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| author | Ram Pai <linuxram@us.ibm.com> | 2005-11-07 17:19:33 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-07 18:18:10 -0800 |
| commit | 03e06e68ff76294e53ffa898cb844d2a997b043e (patch) | |
| tree | df17444b2c9b89e1eed75e09d46ea36c40ebd1df /fs/pnode.c | |
| parent | 07b20889e3052c7e77d6a6a54e7e83446eb1ba84 (diff) | |
| download | linux-03e06e68ff76294e53ffa898cb844d2a997b043e.tar.gz linux-03e06e68ff76294e53ffa898cb844d2a997b043e.tar.bz2 linux-03e06e68ff76294e53ffa898cb844d2a997b043e.zip | |
[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 <linuxram@us.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/pnode.c')
| -rw-r--r-- | fs/pnode.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/pnode.c b/fs/pnode.c index aaa0dffda12a..1e22165ea41f 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -11,7 +11,18 @@ #include <linux/fs.h> #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; + } } |