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由 Eric Blake 提交于
Now that we can crawl the chain of backing files, we can do argument validation and implement the 'shallow' flag. In testing this, I discovered that it can be handy to pass the shallow flag and an explicit base, as a means of validating that the base is indeed the file we expected. * src/qemu/qemu_driver.c (qemuDomainBlockCommit): Crawl through chain to implement shallow flag. * src/libvirt.c (virDomainBlockCommit): Relax API.
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