Block Cloning Testing for zfs-2.2

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• Added tests for block cloning replay support for encrypted and non-encrypted scenarios: . Encrypted replay tests the scenario mentioned in .

• Found a bug, which was triggered due to LWB split optimization when cloning a file over 1022 L0 block pointers. Tried to debug to find the root cause and reported to Mav, and he removed the specific optimization for now . Umer will add a test case under .

• Found that zdb -bcv testpool hitting ASSERT after replay is completed and block cloning enabled. Reported to Mav and fixed with the PR:

• Found another scenario where both the original file and the cloned file were created after the pool was frozen. After the replay, the cloned file was corrupted. Discussed this in detail with Mav and he opened a PR to fix a similar scenario that requires specific timing and forced reboot: .