34d0d68bdf295fe834b7c49d3f610fe86f587c6e
When trying to do COW, VMDK wrote the data back to the backing file. This
problem was revealed by the patch that made backing files read-only. This patch
does not only fix the problem, but also simplifies the VMDK code a bit.
This fixes the backing file qemu-iotests cases for VMDK.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit c336500df5
)
Read the documentation in qemu-doc.html. Fabrice Bellard.
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