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authorTrond Myklebust <Trond.Myklebust@netapp.com>2009-06-17 13:22:59 -0700
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-06-17 13:22:59 -0700
commit965b5d679146c9f69bc0325388bb9ed357863c4f (patch)
treed70fe13004404f1d3a203c8b9b90aa5f61150115
parentd5122201a7f90b2aa73092f158b84d1d74f1134d (diff)
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>
-rw-r--r--fs/nfs/nfs4proc.c44
-rw-r--r--fs/nfs/nfs4state.c28
2 files changed, 56 insertions, 16 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d326193c978..55314e72163 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -804,16 +804,30 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state
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 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
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 @@ static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *
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 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
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;
}
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 0298e909559..6e094e95cf0 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -854,25 +854,29 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
status = ops->recover_lock(state, fl);
- if (status >= 0)
- continue;
switch (status) {
+ case 0:
+ break;
+ case -ESTALE:
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_STALE_STATEID:
+ case -NFS4ERR_BAD_STATEID:
+ case -NFS4ERR_EXPIRED:
+ case -NFS4ERR_NO_GRACE:
+ case -NFS4ERR_STALE_CLIENTID:
+ goto out;
default:
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
__func__, status);
- case -NFS4ERR_EXPIRED:
- case -NFS4ERR_NO_GRACE:
+ case -ENOMEM:
+ case -NFS4ERR_DENIED:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
- break;
- case -NFS4ERR_STALE_CLIENTID:
- goto out_err;
+ status = 0;
}
}
- up_write(&nfsi->rwsem);
- return 0;
-out_err:
+out:
up_write(&nfsi->rwsem);
return status;
}
@@ -918,6 +922,7 @@ restart:
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
__func__, status);
case -ENOENT:
+ case -ENOMEM:
case -ESTALE:
/*
* Open state on this file cannot be recovered
@@ -928,6 +933,9 @@ restart:
/* Mark the file as being 'closed' */
state->state = 0;
break;
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_STALE_STATEID:
+ case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
nfs4_state_mark_reclaim_nograce(sp->so_client, state);