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drivers/nvdimm/namespace_devs.c
64.8 KB
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/* * 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> |
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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 "nd.h" static void namespace_io_release(struct device *dev) { struct nd_namespace_io *nsio = to_nd_namespace_io(dev); kfree(nsio); } |
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static void namespace_pmem_release(struct device *dev) { 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) ida_simple_remove(&nd_region->ns_ida, nspm->id); |
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kfree(nspm->alt_name); kfree(nspm->uuid); kfree(nspm); } static void namespace_blk_release(struct device *dev) { |
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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); |
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} |
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static const struct device_type namespace_io_device_type = { |
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.name = "nd_namespace_io", .release = namespace_io_release, }; |
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static const struct device_type namespace_pmem_device_type = { |
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.name = "nd_namespace_pmem", .release = namespace_pmem_release, }; |
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static const struct device_type namespace_blk_device_type = { |
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.name = "nd_namespace_blk", .release = namespace_blk_release, }; |
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static bool is_namespace_pmem(const struct device *dev) |
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{ return dev ? dev->type == &namespace_pmem_device_type : false; } |
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static bool is_namespace_blk(const struct device *dev) |
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{ return dev ? dev->type == &namespace_blk_device_type : false; } |
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static bool is_namespace_io(const struct device *dev) |
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{ return dev ? dev->type == &namespace_io_device_type : false; } |
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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) { |
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if (is_nd_region(dev)) |
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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; } |
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bool pmem_should_map_pages(struct device *dev) { struct nd_region *nd_region = to_nd_region(dev->parent); |
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struct nd_namespace_io *nsio; |
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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; |
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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; |
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return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
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} EXPORT_SYMBOL(pmem_should_map_pages); |
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unsigned int pmem_sector_size(struct nd_namespace_common *ndns) { if (is_namespace_pmem(&ndns->dev)) { struct nd_namespace_pmem *nspm; nspm = to_nd_namespace_pmem(&ndns->dev); if (nspm->lbasize == 0 || nspm->lbasize == 512) /* default */; else if (nspm->lbasize == 4096) return 4096; else dev_WARN(&ndns->dev, "unsupported sector size: %ld ", nspm->lbasize); } /* * There is no namespace label (is_namespace_io()), or the label * indicates the default sector size. */ return 512; } EXPORT_SYMBOL(pmem_sector_size); |
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const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, char *name) { 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)) suffix = "s"; |
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if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
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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 : ""); |
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} else if (is_namespace_blk(&ndns->dev)) { |
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struct nd_namespace_blk *nsblk; nsblk = to_nd_namespace_blk(&ndns->dev); |
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sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, suffix ? suffix : ""); |
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} else { return NULL; } return name; } EXPORT_SYMBOL(nvdimm_namespace_disk_name); |
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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); |
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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 ", nd_region_to_nstype(nd_region)); } static DEVICE_ATTR_RO(nstype); |
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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)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); ns_altname = &nsblk->alt_name; |
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} else return -ENXIO; |
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if (dev->driver || to_ndns(dev)->claim) |
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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; } |
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static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) { |
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struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
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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; } |
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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; /* |
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* Resources with unacknowledged adjustments indicate a |
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* 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); |
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static int nd_namespace_label_update(struct nd_region *nd_region, struct device *dev) { |
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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 "); |
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if (dev->driver || to_ndns(dev)->claim) |
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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); |
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resource_size_t size = resource_size(&nspm->nsio.res); |
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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)) { |
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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); |
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} else return -ENXIO; } |
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static ssize_t alt_name_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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ssize_t rc; device_lock(dev); nvdimm_bus_lock(dev); wait_nvdimm_bus_probe_idle(dev); rc = __alt_name_store(dev, buf, len); |
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if (rc >= 0) rc = nd_namespace_label_update(nd_region, dev); |
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dev_dbg(dev, "%s: %s(%zd) ", __func__, rc < 0 ? "fail " : "", rc); nvdimm_bus_unlock(dev); device_unlock(dev); |
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return rc < 0 ? rc : len; |
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} 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)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); ns_altname = nsblk->alt_name; |
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} else return -ENXIO; return sprintf(buf, "%s ", 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 ", 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); |
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if (rc == 0) res->flags |= DPA_RESOURCE_ADJUSTED; |
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nd_dbg_dpa(nd_region, ndd, res, "shrink %d ", 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 ", rc); return rc ? n : 0; } |
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/** * 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) |
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{ |
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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; |
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} 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); |
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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) if (strcmp(label_id->id, res->name) == 0) exist = res; valid.start = nd_mapping->start; valid.end = mapping_end; valid.name = "free space"; |
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retry: first = 0; 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; 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) { |
762d067db libnvdimm, namesp... |
637 638 639 640 641 642 |
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) |
bf9bccc14 libnvdimm: pmem l... |
643 644 645 646 647 |
loc = ALLOC_BEFORE; } /* space between allocations */ if (!loc && next) { |
762d067db libnvdimm, namesp... |
648 649 650 651 652 653 |
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) |
bf9bccc14 libnvdimm: pmem l... |
654 |
loc = ALLOC_MID; |
bf9bccc14 libnvdimm: pmem l... |
655 656 657 658 |
} /* space at the end of the mapping */ if (!loc && !next) { |
762d067db libnvdimm, namesp... |
659 660 661 662 663 664 |
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) |
bf9bccc14 libnvdimm: pmem l... |
665 |
loc = ALLOC_AFTER; |
bf9bccc14 libnvdimm: pmem l... |
666 667 668 669 670 671 672 673 674 |
} 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 */ |
bf9bccc14 libnvdimm: pmem l... |
675 676 677 678 679 680 681 682 683 |
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 */ |
bf9bccc14 libnvdimm: pmem l... |
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 |
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) |
762d067db libnvdimm, namesp... |
707 |
valid.start += available - allocate; |
bf9bccc14 libnvdimm: pmem l... |
708 709 |
new_res = nvdimm_allocate_dpa(ndd, label_id, |
762d067db libnvdimm, namesp... |
710 |
valid.start, allocate); |
bf9bccc14 libnvdimm: pmem l... |
711 712 713 714 715 716 |
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); |
1b40e09a1 libnvdimm: blk la... |
717 718 |
if (rc == 0) res->flags |= DPA_RESOURCE_ADJUSTED; |
bf9bccc14 libnvdimm: pmem l... |
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 |
} if (!new_res) new_res = res; nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d ", 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; } |
1b40e09a1 libnvdimm: blk la... |
744 745 746 747 748 749 |
/* * 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) |
bf9bccc14 libnvdimm: pmem l... |
750 751 752 |
return init_dpa_allocation(label_id, nd_region, nd_mapping, n); return n; } |
1b40e09a1 libnvdimm: blk la... |
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 |
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 ", 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; |
c9e582aa6 libnvdimm, nfit: ... |
791 |
if (!is_memory(dev)) |
1b40e09a1 libnvdimm: blk la... |
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 |
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 ", (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; } |
bf9bccc14 libnvdimm: pmem l... |
845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 |
/** * 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) { |
1b40e09a1 libnvdimm: blk la... |
861 862 |
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
bf9bccc14 libnvdimm: pmem l... |
863 864 865 866 |
int i; for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
1b40e09a1 libnvdimm: blk la... |
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 |
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); |
bf9bccc14 libnvdimm: pmem l... |
886 |
|
1b40e09a1 libnvdimm: blk la... |
887 888 889 890 891 892 893 894 895 896 897 898 899 900 |
/* try again and allow encroachments into PMEM */ if (rem == 0) break; } dev_WARN_ONCE(&nd_region->dev, rem, "allocation underrun: %#llx of %#llx bytes ", (unsigned long long) n - rem, (unsigned long long) n); if (rem) return -ENXIO; rc = merge_dpa(nd_region, nd_mapping, label_id); |
bf9bccc14 libnvdimm: pmem l... |
901 902 903 904 905 906 |
if (rc) return rc; } return 0; } |
0e3b0d123 libnvdimm, namesp... |
907 |
static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
bf9bccc14 libnvdimm: pmem l... |
908 909 910 |
struct nd_namespace_pmem *nspm, resource_size_t size) { struct resource *res = &nspm->nsio.res; |
0e3b0d123 libnvdimm, namesp... |
911 |
resource_size_t offset = 0; |
bf9bccc14 libnvdimm: pmem l... |
912 |
|
0e3b0d123 libnvdimm, namesp... |
913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 |
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; |
bf9bccc14 libnvdimm: pmem l... |
946 |
} |
bd26d0d0c nvdimm: improve d... |
947 948 949 950 951 952 953 954 955 |
static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) { if (!uuid) { dev_dbg(dev, "%s: uuid not set ", where); return true; } return false; } |
bf9bccc14 libnvdimm: pmem l... |
956 957 958 959 |
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); |
1f19b983a libnvdimm, namesp... |
960 |
struct nd_namespace_common *ndns = to_ndns(dev); |
bf9bccc14 libnvdimm: pmem l... |
961 962 963 964 |
struct nd_mapping *nd_mapping; struct nvdimm_drvdata *ndd; struct nd_label_id label_id; u32 flags = 0, remainder; |
9d032f420 libnvdimm, namesp... |
965 |
int rc, i, id = -1; |
bf9bccc14 libnvdimm: pmem l... |
966 |
u8 *uuid = NULL; |
bf9bccc14 libnvdimm: pmem l... |
967 |
|
1f19b983a libnvdimm, namesp... |
968 |
if (dev->driver || ndns->claim) |
bf9bccc14 libnvdimm: pmem l... |
969 970 971 972 973 974 |
return -EBUSY; if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); uuid = nspm->uuid; |
9d032f420 libnvdimm, namesp... |
975 |
id = nspm->id; |
bf9bccc14 libnvdimm: pmem l... |
976 |
} else if (is_namespace_blk(dev)) { |
1b40e09a1 libnvdimm: blk la... |
977 978 979 980 |
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); uuid = nsblk->uuid; flags = NSLABEL_FLAG_LOCAL; |
9d032f420 libnvdimm, namesp... |
981 |
id = nsblk->id; |
bf9bccc14 libnvdimm: pmem l... |
982 983 984 985 986 987 |
} /* * We need a uuid for the allocation-label and dimm(s) on which * to store the label. */ |
bd26d0d0c nvdimm: improve d... |
988 |
if (uuid_not_set(uuid, dev, __func__)) |
bf9bccc14 libnvdimm: pmem l... |
989 |
return -ENXIO; |
bd26d0d0c nvdimm: improve d... |
990 991 992 993 994 |
if (nd_region->ndr_mappings == 0) { dev_dbg(dev, "%s: not associated with dimm(s) ", __func__); return -ENXIO; } |
bf9bccc14 libnvdimm: pmem l... |
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 |
div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); if (remainder) { dev_dbg(dev, "%llu is not %dK aligned ", 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); |
0e3b0d123 libnvdimm, namesp... |
1039 |
nd_namespace_pmem_set_resource(nd_region, nspm, |
bf9bccc14 libnvdimm: pmem l... |
1040 1041 |
val * nd_region->ndr_mappings); } |
1f19b983a libnvdimm, namesp... |
1042 1043 |
/* * Try to delete the namespace if we deleted all of its |
9d032f420 libnvdimm, namesp... |
1044 1045 1046 |
* 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. |
1f19b983a libnvdimm, namesp... |
1047 |
*/ |
9d032f420 libnvdimm, namesp... |
1048 |
if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
1f19b983a libnvdimm, namesp... |
1049 |
nd_device_unregister(dev, ND_ASYNC); |
bf9bccc14 libnvdimm: pmem l... |
1050 1051 1052 1053 1054 1055 |
return rc; } static ssize_t size_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { |
f524bf271 libnvdimm: write ... |
1056 |
struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc14 libnvdimm: pmem l... |
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 |
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); |
f524bf271 libnvdimm: write ... |
1069 1070 |
if (rc >= 0) rc = nd_namespace_label_update(nd_region, dev); |
bf9bccc14 libnvdimm: pmem l... |
1071 1072 1073 1074 1075 1076 |
if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); uuid = &nspm->uuid; } else if (is_namespace_blk(dev)) { |
1b40e09a1 libnvdimm: blk la... |
1077 1078 1079 |
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); uuid = &nsblk->uuid; |
bf9bccc14 libnvdimm: pmem l... |
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 |
} if (rc == 0 && val == 0 && uuid) { /* setting size zero == 'delete namespace' */ kfree(*uuid); *uuid = NULL; } dev_dbg(dev, "%s: %llx %s (%d) ", __func__, val, rc < 0 ? "fail" : "success", rc); nvdimm_bus_unlock(dev); device_unlock(dev); |
f524bf271 libnvdimm: write ... |
1094 |
return rc < 0 ? rc : len; |
bf9bccc14 libnvdimm: pmem l... |
1095 |
} |
8c2f7e865 libnvdimm: infras... |
1096 |
resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc14 libnvdimm: pmem l... |
1097 |
{ |
8c2f7e865 libnvdimm: infras... |
1098 |
struct device *dev = &ndns->dev; |
1b40e09a1 libnvdimm: blk la... |
1099 |
|
bf9bccc14 libnvdimm: pmem l... |
1100 1101 |
if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
8c2f7e865 libnvdimm: infras... |
1102 |
return resource_size(&nspm->nsio.res); |
bf9bccc14 libnvdimm: pmem l... |
1103 |
} else if (is_namespace_blk(dev)) { |
8c2f7e865 libnvdimm: infras... |
1104 |
return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc14 libnvdimm: pmem l... |
1105 1106 |
} else if (is_namespace_io(dev)) { struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
8c2f7e865 libnvdimm: infras... |
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 |
return resource_size(&nsio->res); } else WARN_ONCE(1, "unknown namespace type "); return 0; } resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) { resource_size_t size; |
1b40e09a1 libnvdimm: blk la... |
1117 |
|
8c2f7e865 libnvdimm: infras... |
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 |
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 ", (unsigned long long) nvdimm_namespace_capacity(to_ndns(dev))); |
bf9bccc14 libnvdimm: pmem l... |
1132 |
} |
b44fe7604 libnvdimm, namesp... |
1133 |
static DEVICE_ATTR(size, 0444, size_show, size_store); |
bf9bccc14 libnvdimm: pmem l... |
1134 |
|
f95b4bca9 libnvdimm, namesp... |
1135 |
static u8 *namespace_to_uuid(struct device *dev) |
bf9bccc14 libnvdimm: pmem l... |
1136 |
{ |
bf9bccc14 libnvdimm: pmem l... |
1137 1138 |
if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
f95b4bca9 libnvdimm, namesp... |
1139 |
return nspm->uuid; |
bf9bccc14 libnvdimm: pmem l... |
1140 |
} else if (is_namespace_blk(dev)) { |
1b40e09a1 libnvdimm: blk la... |
1141 |
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
f95b4bca9 libnvdimm, namesp... |
1142 |
return nsblk->uuid; |
bf9bccc14 libnvdimm: pmem l... |
1143 |
} else |
f95b4bca9 libnvdimm, namesp... |
1144 1145 1146 1147 1148 1149 1150 |
return ERR_PTR(-ENXIO); } static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, char *buf) { u8 *uuid = namespace_to_uuid(dev); |
bf9bccc14 libnvdimm: pmem l... |
1151 |
|
f95b4bca9 libnvdimm, namesp... |
1152 1153 |
if (IS_ERR(uuid)) return PTR_ERR(uuid); |
bf9bccc14 libnvdimm: pmem l... |
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 |
if (uuid) return sprintf(buf, "%pUb ", uuid); return sprintf(buf, " "); } /** * 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; |
f524bf271 libnvdimm: write ... |
1174 |
int i; |
bf9bccc14 libnvdimm: pmem l... |
1175 |
|
f524bf271 libnvdimm: write ... |
1176 1177 |
if (!nd_is_uuid_unique(dev, new_uuid)) return -EINVAL; |
bf9bccc14 libnvdimm: pmem l... |
1178 1179 1180 |
if (*old_uuid == NULL) goto out; |
f524bf271 libnvdimm: write ... |
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 |
/* * 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? */ |
ae8219f18 libnvdimm, label:... |
1197 |
if (list_empty(&nd_mapping->labels)) |
f524bf271 libnvdimm: write ... |
1198 1199 |
return -EBUSY; } |
bf9bccc14 libnvdimm: pmem l... |
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 |
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; |
8c2f7e865 libnvdimm: infras... |
1223 |
ssize_t rc = 0; |
bf9bccc14 libnvdimm: pmem l... |
1224 |
u8 **ns_uuid; |
bf9bccc14 libnvdimm: pmem l... |
1225 1226 1227 1228 1229 1230 |
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)) { |
1b40e09a1 libnvdimm: blk la... |
1231 1232 1233 |
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); ns_uuid = &nsblk->uuid; |
bf9bccc14 libnvdimm: pmem l... |
1234 1235 1236 1237 1238 1239 |
} else return -ENXIO; device_lock(dev); nvdimm_bus_lock(dev); wait_nvdimm_bus_probe_idle(dev); |
8c2f7e865 libnvdimm: infras... |
1240 1241 1242 1243 |
if (to_ndns(dev)->claim) rc = -EBUSY; if (rc >= 0) rc = nd_uuid_store(dev, &uuid, buf, len); |
bf9bccc14 libnvdimm: pmem l... |
1244 1245 |
if (rc >= 0) rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); |
f524bf271 libnvdimm: write ... |
1246 1247 1248 1249 |
if (rc >= 0) rc = nd_namespace_label_update(nd_region, dev); else kfree(uuid); |
bf9bccc14 libnvdimm: pmem l... |
1250 1251 1252 1253 1254 1255 |
dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, rc, buf, buf[len - 1] == ' ' ? "" : " "); nvdimm_bus_unlock(dev); device_unlock(dev); |
f524bf271 libnvdimm: write ... |
1256 |
return rc < 0 ? rc : len; |
bf9bccc14 libnvdimm: pmem l... |
1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 |
} 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 ", (unsigned long long) res->start); } static DEVICE_ATTR_RO(resource); |
f979b13c3 libnvdimm, label:... |
1283 |
static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, |
fcae69573 libnvdimm, blk: a... |
1284 |
4096, 4104, 4160, 4224, 0 }; |
1b40e09a1 libnvdimm: blk la... |
1285 |
|
f979b13c3 libnvdimm, label:... |
1286 |
static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
1b40e09a1 libnvdimm: blk la... |
1287 1288 1289 |
static ssize_t sector_size_show(struct device *dev, struct device_attribute *attr, char *buf) { |
f979b13c3 libnvdimm, label:... |
1290 1291 |
if (is_namespace_blk(dev)) { struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1b40e09a1 libnvdimm: blk la... |
1292 |
|
b2c48f9f9 libnvdimm: rename... |
1293 |
return nd_size_select_show(nsblk->lbasize, |
f979b13c3 libnvdimm, label:... |
1294 1295 |
blk_lbasize_supported, buf); } |
1b40e09a1 libnvdimm: blk la... |
1296 |
|
f979b13c3 libnvdimm, label:... |
1297 1298 |
if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
b2c48f9f9 libnvdimm: rename... |
1299 |
return nd_size_select_show(nspm->lbasize, |
f979b13c3 libnvdimm, label:... |
1300 1301 1302 |
pmem_lbasize_supported, buf); } return -ENXIO; |
1b40e09a1 libnvdimm: blk la... |
1303 1304 1305 1306 1307 |
} static ssize_t sector_size_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { |
f524bf271 libnvdimm: write ... |
1308 |
struct nd_region *nd_region = to_nd_region(dev->parent); |
f979b13c3 libnvdimm, label:... |
1309 1310 |
const unsigned long *supported; unsigned long *lbasize; |
8c2f7e865 libnvdimm: infras... |
1311 |
ssize_t rc = 0; |
1b40e09a1 libnvdimm: blk la... |
1312 |
|
f979b13c3 libnvdimm, label:... |
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 |
if (is_namespace_blk(dev)) { struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); lbasize = &nsblk->lbasize; supported = blk_lbasize_supported; } else if (is_namespace_pmem(dev)) { struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); lbasize = &nspm->lbasize; supported = pmem_lbasize_supported; } else |
1b40e09a1 libnvdimm: blk la... |
1324 1325 1326 1327 |
return -ENXIO; device_lock(dev); nvdimm_bus_lock(dev); |
8c2f7e865 libnvdimm: infras... |
1328 1329 1330 |
if (to_ndns(dev)->claim) rc = -EBUSY; if (rc >= 0) |
b2c48f9f9 libnvdimm: rename... |
1331 |
rc = nd_size_select_store(dev, buf, lbasize, supported); |
f524bf271 libnvdimm: write ... |
1332 1333 1334 1335 1336 1337 1338 |
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] == ' ' ? "" : " "); |
1b40e09a1 libnvdimm: blk la... |
1339 1340 1341 1342 1343 1344 |
nvdimm_bus_unlock(dev); device_unlock(dev); return rc ? rc : len; } static DEVICE_ATTR_RW(sector_size); |
0ba1c6348 libnvdimm: write ... |
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 |
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 ", count); } static DEVICE_ATTR_RO(dpa_extents); |
14e494542 libnvdimm, btt: B... |
1387 1388 1389 1390 1391 1392 1393 1394 1395 |
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; |
33a560867 libnvdimm, namesp... |
1396 1397 1398 1399 1400 1401 1402 1403 |
/* * If any of the DIMMs do not support labels the only * possible BTT format is v1. */ if (!ndd) { loop_bitmask = 0; break; } |
14e494542 libnvdimm, btt: B... |
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 |
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; } } |
8c2f7e865 libnvdimm: infras... |
1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 |
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 ", ndns->claim ? dev_name(ndns->claim) : ""); device_unlock(dev); return rc; } static DEVICE_ATTR_RO(holder); |
b3fde74ea libnvdimm, label:... |
1459 1460 1461 1462 1463 1464 1465 1466 1467 |
static ssize_t __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 (strcmp(buf, "btt") == 0 || strcmp(buf, "btt ") == 0) |
14e494542 libnvdimm, btt: B... |
1468 |
ndns->claim_class = btt_claim_class(dev); |
b3fde74ea libnvdimm, label:... |
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 |
else if (strcmp(buf, "pfn") == 0 || strcmp(buf, "pfn ") == 0) ndns->claim_class = NVDIMM_CCLASS_PFN; else if (strcmp(buf, "dax") == 0 || strcmp(buf, "dax ") == 0) ndns->claim_class = NVDIMM_CCLASS_DAX; else if (strcmp(buf, "") == 0 || strcmp(buf, " ") == 0) ndns->claim_class = NVDIMM_CCLASS_NONE; else return -EINVAL; |
14e494542 libnvdimm, btt: B... |
1480 1481 1482 |
/* btt_claim_class() could've returned an error */ if (ndns->claim_class < 0) return ndns->claim_class; |
b3fde74ea libnvdimm, label:... |
1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 |
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); ssize_t rc; 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: %s(%zd) ", __func__, rc < 0 ? "fail " : "", rc); nvdimm_bus_unlock(dev); 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; device_lock(dev); if (ndns->claim_class == NVDIMM_CCLASS_NONE) rc = sprintf(buf, " "); |
14e494542 libnvdimm, btt: B... |
1516 1517 |
else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || (ndns->claim_class == NVDIMM_CCLASS_BTT2)) |
b3fde74ea libnvdimm, label:... |
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 |
rc = sprintf(buf, "btt "); else if (ndns->claim_class == NVDIMM_CCLASS_PFN) rc = sprintf(buf, "pfn "); else if (ndns->claim_class == NVDIMM_CCLASS_DAX) rc = sprintf(buf, "dax "); else rc = sprintf(buf, "<unknown> "); device_unlock(dev); return rc; } static DEVICE_ATTR_RW(holder_class); |
0731de0dd libnvdimm, pfn: m... |
1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 |
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; |
9c4124281 libnvdimm: fix mo... |
1544 |
if (claim && is_nd_btt(claim)) |
0731de0dd libnvdimm, pfn: m... |
1545 |
mode = "safe"; |
9c4124281 libnvdimm: fix mo... |
1546 1547 |
else if (claim && is_nd_pfn(claim)) mode = "memory"; |
cd03412a5 libnvdimm, dax: i... |
1548 1549 |
else if (claim && is_nd_dax(claim)) mode = "dax"; |
9c4124281 libnvdimm: fix mo... |
1550 1551 |
else if (!claim && pmem_should_map_pages(dev)) mode = "memory"; |
0731de0dd libnvdimm, pfn: m... |
1552 1553 1554 1555 1556 1557 1558 1559 1560 |
else mode = "raw"; rc = sprintf(buf, "%s ", mode); device_unlock(dev); return rc; } static DEVICE_ATTR_RO(mode); |
8c2f7e865 libnvdimm: infras... |
1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 |
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 ", to_ndns(dev)->force_raw); } static DEVICE_ATTR_RW(force_raw); |
3d88002e4 libnvdimm: suppor... |
1581 1582 |
static struct attribute *nd_namespace_attributes[] = { &dev_attr_nstype.attr, |
bf9bccc14 libnvdimm: pmem l... |
1583 |
&dev_attr_size.attr, |
0731de0dd libnvdimm, pfn: m... |
1584 |
&dev_attr_mode.attr, |
bf9bccc14 libnvdimm: pmem l... |
1585 |
&dev_attr_uuid.attr, |
8c2f7e865 libnvdimm: infras... |
1586 |
&dev_attr_holder.attr, |
bf9bccc14 libnvdimm: pmem l... |
1587 1588 |
&dev_attr_resource.attr, &dev_attr_alt_name.attr, |
8c2f7e865 libnvdimm: infras... |
1589 |
&dev_attr_force_raw.attr, |
1b40e09a1 libnvdimm: blk la... |
1590 |
&dev_attr_sector_size.attr, |
0ba1c6348 libnvdimm: write ... |
1591 |
&dev_attr_dpa_extents.attr, |
b3fde74ea libnvdimm, label:... |
1592 |
&dev_attr_holder_class.attr, |
3d88002e4 libnvdimm: suppor... |
1593 1594 |
NULL, }; |
bf9bccc14 libnvdimm: pmem l... |
1595 1596 1597 1598 1599 1600 1601 1602 |
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; |
65551fb50 libnvdimm, namesp... |
1603 |
return 0400; |
bf9bccc14 libnvdimm: pmem l... |
1604 1605 1606 1607 |
} if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { if (a == &dev_attr_size.attr) |
b44fe7604 libnvdimm, namesp... |
1608 |
return 0644; |
1b40e09a1 libnvdimm: blk la... |
1609 |
|
bf9bccc14 libnvdimm: pmem l... |
1610 1611 |
return a->mode; } |
8c2f7e865 libnvdimm: infras... |
1612 1613 |
if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr || a == &dev_attr_holder.attr |
b3fde74ea libnvdimm, label:... |
1614 |
|| a == &dev_attr_holder_class.attr |
0731de0dd libnvdimm, pfn: m... |
1615 1616 |
|| a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr) |
bf9bccc14 libnvdimm: pmem l... |
1617 1618 1619 1620 |
return a->mode; return 0; } |
3d88002e4 libnvdimm: suppor... |
1621 1622 |
static struct attribute_group nd_namespace_attribute_group = { .attrs = nd_namespace_attributes, |
bf9bccc14 libnvdimm: pmem l... |
1623 |
.is_visible = namespace_visible, |
3d88002e4 libnvdimm: suppor... |
1624 1625 1626 1627 1628 |
}; static const struct attribute_group *nd_namespace_attribute_groups[] = { &nd_device_attribute_group, &nd_namespace_attribute_group, |
74ae66c3b libnvdimm: Add sy... |
1629 |
&nd_numa_attribute_group, |
3d88002e4 libnvdimm: suppor... |
1630 1631 |
NULL, }; |
8c2f7e865 libnvdimm: infras... |
1632 1633 1634 |
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; |
e1455744b libnvdimm, pfn: '... |
1635 |
struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
cd03412a5 libnvdimm, dax: i... |
1636 |
struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
0bfb8dd3e libnvdimm: cleanu... |
1637 |
struct nd_namespace_common *ndns = NULL; |
8c2f7e865 libnvdimm: infras... |
1638 |
resource_size_t size; |
cd03412a5 libnvdimm, dax: i... |
1639 |
if (nd_btt || nd_pfn || nd_dax) { |
0bfb8dd3e libnvdimm: cleanu... |
1640 |
if (nd_btt) |
e1455744b libnvdimm, pfn: '... |
1641 |
ndns = nd_btt->ndns; |
0bfb8dd3e libnvdimm: cleanu... |
1642 |
else if (nd_pfn) |
e1455744b libnvdimm, pfn: '... |
1643 |
ndns = nd_pfn->ndns; |
cd03412a5 libnvdimm, dax: i... |
1644 1645 |
else if (nd_dax) ndns = nd_dax->nd_pfn.ndns; |
e1455744b libnvdimm, pfn: '... |
1646 |
|
0bfb8dd3e libnvdimm: cleanu... |
1647 |
if (!ndns) |
8c2f7e865 libnvdimm: infras... |
1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 |
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 ", |
0bfb8dd3e libnvdimm: cleanu... |
1659 |
dev_name(dev)); |
8c2f7e865 libnvdimm: infras... |
1660 1661 |
return ERR_PTR(-EBUSY); } |
0bfb8dd3e libnvdimm: cleanu... |
1662 |
if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
8c2f7e865 libnvdimm: infras... |
1663 1664 |
"host (%s) vs claim (%s) mismatch ", |
0bfb8dd3e libnvdimm: cleanu... |
1665 |
dev_name(dev), |
8c2f7e865 libnvdimm: infras... |
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 |
dev_name(ndns->claim))) return ERR_PTR(-ENXIO); } else { ndns = to_ndns(dev); if (ndns->claim) { dev_dbg(dev, "claimed by %s, failing probe ", 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 ", &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); |
bd26d0d0c nvdimm: improve d... |
1691 |
if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
8c2f7e865 libnvdimm: infras... |
1692 |
return ERR_PTR(-ENODEV); |
8c2f7e865 libnvdimm: infras... |
1693 |
} else if (is_namespace_blk(&ndns->dev)) { |
047fc8a1f libnvdimm, nfit, ... |
1694 1695 1696 |
struct nd_namespace_blk *nsblk; nsblk = to_nd_namespace_blk(&ndns->dev); |
bd26d0d0c nvdimm: improve d... |
1697 1698 1699 1700 1701 1702 1703 1704 |
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 ", __func__); return ERR_PTR(-ENODEV); } |
047fc8a1f libnvdimm, nfit, ... |
1705 1706 |
if (!nd_namespace_blk_validate(nsblk)) return ERR_PTR(-ENODEV); |
8c2f7e865 libnvdimm: infras... |
1707 1708 1709 1710 1711 |
} return ndns; } EXPORT_SYMBOL(nvdimm_namespace_common_probe); |
3d88002e4 libnvdimm: suppor... |
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 |
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; } |
8c2f7e865 libnvdimm: infras... |
1727 |
dev = &nsio->common.dev; |
3d88002e4 libnvdimm: suppor... |
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 |
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; } |
bf9bccc14 libnvdimm: pmem l... |
1739 1740 1741 1742 1743 1744 1745 1746 |
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]; |
faec6f8a1 libnvdimm, label:... |
1747 1748 |
struct nd_interleave_set *nd_set = nd_region->nd_set; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f18 libnvdimm, label:... |
1749 |
struct nd_label_ent *label_ent; |
bf9bccc14 libnvdimm: pmem l... |
1750 |
bool found_uuid = false; |
bf9bccc14 libnvdimm: pmem l... |
1751 |
|
ae8219f18 libnvdimm, label:... |
1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 |
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); |
bf9bccc14 libnvdimm: pmem l... |
1762 1763 1764 1765 1766 1767 |
if (isetcookie != cookie) continue; if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) continue; |
faec6f8a1 libnvdimm, label:... |
1768 1769 1770 1771 1772 1773 1774 1775 1776 |
if (namespace_label_has(ndd, type_guid) && !guid_equal(&nd_set->type_guid, &nd_label->type_guid)) { dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb ", nd_set->type_guid.b, nd_label->type_guid.b); continue; } |
bf9bccc14 libnvdimm: pmem l... |
1777 |
if (found_uuid) { |
faec6f8a1 libnvdimm, label:... |
1778 |
dev_dbg(ndd->dev, |
bf9bccc14 libnvdimm: pmem l... |
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 |
"%s duplicate entry for uuid ", __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) { |
bf9bccc14 libnvdimm: pmem l... |
1800 1801 1802 1803 1804 1805 1806 |
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]; |
0e3b0d123 libnvdimm, namesp... |
1807 |
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f18 libnvdimm, label:... |
1808 |
struct nd_namespace_label *nd_label = NULL; |
bf9bccc14 libnvdimm: pmem l... |
1809 |
u64 hw_start, hw_end, pmem_start, pmem_end; |
ae8219f18 libnvdimm, label:... |
1810 |
struct nd_label_ent *label_ent; |
bf9bccc14 libnvdimm: pmem l... |
1811 |
|
9cf8bd529 libnvdimm: replac... |
1812 |
lockdep_assert_held(&nd_mapping->lock); |
ae8219f18 libnvdimm, label:... |
1813 1814 1815 1816 |
list_for_each_entry(label_ent, &nd_mapping->labels, list) { nd_label = label_ent->label; if (!nd_label) continue; |
bf9bccc14 libnvdimm: pmem l... |
1817 1818 |
if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) break; |
ae8219f18 libnvdimm, label:... |
1819 1820 |
nd_label = NULL; } |
bf9bccc14 libnvdimm: pmem l... |
1821 1822 1823 1824 1825 |
if (!nd_label) { WARN_ON(1); return -EINVAL; } |
bf9bccc14 libnvdimm: pmem l... |
1826 1827 1828 1829 1830 1831 |
/* * 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; |
ae8219f18 libnvdimm, label:... |
1832 1833 |
pmem_start = __le64_to_cpu(nd_label->dpa); pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize); |
0e3b0d123 libnvdimm, namesp... |
1834 1835 |
if (pmem_start >= hw_start && pmem_start < hw_end && pmem_end <= hw_end && pmem_end > hw_start) |
bf9bccc14 libnvdimm: pmem l... |
1836 |
/* pass */; |
0e3b0d123 libnvdimm, namesp... |
1837 1838 1839 1840 |
else { dev_dbg(&nd_region->dev, "%s invalid label for %pUb ", dev_name(ndd->dev), nd_label->uuid); |
bf9bccc14 libnvdimm: pmem l... |
1841 |
return -EINVAL; |
0e3b0d123 libnvdimm, namesp... |
1842 |
} |
bf9bccc14 libnvdimm: pmem l... |
1843 |
|
8a5f50d3b libnvdimm, namesp... |
1844 1845 |
/* move recently validated label to the front of the list */ list_move(&label_ent->list, &nd_mapping->labels); |
bf9bccc14 libnvdimm: pmem l... |
1846 1847 1848 1849 1850 |
} return 0; } /** |
8a5f50d3b libnvdimm, namesp... |
1851 |
* create_namespace_pmem - validate interleave set labelling, retrieve label0 |
bf9bccc14 libnvdimm: pmem l... |
1852 |
* @nd_region: region with mappings to validate |
8a5f50d3b libnvdimm, namesp... |
1853 1854 |
* @nspm: target namespace to create * @nd_label: target pmem namespace label to evaluate |
bf9bccc14 libnvdimm: pmem l... |
1855 |
*/ |
8a5f50d3b libnvdimm, namesp... |
1856 |
struct device *create_namespace_pmem(struct nd_region *nd_region, |
c12c48ce8 libnvdimm, label:... |
1857 |
struct nd_namespace_index *nsindex, |
8a5f50d3b libnvdimm, namesp... |
1858 |
struct nd_namespace_label *nd_label) |
bf9bccc14 libnvdimm: pmem l... |
1859 |
{ |
c12c48ce8 libnvdimm, label:... |
1860 |
u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
86ef58a4e nfit, libnvdimm: ... |
1861 |
u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
ae8219f18 libnvdimm, label:... |
1862 |
struct nd_label_ent *label_ent; |
8a5f50d3b libnvdimm, namesp... |
1863 |
struct nd_namespace_pmem *nspm; |
ae8219f18 libnvdimm, label:... |
1864 |
struct nd_mapping *nd_mapping; |
bf9bccc14 libnvdimm: pmem l... |
1865 |
resource_size_t size = 0; |
8a5f50d3b libnvdimm, namesp... |
1866 1867 |
struct resource *res; struct device *dev; |
ae8219f18 libnvdimm, label:... |
1868 |
int rc = 0; |
bf9bccc14 libnvdimm: pmem l... |
1869 |
u16 i; |
4765218db libnvdimm, namesp... |
1870 1871 1872 |
if (cookie == 0) { dev_dbg(&nd_region->dev, "invalid interleave-set-cookie "); |
8a5f50d3b libnvdimm, namesp... |
1873 |
return ERR_PTR(-ENXIO); |
4765218db libnvdimm, namesp... |
1874 |
} |
bf9bccc14 libnvdimm: pmem l... |
1875 |
|
8a5f50d3b libnvdimm, namesp... |
1876 1877 1878 1879 |
if (__le64_to_cpu(nd_label->isetcookie) != cookie) { dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb ", nd_label->uuid); |
86ef58a4e nfit, libnvdimm: ... |
1880 1881 1882 1883 1884 1885 |
if (__le64_to_cpu(nd_label->isetcookie) != altcookie) return ERR_PTR(-EAGAIN); dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb ", nd_label->uuid); |
ae8219f18 libnvdimm, label:... |
1886 |
} |
bf9bccc14 libnvdimm: pmem l... |
1887 |
|
8a5f50d3b libnvdimm, namesp... |
1888 1889 1890 |
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); if (!nspm) return ERR_PTR(-ENOMEM); |
ae8219f18 libnvdimm, label:... |
1891 |
|
0e3b0d123 libnvdimm, namesp... |
1892 |
nspm->id = -1; |
8a5f50d3b libnvdimm, namesp... |
1893 1894 1895 1896 1897 1898 |
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; |
ae8219f18 libnvdimm, label:... |
1899 |
|
86ef58a4e nfit, libnvdimm: ... |
1900 1901 1902 1903 1904 1905 1906 |
for (i = 0; i < nd_region->ndr_mappings; i++) { if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) continue; if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i)) continue; break; } |
8a5f50d3b libnvdimm, namesp... |
1907 |
if (i < nd_region->ndr_mappings) { |
b68b77c93 libnvdimm, namesp... |
1908 |
struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
0e3b0d123 libnvdimm, namesp... |
1909 |
|
8a5f50d3b libnvdimm, namesp... |
1910 1911 1912 1913 1914 |
/* * 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. */ |
0e3b0d123 libnvdimm, namesp... |
1915 1916 |
dev_err(&nd_region->dev, "%s missing label for %pUb ", |
b68b77c93 libnvdimm, namesp... |
1917 |
nvdimm_name(nvdimm), nd_label->uuid); |
8a5f50d3b libnvdimm, namesp... |
1918 |
rc = -EINVAL; |
ae8219f18 libnvdimm, label:... |
1919 |
goto err; |
8a5f50d3b libnvdimm, namesp... |
1920 |
} |
bf9bccc14 libnvdimm: pmem l... |
1921 1922 1923 1924 1925 1926 1927 1928 1929 |
/* * 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). */ |
8a5f50d3b libnvdimm, namesp... |
1930 |
rc = select_pmem_id(nd_region, nd_label->uuid); |
bf9bccc14 libnvdimm: pmem l... |
1931 1932 1933 1934 1935 |
if (rc) goto err; /* Calculate total size and populate namespace properties from label0 */ for (i = 0; i < nd_region->ndr_mappings; i++) { |
ae8219f18 libnvdimm, label:... |
1936 |
struct nd_namespace_label *label0; |
b3fde74ea libnvdimm, label:... |
1937 |
struct nvdimm_drvdata *ndd; |
ae8219f18 libnvdimm, label:... |
1938 1939 |
nd_mapping = &nd_region->mapping[i]; |
ae8219f18 libnvdimm, label:... |
1940 1941 1942 |
label_ent = list_first_entry_or_null(&nd_mapping->labels, typeof(*label_ent), list); label0 = label_ent ? label_ent->label : 0; |
ae8219f18 libnvdimm, label:... |
1943 1944 1945 1946 1947 |
if (!label0) { WARN_ON(1); continue; } |
bf9bccc14 libnvdimm: pmem l... |
1948 1949 1950 1951 1952 1953 1954 1955 1956 |
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); |
f979b13c3 libnvdimm, label:... |
1957 |
nspm->lbasize = __le64_to_cpu(label0->lbasize); |
b3fde74ea libnvdimm, label:... |
1958 1959 1960 1961 |
ndd = to_ndd(nd_mapping); if (namespace_label_has(ndd, abstraction_guid)) nspm->nsio.common.claim_class = to_nvdimm_cclass(&label0->abstraction_guid); |
bf9bccc14 libnvdimm: pmem l... |
1962 1963 1964 1965 1966 1967 |
} if (!nspm->alt_name || !nspm->uuid) { rc = -ENOMEM; goto err; } |
0e3b0d123 libnvdimm, namesp... |
1968 |
nd_namespace_pmem_set_resource(nd_region, nspm, size); |
bf9bccc14 libnvdimm: pmem l... |
1969 |
|
8a5f50d3b libnvdimm, namesp... |
1970 |
return dev; |
bf9bccc14 libnvdimm: pmem l... |
1971 |
err: |
8a5f50d3b libnvdimm, namesp... |
1972 |
namespace_pmem_release(dev); |
bf9bccc14 libnvdimm: pmem l... |
1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 |
switch (rc) { case -EINVAL: dev_dbg(&nd_region->dev, "%s: invalid label(s) ", __func__); break; case -ENODEV: dev_dbg(&nd_region->dev, "%s: label not found ", __func__); break; default: dev_dbg(&nd_region->dev, "%s: unexpected err: %d ", __func__, rc); break; } |
8a5f50d3b libnvdimm, namesp... |
1988 |
return ERR_PTR(rc); |
bf9bccc14 libnvdimm: pmem l... |
1989 |
} |
1b40e09a1 libnvdimm: blk la... |
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 |
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; |
8c2f7e865 libnvdimm: infras... |
2024 |
dev = &nsblk->common.dev; |
1b40e09a1 libnvdimm: blk la... |
2025 2026 2027 2028 2029 2030 2031 2032 2033 |
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; |
8c2f7e865 libnvdimm: infras... |
2034 |
return &nsblk->common.dev; |
1b40e09a1 libnvdimm: blk la... |
2035 |
} |
98a29c39d libnvdimm, namesp... |
2036 2037 2038 2039 2040 |
static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) { struct nd_namespace_pmem *nspm; struct resource *res; struct device *dev; |
c9e582aa6 libnvdimm, nfit: ... |
2041 |
if (!is_memory(&nd_region->dev)) |
98a29c39d libnvdimm, namesp... |
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 |
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) |
1b40e09a1 libnvdimm: blk la... |
2069 2070 |
{ WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
98a29c39d libnvdimm, namesp... |
2071 2072 2073 2074 2075 2076 2077 2078 |
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); |
1b40e09a1 libnvdimm: blk la... |
2079 2080 2081 2082 2083 |
/* * Seed creation failures are not fatal, provisioning is simply * disabled until memory becomes available */ if (!nd_region->ns_seed) |
98a29c39d libnvdimm, namesp... |
2084 2085 2086 |
dev_err(&nd_region->dev, "failed to create %s namespace ", is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); |
1b40e09a1 libnvdimm: blk la... |
2087 2088 2089 |
else nd_device_register(nd_region->ns_seed); } |
cd03412a5 libnvdimm, dax: i... |
2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 |
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 "); } |
2dc43331e libnvdimm, pfn: f... |
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 |
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 "); } |
8c2f7e865 libnvdimm: infras... |
2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 |
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 "); } |
8a5f50d3b libnvdimm, namesp... |
2126 2127 2128 |
static int add_namespace_resource(struct nd_region *nd_region, struct nd_namespace_label *nd_label, struct device **devs, int count) |
1b40e09a1 libnvdimm: blk la... |
2129 |
{ |
8a5f50d3b libnvdimm, namesp... |
2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 |
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 ", count); } else { dev_err(&nd_region->dev, "error: conflicting extents for uuid: %pUb ", 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]; |
faec6f8a1 libnvdimm, label:... |
2171 |
struct nd_interleave_set *nd_set = nd_region->nd_set; |
ae8219f18 libnvdimm, label:... |
2172 |
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1b40e09a1 libnvdimm: blk la... |
2173 |
struct nd_namespace_blk *nsblk; |
238b323a6 libnvdimm, namesp... |
2174 |
char name[NSLABEL_NAME_LEN]; |
8a5f50d3b libnvdimm, namesp... |
2175 2176 |
struct device *dev = NULL; struct resource *res; |
8f2bc2430 libnvdimm, label:... |
2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 |
if (namespace_label_has(ndd, type_guid)) { if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) { dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb ", nd_set->type_guid.b, nd_label->type_guid.b); return ERR_PTR(-EAGAIN); } if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) { dev_dbg(ndd->dev, "expect cookie %#llx got %#llx ", nd_set->cookie2, __le64_to_cpu(nd_label->isetcookie)); return ERR_PTR(-EAGAIN); } |
faec6f8a1 libnvdimm, label:... |
2193 |
} |
8a5f50d3b libnvdimm, namesp... |
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 |
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); |
b3fde74ea libnvdimm, label:... |
2204 2205 2206 |
if (namespace_label_has(ndd, abstraction_guid)) nsblk->common.claim_class = to_nvdimm_cclass(&nd_label->abstraction_guid); |
8a5f50d3b libnvdimm, namesp... |
2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 |
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 ", count); return dev; blk_err: namespace_blk_release(dev); return ERR_PTR(-ENXIO); } |
6ff3e912d libnvdimm, namesp... |
2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 |
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)); } |
8a5f50d3b libnvdimm, namesp... |
2248 2249 |
static struct device **scan_labels(struct nd_region *nd_region) { |
c969e24c1 libnvdimm, namesp... |
2250 |
int i, count = 0; |
8a5f50d3b libnvdimm, namesp... |
2251 2252 |
struct device *dev, **devs = NULL; struct nd_label_ent *label_ent, *e; |
c969e24c1 libnvdimm, namesp... |
2253 2254 |
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; |
1b40e09a1 libnvdimm: blk la... |
2255 |
|
8a5f50d3b libnvdimm, namesp... |
2256 2257 |
/* "safe" because create_namespace_pmem() might list_move() label_ent */ list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { |
ae8219f18 libnvdimm, label:... |
2258 |
struct nd_namespace_label *nd_label = label_ent->label; |
1b40e09a1 libnvdimm: blk la... |
2259 |
struct device **__devs; |
ae8219f18 libnvdimm, label:... |
2260 |
u32 flags; |
1b40e09a1 libnvdimm: blk la... |
2261 |
|
ae8219f18 libnvdimm, label:... |
2262 2263 2264 |
if (!nd_label) continue; flags = __le32_to_cpu(nd_label->flags); |
8a5f50d3b libnvdimm, namesp... |
2265 2266 2267 |
if (is_nd_blk(&nd_region->dev) == !!(flags & NSLABEL_FLAG_LOCAL)) /* pass, region matches label type */; |
1b40e09a1 libnvdimm: blk la... |
2268 2269 |
else continue; |
c969e24c1 libnvdimm, namesp... |
2270 2271 2272 |
/* skip labels that describe extents outside of the region */ if (nd_label->dpa < nd_mapping->start || nd_label->dpa > map_end) continue; |
8a5f50d3b libnvdimm, namesp... |
2273 2274 2275 |
i = add_namespace_resource(nd_region, nd_label, devs, count); if (i < 0) goto err; |
1b40e09a1 libnvdimm: blk la... |
2276 2277 2278 2279 2280 2281 2282 2283 |
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; |
faec6f8a1 libnvdimm, label:... |
2284 |
if (is_nd_blk(&nd_region->dev)) |
8a5f50d3b libnvdimm, namesp... |
2285 |
dev = create_namespace_blk(nd_region, nd_label, count); |
faec6f8a1 libnvdimm, label:... |
2286 |
else { |
c12c48ce8 libnvdimm, label:... |
2287 2288 2289 2290 2291 |
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct nd_namespace_index *nsindex; nsindex = to_namespace_index(ndd, ndd->ns_current); dev = create_namespace_pmem(nd_region, nsindex, nd_label); |
8a5f50d3b libnvdimm, namesp... |
2292 |
} |
faec6f8a1 libnvdimm, label:... |
2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 |
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; |
1b40e09a1 libnvdimm: blk la... |
2307 |
} |
8a5f50d3b libnvdimm, namesp... |
2308 2309 2310 2311 |
dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s ", __func__, count, is_nd_blk(&nd_region->dev) ? "blk" : "pmem", count == 1 ? "" : "s"); |
1b40e09a1 libnvdimm: blk la... |
2312 2313 2314 |
if (count == 0) { /* Publish a zero-sized namespace for userspace to configure. */ |
ae8219f18 libnvdimm, label:... |
2315 |
nd_mapping_free_labels(nd_mapping); |
1b40e09a1 libnvdimm: blk la... |
2316 2317 2318 2319 |
devs = kcalloc(2, sizeof(dev), GFP_KERNEL); if (!devs) goto err; |
8a5f50d3b libnvdimm, namesp... |
2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 |
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; |
0e3b0d123 libnvdimm, namesp... |
2336 |
nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
8a5f50d3b libnvdimm, namesp... |
2337 |
} |
1b40e09a1 libnvdimm: blk la... |
2338 2339 |
dev->parent = &nd_region->dev; devs[count++] = dev; |
c9e582aa6 libnvdimm, nfit: ... |
2340 |
} else if (is_memory(&nd_region->dev)) { |
8a5f50d3b libnvdimm, namesp... |
2341 2342 |
/* clean unselected labels */ for (i = 0; i < nd_region->ndr_mappings; i++) { |
0e3b0d123 libnvdimm, namesp... |
2343 2344 2345 |
struct list_head *l, *e; LIST_HEAD(list); int j; |
8a5f50d3b libnvdimm, namesp... |
2346 2347 2348 2349 2350 |
nd_mapping = &nd_region->mapping[i]; if (list_empty(&nd_mapping->labels)) { WARN_ON(1); continue; } |
0e3b0d123 libnvdimm, namesp... |
2351 2352 2353 2354 2355 2356 2357 |
j = count; list_for_each_safe(l, e, &nd_mapping->labels) { if (!j--) break; list_move_tail(l, &list); } |
8a5f50d3b libnvdimm, namesp... |
2358 |
nd_mapping_free_labels(nd_mapping); |
0e3b0d123 libnvdimm, namesp... |
2359 |
list_splice_init(&list, &nd_mapping->labels); |
8a5f50d3b libnvdimm, namesp... |
2360 |
} |
1b40e09a1 libnvdimm: blk la... |
2361 |
} |
6ff3e912d libnvdimm, namesp... |
2362 2363 |
if (count > 1) sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); |
1b40e09a1 libnvdimm: blk la... |
2364 |
return devs; |
ae8219f18 libnvdimm, label:... |
2365 |
err: |
75d29713b libnvdimm, namesp... |
2366 2367 2368 2369 2370 2371 2372 2373 |
if (devs) { for (i = 0; devs[i]; i++) if (is_nd_blk(&nd_region->dev)) namespace_blk_release(devs[i]); else namespace_pmem_release(devs[i]); kfree(devs); } |
1b40e09a1 libnvdimm: blk la... |
2374 2375 |
return NULL; } |
8a5f50d3b libnvdimm, namesp... |
2376 |
static struct device **create_namespaces(struct nd_region *nd_region) |
ae8219f18 libnvdimm, label:... |
2377 2378 2379 |
{ struct nd_mapping *nd_mapping = &nd_region->mapping[0]; struct device **devs; |
8a5f50d3b libnvdimm, namesp... |
2380 |
int i; |
ae8219f18 libnvdimm, label:... |
2381 2382 2383 |
if (nd_region->ndr_mappings == 0) return NULL; |
8a5f50d3b libnvdimm, namesp... |
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 |
/* 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); } |
ae8219f18 libnvdimm, label:... |
2398 2399 2400 |
return devs; } |
bf9bccc14 libnvdimm: pmem l... |
2401 2402 2403 2404 2405 2406 2407 2408 |
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; |
ae8219f18 libnvdimm, label:... |
2409 |
struct nd_label_ent *label_ent; |
bf9bccc14 libnvdimm: pmem l... |
2410 2411 2412 |
int count, j; /* |
9d62ed965 libnvdimm: handle... |
2413 2414 |
* If the dimm is disabled then we may need to prevent * the region from being activated. |
bf9bccc14 libnvdimm: pmem l... |
2415 2416 |
*/ if (!ndd) { |
9d62ed965 libnvdimm: handle... |
2417 2418 2419 2420 2421 |
if (test_bit(NDD_LOCKED, &nvdimm->flags)) /* fail, label data may be unreadable */; else if (test_bit(NDD_ALIASING, &nvdimm->flags)) /* fail, labels needed to disambiguate dpa */; else |
bf9bccc14 libnvdimm: pmem l... |
2422 |
return 0; |
9d62ed965 libnvdimm: handle... |
2423 2424 2425 2426 2427 2428 |
dev_err(&nd_region->dev, "%s: is %s, failing probe ", dev_name(&nd_mapping->nvdimm->dev), test_bit(NDD_LOCKED, &nvdimm->flags) ? "locked" : "disabled"); |
bf9bccc14 libnvdimm: pmem l... |
2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 |
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 ", __func__, count); if (!count) continue; |
bf9bccc14 libnvdimm: pmem l... |
2440 2441 |
for (j = 0; j < count; j++) { struct nd_namespace_label *label; |
ae8219f18 libnvdimm, label:... |
2442 2443 2444 |
label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); if (!label_ent) break; |
bf9bccc14 libnvdimm: pmem l... |
2445 |
label = nd_label_active(ndd, j); |
ae8219f18 libnvdimm, label:... |
2446 2447 2448 2449 2450 |
label_ent->label = label; mutex_lock(&nd_mapping->lock); list_add_tail(&label_ent->list, &nd_mapping->labels); mutex_unlock(&nd_mapping->lock); |
bf9bccc14 libnvdimm: pmem l... |
2451 |
} |
ae8219f18 libnvdimm, label:... |
2452 2453 2454 2455 2456 2457 2458 2459 |
if (j >= count) continue; mutex_lock(&nd_mapping->lock); nd_mapping_free_labels(nd_mapping); mutex_unlock(&nd_mapping->lock); return -ENOMEM; |
bf9bccc14 libnvdimm: pmem l... |
2460 2461 2462 2463 |
} return 0; } |
3d88002e4 libnvdimm: suppor... |
2464 2465 2466 |
int nd_region_register_namespaces(struct nd_region *nd_region, int *err) { struct device **devs = NULL; |
bf9bccc14 libnvdimm: pmem l... |
2467 |
int i, rc = 0, type; |
3d88002e4 libnvdimm: suppor... |
2468 2469 |
*err = 0; |
bf9bccc14 libnvdimm: pmem l... |
2470 2471 2472 2473 2474 2475 2476 2477 2478 |
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) { |
3d88002e4 libnvdimm: suppor... |
2479 2480 2481 |
case ND_DEVICE_NAMESPACE_IO: devs = create_namespace_io(nd_region); break; |
bf9bccc14 libnvdimm: pmem l... |
2482 |
case ND_DEVICE_NAMESPACE_PMEM: |
1b40e09a1 libnvdimm: blk la... |
2483 |
case ND_DEVICE_NAMESPACE_BLK: |
8a5f50d3b libnvdimm, namesp... |
2484 |
devs = create_namespaces(nd_region); |
1b40e09a1 libnvdimm: blk la... |
2485 |
break; |
3d88002e4 libnvdimm: suppor... |
2486 2487 2488 |
default: break; } |
bf9bccc14 libnvdimm: pmem l... |
2489 |
nvdimm_bus_unlock(&nd_region->dev); |
3d88002e4 libnvdimm: suppor... |
2490 2491 2492 2493 2494 2495 |
if (!devs) return -ENODEV; for (i = 0; devs[i]; i++) { struct device *dev = devs[i]; |
1b40e09a1 libnvdimm: blk la... |
2496 |
int id; |
3d88002e4 libnvdimm: suppor... |
2497 |
|
1b40e09a1 libnvdimm: blk la... |
2498 2499 2500 2501 2502 2503 2504 |
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; |
0e3b0d123 libnvdimm, namesp... |
2505 2506 2507 2508 2509 2510 2511 |
} 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; |
1b40e09a1 libnvdimm: blk la... |
2512 2513 2514 2515 2516 2517 |
} else id = i; if (id < 0) break; dev_set_name(dev, "namespace%d.%d", nd_region->id, id); |
3d88002e4 libnvdimm: suppor... |
2518 2519 2520 |
dev->groups = nd_namespace_attribute_groups; nd_device_register(dev); } |
1b40e09a1 libnvdimm: blk la... |
2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 |
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; } |
3d88002e4 libnvdimm: suppor... |
2541 |
kfree(devs); |
1b40e09a1 libnvdimm: blk la... |
2542 2543 |
if (rc == -ENODEV) return rc; |
3d88002e4 libnvdimm: suppor... |
2544 2545 |
return i; } |