ACK: [Oneiric][SRU] Fix loop device notificaitons.

[Tim Gardner]

On 01/18/2012 08:46 AM, Ayan George wrote:
>
> SRU Justification:
>
> Impact: The loop device does not emit a change uevent when autoreleasing
> a device.  Programs that depend on uevents (like gvfs and ultimately
> Nautilus) never notice when loop devices are unmounted.
>
> Bug-Link: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/548546
>
> Fix: Apply 8a9c594422ecad912d6470888acdee9a1236ad68 from linux mainline
> -- Pass a valid bdev pointer to loop_clr_fd() instead of NULL so that
> it will emit the uevent.
>
> The patch is very small and applies cleanly to ubuntu-oneiric.
>
> Testcase:
>
> (1) In a terminal, start udevadm in monitor mode:
>
>    $ udevadm monitor
>
> (2) In another terminal, mount an ISO image using the loopback device:
>
>    $ sudo mount -o loop -t iso9660 your_image.iso /mnt
>
> (3) Notice the change uevents that udevadm reports.
>
> (4) Unmount image:
>
>    $ sudo umount /mnt
>
> (5) Note that udevadm does not report any changes.  With the patch
> applied, you will see the kernel noticiations.
>
>
>
>
>


-- 
Tim Gardner tim.gardner at canonical.com