libnvdimm/labels: Introduce label setter helpers

In preparation for LIBNVDIMM to manage labels on CXL devices deploy
helpers that abstract the label type from the implementation. The CXL
label format is mostly similar to the EFI label format with concepts /
fields added, like dynamic region creation and label type guids, and
other concepts removed like BLK-mode and interleave-set-cookie ids.

Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/162982114123.1124374.17153270107594686116.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index b3feaf3699f7..9bf9cd4a9a2d 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -47,42 +47,89 @@ static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd,
 	return memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
 }
 
+static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd,
+			       struct nd_namespace_label *nd_label, u8 *name)
+{
+	if (!name)
+		return NULL;
+	return memcpy(nd_label->name, name, NSLABEL_NAME_LEN);
+}
+
 static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd,
 			       struct nd_namespace_label *nd_label)
 {
 	return __le32_to_cpu(nd_label->slot);
 }
 
+static inline void nsl_set_slot(struct nvdimm_drvdata *ndd,
+				struct nd_namespace_label *nd_label, u32 slot)
+{
+	nd_label->slot = __cpu_to_le32(slot);
+}
+
 static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd,
 				   struct nd_namespace_label *nd_label)
 {
 	return __le64_to_cpu(nd_label->checksum);
 }
 
+static inline void nsl_set_checksum(struct nvdimm_drvdata *ndd,
+				    struct nd_namespace_label *nd_label,
+				    u64 checksum)
+{
+	nd_label->checksum = __cpu_to_le64(checksum);
+}
+
 static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd,
 				struct nd_namespace_label *nd_label)
 {
 	return __le32_to_cpu(nd_label->flags);
 }
 
+static inline void nsl_set_flags(struct nvdimm_drvdata *ndd,
+				 struct nd_namespace_label *nd_label, u32 flags)
+{
+	nd_label->flags = __cpu_to_le32(flags);
+}
+
 static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd,
 			      struct nd_namespace_label *nd_label)
 {
 	return __le64_to_cpu(nd_label->dpa);
 }
 
+static inline void nsl_set_dpa(struct nvdimm_drvdata *ndd,
+			       struct nd_namespace_label *nd_label, u64 dpa)
+{
+	nd_label->dpa = __cpu_to_le64(dpa);
+}
+
 static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd,
 				  struct nd_namespace_label *nd_label)
 {
 	return __le64_to_cpu(nd_label->rawsize);
 }
 
+static inline void nsl_set_rawsize(struct nvdimm_drvdata *ndd,
+				   struct nd_namespace_label *nd_label,
+				   u64 rawsize)
+{
+	nd_label->rawsize = __cpu_to_le64(rawsize);
+}
+
 static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd,
 				     struct nd_namespace_label *nd_label)
 {
 	return __le64_to_cpu(nd_label->isetcookie);
 }
 
+static inline void nsl_set_isetcookie(struct nvdimm_drvdata *ndd,
+				      struct nd_namespace_label *nd_label,
+				      u64 isetcookie)
+{
+	nd_label->isetcookie = __cpu_to_le64(isetcookie);
+}
+
 static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd,
 					   struct nd_namespace_label *nd_label,
 					   u64 cookie)
@@ -96,18 +143,40 @@ static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd,
 	return __le16_to_cpu(nd_label->position);
 }
 
+static inline void nsl_set_position(struct nvdimm_drvdata *ndd,
+				    struct nd_namespace_label *nd_label,
+				    u16 position)
+{
+	nd_label->position = __cpu_to_le16(position);
+}
+
+
 static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd,
 				 struct nd_namespace_label *nd_label)
 {
 	return __le16_to_cpu(nd_label->nlabel);
 }
 
+static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd,
+				  struct nd_namespace_label *nd_label,
+				  u16 nlabel)
+{
+	nd_label->nlabel = __cpu_to_le16(nlabel);
+}
+
 static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
 				  struct nd_namespace_label *nd_label)
 {
 	return __le64_to_cpu(nd_label->lbasize);
 }
 
+static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
+				   struct nd_namespace_label *nd_label,
+				   u64 lbasize)
+{
+	nd_label->lbasize = __cpu_to_le64(lbasize);
+}
+
 struct nd_region_data {
 	int ns_count;
 	int ns_active;