From: Joonsoo Kim Subject: [PATCH RFC 4/7] crypto/lzo: support SCOMPRESS alg type Date: Mon, 4 Jan 2016 13:46:55 +0900 Message-ID: <1451882819-2810-5-git-send-email-iamjoonsoo.kim@lge.com> References: <1451882819-2810-1-git-send-email-iamjoonsoo.kim@lge.com> Cc: "David S. Miller" , Weigang Li , Sergey Senozhatsky , Minchan Kim , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, Joonsoo Kim To: Herbert Xu Return-path: Received: from mail-pf0-f172.google.com ([209.85.192.172]:36018 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752709AbcADEra (ORCPT ); Sun, 3 Jan 2016 23:47:30 -0500 In-Reply-To: <1451882819-2810-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: For proof of concept, SCOMPRESS alg type is implemented for lzo. Signed-off-by: Joonsoo Kim --- crypto/Kconfig | 1 + crypto/lzo.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++-------- 2 files changed, 82 insertions(+), 13 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index f22f4e9..b4b485c 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1503,6 +1503,7 @@ config CRYPTO_LZO select CRYPTO_ALGAPI select LZO_COMPRESS select LZO_DECOMPRESS + select CRYPTO_COMPRESS2 help This is the LZO algorithm. diff --git a/crypto/lzo.c b/crypto/lzo.c index 4b3e925..47998e9 100644 --- a/crypto/lzo.c +++ b/crypto/lzo.c @@ -23,39 +23,56 @@ #include #include +#include + struct lzo_ctx { void *lzo_comp_mem; }; +static void *lzo_alloc_ctx(struct crypto_scomp *tfm) +{ + void *ctx; + + ctx = kmalloc(LZO1X_MEM_COMPRESS, + GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); + if (!ctx) + ctx = vmalloc(LZO1X_MEM_COMPRESS); + if (!ctx) + return ERR_PTR(-ENOMEM); + + return ctx; +} + static int lzo_init(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); - ctx->lzo_comp_mem = kmalloc(LZO1X_MEM_COMPRESS, - GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); - if (!ctx->lzo_comp_mem) - ctx->lzo_comp_mem = vmalloc(LZO1X_MEM_COMPRESS); - if (!ctx->lzo_comp_mem) + ctx->lzo_comp_mem = lzo_alloc_ctx(NULL); + if (IS_ERR(ctx->lzo_comp_mem)) return -ENOMEM; return 0; } +static void lzo_free_ctx(struct crypto_scomp *tfm, void *ctx) +{ + kvfree(ctx); +} + static void lzo_exit(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); - kvfree(ctx->lzo_comp_mem); + lzo_free_ctx(NULL, ctx->lzo_comp_mem); } -static int lzo_compress(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +static int __lzo_compress(const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) { - struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ int err; - err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lzo_comp_mem); + err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx); if (err != LZO_E_OK) return -EINVAL; @@ -64,8 +81,22 @@ static int lzo_compress(struct crypto_tfm *tfm, const u8 *src, return 0; } -static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +static int lzo_compress(struct crypto_tfm *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen) +{ + struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); + + return __lzo_compress(src, slen, dst, dlen, ctx->lzo_comp_mem); +} + +static int lzo_scompress(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) +{ + return __lzo_compress(src, slen, dst, dlen, ctx); +} + +static int __lzo_decompress(const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen) { int err; size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ @@ -77,7 +108,18 @@ static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src, *dlen = tmp_len; return 0; +} + +static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen) +{ + return __lzo_decompress(src, slen, dst, dlen); +} +static int lzo_sdecompress(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, void *ctx) +{ + return __lzo_decompress(src, slen, dst, dlen); } static struct crypto_alg alg = { @@ -92,14 +134,40 @@ static struct crypto_alg alg = { .coa_decompress = lzo_decompress } } }; +static struct scomp_alg scomp = { + .alloc_ctx = lzo_alloc_ctx, + .free_ctx = lzo_free_ctx, + .compress = lzo_scompress, + .decompress = lzo_sdecompress, + .base = { + .cra_name = "lzo", + .cra_driver_name= "lzo-scomp", + .cra_flags = CRYPTO_ALG_TYPE_SCOMPRESS, + .cra_module = THIS_MODULE, + } +}; + static int __init lzo_mod_init(void) { - return crypto_register_alg(&alg); + int ret; + + ret = crypto_register_alg(&alg); + if (ret) + return ret; + + ret = crypto_register_scomp(&scomp); + if (ret) { + crypto_unregister_alg(&alg); + return ret; + } + + return ret; } static void __exit lzo_mod_fini(void) { crypto_unregister_alg(&alg); + crypto_unregister_scomp(&scomp); } module_init(lzo_mod_init); -- 1.9.1