Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/nd.h> |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 17 | #include "nd-core.h" |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 18 | #include "nd.h" |
| 19 | |
| 20 | static void namespace_io_release(struct device *dev) |
| 21 | { |
| 22 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 23 | |
| 24 | kfree(nsio); |
| 25 | } |
| 26 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 27 | static void namespace_pmem_release(struct device *dev) |
| 28 | { |
| 29 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 30 | |
| 31 | kfree(nspm->alt_name); |
| 32 | kfree(nspm->uuid); |
| 33 | kfree(nspm); |
| 34 | } |
| 35 | |
| 36 | static void namespace_blk_release(struct device *dev) |
| 37 | { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 38 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 39 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 40 | |
| 41 | if (nsblk->id >= 0) |
| 42 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); |
| 43 | kfree(nsblk->alt_name); |
| 44 | kfree(nsblk->uuid); |
| 45 | kfree(nsblk->res); |
| 46 | kfree(nsblk); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 47 | } |
| 48 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 49 | static struct device_type namespace_io_device_type = { |
| 50 | .name = "nd_namespace_io", |
| 51 | .release = namespace_io_release, |
| 52 | }; |
| 53 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 54 | static struct device_type namespace_pmem_device_type = { |
| 55 | .name = "nd_namespace_pmem", |
| 56 | .release = namespace_pmem_release, |
| 57 | }; |
| 58 | |
| 59 | static struct device_type namespace_blk_device_type = { |
| 60 | .name = "nd_namespace_blk", |
| 61 | .release = namespace_blk_release, |
| 62 | }; |
| 63 | |
| 64 | static bool is_namespace_pmem(struct device *dev) |
| 65 | { |
| 66 | return dev ? dev->type == &namespace_pmem_device_type : false; |
| 67 | } |
| 68 | |
| 69 | static bool is_namespace_blk(struct device *dev) |
| 70 | { |
| 71 | return dev ? dev->type == &namespace_blk_device_type : false; |
| 72 | } |
| 73 | |
| 74 | static bool is_namespace_io(struct device *dev) |
| 75 | { |
| 76 | return dev ? dev->type == &namespace_io_device_type : false; |
| 77 | } |
| 78 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 79 | static ssize_t nstype_show(struct device *dev, |
| 80 | struct device_attribute *attr, char *buf) |
| 81 | { |
| 82 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 83 | |
| 84 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); |
| 85 | } |
| 86 | static DEVICE_ATTR_RO(nstype); |
| 87 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 88 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
| 89 | const size_t len) |
| 90 | { |
| 91 | char *input, *pos, *alt_name, **ns_altname; |
| 92 | ssize_t rc; |
| 93 | |
| 94 | if (is_namespace_pmem(dev)) { |
| 95 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 96 | |
| 97 | ns_altname = &nspm->alt_name; |
| 98 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 99 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 100 | |
| 101 | ns_altname = &nsblk->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 102 | } else |
| 103 | return -ENXIO; |
| 104 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 105 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 106 | return -EBUSY; |
| 107 | |
| 108 | input = kmemdup(buf, len + 1, GFP_KERNEL); |
| 109 | if (!input) |
| 110 | return -ENOMEM; |
| 111 | |
| 112 | input[len] = '\0'; |
| 113 | pos = strim(input); |
| 114 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { |
| 115 | rc = -EINVAL; |
| 116 | goto out; |
| 117 | } |
| 118 | |
| 119 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); |
| 120 | if (!alt_name) { |
| 121 | rc = -ENOMEM; |
| 122 | goto out; |
| 123 | } |
| 124 | kfree(*ns_altname); |
| 125 | *ns_altname = alt_name; |
| 126 | sprintf(*ns_altname, "%s", pos); |
| 127 | rc = len; |
| 128 | |
| 129 | out: |
| 130 | kfree(input); |
| 131 | return rc; |
| 132 | } |
| 133 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 134 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
| 135 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 136 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 137 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 138 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 139 | struct nd_label_id label_id; |
| 140 | resource_size_t size = 0; |
| 141 | struct resource *res; |
| 142 | |
| 143 | if (!nsblk->uuid) |
| 144 | return 0; |
| 145 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
| 146 | for_each_dpa_resource(ndd, res) |
| 147 | if (strcmp(res->name, label_id.id) == 0) |
| 148 | size += resource_size(res); |
| 149 | return size; |
| 150 | } |
| 151 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 152 | static int nd_namespace_label_update(struct nd_region *nd_region, |
| 153 | struct device *dev) |
| 154 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 155 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 156 | "namespace must be idle during label update\n"); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 157 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 158 | return 0; |
| 159 | |
| 160 | /* |
| 161 | * Only allow label writes that will result in a valid namespace |
| 162 | * or deletion of an existing namespace. |
| 163 | */ |
| 164 | if (is_namespace_pmem(dev)) { |
| 165 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 166 | resource_size_t size = resource_size(&nspm->nsio.res); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 167 | |
| 168 | if (size == 0 && nspm->uuid) |
| 169 | /* delete allocation */; |
| 170 | else if (!nspm->uuid) |
| 171 | return 0; |
| 172 | |
| 173 | return nd_pmem_namespace_label_update(nd_region, nspm, size); |
| 174 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 175 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 176 | resource_size_t size = nd_namespace_blk_size(nsblk); |
| 177 | |
| 178 | if (size == 0 && nsblk->uuid) |
| 179 | /* delete allocation */; |
| 180 | else if (!nsblk->uuid || !nsblk->lbasize) |
| 181 | return 0; |
| 182 | |
| 183 | return nd_blk_namespace_label_update(nd_region, nsblk, size); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 184 | } else |
| 185 | return -ENXIO; |
| 186 | } |
| 187 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 188 | static ssize_t alt_name_store(struct device *dev, |
| 189 | struct device_attribute *attr, const char *buf, size_t len) |
| 190 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 191 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 192 | ssize_t rc; |
| 193 | |
| 194 | device_lock(dev); |
| 195 | nvdimm_bus_lock(dev); |
| 196 | wait_nvdimm_bus_probe_idle(dev); |
| 197 | rc = __alt_name_store(dev, buf, len); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 198 | if (rc >= 0) |
| 199 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 200 | dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc); |
| 201 | nvdimm_bus_unlock(dev); |
| 202 | device_unlock(dev); |
| 203 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 204 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | static ssize_t alt_name_show(struct device *dev, |
| 208 | struct device_attribute *attr, char *buf) |
| 209 | { |
| 210 | char *ns_altname; |
| 211 | |
| 212 | if (is_namespace_pmem(dev)) { |
| 213 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 214 | |
| 215 | ns_altname = nspm->alt_name; |
| 216 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 217 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 218 | |
| 219 | ns_altname = nsblk->alt_name; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 220 | } else |
| 221 | return -ENXIO; |
| 222 | |
| 223 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); |
| 224 | } |
| 225 | static DEVICE_ATTR_RW(alt_name); |
| 226 | |
| 227 | static int scan_free(struct nd_region *nd_region, |
| 228 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 229 | resource_size_t n) |
| 230 | { |
| 231 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; |
| 232 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 233 | int rc = 0; |
| 234 | |
| 235 | while (n) { |
| 236 | struct resource *res, *last; |
| 237 | resource_size_t new_start; |
| 238 | |
| 239 | last = NULL; |
| 240 | for_each_dpa_resource(ndd, res) |
| 241 | if (strcmp(res->name, label_id->id) == 0) |
| 242 | last = res; |
| 243 | res = last; |
| 244 | if (!res) |
| 245 | return 0; |
| 246 | |
| 247 | if (n >= resource_size(res)) { |
| 248 | n -= resource_size(res); |
| 249 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); |
| 250 | nvdimm_free_dpa(ndd, res); |
| 251 | /* retry with last resource deleted */ |
| 252 | continue; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Keep BLK allocations relegated to high DPA as much as |
| 257 | * possible |
| 258 | */ |
| 259 | if (is_blk) |
| 260 | new_start = res->start + n; |
| 261 | else |
| 262 | new_start = res->start; |
| 263 | |
| 264 | rc = adjust_resource(res, new_start, resource_size(res) - n); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 265 | if (rc == 0) |
| 266 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 267 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
| 268 | break; |
| 269 | } |
| 270 | |
| 271 | return rc; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id |
| 276 | * @nd_region: the set of dimms to reclaim @n bytes from |
| 277 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 278 | * @n: number of bytes per-dimm to release |
| 279 | * |
| 280 | * Assumes resources are ordered. Starting from the end try to |
| 281 | * adjust_resource() the allocation to @n, but if @n is larger than the |
| 282 | * allocation delete it and find the 'new' last allocation in the label |
| 283 | * set. |
| 284 | */ |
| 285 | static int shrink_dpa_allocation(struct nd_region *nd_region, |
| 286 | struct nd_label_id *label_id, resource_size_t n) |
| 287 | { |
| 288 | int i; |
| 289 | |
| 290 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 291 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 292 | int rc; |
| 293 | |
| 294 | rc = scan_free(nd_region, nd_mapping, label_id, n); |
| 295 | if (rc) |
| 296 | return rc; |
| 297 | } |
| 298 | |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, |
| 303 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, |
| 304 | resource_size_t n) |
| 305 | { |
| 306 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; |
| 307 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 308 | resource_size_t first_dpa; |
| 309 | struct resource *res; |
| 310 | int rc = 0; |
| 311 | |
| 312 | /* allocate blk from highest dpa first */ |
| 313 | if (is_blk) |
| 314 | first_dpa = nd_mapping->start + nd_mapping->size - n; |
| 315 | else |
| 316 | first_dpa = nd_mapping->start; |
| 317 | |
| 318 | /* first resource allocation for this label-id or dimm */ |
| 319 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); |
| 320 | if (!res) |
| 321 | rc = -EBUSY; |
| 322 | |
| 323 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); |
| 324 | return rc ? n : 0; |
| 325 | } |
| 326 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 327 | static bool space_valid(bool is_pmem, bool is_reserve, |
| 328 | struct nd_label_id *label_id, struct resource *res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 329 | { |
| 330 | /* |
| 331 | * For BLK-space any space is valid, for PMEM-space, it must be |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 332 | * contiguous with an existing allocation unless we are |
| 333 | * reserving pmem. |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 334 | */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 335 | if (is_reserve || !is_pmem) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 336 | return true; |
| 337 | if (!res || strcmp(res->name, label_id->id) == 0) |
| 338 | return true; |
| 339 | return false; |
| 340 | } |
| 341 | |
| 342 | enum alloc_loc { |
| 343 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, |
| 344 | }; |
| 345 | |
| 346 | static resource_size_t scan_allocate(struct nd_region *nd_region, |
| 347 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, |
| 348 | resource_size_t n) |
| 349 | { |
| 350 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 351 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 352 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
| 353 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 354 | const resource_size_t to_allocate = n; |
| 355 | struct resource *res; |
| 356 | int first; |
| 357 | |
| 358 | retry: |
| 359 | first = 0; |
| 360 | for_each_dpa_resource(ndd, res) { |
| 361 | resource_size_t allocate, available = 0, free_start, free_end; |
| 362 | struct resource *next = res->sibling, *new_res = NULL; |
| 363 | enum alloc_loc loc = ALLOC_ERR; |
| 364 | const char *action; |
| 365 | int rc = 0; |
| 366 | |
| 367 | /* ignore resources outside this nd_mapping */ |
| 368 | if (res->start > mapping_end) |
| 369 | continue; |
| 370 | if (res->end < nd_mapping->start) |
| 371 | continue; |
| 372 | |
| 373 | /* space at the beginning of the mapping */ |
| 374 | if (!first++ && res->start > nd_mapping->start) { |
| 375 | free_start = nd_mapping->start; |
| 376 | available = res->start - free_start; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 377 | if (space_valid(is_pmem, is_reserve, label_id, NULL)) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 378 | loc = ALLOC_BEFORE; |
| 379 | } |
| 380 | |
| 381 | /* space between allocations */ |
| 382 | if (!loc && next) { |
| 383 | free_start = res->start + resource_size(res); |
| 384 | free_end = min(mapping_end, next->start - 1); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 385 | if (space_valid(is_pmem, is_reserve, label_id, res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 386 | && free_start < free_end) { |
| 387 | available = free_end + 1 - free_start; |
| 388 | loc = ALLOC_MID; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | /* space at the end of the mapping */ |
| 393 | if (!loc && !next) { |
| 394 | free_start = res->start + resource_size(res); |
| 395 | free_end = mapping_end; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 396 | if (space_valid(is_pmem, is_reserve, label_id, res) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 397 | && free_start < free_end) { |
| 398 | available = free_end + 1 - free_start; |
| 399 | loc = ALLOC_AFTER; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | if (!loc || !available) |
| 404 | continue; |
| 405 | allocate = min(available, n); |
| 406 | switch (loc) { |
| 407 | case ALLOC_BEFORE: |
| 408 | if (strcmp(res->name, label_id->id) == 0) { |
| 409 | /* adjust current resource up */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 410 | if (is_pmem && !is_reserve) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 411 | return n; |
| 412 | rc = adjust_resource(res, res->start - allocate, |
| 413 | resource_size(res) + allocate); |
| 414 | action = "cur grow up"; |
| 415 | } else |
| 416 | action = "allocate"; |
| 417 | break; |
| 418 | case ALLOC_MID: |
| 419 | if (strcmp(next->name, label_id->id) == 0) { |
| 420 | /* adjust next resource up */ |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 421 | if (is_pmem && !is_reserve) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 422 | return n; |
| 423 | rc = adjust_resource(next, next->start |
| 424 | - allocate, resource_size(next) |
| 425 | + allocate); |
| 426 | new_res = next; |
| 427 | action = "next grow up"; |
| 428 | } else if (strcmp(res->name, label_id->id) == 0) { |
| 429 | action = "grow down"; |
| 430 | } else |
| 431 | action = "allocate"; |
| 432 | break; |
| 433 | case ALLOC_AFTER: |
| 434 | if (strcmp(res->name, label_id->id) == 0) |
| 435 | action = "grow down"; |
| 436 | else |
| 437 | action = "allocate"; |
| 438 | break; |
| 439 | default: |
| 440 | return n; |
| 441 | } |
| 442 | |
| 443 | if (strcmp(action, "allocate") == 0) { |
| 444 | /* BLK allocate bottom up */ |
| 445 | if (!is_pmem) |
| 446 | free_start += available - allocate; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 447 | else if (!is_reserve && free_start != nd_mapping->start) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 448 | return n; |
| 449 | |
| 450 | new_res = nvdimm_allocate_dpa(ndd, label_id, |
| 451 | free_start, allocate); |
| 452 | if (!new_res) |
| 453 | rc = -EBUSY; |
| 454 | } else if (strcmp(action, "grow down") == 0) { |
| 455 | /* adjust current resource down */ |
| 456 | rc = adjust_resource(res, res->start, resource_size(res) |
| 457 | + allocate); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 458 | if (rc == 0) |
| 459 | res->flags |= DPA_RESOURCE_ADJUSTED; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | if (!new_res) |
| 463 | new_res = res; |
| 464 | |
| 465 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", |
| 466 | action, loc, rc); |
| 467 | |
| 468 | if (rc) |
| 469 | return n; |
| 470 | |
| 471 | n -= allocate; |
| 472 | if (n) { |
| 473 | /* |
| 474 | * Retry scan with newly inserted resources. |
| 475 | * For example, if we did an ALLOC_BEFORE |
| 476 | * insertion there may also have been space |
| 477 | * available for an ALLOC_AFTER insertion, so we |
| 478 | * need to check this same resource again |
| 479 | */ |
| 480 | goto retry; |
| 481 | } else |
| 482 | return 0; |
| 483 | } |
| 484 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 485 | /* |
| 486 | * If we allocated nothing in the BLK case it may be because we are in |
| 487 | * an initial "pmem-reserve pass". Only do an initial BLK allocation |
| 488 | * when none of the DPA space is reserved. |
| 489 | */ |
| 490 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 491 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
| 492 | return n; |
| 493 | } |
| 494 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 495 | static int merge_dpa(struct nd_region *nd_region, |
| 496 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) |
| 497 | { |
| 498 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 499 | struct resource *res; |
| 500 | |
| 501 | if (strncmp("pmem", label_id->id, 4) == 0) |
| 502 | return 0; |
| 503 | retry: |
| 504 | for_each_dpa_resource(ndd, res) { |
| 505 | int rc; |
| 506 | struct resource *next = res->sibling; |
| 507 | resource_size_t end = res->start + resource_size(res); |
| 508 | |
| 509 | if (!next || strcmp(res->name, label_id->id) != 0 |
| 510 | || strcmp(next->name, label_id->id) != 0 |
| 511 | || end != next->start) |
| 512 | continue; |
| 513 | end += resource_size(next); |
| 514 | nvdimm_free_dpa(ndd, next); |
| 515 | rc = adjust_resource(res, res->start, end - res->start); |
| 516 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); |
| 517 | if (rc) |
| 518 | return rc; |
| 519 | res->flags |= DPA_RESOURCE_ADJUSTED; |
| 520 | goto retry; |
| 521 | } |
| 522 | |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static int __reserve_free_pmem(struct device *dev, void *data) |
| 527 | { |
| 528 | struct nvdimm *nvdimm = data; |
| 529 | struct nd_region *nd_region; |
| 530 | struct nd_label_id label_id; |
| 531 | int i; |
| 532 | |
| 533 | if (!is_nd_pmem(dev)) |
| 534 | return 0; |
| 535 | |
| 536 | nd_region = to_nd_region(dev); |
| 537 | if (nd_region->ndr_mappings == 0) |
| 538 | return 0; |
| 539 | |
| 540 | memset(&label_id, 0, sizeof(label_id)); |
| 541 | strcat(label_id.id, "pmem-reserve"); |
| 542 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 543 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 544 | resource_size_t n, rem = 0; |
| 545 | |
| 546 | if (nd_mapping->nvdimm != nvdimm) |
| 547 | continue; |
| 548 | |
| 549 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); |
| 550 | if (n == 0) |
| 551 | return 0; |
| 552 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); |
| 553 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 554 | "pmem reserve underrun: %#llx of %#llx bytes\n", |
| 555 | (unsigned long long) n - rem, |
| 556 | (unsigned long long) n); |
| 557 | return rem ? -ENXIO : 0; |
| 558 | } |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
| 564 | struct nd_mapping *nd_mapping) |
| 565 | { |
| 566 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 567 | struct resource *res, *_res; |
| 568 | |
| 569 | for_each_dpa_resource_safe(ndd, res, _res) |
| 570 | if (strcmp(res->name, "pmem-reserve") == 0) |
| 571 | nvdimm_free_dpa(ndd, res); |
| 572 | } |
| 573 | |
| 574 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, |
| 575 | struct nd_mapping *nd_mapping) |
| 576 | { |
| 577 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 578 | int rc; |
| 579 | |
| 580 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, |
| 581 | __reserve_free_pmem); |
| 582 | if (rc) |
| 583 | release_free_pmem(nvdimm_bus, nd_mapping); |
| 584 | return rc; |
| 585 | } |
| 586 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 587 | /** |
| 588 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id |
| 589 | * @nd_region: the set of dimms to allocate @n more bytes from |
| 590 | * @label_id: unique identifier for the namespace consuming this dpa range |
| 591 | * @n: number of bytes per-dimm to add to the existing allocation |
| 592 | * |
| 593 | * Assumes resources are ordered. For BLK regions, first consume |
| 594 | * BLK-only available DPA free space, then consume PMEM-aliased DPA |
| 595 | * space starting at the highest DPA. For PMEM regions start |
| 596 | * allocations from the start of an interleave set and end at the first |
| 597 | * BLK allocation or the end of the interleave set, whichever comes |
| 598 | * first. |
| 599 | */ |
| 600 | static int grow_dpa_allocation(struct nd_region *nd_region, |
| 601 | struct nd_label_id *label_id, resource_size_t n) |
| 602 | { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 603 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
| 604 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 605 | int i; |
| 606 | |
| 607 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 608 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 609 | resource_size_t rem = n; |
| 610 | int rc, j; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 611 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 612 | /* |
| 613 | * In the BLK case try once with all unallocated PMEM |
| 614 | * reserved, and once without |
| 615 | */ |
| 616 | for (j = is_pmem; j < 2; j++) { |
| 617 | bool blk_only = j == 0; |
| 618 | |
| 619 | if (blk_only) { |
| 620 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); |
| 621 | if (rc) |
| 622 | return rc; |
| 623 | } |
| 624 | rem = scan_allocate(nd_region, nd_mapping, |
| 625 | label_id, rem); |
| 626 | if (blk_only) |
| 627 | release_free_pmem(nvdimm_bus, nd_mapping); |
| 628 | |
| 629 | /* try again and allow encroachments into PMEM */ |
| 630 | if (rem == 0) |
| 631 | break; |
| 632 | } |
| 633 | |
| 634 | dev_WARN_ONCE(&nd_region->dev, rem, |
| 635 | "allocation underrun: %#llx of %#llx bytes\n", |
| 636 | (unsigned long long) n - rem, |
| 637 | (unsigned long long) n); |
| 638 | if (rem) |
| 639 | return -ENXIO; |
| 640 | |
| 641 | rc = merge_dpa(nd_region, nd_mapping, label_id); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 642 | if (rc) |
| 643 | return rc; |
| 644 | } |
| 645 | |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | static void nd_namespace_pmem_set_size(struct nd_region *nd_region, |
| 650 | struct nd_namespace_pmem *nspm, resource_size_t size) |
| 651 | { |
| 652 | struct resource *res = &nspm->nsio.res; |
| 653 | |
| 654 | res->start = nd_region->ndr_start; |
| 655 | res->end = nd_region->ndr_start + size - 1; |
| 656 | } |
| 657 | |
| 658 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
| 659 | { |
| 660 | resource_size_t allocated = 0, available = 0; |
| 661 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 662 | struct nd_mapping *nd_mapping; |
| 663 | struct nvdimm_drvdata *ndd; |
| 664 | struct nd_label_id label_id; |
| 665 | u32 flags = 0, remainder; |
| 666 | u8 *uuid = NULL; |
| 667 | int rc, i; |
| 668 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 669 | if (dev->driver || to_ndns(dev)->claim) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 670 | return -EBUSY; |
| 671 | |
| 672 | if (is_namespace_pmem(dev)) { |
| 673 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 674 | |
| 675 | uuid = nspm->uuid; |
| 676 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 677 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 678 | |
| 679 | uuid = nsblk->uuid; |
| 680 | flags = NSLABEL_FLAG_LOCAL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | /* |
| 684 | * We need a uuid for the allocation-label and dimm(s) on which |
| 685 | * to store the label. |
| 686 | */ |
| 687 | if (!uuid || nd_region->ndr_mappings == 0) |
| 688 | return -ENXIO; |
| 689 | |
| 690 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); |
| 691 | if (remainder) { |
| 692 | dev_dbg(dev, "%llu is not %dK aligned\n", val, |
| 693 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); |
| 694 | return -EINVAL; |
| 695 | } |
| 696 | |
| 697 | nd_label_gen_id(&label_id, uuid, flags); |
| 698 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 699 | nd_mapping = &nd_region->mapping[i]; |
| 700 | ndd = to_ndd(nd_mapping); |
| 701 | |
| 702 | /* |
| 703 | * All dimms in an interleave set, or the base dimm for a blk |
| 704 | * region, need to be enabled for the size to be changed. |
| 705 | */ |
| 706 | if (!ndd) |
| 707 | return -ENXIO; |
| 708 | |
| 709 | allocated += nvdimm_allocated_dpa(ndd, &label_id); |
| 710 | } |
| 711 | available = nd_region_available_dpa(nd_region); |
| 712 | |
| 713 | if (val > available + allocated) |
| 714 | return -ENOSPC; |
| 715 | |
| 716 | if (val == allocated) |
| 717 | return 0; |
| 718 | |
| 719 | val = div_u64(val, nd_region->ndr_mappings); |
| 720 | allocated = div_u64(allocated, nd_region->ndr_mappings); |
| 721 | if (val < allocated) |
| 722 | rc = shrink_dpa_allocation(nd_region, &label_id, |
| 723 | allocated - val); |
| 724 | else |
| 725 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); |
| 726 | |
| 727 | if (rc) |
| 728 | return rc; |
| 729 | |
| 730 | if (is_namespace_pmem(dev)) { |
| 731 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 732 | |
| 733 | nd_namespace_pmem_set_size(nd_region, nspm, |
| 734 | val * nd_region->ndr_mappings); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 735 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 736 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 737 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 738 | /* |
| 739 | * Try to delete the namespace if we deleted all of its |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 740 | * allocation, this is not the seed device for the |
| 741 | * region, and it is not actively claimed by a btt |
| 742 | * instance. |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 743 | */ |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 744 | if (val == 0 && nd_region->ns_seed != dev |
| 745 | && !nsblk->common.claim) |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 746 | nd_device_unregister(dev, ND_ASYNC); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | return rc; |
| 750 | } |
| 751 | |
| 752 | static ssize_t size_store(struct device *dev, |
| 753 | struct device_attribute *attr, const char *buf, size_t len) |
| 754 | { |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 755 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 756 | unsigned long long val; |
| 757 | u8 **uuid = NULL; |
| 758 | int rc; |
| 759 | |
| 760 | rc = kstrtoull(buf, 0, &val); |
| 761 | if (rc) |
| 762 | return rc; |
| 763 | |
| 764 | device_lock(dev); |
| 765 | nvdimm_bus_lock(dev); |
| 766 | wait_nvdimm_bus_probe_idle(dev); |
| 767 | rc = __size_store(dev, val); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 768 | if (rc >= 0) |
| 769 | rc = nd_namespace_label_update(nd_region, dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 770 | |
| 771 | if (is_namespace_pmem(dev)) { |
| 772 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 773 | |
| 774 | uuid = &nspm->uuid; |
| 775 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 776 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 777 | |
| 778 | uuid = &nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 779 | } |
| 780 | |
| 781 | if (rc == 0 && val == 0 && uuid) { |
| 782 | /* setting size zero == 'delete namespace' */ |
| 783 | kfree(*uuid); |
| 784 | *uuid = NULL; |
| 785 | } |
| 786 | |
| 787 | dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0 |
| 788 | ? "fail" : "success", rc); |
| 789 | |
| 790 | nvdimm_bus_unlock(dev); |
| 791 | device_unlock(dev); |
| 792 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 793 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 794 | } |
| 795 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 796 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 797 | { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 798 | struct device *dev = &ndns->dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 799 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 800 | if (is_namespace_pmem(dev)) { |
| 801 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 802 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 803 | return resource_size(&nspm->nsio.res); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 804 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 805 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 806 | } else if (is_namespace_io(dev)) { |
| 807 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 808 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 809 | return resource_size(&nsio->res); |
| 810 | } else |
| 811 | WARN_ONCE(1, "unknown namespace type\n"); |
| 812 | return 0; |
| 813 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 814 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 815 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
| 816 | { |
| 817 | resource_size_t size; |
| 818 | |
| 819 | nvdimm_bus_lock(&ndns->dev); |
| 820 | size = __nvdimm_namespace_capacity(ndns); |
| 821 | nvdimm_bus_unlock(&ndns->dev); |
| 822 | |
| 823 | return size; |
| 824 | } |
| 825 | EXPORT_SYMBOL(nvdimm_namespace_capacity); |
| 826 | |
| 827 | static ssize_t size_show(struct device *dev, |
| 828 | struct device_attribute *attr, char *buf) |
| 829 | { |
| 830 | return sprintf(buf, "%llu\n", (unsigned long long) |
| 831 | nvdimm_namespace_capacity(to_ndns(dev))); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 832 | } |
| 833 | static DEVICE_ATTR(size, S_IRUGO, size_show, size_store); |
| 834 | |
| 835 | static ssize_t uuid_show(struct device *dev, |
| 836 | struct device_attribute *attr, char *buf) |
| 837 | { |
| 838 | u8 *uuid; |
| 839 | |
| 840 | if (is_namespace_pmem(dev)) { |
| 841 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 842 | |
| 843 | uuid = nspm->uuid; |
| 844 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 845 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 846 | |
| 847 | uuid = nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 848 | } else |
| 849 | return -ENXIO; |
| 850 | |
| 851 | if (uuid) |
| 852 | return sprintf(buf, "%pUb\n", uuid); |
| 853 | return sprintf(buf, "\n"); |
| 854 | } |
| 855 | |
| 856 | /** |
| 857 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" |
| 858 | * @nd_region: parent region so we can updates all dimms in the set |
| 859 | * @dev: namespace type for generating label_id |
| 860 | * @new_uuid: incoming uuid |
| 861 | * @old_uuid: reference to the uuid storage location in the namespace object |
| 862 | */ |
| 863 | static int namespace_update_uuid(struct nd_region *nd_region, |
| 864 | struct device *dev, u8 *new_uuid, u8 **old_uuid) |
| 865 | { |
| 866 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; |
| 867 | struct nd_label_id old_label_id; |
| 868 | struct nd_label_id new_label_id; |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 869 | int i; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 870 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 871 | if (!nd_is_uuid_unique(dev, new_uuid)) |
| 872 | return -EINVAL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 873 | |
| 874 | if (*old_uuid == NULL) |
| 875 | goto out; |
| 876 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 877 | /* |
| 878 | * If we've already written a label with this uuid, then it's |
| 879 | * too late to rename because we can't reliably update the uuid |
| 880 | * without losing the old namespace. Userspace must delete this |
| 881 | * namespace to abandon the old uuid. |
| 882 | */ |
| 883 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 884 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 885 | |
| 886 | /* |
| 887 | * This check by itself is sufficient because old_uuid |
| 888 | * would be NULL above if this uuid did not exist in the |
| 889 | * currently written set. |
| 890 | * |
| 891 | * FIXME: can we delete uuid with zero dpa allocated? |
| 892 | */ |
| 893 | if (nd_mapping->labels) |
| 894 | return -EBUSY; |
| 895 | } |
| 896 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 897 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
| 898 | nd_label_gen_id(&new_label_id, new_uuid, flags); |
| 899 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 900 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 901 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 902 | struct resource *res; |
| 903 | |
| 904 | for_each_dpa_resource(ndd, res) |
| 905 | if (strcmp(res->name, old_label_id.id) == 0) |
| 906 | sprintf((void *) res->name, "%s", |
| 907 | new_label_id.id); |
| 908 | } |
| 909 | kfree(*old_uuid); |
| 910 | out: |
| 911 | *old_uuid = new_uuid; |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | static ssize_t uuid_store(struct device *dev, |
| 916 | struct device_attribute *attr, const char *buf, size_t len) |
| 917 | { |
| 918 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 919 | u8 *uuid = NULL; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 920 | ssize_t rc = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 921 | u8 **ns_uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 922 | |
| 923 | if (is_namespace_pmem(dev)) { |
| 924 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 925 | |
| 926 | ns_uuid = &nspm->uuid; |
| 927 | } else if (is_namespace_blk(dev)) { |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 928 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 929 | |
| 930 | ns_uuid = &nsblk->uuid; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 931 | } else |
| 932 | return -ENXIO; |
| 933 | |
| 934 | device_lock(dev); |
| 935 | nvdimm_bus_lock(dev); |
| 936 | wait_nvdimm_bus_probe_idle(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 937 | if (to_ndns(dev)->claim) |
| 938 | rc = -EBUSY; |
| 939 | if (rc >= 0) |
| 940 | rc = nd_uuid_store(dev, &uuid, buf, len); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 941 | if (rc >= 0) |
| 942 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 943 | if (rc >= 0) |
| 944 | rc = nd_namespace_label_update(nd_region, dev); |
| 945 | else |
| 946 | kfree(uuid); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 947 | dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, |
| 948 | rc, buf, buf[len - 1] == '\n' ? "" : "\n"); |
| 949 | nvdimm_bus_unlock(dev); |
| 950 | device_unlock(dev); |
| 951 | |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 952 | return rc < 0 ? rc : len; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 953 | } |
| 954 | static DEVICE_ATTR_RW(uuid); |
| 955 | |
| 956 | static ssize_t resource_show(struct device *dev, |
| 957 | struct device_attribute *attr, char *buf) |
| 958 | { |
| 959 | struct resource *res; |
| 960 | |
| 961 | if (is_namespace_pmem(dev)) { |
| 962 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 963 | |
| 964 | res = &nspm->nsio.res; |
| 965 | } else if (is_namespace_io(dev)) { |
| 966 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 967 | |
| 968 | res = &nsio->res; |
| 969 | } else |
| 970 | return -ENXIO; |
| 971 | |
| 972 | /* no address to convey if the namespace has no allocation */ |
| 973 | if (resource_size(res) == 0) |
| 974 | return -ENXIO; |
| 975 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); |
| 976 | } |
| 977 | static DEVICE_ATTR_RO(resource); |
| 978 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 979 | static const unsigned long ns_lbasize_supported[] = { 512, 0 }; |
| 980 | |
| 981 | static ssize_t sector_size_show(struct device *dev, |
| 982 | struct device_attribute *attr, char *buf) |
| 983 | { |
| 984 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 985 | |
| 986 | if (!is_namespace_blk(dev)) |
| 987 | return -ENXIO; |
| 988 | |
| 989 | return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf); |
| 990 | } |
| 991 | |
| 992 | static ssize_t sector_size_store(struct device *dev, |
| 993 | struct device_attribute *attr, const char *buf, size_t len) |
| 994 | { |
| 995 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 996 | struct nd_region *nd_region = to_nd_region(dev->parent); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 997 | ssize_t rc = 0; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 998 | |
| 999 | if (!is_namespace_blk(dev)) |
| 1000 | return -ENXIO; |
| 1001 | |
| 1002 | device_lock(dev); |
| 1003 | nvdimm_bus_lock(dev); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1004 | if (to_ndns(dev)->claim) |
| 1005 | rc = -EBUSY; |
| 1006 | if (rc >= 0) |
| 1007 | rc = nd_sector_size_store(dev, buf, &nsblk->lbasize, |
| 1008 | ns_lbasize_supported); |
Dan Williams | f524bf2 | 2015-05-30 12:36:02 -0400 | [diff] [blame] | 1009 | if (rc >= 0) |
| 1010 | rc = nd_namespace_label_update(nd_region, dev); |
| 1011 | dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__, |
| 1012 | rc, rc < 0 ? "tried" : "wrote", buf, |
| 1013 | buf[len - 1] == '\n' ? "" : "\n"); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1014 | nvdimm_bus_unlock(dev); |
| 1015 | device_unlock(dev); |
| 1016 | |
| 1017 | return rc ? rc : len; |
| 1018 | } |
| 1019 | static DEVICE_ATTR_RW(sector_size); |
| 1020 | |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1021 | static ssize_t dpa_extents_show(struct device *dev, |
| 1022 | struct device_attribute *attr, char *buf) |
| 1023 | { |
| 1024 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 1025 | struct nd_label_id label_id; |
| 1026 | int count = 0, i; |
| 1027 | u8 *uuid = NULL; |
| 1028 | u32 flags = 0; |
| 1029 | |
| 1030 | nvdimm_bus_lock(dev); |
| 1031 | if (is_namespace_pmem(dev)) { |
| 1032 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); |
| 1033 | |
| 1034 | uuid = nspm->uuid; |
| 1035 | flags = 0; |
| 1036 | } else if (is_namespace_blk(dev)) { |
| 1037 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
| 1038 | |
| 1039 | uuid = nsblk->uuid; |
| 1040 | flags = NSLABEL_FLAG_LOCAL; |
| 1041 | } |
| 1042 | |
| 1043 | if (!uuid) |
| 1044 | goto out; |
| 1045 | |
| 1046 | nd_label_gen_id(&label_id, uuid, flags); |
| 1047 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1048 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1049 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1050 | struct resource *res; |
| 1051 | |
| 1052 | for_each_dpa_resource(ndd, res) |
| 1053 | if (strcmp(res->name, label_id.id) == 0) |
| 1054 | count++; |
| 1055 | } |
| 1056 | out: |
| 1057 | nvdimm_bus_unlock(dev); |
| 1058 | |
| 1059 | return sprintf(buf, "%d\n", count); |
| 1060 | } |
| 1061 | static DEVICE_ATTR_RO(dpa_extents); |
| 1062 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1063 | static ssize_t holder_show(struct device *dev, |
| 1064 | struct device_attribute *attr, char *buf) |
| 1065 | { |
| 1066 | struct nd_namespace_common *ndns = to_ndns(dev); |
| 1067 | ssize_t rc; |
| 1068 | |
| 1069 | device_lock(dev); |
| 1070 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
| 1071 | device_unlock(dev); |
| 1072 | |
| 1073 | return rc; |
| 1074 | } |
| 1075 | static DEVICE_ATTR_RO(holder); |
| 1076 | |
| 1077 | static ssize_t force_raw_store(struct device *dev, |
| 1078 | struct device_attribute *attr, const char *buf, size_t len) |
| 1079 | { |
| 1080 | bool force_raw; |
| 1081 | int rc = strtobool(buf, &force_raw); |
| 1082 | |
| 1083 | if (rc) |
| 1084 | return rc; |
| 1085 | |
| 1086 | to_ndns(dev)->force_raw = force_raw; |
| 1087 | return len; |
| 1088 | } |
| 1089 | |
| 1090 | static ssize_t force_raw_show(struct device *dev, |
| 1091 | struct device_attribute *attr, char *buf) |
| 1092 | { |
| 1093 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); |
| 1094 | } |
| 1095 | static DEVICE_ATTR_RW(force_raw); |
| 1096 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1097 | static struct attribute *nd_namespace_attributes[] = { |
| 1098 | &dev_attr_nstype.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1099 | &dev_attr_size.attr, |
| 1100 | &dev_attr_uuid.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1101 | &dev_attr_holder.attr, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1102 | &dev_attr_resource.attr, |
| 1103 | &dev_attr_alt_name.attr, |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1104 | &dev_attr_force_raw.attr, |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1105 | &dev_attr_sector_size.attr, |
Dan Williams | 0ba1c63 | 2015-05-30 12:35:36 -0400 | [diff] [blame] | 1106 | &dev_attr_dpa_extents.attr, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1107 | NULL, |
| 1108 | }; |
| 1109 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1110 | static umode_t namespace_visible(struct kobject *kobj, |
| 1111 | struct attribute *a, int n) |
| 1112 | { |
| 1113 | struct device *dev = container_of(kobj, struct device, kobj); |
| 1114 | |
| 1115 | if (a == &dev_attr_resource.attr) { |
| 1116 | if (is_namespace_blk(dev)) |
| 1117 | return 0; |
| 1118 | return a->mode; |
| 1119 | } |
| 1120 | |
| 1121 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { |
| 1122 | if (a == &dev_attr_size.attr) |
| 1123 | return S_IWUSR | S_IRUGO; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1124 | |
| 1125 | if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr) |
| 1126 | return 0; |
| 1127 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1128 | return a->mode; |
| 1129 | } |
| 1130 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1131 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
| 1132 | || a == &dev_attr_holder.attr |
| 1133 | || a == &dev_attr_force_raw.attr) |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1134 | return a->mode; |
| 1135 | |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1139 | static struct attribute_group nd_namespace_attribute_group = { |
| 1140 | .attrs = nd_namespace_attributes, |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1141 | .is_visible = namespace_visible, |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1142 | }; |
| 1143 | |
| 1144 | static const struct attribute_group *nd_namespace_attribute_groups[] = { |
| 1145 | &nd_device_attribute_group, |
| 1146 | &nd_namespace_attribute_group, |
| 1147 | NULL, |
| 1148 | }; |
| 1149 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1150 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
| 1151 | { |
| 1152 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; |
| 1153 | struct nd_namespace_common *ndns; |
| 1154 | resource_size_t size; |
| 1155 | |
| 1156 | if (nd_btt) { |
| 1157 | ndns = nd_btt->ndns; |
| 1158 | if (!ndns) |
| 1159 | return ERR_PTR(-ENODEV); |
| 1160 | |
| 1161 | /* |
| 1162 | * Flush any in-progess probes / removals in the driver |
| 1163 | * for the raw personality of this namespace. |
| 1164 | */ |
| 1165 | device_lock(&ndns->dev); |
| 1166 | device_unlock(&ndns->dev); |
| 1167 | if (ndns->dev.driver) { |
| 1168 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", |
| 1169 | dev_name(&nd_btt->dev)); |
| 1170 | return ERR_PTR(-EBUSY); |
| 1171 | } |
| 1172 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != &nd_btt->dev, |
| 1173 | "host (%s) vs claim (%s) mismatch\n", |
| 1174 | dev_name(&nd_btt->dev), |
| 1175 | dev_name(ndns->claim))) |
| 1176 | return ERR_PTR(-ENXIO); |
| 1177 | } else { |
| 1178 | ndns = to_ndns(dev); |
| 1179 | if (ndns->claim) { |
| 1180 | dev_dbg(dev, "claimed by %s, failing probe\n", |
| 1181 | dev_name(ndns->claim)); |
| 1182 | |
| 1183 | return ERR_PTR(-ENXIO); |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | size = nvdimm_namespace_capacity(ndns); |
| 1188 | if (size < ND_MIN_NAMESPACE_SIZE) { |
| 1189 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", |
| 1190 | &size, ND_MIN_NAMESPACE_SIZE); |
| 1191 | return ERR_PTR(-ENODEV); |
| 1192 | } |
| 1193 | |
| 1194 | if (is_namespace_pmem(&ndns->dev)) { |
| 1195 | struct nd_namespace_pmem *nspm; |
| 1196 | |
| 1197 | nspm = to_nd_namespace_pmem(&ndns->dev); |
| 1198 | if (!nspm->uuid) { |
| 1199 | dev_dbg(&ndns->dev, "%s: uuid not set\n", __func__); |
| 1200 | return ERR_PTR(-ENODEV); |
| 1201 | } |
| 1202 | } else if (is_namespace_blk(&ndns->dev)) { |
| 1203 | return ERR_PTR(-ENODEV); /* TODO */ |
| 1204 | } |
| 1205 | |
| 1206 | return ndns; |
| 1207 | } |
| 1208 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); |
| 1209 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1210 | static struct device **create_namespace_io(struct nd_region *nd_region) |
| 1211 | { |
| 1212 | struct nd_namespace_io *nsio; |
| 1213 | struct device *dev, **devs; |
| 1214 | struct resource *res; |
| 1215 | |
| 1216 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); |
| 1217 | if (!nsio) |
| 1218 | return NULL; |
| 1219 | |
| 1220 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 1221 | if (!devs) { |
| 1222 | kfree(nsio); |
| 1223 | return NULL; |
| 1224 | } |
| 1225 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1226 | dev = &nsio->common.dev; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1227 | dev->type = &namespace_io_device_type; |
| 1228 | dev->parent = &nd_region->dev; |
| 1229 | res = &nsio->res; |
| 1230 | res->name = dev_name(&nd_region->dev); |
| 1231 | res->flags = IORESOURCE_MEM; |
| 1232 | res->start = nd_region->ndr_start; |
| 1233 | res->end = res->start + nd_region->ndr_size - 1; |
| 1234 | |
| 1235 | devs[0] = dev; |
| 1236 | return devs; |
| 1237 | } |
| 1238 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1239 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
| 1240 | u64 cookie, u16 pos) |
| 1241 | { |
| 1242 | struct nd_namespace_label *found = NULL; |
| 1243 | int i; |
| 1244 | |
| 1245 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1246 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1247 | struct nd_namespace_label *nd_label; |
| 1248 | bool found_uuid = false; |
| 1249 | int l; |
| 1250 | |
| 1251 | for_each_label(l, nd_label, nd_mapping->labels) { |
| 1252 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); |
| 1253 | u16 position = __le16_to_cpu(nd_label->position); |
| 1254 | u16 nlabel = __le16_to_cpu(nd_label->nlabel); |
| 1255 | |
| 1256 | if (isetcookie != cookie) |
| 1257 | continue; |
| 1258 | |
| 1259 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) |
| 1260 | continue; |
| 1261 | |
| 1262 | if (found_uuid) { |
| 1263 | dev_dbg(to_ndd(nd_mapping)->dev, |
| 1264 | "%s duplicate entry for uuid\n", |
| 1265 | __func__); |
| 1266 | return false; |
| 1267 | } |
| 1268 | found_uuid = true; |
| 1269 | if (nlabel != nd_region->ndr_mappings) |
| 1270 | continue; |
| 1271 | if (position != pos) |
| 1272 | continue; |
| 1273 | found = nd_label; |
| 1274 | break; |
| 1275 | } |
| 1276 | if (found) |
| 1277 | break; |
| 1278 | } |
| 1279 | return found != NULL; |
| 1280 | } |
| 1281 | |
| 1282 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) |
| 1283 | { |
| 1284 | struct nd_namespace_label *select = NULL; |
| 1285 | int i; |
| 1286 | |
| 1287 | if (!pmem_id) |
| 1288 | return -ENODEV; |
| 1289 | |
| 1290 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1291 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1292 | struct nd_namespace_label *nd_label; |
| 1293 | u64 hw_start, hw_end, pmem_start, pmem_end; |
| 1294 | int l; |
| 1295 | |
| 1296 | for_each_label(l, nd_label, nd_mapping->labels) |
| 1297 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
| 1298 | break; |
| 1299 | |
| 1300 | if (!nd_label) { |
| 1301 | WARN_ON(1); |
| 1302 | return -EINVAL; |
| 1303 | } |
| 1304 | |
| 1305 | select = nd_label; |
| 1306 | /* |
| 1307 | * Check that this label is compliant with the dpa |
| 1308 | * range published in NFIT |
| 1309 | */ |
| 1310 | hw_start = nd_mapping->start; |
| 1311 | hw_end = hw_start + nd_mapping->size; |
| 1312 | pmem_start = __le64_to_cpu(select->dpa); |
| 1313 | pmem_end = pmem_start + __le64_to_cpu(select->rawsize); |
| 1314 | if (pmem_start == hw_start && pmem_end <= hw_end) |
| 1315 | /* pass */; |
| 1316 | else |
| 1317 | return -EINVAL; |
| 1318 | |
| 1319 | nd_mapping->labels[0] = select; |
| 1320 | nd_mapping->labels[1] = NULL; |
| 1321 | } |
| 1322 | return 0; |
| 1323 | } |
| 1324 | |
| 1325 | /** |
| 1326 | * find_pmem_label_set - validate interleave set labelling, retrieve label0 |
| 1327 | * @nd_region: region with mappings to validate |
| 1328 | */ |
| 1329 | static int find_pmem_label_set(struct nd_region *nd_region, |
| 1330 | struct nd_namespace_pmem *nspm) |
| 1331 | { |
| 1332 | u64 cookie = nd_region_interleave_set_cookie(nd_region); |
| 1333 | struct nd_namespace_label *nd_label; |
| 1334 | u8 select_id[NSLABEL_UUID_LEN]; |
| 1335 | resource_size_t size = 0; |
| 1336 | u8 *pmem_id = NULL; |
| 1337 | int rc = -ENODEV, l; |
| 1338 | u16 i; |
| 1339 | |
| 1340 | if (cookie == 0) |
| 1341 | return -ENXIO; |
| 1342 | |
| 1343 | /* |
| 1344 | * Find a complete set of labels by uuid. By definition we can start |
| 1345 | * with any mapping as the reference label |
| 1346 | */ |
| 1347 | for_each_label(l, nd_label, nd_region->mapping[0].labels) { |
| 1348 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); |
| 1349 | |
| 1350 | if (isetcookie != cookie) |
| 1351 | continue; |
| 1352 | |
| 1353 | for (i = 0; nd_region->ndr_mappings; i++) |
| 1354 | if (!has_uuid_at_pos(nd_region, nd_label->uuid, |
| 1355 | cookie, i)) |
| 1356 | break; |
| 1357 | if (i < nd_region->ndr_mappings) { |
| 1358 | /* |
| 1359 | * Give up if we don't find an instance of a |
| 1360 | * uuid at each position (from 0 to |
| 1361 | * nd_region->ndr_mappings - 1), or if we find a |
| 1362 | * dimm with two instances of the same uuid. |
| 1363 | */ |
| 1364 | rc = -EINVAL; |
| 1365 | goto err; |
| 1366 | } else if (pmem_id) { |
| 1367 | /* |
| 1368 | * If there is more than one valid uuid set, we |
| 1369 | * need userspace to clean this up. |
| 1370 | */ |
| 1371 | rc = -EBUSY; |
| 1372 | goto err; |
| 1373 | } |
| 1374 | memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN); |
| 1375 | pmem_id = select_id; |
| 1376 | } |
| 1377 | |
| 1378 | /* |
| 1379 | * Fix up each mapping's 'labels' to have the validated pmem label for |
| 1380 | * that position at labels[0], and NULL at labels[1]. In the process, |
| 1381 | * check that the namespace aligns with interleave-set. We know |
| 1382 | * that it does not overlap with any blk namespaces by virtue of |
| 1383 | * the dimm being enabled (i.e. nd_label_reserve_dpa() |
| 1384 | * succeeded). |
| 1385 | */ |
| 1386 | rc = select_pmem_id(nd_region, pmem_id); |
| 1387 | if (rc) |
| 1388 | goto err; |
| 1389 | |
| 1390 | /* Calculate total size and populate namespace properties from label0 */ |
| 1391 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1392 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1393 | struct nd_namespace_label *label0 = nd_mapping->labels[0]; |
| 1394 | |
| 1395 | size += __le64_to_cpu(label0->rawsize); |
| 1396 | if (__le16_to_cpu(label0->position) != 0) |
| 1397 | continue; |
| 1398 | WARN_ON(nspm->alt_name || nspm->uuid); |
| 1399 | nspm->alt_name = kmemdup((void __force *) label0->name, |
| 1400 | NSLABEL_NAME_LEN, GFP_KERNEL); |
| 1401 | nspm->uuid = kmemdup((void __force *) label0->uuid, |
| 1402 | NSLABEL_UUID_LEN, GFP_KERNEL); |
| 1403 | } |
| 1404 | |
| 1405 | if (!nspm->alt_name || !nspm->uuid) { |
| 1406 | rc = -ENOMEM; |
| 1407 | goto err; |
| 1408 | } |
| 1409 | |
| 1410 | nd_namespace_pmem_set_size(nd_region, nspm, size); |
| 1411 | |
| 1412 | return 0; |
| 1413 | err: |
| 1414 | switch (rc) { |
| 1415 | case -EINVAL: |
| 1416 | dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__); |
| 1417 | break; |
| 1418 | case -ENODEV: |
| 1419 | dev_dbg(&nd_region->dev, "%s: label not found\n", __func__); |
| 1420 | break; |
| 1421 | default: |
| 1422 | dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n", |
| 1423 | __func__, rc); |
| 1424 | break; |
| 1425 | } |
| 1426 | return rc; |
| 1427 | } |
| 1428 | |
| 1429 | static struct device **create_namespace_pmem(struct nd_region *nd_region) |
| 1430 | { |
| 1431 | struct nd_namespace_pmem *nspm; |
| 1432 | struct device *dev, **devs; |
| 1433 | struct resource *res; |
| 1434 | int rc; |
| 1435 | |
| 1436 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
| 1437 | if (!nspm) |
| 1438 | return NULL; |
| 1439 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1440 | dev = &nspm->nsio.common.dev; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1441 | dev->type = &namespace_pmem_device_type; |
| 1442 | dev->parent = &nd_region->dev; |
| 1443 | res = &nspm->nsio.res; |
| 1444 | res->name = dev_name(&nd_region->dev); |
| 1445 | res->flags = IORESOURCE_MEM; |
| 1446 | rc = find_pmem_label_set(nd_region, nspm); |
| 1447 | if (rc == -ENODEV) { |
| 1448 | int i; |
| 1449 | |
| 1450 | /* Pass, try to permit namespace creation... */ |
| 1451 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1452 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1453 | |
| 1454 | kfree(nd_mapping->labels); |
| 1455 | nd_mapping->labels = NULL; |
| 1456 | } |
| 1457 | |
| 1458 | /* Publish a zero-sized namespace for userspace to configure. */ |
| 1459 | nd_namespace_pmem_set_size(nd_region, nspm, 0); |
| 1460 | |
| 1461 | rc = 0; |
| 1462 | } else if (rc) |
| 1463 | goto err; |
| 1464 | |
| 1465 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 1466 | if (!devs) |
| 1467 | goto err; |
| 1468 | |
| 1469 | devs[0] = dev; |
| 1470 | return devs; |
| 1471 | |
| 1472 | err: |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1473 | namespace_pmem_release(&nspm->nsio.common.dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1474 | return NULL; |
| 1475 | } |
| 1476 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1477 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
| 1478 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, |
| 1479 | resource_size_t start) |
| 1480 | { |
| 1481 | struct nd_label_id label_id; |
| 1482 | struct resource *res; |
| 1483 | |
| 1484 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); |
| 1485 | res = krealloc(nsblk->res, |
| 1486 | sizeof(void *) * (nsblk->num_resources + 1), |
| 1487 | GFP_KERNEL); |
| 1488 | if (!res) |
| 1489 | return NULL; |
| 1490 | nsblk->res = (struct resource **) res; |
| 1491 | for_each_dpa_resource(ndd, res) |
| 1492 | if (strcmp(res->name, label_id.id) == 0 |
| 1493 | && res->start == start) { |
| 1494 | nsblk->res[nsblk->num_resources++] = res; |
| 1495 | return res; |
| 1496 | } |
| 1497 | return NULL; |
| 1498 | } |
| 1499 | |
| 1500 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) |
| 1501 | { |
| 1502 | struct nd_namespace_blk *nsblk; |
| 1503 | struct device *dev; |
| 1504 | |
| 1505 | if (!is_nd_blk(&nd_region->dev)) |
| 1506 | return NULL; |
| 1507 | |
| 1508 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1509 | if (!nsblk) |
| 1510 | return NULL; |
| 1511 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1512 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1513 | dev->type = &namespace_blk_device_type; |
| 1514 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); |
| 1515 | if (nsblk->id < 0) { |
| 1516 | kfree(nsblk); |
| 1517 | return NULL; |
| 1518 | } |
| 1519 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); |
| 1520 | dev->parent = &nd_region->dev; |
| 1521 | dev->groups = nd_namespace_attribute_groups; |
| 1522 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1523 | return &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | void nd_region_create_blk_seed(struct nd_region *nd_region) |
| 1527 | { |
| 1528 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1529 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); |
| 1530 | /* |
| 1531 | * Seed creation failures are not fatal, provisioning is simply |
| 1532 | * disabled until memory becomes available |
| 1533 | */ |
| 1534 | if (!nd_region->ns_seed) |
| 1535 | dev_err(&nd_region->dev, "failed to create blk namespace\n"); |
| 1536 | else |
| 1537 | nd_device_register(nd_region->ns_seed); |
| 1538 | } |
| 1539 | |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1540 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
| 1541 | { |
| 1542 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); |
| 1543 | nd_region->btt_seed = nd_btt_create(nd_region); |
| 1544 | /* |
| 1545 | * Seed creation failures are not fatal, provisioning is simply |
| 1546 | * disabled until memory becomes available |
| 1547 | */ |
| 1548 | if (!nd_region->btt_seed) |
| 1549 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); |
| 1550 | } |
| 1551 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1552 | static struct device **create_namespace_blk(struct nd_region *nd_region) |
| 1553 | { |
| 1554 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
| 1555 | struct nd_namespace_label *nd_label; |
| 1556 | struct device *dev, **devs = NULL; |
| 1557 | struct nd_namespace_blk *nsblk; |
| 1558 | struct nvdimm_drvdata *ndd; |
| 1559 | int i, l, count = 0; |
| 1560 | struct resource *res; |
| 1561 | |
| 1562 | if (nd_region->ndr_mappings == 0) |
| 1563 | return NULL; |
| 1564 | |
| 1565 | ndd = to_ndd(nd_mapping); |
| 1566 | for_each_label(l, nd_label, nd_mapping->labels) { |
| 1567 | u32 flags = __le32_to_cpu(nd_label->flags); |
| 1568 | char *name[NSLABEL_NAME_LEN]; |
| 1569 | struct device **__devs; |
| 1570 | |
| 1571 | if (flags & NSLABEL_FLAG_LOCAL) |
| 1572 | /* pass */; |
| 1573 | else |
| 1574 | continue; |
| 1575 | |
| 1576 | for (i = 0; i < count; i++) { |
| 1577 | nsblk = to_nd_namespace_blk(devs[i]); |
| 1578 | if (memcmp(nsblk->uuid, nd_label->uuid, |
| 1579 | NSLABEL_UUID_LEN) == 0) { |
| 1580 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
| 1581 | __le64_to_cpu(nd_label->dpa)); |
| 1582 | if (!res) |
| 1583 | goto err; |
| 1584 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1585 | dev_name(&nsblk->common.dev)); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1586 | break; |
| 1587 | } |
| 1588 | } |
| 1589 | if (i < count) |
| 1590 | continue; |
| 1591 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); |
| 1592 | if (!__devs) |
| 1593 | goto err; |
| 1594 | memcpy(__devs, devs, sizeof(dev) * count); |
| 1595 | kfree(devs); |
| 1596 | devs = __devs; |
| 1597 | |
| 1598 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1599 | if (!nsblk) |
| 1600 | goto err; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1601 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1602 | dev->type = &namespace_blk_device_type; |
| 1603 | dev->parent = &nd_region->dev; |
| 1604 | dev_set_name(dev, "namespace%d.%d", nd_region->id, count); |
| 1605 | devs[count++] = dev; |
| 1606 | nsblk->id = -1; |
| 1607 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); |
| 1608 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, |
| 1609 | GFP_KERNEL); |
| 1610 | if (!nsblk->uuid) |
| 1611 | goto err; |
| 1612 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); |
| 1613 | if (name[0]) |
| 1614 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, |
| 1615 | GFP_KERNEL); |
| 1616 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
| 1617 | __le64_to_cpu(nd_label->dpa)); |
| 1618 | if (!res) |
| 1619 | goto err; |
| 1620 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1621 | dev_name(&nsblk->common.dev)); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1622 | } |
| 1623 | |
| 1624 | dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n", |
| 1625 | __func__, count, count == 1 ? "" : "s"); |
| 1626 | |
| 1627 | if (count == 0) { |
| 1628 | /* Publish a zero-sized namespace for userspace to configure. */ |
| 1629 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1630 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1631 | |
| 1632 | kfree(nd_mapping->labels); |
| 1633 | nd_mapping->labels = NULL; |
| 1634 | } |
| 1635 | |
| 1636 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); |
| 1637 | if (!devs) |
| 1638 | goto err; |
| 1639 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
| 1640 | if (!nsblk) |
| 1641 | goto err; |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1642 | dev = &nsblk->common.dev; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1643 | dev->type = &namespace_blk_device_type; |
| 1644 | dev->parent = &nd_region->dev; |
| 1645 | devs[count++] = dev; |
| 1646 | } |
| 1647 | |
| 1648 | return devs; |
| 1649 | |
| 1650 | err: |
| 1651 | for (i = 0; i < count; i++) { |
| 1652 | nsblk = to_nd_namespace_blk(devs[i]); |
Dan Williams | 8c2f7e8 | 2015-06-25 04:20:04 -0400 | [diff] [blame^] | 1653 | namespace_blk_release(&nsblk->common.dev); |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1654 | } |
| 1655 | kfree(devs); |
| 1656 | return NULL; |
| 1657 | } |
| 1658 | |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1659 | static int init_active_labels(struct nd_region *nd_region) |
| 1660 | { |
| 1661 | int i; |
| 1662 | |
| 1663 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
| 1664 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
| 1665 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
| 1666 | struct nvdimm *nvdimm = nd_mapping->nvdimm; |
| 1667 | int count, j; |
| 1668 | |
| 1669 | /* |
| 1670 | * If the dimm is disabled then prevent the region from |
| 1671 | * being activated if it aliases DPA. |
| 1672 | */ |
| 1673 | if (!ndd) { |
| 1674 | if ((nvdimm->flags & NDD_ALIASING) == 0) |
| 1675 | return 0; |
| 1676 | dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", |
| 1677 | dev_name(&nd_mapping->nvdimm->dev)); |
| 1678 | return -ENXIO; |
| 1679 | } |
| 1680 | nd_mapping->ndd = ndd; |
| 1681 | atomic_inc(&nvdimm->busy); |
| 1682 | get_ndd(ndd); |
| 1683 | |
| 1684 | count = nd_label_active_count(ndd); |
| 1685 | dev_dbg(ndd->dev, "%s: %d\n", __func__, count); |
| 1686 | if (!count) |
| 1687 | continue; |
| 1688 | nd_mapping->labels = kcalloc(count + 1, sizeof(void *), |
| 1689 | GFP_KERNEL); |
| 1690 | if (!nd_mapping->labels) |
| 1691 | return -ENOMEM; |
| 1692 | for (j = 0; j < count; j++) { |
| 1693 | struct nd_namespace_label *label; |
| 1694 | |
| 1695 | label = nd_label_active(ndd, j); |
| 1696 | nd_mapping->labels[j] = label; |
| 1697 | } |
| 1698 | } |
| 1699 | |
| 1700 | return 0; |
| 1701 | } |
| 1702 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1703 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
| 1704 | { |
| 1705 | struct device **devs = NULL; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1706 | int i, rc = 0, type; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1707 | |
| 1708 | *err = 0; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1709 | nvdimm_bus_lock(&nd_region->dev); |
| 1710 | rc = init_active_labels(nd_region); |
| 1711 | if (rc) { |
| 1712 | nvdimm_bus_unlock(&nd_region->dev); |
| 1713 | return rc; |
| 1714 | } |
| 1715 | |
| 1716 | type = nd_region_to_nstype(nd_region); |
| 1717 | switch (type) { |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1718 | case ND_DEVICE_NAMESPACE_IO: |
| 1719 | devs = create_namespace_io(nd_region); |
| 1720 | break; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1721 | case ND_DEVICE_NAMESPACE_PMEM: |
| 1722 | devs = create_namespace_pmem(nd_region); |
| 1723 | break; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1724 | case ND_DEVICE_NAMESPACE_BLK: |
| 1725 | devs = create_namespace_blk(nd_region); |
| 1726 | break; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1727 | default: |
| 1728 | break; |
| 1729 | } |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 1730 | nvdimm_bus_unlock(&nd_region->dev); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1731 | |
| 1732 | if (!devs) |
| 1733 | return -ENODEV; |
| 1734 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1735 | for (i = 0; devs[i]; i++) { |
| 1736 | struct device *dev = devs[i]; |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1737 | int id; |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1738 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1739 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
| 1740 | struct nd_namespace_blk *nsblk; |
| 1741 | |
| 1742 | nsblk = to_nd_namespace_blk(dev); |
| 1743 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, |
| 1744 | GFP_KERNEL); |
| 1745 | nsblk->id = id; |
| 1746 | } else |
| 1747 | id = i; |
| 1748 | |
| 1749 | if (id < 0) |
| 1750 | break; |
| 1751 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1752 | dev->groups = nd_namespace_attribute_groups; |
| 1753 | nd_device_register(dev); |
| 1754 | } |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1755 | if (i) |
| 1756 | nd_region->ns_seed = devs[0]; |
| 1757 | |
| 1758 | if (devs[i]) { |
| 1759 | int j; |
| 1760 | |
| 1761 | for (j = i; devs[j]; j++) { |
| 1762 | struct device *dev = devs[j]; |
| 1763 | |
| 1764 | device_initialize(dev); |
| 1765 | put_device(dev); |
| 1766 | } |
| 1767 | *err = j - i; |
| 1768 | /* |
| 1769 | * All of the namespaces we tried to register failed, so |
| 1770 | * fail region activation. |
| 1771 | */ |
| 1772 | if (*err == 0) |
| 1773 | rc = -ENODEV; |
| 1774 | } |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1775 | kfree(devs); |
| 1776 | |
Dan Williams | 1b40e09 | 2015-05-01 13:34:01 -0400 | [diff] [blame] | 1777 | if (rc == -ENODEV) |
| 1778 | return rc; |
| 1779 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 1780 | return i; |
| 1781 | } |