NFSv4: Handle more errors when recovering open file and locking state
It is possible for servers to return NFS4ERR_BAD_STATEID when
the state management code is recovering locks or is reclaiming state when
returning a delegation. Ensure that we handle that case.
While we're at it, add in handlers for NFS4ERR_STALE,
NFS4ERR_ADMIN_REVOKED, NFS4ERR_OPENMODE, NFS4ERR_DENIED and
NFS4ERR_STALE_STATEID, since the protocol appears to allow for them too.
Also handle ENOMEM...
Finally, rather than add new NFSv4.0-specific errors and error handling into
the generic delegation code, move that open file and locking state error
handling into the NFSv4 layer.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d326193..55314e7 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -804,16 +804,30 @@
err = _nfs4_open_delegation_recall(ctx, state, stateid);
switch (err) {
case 0:
- return err;
+ case -ENOENT:
+ case -ESTALE:
+ goto out;
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
/* Don't recall a delegation if it was lost */
nfs4_schedule_state_recovery(server->nfs_client);
- return err;
+ goto out;
+ case -ERESTARTSYS:
+ /*
+ * The show must go on: exit, but mark the
+ * stateid as needing recovery.
+ */
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_BAD_STATEID:
+ nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
+ case -ENOMEM:
+ err = 0;
+ goto out;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
+out:
return err;
}
@@ -3487,8 +3501,6 @@
ret = nfs4_wait_for_completion_rpc_task(task);
if (ret == 0) {
ret = data->rpc_status;
- if (ret == -NFS4ERR_DENIED)
- ret = -EAGAIN;
} else
data->cancelled = 1;
rpc_put_task(task);
@@ -3576,9 +3588,11 @@
int err;
do {
+ err = _nfs4_proc_setlk(state, cmd, request);
+ if (err == -NFS4ERR_DENIED)
+ err = -EAGAIN;
err = nfs4_handle_exception(NFS_SERVER(state->inode),
- _nfs4_proc_setlk(state, cmd, request),
- &exception);
+ err, &exception);
} while (exception.retry);
return err;
}
@@ -3635,11 +3649,29 @@
printk(KERN_ERR "%s: unhandled error %d.\n",
__func__, err);
case 0:
+ case -ESTALE:
goto out;
case -NFS4ERR_EXPIRED:
case -NFS4ERR_STALE_CLIENTID:
+ case -NFS4ERR_STALE_STATEID:
nfs4_schedule_state_recovery(server->nfs_client);
goto out;
+ case -ERESTARTSYS:
+ /*
+ * The show must go on: exit, but mark the
+ * stateid as needing recovery.
+ */
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_BAD_STATEID:
+ case -NFS4ERR_OPENMODE:
+ nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
+ err = 0;
+ goto out;
+ case -ENOMEM:
+ case -NFS4ERR_DENIED:
+ /* kill_proc(fl->fl_pid, SIGLOST, 1); */
+ err = 0;
+ goto out;
case -NFS4ERR_DELAY:
break;
}