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NFS: When state recovery fails, waiting tasks should exit

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NFSv4 state recovery is not always successful.  Failure is signalled
by setting the nfs_client.cl_cons_state to a negative (errno) value,
then waking waiters.

Currently this can happen only during mount processing.  I'm about to
add an explicit case where state recovery failure during normal
operation should force all NFS requests waiting on that state recovery
to exit.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2012-07-11 16:30:41 -04:00 committed by Trond Myklebust
parent 6a1a1e34dc
commit 46a87b8a7b
1 changed files with 6 additions and 1 deletions
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5
fs/nfs/nfs4proc.c
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@ -258,7 +258,12 @@ static int nfs4_wait_clnt_recover(struct nfs_client *clp)
res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
nfs_wait_bit_killable, TASK_KILLABLE);
if (res)
return res;
if (clp->cl_cons_state < 0)
return clp->cl_cons_state;
return 0;
}
static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)