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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 /include | |
| 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 'include')
| -rw-r--r-- | include/linux/fs.h | 1 | ||||
| -rw-r--r-- | include/linux/mount.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 6c431086abb3..551fba303cf8 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -105,6 +105,7 @@ extern int dir_notify_enable; #define MS_REC 16384 #define MS_VERBOSE 32768 #define MS_PRIVATE (1<<18) /* change to private */ +#define MS_SHARED (1<<20) /* change to shared */ #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 8eadd3b65899..2582559718fc 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -20,6 +20,7 @@ #define MNT_NOSUID 0x01 #define MNT_NODEV 0x02 #define MNT_NOEXEC 0x04 +#define MNT_SHARED 0x10 /* if the vfsmount is a shared mount */ #define MNT_PNODE_MASK 0x30 /* propogation flag mask */ struct vfsmount { @@ -36,6 +37,7 @@ struct vfsmount { char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ struct list_head mnt_list; struct list_head mnt_expire; /* link in fs-specific expiry list */ + struct list_head mnt_share; /* circular list of shared mounts */ struct namespace *mnt_namespace; /* containing namespace */ int mnt_pinned; }; |