From patchwork Tue May 31 13:55:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 9144883 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 25F3660761 for ; Tue, 31 May 2016 13:55:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 194D624B5B for ; Tue, 31 May 2016 13:55:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0E40C2796F; Tue, 31 May 2016 13:55:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C6E2B24B5B for ; Tue, 31 May 2016 13:55:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753034AbcEaNzv (ORCPT ); Tue, 31 May 2016 09:55:51 -0400 Received: from mga09.intel.com ([134.134.136.24]:3350 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754140AbcEaNzs (ORCPT ); Tue, 31 May 2016 09:55:48 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP; 31 May 2016 06:55:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,395,1459839600"; d="scan'208";a="711598110" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by FMSMGA003.fm.intel.com with ESMTP; 31 May 2016 06:55:46 -0700 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 u4VDtjtv021993; Tue, 31 May 2016 14:55:45 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id u4VDtjKw028221; Tue, 31 May 2016 14:55:45 +0100 Received: (from gcabiddu@localhost) by sivswdev01.ir.intel.com with id u4VDtjDr028217; Tue, 31 May 2016 14:55:45 +0100 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, Giovanni Cabiddu Subject: [PATCH v4 07/10] crypto: acomp - add support for lz4hc via scomp Date: Tue, 31 May 2016 14:55:33 +0100 Message-Id: <1464702936-27627-8-git-send-email-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1464702936-27627-1-git-send-email-giovanni.cabiddu@intel.com> References: <1464702936-27627-1-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-Virus-Scanned: ClamAV using ClamSMTP This patch implements an scomp backend for the lz4hc compression algorithm. This way, lz4hc is exposed through the acomp api. Signed-off-by: Giovanni Cabiddu --- crypto/Kconfig | 1 + crypto/lz4hc.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++------ 2 files changed, 83 insertions(+), 10 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index 114d43b..59570da 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1539,6 +1539,7 @@ config CRYPTO_LZ4 config CRYPTO_LZ4HC tristate "LZ4HC compression algorithm" select CRYPTO_ALGAPI + select CRYPTO_ACOMP2 select LZ4HC_COMPRESS select LZ4_DECOMPRESS help diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c index a1d3b5b..068b06f 100644 --- a/crypto/lz4hc.c +++ b/crypto/lz4hc.c @@ -22,37 +22,53 @@ #include #include #include +#include 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 = vmalloc(LZ4HC_MEM_COMPRESS); - if (!ctx->lz4hc_comp_mem) + ctx->lz4hc_comp_mem = lz4hc_alloc_ctx(NULL); + if (IS_ERR(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); - vfree(ctx->lz4hc_comp_mem); + lz4hc_free_ctx(NULL, ctx->lz4hc_comp_mem); } -static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) { - struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm); size_t tmp_len = *dlen; int err; - err = lz4hc_compress(src, slen, dst, &tmp_len, ctx->lz4hc_comp_mem); + err = lz4hc_compress(src, slen, dst, &tmp_len, ctx); if (err < 0) return -EINVAL; @@ -61,8 +77,25 @@ static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src, return 0; } -static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, - unsigned int slen, u8 *dst, unsigned int *dlen) +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) { int err; size_t tmp_len = *dlen; @@ -76,6 +109,20 @@ static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, 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, @@ -89,14 +136,39 @@ 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) { - return crypto_register_alg(&alg_lz4hc); + int ret; + + ret = crypto_register_alg(&alg_lz4hc); + if (ret) + return ret; + + ret = crypto_register_scomp_qdecomp(&scomp); + if (ret) { + crypto_unregister_alg(&alg_lz4hc); + return ret; + } + + return ret; } static void __exit lz4hc_mod_fini(void) { crypto_unregister_alg(&alg_lz4hc); + crypto_unregister_scomp(&scomp); } module_init(lz4hc_mod_init);