NFSv4.1: filelayout async error handler

Use our own async error handler.
Mark the layout as failed and retry i/o through the MDS on specified errors.

Update the mds_offset in nfs_readpage_retry so that a failed short-read retry
to a DS gets correctly resent through the MDS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 69c836373124..ab1bf5bb021f 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1453,6 +1453,7 @@ void nfs4_schedule_session_recovery(struct nfs4_session *session)
 {
         nfs4_schedule_lease_recovery(session->clp);
 }
+EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery);
 
 void nfs41_handle_recall_slot(struct nfs_client *clp)
 {