nfs41: check SEQUENCE status flag

the server can indicate a number of error conditions by setting the
appropriate bits in the SEQUENCE operation. The client re-establishes
state with the server when it receives one of those, with the action
depending on the specific case.

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

2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index c4c060208109..89404bfb72b6 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -128,6 +128,8 @@
 #define SEQ4_STATUS_RECALLABLE_STATE_REVOKED    0x00000040
 #define SEQ4_STATUS_LEASE_MOVED                 0x00000080
 #define SEQ4_STATUS_RESTART_RECLAIM_NEEDED      0x00000100
+#define SEQ4_STATUS_CB_PATH_DOWN_SESSION        0x00000200
+#define SEQ4_STATUS_BACKCHANNEL_FAULT           0x00000400
 
 #define NFS4_MAX_UINT64 (~(u64)0)
 
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 8c880372536e..ea32db30c289 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -172,6 +172,7 @@ struct nfs4_sequence_res {
         u8                      sr_slotid;      /* slot used to send request */
         int                     sr_status;      /* sequence operation status */
         unsigned long           sr_renewal_time;
+        u32                     sr_status_flags;
 };
 
 struct nfs4_get_lease_time_args {