Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Chanho Min |
202 |
51.93% |
1 |
11.11% |
| Giovanni Cabiddu |
151 |
38.82% |
1 |
11.11% |
| Sven Schmidt |
22 |
5.66% |
1 |
11.11% |
| Kees Cook |
5 |
1.29% |
1 |
11.11% |
| Ard Biesheuvel |
3 |
0.77% |
1 |
11.11% |
| Herbert Xu |
2 |
0.51% |
2 |
22.22% |
| Myungho Jung |
2 |
0.51% |
1 |
11.11% |
| Thomas Gleixner |
2 |
0.51% |
1 |
11.11% |
| Total |
389 |
|
9 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Cryptographic API.
*
* Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
*/
#include <crypto/internal/scompress.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/lz4.h>
static void *lz4hc_alloc_ctx(void)
{
void *ctx;
ctx = vmalloc(LZ4HC_MEM_COMPRESS);
if (!ctx)
return ERR_PTR(-ENOMEM);
return ctx;
}
static void lz4hc_free_ctx(void *ctx)
{
vfree(ctx);
}
static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
{
int out_len = LZ4_compress_HC(src, dst, slen,
*dlen, LZ4HC_DEFAULT_CLEVEL, ctx);
if (!out_len)
return -EINVAL;
*dlen = out_len;
return 0;
}
static int lz4hc_scompress(struct crypto_scomp *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx)
{
return __lz4hc_compress_crypto(src, slen, dst, dlen, ctx);
}
static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
{
int out_len = LZ4_decompress_safe(src, dst, slen, *dlen);
if (out_len < 0)
return -EINVAL;
*dlen = out_len;
return 0;
}
static int lz4hc_sdecompress(struct crypto_scomp *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx)
{
return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
}
static struct scomp_alg scomp = {
.alloc_ctx = lz4hc_alloc_ctx,
.free_ctx = lz4hc_free_ctx,
.compress = lz4hc_scompress,
.decompress = lz4hc_sdecompress,
.base = {
.cra_name = "lz4hc",
.cra_driver_name = "lz4hc-scomp",
.cra_module = THIS_MODULE,
}
};
static int __init lz4hc_mod_init(void)
{
return crypto_register_scomp(&scomp);
}
static void __exit lz4hc_mod_fini(void)
{
crypto_unregister_scomp(&scomp);
}
module_init(lz4hc_mod_init);
module_exit(lz4hc_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
MODULE_ALIAS_CRYPTO("lz4hc");