NFS: Add timeout to submounts

Make automounted partitions expire using the mark_mounts_for_expiry()
function. The timeout is controlled via a sysctl.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 47167ab64f5b..3eea556d8f59 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -167,6 +167,7 @@ static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
         struct nfs_server *server;
         struct rpc_clnt *rpc;
 
+        shrink_submounts(vfsmnt, &nfs_automount_list);
         if (!(flags & MNT_FORCE))
                 return;
         /* -EIO all pending I/O */
@@ -1943,6 +1944,7 @@ static void nfs_kill_super(struct super_block *s)
         nfs_free_iostats(server->io_stats);
         kfree(server->hostname);
         kfree(server);
+        nfs_release_automount_timer();
 }
 
 static struct file_system_type nfs_fs_type = {
@@ -2288,6 +2290,7 @@ static void nfs4_kill_super(struct super_block *sb)
         nfs_free_iostats(server->io_stats);
         kfree(server->hostname);
         kfree(server);
+        nfs_release_automount_timer();
 }
 
 static struct file_system_type nfs4_fs_type = {