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From: Dan Williams <dan.j.williams@intel.com>
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
Subject: [PATCH 05/23] libnvdimm/labels: Add blk isetcookie set / validation helpers
Date: Mon, 09 Aug 2021 15:28:14 -0700	[thread overview]
Message-ID: <162854809395.1980150.5182046005884745099.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <162854806653.1980150.3354618413963083778.stgit@dwillia2-desk3.amr.corp.intel.com>

In preparation for LIBNVDIMM to manage labels on CXL devices deploy
helpers that abstract the label type from the implementation. The CXL
label format is mostly similar to the EFI label format with concepts /
fields added, like dynamic region creation and label type guids, and
other concepts removed like BLK-mode and interleave-set-cookie ids.

Given BLK-mode is not even supported on CXL push hide the BLK-mode
specific details inside the helpers.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/label.c          |   30 ++++++++++++++++++++++++++++--
 drivers/nvdimm/namespace_devs.c |    9 ++-------
 drivers/nvdimm/nd.h             |    4 ++++
 3 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 3f73412dd438..d1a7f399cfe4 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -898,6 +898,33 @@ static struct resource *to_resource(struct nvdimm_drvdata *ndd,
 	return NULL;
 }
 
+static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd,
+				   struct nd_namespace_label *nd_label,
+				   u64 isetcookie)
+{
+	if (namespace_label_has(ndd, type_guid)) {
+		nsl_set_isetcookie(ndd, nd_label, isetcookie);
+		return;
+	}
+	nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */
+}
+
+bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
+				 struct nd_namespace_label *nd_label,
+				 u64 isetcookie)
+{
+	if (!namespace_label_has(ndd, type_guid))
+		return true;
+
+	if (nsl_get_isetcookie(ndd, nd_label) != isetcookie) {
+		dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", isetcookie,
+			nsl_get_isetcookie(ndd, nd_label));
+		return false;
+	}
+
+	return true;
+}
+
 /*
  * 1/ Account all the labels that can be freed after this update
  * 2/ Allocate and write the label to the staging (next) index
@@ -1042,12 +1069,11 @@ static int __blk_label_update(struct nd_region *nd_region,
 				nsl_set_nlabel(ndd, nd_label, 0xffff);
 				nsl_set_position(ndd, nd_label, 0xffff);
 			}
-			nsl_set_isetcookie(ndd, nd_label, nd_set->cookie2);
 		} else {
 			nsl_set_nlabel(ndd, nd_label, 0); /* N/A */
 			nsl_set_position(ndd, nd_label, 0); /* N/A */
-			nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */
 		}
+		nsl_set_blk_isetcookie(ndd, nd_label, nd_set->cookie2);
 
 		nsl_set_dpa(ndd, nd_label, res->start);
 		nsl_set_rawsize(ndd, nd_label, resource_size(res));
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index fb9e080ce654..fbd0c2fcea4a 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -2272,14 +2272,9 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
 					&nd_label->type_guid);
 			return ERR_PTR(-EAGAIN);
 		}
-
-		if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) {
-			dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n",
-					nd_set->cookie2,
-					nsl_get_isetcookie(ndd, nd_label));
-			return ERR_PTR(-EAGAIN);
-		}
 	}
+	if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2))
+		return ERR_PTR(-EAGAIN);
 
 	nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
 	if (!nsblk)
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 416846fe7818..2a9a608b7f17 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -176,6 +176,10 @@ static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
 	nd_label->lbasize = __cpu_to_le64(lbasize);
 }
 
+bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
+				 struct nd_namespace_label *nd_label,
+				 u64 isetcookie);
+
 struct nd_region_data {
 	int ns_count;
 	int ns_active;


  parent reply	other threads:[~2021-08-09 22:28 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09 22:27 [PATCH 00/23] cxl_test: Enable CXL Topology and UAPI regression tests Dan Williams
2021-08-09 22:27 ` [PATCH 01/23] libnvdimm/labels: Introduce getters for namespace label fields Dan Williams
2021-08-10 20:48   ` Ben Widawsky
2021-08-10 21:58     ` Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:27 ` [PATCH 02/23] libnvdimm/labels: Add isetcookie validation helper Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 03/23] libnvdimm/labels: Introduce label setter helpers Dan Williams
2021-08-11 17:27   ` Jonathan Cameron
2021-08-11 17:42     ` Dan Williams
2021-08-09 22:28 ` [PATCH 04/23] libnvdimm/labels: Add a checksum calculation helper Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:28 ` Dan Williams [this message]
2021-08-11 18:45   ` [PATCH 05/23] libnvdimm/labels: Add blk isetcookie set / validation helpers Jonathan Cameron
2021-08-09 22:28 ` [PATCH 06/23] libnvdimm/labels: Add blk special cases for nlabel and position helpers Dan Williams
2021-08-11 18:45   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 07/23] libnvdimm/labels: Add type-guid helpers Dan Williams
2021-08-11 18:46   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 08/23] libnvdimm/labels: Add claim class helpers Dan Williams
2021-08-11 18:46   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 09/23] libnvdimm/labels: Add address-abstraction uuid definitions Dan Williams
2021-08-11 18:49   ` Jonathan Cameron
2021-08-11 22:47     ` Dan Williams
2021-08-09 22:28 ` [PATCH 10/23] libnvdimm/labels: Add uuid helpers Dan Williams
2021-08-11  8:05   ` Andy Shevchenko
2021-08-11 16:59     ` Andy Shevchenko
2021-08-11 17:11       ` Dan Williams
2021-08-11 19:18         ` Andy Shevchenko
2021-08-11 19:26           ` Dan Williams
2021-08-12 22:34           ` Dan Williams
2021-08-13 10:14             ` Andy Shevchenko
2021-08-14  7:35               ` Christoph Hellwig
2021-08-11 18:13   ` Jonathan Cameron
2021-08-12 21:17     ` Dan Williams
2021-08-09 22:28 ` [PATCH 11/23] libnvdimm/labels: Introduce CXL labels Dan Williams
2021-08-11 18:41   ` Jonathan Cameron
2021-08-11 23:01     ` Dan Williams
2021-08-09 22:28 ` [PATCH 12/23] cxl/pci: Make 'struct cxl_mem' device type generic Dan Williams
2021-08-09 22:28 ` [PATCH 13/23] cxl/mbox: Introduce the mbox_send operation Dan Williams
2021-08-09 22:29 ` [PATCH 14/23] cxl/mbox: Move mailbox and other non-PCI specific infrastructure to the core Dan Williams
2021-08-11  6:11   ` [PATCH v2 " Dan Williams
2021-08-09 22:29 ` [PATCH 15/23] cxl/pci: Use module_pci_driver Dan Williams
2021-08-09 22:29 ` [PATCH 16/23] cxl/mbox: Convert 'enabled_cmds' to DECLARE_BITMAP Dan Williams
2021-08-09 22:29 ` [PATCH 17/23] cxl/mbox: Add exclusive kernel command support Dan Williams
2021-08-10 21:34   ` Ben Widawsky
2021-08-10 21:52     ` Dan Williams
2021-08-10 22:06       ` Ben Widawsky
2021-08-11  1:22         ` Dan Williams
2021-08-11  2:14           ` Dan Williams
2021-08-09 22:29 ` [PATCH 18/23] cxl/pmem: Translate NVDIMM label commands to CXL label commands Dan Williams
2021-08-09 22:29 ` [PATCH 19/23] cxl/pmem: Add support for multiple nvdimm-bridge objects Dan Williams
2021-08-09 22:29 ` [PATCH 20/23] tools/testing/cxl: Introduce a mocked-up CXL port hierarchy Dan Williams
2021-08-10 21:57   ` Ben Widawsky
2021-08-10 22:40     ` Dan Williams
2021-08-11 15:18       ` Ben Widawsky
     [not found]       ` <xp0k4.l2r85dw1p7do@intel.com>
2021-08-11 21:03         ` Dan Williams
2021-08-09 22:29 ` [PATCH 21/23] cxl/bus: Populate the target list at decoder create Dan Williams
2021-08-09 22:29 ` [PATCH 22/23] cxl/mbox: Move command definitions to common location Dan Williams
2021-08-09 22:29 ` [PATCH 23/23] tools/testing/cxl: Introduce a mock memory device + driver Dan Williams
2021-08-10 22:10 ` [PATCH 00/23] cxl_test: Enable CXL Topology and UAPI regression tests Ben Widawsky
2021-08-10 22:58   ` Dan Williams

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