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block: Freeze the backing chain for the duration of the mirror job 

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2019-03-12 18:48:42 +02:00 committed by Kevin Wolf
parent df827336ab
commit ef53dc09ed
1 changed files with 8 additions and 0 deletions
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8
block/mirror.c
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@ -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);