Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Giovanni Cabiddu |
142 |
49.65% |
1 |
12.50% |
| Seth Jennings |
106 |
37.06% |
1 |
12.50% |
| Dan Streetman |
27 |
9.44% |
1 |
12.50% |
| Kees Cook |
4 |
1.40% |
1 |
12.50% |
| Ard Biesheuvel |
3 |
1.05% |
1 |
12.50% |
| Thomas Gleixner |
2 |
0.70% |
1 |
12.50% |
| Eric Biggers |
1 |
0.35% |
1 |
12.50% |
| Herbert Xu |
1 |
0.35% |
1 |
12.50% |
| Total |
286 |
|
8 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Cryptographic API for the 842 software compression algorithm.
*
* Copyright (C) IBM Corporation, 2011-2015
*
* Original Authors: Robert Jennings <rcj@linux.vnet.ibm.com>
* Seth Jennings <sjenning@linux.vnet.ibm.com>
*
* Rewrite: Dan Streetman <ddstreet@ieee.org>
*
* This is the software implementation of compression and decompression using
* the 842 format. This uses the software 842 library at lib/842/ which is
* only a reference implementation, and is very, very slow as compared to other
* software compressors. You probably do not want to use this software
* compression. If you have access to the PowerPC 842 compression hardware, you
* want to use the 842 hardware compression interface, which is at:
* drivers/crypto/nx/nx-842-crypto.c
*/
#include <crypto/internal/scompress.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/sw842.h>
struct crypto842_ctx {
void *wmem; /* working memory for compress */
};
static void *crypto842_alloc_ctx(void)
{
void *ctx;
ctx = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);
return ctx;
}
static void crypto842_free_ctx(void *ctx)
{
kfree(ctx);
}
static int crypto842_scompress(struct crypto_scomp *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
{
return sw842_compress(src, slen, dst, dlen, ctx);
}
static int crypto842_sdecompress(struct crypto_scomp *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
{
return sw842_decompress(src, slen, dst, dlen);
}
static struct scomp_alg scomp = {
.alloc_ctx = crypto842_alloc_ctx,
.free_ctx = crypto842_free_ctx,
.compress = crypto842_scompress,
.decompress = crypto842_sdecompress,
.base = {
.cra_name = "842",
.cra_driver_name = "842-scomp",
.cra_priority = 100,
.cra_module = THIS_MODULE,
}
};
static int __init crypto842_mod_init(void)
{
return crypto_register_scomp(&scomp);
}
subsys_initcall(crypto842_mod_init);
static void __exit crypto842_mod_exit(void)
{
crypto_unregister_scomp(&scomp);
}
module_exit(crypto842_mod_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("842 Software Compression Algorithm");
MODULE_ALIAS_CRYPTO("842");
MODULE_ALIAS_CRYPTO("842-generic");
MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>");