NFSv4: try lease recovery on NFS4ERR_EXPIRED

Currently, if an nfs server returns NFS4ERR_EXPIRED to open(),
we return EIO to applications without even trying to recover.

Fixes: f39ac201a159 ("NFSv4: nfs4_do_handle_exception() handle revoke/expiry of a single stateid")
Signed-off-by: Robert Milkowski <rmilkowski@gmail.com>
Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index df38db2eee3b21da0338cb8f8c6c12f240166761..a4ace14756ac36c519ae14d0cc595f128a63436e 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3199,6 +3199,11 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir,
                        exception.retry = 1;
                        continue;
                }
+               if (status == -NFS4ERR_EXPIRED) {
+                       nfs4_schedule_lease_recovery(server->nfs_client);
+                       exception.retry = 1;
+                       continue;
+               }
                if (status == -EAGAIN) {
                        /* We must have found a delegation */
                        exception.retry = 1;