[PATCH] beginning of the shared-subtree proper

A private mount does not forward or receive propagation.  This patch
provides user the ability to convert any mount to private.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 6 insertions, 5 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9a593ef262ef..6c431086abb3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -104,6 +104,7 @@ extern int dir_notify_enable;
 #define MS_MOVE         8192
 #define MS_REC          16384
 #define MS_VERBOSE      32768
+#define MS_PRIVATE      (1<<18) /* change to private */
 #define MS_POSIXACL     (1<<16) /* VFS does not apply the umask */
 #define MS_ACTIVE       (1<<30)
 #define MS_NOUSER       (1<<31)
diff --git a/include/linux/mount.h b/include/linux/mount.h
index ffb0b5089880..8eadd3b65899 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,12 +17,12 @@
 #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_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 */