From patchwork Sun Aug 26 02:40:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Martin K. Petersen" X-Patchwork-Id: 10576225 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B28F2109C for ; Sun, 26 Aug 2018 02:40:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A41F229CF9 for ; Sun, 26 Aug 2018 02:40:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 95B1229CFE; Sun, 26 Aug 2018 02:40:35 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY 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 29B9429CF9 for ; Sun, 26 Aug 2018 02:40:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726611AbeHZGVZ (ORCPT ); Sun, 26 Aug 2018 02:21:25 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:37394 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726317AbeHZGVZ (ORCPT ); Sun, 26 Aug 2018 02:21:25 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7Q2e84r002855; Sun, 26 Aug 2018 02:40:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=iR56RlvStaF7Ta0o5w14nFglBJ2ZGYnIIrO5kZN7HnI=; b=N4Y8/Gx0JAUn7Pu3QpwXxMFlOGoy/P4/HPkXIm/3+7pi5h8TiNHvASUxy8cxJpsGyuGX RDv60yl6+qpkpzU/tJARW4OarTIec3xF1Sex43KLE7JLtHlcIdOiZl1pogjb1uXV3+N7 363VNei8WsoYYbWThZyqIW6CiW55Tvh+OEHcrFsjPnUuT4/yOXSYH6RzvRtozhBo3mwV PaCCm+iphY6XobVz3xjq2oR8EgnpXTU8ppnP8UIJ+bnwzQc+xQcabtlm60dy2Phqz/3H 2akT43x0wrEzJEttRy2Unz4rhTfMvvOYsV6N59UOfRDCi52MpHFhauojXtxktRMhAG// xA== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2m2yrpsgw1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:08 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2e7Fl030700 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:07 GMT Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2e7k0012420; Sun, 26 Aug 2018 02:40:07 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 25 Aug 2018 19:40:07 -0700 From: "Martin K. Petersen" To: herbert@gondor.apana.org.au Cc: Jeff.Lien@wdc.com, ard.biesheuvel@linaro.org, david.darrington@wdc.com, hch@infradead.org, jeff.furlong@wdc.com, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com, tim.c.chen@linux.intel.com Subject: [PATCH 1/4] crypto: Introduce notifier for new crypto algorithms Date: Sat, 25 Aug 2018 22:40:03 -0400 Message-Id: <20180826024006.13800-1-martin.petersen@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180825061205.ygrjjazkooqghrqy@gondor.apana.org.au> References: <20180825061205.ygrjjazkooqghrqy@gondor.apana.org.au> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8996 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808260028 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce a facility that can be used to receive a notification callback when a new algorithm becomes available. This can be used by existing crypto registrations to trigger a switch from a software-only algorithm to a hardware-accelerated version. A new CRYPTO_MSG_ALG_LOADED state is introduced to the existing crypto notification chain, and the register/unregister functions are exported so they can be called by subsystems outside of crypto. Signed-off-by: Martin K. Petersen Suggested-by: Herbert Xu --- crypto/algapi.c | 7 +++---- crypto/algboss.c | 2 ++ crypto/internal.h | 8 -------- include/crypto/algapi.h | 10 ++++++++++ 4 files changed, 15 insertions(+), 12 deletions(-) diff --git a/crypto/algapi.c b/crypto/algapi.c index c0755cf4f53f..87abad3cc322 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -361,15 +361,12 @@ static void crypto_wait_for_test(struct crypto_larval *larval) err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult); if (err != NOTIFY_STOP) { if (WARN_ON(err != NOTIFY_DONE)) - goto out; + return; crypto_alg_tested(larval->alg.cra_driver_name, 0); } err = wait_for_completion_killable(&larval->completion); WARN_ON(err); - -out: - crypto_larval_kill(&larval->alg); } int crypto_register_alg(struct crypto_alg *alg) @@ -390,6 +387,8 @@ int crypto_register_alg(struct crypto_alg *alg) return PTR_ERR(larval); crypto_wait_for_test(larval); + crypto_probing_notify(CRYPTO_MSG_ALG_LOADED, larval); + crypto_larval_kill(&larval->alg); return 0; } EXPORT_SYMBOL_GPL(crypto_register_alg); diff --git a/crypto/algboss.c b/crypto/algboss.c index 5e6df2a087fa..527b44d0af21 100644 --- a/crypto/algboss.c +++ b/crypto/algboss.c @@ -274,6 +274,8 @@ static int cryptomgr_notify(struct notifier_block *this, unsigned long msg, return cryptomgr_schedule_probe(data); case CRYPTO_MSG_ALG_REGISTER: return cryptomgr_schedule_test(data); + case CRYPTO_MSG_ALG_LOADED: + break; } return NOTIFY_DONE; diff --git a/crypto/internal.h b/crypto/internal.h index 9a3f39939fba..ef769b5e8ad3 100644 --- a/crypto/internal.h +++ b/crypto/internal.h @@ -26,12 +26,6 @@ #include #include -/* Crypto notification events. */ -enum { - CRYPTO_MSG_ALG_REQUEST, - CRYPTO_MSG_ALG_REGISTER, -}; - struct crypto_instance; struct crypto_template; @@ -90,8 +84,6 @@ struct crypto_alg *crypto_find_alg(const char *alg_name, void *crypto_alloc_tfm(const char *alg_name, const struct crypto_type *frontend, u32 type, u32 mask); -int crypto_register_notifier(struct notifier_block *nb); -int crypto_unregister_notifier(struct notifier_block *nb); int crypto_probing_notify(unsigned long val, void *v); unsigned int crypto_alg_extsize(struct crypto_alg *alg); diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index bd5e8ccf1687..807501a4a754 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -425,4 +425,14 @@ static inline void crypto_yield(u32 flags) #endif } +int crypto_register_notifier(struct notifier_block *nb); +int crypto_unregister_notifier(struct notifier_block *nb); + +/* Crypto notification events. */ +enum { + CRYPTO_MSG_ALG_REQUEST, + CRYPTO_MSG_ALG_REGISTER, + CRYPTO_MSG_ALG_LOADED, +}; + #endif /* _CRYPTO_ALGAPI_H */ From patchwork Sun Aug 26 02:40:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Martin K. Petersen" X-Patchwork-Id: 10576229 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 268E9109C for ; Sun, 26 Aug 2018 02:40:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1542429CFA for ; Sun, 26 Aug 2018 02:40:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 06AD629D09; Sun, 26 Aug 2018 02:40:59 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY 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 119C229CFA for ; Sun, 26 Aug 2018 02:40:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726886AbeHZGVt (ORCPT ); Sun, 26 Aug 2018 02:21:49 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:37578 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726611AbeHZGVs (ORCPT ); Sun, 26 Aug 2018 02:21:48 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7Q2d2TP002315; Sun, 26 Aug 2018 02:40:32 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=mime-version : message-id : date : from : to : cc : subject : references : in-reply-to : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=ow6fnJM0VuZZQfNfoIOmoYSRxhdHbmkXfeDMmf91aeo=; b=nfbQA1C87UG9p9VNDpbhfxgIvE5fdIr979WW//TfwHMYxm57oLIfG7I/1BgGq4AWCqgV AMSlx7DS0ojy7Li3ZKw3expC7K48IAOu4ckrDix7pkZU6Hck+x3Zs0KFXJ3P1zicyP+4 AYblnn7epefQoyS1oBZQHqA2XdQMeiYgRd8S+Qmv4zmxenyxHCwBeOnlIRDFNaWucQ3q gVUusqzqMtMCb3yRFO33NCrNIwGwbOnwSldLXSRhIj84CK2aT42l7lDCs1vkKSrqmk51 qDfCfXwUb5ZzERG8eiDncxqkYhJoChPqWOWUxEXZb7887DKZpTh5eql2nkJLusd2ypM0 hw== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2m2yrpsgw8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:32 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2eVe8031028 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:31 GMT Received: from abhmp0015.oracle.com (abhmp0015.oracle.com [141.146.116.21]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w7Q2eT9Q015753; Sun, 26 Aug 2018 02:40:30 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 25 Aug 2018 19:40:08 -0700 MIME-Version: 1.0 Message-ID: <20180826024006.13800-2-martin.petersen@oracle.com> Date: Sat, 25 Aug 2018 19:40:04 -0700 (PDT) From: "Martin K. Petersen" To: herbert@gondor.apana.org.au Cc: Jeff.Lien@wdc.com, ard.biesheuvel@linaro.org, david.darrington@wdc.com, hch@infradead.org, jeff.furlong@wdc.com, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com, tim.c.chen@linux.intel.com Subject: [PATCH 2/4] crc-t10dif: Pick better transform if one becomes available References: <20180825061205.ygrjjazkooqghrqy@gondor.apana.org.au> <20180826024006.13800-1-martin.petersen@oracle.com> In-Reply-To: <20180826024006.13800-1-martin.petersen@oracle.com> X-Mailer: git-send-email 2.17.1 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8996 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=3 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808260028 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP T10 CRC library is linked into the kernel thanks to block and SCSI. The crypto accelerators are typically loaded later as modules and are therefore not available when the T10 CRC library is initialized. Use the crypto notifier facility to trigger a switch to a better algorithm if one becomes available after the initial hash has been registered. Use RCU to protect the original transform while the new one is being set up. Suggested-by: Ard Biesheuvel Signed-off-by: Martin K. Petersen --- include/linux/crc-t10dif.h | 1 + lib/crc-t10dif.c | 46 ++++++++++++++++++++++++++++++++++++-- 2 files changed, 45 insertions(+), 2 deletions(-) diff --git a/include/linux/crc-t10dif.h b/include/linux/crc-t10dif.h index 1fe0cfcdea30..6bb0c0bf357b 100644 --- a/include/linux/crc-t10dif.h +++ b/include/linux/crc-t10dif.h @@ -6,6 +6,7 @@ #define CRC_T10DIF_DIGEST_SIZE 2 #define CRC_T10DIF_BLOCK_SIZE 1 +#define CRC_T10DIF_STRING "crct10dif" extern __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len); diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c index 1ad33e555805..72076a902df5 100644 --- a/lib/crc-t10dif.c +++ b/lib/crc-t10dif.c @@ -14,10 +14,47 @@ #include #include #include +#include #include +#include -static struct crypto_shash *crct10dif_tfm; +static struct crypto_shash __rcu *crct10dif_tfm; static struct static_key crct10dif_fallback __read_mostly; +DEFINE_SPINLOCK(crc_t10dif_mutex); + +static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data) +{ + struct crypto_alg *alg = data; + struct crypto_shash *new, *old; + + if (val != CRYPTO_MSG_ALG_LOADED || + static_key_false(&crct10dif_fallback) || + strncmp(alg->cra_name, CRC_T10DIF_STRING, strlen(CRC_T10DIF_STRING))) + return 0; + + spin_lock(&crc_t10dif_mutex); + old = rcu_dereference_protected(crct10dif_tfm, + lockdep_is_held(&crc_t10dif_mutex)); + if (!old) { + spin_unlock(&crc_t10dif_mutex); + return 0; + } + new = crypto_alloc_shash("crct10dif", 0, 0); + if (IS_ERR(new)) { + spin_unlock(&crc_t10dif_mutex); + return 0; + } + rcu_assign_pointer(crct10dif_tfm, new); + spin_unlock(&crc_t10dif_mutex); + + synchronize_rcu(); + crypto_free_shash(old); + return 0; +} + +static struct notifier_block crc_t10dif_nb = { + .notifier_call = crc_t10dif_rehash, +}; __u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len) { @@ -30,11 +67,14 @@ __u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len) if (static_key_false(&crct10dif_fallback)) return crc_t10dif_generic(crc, buffer, len); - desc.shash.tfm = crct10dif_tfm; + rcu_read_lock(); + desc.shash.tfm = rcu_dereference(crct10dif_tfm); desc.shash.flags = 0; *(__u16 *)desc.ctx = crc; err = crypto_shash_update(&desc.shash, buffer, len); + rcu_read_unlock(); + BUG_ON(err); return *(__u16 *)desc.ctx; @@ -49,6 +89,7 @@ EXPORT_SYMBOL(crc_t10dif); static int __init crc_t10dif_mod_init(void) { + crypto_register_notifier(&crc_t10dif_nb); crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); if (IS_ERR(crct10dif_tfm)) { static_key_slow_inc(&crct10dif_fallback); @@ -59,6 +100,7 @@ static int __init crc_t10dif_mod_init(void) static void __exit crc_t10dif_mod_fini(void) { + crypto_unregister_notifier(&crc_t10dif_nb); crypto_free_shash(crct10dif_tfm); } From patchwork Sun Aug 26 02:40:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Martin K. Petersen" X-Patchwork-Id: 10576243 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 09B1C174C for ; Sun, 26 Aug 2018 02:41:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F23E829CFA for ; Sun, 26 Aug 2018 02:41:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E601029D09; Sun, 26 Aug 2018 02:41:44 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY 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 A086929CFA for ; Sun, 26 Aug 2018 02:41:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726869AbeHZGW2 (ORCPT ); Sun, 26 Aug 2018 02:22:28 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:42432 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726503AbeHZGW2 (ORCPT ); Sun, 26 Aug 2018 02:22:28 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7Q2cVhb018143; Sun, 26 Aug 2018 02:40:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=2e13kRzdgf6jvIJ2TgDjQEI+9y8ibJYSbmj/+EiFKtI=; b=KlPRHeBypunY3smQ4K7kdnlGUPMpJL36Hc/TAT91hzMyW9grIaPTSYfd+FpaHuqhq7S0 WjqyikDCS8pcLcWkiDgvihYExx1lFJM5OHOD0BrEJKapFqWuPoPPdyOKd8ATtQxzT8z/ dWLlh/us8dqXspfvfBJUHn6VRoTYPQljookyUcwcTBnOQcgFlFLV1YTq8cOVFI8ot9pi YtvlmK3gcOirBzNpRsB+42g0A513v29CXk+sq70zWV6knCJSXfMi9LPDlkdOsm4uVmru wwfranDBPLl+ZLzCHsBU3kkdzQbwmb70l1I44Qg1XqJpU+yuLs+fJmzqHG3GiDdWGRrM 0w== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by userp2130.oracle.com with ESMTP id 2m2xht9mak-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:11 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2eArH031921 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:10 GMT Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2eAos012424; Sun, 26 Aug 2018 02:40:10 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 25 Aug 2018 19:40:10 -0700 From: "Martin K. Petersen" To: herbert@gondor.apana.org.au Cc: Jeff.Lien@wdc.com, ard.biesheuvel@linaro.org, david.darrington@wdc.com, hch@infradead.org, jeff.furlong@wdc.com, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com, tim.c.chen@linux.intel.com Subject: [PATCH 3/4] crc-t10dif: Allow current transform to be inspected in sysfs Date: Sat, 25 Aug 2018 22:40:05 -0400 Message-Id: <20180826024006.13800-3-martin.petersen@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180826024006.13800-1-martin.petersen@oracle.com> References: <20180825061205.ygrjjazkooqghrqy@gondor.apana.org.au> <20180826024006.13800-1-martin.petersen@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8996 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808260028 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a way to print the currently active CRC algorithm in: /sys/module/crc_t10dif/parameters/transform Signed-off-by: Martin K. Petersen --- lib/crc-t10dif.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c index 72076a902df5..21c9b35a656f 100644 --- a/lib/crc-t10dif.c +++ b/lib/crc-t10dif.c @@ -107,6 +107,17 @@ static void __exit crc_t10dif_mod_fini(void) module_init(crc_t10dif_mod_init); module_exit(crc_t10dif_mod_fini); +static int crc_t10dif_transform_show(char *buffer, const struct kernel_param *kp) +{ + if (static_key_false(&crct10dif_fallback)) + return sprintf(buffer, "fallback\n"); + + return sprintf(buffer, "%s\n", + crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm))); +} + +module_param_call(transform, NULL, crc_t10dif_transform_show, NULL, 0644); + MODULE_DESCRIPTION("T10 DIF CRC calculation"); MODULE_LICENSE("GPL"); MODULE_SOFTDEP("pre: crct10dif"); From patchwork Sun Aug 26 02:40:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Martin K. Petersen" X-Patchwork-Id: 10576237 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 10D98109C for ; Sun, 26 Aug 2018 02:41:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04D6E29CFA for ; Sun, 26 Aug 2018 02:41:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EAA6A29D00; Sun, 26 Aug 2018 02:41:38 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY 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 7BAD029CFA for ; Sun, 26 Aug 2018 02:41:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727020AbeHZGW3 (ORCPT ); Sun, 26 Aug 2018 02:22:29 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:42434 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726427AbeHZGW3 (ORCPT ); Sun, 26 Aug 2018 02:22:29 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7Q2ci0W018166; Sun, 26 Aug 2018 02:40:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=rzPKFXQX+fuQlPeaU75vzZtEQSZNaJqX0TtSlt5GhyI=; b=CEFttIcYP9+ICeIcCo0vLer1Abuvap8p18ylyS9P2hnliYm57+mOpp1XaJDifci/tQMN 3oD3rdTrcRRyu2JAu4VUoIAbUAEvmYx1kBQqpPKtCINiJyjW7TBP/t/0+gwO19oNPRt3 Y8k8ugzZVNk4KW3jEdlBIYfXLhRd+TsuUxmfxjZSXxxTg2D1GMEvg4Ju47t/if0M+Dhx 0k2MbBtAqELk+Va+hR/zQkz8jkMJWe8CnrpGnjxT8RnM4cVwedxzqwdQ0wO5XZDUeG5l iHs47NP36tUzSmDFHQ9c7pY56cqFVLNtWE4nNvO2DF+7iNhUb4NoRGEmeenT1PFY0Wzr 4A== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp2130.oracle.com with ESMTP id 2m2xht9mam-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:13 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2eCaN012162 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Aug 2018 02:40:12 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7Q2eBhM028423; Sun, 26 Aug 2018 02:40:11 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 25 Aug 2018 19:40:11 -0700 From: "Martin K. Petersen" To: herbert@gondor.apana.org.au Cc: Jeff.Lien@wdc.com, ard.biesheuvel@linaro.org, david.darrington@wdc.com, hch@infradead.org, jeff.furlong@wdc.com, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com, tim.c.chen@linux.intel.com Subject: [PATCH 4/4] block: Integrity profile init function to trigger module loads Date: Sat, 25 Aug 2018 22:40:06 -0400 Message-Id: <20180826024006.13800-4-martin.petersen@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180826024006.13800-1-martin.petersen@oracle.com> References: <20180825061205.ygrjjazkooqghrqy@gondor.apana.org.au> <20180826024006.13800-1-martin.petersen@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8996 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808260028 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The T10 CRC library function is built into the kernel and therefore registered early. The hardware-accelerated CRC helpers are typically loaded as modules and only become available later in the boot sequence. A separate patch modifies the T10 CRC library to subscribe to notifications from crypto and permits switching from the table-based algorithm to a hardware accelerated ditto once the relevant module is loaded. However, since the dependency for "crc10dif" is already satisfied, nothing is going to cause the hardware-accelerated kernel modules to get loaded. Introduce an init_fn in the integrity profile that can be called to trigger a load of modules providing the T10 CRC calculation capability. This function will ony get called when a new integrity profile is registered during device discovery. Signed-off-by: Martin K. Petersen --- block/blk-integrity.c | 5 +++++ block/t10-pi.c | 10 ++++++++++ include/linux/blkdev.h | 2 ++ 3 files changed, 17 insertions(+) diff --git a/block/blk-integrity.c b/block/blk-integrity.c index 6121611e1316..5cacae9a2dc2 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "blk.h" @@ -391,6 +392,7 @@ static blk_status_t blk_integrity_nop_fn(struct blk_integrity_iter *iter) static const struct blk_integrity_profile nop_profile = { .name = "nop", + .init_fn = NULL, .generate_fn = blk_integrity_nop_fn, .verify_fn = blk_integrity_nop_fn, }; @@ -418,6 +420,9 @@ void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template bi->tuple_size = template->tuple_size; bi->tag_size = template->tag_size; + if (bi->profile->init_fn) + bi->profile->init_fn(); + disk->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; } EXPORT_SYMBOL(blk_integrity_register); diff --git a/block/t10-pi.c b/block/t10-pi.c index a98db384048f..b83278f9163a 100644 --- a/block/t10-pi.c +++ b/block/t10-pi.c @@ -24,6 +24,7 @@ #include #include #include +#include #include typedef __be16 (csum_fn) (void *, unsigned int); @@ -157,8 +158,14 @@ static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter) return t10_pi_verify(iter, t10_pi_ip_fn, 3); } +static void t10_pi_crc_init(void) +{ + request_module_nowait(CRC_T10DIF_STRING); +} + const struct blk_integrity_profile t10_pi_type1_crc = { .name = "T10-DIF-TYPE1-CRC", + .init_fn = t10_pi_crc_init, .generate_fn = t10_pi_type1_generate_crc, .verify_fn = t10_pi_type1_verify_crc, }; @@ -166,6 +173,7 @@ EXPORT_SYMBOL(t10_pi_type1_crc); const struct blk_integrity_profile t10_pi_type1_ip = { .name = "T10-DIF-TYPE1-IP", + .init_fn = NULL, .generate_fn = t10_pi_type1_generate_ip, .verify_fn = t10_pi_type1_verify_ip, }; @@ -173,6 +181,7 @@ EXPORT_SYMBOL(t10_pi_type1_ip); const struct blk_integrity_profile t10_pi_type3_crc = { .name = "T10-DIF-TYPE3-CRC", + .init_fn = t10_pi_crc_init, .generate_fn = t10_pi_type3_generate_crc, .verify_fn = t10_pi_type3_verify_crc, }; @@ -180,6 +189,7 @@ EXPORT_SYMBOL(t10_pi_type3_crc); const struct blk_integrity_profile t10_pi_type3_ip = { .name = "T10-DIF-TYPE3-IP", + .init_fn = NULL, .generate_fn = t10_pi_type3_generate_ip, .verify_fn = t10_pi_type3_verify_ip, }; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 79226ca8f80f..a43c02e4f43d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1806,10 +1806,12 @@ struct blk_integrity_iter { }; typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *); +typedef void (integrity_init_fn) (void); struct blk_integrity_profile { integrity_processing_fn *generate_fn; integrity_processing_fn *verify_fn; + integrity_init_fn *init_fn; const char *name; };