From patchwork Sat May 6 12:59:58 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gilad Ben-Yossef X-Patchwork-Id: 9714803 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 AD18A60234 for ; Sat, 6 May 2017 13:02:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9325A22638 for ; Sat, 6 May 2017 13:02:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 871E428668; Sat, 6 May 2017 13:02:50 +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=unavailable 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 1EB7322638 for ; Sat, 6 May 2017 13:02:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753191AbdEFNC3 (ORCPT ); Sat, 6 May 2017 09:02:29 -0400 Received: from foss.arm.com ([217.140.101.70]:59376 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755350AbdEFNBr (ORCPT ); Sat, 6 May 2017 09:01:47 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C5E1A168F; Sat, 6 May 2017 06:01:36 -0700 (PDT) Received: from localhost.localdomain (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 524C13F41F; Sat, 6 May 2017 06:01:30 -0700 (PDT) From: Gilad Ben-Yossef To: Herbert Xu , "David S. Miller" , Jonathan Corbet , David Howells , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Shaohua Li , Steve French , "Theodore Y. Ts'o" , Jaegeuk Kim , Mimi Zohar , Dmitry Kasatkin , James Morris , "Serge E. Hallyn" Cc: Ofir Drang , Gilad Ben-Yossef , linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-raid@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-fsdevel@vger.kernel.org, linux-ima-devel@lists.sourceforge.net, linux-ima-user@lists.sourceforge.net, linux-security-module@vger.kernel.org Subject: [RFC 09/10] ima: move to generic async completion Date: Sat, 6 May 2017 15:59:58 +0300 Message-Id: <1494075602-5061-10-git-send-email-gilad@benyossef.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1494075602-5061-1-git-send-email-gilad@benyossef.com> References: <1494075602-5061-1-git-send-email-gilad@benyossef.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP ima starts several async. crypto ops and waits for their completions. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef Acked-by: Mimi Zohar --- security/integrity/ima/ima_crypto.c | 56 +++++++++++-------------------------- 1 file changed, 17 insertions(+), 39 deletions(-) diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 802d5d2..0e4db1fe 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -27,11 +27,6 @@ #include "ima.h" -struct ahash_completion { - struct completion completion; - int err; -}; - /* minimum file size for ahash use */ static unsigned long ima_ahash_minsize; module_param_named(ahash_minsize, ima_ahash_minsize, ulong, 0644); @@ -196,30 +191,13 @@ static void ima_free_atfm(struct crypto_ahash *tfm) crypto_free_ahash(tfm); } -static void ahash_complete(struct crypto_async_request *req, int err) +static inline int ahash_wait(int err, struct crypto_wait *wait) { - struct ahash_completion *res = req->data; - if (err == -EINPROGRESS) - return; - res->err = err; - complete(&res->completion); -} + err = crypto_wait_req(err, wait); -static int ahash_wait(int err, struct ahash_completion *res) -{ - switch (err) { - case 0: - break; - case -EINPROGRESS: - case -EBUSY: - wait_for_completion(&res->completion); - reinit_completion(&res->completion); - err = res->err; - /* fall through */ - default: + if (err) pr_crit_ratelimited("ahash calculation failed: err: %d\n", err); - } return err; } @@ -233,7 +211,7 @@ static int ima_calc_file_hash_atfm(struct file *file, int rc, read = 0, rbuf_len, active = 0, ahash_rc = 0; struct ahash_request *req; struct scatterlist sg[1]; - struct ahash_completion res; + struct crypto_wait wait; size_t rbuf_size[2]; hash->length = crypto_ahash_digestsize(tfm); @@ -242,12 +220,12 @@ static int ima_calc_file_hash_atfm(struct file *file, if (!req) return -ENOMEM; - init_completion(&res.completion); + crypto_init_wait(&wait); ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - ahash_complete, &res); + crypto_req_done, &wait); - rc = ahash_wait(crypto_ahash_init(req), &res); + rc = ahash_wait(crypto_ahash_init(req), &wait); if (rc) goto out1; @@ -288,7 +266,7 @@ static int ima_calc_file_hash_atfm(struct file *file, * read/request, wait for the completion of the * previous ahash_update() request. */ - rc = ahash_wait(ahash_rc, &res); + rc = ahash_wait(ahash_rc, &wait); if (rc) goto out3; } @@ -304,7 +282,7 @@ static int ima_calc_file_hash_atfm(struct file *file, * read/request, wait for the completion of the * previous ahash_update() request. */ - rc = ahash_wait(ahash_rc, &res); + rc = ahash_wait(ahash_rc, &wait); if (rc) goto out3; } @@ -318,7 +296,7 @@ static int ima_calc_file_hash_atfm(struct file *file, active = !active; /* swap buffers, if we use two */ } /* wait for the last update request to complete */ - rc = ahash_wait(ahash_rc, &res); + rc = ahash_wait(ahash_rc, &wait); out3: if (read) file->f_mode &= ~FMODE_READ; @@ -327,7 +305,7 @@ static int ima_calc_file_hash_atfm(struct file *file, out2: if (!rc) { ahash_request_set_crypt(req, NULL, hash->digest, 0); - rc = ahash_wait(crypto_ahash_final(req), &res); + rc = ahash_wait(crypto_ahash_final(req), &wait); } out1: ahash_request_free(req); @@ -527,7 +505,7 @@ static int calc_buffer_ahash_atfm(const void *buf, loff_t len, { struct ahash_request *req; struct scatterlist sg; - struct ahash_completion res; + struct crypto_wait wait; int rc, ahash_rc = 0; hash->length = crypto_ahash_digestsize(tfm); @@ -536,12 +514,12 @@ static int calc_buffer_ahash_atfm(const void *buf, loff_t len, if (!req) return -ENOMEM; - init_completion(&res.completion); + crypto_init_wait(&wait); ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - ahash_complete, &res); + crypto_req_done, &wait); - rc = ahash_wait(crypto_ahash_init(req), &res); + rc = ahash_wait(crypto_ahash_init(req), &wait); if (rc) goto out; @@ -551,10 +529,10 @@ static int calc_buffer_ahash_atfm(const void *buf, loff_t len, ahash_rc = crypto_ahash_update(req); /* wait for the update request to complete */ - rc = ahash_wait(ahash_rc, &res); + rc = ahash_wait(ahash_rc, &wait); if (!rc) { ahash_request_set_crypt(req, NULL, hash->digest, 0); - rc = ahash_wait(crypto_ahash_final(req), &res); + rc = ahash_wait(crypto_ahash_final(req), &wait); } out: ahash_request_free(req);