Re: [Qemu-devel] [PATCH v7 for-2.12 03/25] block: Add BDS.backing_overridden

2017-12-01 Thread Alberto Garcia
On Mon 20 Nov 2017 09:09:42 PM CET, Max Reitz wrote: > If the backing file is overridden, this most probably does change the > guest-visible data of a BDS. Therefore, we will need to consider this in > bdrv_refresh_filename(). > > Adding a new field to the BDS is not nice, but it is very simple and

[Qemu-devel] [PATCH v7 for-2.12 03/25] block: Add BDS.backing_overridden

2017-11-20 Thread Max Reitz
If the backing file is overridden, this most probably does change the guest-visible data of a BDS. Therefore, we will need to consider this in bdrv_refresh_filename(). Adding a new field to the BDS is not nice, but it is very simple and exactly keeps track of whether the backing file has been over