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authorEric Biggers <ebiggers@google.com>2025-01-29 19:51:22 -0800
committerEric Biggers <ebiggers@google.com>2025-02-08 20:06:24 -0800
commitf6c3f6fb32301dfb35fed3ef8a39de3e13c67ad2 (patch)
treef2a3e8d2e3f7dc1b44e898c9999612fbe6c3af8d /tools/perf/scripts/python/export-to-postgresql.py
parentcrypto: crc64-rocksoft - remove from crypto API (diff)
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lib/crc64: rename CRC64-Rocksoft to CRC64-NVME
This CRC64 variant comes from the NVME NVM Command Set Specification (https://nvmexpress.org/wp-content/uploads/NVM-Express-NVM-Command-Set-Specification-1.0e-2024.07.29-Ratified.pdf). The "Rocksoft Model CRC Algorithm", published in 1993 and available at https://www.zlib.net/crc_v3.txt, is a generalized CRC algorithm that can calculate any variant of CRC, given a list of parameters such as polynomial, bit order, etc. It is not a CRC variant. The NVME NVM Command Set Specification has a table that gives the "Rocksoft Model Parameters" for the CRC variant it uses. When support for this CRC variant was added to Linux, this table seems to have been misinterpreted as naming the CRC variant the "Rocksoft" CRC. In fact, the table names the CRC variant as the "NVM Express 64b CRC". Most implementations of this CRC variant outside Linux have been calling it CRC64-NVME. Therefore, update Linux to match. While at it, remove the superfluous "update" from the function name, so crc64_rocksoft_update() is now just crc64_nvme(), matching most of the other CRC library functions. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com> Acked-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20250130035130.180676-4-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
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