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由 Kevin Wolf 提交于
For meaningful error messages in the permission system, we need to get some human-readable description of the parent of a BdrvChild. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Acked-by: NFam Zheng <famz@redhat.com>
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