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Diffstat (limited to 'drivers/nvdimm/label.c')
-rw-r--r--drivers/nvdimm/label.c251
1 files changed, 224 insertions, 27 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index dd615345699f..87796f840777 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -12,6 +12,7 @@
*/
#include <linux/device.h>
#include <linux/ndctl.h>
+#include <linux/uuid.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/nd.h>
@@ -19,6 +20,11 @@
#include "label.h"
#include "nd.h"
+static guid_t nvdimm_btt_guid;
+static guid_t nvdimm_btt2_guid;
+static guid_t nvdimm_pfn_guid;
+static guid_t nvdimm_dax_guid;
+
static u32 best_seq(u32 a, u32 b)
{
a &= NSINDEX_SEQ_MASK;
@@ -34,6 +40,11 @@ static u32 best_seq(u32 a, u32 b)
return a;
}
+unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd)
+{
+ return ndd->nslabel_size;
+}
+
size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
{
u32 index_span;
@@ -49,7 +60,7 @@ size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
* starts to waste space at larger config_sizes, but it's
* unlikely we'll ever see anything but 128K.
*/
- index_span = ndd->nsarea.config_size / 129;
+ index_span = ndd->nsarea.config_size / (sizeof_namespace_label(ndd) + 1);
index_span /= NSINDEX_ALIGN * 2;
ndd->nsindex_size = index_span * NSINDEX_ALIGN;
@@ -58,10 +69,10 @@ size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd)
{
- return ndd->nsarea.config_size / 129;
+ return ndd->nsarea.config_size / (sizeof_namespace_label(ndd) + 1);
}
-int nd_label_validate(struct nvdimm_drvdata *ndd)
+static int __nd_label_validate(struct nvdimm_drvdata *ndd)
{
/*
* On media label format consists of two index blocks followed
@@ -104,6 +115,7 @@ int nd_label_validate(struct nvdimm_drvdata *ndd)
u32 nslot;
u8 sig[NSINDEX_SIG_LEN];
u64 sum_save, sum, size;
+ unsigned int version, labelsize;
memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN);
if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) {
@@ -111,6 +123,21 @@ int nd_label_validate(struct nvdimm_drvdata *ndd)
__func__, i);
continue;
}
+
+ /* label sizes larger than 128 arrived with v1.2 */
+ version = __le16_to_cpu(nsindex[i]->major) * 100
+ + __le16_to_cpu(nsindex[i]->minor);
+ if (version >= 102)
+ labelsize = 1 << (7 + nsindex[i]->labelsize);
+ else
+ labelsize = 128;
+
+ if (labelsize != sizeof_namespace_label(ndd)) {
+ dev_dbg(dev, "%s: nsindex%d labelsize %d invalid\n",
+ __func__, i, nsindex[i]->labelsize);
+ continue;
+ }
+
sum_save = __le64_to_cpu(nsindex[i]->checksum);
nsindex[i]->checksum = __cpu_to_le64(0);
sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1);
@@ -153,7 +180,7 @@ int nd_label_validate(struct nvdimm_drvdata *ndd)
}
nslot = __le32_to_cpu(nsindex[i]->nslot);
- if (nslot * sizeof(struct nd_namespace_label)
+ if (nslot * sizeof_namespace_label(ndd)
+ 2 * sizeof_namespace_index(ndd)
> ndd->nsarea.config_size) {
dev_dbg(dev, "%s: nsindex%d nslot: %u invalid, config_size: %#x\n",
@@ -189,6 +216,29 @@ int nd_label_validate(struct nvdimm_drvdata *ndd)
return -1;
}
+int nd_label_validate(struct nvdimm_drvdata *ndd)
+{
+ /*
+ * In order to probe for and validate namespace index blocks we
+ * need to know the size of the labels, and we can't trust the
+ * size of the labels until we validate the index blocks.
+ * Resolve this dependency loop by probing for known label
+ * sizes, but default to v1.2 256-byte namespace labels if
+ * discovery fails.
+ */
+ int label_size[] = { 128, 256 };
+ int i, rc;
+
+ for (i = 0; i < ARRAY_SIZE(label_size); i++) {
+ ndd->nslabel_size = label_size[i];
+ rc = __nd_label_validate(ndd);
+ if (rc >= 0)
+ return rc;
+ }
+
+ return -1;
+}
+
void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
struct nd_namespace_index *src)
{
@@ -210,7 +260,22 @@ static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd)
static int to_slot(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label)
{
- return nd_label - nd_label_base(ndd);
+ unsigned long label, base;
+
+ label = (unsigned long) nd_label;
+ base = (unsigned long) nd_label_base(ndd);
+
+ return (label - base) / sizeof_namespace_label(ndd);
+}
+
+static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot)
+{
+ unsigned long label, base;
+
+ base = (unsigned long) nd_label_base(ndd);
+ label = base + sizeof_namespace_label(ndd) * slot;
+
+ return (struct nd_namespace_label *) label;
}
#define for_each_clear_bit_le(bit, addr, size) \
@@ -268,7 +333,8 @@ static bool preamble_next(struct nvdimm_drvdata *ndd,
free, nslot);
}
-static bool slot_valid(struct nd_namespace_label *nd_label, u32 slot)
+static bool slot_valid(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label, u32 slot)
{
/* check that we are written where we expect to be written */
if (slot != __le32_to_cpu(nd_label->slot))
@@ -279,6 +345,21 @@ static bool slot_valid(struct nd_namespace_label *nd_label, u32 slot)
| __le64_to_cpu(nd_label->rawsize)) % SZ_4K)
return false;
+ /* check checksum */
+ if (namespace_label_has(ndd, checksum)) {
+ u64 sum, sum_save;
+
+ sum_save = __le64_to_cpu(nd_label->checksum);
+ nd_label->checksum = __cpu_to_le64(0);
+ sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1);
+ nd_label->checksum = __cpu_to_le64(sum_save);
+ if (sum != sum_save) {
+ dev_dbg(ndd->dev, "%s fail checksum. slot: %d expect: %#llx\n",
+ __func__, slot, sum);
+ return false;
+ }
+ }
+
return true;
}
@@ -299,9 +380,9 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
struct resource *res;
u32 flags;
- nd_label = nd_label_base(ndd) + slot;
+ nd_label = to_label(ndd, slot);
- if (!slot_valid(nd_label, slot))
+ if (!slot_valid(ndd, nd_label, slot))
continue;
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
@@ -331,9 +412,9 @@ int nd_label_active_count(struct nvdimm_drvdata *ndd)
for_each_clear_bit_le(slot, free, nslot) {
struct nd_namespace_label *nd_label;
- nd_label = nd_label_base(ndd) + slot;
+ nd_label = to_label(ndd, slot);
- if (!slot_valid(nd_label, slot)) {
+ if (!slot_valid(ndd, nd_label, slot)) {
u32 label_slot = __le32_to_cpu(nd_label->slot);
u64 size = __le64_to_cpu(nd_label->rawsize);
u64 dpa = __le64_to_cpu(nd_label->dpa);
@@ -360,12 +441,12 @@ struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n)
for_each_clear_bit_le(slot, free, nslot) {
struct nd_namespace_label *nd_label;
- nd_label = nd_label_base(ndd) + slot;
- if (!slot_valid(nd_label, slot))
+ nd_label = to_label(ndd, slot);
+ if (!slot_valid(ndd, nd_label, slot))
continue;
if (n-- == 0)
- return nd_label_base(ndd) + slot;
+ return to_label(ndd, slot);
}
return NULL;
@@ -437,7 +518,8 @@ static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq,
nslot = __le32_to_cpu(nsindex->nslot);
memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN);
- nsindex->flags = __cpu_to_le32(0);
+ memset(&nsindex->flags, 0, 3);
+ nsindex->labelsize = sizeof_namespace_label(ndd) >> 8;
nsindex->seq = __cpu_to_le32(seq);
offset = (unsigned long) nsindex
- (unsigned long) to_namespace_index(ndd, 0);
@@ -452,7 +534,10 @@ static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq,
nsindex->labeloff = __cpu_to_le64(offset);
nsindex->nslot = __cpu_to_le32(nslot);
nsindex->major = __cpu_to_le16(1);
- nsindex->minor = __cpu_to_le16(1);
+ if (sizeof_namespace_label(ndd) < 256)
+ nsindex->minor = __cpu_to_le16(1);
+ else
+ nsindex->minor = __cpu_to_le16(2);
nsindex->checksum = __cpu_to_le64(0);
if (flags & ND_NSINDEX_INIT) {
unsigned long *free = (unsigned long *) nsindex->free;
@@ -490,11 +575,49 @@ static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd,
- (unsigned long) to_namespace_index(ndd, 0);
}
+enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid)
+{
+ if (guid_equal(guid, &nvdimm_btt_guid))
+ return NVDIMM_CCLASS_BTT;
+ else if (guid_equal(guid, &nvdimm_btt2_guid))
+ return NVDIMM_CCLASS_BTT2;
+ else if (guid_equal(guid, &nvdimm_pfn_guid))
+ return NVDIMM_CCLASS_PFN;
+ else if (guid_equal(guid, &nvdimm_dax_guid))
+ return NVDIMM_CCLASS_DAX;
+ else if (guid_equal(guid, &guid_null))
+ return NVDIMM_CCLASS_NONE;
+
+ return NVDIMM_CCLASS_UNKNOWN;
+}
+
+static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class,
+ guid_t *target)
+{
+ if (claim_class == NVDIMM_CCLASS_BTT)
+ return &nvdimm_btt_guid;
+ else if (claim_class == NVDIMM_CCLASS_BTT2)
+ return &nvdimm_btt2_guid;
+ else if (claim_class == NVDIMM_CCLASS_PFN)
+ return &nvdimm_pfn_guid;
+ else if (claim_class == NVDIMM_CCLASS_DAX)
+ return &nvdimm_dax_guid;
+ else if (claim_class == NVDIMM_CCLASS_UNKNOWN) {
+ /*
+ * If we're modifying a namespace for which we don't
+ * know the claim_class, don't touch the existing guid.
+ */
+ return target;
+ } else
+ return &guid_null;
+}
+
static int __pmem_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
int pos)
{
- u64 cookie = nd_region_interleave_set_cookie(nd_region);
+ struct nd_namespace_common *ndns = &nspm->nsio.common;
+ struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_ent *label_ent, *victim = NULL;
struct nd_namespace_label *nd_label;
@@ -504,11 +627,13 @@ static int __pmem_label_update(struct nd_region *nd_region,
unsigned long *free;
u32 nslot, slot;
size_t offset;
+ u64 cookie;
int rc;
if (!preamble_next(ndd, &nsindex, &free, &nslot))
return -ENXIO;
+ cookie = nd_region_interleave_set_cookie(nd_region, nsindex);
nd_label_gen_id(&label_id, nspm->uuid, 0);
for_each_dpa_resource(ndd, res)
if (strcmp(res->name, label_id.id) == 0)
@@ -525,8 +650,8 @@ static int __pmem_label_update(struct nd_region *nd_region,
return -ENXIO;
dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot);
- nd_label = nd_label_base(ndd) + slot;
- memset(nd_label, 0, sizeof(struct nd_namespace_label));
+ 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);
@@ -535,14 +660,28 @@ static int __pmem_label_update(struct nd_region *nd_region,
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);
+ if (namespace_label_has(ndd, type_guid))
+ guid_copy(&nd_label->type_guid, &nd_set->type_guid);
+ if (namespace_label_has(ndd, abstraction_guid))
+ guid_copy(&nd_label->abstraction_guid,
+ to_abstraction_guid(ndns->claim_class,
+ &nd_label->abstraction_guid));
+ if (namespace_label_has(ndd, checksum)) {
+ u64 sum;
+
+ nd_label->checksum = __cpu_to_le64(0);
+ sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1);
+ nd_label->checksum = __cpu_to_le64(sum);
+ }
nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__);
/* update label */
offset = nd_label_offset(ndd, nd_label);
rc = nvdimm_set_config_data(ndd, offset, nd_label,
- sizeof(struct nd_namespace_label));
+ sizeof_namespace_label(ndd));
if (rc < 0)
return rc;
@@ -624,6 +763,8 @@ static int __blk_label_update(struct nd_region *nd_region,
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;
@@ -632,6 +773,7 @@ static int __blk_label_update(struct nd_region *nd_region,
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;
@@ -668,7 +810,7 @@ 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 = nd_label_base(ndd) + slot;
+ nd_label = to_label(ndd, slot);
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
continue;
@@ -703,6 +845,18 @@ static int __blk_label_update(struct nd_region *nd_region,
}
}
+ /*
+ * 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;
@@ -714,25 +868,58 @@ static int __blk_label_update(struct nd_region *nd_region,
goto abort;
dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot);
- nd_label = nd_label_base(ndd) + slot;
- memset(nd_label, 0, sizeof(struct nd_namespace_label));
+ 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);
- 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 */
+
+ /*
+ * Use the presence of the type_guid as a flag to
+ * determine isetcookie usage and nlabel + position
+ * policy for blk-aperture namespaces.
+ */
+ 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);
+ } else {
+ nd_label->nlabel = __cpu_to_le16(0xffff);
+ nd_label->position = __cpu_to_le16(0xffff);
+ }
+ nd_label->isetcookie = __cpu_to_le64(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 */
+ }
+
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);
+ if (namespace_label_has(ndd, type_guid))
+ guid_copy(&nd_label->type_guid, &nd_set->type_guid);
+ if (namespace_label_has(ndd, abstraction_guid))
+ guid_copy(&nd_label->abstraction_guid,
+ to_abstraction_guid(ndns->claim_class,
+ &nd_label->abstraction_guid));
+
+ if (namespace_label_has(ndd, checksum)) {
+ u64 sum;
+
+ nd_label->checksum = __cpu_to_le64(0);
+ sum = nd_fletcher64(nd_label,
+ sizeof_namespace_label(ndd), 1);
+ nd_label->checksum = __cpu_to_le64(sum);
+ }
/* update label */
offset = nd_label_offset(ndd, nd_label);
rc = nvdimm_set_config_data(ndd, offset, nd_label,
- sizeof(struct nd_namespace_label));
+ sizeof_namespace_label(ndd));
if (rc < 0)
goto abort;
}
@@ -790,7 +977,7 @@ static int __blk_label_update(struct nd_region *nd_region,
goto out;
}
for_each_clear_bit_le(slot, free, nslot) {
- nd_label = nd_label_base(ndd) + slot;
+ nd_label = to_label(ndd, slot);
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
continue;
@@ -973,3 +1160,13 @@ int nd_blk_namespace_label_update(struct nd_region *nd_region,
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));
+ WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid));
+ WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid));
+ WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid));
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 21:56:21 +0000