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由 Kevin Wolf 提交于
Store the BdrvChild for bs->file. At this point, bs->file_child->bs just duplicates the bs->file pointer. Later, it will completely replace it. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Reviewed-by: NFam Zheng <famz@redhat.com> Reviewed-by: NJeff Cody <jcody@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
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