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Cow cache snapshot rewriting #88

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rmalmain wants to merge 1 commit into main from cow_cache_refactoring

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rmalmain commented Oct 16, 2024

new implementation for block device snapshot.
what's new:

works for any block device (not only qcow2-backed stuff)
makes sure backends are always open in read-only. it becomes possible to have multiple fuzzers using the same file even if it's opened in r/w by qemu
works more smoothly for unaligned accesses


          wip cow cache rewriting

1559fd0

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