Release 4.7 lib/crc-t10dif.c
/*
* T10 Data Integrity Field CRC16 calculation
*
* Copyright (c) 2007 Oracle Corporation. All rights reserved.
* Written by Martin K. Petersen <martin.petersen@oracle.com>
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/crc-t10dif.h>
#include <linux/err.h>
#include <linux/init.h>
#include <crypto/hash.h>
#include <linux/static_key.h>
static struct crypto_shash *crct10dif_tfm;
static struct static_key crct10dif_fallback __read_mostly;
__u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len)
{
struct {
struct shash_desc shash;
char ctx[2];
} desc;
int err;
if (static_key_false(&crct10dif_fallback))
return crc_t10dif_generic(crc, buffer, len);
desc.shash.tfm = crct10dif_tfm;
desc.shash.flags = 0;
*(__u16 *)desc.ctx = crc;
err = crypto_shash_update(&desc.shash, buffer, len);
BUG_ON(err);
return *(__u16 *)desc.ctx;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
herbert xu | herbert xu | 82 | 75.23% | 3 | 50.00% |
martin k. petersen | martin k. petersen | 20 | 18.35% | 1 | 16.67% |
akinobu mita | akinobu mita | 6 | 5.50% | 1 | 16.67% |
tim chen | tim chen | 1 | 0.92% | 1 | 16.67% |
| Total | 109 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL(crc_t10dif_update);
__u16 crc_t10dif(const unsigned char *buffer, size_t len)
{
return crc_t10dif_update(0, buffer, len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
akinobu mita | akinobu mita | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(crc_t10dif);
static int __init crc_t10dif_mod_init(void)
{
crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
if (IS_ERR(crct10dif_tfm)) {
static_key_slow_inc(&crct10dif_fallback);
crct10dif_tfm = NULL;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
herbert xu | herbert xu | 42 | 100.00% | 2 | 100.00% |
| Total | 42 | 100.00% | 2 | 100.00% |
static void __exit crc_t10dif_mod_fini(void)
{
crypto_free_shash(crct10dif_tfm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
herbert xu | herbert xu | 14 | 100.00% | 1 | 100.00% |
| Total | 14 | 100.00% | 1 | 100.00% |
module_init(crc_t10dif_mod_init);
module_exit(crc_t10dif_mod_fini);
MODULE_DESCRIPTION("T10 DIF CRC calculation");
MODULE_LICENSE("GPL");
MODULE_SOFTDEP("pre: crct10dif");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
herbert xu | herbert xu | 175 | 67.83% | 3 | 50.00% |
martin k. petersen | martin k. petersen | 47 | 18.22% | 1 | 16.67% |
akinobu mita | akinobu mita | 35 | 13.57% | 1 | 16.67% |
tim chen | tim chen | 1 | 0.39% | 1 | 16.67% |
| Total | 258 | 100.00% | 6 | 100.00% |
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