From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33553) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1evKWG-0002iu-0a for qemu-devel@nongnu.org; Mon, 12 Mar 2018 06:17:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1evKWB-0006ZY-LR for qemu-devel@nongnu.org; Mon, 12 Mar 2018 06:17:27 -0400 From: Anton Nefedov Date: Mon, 12 Mar 2018 13:16:50 +0300 Message-Id: <1520849818-6915-2-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1520849818-6915-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1520849818-6915-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v8 1/9] mirror: inherit supported write/zero flags List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, eblake@redhat.com, den@virtuozzo.com, berto@igalia.com, Anton Nefedov Signed-off-by: Anton Nefedov --- block/mirror.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/block/mirror.c b/block/mirror.c index f5bf620..2fb786f 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1100,6 +1100,15 @@ static BlockDriver bdrv_mirror_top = { .bdrv_child_perm = bdrv_mirror_top_child_perm, }; +static void mirror_top_set_supported_flags(BlockDriverState *bs) +{ + bs->supported_write_flags = BDRV_REQ_FUA & + bs->backing->bs->supported_write_flags; + bs->supported_zero_flags = + (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) & + bs->backing->bs->supported_zero_flags; +} + static void mirror_start_job(const char *job_id, BlockDriverState *bs, int creation_flags, BlockDriverState *target, const char *replaces, int64_t speed, @@ -1165,6 +1174,8 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs, return; } + mirror_top_set_supported_flags(mirror_top_bs); + /* Make sure that the source is not resized while the job is running */ s = block_job_create(job_id, driver, mirror_top_bs, BLK_PERM_CONSISTENT_READ, -- 2.7.4