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authorAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>2019-09-05 21:16:00 +0530
committerDan Williams <dan.j.williams@intel.com>2019-09-05 16:11:14 -0700
commitedbb52c24441ab5203b969eca759483cb533f36d (patch)
tree665648762062a8383fffc6b1e959414f52d330a4 /drivers/nvdimm/pfn_devs.c
parente96f0bf2ec92da2bc9c11b0d69e9086f076e7f0b (diff)
libnvdimm/pfn_dev: Add page size and struct page size to pfn superblock
This is needed so that pmem probe 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> Link: https://lore.kernel.org/r/20190905154603.10349-5-aneesh.kumar@linux.ibm.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
-rw-r--r--drivers/nvdimm/pfn_devs.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index cd120feb9213..ce9ef18282dd 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -460,6 +460,11 @@ 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) {
+ 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 +480,22 @@ 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) &&
+ (mode == PFN_MODE_PMEM)) {
+ 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)) &&
+ (mode == PFN_MODE_PMEM)) {
+ 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
@@ -730,8 +751,10 @@ 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(MAX_STRUCT_PAGE_SIZE);
+ 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);