Archipelago » qemu

qemu-iotests: Always filter cluster_size out in _make_test_img

Some image formats do have a cluster size, others don't, but there are
tests that work with both sets of images and currently we get failures
because the qemu-img create output doesn't mention the cluster size for...

qemu-iotests: improve rebase test

The old test didn't consider cases in which the COW files contains some
unallocated clusters and after them allocated ones again.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>