• Ram Pai's avatar
    [PATCH] unbindable mounts · 9676f0c6
    Ram Pai authored
    An unbindable mount does not forward or receive propagation.  Also
    unbindable mount disallows bind mounts.  The semantics is as follows.
    Bind semantics:
      It is invalid to bind mount an unbindable mount.
    Move semantics:
      It is invalid to move an unbindable mount under shared mount.
    Clone-namespace semantics:
      If a mount is unbindable in the parent namespace, the corresponding
      cloned mount in the child namespace becomes unbindable too.  Note:
      there is subtle difference, unbindable mounts cannot be bind mounted
      but can be cloned during clone-namespace.
    Signed-off-by: default avatarRam Pai <linuxram@us.ibm.com>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
pnode.h 1013 Bytes