Signed-off-by: Anton Nefedov <anton.nefe...@virtuozzo.com> Reviewed-by: Alberto Garcia <be...@igalia.com> --- 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, -- 2.7.4