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authorRam Pai <linuxram@us.ibm.com>2005-11-07 17:19:33 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 21:18:10 -0500
commit03e06e68ff76294e53ffa898cb844d2a997b043e (patch)
treedf17444b2c9b89e1eed75e09d46ea36c40ebd1df /include/linux/mount.h
parent07b20889e3052c7e77d6a6a54e7e83446eb1ba84 (diff)
[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 'include/linux/mount.h')
-rw-r--r--include/linux/mount.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 8eadd3b65899..2582559718fc 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -20,6 +20,7 @@
20#define MNT_NOSUID 0x01 20#define MNT_NOSUID 0x01
21#define MNT_NODEV 0x02 21#define MNT_NODEV 0x02
22#define MNT_NOEXEC 0x04 22#define MNT_NOEXEC 0x04
23#define MNT_SHARED 0x10 /* if the vfsmount is a shared mount */
23#define MNT_PNODE_MASK 0x30 /* propogation flag mask */ 24#define MNT_PNODE_MASK 0x30 /* propogation flag mask */
24 25
25struct vfsmount { 26struct vfsmount {
@@ -36,6 +37,7 @@ struct vfsmount {
36 char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ 37 char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
37 struct list_head mnt_list; 38 struct list_head mnt_list;
38 struct list_head mnt_expire; /* link in fs-specific expiry list */ 39 struct list_head mnt_expire; /* link in fs-specific expiry list */
40 struct list_head mnt_share; /* circular list of shared mounts */
39 struct namespace *mnt_namespace; /* containing namespace */ 41 struct namespace *mnt_namespace; /* containing namespace */
40 int mnt_pinned; 42 int mnt_pinned;
41}; 43};