From ef53dc09ed6aacca12aeb204258779273ba513ca Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Tue, 12 Mar 2019 18:48:42 +0200 Subject: [PATCH] block: Freeze the backing chain for the duration of the mirror job Signed-off-by: Alberto Garcia Signed-off-by: Kevin Wolf --- block/mirror.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/block/mirror.c b/block/mirror.c index 726d3c27fb..010fdafd79 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -630,6 +630,10 @@ static int mirror_exit_common(Job *job) } s->prepared = true; + if (bdrv_chain_contains(src, target_bs)) { + bdrv_unfreeze_backing_chain(mirror_top_bs, target_bs); + } + bdrv_release_dirty_bitmap(src, s->dirty_bitmap); /* Make sure that the source BDS doesn't go away during bdrv_replace_node, @@ -1639,6 +1643,10 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs, goto fail; } } + + if (bdrv_freeze_backing_chain(mirror_top_bs, target, errp) < 0) { + goto fail; + } } QTAILQ_INIT(&s->ops_in_flight); -- 2.30.2