From patchwork Thu Sep 5 15:45:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 11133431 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6AA5913B1 for ; Thu, 5 Sep 2019 15:46:24 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BA00E207E0 for ; Thu, 5 Sep 2019 15:46:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA00E207E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 2C1672027723C; Thu, 5 Sep 2019 08:47:21 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver=linux-nvdimm@lists.01.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 724E721959CB2 for ; Thu, 5 Sep 2019 08:47:20 -0700 (PDT) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x85FbaZt114237; Thu, 5 Sep 2019 11:46:22 -0400 Received: from ppma01wdc.us.ibm.com (fd.55.37a9.ip4.static.sl-reverse.com [169.55.85.253]) by mx0a-001b2d01.pphosted.com with ESMTP id 2uu3q0cmc4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 05 Sep 2019 11:46:22 -0400 Received: from pps.filterd (ppma01wdc.us.ibm.com [127.0.0.1]) by ppma01wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id x85Fjg8h014486; Thu, 5 Sep 2019 15:46:21 GMT Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by ppma01wdc.us.ibm.com with ESMTP id 2uqgh72jwr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 05 Sep 2019 15:46:21 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x85FkJUk58655054 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 5 Sep 2019 15:46:19 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6BD0A13604F; Thu, 5 Sep 2019 15:46:19 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 19BDB136055; Thu, 5 Sep 2019 15:46:18 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.35.243]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 5 Sep 2019 15:46:17 +0000 (GMT) From: "Aneesh Kumar K.V" To: dan.j.williams@intel.com Subject: [PATCH v9 2/7] libnvdimm/pmem: Advance namespace seed for specific probe errors Date: Thu, 5 Sep 2019 21:15:58 +0530 Message-Id: <20190905154603.10349-3-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190905154603.10349-1-aneesh.kumar@linux.ibm.com> References: <20190905154603.10349-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-05_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909050147 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Aneesh Kumar K.V" , linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" In order to support marking namespaces with unsupported feature/versions disabled, nvdimm core should advance the namespace seed on these probe failures. Otherwise, these failed namespaces will be considered a seed namespace and will be wrongly used while creating new namespaces. Add -EOPNOTSUPP as return from pmem probe callback to indicate a namespace initialization failures due to pfn superblock feature/version mismatch. Signed-off-by: Aneesh Kumar K.V --- drivers/nvdimm/bus.c | 3 ++- drivers/nvdimm/pmem.c | 29 +++++++++++++++++++++++++---- 2 files changed, 27 insertions(+), 5 deletions(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 9b64e68a20b8..dfe2fdb2db7d 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -95,7 +95,8 @@ static int nvdimm_bus_probe(struct device *dev) rc = nd_drv->probe(dev); debug_nvdimm_unlock(dev); - if (rc == 0 && dev->parent && is_nd_region(dev->parent)) + if ((rc == 0 || rc == -EOPNOTSUPP) && + dev->parent && is_nd_region(dev->parent)) nd_region_advance_seeds(to_nd_region(dev->parent), dev); nvdimm_bus_probe_end(nvdimm_bus); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4c121dd03dd9..f9f76f6ba07b 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -490,6 +490,7 @@ static int pmem_attach_disk(struct device *dev, static int nd_pmem_probe(struct device *dev) { + int ret; struct nd_namespace_common *ndns; ndns = nvdimm_namespace_common_probe(dev); @@ -505,12 +506,32 @@ static int nd_pmem_probe(struct device *dev) if (is_nd_pfn(dev)) return pmem_attach_disk(dev, ndns); - /* if we find a valid info-block we'll come back as that personality */ - if (nd_btt_probe(dev, ndns) == 0 || nd_pfn_probe(dev, ndns) == 0 - || nd_dax_probe(dev, ndns) == 0) + ret = nd_btt_probe(dev, ndns); + if (ret == 0) return -ENXIO; - /* ...otherwise we're just a raw pmem device */ + /* + * We have two failure conditions here, there is no + * info reserver block or we found a valid info reserve block + * but failed to initialize the pfn superblock. + * + * For the first case consider namespace as a raw pmem namespace + * and attach a disk. + * + * For the latter, consider this a success and advance the namespace + * seed. + */ + ret = nd_pfn_probe(dev, ndns); + if (ret == 0) + return -ENXIO; + else if (ret == -EOPNOTSUPP) + return ret; + + ret = nd_dax_probe(dev, ndns); + if (ret == 0) + return -ENXIO; + else if (ret == -EOPNOTSUPP) + return ret; return pmem_attach_disk(dev, ndns); }