1 files changed, 15 insertions, 14 deletions

diff --git a/include/linux/mount.h b/include/linux/mount.h
index f8f39937e301..dd4e83eba933 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,12 +17,14 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
-#define MNT_NOSUID      1
-#define MNT_NODEV       2
-#define MNT_NOEXEC      4
+#define MNT_NOSUID      0x01
+#define MNT_NODEV       0x02
+#define MNT_NOEXEC      0x04
+#define MNT_SHARED      0x10    /* if the vfsmount is a shared mount */
+#define MNT_UNBINDABLE  0x20    /* if the vfsmount is a unbindable mount */
+#define MNT_PNODE_MASK  0x30    /* propogation flag mask */
 
-struct vfsmount
-{
+struct vfsmount {
         struct list_head mnt_hash;
         struct vfsmount *mnt_parent;    /* fs we are mounted on */
         struct dentry *mnt_mountpoint;  /* dentry of mountpoint */
@@ -36,7 +38,12 @@ struct vfsmount
         char *mnt_devname;              /* Name of device e.g. /dev/dsk/hda1 */
         struct list_head mnt_list;
         struct list_head mnt_expire;    /* link in fs-specific expiry list */
+        struct list_head mnt_share;     /* circular list of shared mounts */
+        struct list_head mnt_slave_list;/* list of slave mounts */
+        struct list_head mnt_slave;     /* slave list entry */
+        struct vfsmount *mnt_master;    /* slave is on master->mnt_slave_list */
         struct namespace *mnt_namespace; /* containing namespace */
+        int mnt_pinned;
 };
 
 static inline struct vfsmount *mntget(struct vfsmount *mnt)
@@ -46,15 +53,9 @@ static inline struct vfsmount *mntget(struct vfsmount *mnt)
         return mnt;
 }
 
-extern void __mntput(struct vfsmount *mnt);
-
-static inline void mntput_no_expire(struct vfsmount *mnt)
-{
-        if (mnt) {
-                if (atomic_dec_and_test(&mnt->mnt_count))
-                        __mntput(mnt);
-        }
-}
+extern void mntput_no_expire(struct vfsmount *mnt);
+extern void mnt_pin(struct vfsmount *mnt);
+extern void mnt_unpin(struct vfsmount *mnt);
 
 static inline void mntput(struct vfsmount *mnt)
 {