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| author | Dan Williams <dan.j.williams@intel.com> | 2015-12-12 16:09:14 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-12-13 11:40:20 -0800 |
| commit | a34d5e8a6ad1a31b186019c9c351777626698863 (patch) | |
| tree | 8ca570f659c71e0118486dda5249d5cf7908bdc0 /drivers/nvdimm/pfn_devs.c | |
| parent | 315c562536c42aa4da9b6c5a2135dd6715a5e0b5 (diff) | |
| download | linux-a34d5e8a6ad1a31b186019c9c351777626698863.tar.bz2 | |
libnvdimm, pfn: add parent uuid validation
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>
Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
| -rw-r--r-- | drivers/nvdimm/pfn_devs.c | 10 |
1 files changed, 7 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; |