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tests-bdrv-drain: bdrv_replace_test driver: declare supports_backing 

We do add COW child to the node.  In future we are going to forbid
adding COW child to the node that doesn't support backing. So, fix it
here now.

Don't worry about setting bs->backing itself: in further commit we'll
update the block-layer to automatically set/unset this field in generic
code.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220726201134.924743-6-vsementsov@yandex-team.ru>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-07-26 23:11:24 +03:00 committed by Kevin Wolf
parent 1dcea71979
commit 9ebfc111a1
1 changed files with 1 additions and 0 deletions
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tests/unit/test-bdrv-drain.c
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@ -1970,6 +1970,7 @@ static void coroutine_fn bdrv_replace_test_co_drain_end(BlockDriverState *bs)
static BlockDriver bdrv_replace_test = {
.format_name = "replace_test",
.instance_size = sizeof(BDRVReplaceTestState),
.supports_backing = true,
.bdrv_close = bdrv_replace_test_close,
.bdrv_co_preadv = bdrv_replace_test_co_preadv,