[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>
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@@ -105,6 +105,7 @@ extern int dir_notify_enable;
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#define MS_REC 16384
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#define MS_VERBOSE 32768
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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