cregit-Linux how code gets into the kernel

Release 4.7 include/linux/crc32.h

Directory: include/linux
/*
 * crc32.h
 * See linux/lib/crc32.c for license and changes
 */
#ifndef _LINUX_CRC32_H

#define _LINUX_CRC32_H

#include <linux/types.h>
#include <linux/bitrev.h>

u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len);
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len);

/**
 * crc32_le_combine - Combine two crc32 check values into one. For two
 *                    sequences of bytes, seq1 and seq2 with lengths len1
 *                    and len2, crc32_le() check values were calculated
 *                    for each, crc1 and crc2.
 *
 * @crc1: crc32 of the first block
 * @crc2: crc32 of the second block
 * @len2: length of the second block
 *
 * Return: The crc32_le() check value of seq1 and seq2 concatenated,
 *         requiring only crc1, crc2, and len2. Note: If seq_full denotes
 *         the concatenated memory area of seq1 with seq2, and crc_full
 *         the crc32_le() value of seq_full, then crc_full ==
 *         crc32_le_combine(crc1, crc2, len2) when crc_full was seeded
 *         with the same initializer as crc1, and crc2 seed was 0. See
 *         also crc32_combine_test().
 */
u32 __attribute_const__ crc32_le_shift(u32 crc, size_t len);


static inline u32 crc32_le_combine(u32 crc1, u32 crc2, size_t len2) { return crc32_le_shift(crc1, len2) ^ crc2; }

Contributors

PersonTokensPropCommitsCommitProp
george spelvingeorge spelvin1453.85%150.00%
daniel borkmanndaniel borkmann1246.15%150.00%
Total26100.00%2100.00%

u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len); /** * __crc32c_le_combine - Combine two crc32c check values into one. For two * sequences of bytes, seq1 and seq2 with lengths len1 * and len2, __crc32c_le() check values were calculated * for each, crc1 and crc2. * * @crc1: crc32c of the first block * @crc2: crc32c of the second block * @len2: length of the second block * * Return: The __crc32c_le() check value of seq1 and seq2 concatenated, * requiring only crc1, crc2, and len2. Note: If seq_full denotes * the concatenated memory area of seq1 with seq2, and crc_full * the __crc32c_le() value of seq_full, then crc_full == * __crc32c_le_combine(crc1, crc2, len2) when crc_full was * seeded with the same initializer as crc1, and crc2 seed * was 0. See also crc32c_combine_test(). */ u32 __attribute_const__ __crc32c_le_shift(u32 crc, size_t len);
static inline u32 __crc32c_le_combine(u32 crc1, u32 crc2, size_t len2) { return __crc32c_le_shift(crc1, len2) ^ crc2; }

Contributors

PersonTokensPropCommitsCommitProp
george spelvingeorge spelvin1453.85%150.00%
daniel borkmanndaniel borkmann1246.15%150.00%
Total26100.00%2100.00%

#define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)(data), length) /* * Helpers for hash table generation of ethernet nics: * * Ethernet sends the least significant bit of a byte first, thus crc32_le * is used. The output of crc32_le is bit reversed [most significant bit * is in bit nr 0], thus it must be reversed before use. Except for * nics that bit swap the result internally... */ #define ether_crc(length, data) bitrev32(crc32_le(~0, data, length)) #define ether_crc_le(length, data) crc32_le(~0, data, length) #endif /* _LINUX_CRC32_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds6939.88%112.50%
george spelvingeorge spelvin5330.64%225.00%
daniel borkmanndaniel borkmann2615.03%112.50%
darrick j. wongdarrick j. wong169.25%112.50%
akinobu mitaakinobu mita42.31%112.50%
jeff garzikjeff garzik42.31%112.50%
konstantin khlebnikovkonstantin khlebnikov10.58%112.50%
Total173100.00%8100.00%
Directory: include/linux
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