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RH-Author: Kevin Wolf <kwolf@redhat.com> Message-id: <20200603160325.67506-11-kwolf@redhat.com> Patchwork-id: 97110 O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH v2 10/11] mirror: Make sure that source and target size match Bugzilla: 1778593 RH-Acked-by: Eric Blake <eblake@redhat.com> RH-Acked-by: Max Reitz <mreitz@redhat.com> RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com> If the target is shorter than the source, mirror would copy data until it reaches the end of the target and then fail with an I/O error when trying to write past the end. If the target is longer than the source, the mirror job would complete successfully, but the target wouldn't actually be an accurate copy of the source image (it would contain some additional garbage at the end). Fix this by checking that both images have the same size when the job starts. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200511135825.219437-4-kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> (cherry picked from commit e83dd6808c6e0975970f37b49b27cc37bb54eea8) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>