NFSv4.1: Fix nfs4_callback_recallslot to work with dynamic slot allocation

Ensure that the NFSv4.1 CB_RECALL_SLOT callback updates the slot table
target max slotid safely.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 52435ec44193..62212231ce62 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -498,6 +498,14 @@ static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
         tbl->generation++;
 }
 
+void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
+                u32 target_highest_slotid)
+{
+        spin_lock(&tbl->slot_tbl_lock);
+        nfs41_set_target_slotid_locked(tbl, target_highest_slotid);
+        spin_unlock(&tbl->slot_tbl_lock);
+}
+
 static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl,
                 u32 highest_slotid)
 {