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/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 0ce8704732c2..a34b3ee443f1 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -405,7 +405,10 @@ extern void nfs_unregister_sysctl(void);
 /*
  * linux/fs/nfs/namespace.c
  */
+extern struct list_head nfs_automount_list;
 extern struct inode_operations nfs_mountpoint_inode_operations;
+extern int nfs_mountpoint_expiry_timeout;
+extern void nfs_release_automount_timer(void);
 
 /*
  * linux/fs/nfs/unlink.c