Re: [PATCH v2] block/backup-top: fix flags handling

[Eric Blake]

On 2/3/20 7:42 AM, Vladimir Sementsov-Ogievskiy wrote:
> backup-top "supports" write-unchanged, by skipping CBW operation in
> backup_top_co_pwritev. But it forgets to do the same in
> backup_top_co_pwrite_zeroes, as well as declare support for
> BDRV_REQ_WRITE_UNCHANGED.
>
> Fix this, and, while being here, declare also support for flags
> supported by source child.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> ---

Reviewed-by: Eric Blake <address@hidden>

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Eric Blake, Principal Software Engineer
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