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authorDan Williams <dan.j.williams@intel.com>2021-08-24 19:06:02 +0300
committerDan Williams <dan.j.williams@intel.com>2021-08-24 22:08:28 +0300
commit8b03aa0e0e5aea61d5a7fc6434faba2a05a6095b (patch)
treea08e4500bcbcc806d44b11a948859f41c268a575 /drivers/nvdimm
parentde8fa48b9a281e69f944c58ae2adbd8a277787a6 (diff)
downloadlinux-8b03aa0e0e5aea61d5a7fc6434faba2a05a6095b.tar.xz
libnvdimm/labels: Add type-guid helpers
In preparation for CXL label support, which does not have the type-guid concept, wrap the existing users with nsl_set_type_guid, and nsl_validate_type_guid. Recall that the type-guid is a value in the ACPI NFIT table to indicate how the memory range is used / should be presented to upper layers. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/162982116208.1124374.13938280892226800953.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/label.c26
-rw-r--r--drivers/nvdimm/namespace_devs.c19
-rw-r--r--drivers/nvdimm/nd.h2
3 files changed, 28 insertions, 19 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 7188675c0955..294ffc3cb582 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -772,6 +772,26 @@ static void reap_victim(struct nd_mapping *nd_mapping,
victim->label = NULL;
}
+static void nsl_set_type_guid(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label, guid_t *guid)
+{
+ if (namespace_label_has(ndd, type_guid))
+ guid_copy(&nd_label->type_guid, guid);
+}
+
+bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label, guid_t *guid)
+{
+ if (!namespace_label_has(ndd, type_guid))
+ return true;
+ if (!guid_equal(&nd_label->type_guid, guid)) {
+ dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", guid,
+ &nd_label->type_guid);
+ return false;
+ }
+ return true;
+}
+
static int __pmem_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
int pos, unsigned long flags)
@@ -822,8 +842,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
nsl_set_lbasize(ndd, nd_label, nspm->lbasize);
nsl_set_dpa(ndd, nd_label, res->start);
nsl_set_slot(ndd, nd_label, slot);
- if (namespace_label_has(ndd, type_guid))
- guid_copy(&nd_label->type_guid, &nd_set->type_guid);
+ nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
if (namespace_label_has(ndd, abstraction_guid))
guid_copy(&nd_label->abstraction_guid,
to_abstraction_guid(ndns->claim_class,
@@ -1091,8 +1110,7 @@ static int __blk_label_update(struct nd_region *nd_region,
nsl_set_rawsize(ndd, nd_label, resource_size(res));
nsl_set_lbasize(ndd, nd_label, nsblk->lbasize);
nsl_set_slot(ndd, nd_label, slot);
- if (namespace_label_has(ndd, type_guid))
- guid_copy(&nd_label->type_guid, &nd_set->type_guid);
+ nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
if (namespace_label_has(ndd, abstraction_guid))
guid_copy(&nd_label->abstraction_guid,
to_abstraction_guid(ndns->claim_class,
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index fbd0c2fcea4a..af5a31dd3147 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1859,14 +1859,9 @@ 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,
- &nd_label->type_guid);
+ if (!nsl_validate_type_guid(ndd, nd_label,
+ &nd_set->type_guid))
continue;
- }
if (found_uuid) {
dev_dbg(ndd->dev, "duplicate entry for uuid\n");
@@ -2265,14 +2260,8 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
struct device *dev = NULL;
struct resource *res;
- if (namespace_label_has(ndd, type_guid)) {
- if (!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,
- &nd_label->type_guid);
- return ERR_PTR(-EAGAIN);
- }
- }
+ if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid))
+ return ERR_PTR(-EAGAIN);
if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2))
return ERR_PTR(-EAGAIN);
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 955c4395a8e3..a3e215f2d837 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -180,6 +180,8 @@ static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
u64 isetcookie);
+bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label, guid_t *guid);
struct nd_region_data {
int ns_count;