block/raw-format: implement .bdrv_cancel_in_flight handler

We are going to cancel in-flight requests on mirror nbd target on job
cancel. Still nbd is often used not directly but as raw-format child.
So, add pass-through handler here.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210205163720.887197-4-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
1 file changed