![Dan Williams](/assets/img/avatar_default.png)
Similar to BLK regions, publish new seed namespace devices to allow unused PMEM region capacity to be consumed by additional namespaces. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2355 lines
58 KiB
C
2355 lines
58 KiB
C
/*
|
|
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/sort.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pmem.h>
|
|
#include <linux/list.h>
|
|
#include <linux/nd.h>
|
|
#include "nd-core.h"
|
|
#include "nd.h"
|
|
|
|
static void namespace_io_release(struct device *dev)
|
|
{
|
|
struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
|
|
|
kfree(nsio);
|
|
}
|
|
|
|
static void namespace_pmem_release(struct device *dev)
|
|
{
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
|
|
if (nspm->id >= 0)
|
|
ida_simple_remove(&nd_region->ns_ida, nspm->id);
|
|
kfree(nspm->alt_name);
|
|
kfree(nspm->uuid);
|
|
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 struct device_type namespace_io_device_type = {
|
|
.name = "nd_namespace_io",
|
|
.release = namespace_io_release,
|
|
};
|
|
|
|
static struct device_type namespace_pmem_device_type = {
|
|
.name = "nd_namespace_pmem",
|
|
.release = namespace_pmem_release,
|
|
};
|
|
|
|
static struct device_type namespace_blk_device_type = {
|
|
.name = "nd_namespace_blk",
|
|
.release = namespace_blk_release,
|
|
};
|
|
|
|
static bool is_namespace_pmem(const struct device *dev)
|
|
{
|
|
return dev ? dev->type == &namespace_pmem_device_type : false;
|
|
}
|
|
|
|
static bool is_namespace_blk(const struct device *dev)
|
|
{
|
|
return dev ? dev->type == &namespace_blk_device_type : false;
|
|
}
|
|
|
|
static bool is_namespace_io(const struct device *dev)
|
|
{
|
|
return dev ? dev->type == &namespace_io_device_type : false;
|
|
}
|
|
|
|
static int is_uuid_busy(struct device *dev, void *data)
|
|
{
|
|
u8 *uuid1 = data, *uuid2 = NULL;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
uuid2 = nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
uuid2 = nsblk->uuid;
|
|
} else if (is_nd_btt(dev)) {
|
|
struct nd_btt *nd_btt = to_nd_btt(dev);
|
|
|
|
uuid2 = nd_btt->uuid;
|
|
} else if (is_nd_pfn(dev)) {
|
|
struct nd_pfn *nd_pfn = to_nd_pfn(dev);
|
|
|
|
uuid2 = nd_pfn->uuid;
|
|
}
|
|
|
|
if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0)
|
|
return -EBUSY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_namespace_uuid_busy(struct device *dev, void *data)
|
|
{
|
|
if (is_nd_pmem(dev) || is_nd_blk(dev))
|
|
return device_for_each_child(dev, data, is_uuid_busy);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nd_is_uuid_unique - verify that no other namespace has @uuid
|
|
* @dev: any device on a nvdimm_bus
|
|
* @uuid: uuid to check
|
|
*/
|
|
bool nd_is_uuid_unique(struct device *dev, u8 *uuid)
|
|
{
|
|
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
|
|
|
|
if (!nvdimm_bus)
|
|
return false;
|
|
WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev));
|
|
if (device_for_each_child(&nvdimm_bus->dev, uuid,
|
|
is_namespace_uuid_busy) != 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool pmem_should_map_pages(struct device *dev)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
struct nd_namespace_io *nsio;
|
|
|
|
if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
|
|
return false;
|
|
|
|
if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags))
|
|
return false;
|
|
|
|
if (is_nd_pfn(dev) || is_nd_btt(dev))
|
|
return false;
|
|
|
|
nsio = to_nd_namespace_io(dev);
|
|
if (region_intersects(nsio->res.start, resource_size(&nsio->res),
|
|
IORESOURCE_SYSTEM_RAM,
|
|
IORES_DESC_NONE) == REGION_MIXED)
|
|
return false;
|
|
|
|
#ifdef ARCH_MEMREMAP_PMEM
|
|
return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(pmem_should_map_pages);
|
|
|
|
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
|
|
char *name)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
|
|
const char *suffix = NULL;
|
|
|
|
if (ndns->claim && is_nd_btt(ndns->claim))
|
|
suffix = "s";
|
|
|
|
if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) {
|
|
int nsidx = 0;
|
|
|
|
if (is_namespace_pmem(&ndns->dev)) {
|
|
struct nd_namespace_pmem *nspm;
|
|
|
|
nspm = to_nd_namespace_pmem(&ndns->dev);
|
|
nsidx = nspm->id;
|
|
}
|
|
|
|
if (nsidx)
|
|
sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx,
|
|
suffix ? suffix : "");
|
|
else
|
|
sprintf(name, "pmem%d%s", nd_region->id,
|
|
suffix ? suffix : "");
|
|
} else if (is_namespace_blk(&ndns->dev)) {
|
|
struct nd_namespace_blk *nsblk;
|
|
|
|
nsblk = to_nd_namespace_blk(&ndns->dev);
|
|
sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id,
|
|
suffix ? suffix : "");
|
|
} else {
|
|
return NULL;
|
|
}
|
|
|
|
return name;
|
|
}
|
|
EXPORT_SYMBOL(nvdimm_namespace_disk_name);
|
|
|
|
const u8 *nd_dev_to_uuid(struct device *dev)
|
|
{
|
|
static const u8 null_uuid[16];
|
|
|
|
if (!dev)
|
|
return null_uuid;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
return nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
return nsblk->uuid;
|
|
} else
|
|
return null_uuid;
|
|
}
|
|
EXPORT_SYMBOL(nd_dev_to_uuid);
|
|
|
|
static ssize_t nstype_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
|
|
return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region));
|
|
}
|
|
static DEVICE_ATTR_RO(nstype);
|
|
|
|
static ssize_t __alt_name_store(struct device *dev, const char *buf,
|
|
const size_t len)
|
|
{
|
|
char *input, *pos, *alt_name, **ns_altname;
|
|
ssize_t rc;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
ns_altname = &nspm->alt_name;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
ns_altname = &nsblk->alt_name;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
if (dev->driver || to_ndns(dev)->claim)
|
|
return -EBUSY;
|
|
|
|
input = kmemdup(buf, len + 1, GFP_KERNEL);
|
|
if (!input)
|
|
return -ENOMEM;
|
|
|
|
input[len] = '\0';
|
|
pos = strim(input);
|
|
if (strlen(pos) + 1 > NSLABEL_NAME_LEN) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL);
|
|
if (!alt_name) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
kfree(*ns_altname);
|
|
*ns_altname = alt_name;
|
|
sprintf(*ns_altname, "%s", pos);
|
|
rc = len;
|
|
|
|
out:
|
|
kfree(input);
|
|
return rc;
|
|
}
|
|
|
|
static resource_size_t nd_namespace_blk_size(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;
|
|
resource_size_t size = 0;
|
|
struct resource *res;
|
|
|
|
if (!nsblk->uuid)
|
|
return 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)
|
|
size += resource_size(res);
|
|
return size;
|
|
}
|
|
|
|
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)
|
|
{
|
|
dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim,
|
|
"namespace must be idle during label update\n");
|
|
if (dev->driver || to_ndns(dev)->claim)
|
|
return 0;
|
|
|
|
/*
|
|
* Only allow label writes that will result in a valid namespace
|
|
* or deletion of an existing namespace.
|
|
*/
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
resource_size_t size = resource_size(&nspm->nsio.res);
|
|
|
|
if (size == 0 && nspm->uuid)
|
|
/* delete allocation */;
|
|
else if (!nspm->uuid)
|
|
return 0;
|
|
|
|
return nd_pmem_namespace_label_update(nd_region, nspm, size);
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
resource_size_t size = nd_namespace_blk_size(nsblk);
|
|
|
|
if (size == 0 && nsblk->uuid)
|
|
/* delete allocation */;
|
|
else if (!nsblk->uuid || !nsblk->lbasize)
|
|
return 0;
|
|
|
|
return nd_blk_namespace_label_update(nd_region, nsblk, size);
|
|
} else
|
|
return -ENXIO;
|
|
}
|
|
|
|
static ssize_t alt_name_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
ssize_t rc;
|
|
|
|
device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
wait_nvdimm_bus_probe_idle(dev);
|
|
rc = __alt_name_store(dev, buf, len);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc);
|
|
nvdimm_bus_unlock(dev);
|
|
device_unlock(dev);
|
|
|
|
return rc < 0 ? rc : len;
|
|
}
|
|
|
|
static ssize_t alt_name_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
char *ns_altname;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
ns_altname = nspm->alt_name;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
ns_altname = nsblk->alt_name;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
return sprintf(buf, "%s\n", ns_altname ? ns_altname : "");
|
|
}
|
|
static DEVICE_ATTR_RW(alt_name);
|
|
|
|
static int scan_free(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
|
|
resource_size_t n)
|
|
{
|
|
bool is_blk = strncmp(label_id->id, "blk", 3) == 0;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
int rc = 0;
|
|
|
|
while (n) {
|
|
struct resource *res, *last;
|
|
resource_size_t new_start;
|
|
|
|
last = NULL;
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(res->name, label_id->id) == 0)
|
|
last = res;
|
|
res = last;
|
|
if (!res)
|
|
return 0;
|
|
|
|
if (n >= resource_size(res)) {
|
|
n -= resource_size(res);
|
|
nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc);
|
|
nvdimm_free_dpa(ndd, res);
|
|
/* retry with last resource deleted */
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Keep BLK allocations relegated to high DPA as much as
|
|
* possible
|
|
*/
|
|
if (is_blk)
|
|
new_start = res->start + n;
|
|
else
|
|
new_start = res->start;
|
|
|
|
rc = adjust_resource(res, new_start, resource_size(res) - n);
|
|
if (rc == 0)
|
|
res->flags |= DPA_RESOURCE_ADJUSTED;
|
|
nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc);
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* shrink_dpa_allocation - for each dimm in region free n bytes for label_id
|
|
* @nd_region: the set of dimms to reclaim @n bytes from
|
|
* @label_id: unique identifier for the namespace consuming this dpa range
|
|
* @n: number of bytes per-dimm to release
|
|
*
|
|
* Assumes resources are ordered. Starting from the end try to
|
|
* adjust_resource() the allocation to @n, but if @n is larger than the
|
|
* allocation delete it and find the 'new' last allocation in the label
|
|
* set.
|
|
*/
|
|
static int shrink_dpa_allocation(struct nd_region *nd_region,
|
|
struct nd_label_id *label_id, resource_size_t n)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
int rc;
|
|
|
|
rc = scan_free(nd_region, nd_mapping, label_id, n);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
|
|
struct nd_region *nd_region, struct nd_mapping *nd_mapping,
|
|
resource_size_t n)
|
|
{
|
|
bool is_blk = strncmp(label_id->id, "blk", 3) == 0;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
resource_size_t first_dpa;
|
|
struct resource *res;
|
|
int rc = 0;
|
|
|
|
/* allocate blk from highest dpa first */
|
|
if (is_blk)
|
|
first_dpa = nd_mapping->start + nd_mapping->size - n;
|
|
else
|
|
first_dpa = nd_mapping->start;
|
|
|
|
/* first resource allocation for this label-id or dimm */
|
|
res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n);
|
|
if (!res)
|
|
rc = -EBUSY;
|
|
|
|
nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc);
|
|
return rc ? n : 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* space_valid() - validate free dpa space against constraints
|
|
* @nd_region: hosting region of the free space
|
|
* @ndd: dimm device data for debug
|
|
* @label_id: namespace id to allocate space
|
|
* @prev: potential allocation that precedes free space
|
|
* @next: allocation that follows the given free space range
|
|
* @exist: first allocation with same id in the mapping
|
|
* @n: range that must satisfied for pmem allocations
|
|
* @valid: free space range to validate
|
|
*
|
|
* BLK-space is valid as long as it does not precede a PMEM
|
|
* allocation in a given region. PMEM-space must be contiguous
|
|
* and adjacent to an existing existing allocation (if one
|
|
* exists). If reserving PMEM any space is valid.
|
|
*/
|
|
static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd,
|
|
struct nd_label_id *label_id, struct resource *prev,
|
|
struct resource *next, struct resource *exist,
|
|
resource_size_t n, struct resource *valid)
|
|
{
|
|
bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
|
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
|
|
|
|
if (valid->start >= valid->end)
|
|
goto invalid;
|
|
|
|
if (is_reserve)
|
|
return;
|
|
|
|
if (!is_pmem) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
|
struct nvdimm_bus *nvdimm_bus;
|
|
struct blk_alloc_info info = {
|
|
.nd_mapping = nd_mapping,
|
|
.available = nd_mapping->size,
|
|
.res = valid,
|
|
};
|
|
|
|
WARN_ON(!is_nd_blk(&nd_region->dev));
|
|
nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
|
|
device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy);
|
|
return;
|
|
}
|
|
|
|
/* allocation needs to be contiguous, so this is all or nothing */
|
|
if (resource_size(valid) < n)
|
|
goto invalid;
|
|
|
|
/* we've got all the space we need and no existing allocation */
|
|
if (!exist)
|
|
return;
|
|
|
|
/* allocation needs to be contiguous with the existing namespace */
|
|
if (valid->start == exist->end + 1
|
|
|| valid->end == exist->start - 1)
|
|
return;
|
|
|
|
invalid:
|
|
/* truncate @valid size to 0 */
|
|
valid->end = valid->start - 1;
|
|
}
|
|
|
|
enum alloc_loc {
|
|
ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER,
|
|
};
|
|
|
|
static resource_size_t scan_allocate(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
|
|
resource_size_t n)
|
|
{
|
|
resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
|
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res, *exist = NULL, valid;
|
|
const resource_size_t to_allocate = n;
|
|
int first;
|
|
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(label_id->id, res->name) == 0)
|
|
exist = res;
|
|
|
|
valid.start = nd_mapping->start;
|
|
valid.end = mapping_end;
|
|
valid.name = "free space";
|
|
retry:
|
|
first = 0;
|
|
for_each_dpa_resource(ndd, res) {
|
|
struct resource *next = res->sibling, *new_res = NULL;
|
|
resource_size_t allocate, available = 0;
|
|
enum alloc_loc loc = ALLOC_ERR;
|
|
const char *action;
|
|
int rc = 0;
|
|
|
|
/* ignore resources outside this nd_mapping */
|
|
if (res->start > mapping_end)
|
|
continue;
|
|
if (res->end < nd_mapping->start)
|
|
continue;
|
|
|
|
/* space at the beginning of the mapping */
|
|
if (!first++ && res->start > nd_mapping->start) {
|
|
valid.start = nd_mapping->start;
|
|
valid.end = res->start - 1;
|
|
space_valid(nd_region, ndd, label_id, NULL, next, exist,
|
|
to_allocate, &valid);
|
|
available = resource_size(&valid);
|
|
if (available)
|
|
loc = ALLOC_BEFORE;
|
|
}
|
|
|
|
/* space between allocations */
|
|
if (!loc && next) {
|
|
valid.start = res->start + resource_size(res);
|
|
valid.end = min(mapping_end, next->start - 1);
|
|
space_valid(nd_region, ndd, label_id, res, next, exist,
|
|
to_allocate, &valid);
|
|
available = resource_size(&valid);
|
|
if (available)
|
|
loc = ALLOC_MID;
|
|
}
|
|
|
|
/* space at the end of the mapping */
|
|
if (!loc && !next) {
|
|
valid.start = res->start + resource_size(res);
|
|
valid.end = mapping_end;
|
|
space_valid(nd_region, ndd, label_id, res, next, exist,
|
|
to_allocate, &valid);
|
|
available = resource_size(&valid);
|
|
if (available)
|
|
loc = ALLOC_AFTER;
|
|
}
|
|
|
|
if (!loc || !available)
|
|
continue;
|
|
allocate = min(available, n);
|
|
switch (loc) {
|
|
case ALLOC_BEFORE:
|
|
if (strcmp(res->name, label_id->id) == 0) {
|
|
/* adjust current resource up */
|
|
rc = adjust_resource(res, res->start - allocate,
|
|
resource_size(res) + allocate);
|
|
action = "cur grow up";
|
|
} else
|
|
action = "allocate";
|
|
break;
|
|
case ALLOC_MID:
|
|
if (strcmp(next->name, label_id->id) == 0) {
|
|
/* adjust next resource up */
|
|
rc = adjust_resource(next, next->start
|
|
- allocate, resource_size(next)
|
|
+ allocate);
|
|
new_res = next;
|
|
action = "next grow up";
|
|
} else if (strcmp(res->name, label_id->id) == 0) {
|
|
action = "grow down";
|
|
} else
|
|
action = "allocate";
|
|
break;
|
|
case ALLOC_AFTER:
|
|
if (strcmp(res->name, label_id->id) == 0)
|
|
action = "grow down";
|
|
else
|
|
action = "allocate";
|
|
break;
|
|
default:
|
|
return n;
|
|
}
|
|
|
|
if (strcmp(action, "allocate") == 0) {
|
|
/* BLK allocate bottom up */
|
|
if (!is_pmem)
|
|
valid.start += available - allocate;
|
|
|
|
new_res = nvdimm_allocate_dpa(ndd, label_id,
|
|
valid.start, allocate);
|
|
if (!new_res)
|
|
rc = -EBUSY;
|
|
} else if (strcmp(action, "grow down") == 0) {
|
|
/* adjust current resource down */
|
|
rc = adjust_resource(res, res->start, resource_size(res)
|
|
+ allocate);
|
|
if (rc == 0)
|
|
res->flags |= DPA_RESOURCE_ADJUSTED;
|
|
}
|
|
|
|
if (!new_res)
|
|
new_res = res;
|
|
|
|
nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n",
|
|
action, loc, rc);
|
|
|
|
if (rc)
|
|
return n;
|
|
|
|
n -= allocate;
|
|
if (n) {
|
|
/*
|
|
* Retry scan with newly inserted resources.
|
|
* For example, if we did an ALLOC_BEFORE
|
|
* insertion there may also have been space
|
|
* available for an ALLOC_AFTER insertion, so we
|
|
* need to check this same resource again
|
|
*/
|
|
goto retry;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If we allocated nothing in the BLK case it may be because we are in
|
|
* an initial "pmem-reserve pass". Only do an initial BLK allocation
|
|
* when none of the DPA space is reserved.
|
|
*/
|
|
if ((is_pmem || !ndd->dpa.child) && n == to_allocate)
|
|
return init_dpa_allocation(label_id, nd_region, nd_mapping, n);
|
|
return n;
|
|
}
|
|
|
|
static int merge_dpa(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping, struct nd_label_id *label_id)
|
|
{
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res;
|
|
|
|
if (strncmp("pmem", label_id->id, 4) == 0)
|
|
return 0;
|
|
retry:
|
|
for_each_dpa_resource(ndd, res) {
|
|
int rc;
|
|
struct resource *next = res->sibling;
|
|
resource_size_t end = res->start + resource_size(res);
|
|
|
|
if (!next || strcmp(res->name, label_id->id) != 0
|
|
|| strcmp(next->name, label_id->id) != 0
|
|
|| end != next->start)
|
|
continue;
|
|
end += resource_size(next);
|
|
nvdimm_free_dpa(ndd, next);
|
|
rc = adjust_resource(res, res->start, end - res->start);
|
|
nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc);
|
|
if (rc)
|
|
return rc;
|
|
res->flags |= DPA_RESOURCE_ADJUSTED;
|
|
goto retry;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __reserve_free_pmem(struct device *dev, void *data)
|
|
{
|
|
struct nvdimm *nvdimm = data;
|
|
struct nd_region *nd_region;
|
|
struct nd_label_id label_id;
|
|
int i;
|
|
|
|
if (!is_nd_pmem(dev))
|
|
return 0;
|
|
|
|
nd_region = to_nd_region(dev);
|
|
if (nd_region->ndr_mappings == 0)
|
|
return 0;
|
|
|
|
memset(&label_id, 0, sizeof(label_id));
|
|
strcat(label_id.id, "pmem-reserve");
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
resource_size_t n, rem = 0;
|
|
|
|
if (nd_mapping->nvdimm != nvdimm)
|
|
continue;
|
|
|
|
n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem);
|
|
if (n == 0)
|
|
return 0;
|
|
rem = scan_allocate(nd_region, nd_mapping, &label_id, n);
|
|
dev_WARN_ONCE(&nd_region->dev, rem,
|
|
"pmem reserve underrun: %#llx of %#llx bytes\n",
|
|
(unsigned long long) n - rem,
|
|
(unsigned long long) n);
|
|
return rem ? -ENXIO : 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
|
|
struct nd_mapping *nd_mapping)
|
|
{
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res, *_res;
|
|
|
|
for_each_dpa_resource_safe(ndd, res, _res)
|
|
if (strcmp(res->name, "pmem-reserve") == 0)
|
|
nvdimm_free_dpa(ndd, res);
|
|
}
|
|
|
|
static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus,
|
|
struct nd_mapping *nd_mapping)
|
|
{
|
|
struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
|
int rc;
|
|
|
|
rc = device_for_each_child(&nvdimm_bus->dev, nvdimm,
|
|
__reserve_free_pmem);
|
|
if (rc)
|
|
release_free_pmem(nvdimm_bus, nd_mapping);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* grow_dpa_allocation - for each dimm allocate n bytes for @label_id
|
|
* @nd_region: the set of dimms to allocate @n more bytes from
|
|
* @label_id: unique identifier for the namespace consuming this dpa range
|
|
* @n: number of bytes per-dimm to add to the existing allocation
|
|
*
|
|
* Assumes resources are ordered. For BLK regions, first consume
|
|
* BLK-only available DPA free space, then consume PMEM-aliased DPA
|
|
* space starting at the highest DPA. For PMEM regions start
|
|
* allocations from the start of an interleave set and end at the first
|
|
* BLK allocation or the end of the interleave set, whichever comes
|
|
* first.
|
|
*/
|
|
static int grow_dpa_allocation(struct nd_region *nd_region,
|
|
struct nd_label_id *label_id, resource_size_t n)
|
|
{
|
|
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
|
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
|
|
int i;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
resource_size_t rem = n;
|
|
int rc, j;
|
|
|
|
/*
|
|
* In the BLK case try once with all unallocated PMEM
|
|
* reserved, and once without
|
|
*/
|
|
for (j = is_pmem; j < 2; j++) {
|
|
bool blk_only = j == 0;
|
|
|
|
if (blk_only) {
|
|
rc = reserve_free_pmem(nvdimm_bus, nd_mapping);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
rem = scan_allocate(nd_region, nd_mapping,
|
|
label_id, rem);
|
|
if (blk_only)
|
|
release_free_pmem(nvdimm_bus, nd_mapping);
|
|
|
|
/* try again and allow encroachments into PMEM */
|
|
if (rem == 0)
|
|
break;
|
|
}
|
|
|
|
dev_WARN_ONCE(&nd_region->dev, rem,
|
|
"allocation underrun: %#llx of %#llx bytes\n",
|
|
(unsigned long long) n - rem,
|
|
(unsigned long long) n);
|
|
if (rem)
|
|
return -ENXIO;
|
|
|
|
rc = merge_dpa(nd_region, nd_mapping, label_id);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
|
|
struct nd_namespace_pmem *nspm, resource_size_t size)
|
|
{
|
|
struct resource *res = &nspm->nsio.res;
|
|
resource_size_t offset = 0;
|
|
|
|
if (size && !nspm->uuid) {
|
|
WARN_ON_ONCE(1);
|
|
size = 0;
|
|
}
|
|
|
|
if (size && nspm->uuid) {
|
|
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;
|
|
|
|
if (!ndd) {
|
|
size = 0;
|
|
goto out;
|
|
}
|
|
|
|
nd_label_gen_id(&label_id, nspm->uuid, 0);
|
|
|
|
/* calculate a spa offset from the dpa allocation offset */
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(res->name, label_id.id) == 0) {
|
|
offset = (res->start - nd_mapping->start)
|
|
* nd_region->ndr_mappings;
|
|
goto out;
|
|
}
|
|
|
|
WARN_ON_ONCE(1);
|
|
size = 0;
|
|
}
|
|
|
|
out:
|
|
res->start = nd_region->ndr_start + offset;
|
|
res->end = res->start + size - 1;
|
|
}
|
|
|
|
static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)
|
|
{
|
|
if (!uuid) {
|
|
dev_dbg(dev, "%s: uuid not set\n", where);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static ssize_t __size_store(struct device *dev, unsigned long long val)
|
|
{
|
|
resource_size_t allocated = 0, available = 0;
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
struct nd_mapping *nd_mapping;
|
|
struct nvdimm_drvdata *ndd;
|
|
struct nd_label_id label_id;
|
|
u32 flags = 0, remainder;
|
|
u8 *uuid = NULL;
|
|
int rc, i;
|
|
|
|
if (dev->driver || to_ndns(dev)->claim)
|
|
return -EBUSY;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
uuid = nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
uuid = nsblk->uuid;
|
|
flags = NSLABEL_FLAG_LOCAL;
|
|
}
|
|
|
|
/*
|
|
* We need a uuid for the allocation-label and dimm(s) on which
|
|
* to store the label.
|
|
*/
|
|
if (uuid_not_set(uuid, dev, __func__))
|
|
return -ENXIO;
|
|
if (nd_region->ndr_mappings == 0) {
|
|
dev_dbg(dev, "%s: not associated with dimm(s)\n", __func__);
|
|
return -ENXIO;
|
|
}
|
|
|
|
div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder);
|
|
if (remainder) {
|
|
dev_dbg(dev, "%llu is not %dK aligned\n", val,
|
|
(SZ_4K * nd_region->ndr_mappings) / SZ_1K);
|
|
return -EINVAL;
|
|
}
|
|
|
|
nd_label_gen_id(&label_id, uuid, flags);
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
nd_mapping = &nd_region->mapping[i];
|
|
ndd = to_ndd(nd_mapping);
|
|
|
|
/*
|
|
* All dimms in an interleave set, or the base dimm for a blk
|
|
* region, need to be enabled for the size to be changed.
|
|
*/
|
|
if (!ndd)
|
|
return -ENXIO;
|
|
|
|
allocated += nvdimm_allocated_dpa(ndd, &label_id);
|
|
}
|
|
available = nd_region_available_dpa(nd_region);
|
|
|
|
if (val > available + allocated)
|
|
return -ENOSPC;
|
|
|
|
if (val == allocated)
|
|
return 0;
|
|
|
|
val = div_u64(val, nd_region->ndr_mappings);
|
|
allocated = div_u64(allocated, nd_region->ndr_mappings);
|
|
if (val < allocated)
|
|
rc = shrink_dpa_allocation(nd_region, &label_id,
|
|
allocated - val);
|
|
else
|
|
rc = grow_dpa_allocation(nd_region, &label_id, val - allocated);
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
nd_namespace_pmem_set_resource(nd_region, nspm,
|
|
val * nd_region->ndr_mappings);
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
/*
|
|
* Try to delete the namespace if we deleted all of its
|
|
* allocation, this is not the seed device for the
|
|
* region, and it is not actively claimed by a btt
|
|
* instance.
|
|
*/
|
|
if (val == 0 && nd_region->ns_seed != dev
|
|
&& !nsblk->common.claim)
|
|
nd_device_unregister(dev, ND_ASYNC);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t size_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
unsigned long long val;
|
|
u8 **uuid = NULL;
|
|
int rc;
|
|
|
|
rc = kstrtoull(buf, 0, &val);
|
|
if (rc)
|
|
return rc;
|
|
|
|
device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
wait_nvdimm_bus_probe_idle(dev);
|
|
rc = __size_store(dev, val);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
uuid = &nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
uuid = &nsblk->uuid;
|
|
}
|
|
|
|
if (rc == 0 && val == 0 && uuid) {
|
|
/* setting size zero == 'delete namespace' */
|
|
kfree(*uuid);
|
|
*uuid = NULL;
|
|
}
|
|
|
|
dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0
|
|
? "fail" : "success", rc);
|
|
|
|
nvdimm_bus_unlock(dev);
|
|
device_unlock(dev);
|
|
|
|
return rc < 0 ? rc : len;
|
|
}
|
|
|
|
resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
|
|
{
|
|
struct device *dev = &ndns->dev;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
return resource_size(&nspm->nsio.res);
|
|
} else if (is_namespace_blk(dev)) {
|
|
return nd_namespace_blk_size(to_nd_namespace_blk(dev));
|
|
} else if (is_namespace_io(dev)) {
|
|
struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
|
|
|
return resource_size(&nsio->res);
|
|
} else
|
|
WARN_ONCE(1, "unknown namespace type\n");
|
|
return 0;
|
|
}
|
|
|
|
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
|
|
{
|
|
resource_size_t size;
|
|
|
|
nvdimm_bus_lock(&ndns->dev);
|
|
size = __nvdimm_namespace_capacity(ndns);
|
|
nvdimm_bus_unlock(&ndns->dev);
|
|
|
|
return size;
|
|
}
|
|
EXPORT_SYMBOL(nvdimm_namespace_capacity);
|
|
|
|
static ssize_t size_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%llu\n", (unsigned long long)
|
|
nvdimm_namespace_capacity(to_ndns(dev)));
|
|
}
|
|
static DEVICE_ATTR(size, S_IRUGO, size_show, size_store);
|
|
|
|
static u8 *namespace_to_uuid(struct device *dev)
|
|
{
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
return nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
return nsblk->uuid;
|
|
} else
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static ssize_t uuid_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
u8 *uuid = namespace_to_uuid(dev);
|
|
|
|
if (IS_ERR(uuid))
|
|
return PTR_ERR(uuid);
|
|
if (uuid)
|
|
return sprintf(buf, "%pUb\n", uuid);
|
|
return sprintf(buf, "\n");
|
|
}
|
|
|
|
/**
|
|
* namespace_update_uuid - check for a unique uuid and whether we're "renaming"
|
|
* @nd_region: parent region so we can updates all dimms in the set
|
|
* @dev: namespace type for generating label_id
|
|
* @new_uuid: incoming uuid
|
|
* @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)
|
|
{
|
|
u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0;
|
|
struct nd_label_id old_label_id;
|
|
struct nd_label_id new_label_id;
|
|
int i;
|
|
|
|
if (!nd_is_uuid_unique(dev, new_uuid))
|
|
return -EINVAL;
|
|
|
|
if (*old_uuid == NULL)
|
|
goto out;
|
|
|
|
/*
|
|
* If we've already written a label with this uuid, then it's
|
|
* too late to rename because we can't reliably update the uuid
|
|
* without losing the old namespace. Userspace must delete this
|
|
* namespace to abandon the old uuid.
|
|
*/
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
|
|
/*
|
|
* This check by itself is sufficient because old_uuid
|
|
* would be NULL above if this uuid did not exist in the
|
|
* currently written set.
|
|
*
|
|
* FIXME: can we delete uuid with zero dpa allocated?
|
|
*/
|
|
if (list_empty(&nd_mapping->labels))
|
|
return -EBUSY;
|
|
}
|
|
|
|
nd_label_gen_id(&old_label_id, *old_uuid, flags);
|
|
nd_label_gen_id(&new_label_id, new_uuid, flags);
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res;
|
|
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(res->name, old_label_id.id) == 0)
|
|
sprintf((void *) res->name, "%s",
|
|
new_label_id.id);
|
|
}
|
|
kfree(*old_uuid);
|
|
out:
|
|
*old_uuid = new_uuid;
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
ssize_t rc = 0;
|
|
u8 **ns_uuid;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
ns_uuid = &nspm->uuid;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
ns_uuid = &nsblk->uuid;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
wait_nvdimm_bus_probe_idle(dev);
|
|
if (to_ndns(dev)->claim)
|
|
rc = -EBUSY;
|
|
if (rc >= 0)
|
|
rc = nd_uuid_store(dev, &uuid, buf, len);
|
|
if (rc >= 0)
|
|
rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
else
|
|
kfree(uuid);
|
|
dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
|
|
rc, buf, buf[len - 1] == '\n' ? "" : "\n");
|
|
nvdimm_bus_unlock(dev);
|
|
device_unlock(dev);
|
|
|
|
return rc < 0 ? rc : len;
|
|
}
|
|
static DEVICE_ATTR_RW(uuid);
|
|
|
|
static ssize_t resource_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct resource *res;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
res = &nspm->nsio.res;
|
|
} else if (is_namespace_io(dev)) {
|
|
struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
|
|
|
|
res = &nsio->res;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
/* no address to convey if the namespace has no allocation */
|
|
if (resource_size(res) == 0)
|
|
return -ENXIO;
|
|
return sprintf(buf, "%#llx\n", (unsigned long long) res->start);
|
|
}
|
|
static DEVICE_ATTR_RO(resource);
|
|
|
|
static const unsigned long ns_lbasize_supported[] = { 512, 520, 528,
|
|
4096, 4104, 4160, 4224, 0 };
|
|
|
|
static ssize_t sector_size_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
if (!is_namespace_blk(dev))
|
|
return -ENXIO;
|
|
|
|
return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf);
|
|
}
|
|
|
|
static ssize_t sector_size_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
ssize_t rc = 0;
|
|
|
|
if (!is_namespace_blk(dev))
|
|
return -ENXIO;
|
|
|
|
device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
if (to_ndns(dev)->claim)
|
|
rc = -EBUSY;
|
|
if (rc >= 0)
|
|
rc = nd_sector_size_store(dev, buf, &nsblk->lbasize,
|
|
ns_lbasize_supported);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__,
|
|
rc, rc < 0 ? "tried" : "wrote", buf,
|
|
buf[len - 1] == '\n' ? "" : "\n");
|
|
nvdimm_bus_unlock(dev);
|
|
device_unlock(dev);
|
|
|
|
return rc ? rc : len;
|
|
}
|
|
static DEVICE_ATTR_RW(sector_size);
|
|
|
|
static ssize_t dpa_extents_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
struct nd_label_id label_id;
|
|
int count = 0, i;
|
|
u8 *uuid = NULL;
|
|
u32 flags = 0;
|
|
|
|
nvdimm_bus_lock(dev);
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
uuid = nspm->uuid;
|
|
flags = 0;
|
|
} else if (is_namespace_blk(dev)) {
|
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
|
|
|
uuid = nsblk->uuid;
|
|
flags = NSLABEL_FLAG_LOCAL;
|
|
}
|
|
|
|
if (!uuid)
|
|
goto out;
|
|
|
|
nd_label_gen_id(&label_id, uuid, flags);
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct resource *res;
|
|
|
|
for_each_dpa_resource(ndd, res)
|
|
if (strcmp(res->name, label_id.id) == 0)
|
|
count++;
|
|
}
|
|
out:
|
|
nvdimm_bus_unlock(dev);
|
|
|
|
return sprintf(buf, "%d\n", count);
|
|
}
|
|
static DEVICE_ATTR_RO(dpa_extents);
|
|
|
|
static ssize_t holder_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_namespace_common *ndns = to_ndns(dev);
|
|
ssize_t rc;
|
|
|
|
device_lock(dev);
|
|
rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : "");
|
|
device_unlock(dev);
|
|
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR_RO(holder);
|
|
|
|
static ssize_t mode_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_namespace_common *ndns = to_ndns(dev);
|
|
struct device *claim;
|
|
char *mode;
|
|
ssize_t rc;
|
|
|
|
device_lock(dev);
|
|
claim = ndns->claim;
|
|
if (claim && is_nd_btt(claim))
|
|
mode = "safe";
|
|
else if (claim && is_nd_pfn(claim))
|
|
mode = "memory";
|
|
else if (claim && is_nd_dax(claim))
|
|
mode = "dax";
|
|
else if (!claim && pmem_should_map_pages(dev))
|
|
mode = "memory";
|
|
else
|
|
mode = "raw";
|
|
rc = sprintf(buf, "%s\n", mode);
|
|
device_unlock(dev);
|
|
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR_RO(mode);
|
|
|
|
static ssize_t force_raw_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
bool force_raw;
|
|
int rc = strtobool(buf, &force_raw);
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
to_ndns(dev)->force_raw = force_raw;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t force_raw_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", to_ndns(dev)->force_raw);
|
|
}
|
|
static DEVICE_ATTR_RW(force_raw);
|
|
|
|
static struct attribute *nd_namespace_attributes[] = {
|
|
&dev_attr_nstype.attr,
|
|
&dev_attr_size.attr,
|
|
&dev_attr_mode.attr,
|
|
&dev_attr_uuid.attr,
|
|
&dev_attr_holder.attr,
|
|
&dev_attr_resource.attr,
|
|
&dev_attr_alt_name.attr,
|
|
&dev_attr_force_raw.attr,
|
|
&dev_attr_sector_size.attr,
|
|
&dev_attr_dpa_extents.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t namespace_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
|
|
if (a == &dev_attr_resource.attr) {
|
|
if (is_namespace_blk(dev))
|
|
return 0;
|
|
return a->mode;
|
|
}
|
|
|
|
if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {
|
|
if (a == &dev_attr_size.attr)
|
|
return S_IWUSR | S_IRUGO;
|
|
|
|
if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr)
|
|
return 0;
|
|
|
|
return a->mode;
|
|
}
|
|
|
|
if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr
|
|
|| a == &dev_attr_holder.attr
|
|
|| a == &dev_attr_force_raw.attr
|
|
|| a == &dev_attr_mode.attr)
|
|
return a->mode;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct attribute_group nd_namespace_attribute_group = {
|
|
.attrs = nd_namespace_attributes,
|
|
.is_visible = namespace_visible,
|
|
};
|
|
|
|
static const struct attribute_group *nd_namespace_attribute_groups[] = {
|
|
&nd_device_attribute_group,
|
|
&nd_namespace_attribute_group,
|
|
&nd_numa_attribute_group,
|
|
NULL,
|
|
};
|
|
|
|
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
|
|
{
|
|
struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
|
|
struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
|
|
struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL;
|
|
struct nd_namespace_common *ndns = NULL;
|
|
resource_size_t size;
|
|
|
|
if (nd_btt || nd_pfn || nd_dax) {
|
|
if (nd_btt)
|
|
ndns = nd_btt->ndns;
|
|
else if (nd_pfn)
|
|
ndns = nd_pfn->ndns;
|
|
else if (nd_dax)
|
|
ndns = nd_dax->nd_pfn.ndns;
|
|
|
|
if (!ndns)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
/*
|
|
* Flush any in-progess probes / removals in the driver
|
|
* for the raw personality of this namespace.
|
|
*/
|
|
device_lock(&ndns->dev);
|
|
device_unlock(&ndns->dev);
|
|
if (ndns->dev.driver) {
|
|
dev_dbg(&ndns->dev, "is active, can't bind %s\n",
|
|
dev_name(dev));
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev,
|
|
"host (%s) vs claim (%s) mismatch\n",
|
|
dev_name(dev),
|
|
dev_name(ndns->claim)))
|
|
return ERR_PTR(-ENXIO);
|
|
} else {
|
|
ndns = to_ndns(dev);
|
|
if (ndns->claim) {
|
|
dev_dbg(dev, "claimed by %s, failing probe\n",
|
|
dev_name(ndns->claim));
|
|
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
}
|
|
|
|
size = nvdimm_namespace_capacity(ndns);
|
|
if (size < ND_MIN_NAMESPACE_SIZE) {
|
|
dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n",
|
|
&size, ND_MIN_NAMESPACE_SIZE);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
if (is_namespace_pmem(&ndns->dev)) {
|
|
struct nd_namespace_pmem *nspm;
|
|
|
|
nspm = to_nd_namespace_pmem(&ndns->dev);
|
|
if (uuid_not_set(nspm->uuid, &ndns->dev, __func__))
|
|
return ERR_PTR(-ENODEV);
|
|
} else if (is_namespace_blk(&ndns->dev)) {
|
|
struct nd_namespace_blk *nsblk;
|
|
|
|
nsblk = to_nd_namespace_blk(&ndns->dev);
|
|
if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__))
|
|
return ERR_PTR(-ENODEV);
|
|
if (!nsblk->lbasize) {
|
|
dev_dbg(&ndns->dev, "%s: sector size not set\n",
|
|
__func__);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
if (!nd_namespace_blk_validate(nsblk))
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
return ndns;
|
|
}
|
|
EXPORT_SYMBOL(nvdimm_namespace_common_probe);
|
|
|
|
static struct device **create_namespace_io(struct nd_region *nd_region)
|
|
{
|
|
struct nd_namespace_io *nsio;
|
|
struct device *dev, **devs;
|
|
struct resource *res;
|
|
|
|
nsio = kzalloc(sizeof(*nsio), GFP_KERNEL);
|
|
if (!nsio)
|
|
return NULL;
|
|
|
|
devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL);
|
|
if (!devs) {
|
|
kfree(nsio);
|
|
return NULL;
|
|
}
|
|
|
|
dev = &nsio->common.dev;
|
|
dev->type = &namespace_io_device_type;
|
|
dev->parent = &nd_region->dev;
|
|
res = &nsio->res;
|
|
res->name = dev_name(&nd_region->dev);
|
|
res->flags = IORESOURCE_MEM;
|
|
res->start = nd_region->ndr_start;
|
|
res->end = res->start + nd_region->ndr_size - 1;
|
|
|
|
devs[0] = dev;
|
|
return devs;
|
|
}
|
|
|
|
static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
|
|
u64 cookie, u16 pos)
|
|
{
|
|
struct nd_namespace_label *found = NULL;
|
|
int i;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nd_label_ent *label_ent;
|
|
bool found_uuid = false;
|
|
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
|
struct nd_namespace_label *nd_label = label_ent->label;
|
|
u16 position, nlabel;
|
|
u64 isetcookie;
|
|
|
|
if (!nd_label)
|
|
continue;
|
|
isetcookie = __le64_to_cpu(nd_label->isetcookie);
|
|
position = __le16_to_cpu(nd_label->position);
|
|
nlabel = __le16_to_cpu(nd_label->nlabel);
|
|
|
|
if (isetcookie != cookie)
|
|
continue;
|
|
|
|
if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
|
|
if (found_uuid) {
|
|
dev_dbg(to_ndd(nd_mapping)->dev,
|
|
"%s duplicate entry for uuid\n",
|
|
__func__);
|
|
return false;
|
|
}
|
|
found_uuid = true;
|
|
if (nlabel != nd_region->ndr_mappings)
|
|
continue;
|
|
if (position != pos)
|
|
continue;
|
|
found = nd_label;
|
|
break;
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
return found != NULL;
|
|
}
|
|
|
|
static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
|
|
{
|
|
int i;
|
|
|
|
if (!pmem_id)
|
|
return -ENODEV;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_namespace_label *nd_label = NULL;
|
|
u64 hw_start, hw_end, pmem_start, pmem_end;
|
|
struct nd_label_ent *label_ent;
|
|
|
|
WARN_ON(!mutex_is_locked(&nd_mapping->lock));
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
|
nd_label = label_ent->label;
|
|
if (!nd_label)
|
|
continue;
|
|
if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0)
|
|
break;
|
|
nd_label = NULL;
|
|
}
|
|
|
|
if (!nd_label) {
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Check that this label is compliant with the dpa
|
|
* range published in NFIT
|
|
*/
|
|
hw_start = nd_mapping->start;
|
|
hw_end = hw_start + nd_mapping->size;
|
|
pmem_start = __le64_to_cpu(nd_label->dpa);
|
|
pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize);
|
|
if (pmem_start >= hw_start && pmem_start < hw_end
|
|
&& pmem_end <= hw_end && pmem_end > hw_start)
|
|
/* pass */;
|
|
else {
|
|
dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n",
|
|
dev_name(ndd->dev), nd_label->uuid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* move recently validated label to the front of the list */
|
|
list_move(&label_ent->list, &nd_mapping->labels);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* create_namespace_pmem - validate interleave set labelling, retrieve label0
|
|
* @nd_region: region with mappings to validate
|
|
* @nspm: target namespace to create
|
|
* @nd_label: target pmem namespace label to evaluate
|
|
*/
|
|
struct device *create_namespace_pmem(struct nd_region *nd_region,
|
|
struct nd_namespace_label *nd_label)
|
|
{
|
|
u64 cookie = nd_region_interleave_set_cookie(nd_region);
|
|
struct nd_label_ent *label_ent;
|
|
struct nd_namespace_pmem *nspm;
|
|
struct nd_mapping *nd_mapping;
|
|
resource_size_t size = 0;
|
|
struct resource *res;
|
|
struct device *dev;
|
|
int rc = 0;
|
|
u16 i;
|
|
|
|
if (cookie == 0) {
|
|
dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
if (__le64_to_cpu(nd_label->isetcookie) != cookie) {
|
|
dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
|
|
nd_label->uuid);
|
|
return ERR_PTR(-EAGAIN);
|
|
}
|
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
|
|
if (!nspm)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
nspm->id = -1;
|
|
dev = &nspm->nsio.common.dev;
|
|
dev->type = &namespace_pmem_device_type;
|
|
dev->parent = &nd_region->dev;
|
|
res = &nspm->nsio.res;
|
|
res->name = dev_name(&nd_region->dev);
|
|
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))
|
|
break;
|
|
if (i < nd_region->ndr_mappings) {
|
|
struct nvdimm_drvdata *ndd = to_ndd(&nd_region->mapping[i]);
|
|
|
|
/*
|
|
* Give up if we don't find an instance of a uuid at each
|
|
* position (from 0 to nd_region->ndr_mappings - 1), or if we
|
|
* find a dimm with two instances of the same uuid.
|
|
*/
|
|
dev_err(&nd_region->dev, "%s missing label for %pUb\n",
|
|
dev_name(ndd->dev), nd_label->uuid);
|
|
rc = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Fix up each mapping's 'labels' to have the validated pmem label for
|
|
* that position at labels[0], and NULL at labels[1]. In the process,
|
|
* check that the namespace aligns with interleave-set. We know
|
|
* that it does not overlap with any blk namespaces by virtue of
|
|
* the dimm being enabled (i.e. nd_label_reserve_dpa()
|
|
* succeeded).
|
|
*/
|
|
rc = select_pmem_id(nd_region, nd_label->uuid);
|
|
if (rc)
|
|
goto err;
|
|
|
|
/* Calculate total size and populate namespace properties from label0 */
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_namespace_label *label0;
|
|
|
|
nd_mapping = &nd_region->mapping[i];
|
|
label_ent = list_first_entry_or_null(&nd_mapping->labels,
|
|
typeof(*label_ent), list);
|
|
label0 = label_ent ? label_ent->label : 0;
|
|
|
|
if (!label0) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
size += __le64_to_cpu(label0->rawsize);
|
|
if (__le16_to_cpu(label0->position) != 0)
|
|
continue;
|
|
WARN_ON(nspm->alt_name || nspm->uuid);
|
|
nspm->alt_name = kmemdup((void __force *) label0->name,
|
|
NSLABEL_NAME_LEN, GFP_KERNEL);
|
|
nspm->uuid = kmemdup((void __force *) label0->uuid,
|
|
NSLABEL_UUID_LEN, GFP_KERNEL);
|
|
}
|
|
|
|
if (!nspm->alt_name || !nspm->uuid) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
nd_namespace_pmem_set_resource(nd_region, nspm, size);
|
|
|
|
return dev;
|
|
err:
|
|
namespace_pmem_release(dev);
|
|
switch (rc) {
|
|
case -EINVAL:
|
|
dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__);
|
|
break;
|
|
case -ENODEV:
|
|
dev_dbg(&nd_region->dev, "%s: label not found\n", __func__);
|
|
break;
|
|
default:
|
|
dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n",
|
|
__func__, rc);
|
|
break;
|
|
}
|
|
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;
|
|
dev->groups = nd_namespace_attribute_groups;
|
|
|
|
return &nsblk->common.dev;
|
|
}
|
|
|
|
static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
|
|
{
|
|
struct nd_namespace_pmem *nspm;
|
|
struct resource *res;
|
|
struct device *dev;
|
|
|
|
if (!is_nd_pmem(&nd_region->dev))
|
|
return NULL;
|
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
|
|
if (!nspm)
|
|
return NULL;
|
|
|
|
dev = &nspm->nsio.common.dev;
|
|
dev->type = &namespace_pmem_device_type;
|
|
dev->parent = &nd_region->dev;
|
|
res = &nspm->nsio.res;
|
|
res->name = dev_name(&nd_region->dev);
|
|
res->flags = IORESOURCE_MEM;
|
|
|
|
nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
|
|
if (nspm->id < 0) {
|
|
kfree(nspm);
|
|
return NULL;
|
|
}
|
|
dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id);
|
|
dev->parent = &nd_region->dev;
|
|
dev->groups = nd_namespace_attribute_groups;
|
|
nd_namespace_pmem_set_resource(nd_region, nspm, 0);
|
|
|
|
return dev;
|
|
}
|
|
|
|
void nd_region_create_ns_seed(struct nd_region *nd_region)
|
|
{
|
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
|
|
|
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);
|
|
|
|
/*
|
|
* Seed creation failures are not fatal, provisioning is simply
|
|
* disabled until memory becomes available
|
|
*/
|
|
if (!nd_region->ns_seed)
|
|
dev_err(&nd_region->dev, "failed to create %s namespace\n",
|
|
is_nd_blk(&nd_region->dev) ? "blk" : "pmem");
|
|
else
|
|
nd_device_register(nd_region->ns_seed);
|
|
}
|
|
|
|
void nd_region_create_dax_seed(struct nd_region *nd_region)
|
|
{
|
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
|
nd_region->dax_seed = nd_dax_create(nd_region);
|
|
/*
|
|
* Seed creation failures are not fatal, provisioning is simply
|
|
* disabled until memory becomes available
|
|
*/
|
|
if (!nd_region->dax_seed)
|
|
dev_err(&nd_region->dev, "failed to create dax namespace\n");
|
|
}
|
|
|
|
void nd_region_create_pfn_seed(struct nd_region *nd_region)
|
|
{
|
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
|
nd_region->pfn_seed = nd_pfn_create(nd_region);
|
|
/*
|
|
* Seed creation failures are not fatal, provisioning is simply
|
|
* disabled until memory becomes available
|
|
*/
|
|
if (!nd_region->pfn_seed)
|
|
dev_err(&nd_region->dev, "failed to create pfn namespace\n");
|
|
}
|
|
|
|
void nd_region_create_btt_seed(struct nd_region *nd_region)
|
|
{
|
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
|
nd_region->btt_seed = nd_btt_create(nd_region);
|
|
/*
|
|
* Seed creation failures are not fatal, provisioning is simply
|
|
* disabled until memory becomes available
|
|
*/
|
|
if (!nd_region->btt_seed)
|
|
dev_err(&nd_region->dev, "failed to create btt namespace\n");
|
|
}
|
|
|
|
static int add_namespace_resource(struct nd_region *nd_region,
|
|
struct nd_namespace_label *nd_label, struct device **devs,
|
|
int count)
|
|
{
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
u8 *uuid = namespace_to_uuid(devs[i]);
|
|
struct resource *res;
|
|
|
|
if (IS_ERR_OR_NULL(uuid)) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0)
|
|
continue;
|
|
if (is_namespace_blk(devs[i])) {
|
|
res = nsblk_add_resource(nd_region, ndd,
|
|
to_nd_namespace_blk(devs[i]),
|
|
__le64_to_cpu(nd_label->dpa));
|
|
if (!res)
|
|
return -ENXIO;
|
|
nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count);
|
|
} else {
|
|
dev_err(&nd_region->dev,
|
|
"error: conflicting extents for uuid: %pUb\n",
|
|
nd_label->uuid);
|
|
return -ENXIO;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
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 nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_namespace_blk *nsblk;
|
|
char *name[NSLABEL_NAME_LEN];
|
|
struct device *dev = NULL;
|
|
struct resource *res;
|
|
|
|
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 = __le64_to_cpu(nd_label->lbasize);
|
|
nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN,
|
|
GFP_KERNEL);
|
|
if (!nsblk->uuid)
|
|
goto blk_err;
|
|
memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
|
|
if (name[0])
|
|
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
|
|
GFP_KERNEL);
|
|
res = nsblk_add_resource(nd_region, ndd, nsblk,
|
|
__le64_to_cpu(nd_label->dpa));
|
|
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;
|
|
const struct device *dev_b = *(const struct device **) b;
|
|
struct nd_namespace_blk *nsblk_a, *nsblk_b;
|
|
struct nd_namespace_pmem *nspm_a, *nspm_b;
|
|
|
|
if (is_namespace_io(dev_a))
|
|
return 0;
|
|
|
|
if (is_namespace_blk(dev_a)) {
|
|
nsblk_a = to_nd_namespace_blk(dev_a);
|
|
nsblk_b = to_nd_namespace_blk(dev_b);
|
|
|
|
return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start,
|
|
sizeof(resource_size_t));
|
|
}
|
|
|
|
nspm_a = to_nd_namespace_pmem(dev_a);
|
|
nspm_b = to_nd_namespace_pmem(dev_b);
|
|
|
|
return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start,
|
|
sizeof(resource_size_t));
|
|
}
|
|
|
|
static struct device **scan_labels(struct nd_region *nd_region)
|
|
{
|
|
int i, count = 0;
|
|
struct device *dev, **devs = NULL;
|
|
struct nd_label_ent *label_ent, *e;
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
|
resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1;
|
|
|
|
/* "safe" because create_namespace_pmem() might list_move() label_ent */
|
|
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
|
|
struct nd_namespace_label *nd_label = label_ent->label;
|
|
struct device **__devs;
|
|
u32 flags;
|
|
|
|
if (!nd_label)
|
|
continue;
|
|
flags = __le32_to_cpu(nd_label->flags);
|
|
if (is_nd_blk(&nd_region->dev)
|
|
== !!(flags & NSLABEL_FLAG_LOCAL))
|
|
/* pass, region matches label type */;
|
|
else
|
|
continue;
|
|
|
|
/* skip labels that describe extents outside of the region */
|
|
if (nd_label->dpa < nd_mapping->start || nd_label->dpa > map_end)
|
|
continue;
|
|
|
|
i = add_namespace_resource(nd_region, nd_label, devs, count);
|
|
if (i < 0)
|
|
goto err;
|
|
if (i < count)
|
|
continue;
|
|
__devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL);
|
|
if (!__devs)
|
|
goto err;
|
|
memcpy(__devs, devs, sizeof(dev) * count);
|
|
kfree(devs);
|
|
devs = __devs;
|
|
|
|
if (is_nd_blk(&nd_region->dev)) {
|
|
dev = create_namespace_blk(nd_region, nd_label, count);
|
|
if (IS_ERR(dev))
|
|
goto err;
|
|
devs[count++] = dev;
|
|
} else {
|
|
dev = create_namespace_pmem(nd_region, nd_label);
|
|
if (IS_ERR(dev)) {
|
|
switch (PTR_ERR(dev)) {
|
|
case -EAGAIN:
|
|
/* skip invalid labels */
|
|
continue;
|
|
case -ENODEV:
|
|
/* fallthrough to seed creation */
|
|
break;
|
|
default:
|
|
goto err;
|
|
}
|
|
} else
|
|
devs[count++] = dev;
|
|
}
|
|
}
|
|
|
|
dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n",
|
|
__func__, count, is_nd_blk(&nd_region->dev)
|
|
? "blk" : "pmem", count == 1 ? "" : "s");
|
|
|
|
if (count == 0) {
|
|
/* 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);
|
|
}
|
|
dev->parent = &nd_region->dev;
|
|
devs[count++] = dev;
|
|
} else if (is_nd_pmem(&nd_region->dev)) {
|
|
/* clean unselected labels */
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct list_head *l, *e;
|
|
LIST_HEAD(list);
|
|
int j;
|
|
|
|
nd_mapping = &nd_region->mapping[i];
|
|
if (list_empty(&nd_mapping->labels)) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
j = count;
|
|
list_for_each_safe(l, e, &nd_mapping->labels) {
|
|
if (!j--)
|
|
break;
|
|
list_move_tail(l, &list);
|
|
}
|
|
nd_mapping_free_labels(nd_mapping);
|
|
list_splice_init(&list, &nd_mapping->labels);
|
|
}
|
|
}
|
|
|
|
if (count > 1)
|
|
sort(devs, count, sizeof(struct device *), cmp_dpa, NULL);
|
|
|
|
return devs;
|
|
|
|
err:
|
|
for (i = 0; devs[i]; i++)
|
|
if (is_nd_blk(&nd_region->dev))
|
|
namespace_blk_release(devs[i]);
|
|
else
|
|
namespace_pmem_release(devs[i]);
|
|
kfree(devs);
|
|
return NULL;
|
|
}
|
|
|
|
static struct device **create_namespaces(struct nd_region *nd_region)
|
|
{
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
|
struct device **devs;
|
|
int i;
|
|
|
|
if (nd_region->ndr_mappings == 0)
|
|
return NULL;
|
|
|
|
/* lock down all mappings while we scan labels */
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
nd_mapping = &nd_region->mapping[i];
|
|
mutex_lock_nested(&nd_mapping->lock, i);
|
|
}
|
|
|
|
devs = scan_labels(nd_region);
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
int reverse = nd_region->ndr_mappings - 1 - i;
|
|
|
|
nd_mapping = &nd_region->mapping[reverse];
|
|
mutex_unlock(&nd_mapping->lock);
|
|
}
|
|
|
|
return devs;
|
|
}
|
|
|
|
static int init_active_labels(struct nd_region *nd_region)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
|
struct nd_label_ent *label_ent;
|
|
int count, j;
|
|
|
|
/*
|
|
* If the dimm is disabled then prevent the region from
|
|
* being activated if it aliases DPA.
|
|
*/
|
|
if (!ndd) {
|
|
if ((nvdimm->flags & NDD_ALIASING) == 0)
|
|
return 0;
|
|
dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n",
|
|
dev_name(&nd_mapping->nvdimm->dev));
|
|
return -ENXIO;
|
|
}
|
|
nd_mapping->ndd = ndd;
|
|
atomic_inc(&nvdimm->busy);
|
|
get_ndd(ndd);
|
|
|
|
count = nd_label_active_count(ndd);
|
|
dev_dbg(ndd->dev, "%s: %d\n", __func__, count);
|
|
if (!count)
|
|
continue;
|
|
for (j = 0; j < count; j++) {
|
|
struct nd_namespace_label *label;
|
|
|
|
label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL);
|
|
if (!label_ent)
|
|
break;
|
|
label = nd_label_active(ndd, j);
|
|
label_ent->label = label;
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
list_add_tail(&label_ent->list, &nd_mapping->labels);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
}
|
|
|
|
if (j >= count)
|
|
continue;
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
nd_mapping_free_labels(nd_mapping);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
|
|
{
|
|
struct device **devs = NULL;
|
|
int i, rc = 0, type;
|
|
|
|
*err = 0;
|
|
nvdimm_bus_lock(&nd_region->dev);
|
|
rc = init_active_labels(nd_region);
|
|
if (rc) {
|
|
nvdimm_bus_unlock(&nd_region->dev);
|
|
return rc;
|
|
}
|
|
|
|
type = nd_region_to_nstype(nd_region);
|
|
switch (type) {
|
|
case ND_DEVICE_NAMESPACE_IO:
|
|
devs = create_namespace_io(nd_region);
|
|
break;
|
|
case ND_DEVICE_NAMESPACE_PMEM:
|
|
case ND_DEVICE_NAMESPACE_BLK:
|
|
devs = create_namespaces(nd_region);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
nvdimm_bus_unlock(&nd_region->dev);
|
|
|
|
if (!devs)
|
|
return -ENODEV;
|
|
|
|
for (i = 0; devs[i]; i++) {
|
|
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) {
|
|
struct nd_namespace_pmem *nspm;
|
|
|
|
nspm = to_nd_namespace_pmem(dev);
|
|
id = ida_simple_get(&nd_region->ns_ida, 0, 0,
|
|
GFP_KERNEL);
|
|
nspm->id = id;
|
|
} else
|
|
id = i;
|
|
|
|
if (id < 0)
|
|
break;
|
|
dev_set_name(dev, "namespace%d.%d", nd_region->id, id);
|
|
dev->groups = nd_namespace_attribute_groups;
|
|
nd_device_register(dev);
|
|
}
|
|
if (i)
|
|
nd_region->ns_seed = devs[0];
|
|
|
|
if (devs[i]) {
|
|
int j;
|
|
|
|
for (j = i; devs[j]; j++) {
|
|
struct device *dev = devs[j];
|
|
|
|
device_initialize(dev);
|
|
put_device(dev);
|
|
}
|
|
*err = j - i;
|
|
/*
|
|
* All of the namespaces we tried to register failed, so
|
|
* fail region activation.
|
|
*/
|
|
if (*err == 0)
|
|
rc = -ENODEV;
|
|
}
|
|
kfree(devs);
|
|
|
|
if (rc == -ENODEV)
|
|
return rc;
|
|
|
|
return i;
|
|
}
|