diff options
Diffstat (limited to 'drivers/nvdimm/label.c')
| -rw-r--r-- | drivers/nvdimm/label.c | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 5ec9a4023df9..8c972bcb2ac3 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -968,326 +968,6 @@ static int __pmem_label_update(struct nd_region *nd_region, return rc; } -static bool is_old_resource(struct resource *res, struct resource **list, int n) -{ - int i; - - if (res->flags & DPA_RESOURCE_ADJUSTED) - return false; - for (i = 0; i < n; i++) - if (res == list[i]) - return true; - return false; -} - -static struct resource *to_resource(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label) -{ - struct resource *res; - - for_each_dpa_resource(ndd, res) { - if (res->start != nsl_get_dpa(ndd, nd_label)) - continue; - if (resource_size(res) != nsl_get_rawsize(ndd, nd_label)) - continue; - return res; - } - - return NULL; -} - -/* - * Use the presence of the type_guid as a flag to determine isetcookie - * usage and nlabel + position policy for blk-aperture namespaces. - */ -static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - u64 isetcookie) -{ - if (efi_namespace_label_has(ndd, type_guid)) { - nsl_set_isetcookie(ndd, nd_label, isetcookie); - return; - } - nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */ -} - -bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - u64 isetcookie) -{ - if (!efi_namespace_label_has(ndd, type_guid)) - return true; - - if (nsl_get_isetcookie(ndd, nd_label) != isetcookie) { - dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", isetcookie, - nsl_get_isetcookie(ndd, nd_label)); - return false; - } - - return true; -} - -static void nsl_set_blk_nlabel(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, int nlabel, - bool first) -{ - if (!efi_namespace_label_has(ndd, type_guid)) { - nsl_set_nlabel(ndd, nd_label, 0); /* N/A */ - return; - } - nsl_set_nlabel(ndd, nd_label, first ? nlabel : 0xffff); -} - -static void nsl_set_blk_position(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - bool first) -{ - if (!efi_namespace_label_has(ndd, type_guid)) { - nsl_set_position(ndd, nd_label, 0); - return; - } - nsl_set_position(ndd, nd_label, first ? 0 : 0xffff); -} - -/* - * 1/ Account all the labels that can be freed after this update - * 2/ Allocate and write the label to the staging (next) index - * 3/ Record the resources in the namespace device - */ -static int __blk_label_update(struct nd_region *nd_region, - struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, - int num_labels) -{ - int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; - struct nd_interleave_set *nd_set = nd_region->nd_set; - struct nd_namespace_common *ndns = &nsblk->common; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_namespace_label *nd_label; - struct nd_label_ent *label_ent, *e; - struct nd_namespace_index *nsindex; - unsigned long *free, *victim_map = NULL; - struct resource *res, **old_res_list; - struct nd_label_id label_id; - int min_dpa_idx = 0; - LIST_HEAD(list); - u32 nslot, slot; - - if (!preamble_next(ndd, &nsindex, &free, &nslot)) - return -ENXIO; - - old_res_list = nsblk->res; - nfree = nd_label_nfree(ndd); - old_num_resources = nsblk->num_resources; - nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); - - /* - * We need to loop over the old resources a few times, which seems a - * bit inefficient, but we need to know that we have the label - * space before we start mutating the tracking structures. - * Otherwise the recovery method of last resort for userspace is - * disable and re-enable the parent region. - */ - alloc = 0; - for_each_dpa_resource(ndd, res) { - if (strcmp(res->name, label_id.id) != 0) - continue; - if (!is_old_resource(res, old_res_list, old_num_resources)) - alloc++; - } - - victims = 0; - if (old_num_resources) { - /* convert old local-label-map to dimm-slot victim-map */ - victim_map = bitmap_zalloc(nslot, GFP_KERNEL); - if (!victim_map) - return -ENOMEM; - - /* mark unused labels for garbage collection */ - for_each_clear_bit_le(slot, free, nslot) { - nd_label = to_label(ndd, slot); - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - res = to_resource(ndd, nd_label); - if (res && is_old_resource(res, old_res_list, - old_num_resources)) - continue; - slot = to_slot(ndd, nd_label); - set_bit(slot, victim_map); - victims++; - } - } - - /* don't allow updates that consume the last label */ - if (nfree - alloc < 0 || nfree - alloc + victims < 1) { - dev_info(&nsblk->common.dev, "insufficient label space\n"); - bitmap_free(victim_map); - return -ENOSPC; - } - /* from here on we need to abort on error */ - - - /* assign all resources to the namespace before writing the labels */ - nsblk->res = NULL; - nsblk->num_resources = 0; - for_each_dpa_resource(ndd, res) { - if (strcmp(res->name, label_id.id) != 0) - continue; - if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { - rc = -ENOMEM; - goto abort; - } - } - - /* release slots associated with any invalidated UUIDs */ - mutex_lock(&nd_mapping->lock); - list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) - if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags)) { - reap_victim(nd_mapping, label_ent); - list_move(&label_ent->list, &list); - } - mutex_unlock(&nd_mapping->lock); - - /* - * Find the resource associated with the first label in the set - * per the v1.2 namespace specification. - */ - for (i = 0; i < nsblk->num_resources; i++) { - struct resource *min = nsblk->res[min_dpa_idx]; - - res = nsblk->res[i]; - if (res->start < min->start) - min_dpa_idx = i; - } - - for (i = 0; i < nsblk->num_resources; i++) { - size_t offset; - - res = nsblk->res[i]; - if (is_old_resource(res, old_res_list, old_num_resources)) - continue; /* carry-over */ - slot = nd_label_alloc_slot(ndd); - if (slot == UINT_MAX) { - rc = -ENXIO; - goto abort; - } - dev_dbg(ndd->dev, "allocated: %d\n", slot); - - nd_label = to_label(ndd, slot); - memset(nd_label, 0, sizeof_namespace_label(ndd)); - nsl_set_uuid(ndd, nd_label, nsblk->uuid); - nsl_set_name(ndd, nd_label, nsblk->alt_name); - nsl_set_flags(ndd, nd_label, NSLABEL_FLAG_LOCAL); - - nsl_set_blk_nlabel(ndd, nd_label, nsblk->num_resources, - i == min_dpa_idx); - nsl_set_blk_position(ndd, nd_label, i == min_dpa_idx); - nsl_set_blk_isetcookie(ndd, nd_label, nd_set->cookie2); - - nsl_set_dpa(ndd, nd_label, res->start); - nsl_set_rawsize(ndd, nd_label, resource_size(res)); - nsl_set_lbasize(ndd, nd_label, nsblk->lbasize); - nsl_set_slot(ndd, nd_label, slot); - nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid); - nsl_set_claim_class(ndd, nd_label, ndns->claim_class); - nsl_calculate_checksum(ndd, nd_label); - - /* update label */ - offset = nd_label_offset(ndd, nd_label); - rc = nvdimm_set_config_data(ndd, offset, nd_label, - sizeof_namespace_label(ndd)); - if (rc < 0) - goto abort; - } - - /* free up now unused slots in the new index */ - for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { - dev_dbg(ndd->dev, "free: %d\n", slot); - nd_label_free_slot(ndd, slot); - } - - /* update index */ - rc = nd_label_write_index(ndd, ndd->ns_next, - nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); - if (rc) - goto abort; - - /* - * Now that the on-dimm labels are up to date, fix up the tracking - * entries in nd_mapping->labels - */ - nlabel = 0; - mutex_lock(&nd_mapping->lock); - list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { - nd_label = label_ent->label; - if (!nd_label) - continue; - nlabel++; - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - nlabel--; - list_move(&label_ent->list, &list); - label_ent->label = NULL; - } - list_splice_tail_init(&list, &nd_mapping->labels); - mutex_unlock(&nd_mapping->lock); - - if (nlabel + nsblk->num_resources > num_labels) { - /* - * Bug, we can't end up with more resources than - * available labels - */ - WARN_ON_ONCE(1); - rc = -ENXIO; - goto out; - } - - mutex_lock(&nd_mapping->lock); - label_ent = list_first_entry_or_null(&nd_mapping->labels, - typeof(*label_ent), list); - if (!label_ent) { - WARN_ON(1); - mutex_unlock(&nd_mapping->lock); - rc = -ENXIO; - goto out; - } - for_each_clear_bit_le(slot, free, nslot) { - nd_label = to_label(ndd, slot); - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - res = to_resource(ndd, nd_label); - res->flags &= ~DPA_RESOURCE_ADJUSTED; - dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); - list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { - if (label_ent->label) - continue; - label_ent->label = nd_label; - nd_label = NULL; - break; - } - if (nd_label) - dev_WARN(&nsblk->common.dev, - "failed to track label slot%d\n", slot); - } - mutex_unlock(&nd_mapping->lock); - - out: - kfree(old_res_list); - bitmap_free(victim_map); - return rc; - - abort: - /* - * 1/ repair the allocated label bitmap in the index - * 2/ restore the resource list - */ - nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); - kfree(nsblk->res); - nsblk->res = old_res_list; - nsblk->num_resources = old_num_resources; - old_res_list = NULL; - goto out; -} - static int init_labels(struct nd_mapping *nd_mapping, int num_labels) { int i, old_num_labels = 0; @@ -1425,26 +1105,6 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region, return 0; } -int nd_blk_namespace_label_update(struct nd_region *nd_region, - struct nd_namespace_blk *nsblk, resource_size_t size) -{ - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct resource *res; - int count = 0; - - if (size == 0) - return del_labels(nd_mapping, nsblk->uuid); - - for_each_dpa_resource(to_ndd(nd_mapping), res) - count++; - - count = init_labels(nd_mapping, count); - if (count < 0) - return count; - - return __blk_label_update(nd_region, nd_mapping, nsblk, count); -} - int __init nd_label_init(void) { WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); |