NFSv4.1: Retry pNFS after a 2 minute timeout

If we had to fall back to read/write through MDS, then assume that we should
retry pNFS after a suitable timeout period.
The following patch sets a timeout of 2 minutes.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index e3eb7d1b17a8..bc8e5001203d 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -140,6 +140,7 @@ struct pnfs_layout_hdr {
         atomic_t                plh_outstanding; /* number of RPCs out */
         unsigned long           plh_block_lgets; /* block LAYOUTGET if >0 */
         u32                     plh_barrier; /* ignore lower seqids */
+        unsigned long           plh_retry_timestamp;
         unsigned long           plh_flags;
         loff_t                  plh_lwb; /* last write byte for layoutcommit */
         struct rpc_cred         *plh_lc_cred; /* layoutcommit cred */