_ptr->acked += msg_msgcnt(msg);
+ if (!tipc_port_congested(p_ptr)) {
+ p_ptr->congested = 0;
+ if (wakeable)
+ p_ptr->wakeup(p_ptr);
+ }
+ break;
+ case CONN_PROBE:
+ r_buf = port_build_proto_msg(p_ptr, CONN_PROBE_REPLY, 0);
+ break;
+ default:
+ /* CONN_PROBE_REPLY or unrecognized - no action required */
+ break;
+ }
+ p_ptr->probing_state = CONFIRMED;
+ tipc_port_unlock(p_ptr);
+exit:
+ tipc_net_route_msg(r_buf);
+ kfree_skb(buf);
+}
+
+static void port_print(struct tipc_port *p_ptr, struct print_buf *buf, int full_id)
+{
+ struct publication *publ;
+
+ if (full_id)
+ tipc_printf(buf, "<%u.%u.%u:%u>:",
+ tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
+ tipc_node(tipc_own_addr), p_ptr->ref);
+ else
+ tipc_printf(buf, "%-10u:", p_ptr->ref);
+
+ if (p_ptr->connected) {
+ u32 dport = port_peerport(p_ptr);
+ u32 destnode = port_peernode(p_ptr);
+
+ tipc_printf(buf, " connected to <%u.%u.%u:%u>",
+ tipc_zone(destnode), tipc_cluster(destnode),
+ tipc_node(destnode), dport);
+ if (p_ptr->conn_type != 0)
+ tipc_printf(buf, " via {%u,%u}",
+ p_ptr->conn_type,
+ p_ptr->conn_instance);
+ } else if (p_ptr->published) {
+ tipc_printf(buf, " bound to");
+ list_for_each_entry(publ, &p_ptr->publications, pport_list) {
+ if (publ->lower == publ->upper)
+ tipc_printf(buf, " {%u,%u}", publ->type,
+ publ->lower);
+ else
+ tipc_printf(buf, " {%u,%u,%u}", publ->type,
+ publ->lower, publ->upper);
+ }
+ }
+ tipc_printf(buf, "\n");
+}
+
+#define MAX_PORT_QUERY 32768
+
+struct sk_buff *tipc_port_get_ports(void)
+{
+ struct sk_buff *buf;
+ struct tlv_desc *rep_tlv;
+ struct print_buf pb;
+ struct tipc_port *p_ptr;
+ int str_len;
+
+ buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
+ if (!buf)
+ return NULL;
+ rep_tlv = (struct tlv_desc *)buf->data;
+
+ tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
+ spin_lock_bh(&tipc_port_list_lock);
+ list_for_each_entry(p_ptr, &ports, port_list) {
+ spin_lock_bh(p_ptr->lock);
+ port_print(p_ptr, &pb, 0);
+ spin_unlock_bh(p_ptr->lock);
+ }
+ spin_unlock_bh(&tipc_port_list_lock);
+ str_len = tipc_printbuf_validate(&pb);
+
+ skb_put(buf, TLV_SPACE(str_len));
+ TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
+
+ return buf;
+}
+
+void tipc_port_reinit(void)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+
+ spin_lock_bh(&tipc_port_list_lock);
+ list_for_each_entry(p_ptr, &ports, port_list) {
+ msg = &p_ptr->phdr;
+ if (msg_orignode(msg) == tipc_own_addr)
+ break;
+ msg_set_prevnode(msg, tipc_own_addr);
+ msg_set_orignode(msg, tipc_own_addr);
+ }
+ spin_unlock_bh(&tipc_port_list_lock);
+}
+
+
+/*
+ * port_dispatcher_sigh(): Signal handler for messages destinated
+ * to the tipc_port interface.
+ */
+
+static void port_dispatcher_sigh(void *dummy)
+{
+ struct sk_buff *buf;
+
+ spin_lock_bh(&queue_lock);
+ buf = msg_queue_head;
+ msg_queue_head = NULL;
+ spin_unlock_bh(&queue_lock);
+
+ while (buf) {
+ struct tipc_port *p_ptr;
+ struct user_port *up_ptr;
+ struct tipc_portid orig;
+ struct tipc_name_seq dseq;
+ void *usr_handle;
+ int connected;
+ int published;
+ u32 message_type;
+
+ struct sk_buff *next = buf->next;
+ struct tipc_msg *msg = buf_msg(buf);
+ u32 dref = msg_destport(msg);
+
+ message_type = msg_type(msg);
+ if (message_type > TIPC_DIRECT_MSG)
+ goto reject; /* Unsupported message type */
+
+ p_ptr = tipc_port_lock(dref);
+ if (!p_ptr)
+ goto reject; /* Port deleted while msg in queue */
+
+ orig.ref = msg_origport(msg);
+ orig.node = msg_orignode(msg);
+ up_ptr = p_ptr->user_port;
+ usr_handle = up_ptr->usr_handle;
+ connected = p_ptr->connected;
+ published = p_ptr->published;
+
+ if (unlikely(msg_errcode(msg)))
+ goto err;
+
+ switch (message_type) {
+
+ case TIPC_CONN_MSG:{
+ tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
+ u32 peer_port = port_peerport(p_ptr);
+ u32 peer_node = port_peernode(p_ptr);
+ u32 dsz;
+
+ tipc_port_unlock(p_ptr);
+ if (unlikely(!cb))
+ goto reject;
+ if (unlikely(!connected)) {
+ if (tipc_connect2port(dref, &orig))
+ goto reject;
+ } else if ((msg_origport(msg) != peer_port) ||
+ (msg_orignode(msg) != peer_node))
+ goto reject;
+ dsz = msg_data_sz(msg);
+ if (unlikely(dsz &&
+ (++p_ptr->conn_unacked >=
+ TIPC_FLOW_CONTROL_WIN)))
+ tipc_acknowledge(dref,
+ p_ptr->conn_unacked);
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg), dsz);
+ break;
+ }
+ case TIPC_DIRECT_MSG:{
+ tipc_msg_event cb = up_ptr->msg_cb;
+
+ tipc_port_unlock(p_ptr);
+ if (unlikely(!cb || connected))
+ goto reject;
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg),
+ msg_data_sz(msg), msg_importance(msg),
+ &orig);
+ break;
+ }
+ case TIPC_MCAST_MSG:
+ case TIPC_NAMED_MSG:{
+ tipc_named_msg_event cb = up_ptr->named_msg_cb;
+
+ tipc_port_unlock(p_ptr);
+ if (unlikely(!cb || connected || !published))
+ goto reject;
+ dseq.type = msg_nametype(msg);
+ dseq.lower = msg_nameinst(msg);
+ dseq.upper = (message_type == TIPC_NAMED_MSG)
+ ? dseq.lower : msg_nameupper(msg);
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg),
+ msg_data_sz(msg), msg_importance(msg),
+ &orig, &dseq);
+ break;
+ }
+ }
+ if (buf)
+ kfree_skb(buf);
+ buf = next;
+ continue;
+err:
+ switch (message_type) {
+
+ case TIPC_CONN_MSG:{
+ tipc_conn_shutdown_event cb =
+ up_ptr->conn_err_cb;
+ u32 peer_port = port_peerport(p_ptr);
+ u32 peer_node = port_peernode(p_ptr);
+
+ tipc_port_unlock(p_ptr);
+ if (!cb || !connected)
+ break;
+ if ((msg_origport(msg) != peer_port) ||
+ (msg_orignode(msg) != peer_node))
+ break;
+ tipc_disconnect(dref);
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg),
+ msg_data_sz(msg), msg_errcode(msg));
+ break;
+ }
+ case TIPC_DIRECT_MSG:{
+ tipc_msg_err_event cb = up_ptr->err_cb;
+
+ tipc_port_unlock(p_ptr);
+ if (!cb || connected)
+ break;
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg),
+ msg_data_sz(msg), msg_errcode(msg), &orig);
+ break;
+ }
+ case TIPC_MCAST_MSG:
+ case TIPC_NAMED_MSG:{
+ tipc_named_msg_err_event cb =
+ up_ptr->named_err_cb;
+
+ tipc_port_unlock(p_ptr);
+ if (!cb || connected)
+ break;
+ dseq.type = msg_nametype(msg);
+ dseq.lower = msg_nameinst(msg);
+ dseq.upper = (message_type == TIPC_NAMED_MSG)
+ ? dseq.lower : msg_nameupper(msg);
+ skb_pull(buf, msg_hdr_sz(msg));
+ cb(usr_handle, dref, &buf, msg_data(msg),
+ msg_data_sz(msg), msg_errcode(msg), &dseq);
+ break;
+ }
+ }
+ if (buf)
+ kfree_skb(buf);
+ buf = next;
+ continue;
+reject:
+ tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
+ buf = next;
+ }
+}
+
+/*
+ * port_dispatcher(): Dispatcher for messages destinated
+ * to the tipc_port interface. Called with port locked.
+ */
+
+static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
+{
+ buf->next = NULL;
+ spin_lock_bh(&queue_lock);
+ if (msg_queue_head) {
+ msg_queue_tail->next = buf;
+ msg_queue_tail = buf;
+ } else {
+ msg_queue_tail = msg_queue_head = buf;
+ tipc_k_signal((Handler)port_dispatcher_sigh, 0);
+ }
+ spin_unlock_bh(&queue_lock);
+ return 0;
+}
+
+/*
+ * Wake up port after congestion: Called with port locked,
+ *
+ */
+
+static void port_wakeup_sh(unsigned long ref)
+{
+ struct tipc_port *p_ptr;
+ struct user_port *up_ptr;
+ tipc_continue_event cb = NULL;
+ void *uh = NULL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (p_ptr) {
+ up_ptr = p_ptr->user_port;
+ if (up_ptr) {
+ cb = up_ptr->continue_event_cb;
+ uh = up_ptr->usr_handle;
+ }
+ tipc_port_unlock(p_ptr);
+ }
+ if (cb)
+ cb(uh, ref);
+}
+
+
+static void port_wakeup(struct tipc_port *p_ptr)
+{
+ tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
+}
+
+void tipc_acknowledge(u32 ref, u32 ack)
+{
+ struct tipc_port *p_ptr;
+ struct sk_buff *buf = NULL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return;
+ if (p_ptr->connected) {
+ p_ptr->conn_unacked -= ack;
+ buf = port_build_proto_msg(p_ptr, CONN_ACK, ack);
+ }
+ tipc_port_unlock(p_ptr);
+ tipc_net_route_msg(buf);
+}
+
+/*
+ * tipc_createport(): user level call.
+ */
+
+int tipc_createport(void *usr_handle,
+ unsigned int importance,
+ tipc_msg_err_event error_cb,
+ tipc_named_msg_err_event named_error_cb,
+ tipc_conn_shutdown_event conn_error_cb,
+ tipc_msg_event msg_cb,
+ tipc_named_msg_event named_msg_cb,
+ tipc_conn_msg_event conn_msg_cb,
+ tipc_continue_event continue_event_cb,/* May be zero */
+ u32 *portref)
+{
+ struct user_port *up_ptr;
+ struct tipc_port *p_ptr;
+
+ up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
+ if (!up_ptr) {
+ warn("Port creation failed, no memory\n");
+ return -ENOMEM;
+ }
+ p_ptr = (struct tipc_port *)tipc_createport_raw(NULL, port_dispatcher,
+ port_wakeup, importance);
+ if (!p_ptr) {
+ kfree(up_ptr);
+ return -ENOMEM;
+ }
+
+ p_ptr->user_port = up_ptr;
+ up_ptr->usr_handle = usr_handle;
+ up_ptr->ref = p_ptr->ref;
+ up_ptr->err_cb = error_cb;
+ up_ptr->named_err_cb = named_error_cb;
+ up_ptr->conn_err_cb = conn_error_cb;
+ up_ptr->msg_cb = msg_cb;
+ up_ptr->named_msg_cb = named_msg_cb;
+ up_ptr->conn_msg_cb = conn_msg_cb;
+ up_ptr->continue_event_cb = continue_event_cb;
+ *portref = p_ptr->ref;
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+int tipc_portimportance(u32 ref, unsigned int *importance)
+{
+ struct tipc_port *p_ptr;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ *importance = (unsigned int)msg_importance(&p_ptr->phdr);
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+int tipc_set_portimportance(u32 ref, unsigned int imp)
+{
+ struct tipc_port *p_ptr;
+
+ if (imp > TIPC_CRITICAL_IMPORTANCE)
+ return -EINVAL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ msg_set_importance(&p_ptr->phdr, (u32)imp);
+ tipc_port_unlock(p_ptr);
+ return 0;
+}
+
+
+int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
+{
+ struct tipc_port *p_ptr;
+ struct publication *publ;
+ u32 key;
+ int res = -EINVAL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+
+ if (p_ptr->connected)
+ goto exit;
+ if (seq->lower > seq->upper)
+ goto exit;
+ if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
+ goto exit;
+ key = ref + p_ptr->pub_count + 1;
+ if (key == ref) {
+ res = -EADDRINUSE;
+ goto exit;
+ }
+ publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
+ scope, p_ptr->ref, key);
+ if (publ) {
+ list_add(&publ->pport_list, &p_ptr->publications);
+ p_ptr->pub_count++;
+ p_ptr->published = 1;
+ res = 0;
+ }
+exit:
+ tipc_port_unlock(p_ptr);
+ return res;
+}
+
+int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
+{
+ struct tipc_port *p_ptr;
+ struct publication *publ;
+ struct publication *tpubl;
+ int res = -EINVAL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ if (!seq) {
+ list_for_each_entry_safe(publ, tpubl,
+ &p_ptr->publications, pport_list) {
+ tipc_nametbl_withdraw(publ->type, publ->lower,
+ publ->ref, publ->key);
+ }
+ res = 0;
+ } else {
+ list_for_each_entry_safe(publ, tpubl,
+ &p_ptr->publications, pport_list) {
+ if (publ->scope != scope)
+ continue;
+ if (publ->type != seq->type)
+ continue;
+ if (publ->lower != seq->lower)
+ continue;
+ if (publ->upper != seq->upper)
+ break;
+ tipc_nametbl_withdraw(publ->type, publ->lower,
+ publ->ref, publ->key);
+ res = 0;
+ break;
+ }
+ }
+ if (list_empty(&p_ptr->publications))
+ p_ptr->published = 0;
+ tipc_port_unlock(p_ptr);
+ return res;
+}
+
+int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+ int res = -EINVAL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ if (p_ptr->published || p_ptr->connected)
+ goto exit;
+ if (!peer->ref)
+ goto exit;
+
+ msg = &p_ptr->phdr;
+ msg_set_destnode(msg, peer->node);
+ msg_set_destport(msg, peer->ref);
+ msg_set_type(msg, TIPC_CONN_MSG);
+ msg_set_lookup_scope(msg, 0);
+ msg_set_hdr_sz(msg, SHORT_H_SIZE);
+
+ p_ptr->probing_interval = PROBING_INTERVAL;
+ p_ptr->probing_state = CONFIRMED;
+ p_ptr->connected = 1;
+ k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
+
+ tipc_nodesub_subscribe(&p_ptr->subscription, peer->node,
+ (void *)(unsigned long)ref,
+ (net_ev_handler)port_handle_node_down);
+ res = 0;
+exit:
+ tipc_port_unlock(p_ptr);
+ p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
+ return res;
+}
+
+/**
+ * tipc_disconnect_port - disconnect port from peer
+ *
+ * Port must be locked.
+ */
+
+int tipc_disconnect_port(struct tipc_port *tp_ptr)
+{
+ int res;
+
+ if (tp_ptr->connected) {
+ tp_ptr->connected = 0;
+ /* let timer expire on it's own to avoid deadlock! */
+ tipc_nodesub_unsubscribe(
+ &((struct tipc_port *)tp_ptr)->subscription);
+ res = 0;
+ } else {
+ res = -ENOTCONN;
+ }
+ return res;
+}
+
+/*
+ * tipc_disconnect(): Disconnect port form peer.
+ * This is a node local operation.
+ */
+
+int tipc_disconnect(u32 ref)
+{
+ struct tipc_port *p_ptr;
+ int res;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+ res = tipc_disconnect_port((struct tipc_port *)p_ptr);
+ tipc_port_unlock(p_ptr);
+ return res;
+}
+
+/*
+ * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
+ */
+int tipc_shutdown(u32 ref)
+{
+ struct tipc_port *p_ptr;
+ struct sk_buff *buf = NULL;
+
+ p_ptr = tipc_port_lock(ref);
+ if (!p_ptr)
+ return -EINVAL;
+
+ buf = port_build_peer_abort_msg(p_ptr, TIPC_CONN_SHUTDOWN);
+ tipc_port_unlock(p_ptr);
+ tipc_net_route_msg(buf);
+ return tipc_disconnect(ref);
+}
+
+/**
+ * tipc_port_recv_msg - receive message from lower layer and deliver to port user
+ */
+
+int tipc_port_recv_msg(struct sk_buff *buf)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg = buf_msg(buf);
+ u32 destport = msg_destport(msg);
+ u32 dsz = msg_data_sz(msg);
+ u32 err;
+
+ /* forward unresolved named message */
+ if (unlikely(!destport)) {
+ tipc_net_route_msg(buf);
+ return dsz;
+ }
+
+ /* validate destination & pass to port, otherwise reject message */
+ p_ptr = tipc_port_lock(destport);
+ if (likely(p_ptr)) {
+ if (likely(p_ptr->connected)) {
+ if ((unlikely(msg_origport(msg) !=
+ tipc_peer_port(p_ptr))) ||
+ (unlikely(msg_orignode(msg) !=
+ tipc_peer_node(p_ptr))) ||
+ (unlikely(!msg_connected(msg)))) {
+ err = TIPC_ERR_NO_PORT;
+ tipc_port_unlock(p_ptr);
+ goto reject;
+ }
+ }
+ err = p_ptr->dispatcher(p_ptr, buf);
+ tipc_port_unlock(p_ptr);
+ if (likely(!err))
+ return dsz;
+ } else {
+ err = TIPC_ERR_NO_PORT;
+ }
+reject:
+ return tipc_reject_msg(buf, err);
+}
+
+/*
+ * tipc_port_recv_sections(): Concatenate and deliver sectioned
+ * message for this node.
+ */
+
+static int tipc_port_recv_sections(struct tipc_port *sender, unsigned int num_sect,
+ struct iovec const *msg_sect,
+ unsigned int total_len)
+{
+ struct sk_buff *buf;
+ int res;
+
+ res = tipc_msg_build(&sender->phdr, msg_sect, num_sect, total_len,
+ MAX_MSG_SIZE, !sender->user_port, &buf);
+ if (likely(buf))
+ tipc_port_recv_msg(buf);
+ return res;
+}
+
+/**
+ * tipc_send - send message sections on connection
+ */
+
+int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect,
+ unsigned int total_len)
+{
+ struct tipc_port *p_ptr;
+ u32 destnode;
+ int res;
+
+ p_ptr = tipc_port_deref(ref);
+ if (!p_ptr || !p_ptr->connected)
+ return -EINVAL;
+
+ p_ptr->congested = 1;
+ if (!tipc_port_congested(p_ptr)) {
+ destnode = port_peernode(p_ptr);
+ if (likely(destnode != tipc_own_addr))
+ res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
+ total_len, destnode);
+ else
+ res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect,
+ total_len);
+
+ if (likely(res != -ELINKCONG)) {
+ p_ptr->congested = 0;
+ if (res > 0)
+ p_ptr->sent++;
+ return res;
+ }
+ }
+ if (port_unreliable(p_ptr)) {
+ p_ptr->congested = 0;
+ return total_len;
+ }
+ return -ELINKCONG;
+}
+
+/**
+ * tipc_send2name - send message sections to port name
+ */
+
+int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
+ unsigned int num_sect, struct iovec const *msg_sect,
+ unsigned int total_len)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+ u32 destnode = domain;
+ u32 destport;
+ int res;
+
+ p_ptr = tipc_port_deref(ref);
+ if (!p_ptr || p_ptr->connected)
+ return -EINVAL;
+
+ msg = &p_ptr->phdr;
+ msg_set_type(msg, TIPC_NAMED_MSG);
+ msg_set_hdr_sz(msg, NAMED_H_SIZE);
+ msg_set_nametype(msg, name->type);
+ msg_set_nameinst(msg, name->instance);
+ msg_set_lookup_scope(msg, tipc_addr_scope(domain));
+ destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
+ msg_set_destnode(msg, destnode);
+ msg_set_destport(msg, destport);
+
+ if (likely(destport || destnode)) {
+ if (likely(destnode == tipc_own_addr))
+ res = tipc_port_recv_sections(p_ptr, num_sect,
+ msg_sect, total_len);
+ else
+ res = tipc_link_send_sections_fast(p_ptr, msg_sect,
+ num_sect, total_len,
+ destnode);
+ if (likely(res != -ELINKCONG)) {
+ if (res > 0)
+ p_ptr->sent++;
+ return res;
+ }
+ if (port_unreliable(p_ptr)) {
+ return total_len;
+ }
+ return -ELINKCONG;
+ }
+ return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
+ total_len, TIPC_ERR_NO_NAME);
+}
+
+/**
+ * tipc_send2port - send message sections to port identity
+ */
+
+int tipc_send2port(u32 ref, struct tipc_portid const *dest,
+ unsigned int num_sect, struct iovec const *msg_sect,
+ unsigned int total_len)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+ int res;
+
+ p_ptr = tipc_port_deref(ref);
+ if (!p_ptr || p_ptr->connected)
+ return -EINVAL;
+
+ msg = &p_ptr->phdr;
+ msg_set_type(msg, TIPC_DIRECT_MSG);
+ msg_set_lookup_scope(msg, 0);
+ msg_set_destnode(msg, dest->node);
+ msg_set_destport(msg, dest->ref);
+ msg_set_hdr_sz(msg, BASIC_H_SIZE);
+
+ if (dest->node == tipc_own_addr)
+ res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect,
+ total_len);
+ else
+ res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
+ total_len, dest->node);
+ if (likely(res != -ELINKCONG)) {
+ if (res > 0)
+ p_ptr->sent++;
+ return res;
+ }
+ if (port_unreliable(p_ptr)) {
+ return total_len;
+ }
+ return -ELINKCONG;
+}
+
+/**
+ * tipc_send_buf2port - send message buffer to port identity
+ */
+
+int tipc_send_buf2port(u32 ref, struct tipc_portid const *dest,
+ struct sk_buff *buf, unsigned int dsz)
+{
+ struct tipc_port *p_ptr;
+ struct tipc_msg *msg;
+ int res;
+
+ p_ptr = (struct tipc_port *)tipc_ref_deref(ref);
+ if (!p_ptr || p_ptr->connected)
+ return -EINVAL;
+
+ msg = &p_ptr->phdr;
+ msg_set_type(msg, TIPC_DIRECT_MSG);
+ msg_set_destnode(msg, dest->node);
+ msg_set_destport(msg, dest->ref);
+ msg_set_hdr_sz(msg, BASIC_H_SIZE);
+ msg_set_size(msg, BASIC_H_SIZE + dsz);
+ if (skb_cow(buf, BASIC_H_SIZE))
+ return -ENOMEM;
+
+ skb_push(buf, BASIC_H_SIZE);
+ skb_copy_to_linear_data(buf, msg, BASIC_H_SIZE);
+
+ if (dest->node == tipc_own_addr)
+ res = tipc_port_recv_msg(buf);
+ else
+ res = tipc_send_buf_fast(buf, dest->node);
+ if (likely(res != -ELINKCONG)) {
+ if (res > 0)
+ p_ptr->sent++;
+ return res;
+ }
+ if (port_unreliable(p_ptr))
+ return dsz;
+ return -ELINKCONG;
+}
+