From patchwork Thu Aug 30 15:00:16 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: 10581951 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 308E0174A for ; Thu, 30 Aug 2018 15:00:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 20B992C045 for ; Thu, 30 Aug 2018 15:00:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 150D52C052; Thu, 30 Aug 2018 15:00:59 +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 B070C2C045 for ; Thu, 30 Aug 2018 15:00:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729483AbeH3TD1 (ORCPT ); Thu, 30 Aug 2018 15:03:27 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:54128 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728449AbeH3TD1 (ORCPT ); Thu, 30 Aug 2018 15:03:27 -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 w7UExSSB144287; Thu, 30 Aug 2018 15:00:31 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=OKH6TA5Uqar48upSlXi2AXoDrM9YXuaf1IBH3NZA8r4=; b=VSdj1NJPvXfWl7NKudmNSjWT1sOkA8MlYHIl0/hTrJpHd907gcwwQ+n4xMs3Zyc5w/4h yMRHyM4uC9L1ZMAifFFwX/E5VHtAmb7gytmY/a2w7Iv/aYFzsTQ1A0sgfB7wGcGr0xyS a0Ch5geBe06v6ApsC+GVvBYESrixymlbHzmyaXwTBzxiac45VbjW7q3cxKMNIxO9nIh3 ZJJjgXiEDQPbhG5wQK0APEI5sXwndaaR3EBX9o6S1Nj/cqUS79r19S+DH2IqKzWKTEen +UmygIrEuiKA1VWG13b+EIo2S0H0b0htzWhGNwlRZf8BXSzLFQKXwQLIemRc1Nv+YJWx RA== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2m2xhu530h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Aug 2018 15:00:31 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w7UF0U0K003295 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Aug 2018 15:00:30 GMT Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w7UF0UNc009914; Thu, 30 Aug 2018 15:00:30 GMT Received: from ca-mkp.ca.oracle.com (/10.156.108.201) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 30 Aug 2018 08:00:29 -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 v2 3/3] crc-t10dif: Allow current transform to be inspected in sysfs Date: Thu, 30 Aug 2018 11:00:16 -0400 Message-Id: <20180830150016.15661-3-martin.petersen@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180830150016.15661-1-martin.petersen@oracle.com> References: <20180827060918.tfz7ljufqhlej4kq@gondor.apana.org.au> <20180830150016.15661-1-martin.petersen@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9000 signatures=668708 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-1808300155 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 52f577a3868d..6507fa101eff 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");