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由 Kevin Wolf 提交于
All callers will have to request permissions for all of their child nodes. Block drivers that act as simply filters can use the default implementation of .bdrv_child_perm(). 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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