nfs4: V2 return/expire delegations depending on their type

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

1 files changed, 18 insertions, 4 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 6fc9fe0af3d0..98dbc8f5ced8 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -385,29 +385,43 @@ void nfs_super_return_all_delegations(struct super_block *sb)
                 nfs4_schedule_state_manager(clp);
 }
 
-static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
+static
+void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, fmode_t flags)
 {
         struct nfs_delegation *delegation;
 
         rcu_read_lock();
         list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
-                nfs_mark_return_delegation(clp, delegation);
+                if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE))
+                        continue;
+                if (delegation->type & flags)
+                        nfs_mark_return_delegation(clp, delegation);
         }
         rcu_read_unlock();
 }
 
+static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
+{
+        nfs_client_mark_return_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
+}
+
 static void nfs_delegation_run_state_manager(struct nfs_client *clp)
 {
         if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state))
                 nfs4_schedule_state_manager(clp);
 }
 
-void nfs_expire_all_delegations(struct nfs_client *clp)
+static void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags)
 {
-        nfs_client_mark_return_all_delegations(clp);
+        nfs_client_mark_return_all_delegation_types(clp, flags);
         nfs_delegation_run_state_manager(clp);
 }
 
+void nfs_expire_all_delegations(struct nfs_client *clp)
+{
+        nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
+}
+
 /*
  * Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
  */