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libnvdimm/labels: Introduce label setter helpers
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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 <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Link: https://lore.kernel.org/r/162982114123.1124374.17153270107594686116.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <[email protected]>
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@djbw
djbw committed Aug 24, 2021
1 parent 9761b02 commit 8176f14
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Showing 3 changed files with 99 additions and 33 deletions.
61 changes: 29 additions & 32 deletions drivers/nvdimm/label.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -358,9 +358,9 @@ static bool slot_valid(struct nvdimm_drvdata *ndd,
u64 sum, sum_save;

sum_save = nsl_get_checksum(ndd, nd_label);
nd_label->checksum = __cpu_to_le64(0);
nsl_set_checksum(ndd, nd_label, 0);
sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1);
nd_label->checksum = __cpu_to_le64(sum_save);
nsl_set_checksum(ndd, nd_label, sum_save);
if (sum != sum_save) {
dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n",
slot, sum);
Expand Down Expand Up @@ -797,16 +797,15 @@ static int __pmem_label_update(struct nd_region *nd_region,
nd_label = to_label(ndd, slot);
memset(nd_label, 0, sizeof_namespace_label(ndd));
memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN);
if (nspm->alt_name)
memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN);
nd_label->flags = __cpu_to_le32(flags);
nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings);
nd_label->position = __cpu_to_le16(pos);
nd_label->isetcookie = __cpu_to_le64(cookie);
nd_label->rawsize = __cpu_to_le64(resource_size(res));
nd_label->lbasize = __cpu_to_le64(nspm->lbasize);
nd_label->dpa = __cpu_to_le64(res->start);
nd_label->slot = __cpu_to_le32(slot);
nsl_set_name(ndd, nd_label, nspm->alt_name);
nsl_set_flags(ndd, nd_label, flags);
nsl_set_nlabel(ndd, nd_label, nd_region->ndr_mappings);
nsl_set_position(ndd, nd_label, pos);
nsl_set_isetcookie(ndd, nd_label, cookie);
nsl_set_rawsize(ndd, nd_label, resource_size(res));
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);
if (namespace_label_has(ndd, abstraction_guid))
Expand All @@ -816,9 +815,9 @@ static int __pmem_label_update(struct nd_region *nd_region,
if (namespace_label_has(ndd, checksum)) {
u64 sum;

nd_label->checksum = __cpu_to_le64(0);
nsl_set_checksum(ndd, nd_label, 0);
sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1);
nd_label->checksum = __cpu_to_le64(sum);
nsl_set_checksum(ndd, nd_label, sum);
}
nd_dbg_dpa(nd_region, ndd, res, "\n");

Expand Down Expand Up @@ -1017,10 +1016,8 @@ static int __blk_label_update(struct nd_region *nd_region,
nd_label = to_label(ndd, slot);
memset(nd_label, 0, sizeof_namespace_label(ndd));
memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN);
if (nsblk->alt_name)
memcpy(nd_label->name, nsblk->alt_name,
NSLABEL_NAME_LEN);
nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL);
nsl_set_name(ndd, nd_label, nsblk->alt_name);
nsl_set_flags(ndd, nd_label, NSLABEL_FLAG_LOCAL);

/*
* Use the presence of the type_guid as a flag to
Expand All @@ -1029,23 +1026,23 @@ static int __blk_label_update(struct nd_region *nd_region,
*/
if (namespace_label_has(ndd, type_guid)) {
if (i == min_dpa_idx) {
nd_label->nlabel = __cpu_to_le16(nsblk->num_resources);
nd_label->position = __cpu_to_le16(0);
nsl_set_nlabel(ndd, nd_label, nsblk->num_resources);
nsl_set_position(ndd, nd_label, 0);
} else {
nd_label->nlabel = __cpu_to_le16(0xffff);
nd_label->position = __cpu_to_le16(0xffff);
nsl_set_nlabel(ndd, nd_label, 0xffff);
nsl_set_position(ndd, nd_label, 0xffff);
}
nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2);
nsl_set_isetcookie(ndd, nd_label, nd_set->cookie2);
} else {
nd_label->nlabel = __cpu_to_le16(0); /* N/A */
nd_label->position = __cpu_to_le16(0); /* N/A */
nd_label->isetcookie = __cpu_to_le64(0); /* N/A */
nsl_set_nlabel(ndd, nd_label, 0); /* N/A */
nsl_set_position(ndd, nd_label, 0); /* N/A */
nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */
}

nd_label->dpa = __cpu_to_le64(res->start);
nd_label->rawsize = __cpu_to_le64(resource_size(res));
nd_label->lbasize = __cpu_to_le64(nsblk->lbasize);
nd_label->slot = __cpu_to_le32(slot);
nsl_set_dpa(ndd, nd_label, res->start);
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);
if (namespace_label_has(ndd, abstraction_guid))
Expand All @@ -1056,10 +1053,10 @@ static int __blk_label_update(struct nd_region *nd_region,
if (namespace_label_has(ndd, checksum)) {
u64 sum;

nd_label->checksum = __cpu_to_le64(0);
nsl_set_checksum(ndd, nd_label, 0);
sum = nd_fletcher64(nd_label,
sizeof_namespace_label(ndd), 1);
nd_label->checksum = __cpu_to_le64(sum);
nsl_set_checksum(ndd, nd_label, sum);
}

/* update label */
Expand Down
2 changes: 1 addition & 1 deletion drivers/nvdimm/namespace_devs.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2569,7 +2569,7 @@ static int init_active_labels(struct nd_region *nd_region)
u32 flags = nsl_get_flags(ndd, label);

flags &= ~NSLABEL_FLAG_LOCAL;
label->flags = __cpu_to_le32(flags);
nsl_set_flags(ndd, label, flags);
}
label_ent->label = label;

Expand Down
69 changes: 69 additions & 0 deletions drivers/nvdimm/nd.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand All @@ -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;
Expand Down

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