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crypto: acomp - add support for zstd via scomp

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Add scomp backend for zstd compression algorithm.
This commit is contained in:
xxmustafacooTR 2023-02-08 20:34:21 +03:00
parent ae36da3aff
commit cdffe8daa1
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GPG key ID: 520B6FE385CBF5C9
1 changed files with 56 additions and 1 deletions
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57
crypto/zstd.c
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@ -20,7 +20,7 @@
#include <linux/net.h>
#include <linux/vmalloc.h>
#include <linux/zstd.h>
#include <crypto/internal/scompress.h>
#define ZSTD_DEF_LEVEL 3
@ -110,6 +110,24 @@ static int __zstd_init(void *ctx)
return ret;
}
static void *zstd_alloc_ctx(struct crypto_scomp *tfm)
{
int ret;
struct zstd_ctx *ctx;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);
ret = __zstd_init(ctx);
if (ret) {
kfree(ctx);
return ERR_PTR(ret);
}
return ctx;
}
static int zstd_init(struct crypto_tfm *tfm)
{
struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
@ -123,6 +141,12 @@ static void __zstd_exit(void *ctx)
zstd_decomp_exit(ctx);
}
static void zstd_free_ctx(struct crypto_scomp *tfm, void *ctx)
{
__zstd_exit(ctx);
kfree(ctx);
}
static void zstd_exit(struct crypto_tfm *tfm)
{
struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
@ -152,6 +176,13 @@ static int zstd_compress(struct crypto_tfm *tfm, const u8 *src,
return __zstd_compress(src, slen, dst, dlen, ctx);
}
static int zstd_scompress(struct crypto_scomp *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx)
{
return __zstd_compress(src, slen, dst, dlen, ctx);
}
static int __zstd_decompress(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
{
@ -173,6 +204,13 @@ static int zstd_decompress(struct crypto_tfm *tfm, const u8 *src,
return __zstd_decompress(src, slen, dst, dlen, ctx);
}
static int zstd_sdecompress(struct crypto_scomp *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx)
{
return __zstd_decompress(src, slen, dst, dlen, ctx);
}
static struct crypto_alg alg = {
.cra_name = "zstd",
.cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
@ -185,6 +223,18 @@ static struct crypto_alg alg = {
.coa_decompress = zstd_decompress } }
};
static struct scomp_alg scomp = {
.alloc_ctx = zstd_alloc_ctx,
.free_ctx = zstd_free_ctx,
.compress = zstd_scompress,
.decompress = zstd_sdecompress,
.base = {
.cra_name = "zstd",
.cra_driver_name = "zstd-scomp",
.cra_module = THIS_MODULE,
}
};
static int __init zstd_mod_init(void)
{
int ret;
@ -193,12 +243,17 @@ static int __init zstd_mod_init(void)
if (ret)
return ret;
ret = crypto_register_scomp(&scomp);
if (ret)
crypto_unregister_alg(&alg);
return ret;
}
static void __exit zstd_mod_fini(void)
{
crypto_unregister_alg(&alg);
crypto_unregister_scomp(&scomp);
}
module_init(zstd_mod_init);