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libnvdimm/labels: Add uuid helpers

Browse Source 
In preparation for CXL labels that move the uuid to a different offset
in the label, add nsl_{ref,get,validate}_uuid(). These helpers use the
proper uuid_t type. That type definition predated the libnvdimm
subsystem, so now is as a good a time as any to convert all the uuid
handling in the subsystem to uuid_t to match the helpers.

Note that the uuid fields in the label data and superblocks is not
replaced per Andy's expectation that uuid_t is a kernel internal type
not to appear in external ABI interfaces. So, in those case
{import,export}_uuid() is used to go between the 2 types.

Also note that this rework uncovered some unnecessary copies for label
comparisons, those are cleaned up with nsl_uuid_equal().

As for the whitespace changes, all new code is clang-format compliant.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116429748.2460985.15659993454313919977.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2021-09-08 22:11:37 -07:00
parent e4e737bb5c
commit d1c6e08e75
9 changed files with 124 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/nvdimm/btt.c
View File

@ -973,7 +973,7 @@ static int btt_arena_write_layout(struct arena_info *arena)
u64 sum;
struct btt_sb *super;
struct nd_btt *nd_btt = arena->nd_btt;
const u8 *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev);
const uuid_t *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev);
ret = btt_map_init(arena);
if (ret)
@ -988,8 +988,8 @@ static int btt_arena_write_layout(struct arena_info *arena)
return -ENOMEM;
strncpy(super->signature, BTT_SIG, BTT_SIG_LEN);
memcpy(super->uuid, nd_btt->uuid, 16);
memcpy(super->parent_uuid, parent_uuid, 16);
export_uuid(super->uuid, nd_btt->uuid);
export_uuid(super->parent_uuid, parent_uuid);
super->flags = cpu_to_le32(arena->flags);
super->version_major = cpu_to_le16(arena->version_major);
super->version_minor = cpu_to_le16(arena->version_minor);
@ -1575,7 +1575,8 @@ static void btt_blk_cleanup(struct btt *btt)
* Pointer to a new struct btt on success, NULL on failure.
*/
static struct btt *btt_init(struct nd_btt *nd_btt, unsigned long long rawsize,
u32 lbasize, u8 *uuid, struct nd_region *nd_region)
u32 lbasize, uuid_t *uuid,
struct nd_region *nd_region)
{
int ret;
struct btt *btt;

12
drivers/nvdimm/btt_devs.c
View File

@ -180,7 +180,7 @@ bool is_nd_btt(struct device *dev)
EXPORT_SYMBOL(is_nd_btt);
static struct device *__nd_btt_create(struct nd_region *nd_region,
unsigned long lbasize, u8 *uuid,
unsigned long lbasize, uuid_t *uuid,
struct nd_namespace_common *ndns)
{
struct nd_btt *nd_btt;
@ -244,14 +244,16 @@ struct device *nd_btt_create(struct nd_region *nd_region)
*/
bool nd_btt_arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super)
{
const u8 *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev);
const uuid_t *ns_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev);
uuid_t parent_uuid;
u64 checksum;
if (memcmp(super->signature, BTT_SIG, BTT_SIG_LEN) != 0)
return false;
if (!guid_is_null((guid_t *)&super->parent_uuid))
if (memcmp(super->parent_uuid, parent_uuid, 16) != 0)
import_uuid(&parent_uuid, super->parent_uuid);
if (!uuid_is_null(&parent_uuid))
if (!uuid_equal(&parent_uuid, ns_uuid))
return false;
checksum = le64_to_cpu(super->checksum);
@ -319,7 +321,7 @@ static int __nd_btt_probe(struct nd_btt *nd_btt,
return rc;
nd_btt->lbasize = le32_to_cpu(btt_sb->external_lbasize);
nd_btt->uuid = kmemdup(btt_sb->uuid, 16, GFP_KERNEL);
nd_btt->uuid = kmemdup(&btt_sb->uuid, sizeof(uuid_t), GFP_KERNEL);
if (!nd_btt->uuid)
return -ENOMEM;

40
drivers/nvdimm/core.c
View File

@ -206,38 +206,6 @@ struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus)
}
EXPORT_SYMBOL_GPL(to_nvdimm_bus_dev);
static bool is_uuid_sep(char sep)
{
if (sep == '\n' || sep == '-' || sep == ':' || sep == '\0')
return true;
return false;
}
static int nd_uuid_parse(struct device *dev, u8 *uuid_out, const char *buf,
size_t len)
{
const char *str = buf;
u8 uuid[16];
int i;
for (i = 0; i < 16; i++) {
if (!isxdigit(str[0]) || !isxdigit(str[1])) {
dev_dbg(dev, "pos: %d buf[%zd]: %c buf[%zd]: %c\n",
i, str - buf, str[0],
str + 1 - buf, str[1]);
return -EINVAL;
}
uuid[i] = (hex_to_bin(str[0]) << 4) | hex_to_bin(str[1]);
str += 2;
if (is_uuid_sep(*str))
str++;
}
memcpy(uuid_out, uuid, sizeof(uuid));
return 0;
}
/**
* nd_uuid_store: common implementation for writing 'uuid' sysfs attributes
* @dev: container device for the uuid property
@ -248,21 +216,21 @@ static int nd_uuid_parse(struct device *dev, u8 *uuid_out, const char *buf,
* (driver detached)
* LOCKING: expects nd_device_lock() is held on entry
*/
int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
int nd_uuid_store(struct device *dev, uuid_t **uuid_out, const char *buf,
size_t len)
{
u8 uuid[16];
uuid_t uuid;
int rc;
if (dev->driver)
return -EBUSY;
rc = nd_uuid_parse(dev, uuid, buf, len);
rc = uuid_parse(buf, &uuid);
if (rc)
return rc;
kfree(*uuid_out);
*uuid_out = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
*uuid_out = kmemdup(&uuid, sizeof(uuid), GFP_KERNEL);
if (!(*uuid_out))
return -ENOMEM;

34
drivers/nvdimm/label.c
View File

@ -321,7 +321,8 @@ static bool preamble_index(struct nvdimm_drvdata *ndd, int idx,
return true;
}
char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags)
char *nd_label_gen_id(struct nd_label_id *label_id, const uuid_t *uuid,
u32 flags)
{
if (!label_id || !uuid)
return NULL;
@ -400,9 +401,9 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
struct nvdimm *nvdimm = to_nvdimm(ndd->dev);
struct nd_namespace_label *nd_label;
struct nd_region *nd_region = NULL;
u8 label_uuid[NSLABEL_UUID_LEN];
struct nd_label_id label_id;
struct resource *res;
uuid_t label_uuid;
u32 flags;
nd_label = to_label(ndd, slot);
@ -410,11 +411,11 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
if (!slot_valid(ndd, nd_label, slot))
continue;
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
nsl_get_uuid(ndd, nd_label, &label_uuid);
flags = nsl_get_flags(ndd, nd_label);
if (test_bit(NDD_NOBLK, &nvdimm->flags))
flags &= ~NSLABEL_FLAG_LOCAL;
nd_label_gen_id(&label_id, label_uuid, flags);
nd_label_gen_id(&label_id, &label_uuid, flags);
res = nvdimm_allocate_dpa(ndd, &label_id,
nsl_get_dpa(ndd, nd_label),
nsl_get_rawsize(ndd, nd_label));
@ -851,7 +852,7 @@ 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);
nsl_set_uuid(ndd, nd_label, nspm->uuid);
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);
@ -878,9 +879,8 @@ static int __pmem_label_update(struct nd_region *nd_region,
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
if (!label_ent->label)
continue;
if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags)
|| memcmp(nspm->uuid, label_ent->label->uuid,
NSLABEL_UUID_LEN) == 0)
if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) ||
nsl_uuid_equal(ndd, label_ent->label, nspm->uuid))
reap_victim(nd_mapping, label_ent);
}
@ -1005,7 +1005,6 @@ static int __blk_label_update(struct nd_region *nd_region,
unsigned long *free, *victim_map = NULL;
struct resource *res, **old_res_list;
struct nd_label_id label_id;
u8 uuid[NSLABEL_UUID_LEN];
int min_dpa_idx = 0;
LIST_HEAD(list);
u32 nslot, slot;
@ -1043,8 +1042,7 @@ static int __blk_label_update(struct nd_region *nd_region,
/* mark unused labels for garbage collection */
for_each_clear_bit_le(slot, free, nslot) {
nd_label = to_label(ndd, slot);
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
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,
@ -1113,7 +1111,7 @@ 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);
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);
@ -1161,8 +1159,7 @@ static int __blk_label_update(struct nd_region *nd_region,
if (!nd_label)
continue;
nlabel++;
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid))
continue;
nlabel--;
list_move(&label_ent->list, &list);
@ -1192,8 +1189,7 @@ static int __blk_label_update(struct nd_region *nd_region,
}
for_each_clear_bit_le(slot, free, nslot) {
nd_label = to_label(ndd, slot);
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid))
continue;
res = to_resource(ndd, nd_label);
res->flags &= ~DPA_RESOURCE_ADJUSTED;
@ -1273,12 +1269,11 @@ static int init_labels(struct nd_mapping *nd_mapping, int num_labels)
return max(num_labels, old_num_labels);
}
static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
static int del_labels(struct nd_mapping *nd_mapping, uuid_t *uuid)
{
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_ent *label_ent, *e;
struct nd_namespace_index *nsindex;
u8 label_uuid[NSLABEL_UUID_LEN];
unsigned long *free;
LIST_HEAD(list);
u32 nslot, slot;
@ -1298,8 +1293,7 @@ static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
if (!nd_label)
continue;
active++;
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0)
if (!nsl_uuid_equal(ndd, nd_label, uuid))
continue;
active--;
slot = to_slot(ndd, nd_label);

86
drivers/nvdimm/namespace_devs.c
View File

@ -51,7 +51,7 @@ static bool is_namespace_io(const struct device *dev);
static int is_uuid_busy(struct device *dev, void *data)
{
u8 *uuid1 = data, *uuid2 = NULL;
uuid_t *uuid1 = data, *uuid2 = NULL;
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@ -71,7 +71,7 @@ static int is_uuid_busy(struct device *dev, void *data)
uuid2 = nd_pfn->uuid;
}
if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0)
if (uuid2 && uuid_equal(uuid1, uuid2))
return -EBUSY;
return 0;
@ -89,7 +89,7 @@ static int is_namespace_uuid_busy(struct device *dev, void *data)
* @dev: any device on a nvdimm_bus
* @uuid: uuid to check
*/
bool nd_is_uuid_unique(struct device *dev, u8 *uuid)
bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid)
{
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@ -192,12 +192,10 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
}
EXPORT_SYMBOL(nvdimm_namespace_disk_name);
const u8 *nd_dev_to_uuid(struct device *dev)
const uuid_t *nd_dev_to_uuid(struct device *dev)
{
static const u8 null_uuid[16];
if (!dev)
return null_uuid;
return &uuid_null;
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@ -208,7 +206,7 @@ const u8 *nd_dev_to_uuid(struct device *dev)
return nsblk->uuid;
} else
return null_uuid;
return &uuid_null;
}
EXPORT_SYMBOL(nd_dev_to_uuid);
@ -938,7 +936,8 @@ static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
res->end = res->start + size - 1;
}
static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)
static bool uuid_not_set(const uuid_t *uuid, struct device *dev,
const char *where)
{
if (!uuid) {
dev_dbg(dev, "%s: uuid not set\n", where);
@ -957,7 +956,7 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
struct nd_label_id label_id;
u32 flags = 0, remainder;
int rc, i, id = -1;
u8 *uuid = NULL;
uuid_t *uuid = NULL;
if (dev->driver || ndns->claim)
return -EBUSY;
@ -1050,7 +1049,7 @@ static ssize_t size_store(struct device *dev,
{
struct nd_region *nd_region = to_nd_region(dev->parent);
unsigned long long val;
u8 **uuid = NULL;
uuid_t **uuid = NULL;
int rc;
rc = kstrtoull(buf, 0, &val);
@ -1147,7 +1146,7 @@ static ssize_t size_show(struct device *dev,
}
static DEVICE_ATTR(size, 0444, size_show, size_store);
static u8 *namespace_to_uuid(struct device *dev)
static uuid_t *namespace_to_uuid(struct device *dev)
{
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@ -1161,10 +1160,10 @@ static u8 *namespace_to_uuid(struct device *dev)
return ERR_PTR(-ENXIO);
}
static ssize_t uuid_show(struct device *dev,
struct device_attribute *attr, char *buf)
static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
u8 *uuid = namespace_to_uuid(dev);
uuid_t *uuid = namespace_to_uuid(dev);
if (IS_ERR(uuid))
return PTR_ERR(uuid);
@ -1181,7 +1180,8 @@ static ssize_t uuid_show(struct device *dev,
* @old_uuid: reference to the uuid storage location in the namespace object
*/
static int namespace_update_uuid(struct nd_region *nd_region,
struct device *dev, u8 *new_uuid, u8 **old_uuid)
struct device *dev, uuid_t *new_uuid,
uuid_t **old_uuid)
{
u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0;
struct nd_label_id old_label_id;
@ -1231,10 +1231,12 @@ static int namespace_update_uuid(struct nd_region *nd_region,
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
struct nd_namespace_label *nd_label = label_ent->label;
struct nd_label_id label_id;
uuid_t uuid;
if (!nd_label)
continue;
nd_label_gen_id(&label_id, nd_label->uuid,
nsl_get_uuid(ndd, nd_label, &uuid);
nd_label_gen_id(&label_id, &uuid,
nsl_get_flags(ndd, nd_label));
if (strcmp(old_label_id.id, label_id.id) == 0)
set_bit(ND_LABEL_REAP, &label_ent->flags);
@ -1251,9 +1253,9 @@ static ssize_t uuid_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct nd_region *nd_region = to_nd_region(dev->parent);
u8 *uuid = NULL;
uuid_t *uuid = NULL;
uuid_t **ns_uuid;
ssize_t rc = 0;
u8 **ns_uuid;
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@ -1378,8 +1380,8 @@ static ssize_t dpa_extents_show(struct device *dev,
{
struct nd_region *nd_region = to_nd_region(dev->parent);
struct nd_label_id label_id;
uuid_t *uuid = NULL;
int count = 0, i;
u8 *uuid = NULL;
u32 flags = 0;
nvdimm_bus_lock(dev);
@ -1831,7 +1833,7 @@ static struct device **create_namespace_io(struct nd_region *nd_region)
return devs;
}
static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
static bool has_uuid_at_pos(struct nd_region *nd_region, const uuid_t *uuid,
u64 cookie, u16 pos)
{
struct nd_namespace_label *found = NULL;
@ -1856,7 +1858,7 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
if (!nsl_validate_isetcookie(ndd, nd_label, cookie))
continue;
if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
if (!nsl_uuid_equal(ndd, nd_label, uuid))
continue;
if (!nsl_validate_type_guid(ndd, nd_label,
@ -1881,7 +1883,7 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
return found != NULL;
}
static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
static int select_pmem_id(struct nd_region *nd_region, const uuid_t *pmem_id)
{
int i;
@ -1900,7 +1902,7 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
nd_label = label_ent->label;
if (!nd_label)
continue;
if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0)
if (nsl_uuid_equal(ndd, nd_label, pmem_id))
break;
nd_label = NULL;
}
@ -1923,7 +1925,8 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
/* pass */;
else {
dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n",
dev_name(ndd->dev), nd_label->uuid);
dev_name(ndd->dev),
nsl_uuid_raw(ndd, nd_label));
return -EINVAL;
}
@ -1953,6 +1956,7 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
resource_size_t size = 0;
struct resource *res;
struct device *dev;
uuid_t uuid;
int rc = 0;
u16 i;
@ -1963,12 +1967,12 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) {
dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
nd_label->uuid);
nsl_uuid_raw(ndd, nd_label));
if (!nsl_validate_isetcookie(ndd, nd_label, altcookie))
return ERR_PTR(-EAGAIN);
dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n",
nd_label->uuid);
nsl_uuid_raw(ndd, nd_label));
}
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
@ -1984,9 +1988,12 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
res->flags = IORESOURCE_MEM;
for (i = 0; i < nd_region->ndr_mappings; i++) {
if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i))
uuid_t uuid;
nsl_get_uuid(ndd, nd_label, &uuid);
if (has_uuid_at_pos(nd_region, &uuid, cookie, i))
continue;
if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i))
if (has_uuid_at_pos(nd_region, &uuid, altcookie, i))
continue;
break;
}
@ -2000,7 +2007,7 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
* find a dimm with two instances of the same uuid.
*/
dev_err(&nd_region->dev, "%s missing label for %pUb\n",
nvdimm_name(nvdimm), nd_label->uuid);
nvdimm_name(nvdimm), nsl_uuid_raw(ndd, nd_label));
rc = -EINVAL;
goto err;
}
@ -2013,7 +2020,8 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
* the dimm being enabled (i.e. nd_label_reserve_dpa()
* succeeded).
*/
rc = select_pmem_id(nd_region, nd_label->uuid);
nsl_get_uuid(ndd, nd_label, &uuid);
rc = select_pmem_id(nd_region, &uuid);
if (rc)
goto err;
@ -2039,8 +2047,8 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
WARN_ON(nspm->alt_name || nspm->uuid);
nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0),
NSLABEL_NAME_LEN, GFP_KERNEL);
nspm->uuid = kmemdup((void __force *) label0->uuid,
NSLABEL_UUID_LEN, GFP_KERNEL);
nsl_get_uuid(ndd, label0, &uuid);
nspm->uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL);
nspm->lbasize = nsl_get_lbasize(ndd, label0);
nspm->nsio.common.claim_class =
nsl_get_claim_class(ndd, label0);
@ -2217,15 +2225,15 @@ static int add_namespace_resource(struct nd_region *nd_region,
int i;
for (i = 0; i < count; i++) {
u8 *uuid = namespace_to_uuid(devs[i]);
uuid_t *uuid = namespace_to_uuid(devs[i]);
struct resource *res;
if (IS_ERR_OR_NULL(uuid)) {
if (IS_ERR(uuid)) {
WARN_ON(1);
continue;
}
if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0)
if (!nsl_uuid_equal(ndd, nd_label, uuid))
continue;
if (is_namespace_blk(devs[i])) {
res = nsblk_add_resource(nd_region, ndd,
@ -2237,7 +2245,7 @@ static int add_namespace_resource(struct nd_region *nd_region,
} else {
dev_err(&nd_region->dev,
"error: conflicting extents for uuid: %pUb\n",
nd_label->uuid);
uuid);
return -ENXIO;
}
break;
@ -2257,6 +2265,7 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
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);
@ -2271,7 +2280,8 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
dev->parent = &nd_region->dev;
nsblk->id = -1;
nsblk->lbasize = nsl_get_lbasize(ndd, nd_label);
nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, GFP_KERNEL);
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;

5
drivers/nvdimm/nd-core.h
View File

@ -126,8 +126,9 @@ void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
void nd_synchronize(void);
void __nd_device_register(struct device *dev);
struct nd_label_id;
char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags);
bool nd_is_uuid_unique(struct device *dev, u8 *uuid);
char *nd_label_gen_id(struct nd_label_id *label_id, const uuid_t *uuid,
u32 flags);
bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid);
struct nd_region;
struct nvdimm_drvdata;
struct nd_mapping;

40
drivers/nvdimm/nd.h
View File

@ -177,6 +177,38 @@ static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
nd_label->lbasize = __cpu_to_le64(lbasize);
}
static inline const uuid_t *nsl_get_uuid(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
uuid_t *uuid)
{
import_uuid(uuid, nd_label->uuid);
return uuid;
}
static inline const uuid_t *nsl_set_uuid(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
const uuid_t *uuid)
{
export_uuid(nd_label->uuid, uuid);
return uuid;
}
static inline bool nsl_uuid_equal(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
const uuid_t *uuid)
{
uuid_t tmp;
import_uuid(&tmp, nd_label->uuid);
return uuid_equal(&tmp, uuid);
}
static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label)
{
return nd_label->uuid;
}
bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
u64 isetcookie);
@ -335,7 +367,7 @@ struct nd_btt {
struct btt *btt;
unsigned long lbasize;
u64 size;
u8 *uuid;
uuid_t *uuid;
int id;
int initial_offset;
u16 version_major;
@ -350,7 +382,7 @@ enum nd_pfn_mode {
struct nd_pfn {
int id;
u8 *uuid;
uuid_t *uuid;
struct device dev;
unsigned long align;
unsigned long npfns;
@ -378,7 +410,7 @@ void wait_nvdimm_bus_probe_idle(struct device *dev);
void nd_device_register(struct device *dev);
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
void nd_device_notify(struct device *dev, enum nvdimm_event event);
int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
int nd_uuid_store(struct device *dev, uuid_t **uuid_out, const char *buf,
size_t len);
ssize_t nd_size_select_show(unsigned long current_size,
const unsigned long *supported, char *buf);
@ -561,6 +593,6 @@ 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 u8 *nd_dev_to_uuid(struct device *dev);
const uuid_t *nd_dev_to_uuid(struct device *dev);
bool pmem_should_map_pages(struct device *dev);
#endif /* __ND_H__ */

2
drivers/nvdimm/pfn_devs.c
View File

@ -452,7 +452,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
unsigned long align, start_pad;
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
struct nd_namespace_common *ndns = nd_pfn->ndns;
const u8 *parent_uuid = nd_dev_to_uuid(&ndns->dev);
const uuid_t *parent_uuid = nd_dev_to_uuid(&ndns->dev);
if (!pfn_sb || !ndns)
return -ENODEV;

4
include/linux/nd.h
View File

@ -88,7 +88,7 @@ struct nd_namespace_pmem {
struct nd_namespace_io nsio;
unsigned long lbasize;
char *alt_name;
u8 *uuid;
uuid_t *uuid;
int id;
};
@ -105,7 +105,7 @@ struct nd_namespace_pmem {
struct nd_namespace_blk {
struct nd_namespace_common common;
char *alt_name;
u8 *uuid;
uuid_t *uuid;
int id;
unsigned long lbasize;
resource_size_t size;