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NLM: Don't hang forever on NLM unlock requests

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If the NLM daemon is killed on the NFS server, we can currently end up
hanging forever on an 'unlock' request, instead of aborting. Basically,
if the rpcbind request fails, or the server keeps returning garbage, we
really want to quit instead of retrying.

Tested-by: Vasily Averin <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Cc: [email protected]
This commit is contained in:
Trond Myklebust 2011-05-31 15:15:34 -04:00
commit 0b760113a3
4 changed files with 13 additions and 2 deletions
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8
fs/lockd/clntproc.c
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@ -708,7 +708,13 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data)
if (task->tk_status < 0) {
dprintk("lockd: unlock failed (err = %d)\n", -task->tk_status);
goto retry_rebind;
switch (task->tk_status) {
case -EACCES:
case -EIO:
goto die;
default:
goto retry_rebind;
}
}
if (status == NLM_LCK_DENIED_GRACE_PERIOD) {
rpc_delay(task, NLMCLNT_GRACE_WAIT);