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path: root/fs/btrfs/crc32c.h
AgeCommit message (Collapse)Author
2009-01-07Btrfs: Drop the hardware crc32c asm codeChris Mason
This is already in the arch specific directories in mainline and shouldn't be copied into btrfs. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-29Btrfs: add and improve commentsChris Mason
This improves the comments at the top of many functions. It didn't dive into the guts of functions because I was trying to avoid merging problems with the new allocator and back reference work. extent-tree.c and volumes.c were both skipped, and there is definitely more work todo in cleaning and commenting the code. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Remove Btrfs compat code for older kernelsChris Mason
Btrfs had compatibility code for kernels back to 2.6.18. These have been removed, and will be maintained in a separate backport git tree from now on. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for HW assisted crc32cChris Mason
Intel doesn't yet ship hardware to the public with this enabled, but when they do, they will be ready. Original code from: Austin Zhang <austin_zhang@linux.intel.com> It is currently disabled, but edit crc32c.h to turn it on. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Endianess bug fix for v0.13 with kernelsMiguel
Fix for a endianess BUG when using btrfs v0.13 with kernels older than 2.6.23 Problem: Has of v0.13, btrfs-progs is using crc32c.c equivalent to the one found on linux-2.6.23/lib/libcrc32c.c Since crc32c_le() changed in linux-2.6.23, when running btrfs v0.13 with older kernels we have a missmatch between the versions of crc32c_le() from btrfs-progs and libcrc32c in the kernel. This missmatch causes a bug when using btrfs on big endian machines. Solution: btrfs_crc32c() macro that when compiling for kernels older than 2.6.23, does endianess conversion to parameters and return value of crc32c(). This endianess conversion nullifies the differences in implementation of crc32c_le(). If kernel 2.6.23 or better, it calls crc32c(). Signed-off-by: Miguel Sousa Filipe <miguel.filipe@gmail.com> --- Signed-off-by: Chris Mason <chris.mason@oracle.com>