libnvdimm, label: populate the type_guid property for v1.2 namespaces
The type_guid refers to the "Address Range Type GUID" for the region
backing a namespace as defined the ACPI NFIT (NVDIMM Firmware Interface
Table). This 'type' identifier specifies an access mechanism for the
given namespace. This capability replaces the confusing usage of the
'NSLABEL_FLAG_LOCAL' flag to indicate a block-aperture-mode namespace.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index e034b00..e101aec 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1639,6 +1639,8 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
+ struct nd_interleave_set *nd_set = nd_region->nd_set;
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_ent *label_ent;
bool found_uuid = false;
@@ -1659,8 +1661,17 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
continue;
+ if (namespace_label_has(ndd, type_guid)
+ && !guid_equal(&nd_set->type_guid,
+ &nd_label->type_guid)) {
+ dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
+ nd_set->type_guid.b,
+ nd_label->type_guid.b);
+ continue;
+ }
+
if (found_uuid) {
- dev_dbg(to_ndd(nd_mapping)->dev,
+ dev_dbg(ndd->dev,
"%s duplicate entry for uuid\n",
__func__);
return false;
@@ -2047,12 +2058,21 @@ struct device *create_namespace_blk(struct nd_region *nd_region,
{
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_blk *nsblk;
char name[NSLABEL_NAME_LEN];
struct device *dev = NULL;
struct resource *res;
+ if (namespace_label_has(ndd, type_guid)
+ && !guid_equal(&nd_set->type_guid,
+ &nd_label->type_guid)) {
+ dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
+ nd_set->type_guid.b, nd_label->type_guid.b);
+ return ERR_PTR(-EAGAIN);
+ }
+
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
if (!nsblk)
return ERR_PTR(-ENOMEM);
@@ -2144,31 +2164,30 @@ static struct device **scan_labels(struct nd_region *nd_region)
kfree(devs);
devs = __devs;
- if (is_nd_blk(&nd_region->dev)) {
+ if (is_nd_blk(&nd_region->dev))
dev = create_namespace_blk(nd_region, nd_label, count);
- if (IS_ERR(dev))
- goto err;
- devs[count++] = dev;
- } else {
+ else {
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_index *nsindex;
nsindex = to_namespace_index(ndd, ndd->ns_current);
dev = create_namespace_pmem(nd_region, nsindex, nd_label);
- if (IS_ERR(dev)) {
- switch (PTR_ERR(dev)) {
- case -EAGAIN:
- /* skip invalid labels */
- continue;
- case -ENODEV:
- /* fallthrough to seed creation */
- break;
- default:
- goto err;
- }
- } else
- devs[count++] = dev;
}
+
+ if (IS_ERR(dev)) {
+ switch (PTR_ERR(dev)) {
+ case -EAGAIN:
+ /* skip invalid labels */
+ continue;
+ case -ENODEV:
+ /* fallthrough to seed creation */
+ break;
+ default:
+ goto err;
+ }
+ } else
+ devs[count++] = dev;
+
}
dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n",