On 2018-01-18 18:49, Anton Nefedov wrote:
> Support the flag if the underlying BDS supports it
> 
> Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
> Reviewed-by: Alberto Garcia <berto@igalia.com>
> ---
>  block/blkdebug.c   | 3 ++-
>  block/blkverify.c  | 2 +-
>  block/mirror.c     | 2 +-
>  block/raw-format.c | 3 ++-
>  4 files changed, 6 insertions(+), 4 deletions(-)

May need a fixup for mirror.c; and maybe quorum would be another driver
to think about (it currently doesn't handle these flags at all).

Max