[Bug 252316] [PATCH] add OCF offloading to ZFS

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252316

--- Comment #3 from Jeremy Faulkner <gldisater at gmail.com> ---
The original patch includes adding a consumer for OCF to offload SHA256 in ZFS,
it can be used to test. When implementing that patch I encountered an issue
where none of the OCF drivers were handling crp_digest_start on a
crypto_request. So the drivers would run Init and Finish without running Update
producing an incorrect result and causing ZFS to output checksum errors as the
data written prior to patching was not matching the miscalculated checksum.

After discussing it with Allan Jude I've resubmitted the patch without the
OpenZFS parts and will submit those parts upstream after some modification so
it will not break Linux compiles.

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