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qed: Add support for zero clusters
Zero clusters are similar to unallocated clusters except instead of readingtheir value from a backing file when one is available, the cluster is alwaysread as zero.
This implements read support only. At this stage, QED will never write a...
qed: Consistency check support
This patch adds support for the qemu-img check command. It alsointroduces a dirty bit in the qed header to mark modified images asneeding a check. This bit is cleared when the image file is closedcleanly.
If an image file is opened and it has the dirty bit set, a consistency...