Re: [Qemu-devel] [PATCH v3 03/25] block: Add BDS.backing_overridden

2017-01-11 Thread Eric Blake
On 11/29/2016 07:18 PM, 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 > exactly

Re: [Qemu-devel] [PATCH v3 03/25] block: Add BDS.backing_overridden

2017-01-11 Thread Max Reitz
On 11.01.2017 20:00, Eric Blake wrote: > On 11/29/2016 07:18 PM, 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 n

[Qemu-devel] [PATCH v3 03/25] block: Add BDS.backing_overridden

2016-11-29 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