libnvdimm: blk labels and namespace instantiation
A blk label set describes a namespace comprised of one or more discontiguous dpa ranges on a single dimm. They may alias with one or more pmem interleave sets that include the given dimm. This is the runtime/volatile configuration infrastructure for sysfs manipulation of 'alt_name', 'uuid', 'size', and 'sector_size'. A later patch will make these settings persistent by writing back the label(s). Unlike pmem namespaces, multiple blk namespaces can be created per region. Once a blk namespace has been created a new seed device (unconfigured child of a parent blk region) is instantiated. As long as a region has 'available_size' != 0 new child namespaces may be created. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Neil Brown <neilb@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>hifive-unleashed-5.1
Dan Williams
parent
bf9bccc14c
commit
1b40e09a12
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@ -173,6 +173,46 @@ int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
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return 0;
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}
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ssize_t nd_sector_size_show(unsigned long current_lbasize,
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const unsigned long *supported, char *buf)
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{
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ssize_t len = 0;
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int i;
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for (i = 0; supported[i]; i++)
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if (current_lbasize == supported[i])
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len += sprintf(buf + len, "[%ld] ", supported[i]);
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else
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len += sprintf(buf + len, "%ld ", supported[i]);
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len += sprintf(buf + len, "\n");
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return len;
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}
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ssize_t nd_sector_size_store(struct device *dev, const char *buf,
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unsigned long *current_lbasize, const unsigned long *supported)
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{
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unsigned long lbasize;
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int rc, i;
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if (dev->driver)
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return -EBUSY;
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rc = kstrtoul(buf, 0, &lbasize);
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if (rc)
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return rc;
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for (i = 0; supported[i]; i++)
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if (lbasize == supported[i])
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break;
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if (supported[i]) {
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*current_lbasize = lbasize;
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return 0;
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} else {
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return -EINVAL;
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}
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}
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static ssize_t commands_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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@ -289,6 +289,42 @@ struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
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}
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EXPORT_SYMBOL_GPL(nvdimm_create);
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/**
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* nd_blk_available_dpa - account the unused dpa of BLK region
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* @nd_mapping: container of dpa-resource-root + labels
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*
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* Unlike PMEM, BLK namespaces can occupy discontiguous DPA ranges.
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*/
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resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping)
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{
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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resource_size_t map_end, busy = 0, available;
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struct resource *res;
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if (!ndd)
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return 0;
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map_end = nd_mapping->start + nd_mapping->size - 1;
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for_each_dpa_resource(ndd, res)
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if (res->start >= nd_mapping->start && res->start < map_end) {
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resource_size_t end = min(map_end, res->end);
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busy += end - res->start + 1;
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} else if (res->end >= nd_mapping->start
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&& res->end <= map_end) {
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busy += res->end - nd_mapping->start;
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} else if (nd_mapping->start > res->start
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&& nd_mapping->start < res->end) {
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/* total eclipse of the BLK region mapping */
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busy += nd_mapping->size;
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}
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available = map_end - nd_mapping->start + 1;
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if (busy < available)
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return available - busy;
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return 0;
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}
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/**
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* nd_pmem_available_dpa - for the given dimm+region account unallocated dpa
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* @nd_mapping: container of dpa-resource-root + labels
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@ -35,7 +35,15 @@ static void namespace_pmem_release(struct device *dev)
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static void namespace_blk_release(struct device *dev)
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{
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/* TODO: blk namespace support */
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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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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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static struct device_type namespace_io_device_type = {
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@ -88,8 +96,9 @@ static ssize_t __alt_name_store(struct device *dev, const char *buf,
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ns_altname = &nspm->alt_name;
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} else if (is_namespace_blk(dev)) {
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/* TODO: blk namespace support */
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return -ENXIO;
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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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@ -122,6 +131,24 @@ out:
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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->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 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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@ -148,8 +175,9 @@ static ssize_t alt_name_show(struct device *dev,
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ns_altname = nspm->alt_name;
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} else if (is_namespace_blk(dev)) {
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/* TODO: blk namespace support */
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return -ENXIO;
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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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@ -195,6 +223,8 @@ static int scan_free(struct nd_region *nd_region,
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new_start = res->start;
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rc = adjust_resource(res, new_start, resource_size(res) - n);
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if (rc == 0)
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res->flags |= DPA_RESOURCE_ADJUSTED;
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nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc);
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break;
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}
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@ -255,14 +285,15 @@ static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
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return rc ? n : 0;
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}
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static bool space_valid(bool is_pmem, struct nd_label_id *label_id,
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struct resource *res)
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static bool space_valid(bool is_pmem, bool is_reserve,
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struct nd_label_id *label_id, struct resource *res)
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{
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/*
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* For BLK-space any space is valid, for PMEM-space, it must be
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* contiguous with an existing allocation.
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* contiguous with an existing allocation unless we are
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* reserving pmem.
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*/
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if (!is_pmem)
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if (is_reserve || !is_pmem)
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return true;
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if (!res || strcmp(res->name, label_id->id) == 0)
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return true;
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@ -278,6 +309,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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resource_size_t n)
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{
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resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
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bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
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bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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const resource_size_t to_allocate = n;
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@ -303,7 +335,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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if (!first++ && res->start > nd_mapping->start) {
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free_start = nd_mapping->start;
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available = res->start - free_start;
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if (space_valid(is_pmem, label_id, NULL))
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if (space_valid(is_pmem, is_reserve, label_id, NULL))
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loc = ALLOC_BEFORE;
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}
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@ -311,7 +343,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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if (!loc && next) {
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free_start = res->start + resource_size(res);
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free_end = min(mapping_end, next->start - 1);
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if (space_valid(is_pmem, label_id, res)
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if (space_valid(is_pmem, is_reserve, label_id, res)
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&& free_start < free_end) {
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available = free_end + 1 - free_start;
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loc = ALLOC_MID;
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@ -322,7 +354,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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if (!loc && !next) {
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free_start = res->start + resource_size(res);
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free_end = mapping_end;
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if (space_valid(is_pmem, label_id, res)
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if (space_valid(is_pmem, is_reserve, label_id, res)
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&& free_start < free_end) {
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available = free_end + 1 - free_start;
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loc = ALLOC_AFTER;
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@ -336,7 +368,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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case ALLOC_BEFORE:
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if (strcmp(res->name, label_id->id) == 0) {
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/* adjust current resource up */
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if (is_pmem)
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if (is_pmem && !is_reserve)
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return n;
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rc = adjust_resource(res, res->start - allocate,
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resource_size(res) + allocate);
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@ -347,7 +379,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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case ALLOC_MID:
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if (strcmp(next->name, label_id->id) == 0) {
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/* adjust next resource up */
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if (is_pmem)
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if (is_pmem && !is_reserve)
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return n;
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rc = adjust_resource(next, next->start
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- allocate, resource_size(next)
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@ -373,7 +405,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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/* BLK allocate bottom up */
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if (!is_pmem)
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free_start += available - allocate;
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else if (free_start != nd_mapping->start)
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else if (!is_reserve && free_start != nd_mapping->start)
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return n;
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new_res = nvdimm_allocate_dpa(ndd, label_id,
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@ -384,6 +416,8 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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/* adjust current resource down */
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rc = adjust_resource(res, res->start, resource_size(res)
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+ allocate);
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if (rc == 0)
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res->flags |= DPA_RESOURCE_ADJUSTED;
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}
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if (!new_res)
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@ -409,11 +443,108 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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return 0;
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}
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if (is_pmem && n == to_allocate)
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/*
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* If we allocated nothing in the BLK case it may be because we are in
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* an initial "pmem-reserve pass". Only do an initial BLK allocation
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* when none of the DPA space is reserved.
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*/
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if ((is_pmem || !ndd->dpa.child) && n == to_allocate)
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return init_dpa_allocation(label_id, nd_region, nd_mapping, n);
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return n;
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}
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static int merge_dpa(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping, struct nd_label_id *label_id)
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{
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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struct resource *res;
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if (strncmp("pmem", label_id->id, 4) == 0)
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return 0;
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retry:
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for_each_dpa_resource(ndd, res) {
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int rc;
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struct resource *next = res->sibling;
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resource_size_t end = res->start + resource_size(res);
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if (!next || strcmp(res->name, label_id->id) != 0
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|| strcmp(next->name, label_id->id) != 0
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|| end != next->start)
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continue;
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end += resource_size(next);
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nvdimm_free_dpa(ndd, next);
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rc = adjust_resource(res, res->start, end - res->start);
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nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc);
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if (rc)
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return rc;
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res->flags |= DPA_RESOURCE_ADJUSTED;
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goto retry;
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}
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return 0;
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}
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static int __reserve_free_pmem(struct device *dev, void *data)
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{
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struct nvdimm *nvdimm = data;
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struct nd_region *nd_region;
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struct nd_label_id label_id;
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int i;
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if (!is_nd_pmem(dev))
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return 0;
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nd_region = to_nd_region(dev);
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if (nd_region->ndr_mappings == 0)
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return 0;
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memset(&label_id, 0, sizeof(label_id));
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strcat(label_id.id, "pmem-reserve");
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for (i = 0; i < nd_region->ndr_mappings; i++) {
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struct nd_mapping *nd_mapping = &nd_region->mapping[i];
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resource_size_t n, rem = 0;
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if (nd_mapping->nvdimm != nvdimm)
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continue;
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n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem);
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if (n == 0)
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return 0;
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rem = scan_allocate(nd_region, nd_mapping, &label_id, n);
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dev_WARN_ONCE(&nd_region->dev, rem,
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"pmem reserve underrun: %#llx of %#llx bytes\n",
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(unsigned long long) n - rem,
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(unsigned long long) n);
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return rem ? -ENXIO : 0;
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}
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return 0;
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}
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static void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
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struct nd_mapping *nd_mapping)
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{
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struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
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struct resource *res, *_res;
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for_each_dpa_resource_safe(ndd, res, _res)
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if (strcmp(res->name, "pmem-reserve") == 0)
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nvdimm_free_dpa(ndd, res);
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}
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static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus,
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struct nd_mapping *nd_mapping)
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{
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struct nvdimm *nvdimm = nd_mapping->nvdimm;
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int rc;
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rc = device_for_each_child(&nvdimm_bus->dev, nvdimm,
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__reserve_free_pmem);
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if (rc)
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release_free_pmem(nvdimm_bus, nd_mapping);
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return rc;
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}
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/**
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* grow_dpa_allocation - for each dimm allocate n bytes for @label_id
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* @nd_region: the set of dimms to allocate @n more bytes from
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@ -430,13 +561,45 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
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static int grow_dpa_allocation(struct nd_region *nd_region,
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struct nd_label_id *label_id, resource_size_t n)
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{
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struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
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bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
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int i;
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for (i = 0; i < nd_region->ndr_mappings; i++) {
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struct nd_mapping *nd_mapping = &nd_region->mapping[i];
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int rc;
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resource_size_t rem = n;
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int rc, j;
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rc = scan_allocate(nd_region, nd_mapping, label_id, n);
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/*
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* In the BLK case try once with all unallocated PMEM
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* reserved, and once without
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*/
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for (j = is_pmem; j < 2; j++) {
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bool blk_only = j == 0;
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if (blk_only) {
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rc = reserve_free_pmem(nvdimm_bus, nd_mapping);
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if (rc)
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return rc;
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}
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rem = scan_allocate(nd_region, nd_mapping,
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label_id, rem);
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if (blk_only)
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release_free_pmem(nvdimm_bus, nd_mapping);
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/* try again and allow encroachments into PMEM */
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if (rem == 0)
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break;
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}
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dev_WARN_ONCE(&nd_region->dev, rem,
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"allocation underrun: %#llx of %#llx bytes\n",
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(unsigned long long) n - rem,
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(unsigned long long) n);
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if (rem)
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return -ENXIO;
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rc = merge_dpa(nd_region, nd_mapping, label_id);
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if (rc)
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return rc;
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}
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@ -472,8 +635,10 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
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uuid = nspm->uuid;
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} else if (is_namespace_blk(dev)) {
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/* TODO: blk namespace support */
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return -ENXIO;
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struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
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|
||||
uuid = nsblk->uuid;
|
||||
flags = NSLABEL_FLAG_LOCAL;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -528,6 +693,14 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
|
|||
|
||||
nd_namespace_pmem_set_size(nd_region, nspm,
|
||||
val * nd_region->ndr_mappings);
|
||||
} else if (is_namespace_blk(dev)) {
|
||||
/*
|
||||
* Try to delete the namespace if we deleted all of its
|
||||
* allocation and this is not the seed device for the
|
||||
* region.
|
||||
*/
|
||||
if (val == 0 && nd_region->ns_seed != dev)
|
||||
nd_device_unregister(dev, ND_ASYNC);
|
||||
}
|
||||
|
||||
return rc;
|
||||
|
|
@ -554,8 +727,9 @@ static ssize_t size_store(struct device *dev,
|
|||
|
||||
uuid = &nspm->uuid;
|
||||
} else if (is_namespace_blk(dev)) {
|
||||
/* TODO: blk namespace support */
|
||||
rc = -ENXIO;
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
|
||||
uuid = &nsblk->uuid;
|
||||
}
|
||||
|
||||
if (rc == 0 && val == 0 && uuid) {
|
||||
|
|
@ -576,21 +750,23 @@ static ssize_t size_store(struct device *dev,
|
|||
static ssize_t size_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
unsigned long long size = 0;
|
||||
|
||||
nvdimm_bus_lock(dev);
|
||||
if (is_namespace_pmem(dev)) {
|
||||
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
|
||||
|
||||
return sprintf(buf, "%llu\n", (unsigned long long)
|
||||
resource_size(&nspm->nsio.res));
|
||||
size = resource_size(&nspm->nsio.res);
|
||||
} else if (is_namespace_blk(dev)) {
|
||||
/* TODO: blk namespace support */
|
||||
return -ENXIO;
|
||||
size = 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 sprintf(buf, "%llu\n", (unsigned long long)
|
||||
resource_size(&nsio->res));
|
||||
} else
|
||||
return -ENXIO;
|
||||
size = resource_size(&nsio->res);
|
||||
}
|
||||
nvdimm_bus_unlock(dev);
|
||||
|
||||
return sprintf(buf, "%llu\n", size);
|
||||
}
|
||||
static DEVICE_ATTR(size, S_IRUGO, size_show, size_store);
|
||||
|
||||
|
|
@ -604,8 +780,9 @@ static ssize_t uuid_show(struct device *dev,
|
|||
|
||||
uuid = nspm->uuid;
|
||||
} else if (is_namespace_blk(dev)) {
|
||||
/* TODO: blk namespace support */
|
||||
return -ENXIO;
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
|
||||
uuid = nsblk->uuid;
|
||||
} else
|
||||
return -ENXIO;
|
||||
|
||||
|
|
@ -669,8 +846,9 @@ static ssize_t uuid_store(struct device *dev,
|
|||
|
||||
ns_uuid = &nspm->uuid;
|
||||
} else if (is_namespace_blk(dev)) {
|
||||
/* TODO: blk namespace support */
|
||||
return -ENXIO;
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
|
||||
ns_uuid = &nsblk->uuid;
|
||||
} else
|
||||
return -ENXIO;
|
||||
|
||||
|
|
@ -712,12 +890,48 @@ static ssize_t resource_show(struct device *dev,
|
|||
}
|
||||
static DEVICE_ATTR_RO(resource);
|
||||
|
||||
static const unsigned long ns_lbasize_supported[] = { 512, 0 };
|
||||
|
||||
static ssize_t sector_size_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
|
||||
if (!is_namespace_blk(dev))
|
||||
return -ENXIO;
|
||||
|
||||
return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf);
|
||||
}
|
||||
|
||||
static ssize_t sector_size_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t len)
|
||||
{
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
ssize_t rc;
|
||||
|
||||
if (!is_namespace_blk(dev))
|
||||
return -ENXIO;
|
||||
|
||||
device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
rc = nd_sector_size_store(dev, buf, &nsblk->lbasize,
|
||||
ns_lbasize_supported);
|
||||
dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
|
||||
rc, buf, buf[len - 1] == '\n' ? "" : "\n");
|
||||
nvdimm_bus_unlock(dev);
|
||||
device_unlock(dev);
|
||||
|
||||
return rc ? rc : len;
|
||||
}
|
||||
static DEVICE_ATTR_RW(sector_size);
|
||||
|
||||
static struct attribute *nd_namespace_attributes[] = {
|
||||
&dev_attr_nstype.attr,
|
||||
&dev_attr_size.attr,
|
||||
&dev_attr_uuid.attr,
|
||||
&dev_attr_resource.attr,
|
||||
&dev_attr_alt_name.attr,
|
||||
&dev_attr_sector_size.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
|
|
@ -735,6 +949,10 @@ static umode_t namespace_visible(struct kobject *kobj,
|
|||
if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {
|
||||
if (a == &dev_attr_size.attr)
|
||||
return S_IWUSR | S_IRUGO;
|
||||
|
||||
if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr)
|
||||
return 0;
|
||||
|
||||
return a->mode;
|
||||
}
|
||||
|
||||
|
|
@ -1022,6 +1240,176 @@ static struct device **create_namespace_pmem(struct nd_region *nd_region)
|
|||
return NULL;
|
||||
}
|
||||
|
||||
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->dev;
|
||||
dev->type = &namespace_blk_device_type;
|
||||
nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
|
||||
if (nsblk->id < 0) {
|
||||
kfree(nsblk);
|
||||
return NULL;
|
||||
}
|
||||
dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id);
|
||||
dev->parent = &nd_region->dev;
|
||||
dev->groups = nd_namespace_attribute_groups;
|
||||
|
||||
return &nsblk->dev;
|
||||
}
|
||||
|
||||
void nd_region_create_blk_seed(struct nd_region *nd_region)
|
||||
{
|
||||
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
|
||||
nd_region->ns_seed = nd_namespace_blk_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 blk namespace\n");
|
||||
else
|
||||
nd_device_register(nd_region->ns_seed);
|
||||
}
|
||||
|
||||
static struct device **create_namespace_blk(struct nd_region *nd_region)
|
||||
{
|
||||
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
|
||||
struct nd_namespace_label *nd_label;
|
||||
struct device *dev, **devs = NULL;
|
||||
struct nd_namespace_blk *nsblk;
|
||||
struct nvdimm_drvdata *ndd;
|
||||
int i, l, count = 0;
|
||||
struct resource *res;
|
||||
|
||||
if (nd_region->ndr_mappings == 0)
|
||||
return NULL;
|
||||
|
||||
ndd = to_ndd(nd_mapping);
|
||||
for_each_label(l, nd_label, nd_mapping->labels) {
|
||||
u32 flags = __le32_to_cpu(nd_label->flags);
|
||||
char *name[NSLABEL_NAME_LEN];
|
||||
struct device **__devs;
|
||||
|
||||
if (flags & NSLABEL_FLAG_LOCAL)
|
||||
/* pass */;
|
||||
else
|
||||
continue;
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
nsblk = to_nd_namespace_blk(devs[i]);
|
||||
if (memcmp(nsblk->uuid, nd_label->uuid,
|
||||
NSLABEL_UUID_LEN) == 0) {
|
||||
res = nsblk_add_resource(nd_region, ndd, nsblk,
|
||||
__le64_to_cpu(nd_label->dpa));
|
||||
if (!res)
|
||||
goto err;
|
||||
nd_dbg_dpa(nd_region, ndd, res, "%s assign\n",
|
||||
dev_name(&nsblk->dev));
|
||||
break;
|
||||
}
|
||||
}
|
||||
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;
|
||||
|
||||
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
|
||||
if (!nsblk)
|
||||
goto err;
|
||||
dev = &nsblk->dev;
|
||||
dev->type = &namespace_blk_device_type;
|
||||
dev->parent = &nd_region->dev;
|
||||
dev_set_name(dev, "namespace%d.%d", nd_region->id, count);
|
||||
devs[count++] = dev;
|
||||
nsblk->id = -1;
|
||||
nsblk->lbasize = __le64_to_cpu(nd_label->lbasize);
|
||||
nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN,
|
||||
GFP_KERNEL);
|
||||
if (!nsblk->uuid)
|
||||
goto err;
|
||||
memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
|
||||
if (name[0])
|
||||
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
|
||||
GFP_KERNEL);
|
||||
res = nsblk_add_resource(nd_region, ndd, nsblk,
|
||||
__le64_to_cpu(nd_label->dpa));
|
||||
if (!res)
|
||||
goto err;
|
||||
nd_dbg_dpa(nd_region, ndd, res, "%s assign\n",
|
||||
dev_name(&nsblk->dev));
|
||||
}
|
||||
|
||||
dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n",
|
||||
__func__, count, count == 1 ? "" : "s");
|
||||
|
||||
if (count == 0) {
|
||||
/* Publish a zero-sized namespace for userspace to configure. */
|
||||
for (i = 0; i < nd_region->ndr_mappings; i++) {
|
||||
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
|
||||
|
||||
kfree(nd_mapping->labels);
|
||||
nd_mapping->labels = NULL;
|
||||
}
|
||||
|
||||
devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
|
||||
if (!devs)
|
||||
goto err;
|
||||
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
|
||||
if (!nsblk)
|
||||
goto err;
|
||||
dev = &nsblk->dev;
|
||||
dev->type = &namespace_blk_device_type;
|
||||
dev->parent = &nd_region->dev;
|
||||
devs[count++] = dev;
|
||||
}
|
||||
|
||||
return devs;
|
||||
|
||||
err:
|
||||
for (i = 0; i < count; i++) {
|
||||
nsblk = to_nd_namespace_blk(devs[i]);
|
||||
namespace_blk_release(&nsblk->dev);
|
||||
}
|
||||
kfree(devs);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int init_active_labels(struct nd_region *nd_region)
|
||||
{
|
||||
int i;
|
||||
|
|
@ -1087,6 +1475,9 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
|
|||
case ND_DEVICE_NAMESPACE_PMEM:
|
||||
devs = create_namespace_pmem(nd_region);
|
||||
break;
|
||||
case ND_DEVICE_NAMESPACE_BLK:
|
||||
devs = create_namespace_blk(nd_region);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
|
@ -1095,15 +1486,50 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
|
|||
if (!devs)
|
||||
return -ENODEV;
|
||||
|
||||
nd_region->ns_seed = devs[0];
|
||||
for (i = 0; devs[i]; i++) {
|
||||
struct device *dev = devs[i];
|
||||
int id;
|
||||
|
||||
dev_set_name(dev, "namespace%d.%d", nd_region->id, i);
|
||||
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
|
||||
id = i;
|
||||
|
||||
if (id < 0)
|
||||
break;
|
||||
dev_set_name(dev, "namespace%d.%d", nd_region->id, id);
|
||||
dev->groups = nd_namespace_attribute_groups;
|
||||
nd_device_register(dev);
|
||||
}
|
||||
if (i)
|
||||
nd_region->ns_seed = devs[0];
|
||||
|
||||
if (devs[i]) {
|
||||
int j;
|
||||
|
||||
for (j = i; devs[j]; j++) {
|
||||
struct device *dev = devs[j];
|
||||
|
||||
device_initialize(dev);
|
||||
put_device(dev);
|
||||
}
|
||||
*err = j - i;
|
||||
/*
|
||||
* All of the namespaces we tried to register failed, so
|
||||
* fail region activation.
|
||||
*/
|
||||
if (*err == 0)
|
||||
rc = -ENODEV;
|
||||
}
|
||||
kfree(devs);
|
||||
|
||||
if (rc == -ENODEV)
|
||||
return rc;
|
||||
|
||||
return i;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@
|
|||
#include <linux/libnvdimm.h>
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/nd.h>
|
||||
|
||||
extern struct list_head nvdimm_bus_list;
|
||||
extern struct mutex nvdimm_bus_list_mutex;
|
||||
|
|
@ -48,6 +49,8 @@ struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
|
|||
int __init nvdimm_bus_init(void);
|
||||
void nvdimm_bus_exit(void);
|
||||
void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
|
||||
struct nd_region;
|
||||
void nd_region_create_blk_seed(struct nd_region *nd_region);
|
||||
void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev);
|
||||
int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus);
|
||||
void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
|
||||
|
|
@ -64,8 +67,13 @@ struct nvdimm_drvdata;
|
|||
struct nd_mapping;
|
||||
resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
|
||||
struct nd_mapping *nd_mapping, resource_size_t *overlap);
|
||||
resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping);
|
||||
resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
|
||||
resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
|
||||
struct nd_label_id *label_id);
|
||||
struct nd_mapping;
|
||||
struct resource *nsblk_add_resource(struct nd_region *nd_region,
|
||||
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
|
||||
resource_size_t start);
|
||||
void get_ndd(struct nvdimm_drvdata *ndd);
|
||||
#endif /* __ND_CORE_H__ */
|
||||
|
|
|
|||
|
|
@ -73,6 +73,7 @@ static inline struct nd_namespace_index *to_next_namespace_index(
|
|||
|
||||
struct nd_region {
|
||||
struct device dev;
|
||||
struct ida ns_ida;
|
||||
struct device *ns_seed;
|
||||
u16 ndr_mappings;
|
||||
u64 ndr_size;
|
||||
|
|
@ -102,6 +103,10 @@ void nd_device_register(struct device *dev);
|
|||
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
|
||||
int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
|
||||
size_t len);
|
||||
ssize_t nd_sector_size_show(unsigned long current_lbasize,
|
||||
const unsigned long *supported, char *buf);
|
||||
ssize_t nd_sector_size_store(struct device *dev, const char *buf,
|
||||
unsigned long *current_lbasize, const unsigned long *supported);
|
||||
int __init nvdimm_init(void);
|
||||
int __init nd_region_init(void);
|
||||
void nvdimm_exit(void);
|
||||
|
|
|
|||
|
|
@ -118,7 +118,12 @@ static int is_uuid_busy(struct device *dev, void *data)
|
|||
break;
|
||||
}
|
||||
case ND_DEVICE_NAMESPACE_BLK: {
|
||||
/* TODO: blk namespace support */
|
||||
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
|
||||
|
||||
if (!nsblk->uuid)
|
||||
break;
|
||||
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) == 0)
|
||||
return -EBUSY;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
|
|
@ -230,7 +235,7 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region)
|
|||
goto retry;
|
||||
}
|
||||
} else if (is_nd_blk(&nd_region->dev)) {
|
||||
/* TODO: BLK Namespace support */
|
||||
available += nd_blk_available_dpa(nd_mapping);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -360,6 +365,13 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
|
|||
nd_mapping->ndd = NULL;
|
||||
atomic_dec(&nvdimm->busy);
|
||||
}
|
||||
} else if (dev->parent && is_nd_blk(dev->parent) && probe) {
|
||||
struct nd_region *nd_region = to_nd_region(dev->parent);
|
||||
|
||||
nvdimm_bus_lock(dev);
|
||||
if (nd_region->ns_seed == dev)
|
||||
nd_region_create_blk_seed(nd_region);
|
||||
nvdimm_bus_unlock(dev);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -533,6 +545,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
|
|||
nd_region->ndr_mappings = ndr_desc->num_mappings;
|
||||
nd_region->provider_data = ndr_desc->provider_data;
|
||||
nd_region->nd_set = ndr_desc->nd_set;
|
||||
ida_init(&nd_region->ns_ida);
|
||||
dev = &nd_region->dev;
|
||||
dev_set_name(dev, "region%d", nd_region->id);
|
||||
dev->parent = &nvdimm_bus->dev;
|
||||
|
|
|
|||
|
|
@ -27,6 +27,9 @@ enum {
|
|||
ND_CMD_MAX_ENVELOPE = 16,
|
||||
ND_CMD_ARS_STATUS_MAX = SZ_4K,
|
||||
ND_MAX_MAPPINGS = 32,
|
||||
|
||||
/* mark newly adjusted resources as requiring a label update */
|
||||
DPA_RESOURCE_ADJUSTED = 1 << 0,
|
||||
};
|
||||
|
||||
extern struct attribute_group nvdimm_bus_attribute_group;
|
||||
|
|
|
|||
|
|
@ -50,6 +50,26 @@ struct nd_namespace_pmem {
|
|||
u8 *uuid;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nd_namespace_blk - namespace for dimm-bounded persistent memory
|
||||
* @dev: namespace device creation by the nd region driver
|
||||
* @alt_name: namespace name supplied in the dimm label
|
||||
* @uuid: namespace name supplied in the dimm label
|
||||
* @id: ida allocated id
|
||||
* @lbasize: blk namespaces have a native sector size when btt not present
|
||||
* @num_resources: number of dpa extents to claim
|
||||
* @res: discontiguous dpa extents for given dimm
|
||||
*/
|
||||
struct nd_namespace_blk {
|
||||
struct device dev;
|
||||
char *alt_name;
|
||||
u8 *uuid;
|
||||
int id;
|
||||
unsigned long lbasize;
|
||||
int num_resources;
|
||||
struct resource **res;
|
||||
};
|
||||
|
||||
static inline struct nd_namespace_io *to_nd_namespace_io(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct nd_namespace_io, dev);
|
||||
|
|
@ -62,6 +82,11 @@ static inline struct nd_namespace_pmem *to_nd_namespace_pmem(struct device *dev)
|
|||
return container_of(nsio, struct nd_namespace_pmem, nsio);
|
||||
}
|
||||
|
||||
static inline struct nd_namespace_blk *to_nd_namespace_blk(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct nd_namespace_blk, dev);
|
||||
}
|
||||
|
||||
#define MODULE_ALIAS_ND_DEVICE(type) \
|
||||
MODULE_ALIAS("nd:t" __stringify(type) "*")
|
||||
#define ND_DEVICE_MODALIAS_FMT "nd:t%d"
|
||||
|
|
|
|||
Loading…
Reference in New Issue