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 wireless_dev *wdev, *tmp; 309 310 ASSERT_RTNL(); 311 312 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 313 if (wdev->nl_owner_dead) 314 rdev_del_virtual_intf(rdev, wdev); 315 } 316 } 317 318 static void cfg80211_destroy_iface_wk(struct work_struct *work) 319 { 320 struct cfg80211_registered_device *rdev; 321 322 rdev = container_of(work, struct cfg80211_registered_device, 323 destroy_work); 324 325 rtnl_lock(); 326 cfg80211_destroy_ifaces(rdev); 327 rtnl_unlock(); 328 } 329 330 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 331 { 332 struct cfg80211_registered_device *rdev; 333 struct cfg80211_sched_scan_request *req, *tmp; 334 335 rdev = container_of(work, struct cfg80211_registered_device, 336 sched_scan_stop_wk); 337 338 rtnl_lock(); 339 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 340 if (req->nl_owner_dead) 341 cfg80211_stop_sched_scan_req(rdev, req, false); 342 } 343 rtnl_unlock(); 344 } 345 346 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 347 { 348 struct cfg80211_registered_device *rdev; 349 350 rdev = container_of(work, struct cfg80211_registered_device, 351 propagate_radar_detect_wk); 352 353 rtnl_lock(); 354 355 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 356 NL80211_DFS_UNAVAILABLE, 357 NL80211_RADAR_DETECTED); 358 359 rtnl_unlock(); 360 } 361 362 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 363 { 364 struct cfg80211_registered_device *rdev; 365 366 rdev = container_of(work, struct cfg80211_registered_device, 367 propagate_cac_done_wk); 368 369 rtnl_lock(); 370 371 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 372 NL80211_DFS_AVAILABLE, 373 NL80211_RADAR_CAC_FINISHED); 374 375 rtnl_unlock(); 376 } 377 378 /* exported functions */ 379 380 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 381 const char *requested_name) 382 { 383 static atomic_t wiphy_counter = ATOMIC_INIT(0); 384 385 struct cfg80211_registered_device *rdev; 386 int alloc_size; 387 388 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 389 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 390 WARN_ON(ops->connect && !ops->disconnect); 391 WARN_ON(ops->join_ibss && !ops->leave_ibss); 392 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 393 WARN_ON(ops->add_station && !ops->del_station); 394 WARN_ON(ops->add_mpath && !ops->del_mpath); 395 WARN_ON(ops->join_mesh && !ops->leave_mesh); 396 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 397 WARN_ON(ops->start_ap && !ops->stop_ap); 398 WARN_ON(ops->join_ocb && !ops->leave_ocb); 399 WARN_ON(ops->suspend && !ops->resume); 400 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 401 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 402 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 403 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 404 405 alloc_size = sizeof(*rdev) + sizeof_priv; 406 407 rdev = kzalloc(alloc_size, GFP_KERNEL); 408 if (!rdev) 409 return NULL; 410 411 rdev->ops = ops; 412 413 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 414 415 if (unlikely(rdev->wiphy_idx < 0)) { 416 /* ugh, wrapped! */ 417 atomic_dec(&wiphy_counter); 418 kfree(rdev); 419 return NULL; 420 } 421 422 /* atomic_inc_return makes it start at 1, make it start at 0 */ 423 rdev->wiphy_idx--; 424 425 /* give it a proper name */ 426 if (requested_name && requested_name[0]) { 427 int rv; 428 429 rtnl_lock(); 430 rv = cfg80211_dev_check_name(rdev, requested_name); 431 432 if (rv < 0) { 433 rtnl_unlock(); 434 goto use_default_name; 435 } 436 437 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 438 rtnl_unlock(); 439 if (rv) 440 goto use_default_name; 441 } else { 442 use_default_name: 443 /* NOTE: This is *probably* safe w/out holding rtnl because of 444 * the restrictions on phy names. Probably this call could 445 * fail if some other part of the kernel (re)named a device 446 * phyX. But, might should add some locking and check return 447 * value, and use a different name if this one exists? 448 */ 449 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 450 } 451 452 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 453 INIT_LIST_HEAD(&rdev->beacon_registrations); 454 spin_lock_init(&rdev->beacon_registrations_lock); 455 spin_lock_init(&rdev->bss_lock); 456 INIT_LIST_HEAD(&rdev->bss_list); 457 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 458 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 459 INIT_LIST_HEAD(&rdev->mlme_unreg); 460 spin_lock_init(&rdev->mlme_unreg_lock); 461 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 462 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 463 cfg80211_dfs_channels_update_work); 464 #ifdef CONFIG_CFG80211_WEXT 465 rdev->wiphy.wext = &cfg80211_wext_handler; 466 #endif 467 468 device_initialize(&rdev->wiphy.dev); 469 rdev->wiphy.dev.class = &ieee80211_class; 470 rdev->wiphy.dev.platform_data = rdev; 471 device_enable_async_suspend(&rdev->wiphy.dev); 472 473 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 474 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 475 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 476 INIT_WORK(&rdev->propagate_radar_detect_wk, 477 cfg80211_propagate_radar_detect_wk); 478 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 479 480 #ifdef CONFIG_CFG80211_DEFAULT_PS 481 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 482 #endif 483 484 wiphy_net_set(&rdev->wiphy, &init_net); 485 486 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 487 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 488 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 489 &rdev->rfkill_ops, rdev); 490 491 if (!rdev->rfkill) { 492 kfree(rdev); 493 return NULL; 494 } 495 496 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 497 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 498 INIT_WORK(&rdev->event_work, cfg80211_event_work); 499 500 init_waitqueue_head(&rdev->dev_wait); 501 502 /* 503 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 504 * Fragmentation and RTS threshold are disabled by default with the 505 * special -1 value. 506 */ 507 rdev->wiphy.retry_short = 7; 508 rdev->wiphy.retry_long = 4; 509 rdev->wiphy.frag_threshold = (u32) -1; 510 rdev->wiphy.rts_threshold = (u32) -1; 511 rdev->wiphy.coverage_class = 0; 512 513 rdev->wiphy.max_num_csa_counters = 1; 514 515 rdev->wiphy.max_sched_scan_plans = 1; 516 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 517 518 return &rdev->wiphy; 519 } 520 EXPORT_SYMBOL(wiphy_new_nm); 521 522 static int wiphy_verify_combinations(struct wiphy *wiphy) 523 { 524 const struct ieee80211_iface_combination *c; 525 int i, j; 526 527 for (i = 0; i < wiphy->n_iface_combinations; i++) { 528 u32 cnt = 0; 529 u16 all_iftypes = 0; 530 531 c = &wiphy->iface_combinations[i]; 532 533 /* 534 * Combinations with just one interface aren't real, 535 * however we make an exception for DFS. 536 */ 537 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 538 return -EINVAL; 539 540 /* Need at least one channel */ 541 if (WARN_ON(!c->num_different_channels)) 542 return -EINVAL; 543 544 /* 545 * Put a sane limit on maximum number of different 546 * channels to simplify channel accounting code. 547 */ 548 if (WARN_ON(c->num_different_channels > 549 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 550 return -EINVAL; 551 552 /* DFS only works on one channel. */ 553 if (WARN_ON(c->radar_detect_widths && 554 (c->num_different_channels > 1))) 555 return -EINVAL; 556 557 if (WARN_ON(!c->n_limits)) 558 return -EINVAL; 559 560 for (j = 0; j < c->n_limits; j++) { 561 u16 types = c->limits[j].types; 562 563 /* interface types shouldn't overlap */ 564 if (WARN_ON(types & all_iftypes)) 565 return -EINVAL; 566 all_iftypes |= types; 567 568 if (WARN_ON(!c->limits[j].max)) 569 return -EINVAL; 570 571 /* Shouldn't list software iftypes in combinations! */ 572 if (WARN_ON(wiphy->software_iftypes & types)) 573 return -EINVAL; 574 575 /* Only a single P2P_DEVICE can be allowed */ 576 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 577 c->limits[j].max > 1)) 578 return -EINVAL; 579 580 /* Only a single NAN can be allowed */ 581 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 582 c->limits[j].max > 1)) 583 return -EINVAL; 584 585 /* 586 * This isn't well-defined right now. If you have an 587 * IBSS interface, then its beacon interval may change 588 * by joining other networks, and nothing prevents it 589 * from doing that. 590 * So technically we probably shouldn't even allow AP 591 * and IBSS in the same interface, but it seems that 592 * some drivers support that, possibly only with fixed 593 * beacon intervals for IBSS. 594 */ 595 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 596 c->beacon_int_min_gcd)) { 597 return -EINVAL; 598 } 599 600 cnt += c->limits[j].max; 601 /* 602 * Don't advertise an unsupported type 603 * in a combination. 604 */ 605 if (WARN_ON((wiphy->interface_modes & types) != types)) 606 return -EINVAL; 607 } 608 609 #ifndef CONFIG_WIRELESS_WDS 610 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 611 return -EINVAL; 612 #endif 613 614 /* You can't even choose that many! */ 615 if (WARN_ON(cnt < c->max_interfaces)) 616 return -EINVAL; 617 } 618 619 return 0; 620 } 621 622 int wiphy_register(struct wiphy *wiphy) 623 { 624 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 625 int res; 626 enum nl80211_band band; 627 struct ieee80211_supported_band *sband; 628 bool have_band = false; 629 int i; 630 u16 ifmodes = wiphy->interface_modes; 631 632 #ifdef CONFIG_PM 633 if (WARN_ON(wiphy->wowlan && 634 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 635 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 636 return -EINVAL; 637 if (WARN_ON(wiphy->wowlan && 638 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 639 !wiphy->wowlan->tcp)) 640 return -EINVAL; 641 #endif 642 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 643 (!rdev->ops->tdls_channel_switch || 644 !rdev->ops->tdls_cancel_channel_switch))) 645 return -EINVAL; 646 647 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 648 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 649 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 650 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 651 return -EINVAL; 652 653 #ifndef CONFIG_WIRELESS_WDS 654 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 655 return -EINVAL; 656 #endif 657 658 /* 659 * if a wiphy has unsupported modes for regulatory channel enforcement, 660 * opt-out of enforcement checking 661 */ 662 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 663 BIT(NL80211_IFTYPE_P2P_CLIENT) | 664 BIT(NL80211_IFTYPE_AP) | 665 BIT(NL80211_IFTYPE_P2P_GO) | 666 BIT(NL80211_IFTYPE_ADHOC) | 667 BIT(NL80211_IFTYPE_P2P_DEVICE) | 668 BIT(NL80211_IFTYPE_NAN) | 669 BIT(NL80211_IFTYPE_AP_VLAN) | 670 BIT(NL80211_IFTYPE_MONITOR))) 671 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 672 673 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 674 (wiphy->regulatory_flags & 675 (REGULATORY_CUSTOM_REG | 676 REGULATORY_STRICT_REG | 677 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 678 REGULATORY_COUNTRY_IE_IGNORE)))) 679 return -EINVAL; 680 681 if (WARN_ON(wiphy->coalesce && 682 (!wiphy->coalesce->n_rules || 683 !wiphy->coalesce->n_patterns) && 684 (!wiphy->coalesce->pattern_min_len || 685 wiphy->coalesce->pattern_min_len > 686 wiphy->coalesce->pattern_max_len))) 687 return -EINVAL; 688 689 if (WARN_ON(wiphy->ap_sme_capa && 690 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 691 return -EINVAL; 692 693 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 694 return -EINVAL; 695 696 if (WARN_ON(wiphy->addresses && 697 !is_zero_ether_addr(wiphy->perm_addr) && 698 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 699 ETH_ALEN))) 700 return -EINVAL; 701 702 if (WARN_ON(wiphy->max_acl_mac_addrs && 703 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 704 !rdev->ops->set_mac_acl))) 705 return -EINVAL; 706 707 /* assure only valid behaviours are flagged by driver 708 * hence subtract 2 as bit 0 is invalid. 709 */ 710 if (WARN_ON(wiphy->bss_select_support && 711 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 712 return -EINVAL; 713 714 if (wiphy->addresses) 715 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 716 717 /* sanity check ifmodes */ 718 WARN_ON(!ifmodes); 719 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 720 if (WARN_ON(ifmodes != wiphy->interface_modes)) 721 wiphy->interface_modes = ifmodes; 722 723 res = wiphy_verify_combinations(wiphy); 724 if (res) 725 return res; 726 727 /* sanity check supported bands/channels */ 728 for (band = 0; band < NUM_NL80211_BANDS; band++) { 729 sband = wiphy->bands[band]; 730 if (!sband) 731 continue; 732 733 sband->band = band; 734 if (WARN_ON(!sband->n_channels)) 735 return -EINVAL; 736 /* 737 * on 60GHz band, there are no legacy rates, so 738 * n_bitrates is 0 739 */ 740 if (WARN_ON(band != NL80211_BAND_60GHZ && 741 !sband->n_bitrates)) 742 return -EINVAL; 743 744 /* 745 * Since cfg80211_disable_40mhz_24ghz is global, we can 746 * modify the sband's ht data even if the driver uses a 747 * global structure for that. 748 */ 749 if (cfg80211_disable_40mhz_24ghz && 750 band == NL80211_BAND_2GHZ && 751 sband->ht_cap.ht_supported) { 752 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 753 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 754 } 755 756 /* 757 * Since we use a u32 for rate bitmaps in 758 * ieee80211_get_response_rate, we cannot 759 * have more than 32 legacy rates. 760 */ 761 if (WARN_ON(sband->n_bitrates > 32)) 762 return -EINVAL; 763 764 for (i = 0; i < sband->n_channels; i++) { 765 sband->channels[i].orig_flags = 766 sband->channels[i].flags; 767 sband->channels[i].orig_mag = INT_MAX; 768 sband->channels[i].orig_mpwr = 769 sband->channels[i].max_power; 770 sband->channels[i].band = band; 771 } 772 773 have_band = true; 774 } 775 776 if (!have_band) { 777 WARN_ON(1); 778 return -EINVAL; 779 } 780 781 #ifdef CONFIG_PM 782 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 783 (!rdev->wiphy.wowlan->pattern_min_len || 784 rdev->wiphy.wowlan->pattern_min_len > 785 rdev->wiphy.wowlan->pattern_max_len))) 786 return -EINVAL; 787 #endif 788 789 /* check and set up bitrates */ 790 ieee80211_set_bitrate_flags(wiphy); 791 792 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 793 794 rtnl_lock(); 795 res = device_add(&rdev->wiphy.dev); 796 if (res) { 797 rtnl_unlock(); 798 return res; 799 } 800 801 /* set up regulatory info */ 802 wiphy_regulatory_register(wiphy); 803 804 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 805 cfg80211_rdev_list_generation++; 806 807 /* add to debugfs */ 808 rdev->wiphy.debugfsdir = 809 debugfs_create_dir(wiphy_name(&rdev->wiphy), 810 ieee80211_debugfs_dir); 811 if (IS_ERR(rdev->wiphy.debugfsdir)) 812 rdev->wiphy.debugfsdir = NULL; 813 814 cfg80211_debugfs_rdev_add(rdev); 815 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 816 817 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 818 struct regulatory_request request; 819 820 request.wiphy_idx = get_wiphy_idx(wiphy); 821 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 822 request.alpha2[0] = '9'; 823 request.alpha2[1] = '9'; 824 825 nl80211_send_reg_change_event(&request); 826 } 827 828 /* Check that nobody globally advertises any capabilities they do not 829 * advertise on all possible interface types. 830 */ 831 if (wiphy->extended_capabilities_len && 832 wiphy->num_iftype_ext_capab && 833 wiphy->iftype_ext_capab) { 834 u8 supported_on_all, j; 835 const struct wiphy_iftype_ext_capab *capab; 836 837 capab = wiphy->iftype_ext_capab; 838 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 839 if (capab[0].extended_capabilities_len > j) 840 supported_on_all = 841 capab[0].extended_capabilities[j]; 842 else 843 supported_on_all = 0x00; 844 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 845 if (j >= capab[i].extended_capabilities_len) { 846 supported_on_all = 0x00; 847 break; 848 } 849 supported_on_all &= 850 capab[i].extended_capabilities[j]; 851 } 852 if (WARN_ON(wiphy->extended_capabilities[j] & 853 ~supported_on_all)) 854 break; 855 } 856 } 857 858 rdev->wiphy.registered = true; 859 rtnl_unlock(); 860 861 res = rfkill_register(rdev->rfkill); 862 if (res) { 863 rfkill_destroy(rdev->rfkill); 864 rdev->rfkill = NULL; 865 wiphy_unregister(&rdev->wiphy); 866 return res; 867 } 868 869 return 0; 870 } 871 EXPORT_SYMBOL(wiphy_register); 872 873 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 874 { 875 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 876 877 if (!rdev->ops->rfkill_poll) 878 return; 879 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 880 rfkill_resume_polling(rdev->rfkill); 881 } 882 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 883 884 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 885 { 886 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 887 888 rfkill_pause_polling(rdev->rfkill); 889 } 890 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 891 892 void wiphy_unregister(struct wiphy *wiphy) 893 { 894 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 895 896 wait_event(rdev->dev_wait, ({ 897 int __count; 898 rtnl_lock(); 899 __count = rdev->opencount; 900 rtnl_unlock(); 901 __count == 0; })); 902 903 if (rdev->rfkill) 904 rfkill_unregister(rdev->rfkill); 905 906 rtnl_lock(); 907 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 908 rdev->wiphy.registered = false; 909 910 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 911 912 /* 913 * First remove the hardware from everywhere, this makes 914 * it impossible to find from userspace. 915 */ 916 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 917 list_del_rcu(&rdev->list); 918 synchronize_rcu(); 919 920 /* 921 * If this device got a regulatory hint tell core its 922 * free to listen now to a new shiny device regulatory hint 923 */ 924 wiphy_regulatory_deregister(wiphy); 925 926 cfg80211_rdev_list_generation++; 927 device_del(&rdev->wiphy.dev); 928 929 rtnl_unlock(); 930 931 flush_work(&rdev->scan_done_wk); 932 cancel_work_sync(&rdev->conn_work); 933 flush_work(&rdev->event_work); 934 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 935 flush_work(&rdev->destroy_work); 936 flush_work(&rdev->sched_scan_stop_wk); 937 flush_work(&rdev->mlme_unreg_wk); 938 flush_work(&rdev->propagate_radar_detect_wk); 939 flush_work(&rdev->propagate_cac_done_wk); 940 941 #ifdef CONFIG_PM 942 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 943 rdev_set_wakeup(rdev, false); 944 #endif 945 cfg80211_rdev_free_wowlan(rdev); 946 cfg80211_rdev_free_coalesce(rdev); 947 } 948 EXPORT_SYMBOL(wiphy_unregister); 949 950 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 951 { 952 struct cfg80211_internal_bss *scan, *tmp; 953 struct cfg80211_beacon_registration *reg, *treg; 954 rfkill_destroy(rdev->rfkill); 955 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 956 list_del(®->list); 957 kfree(reg); 958 } 959 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 960 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 961 kfree(rdev); 962 } 963 964 void wiphy_free(struct wiphy *wiphy) 965 { 966 put_device(&wiphy->dev); 967 } 968 EXPORT_SYMBOL(wiphy_free); 969 970 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 971 { 972 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 973 974 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 975 schedule_work(&rdev->rfkill_sync); 976 } 977 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 978 979 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 980 { 981 kfree(wdev->cqm_config); 982 wdev->cqm_config = NULL; 983 } 984 985 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 986 { 987 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 988 989 ASSERT_RTNL(); 990 991 if (WARN_ON(wdev->netdev)) 992 return; 993 994 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 995 996 list_del_rcu(&wdev->list); 997 rdev->devlist_generation++; 998 999 switch (wdev->iftype) { 1000 case NL80211_IFTYPE_P2P_DEVICE: 1001 cfg80211_mlme_purge_registrations(wdev); 1002 cfg80211_stop_p2p_device(rdev, wdev); 1003 break; 1004 case NL80211_IFTYPE_NAN: 1005 cfg80211_stop_nan(rdev, wdev); 1006 break; 1007 default: 1008 WARN_ON_ONCE(1); 1009 break; 1010 } 1011 1012 cfg80211_cqm_config_free(wdev); 1013 } 1014 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1015 1016 static const struct device_type wiphy_type = { 1017 .name = "wlan", 1018 }; 1019 1020 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1021 enum nl80211_iftype iftype, int num) 1022 { 1023 ASSERT_RTNL(); 1024 1025 rdev->num_running_ifaces += num; 1026 if (iftype == NL80211_IFTYPE_MONITOR) 1027 rdev->num_running_monitor_ifaces += num; 1028 } 1029 1030 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1031 struct wireless_dev *wdev) 1032 { 1033 struct net_device *dev = wdev->netdev; 1034 struct cfg80211_sched_scan_request *pos, *tmp; 1035 1036 ASSERT_RTNL(); 1037 ASSERT_WDEV_LOCK(wdev); 1038 1039 switch (wdev->iftype) { 1040 case NL80211_IFTYPE_ADHOC: 1041 __cfg80211_leave_ibss(rdev, dev, true); 1042 break; 1043 case NL80211_IFTYPE_P2P_CLIENT: 1044 case NL80211_IFTYPE_STATION: 1045 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1046 list) { 1047 if (dev == pos->dev) 1048 cfg80211_stop_sched_scan_req(rdev, pos, false); 1049 } 1050 1051 #ifdef CONFIG_CFG80211_WEXT 1052 kfree(wdev->wext.ie); 1053 wdev->wext.ie = NULL; 1054 wdev->wext.ie_len = 0; 1055 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1056 #endif 1057 cfg80211_disconnect(rdev, dev, 1058 WLAN_REASON_DEAUTH_LEAVING, true); 1059 break; 1060 case NL80211_IFTYPE_MESH_POINT: 1061 __cfg80211_leave_mesh(rdev, dev); 1062 break; 1063 case NL80211_IFTYPE_AP: 1064 case NL80211_IFTYPE_P2P_GO: 1065 __cfg80211_stop_ap(rdev, dev, true); 1066 break; 1067 case NL80211_IFTYPE_OCB: 1068 __cfg80211_leave_ocb(rdev, dev); 1069 break; 1070 case NL80211_IFTYPE_WDS: 1071 /* must be handled by mac80211/driver, has no APIs */ 1072 break; 1073 case NL80211_IFTYPE_P2P_DEVICE: 1074 case NL80211_IFTYPE_NAN: 1075 /* cannot happen, has no netdev */ 1076 break; 1077 case NL80211_IFTYPE_AP_VLAN: 1078 case NL80211_IFTYPE_MONITOR: 1079 /* nothing to do */ 1080 break; 1081 case NL80211_IFTYPE_UNSPECIFIED: 1082 case NUM_NL80211_IFTYPES: 1083 /* invalid */ 1084 break; 1085 } 1086 } 1087 1088 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1089 struct wireless_dev *wdev) 1090 { 1091 wdev_lock(wdev); 1092 __cfg80211_leave(rdev, wdev); 1093 wdev_unlock(wdev); 1094 } 1095 1096 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1097 gfp_t gfp) 1098 { 1099 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1100 struct cfg80211_event *ev; 1101 unsigned long flags; 1102 1103 trace_cfg80211_stop_iface(wiphy, wdev); 1104 1105 ev = kzalloc(sizeof(*ev), gfp); 1106 if (!ev) 1107 return; 1108 1109 ev->type = EVENT_STOPPED; 1110 1111 spin_lock_irqsave(&wdev->event_lock, flags); 1112 list_add_tail(&ev->list, &wdev->event_list); 1113 spin_unlock_irqrestore(&wdev->event_lock, flags); 1114 queue_work(cfg80211_wq, &rdev->event_work); 1115 } 1116 EXPORT_SYMBOL(cfg80211_stop_iface); 1117 1118 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1119 unsigned long state, void *ptr) 1120 { 1121 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1122 struct wireless_dev *wdev = dev->ieee80211_ptr; 1123 struct cfg80211_registered_device *rdev; 1124 struct cfg80211_sched_scan_request *pos, *tmp; 1125 1126 if (!wdev) 1127 return NOTIFY_DONE; 1128 1129 rdev = wiphy_to_rdev(wdev->wiphy); 1130 1131 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1132 1133 switch (state) { 1134 case NETDEV_POST_INIT: 1135 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1136 break; 1137 case NETDEV_REGISTER: 1138 /* 1139 * NB: cannot take rdev->mtx here because this may be 1140 * called within code protected by it when interfaces 1141 * are added with nl80211. 1142 */ 1143 mutex_init(&wdev->mtx); 1144 INIT_LIST_HEAD(&wdev->event_list); 1145 spin_lock_init(&wdev->event_lock); 1146 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1147 spin_lock_init(&wdev->mgmt_registrations_lock); 1148 1149 /* 1150 * We get here also when the interface changes network namespaces, 1151 * as it's registered into the new one, but we don't want it to 1152 * change ID in that case. Checking if the ID is already assigned 1153 * works, because 0 isn't considered a valid ID and the memory is 1154 * 0-initialized. 1155 */ 1156 if (!wdev->identifier) 1157 wdev->identifier = ++rdev->wdev_id; 1158 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1159 rdev->devlist_generation++; 1160 /* can only change netns with wiphy */ 1161 dev->features |= NETIF_F_NETNS_LOCAL; 1162 1163 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1164 "phy80211")) { 1165 pr_err("failed to add phy80211 symlink to netdev!\n"); 1166 } 1167 wdev->netdev = dev; 1168 #ifdef CONFIG_CFG80211_WEXT 1169 wdev->wext.default_key = -1; 1170 wdev->wext.default_mgmt_key = -1; 1171 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1172 #endif 1173 1174 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1175 wdev->ps = true; 1176 else 1177 wdev->ps = false; 1178 /* allow mac80211 to determine the timeout */ 1179 wdev->ps_timeout = -1; 1180 1181 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1182 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1183 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1184 dev->priv_flags |= IFF_DONT_BRIDGE; 1185 1186 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1187 1188 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1189 break; 1190 case NETDEV_GOING_DOWN: 1191 cfg80211_leave(rdev, wdev); 1192 break; 1193 case NETDEV_DOWN: 1194 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1195 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1196 if (WARN_ON(!rdev->scan_req->notified)) 1197 rdev->scan_req->info.aborted = true; 1198 ___cfg80211_scan_done(rdev, false); 1199 } 1200 1201 list_for_each_entry_safe(pos, tmp, 1202 &rdev->sched_scan_req_list, list) { 1203 if (WARN_ON(pos && pos->dev == wdev->netdev)) 1204 cfg80211_stop_sched_scan_req(rdev, pos, false); 1205 } 1206 1207 rdev->opencount--; 1208 wake_up(&rdev->dev_wait); 1209 break; 1210 case NETDEV_UP: 1211 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1212 wdev_lock(wdev); 1213 switch (wdev->iftype) { 1214 #ifdef CONFIG_CFG80211_WEXT 1215 case NL80211_IFTYPE_ADHOC: 1216 cfg80211_ibss_wext_join(rdev, wdev); 1217 break; 1218 case NL80211_IFTYPE_STATION: 1219 cfg80211_mgd_wext_connect(rdev, wdev); 1220 break; 1221 #endif 1222 #ifdef CONFIG_MAC80211_MESH 1223 case NL80211_IFTYPE_MESH_POINT: 1224 { 1225 /* backward compat code... */ 1226 struct mesh_setup setup; 1227 memcpy(&setup, &default_mesh_setup, 1228 sizeof(setup)); 1229 /* back compat only needed for mesh_id */ 1230 setup.mesh_id = wdev->ssid; 1231 setup.mesh_id_len = wdev->mesh_id_up_len; 1232 if (wdev->mesh_id_up_len) 1233 __cfg80211_join_mesh(rdev, dev, 1234 &setup, 1235 &default_mesh_config); 1236 break; 1237 } 1238 #endif 1239 default: 1240 break; 1241 } 1242 wdev_unlock(wdev); 1243 rdev->opencount++; 1244 1245 /* 1246 * Configure power management to the driver here so that its 1247 * correctly set also after interface type changes etc. 1248 */ 1249 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1250 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1251 rdev->ops->set_power_mgmt && 1252 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1253 wdev->ps_timeout)) { 1254 /* assume this means it's off */ 1255 wdev->ps = false; 1256 } 1257 break; 1258 case NETDEV_UNREGISTER: 1259 /* 1260 * It is possible to get NETDEV_UNREGISTER 1261 * multiple times. To detect that, check 1262 * that the interface is still on the list 1263 * of registered interfaces, and only then 1264 * remove and clean it up. 1265 */ 1266 if (!list_empty(&wdev->list)) { 1267 nl80211_notify_iface(rdev, wdev, 1268 NL80211_CMD_DEL_INTERFACE); 1269 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1270 list_del_rcu(&wdev->list); 1271 rdev->devlist_generation++; 1272 cfg80211_mlme_purge_registrations(wdev); 1273 #ifdef CONFIG_CFG80211_WEXT 1274 kzfree(wdev->wext.keys); 1275 #endif 1276 flush_work(&wdev->disconnect_wk); 1277 cfg80211_cqm_config_free(wdev); 1278 } 1279 /* 1280 * synchronise (so that we won't find this netdev 1281 * from other code any more) and then clear the list 1282 * head so that the above code can safely check for 1283 * !list_empty() to avoid double-cleanup. 1284 */ 1285 synchronize_rcu(); 1286 INIT_LIST_HEAD(&wdev->list); 1287 /* 1288 * Ensure that all events have been processed and 1289 * freed. 1290 */ 1291 cfg80211_process_wdev_events(wdev); 1292 1293 if (WARN_ON(wdev->current_bss)) { 1294 cfg80211_unhold_bss(wdev->current_bss); 1295 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1296 wdev->current_bss = NULL; 1297 } 1298 break; 1299 case NETDEV_PRE_UP: 1300 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 1301 return notifier_from_errno(-EOPNOTSUPP); 1302 if (rfkill_blocked(rdev->rfkill)) 1303 return notifier_from_errno(-ERFKILL); 1304 break; 1305 default: 1306 return NOTIFY_DONE; 1307 } 1308 1309 wireless_nlevent_flush(); 1310 1311 return NOTIFY_OK; 1312 } 1313 1314 static struct notifier_block cfg80211_netdev_notifier = { 1315 .notifier_call = cfg80211_netdev_notifier_call, 1316 }; 1317 1318 static void __net_exit cfg80211_pernet_exit(struct net *net) 1319 { 1320 struct cfg80211_registered_device *rdev; 1321 1322 rtnl_lock(); 1323 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1324 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1325 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1326 } 1327 rtnl_unlock(); 1328 } 1329 1330 static struct pernet_operations cfg80211_pernet_ops = { 1331 .exit = cfg80211_pernet_exit, 1332 }; 1333 1334 static int __init cfg80211_init(void) 1335 { 1336 int err; 1337 1338 err = register_pernet_device(&cfg80211_pernet_ops); 1339 if (err) 1340 goto out_fail_pernet; 1341 1342 err = wiphy_sysfs_init(); 1343 if (err) 1344 goto out_fail_sysfs; 1345 1346 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1347 if (err) 1348 goto out_fail_notifier; 1349 1350 err = nl80211_init(); 1351 if (err) 1352 goto out_fail_nl80211; 1353 1354 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1355 1356 err = regulatory_init(); 1357 if (err) 1358 goto out_fail_reg; 1359 1360 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1361 if (!cfg80211_wq) { 1362 err = -ENOMEM; 1363 goto out_fail_wq; 1364 } 1365 1366 return 0; 1367 1368 out_fail_wq: 1369 regulatory_exit(); 1370 out_fail_reg: 1371 debugfs_remove(ieee80211_debugfs_dir); 1372 nl80211_exit(); 1373 out_fail_nl80211: 1374 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1375 out_fail_notifier: 1376 wiphy_sysfs_exit(); 1377 out_fail_sysfs: 1378 unregister_pernet_device(&cfg80211_pernet_ops); 1379 out_fail_pernet: 1380 return err; 1381 } 1382 subsys_initcall(cfg80211_init); 1383 1384 static void __exit cfg80211_exit(void) 1385 { 1386 debugfs_remove(ieee80211_debugfs_dir); 1387 nl80211_exit(); 1388 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1389 wiphy_sysfs_exit(); 1390 regulatory_exit(); 1391 unregister_pernet_device(&cfg80211_pernet_ops); 1392 destroy_workqueue(cfg80211_wq); 1393 } 1394 module_exit(cfg80211_exit); 1395