Messages in this thread | | | From | riya khanna <> | Date | Sat, 18 Mar 2017 10:04:00 -0400 | Subject | Re: fanotify and namespaces/bind mounts |
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Are fsnotify events generated per mount namespace?
On Thu, Oct 29, 2015 at 9:29 AM, Marko Rauhamaa <marko@pacujo.net> wrote: > > If I call fanotify_mark(... FAN_MARK_ADD | FAN_MARK_MOUNT ...), I get > notifications on all files on the file system. > > Except I don't. > > If a process has mounted directories on the file system in a different > namespace, the global namespace experiences file system events but no > fanotify events are generated. A similar limitation applies to bind > mounts. > > You can easily see this behavior in action. Do "man fanotify", and copy > the example program to, say, example.c. Then, > > cc -o example example.c > mkdir -p /mnt/xyz > mount -o bind /root /mnt/xyz > ./example /root > > The last command prints out fanotify events. It will display events for > > touch /root/xyzzy > > but nothing for > > touch /mnt/xyz/zyxxy > > or > > unshare -m touch /root/yxyyx > > Should the current situation be considered a bug in fanotify? Or is > there another recommended way to monitor file system events > categorigally? > > > Marko > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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