From 786615bc1ce84150ded80daea6bd9f6297f48e73 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Mon, 5 Aug 2013 16:04:47 -0400
Subject: SUNRPC: If the rpcbind channel is disconnected, fail the call to
unregister
If rpcbind causes our connection to the AF_LOCAL socket to close after
we've registered a service, then we want to be careful about reconnecting
since the mount namespace may have changed.
By simply refusing to reconnect the AF_LOCAL socket in the case of
unregister, we avoid the need to somehow save the mount namespace. While
this may lead to some services not unregistering properly, it should
be safe.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Nix <nix@esperi.org.uk>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org # 3.9.x
---
net/sunrpc/clnt.c | 4 ++++
1 file changed, 4 insertions(+)
(limited to 'net/sunrpc/clnt.c')
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 74f6a704e37..ecbc4e3d83a 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1660,6 +1660,10 @@ call_connect(struct rpc_task *task)
task->tk_action = call_connect_status;
if (task->tk_status < 0)
return;
+ if (task->tk_flags & RPC_TASK_NOCONNECT) {
+ rpc_exit(task, -ENOTCONN);
+ return;
+ }
xprt_connect(task);
}
}
--
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