NFS: Create a return_delegation rpc op

Delegations are a v4 feature, so push return_delegation out of the
generic client by creating a new rpc_op and renaming the old function to
be in the nfs v4 "namespace"

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

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 4aed3ddf9bba..16632930abd2 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -739,6 +739,12 @@ static int nfs_have_delegation(struct inode *inode, fmode_t flags)
         return 0;
 }
 
+static int nfs_return_delegation(struct inode *inode)
+{
+        nfs_wb_all(inode);
+        return 0;
+}
+
 const struct nfs_rpc_ops nfs_v2_clientops = {
         .version        = 2,                   /* protocol version */
         .dentry_ops     = &nfs_dentry_operations,
@@ -783,5 +789,6 @@ const struct nfs_rpc_ops nfs_v2_clientops = {
         .lock_check_bounds = nfs_lock_check_bounds,
         .close_context  = nfs_close_context,
         .have_delegation = nfs_have_delegation,
+        .return_delegation = nfs_return_delegation,
         .init_client    = nfs_init_client,
 };