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 int rv; 443 444 use_default_name: 445 /* NOTE: This is *probably* safe w/out holding rtnl because of 446 * the restrictions on phy names. Probably this call could 447 * fail if some other part of the kernel (re)named a device 448 * phyX. But, might should add some locking and check return 449 * value, and use a different name if this one exists? 450 */ 451 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 452 if (rv < 0) { 453 kfree(rdev); 454 return NULL; 455 } 456 } 457 458 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 459 INIT_LIST_HEAD(&rdev->beacon_registrations); 460 spin_lock_init(&rdev->beacon_registrations_lock); 461 spin_lock_init(&rdev->bss_lock); 462 INIT_LIST_HEAD(&rdev->bss_list); 463 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 464 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 465 INIT_LIST_HEAD(&rdev->mlme_unreg); 466 spin_lock_init(&rdev->mlme_unreg_lock); 467 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 468 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 469 cfg80211_dfs_channels_update_work); 470 #ifdef CONFIG_CFG80211_WEXT 471 rdev->wiphy.wext = &cfg80211_wext_handler; 472 #endif 473 474 device_initialize(&rdev->wiphy.dev); 475 rdev->wiphy.dev.class = &ieee80211_class; 476 rdev->wiphy.dev.platform_data = rdev; 477 device_enable_async_suspend(&rdev->wiphy.dev); 478 479 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 480 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 481 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 482 INIT_WORK(&rdev->propagate_radar_detect_wk, 483 cfg80211_propagate_radar_detect_wk); 484 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 485 486 #ifdef CONFIG_CFG80211_DEFAULT_PS 487 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 488 #endif 489 490 wiphy_net_set(&rdev->wiphy, &init_net); 491 492 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 493 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 494 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 495 &rdev->rfkill_ops, rdev); 496 497 if (!rdev->rfkill) { 498 kfree(rdev); 499 return NULL; 500 } 501 502 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 503 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 504 INIT_WORK(&rdev->event_work, cfg80211_event_work); 505 506 init_waitqueue_head(&rdev->dev_wait); 507 508 /* 509 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 510 * Fragmentation and RTS threshold are disabled by default with the 511 * special -1 value. 512 */ 513 rdev->wiphy.retry_short = 7; 514 rdev->wiphy.retry_long = 4; 515 rdev->wiphy.frag_threshold = (u32) -1; 516 rdev->wiphy.rts_threshold = (u32) -1; 517 rdev->wiphy.coverage_class = 0; 518 519 rdev->wiphy.max_num_csa_counters = 1; 520 521 rdev->wiphy.max_sched_scan_plans = 1; 522 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 523 524 return &rdev->wiphy; 525 } 526 EXPORT_SYMBOL(wiphy_new_nm); 527 528 static int wiphy_verify_combinations(struct wiphy *wiphy) 529 { 530 const struct ieee80211_iface_combination *c; 531 int i, j; 532 533 for (i = 0; i < wiphy->n_iface_combinations; i++) { 534 u32 cnt = 0; 535 u16 all_iftypes = 0; 536 537 c = &wiphy->iface_combinations[i]; 538 539 /* 540 * Combinations with just one interface aren't real, 541 * however we make an exception for DFS. 542 */ 543 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 544 return -EINVAL; 545 546 /* Need at least one channel */ 547 if (WARN_ON(!c->num_different_channels)) 548 return -EINVAL; 549 550 /* 551 * Put a sane limit on maximum number of different 552 * channels to simplify channel accounting code. 553 */ 554 if (WARN_ON(c->num_different_channels > 555 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 556 return -EINVAL; 557 558 /* DFS only works on one channel. */ 559 if (WARN_ON(c->radar_detect_widths && 560 (c->num_different_channels > 1))) 561 return -EINVAL; 562 563 if (WARN_ON(!c->n_limits)) 564 return -EINVAL; 565 566 for (j = 0; j < c->n_limits; j++) { 567 u16 types = c->limits[j].types; 568 569 /* interface types shouldn't overlap */ 570 if (WARN_ON(types & all_iftypes)) 571 return -EINVAL; 572 all_iftypes |= types; 573 574 if (WARN_ON(!c->limits[j].max)) 575 return -EINVAL; 576 577 /* Shouldn't list software iftypes in combinations! */ 578 if (WARN_ON(wiphy->software_iftypes & types)) 579 return -EINVAL; 580 581 /* Only a single P2P_DEVICE can be allowed */ 582 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 583 c->limits[j].max > 1)) 584 return -EINVAL; 585 586 /* Only a single NAN can be allowed */ 587 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 588 c->limits[j].max > 1)) 589 return -EINVAL; 590 591 /* 592 * This isn't well-defined right now. If you have an 593 * IBSS interface, then its beacon interval may change 594 * by joining other networks, and nothing prevents it 595 * from doing that. 596 * So technically we probably shouldn't even allow AP 597 * and IBSS in the same interface, but it seems that 598 * some drivers support that, possibly only with fixed 599 * beacon intervals for IBSS. 600 */ 601 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 602 c->beacon_int_min_gcd)) { 603 return -EINVAL; 604 } 605 606 cnt += c->limits[j].max; 607 /* 608 * Don't advertise an unsupported type 609 * in a combination. 610 */ 611 if (WARN_ON((wiphy->interface_modes & types) != types)) 612 return -EINVAL; 613 } 614 615 #ifndef CONFIG_WIRELESS_WDS 616 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 617 return -EINVAL; 618 #endif 619 620 /* You can't even choose that many! */ 621 if (WARN_ON(cnt < c->max_interfaces)) 622 return -EINVAL; 623 } 624 625 return 0; 626 } 627 628 int wiphy_register(struct wiphy *wiphy) 629 { 630 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 631 int res; 632 enum nl80211_band band; 633 struct ieee80211_supported_band *sband; 634 bool have_band = false; 635 int i; 636 u16 ifmodes = wiphy->interface_modes; 637 638 #ifdef CONFIG_PM 639 if (WARN_ON(wiphy->wowlan && 640 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 641 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 642 return -EINVAL; 643 if (WARN_ON(wiphy->wowlan && 644 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 645 !wiphy->wowlan->tcp)) 646 return -EINVAL; 647 #endif 648 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 649 (!rdev->ops->tdls_channel_switch || 650 !rdev->ops->tdls_cancel_channel_switch))) 651 return -EINVAL; 652 653 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 654 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 655 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 656 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 657 return -EINVAL; 658 659 #ifndef CONFIG_WIRELESS_WDS 660 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 661 return -EINVAL; 662 #endif 663 664 /* 665 * if a wiphy has unsupported modes for regulatory channel enforcement, 666 * opt-out of enforcement checking 667 */ 668 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 669 BIT(NL80211_IFTYPE_P2P_CLIENT) | 670 BIT(NL80211_IFTYPE_AP) | 671 BIT(NL80211_IFTYPE_P2P_GO) | 672 BIT(NL80211_IFTYPE_ADHOC) | 673 BIT(NL80211_IFTYPE_P2P_DEVICE) | 674 BIT(NL80211_IFTYPE_NAN) | 675 BIT(NL80211_IFTYPE_AP_VLAN) | 676 BIT(NL80211_IFTYPE_MONITOR))) 677 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 678 679 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 680 (wiphy->regulatory_flags & 681 (REGULATORY_CUSTOM_REG | 682 REGULATORY_STRICT_REG | 683 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 684 REGULATORY_COUNTRY_IE_IGNORE)))) 685 return -EINVAL; 686 687 if (WARN_ON(wiphy->coalesce && 688 (!wiphy->coalesce->n_rules || 689 !wiphy->coalesce->n_patterns) && 690 (!wiphy->coalesce->pattern_min_len || 691 wiphy->coalesce->pattern_min_len > 692 wiphy->coalesce->pattern_max_len))) 693 return -EINVAL; 694 695 if (WARN_ON(wiphy->ap_sme_capa && 696 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 697 return -EINVAL; 698 699 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 700 return -EINVAL; 701 702 if (WARN_ON(wiphy->addresses && 703 !is_zero_ether_addr(wiphy->perm_addr) && 704 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 705 ETH_ALEN))) 706 return -EINVAL; 707 708 if (WARN_ON(wiphy->max_acl_mac_addrs && 709 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 710 !rdev->ops->set_mac_acl))) 711 return -EINVAL; 712 713 /* assure only valid behaviours are flagged by driver 714 * hence subtract 2 as bit 0 is invalid. 715 */ 716 if (WARN_ON(wiphy->bss_select_support && 717 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 718 return -EINVAL; 719 720 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 721 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 722 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 723 return -EINVAL; 724 725 if (wiphy->addresses) 726 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 727 728 /* sanity check ifmodes */ 729 WARN_ON(!ifmodes); 730 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 731 if (WARN_ON(ifmodes != wiphy->interface_modes)) 732 wiphy->interface_modes = ifmodes; 733 734 res = wiphy_verify_combinations(wiphy); 735 if (res) 736 return res; 737 738 /* sanity check supported bands/channels */ 739 for (band = 0; band < NUM_NL80211_BANDS; band++) { 740 sband = wiphy->bands[band]; 741 if (!sband) 742 continue; 743 744 sband->band = band; 745 if (WARN_ON(!sband->n_channels)) 746 return -EINVAL; 747 /* 748 * on 60GHz band, there are no legacy rates, so 749 * n_bitrates is 0 750 */ 751 if (WARN_ON(band != NL80211_BAND_60GHZ && 752 !sband->n_bitrates)) 753 return -EINVAL; 754 755 /* 756 * Since cfg80211_disable_40mhz_24ghz is global, we can 757 * modify the sband's ht data even if the driver uses a 758 * global structure for that. 759 */ 760 if (cfg80211_disable_40mhz_24ghz && 761 band == NL80211_BAND_2GHZ && 762 sband->ht_cap.ht_supported) { 763 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 764 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 765 } 766 767 /* 768 * Since we use a u32 for rate bitmaps in 769 * ieee80211_get_response_rate, we cannot 770 * have more than 32 legacy rates. 771 */ 772 if (WARN_ON(sband->n_bitrates > 32)) 773 return -EINVAL; 774 775 for (i = 0; i < sband->n_channels; i++) { 776 sband->channels[i].orig_flags = 777 sband->channels[i].flags; 778 sband->channels[i].orig_mag = INT_MAX; 779 sband->channels[i].orig_mpwr = 780 sband->channels[i].max_power; 781 sband->channels[i].band = band; 782 } 783 784 have_band = true; 785 } 786 787 if (!have_band) { 788 WARN_ON(1); 789 return -EINVAL; 790 } 791 792 #ifdef CONFIG_PM 793 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 794 (!rdev->wiphy.wowlan->pattern_min_len || 795 rdev->wiphy.wowlan->pattern_min_len > 796 rdev->wiphy.wowlan->pattern_max_len))) 797 return -EINVAL; 798 #endif 799 800 /* check and set up bitrates */ 801 ieee80211_set_bitrate_flags(wiphy); 802 803 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 804 805 rtnl_lock(); 806 res = device_add(&rdev->wiphy.dev); 807 if (res) { 808 rtnl_unlock(); 809 return res; 810 } 811 812 /* set up regulatory info */ 813 wiphy_regulatory_register(wiphy); 814 815 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 816 cfg80211_rdev_list_generation++; 817 818 /* add to debugfs */ 819 rdev->wiphy.debugfsdir = 820 debugfs_create_dir(wiphy_name(&rdev->wiphy), 821 ieee80211_debugfs_dir); 822 if (IS_ERR(rdev->wiphy.debugfsdir)) 823 rdev->wiphy.debugfsdir = NULL; 824 825 cfg80211_debugfs_rdev_add(rdev); 826 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 827 828 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 829 struct regulatory_request request; 830 831 request.wiphy_idx = get_wiphy_idx(wiphy); 832 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 833 request.alpha2[0] = '9'; 834 request.alpha2[1] = '9'; 835 836 nl80211_send_reg_change_event(&request); 837 } 838 839 /* Check that nobody globally advertises any capabilities they do not 840 * advertise on all possible interface types. 841 */ 842 if (wiphy->extended_capabilities_len && 843 wiphy->num_iftype_ext_capab && 844 wiphy->iftype_ext_capab) { 845 u8 supported_on_all, j; 846 const struct wiphy_iftype_ext_capab *capab; 847 848 capab = wiphy->iftype_ext_capab; 849 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 850 if (capab[0].extended_capabilities_len > j) 851 supported_on_all = 852 capab[0].extended_capabilities[j]; 853 else 854 supported_on_all = 0x00; 855 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 856 if (j >= capab[i].extended_capabilities_len) { 857 supported_on_all = 0x00; 858 break; 859 } 860 supported_on_all &= 861 capab[i].extended_capabilities[j]; 862 } 863 if (WARN_ON(wiphy->extended_capabilities[j] & 864 ~supported_on_all)) 865 break; 866 } 867 } 868 869 rdev->wiphy.registered = true; 870 rtnl_unlock(); 871 872 res = rfkill_register(rdev->rfkill); 873 if (res) { 874 rfkill_destroy(rdev->rfkill); 875 rdev->rfkill = NULL; 876 wiphy_unregister(&rdev->wiphy); 877 return res; 878 } 879 880 return 0; 881 } 882 EXPORT_SYMBOL(wiphy_register); 883 884 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 885 { 886 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 887 888 if (!rdev->ops->rfkill_poll) 889 return; 890 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 891 rfkill_resume_polling(rdev->rfkill); 892 } 893 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 894 895 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 896 { 897 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 898 899 rfkill_pause_polling(rdev->rfkill); 900 } 901 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 902 903 void wiphy_unregister(struct wiphy *wiphy) 904 { 905 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 906 907 wait_event(rdev->dev_wait, ({ 908 int __count; 909 rtnl_lock(); 910 __count = rdev->opencount; 911 rtnl_unlock(); 912 __count == 0; })); 913 914 if (rdev->rfkill) 915 rfkill_unregister(rdev->rfkill); 916 917 rtnl_lock(); 918 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 919 rdev->wiphy.registered = false; 920 921 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 922 923 /* 924 * First remove the hardware from everywhere, this makes 925 * it impossible to find from userspace. 926 */ 927 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 928 list_del_rcu(&rdev->list); 929 synchronize_rcu(); 930 931 /* 932 * If this device got a regulatory hint tell core its 933 * free to listen now to a new shiny device regulatory hint 934 */ 935 wiphy_regulatory_deregister(wiphy); 936 937 cfg80211_rdev_list_generation++; 938 device_del(&rdev->wiphy.dev); 939 940 rtnl_unlock(); 941 942 flush_work(&rdev->scan_done_wk); 943 cancel_work_sync(&rdev->conn_work); 944 flush_work(&rdev->event_work); 945 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 946 flush_work(&rdev->destroy_work); 947 flush_work(&rdev->sched_scan_stop_wk); 948 flush_work(&rdev->mlme_unreg_wk); 949 flush_work(&rdev->propagate_radar_detect_wk); 950 flush_work(&rdev->propagate_cac_done_wk); 951 952 #ifdef CONFIG_PM 953 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 954 rdev_set_wakeup(rdev, false); 955 #endif 956 cfg80211_rdev_free_wowlan(rdev); 957 cfg80211_rdev_free_coalesce(rdev); 958 } 959 EXPORT_SYMBOL(wiphy_unregister); 960 961 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 962 { 963 struct cfg80211_internal_bss *scan, *tmp; 964 struct cfg80211_beacon_registration *reg, *treg; 965 rfkill_destroy(rdev->rfkill); 966 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 967 list_del(®->list); 968 kfree(reg); 969 } 970 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 971 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 972 kfree(rdev); 973 } 974 975 void wiphy_free(struct wiphy *wiphy) 976 { 977 put_device(&wiphy->dev); 978 } 979 EXPORT_SYMBOL(wiphy_free); 980 981 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 982 { 983 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 984 985 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 986 schedule_work(&rdev->rfkill_sync); 987 } 988 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 989 990 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 991 { 992 kfree(wdev->cqm_config); 993 wdev->cqm_config = NULL; 994 } 995 996 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 997 { 998 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 999 1000 ASSERT_RTNL(); 1001 1002 if (WARN_ON(wdev->netdev)) 1003 return; 1004 1005 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1006 1007 list_del_rcu(&wdev->list); 1008 rdev->devlist_generation++; 1009 1010 switch (wdev->iftype) { 1011 case NL80211_IFTYPE_P2P_DEVICE: 1012 cfg80211_mlme_purge_registrations(wdev); 1013 cfg80211_stop_p2p_device(rdev, wdev); 1014 break; 1015 case NL80211_IFTYPE_NAN: 1016 cfg80211_stop_nan(rdev, wdev); 1017 break; 1018 default: 1019 WARN_ON_ONCE(1); 1020 break; 1021 } 1022 1023 cfg80211_cqm_config_free(wdev); 1024 } 1025 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1026 1027 static const struct device_type wiphy_type = { 1028 .name = "wlan", 1029 }; 1030 1031 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1032 enum nl80211_iftype iftype, int num) 1033 { 1034 ASSERT_RTNL(); 1035 1036 rdev->num_running_ifaces += num; 1037 if (iftype == NL80211_IFTYPE_MONITOR) 1038 rdev->num_running_monitor_ifaces += num; 1039 } 1040 1041 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1042 struct wireless_dev *wdev) 1043 { 1044 struct net_device *dev = wdev->netdev; 1045 struct cfg80211_sched_scan_request *pos, *tmp; 1046 1047 ASSERT_RTNL(); 1048 ASSERT_WDEV_LOCK(wdev); 1049 1050 switch (wdev->iftype) { 1051 case NL80211_IFTYPE_ADHOC: 1052 __cfg80211_leave_ibss(rdev, dev, true); 1053 break; 1054 case NL80211_IFTYPE_P2P_CLIENT: 1055 case NL80211_IFTYPE_STATION: 1056 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1057 list) { 1058 if (dev == pos->dev) 1059 cfg80211_stop_sched_scan_req(rdev, pos, false); 1060 } 1061 1062 #ifdef CONFIG_CFG80211_WEXT 1063 kfree(wdev->wext.ie); 1064 wdev->wext.ie = NULL; 1065 wdev->wext.ie_len = 0; 1066 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1067 #endif 1068 cfg80211_disconnect(rdev, dev, 1069 WLAN_REASON_DEAUTH_LEAVING, true); 1070 break; 1071 case NL80211_IFTYPE_MESH_POINT: 1072 __cfg80211_leave_mesh(rdev, dev); 1073 break; 1074 case NL80211_IFTYPE_AP: 1075 case NL80211_IFTYPE_P2P_GO: 1076 __cfg80211_stop_ap(rdev, dev, true); 1077 break; 1078 case NL80211_IFTYPE_OCB: 1079 __cfg80211_leave_ocb(rdev, dev); 1080 break; 1081 case NL80211_IFTYPE_WDS: 1082 /* must be handled by mac80211/driver, has no APIs */ 1083 break; 1084 case NL80211_IFTYPE_P2P_DEVICE: 1085 case NL80211_IFTYPE_NAN: 1086 /* cannot happen, has no netdev */ 1087 break; 1088 case NL80211_IFTYPE_AP_VLAN: 1089 case NL80211_IFTYPE_MONITOR: 1090 /* nothing to do */ 1091 break; 1092 case NL80211_IFTYPE_UNSPECIFIED: 1093 case NUM_NL80211_IFTYPES: 1094 /* invalid */ 1095 break; 1096 } 1097 } 1098 1099 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1100 struct wireless_dev *wdev) 1101 { 1102 wdev_lock(wdev); 1103 __cfg80211_leave(rdev, wdev); 1104 wdev_unlock(wdev); 1105 } 1106 1107 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1108 gfp_t gfp) 1109 { 1110 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1111 struct cfg80211_event *ev; 1112 unsigned long flags; 1113 1114 trace_cfg80211_stop_iface(wiphy, wdev); 1115 1116 ev = kzalloc(sizeof(*ev), gfp); 1117 if (!ev) 1118 return; 1119 1120 ev->type = EVENT_STOPPED; 1121 1122 spin_lock_irqsave(&wdev->event_lock, flags); 1123 list_add_tail(&ev->list, &wdev->event_list); 1124 spin_unlock_irqrestore(&wdev->event_lock, flags); 1125 queue_work(cfg80211_wq, &rdev->event_work); 1126 } 1127 EXPORT_SYMBOL(cfg80211_stop_iface); 1128 1129 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1130 unsigned long state, void *ptr) 1131 { 1132 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1133 struct wireless_dev *wdev = dev->ieee80211_ptr; 1134 struct cfg80211_registered_device *rdev; 1135 struct cfg80211_sched_scan_request *pos, *tmp; 1136 1137 if (!wdev) 1138 return NOTIFY_DONE; 1139 1140 rdev = wiphy_to_rdev(wdev->wiphy); 1141 1142 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1143 1144 switch (state) { 1145 case NETDEV_POST_INIT: 1146 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1147 break; 1148 case NETDEV_REGISTER: 1149 /* 1150 * NB: cannot take rdev->mtx here because this may be 1151 * called within code protected by it when interfaces 1152 * are added with nl80211. 1153 */ 1154 mutex_init(&wdev->mtx); 1155 INIT_LIST_HEAD(&wdev->event_list); 1156 spin_lock_init(&wdev->event_lock); 1157 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1158 spin_lock_init(&wdev->mgmt_registrations_lock); 1159 1160 /* 1161 * We get here also when the interface changes network namespaces, 1162 * as it's registered into the new one, but we don't want it to 1163 * change ID in that case. Checking if the ID is already assigned 1164 * works, because 0 isn't considered a valid ID and the memory is 1165 * 0-initialized. 1166 */ 1167 if (!wdev->identifier) 1168 wdev->identifier = ++rdev->wdev_id; 1169 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1170 rdev->devlist_generation++; 1171 /* can only change netns with wiphy */ 1172 dev->features |= NETIF_F_NETNS_LOCAL; 1173 1174 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1175 "phy80211")) { 1176 pr_err("failed to add phy80211 symlink to netdev!\n"); 1177 } 1178 wdev->netdev = dev; 1179 #ifdef CONFIG_CFG80211_WEXT 1180 wdev->wext.default_key = -1; 1181 wdev->wext.default_mgmt_key = -1; 1182 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1183 #endif 1184 1185 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1186 wdev->ps = true; 1187 else 1188 wdev->ps = false; 1189 /* allow mac80211 to determine the timeout */ 1190 wdev->ps_timeout = -1; 1191 1192 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1193 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1194 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1195 dev->priv_flags |= IFF_DONT_BRIDGE; 1196 1197 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1198 1199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1200 break; 1201 case NETDEV_GOING_DOWN: 1202 cfg80211_leave(rdev, wdev); 1203 break; 1204 case NETDEV_DOWN: 1205 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1207 if (WARN_ON(!rdev->scan_req->notified)) 1208 rdev->scan_req->info.aborted = true; 1209 ___cfg80211_scan_done(rdev, false); 1210 } 1211 1212 list_for_each_entry_safe(pos, tmp, 1213 &rdev->sched_scan_req_list, list) { 1214 if (WARN_ON(pos && pos->dev == wdev->netdev)) 1215 cfg80211_stop_sched_scan_req(rdev, pos, false); 1216 } 1217 1218 rdev->opencount--; 1219 wake_up(&rdev->dev_wait); 1220 break; 1221 case NETDEV_UP: 1222 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1223 wdev_lock(wdev); 1224 switch (wdev->iftype) { 1225 #ifdef CONFIG_CFG80211_WEXT 1226 case NL80211_IFTYPE_ADHOC: 1227 cfg80211_ibss_wext_join(rdev, wdev); 1228 break; 1229 case NL80211_IFTYPE_STATION: 1230 cfg80211_mgd_wext_connect(rdev, wdev); 1231 break; 1232 #endif 1233 #ifdef CONFIG_MAC80211_MESH 1234 case NL80211_IFTYPE_MESH_POINT: 1235 { 1236 /* backward compat code... */ 1237 struct mesh_setup setup; 1238 memcpy(&setup, &default_mesh_setup, 1239 sizeof(setup)); 1240 /* back compat only needed for mesh_id */ 1241 setup.mesh_id = wdev->ssid; 1242 setup.mesh_id_len = wdev->mesh_id_up_len; 1243 if (wdev->mesh_id_up_len) 1244 __cfg80211_join_mesh(rdev, dev, 1245 &setup, 1246 &default_mesh_config); 1247 break; 1248 } 1249 #endif 1250 default: 1251 break; 1252 } 1253 wdev_unlock(wdev); 1254 rdev->opencount++; 1255 1256 /* 1257 * Configure power management to the driver here so that its 1258 * correctly set also after interface type changes etc. 1259 */ 1260 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1261 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1262 rdev->ops->set_power_mgmt && 1263 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1264 wdev->ps_timeout)) { 1265 /* assume this means it's off */ 1266 wdev->ps = false; 1267 } 1268 break; 1269 case NETDEV_UNREGISTER: 1270 /* 1271 * It is possible to get NETDEV_UNREGISTER 1272 * multiple times. To detect that, check 1273 * that the interface is still on the list 1274 * of registered interfaces, and only then 1275 * remove and clean it up. 1276 */ 1277 if (!list_empty(&wdev->list)) { 1278 nl80211_notify_iface(rdev, wdev, 1279 NL80211_CMD_DEL_INTERFACE); 1280 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1281 list_del_rcu(&wdev->list); 1282 rdev->devlist_generation++; 1283 cfg80211_mlme_purge_registrations(wdev); 1284 #ifdef CONFIG_CFG80211_WEXT 1285 kzfree(wdev->wext.keys); 1286 #endif 1287 flush_work(&wdev->disconnect_wk); 1288 cfg80211_cqm_config_free(wdev); 1289 } 1290 /* 1291 * synchronise (so that we won't find this netdev 1292 * from other code any more) and then clear the list 1293 * head so that the above code can safely check for 1294 * !list_empty() to avoid double-cleanup. 1295 */ 1296 synchronize_rcu(); 1297 INIT_LIST_HEAD(&wdev->list); 1298 /* 1299 * Ensure that all events have been processed and 1300 * freed. 1301 */ 1302 cfg80211_process_wdev_events(wdev); 1303 1304 if (WARN_ON(wdev->current_bss)) { 1305 cfg80211_unhold_bss(wdev->current_bss); 1306 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1307 wdev->current_bss = NULL; 1308 } 1309 break; 1310 case NETDEV_PRE_UP: 1311 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 1312 return notifier_from_errno(-EOPNOTSUPP); 1313 if (rfkill_blocked(rdev->rfkill)) 1314 return notifier_from_errno(-ERFKILL); 1315 break; 1316 default: 1317 return NOTIFY_DONE; 1318 } 1319 1320 wireless_nlevent_flush(); 1321 1322 return NOTIFY_OK; 1323 } 1324 1325 static struct notifier_block cfg80211_netdev_notifier = { 1326 .notifier_call = cfg80211_netdev_notifier_call, 1327 }; 1328 1329 static void __net_exit cfg80211_pernet_exit(struct net *net) 1330 { 1331 struct cfg80211_registered_device *rdev; 1332 1333 rtnl_lock(); 1334 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1335 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1336 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1337 } 1338 rtnl_unlock(); 1339 } 1340 1341 static struct pernet_operations cfg80211_pernet_ops = { 1342 .exit = cfg80211_pernet_exit, 1343 }; 1344 1345 static int __init cfg80211_init(void) 1346 { 1347 int err; 1348 1349 err = register_pernet_device(&cfg80211_pernet_ops); 1350 if (err) 1351 goto out_fail_pernet; 1352 1353 err = wiphy_sysfs_init(); 1354 if (err) 1355 goto out_fail_sysfs; 1356 1357 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1358 if (err) 1359 goto out_fail_notifier; 1360 1361 err = nl80211_init(); 1362 if (err) 1363 goto out_fail_nl80211; 1364 1365 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1366 1367 err = regulatory_init(); 1368 if (err) 1369 goto out_fail_reg; 1370 1371 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1372 if (!cfg80211_wq) { 1373 err = -ENOMEM; 1374 goto out_fail_wq; 1375 } 1376 1377 return 0; 1378 1379 out_fail_wq: 1380 regulatory_exit(); 1381 out_fail_reg: 1382 debugfs_remove(ieee80211_debugfs_dir); 1383 nl80211_exit(); 1384 out_fail_nl80211: 1385 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1386 out_fail_notifier: 1387 wiphy_sysfs_exit(); 1388 out_fail_sysfs: 1389 unregister_pernet_device(&cfg80211_pernet_ops); 1390 out_fail_pernet: 1391 return err; 1392 } 1393 fs_initcall(cfg80211_init); 1394 1395 static void __exit cfg80211_exit(void) 1396 { 1397 debugfs_remove(ieee80211_debugfs_dir); 1398 nl80211_exit(); 1399 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1400 wiphy_sysfs_exit(); 1401 regulatory_exit(); 1402 unregister_pernet_device(&cfg80211_pernet_ops); 1403 destroy_workqueue(cfg80211_wq); 1404 } 1405 module_exit(cfg80211_exit); 1406