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20:vdQXQ0loGxHAT+D3i+8ZKY4fYT05pcKNMGW2KitN/0O4woJx7EnIQd68fwXm5tAMCYVlUWVoExAxUzRIzN5ykFCj4lgBpGeCtm+SWefN4pqRkHIGDdJt9qeOP8xJX7+gfoCrLvhsKULu284ES2jr5B8M0WC2LW+UpwSQNTVj6fk= X-MS-Office365-Filtering-Correlation-Id: 0bfbba4c-5aed-4cf2-8ceb-08d5b4f42d0f X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 May 2018 14:58:35.5994 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0bfbba4c-5aed-4cf2-8ceb-08d5b4f42d0f X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB3347 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.2.97 Subject: [Qemu-devel] [PATCH v9 1/9] mirror: inherit supported write/zero flags X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Anton Nefedov , berto@igalia.com, den@virtuozzo.com, qemu-block@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Anton Nefedov Reviewed-by: Alberto Garcia Reviewed-by: Eric Blake --- block/mirror.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/block/mirror.c b/block/mirror.c index 820f512..a22ddef 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1098,6 +1098,15 @@ 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, @@ -1163,6 +1172,8 @@ 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, NULL, mirror_top_bs, BLK_PERM_CONSISTENT_READ,