[PATCH 0/4] add crc64 calculation as kernel library

Coly Li
2018-07-16T16:55:22Z

This patch set adds basic implementation of crc64 calculation as Linux
kernel library. Since bcache already does crc64 by itself, this patch
set also modifies bcache code to use the new crc64 library routine.

bcache uses crc64 as storage checksum, if a change of crc lib routines
results an inconsistent result, the unmatched checksum may make bcache
'think' the on-disk is corrupted, such change should be avoided or
detected as early as possible. Therefore the last patch in this series
adds a crc test framework, to check consistency of different calculations.

Coly Li

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Michael Lyle <mlyle@lyle.org>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
---
Andy Shevchenko (1):
lib/crc64: add crc64 option to lib/Kconfig

Coly Li (3):
lib: add crc64 calculation routines
bcache: use routines from lib/crc64.c for CRC64 calculation
lib/test_crc: Add test cases for crc calculation

drivers/md/bcache/bcache.h | 7 +-
drivers/md/bcache/btree.c | 2 +-
drivers/md/bcache/request.c | 2 +-
drivers/md/bcache/super.c | 5 +-
drivers/md/bcache/util.c | 131 ----------------------------------
drivers/md/bcache/util.h | 5 +-
include/linux/crc64.h | 15 ++++
lib/.gitignore | 2 +
lib/Kconfig | 8 +++
lib/Kconfig.debug | 11 +++
lib/Makefile | 12 ++++
lib/crc64.c | 71 +++++++++++++++++++
lib/gen_crc64table.c | 76 ++++++++++++++++++++
lib/test_crc.c | 136 ++++++++++++++++++++++++++++++++++++
14 files changed, 341 insertions(+), 142 deletions(-)
create mode 100644 include/linux/crc64.h
create mode 100644 lib/crc64.c
create mode 100644 lib/gen_crc64table.c
create mode 100644 lib/test_crc.c

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2.17.1