From patchwork Wed Jun 14 23:16:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9787623 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 F134960384 for ; Wed, 14 Jun 2017 23:23:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD7171FF21 for ; Wed, 14 Jun 2017 23:23:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C1D20284A8; Wed, 14 Jun 2017 23:23:22 +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=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 03CE91FF21 for ; Wed, 14 Jun 2017 23:23:21 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 4520621A16ECB; Wed, 14 Jun 2017 16:22:05 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 ACA0D21A18AAA for ; Wed, 14 Jun 2017 16:22:04 -0700 (PDT) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Jun 2017 16:23:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,341,1493708400"; d="scan'208";a="98089474" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by orsmga004.jf.intel.com with ESMTP; 14 Jun 2017 16:23:19 -0700 Subject: [PATCH v2 2/9] libnvdimm, label: add v1.2 interleave-set-cookie algorithm From: Dan Williams To: linux-nvdimm@lists.01.org Date: Wed, 14 Jun 2017 16:16:53 -0700 Message-ID: <149748212892.10258.10541304827185663576.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <149698494141.11651.11254238772643685302.stgit@dwillia2-desk3.amr.corp.intel.com> References: <149698494141.11651.11254238772643685302.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-acpi@vger.kernel.org, Nicholas Moulin , Kaushik Kanetkar Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP The interleave-set-cookie algorithm is extended to incorporate all the same components that are used to generate an nvdimm unique-id. For backwards compatibility we still maintain the old v1.1 definition. Reported-by: Nicholas Moulin Reported-by: Kaushik Kanetkar Signed-off-by: Dan Williams --- Changes since v1: * fixed acpi_nfit_init_interleave_set() to use the correct input ('info2' vs 'info') for generating the new cookie value drivers/acpi/nfit/core.c | 53 ++++++++++++++++++++++++++++++++++++++- drivers/nvdimm/label.c | 3 +- drivers/nvdimm/namespace_devs.c | 9 +++++-- drivers/nvdimm/nd.h | 3 +- drivers/nvdimm/region_devs.c | 43 ++++++++++++++++++++++++++++---- include/linux/libnvdimm.h | 5 +++- 6 files changed, 104 insertions(+), 12 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 097eff0b963d..e744ab38eaf9 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1663,12 +1663,29 @@ struct nfit_set_info { } mapping[0]; }; +struct nfit_set_info2 { + struct nfit_set_info_map2 { + u64 region_offset; + u32 serial_number; + u16 vendor_id; + u16 manufacturing_date; + u8 manufacturing_location; + u8 reserved[31]; + } mapping[0]; +}; + static size_t sizeof_nfit_set_info(int num_mappings) { return sizeof(struct nfit_set_info) + num_mappings * sizeof(struct nfit_set_info_map); } +static size_t sizeof_nfit_set_info2(int num_mappings) +{ + return sizeof(struct nfit_set_info2) + + num_mappings * sizeof(struct nfit_set_info_map2); +} + static int cmp_map_compat(const void *m0, const void *m1) { const struct nfit_set_info_map *map0 = m0; @@ -1690,6 +1707,18 @@ static int cmp_map(const void *m0, const void *m1) return 0; } +static int cmp_map2(const void *m0, const void *m1) +{ + const struct nfit_set_info_map2 *map0 = m0; + const struct nfit_set_info_map2 *map1 = m1; + + if (map0->region_offset < map1->region_offset) + return -1; + else if (map0->region_offset > map1->region_offset) + return 1; + return 0; +} + /* Retrieve the nth entry referencing this spa */ static struct acpi_nfit_memory_map *memdev_from_spa( struct acpi_nfit_desc *acpi_desc, u16 range_index, int n) @@ -1711,6 +1740,7 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc, struct device *dev = acpi_desc->dev; struct nd_interleave_set *nd_set; u16 nr = ndr_desc->num_mappings; + struct nfit_set_info2 *info2; struct nfit_set_info *info; if (spa_type == NFIT_SPA_PM || spa_type == NFIT_SPA_VOLATILE) @@ -1725,9 +1755,15 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc, info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL); if (!info) return -ENOMEM; + + info2 = devm_kzalloc(dev, sizeof_nfit_set_info2(nr), GFP_KERNEL); + if (!info2) + return -ENOMEM; + for (i = 0; i < nr; i++) { struct nd_mapping_desc *mapping = &ndr_desc->mapping[i]; struct nfit_set_info_map *map = &info->mapping[i]; + struct nfit_set_info_map2 *map2 = &info2->mapping[i]; struct nvdimm *nvdimm = mapping->nvdimm; struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc, @@ -1740,19 +1776,32 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc, map->region_offset = memdev->region_offset; map->serial_number = nfit_mem->dcr->serial_number; + + map2->region_offset = memdev->region_offset; + map2->serial_number = nfit_mem->dcr->serial_number; + map2->vendor_id = nfit_mem->dcr->vendor_id; + map2->manufacturing_date = nfit_mem->dcr->manufacturing_date; + map2->manufacturing_location = nfit_mem->dcr->manufacturing_location; } + /* v1.1 namespaces */ sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map), cmp_map, NULL); - nd_set->cookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0); + nd_set->cookie1 = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0); + + /* v1.2 namespaces */ + sort(&info2->mapping[0], nr, sizeof(struct nfit_set_info_map2), + cmp_map2, NULL); + nd_set->cookie2 = nd_fletcher64(info2, sizeof_nfit_set_info2(nr), 0); - /* support namespaces created with the wrong sort order */ + /* support v1.1 namespaces created with the wrong sort order */ sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map), cmp_map_compat, NULL); nd_set->altcookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0); ndr_desc->nd_set = nd_set; devm_kfree(dev, info); + devm_kfree(dev, info2); return 0; } diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index d6233d220bfd..1aacd4866c76 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -553,7 +553,6 @@ static int __pmem_label_update(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, int pos) { - u64 cookie = nd_region_interleave_set_cookie(nd_region); struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct nd_label_ent *label_ent, *victim = NULL; struct nd_namespace_label *nd_label; @@ -563,11 +562,13 @@ static int __pmem_label_update(struct nd_region *nd_region, unsigned long *free; u32 nslot, slot; size_t offset; + u64 cookie; int rc; if (!preamble_next(ndd, &nsindex, &free, &nslot)) return -ENXIO; + cookie = nd_region_interleave_set_cookie(nd_region, nsindex); nd_label_gen_id(&label_id, nspm->uuid, 0); for_each_dpa_resource(ndd, res) if (strcmp(res->name, label_id.id) == 0) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 2f9dfbd2dbec..51f304fe8a52 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1698,10 +1698,11 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) * @nd_label: target pmem namespace label to evaluate */ struct device *create_namespace_pmem(struct nd_region *nd_region, + struct nd_namespace_index *nsindex, struct nd_namespace_label *nd_label) { + u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); u64 altcookie = nd_region_interleave_set_altcookie(nd_region); - u64 cookie = nd_region_interleave_set_cookie(nd_region); struct nd_label_ent *label_ent; struct nd_namespace_pmem *nspm; struct nd_mapping *nd_mapping; @@ -2108,7 +2109,11 @@ static struct device **scan_labels(struct nd_region *nd_region) goto err; devs[count++] = dev; } else { - dev = create_namespace_pmem(nd_region, nd_label); + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + struct nd_namespace_index *nsindex; + + nsindex = to_namespace_index(ndd, ndd->ns_current); + dev = create_namespace_pmem(nd_region, nsindex, nd_label); if (IS_ERR(dev)) { switch (PTR_ERR(dev)) { case -EAGAIN: diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 28d9f4481547..ad4e518940c9 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -336,7 +336,8 @@ static inline struct device *nd_dax_create(struct nd_region *nd_region) struct nd_region *to_nd_region(struct device *dev); int nd_region_to_nstype(struct nd_region *nd_region); int nd_region_register_namespaces(struct nd_region *nd_region, int *err); -u64 nd_region_interleave_set_cookie(struct nd_region *nd_region); +u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, + struct nd_namespace_index *nsindex); u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region); void nvdimm_bus_lock(struct device *dev); void nvdimm_bus_unlock(struct device *dev); diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index b550edf2571f..282b8991ea83 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -307,13 +307,41 @@ static ssize_t set_cookie_show(struct device *dev, { struct nd_region *nd_region = to_nd_region(dev); struct nd_interleave_set *nd_set = nd_region->nd_set; + ssize_t rc = 0; if (is_nd_pmem(dev) && nd_set) /* pass, should be precluded by region_visible */; else return -ENXIO; - return sprintf(buf, "%#llx\n", nd_set->cookie); + /* + * The cookie to show depends on which specification of the + * labels we are using. If there are not labels then default to + * the v1.1 namespace label cookie definition. To read all this + * data we need to wait for probing to settle. + */ + device_lock(dev); + nvdimm_bus_lock(dev); + wait_nvdimm_bus_probe_idle(dev); + if (nd_region->ndr_mappings) { + struct nd_mapping *nd_mapping = &nd_region->mapping[0]; + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + + if (ndd) { + struct nd_namespace_index *nsindex; + + nsindex = to_namespace_index(ndd, ndd->ns_current); + rc = sprintf(buf, "%#llx\n", + nd_region_interleave_set_cookie(nd_region, + nsindex)); + } + } + nvdimm_bus_unlock(dev); + device_unlock(dev); + + if (rc) + return rc; + return sprintf(buf, "%#llx\n", nd_set->cookie1); } static DEVICE_ATTR_RO(set_cookie); @@ -564,13 +592,18 @@ struct attribute_group nd_region_attribute_group = { }; EXPORT_SYMBOL_GPL(nd_region_attribute_group); -u64 nd_region_interleave_set_cookie(struct nd_region *nd_region) +u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, + struct nd_namespace_index *nsindex) { struct nd_interleave_set *nd_set = nd_region->nd_set; - if (nd_set) - return nd_set->cookie; - return 0; + if (!nd_set) + return 0; + + if (nsindex && __le16_to_cpu(nsindex->major) == 1 + && __le16_to_cpu(nsindex->minor) == 1) + return nd_set->cookie1; + return nd_set->cookie2; } u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region) diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 6c807017128d..722cdf21429f 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -71,7 +71,10 @@ struct nd_cmd_desc { }; struct nd_interleave_set { - u64 cookie; + /* v1.1 definition of the interleave-set-cookie algorithm */ + u64 cookie1; + /* v1.2 definition of the interleave-set-cookie algorithm */ + u64 cookie2; /* compatibility with initial buggy Linux implementation */ u64 altcookie; };