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 2015-2017 Intel Deutschland GmbH 7 * Copyright (C) 2018 Intel Corporation 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/if.h> 13 #include <linux/module.h> 14 #include <linux/err.h> 15 #include <linux/list.h> 16 #include <linux/slab.h> 17 #include <linux/nl80211.h> 18 #include <linux/debugfs.h> 19 #include <linux/notifier.h> 20 #include <linux/device.h> 21 #include <linux/etherdevice.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/sched.h> 24 #include <net/genetlink.h> 25 #include <net/cfg80211.h> 26 #include "nl80211.h" 27 #include "core.h" 28 #include "sysfs.h" 29 #include "debugfs.h" 30 #include "wext-compat.h" 31 #include "rdev-ops.h" 32 33 /* name for sysfs, %d is appended */ 34 #define PHY_NAME "phy" 35 36 MODULE_AUTHOR("Johannes Berg"); 37 MODULE_LICENSE("GPL"); 38 MODULE_DESCRIPTION("wireless configuration support"); 39 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 40 41 /* RCU-protected (and RTNL for writers) */ 42 LIST_HEAD(cfg80211_rdev_list); 43 int cfg80211_rdev_list_generation; 44 45 /* for debugfs */ 46 static struct dentry *ieee80211_debugfs_dir; 47 48 /* for the cleanup, scan and event works */ 49 struct workqueue_struct *cfg80211_wq; 50 51 static bool cfg80211_disable_40mhz_24ghz; 52 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 53 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 54 "Disable 40MHz support in the 2.4GHz band"); 55 56 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 57 { 58 struct cfg80211_registered_device *result = NULL, *rdev; 59 60 ASSERT_RTNL(); 61 62 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 63 if (rdev->wiphy_idx == wiphy_idx) { 64 result = rdev; 65 break; 66 } 67 } 68 69 return result; 70 } 71 72 int get_wiphy_idx(struct wiphy *wiphy) 73 { 74 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 75 76 return rdev->wiphy_idx; 77 } 78 79 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 80 { 81 struct cfg80211_registered_device *rdev; 82 83 ASSERT_RTNL(); 84 85 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 86 if (!rdev) 87 return NULL; 88 return &rdev->wiphy; 89 } 90 91 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 92 const char *newname) 93 { 94 struct cfg80211_registered_device *rdev2; 95 int wiphy_idx, taken = -1, digits; 96 97 ASSERT_RTNL(); 98 99 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) 100 return -EINVAL; 101 102 /* prohibit calling the thing phy%d when %d is not its number */ 103 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 104 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 105 /* count number of places needed to print wiphy_idx */ 106 digits = 1; 107 while (wiphy_idx /= 10) 108 digits++; 109 /* 110 * deny the name if it is phy<idx> where <idx> is printed 111 * without leading zeroes. taken == strlen(newname) here 112 */ 113 if (taken == strlen(PHY_NAME) + digits) 114 return -EINVAL; 115 } 116 117 /* Ensure another device does not already have this name. */ 118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list) 119 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 120 return -EINVAL; 121 122 return 0; 123 } 124 125 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 126 char *newname) 127 { 128 int result; 129 130 ASSERT_RTNL(); 131 132 /* Ignore nop renames */ 133 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 134 return 0; 135 136 result = cfg80211_dev_check_name(rdev, newname); 137 if (result < 0) 138 return result; 139 140 result = device_rename(&rdev->wiphy.dev, newname); 141 if (result) 142 return result; 143 144 if (rdev->wiphy.debugfsdir && 145 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, 146 rdev->wiphy.debugfsdir, 147 rdev->wiphy.debugfsdir->d_parent, 148 newname)) 149 pr_err("failed to rename debugfs dir to %s!\n", newname); 150 151 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 152 153 return 0; 154 } 155 156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 157 struct net *net) 158 { 159 struct wireless_dev *wdev; 160 int err = 0; 161 162 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 163 return -EOPNOTSUPP; 164 165 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 166 if (!wdev->netdev) 167 continue; 168 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 170 if (err) 171 break; 172 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 173 } 174 175 if (err) { 176 /* failed -- clean up to old netns */ 177 net = wiphy_net(&rdev->wiphy); 178 179 list_for_each_entry_continue_reverse(wdev, 180 &rdev->wiphy.wdev_list, 181 list) { 182 if (!wdev->netdev) 183 continue; 184 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 185 err = dev_change_net_namespace(wdev->netdev, net, 186 "wlan%d"); 187 WARN_ON(err); 188 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 189 } 190 191 return err; 192 } 193 194 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 195 if (!wdev->netdev) 196 continue; 197 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 198 } 199 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 200 201 wiphy_net_set(&rdev->wiphy, net); 202 203 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 204 WARN_ON(err); 205 206 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 207 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 208 if (!wdev->netdev) 209 continue; 210 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 211 } 212 213 return 0; 214 } 215 216 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 217 { 218 struct cfg80211_registered_device *rdev = data; 219 220 rdev_rfkill_poll(rdev); 221 } 222 223 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 224 struct wireless_dev *wdev) 225 { 226 ASSERT_RTNL(); 227 228 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 229 return; 230 231 if (!wdev_running(wdev)) 232 return; 233 234 rdev_stop_p2p_device(rdev, wdev); 235 wdev->is_running = false; 236 237 rdev->opencount--; 238 239 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 240 if (WARN_ON(!rdev->scan_req->notified)) 241 rdev->scan_req->info.aborted = true; 242 ___cfg80211_scan_done(rdev, false); 243 } 244 } 245 246 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 247 struct wireless_dev *wdev) 248 { 249 ASSERT_RTNL(); 250 251 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 252 return; 253 254 if (!wdev_running(wdev)) 255 return; 256 257 rdev_stop_nan(rdev, wdev); 258 wdev->is_running = false; 259 260 rdev->opencount--; 261 } 262 263 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 264 { 265 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 266 struct wireless_dev *wdev; 267 268 ASSERT_RTNL(); 269 270 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 271 if (wdev->netdev) { 272 dev_close(wdev->netdev); 273 continue; 274 } 275 /* otherwise, check iftype */ 276 switch (wdev->iftype) { 277 case NL80211_IFTYPE_P2P_DEVICE: 278 cfg80211_stop_p2p_device(rdev, wdev); 279 break; 280 case NL80211_IFTYPE_NAN: 281 cfg80211_stop_nan(rdev, wdev); 282 break; 283 default: 284 break; 285 } 286 } 287 } 288 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 289 290 static int cfg80211_rfkill_set_block(void *data, bool blocked) 291 { 292 struct cfg80211_registered_device *rdev = data; 293 294 if (!blocked) 295 return 0; 296 297 rtnl_lock(); 298 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 299 rtnl_unlock(); 300 301 return 0; 302 } 303 304 static void cfg80211_rfkill_sync_work(struct work_struct *work) 305 { 306 struct cfg80211_registered_device *rdev; 307 308 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); 309 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); 310 } 311 312 static void cfg80211_event_work(struct work_struct *work) 313 { 314 struct cfg80211_registered_device *rdev; 315 316 rdev = container_of(work, struct cfg80211_registered_device, 317 event_work); 318 319 rtnl_lock(); 320 cfg80211_process_rdev_events(rdev); 321 rtnl_unlock(); 322 } 323 324 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 325 { 326 struct wireless_dev *wdev, *tmp; 327 328 ASSERT_RTNL(); 329 330 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 331 if (wdev->nl_owner_dead) 332 rdev_del_virtual_intf(rdev, wdev); 333 } 334 } 335 336 static void cfg80211_destroy_iface_wk(struct work_struct *work) 337 { 338 struct cfg80211_registered_device *rdev; 339 340 rdev = container_of(work, struct cfg80211_registered_device, 341 destroy_work); 342 343 rtnl_lock(); 344 cfg80211_destroy_ifaces(rdev); 345 rtnl_unlock(); 346 } 347 348 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 349 { 350 struct cfg80211_registered_device *rdev; 351 struct cfg80211_sched_scan_request *req, *tmp; 352 353 rdev = container_of(work, struct cfg80211_registered_device, 354 sched_scan_stop_wk); 355 356 rtnl_lock(); 357 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 358 if (req->nl_owner_dead) 359 cfg80211_stop_sched_scan_req(rdev, req, false); 360 } 361 rtnl_unlock(); 362 } 363 364 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 365 { 366 struct cfg80211_registered_device *rdev; 367 368 rdev = container_of(work, struct cfg80211_registered_device, 369 propagate_radar_detect_wk); 370 371 rtnl_lock(); 372 373 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 374 NL80211_DFS_UNAVAILABLE, 375 NL80211_RADAR_DETECTED); 376 377 rtnl_unlock(); 378 } 379 380 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 381 { 382 struct cfg80211_registered_device *rdev; 383 384 rdev = container_of(work, struct cfg80211_registered_device, 385 propagate_cac_done_wk); 386 387 rtnl_lock(); 388 389 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 390 NL80211_DFS_AVAILABLE, 391 NL80211_RADAR_CAC_FINISHED); 392 393 rtnl_unlock(); 394 } 395 396 /* exported functions */ 397 398 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 399 const char *requested_name) 400 { 401 static atomic_t wiphy_counter = ATOMIC_INIT(0); 402 403 struct cfg80211_registered_device *rdev; 404 int alloc_size; 405 406 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 407 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 408 WARN_ON(ops->connect && !ops->disconnect); 409 WARN_ON(ops->join_ibss && !ops->leave_ibss); 410 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 411 WARN_ON(ops->add_station && !ops->del_station); 412 WARN_ON(ops->add_mpath && !ops->del_mpath); 413 WARN_ON(ops->join_mesh && !ops->leave_mesh); 414 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 415 WARN_ON(ops->start_ap && !ops->stop_ap); 416 WARN_ON(ops->join_ocb && !ops->leave_ocb); 417 WARN_ON(ops->suspend && !ops->resume); 418 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 419 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 420 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 421 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 422 423 alloc_size = sizeof(*rdev) + sizeof_priv; 424 425 rdev = kzalloc(alloc_size, GFP_KERNEL); 426 if (!rdev) 427 return NULL; 428 429 rdev->ops = ops; 430 431 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 432 433 if (unlikely(rdev->wiphy_idx < 0)) { 434 /* ugh, wrapped! */ 435 atomic_dec(&wiphy_counter); 436 kfree(rdev); 437 return NULL; 438 } 439 440 /* atomic_inc_return makes it start at 1, make it start at 0 */ 441 rdev->wiphy_idx--; 442 443 /* give it a proper name */ 444 if (requested_name && requested_name[0]) { 445 int rv; 446 447 rtnl_lock(); 448 rv = cfg80211_dev_check_name(rdev, requested_name); 449 450 if (rv < 0) { 451 rtnl_unlock(); 452 goto use_default_name; 453 } 454 455 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 456 rtnl_unlock(); 457 if (rv) 458 goto use_default_name; 459 } else { 460 int rv; 461 462 use_default_name: 463 /* NOTE: This is *probably* safe w/out holding rtnl because of 464 * the restrictions on phy names. Probably this call could 465 * fail if some other part of the kernel (re)named a device 466 * phyX. But, might should add some locking and check return 467 * value, and use a different name if this one exists? 468 */ 469 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 470 if (rv < 0) { 471 kfree(rdev); 472 return NULL; 473 } 474 } 475 476 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 477 INIT_LIST_HEAD(&rdev->beacon_registrations); 478 spin_lock_init(&rdev->beacon_registrations_lock); 479 spin_lock_init(&rdev->bss_lock); 480 INIT_LIST_HEAD(&rdev->bss_list); 481 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 482 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 483 INIT_LIST_HEAD(&rdev->mlme_unreg); 484 spin_lock_init(&rdev->mlme_unreg_lock); 485 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 486 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 487 cfg80211_dfs_channels_update_work); 488 #ifdef CONFIG_CFG80211_WEXT 489 rdev->wiphy.wext = &cfg80211_wext_handler; 490 #endif 491 492 device_initialize(&rdev->wiphy.dev); 493 rdev->wiphy.dev.class = &ieee80211_class; 494 rdev->wiphy.dev.platform_data = rdev; 495 device_enable_async_suspend(&rdev->wiphy.dev); 496 497 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 498 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 499 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 500 INIT_WORK(&rdev->propagate_radar_detect_wk, 501 cfg80211_propagate_radar_detect_wk); 502 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 503 504 #ifdef CONFIG_CFG80211_DEFAULT_PS 505 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 506 #endif 507 508 wiphy_net_set(&rdev->wiphy, &init_net); 509 510 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 511 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 512 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 513 &rdev->rfkill_ops, rdev); 514 515 if (!rdev->rfkill) { 516 kfree(rdev); 517 return NULL; 518 } 519 520 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 521 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 522 INIT_WORK(&rdev->event_work, cfg80211_event_work); 523 524 init_waitqueue_head(&rdev->dev_wait); 525 526 /* 527 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 528 * Fragmentation and RTS threshold are disabled by default with the 529 * special -1 value. 530 */ 531 rdev->wiphy.retry_short = 7; 532 rdev->wiphy.retry_long = 4; 533 rdev->wiphy.frag_threshold = (u32) -1; 534 rdev->wiphy.rts_threshold = (u32) -1; 535 rdev->wiphy.coverage_class = 0; 536 537 rdev->wiphy.max_num_csa_counters = 1; 538 539 rdev->wiphy.max_sched_scan_plans = 1; 540 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 541 542 return &rdev->wiphy; 543 } 544 EXPORT_SYMBOL(wiphy_new_nm); 545 546 static int wiphy_verify_combinations(struct wiphy *wiphy) 547 { 548 const struct ieee80211_iface_combination *c; 549 int i, j; 550 551 for (i = 0; i < wiphy->n_iface_combinations; i++) { 552 u32 cnt = 0; 553 u16 all_iftypes = 0; 554 555 c = &wiphy->iface_combinations[i]; 556 557 /* 558 * Combinations with just one interface aren't real, 559 * however we make an exception for DFS. 560 */ 561 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 562 return -EINVAL; 563 564 /* Need at least one channel */ 565 if (WARN_ON(!c->num_different_channels)) 566 return -EINVAL; 567 568 /* 569 * Put a sane limit on maximum number of different 570 * channels to simplify channel accounting code. 571 */ 572 if (WARN_ON(c->num_different_channels > 573 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 574 return -EINVAL; 575 576 /* DFS only works on one channel. */ 577 if (WARN_ON(c->radar_detect_widths && 578 (c->num_different_channels > 1))) 579 return -EINVAL; 580 581 if (WARN_ON(!c->n_limits)) 582 return -EINVAL; 583 584 for (j = 0; j < c->n_limits; j++) { 585 u16 types = c->limits[j].types; 586 587 /* interface types shouldn't overlap */ 588 if (WARN_ON(types & all_iftypes)) 589 return -EINVAL; 590 all_iftypes |= types; 591 592 if (WARN_ON(!c->limits[j].max)) 593 return -EINVAL; 594 595 /* Shouldn't list software iftypes in combinations! */ 596 if (WARN_ON(wiphy->software_iftypes & types)) 597 return -EINVAL; 598 599 /* Only a single P2P_DEVICE can be allowed */ 600 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 601 c->limits[j].max > 1)) 602 return -EINVAL; 603 604 /* Only a single NAN can be allowed */ 605 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 606 c->limits[j].max > 1)) 607 return -EINVAL; 608 609 /* 610 * This isn't well-defined right now. If you have an 611 * IBSS interface, then its beacon interval may change 612 * by joining other networks, and nothing prevents it 613 * from doing that. 614 * So technically we probably shouldn't even allow AP 615 * and IBSS in the same interface, but it seems that 616 * some drivers support that, possibly only with fixed 617 * beacon intervals for IBSS. 618 */ 619 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 620 c->beacon_int_min_gcd)) { 621 return -EINVAL; 622 } 623 624 cnt += c->limits[j].max; 625 /* 626 * Don't advertise an unsupported type 627 * in a combination. 628 */ 629 if (WARN_ON((wiphy->interface_modes & types) != types)) 630 return -EINVAL; 631 } 632 633 #ifndef CONFIG_WIRELESS_WDS 634 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 635 return -EINVAL; 636 #endif 637 638 /* You can't even choose that many! */ 639 if (WARN_ON(cnt < c->max_interfaces)) 640 return -EINVAL; 641 } 642 643 return 0; 644 } 645 646 int wiphy_register(struct wiphy *wiphy) 647 { 648 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 649 int res; 650 enum nl80211_band band; 651 struct ieee80211_supported_band *sband; 652 bool have_band = false; 653 int i; 654 u16 ifmodes = wiphy->interface_modes; 655 656 #ifdef CONFIG_PM 657 if (WARN_ON(wiphy->wowlan && 658 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 659 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 660 return -EINVAL; 661 if (WARN_ON(wiphy->wowlan && 662 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 663 !wiphy->wowlan->tcp)) 664 return -EINVAL; 665 #endif 666 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 667 (!rdev->ops->tdls_channel_switch || 668 !rdev->ops->tdls_cancel_channel_switch))) 669 return -EINVAL; 670 671 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 672 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 673 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 674 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 675 return -EINVAL; 676 677 #ifndef CONFIG_WIRELESS_WDS 678 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 679 return -EINVAL; 680 #endif 681 682 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 683 return -EINVAL; 684 685 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 686 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 687 !wiphy->pmsr_capa->ftm.non_asap)) 688 return -EINVAL; 689 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 690 !wiphy->pmsr_capa->ftm.bandwidths)) 691 return -EINVAL; 692 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 693 ~(BIT(NL80211_PREAMBLE_LEGACY) | 694 BIT(NL80211_PREAMBLE_HT) | 695 BIT(NL80211_PREAMBLE_VHT) | 696 BIT(NL80211_PREAMBLE_DMG)))) 697 return -EINVAL; 698 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 699 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 700 BIT(NL80211_CHAN_WIDTH_20) | 701 BIT(NL80211_CHAN_WIDTH_40) | 702 BIT(NL80211_CHAN_WIDTH_80) | 703 BIT(NL80211_CHAN_WIDTH_80P80) | 704 BIT(NL80211_CHAN_WIDTH_160) | 705 BIT(NL80211_CHAN_WIDTH_5) | 706 BIT(NL80211_CHAN_WIDTH_10)))) 707 return -EINVAL; 708 } 709 710 /* 711 * if a wiphy has unsupported modes for regulatory channel enforcement, 712 * opt-out of enforcement checking 713 */ 714 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 715 BIT(NL80211_IFTYPE_P2P_CLIENT) | 716 BIT(NL80211_IFTYPE_AP) | 717 BIT(NL80211_IFTYPE_P2P_GO) | 718 BIT(NL80211_IFTYPE_ADHOC) | 719 BIT(NL80211_IFTYPE_P2P_DEVICE) | 720 BIT(NL80211_IFTYPE_NAN) | 721 BIT(NL80211_IFTYPE_AP_VLAN) | 722 BIT(NL80211_IFTYPE_MONITOR))) 723 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 724 725 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 726 (wiphy->regulatory_flags & 727 (REGULATORY_CUSTOM_REG | 728 REGULATORY_STRICT_REG | 729 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 730 REGULATORY_COUNTRY_IE_IGNORE)))) 731 return -EINVAL; 732 733 if (WARN_ON(wiphy->coalesce && 734 (!wiphy->coalesce->n_rules || 735 !wiphy->coalesce->n_patterns) && 736 (!wiphy->coalesce->pattern_min_len || 737 wiphy->coalesce->pattern_min_len > 738 wiphy->coalesce->pattern_max_len))) 739 return -EINVAL; 740 741 if (WARN_ON(wiphy->ap_sme_capa && 742 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 743 return -EINVAL; 744 745 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 746 return -EINVAL; 747 748 if (WARN_ON(wiphy->addresses && 749 !is_zero_ether_addr(wiphy->perm_addr) && 750 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 751 ETH_ALEN))) 752 return -EINVAL; 753 754 if (WARN_ON(wiphy->max_acl_mac_addrs && 755 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 756 !rdev->ops->set_mac_acl))) 757 return -EINVAL; 758 759 /* assure only valid behaviours are flagged by driver 760 * hence subtract 2 as bit 0 is invalid. 761 */ 762 if (WARN_ON(wiphy->bss_select_support && 763 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 764 return -EINVAL; 765 766 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 767 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 768 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 769 return -EINVAL; 770 771 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 772 rdev->ops->update_connect_params)) 773 return -EINVAL; 774 775 if (wiphy->addresses) 776 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 777 778 /* sanity check ifmodes */ 779 WARN_ON(!ifmodes); 780 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 781 if (WARN_ON(ifmodes != wiphy->interface_modes)) 782 wiphy->interface_modes = ifmodes; 783 784 res = wiphy_verify_combinations(wiphy); 785 if (res) 786 return res; 787 788 /* sanity check supported bands/channels */ 789 for (band = 0; band < NUM_NL80211_BANDS; band++) { 790 u16 types = 0; 791 792 sband = wiphy->bands[band]; 793 if (!sband) 794 continue; 795 796 sband->band = band; 797 if (WARN_ON(!sband->n_channels)) 798 return -EINVAL; 799 /* 800 * on 60GHz band, there are no legacy rates, so 801 * n_bitrates is 0 802 */ 803 if (WARN_ON(band != NL80211_BAND_60GHZ && 804 !sband->n_bitrates)) 805 return -EINVAL; 806 807 /* 808 * Since cfg80211_disable_40mhz_24ghz is global, we can 809 * modify the sband's ht data even if the driver uses a 810 * global structure for that. 811 */ 812 if (cfg80211_disable_40mhz_24ghz && 813 band == NL80211_BAND_2GHZ && 814 sband->ht_cap.ht_supported) { 815 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 816 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 817 } 818 819 /* 820 * Since we use a u32 for rate bitmaps in 821 * ieee80211_get_response_rate, we cannot 822 * have more than 32 legacy rates. 823 */ 824 if (WARN_ON(sband->n_bitrates > 32)) 825 return -EINVAL; 826 827 for (i = 0; i < sband->n_channels; i++) { 828 sband->channels[i].orig_flags = 829 sband->channels[i].flags; 830 sband->channels[i].orig_mag = INT_MAX; 831 sband->channels[i].orig_mpwr = 832 sband->channels[i].max_power; 833 sband->channels[i].band = band; 834 } 835 836 for (i = 0; i < sband->n_iftype_data; i++) { 837 const struct ieee80211_sband_iftype_data *iftd; 838 839 iftd = &sband->iftype_data[i]; 840 841 if (WARN_ON(!iftd->types_mask)) 842 return -EINVAL; 843 if (WARN_ON(types & iftd->types_mask)) 844 return -EINVAL; 845 846 /* at least one piece of information must be present */ 847 if (WARN_ON(!iftd->he_cap.has_he)) 848 return -EINVAL; 849 850 types |= iftd->types_mask; 851 } 852 853 have_band = true; 854 } 855 856 if (!have_band) { 857 WARN_ON(1); 858 return -EINVAL; 859 } 860 861 #ifdef CONFIG_PM 862 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 863 (!rdev->wiphy.wowlan->pattern_min_len || 864 rdev->wiphy.wowlan->pattern_min_len > 865 rdev->wiphy.wowlan->pattern_max_len))) 866 return -EINVAL; 867 #endif 868 869 /* check and set up bitrates */ 870 ieee80211_set_bitrate_flags(wiphy); 871 872 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 873 874 rtnl_lock(); 875 res = device_add(&rdev->wiphy.dev); 876 if (res) { 877 rtnl_unlock(); 878 return res; 879 } 880 881 /* set up regulatory info */ 882 wiphy_regulatory_register(wiphy); 883 884 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 885 cfg80211_rdev_list_generation++; 886 887 /* add to debugfs */ 888 rdev->wiphy.debugfsdir = 889 debugfs_create_dir(wiphy_name(&rdev->wiphy), 890 ieee80211_debugfs_dir); 891 if (IS_ERR(rdev->wiphy.debugfsdir)) 892 rdev->wiphy.debugfsdir = NULL; 893 894 cfg80211_debugfs_rdev_add(rdev); 895 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 896 897 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 898 struct regulatory_request request; 899 900 request.wiphy_idx = get_wiphy_idx(wiphy); 901 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 902 request.alpha2[0] = '9'; 903 request.alpha2[1] = '9'; 904 905 nl80211_send_reg_change_event(&request); 906 } 907 908 /* Check that nobody globally advertises any capabilities they do not 909 * advertise on all possible interface types. 910 */ 911 if (wiphy->extended_capabilities_len && 912 wiphy->num_iftype_ext_capab && 913 wiphy->iftype_ext_capab) { 914 u8 supported_on_all, j; 915 const struct wiphy_iftype_ext_capab *capab; 916 917 capab = wiphy->iftype_ext_capab; 918 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 919 if (capab[0].extended_capabilities_len > j) 920 supported_on_all = 921 capab[0].extended_capabilities[j]; 922 else 923 supported_on_all = 0x00; 924 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 925 if (j >= capab[i].extended_capabilities_len) { 926 supported_on_all = 0x00; 927 break; 928 } 929 supported_on_all &= 930 capab[i].extended_capabilities[j]; 931 } 932 if (WARN_ON(wiphy->extended_capabilities[j] & 933 ~supported_on_all)) 934 break; 935 } 936 } 937 938 rdev->wiphy.registered = true; 939 rtnl_unlock(); 940 941 res = rfkill_register(rdev->rfkill); 942 if (res) { 943 rfkill_destroy(rdev->rfkill); 944 rdev->rfkill = NULL; 945 wiphy_unregister(&rdev->wiphy); 946 return res; 947 } 948 949 return 0; 950 } 951 EXPORT_SYMBOL(wiphy_register); 952 953 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 954 { 955 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 956 957 if (!rdev->ops->rfkill_poll) 958 return; 959 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 960 rfkill_resume_polling(rdev->rfkill); 961 } 962 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 963 964 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 965 { 966 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 967 968 rfkill_pause_polling(rdev->rfkill); 969 } 970 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 971 972 void wiphy_unregister(struct wiphy *wiphy) 973 { 974 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 975 976 wait_event(rdev->dev_wait, ({ 977 int __count; 978 rtnl_lock(); 979 __count = rdev->opencount; 980 rtnl_unlock(); 981 __count == 0; })); 982 983 if (rdev->rfkill) 984 rfkill_unregister(rdev->rfkill); 985 986 rtnl_lock(); 987 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 988 rdev->wiphy.registered = false; 989 990 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 991 992 /* 993 * First remove the hardware from everywhere, this makes 994 * it impossible to find from userspace. 995 */ 996 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 997 list_del_rcu(&rdev->list); 998 synchronize_rcu(); 999 1000 /* 1001 * If this device got a regulatory hint tell core its 1002 * free to listen now to a new shiny device regulatory hint 1003 */ 1004 wiphy_regulatory_deregister(wiphy); 1005 1006 cfg80211_rdev_list_generation++; 1007 device_del(&rdev->wiphy.dev); 1008 1009 rtnl_unlock(); 1010 1011 flush_work(&rdev->scan_done_wk); 1012 cancel_work_sync(&rdev->conn_work); 1013 flush_work(&rdev->event_work); 1014 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1015 flush_work(&rdev->destroy_work); 1016 flush_work(&rdev->sched_scan_stop_wk); 1017 flush_work(&rdev->mlme_unreg_wk); 1018 flush_work(&rdev->propagate_radar_detect_wk); 1019 flush_work(&rdev->propagate_cac_done_wk); 1020 1021 #ifdef CONFIG_PM 1022 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1023 rdev_set_wakeup(rdev, false); 1024 #endif 1025 cfg80211_rdev_free_wowlan(rdev); 1026 cfg80211_rdev_free_coalesce(rdev); 1027 } 1028 EXPORT_SYMBOL(wiphy_unregister); 1029 1030 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1031 { 1032 struct cfg80211_internal_bss *scan, *tmp; 1033 struct cfg80211_beacon_registration *reg, *treg; 1034 rfkill_destroy(rdev->rfkill); 1035 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1036 list_del(®->list); 1037 kfree(reg); 1038 } 1039 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1040 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1041 kfree(rdev); 1042 } 1043 1044 void wiphy_free(struct wiphy *wiphy) 1045 { 1046 put_device(&wiphy->dev); 1047 } 1048 EXPORT_SYMBOL(wiphy_free); 1049 1050 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 1051 { 1052 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1053 1054 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 1055 schedule_work(&rdev->rfkill_sync); 1056 } 1057 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 1058 1059 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 1060 { 1061 kfree(wdev->cqm_config); 1062 wdev->cqm_config = NULL; 1063 } 1064 1065 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync) 1066 { 1067 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1068 1069 ASSERT_RTNL(); 1070 1071 flush_work(&wdev->pmsr_free_wk); 1072 1073 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1074 1075 list_del_rcu(&wdev->list); 1076 if (sync) 1077 synchronize_rcu(); 1078 rdev->devlist_generation++; 1079 1080 cfg80211_mlme_purge_registrations(wdev); 1081 1082 switch (wdev->iftype) { 1083 case NL80211_IFTYPE_P2P_DEVICE: 1084 cfg80211_stop_p2p_device(rdev, wdev); 1085 break; 1086 case NL80211_IFTYPE_NAN: 1087 cfg80211_stop_nan(rdev, wdev); 1088 break; 1089 default: 1090 break; 1091 } 1092 1093 #ifdef CONFIG_CFG80211_WEXT 1094 kzfree(wdev->wext.keys); 1095 #endif 1096 /* only initialized if we have a netdev */ 1097 if (wdev->netdev) 1098 flush_work(&wdev->disconnect_wk); 1099 1100 cfg80211_cqm_config_free(wdev); 1101 } 1102 1103 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1104 { 1105 if (WARN_ON(wdev->netdev)) 1106 return; 1107 1108 __cfg80211_unregister_wdev(wdev, true); 1109 } 1110 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1111 1112 static const struct device_type wiphy_type = { 1113 .name = "wlan", 1114 }; 1115 1116 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1117 enum nl80211_iftype iftype, int num) 1118 { 1119 ASSERT_RTNL(); 1120 1121 rdev->num_running_ifaces += num; 1122 if (iftype == NL80211_IFTYPE_MONITOR) 1123 rdev->num_running_monitor_ifaces += num; 1124 } 1125 1126 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1127 struct wireless_dev *wdev) 1128 { 1129 struct net_device *dev = wdev->netdev; 1130 struct cfg80211_sched_scan_request *pos, *tmp; 1131 1132 ASSERT_RTNL(); 1133 ASSERT_WDEV_LOCK(wdev); 1134 1135 cfg80211_pmsr_wdev_down(wdev); 1136 1137 switch (wdev->iftype) { 1138 case NL80211_IFTYPE_ADHOC: 1139 __cfg80211_leave_ibss(rdev, dev, true); 1140 break; 1141 case NL80211_IFTYPE_P2P_CLIENT: 1142 case NL80211_IFTYPE_STATION: 1143 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1144 list) { 1145 if (dev == pos->dev) 1146 cfg80211_stop_sched_scan_req(rdev, pos, false); 1147 } 1148 1149 #ifdef CONFIG_CFG80211_WEXT 1150 kfree(wdev->wext.ie); 1151 wdev->wext.ie = NULL; 1152 wdev->wext.ie_len = 0; 1153 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1154 #endif 1155 cfg80211_disconnect(rdev, dev, 1156 WLAN_REASON_DEAUTH_LEAVING, true); 1157 break; 1158 case NL80211_IFTYPE_MESH_POINT: 1159 __cfg80211_leave_mesh(rdev, dev); 1160 break; 1161 case NL80211_IFTYPE_AP: 1162 case NL80211_IFTYPE_P2P_GO: 1163 __cfg80211_stop_ap(rdev, dev, true); 1164 break; 1165 case NL80211_IFTYPE_OCB: 1166 __cfg80211_leave_ocb(rdev, dev); 1167 break; 1168 case NL80211_IFTYPE_WDS: 1169 /* must be handled by mac80211/driver, has no APIs */ 1170 break; 1171 case NL80211_IFTYPE_P2P_DEVICE: 1172 case NL80211_IFTYPE_NAN: 1173 /* cannot happen, has no netdev */ 1174 break; 1175 case NL80211_IFTYPE_AP_VLAN: 1176 case NL80211_IFTYPE_MONITOR: 1177 /* nothing to do */ 1178 break; 1179 case NL80211_IFTYPE_UNSPECIFIED: 1180 case NUM_NL80211_IFTYPES: 1181 /* invalid */ 1182 break; 1183 } 1184 } 1185 1186 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1187 struct wireless_dev *wdev) 1188 { 1189 wdev_lock(wdev); 1190 __cfg80211_leave(rdev, wdev); 1191 wdev_unlock(wdev); 1192 } 1193 1194 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1195 gfp_t gfp) 1196 { 1197 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1198 struct cfg80211_event *ev; 1199 unsigned long flags; 1200 1201 trace_cfg80211_stop_iface(wiphy, wdev); 1202 1203 ev = kzalloc(sizeof(*ev), gfp); 1204 if (!ev) 1205 return; 1206 1207 ev->type = EVENT_STOPPED; 1208 1209 spin_lock_irqsave(&wdev->event_lock, flags); 1210 list_add_tail(&ev->list, &wdev->event_list); 1211 spin_unlock_irqrestore(&wdev->event_lock, flags); 1212 queue_work(cfg80211_wq, &rdev->event_work); 1213 } 1214 EXPORT_SYMBOL(cfg80211_stop_iface); 1215 1216 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 1217 struct wireless_dev *wdev) 1218 { 1219 mutex_init(&wdev->mtx); 1220 INIT_LIST_HEAD(&wdev->event_list); 1221 spin_lock_init(&wdev->event_lock); 1222 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1223 spin_lock_init(&wdev->mgmt_registrations_lock); 1224 INIT_LIST_HEAD(&wdev->pmsr_list); 1225 spin_lock_init(&wdev->pmsr_lock); 1226 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1227 1228 /* 1229 * We get here also when the interface changes network namespaces, 1230 * as it's registered into the new one, but we don't want it to 1231 * change ID in that case. Checking if the ID is already assigned 1232 * works, because 0 isn't considered a valid ID and the memory is 1233 * 0-initialized. 1234 */ 1235 if (!wdev->identifier) 1236 wdev->identifier = ++rdev->wdev_id; 1237 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1238 rdev->devlist_generation++; 1239 1240 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1241 } 1242 1243 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1244 unsigned long state, void *ptr) 1245 { 1246 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1247 struct wireless_dev *wdev = dev->ieee80211_ptr; 1248 struct cfg80211_registered_device *rdev; 1249 struct cfg80211_sched_scan_request *pos, *tmp; 1250 1251 if (!wdev) 1252 return NOTIFY_DONE; 1253 1254 rdev = wiphy_to_rdev(wdev->wiphy); 1255 1256 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1257 1258 switch (state) { 1259 case NETDEV_POST_INIT: 1260 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1261 break; 1262 case NETDEV_REGISTER: 1263 /* 1264 * NB: cannot take rdev->mtx here because this may be 1265 * called within code protected by it when interfaces 1266 * are added with nl80211. 1267 */ 1268 /* can only change netns with wiphy */ 1269 dev->features |= NETIF_F_NETNS_LOCAL; 1270 1271 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1272 "phy80211")) { 1273 pr_err("failed to add phy80211 symlink to netdev!\n"); 1274 } 1275 wdev->netdev = dev; 1276 #ifdef CONFIG_CFG80211_WEXT 1277 wdev->wext.default_key = -1; 1278 wdev->wext.default_mgmt_key = -1; 1279 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1280 #endif 1281 1282 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1283 wdev->ps = true; 1284 else 1285 wdev->ps = false; 1286 /* allow mac80211 to determine the timeout */ 1287 wdev->ps_timeout = -1; 1288 1289 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1290 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1291 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1292 dev->priv_flags |= IFF_DONT_BRIDGE; 1293 1294 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1295 1296 cfg80211_init_wdev(rdev, wdev); 1297 break; 1298 case NETDEV_GOING_DOWN: 1299 cfg80211_leave(rdev, wdev); 1300 break; 1301 case NETDEV_DOWN: 1302 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1303 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1304 if (WARN_ON(!rdev->scan_req->notified)) 1305 rdev->scan_req->info.aborted = true; 1306 ___cfg80211_scan_done(rdev, false); 1307 } 1308 1309 list_for_each_entry_safe(pos, tmp, 1310 &rdev->sched_scan_req_list, list) { 1311 if (WARN_ON(pos->dev == wdev->netdev)) 1312 cfg80211_stop_sched_scan_req(rdev, pos, false); 1313 } 1314 1315 rdev->opencount--; 1316 wake_up(&rdev->dev_wait); 1317 break; 1318 case NETDEV_UP: 1319 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1320 wdev_lock(wdev); 1321 switch (wdev->iftype) { 1322 #ifdef CONFIG_CFG80211_WEXT 1323 case NL80211_IFTYPE_ADHOC: 1324 cfg80211_ibss_wext_join(rdev, wdev); 1325 break; 1326 case NL80211_IFTYPE_STATION: 1327 cfg80211_mgd_wext_connect(rdev, wdev); 1328 break; 1329 #endif 1330 #ifdef CONFIG_MAC80211_MESH 1331 case NL80211_IFTYPE_MESH_POINT: 1332 { 1333 /* backward compat code... */ 1334 struct mesh_setup setup; 1335 memcpy(&setup, &default_mesh_setup, 1336 sizeof(setup)); 1337 /* back compat only needed for mesh_id */ 1338 setup.mesh_id = wdev->ssid; 1339 setup.mesh_id_len = wdev->mesh_id_up_len; 1340 if (wdev->mesh_id_up_len) 1341 __cfg80211_join_mesh(rdev, dev, 1342 &setup, 1343 &default_mesh_config); 1344 break; 1345 } 1346 #endif 1347 default: 1348 break; 1349 } 1350 wdev_unlock(wdev); 1351 rdev->opencount++; 1352 1353 /* 1354 * Configure power management to the driver here so that its 1355 * correctly set also after interface type changes etc. 1356 */ 1357 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1358 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1359 rdev->ops->set_power_mgmt && 1360 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1361 wdev->ps_timeout)) { 1362 /* assume this means it's off */ 1363 wdev->ps = false; 1364 } 1365 break; 1366 case NETDEV_UNREGISTER: 1367 /* 1368 * It is possible to get NETDEV_UNREGISTER 1369 * multiple times. To detect that, check 1370 * that the interface is still on the list 1371 * of registered interfaces, and only then 1372 * remove and clean it up. 1373 */ 1374 if (!list_empty(&wdev->list)) { 1375 __cfg80211_unregister_wdev(wdev, false); 1376 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1377 } 1378 /* 1379 * synchronise (so that we won't find this netdev 1380 * from other code any more) and then clear the list 1381 * head so that the above code can safely check for 1382 * !list_empty() to avoid double-cleanup. 1383 */ 1384 synchronize_rcu(); 1385 INIT_LIST_HEAD(&wdev->list); 1386 /* 1387 * Ensure that all events have been processed and 1388 * freed. 1389 */ 1390 cfg80211_process_wdev_events(wdev); 1391 1392 if (WARN_ON(wdev->current_bss)) { 1393 cfg80211_unhold_bss(wdev->current_bss); 1394 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1395 wdev->current_bss = NULL; 1396 } 1397 break; 1398 case NETDEV_PRE_UP: 1399 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 1400 return notifier_from_errno(-EOPNOTSUPP); 1401 if (rfkill_blocked(rdev->rfkill)) 1402 return notifier_from_errno(-ERFKILL); 1403 break; 1404 default: 1405 return NOTIFY_DONE; 1406 } 1407 1408 wireless_nlevent_flush(); 1409 1410 return NOTIFY_OK; 1411 } 1412 1413 static struct notifier_block cfg80211_netdev_notifier = { 1414 .notifier_call = cfg80211_netdev_notifier_call, 1415 }; 1416 1417 static void __net_exit cfg80211_pernet_exit(struct net *net) 1418 { 1419 struct cfg80211_registered_device *rdev; 1420 1421 rtnl_lock(); 1422 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1423 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1424 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1425 } 1426 rtnl_unlock(); 1427 } 1428 1429 static struct pernet_operations cfg80211_pernet_ops = { 1430 .exit = cfg80211_pernet_exit, 1431 }; 1432 1433 static int __init cfg80211_init(void) 1434 { 1435 int err; 1436 1437 err = register_pernet_device(&cfg80211_pernet_ops); 1438 if (err) 1439 goto out_fail_pernet; 1440 1441 err = wiphy_sysfs_init(); 1442 if (err) 1443 goto out_fail_sysfs; 1444 1445 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1446 if (err) 1447 goto out_fail_notifier; 1448 1449 err = nl80211_init(); 1450 if (err) 1451 goto out_fail_nl80211; 1452 1453 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1454 1455 err = regulatory_init(); 1456 if (err) 1457 goto out_fail_reg; 1458 1459 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1460 if (!cfg80211_wq) { 1461 err = -ENOMEM; 1462 goto out_fail_wq; 1463 } 1464 1465 return 0; 1466 1467 out_fail_wq: 1468 regulatory_exit(); 1469 out_fail_reg: 1470 debugfs_remove(ieee80211_debugfs_dir); 1471 nl80211_exit(); 1472 out_fail_nl80211: 1473 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1474 out_fail_notifier: 1475 wiphy_sysfs_exit(); 1476 out_fail_sysfs: 1477 unregister_pernet_device(&cfg80211_pernet_ops); 1478 out_fail_pernet: 1479 return err; 1480 } 1481 fs_initcall(cfg80211_init); 1482 1483 static void __exit cfg80211_exit(void) 1484 { 1485 debugfs_remove(ieee80211_debugfs_dir); 1486 nl80211_exit(); 1487 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1488 wiphy_sysfs_exit(); 1489 regulatory_exit(); 1490 unregister_pernet_device(&cfg80211_pernet_ops); 1491 destroy_workqueue(cfg80211_wq); 1492 } 1493 module_exit(cfg80211_exit); 1494