All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	linux-nvdimm@lists.01.org
Subject: [PATCH v5 2/4] mm/nvdimm: Add page size and struct page size to pfn superblock
Date: Fri,  9 Aug 2019 13:15:18 +0530	[thread overview]
Message-ID: <20190809074520.27115-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20190809074520.27115-1-aneesh.kumar@linux.ibm.com>

This is needed so that we don't wrongly initialize a namespace
which doesn't have enough space reserved for holding struct pages
with the current kernel.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/pfn.h      |  5 ++++-
 drivers/nvdimm/pfn_devs.c | 27 ++++++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h
index 7381673b7b70..acb19517f678 100644
--- a/drivers/nvdimm/pfn.h
+++ b/drivers/nvdimm/pfn.h
@@ -29,7 +29,10 @@ struct nd_pfn_sb {
 	/* minor-version-2 record the base alignment of the mapping */
 	__le32 align;
 	/* minor-version-3 guarantee the padding and flags are zero */
-	u8 padding[4000];
+	/* minor-version-4 record the page size and struct page size */
+	__le32 page_size;
+	__le16 page_struct_size;
+	u8 padding[3994];
 	__le64 checksum;
 };
 
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 3e7b11cf1aae..37e96811c2fc 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -460,6 +460,15 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	if (__le16_to_cpu(pfn_sb->version_minor) < 2)
 		pfn_sb->align = 0;
 
+	if (__le16_to_cpu(pfn_sb->version_minor) < 4) {
+		/*
+		 * For a large part we use PAGE_SIZE. But we
+		 * do have some accounting code using SZ_4K.
+		 */
+		pfn_sb->page_struct_size = cpu_to_le16(64);
+		pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
+	}
+
 	switch (le32_to_cpu(pfn_sb->mode)) {
 	case PFN_MODE_RAM:
 	case PFN_MODE_PMEM:
@@ -475,6 +484,20 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 		align = 1UL << ilog2(offset);
 	mode = le32_to_cpu(pfn_sb->mode);
 
+	if (le32_to_cpu(pfn_sb->page_size) != PAGE_SIZE) {
+		dev_err(&nd_pfn->dev,
+			"init failed, page size mismatch %d\n",
+			le32_to_cpu(pfn_sb->page_size));
+		return -EOPNOTSUPP;
+	}
+
+	if (le16_to_cpu(pfn_sb->page_struct_size) < sizeof(struct page)) {
+		dev_err(&nd_pfn->dev,
+			"init failed, struct page size mismatch %d\n",
+			le16_to_cpu(pfn_sb->page_struct_size));
+		return -EOPNOTSUPP;
+	}
+
 	if (!nd_pfn->uuid) {
 		/*
 		 * When probing a namepace via nd_pfn_probe() the uuid
@@ -722,8 +745,10 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	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);
-	pfn_sb->version_minor = cpu_to_le16(3);
+	pfn_sb->version_minor = cpu_to_le16(4);
 	pfn_sb->align = cpu_to_le32(nd_pfn->align);
+	pfn_sb->page_struct_size = cpu_to_le16(sizeof(struct page));
+	pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
 	checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);
 	pfn_sb->checksum = cpu_to_le64(checksum);
 
-- 
2.21.0

_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm

WARNING: multiple messages have this Message-ID (diff)
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	linux-nvdimm@lists.01.org
Subject: [PATCH v5 2/4] mm/nvdimm: Add page size and struct page size to pfn superblock
Date: Fri,  9 Aug 2019 13:15:18 +0530	[thread overview]
Message-ID: <20190809074520.27115-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20190809074520.27115-1-aneesh.kumar@linux.ibm.com>

This is needed so that we don't wrongly initialize a namespace
which doesn't have enough space reserved for holding struct pages
with the current kernel.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/pfn.h      |  5 ++++-
 drivers/nvdimm/pfn_devs.c | 27 ++++++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h
index 7381673b7b70..acb19517f678 100644
--- a/drivers/nvdimm/pfn.h
+++ b/drivers/nvdimm/pfn.h
@@ -29,7 +29,10 @@ struct nd_pfn_sb {
 	/* minor-version-2 record the base alignment of the mapping */
 	__le32 align;
 	/* minor-version-3 guarantee the padding and flags are zero */
-	u8 padding[4000];
+	/* minor-version-4 record the page size and struct page size */
+	__le32 page_size;
+	__le16 page_struct_size;
+	u8 padding[3994];
 	__le64 checksum;
 };
 
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 3e7b11cf1aae..37e96811c2fc 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -460,6 +460,15 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	if (__le16_to_cpu(pfn_sb->version_minor) < 2)
 		pfn_sb->align = 0;
 
+	if (__le16_to_cpu(pfn_sb->version_minor) < 4) {
+		/*
+		 * For a large part we use PAGE_SIZE. But we
+		 * do have some accounting code using SZ_4K.
+		 */
+		pfn_sb->page_struct_size = cpu_to_le16(64);
+		pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
+	}
+
 	switch (le32_to_cpu(pfn_sb->mode)) {
 	case PFN_MODE_RAM:
 	case PFN_MODE_PMEM:
@@ -475,6 +484,20 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 		align = 1UL << ilog2(offset);
 	mode = le32_to_cpu(pfn_sb->mode);
 
+	if (le32_to_cpu(pfn_sb->page_size) != PAGE_SIZE) {
+		dev_err(&nd_pfn->dev,
+			"init failed, page size mismatch %d\n",
+			le32_to_cpu(pfn_sb->page_size));
+		return -EOPNOTSUPP;
+	}
+
+	if (le16_to_cpu(pfn_sb->page_struct_size) < sizeof(struct page)) {
+		dev_err(&nd_pfn->dev,
+			"init failed, struct page size mismatch %d\n",
+			le16_to_cpu(pfn_sb->page_struct_size));
+		return -EOPNOTSUPP;
+	}
+
 	if (!nd_pfn->uuid) {
 		/*
 		 * When probing a namepace via nd_pfn_probe() the uuid
@@ -722,8 +745,10 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	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);
-	pfn_sb->version_minor = cpu_to_le16(3);
+	pfn_sb->version_minor = cpu_to_le16(4);
 	pfn_sb->align = cpu_to_le32(nd_pfn->align);
+	pfn_sb->page_struct_size = cpu_to_le16(sizeof(struct page));
+	pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
 	checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);
 	pfn_sb->checksum = cpu_to_le64(checksum);
 
-- 
2.21.0


WARNING: multiple messages have this Message-ID (diff)
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-nvdimm@lists.01.org, linux-mm@kvack.org,
	linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v5 2/4] mm/nvdimm: Add page size and struct page size to pfn superblock
Date: Fri,  9 Aug 2019 13:15:18 +0530	[thread overview]
Message-ID: <20190809074520.27115-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20190809074520.27115-1-aneesh.kumar@linux.ibm.com>

This is needed so that we don't wrongly initialize a namespace
which doesn't have enough space reserved for holding struct pages
with the current kernel.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/pfn.h      |  5 ++++-
 drivers/nvdimm/pfn_devs.c | 27 ++++++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h
index 7381673b7b70..acb19517f678 100644
--- a/drivers/nvdimm/pfn.h
+++ b/drivers/nvdimm/pfn.h
@@ -29,7 +29,10 @@ struct nd_pfn_sb {
 	/* minor-version-2 record the base alignment of the mapping */
 	__le32 align;
 	/* minor-version-3 guarantee the padding and flags are zero */
-	u8 padding[4000];
+	/* minor-version-4 record the page size and struct page size */
+	__le32 page_size;
+	__le16 page_struct_size;
+	u8 padding[3994];
 	__le64 checksum;
 };
 
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 3e7b11cf1aae..37e96811c2fc 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -460,6 +460,15 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 	if (__le16_to_cpu(pfn_sb->version_minor) < 2)
 		pfn_sb->align = 0;
 
+	if (__le16_to_cpu(pfn_sb->version_minor) < 4) {
+		/*
+		 * For a large part we use PAGE_SIZE. But we
+		 * do have some accounting code using SZ_4K.
+		 */
+		pfn_sb->page_struct_size = cpu_to_le16(64);
+		pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
+	}
+
 	switch (le32_to_cpu(pfn_sb->mode)) {
 	case PFN_MODE_RAM:
 	case PFN_MODE_PMEM:
@@ -475,6 +484,20 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
 		align = 1UL << ilog2(offset);
 	mode = le32_to_cpu(pfn_sb->mode);
 
+	if (le32_to_cpu(pfn_sb->page_size) != PAGE_SIZE) {
+		dev_err(&nd_pfn->dev,
+			"init failed, page size mismatch %d\n",
+			le32_to_cpu(pfn_sb->page_size));
+		return -EOPNOTSUPP;
+	}
+
+	if (le16_to_cpu(pfn_sb->page_struct_size) < sizeof(struct page)) {
+		dev_err(&nd_pfn->dev,
+			"init failed, struct page size mismatch %d\n",
+			le16_to_cpu(pfn_sb->page_struct_size));
+		return -EOPNOTSUPP;
+	}
+
 	if (!nd_pfn->uuid) {
 		/*
 		 * When probing a namepace via nd_pfn_probe() the uuid
@@ -722,8 +745,10 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 	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);
-	pfn_sb->version_minor = cpu_to_le16(3);
+	pfn_sb->version_minor = cpu_to_le16(4);
 	pfn_sb->align = cpu_to_le32(nd_pfn->align);
+	pfn_sb->page_struct_size = cpu_to_le16(sizeof(struct page));
+	pfn_sb->page_size = cpu_to_le32(PAGE_SIZE);
 	checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);
 	pfn_sb->checksum = cpu_to_le64(checksum);
 
-- 
2.21.0


  parent reply	other threads:[~2019-08-09  7:48 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09  7:45 [PATCH v5 0/4] Mark the namespace disabled on pfn superblock mismatch Aneesh Kumar K.V
2019-08-09  7:45 ` Aneesh Kumar K.V
2019-08-09  7:45 ` Aneesh Kumar K.V
2019-08-09  7:45 ` [PATCH v5 1/4] nvdimm: Consider probe return -EOPNOTSUPP as success Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-14  4:22   ` Dan Williams
2019-08-14  4:22     ` Dan Williams
2019-08-14  4:22     ` Dan Williams
2019-08-15 19:54     ` Dan Williams
2019-08-15 19:54       ` Dan Williams
2019-08-15 19:54       ` Dan Williams
2019-08-19  7:05       ` Aneesh Kumar K.V
2019-08-19  7:05         ` Aneesh Kumar K.V
2019-08-19  7:05         ` Aneesh Kumar K.V
2019-08-19 16:57         ` Dan Williams
2019-08-19 16:57           ` Dan Williams
2019-08-19 16:57           ` Dan Williams
2019-08-09  7:45 ` Aneesh Kumar K.V [this message]
2019-08-09  7:45   ` [PATCH v5 2/4] mm/nvdimm: Add page size and struct page size to pfn superblock Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-10  4:21   ` Aneesh Kumar K.V
2019-08-14 21:06     ` Dan Williams
2019-08-09  7:45 ` [PATCH v5 3/4] mm/nvdimm: Use correct #defines instead of open coding Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-15 21:05   ` Dan Williams
2019-08-15 21:05     ` Dan Williams
2019-08-19  7:11     ` Aneesh Kumar K.V
2019-08-19  7:11       ` Aneesh Kumar K.V
2019-08-19  7:11       ` Aneesh Kumar K.V
2019-08-19  9:30       ` Aneesh Kumar K.V
2019-08-19  9:30         ` Aneesh Kumar K.V
2019-08-19 20:33         ` Dan Williams
2019-08-19 20:33           ` Dan Williams
2019-08-19 20:33           ` Dan Williams
2019-08-09  7:45 ` [PATCH v5 4/4] mm/nvdimm: Pick the right alignment default when creating dax devices Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V
2019-08-09  7:45   ` Aneesh Kumar K.V

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190809074520.27115-3-aneesh.kumar@linux.ibm.com \
    --to=aneesh.kumar@linux.ibm.com \
    --cc=dan.j.williams@intel.com \
    --cc=linux-mm@kvack.org \
    --cc=linux-nvdimm@lists.01.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.