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| author | Dan Williams <dan.j.williams@intel.com> | 2017-06-03 12:30:43 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-16 00:31:39 +0300 |
| commit | 564e871aa66f548a947b23808d3140f326381f0c (patch) | |
| tree | b1c2b0c45f296df59d1924847d97f86add22d7c1 /drivers/nvdimm/nd.h | |
| parent | 87085ff2e90ecfa91f8bb0cb0ce19ea661bd6f83 (diff) | |
| download | linux-564e871aa66f548a947b23808d3140f326381f0c.tar.xz | |
libnvdimm, label: add v1.2 nvdimm label definitions
In support of improved interoperability between operating systems and pre-boot
environments the Intel proposed NVDIMM Namespace Specification [1], has been
adopted and modified to the the UEFI 2.7 NVDIMM Label Protocol [2].
Update the definitions of the namespace label data structures so that the new
format can be supported alongside the existing label format.
The new specification changes the default label size to 256 bytes, so
everywhere that relied on sizeof(struct nd_namespace_label) must now use the
sizeof_namespace_label() helper.
There should be no functional differences from these changes as the
default is still the v1.1 128-byte format. Future patches will move the
default to the v1.2 definition.
[1]: http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf
[2]: http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/nd.h')
| -rw-r--r-- | drivers/nvdimm/nd.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 03852d738eec..28d9f4481547 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -42,7 +42,7 @@ struct nd_poison { struct nvdimm_drvdata { struct device *dev; - int nsindex_size; + int nsindex_size, nslabel_size; struct nd_cmd_get_config_size nsarea; void *data; int ns_current, ns_next; @@ -96,6 +96,12 @@ static inline struct nd_namespace_index *to_next_namespace_index( return to_namespace_index(ndd, ndd->ns_next); } +unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd); + +#define namespace_label_has(ndd, field) \ + (offsetof(struct nd_namespace_label, field) \ + < sizeof_namespace_label(ndd)) + #define nd_dbg_dpa(r, d, res, fmt, arg...) \ dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \ (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \ |