[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/fs/afs/cmservice.c b/ap/os/linux/linux-3.4.x/fs/afs/cmservice.c
new file mode 100644
index 0000000..1c8c6cc
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/afs/cmservice.c
@@ -0,0 +1,585 @@
+/* AFS Cache Manager Service
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/ip.h>
+#include "internal.h"
+#include "afs_cm.h"
+
+#if 0
+struct workqueue_struct *afs_cm_workqueue;
+#endif /* 0 */
+
+static int afs_deliver_cb_init_call_back_state(struct afs_call *,
+ struct sk_buff *, bool);
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
+ struct sk_buff *, bool);
+static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_probe_uuid(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *,
+ struct sk_buff *, bool);
+static void afs_cm_destructor(struct afs_call *);
+
+/*
+ * CB.CallBack operation type
+ */
+static const struct afs_call_type afs_SRXCBCallBack = {
+ .name = "CB.CallBack",
+ .deliver = afs_deliver_cb_callback,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * CB.InitCallBackState operation type
+ */
+static const struct afs_call_type afs_SRXCBInitCallBackState = {
+ .name = "CB.InitCallBackState",
+ .deliver = afs_deliver_cb_init_call_back_state,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * CB.InitCallBackState3 operation type
+ */
+static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
+ .name = "CB.InitCallBackState3",
+ .deliver = afs_deliver_cb_init_call_back_state3,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * CB.Probe operation type
+ */
+static const struct afs_call_type afs_SRXCBProbe = {
+ .name = "CB.Probe",
+ .deliver = afs_deliver_cb_probe,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * CB.ProbeUuid operation type
+ */
+static const struct afs_call_type afs_SRXCBProbeUuid = {
+ .name = "CB.ProbeUuid",
+ .deliver = afs_deliver_cb_probe_uuid,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * CB.TellMeAboutYourself operation type
+ */
+static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
+ .name = "CB.TellMeAboutYourself",
+ .deliver = afs_deliver_cb_tell_me_about_yourself,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
+ * route an incoming cache manager call
+ * - return T if supported, F if not
+ */
+bool afs_cm_incoming_call(struct afs_call *call)
+{
+ u32 operation_id = ntohl(call->operation_ID);
+
+ _enter("{CB.OP %u}", operation_id);
+
+ switch (operation_id) {
+ case CBCallBack:
+ call->type = &afs_SRXCBCallBack;
+ return true;
+ case CBInitCallBackState:
+ call->type = &afs_SRXCBInitCallBackState;
+ return true;
+ case CBInitCallBackState3:
+ call->type = &afs_SRXCBInitCallBackState3;
+ return true;
+ case CBProbe:
+ call->type = &afs_SRXCBProbe;
+ return true;
+ case CBTellMeAboutYourself:
+ call->type = &afs_SRXCBTellMeAboutYourself;
+ return true;
+ default:
+ return false;
+ }
+}
+
+/*
+ * clean up a cache manager call
+ */
+static void afs_cm_destructor(struct afs_call *call)
+{
+ _enter("");
+
+ afs_put_server(call->server);
+ call->server = NULL;
+ kfree(call->buffer);
+ call->buffer = NULL;
+}
+
+/*
+ * allow the fileserver to see if the cache manager is still alive
+ */
+static void SRXAFSCB_CallBack(struct work_struct *work)
+{
+ struct afs_call *call = container_of(work, struct afs_call, work);
+
+ _enter("");
+
+ /* be sure to send the reply *before* attempting to spam the AFS server
+ * with FSFetchStatus requests on the vnodes with broken callbacks lest
+ * the AFS server get into a vicious cycle of trying to break further
+ * callbacks because it hadn't received completion of the CBCallBack op
+ * yet */
+ afs_send_empty_reply(call);
+
+ afs_break_callbacks(call->server, call->count, call->request);
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.CallBack call
+ */
+static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
+ bool last)
+{
+ struct afs_callback *cb;
+ struct afs_server *server;
+ struct in_addr addr;
+ __be32 *bp;
+ u32 tmp;
+ int ret, loop;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ switch (call->unmarshall) {
+ case 0:
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the FID array and its count in two steps */
+ case 1:
+ _debug("extract FID count");
+ ret = afs_extract_data(call, skb, last, &call->tmp, 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ call->count = ntohl(call->tmp);
+ _debug("FID count: %u", call->count);
+ if (call->count > AFSCBMAX)
+ return -EBADMSG;
+
+ call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL);
+ if (!call->buffer)
+ return -ENOMEM;
+ call->offset = 0;
+ call->unmarshall++;
+
+ case 2:
+ _debug("extract FID array");
+ ret = afs_extract_data(call, skb, last, call->buffer,
+ call->count * 3 * 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ _debug("unmarshall FID array");
+ call->request = kcalloc(call->count,
+ sizeof(struct afs_callback),
+ GFP_KERNEL);
+ if (!call->request)
+ return -ENOMEM;
+
+ cb = call->request;
+ bp = call->buffer;
+ for (loop = call->count; loop > 0; loop--, cb++) {
+ cb->fid.vid = ntohl(*bp++);
+ cb->fid.vnode = ntohl(*bp++);
+ cb->fid.unique = ntohl(*bp++);
+ cb->type = AFSCM_CB_UNTYPED;
+ }
+
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the callback array and its count in two steps */
+ case 3:
+ _debug("extract CB count");
+ ret = afs_extract_data(call, skb, last, &call->tmp, 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ tmp = ntohl(call->tmp);
+ _debug("CB count: %u", tmp);
+ if (tmp != call->count && tmp != 0)
+ return -EBADMSG;
+ call->offset = 0;
+ call->unmarshall++;
+ if (tmp == 0)
+ goto empty_cb_array;
+
+ case 4:
+ _debug("extract CB array");
+ ret = afs_extract_data(call, skb, last, call->request,
+ call->count * 3 * 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ _debug("unmarshall CB array");
+ cb = call->request;
+ bp = call->buffer;
+ for (loop = call->count; loop > 0; loop--, cb++) {
+ cb->version = ntohl(*bp++);
+ cb->expiry = ntohl(*bp++);
+ cb->type = ntohl(*bp++);
+ }
+
+ empty_cb_array:
+ call->offset = 0;
+ call->unmarshall++;
+
+ case 5:
+ _debug("trailer");
+ if (skb->len != 0)
+ return -EBADMSG;
+ break;
+ }
+
+ if (!last)
+ return 0;
+
+ call->state = AFS_CALL_REPLYING;
+
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
+
+ INIT_WORK(&call->work, SRXAFSCB_CallBack);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}
+
+/*
+ * allow the fileserver to request callback state (re-)initialisation
+ */
+static void SRXAFSCB_InitCallBackState(struct work_struct *work)
+{
+ struct afs_call *call = container_of(work, struct afs_call, work);
+
+ _enter("{%p}", call->server);
+
+ afs_init_callback_state(call->server);
+ afs_send_empty_reply(call);
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.InitCallBackState call
+ */
+static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
+ struct sk_buff *skb,
+ bool last)
+{
+ struct afs_server *server;
+ struct in_addr addr;
+
+ _enter(",{%u},%d", skb->len, last);
+
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
+
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
+
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
+
+ INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}
+
+/*
+ * deliver request data to a CB.InitCallBackState3 call
+ */
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
+ struct sk_buff *skb,
+ bool last)
+{
+ struct afs_server *server;
+ struct in_addr addr;
+
+ _enter(",{%u},%d", skb->len, last);
+
+ if (!last)
+ return 0;
+
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
+
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
+
+ INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}
+
+/*
+ * allow the fileserver to see if the cache manager is still alive
+ */
+static void SRXAFSCB_Probe(struct work_struct *work)
+{
+ struct afs_call *call = container_of(work, struct afs_call, work);
+
+ _enter("");
+ afs_send_empty_reply(call);
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.Probe call
+ */
+static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
+ bool last)
+{
+ _enter(",{%u},%d", skb->len, last);
+
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
+
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
+
+ INIT_WORK(&call->work, SRXAFSCB_Probe);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}
+
+/*
+ * allow the fileserver to quickly find out if the fileserver has been rebooted
+ */
+static void SRXAFSCB_ProbeUuid(struct work_struct *work)
+{
+ struct afs_call *call = container_of(work, struct afs_call, work);
+ struct afs_uuid *r = call->request;
+
+ struct {
+ __be32 match;
+ } reply;
+
+ _enter("");
+
+
+ if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
+ reply.match = htonl(0);
+ else
+ reply.match = htonl(1);
+
+ afs_send_simple_reply(call, &reply, sizeof(reply));
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.ProbeUuid call
+ */
+static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
+ bool last)
+{
+ struct afs_uuid *r;
+ unsigned loop;
+ __be32 *b;
+ int ret;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
+
+ switch (call->unmarshall) {
+ case 0:
+ call->offset = 0;
+ call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL);
+ if (!call->buffer)
+ return -ENOMEM;
+ call->unmarshall++;
+
+ case 1:
+ _debug("extract UUID");
+ ret = afs_extract_data(call, skb, last, call->buffer,
+ 11 * sizeof(__be32));
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ _debug("unmarshall UUID");
+ call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
+ if (!call->request)
+ return -ENOMEM;
+
+ b = call->buffer;
+ r = call->request;
+ r->time_low = ntohl(b[0]);
+ r->time_mid = ntohl(b[1]);
+ r->time_hi_and_version = ntohl(b[2]);
+ r->clock_seq_hi_and_reserved = ntohl(b[3]);
+ r->clock_seq_low = ntohl(b[4]);
+
+ for (loop = 0; loop < 6; loop++)
+ r->node[loop] = ntohl(b[loop + 5]);
+
+ call->offset = 0;
+ call->unmarshall++;
+
+ case 2:
+ _debug("trailer");
+ if (skb->len != 0)
+ return -EBADMSG;
+ break;
+ }
+
+ if (!last)
+ return 0;
+
+ call->state = AFS_CALL_REPLYING;
+
+ INIT_WORK(&call->work, SRXAFSCB_ProbeUuid);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}
+
+/*
+ * allow the fileserver to ask about the cache manager's capabilities
+ */
+static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
+{
+ struct afs_interface *ifs;
+ struct afs_call *call = container_of(work, struct afs_call, work);
+ int loop, nifs;
+
+ struct {
+ struct /* InterfaceAddr */ {
+ __be32 nifs;
+ __be32 uuid[11];
+ __be32 ifaddr[32];
+ __be32 netmask[32];
+ __be32 mtu[32];
+ } ia;
+ struct /* Capabilities */ {
+ __be32 capcount;
+ __be32 caps[1];
+ } cap;
+ } reply;
+
+ _enter("");
+
+ nifs = 0;
+ ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
+ if (ifs) {
+ nifs = afs_get_ipv4_interfaces(ifs, 32, false);
+ if (nifs < 0) {
+ kfree(ifs);
+ ifs = NULL;
+ nifs = 0;
+ }
+ }
+
+ memset(&reply, 0, sizeof(reply));
+ reply.ia.nifs = htonl(nifs);
+
+ reply.ia.uuid[0] = htonl(afs_uuid.time_low);
+ reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
+ reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
+ reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
+ reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
+ for (loop = 0; loop < 6; loop++)
+ reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
+
+ if (ifs) {
+ for (loop = 0; loop < nifs; loop++) {
+ reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
+ reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
+ reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
+ }
+ kfree(ifs);
+ }
+
+ reply.cap.capcount = htonl(1);
+ reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
+ afs_send_simple_reply(call, &reply, sizeof(reply));
+
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.TellMeAboutYourself call
+ */
+static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ _enter(",{%u},%d", skb->len, last);
+
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
+
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
+
+ INIT_WORK(&call->work, SRXAFSCB_TellMeAboutYourself);
+ queue_work(afs_wq, &call->work);
+ return 0;
+}