NFSv4: Always use the delegation if we have one

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

1 files changed, 9 insertions, 5 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 44b56c915f72..4a1c4d80a577 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -122,7 +122,10 @@ struct nfs4_lock_state {
 /* bits for nfs4_state->flags */
 enum {
         LK_STATE_IN_USE,
-        NFS_DELEGATED_STATE,
+        NFS_DELEGATED_STATE,            /* Current stateid is delegation */
+        NFS_O_RDONLY_STATE,             /* OPEN stateid has read-only state */
+        NFS_O_WRONLY_STATE,             /* OPEN stateid has write-only state */
+        NFS_O_RDWR_STATE,               /* OPEN stateid has read/write state */
 };
 
 struct nfs4_state {
@@ -136,11 +139,12 @@ struct nfs4_state {
         unsigned long flags;            /* Do we hold any locks? */
         spinlock_t state_lock;          /* Protects the lock_states list */
 
-        nfs4_stateid stateid;
+        nfs4_stateid stateid;           /* Current stateid: may be delegation */
+        nfs4_stateid open_stateid;      /* OPEN stateid */
 
-        unsigned int n_rdonly;
-        unsigned int n_wronly;
-        unsigned int n_rdwr;
+        unsigned int n_rdonly;          /* Number of read-only references */
+        unsigned int n_wronly;          /* Number of write-only references */
+        unsigned int n_rdwr;            /* Number of read/write references */
         int state;                      /* State on the server (R,W, or RW) */
         atomic_t count;
 };