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2660 lines
67 KiB
2660 lines
67 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
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*/ |
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#include <linux/module.h> |
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#include <linux/device.h> |
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#include <linux/sort.h> |
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#include <linux/slab.h> |
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#include <linux/list.h> |
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#include <linux/nd.h> |
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#include "nd-core.h" |
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#include "pmem.h" |
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#include "pfn.h" |
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#include "nd.h" |
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|
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static void namespace_io_release(struct device *dev) |
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{ |
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struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
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|
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kfree(nsio); |
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} |
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|
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static void namespace_pmem_release(struct device *dev) |
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{ |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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|
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if (nspm->id >= 0) |
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ida_simple_remove(&nd_region->ns_ida, nspm->id); |
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kfree(nspm->alt_name); |
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kfree(nspm->uuid); |
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kfree(nspm); |
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} |
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|
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static void namespace_blk_release(struct device *dev) |
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{ |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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|
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if (nsblk->id >= 0) |
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ida_simple_remove(&nd_region->ns_ida, nsblk->id); |
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kfree(nsblk->alt_name); |
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kfree(nsblk->uuid); |
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kfree(nsblk->res); |
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kfree(nsblk); |
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} |
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|
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static bool is_namespace_pmem(const struct device *dev); |
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static bool is_namespace_blk(const struct device *dev); |
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static bool is_namespace_io(const struct device *dev); |
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|
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static int is_uuid_busy(struct device *dev, void *data) |
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{ |
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u8 *uuid1 = data, *uuid2 = NULL; |
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|
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if (is_namespace_pmem(dev)) { |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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|
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uuid2 = nspm->uuid; |
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} else if (is_namespace_blk(dev)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
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|
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uuid2 = nsblk->uuid; |
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} else if (is_nd_btt(dev)) { |
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struct nd_btt *nd_btt = to_nd_btt(dev); |
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|
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uuid2 = nd_btt->uuid; |
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} else if (is_nd_pfn(dev)) { |
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struct nd_pfn *nd_pfn = to_nd_pfn(dev); |
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|
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uuid2 = nd_pfn->uuid; |
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} |
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|
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if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0) |
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return -EBUSY; |
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|
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return 0; |
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} |
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|
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static int is_namespace_uuid_busy(struct device *dev, void *data) |
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{ |
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if (is_nd_region(dev)) |
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return device_for_each_child(dev, data, is_uuid_busy); |
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return 0; |
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} |
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|
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/** |
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* nd_is_uuid_unique - verify that no other namespace has @uuid |
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* @dev: any device on a nvdimm_bus |
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* @uuid: uuid to check |
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*/ |
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bool nd_is_uuid_unique(struct device *dev, u8 *uuid) |
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{ |
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struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); |
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|
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if (!nvdimm_bus) |
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return false; |
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WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); |
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if (device_for_each_child(&nvdimm_bus->dev, uuid, |
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is_namespace_uuid_busy) != 0) |
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return false; |
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return true; |
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} |
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|
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bool pmem_should_map_pages(struct device *dev) |
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{ |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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struct nd_namespace_common *ndns = to_ndns(dev); |
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struct nd_namespace_io *nsio; |
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|
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if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) |
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return false; |
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|
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if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) |
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return false; |
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|
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if (is_nd_pfn(dev) || is_nd_btt(dev)) |
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return false; |
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|
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if (ndns->force_raw) |
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return false; |
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|
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nsio = to_nd_namespace_io(dev); |
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if (region_intersects(nsio->res.start, resource_size(&nsio->res), |
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IORESOURCE_SYSTEM_RAM, |
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IORES_DESC_NONE) == REGION_MIXED) |
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return false; |
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|
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return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
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} |
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EXPORT_SYMBOL(pmem_should_map_pages); |
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|
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unsigned int pmem_sector_size(struct nd_namespace_common *ndns) |
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{ |
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if (is_namespace_pmem(&ndns->dev)) { |
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struct nd_namespace_pmem *nspm; |
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|
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nspm = to_nd_namespace_pmem(&ndns->dev); |
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if (nspm->lbasize == 0 || nspm->lbasize == 512) |
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/* default */; |
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else if (nspm->lbasize == 4096) |
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return 4096; |
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else |
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dev_WARN(&ndns->dev, "unsupported sector size: %ld\n", |
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nspm->lbasize); |
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} |
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|
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/* |
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* There is no namespace label (is_namespace_io()), or the label |
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* indicates the default sector size. |
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*/ |
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return 512; |
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} |
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EXPORT_SYMBOL(pmem_sector_size); |
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|
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const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
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char *name) |
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{ |
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struct nd_region *nd_region = to_nd_region(ndns->dev.parent); |
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const char *suffix = NULL; |
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|
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if (ndns->claim && is_nd_btt(ndns->claim)) |
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suffix = "s"; |
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|
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if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
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int nsidx = 0; |
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|
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if (is_namespace_pmem(&ndns->dev)) { |
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struct nd_namespace_pmem *nspm; |
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|
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nspm = to_nd_namespace_pmem(&ndns->dev); |
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nsidx = nspm->id; |
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} |
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|
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if (nsidx) |
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sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, |
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suffix ? suffix : ""); |
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else |
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sprintf(name, "pmem%d%s", nd_region->id, |
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suffix ? suffix : ""); |
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} else if (is_namespace_blk(&ndns->dev)) { |
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struct nd_namespace_blk *nsblk; |
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|
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nsblk = to_nd_namespace_blk(&ndns->dev); |
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sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
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suffix ? suffix : ""); |
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} else { |
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return NULL; |
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} |
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|
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return name; |
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} |
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EXPORT_SYMBOL(nvdimm_namespace_disk_name); |
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|
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const u8 *nd_dev_to_uuid(struct device *dev) |
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{ |
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static const u8 null_uuid[16]; |
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|
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if (!dev) |
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return null_uuid; |
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|
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if (is_namespace_pmem(dev)) { |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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return nspm->uuid; |
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} else if (is_namespace_blk(dev)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
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|
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return nsblk->uuid; |
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} else |
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return null_uuid; |
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} |
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EXPORT_SYMBOL(nd_dev_to_uuid); |
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static ssize_t nstype_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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|
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return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); |
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} |
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static DEVICE_ATTR_RO(nstype); |
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|
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static ssize_t __alt_name_store(struct device *dev, const char *buf, |
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const size_t len) |
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{ |
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char *input, *pos, *alt_name, **ns_altname; |
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ssize_t rc; |
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|
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if (is_namespace_pmem(dev)) { |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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|
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ns_altname = &nspm->alt_name; |
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} else if (is_namespace_blk(dev)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
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|
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ns_altname = &nsblk->alt_name; |
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} else |
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return -ENXIO; |
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|
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if (dev->driver || to_ndns(dev)->claim) |
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return -EBUSY; |
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|
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input = kstrndup(buf, len, GFP_KERNEL); |
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if (!input) |
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return -ENOMEM; |
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|
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pos = strim(input); |
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if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { |
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rc = -EINVAL; |
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goto out; |
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} |
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|
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alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); |
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if (!alt_name) { |
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rc = -ENOMEM; |
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goto out; |
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} |
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kfree(*ns_altname); |
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*ns_altname = alt_name; |
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sprintf(*ns_altname, "%s", pos); |
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rc = len; |
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|
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out: |
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kfree(input); |
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return rc; |
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} |
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static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
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{ |
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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]; |
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
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struct nd_label_id label_id; |
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resource_size_t size = 0; |
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struct resource *res; |
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if (!nsblk->uuid) |
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return 0; |
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nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
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for_each_dpa_resource(ndd, res) |
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if (strcmp(res->name, label_id.id) == 0) |
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size += resource_size(res); |
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return size; |
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} |
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static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
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{ |
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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]; |
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
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struct nd_label_id label_id; |
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struct resource *res; |
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int count, i; |
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if (!nsblk->uuid || !nsblk->lbasize || !ndd) |
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return false; |
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count = 0; |
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nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
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for_each_dpa_resource(ndd, res) { |
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if (strcmp(res->name, label_id.id) != 0) |
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continue; |
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/* |
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* Resources with unacknowledged adjustments indicate a |
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* failure to update labels |
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*/ |
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if (res->flags & DPA_RESOURCE_ADJUSTED) |
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return false; |
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count++; |
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} |
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|
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/* These values match after a successful label update */ |
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if (count != nsblk->num_resources) |
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return false; |
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for (i = 0; i < nsblk->num_resources; i++) { |
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struct resource *found = NULL; |
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|
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for_each_dpa_resource(ndd, res) |
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if (res == nsblk->res[i]) { |
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found = res; |
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break; |
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} |
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/* stale resource */ |
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if (!found) |
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return false; |
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} |
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|
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return true; |
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} |
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resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
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{ |
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resource_size_t size; |
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nvdimm_bus_lock(&nsblk->common.dev); |
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size = __nd_namespace_blk_validate(nsblk); |
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nvdimm_bus_unlock(&nsblk->common.dev); |
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return size; |
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} |
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EXPORT_SYMBOL(nd_namespace_blk_validate); |
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static int nd_namespace_label_update(struct nd_region *nd_region, |
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struct device *dev) |
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{ |
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dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
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"namespace must be idle during label update\n"); |
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if (dev->driver || to_ndns(dev)->claim) |
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return 0; |
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|
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/* |
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* Only allow label writes that will result in a valid namespace |
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* or deletion of an existing namespace. |
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*/ |
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if (is_namespace_pmem(dev)) { |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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resource_size_t size = resource_size(&nspm->nsio.res); |
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|
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if (size == 0 && nspm->uuid) |
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/* delete allocation */; |
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else if (!nspm->uuid) |
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return 0; |
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|
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return nd_pmem_namespace_label_update(nd_region, nspm, size); |
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} else if (is_namespace_blk(dev)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
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resource_size_t size = nd_namespace_blk_size(nsblk); |
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|
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if (size == 0 && nsblk->uuid) |
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/* delete allocation */; |
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else if (!nsblk->uuid || !nsblk->lbasize) |
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return 0; |
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|
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return nd_blk_namespace_label_update(nd_region, nsblk, size); |
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} else |
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return -ENXIO; |
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} |
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|
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static ssize_t alt_name_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, size_t len) |
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{ |
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struct nd_region *nd_region = to_nd_region(dev->parent); |
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ssize_t rc; |
|
|
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nd_device_lock(dev); |
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nvdimm_bus_lock(dev); |
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wait_nvdimm_bus_probe_idle(dev); |
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rc = __alt_name_store(dev, buf, len); |
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if (rc >= 0) |
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rc = nd_namespace_label_update(nd_region, dev); |
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dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
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nvdimm_bus_unlock(dev); |
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nd_device_unlock(dev); |
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|
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return rc < 0 ? rc : len; |
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} |
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|
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static ssize_t alt_name_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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char *ns_altname; |
|
|
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if (is_namespace_pmem(dev)) { |
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struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
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|
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ns_altname = nspm->alt_name; |
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} else if (is_namespace_blk(dev)) { |
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
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ns_altname = nsblk->alt_name; |
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} else |
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return -ENXIO; |
|
|
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return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); |
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} |
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static DEVICE_ATTR_RW(alt_name); |
|
|
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static int scan_free(struct nd_region *nd_region, |
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struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
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resource_size_t n) |
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{ |
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bool is_blk = strncmp(label_id->id, "blk", 3) == 0; |
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
int rc = 0; |
|
|
|
while (n) { |
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struct resource *res, *last; |
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resource_size_t new_start; |
|
|
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last = NULL; |
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for_each_dpa_resource(ndd, res) |
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if (strcmp(res->name, label_id->id) == 0) |
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last = res; |
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res = last; |
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if (!res) |
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return 0; |
|
|
|
if (n >= resource_size(res)) { |
|
n -= resource_size(res); |
|
nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); |
|
nvdimm_free_dpa(ndd, res); |
|
/* retry with last resource deleted */ |
|
continue; |
|
} |
|
|
|
/* |
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* Keep BLK allocations relegated to high DPA as much as |
|
* possible |
|
*/ |
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if (is_blk) |
|
new_start = res->start + n; |
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else |
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new_start = res->start; |
|
|
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rc = adjust_resource(res, new_start, resource_size(res) - n); |
|
if (rc == 0) |
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res->flags |= DPA_RESOURCE_ADJUSTED; |
|
nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
|
break; |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
/** |
|
* shrink_dpa_allocation - for each dimm in region free n bytes for label_id |
|
* @nd_region: the set of dimms to reclaim @n bytes from |
|
* @label_id: unique identifier for the namespace consuming this dpa range |
|
* @n: number of bytes per-dimm to release |
|
* |
|
* Assumes resources are ordered. Starting from the end try to |
|
* adjust_resource() the allocation to @n, but if @n is larger than the |
|
* allocation delete it and find the 'new' last allocation in the label |
|
* set. |
|
*/ |
|
static int shrink_dpa_allocation(struct nd_region *nd_region, |
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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 |
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first_dpa = nd_mapping->start; |
|
|
|
/* first resource allocation for this label-id or dimm */ |
|
res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); |
|
if (!res) |
|
rc = -EBUSY; |
|
|
|
nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); |
|
return rc ? n : 0; |
|
} |
|
|
|
|
|
/** |
|
* space_valid() - validate free dpa space against constraints |
|
* @nd_region: hosting region of the free space |
|
* @ndd: dimm device data for debug |
|
* @label_id: namespace id to allocate space |
|
* @prev: potential allocation that precedes free space |
|
* @next: allocation that follows the given free space range |
|
* @exist: first allocation with same id in the mapping |
|
* @n: range that must satisfied for pmem allocations |
|
* @valid: free space range to validate |
|
* |
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* BLK-space is valid as long as it does not precede a PMEM |
|
* allocation in a given region. PMEM-space must be contiguous |
|
* and adjacent to an existing existing allocation (if one |
|
* exists). If reserving PMEM any space is valid. |
|
*/ |
|
static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, |
|
struct nd_label_id *label_id, struct resource *prev, |
|
struct resource *next, struct resource *exist, |
|
resource_size_t n, struct resource *valid) |
|
{ |
|
bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
|
unsigned long align; |
|
|
|
align = nd_region->align / nd_region->ndr_mappings; |
|
valid->start = ALIGN(valid->start, align); |
|
valid->end = ALIGN_DOWN(valid->end + 1, align) - 1; |
|
|
|
if (valid->start >= valid->end) |
|
goto invalid; |
|
|
|
if (is_reserve) |
|
return; |
|
|
|
if (!is_pmem) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
|
struct nvdimm_bus *nvdimm_bus; |
|
struct blk_alloc_info info = { |
|
.nd_mapping = nd_mapping, |
|
.available = nd_mapping->size, |
|
.res = valid, |
|
}; |
|
|
|
WARN_ON(!is_nd_blk(&nd_region->dev)); |
|
nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
|
device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); |
|
return; |
|
} |
|
|
|
/* allocation needs to be contiguous, so this is all or nothing */ |
|
if (resource_size(valid) < n) |
|
goto invalid; |
|
|
|
/* we've got all the space we need and no existing allocation */ |
|
if (!exist) |
|
return; |
|
|
|
/* allocation needs to be contiguous with the existing namespace */ |
|
if (valid->start == exist->end + 1 |
|
|| valid->end == exist->start - 1) |
|
return; |
|
|
|
invalid: |
|
/* truncate @valid size to 0 */ |
|
valid->end = valid->start - 1; |
|
} |
|
|
|
enum alloc_loc { |
|
ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, |
|
}; |
|
|
|
static resource_size_t scan_allocate(struct nd_region *nd_region, |
|
struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
|
resource_size_t n) |
|
{ |
|
resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; |
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct resource *res, *exist = NULL, valid; |
|
const resource_size_t to_allocate = n; |
|
int first; |
|
|
|
for_each_dpa_resource(ndd, res) |
|
if (strcmp(label_id->id, res->name) == 0) |
|
exist = res; |
|
|
|
valid.start = nd_mapping->start; |
|
valid.end = mapping_end; |
|
valid.name = "free space"; |
|
retry: |
|
first = 0; |
|
for_each_dpa_resource(ndd, res) { |
|
struct resource *next = res->sibling, *new_res = NULL; |
|
resource_size_t allocate, available = 0; |
|
enum alloc_loc loc = ALLOC_ERR; |
|
const char *action; |
|
int rc = 0; |
|
|
|
/* ignore resources outside this nd_mapping */ |
|
if (res->start > mapping_end) |
|
continue; |
|
if (res->end < nd_mapping->start) |
|
continue; |
|
|
|
/* space at the beginning of the mapping */ |
|
if (!first++ && res->start > nd_mapping->start) { |
|
valid.start = nd_mapping->start; |
|
valid.end = res->start - 1; |
|
space_valid(nd_region, ndd, label_id, NULL, next, exist, |
|
to_allocate, &valid); |
|
available = resource_size(&valid); |
|
if (available) |
|
loc = ALLOC_BEFORE; |
|
} |
|
|
|
/* space between allocations */ |
|
if (!loc && next) { |
|
valid.start = res->start + resource_size(res); |
|
valid.end = min(mapping_end, next->start - 1); |
|
space_valid(nd_region, ndd, label_id, res, next, exist, |
|
to_allocate, &valid); |
|
available = resource_size(&valid); |
|
if (available) |
|
loc = ALLOC_MID; |
|
} |
|
|
|
/* space at the end of the mapping */ |
|
if (!loc && !next) { |
|
valid.start = res->start + resource_size(res); |
|
valid.end = mapping_end; |
|
space_valid(nd_region, ndd, label_id, res, next, exist, |
|
to_allocate, &valid); |
|
available = resource_size(&valid); |
|
if (available) |
|
loc = ALLOC_AFTER; |
|
} |
|
|
|
if (!loc || !available) |
|
continue; |
|
allocate = min(available, n); |
|
switch (loc) { |
|
case ALLOC_BEFORE: |
|
if (strcmp(res->name, label_id->id) == 0) { |
|
/* adjust current resource up */ |
|
rc = adjust_resource(res, res->start - allocate, |
|
resource_size(res) + allocate); |
|
action = "cur grow up"; |
|
} else |
|
action = "allocate"; |
|
break; |
|
case ALLOC_MID: |
|
if (strcmp(next->name, label_id->id) == 0) { |
|
/* adjust next resource up */ |
|
rc = adjust_resource(next, next->start |
|
- allocate, resource_size(next) |
|
+ allocate); |
|
new_res = next; |
|
action = "next grow up"; |
|
} else if (strcmp(res->name, label_id->id) == 0) { |
|
action = "grow down"; |
|
} else |
|
action = "allocate"; |
|
break; |
|
case ALLOC_AFTER: |
|
if (strcmp(res->name, label_id->id) == 0) |
|
action = "grow down"; |
|
else |
|
action = "allocate"; |
|
break; |
|
default: |
|
return n; |
|
} |
|
|
|
if (strcmp(action, "allocate") == 0) { |
|
/* BLK allocate bottom up */ |
|
if (!is_pmem) |
|
valid.start += available - allocate; |
|
|
|
new_res = nvdimm_allocate_dpa(ndd, label_id, |
|
valid.start, allocate); |
|
if (!new_res) |
|
rc = -EBUSY; |
|
} else if (strcmp(action, "grow down") == 0) { |
|
/* adjust current resource down */ |
|
rc = adjust_resource(res, res->start, resource_size(res) |
|
+ allocate); |
|
if (rc == 0) |
|
res->flags |= DPA_RESOURCE_ADJUSTED; |
|
} |
|
|
|
if (!new_res) |
|
new_res = res; |
|
|
|
nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", |
|
action, loc, rc); |
|
|
|
if (rc) |
|
return n; |
|
|
|
n -= allocate; |
|
if (n) { |
|
/* |
|
* Retry scan with newly inserted resources. |
|
* For example, if we did an ALLOC_BEFORE |
|
* insertion there may also have been space |
|
* available for an ALLOC_AFTER insertion, so we |
|
* need to check this same resource again |
|
*/ |
|
goto retry; |
|
} else |
|
return 0; |
|
} |
|
|
|
/* |
|
* If we allocated nothing in the BLK case it may be because we are in |
|
* an initial "pmem-reserve pass". Only do an initial BLK allocation |
|
* when none of the DPA space is reserved. |
|
*/ |
|
if ((is_pmem || !ndd->dpa.child) && n == to_allocate) |
|
return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
|
return n; |
|
} |
|
|
|
static int merge_dpa(struct nd_region *nd_region, |
|
struct nd_mapping *nd_mapping, struct nd_label_id *label_id) |
|
{ |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct resource *res; |
|
|
|
if (strncmp("pmem", label_id->id, 4) == 0) |
|
return 0; |
|
retry: |
|
for_each_dpa_resource(ndd, res) { |
|
int rc; |
|
struct resource *next = res->sibling; |
|
resource_size_t end = res->start + resource_size(res); |
|
|
|
if (!next || strcmp(res->name, label_id->id) != 0 |
|
|| strcmp(next->name, label_id->id) != 0 |
|
|| end != next->start) |
|
continue; |
|
end += resource_size(next); |
|
nvdimm_free_dpa(ndd, next); |
|
rc = adjust_resource(res, res->start, end - res->start); |
|
nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); |
|
if (rc) |
|
return rc; |
|
res->flags |= DPA_RESOURCE_ADJUSTED; |
|
goto retry; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int __reserve_free_pmem(struct device *dev, void *data) |
|
{ |
|
struct nvdimm *nvdimm = data; |
|
struct nd_region *nd_region; |
|
struct nd_label_id label_id; |
|
int i; |
|
|
|
if (!is_memory(dev)) |
|
return 0; |
|
|
|
nd_region = to_nd_region(dev); |
|
if (nd_region->ndr_mappings == 0) |
|
return 0; |
|
|
|
memset(&label_id, 0, sizeof(label_id)); |
|
strcat(label_id.id, "pmem-reserve"); |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
resource_size_t n, rem = 0; |
|
|
|
if (nd_mapping->nvdimm != nvdimm) |
|
continue; |
|
|
|
n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); |
|
if (n == 0) |
|
return 0; |
|
rem = scan_allocate(nd_region, nd_mapping, &label_id, n); |
|
dev_WARN_ONCE(&nd_region->dev, rem, |
|
"pmem reserve underrun: %#llx of %#llx bytes\n", |
|
(unsigned long long) n - rem, |
|
(unsigned long long) n); |
|
return rem ? -ENXIO : 0; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
|
struct nd_mapping *nd_mapping) |
|
{ |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct resource *res, *_res; |
|
|
|
for_each_dpa_resource_safe(ndd, res, _res) |
|
if (strcmp(res->name, "pmem-reserve") == 0) |
|
nvdimm_free_dpa(ndd, res); |
|
} |
|
|
|
static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, |
|
struct nd_mapping *nd_mapping) |
|
{ |
|
struct nvdimm *nvdimm = nd_mapping->nvdimm; |
|
int rc; |
|
|
|
rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, |
|
__reserve_free_pmem); |
|
if (rc) |
|
release_free_pmem(nvdimm_bus, nd_mapping); |
|
return rc; |
|
} |
|
|
|
/** |
|
* grow_dpa_allocation - for each dimm allocate n bytes for @label_id |
|
* @nd_region: the set of dimms to allocate @n more bytes from |
|
* @label_id: unique identifier for the namespace consuming this dpa range |
|
* @n: number of bytes per-dimm to add to the existing allocation |
|
* |
|
* Assumes resources are ordered. For BLK regions, first consume |
|
* BLK-only available DPA free space, then consume PMEM-aliased DPA |
|
* space starting at the highest DPA. For PMEM regions start |
|
* allocations from the start of an interleave set and end at the first |
|
* BLK allocation or the end of the interleave set, whichever comes |
|
* first. |
|
*/ |
|
static int grow_dpa_allocation(struct nd_region *nd_region, |
|
struct nd_label_id *label_id, resource_size_t n) |
|
{ |
|
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
|
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
|
int i; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
resource_size_t rem = n; |
|
int rc, j; |
|
|
|
/* |
|
* In the BLK case try once with all unallocated PMEM |
|
* reserved, and once without |
|
*/ |
|
for (j = is_pmem; j < 2; j++) { |
|
bool blk_only = j == 0; |
|
|
|
if (blk_only) { |
|
rc = reserve_free_pmem(nvdimm_bus, nd_mapping); |
|
if (rc) |
|
return rc; |
|
} |
|
rem = scan_allocate(nd_region, nd_mapping, |
|
label_id, rem); |
|
if (blk_only) |
|
release_free_pmem(nvdimm_bus, nd_mapping); |
|
|
|
/* try again and allow encroachments into PMEM */ |
|
if (rem == 0) |
|
break; |
|
} |
|
|
|
dev_WARN_ONCE(&nd_region->dev, rem, |
|
"allocation underrun: %#llx of %#llx bytes\n", |
|
(unsigned long long) n - rem, |
|
(unsigned long long) n); |
|
if (rem) |
|
return -ENXIO; |
|
|
|
rc = merge_dpa(nd_region, nd_mapping, label_id); |
|
if (rc) |
|
return rc; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
|
struct nd_namespace_pmem *nspm, resource_size_t size) |
|
{ |
|
struct resource *res = &nspm->nsio.res; |
|
resource_size_t offset = 0; |
|
|
|
if (size && !nspm->uuid) { |
|
WARN_ON_ONCE(1); |
|
size = 0; |
|
} |
|
|
|
if (size && nspm->uuid) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_label_id label_id; |
|
struct resource *res; |
|
|
|
if (!ndd) { |
|
size = 0; |
|
goto out; |
|
} |
|
|
|
nd_label_gen_id(&label_id, nspm->uuid, 0); |
|
|
|
/* calculate a spa offset from the dpa allocation offset */ |
|
for_each_dpa_resource(ndd, res) |
|
if (strcmp(res->name, label_id.id) == 0) { |
|
offset = (res->start - nd_mapping->start) |
|
* nd_region->ndr_mappings; |
|
goto out; |
|
} |
|
|
|
WARN_ON_ONCE(1); |
|
size = 0; |
|
} |
|
|
|
out: |
|
res->start = nd_region->ndr_start + offset; |
|
res->end = res->start + size - 1; |
|
} |
|
|
|
static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) |
|
{ |
|
if (!uuid) { |
|
dev_dbg(dev, "%s: uuid not set\n", where); |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static ssize_t __size_store(struct device *dev, unsigned long long val) |
|
{ |
|
resource_size_t allocated = 0, available = 0; |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
struct nd_namespace_common *ndns = to_ndns(dev); |
|
struct nd_mapping *nd_mapping; |
|
struct nvdimm_drvdata *ndd; |
|
struct nd_label_id label_id; |
|
u32 flags = 0, remainder; |
|
int rc, i, id = -1; |
|
u8 *uuid = NULL; |
|
|
|
if (dev->driver || ndns->claim) |
|
return -EBUSY; |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
uuid = nspm->uuid; |
|
id = nspm->id; |
|
} else if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
uuid = nsblk->uuid; |
|
flags = NSLABEL_FLAG_LOCAL; |
|
id = nsblk->id; |
|
} |
|
|
|
/* |
|
* We need a uuid for the allocation-label and dimm(s) on which |
|
* to store the label. |
|
*/ |
|
if (uuid_not_set(uuid, dev, __func__)) |
|
return -ENXIO; |
|
if (nd_region->ndr_mappings == 0) { |
|
dev_dbg(dev, "not associated with dimm(s)\n"); |
|
return -ENXIO; |
|
} |
|
|
|
div_u64_rem(val, nd_region->align, &remainder); |
|
if (remainder) { |
|
dev_dbg(dev, "%llu is not %ldK aligned\n", val, |
|
nd_region->align / SZ_1K); |
|
return -EINVAL; |
|
} |
|
|
|
nd_label_gen_id(&label_id, uuid, flags); |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
nd_mapping = &nd_region->mapping[i]; |
|
ndd = to_ndd(nd_mapping); |
|
|
|
/* |
|
* All dimms in an interleave set, 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_allocatable_dpa(nd_region); |
|
|
|
if (val > available + allocated) |
|
return -ENOSPC; |
|
|
|
if (val == allocated) |
|
return 0; |
|
|
|
val = div_u64(val, nd_region->ndr_mappings); |
|
allocated = div_u64(allocated, nd_region->ndr_mappings); |
|
if (val < allocated) |
|
rc = shrink_dpa_allocation(nd_region, &label_id, |
|
allocated - val); |
|
else |
|
rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); |
|
|
|
if (rc) |
|
return rc; |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
nd_namespace_pmem_set_resource(nd_region, nspm, |
|
val * nd_region->ndr_mappings); |
|
} |
|
|
|
/* |
|
* Try to delete the namespace if we deleted all of its |
|
* allocation, this is not the seed or 0th device for the |
|
* region, and it is not actively claimed by a btt, pfn, or dax |
|
* instance. |
|
*/ |
|
if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
|
nd_device_unregister(dev, ND_ASYNC); |
|
|
|
return rc; |
|
} |
|
|
|
static ssize_t size_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t len) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
unsigned long long val; |
|
u8 **uuid = NULL; |
|
int rc; |
|
|
|
rc = kstrtoull(buf, 0, &val); |
|
if (rc) |
|
return rc; |
|
|
|
nd_device_lock(dev); |
|
nvdimm_bus_lock(dev); |
|
wait_nvdimm_bus_probe_idle(dev); |
|
rc = __size_store(dev, val); |
|
if (rc >= 0) |
|
rc = nd_namespace_label_update(nd_region, dev); |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
uuid = &nspm->uuid; |
|
} else if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
uuid = &nsblk->uuid; |
|
} |
|
|
|
if (rc == 0 && val == 0 && uuid) { |
|
/* setting size zero == 'delete namespace' */ |
|
kfree(*uuid); |
|
*uuid = NULL; |
|
} |
|
|
|
dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc); |
|
|
|
nvdimm_bus_unlock(dev); |
|
nd_device_unlock(dev); |
|
|
|
return rc < 0 ? rc : len; |
|
} |
|
|
|
resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
|
{ |
|
struct device *dev = &ndns->dev; |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
return resource_size(&nspm->nsio.res); |
|
} else if (is_namespace_blk(dev)) { |
|
return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
|
} else if (is_namespace_io(dev)) { |
|
struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
|
|
|
return resource_size(&nsio->res); |
|
} else |
|
WARN_ONCE(1, "unknown namespace type\n"); |
|
return 0; |
|
} |
|
|
|
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
|
{ |
|
resource_size_t size; |
|
|
|
nvdimm_bus_lock(&ndns->dev); |
|
size = __nvdimm_namespace_capacity(ndns); |
|
nvdimm_bus_unlock(&ndns->dev); |
|
|
|
return size; |
|
} |
|
EXPORT_SYMBOL(nvdimm_namespace_capacity); |
|
|
|
bool nvdimm_namespace_locked(struct nd_namespace_common *ndns) |
|
{ |
|
int i; |
|
bool locked = false; |
|
struct device *dev = &ndns->dev; |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm *nvdimm = nd_mapping->nvdimm; |
|
|
|
if (test_bit(NDD_LOCKED, &nvdimm->flags)) { |
|
dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm)); |
|
locked = true; |
|
} |
|
} |
|
return locked; |
|
} |
|
EXPORT_SYMBOL(nvdimm_namespace_locked); |
|
|
|
static ssize_t size_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%llu\n", (unsigned long long) |
|
nvdimm_namespace_capacity(to_ndns(dev))); |
|
} |
|
static DEVICE_ATTR(size, 0444, size_show, size_store); |
|
|
|
static u8 *namespace_to_uuid(struct device *dev) |
|
{ |
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
return nspm->uuid; |
|
} else if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
return nsblk->uuid; |
|
} else |
|
return ERR_PTR(-ENXIO); |
|
} |
|
|
|
static ssize_t uuid_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
u8 *uuid = namespace_to_uuid(dev); |
|
|
|
if (IS_ERR(uuid)) |
|
return PTR_ERR(uuid); |
|
if (uuid) |
|
return sprintf(buf, "%pUb\n", uuid); |
|
return sprintf(buf, "\n"); |
|
} |
|
|
|
/** |
|
* namespace_update_uuid - check for a unique uuid and whether we're "renaming" |
|
* @nd_region: parent region so we can updates all dimms in the set |
|
* @dev: namespace type for generating label_id |
|
* @new_uuid: incoming uuid |
|
* @old_uuid: reference to the uuid storage location in the namespace object |
|
*/ |
|
static int namespace_update_uuid(struct nd_region *nd_region, |
|
struct device *dev, u8 *new_uuid, u8 **old_uuid) |
|
{ |
|
u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; |
|
struct nd_label_id old_label_id; |
|
struct nd_label_id new_label_id; |
|
int i; |
|
|
|
if (!nd_is_uuid_unique(dev, new_uuid)) |
|
return -EINVAL; |
|
|
|
if (*old_uuid == NULL) |
|
goto out; |
|
|
|
/* |
|
* If we've already written a label with this uuid, then it's |
|
* too late to rename because we can't reliably update the uuid |
|
* without losing the old namespace. Userspace must delete this |
|
* namespace to abandon the old uuid. |
|
*/ |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
|
|
/* |
|
* This check by itself is sufficient because old_uuid |
|
* would be NULL above if this uuid did not exist in the |
|
* currently written set. |
|
* |
|
* FIXME: can we delete uuid with zero dpa allocated? |
|
*/ |
|
if (list_empty(&nd_mapping->labels)) |
|
return -EBUSY; |
|
} |
|
|
|
nd_label_gen_id(&old_label_id, *old_uuid, flags); |
|
nd_label_gen_id(&new_label_id, new_uuid, flags); |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_label_ent *label_ent; |
|
struct resource *res; |
|
|
|
for_each_dpa_resource(ndd, res) |
|
if (strcmp(res->name, old_label_id.id) == 0) |
|
sprintf((void *) res->name, "%s", |
|
new_label_id.id); |
|
|
|
mutex_lock(&nd_mapping->lock); |
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
|
struct nd_namespace_label *nd_label = label_ent->label; |
|
struct nd_label_id label_id; |
|
|
|
if (!nd_label) |
|
continue; |
|
nd_label_gen_id(&label_id, nd_label->uuid, |
|
nsl_get_flags(ndd, nd_label)); |
|
if (strcmp(old_label_id.id, label_id.id) == 0) |
|
set_bit(ND_LABEL_REAP, &label_ent->flags); |
|
} |
|
mutex_unlock(&nd_mapping->lock); |
|
} |
|
kfree(*old_uuid); |
|
out: |
|
*old_uuid = new_uuid; |
|
return 0; |
|
} |
|
|
|
static ssize_t uuid_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t len) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
u8 *uuid = NULL; |
|
ssize_t rc = 0; |
|
u8 **ns_uuid; |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
ns_uuid = &nspm->uuid; |
|
} else if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
ns_uuid = &nsblk->uuid; |
|
} else |
|
return -ENXIO; |
|
|
|
nd_device_lock(dev); |
|
nvdimm_bus_lock(dev); |
|
wait_nvdimm_bus_probe_idle(dev); |
|
if (to_ndns(dev)->claim) |
|
rc = -EBUSY; |
|
if (rc >= 0) |
|
rc = nd_uuid_store(dev, &uuid, buf, len); |
|
if (rc >= 0) |
|
rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); |
|
if (rc >= 0) |
|
rc = nd_namespace_label_update(nd_region, dev); |
|
else |
|
kfree(uuid); |
|
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf, |
|
buf[len - 1] == '\n' ? "" : "\n"); |
|
nvdimm_bus_unlock(dev); |
|
nd_device_unlock(dev); |
|
|
|
return rc < 0 ? rc : len; |
|
} |
|
static DEVICE_ATTR_RW(uuid); |
|
|
|
static ssize_t resource_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct resource *res; |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
res = &nspm->nsio.res; |
|
} else if (is_namespace_io(dev)) { |
|
struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
|
|
|
res = &nsio->res; |
|
} else |
|
return -ENXIO; |
|
|
|
/* no address to convey if the namespace has no allocation */ |
|
if (resource_size(res) == 0) |
|
return -ENXIO; |
|
return sprintf(buf, "%#llx\n", (unsigned long long) res->start); |
|
} |
|
static DEVICE_ATTR_ADMIN_RO(resource); |
|
|
|
static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, |
|
4096, 4104, 4160, 4224, 0 }; |
|
|
|
static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
|
|
|
static ssize_t sector_size_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
return nd_size_select_show(nsblk->lbasize, |
|
blk_lbasize_supported, buf); |
|
} |
|
|
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
return nd_size_select_show(nspm->lbasize, |
|
pmem_lbasize_supported, buf); |
|
} |
|
return -ENXIO; |
|
} |
|
|
|
static ssize_t sector_size_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t len) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
const unsigned long *supported; |
|
unsigned long *lbasize; |
|
ssize_t rc = 0; |
|
|
|
if (is_namespace_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 |
|
return -ENXIO; |
|
|
|
nd_device_lock(dev); |
|
nvdimm_bus_lock(dev); |
|
if (to_ndns(dev)->claim) |
|
rc = -EBUSY; |
|
if (rc >= 0) |
|
rc = nd_size_select_store(dev, buf, lbasize, supported); |
|
if (rc >= 0) |
|
rc = nd_namespace_label_update(nd_region, dev); |
|
dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote", |
|
buf, buf[len - 1] == '\n' ? "" : "\n"); |
|
nvdimm_bus_unlock(dev); |
|
nd_device_unlock(dev); |
|
|
|
return rc ? rc : len; |
|
} |
|
static DEVICE_ATTR_RW(sector_size); |
|
|
|
static ssize_t dpa_extents_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
struct nd_label_id label_id; |
|
int count = 0, i; |
|
u8 *uuid = NULL; |
|
u32 flags = 0; |
|
|
|
nvdimm_bus_lock(dev); |
|
if (is_namespace_pmem(dev)) { |
|
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
|
|
|
uuid = nspm->uuid; |
|
flags = 0; |
|
} else if (is_namespace_blk(dev)) { |
|
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
|
|
|
uuid = nsblk->uuid; |
|
flags = NSLABEL_FLAG_LOCAL; |
|
} |
|
|
|
if (!uuid) |
|
goto out; |
|
|
|
nd_label_gen_id(&label_id, uuid, flags); |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct resource *res; |
|
|
|
for_each_dpa_resource(ndd, res) |
|
if (strcmp(res->name, label_id.id) == 0) |
|
count++; |
|
} |
|
out: |
|
nvdimm_bus_unlock(dev); |
|
|
|
return sprintf(buf, "%d\n", count); |
|
} |
|
static DEVICE_ATTR_RO(dpa_extents); |
|
|
|
static int btt_claim_class(struct device *dev) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
int i, loop_bitmask = 0; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_namespace_index *nsindex; |
|
|
|
/* |
|
* If any of the DIMMs do not support labels the only |
|
* possible BTT format is v1. |
|
*/ |
|
if (!ndd) { |
|
loop_bitmask = 0; |
|
break; |
|
} |
|
|
|
nsindex = to_namespace_index(ndd, ndd->ns_current); |
|
if (nsindex == NULL) |
|
loop_bitmask |= 1; |
|
else { |
|
/* check whether existing labels are v1.1 or v1.2 */ |
|
if (__le16_to_cpu(nsindex->major) == 1 |
|
&& __le16_to_cpu(nsindex->minor) == 1) |
|
loop_bitmask |= 2; |
|
else |
|
loop_bitmask |= 4; |
|
} |
|
} |
|
/* |
|
* If nsindex is null loop_bitmask's bit 0 will be set, and if an index |
|
* block is found, a v1.1 label for any mapping will set bit 1, and a |
|
* v1.2 label will set bit 2. |
|
* |
|
* At the end of the loop, at most one of the three bits must be set. |
|
* If multiple bits were set, it means the different mappings disagree |
|
* about their labels, and this must be cleaned up first. |
|
* |
|
* If all the label index blocks are found to agree, nsindex of NULL |
|
* implies labels haven't been initialized yet, and when they will, |
|
* they will be of the 1.2 format, so we can assume BTT2.0 |
|
* |
|
* If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are |
|
* found, we enforce BTT2.0 |
|
* |
|
* If the loop was never entered, default to BTT1.1 (legacy namespaces) |
|
*/ |
|
switch (loop_bitmask) { |
|
case 0: |
|
case 2: |
|
return NVDIMM_CCLASS_BTT; |
|
case 1: |
|
case 4: |
|
return NVDIMM_CCLASS_BTT2; |
|
default: |
|
return -ENXIO; |
|
} |
|
} |
|
|
|
static ssize_t holder_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct nd_namespace_common *ndns = to_ndns(dev); |
|
ssize_t rc; |
|
|
|
nd_device_lock(dev); |
|
rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
|
nd_device_unlock(dev); |
|
|
|
return rc; |
|
} |
|
static DEVICE_ATTR_RO(holder); |
|
|
|
static int __holder_class_store(struct device *dev, const char *buf) |
|
{ |
|
struct nd_namespace_common *ndns = to_ndns(dev); |
|
|
|
if (dev->driver || ndns->claim) |
|
return -EBUSY; |
|
|
|
if (sysfs_streq(buf, "btt")) { |
|
int rc = btt_claim_class(dev); |
|
|
|
if (rc < NVDIMM_CCLASS_NONE) |
|
return rc; |
|
ndns->claim_class = rc; |
|
} else if (sysfs_streq(buf, "pfn")) |
|
ndns->claim_class = NVDIMM_CCLASS_PFN; |
|
else if (sysfs_streq(buf, "dax")) |
|
ndns->claim_class = NVDIMM_CCLASS_DAX; |
|
else if (sysfs_streq(buf, "")) |
|
ndns->claim_class = NVDIMM_CCLASS_NONE; |
|
else |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t holder_class_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t len) |
|
{ |
|
struct nd_region *nd_region = to_nd_region(dev->parent); |
|
int rc; |
|
|
|
nd_device_lock(dev); |
|
nvdimm_bus_lock(dev); |
|
wait_nvdimm_bus_probe_idle(dev); |
|
rc = __holder_class_store(dev, buf); |
|
if (rc >= 0) |
|
rc = nd_namespace_label_update(nd_region, dev); |
|
dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc); |
|
nvdimm_bus_unlock(dev); |
|
nd_device_unlock(dev); |
|
|
|
return rc < 0 ? rc : len; |
|
} |
|
|
|
static ssize_t holder_class_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct nd_namespace_common *ndns = to_ndns(dev); |
|
ssize_t rc; |
|
|
|
nd_device_lock(dev); |
|
if (ndns->claim_class == NVDIMM_CCLASS_NONE) |
|
rc = sprintf(buf, "\n"); |
|
else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || |
|
(ndns->claim_class == NVDIMM_CCLASS_BTT2)) |
|
rc = sprintf(buf, "btt\n"); |
|
else if (ndns->claim_class == NVDIMM_CCLASS_PFN) |
|
rc = sprintf(buf, "pfn\n"); |
|
else if (ndns->claim_class == NVDIMM_CCLASS_DAX) |
|
rc = sprintf(buf, "dax\n"); |
|
else |
|
rc = sprintf(buf, "<unknown>\n"); |
|
nd_device_unlock(dev); |
|
|
|
return rc; |
|
} |
|
static DEVICE_ATTR_RW(holder_class); |
|
|
|
static ssize_t mode_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct nd_namespace_common *ndns = to_ndns(dev); |
|
struct device *claim; |
|
char *mode; |
|
ssize_t rc; |
|
|
|
nd_device_lock(dev); |
|
claim = ndns->claim; |
|
if (claim && is_nd_btt(claim)) |
|
mode = "safe"; |
|
else if (claim && is_nd_pfn(claim)) |
|
mode = "memory"; |
|
else if (claim && is_nd_dax(claim)) |
|
mode = "dax"; |
|
else if (!claim && pmem_should_map_pages(dev)) |
|
mode = "memory"; |
|
else |
|
mode = "raw"; |
|
rc = sprintf(buf, "%s\n", mode); |
|
nd_device_unlock(dev); |
|
|
|
return rc; |
|
} |
|
static DEVICE_ATTR_RO(mode); |
|
|
|
static ssize_t force_raw_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t len) |
|
{ |
|
bool force_raw; |
|
int rc = strtobool(buf, &force_raw); |
|
|
|
if (rc) |
|
return rc; |
|
|
|
to_ndns(dev)->force_raw = force_raw; |
|
return len; |
|
} |
|
|
|
static ssize_t force_raw_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); |
|
} |
|
static DEVICE_ATTR_RW(force_raw); |
|
|
|
static struct attribute *nd_namespace_attributes[] = { |
|
&dev_attr_nstype.attr, |
|
&dev_attr_size.attr, |
|
&dev_attr_mode.attr, |
|
&dev_attr_uuid.attr, |
|
&dev_attr_holder.attr, |
|
&dev_attr_resource.attr, |
|
&dev_attr_alt_name.attr, |
|
&dev_attr_force_raw.attr, |
|
&dev_attr_sector_size.attr, |
|
&dev_attr_dpa_extents.attr, |
|
&dev_attr_holder_class.attr, |
|
NULL, |
|
}; |
|
|
|
static umode_t namespace_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = container_of(kobj, struct device, kobj); |
|
|
|
if (a == &dev_attr_resource.attr && is_namespace_blk(dev)) |
|
return 0; |
|
|
|
if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { |
|
if (a == &dev_attr_size.attr) |
|
return 0644; |
|
|
|
return a->mode; |
|
} |
|
|
|
/* base is_namespace_io() attributes */ |
|
if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr || |
|
a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr || |
|
a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr || |
|
a == &dev_attr_resource.attr) |
|
return a->mode; |
|
|
|
return 0; |
|
} |
|
|
|
static struct attribute_group nd_namespace_attribute_group = { |
|
.attrs = nd_namespace_attributes, |
|
.is_visible = namespace_visible, |
|
}; |
|
|
|
static const struct attribute_group *nd_namespace_attribute_groups[] = { |
|
&nd_device_attribute_group, |
|
&nd_namespace_attribute_group, |
|
&nd_numa_attribute_group, |
|
NULL, |
|
}; |
|
|
|
static const struct device_type namespace_io_device_type = { |
|
.name = "nd_namespace_io", |
|
.release = namespace_io_release, |
|
.groups = nd_namespace_attribute_groups, |
|
}; |
|
|
|
static const struct device_type namespace_pmem_device_type = { |
|
.name = "nd_namespace_pmem", |
|
.release = namespace_pmem_release, |
|
.groups = nd_namespace_attribute_groups, |
|
}; |
|
|
|
static const struct device_type namespace_blk_device_type = { |
|
.name = "nd_namespace_blk", |
|
.release = namespace_blk_release, |
|
.groups = nd_namespace_attribute_groups, |
|
}; |
|
|
|
static bool is_namespace_pmem(const struct device *dev) |
|
{ |
|
return dev ? dev->type == &namespace_pmem_device_type : false; |
|
} |
|
|
|
static bool is_namespace_blk(const struct device *dev) |
|
{ |
|
return dev ? dev->type == &namespace_blk_device_type : false; |
|
} |
|
|
|
static bool is_namespace_io(const struct device *dev) |
|
{ |
|
return dev ? dev->type == &namespace_io_device_type : false; |
|
} |
|
|
|
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
|
{ |
|
struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; |
|
struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
|
struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
|
struct nd_namespace_common *ndns = NULL; |
|
resource_size_t size; |
|
|
|
if (nd_btt || nd_pfn || nd_dax) { |
|
if (nd_btt) |
|
ndns = nd_btt->ndns; |
|
else if (nd_pfn) |
|
ndns = nd_pfn->ndns; |
|
else if (nd_dax) |
|
ndns = nd_dax->nd_pfn.ndns; |
|
|
|
if (!ndns) |
|
return ERR_PTR(-ENODEV); |
|
|
|
/* |
|
* Flush any in-progess probes / removals in the driver |
|
* for the raw personality of this namespace. |
|
*/ |
|
nd_device_lock(&ndns->dev); |
|
nd_device_unlock(&ndns->dev); |
|
if (ndns->dev.driver) { |
|
dev_dbg(&ndns->dev, "is active, can't bind %s\n", |
|
dev_name(dev)); |
|
return ERR_PTR(-EBUSY); |
|
} |
|
if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
|
"host (%s) vs claim (%s) mismatch\n", |
|
dev_name(dev), |
|
dev_name(ndns->claim))) |
|
return ERR_PTR(-ENXIO); |
|
} else { |
|
ndns = to_ndns(dev); |
|
if (ndns->claim) { |
|
dev_dbg(dev, "claimed by %s, failing probe\n", |
|
dev_name(ndns->claim)); |
|
|
|
return ERR_PTR(-ENXIO); |
|
} |
|
} |
|
|
|
if (nvdimm_namespace_locked(ndns)) |
|
return ERR_PTR(-EACCES); |
|
|
|
size = nvdimm_namespace_capacity(ndns); |
|
if (size < ND_MIN_NAMESPACE_SIZE) { |
|
dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", |
|
&size, ND_MIN_NAMESPACE_SIZE); |
|
return ERR_PTR(-ENODEV); |
|
} |
|
|
|
/* |
|
* Note, alignment validation for fsdax and devdax mode |
|
* namespaces happens in nd_pfn_validate() where infoblock |
|
* padding parameters can be applied. |
|
*/ |
|
if (pmem_should_map_pages(dev)) { |
|
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev); |
|
struct resource *res = &nsio->res; |
|
|
|
if (!IS_ALIGNED(res->start | (res->end + 1), |
|
memremap_compat_align())) { |
|
dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res); |
|
return ERR_PTR(-EOPNOTSUPP); |
|
} |
|
} |
|
|
|
if (is_namespace_pmem(&ndns->dev)) { |
|
struct nd_namespace_pmem *nspm; |
|
|
|
nspm = to_nd_namespace_pmem(&ndns->dev); |
|
if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
|
return ERR_PTR(-ENODEV); |
|
} else if (is_namespace_blk(&ndns->dev)) { |
|
struct nd_namespace_blk *nsblk; |
|
|
|
nsblk = to_nd_namespace_blk(&ndns->dev); |
|
if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__)) |
|
return ERR_PTR(-ENODEV); |
|
if (!nsblk->lbasize) { |
|
dev_dbg(&ndns->dev, "sector size not set\n"); |
|
return ERR_PTR(-ENODEV); |
|
} |
|
if (!nd_namespace_blk_validate(nsblk)) |
|
return ERR_PTR(-ENODEV); |
|
} |
|
|
|
return ndns; |
|
} |
|
EXPORT_SYMBOL(nvdimm_namespace_common_probe); |
|
|
|
int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns, |
|
resource_size_t size) |
|
{ |
|
if (is_namespace_blk(&ndns->dev)) |
|
return 0; |
|
return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size); |
|
} |
|
EXPORT_SYMBOL_GPL(devm_namespace_enable); |
|
|
|
void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns) |
|
{ |
|
if (is_namespace_blk(&ndns->dev)) |
|
return; |
|
devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev)); |
|
} |
|
EXPORT_SYMBOL_GPL(devm_namespace_disable); |
|
|
|
static struct device **create_namespace_io(struct nd_region *nd_region) |
|
{ |
|
struct nd_namespace_io *nsio; |
|
struct device *dev, **devs; |
|
struct resource *res; |
|
|
|
nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); |
|
if (!nsio) |
|
return NULL; |
|
|
|
devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
|
if (!devs) { |
|
kfree(nsio); |
|
return NULL; |
|
} |
|
|
|
dev = &nsio->common.dev; |
|
dev->type = &namespace_io_device_type; |
|
dev->parent = &nd_region->dev; |
|
res = &nsio->res; |
|
res->name = dev_name(&nd_region->dev); |
|
res->flags = IORESOURCE_MEM; |
|
res->start = nd_region->ndr_start; |
|
res->end = res->start + nd_region->ndr_size - 1; |
|
|
|
devs[0] = dev; |
|
return devs; |
|
} |
|
|
|
static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
|
u64 cookie, u16 pos) |
|
{ |
|
struct nd_namespace_label *found = NULL; |
|
int i; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nd_interleave_set *nd_set = nd_region->nd_set; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_label_ent *label_ent; |
|
bool found_uuid = false; |
|
|
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
|
struct nd_namespace_label *nd_label = label_ent->label; |
|
u16 position, nlabel; |
|
|
|
if (!nd_label) |
|
continue; |
|
position = nsl_get_position(ndd, nd_label); |
|
nlabel = nsl_get_nlabel(ndd, nd_label); |
|
|
|
if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) |
|
continue; |
|
|
|
if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) |
|
continue; |
|
|
|
if (!nsl_validate_type_guid(ndd, nd_label, |
|
&nd_set->type_guid)) |
|
continue; |
|
|
|
if (found_uuid) { |
|
dev_dbg(ndd->dev, "duplicate entry for uuid\n"); |
|
return false; |
|
} |
|
found_uuid = true; |
|
if (nlabel != nd_region->ndr_mappings) |
|
continue; |
|
if (position != pos) |
|
continue; |
|
found = nd_label; |
|
break; |
|
} |
|
if (found) |
|
break; |
|
} |
|
return found != NULL; |
|
} |
|
|
|
static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) |
|
{ |
|
int i; |
|
|
|
if (!pmem_id) |
|
return -ENODEV; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_namespace_label *nd_label = NULL; |
|
u64 hw_start, hw_end, pmem_start, pmem_end; |
|
struct nd_label_ent *label_ent; |
|
|
|
lockdep_assert_held(&nd_mapping->lock); |
|
list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
|
nd_label = label_ent->label; |
|
if (!nd_label) |
|
continue; |
|
if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
|
break; |
|
nd_label = NULL; |
|
} |
|
|
|
if (!nd_label) { |
|
WARN_ON(1); |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* Check that this label is compliant with the dpa |
|
* range published in NFIT |
|
*/ |
|
hw_start = nd_mapping->start; |
|
hw_end = hw_start + nd_mapping->size; |
|
pmem_start = nsl_get_dpa(ndd, nd_label); |
|
pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label); |
|
if (pmem_start >= hw_start && pmem_start < hw_end |
|
&& pmem_end <= hw_end && pmem_end > hw_start) |
|
/* pass */; |
|
else { |
|
dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", |
|
dev_name(ndd->dev), nd_label->uuid); |
|
return -EINVAL; |
|
} |
|
|
|
/* move recently validated label to the front of the list */ |
|
list_move(&label_ent->list, &nd_mapping->labels); |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* create_namespace_pmem - validate interleave set labelling, retrieve label0 |
|
* @nd_region: region with mappings to validate |
|
* @nspm: target namespace to create |
|
* @nd_label: target pmem namespace label to evaluate |
|
*/ |
|
static struct device *create_namespace_pmem(struct nd_region *nd_region, |
|
struct nd_mapping *nd_mapping, |
|
struct nd_namespace_label *nd_label) |
|
{ |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_namespace_index *nsindex = |
|
to_namespace_index(ndd, ndd->ns_current); |
|
u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
|
u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
|
struct nd_label_ent *label_ent; |
|
struct nd_namespace_pmem *nspm; |
|
resource_size_t size = 0; |
|
struct resource *res; |
|
struct device *dev; |
|
int rc = 0; |
|
u16 i; |
|
|
|
if (cookie == 0) { |
|
dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); |
|
return ERR_PTR(-ENXIO); |
|
} |
|
|
|
if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) { |
|
dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", |
|
nd_label->uuid); |
|
if (!nsl_validate_isetcookie(ndd, nd_label, altcookie)) |
|
return ERR_PTR(-EAGAIN); |
|
|
|
dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", |
|
nd_label->uuid); |
|
} |
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
|
if (!nspm) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
nspm->id = -1; |
|
dev = &nspm->nsio.common.dev; |
|
dev->type = &namespace_pmem_device_type; |
|
dev->parent = &nd_region->dev; |
|
res = &nspm->nsio.res; |
|
res->name = dev_name(&nd_region->dev); |
|
res->flags = IORESOURCE_MEM; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) |
|
continue; |
|
if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i)) |
|
continue; |
|
break; |
|
} |
|
|
|
if (i < nd_region->ndr_mappings) { |
|
struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
|
|
|
/* |
|
* Give up if we don't find an instance of a uuid at each |
|
* position (from 0 to nd_region->ndr_mappings - 1), or if we |
|
* find a dimm with two instances of the same uuid. |
|
*/ |
|
dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
|
nvdimm_name(nvdimm), nd_label->uuid); |
|
rc = -EINVAL; |
|
goto err; |
|
} |
|
|
|
/* |
|
* Fix up each mapping's 'labels' to have the validated pmem label for |
|
* that position at labels[0], and NULL at labels[1]. In the process, |
|
* check that the namespace aligns with interleave-set. We know |
|
* that it does not overlap with any blk namespaces by virtue of |
|
* the dimm being enabled (i.e. nd_label_reserve_dpa() |
|
* succeeded). |
|
*/ |
|
rc = select_pmem_id(nd_region, nd_label->uuid); |
|
if (rc) |
|
goto err; |
|
|
|
/* Calculate total size and populate namespace properties from label0 */ |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_namespace_label *label0; |
|
struct nvdimm_drvdata *ndd; |
|
|
|
nd_mapping = &nd_region->mapping[i]; |
|
label_ent = list_first_entry_or_null(&nd_mapping->labels, |
|
typeof(*label_ent), list); |
|
label0 = label_ent ? label_ent->label : NULL; |
|
|
|
if (!label0) { |
|
WARN_ON(1); |
|
continue; |
|
} |
|
|
|
ndd = to_ndd(nd_mapping); |
|
size += nsl_get_rawsize(ndd, label0); |
|
if (nsl_get_position(ndd, label0) != 0) |
|
continue; |
|
WARN_ON(nspm->alt_name || nspm->uuid); |
|
nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0), |
|
NSLABEL_NAME_LEN, GFP_KERNEL); |
|
nspm->uuid = kmemdup((void __force *) label0->uuid, |
|
NSLABEL_UUID_LEN, GFP_KERNEL); |
|
nspm->lbasize = nsl_get_lbasize(ndd, label0); |
|
nspm->nsio.common.claim_class = |
|
nsl_get_claim_class(ndd, label0); |
|
} |
|
|
|
if (!nspm->alt_name || !nspm->uuid) { |
|
rc = -ENOMEM; |
|
goto err; |
|
} |
|
|
|
nd_namespace_pmem_set_resource(nd_region, nspm, size); |
|
|
|
return dev; |
|
err: |
|
namespace_pmem_release(dev); |
|
switch (rc) { |
|
case -EINVAL: |
|
dev_dbg(&nd_region->dev, "invalid label(s)\n"); |
|
break; |
|
case -ENODEV: |
|
dev_dbg(&nd_region->dev, "label not found\n"); |
|
break; |
|
default: |
|
dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); |
|
break; |
|
} |
|
return ERR_PTR(rc); |
|
} |
|
|
|
struct resource *nsblk_add_resource(struct nd_region *nd_region, |
|
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, |
|
resource_size_t start) |
|
{ |
|
struct nd_label_id label_id; |
|
struct resource *res; |
|
|
|
nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
|
res = krealloc(nsblk->res, |
|
sizeof(void *) * (nsblk->num_resources + 1), |
|
GFP_KERNEL); |
|
if (!res) |
|
return NULL; |
|
nsblk->res = (struct resource **) res; |
|
for_each_dpa_resource(ndd, res) |
|
if (strcmp(res->name, label_id.id) == 0 |
|
&& res->start == start) { |
|
nsblk->res[nsblk->num_resources++] = res; |
|
return res; |
|
} |
|
return NULL; |
|
} |
|
|
|
static struct device *nd_namespace_blk_create(struct nd_region *nd_region) |
|
{ |
|
struct nd_namespace_blk *nsblk; |
|
struct device *dev; |
|
|
|
if (!is_nd_blk(&nd_region->dev)) |
|
return NULL; |
|
|
|
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
|
if (!nsblk) |
|
return NULL; |
|
|
|
dev = &nsblk->common.dev; |
|
dev->type = &namespace_blk_device_type; |
|
nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); |
|
if (nsblk->id < 0) { |
|
kfree(nsblk); |
|
return NULL; |
|
} |
|
dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); |
|
dev->parent = &nd_region->dev; |
|
|
|
return &nsblk->common.dev; |
|
} |
|
|
|
static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
|
{ |
|
struct nd_namespace_pmem *nspm; |
|
struct resource *res; |
|
struct device *dev; |
|
|
|
if (!is_memory(&nd_region->dev)) |
|
return NULL; |
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
|
if (!nspm) |
|
return NULL; |
|
|
|
dev = &nspm->nsio.common.dev; |
|
dev->type = &namespace_pmem_device_type; |
|
dev->parent = &nd_region->dev; |
|
res = &nspm->nsio.res; |
|
res->name = dev_name(&nd_region->dev); |
|
res->flags = IORESOURCE_MEM; |
|
|
|
nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); |
|
if (nspm->id < 0) { |
|
kfree(nspm); |
|
return NULL; |
|
} |
|
dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); |
|
nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
|
|
|
return dev; |
|
} |
|
|
|
void nd_region_create_ns_seed(struct nd_region *nd_region) |
|
{ |
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
|
|
|
if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) |
|
return; |
|
|
|
if (is_nd_blk(&nd_region->dev)) |
|
nd_region->ns_seed = nd_namespace_blk_create(nd_region); |
|
else |
|
nd_region->ns_seed = nd_namespace_pmem_create(nd_region); |
|
|
|
/* |
|
* Seed creation failures are not fatal, provisioning is simply |
|
* disabled until memory becomes available |
|
*/ |
|
if (!nd_region->ns_seed) |
|
dev_err(&nd_region->dev, "failed to create %s namespace\n", |
|
is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); |
|
else |
|
nd_device_register(nd_region->ns_seed); |
|
} |
|
|
|
void nd_region_create_dax_seed(struct nd_region *nd_region) |
|
{ |
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
|
nd_region->dax_seed = nd_dax_create(nd_region); |
|
/* |
|
* Seed creation failures are not fatal, provisioning is simply |
|
* disabled until memory becomes available |
|
*/ |
|
if (!nd_region->dax_seed) |
|
dev_err(&nd_region->dev, "failed to create dax namespace\n"); |
|
} |
|
|
|
void nd_region_create_pfn_seed(struct nd_region *nd_region) |
|
{ |
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
|
nd_region->pfn_seed = nd_pfn_create(nd_region); |
|
/* |
|
* Seed creation failures are not fatal, provisioning is simply |
|
* disabled until memory becomes available |
|
*/ |
|
if (!nd_region->pfn_seed) |
|
dev_err(&nd_region->dev, "failed to create pfn namespace\n"); |
|
} |
|
|
|
void nd_region_create_btt_seed(struct nd_region *nd_region) |
|
{ |
|
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
|
nd_region->btt_seed = nd_btt_create(nd_region); |
|
/* |
|
* Seed creation failures are not fatal, provisioning is simply |
|
* disabled until memory becomes available |
|
*/ |
|
if (!nd_region->btt_seed) |
|
dev_err(&nd_region->dev, "failed to create btt namespace\n"); |
|
} |
|
|
|
static int add_namespace_resource(struct nd_region *nd_region, |
|
struct nd_namespace_label *nd_label, struct device **devs, |
|
int count) |
|
{ |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
int i; |
|
|
|
for (i = 0; i < count; i++) { |
|
u8 *uuid = namespace_to_uuid(devs[i]); |
|
struct resource *res; |
|
|
|
if (IS_ERR_OR_NULL(uuid)) { |
|
WARN_ON(1); |
|
continue; |
|
} |
|
|
|
if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0) |
|
continue; |
|
if (is_namespace_blk(devs[i])) { |
|
res = nsblk_add_resource(nd_region, ndd, |
|
to_nd_namespace_blk(devs[i]), |
|
nsl_get_dpa(ndd, nd_label)); |
|
if (!res) |
|
return -ENXIO; |
|
nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count); |
|
} else { |
|
dev_err(&nd_region->dev, |
|
"error: conflicting extents for uuid: %pUb\n", |
|
nd_label->uuid); |
|
return -ENXIO; |
|
} |
|
break; |
|
} |
|
|
|
return i; |
|
} |
|
|
|
static struct device *create_namespace_blk(struct nd_region *nd_region, |
|
struct nd_namespace_label *nd_label, int count) |
|
{ |
|
|
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
|
struct nd_interleave_set *nd_set = nd_region->nd_set; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nd_namespace_blk *nsblk; |
|
char name[NSLABEL_NAME_LEN]; |
|
struct device *dev = NULL; |
|
struct resource *res; |
|
|
|
if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid)) |
|
return ERR_PTR(-EAGAIN); |
|
if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2)) |
|
return ERR_PTR(-EAGAIN); |
|
|
|
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 = nsl_get_lbasize(ndd, nd_label); |
|
nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, GFP_KERNEL); |
|
nsblk->common.claim_class = nsl_get_claim_class(ndd, nd_label); |
|
if (!nsblk->uuid) |
|
goto blk_err; |
|
nsl_get_name(ndd, nd_label, name); |
|
if (name[0]) { |
|
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL); |
|
if (!nsblk->alt_name) |
|
goto blk_err; |
|
} |
|
res = nsblk_add_resource(nd_region, ndd, nsblk, |
|
nsl_get_dpa(ndd, nd_label)); |
|
if (!res) |
|
goto blk_err; |
|
nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); |
|
return dev; |
|
blk_err: |
|
namespace_blk_release(dev); |
|
return ERR_PTR(-ENXIO); |
|
} |
|
|
|
static int cmp_dpa(const void *a, const void *b) |
|
{ |
|
const struct device *dev_a = *(const struct device **) a; |
|
const struct device *dev_b = *(const struct device **) b; |
|
struct nd_namespace_blk *nsblk_a, *nsblk_b; |
|
struct nd_namespace_pmem *nspm_a, *nspm_b; |
|
|
|
if (is_namespace_io(dev_a)) |
|
return 0; |
|
|
|
if (is_namespace_blk(dev_a)) { |
|
nsblk_a = to_nd_namespace_blk(dev_a); |
|
nsblk_b = to_nd_namespace_blk(dev_b); |
|
|
|
return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start, |
|
sizeof(resource_size_t)); |
|
} |
|
|
|
nspm_a = to_nd_namespace_pmem(dev_a); |
|
nspm_b = to_nd_namespace_pmem(dev_b); |
|
|
|
return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, |
|
sizeof(resource_size_t)); |
|
} |
|
|
|
static struct device **scan_labels(struct nd_region *nd_region) |
|
{ |
|
int i, count = 0; |
|
struct device *dev, **devs = NULL; |
|
struct nd_label_ent *label_ent, *e; |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; |
|
|
|
/* "safe" because create_namespace_pmem() might list_move() label_ent */ |
|
list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { |
|
struct nd_namespace_label *nd_label = label_ent->label; |
|
struct device **__devs; |
|
u32 flags; |
|
|
|
if (!nd_label) |
|
continue; |
|
flags = nsl_get_flags(ndd, nd_label); |
|
if (is_nd_blk(&nd_region->dev) |
|
== !!(flags & NSLABEL_FLAG_LOCAL)) |
|
/* pass, region matches label type */; |
|
else |
|
continue; |
|
|
|
/* skip labels that describe extents outside of the region */ |
|
if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start || |
|
nsl_get_dpa(ndd, nd_label) > map_end) |
|
continue; |
|
|
|
i = add_namespace_resource(nd_region, nd_label, devs, count); |
|
if (i < 0) |
|
goto err; |
|
if (i < count) |
|
continue; |
|
__devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); |
|
if (!__devs) |
|
goto err; |
|
memcpy(__devs, devs, sizeof(dev) * count); |
|
kfree(devs); |
|
devs = __devs; |
|
|
|
if (is_nd_blk(&nd_region->dev)) |
|
dev = create_namespace_blk(nd_region, nd_label, count); |
|
else |
|
dev = create_namespace_pmem(nd_region, nd_mapping, |
|
nd_label); |
|
|
|
if (IS_ERR(dev)) { |
|
switch (PTR_ERR(dev)) { |
|
case -EAGAIN: |
|
/* skip invalid labels */ |
|
continue; |
|
case -ENODEV: |
|
/* fallthrough to seed creation */ |
|
break; |
|
default: |
|
goto err; |
|
} |
|
} else |
|
devs[count++] = dev; |
|
|
|
} |
|
|
|
dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n", |
|
count, is_nd_blk(&nd_region->dev) |
|
? "blk" : "pmem", count == 1 ? "" : "s"); |
|
|
|
if (count == 0) { |
|
/* Publish a zero-sized namespace for userspace to configure. */ |
|
nd_mapping_free_labels(nd_mapping); |
|
|
|
devs = kcalloc(2, sizeof(dev), GFP_KERNEL); |
|
if (!devs) |
|
goto err; |
|
if (is_nd_blk(&nd_region->dev)) { |
|
struct nd_namespace_blk *nsblk; |
|
|
|
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
|
if (!nsblk) |
|
goto err; |
|
dev = &nsblk->common.dev; |
|
dev->type = &namespace_blk_device_type; |
|
} else { |
|
struct nd_namespace_pmem *nspm; |
|
|
|
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
|
if (!nspm) |
|
goto err; |
|
dev = &nspm->nsio.common.dev; |
|
dev->type = &namespace_pmem_device_type; |
|
nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
|
} |
|
dev->parent = &nd_region->dev; |
|
devs[count++] = dev; |
|
} else if (is_memory(&nd_region->dev)) { |
|
/* clean unselected labels */ |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct list_head *l, *e; |
|
LIST_HEAD(list); |
|
int j; |
|
|
|
nd_mapping = &nd_region->mapping[i]; |
|
if (list_empty(&nd_mapping->labels)) { |
|
WARN_ON(1); |
|
continue; |
|
} |
|
|
|
j = count; |
|
list_for_each_safe(l, e, &nd_mapping->labels) { |
|
if (!j--) |
|
break; |
|
list_move_tail(l, &list); |
|
} |
|
nd_mapping_free_labels(nd_mapping); |
|
list_splice_init(&list, &nd_mapping->labels); |
|
} |
|
} |
|
|
|
if (count > 1) |
|
sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); |
|
|
|
return devs; |
|
|
|
err: |
|
if (devs) { |
|
for (i = 0; devs[i]; i++) |
|
if (is_nd_blk(&nd_region->dev)) |
|
namespace_blk_release(devs[i]); |
|
else |
|
namespace_pmem_release(devs[i]); |
|
kfree(devs); |
|
} |
|
return NULL; |
|
} |
|
|
|
static struct device **create_namespaces(struct nd_region *nd_region) |
|
{ |
|
struct nd_mapping *nd_mapping; |
|
struct device **devs; |
|
int i; |
|
|
|
if (nd_region->ndr_mappings == 0) |
|
return NULL; |
|
|
|
/* lock down all mappings while we scan labels */ |
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
nd_mapping = &nd_region->mapping[i]; |
|
mutex_lock_nested(&nd_mapping->lock, i); |
|
} |
|
|
|
devs = scan_labels(nd_region); |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
int reverse = nd_region->ndr_mappings - 1 - i; |
|
|
|
nd_mapping = &nd_region->mapping[reverse]; |
|
mutex_unlock(&nd_mapping->lock); |
|
} |
|
|
|
return devs; |
|
} |
|
|
|
static void deactivate_labels(void *region) |
|
{ |
|
struct nd_region *nd_region = region; |
|
int i; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = nd_mapping->ndd; |
|
struct nvdimm *nvdimm = nd_mapping->nvdimm; |
|
|
|
mutex_lock(&nd_mapping->lock); |
|
nd_mapping_free_labels(nd_mapping); |
|
mutex_unlock(&nd_mapping->lock); |
|
|
|
put_ndd(ndd); |
|
nd_mapping->ndd = NULL; |
|
if (ndd) |
|
atomic_dec(&nvdimm->busy); |
|
} |
|
} |
|
|
|
static int init_active_labels(struct nd_region *nd_region) |
|
{ |
|
int i, rc = 0; |
|
|
|
for (i = 0; i < nd_region->ndr_mappings; i++) { |
|
struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
|
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
|
struct nvdimm *nvdimm = nd_mapping->nvdimm; |
|
struct nd_label_ent *label_ent; |
|
int count, j; |
|
|
|
/* |
|
* If the dimm is disabled then we may need to prevent |
|
* the region from being activated. |
|
*/ |
|
if (!ndd) { |
|
if (test_bit(NDD_LOCKED, &nvdimm->flags)) |
|
/* fail, label data may be unreadable */; |
|
else if (test_bit(NDD_LABELING, &nvdimm->flags)) |
|
/* fail, labels needed to disambiguate dpa */; |
|
else |
|
continue; |
|
|
|
dev_err(&nd_region->dev, "%s: is %s, failing probe\n", |
|
dev_name(&nd_mapping->nvdimm->dev), |
|
test_bit(NDD_LOCKED, &nvdimm->flags) |
|
? "locked" : "disabled"); |
|
rc = -ENXIO; |
|
goto out; |
|
} |
|
nd_mapping->ndd = ndd; |
|
atomic_inc(&nvdimm->busy); |
|
get_ndd(ndd); |
|
|
|
count = nd_label_active_count(ndd); |
|
dev_dbg(ndd->dev, "count: %d\n", count); |
|
if (!count) |
|
continue; |
|
for (j = 0; j < count; j++) { |
|
struct nd_namespace_label *label; |
|
|
|
label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
|
if (!label_ent) |
|
break; |
|
label = nd_label_active(ndd, j); |
|
if (test_bit(NDD_NOBLK, &nvdimm->flags)) { |
|
u32 flags = nsl_get_flags(ndd, label); |
|
|
|
flags &= ~NSLABEL_FLAG_LOCAL; |
|
nsl_set_flags(ndd, label, flags); |
|
} |
|
label_ent->label = label; |
|
|
|
mutex_lock(&nd_mapping->lock); |
|
list_add_tail(&label_ent->list, &nd_mapping->labels); |
|
mutex_unlock(&nd_mapping->lock); |
|
} |
|
|
|
if (j < count) |
|
break; |
|
} |
|
|
|
if (i < nd_region->ndr_mappings) |
|
rc = -ENOMEM; |
|
|
|
out: |
|
if (rc) { |
|
deactivate_labels(nd_region); |
|
return rc; |
|
} |
|
|
|
return devm_add_action_or_reset(&nd_region->dev, deactivate_labels, |
|
nd_region); |
|
} |
|
|
|
int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
|
{ |
|
struct device **devs = NULL; |
|
int i, rc = 0, type; |
|
|
|
*err = 0; |
|
nvdimm_bus_lock(&nd_region->dev); |
|
rc = init_active_labels(nd_region); |
|
if (rc) { |
|
nvdimm_bus_unlock(&nd_region->dev); |
|
return rc; |
|
} |
|
|
|
type = nd_region_to_nstype(nd_region); |
|
switch (type) { |
|
case ND_DEVICE_NAMESPACE_IO: |
|
devs = create_namespace_io(nd_region); |
|
break; |
|
case ND_DEVICE_NAMESPACE_PMEM: |
|
case ND_DEVICE_NAMESPACE_BLK: |
|
devs = create_namespaces(nd_region); |
|
break; |
|
default: |
|
break; |
|
} |
|
nvdimm_bus_unlock(&nd_region->dev); |
|
|
|
if (!devs) |
|
return -ENODEV; |
|
|
|
for (i = 0; devs[i]; i++) { |
|
struct device *dev = devs[i]; |
|
int id; |
|
|
|
if (type == ND_DEVICE_NAMESPACE_BLK) { |
|
struct nd_namespace_blk *nsblk; |
|
|
|
nsblk = to_nd_namespace_blk(dev); |
|
id = ida_simple_get(&nd_region->ns_ida, 0, 0, |
|
GFP_KERNEL); |
|
nsblk->id = id; |
|
} else if (type == ND_DEVICE_NAMESPACE_PMEM) { |
|
struct nd_namespace_pmem *nspm; |
|
|
|
nspm = to_nd_namespace_pmem(dev); |
|
id = ida_simple_get(&nd_region->ns_ida, 0, 0, |
|
GFP_KERNEL); |
|
nspm->id = id; |
|
} else |
|
id = i; |
|
|
|
if (id < 0) |
|
break; |
|
dev_set_name(dev, "namespace%d.%d", nd_region->id, id); |
|
nd_device_register(dev); |
|
} |
|
if (i) |
|
nd_region->ns_seed = devs[0]; |
|
|
|
if (devs[i]) { |
|
int j; |
|
|
|
for (j = i; devs[j]; j++) { |
|
struct device *dev = devs[j]; |
|
|
|
device_initialize(dev); |
|
put_device(dev); |
|
} |
|
*err = j - i; |
|
/* |
|
* All of the namespaces we tried to register failed, so |
|
* fail region activation. |
|
*/ |
|
if (*err == 0) |
|
rc = -ENODEV; |
|
} |
|
kfree(devs); |
|
|
|
if (rc == -ENODEV) |
|
return rc; |
|
|
|
return i; |
|
}
|
|
|