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由 John Ferlan 提交于
Instead of having duplicated code in qemuStorageLimitsRefresh and virStorageBackendUpdateVolTargetInfo to get capacity specific data about the storage backing source or volume -- create a common API to handle the details for both. As a side effect, virStorageFileProbeFormatFromBuf returns to being a local/static helper to virstoragefile.c For the QEMU code - if the probe is done, then the format is saved so as to avoid future such probes. For the storage backend code, there is no need to deal with the probe since we cannot call the new API if target->format == NONE. Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
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