From patchwork Mon Aug 9 22:27:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12427397 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81AFFC4338F for ; Mon, 9 Aug 2021 22:27:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62B0960E76 for ; Mon, 9 Aug 2021 22:27:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235376AbhHIW2T (ORCPT ); Mon, 9 Aug 2021 18:28:19 -0400 Received: from mga12.intel.com ([192.55.52.136]:23348 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233660AbhHIW2T (ORCPT ); Mon, 9 Aug 2021 18:28:19 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10070"; a="194386502" X-IronPort-AV: E=Sophos;i="5.84,308,1620716400"; d="scan'208";a="194386502" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Aug 2021 15:27:58 -0700 X-IronPort-AV: E=Sophos;i="5.84,308,1620716400"; d="scan'208";a="674429267" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Aug 2021 15:27:58 -0700 Subject: [PATCH 02/23] libnvdimm/labels: Add isetcookie validation helper From: Dan Williams To: linux-cxl@vger.kernel.org Cc: nvdimm@lists.linux.dev, Jonathan.Cameron@huawei.com, ben.widawsky@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, ira.weiny@intel.com Date: Mon, 09 Aug 2021 15:27:57 -0700 Message-ID: <162854807792.1980150.8842369662740914960.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <162854806653.1980150.3354618413963083778.stgit@dwillia2-desk3.amr.corp.intel.com> References: <162854806653.1980150.3354618413963083778.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-3-g996c MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org In preparation to handle CXL labels with the same code that handles EFI labels, add a specific interleave-set-cookie validation helper rather than a getter since the CXL label type does not support this concept. The answer for CXL labels will always be true. Signed-off-by: Dan Williams Reviewed-by: Jonathan Cameron --- drivers/nvdimm/namespace_devs.c | 8 +++----- drivers/nvdimm/nd.h | 7 +++++++ 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 94da804372bf..f33245c27cc4 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1847,15 +1847,13 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, list_for_each_entry(label_ent, &nd_mapping->labels, list) { struct nd_namespace_label *nd_label = label_ent->label; u16 position, nlabel; - u64 isetcookie; if (!nd_label) continue; - isetcookie = nsl_get_isetcookie(ndd, nd_label); position = nsl_get_position(ndd, nd_label); nlabel = nsl_get_nlabel(ndd, nd_label); - if (isetcookie != cookie) + if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) continue; if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) @@ -1968,10 +1966,10 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region, return ERR_PTR(-ENXIO); } - if (nsl_get_isetcookie(ndd, nd_label) != cookie) { + if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) { dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", nd_label->uuid); - if (nsl_get_isetcookie(ndd, nd_label) != altcookie) + if (!nsl_validate_isetcookie(ndd, nd_label, altcookie)) return ERR_PTR(-EAGAIN); dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 61f43f0edabf..b3feaf3699f7 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -83,6 +83,13 @@ static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd, return __le64_to_cpu(nd_label->isetcookie); } +static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *nd_label, + u64 cookie) +{ + return cookie == __le64_to_cpu(nd_label->isetcookie); +} + static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) {