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From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: willy@linux.intel.com, ross.zwisler@linux.intel.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH 4/9] libnvdimm, pfn: add parent uuid validation
Date: Mon, 14 Dec 2015 18:14:49 -0800	[thread overview]
Message-ID: <20151215021449.37090.17888.stgit@dwillia2-desk3.jf.intel.com> (raw)
In-Reply-To: <20151215021428.37090.30720.stgit@dwillia2-desk3.jf.intel.com>

Track and check the uuid of the namespace hosting a pfn instance.  This
forces the pfn info block to be invalidated if the namespace is
re-configured with a different uuid.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/pfn_devs.c |   10 +++++++---
 drivers/nvdimm/pmem.c     |    1 +
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 95ecd7b0fab3..f9b674bc49db 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -273,10 +273,11 @@ struct device *nd_pfn_create(struct nd_region *nd_region)
 
 int nd_pfn_validate(struct nd_pfn *nd_pfn)
 {
-	struct nd_namespace_common *ndns = nd_pfn->ndns;
-	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
-	struct nd_namespace_io *nsio;
 	u64 checksum, offset;
+	struct nd_namespace_io *nsio;
+	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+	struct nd_namespace_common *ndns = nd_pfn->ndns;
+	const u8 *parent_uuid = nd_dev_to_uuid(&ndns->dev);
 
 	if (!pfn_sb || !ndns)
 		return -ENODEV;
@@ -296,6 +297,9 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
 		return -ENODEV;
 	pfn_sb->checksum = cpu_to_le64(checksum);
 
+	if (memcmp(pfn_sb->parent_uuid, parent_uuid, 16) != 0)
+		return -ENODEV;
+
 	switch (le32_to_cpu(pfn_sb->mode)) {
 	case PFN_MODE_RAM:
 		break;
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 5ba351e4f26a..dc6866734f70 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -270,6 +270,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	pfn_sb->npfns = cpu_to_le64(npfns);
 	memcpy(pfn_sb->signature, PFN_SIG, PFN_SIG_LEN);
 	memcpy(pfn_sb->uuid, nd_pfn->uuid, 16);
+	memcpy(pfn_sb->parent_uuid, nd_dev_to_uuid(&ndns->dev), 16);
 	pfn_sb->version_major = cpu_to_le16(1);
 	checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);
 	pfn_sb->checksum = cpu_to_le64(checksum);


WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@ml01.01.org
Cc: willy@linux.intel.com, ross.zwisler@linux.intel.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH 4/9] libnvdimm, pfn: add parent uuid validation
Date: Mon, 14 Dec 2015 18:14:49 -0800	[thread overview]
Message-ID: <20151215021449.37090.17888.stgit@dwillia2-desk3.jf.intel.com> (raw)
In-Reply-To: <20151215021428.37090.30720.stgit@dwillia2-desk3.jf.intel.com>

Track and check the uuid of the namespace hosting a pfn instance.  This
forces the pfn info block to be invalidated if the namespace is
re-configured with a different uuid.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/pfn_devs.c |   10 +++++++---
 drivers/nvdimm/pmem.c     |    1 +
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 95ecd7b0fab3..f9b674bc49db 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -273,10 +273,11 @@ struct device *nd_pfn_create(struct nd_region *nd_region)
 
 int nd_pfn_validate(struct nd_pfn *nd_pfn)
 {
-	struct nd_namespace_common *ndns = nd_pfn->ndns;
-	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
-	struct nd_namespace_io *nsio;
 	u64 checksum, offset;
+	struct nd_namespace_io *nsio;
+	struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+	struct nd_namespace_common *ndns = nd_pfn->ndns;
+	const u8 *parent_uuid = nd_dev_to_uuid(&ndns->dev);
 
 	if (!pfn_sb || !ndns)
 		return -ENODEV;
@@ -296,6 +297,9 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
 		return -ENODEV;
 	pfn_sb->checksum = cpu_to_le64(checksum);
 
+	if (memcmp(pfn_sb->parent_uuid, parent_uuid, 16) != 0)
+		return -ENODEV;
+
 	switch (le32_to_cpu(pfn_sb->mode)) {
 	case PFN_MODE_RAM:
 		break;
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 5ba351e4f26a..dc6866734f70 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -270,6 +270,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	pfn_sb->npfns = cpu_to_le64(npfns);
 	memcpy(pfn_sb->signature, PFN_SIG, PFN_SIG_LEN);
 	memcpy(pfn_sb->uuid, nd_pfn->uuid, 16);
+	memcpy(pfn_sb->parent_uuid, nd_dev_to_uuid(&ndns->dev), 16);
 	pfn_sb->version_major = cpu_to_le16(1);
 	checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);
 	pfn_sb->checksum = cpu_to_le64(checksum);


  parent reply	other threads:[~2015-12-15  2:14 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-15  2:14 [PATCH 0/9] libnvdimm, pfn updates for 4.5 Dan Williams
2015-12-15  2:14 ` Dan Williams
2015-12-15  2:14 ` [PATCH 1/9] libnvdimm, pfn: kill ND_PFN_ALIGN Dan Williams
2015-12-15  2:14   ` Dan Williams
2015-12-15  2:14 ` [PATCH 2/9] libnvdimm, pfn: clean up pfn create parameters Dan Williams
2015-12-15  2:14   ` Dan Williams
2015-12-15  2:14 ` [PATCH 3/9] libnvdimm, pfn: add 'align' attribute, default to HPAGE_SIZE Dan Williams
2015-12-15  2:14   ` Dan Williams
2015-12-15  2:14 ` Dan Williams [this message]
2015-12-15  2:14   ` [PATCH 4/9] libnvdimm, pfn: add parent uuid validation Dan Williams
2015-12-15  2:14 ` [PATCH 5/9] libnvdimm, pfn: fix pfn seed creation Dan Williams
2015-12-15  2:14   ` Dan Williams
2015-12-15  2:15 ` [PATCH 6/9] libnvdimm, pfn: enable pfn sysfs interface unit testing Dan Williams
2015-12-15  2:15   ` Dan Williams
2015-12-15  2:15 ` [PATCH 7/9] libnvdimm, pfn: fix nd_pfn_validate() return value handling Dan Williams
2015-12-15  2:15   ` Dan Williams
2015-12-15  2:15 ` [PATCH 8/9] tools/testing/libnvdimm: cleanup mock resource lookup Dan Williams
2015-12-15  2:15   ` Dan Williams
2015-12-15  7:11   ` Dan Williams
2015-12-15  7:11     ` Dan Williams
2015-12-15  2:15 ` [PATCH 9/9] libnvdimm, pfn: move 'memory mode' indication to sysfs Dan Williams
2015-12-15  2:15   ` Dan Williams

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