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Date: Thu, 22 Dec 2016 22:25:16 +0900
From: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To: Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>
Cc: akpm@...ux-foundation.org, bongkyu.kim@....com,
sergey.senozhatsky@...il.com, gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org,
Herbert Xu <herbert@...dor.apana.org.au>,
linux-crypto@...r.kernel.org
Subject: Re: [PATCH 1/3] crypto: Change lz4 modules to work with new lz4
compressor module version
Cc Herbert and linux-crypto on this
https://marc.info/?l=linux-kernel&m=148226084823926
On (12/20/16 19:53), Sven Schmidt wrote:
>
> This patch updates the crypto modules using LZ4 compression to work with the
> new LZ4 kernel module version.
>
> Signed-off-by: Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>
> ---
> crypto/lz4.c | 93 +++++++--------------------------------------------------
> crypto/lz4hc.c | 94 +++++++---------------------------------------------------
> 2 files changed, 22 insertions(+), 165 deletions(-)
>
> diff --git a/crypto/lz4.c b/crypto/lz4.c
> index 99c1b2c..9fa217e 100644
> --- a/crypto/lz4.c
> +++ b/crypto/lz4.c
> @@ -23,53 +23,36 @@
> #include <linux/crypto.h>
> #include <linux/vmalloc.h>
> #include <linux/lz4.h>
> -#include <crypto/internal/scompress.h>
>
> struct lz4_ctx {
> void *lz4_comp_mem;
> };
>
> -static void *lz4_alloc_ctx(struct crypto_scomp *tfm)
> -{
> - void *ctx;
> -
> - ctx = vmalloc(LZ4_MEM_COMPRESS);
> - if (!ctx)
> - return ERR_PTR(-ENOMEM);
> -
> - return ctx;
> -}
> -
> static int lz4_init(struct crypto_tfm *tfm)
> {
> struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
>
> - ctx->lz4_comp_mem = lz4_alloc_ctx(NULL);
> - if (IS_ERR(ctx->lz4_comp_mem))
> + ctx->lz4_comp_mem = vmalloc(LZ4_MEM_COMPRESS);
> + if (!ctx->lz4_comp_mem)
> return -ENOMEM;
>
> return 0;
> }
>
> -static void lz4_free_ctx(struct crypto_scomp *tfm, void *ctx)
> -{
> - vfree(ctx);
> -}
> -
> static void lz4_exit(struct crypto_tfm *tfm)
> {
> struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
> -
> - lz4_free_ctx(NULL, ctx->lz4_comp_mem);
> + vfree(ctx->lz4_comp_mem);
> }
>
> -static int __lz4_compress_crypto(const u8 *src, unsigned int slen,
> - u8 *dst, unsigned int *dlen, void *ctx)
> +static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
> + unsigned int slen, u8 *dst, unsigned int *dlen)
> {
> + struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
> size_t tmp_len = *dlen;
> int err;
>
> - err = lz4_compress(src, slen, dst, &tmp_len, ctx);
> + err = LZ4_compress_default(src, dst, slen, tmp_len, ctx->lz4_comp_mem);
>
> if (err < 0)
> return -EINVAL;
> @@ -78,29 +61,14 @@ static int __lz4_compress_crypto(const u8 *src, unsigned int slen,
> return 0;
> }
>
> -static int lz4_scompress(struct crypto_scomp *tfm, const u8 *src,
> - unsigned int slen, u8 *dst, unsigned int *dlen,
> - void *ctx)
> -{
> - return __lz4_compress_crypto(src, slen, dst, dlen, ctx);
> -}
> -
> -static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
> - unsigned int slen, u8 *dst, unsigned int *dlen)
> -{
> - struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
> -
> - return __lz4_compress_crypto(src, slen, dst, dlen, ctx->lz4_comp_mem);
> -}
> -
> -static int __lz4_decompress_crypto(const u8 *src, unsigned int slen,
> - u8 *dst, unsigned int *dlen, void *ctx)
> +static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
> + unsigned int slen, u8 *dst, unsigned int *dlen)
> {
> int err;
> size_t tmp_len = *dlen;
> size_t __slen = slen;
>
> - err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
> + err = LZ4_decompress_safe(src, dst, __slen, tmp_len);
> if (err < 0)
> return -EINVAL;
>
> @@ -108,20 +76,6 @@ static int __lz4_decompress_crypto(const u8 *src, unsigned int slen,
> return err;
> }
>
> -static int lz4_sdecompress(struct crypto_scomp *tfm, const u8 *src,
> - unsigned int slen, u8 *dst, unsigned int *dlen,
> - void *ctx)
> -{
> - return __lz4_decompress_crypto(src, slen, dst, dlen, NULL);
> -}
> -
> -static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
> - unsigned int slen, u8 *dst,
> - unsigned int *dlen)
> -{
> - return __lz4_decompress_crypto(src, slen, dst, dlen, NULL);
> -}
> -
> static struct crypto_alg alg_lz4 = {
> .cra_name = "lz4",
> .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
> @@ -135,39 +89,14 @@ static struct crypto_alg alg_lz4 = {
> .coa_decompress = lz4_decompress_crypto } }
> };
>
> -static struct scomp_alg scomp = {
> - .alloc_ctx = lz4_alloc_ctx,
> - .free_ctx = lz4_free_ctx,
> - .compress = lz4_scompress,
> - .decompress = lz4_sdecompress,
> - .base = {
> - .cra_name = "lz4",
> - .cra_driver_name = "lz4-scomp",
> - .cra_module = THIS_MODULE,
> - }
> -};
> -
> static int __init lz4_mod_init(void)
> {
> - int ret;
> -
> - ret = crypto_register_alg(&alg_lz4);
> - if (ret)
> - return ret;
> -
> - ret = crypto_register_scomp(&scomp);
> - if (ret) {
> - crypto_unregister_alg(&alg_lz4);
> - return ret;
> - }
> -
> - return ret;
> + return crypto_register_alg(&alg_lz4);
> }
>
> static void __exit lz4_mod_fini(void)
> {
> crypto_unregister_alg(&alg_lz4);
> - crypto_unregister_scomp(&scomp);
> }
>
> module_init(lz4_mod_init);
> diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
> index 75ffc4a..aa1265c 100644
> --- a/crypto/lz4hc.c
> +++ b/crypto/lz4hc.c
> @@ -22,53 +22,37 @@
> #include <linux/crypto.h>
> #include <linux/vmalloc.h>
> #include <linux/lz4.h>
> -#include <crypto/internal/scompress.h>
>
> struct lz4hc_ctx {
> void *lz4hc_comp_mem;
> };
>
> -static void *lz4hc_alloc_ctx(struct crypto_scomp *tfm)
> -{
> - void *ctx;
> -
> - ctx = vmalloc(LZ4HC_MEM_COMPRESS);
> - if (!ctx)
> - return ERR_PTR(-ENOMEM);
> -
> - return ctx;
> -}
> -
> static int lz4hc_init(struct crypto_tfm *tfm)
> {
> struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
>
> - ctx->lz4hc_comp_mem = lz4hc_alloc_ctx(NULL);
> - if (IS_ERR(ctx->lz4hc_comp_mem))
> + ctx->lz4hc_comp_mem = vmalloc(LZ4HC_MEM_COMPRESS);
> + if (!ctx->lz4hc_comp_mem)
> return -ENOMEM;
>
> return 0;
> }
>
> -static void lz4hc_free_ctx(struct crypto_scomp *tfm, void *ctx)
> -{
> - vfree(ctx);
> -}
> -
> static void lz4hc_exit(struct crypto_tfm *tfm)
> {
> struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
>
> - lz4hc_free_ctx(NULL, ctx->lz4hc_comp_mem);
> + vfree(ctx->lz4hc_comp_mem);
> }
>
> -static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
> - u8 *dst, unsigned int *dlen, void *ctx)
> +static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
> + unsigned int slen, u8 *dst, unsigned int *dlen)
> {
> + struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
> size_t tmp_len = *dlen;
> int err;
>
> - err = lz4hc_compress(src, slen, dst, &tmp_len, ctx);
> + err = LZ4_compress_HC(src, dst, slen, tmp_len, LZ4HC_DEFAULT_CLEVEL, ctx->lz4hc_comp_mem);
>
> if (err < 0)
> return -EINVAL;
> @@ -77,31 +61,14 @@ static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
> 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_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
> - unsigned int slen, u8 *dst,
> - unsigned int *dlen)
> -{
> - struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
> -
> - return __lz4hc_compress_crypto(src, slen, dst, dlen,
> - ctx->lz4hc_comp_mem);
> -}
> -
> -static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
> - u8 *dst, unsigned int *dlen, void *ctx)
> +static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
> + unsigned int slen, u8 *dst, unsigned int *dlen)
> {
> int err;
> size_t tmp_len = *dlen;
> size_t __slen = slen;
>
> - err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
> + err = LZ4_decompress_safe(src, dst, __slen, (int)tmp_len);
> if (err < 0)
> return -EINVAL;
>
> @@ -109,20 +76,6 @@ static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
> return err;
> }
>
> -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 int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
> - unsigned int slen, u8 *dst,
> - unsigned int *dlen)
> -{
> - return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
> -}
> -
> static struct crypto_alg alg_lz4hc = {
> .cra_name = "lz4hc",
> .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
> @@ -136,39 +89,14 @@ static struct crypto_alg alg_lz4hc = {
> .coa_decompress = lz4hc_decompress_crypto } }
> };
>
> -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)
> {
> - int ret;
> -
> - ret = crypto_register_alg(&alg_lz4hc);
> - if (ret)
> - return ret;
> -
> - ret = crypto_register_scomp(&scomp);
> - if (ret) {
> - crypto_unregister_alg(&alg_lz4hc);
> - return ret;
> - }
> -
> - return ret;
> + return crypto_register_alg(&alg_lz4hc);
> }
>
> static void __exit lz4hc_mod_fini(void)
> {
> crypto_unregister_alg(&alg_lz4hc);
> - crypto_unregister_scomp(&scomp);
> }
>
> module_init(lz4hc_mod_init);
> --
> 2.1.4
>
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