This patch series enables protection information support with io_uring passthrough (io_uring_cmd) ioengine. This support is added for both DIF (extended logical blocks) and DIX (separate metadata buffer) cases. The initial patch adds support for metadata buffer. As we are unaware of metadata size during metadata buffer allocation, we provide an option md_per_io_size, which must be used to specify metadata size for single IO. This then enables the protection information support with and without PRACT bit set for both DIF and DIX cases. The support covers 16-bit and 64-bit guard protection information format, without storage tags. As 32-bit guard protection information format mandates minimum 16 bits for storage tag, it is not considered. This series also borrows relevant kernel crc16-t10 and crc64 rocksoft generation files, along with 48-bit accessors for reference tags. Ankit Kumar (10): engines:io_uring: add missing error during open file engines:io_uring: update arguments to fetch nvme data engines:io_uring: enable support for separate metadata buffer engines:io_uring: uring_cmd add support for protection info io_u: move engine data out of union crc: pull required crc16-t10 files from linux kernel engines:io_uring: generate and verify pi for 16b guard crc: pull required rocksoft crc64 apis from linux kernel engines:nvme: pull required 48 bit accessors from linux kernel engines:io_uring: generate and verify pi for 64b guard HOWTO.rst | 36 ++++ crc/crc-t10dif.h | 10 + crc/crc64.c | 31 +++ crc/crc64.h | 4 + crc/crc64table.h | 132 ++++++++++++ crc/crct10dif_common.c | 78 +++++++ engines/io_uring.c | 216 ++++++++++++++++--- engines/nvme.c | 467 +++++++++++++++++++++++++++++++++++++++-- engines/nvme.h | 230 +++++++++++++++++++- fio.1 | 35 +++ io_u.h | 2 +- 11 files changed, 1191 insertions(+), 50 deletions(-) create mode 100644 crc/crc-t10dif.h create mode 100644 crc/crc64table.h create mode 100644 crc/crct10dif_common.c -- 2.25.1
