On Tue, Aug 02, 2016 at 07:58:29PM +0200, Stanislav Brabec wrote:
> Kernel needs some time to delete a device after losetup --detach. If the losetup
> --find is called just after losetup --delete, it can sometimes attempt to
> recycle the device that is just being released. To prevent this race,
> clear the AUTOCLEAR flag of the device.
>
> Signed-off-by: Stanislav Brabec <sbrabec@xxxxxxx>
> ---
> sys-utils/losetup.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/sys-utils/losetup.c b/sys-utils/losetup.c
> index 28cde2b..ba096fe 100644
> --- a/sys-utils/losetup.c
> +++ b/sys-utils/losetup.c
> @@ -720,6 +720,12 @@ int main(int argc, char **argv)
> /* We found a device to recycle. Do not check
> * for conflict. If it is conflicting, then
> * user was already warned in past. */
> + lc.info.lo_flags &= !LO_FLAGS_AUTOCLEAR;
> + if (loopcxt_set_status(&lc)) {
> + loopcxt_deinit(&lc);
> + errx(EXIT_FAILURE, _("%s: failed to re-use loop device"),
> + loopcxt_get_device(&lc));
> + }
This is strange, what if the device we want to reuse has been created
by mount(8) and AUTOCLEAR flag is wanted.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
--
To unsubscribe from this list: send the line "unsubscribe util-linux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
