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nvdimm/namespace: Delete nd_namespace_blk

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Now that none of the configuration paths consider BLK namespaces, delete
the BLK namespace data and supporting code.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/164688417727.2879318.11691110761800109662.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2022-03-09 19:49:37 -08:00
parent fadc38a667
commit 84bd3690bf
6 changed files with 13 additions and 587 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

340
drivers/nvdimm/label.c
View File

@ -968,326 +968,6 @@ static int __pmem_label_update(struct nd_region *nd_region,
return rc;
}
static bool is_old_resource(struct resource *res, struct resource **list, int n)
{
int i;
if (res->flags & DPA_RESOURCE_ADJUSTED)
return false;
for (i = 0; i < n; i++)
if (res == list[i])
return true;
return false;
}
static struct resource *to_resource(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label)
{
struct resource *res;
for_each_dpa_resource(ndd, res) {
if (res->start != nsl_get_dpa(ndd, nd_label))
continue;
if (resource_size(res) != nsl_get_rawsize(ndd, nd_label))
continue;
return res;
}
return NULL;
}
/*
* Use the presence of the type_guid as a flag to determine isetcookie
* usage and nlabel + position policy for blk-aperture namespaces.
*/
static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
u64 isetcookie)
{
if (efi_namespace_label_has(ndd, type_guid)) {
nsl_set_isetcookie(ndd, nd_label, isetcookie);
return;
}
nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */
}
bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
u64 isetcookie)
{
if (!efi_namespace_label_has(ndd, type_guid))
return true;
if (nsl_get_isetcookie(ndd, nd_label) != isetcookie) {
dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", isetcookie,
nsl_get_isetcookie(ndd, nd_label));
return false;
}
return true;
}
static void nsl_set_blk_nlabel(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label, int nlabel,
bool first)
{
if (!efi_namespace_label_has(ndd, type_guid)) {
nsl_set_nlabel(ndd, nd_label, 0); /* N/A */
return;
}
nsl_set_nlabel(ndd, nd_label, first ? nlabel : 0xffff);
}
static void nsl_set_blk_position(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
bool first)
{
if (!efi_namespace_label_has(ndd, type_guid)) {
nsl_set_position(ndd, nd_label, 0);
return;
}
nsl_set_position(ndd, nd_label, first ? 0 : 0xffff);
}
/*
* 1/ Account all the labels that can be freed after this update
* 2/ Allocate and write the label to the staging (next) index
* 3/ Record the resources in the namespace device
*/
static int __blk_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk,
int num_labels)
{
int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO;
struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nd_namespace_common *ndns = &nsblk->common;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_label *nd_label;
struct nd_label_ent *label_ent, *e;
struct nd_namespace_index *nsindex;
unsigned long *free, *victim_map = NULL;
struct resource *res, **old_res_list;
struct nd_label_id label_id;
int min_dpa_idx = 0;
LIST_HEAD(list);
u32 nslot, slot;
if (!preamble_next(ndd, &nsindex, &free, &nslot))
return -ENXIO;
old_res_list = nsblk->res;
nfree = nd_label_nfree(ndd);
old_num_resources = nsblk->num_resources;
nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
/*
* We need to loop over the old resources a few times, which seems a
* bit inefficient, but we need to know that we have the label
* space before we start mutating the tracking structures.
* Otherwise the recovery method of last resort for userspace is
* disable and re-enable the parent region.
*/
alloc = 0;
for_each_dpa_resource(ndd, res) {
if (strcmp(res->name, label_id.id) != 0)
continue;
if (!is_old_resource(res, old_res_list, old_num_resources))
alloc++;
}
victims = 0;
if (old_num_resources) {
/* convert old local-label-map to dimm-slot victim-map */
victim_map = bitmap_zalloc(nslot, GFP_KERNEL);
if (!victim_map)
return -ENOMEM;
/* mark unused labels for garbage collection */
for_each_clear_bit_le(slot, free, nslot) {
nd_label = to_label(ndd, slot);
if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid))
continue;
res = to_resource(ndd, nd_label);
if (res && is_old_resource(res, old_res_list,
old_num_resources))
continue;
slot = to_slot(ndd, nd_label);
set_bit(slot, victim_map);
victims++;
}
}
/* don't allow updates that consume the last label */
if (nfree - alloc < 0 || nfree - alloc + victims < 1) {
dev_info(&nsblk->common.dev, "insufficient label space\n");
bitmap_free(victim_map);
return -ENOSPC;
}
/* from here on we need to abort on error */
/* assign all resources to the namespace before writing the labels */
nsblk->res = NULL;
nsblk->num_resources = 0;
for_each_dpa_resource(ndd, res) {
if (strcmp(res->name, label_id.id) != 0)
continue;
if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) {
rc = -ENOMEM;
goto abort;
}
}
/* release slots associated with any invalidated UUIDs */
mutex_lock(&nd_mapping->lock);
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list)
if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags)) {
reap_victim(nd_mapping, label_ent);
list_move(&label_ent->list, &list);
}
mutex_unlock(&nd_mapping->lock);
/*
* Find the resource associated with the first label in the set
* per the v1.2 namespace specification.
*/
for (i = 0; i < nsblk->num_resources; i++) {
struct resource *min = nsblk->res[min_dpa_idx];
res = nsblk->res[i];
if (res->start < min->start)
min_dpa_idx = i;
}
for (i = 0; i < nsblk->num_resources; i++) {
size_t offset;
res = nsblk->res[i];
if (is_old_resource(res, old_res_list, old_num_resources))
continue; /* carry-over */
slot = nd_label_alloc_slot(ndd);
if (slot == UINT_MAX) {
rc = -ENXIO;
goto abort;
}
dev_dbg(ndd->dev, "allocated: %d\n", slot);
nd_label = to_label(ndd, slot);
memset(nd_label, 0, sizeof_namespace_label(ndd));
nsl_set_uuid(ndd, nd_label, nsblk->uuid);
nsl_set_name(ndd, nd_label, nsblk->alt_name);
nsl_set_flags(ndd, nd_label, NSLABEL_FLAG_LOCAL);
nsl_set_blk_nlabel(ndd, nd_label, nsblk->num_resources,
i == min_dpa_idx);
nsl_set_blk_position(ndd, nd_label, i == min_dpa_idx);
nsl_set_blk_isetcookie(ndd, nd_label, nd_set->cookie2);
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);
nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
nsl_set_claim_class(ndd, nd_label, ndns->claim_class);
nsl_calculate_checksum(ndd, nd_label);
/* update label */
offset = nd_label_offset(ndd, nd_label);
rc = nvdimm_set_config_data(ndd, offset, nd_label,
sizeof_namespace_label(ndd));
if (rc < 0)
goto abort;
}
/* free up now unused slots in the new index */
for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) {
dev_dbg(ndd->dev, "free: %d\n", slot);
nd_label_free_slot(ndd, slot);
}
/* update index */
rc = nd_label_write_index(ndd, ndd->ns_next,
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
if (rc)
goto abort;
/*
* Now that the on-dimm labels are up to date, fix up the tracking
* entries in nd_mapping->labels
*/
nlabel = 0;
mutex_lock(&nd_mapping->lock);
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
nd_label = label_ent->label;
if (!nd_label)
continue;
nlabel++;
if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid))
continue;
nlabel--;
list_move(&label_ent->list, &list);
label_ent->label = NULL;
}
list_splice_tail_init(&list, &nd_mapping->labels);
mutex_unlock(&nd_mapping->lock);
if (nlabel + nsblk->num_resources > num_labels) {
/*
* Bug, we can't end up with more resources than
* available labels
*/
WARN_ON_ONCE(1);
rc = -ENXIO;
goto out;
}
mutex_lock(&nd_mapping->lock);
label_ent = list_first_entry_or_null(&nd_mapping->labels,
typeof(*label_ent), list);
if (!label_ent) {
WARN_ON(1);
mutex_unlock(&nd_mapping->lock);
rc = -ENXIO;
goto out;
}
for_each_clear_bit_le(slot, free, nslot) {
nd_label = to_label(ndd, slot);
if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid))
continue;
res = to_resource(ndd, nd_label);
res->flags &= ~DPA_RESOURCE_ADJUSTED;
dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot);
list_for_each_entry_from(label_ent, &nd_mapping->labels, list) {
if (label_ent->label)
continue;
label_ent->label = nd_label;
nd_label = NULL;
break;
}
if (nd_label)
dev_WARN(&nsblk->common.dev,
"failed to track label slot%d\n", slot);
}
mutex_unlock(&nd_mapping->lock);
out:
kfree(old_res_list);
bitmap_free(victim_map);
return rc;
abort:
/*
* 1/ repair the allocated label bitmap in the index
* 2/ restore the resource list
*/
nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd));
kfree(nsblk->res);
nsblk->res = old_res_list;
nsblk->num_resources = old_num_resources;
old_res_list = NULL;
goto out;
}
static int init_labels(struct nd_mapping *nd_mapping, int num_labels)
{
int i, old_num_labels = 0;
@ -1425,26 +1105,6 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region,
return 0;
}
int nd_blk_namespace_label_update(struct nd_region *nd_region,
struct nd_namespace_blk *nsblk, resource_size_t size)
{
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
struct resource *res;
int count = 0;
if (size == 0)
return del_labels(nd_mapping, nsblk->uuid);
for_each_dpa_resource(to_ndd(nd_mapping), res)
count++;
count = init_labels(nd_mapping, count);
if (count < 0)
return count;
return __blk_label_update(nd_region, nd_mapping, nsblk, count);
}
int __init nd_label_init(void)
{
WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid));

3
drivers/nvdimm/label.h
View File

@ -221,9 +221,6 @@ bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot);
u32 nd_label_nfree(struct nvdimm_drvdata *ndd);
struct nd_region;
struct nd_namespace_pmem;
struct nd_namespace_blk;
int nd_pmem_namespace_label_update(struct nd_region *nd_region,
struct nd_namespace_pmem *nspm, resource_size_t size);
int nd_blk_namespace_label_update(struct nd_region *nd_region,
struct nd_namespace_blk *nsblk, resource_size_t size);
#endif /* __LABEL_H__ */

227
drivers/nvdimm/namespace_devs.c
View File

@ -32,19 +32,6 @@ static void namespace_pmem_release(struct device *dev)
kfree(nspm);
}
static void namespace_blk_release(struct device *dev)
{
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
struct nd_region *nd_region = to_nd_region(dev->parent);
if (nsblk->id >= 0)
ida_simple_remove(&nd_region->ns_ida, nsblk->id);
kfree(nsblk->alt_name);
kfree(nsblk->uuid);
kfree(nsblk->res);
kfree(nsblk);
}
static bool is_namespace_pmem(const struct device *dev);
static bool is_namespace_io(const struct device *dev);
@ -245,65 +232,6 @@ out:
return rc;
}
static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
{
struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent);
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_id label_id;
struct resource *res;
int count, i;
if (!nsblk->uuid || !nsblk->lbasize || !ndd)
return false;
count = 0;
nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
for_each_dpa_resource(ndd, res) {
if (strcmp(res->name, label_id.id) != 0)
continue;
/*
* Resources with unacknowledged adjustments indicate a
* failure to update labels
*/
if (res->flags & DPA_RESOURCE_ADJUSTED)
return false;
count++;
}
/* These values match after a successful label update */
if (count != nsblk->num_resources)
return false;
for (i = 0; i < nsblk->num_resources; i++) {
struct resource *found = NULL;
for_each_dpa_resource(ndd, res)
if (res == nsblk->res[i]) {
found = res;
break;
}
/* stale resource */
if (!found)
return false;
}
return true;
}
resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
{
resource_size_t size;
nvdimm_bus_lock(&nsblk->common.dev);
size = __nd_namespace_blk_validate(nsblk);
nvdimm_bus_unlock(&nsblk->common.dev);
return size;
}
EXPORT_SYMBOL(nd_namespace_blk_validate);
static int nd_namespace_label_update(struct nd_region *nd_region,
struct device *dev)
{
@ -1579,12 +1507,6 @@ static const struct device_type namespace_pmem_device_type = {
.groups = nd_namespace_attribute_groups,
};
static const struct device_type namespace_blk_device_type = {
.name = "nd_namespace_blk",
.release = namespace_blk_release,
.groups = nd_namespace_attribute_groups,
};
static bool is_namespace_pmem(const struct device *dev)
{
return dev ? dev->type == &namespace_pmem_device_type : false;
@ -1964,54 +1886,6 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
return ERR_PTR(rc);
}
struct resource *nsblk_add_resource(struct nd_region *nd_region,
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
resource_size_t start)
{
struct nd_label_id label_id;
struct resource *res;
nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
res = krealloc(nsblk->res,
sizeof(void *) * (nsblk->num_resources + 1),
GFP_KERNEL);
if (!res)
return NULL;
nsblk->res = (struct resource **) res;
for_each_dpa_resource(ndd, res)
if (strcmp(res->name, label_id.id) == 0
&& res->start == start) {
nsblk->res[nsblk->num_resources++] = res;
return res;
}
return NULL;
}
static struct device *nd_namespace_blk_create(struct nd_region *nd_region)
{
struct nd_namespace_blk *nsblk;
struct device *dev;
if (!is_nd_blk(&nd_region->dev))
return NULL;
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
if (!nsblk)
return NULL;
dev = &nsblk->common.dev;
dev->type = &namespace_blk_device_type;
nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
if (nsblk->id < 0) {
kfree(nsblk);
return NULL;
}
dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id);
dev->parent = &nd_region->dev;
return &nsblk->common.dev;
}
static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
{
struct nd_namespace_pmem *nspm;
@ -2050,10 +1924,7 @@ void nd_region_create_ns_seed(struct nd_region *nd_region)
if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO)
return;
if (is_nd_blk(&nd_region->dev))
nd_region->ns_seed = nd_namespace_blk_create(nd_region);
else
nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
/*
* Seed creation failures are not fatal, provisioning is simply
@ -2128,54 +1999,6 @@ static int add_namespace_resource(struct nd_region *nd_region,
return i;
}
static struct device *create_namespace_blk(struct nd_region *nd_region,
struct nd_namespace_label *nd_label, int count)
{
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;
uuid_t uuid;
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);
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
if (!nsblk)
return ERR_PTR(-ENOMEM);
dev = &nsblk->common.dev;
dev->type = &namespace_blk_device_type;
dev->parent = &nd_region->dev;
nsblk->id = -1;
nsblk->lbasize = nsl_get_lbasize(ndd, nd_label);
nsl_get_uuid(ndd, nd_label, &uuid);
nsblk->uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL);
nsblk->common.claim_class = nsl_get_claim_class(ndd, nd_label);
if (!nsblk->uuid)
goto blk_err;
nsl_get_name(ndd, nd_label, name);
if (name[0]) {
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL);
if (!nsblk->alt_name)
goto blk_err;
}
res = nsblk_add_resource(nd_region, ndd, nsblk,
nsl_get_dpa(ndd, nd_label));
if (!res)
goto blk_err;
nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count);
return dev;
blk_err:
namespace_blk_release(dev);
return ERR_PTR(-ENXIO);
}
static int cmp_dpa(const void *a, const void *b)
{
const struct device *dev_a = *(const struct device **) a;
@ -2233,12 +2056,7 @@ static struct device **scan_labels(struct nd_region *nd_region)
kfree(devs);
devs = __devs;
if (is_nd_blk(&nd_region->dev))
dev = create_namespace_blk(nd_region, nd_label, count);
else
dev = create_namespace_pmem(nd_region, nd_mapping,
nd_label);
dev = create_namespace_pmem(nd_region, nd_mapping, nd_label);
if (IS_ERR(dev)) {
switch (PTR_ERR(dev)) {
case -EAGAIN:
@ -2260,30 +2078,21 @@ static struct device **scan_labels(struct nd_region *nd_region)
? "blk" : "pmem", count == 1 ? "" : "s");
if (count == 0) {
struct nd_namespace_pmem *nspm;
/* Publish a zero-sized namespace for userspace to configure. */
nd_mapping_free_labels(nd_mapping);
devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
if (!devs)
goto err;
if (is_nd_blk(&nd_region->dev)) {
struct nd_namespace_blk *nsblk;
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
if (!nsblk)
goto err;
dev = &nsblk->common.dev;
dev->type = &namespace_blk_device_type;
} else {
struct nd_namespace_pmem *nspm;
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
if (!nspm)
goto err;
dev = &nspm->nsio.common.dev;
dev->type = &namespace_pmem_device_type;
nd_namespace_pmem_set_resource(nd_region, nspm, 0);
}
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
if (!nspm)
goto err;
dev = &nspm->nsio.common.dev;
dev->type = &namespace_pmem_device_type;
nd_namespace_pmem_set_resource(nd_region, nspm, 0);
dev->parent = &nd_region->dev;
devs[count++] = dev;
} else if (is_memory(&nd_region->dev)) {
@ -2318,10 +2127,7 @@ static struct device **scan_labels(struct nd_region *nd_region)
err:
if (devs) {
for (i = 0; devs[i]; i++)
if (is_nd_blk(&nd_region->dev))
namespace_blk_release(devs[i]);
else
namespace_pmem_release(devs[i]);
namespace_pmem_release(devs[i]);
kfree(devs);
}
return NULL;
@ -2484,19 +2290,12 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
struct device *dev = devs[i];
int id;
if (type == ND_DEVICE_NAMESPACE_BLK) {
struct nd_namespace_blk *nsblk;
nsblk = to_nd_namespace_blk(dev);
id = ida_simple_get(&nd_region->ns_ida, 0, 0,
GFP_KERNEL);
nsblk->id = id;
} else if (type == ND_DEVICE_NAMESPACE_PMEM) {
if (type == ND_DEVICE_NAMESPACE_PMEM) {
struct nd_namespace_pmem *nspm;
nspm = to_nd_namespace_pmem(dev);
id = ida_simple_get(&nd_region->ns_ida, 0, 0,
GFP_KERNEL);
GFP_KERNEL);
nspm->id = id;
} else
id = i;

3
drivers/nvdimm/nd-core.h
View File

@ -150,9 +150,6 @@ int nd_region_conflict(struct nd_region *nd_region, resource_size_t start,
resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
struct nd_label_id *label_id);
int alias_dpa_busy(struct device *dev, void *data);
struct resource *nsblk_add_resource(struct nd_region *nd_region,
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
resource_size_t start);
int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd);
void get_ndd(struct nvdimm_drvdata *ndd);
resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns);

1
drivers/nvdimm/nd.h
View File

@ -687,7 +687,6 @@ static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
return false;
}
resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
const uuid_t *nd_dev_to_uuid(struct device *dev);
bool pmem_should_map_pages(struct device *dev);
#endif /* __ND_H__ */

26
include/linux/nd.h
View File

@ -136,27 +136,6 @@ struct nd_namespace_pmem {
int id;
};
/**
* struct nd_namespace_blk - namespace for dimm-bounded persistent memory
* @alt_name: namespace name supplied in the dimm label
* @uuid: namespace name supplied in the dimm label
* @id: ida allocated id
* @lbasize: blk namespaces have a native sector size when btt not present
* @size: sum of all the resource ranges allocated to this namespace
* @num_resources: number of dpa extents to claim
* @res: discontiguous dpa extents for given dimm
*/
struct nd_namespace_blk {
struct nd_namespace_common common;
char *alt_name;
uuid_t *uuid;
int id;
unsigned long lbasize;
resource_size_t size;
int num_resources;
struct resource **res;
};
static inline struct nd_namespace_io *to_nd_namespace_io(const struct device *dev)
{
return container_of(dev, struct nd_namespace_io, common.dev);
@ -169,11 +148,6 @@ static inline struct nd_namespace_pmem *to_nd_namespace_pmem(const struct device
return container_of(nsio, struct nd_namespace_pmem, nsio);
}
static inline struct nd_namespace_blk *to_nd_namespace_blk(const struct device *dev)
{
return container_of(dev, struct nd_namespace_blk, common.dev);
}
/**
* nvdimm_read_bytes() - synchronously read bytes from an nvdimm namespace
* @ndns: device to read