NFSv4: Defer inode revalidation when setting up a delegation

Currently we force a synchronous call to __nfs_revalidate_inode() in
nfs_inode_set_delegation(). This not only ensures that we cannot call
nfs_inode_set_delegation from an asynchronous context, but it also slows
down any call to open().

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

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index cf395351cdd4..e94971040de9 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -184,6 +184,7 @@ struct nfs_inode {
 #define NFS_INO_INVALID_ACCESS  0x0008          /* cached access cred invalid */
 #define NFS_INO_INVALID_ACL     0x0010          /* cached acls are invalid */
 #define NFS_INO_REVAL_PAGECACHE 0x0020          /* must revalidate pagecache */
+#define NFS_INO_REVAL_FORCED    0x0040          /* force revalidation ignoring a delegation */
 
 /*
  * Bit offsets in flags field