qemu-iotests: Add test case for mirror with unmap
This checks that the discard on mirror source that effectively zeroes
data is also reflected by the data of target.
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit
c615091793f53ff33b8f6c1b1ba711cf7c93e97b)
Conflicts:
tests/qemu-iotests/group
*remove context dependencies on newer block tests
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>