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NFSv4: Handle NFS4ERR_DELAY and NFS4ERR_GRACE in nfs4_lock_delegation_recall

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A server shouldn't normally return NFS4ERR_GRACE if the client holds a
delegation, since no conflicting lock reclaims can be granted, however
the spec does not require the server to grant the lock in this
instance.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Trond Myklebust 2013-04-01 14:27:29 -04:00
parent cb60718747
commit dbb21c25a3
1 changed files with 6 additions and 0 deletions
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6
fs/nfs/nfs4proc.c
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@ -5176,6 +5176,12 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
nfs4_schedule_stateid_recovery(server, state); nfs4_schedule_stateid_recovery(server, state);
err = 0; err = 0;
goto out; goto out;
case -NFS4ERR_DELAY:
case -NFS4ERR_GRACE:
set_bit(NFS_DELEGATED_STATE, &state->flags);
ssleep(1);
err = -EAGAIN;
goto out;
case -ENOMEM: case -ENOMEM:
case -NFS4ERR_DENIED: case -NFS4ERR_DENIED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */ /* kill_proc(fl->fl_pid, SIGLOST, 1); */