NFS: callback per-net usage counting introduced

This patch also introduces refcount-aware nfs_callback_down_net() wrapper for
svc_shutdown_net().

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h
index 137238b012fb..b9c7f9b1f91b 100644
--- a/fs/nfs/netns.h
+++ b/fs/nfs/netns.h
@@ -24,6 +24,7 @@ struct nfs_net {
         struct idr cb_ident_idr; /* Protected by nfs_client_lock */
         unsigned short nfs_callback_tcpport;
         unsigned short nfs_callback_tcpport6;
+        int cb_users[NFS4_MAX_MINOR_VERSION + 1];
 #endif
         spinlock_t nfs_client_lock;
         struct timespec boot_time;