mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-10-31 08:44:41 +00:00
ef93f15628
This reverts commit c4741b2305.
Crypto API self-tests no longer run at registration time and now
occur either at late_initcall or upon the first use.
Therefore the premise of the above commit no longer exists. Revert
it and subsequent additions of subsys_initcall and arch_initcall.
Note that lib/crypto calls will stay at subsys_initcall (or rather
downgraded from arch_initcall) because they may need to occur
before Crypto API registration.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
95 lines
2 KiB
C
95 lines
2 KiB
C
// 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");
|