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-rw-r--r--fs/afs/cmservice.c67
1 files changed, 21 insertions, 46 deletions
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 357de908df3a..c332c95a6940 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -133,21 +133,10 @@ bool afs_cm_incoming_call(struct afs_call *call)
}
/*
- * clean up a cache manager call
+ * Clean up a cache manager call.
*/
static void afs_cm_destructor(struct afs_call *call)
{
- _enter("");
-
- /* Break the callbacks here so that we do it after the final ACK is
- * received. The step number here must match the final number in
- * afs_deliver_cb_callback().
- */
- if (call->unmarshall == 5) {
- ASSERT(call->cm_server && call->count && call->request);
- afs_break_callbacks(call->cm_server, call->count, call->request);
- }
-
kfree(call->buffer);
call->buffer = NULL;
}
@@ -161,14 +150,14 @@ static void SRXAFSCB_CallBack(struct work_struct *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);
+ /* We need to break the callbacks before sending the reply as the
+ * server holds up change visibility till it receives our reply so as
+ * to maintain cache coherency.
+ */
+ if (call->cm_server)
+ afs_break_callbacks(call->cm_server, call->count, call->request);
- afs_break_callbacks(call->cm_server, call->count, call->request);
+ afs_send_empty_reply(call);
afs_put_call(call);
_leave("");
}
@@ -180,7 +169,6 @@ static int afs_deliver_cb_callback(struct afs_call *call)
{
struct afs_callback_break *cb;
struct sockaddr_rxrpc srx;
- struct afs_server *server;
__be32 *bp;
int ret, loop;
@@ -267,15 +255,6 @@ static int afs_deliver_cb_callback(struct afs_call *call)
call->offset = 0;
call->unmarshall++;
-
- /* Record that the message was unmarshalled successfully so
- * that the call destructor can know do the callback breaking
- * work, even if the final ACK isn't received.
- *
- * If the step number changes, then afs_cm_destructor() must be
- * updated also.
- */
- call->unmarshall++;
case 5:
break;
}
@@ -286,10 +265,9 @@ static int afs_deliver_cb_callback(struct afs_call *call)
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
- server = afs_find_server(call->net, &srx);
- if (!server)
- return -ENOTCONN;
- call->cm_server = server;
+ call->cm_server = afs_find_server(call->net, &srx);
+ if (!call->cm_server)
+ trace_afs_cm_no_server(call, &srx);
return afs_queue_call_work(call);
}
@@ -303,7 +281,8 @@ static void SRXAFSCB_InitCallBackState(struct work_struct *work)
_enter("{%p}", call->cm_server);
- afs_init_callback_state(call->cm_server);
+ if (call->cm_server)
+ afs_init_callback_state(call->cm_server);
afs_send_empty_reply(call);
afs_put_call(call);
_leave("");
@@ -315,7 +294,6 @@ static void SRXAFSCB_InitCallBackState(struct work_struct *work)
static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
{
struct sockaddr_rxrpc srx;
- struct afs_server *server;
int ret;
_enter("");
@@ -328,10 +306,9 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
- server = afs_find_server(call->net, &srx);
- if (!server)
- return -ENOTCONN;
- call->cm_server = server;
+ call->cm_server = afs_find_server(call->net, &srx);
+ if (!call->cm_server)
+ trace_afs_cm_no_server(call, &srx);
return afs_queue_call_work(call);
}
@@ -341,8 +318,6 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
*/
static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
{
- struct sockaddr_rxrpc srx;
- struct afs_server *server;
struct afs_uuid *r;
unsigned loop;
__be32 *b;
@@ -398,11 +373,11 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
- rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
- server = afs_find_server(call->net, &srx);
- if (!server)
- return -ENOTCONN;
- call->cm_server = server;
+ rcu_read_lock();
+ call->cm_server = afs_find_server_by_uuid(call->net, call->request);
+ rcu_read_unlock();
+ if (!call->cm_server)
+ trace_afs_cm_no_server_u(call, call->request);
return afs_queue_call_work(call);
}