From patchwork Wed Feb 24 17:51:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 8410491 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id ABB6A9F52D for ; Wed, 24 Feb 2016 17:52:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A85662025B for ; Wed, 24 Feb 2016 17:52:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B387420361 for ; Wed, 24 Feb 2016 17:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751856AbcBXRwT (ORCPT ); Wed, 24 Feb 2016 12:52:19 -0500 Received: from mga04.intel.com ([192.55.52.120]:9117 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752085AbcBXRwS (ORCPT ); Wed, 24 Feb 2016 12:52:18 -0500 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP; 24 Feb 2016 09:52:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,494,1449561600"; d="scan'208";a="658668697" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by FMSMGA003.fm.intel.com with ESMTP; 24 Feb 2016 09:52:16 -0800 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id u1OHqE8B002148; Wed, 24 Feb 2016 17:52:14 GMT Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id u1OHqE8G005252; Wed, 24 Feb 2016 17:52:14 GMT Received: (from gcabiddu@localhost) by sivswdev01.ir.intel.com with id u1OHqEno005248; Wed, 24 Feb 2016 17:52:14 GMT From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, Giovanni Cabiddu Subject: [PATCH v3 4/8] crypto: acomp - add support for lz4 via scomp Date: Wed, 24 Feb 2016 17:51:46 +0000 Message-Id: <1456336310-3737-5-git-send-email-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1456336310-3737-1-git-send-email-giovanni.cabiddu@intel.com> References: <20160216195717.GA4207@gondor.apana.org.au> <1456336310-3737-1-git-send-email-giovanni.cabiddu@intel.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch implements an scomp backend for the lz4 compression algorithm. This way, lz4 is exposed through the acomp api. Signed-off-by: Giovanni Cabiddu --- crypto/Kconfig | 1 + crypto/lz4.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++------ 2 files changed, 84 insertions(+), 10 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index c15070d8..8374bee 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1527,6 +1527,7 @@ config CRYPTO_842 config CRYPTO_LZ4 tristate "LZ4 compression algorithm" select CRYPTO_ALGAPI + select CRYPTO_ACOMP2 select LZ4_COMPRESS select LZ4_DECOMPRESS help diff --git a/crypto/lz4.c b/crypto/lz4.c index aefbcea..a9fc214 100644 --- a/crypto/lz4.c +++ b/crypto/lz4.c @@ -23,36 +23,53 @@ #include #include #include +#include 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 = vmalloc(LZ4_MEM_COMPRESS); - if (!ctx->lz4_comp_mem) + ctx->lz4_comp_mem = lz4_alloc_ctx(NULL); + if (IS_ERR(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); - vfree(ctx->lz4_comp_mem); + + lz4_free_ctx(NULL, ctx->lz4_comp_mem); } -static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +static int __lz4_compress_crypto(const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) { - struct lz4_ctx *ctx = crypto_tfm_ctx(tfm); size_t tmp_len = *dlen; int err; - err = lz4_compress(src, slen, dst, &tmp_len, ctx->lz4_comp_mem); + err = lz4_compress(src, slen, dst, &tmp_len, ctx); if (err < 0) return -EINVAL; @@ -61,8 +78,23 @@ static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src, return 0; } -static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +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) { int err; size_t tmp_len = *dlen; @@ -76,6 +108,20 @@ static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, 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, @@ -89,14 +135,41 @@ 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_flags = CRYPTO_ALG_TYPE_SCOMPRESS | + CRYPTO_SCOMP_DECOMP_NOCTX, + .cra_module = THIS_MODULE, + } +}; + static int __init lz4_mod_init(void) { - return crypto_register_alg(&alg_lz4); + 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; } static void __exit lz4_mod_fini(void) { crypto_unregister_alg(&alg_lz4); + crypto_unregister_scomp(&scomp); } module_init(lz4_mod_init);