[patch 3/7] vfs: mountinfo: add mount ID

Add a unique ID to each vfsmount using the IDR infrastructure.  The
identifiers are reused after the vfsmount is freed.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 87b24cea1863..f0dfb17ffccc 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -56,6 +56,7 @@ struct vfsmount {
         struct list_head mnt_slave;     /* slave list entry */
         struct vfsmount *mnt_master;    /* slave is on master->mnt_slave_list */
         struct mnt_namespace *mnt_ns;   /* containing namespace */
+        int mnt_id;                     /* mount identifier */
         /*
          * We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
          * to let these frequently modified fields in a separate cache line