Release 4.9 lib/libcrc32c.c
/*
* CRC32C
*@Article{castagnoli-crc,
* author = { Guy Castagnoli and Stefan Braeuer and Martin Herrman},
* title = {{Optimization of Cyclic Redundancy-Check Codes with 24
* and 32 Parity Bits}},
* journal = IEEE Transactions on Communication,
* year = {1993},
* volume = {41},
* number = {6},
* pages = {},
* month = {June},
*}
* Used by the iSCSI driver, possibly others, and derived from the
* the iscsi-crc.c module of the linux-iscsi driver at
* http://linux-iscsi.sourceforge.net.
*
* Following the example of lib/crc32, this function is intended to be
* flexible and useful for all users. Modules that currently have their
* own crc32c, but hopefully may be able to use this one are:
* net/sctp (please add all your doco to here if you change to
* use this one!)
* <endoflist>
*
* Copyright (c) 2004 Cisco Systems, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/hash.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/crc32c.h>
static struct crypto_shash *tfm;
u32 crc32c(u32 crc, const void *address, unsigned int length)
{
SHASH_DESC_ON_STACK(shash, tfm);
u32 *ctx = (u32 *)shash_desc_ctx(shash);
int err;
shash->tfm = tfm;
shash->flags = 0;
*ctx = crc;
err = crypto_shash_update(shash, address, length);
BUG_ON(err);
return *ctx;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 40 | 51.95% | 1 | 33.33% |
| clay haapala | clay haapala | 20 | 25.97% | 1 | 33.33% |
| jan-simon moller | jan-simon moller | 17 | 22.08% | 1 | 33.33% |
| Total | 77 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(crc32c);
static int __init libcrc32c_mod_init(void)
{
tfm = crypto_alloc_shash("crc32c", 0, 0);
return PTR_ERR_OR_ZERO(tfm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 18 | 69.23% | 1 | 33.33% |
| clay haapala | clay haapala | 7 | 26.92% | 1 | 33.33% |
| fabian frederick | fabian frederick | 1 | 3.85% | 1 | 33.33% |
| Total | 26 | 100.00% | 3 | 100.00% |
static void __exit libcrc32c_mod_fini(void)
{
crypto_free_shash(tfm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 9 | 64.29% | 1 | 50.00% |
| clay haapala | clay haapala | 5 | 35.71% | 1 | 50.00% |
| Total | 14 | 100.00% | 2 | 100.00% |
module_init(libcrc32c_mod_init);
module_exit(libcrc32c_mod_fini);
MODULE_AUTHOR("Clay Haapala <chaapala@cisco.com>");
MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations");
MODULE_LICENSE("GPL");
MODULE_SOFTDEP("pre: crc32c");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 106 | 59.89% | 1 | 14.29% |
| clay haapala | clay haapala | 40 | 22.60% | 1 | 14.29% |
| jan-simon moller | jan-simon moller | 17 | 9.60% | 1 | 14.29% |
| jean delvare | jean delvare | 8 | 4.52% | 2 | 28.57% |
| adrian-ken rueegsegger | adrian-ken rueegsegger | 5 | 2.82% | 1 | 14.29% |
| fabian frederick | fabian frederick | 1 | 0.56% | 1 | 14.29% |
| Total | 177 | 100.00% | 7 | 100.00% |