[PATCH 3.12 053/206] lockd: Try to reconnect if statd has moved

From: Jiri Slaby
Date: Tue Nov 18 2014 - 10:06:28 EST

From: Benjamin Coddington <bcodding@xxxxxxxxxx>

3.12-stable review patch. If anyone has any objections, please let me know.


commit 173b3afceebe76fa2205b2c8808682d5b541fe3c upstream.

If rpc.statd is restarted, upcalls to monitor hosts can fail with
ECONNREFUSED. In that case force a lookup of statd's new port and retry the

Signed-off-by: Benjamin Coddington <bcodding@xxxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
fs/lockd/mon.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 1812f026960c..6ae664b489af 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -159,6 +159,12 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,

msg.rpc_proc = &clnt->cl_procinfo[proc];
status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN);
+ if (status == -ECONNREFUSED) {
+ dprintk("lockd: NSM upcall RPC failed, status=%d, forcing rebind\n",
+ status);
+ rpc_force_rebind(clnt);
+ status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN);
+ }
if (status < 0)
dprintk("lockd: NSM upcall RPC failed, status=%d\n",

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