From 03e06e68ff76294e53ffa898cb844d2a997b043e Mon Sep 17 00:00:00 2001 From: Ram Pai Date: Mon, 7 Nov 2005 17:19:33 -0500 Subject: [PATCH] introduce shared mounts This creates shared mounts. A shared mount when bind-mounted to some mountpoint, propagates mount/umount events to each other. All the shared mounts that propagate events to each other belong to the same peer-group. Signed-off-by: Ram Pai Signed-off-by: Al Viro Signed-off-by: Linus Torvalds --- fs/pnode.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'fs/pnode.c') diff --git a/fs/pnode.c b/fs/pnode.c index aaa0dffda12..1e22165ea41 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -11,7 +11,18 @@ #include #include "pnode.h" +/* return the next shared peer mount of @p */ +static inline struct vfsmount *next_peer(struct vfsmount *p) +{ + return list_entry(p->mnt_share.next, struct vfsmount, mnt_share); +} + void change_mnt_propagation(struct vfsmount *mnt, int type) { - mnt->mnt_flags &= ~MNT_PNODE_MASK; + if (type == MS_SHARED) { + mnt->mnt_flags |= MNT_SHARED; + } else { + list_del_init(&mnt->mnt_share); + mnt->mnt_flags &= ~MNT_PNODE_MASK; + } } -- cgit v1.2.3