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3b6c6c0397
Now that the nd_namespace_blk infrastructure is removed, delete all the region machinery to coordinate provisioning aliased capacity between PMEM and BLK. Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/164688418803.2879318.1302315202397235855.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2232 lines
55 KiB
C
2232 lines
55 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/sort.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/nd.h>
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#include "nd-core.h"
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#include "pmem.h"
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#include "pfn.h"
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#include "nd.h"
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static void namespace_io_release(struct device *dev)
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{
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struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
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kfree(nsio);
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}
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static void namespace_pmem_release(struct device *dev)
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{
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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struct nd_region *nd_region = to_nd_region(dev->parent);
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if (nspm->id >= 0)
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ida_simple_remove(&nd_region->ns_ida, nspm->id);
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kfree(nspm->alt_name);
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kfree(nspm->uuid);
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kfree(nspm);
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}
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static bool is_namespace_pmem(const struct device *dev);
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static bool is_namespace_io(const struct device *dev);
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static int is_uuid_busy(struct device *dev, void *data)
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{
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uuid_t *uuid1 = data, *uuid2 = NULL;
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if (is_namespace_pmem(dev)) {
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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uuid2 = nspm->uuid;
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} else if (is_nd_btt(dev)) {
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struct nd_btt *nd_btt = to_nd_btt(dev);
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uuid2 = nd_btt->uuid;
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} else if (is_nd_pfn(dev)) {
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struct nd_pfn *nd_pfn = to_nd_pfn(dev);
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uuid2 = nd_pfn->uuid;
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}
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if (uuid2 && uuid_equal(uuid1, uuid2))
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return -EBUSY;
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return 0;
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}
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static int is_namespace_uuid_busy(struct device *dev, void *data)
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{
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if (is_nd_region(dev))
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return device_for_each_child(dev, data, is_uuid_busy);
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return 0;
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}
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/**
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* nd_is_uuid_unique - verify that no other namespace has @uuid
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* @dev: any device on a nvdimm_bus
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* @uuid: uuid to check
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*/
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bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid)
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{
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struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
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if (!nvdimm_bus)
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return false;
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WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev));
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if (device_for_each_child(&nvdimm_bus->dev, uuid,
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is_namespace_uuid_busy) != 0)
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return false;
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return true;
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}
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bool pmem_should_map_pages(struct device *dev)
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{
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struct nd_region *nd_region = to_nd_region(dev->parent);
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struct nd_namespace_common *ndns = to_ndns(dev);
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struct nd_namespace_io *nsio;
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if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
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return false;
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if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags))
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return false;
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if (is_nd_pfn(dev) || is_nd_btt(dev))
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return false;
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if (ndns->force_raw)
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return false;
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nsio = to_nd_namespace_io(dev);
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if (region_intersects(nsio->res.start, resource_size(&nsio->res),
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IORESOURCE_SYSTEM_RAM,
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IORES_DESC_NONE) == REGION_MIXED)
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return false;
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return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
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}
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EXPORT_SYMBOL(pmem_should_map_pages);
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unsigned int pmem_sector_size(struct nd_namespace_common *ndns)
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{
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if (is_namespace_pmem(&ndns->dev)) {
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struct nd_namespace_pmem *nspm;
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nspm = to_nd_namespace_pmem(&ndns->dev);
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if (nspm->lbasize == 0 || nspm->lbasize == 512)
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/* default */;
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else if (nspm->lbasize == 4096)
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return 4096;
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else
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dev_WARN(&ndns->dev, "unsupported sector size: %ld\n",
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nspm->lbasize);
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}
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/*
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* There is no namespace label (is_namespace_io()), or the label
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* indicates the default sector size.
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*/
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return 512;
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}
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EXPORT_SYMBOL(pmem_sector_size);
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const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
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char *name)
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{
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struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
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const char *suffix = NULL;
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if (ndns->claim && is_nd_btt(ndns->claim))
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suffix = "s";
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if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) {
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int nsidx = 0;
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if (is_namespace_pmem(&ndns->dev)) {
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struct nd_namespace_pmem *nspm;
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nspm = to_nd_namespace_pmem(&ndns->dev);
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nsidx = nspm->id;
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}
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if (nsidx)
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sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx,
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suffix ? suffix : "");
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else
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sprintf(name, "pmem%d%s", nd_region->id,
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suffix ? suffix : "");
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} else {
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return NULL;
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}
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return name;
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}
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EXPORT_SYMBOL(nvdimm_namespace_disk_name);
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const uuid_t *nd_dev_to_uuid(struct device *dev)
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{
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if (!dev)
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return &uuid_null;
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if (is_namespace_pmem(dev)) {
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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return nspm->uuid;
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} else
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return &uuid_null;
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}
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EXPORT_SYMBOL(nd_dev_to_uuid);
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static ssize_t nstype_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct nd_region *nd_region = to_nd_region(dev->parent);
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return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region));
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}
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static DEVICE_ATTR_RO(nstype);
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static ssize_t __alt_name_store(struct device *dev, const char *buf,
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const size_t len)
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{
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char *input, *pos, *alt_name, **ns_altname;
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ssize_t rc;
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if (is_namespace_pmem(dev)) {
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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ns_altname = &nspm->alt_name;
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} else
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return -ENXIO;
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if (dev->driver || to_ndns(dev)->claim)
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return -EBUSY;
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input = kstrndup(buf, len, GFP_KERNEL);
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if (!input)
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return -ENOMEM;
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pos = strim(input);
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if (strlen(pos) + 1 > NSLABEL_NAME_LEN) {
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rc = -EINVAL;
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goto out;
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}
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alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL);
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if (!alt_name) {
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rc = -ENOMEM;
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goto out;
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}
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kfree(*ns_altname);
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*ns_altname = alt_name;
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sprintf(*ns_altname, "%s", pos);
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rc = len;
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out:
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kfree(input);
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return rc;
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}
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static int nd_namespace_label_update(struct nd_region *nd_region,
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struct device *dev)
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{
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dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim,
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"namespace must be idle during label update\n");
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if (dev->driver || to_ndns(dev)->claim)
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return 0;
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/*
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* Only allow label writes that will result in a valid namespace
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* or deletion of an existing namespace.
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*/
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if (is_namespace_pmem(dev)) {
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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resource_size_t size = resource_size(&nspm->nsio.res);
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if (size == 0 && nspm->uuid)
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/* delete allocation */;
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else if (!nspm->uuid)
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return 0;
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return nd_pmem_namespace_label_update(nd_region, nspm, size);
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} else
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return -ENXIO;
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}
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static ssize_t alt_name_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t len)
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{
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struct nd_region *nd_region = to_nd_region(dev->parent);
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ssize_t rc;
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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wait_nvdimm_bus_probe_idle(dev);
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rc = __alt_name_store(dev, buf, len);
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if (rc >= 0)
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rc = nd_namespace_label_update(nd_region, dev);
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dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc);
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nvdimm_bus_unlock(dev);
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nd_device_unlock(dev);
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return rc < 0 ? rc : len;
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}
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static ssize_t alt_name_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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char *ns_altname;
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if (is_namespace_pmem(dev)) {
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
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ns_altname = nspm->alt_name;
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} else
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return -ENXIO;
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return sprintf(buf, "%s\n", ns_altname ? ns_altname : "");
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}
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static DEVICE_ATTR_RW(alt_name);
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static int scan_free(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
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resource_size_t n)
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{
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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int rc = 0;
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while (n) {
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struct resource *res, *last;
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last = NULL;
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for_each_dpa_resource(ndd, res)
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if (strcmp(res->name, label_id->id) == 0)
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last = res;
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res = last;
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if (!res)
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return 0;
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if (n >= resource_size(res)) {
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n -= resource_size(res);
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nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc);
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nvdimm_free_dpa(ndd, res);
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/* retry with last resource deleted */
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continue;
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}
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rc = adjust_resource(res, res->start, resource_size(res) - n);
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if (rc == 0)
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res->flags |= DPA_RESOURCE_ADJUSTED;
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nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc);
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break;
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}
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return rc;
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}
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/**
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* shrink_dpa_allocation - for each dimm in region free n bytes for label_id
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* @nd_region: the set of dimms to reclaim @n bytes from
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* @label_id: unique identifier for the namespace consuming this dpa range
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* @n: number of bytes per-dimm to release
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*
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* Assumes resources are ordered. Starting from the end try to
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* adjust_resource() the allocation to @n, but if @n is larger than the
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* allocation delete it and find the 'new' last allocation in the label
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* set.
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*/
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static int shrink_dpa_allocation(struct nd_region *nd_region,
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struct nd_label_id *label_id, resource_size_t n)
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{
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int i;
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for (i = 0; i < nd_region->ndr_mappings; i++) {
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struct nd_mapping *nd_mapping = &nd_region->mapping[i];
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int rc;
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rc = scan_free(nd_region, nd_mapping, label_id, n);
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if (rc)
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return rc;
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}
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return 0;
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}
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static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
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struct nd_region *nd_region, struct nd_mapping *nd_mapping,
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resource_size_t n)
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{
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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struct resource *res;
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int rc = 0;
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/* first resource allocation for this label-id or dimm */
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res = nvdimm_allocate_dpa(ndd, label_id, nd_mapping->start, n);
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if (!res)
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rc = -EBUSY;
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nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc);
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return rc ? n : 0;
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}
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/**
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* space_valid() - validate free dpa space against constraints
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* @nd_region: hosting region of the free space
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* @ndd: dimm device data for debug
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* @label_id: namespace id to allocate space
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* @prev: potential allocation that precedes free space
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* @next: allocation that follows the given free space range
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* @exist: first allocation with same id in the mapping
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* @n: range that must satisfied for pmem allocations
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* @valid: free space range to validate
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*
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* BLK-space is valid as long as it does not precede a PMEM
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* allocation in a given region. PMEM-space must be contiguous
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* and adjacent to an existing existing allocation (if one
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* exists). If reserving PMEM any space is valid.
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*/
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static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd,
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struct nd_label_id *label_id, struct resource *prev,
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struct resource *next, struct resource *exist,
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resource_size_t n, struct resource *valid)
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{
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bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
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unsigned long align;
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align = nd_region->align / nd_region->ndr_mappings;
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valid->start = ALIGN(valid->start, align);
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valid->end = ALIGN_DOWN(valid->end + 1, align) - 1;
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if (valid->start >= valid->end)
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goto invalid;
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if (is_reserve)
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return;
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/* allocation needs to be contiguous, so this is all or nothing */
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if (resource_size(valid) < n)
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goto invalid;
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/* we've got all the space we need and no existing allocation */
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if (!exist)
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return;
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/* allocation needs to be contiguous with the existing namespace */
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if (valid->start == exist->end + 1
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|| valid->end == exist->start - 1)
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return;
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invalid:
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/* truncate @valid size to 0 */
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valid->end = valid->start - 1;
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}
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enum alloc_loc {
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ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER,
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};
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static resource_size_t scan_allocate(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
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resource_size_t n)
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{
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resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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struct resource *res, *exist = NULL, valid;
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const resource_size_t to_allocate = n;
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int first;
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for_each_dpa_resource(ndd, res)
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if (strcmp(label_id->id, res->name) == 0)
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exist = res;
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valid.start = nd_mapping->start;
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valid.end = mapping_end;
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valid.name = "free space";
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retry:
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first = 0;
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for_each_dpa_resource(ndd, res) {
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struct resource *next = res->sibling, *new_res = NULL;
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resource_size_t allocate, available = 0;
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enum alloc_loc loc = ALLOC_ERR;
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const char *action;
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int rc = 0;
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/* ignore resources outside this nd_mapping */
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if (res->start > mapping_end)
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continue;
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if (res->end < nd_mapping->start)
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continue;
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/* space at the beginning of the mapping */
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if (!first++ && res->start > nd_mapping->start) {
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valid.start = nd_mapping->start;
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valid.end = res->start - 1;
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space_valid(nd_region, ndd, label_id, NULL, next, exist,
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to_allocate, &valid);
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available = resource_size(&valid);
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if (available)
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loc = ALLOC_BEFORE;
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}
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/* space between allocations */
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if (!loc && next) {
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valid.start = res->start + resource_size(res);
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valid.end = min(mapping_end, next->start - 1);
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space_valid(nd_region, ndd, label_id, res, next, exist,
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to_allocate, &valid);
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available = resource_size(&valid);
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if (available)
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loc = ALLOC_MID;
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}
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/* space at the end of the mapping */
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if (!loc && !next) {
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valid.start = res->start + resource_size(res);
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valid.end = mapping_end;
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space_valid(nd_region, ndd, label_id, res, next, exist,
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to_allocate, &valid);
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available = resource_size(&valid);
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if (available)
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loc = ALLOC_AFTER;
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}
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|
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if (!loc || !available)
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continue;
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allocate = min(available, n);
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switch (loc) {
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case ALLOC_BEFORE:
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if (strcmp(res->name, label_id->id) == 0) {
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/* adjust current resource up */
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|
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) {
|
|
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 (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;
|
|
}
|
|
|
|
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_memory(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);
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
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;
|
|
|
|
rem = scan_allocate(nd_region, nd_mapping, label_id, rem);
|
|
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 uuid_t *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_namespace_common *ndns = to_ndns(dev);
|
|
struct nd_mapping *nd_mapping;
|
|
struct nvdimm_drvdata *ndd;
|
|
struct nd_label_id label_id;
|
|
u32 flags = 0, remainder;
|
|
int rc, i, id = -1;
|
|
uuid_t *uuid = NULL;
|
|
|
|
if (dev->driver || ndns->claim)
|
|
return -EBUSY;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
uuid = nspm->uuid;
|
|
id = nspm->id;
|
|
}
|
|
|
|
/*
|
|
* 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, "not associated with dimm(s)\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
div_u64_rem(val, nd_region->align, &remainder);
|
|
if (remainder) {
|
|
dev_dbg(dev, "%llu is not %ldK aligned\n", val,
|
|
nd_region->align / 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, need to be enabled
|
|
* for the size to be changed.
|
|
*/
|
|
if (!ndd)
|
|
return -ENXIO;
|
|
|
|
allocated += nvdimm_allocated_dpa(ndd, &label_id);
|
|
}
|
|
available = nd_region_allocatable_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);
|
|
}
|
|
|
|
/*
|
|
* Try to delete the namespace if we deleted all of its
|
|
* allocation, this is not the seed or 0th device for the
|
|
* region, and it is not actively claimed by a btt, pfn, or dax
|
|
* instance.
|
|
*/
|
|
if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->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;
|
|
uuid_t **uuid = NULL;
|
|
int rc;
|
|
|
|
rc = kstrtoull(buf, 0, &val);
|
|
if (rc)
|
|
return rc;
|
|
|
|
nd_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;
|
|
}
|
|
|
|
if (rc == 0 && val == 0 && uuid) {
|
|
/* setting size zero == 'delete namespace' */
|
|
kfree(*uuid);
|
|
*uuid = NULL;
|
|
}
|
|
|
|
dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
|
|
|
|
nvdimm_bus_unlock(dev);
|
|
nd_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_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);
|
|
|
|
bool nvdimm_namespace_locked(struct nd_namespace_common *ndns)
|
|
{
|
|
int i;
|
|
bool locked = false;
|
|
struct device *dev = &ndns->dev;
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
|
struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
|
|
|
if (test_bit(NDD_LOCKED, &nvdimm->flags)) {
|
|
dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm));
|
|
locked = true;
|
|
}
|
|
}
|
|
return locked;
|
|
}
|
|
EXPORT_SYMBOL(nvdimm_namespace_locked);
|
|
|
|
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, 0444, size_show, size_store);
|
|
|
|
static uuid_t *namespace_to_uuid(struct device *dev)
|
|
{
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
return nspm->uuid;
|
|
}
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
uuid_t *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, uuid_t *new_uuid,
|
|
uuid_t **old_uuid)
|
|
{
|
|
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, 0);
|
|
nd_label_gen_id(&new_label_id, new_uuid, 0);
|
|
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_label_ent *label_ent;
|
|
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);
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
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;
|
|
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);
|
|
}
|
|
mutex_unlock(&nd_mapping->lock);
|
|
}
|
|
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);
|
|
uuid_t *uuid = NULL;
|
|
uuid_t **ns_uuid;
|
|
ssize_t rc = 0;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
ns_uuid = &nspm->uuid;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
nd_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, "result: %zd wrote: %s%s", rc, buf,
|
|
buf[len - 1] == '\n' ? "" : "\n");
|
|
nvdimm_bus_unlock(dev);
|
|
nd_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_ADMIN_RO(resource);
|
|
|
|
static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 };
|
|
|
|
static ssize_t sector_size_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
return nd_size_select_show(nspm->lbasize,
|
|
pmem_lbasize_supported, buf);
|
|
}
|
|
return -ENXIO;
|
|
}
|
|
|
|
static ssize_t sector_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);
|
|
const unsigned long *supported;
|
|
unsigned long *lbasize;
|
|
ssize_t rc = 0;
|
|
|
|
if (is_namespace_pmem(dev)) {
|
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
|
|
|
lbasize = &nspm->lbasize;
|
|
supported = pmem_lbasize_supported;
|
|
} else
|
|
return -ENXIO;
|
|
|
|
nd_device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
if (to_ndns(dev)->claim)
|
|
rc = -EBUSY;
|
|
if (rc >= 0)
|
|
rc = nd_size_select_store(dev, buf, lbasize, supported);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote",
|
|
buf, buf[len - 1] == '\n' ? "" : "\n");
|
|
nvdimm_bus_unlock(dev);
|
|
nd_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;
|
|
uuid_t *uuid = NULL;
|
|
int count = 0, i;
|
|
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;
|
|
}
|
|
|
|
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 int btt_claim_class(struct device *dev)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
int i, loop_bitmask = 0;
|
|
|
|
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_index *nsindex;
|
|
|
|
/*
|
|
* If any of the DIMMs do not support labels the only
|
|
* possible BTT format is v1.
|
|
*/
|
|
if (!ndd) {
|
|
loop_bitmask = 0;
|
|
break;
|
|
}
|
|
|
|
nsindex = to_namespace_index(ndd, ndd->ns_current);
|
|
if (nsindex == NULL)
|
|
loop_bitmask |= 1;
|
|
else {
|
|
/* check whether existing labels are v1.1 or v1.2 */
|
|
if (__le16_to_cpu(nsindex->major) == 1
|
|
&& __le16_to_cpu(nsindex->minor) == 1)
|
|
loop_bitmask |= 2;
|
|
else
|
|
loop_bitmask |= 4;
|
|
}
|
|
}
|
|
/*
|
|
* If nsindex is null loop_bitmask's bit 0 will be set, and if an index
|
|
* block is found, a v1.1 label for any mapping will set bit 1, and a
|
|
* v1.2 label will set bit 2.
|
|
*
|
|
* At the end of the loop, at most one of the three bits must be set.
|
|
* If multiple bits were set, it means the different mappings disagree
|
|
* about their labels, and this must be cleaned up first.
|
|
*
|
|
* If all the label index blocks are found to agree, nsindex of NULL
|
|
* implies labels haven't been initialized yet, and when they will,
|
|
* they will be of the 1.2 format, so we can assume BTT2.0
|
|
*
|
|
* If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are
|
|
* found, we enforce BTT2.0
|
|
*
|
|
* If the loop was never entered, default to BTT1.1 (legacy namespaces)
|
|
*/
|
|
switch (loop_bitmask) {
|
|
case 0:
|
|
case 2:
|
|
return NVDIMM_CCLASS_BTT;
|
|
case 1:
|
|
case 4:
|
|
return NVDIMM_CCLASS_BTT2;
|
|
default:
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
nd_device_lock(dev);
|
|
rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : "");
|
|
nd_device_unlock(dev);
|
|
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR_RO(holder);
|
|
|
|
static int __holder_class_store(struct device *dev, const char *buf)
|
|
{
|
|
struct nd_namespace_common *ndns = to_ndns(dev);
|
|
|
|
if (dev->driver || ndns->claim)
|
|
return -EBUSY;
|
|
|
|
if (sysfs_streq(buf, "btt")) {
|
|
int rc = btt_claim_class(dev);
|
|
|
|
if (rc < NVDIMM_CCLASS_NONE)
|
|
return rc;
|
|
ndns->claim_class = rc;
|
|
} else if (sysfs_streq(buf, "pfn"))
|
|
ndns->claim_class = NVDIMM_CCLASS_PFN;
|
|
else if (sysfs_streq(buf, "dax"))
|
|
ndns->claim_class = NVDIMM_CCLASS_DAX;
|
|
else if (sysfs_streq(buf, ""))
|
|
ndns->claim_class = NVDIMM_CCLASS_NONE;
|
|
else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t holder_class_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev->parent);
|
|
int rc;
|
|
|
|
nd_device_lock(dev);
|
|
nvdimm_bus_lock(dev);
|
|
wait_nvdimm_bus_probe_idle(dev);
|
|
rc = __holder_class_store(dev, buf);
|
|
if (rc >= 0)
|
|
rc = nd_namespace_label_update(nd_region, dev);
|
|
dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc);
|
|
nvdimm_bus_unlock(dev);
|
|
nd_device_unlock(dev);
|
|
|
|
return rc < 0 ? rc : len;
|
|
}
|
|
|
|
static ssize_t holder_class_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_namespace_common *ndns = to_ndns(dev);
|
|
ssize_t rc;
|
|
|
|
nd_device_lock(dev);
|
|
if (ndns->claim_class == NVDIMM_CCLASS_NONE)
|
|
rc = sprintf(buf, "\n");
|
|
else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) ||
|
|
(ndns->claim_class == NVDIMM_CCLASS_BTT2))
|
|
rc = sprintf(buf, "btt\n");
|
|
else if (ndns->claim_class == NVDIMM_CCLASS_PFN)
|
|
rc = sprintf(buf, "pfn\n");
|
|
else if (ndns->claim_class == NVDIMM_CCLASS_DAX)
|
|
rc = sprintf(buf, "dax\n");
|
|
else
|
|
rc = sprintf(buf, "<unknown>\n");
|
|
nd_device_unlock(dev);
|
|
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR_RW(holder_class);
|
|
|
|
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;
|
|
|
|
nd_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);
|
|
nd_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,
|
|
&dev_attr_holder_class.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 (is_namespace_pmem(dev)) {
|
|
if (a == &dev_attr_size.attr)
|
|
return 0644;
|
|
|
|
return a->mode;
|
|
}
|
|
|
|
/* base is_namespace_io() attributes */
|
|
if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr ||
|
|
a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr ||
|
|
a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr ||
|
|
a == &dev_attr_resource.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,
|
|
};
|
|
|
|
static const struct device_type namespace_io_device_type = {
|
|
.name = "nd_namespace_io",
|
|
.release = namespace_io_release,
|
|
.groups = nd_namespace_attribute_groups,
|
|
};
|
|
|
|
static const struct device_type namespace_pmem_device_type = {
|
|
.name = "nd_namespace_pmem",
|
|
.release = namespace_pmem_release,
|
|
.groups = nd_namespace_attribute_groups,
|
|
};
|
|
|
|
static bool is_namespace_pmem(const struct device *dev)
|
|
{
|
|
return dev ? dev->type == &namespace_pmem_device_type : false;
|
|
}
|
|
|
|
static bool is_namespace_io(const struct device *dev)
|
|
{
|
|
return dev ? dev->type == &namespace_io_device_type : false;
|
|
}
|
|
|
|
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.
|
|
*/
|
|
nd_device_lock(&ndns->dev);
|
|
nd_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);
|
|
}
|
|
}
|
|
|
|
if (nvdimm_namespace_locked(ndns))
|
|
return ERR_PTR(-EACCES);
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Note, alignment validation for fsdax and devdax mode
|
|
* namespaces happens in nd_pfn_validate() where infoblock
|
|
* padding parameters can be applied.
|
|
*/
|
|
if (pmem_should_map_pages(dev)) {
|
|
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
|
|
struct resource *res = &nsio->res;
|
|
|
|
if (!IS_ALIGNED(res->start | (res->end + 1),
|
|
memremap_compat_align())) {
|
|
dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res);
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
return ndns;
|
|
}
|
|
EXPORT_SYMBOL(nvdimm_namespace_common_probe);
|
|
|
|
int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
|
|
resource_size_t size)
|
|
{
|
|
return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size);
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_namespace_enable);
|
|
|
|
void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns)
|
|
{
|
|
devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev));
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_namespace_disable);
|
|
|
|
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, const uuid_t *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_interleave_set *nd_set = nd_region->nd_set;
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
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;
|
|
|
|
if (!nd_label)
|
|
continue;
|
|
position = nsl_get_position(ndd, nd_label);
|
|
|
|
if (!nsl_validate_isetcookie(ndd, nd_label, cookie))
|
|
continue;
|
|
|
|
if (!nsl_uuid_equal(ndd, nd_label, uuid))
|
|
continue;
|
|
|
|
if (!nsl_validate_type_guid(ndd, nd_label,
|
|
&nd_set->type_guid))
|
|
continue;
|
|
|
|
if (found_uuid) {
|
|
dev_dbg(ndd->dev, "duplicate entry for uuid\n");
|
|
return false;
|
|
}
|
|
found_uuid = true;
|
|
if (!nsl_validate_nlabel(nd_region, ndd, nd_label))
|
|
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, const uuid_t *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;
|
|
|
|
lockdep_assert_held(&nd_mapping->lock);
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) {
|
|
nd_label = label_ent->label;
|
|
if (!nd_label)
|
|
continue;
|
|
if (nsl_uuid_equal(ndd, nd_label, pmem_id))
|
|
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 = nsl_get_dpa(ndd, nd_label);
|
|
pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label);
|
|
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),
|
|
nsl_uuid_raw(ndd, nd_label));
|
|
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
|
|
*/
|
|
static struct device *create_namespace_pmem(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping,
|
|
struct nd_namespace_label *nd_label)
|
|
{
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
struct nd_namespace_index *nsindex =
|
|
to_namespace_index(ndd, ndd->ns_current);
|
|
u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex);
|
|
u64 altcookie = nd_region_interleave_set_altcookie(nd_region);
|
|
struct nd_label_ent *label_ent;
|
|
struct nd_namespace_pmem *nspm;
|
|
resource_size_t size = 0;
|
|
struct resource *res;
|
|
struct device *dev;
|
|
uuid_t uuid;
|
|
int rc = 0;
|
|
u16 i;
|
|
|
|
if (cookie == 0) {
|
|
dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) {
|
|
dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
|
|
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",
|
|
nsl_uuid_raw(ndd, nd_label));
|
|
}
|
|
|
|
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++) {
|
|
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, &uuid, altcookie, i))
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
if (i < nd_region->ndr_mappings) {
|
|
struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm;
|
|
|
|
/*
|
|
* 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",
|
|
nvdimm_name(nvdimm), nsl_uuid_raw(ndd, nd_label));
|
|
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.
|
|
*/
|
|
nsl_get_uuid(ndd, nd_label, &uuid);
|
|
rc = select_pmem_id(nd_region, &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;
|
|
struct nvdimm_drvdata *ndd;
|
|
|
|
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 : NULL;
|
|
|
|
if (!label0) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
ndd = to_ndd(nd_mapping);
|
|
size += nsl_get_rawsize(ndd, label0);
|
|
if (nsl_get_position(ndd, label0) != 0)
|
|
continue;
|
|
WARN_ON(nspm->alt_name || nspm->uuid);
|
|
nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0),
|
|
NSLABEL_NAME_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);
|
|
}
|
|
|
|
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, "invalid label(s)\n");
|
|
break;
|
|
case -ENODEV:
|
|
dev_dbg(&nd_region->dev, "label not found\n");
|
|
break;
|
|
default:
|
|
dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc);
|
|
break;
|
|
}
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
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_memory(&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);
|
|
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;
|
|
|
|
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 namespace\n");
|
|
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++) {
|
|
uuid_t *uuid = namespace_to_uuid(devs[i]);
|
|
|
|
if (IS_ERR(uuid)) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
if (!nsl_uuid_equal(ndd, nd_label, uuid))
|
|
continue;
|
|
dev_err(&nd_region->dev,
|
|
"error: conflicting extents for uuid: %pUb\n", uuid);
|
|
return -ENXIO;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
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_pmem *nspm_a, *nspm_b;
|
|
|
|
if (is_namespace_io(dev_a))
|
|
return 0;
|
|
|
|
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];
|
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
|
|
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;
|
|
|
|
if (!nd_label)
|
|
continue;
|
|
|
|
/* skip labels that describe extents outside of the region */
|
|
if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start ||
|
|
nsl_get_dpa(ndd, nd_label) > 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;
|
|
|
|
dev = create_namespace_pmem(nd_region, nd_mapping, 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, "discovered %d namespace%s\n", count,
|
|
count == 1 ? "" : "s");
|
|
|
|
if (count == 0) {
|
|
struct nd_namespace_pmem *nspm;
|
|
|
|
/* Publish a zero-sized namespace for userspace to configure. */
|
|
nd_mapping_free_labels(nd_mapping);
|
|
|
|
devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
|
|
if (!devs)
|
|
goto err;
|
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
|
|
if (!nspm)
|
|
goto err;
|
|
dev = &nspm->nsio.common.dev;
|
|
dev->type = &namespace_pmem_device_type;
|
|
nd_namespace_pmem_set_resource(nd_region, nspm, 0);
|
|
dev->parent = &nd_region->dev;
|
|
devs[count++] = dev;
|
|
} else if (is_memory(&nd_region->dev)) {
|
|
/* 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:
|
|
if (devs) {
|
|
for (i = 0; devs[i]; i++)
|
|
namespace_pmem_release(devs[i]);
|
|
kfree(devs);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct device **create_namespaces(struct nd_region *nd_region)
|
|
{
|
|
struct nd_mapping *nd_mapping;
|
|
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 void deactivate_labels(void *region)
|
|
{
|
|
struct nd_region *nd_region = 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 = nd_mapping->ndd;
|
|
struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
|
|
|
mutex_lock(&nd_mapping->lock);
|
|
nd_mapping_free_labels(nd_mapping);
|
|
mutex_unlock(&nd_mapping->lock);
|
|
|
|
put_ndd(ndd);
|
|
nd_mapping->ndd = NULL;
|
|
if (ndd)
|
|
atomic_dec(&nvdimm->busy);
|
|
}
|
|
}
|
|
|
|
static int init_active_labels(struct nd_region *nd_region)
|
|
{
|
|
int i, rc = 0;
|
|
|
|
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 we may need to prevent
|
|
* the region from being activated.
|
|
*/
|
|
if (!ndd) {
|
|
if (test_bit(NDD_LOCKED, &nvdimm->flags))
|
|
/* fail, label data may be unreadable */;
|
|
else if (test_bit(NDD_LABELING, &nvdimm->flags))
|
|
/* fail, labels needed to disambiguate dpa */;
|
|
else
|
|
continue;
|
|
|
|
dev_err(&nd_region->dev, "%s: is %s, failing probe\n",
|
|
dev_name(&nd_mapping->nvdimm->dev),
|
|
test_bit(NDD_LOCKED, &nvdimm->flags)
|
|
? "locked" : "disabled");
|
|
rc = -ENXIO;
|
|
goto out;
|
|
}
|
|
nd_mapping->ndd = ndd;
|
|
atomic_inc(&nvdimm->busy);
|
|
get_ndd(ndd);
|
|
|
|
count = nd_label_active_count(ndd);
|
|
dev_dbg(ndd->dev, "count: %d\n", 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)
|
|
break;
|
|
}
|
|
|
|
if (i < nd_region->ndr_mappings)
|
|
rc = -ENOMEM;
|
|
|
|
out:
|
|
if (rc) {
|
|
deactivate_labels(nd_region);
|
|
return rc;
|
|
}
|
|
|
|
return devm_add_action_or_reset(&nd_region->dev, deactivate_labels,
|
|
nd_region);
|
|
}
|
|
|
|
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:
|
|
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_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);
|
|
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;
|
|
}
|