1 /* 2 * This is the linux wireless configuration interface. 3 * 4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * Copyright 2015 Intel Deutschland GmbH 7 */ 8 9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 10 11 #include <linux/if.h> 12 #include <linux/module.h> 13 #include <linux/err.h> 14 #include <linux/list.h> 15 #include <linux/slab.h> 16 #include <linux/nl80211.h> 17 #include <linux/debugfs.h> 18 #include <linux/notifier.h> 19 #include <linux/device.h> 20 #include <linux/etherdevice.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/sched.h> 23 #include <net/genetlink.h> 24 #include <net/cfg80211.h> 25 #include "nl80211.h" 26 #include "core.h" 27 #include "sysfs.h" 28 #include "debugfs.h" 29 #include "wext-compat.h" 30 #include "rdev-ops.h" 31 32 /* name for sysfs, %d is appended */ 33 #define PHY_NAME "phy" 34 35 MODULE_AUTHOR("Johannes Berg"); 36 MODULE_LICENSE("GPL"); 37 MODULE_DESCRIPTION("wireless configuration support"); 38 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 39 40 /* RCU-protected (and RTNL for writers) */ 41 LIST_HEAD(cfg80211_rdev_list); 42 int cfg80211_rdev_list_generation; 43 44 /* for debugfs */ 45 static struct dentry *ieee80211_debugfs_dir; 46 47 /* for the cleanup, scan and event works */ 48 struct workqueue_struct *cfg80211_wq; 49 50 static bool cfg80211_disable_40mhz_24ghz; 51 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 52 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 53 "Disable 40MHz support in the 2.4GHz band"); 54 55 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 56 { 57 struct cfg80211_registered_device *result = NULL, *rdev; 58 59 ASSERT_RTNL(); 60 61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 62 if (rdev->wiphy_idx == wiphy_idx) { 63 result = rdev; 64 break; 65 } 66 } 67 68 return result; 69 } 70 71 int get_wiphy_idx(struct wiphy *wiphy) 72 { 73 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 74 75 return rdev->wiphy_idx; 76 } 77 78 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 79 { 80 struct cfg80211_registered_device *rdev; 81 82 ASSERT_RTNL(); 83 84 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 85 if (!rdev) 86 return NULL; 87 return &rdev->wiphy; 88 } 89 90 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 91 const char *newname) 92 { 93 struct cfg80211_registered_device *rdev2; 94 int wiphy_idx, taken = -1, digits; 95 96 ASSERT_RTNL(); 97 98 /* prohibit calling the thing phy%d when %d is not its number */ 99 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 100 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 101 /* count number of places needed to print wiphy_idx */ 102 digits = 1; 103 while (wiphy_idx /= 10) 104 digits++; 105 /* 106 * deny the name if it is phy<idx> where <idx> is printed 107 * without leading zeroes. taken == strlen(newname) here 108 */ 109 if (taken == strlen(PHY_NAME) + digits) 110 return -EINVAL; 111 } 112 113 /* Ensure another device does not already have this name. */ 114 list_for_each_entry(rdev2, &cfg80211_rdev_list, list) 115 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 116 return -EINVAL; 117 118 return 0; 119 } 120 121 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 122 char *newname) 123 { 124 int result; 125 126 ASSERT_RTNL(); 127 128 /* Ignore nop renames */ 129 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 130 return 0; 131 132 result = cfg80211_dev_check_name(rdev, newname); 133 if (result < 0) 134 return result; 135 136 result = device_rename(&rdev->wiphy.dev, newname); 137 if (result) 138 return result; 139 140 if (rdev->wiphy.debugfsdir && 141 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, 142 rdev->wiphy.debugfsdir, 143 rdev->wiphy.debugfsdir->d_parent, 144 newname)) 145 pr_err("failed to rename debugfs dir to %s!\n", newname); 146 147 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 148 149 return 0; 150 } 151 152 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 153 struct net *net) 154 { 155 struct wireless_dev *wdev; 156 int err = 0; 157 158 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 159 return -EOPNOTSUPP; 160 161 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 162 if (!wdev->netdev) 163 continue; 164 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 166 if (err) 167 break; 168 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 169 } 170 171 if (err) { 172 /* failed -- clean up to old netns */ 173 net = wiphy_net(&rdev->wiphy); 174 175 list_for_each_entry_continue_reverse(wdev, 176 &rdev->wiphy.wdev_list, 177 list) { 178 if (!wdev->netdev) 179 continue; 180 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 181 err = dev_change_net_namespace(wdev->netdev, net, 182 "wlan%d"); 183 WARN_ON(err); 184 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 185 } 186 187 return err; 188 } 189 190 wiphy_net_set(&rdev->wiphy, net); 191 192 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 193 WARN_ON(err); 194 195 return 0; 196 } 197 198 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 199 { 200 struct cfg80211_registered_device *rdev = data; 201 202 rdev_rfkill_poll(rdev); 203 } 204 205 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 206 struct wireless_dev *wdev) 207 { 208 ASSERT_RTNL(); 209 210 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 211 return; 212 213 if (!wdev_running(wdev)) 214 return; 215 216 rdev_stop_p2p_device(rdev, wdev); 217 wdev->is_running = false; 218 219 rdev->opencount--; 220 221 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 222 if (WARN_ON(!rdev->scan_req->notified)) 223 rdev->scan_req->info.aborted = true; 224 ___cfg80211_scan_done(rdev, false); 225 } 226 } 227 228 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 229 struct wireless_dev *wdev) 230 { 231 ASSERT_RTNL(); 232 233 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 234 return; 235 236 if (!wdev_running(wdev)) 237 return; 238 239 rdev_stop_nan(rdev, wdev); 240 wdev->is_running = false; 241 242 rdev->opencount--; 243 } 244 245 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 246 { 247 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 248 struct wireless_dev *wdev; 249 250 ASSERT_RTNL(); 251 252 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 253 if (wdev->netdev) { 254 dev_close(wdev->netdev); 255 continue; 256 } 257 /* otherwise, check iftype */ 258 switch (wdev->iftype) { 259 case NL80211_IFTYPE_P2P_DEVICE: 260 cfg80211_stop_p2p_device(rdev, wdev); 261 break; 262 case NL80211_IFTYPE_NAN: 263 cfg80211_stop_nan(rdev, wdev); 264 break; 265 default: 266 break; 267 } 268 } 269 } 270 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 271 272 static int cfg80211_rfkill_set_block(void *data, bool blocked) 273 { 274 struct cfg80211_registered_device *rdev = data; 275 276 if (!blocked) 277 return 0; 278 279 rtnl_lock(); 280 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 281 rtnl_unlock(); 282 283 return 0; 284 } 285 286 static void cfg80211_rfkill_sync_work(struct work_struct *work) 287 { 288 struct cfg80211_registered_device *rdev; 289 290 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); 291 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); 292 } 293 294 static void cfg80211_event_work(struct work_struct *work) 295 { 296 struct cfg80211_registered_device *rdev; 297 298 rdev = container_of(work, struct cfg80211_registered_device, 299 event_work); 300 301 rtnl_lock(); 302 cfg80211_process_rdev_events(rdev); 303 rtnl_unlock(); 304 } 305 306 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 307 { 308 struct cfg80211_iface_destroy *item; 309 310 ASSERT_RTNL(); 311 312 spin_lock_irq(&rdev->destroy_list_lock); 313 while ((item = list_first_entry_or_null(&rdev->destroy_list, 314 struct cfg80211_iface_destroy, 315 list))) { 316 struct wireless_dev *wdev, *tmp; 317 u32 nlportid = item->nlportid; 318 319 list_del(&item->list); 320 kfree(item); 321 spin_unlock_irq(&rdev->destroy_list_lock); 322 323 list_for_each_entry_safe(wdev, tmp, 324 &rdev->wiphy.wdev_list, list) { 325 if (nlportid == wdev->owner_nlportid) 326 rdev_del_virtual_intf(rdev, wdev); 327 } 328 329 spin_lock_irq(&rdev->destroy_list_lock); 330 } 331 spin_unlock_irq(&rdev->destroy_list_lock); 332 } 333 334 static void cfg80211_destroy_iface_wk(struct work_struct *work) 335 { 336 struct cfg80211_registered_device *rdev; 337 338 rdev = container_of(work, struct cfg80211_registered_device, 339 destroy_work); 340 341 rtnl_lock(); 342 cfg80211_destroy_ifaces(rdev); 343 rtnl_unlock(); 344 } 345 346 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 347 { 348 struct cfg80211_registered_device *rdev; 349 350 rdev = container_of(work, struct cfg80211_registered_device, 351 sched_scan_stop_wk); 352 353 rtnl_lock(); 354 355 __cfg80211_stop_sched_scan(rdev, false); 356 357 rtnl_unlock(); 358 } 359 360 /* exported functions */ 361 362 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 363 const char *requested_name) 364 { 365 static atomic_t wiphy_counter = ATOMIC_INIT(0); 366 367 struct cfg80211_registered_device *rdev; 368 int alloc_size; 369 370 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 371 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 372 WARN_ON(ops->connect && !ops->disconnect); 373 WARN_ON(ops->join_ibss && !ops->leave_ibss); 374 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 375 WARN_ON(ops->add_station && !ops->del_station); 376 WARN_ON(ops->add_mpath && !ops->del_mpath); 377 WARN_ON(ops->join_mesh && !ops->leave_mesh); 378 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 379 WARN_ON(ops->start_ap && !ops->stop_ap); 380 WARN_ON(ops->join_ocb && !ops->leave_ocb); 381 WARN_ON(ops->suspend && !ops->resume); 382 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 383 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 384 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 385 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 386 387 alloc_size = sizeof(*rdev) + sizeof_priv; 388 389 rdev = kzalloc(alloc_size, GFP_KERNEL); 390 if (!rdev) 391 return NULL; 392 393 rdev->ops = ops; 394 395 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 396 397 if (unlikely(rdev->wiphy_idx < 0)) { 398 /* ugh, wrapped! */ 399 atomic_dec(&wiphy_counter); 400 kfree(rdev); 401 return NULL; 402 } 403 404 /* atomic_inc_return makes it start at 1, make it start at 0 */ 405 rdev->wiphy_idx--; 406 407 /* give it a proper name */ 408 if (requested_name && requested_name[0]) { 409 int rv; 410 411 rtnl_lock(); 412 rv = cfg80211_dev_check_name(rdev, requested_name); 413 414 if (rv < 0) { 415 rtnl_unlock(); 416 goto use_default_name; 417 } 418 419 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 420 rtnl_unlock(); 421 if (rv) 422 goto use_default_name; 423 } else { 424 use_default_name: 425 /* NOTE: This is *probably* safe w/out holding rtnl because of 426 * the restrictions on phy names. Probably this call could 427 * fail if some other part of the kernel (re)named a device 428 * phyX. But, might should add some locking and check return 429 * value, and use a different name if this one exists? 430 */ 431 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 432 } 433 434 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 435 INIT_LIST_HEAD(&rdev->beacon_registrations); 436 spin_lock_init(&rdev->beacon_registrations_lock); 437 spin_lock_init(&rdev->bss_lock); 438 INIT_LIST_HEAD(&rdev->bss_list); 439 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 440 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); 441 INIT_LIST_HEAD(&rdev->mlme_unreg); 442 spin_lock_init(&rdev->mlme_unreg_lock); 443 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 444 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 445 cfg80211_dfs_channels_update_work); 446 #ifdef CONFIG_CFG80211_WEXT 447 rdev->wiphy.wext = &cfg80211_wext_handler; 448 #endif 449 450 device_initialize(&rdev->wiphy.dev); 451 rdev->wiphy.dev.class = &ieee80211_class; 452 rdev->wiphy.dev.platform_data = rdev; 453 device_enable_async_suspend(&rdev->wiphy.dev); 454 455 INIT_LIST_HEAD(&rdev->destroy_list); 456 spin_lock_init(&rdev->destroy_list_lock); 457 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 458 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 459 460 #ifdef CONFIG_CFG80211_DEFAULT_PS 461 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 462 #endif 463 464 wiphy_net_set(&rdev->wiphy, &init_net); 465 466 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 467 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 468 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 469 &rdev->rfkill_ops, rdev); 470 471 if (!rdev->rfkill) { 472 kfree(rdev); 473 return NULL; 474 } 475 476 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 477 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 478 INIT_WORK(&rdev->event_work, cfg80211_event_work); 479 480 init_waitqueue_head(&rdev->dev_wait); 481 482 /* 483 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 484 * Fragmentation and RTS threshold are disabled by default with the 485 * special -1 value. 486 */ 487 rdev->wiphy.retry_short = 7; 488 rdev->wiphy.retry_long = 4; 489 rdev->wiphy.frag_threshold = (u32) -1; 490 rdev->wiphy.rts_threshold = (u32) -1; 491 rdev->wiphy.coverage_class = 0; 492 493 rdev->wiphy.max_num_csa_counters = 1; 494 495 rdev->wiphy.max_sched_scan_plans = 1; 496 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 497 498 return &rdev->wiphy; 499 } 500 EXPORT_SYMBOL(wiphy_new_nm); 501 502 static int wiphy_verify_combinations(struct wiphy *wiphy) 503 { 504 const struct ieee80211_iface_combination *c; 505 int i, j; 506 507 for (i = 0; i < wiphy->n_iface_combinations; i++) { 508 u32 cnt = 0; 509 u16 all_iftypes = 0; 510 511 c = &wiphy->iface_combinations[i]; 512 513 /* 514 * Combinations with just one interface aren't real, 515 * however we make an exception for DFS. 516 */ 517 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 518 return -EINVAL; 519 520 /* Need at least one channel */ 521 if (WARN_ON(!c->num_different_channels)) 522 return -EINVAL; 523 524 /* 525 * Put a sane limit on maximum number of different 526 * channels to simplify channel accounting code. 527 */ 528 if (WARN_ON(c->num_different_channels > 529 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 530 return -EINVAL; 531 532 /* DFS only works on one channel. */ 533 if (WARN_ON(c->radar_detect_widths && 534 (c->num_different_channels > 1))) 535 return -EINVAL; 536 537 if (WARN_ON(!c->n_limits)) 538 return -EINVAL; 539 540 for (j = 0; j < c->n_limits; j++) { 541 u16 types = c->limits[j].types; 542 543 /* interface types shouldn't overlap */ 544 if (WARN_ON(types & all_iftypes)) 545 return -EINVAL; 546 all_iftypes |= types; 547 548 if (WARN_ON(!c->limits[j].max)) 549 return -EINVAL; 550 551 /* Shouldn't list software iftypes in combinations! */ 552 if (WARN_ON(wiphy->software_iftypes & types)) 553 return -EINVAL; 554 555 /* Only a single P2P_DEVICE can be allowed */ 556 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 557 c->limits[j].max > 1)) 558 return -EINVAL; 559 560 /* Only a single NAN can be allowed */ 561 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 562 c->limits[j].max > 1)) 563 return -EINVAL; 564 565 /* 566 * This isn't well-defined right now. If you have an 567 * IBSS interface, then its beacon interval may change 568 * by joining other networks, and nothing prevents it 569 * from doing that. 570 * So technically we probably shouldn't even allow AP 571 * and IBSS in the same interface, but it seems that 572 * some drivers support that, possibly only with fixed 573 * beacon intervals for IBSS. 574 */ 575 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 576 c->beacon_int_min_gcd)) { 577 return -EINVAL; 578 } 579 580 cnt += c->limits[j].max; 581 /* 582 * Don't advertise an unsupported type 583 * in a combination. 584 */ 585 if (WARN_ON((wiphy->interface_modes & types) != types)) 586 return -EINVAL; 587 } 588 589 #ifndef CONFIG_WIRELESS_WDS 590 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 591 return -EINVAL; 592 #endif 593 594 /* You can't even choose that many! */ 595 if (WARN_ON(cnt < c->max_interfaces)) 596 return -EINVAL; 597 } 598 599 return 0; 600 } 601 602 int wiphy_register(struct wiphy *wiphy) 603 { 604 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 605 int res; 606 enum nl80211_band band; 607 struct ieee80211_supported_band *sband; 608 bool have_band = false; 609 int i; 610 u16 ifmodes = wiphy->interface_modes; 611 612 #ifdef CONFIG_PM 613 if (WARN_ON(wiphy->wowlan && 614 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 615 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 616 return -EINVAL; 617 if (WARN_ON(wiphy->wowlan && 618 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 619 !wiphy->wowlan->tcp)) 620 return -EINVAL; 621 #endif 622 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 623 (!rdev->ops->tdls_channel_switch || 624 !rdev->ops->tdls_cancel_channel_switch))) 625 return -EINVAL; 626 627 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 628 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 629 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 630 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 631 return -EINVAL; 632 633 #ifndef CONFIG_WIRELESS_WDS 634 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 635 return -EINVAL; 636 #endif 637 638 /* 639 * if a wiphy has unsupported modes for regulatory channel enforcement, 640 * opt-out of enforcement checking 641 */ 642 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 643 BIT(NL80211_IFTYPE_P2P_CLIENT) | 644 BIT(NL80211_IFTYPE_AP) | 645 BIT(NL80211_IFTYPE_P2P_GO) | 646 BIT(NL80211_IFTYPE_ADHOC) | 647 BIT(NL80211_IFTYPE_P2P_DEVICE) | 648 BIT(NL80211_IFTYPE_NAN) | 649 BIT(NL80211_IFTYPE_AP_VLAN) | 650 BIT(NL80211_IFTYPE_MONITOR))) 651 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 652 653 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 654 (wiphy->regulatory_flags & 655 (REGULATORY_CUSTOM_REG | 656 REGULATORY_STRICT_REG | 657 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 658 REGULATORY_COUNTRY_IE_IGNORE)))) 659 return -EINVAL; 660 661 if (WARN_ON(wiphy->coalesce && 662 (!wiphy->coalesce->n_rules || 663 !wiphy->coalesce->n_patterns) && 664 (!wiphy->coalesce->pattern_min_len || 665 wiphy->coalesce->pattern_min_len > 666 wiphy->coalesce->pattern_max_len))) 667 return -EINVAL; 668 669 if (WARN_ON(wiphy->ap_sme_capa && 670 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 671 return -EINVAL; 672 673 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 674 return -EINVAL; 675 676 if (WARN_ON(wiphy->addresses && 677 !is_zero_ether_addr(wiphy->perm_addr) && 678 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 679 ETH_ALEN))) 680 return -EINVAL; 681 682 if (WARN_ON(wiphy->max_acl_mac_addrs && 683 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 684 !rdev->ops->set_mac_acl))) 685 return -EINVAL; 686 687 /* assure only valid behaviours are flagged by driver 688 * hence subtract 2 as bit 0 is invalid. 689 */ 690 if (WARN_ON(wiphy->bss_select_support && 691 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 692 return -EINVAL; 693 694 if (wiphy->addresses) 695 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 696 697 /* sanity check ifmodes */ 698 WARN_ON(!ifmodes); 699 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 700 if (WARN_ON(ifmodes != wiphy->interface_modes)) 701 wiphy->interface_modes = ifmodes; 702 703 res = wiphy_verify_combinations(wiphy); 704 if (res) 705 return res; 706 707 /* sanity check supported bands/channels */ 708 for (band = 0; band < NUM_NL80211_BANDS; band++) { 709 sband = wiphy->bands[band]; 710 if (!sband) 711 continue; 712 713 sband->band = band; 714 if (WARN_ON(!sband->n_channels)) 715 return -EINVAL; 716 /* 717 * on 60GHz band, there are no legacy rates, so 718 * n_bitrates is 0 719 */ 720 if (WARN_ON(band != NL80211_BAND_60GHZ && 721 !sband->n_bitrates)) 722 return -EINVAL; 723 724 /* 725 * Since cfg80211_disable_40mhz_24ghz is global, we can 726 * modify the sband's ht data even if the driver uses a 727 * global structure for that. 728 */ 729 if (cfg80211_disable_40mhz_24ghz && 730 band == NL80211_BAND_2GHZ && 731 sband->ht_cap.ht_supported) { 732 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 733 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 734 } 735 736 /* 737 * Since we use a u32 for rate bitmaps in 738 * ieee80211_get_response_rate, we cannot 739 * have more than 32 legacy rates. 740 */ 741 if (WARN_ON(sband->n_bitrates > 32)) 742 return -EINVAL; 743 744 for (i = 0; i < sband->n_channels; i++) { 745 sband->channels[i].orig_flags = 746 sband->channels[i].flags; 747 sband->channels[i].orig_mag = INT_MAX; 748 sband->channels[i].orig_mpwr = 749 sband->channels[i].max_power; 750 sband->channels[i].band = band; 751 } 752 753 have_band = true; 754 } 755 756 if (!have_band) { 757 WARN_ON(1); 758 return -EINVAL; 759 } 760 761 #ifdef CONFIG_PM 762 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 763 (!rdev->wiphy.wowlan->pattern_min_len || 764 rdev->wiphy.wowlan->pattern_min_len > 765 rdev->wiphy.wowlan->pattern_max_len))) 766 return -EINVAL; 767 #endif 768 769 /* check and set up bitrates */ 770 ieee80211_set_bitrate_flags(wiphy); 771 772 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 773 774 rtnl_lock(); 775 res = device_add(&rdev->wiphy.dev); 776 if (res) { 777 rtnl_unlock(); 778 return res; 779 } 780 781 /* set up regulatory info */ 782 wiphy_regulatory_register(wiphy); 783 784 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 785 cfg80211_rdev_list_generation++; 786 787 /* add to debugfs */ 788 rdev->wiphy.debugfsdir = 789 debugfs_create_dir(wiphy_name(&rdev->wiphy), 790 ieee80211_debugfs_dir); 791 if (IS_ERR(rdev->wiphy.debugfsdir)) 792 rdev->wiphy.debugfsdir = NULL; 793 794 cfg80211_debugfs_rdev_add(rdev); 795 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 796 797 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 798 struct regulatory_request request; 799 800 request.wiphy_idx = get_wiphy_idx(wiphy); 801 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 802 request.alpha2[0] = '9'; 803 request.alpha2[1] = '9'; 804 805 nl80211_send_reg_change_event(&request); 806 } 807 808 /* Check that nobody globally advertises any capabilities they do not 809 * advertise on all possible interface types. 810 */ 811 if (wiphy->extended_capabilities_len && 812 wiphy->num_iftype_ext_capab && 813 wiphy->iftype_ext_capab) { 814 u8 supported_on_all, j; 815 const struct wiphy_iftype_ext_capab *capab; 816 817 capab = wiphy->iftype_ext_capab; 818 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 819 if (capab[0].extended_capabilities_len > j) 820 supported_on_all = 821 capab[0].extended_capabilities[j]; 822 else 823 supported_on_all = 0x00; 824 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 825 if (j >= capab[i].extended_capabilities_len) { 826 supported_on_all = 0x00; 827 break; 828 } 829 supported_on_all &= 830 capab[i].extended_capabilities[j]; 831 } 832 if (WARN_ON(wiphy->extended_capabilities[j] & 833 ~supported_on_all)) 834 break; 835 } 836 } 837 838 rdev->wiphy.registered = true; 839 rtnl_unlock(); 840 841 res = rfkill_register(rdev->rfkill); 842 if (res) { 843 rfkill_destroy(rdev->rfkill); 844 rdev->rfkill = NULL; 845 wiphy_unregister(&rdev->wiphy); 846 return res; 847 } 848 849 return 0; 850 } 851 EXPORT_SYMBOL(wiphy_register); 852 853 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 854 { 855 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 856 857 if (!rdev->ops->rfkill_poll) 858 return; 859 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 860 rfkill_resume_polling(rdev->rfkill); 861 } 862 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 863 864 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 865 { 866 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 867 868 rfkill_pause_polling(rdev->rfkill); 869 } 870 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 871 872 void wiphy_unregister(struct wiphy *wiphy) 873 { 874 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 875 876 wait_event(rdev->dev_wait, ({ 877 int __count; 878 rtnl_lock(); 879 __count = rdev->opencount; 880 rtnl_unlock(); 881 __count == 0; })); 882 883 if (rdev->rfkill) 884 rfkill_unregister(rdev->rfkill); 885 886 rtnl_lock(); 887 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 888 rdev->wiphy.registered = false; 889 890 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 891 892 /* 893 * First remove the hardware from everywhere, this makes 894 * it impossible to find from userspace. 895 */ 896 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 897 list_del_rcu(&rdev->list); 898 synchronize_rcu(); 899 900 /* 901 * If this device got a regulatory hint tell core its 902 * free to listen now to a new shiny device regulatory hint 903 */ 904 wiphy_regulatory_deregister(wiphy); 905 906 cfg80211_rdev_list_generation++; 907 device_del(&rdev->wiphy.dev); 908 909 rtnl_unlock(); 910 911 flush_work(&rdev->scan_done_wk); 912 cancel_work_sync(&rdev->conn_work); 913 flush_work(&rdev->event_work); 914 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 915 flush_work(&rdev->destroy_work); 916 flush_work(&rdev->sched_scan_stop_wk); 917 flush_work(&rdev->mlme_unreg_wk); 918 919 #ifdef CONFIG_PM 920 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 921 rdev_set_wakeup(rdev, false); 922 #endif 923 cfg80211_rdev_free_wowlan(rdev); 924 cfg80211_rdev_free_coalesce(rdev); 925 } 926 EXPORT_SYMBOL(wiphy_unregister); 927 928 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 929 { 930 struct cfg80211_internal_bss *scan, *tmp; 931 struct cfg80211_beacon_registration *reg, *treg; 932 rfkill_destroy(rdev->rfkill); 933 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 934 list_del(®->list); 935 kfree(reg); 936 } 937 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 938 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 939 kfree(rdev); 940 } 941 942 void wiphy_free(struct wiphy *wiphy) 943 { 944 put_device(&wiphy->dev); 945 } 946 EXPORT_SYMBOL(wiphy_free); 947 948 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 949 { 950 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 951 952 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 953 schedule_work(&rdev->rfkill_sync); 954 } 955 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 956 957 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 958 { 959 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 960 961 ASSERT_RTNL(); 962 963 if (WARN_ON(wdev->netdev)) 964 return; 965 966 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 967 968 list_del_rcu(&wdev->list); 969 rdev->devlist_generation++; 970 971 switch (wdev->iftype) { 972 case NL80211_IFTYPE_P2P_DEVICE: 973 cfg80211_mlme_purge_registrations(wdev); 974 cfg80211_stop_p2p_device(rdev, wdev); 975 break; 976 case NL80211_IFTYPE_NAN: 977 cfg80211_stop_nan(rdev, wdev); 978 break; 979 default: 980 WARN_ON_ONCE(1); 981 break; 982 } 983 } 984 EXPORT_SYMBOL(cfg80211_unregister_wdev); 985 986 static const struct device_type wiphy_type = { 987 .name = "wlan", 988 }; 989 990 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 991 enum nl80211_iftype iftype, int num) 992 { 993 ASSERT_RTNL(); 994 995 rdev->num_running_ifaces += num; 996 if (iftype == NL80211_IFTYPE_MONITOR) 997 rdev->num_running_monitor_ifaces += num; 998 } 999 1000 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1001 struct wireless_dev *wdev) 1002 { 1003 struct net_device *dev = wdev->netdev; 1004 struct cfg80211_sched_scan_request *sched_scan_req; 1005 1006 ASSERT_RTNL(); 1007 ASSERT_WDEV_LOCK(wdev); 1008 1009 switch (wdev->iftype) { 1010 case NL80211_IFTYPE_ADHOC: 1011 __cfg80211_leave_ibss(rdev, dev, true); 1012 break; 1013 case NL80211_IFTYPE_P2P_CLIENT: 1014 case NL80211_IFTYPE_STATION: 1015 sched_scan_req = rtnl_dereference(rdev->sched_scan_req); 1016 if (sched_scan_req && dev == sched_scan_req->dev) 1017 __cfg80211_stop_sched_scan(rdev, false); 1018 1019 #ifdef CONFIG_CFG80211_WEXT 1020 kfree(wdev->wext.ie); 1021 wdev->wext.ie = NULL; 1022 wdev->wext.ie_len = 0; 1023 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1024 #endif 1025 cfg80211_disconnect(rdev, dev, 1026 WLAN_REASON_DEAUTH_LEAVING, true); 1027 break; 1028 case NL80211_IFTYPE_MESH_POINT: 1029 __cfg80211_leave_mesh(rdev, dev); 1030 break; 1031 case NL80211_IFTYPE_AP: 1032 case NL80211_IFTYPE_P2P_GO: 1033 __cfg80211_stop_ap(rdev, dev, true); 1034 break; 1035 case NL80211_IFTYPE_OCB: 1036 __cfg80211_leave_ocb(rdev, dev); 1037 break; 1038 case NL80211_IFTYPE_WDS: 1039 /* must be handled by mac80211/driver, has no APIs */ 1040 break; 1041 case NL80211_IFTYPE_P2P_DEVICE: 1042 case NL80211_IFTYPE_NAN: 1043 /* cannot happen, has no netdev */ 1044 break; 1045 case NL80211_IFTYPE_AP_VLAN: 1046 case NL80211_IFTYPE_MONITOR: 1047 /* nothing to do */ 1048 break; 1049 case NL80211_IFTYPE_UNSPECIFIED: 1050 case NUM_NL80211_IFTYPES: 1051 /* invalid */ 1052 break; 1053 } 1054 } 1055 1056 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1057 struct wireless_dev *wdev) 1058 { 1059 wdev_lock(wdev); 1060 __cfg80211_leave(rdev, wdev); 1061 wdev_unlock(wdev); 1062 } 1063 1064 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1065 gfp_t gfp) 1066 { 1067 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1068 struct cfg80211_event *ev; 1069 unsigned long flags; 1070 1071 trace_cfg80211_stop_iface(wiphy, wdev); 1072 1073 ev = kzalloc(sizeof(*ev), gfp); 1074 if (!ev) 1075 return; 1076 1077 ev->type = EVENT_STOPPED; 1078 1079 spin_lock_irqsave(&wdev->event_lock, flags); 1080 list_add_tail(&ev->list, &wdev->event_list); 1081 spin_unlock_irqrestore(&wdev->event_lock, flags); 1082 queue_work(cfg80211_wq, &rdev->event_work); 1083 } 1084 EXPORT_SYMBOL(cfg80211_stop_iface); 1085 1086 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1087 unsigned long state, void *ptr) 1088 { 1089 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1090 struct wireless_dev *wdev = dev->ieee80211_ptr; 1091 struct cfg80211_registered_device *rdev; 1092 struct cfg80211_sched_scan_request *sched_scan_req; 1093 1094 if (!wdev) 1095 return NOTIFY_DONE; 1096 1097 rdev = wiphy_to_rdev(wdev->wiphy); 1098 1099 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1100 1101 switch (state) { 1102 case NETDEV_POST_INIT: 1103 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1104 break; 1105 case NETDEV_REGISTER: 1106 /* 1107 * NB: cannot take rdev->mtx here because this may be 1108 * called within code protected by it when interfaces 1109 * are added with nl80211. 1110 */ 1111 mutex_init(&wdev->mtx); 1112 INIT_LIST_HEAD(&wdev->event_list); 1113 spin_lock_init(&wdev->event_lock); 1114 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1115 spin_lock_init(&wdev->mgmt_registrations_lock); 1116 1117 wdev->identifier = ++rdev->wdev_id; 1118 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1119 rdev->devlist_generation++; 1120 /* can only change netns with wiphy */ 1121 dev->features |= NETIF_F_NETNS_LOCAL; 1122 1123 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1124 "phy80211")) { 1125 pr_err("failed to add phy80211 symlink to netdev!\n"); 1126 } 1127 wdev->netdev = dev; 1128 #ifdef CONFIG_CFG80211_WEXT 1129 wdev->wext.default_key = -1; 1130 wdev->wext.default_mgmt_key = -1; 1131 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1132 #endif 1133 1134 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1135 wdev->ps = true; 1136 else 1137 wdev->ps = false; 1138 /* allow mac80211 to determine the timeout */ 1139 wdev->ps_timeout = -1; 1140 1141 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1142 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1143 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1144 dev->priv_flags |= IFF_DONT_BRIDGE; 1145 1146 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1147 1148 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1149 break; 1150 case NETDEV_GOING_DOWN: 1151 cfg80211_leave(rdev, wdev); 1152 break; 1153 case NETDEV_DOWN: 1154 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1155 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1156 if (WARN_ON(!rdev->scan_req->notified)) 1157 rdev->scan_req->info.aborted = true; 1158 ___cfg80211_scan_done(rdev, false); 1159 } 1160 1161 sched_scan_req = rtnl_dereference(rdev->sched_scan_req); 1162 if (WARN_ON(sched_scan_req && 1163 sched_scan_req->dev == wdev->netdev)) { 1164 __cfg80211_stop_sched_scan(rdev, false); 1165 } 1166 1167 rdev->opencount--; 1168 wake_up(&rdev->dev_wait); 1169 break; 1170 case NETDEV_UP: 1171 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1172 wdev_lock(wdev); 1173 switch (wdev->iftype) { 1174 #ifdef CONFIG_CFG80211_WEXT 1175 case NL80211_IFTYPE_ADHOC: 1176 cfg80211_ibss_wext_join(rdev, wdev); 1177 break; 1178 case NL80211_IFTYPE_STATION: 1179 cfg80211_mgd_wext_connect(rdev, wdev); 1180 break; 1181 #endif 1182 #ifdef CONFIG_MAC80211_MESH 1183 case NL80211_IFTYPE_MESH_POINT: 1184 { 1185 /* backward compat code... */ 1186 struct mesh_setup setup; 1187 memcpy(&setup, &default_mesh_setup, 1188 sizeof(setup)); 1189 /* back compat only needed for mesh_id */ 1190 setup.mesh_id = wdev->ssid; 1191 setup.mesh_id_len = wdev->mesh_id_up_len; 1192 if (wdev->mesh_id_up_len) 1193 __cfg80211_join_mesh(rdev, dev, 1194 &setup, 1195 &default_mesh_config); 1196 break; 1197 } 1198 #endif 1199 default: 1200 break; 1201 } 1202 wdev_unlock(wdev); 1203 rdev->opencount++; 1204 1205 /* 1206 * Configure power management to the driver here so that its 1207 * correctly set also after interface type changes etc. 1208 */ 1209 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1210 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1211 rdev->ops->set_power_mgmt) 1212 if (rdev_set_power_mgmt(rdev, dev, wdev->ps, 1213 wdev->ps_timeout)) { 1214 /* assume this means it's off */ 1215 wdev->ps = false; 1216 } 1217 break; 1218 case NETDEV_UNREGISTER: 1219 /* 1220 * It is possible to get NETDEV_UNREGISTER 1221 * multiple times. To detect that, check 1222 * that the interface is still on the list 1223 * of registered interfaces, and only then 1224 * remove and clean it up. 1225 */ 1226 if (!list_empty(&wdev->list)) { 1227 nl80211_notify_iface(rdev, wdev, 1228 NL80211_CMD_DEL_INTERFACE); 1229 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1230 list_del_rcu(&wdev->list); 1231 rdev->devlist_generation++; 1232 cfg80211_mlme_purge_registrations(wdev); 1233 #ifdef CONFIG_CFG80211_WEXT 1234 kzfree(wdev->wext.keys); 1235 #endif 1236 flush_work(&wdev->disconnect_wk); 1237 } 1238 /* 1239 * synchronise (so that we won't find this netdev 1240 * from other code any more) and then clear the list 1241 * head so that the above code can safely check for 1242 * !list_empty() to avoid double-cleanup. 1243 */ 1244 synchronize_rcu(); 1245 INIT_LIST_HEAD(&wdev->list); 1246 /* 1247 * Ensure that all events have been processed and 1248 * freed. 1249 */ 1250 cfg80211_process_wdev_events(wdev); 1251 1252 if (WARN_ON(wdev->current_bss)) { 1253 cfg80211_unhold_bss(wdev->current_bss); 1254 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1255 wdev->current_bss = NULL; 1256 } 1257 break; 1258 case NETDEV_PRE_UP: 1259 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 1260 return notifier_from_errno(-EOPNOTSUPP); 1261 if (rfkill_blocked(rdev->rfkill)) 1262 return notifier_from_errno(-ERFKILL); 1263 break; 1264 default: 1265 return NOTIFY_DONE; 1266 } 1267 1268 wireless_nlevent_flush(); 1269 1270 return NOTIFY_OK; 1271 } 1272 1273 static struct notifier_block cfg80211_netdev_notifier = { 1274 .notifier_call = cfg80211_netdev_notifier_call, 1275 }; 1276 1277 static void __net_exit cfg80211_pernet_exit(struct net *net) 1278 { 1279 struct cfg80211_registered_device *rdev; 1280 1281 rtnl_lock(); 1282 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1283 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1284 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1285 } 1286 rtnl_unlock(); 1287 } 1288 1289 static struct pernet_operations cfg80211_pernet_ops = { 1290 .exit = cfg80211_pernet_exit, 1291 }; 1292 1293 static int __init cfg80211_init(void) 1294 { 1295 int err; 1296 1297 err = register_pernet_device(&cfg80211_pernet_ops); 1298 if (err) 1299 goto out_fail_pernet; 1300 1301 err = wiphy_sysfs_init(); 1302 if (err) 1303 goto out_fail_sysfs; 1304 1305 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1306 if (err) 1307 goto out_fail_notifier; 1308 1309 err = nl80211_init(); 1310 if (err) 1311 goto out_fail_nl80211; 1312 1313 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1314 1315 err = regulatory_init(); 1316 if (err) 1317 goto out_fail_reg; 1318 1319 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1320 if (!cfg80211_wq) { 1321 err = -ENOMEM; 1322 goto out_fail_wq; 1323 } 1324 1325 return 0; 1326 1327 out_fail_wq: 1328 regulatory_exit(); 1329 out_fail_reg: 1330 debugfs_remove(ieee80211_debugfs_dir); 1331 nl80211_exit(); 1332 out_fail_nl80211: 1333 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1334 out_fail_notifier: 1335 wiphy_sysfs_exit(); 1336 out_fail_sysfs: 1337 unregister_pernet_device(&cfg80211_pernet_ops); 1338 out_fail_pernet: 1339 return err; 1340 } 1341 subsys_initcall(cfg80211_init); 1342 1343 static void __exit cfg80211_exit(void) 1344 { 1345 debugfs_remove(ieee80211_debugfs_dir); 1346 nl80211_exit(); 1347 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1348 wiphy_sysfs_exit(); 1349 regulatory_exit(); 1350 unregister_pernet_device(&cfg80211_pernet_ops); 1351 destroy_workqueue(cfg80211_wq); 1352 } 1353 module_exit(cfg80211_exit); 1354