From patchwork Thu Aug 20 06:34:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joonsoo Kim X-Patchwork-Id: 7041011 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 3136DC05AC for ; Thu, 20 Aug 2015 06:37:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 57E712053C for ; Thu, 20 Aug 2015 06:37:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F1982053B for ; Thu, 20 Aug 2015 06:37:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751942AbbHTGfh (ORCPT ); Thu, 20 Aug 2015 02:35:37 -0400 Received: from mail-pa0-f51.google.com ([209.85.220.51]:35399 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752142AbbHTGfe (ORCPT ); Thu, 20 Aug 2015 02:35:34 -0400 Received: by pacdd16 with SMTP id dd16so12630264pac.2; Wed, 19 Aug 2015 23:35:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=4X6flb/AxJXpw0RcHhuKPOxJ/cOCJKnvjQ8gRUdxBJs=; b=dKuPEPVj2+FOny25TshIaoczdHGme+vI8eOUlWzC04ZQWf9oGBIZ+1lRcEHOa1vKlN 19ILfbQpU1t4GGK0M2nLmX+mDXvvYXxSFlrKelMZbBhaq/wB8lQE54Fe57HHrTD2QeID 3DZl8UYQjvlI+TT2drhgt51KH4oD2vPMVgD1tvkoVTflK2nHvPYxgfgBvPA1UVt6nly8 skU7N0NQlQDNKvnY8N6r85MqZMCBYy/Yuwc3qqlEcsquvyK69okeww5/mRy3re6dbJqt tArq3Yw0kpezLxRQNju5P/dcZi+JHd0rC7ebEzigq4yZaqXwo06IZqZpvkWLuPj3RHoJ CLjw== X-Received: by 10.66.186.39 with SMTP id fh7mr3365194pac.136.1440052534046; Wed, 19 Aug 2015 23:35:34 -0700 (PDT) Received: from localhost.localdomain ([119.69.155.222]) by smtp.gmail.com with ESMTPSA id v6sm3023378pdp.18.2015.08.19.23.35.29 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 19 Aug 2015 23:35:33 -0700 (PDT) From: Joonsoo Kim X-Google-Original-From: Joonsoo Kim To: Andrew Morton Cc: Minchan Kim , Nitin Gupta , Sergey Senozhatsky , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Herbert Xu , "David S. Miller" , Stephan Mueller , Joonsoo Kim Subject: [PATCH v2 3/8] crypyo/lz4: support decompress_noctx Date: Thu, 20 Aug 2015 15:34:59 +0900 Message-Id: <1440052504-15442-4-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1440052504-15442-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1440052504-15442-1-git-send-email-iamjoonsoo.kim@lge.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=-7.4 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, 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 lz4's decompression doesn't requires any scratch buffer so it doesn't need tfm context. Hence, it can support crypto compression noctx API and this patch implements it. Signed-off-by: Joonsoo Kim --- crypto/lz4.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/crypto/lz4.c b/crypto/lz4.c index 1848435..aa23da3 100644 --- a/crypto/lz4.c +++ b/crypto/lz4.c @@ -76,6 +76,21 @@ static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src, return err; } +static int lz4_decompress_noctx(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); + if (err < 0) + return -EINVAL; + + *dlen = tmp_len; + return err; +} + static struct crypto_alg alg_lz4 = { .cra_name = "lz4", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, @@ -88,7 +103,7 @@ static struct crypto_alg alg_lz4 = { .coa_compress = lz4_compress_crypto, .coa_decompress = lz4_decompress_crypto, .coa_compress_noctx = NULL, - .coa_decompress_noctx = NULL } } + .coa_decompress_noctx = lz4_decompress_noctx } } }; static int __init lz4_mod_init(void)