tree 9d328538c78f9be36db90eb4dff9c8d4b3de2e77
parent 3e890c77cf038d8c2de66ed7996fe77a6f94787c
author Kevin Wolf <kwolf@redhat.com> 1391866713 +0100
committer Kevin Wolf <kwolf@redhat.com> 1393012941 +0100

qcow2: Set zero flag for discarded clusters

Instead of making the backing file contents visible again after a discard
request, set the zero flag if possible (i.e. on version >= 3).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>