The NVM Express protocol added enhancements to the data integrity field formats beyond the T10 defined protection information. A detailed description of the new formats can be found in the NVMe's NVM Command Set Specification, section 5.2, available at: https://nvmexpress.org/wp-content/uploads/NVM-Command-Set-Specification-1.0b-2021.12.18-Ratified.pdf This series implements one possible new format: the CRC64 guard with 48-bit reference tags. This does not add support for the variable "storage tag" field. The NVMe CRC64 parameters (from Rocksoft) were not implemented in the kernel, so a software implementation is included in this series based on the generated table. This series does not include any possible hardware excelleration (ex: x86's pclmulqdq), so it's not very high performant right now. Keith Busch (7): block: support pi with extended metadata nvme: allow integrity on extended metadata formats lib: add rocksoft model crc64 lib: add crc64 tests asm-generic: introduce be48 unaligned accessors block: add pi for nvme enhanced integrity nvme: add support for enhanced metadata block/Kconfig | 1 + block/bio-integrity.c | 1 + block/t10-pi.c | 198 +++++++++++++++++++++++++++++++- drivers/nvme/host/core.c | 167 ++++++++++++++++++++++----- drivers/nvme/host/nvme.h | 1 + include/asm-generic/unaligned.h | 26 +++++ include/linux/blk-integrity.h | 1 + include/linux/crc64.h | 2 + include/linux/nvme.h | 53 ++++++++- include/linux/t10-pi.h | 20 ++++ lib/Kconfig.debug | 3 + lib/Makefile | 1 + lib/crc64.c | 79 +++++++++++++ lib/gen_crc64table.c | 33 ++++-- lib/test_crc64.c | 68 +++++++++++ 15 files changed, 608 insertions(+), 46 deletions(-) create mode 100644 lib/test_crc64.c -- 2.25.4
