1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This is the linux wireless configuration interface. 4 * 5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright 2015-2017 Intel Deutschland GmbH 8 * Copyright (C) 2018 Intel Corporation 9 */ 10 11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 12 13 #include <linux/if.h> 14 #include <linux/module.h> 15 #include <linux/err.h> 16 #include <linux/list.h> 17 #include <linux/slab.h> 18 #include <linux/nl80211.h> 19 #include <linux/debugfs.h> 20 #include <linux/notifier.h> 21 #include <linux/device.h> 22 #include <linux/etherdevice.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/sched.h> 25 #include <net/genetlink.h> 26 #include <net/cfg80211.h> 27 #include "nl80211.h" 28 #include "core.h" 29 #include "sysfs.h" 30 #include "debugfs.h" 31 #include "wext-compat.h" 32 #include "rdev-ops.h" 33 34 /* name for sysfs, %d is appended */ 35 #define PHY_NAME "phy" 36 37 MODULE_AUTHOR("Johannes Berg"); 38 MODULE_LICENSE("GPL"); 39 MODULE_DESCRIPTION("wireless configuration support"); 40 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 41 42 /* RCU-protected (and RTNL for writers) */ 43 LIST_HEAD(cfg80211_rdev_list); 44 int cfg80211_rdev_list_generation; 45 46 /* for debugfs */ 47 static struct dentry *ieee80211_debugfs_dir; 48 49 /* for the cleanup, scan and event works */ 50 struct workqueue_struct *cfg80211_wq; 51 52 static bool cfg80211_disable_40mhz_24ghz; 53 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 54 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 55 "Disable 40MHz support in the 2.4GHz band"); 56 57 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 58 { 59 struct cfg80211_registered_device *result = NULL, *rdev; 60 61 ASSERT_RTNL(); 62 63 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 64 if (rdev->wiphy_idx == wiphy_idx) { 65 result = rdev; 66 break; 67 } 68 } 69 70 return result; 71 } 72 73 int get_wiphy_idx(struct wiphy *wiphy) 74 { 75 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 76 77 return rdev->wiphy_idx; 78 } 79 80 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 81 { 82 struct cfg80211_registered_device *rdev; 83 84 ASSERT_RTNL(); 85 86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 87 if (!rdev) 88 return NULL; 89 return &rdev->wiphy; 90 } 91 92 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 93 const char *newname) 94 { 95 struct cfg80211_registered_device *rdev2; 96 int wiphy_idx, taken = -1, digits; 97 98 ASSERT_RTNL(); 99 100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) 101 return -EINVAL; 102 103 /* prohibit calling the thing phy%d when %d is not its number */ 104 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 105 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 106 /* count number of places needed to print wiphy_idx */ 107 digits = 1; 108 while (wiphy_idx /= 10) 109 digits++; 110 /* 111 * deny the name if it is phy<idx> where <idx> is printed 112 * without leading zeroes. taken == strlen(newname) here 113 */ 114 if (taken == strlen(PHY_NAME) + digits) 115 return -EINVAL; 116 } 117 118 /* Ensure another device does not already have this name. */ 119 list_for_each_entry(rdev2, &cfg80211_rdev_list, list) 120 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 121 return -EINVAL; 122 123 return 0; 124 } 125 126 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 127 char *newname) 128 { 129 int result; 130 131 ASSERT_RTNL(); 132 133 /* Ignore nop renames */ 134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 135 return 0; 136 137 result = cfg80211_dev_check_name(rdev, newname); 138 if (result < 0) 139 return result; 140 141 result = device_rename(&rdev->wiphy.dev, newname); 142 if (result) 143 return result; 144 145 if (rdev->wiphy.debugfsdir && 146 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, 147 rdev->wiphy.debugfsdir, 148 rdev->wiphy.debugfsdir->d_parent, 149 newname)) 150 pr_err("failed to rename debugfs dir to %s!\n", newname); 151 152 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 153 154 return 0; 155 } 156 157 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 158 struct net *net) 159 { 160 struct wireless_dev *wdev; 161 int err = 0; 162 163 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 164 return -EOPNOTSUPP; 165 166 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 167 if (!wdev->netdev) 168 continue; 169 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 170 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 171 if (err) 172 break; 173 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 174 } 175 176 if (err) { 177 /* failed -- clean up to old netns */ 178 net = wiphy_net(&rdev->wiphy); 179 180 list_for_each_entry_continue_reverse(wdev, 181 &rdev->wiphy.wdev_list, 182 list) { 183 if (!wdev->netdev) 184 continue; 185 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 186 err = dev_change_net_namespace(wdev->netdev, net, 187 "wlan%d"); 188 WARN_ON(err); 189 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 190 } 191 192 return err; 193 } 194 195 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 196 if (!wdev->netdev) 197 continue; 198 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 199 } 200 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 201 202 wiphy_net_set(&rdev->wiphy, net); 203 204 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 205 WARN_ON(err); 206 207 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 208 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 209 if (!wdev->netdev) 210 continue; 211 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 212 } 213 214 return 0; 215 } 216 217 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 218 { 219 struct cfg80211_registered_device *rdev = data; 220 221 rdev_rfkill_poll(rdev); 222 } 223 224 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 225 struct wireless_dev *wdev) 226 { 227 ASSERT_RTNL(); 228 229 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 230 return; 231 232 if (!wdev_running(wdev)) 233 return; 234 235 rdev_stop_p2p_device(rdev, wdev); 236 wdev->is_running = false; 237 238 rdev->opencount--; 239 240 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 241 if (WARN_ON(!rdev->scan_req->notified)) 242 rdev->scan_req->info.aborted = true; 243 ___cfg80211_scan_done(rdev, false); 244 } 245 } 246 247 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 248 struct wireless_dev *wdev) 249 { 250 ASSERT_RTNL(); 251 252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 253 return; 254 255 if (!wdev_running(wdev)) 256 return; 257 258 rdev_stop_nan(rdev, wdev); 259 wdev->is_running = false; 260 261 rdev->opencount--; 262 } 263 264 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 265 { 266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 267 struct wireless_dev *wdev; 268 269 ASSERT_RTNL(); 270 271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 272 if (wdev->netdev) { 273 dev_close(wdev->netdev); 274 continue; 275 } 276 /* otherwise, check iftype */ 277 switch (wdev->iftype) { 278 case NL80211_IFTYPE_P2P_DEVICE: 279 cfg80211_stop_p2p_device(rdev, wdev); 280 break; 281 case NL80211_IFTYPE_NAN: 282 cfg80211_stop_nan(rdev, wdev); 283 break; 284 default: 285 break; 286 } 287 } 288 } 289 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 290 291 static int cfg80211_rfkill_set_block(void *data, bool blocked) 292 { 293 struct cfg80211_registered_device *rdev = data; 294 295 if (!blocked) 296 return 0; 297 298 rtnl_lock(); 299 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 300 rtnl_unlock(); 301 302 return 0; 303 } 304 305 static void cfg80211_rfkill_sync_work(struct work_struct *work) 306 { 307 struct cfg80211_registered_device *rdev; 308 309 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); 310 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); 311 } 312 313 static void cfg80211_event_work(struct work_struct *work) 314 { 315 struct cfg80211_registered_device *rdev; 316 317 rdev = container_of(work, struct cfg80211_registered_device, 318 event_work); 319 320 rtnl_lock(); 321 cfg80211_process_rdev_events(rdev); 322 rtnl_unlock(); 323 } 324 325 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 326 { 327 struct wireless_dev *wdev, *tmp; 328 329 ASSERT_RTNL(); 330 331 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 332 if (wdev->nl_owner_dead) 333 rdev_del_virtual_intf(rdev, wdev); 334 } 335 } 336 337 static void cfg80211_destroy_iface_wk(struct work_struct *work) 338 { 339 struct cfg80211_registered_device *rdev; 340 341 rdev = container_of(work, struct cfg80211_registered_device, 342 destroy_work); 343 344 rtnl_lock(); 345 cfg80211_destroy_ifaces(rdev); 346 rtnl_unlock(); 347 } 348 349 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 350 { 351 struct cfg80211_registered_device *rdev; 352 struct cfg80211_sched_scan_request *req, *tmp; 353 354 rdev = container_of(work, struct cfg80211_registered_device, 355 sched_scan_stop_wk); 356 357 rtnl_lock(); 358 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 359 if (req->nl_owner_dead) 360 cfg80211_stop_sched_scan_req(rdev, req, false); 361 } 362 rtnl_unlock(); 363 } 364 365 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 366 { 367 struct cfg80211_registered_device *rdev; 368 369 rdev = container_of(work, struct cfg80211_registered_device, 370 propagate_radar_detect_wk); 371 372 rtnl_lock(); 373 374 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 375 NL80211_DFS_UNAVAILABLE, 376 NL80211_RADAR_DETECTED); 377 378 rtnl_unlock(); 379 } 380 381 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 382 { 383 struct cfg80211_registered_device *rdev; 384 385 rdev = container_of(work, struct cfg80211_registered_device, 386 propagate_cac_done_wk); 387 388 rtnl_lock(); 389 390 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 391 NL80211_DFS_AVAILABLE, 392 NL80211_RADAR_CAC_FINISHED); 393 394 rtnl_unlock(); 395 } 396 397 /* exported functions */ 398 399 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 400 const char *requested_name) 401 { 402 static atomic_t wiphy_counter = ATOMIC_INIT(0); 403 404 struct cfg80211_registered_device *rdev; 405 int alloc_size; 406 407 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 408 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 409 WARN_ON(ops->connect && !ops->disconnect); 410 WARN_ON(ops->join_ibss && !ops->leave_ibss); 411 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 412 WARN_ON(ops->add_station && !ops->del_station); 413 WARN_ON(ops->add_mpath && !ops->del_mpath); 414 WARN_ON(ops->join_mesh && !ops->leave_mesh); 415 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 416 WARN_ON(ops->start_ap && !ops->stop_ap); 417 WARN_ON(ops->join_ocb && !ops->leave_ocb); 418 WARN_ON(ops->suspend && !ops->resume); 419 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 420 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 421 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 422 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 423 424 alloc_size = sizeof(*rdev) + sizeof_priv; 425 426 rdev = kzalloc(alloc_size, GFP_KERNEL); 427 if (!rdev) 428 return NULL; 429 430 rdev->ops = ops; 431 432 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 433 434 if (unlikely(rdev->wiphy_idx < 0)) { 435 /* ugh, wrapped! */ 436 atomic_dec(&wiphy_counter); 437 kfree(rdev); 438 return NULL; 439 } 440 441 /* atomic_inc_return makes it start at 1, make it start at 0 */ 442 rdev->wiphy_idx--; 443 444 /* give it a proper name */ 445 if (requested_name && requested_name[0]) { 446 int rv; 447 448 rtnl_lock(); 449 rv = cfg80211_dev_check_name(rdev, requested_name); 450 451 if (rv < 0) { 452 rtnl_unlock(); 453 goto use_default_name; 454 } 455 456 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 457 rtnl_unlock(); 458 if (rv) 459 goto use_default_name; 460 } else { 461 int rv; 462 463 use_default_name: 464 /* NOTE: This is *probably* safe w/out holding rtnl because of 465 * the restrictions on phy names. Probably this call could 466 * fail if some other part of the kernel (re)named a device 467 * phyX. But, might should add some locking and check return 468 * value, and use a different name if this one exists? 469 */ 470 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 471 if (rv < 0) { 472 kfree(rdev); 473 return NULL; 474 } 475 } 476 477 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 478 INIT_LIST_HEAD(&rdev->beacon_registrations); 479 spin_lock_init(&rdev->beacon_registrations_lock); 480 spin_lock_init(&rdev->bss_lock); 481 INIT_LIST_HEAD(&rdev->bss_list); 482 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 483 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 484 INIT_LIST_HEAD(&rdev->mlme_unreg); 485 spin_lock_init(&rdev->mlme_unreg_lock); 486 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 487 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 488 cfg80211_dfs_channels_update_work); 489 #ifdef CONFIG_CFG80211_WEXT 490 rdev->wiphy.wext = &cfg80211_wext_handler; 491 #endif 492 493 device_initialize(&rdev->wiphy.dev); 494 rdev->wiphy.dev.class = &ieee80211_class; 495 rdev->wiphy.dev.platform_data = rdev; 496 device_enable_async_suspend(&rdev->wiphy.dev); 497 498 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 499 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 500 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 501 INIT_WORK(&rdev->propagate_radar_detect_wk, 502 cfg80211_propagate_radar_detect_wk); 503 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 504 505 #ifdef CONFIG_CFG80211_DEFAULT_PS 506 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 507 #endif 508 509 wiphy_net_set(&rdev->wiphy, &init_net); 510 511 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 512 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 513 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 514 &rdev->rfkill_ops, rdev); 515 516 if (!rdev->rfkill) { 517 wiphy_free(&rdev->wiphy); 518 return NULL; 519 } 520 521 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 522 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 523 INIT_WORK(&rdev->event_work, cfg80211_event_work); 524 525 init_waitqueue_head(&rdev->dev_wait); 526 527 /* 528 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 529 * Fragmentation and RTS threshold are disabled by default with the 530 * special -1 value. 531 */ 532 rdev->wiphy.retry_short = 7; 533 rdev->wiphy.retry_long = 4; 534 rdev->wiphy.frag_threshold = (u32) -1; 535 rdev->wiphy.rts_threshold = (u32) -1; 536 rdev->wiphy.coverage_class = 0; 537 538 rdev->wiphy.max_num_csa_counters = 1; 539 540 rdev->wiphy.max_sched_scan_plans = 1; 541 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 542 543 return &rdev->wiphy; 544 } 545 EXPORT_SYMBOL(wiphy_new_nm); 546 547 static int wiphy_verify_combinations(struct wiphy *wiphy) 548 { 549 const struct ieee80211_iface_combination *c; 550 int i, j; 551 552 for (i = 0; i < wiphy->n_iface_combinations; i++) { 553 u32 cnt = 0; 554 u16 all_iftypes = 0; 555 556 c = &wiphy->iface_combinations[i]; 557 558 /* 559 * Combinations with just one interface aren't real, 560 * however we make an exception for DFS. 561 */ 562 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 563 return -EINVAL; 564 565 /* Need at least one channel */ 566 if (WARN_ON(!c->num_different_channels)) 567 return -EINVAL; 568 569 /* 570 * Put a sane limit on maximum number of different 571 * channels to simplify channel accounting code. 572 */ 573 if (WARN_ON(c->num_different_channels > 574 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 575 return -EINVAL; 576 577 /* DFS only works on one channel. */ 578 if (WARN_ON(c->radar_detect_widths && 579 (c->num_different_channels > 1))) 580 return -EINVAL; 581 582 if (WARN_ON(!c->n_limits)) 583 return -EINVAL; 584 585 for (j = 0; j < c->n_limits; j++) { 586 u16 types = c->limits[j].types; 587 588 /* interface types shouldn't overlap */ 589 if (WARN_ON(types & all_iftypes)) 590 return -EINVAL; 591 all_iftypes |= types; 592 593 if (WARN_ON(!c->limits[j].max)) 594 return -EINVAL; 595 596 /* Shouldn't list software iftypes in combinations! */ 597 if (WARN_ON(wiphy->software_iftypes & types)) 598 return -EINVAL; 599 600 /* Only a single P2P_DEVICE can be allowed */ 601 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 602 c->limits[j].max > 1)) 603 return -EINVAL; 604 605 /* Only a single NAN can be allowed */ 606 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 607 c->limits[j].max > 1)) 608 return -EINVAL; 609 610 /* 611 * This isn't well-defined right now. If you have an 612 * IBSS interface, then its beacon interval may change 613 * by joining other networks, and nothing prevents it 614 * from doing that. 615 * So technically we probably shouldn't even allow AP 616 * and IBSS in the same interface, but it seems that 617 * some drivers support that, possibly only with fixed 618 * beacon intervals for IBSS. 619 */ 620 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 621 c->beacon_int_min_gcd)) { 622 return -EINVAL; 623 } 624 625 cnt += c->limits[j].max; 626 /* 627 * Don't advertise an unsupported type 628 * in a combination. 629 */ 630 if (WARN_ON((wiphy->interface_modes & types) != types)) 631 return -EINVAL; 632 } 633 634 #ifndef CONFIG_WIRELESS_WDS 635 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 636 return -EINVAL; 637 #endif 638 639 /* You can't even choose that many! */ 640 if (WARN_ON(cnt < c->max_interfaces)) 641 return -EINVAL; 642 } 643 644 return 0; 645 } 646 647 int wiphy_register(struct wiphy *wiphy) 648 { 649 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 650 int res; 651 enum nl80211_band band; 652 struct ieee80211_supported_band *sband; 653 bool have_band = false; 654 int i; 655 u16 ifmodes = wiphy->interface_modes; 656 657 #ifdef CONFIG_PM 658 if (WARN_ON(wiphy->wowlan && 659 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 660 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 661 return -EINVAL; 662 if (WARN_ON(wiphy->wowlan && 663 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 664 !wiphy->wowlan->tcp)) 665 return -EINVAL; 666 #endif 667 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 668 (!rdev->ops->tdls_channel_switch || 669 !rdev->ops->tdls_cancel_channel_switch))) 670 return -EINVAL; 671 672 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 673 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 674 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 675 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 676 return -EINVAL; 677 678 #ifndef CONFIG_WIRELESS_WDS 679 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 680 return -EINVAL; 681 #endif 682 683 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 684 return -EINVAL; 685 686 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 687 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 688 !wiphy->pmsr_capa->ftm.non_asap)) 689 return -EINVAL; 690 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 691 !wiphy->pmsr_capa->ftm.bandwidths)) 692 return -EINVAL; 693 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 694 ~(BIT(NL80211_PREAMBLE_LEGACY) | 695 BIT(NL80211_PREAMBLE_HT) | 696 BIT(NL80211_PREAMBLE_VHT) | 697 BIT(NL80211_PREAMBLE_DMG)))) 698 return -EINVAL; 699 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 700 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 701 BIT(NL80211_CHAN_WIDTH_20) | 702 BIT(NL80211_CHAN_WIDTH_40) | 703 BIT(NL80211_CHAN_WIDTH_80) | 704 BIT(NL80211_CHAN_WIDTH_80P80) | 705 BIT(NL80211_CHAN_WIDTH_160) | 706 BIT(NL80211_CHAN_WIDTH_5) | 707 BIT(NL80211_CHAN_WIDTH_10)))) 708 return -EINVAL; 709 } 710 711 /* 712 * if a wiphy has unsupported modes for regulatory channel enforcement, 713 * opt-out of enforcement checking 714 */ 715 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 716 BIT(NL80211_IFTYPE_P2P_CLIENT) | 717 BIT(NL80211_IFTYPE_AP) | 718 BIT(NL80211_IFTYPE_P2P_GO) | 719 BIT(NL80211_IFTYPE_ADHOC) | 720 BIT(NL80211_IFTYPE_P2P_DEVICE) | 721 BIT(NL80211_IFTYPE_NAN) | 722 BIT(NL80211_IFTYPE_AP_VLAN) | 723 BIT(NL80211_IFTYPE_MONITOR))) 724 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 725 726 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 727 (wiphy->regulatory_flags & 728 (REGULATORY_CUSTOM_REG | 729 REGULATORY_STRICT_REG | 730 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 731 REGULATORY_COUNTRY_IE_IGNORE)))) 732 return -EINVAL; 733 734 if (WARN_ON(wiphy->coalesce && 735 (!wiphy->coalesce->n_rules || 736 !wiphy->coalesce->n_patterns) && 737 (!wiphy->coalesce->pattern_min_len || 738 wiphy->coalesce->pattern_min_len > 739 wiphy->coalesce->pattern_max_len))) 740 return -EINVAL; 741 742 if (WARN_ON(wiphy->ap_sme_capa && 743 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 744 return -EINVAL; 745 746 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 747 return -EINVAL; 748 749 if (WARN_ON(wiphy->addresses && 750 !is_zero_ether_addr(wiphy->perm_addr) && 751 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 752 ETH_ALEN))) 753 return -EINVAL; 754 755 if (WARN_ON(wiphy->max_acl_mac_addrs && 756 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 757 !rdev->ops->set_mac_acl))) 758 return -EINVAL; 759 760 /* assure only valid behaviours are flagged by driver 761 * hence subtract 2 as bit 0 is invalid. 762 */ 763 if (WARN_ON(wiphy->bss_select_support && 764 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 765 return -EINVAL; 766 767 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 768 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 769 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 770 return -EINVAL; 771 772 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 773 rdev->ops->update_connect_params)) 774 return -EINVAL; 775 776 if (wiphy->addresses) 777 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 778 779 /* sanity check ifmodes */ 780 WARN_ON(!ifmodes); 781 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 782 if (WARN_ON(ifmodes != wiphy->interface_modes)) 783 wiphy->interface_modes = ifmodes; 784 785 res = wiphy_verify_combinations(wiphy); 786 if (res) 787 return res; 788 789 /* sanity check supported bands/channels */ 790 for (band = 0; band < NUM_NL80211_BANDS; band++) { 791 u16 types = 0; 792 793 sband = wiphy->bands[band]; 794 if (!sband) 795 continue; 796 797 sband->band = band; 798 if (WARN_ON(!sband->n_channels)) 799 return -EINVAL; 800 /* 801 * on 60GHz band, there are no legacy rates, so 802 * n_bitrates is 0 803 */ 804 if (WARN_ON(band != NL80211_BAND_60GHZ && 805 !sband->n_bitrates)) 806 return -EINVAL; 807 808 /* 809 * Since cfg80211_disable_40mhz_24ghz is global, we can 810 * modify the sband's ht data even if the driver uses a 811 * global structure for that. 812 */ 813 if (cfg80211_disable_40mhz_24ghz && 814 band == NL80211_BAND_2GHZ && 815 sband->ht_cap.ht_supported) { 816 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 817 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 818 } 819 820 /* 821 * Since we use a u32 for rate bitmaps in 822 * ieee80211_get_response_rate, we cannot 823 * have more than 32 legacy rates. 824 */ 825 if (WARN_ON(sband->n_bitrates > 32)) 826 return -EINVAL; 827 828 for (i = 0; i < sband->n_channels; i++) { 829 sband->channels[i].orig_flags = 830 sband->channels[i].flags; 831 sband->channels[i].orig_mag = INT_MAX; 832 sband->channels[i].orig_mpwr = 833 sband->channels[i].max_power; 834 sband->channels[i].band = band; 835 } 836 837 for (i = 0; i < sband->n_iftype_data; i++) { 838 const struct ieee80211_sband_iftype_data *iftd; 839 840 iftd = &sband->iftype_data[i]; 841 842 if (WARN_ON(!iftd->types_mask)) 843 return -EINVAL; 844 if (WARN_ON(types & iftd->types_mask)) 845 return -EINVAL; 846 847 /* at least one piece of information must be present */ 848 if (WARN_ON(!iftd->he_cap.has_he)) 849 return -EINVAL; 850 851 types |= iftd->types_mask; 852 } 853 854 have_band = true; 855 } 856 857 if (!have_band) { 858 WARN_ON(1); 859 return -EINVAL; 860 } 861 862 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 863 /* 864 * Validate we have a policy (can be explicitly set to 865 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 866 * we have at least one of doit/dumpit. 867 */ 868 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 869 return -EINVAL; 870 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 871 !rdev->wiphy.vendor_commands[i].dumpit)) 872 return -EINVAL; 873 } 874 875 #ifdef CONFIG_PM 876 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 877 (!rdev->wiphy.wowlan->pattern_min_len || 878 rdev->wiphy.wowlan->pattern_min_len > 879 rdev->wiphy.wowlan->pattern_max_len))) 880 return -EINVAL; 881 #endif 882 883 /* check and set up bitrates */ 884 ieee80211_set_bitrate_flags(wiphy); 885 886 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 887 888 rtnl_lock(); 889 res = device_add(&rdev->wiphy.dev); 890 if (res) { 891 rtnl_unlock(); 892 return res; 893 } 894 895 /* set up regulatory info */ 896 wiphy_regulatory_register(wiphy); 897 898 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 899 cfg80211_rdev_list_generation++; 900 901 /* add to debugfs */ 902 rdev->wiphy.debugfsdir = 903 debugfs_create_dir(wiphy_name(&rdev->wiphy), 904 ieee80211_debugfs_dir); 905 if (IS_ERR(rdev->wiphy.debugfsdir)) 906 rdev->wiphy.debugfsdir = NULL; 907 908 cfg80211_debugfs_rdev_add(rdev); 909 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 910 911 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 912 struct regulatory_request request; 913 914 request.wiphy_idx = get_wiphy_idx(wiphy); 915 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 916 request.alpha2[0] = '9'; 917 request.alpha2[1] = '9'; 918 919 nl80211_send_reg_change_event(&request); 920 } 921 922 /* Check that nobody globally advertises any capabilities they do not 923 * advertise on all possible interface types. 924 */ 925 if (wiphy->extended_capabilities_len && 926 wiphy->num_iftype_ext_capab && 927 wiphy->iftype_ext_capab) { 928 u8 supported_on_all, j; 929 const struct wiphy_iftype_ext_capab *capab; 930 931 capab = wiphy->iftype_ext_capab; 932 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 933 if (capab[0].extended_capabilities_len > j) 934 supported_on_all = 935 capab[0].extended_capabilities[j]; 936 else 937 supported_on_all = 0x00; 938 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 939 if (j >= capab[i].extended_capabilities_len) { 940 supported_on_all = 0x00; 941 break; 942 } 943 supported_on_all &= 944 capab[i].extended_capabilities[j]; 945 } 946 if (WARN_ON(wiphy->extended_capabilities[j] & 947 ~supported_on_all)) 948 break; 949 } 950 } 951 952 rdev->wiphy.registered = true; 953 rtnl_unlock(); 954 955 res = rfkill_register(rdev->rfkill); 956 if (res) { 957 rfkill_destroy(rdev->rfkill); 958 rdev->rfkill = NULL; 959 wiphy_unregister(&rdev->wiphy); 960 return res; 961 } 962 963 return 0; 964 } 965 EXPORT_SYMBOL(wiphy_register); 966 967 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 968 { 969 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 970 971 if (!rdev->ops->rfkill_poll) 972 return; 973 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 974 rfkill_resume_polling(rdev->rfkill); 975 } 976 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 977 978 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 979 { 980 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 981 982 rfkill_pause_polling(rdev->rfkill); 983 } 984 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 985 986 void wiphy_unregister(struct wiphy *wiphy) 987 { 988 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 989 990 wait_event(rdev->dev_wait, ({ 991 int __count; 992 rtnl_lock(); 993 __count = rdev->opencount; 994 rtnl_unlock(); 995 __count == 0; })); 996 997 if (rdev->rfkill) 998 rfkill_unregister(rdev->rfkill); 999 1000 rtnl_lock(); 1001 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1002 rdev->wiphy.registered = false; 1003 1004 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1005 1006 /* 1007 * First remove the hardware from everywhere, this makes 1008 * it impossible to find from userspace. 1009 */ 1010 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1011 list_del_rcu(&rdev->list); 1012 synchronize_rcu(); 1013 1014 /* 1015 * If this device got a regulatory hint tell core its 1016 * free to listen now to a new shiny device regulatory hint 1017 */ 1018 wiphy_regulatory_deregister(wiphy); 1019 1020 cfg80211_rdev_list_generation++; 1021 device_del(&rdev->wiphy.dev); 1022 1023 rtnl_unlock(); 1024 1025 flush_work(&rdev->scan_done_wk); 1026 cancel_work_sync(&rdev->conn_work); 1027 flush_work(&rdev->event_work); 1028 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1029 flush_work(&rdev->destroy_work); 1030 flush_work(&rdev->sched_scan_stop_wk); 1031 flush_work(&rdev->mlme_unreg_wk); 1032 flush_work(&rdev->propagate_radar_detect_wk); 1033 flush_work(&rdev->propagate_cac_done_wk); 1034 1035 #ifdef CONFIG_PM 1036 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1037 rdev_set_wakeup(rdev, false); 1038 #endif 1039 cfg80211_rdev_free_wowlan(rdev); 1040 cfg80211_rdev_free_coalesce(rdev); 1041 } 1042 EXPORT_SYMBOL(wiphy_unregister); 1043 1044 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1045 { 1046 struct cfg80211_internal_bss *scan, *tmp; 1047 struct cfg80211_beacon_registration *reg, *treg; 1048 rfkill_destroy(rdev->rfkill); 1049 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1050 list_del(®->list); 1051 kfree(reg); 1052 } 1053 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1054 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1055 kfree(rdev); 1056 } 1057 1058 void wiphy_free(struct wiphy *wiphy) 1059 { 1060 put_device(&wiphy->dev); 1061 } 1062 EXPORT_SYMBOL(wiphy_free); 1063 1064 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 1065 { 1066 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1067 1068 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 1069 schedule_work(&rdev->rfkill_sync); 1070 } 1071 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 1072 1073 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 1074 { 1075 kfree(wdev->cqm_config); 1076 wdev->cqm_config = NULL; 1077 } 1078 1079 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync) 1080 { 1081 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1082 1083 ASSERT_RTNL(); 1084 1085 flush_work(&wdev->pmsr_free_wk); 1086 1087 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1088 1089 list_del_rcu(&wdev->list); 1090 if (sync) 1091 synchronize_rcu(); 1092 rdev->devlist_generation++; 1093 1094 cfg80211_mlme_purge_registrations(wdev); 1095 1096 switch (wdev->iftype) { 1097 case NL80211_IFTYPE_P2P_DEVICE: 1098 cfg80211_stop_p2p_device(rdev, wdev); 1099 break; 1100 case NL80211_IFTYPE_NAN: 1101 cfg80211_stop_nan(rdev, wdev); 1102 break; 1103 default: 1104 break; 1105 } 1106 1107 #ifdef CONFIG_CFG80211_WEXT 1108 kzfree(wdev->wext.keys); 1109 #endif 1110 /* only initialized if we have a netdev */ 1111 if (wdev->netdev) 1112 flush_work(&wdev->disconnect_wk); 1113 1114 cfg80211_cqm_config_free(wdev); 1115 } 1116 1117 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1118 { 1119 if (WARN_ON(wdev->netdev)) 1120 return; 1121 1122 __cfg80211_unregister_wdev(wdev, true); 1123 } 1124 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1125 1126 static const struct device_type wiphy_type = { 1127 .name = "wlan", 1128 }; 1129 1130 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1131 enum nl80211_iftype iftype, int num) 1132 { 1133 ASSERT_RTNL(); 1134 1135 rdev->num_running_ifaces += num; 1136 if (iftype == NL80211_IFTYPE_MONITOR) 1137 rdev->num_running_monitor_ifaces += num; 1138 } 1139 1140 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1141 struct wireless_dev *wdev) 1142 { 1143 struct net_device *dev = wdev->netdev; 1144 struct cfg80211_sched_scan_request *pos, *tmp; 1145 1146 ASSERT_RTNL(); 1147 ASSERT_WDEV_LOCK(wdev); 1148 1149 cfg80211_pmsr_wdev_down(wdev); 1150 1151 switch (wdev->iftype) { 1152 case NL80211_IFTYPE_ADHOC: 1153 __cfg80211_leave_ibss(rdev, dev, true); 1154 break; 1155 case NL80211_IFTYPE_P2P_CLIENT: 1156 case NL80211_IFTYPE_STATION: 1157 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1158 list) { 1159 if (dev == pos->dev) 1160 cfg80211_stop_sched_scan_req(rdev, pos, false); 1161 } 1162 1163 #ifdef CONFIG_CFG80211_WEXT 1164 kfree(wdev->wext.ie); 1165 wdev->wext.ie = NULL; 1166 wdev->wext.ie_len = 0; 1167 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1168 #endif 1169 cfg80211_disconnect(rdev, dev, 1170 WLAN_REASON_DEAUTH_LEAVING, true); 1171 break; 1172 case NL80211_IFTYPE_MESH_POINT: 1173 __cfg80211_leave_mesh(rdev, dev); 1174 break; 1175 case NL80211_IFTYPE_AP: 1176 case NL80211_IFTYPE_P2P_GO: 1177 __cfg80211_stop_ap(rdev, dev, true); 1178 break; 1179 case NL80211_IFTYPE_OCB: 1180 __cfg80211_leave_ocb(rdev, dev); 1181 break; 1182 case NL80211_IFTYPE_WDS: 1183 /* must be handled by mac80211/driver, has no APIs */ 1184 break; 1185 case NL80211_IFTYPE_P2P_DEVICE: 1186 case NL80211_IFTYPE_NAN: 1187 /* cannot happen, has no netdev */ 1188 break; 1189 case NL80211_IFTYPE_AP_VLAN: 1190 case NL80211_IFTYPE_MONITOR: 1191 /* nothing to do */ 1192 break; 1193 case NL80211_IFTYPE_UNSPECIFIED: 1194 case NUM_NL80211_IFTYPES: 1195 /* invalid */ 1196 break; 1197 } 1198 } 1199 1200 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1201 struct wireless_dev *wdev) 1202 { 1203 wdev_lock(wdev); 1204 __cfg80211_leave(rdev, wdev); 1205 wdev_unlock(wdev); 1206 } 1207 1208 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1209 gfp_t gfp) 1210 { 1211 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1212 struct cfg80211_event *ev; 1213 unsigned long flags; 1214 1215 trace_cfg80211_stop_iface(wiphy, wdev); 1216 1217 ev = kzalloc(sizeof(*ev), gfp); 1218 if (!ev) 1219 return; 1220 1221 ev->type = EVENT_STOPPED; 1222 1223 spin_lock_irqsave(&wdev->event_lock, flags); 1224 list_add_tail(&ev->list, &wdev->event_list); 1225 spin_unlock_irqrestore(&wdev->event_lock, flags); 1226 queue_work(cfg80211_wq, &rdev->event_work); 1227 } 1228 EXPORT_SYMBOL(cfg80211_stop_iface); 1229 1230 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 1231 struct wireless_dev *wdev) 1232 { 1233 mutex_init(&wdev->mtx); 1234 INIT_LIST_HEAD(&wdev->event_list); 1235 spin_lock_init(&wdev->event_lock); 1236 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1237 spin_lock_init(&wdev->mgmt_registrations_lock); 1238 INIT_LIST_HEAD(&wdev->pmsr_list); 1239 spin_lock_init(&wdev->pmsr_lock); 1240 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1241 1242 /* 1243 * We get here also when the interface changes network namespaces, 1244 * as it's registered into the new one, but we don't want it to 1245 * change ID in that case. Checking if the ID is already assigned 1246 * works, because 0 isn't considered a valid ID and the memory is 1247 * 0-initialized. 1248 */ 1249 if (!wdev->identifier) 1250 wdev->identifier = ++rdev->wdev_id; 1251 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1252 rdev->devlist_generation++; 1253 1254 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1255 } 1256 1257 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1258 unsigned long state, void *ptr) 1259 { 1260 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1261 struct wireless_dev *wdev = dev->ieee80211_ptr; 1262 struct cfg80211_registered_device *rdev; 1263 struct cfg80211_sched_scan_request *pos, *tmp; 1264 1265 if (!wdev) 1266 return NOTIFY_DONE; 1267 1268 rdev = wiphy_to_rdev(wdev->wiphy); 1269 1270 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1271 1272 switch (state) { 1273 case NETDEV_POST_INIT: 1274 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1275 break; 1276 case NETDEV_REGISTER: 1277 /* 1278 * NB: cannot take rdev->mtx here because this may be 1279 * called within code protected by it when interfaces 1280 * are added with nl80211. 1281 */ 1282 /* can only change netns with wiphy */ 1283 dev->features |= NETIF_F_NETNS_LOCAL; 1284 1285 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1286 "phy80211")) { 1287 pr_err("failed to add phy80211 symlink to netdev!\n"); 1288 } 1289 wdev->netdev = dev; 1290 #ifdef CONFIG_CFG80211_WEXT 1291 wdev->wext.default_key = -1; 1292 wdev->wext.default_mgmt_key = -1; 1293 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1294 #endif 1295 1296 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1297 wdev->ps = true; 1298 else 1299 wdev->ps = false; 1300 /* allow mac80211 to determine the timeout */ 1301 wdev->ps_timeout = -1; 1302 1303 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1304 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1305 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1306 dev->priv_flags |= IFF_DONT_BRIDGE; 1307 1308 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1309 1310 cfg80211_init_wdev(rdev, wdev); 1311 break; 1312 case NETDEV_GOING_DOWN: 1313 cfg80211_leave(rdev, wdev); 1314 break; 1315 case NETDEV_DOWN: 1316 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1317 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1318 if (WARN_ON(!rdev->scan_req->notified)) 1319 rdev->scan_req->info.aborted = true; 1320 ___cfg80211_scan_done(rdev, false); 1321 } 1322 1323 list_for_each_entry_safe(pos, tmp, 1324 &rdev->sched_scan_req_list, list) { 1325 if (WARN_ON(pos->dev == wdev->netdev)) 1326 cfg80211_stop_sched_scan_req(rdev, pos, false); 1327 } 1328 1329 rdev->opencount--; 1330 wake_up(&rdev->dev_wait); 1331 break; 1332 case NETDEV_UP: 1333 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1334 wdev_lock(wdev); 1335 switch (wdev->iftype) { 1336 #ifdef CONFIG_CFG80211_WEXT 1337 case NL80211_IFTYPE_ADHOC: 1338 cfg80211_ibss_wext_join(rdev, wdev); 1339 break; 1340 case NL80211_IFTYPE_STATION: 1341 cfg80211_mgd_wext_connect(rdev, wdev); 1342 break; 1343 #endif 1344 #ifdef CONFIG_MAC80211_MESH 1345 case NL80211_IFTYPE_MESH_POINT: 1346 { 1347 /* backward compat code... */ 1348 struct mesh_setup setup; 1349 memcpy(&setup, &default_mesh_setup, 1350 sizeof(setup)); 1351 /* back compat only needed for mesh_id */ 1352 setup.mesh_id = wdev->ssid; 1353 setup.mesh_id_len = wdev->mesh_id_up_len; 1354 if (wdev->mesh_id_up_len) 1355 __cfg80211_join_mesh(rdev, dev, 1356 &setup, 1357 &default_mesh_config); 1358 break; 1359 } 1360 #endif 1361 default: 1362 break; 1363 } 1364 wdev_unlock(wdev); 1365 rdev->opencount++; 1366 1367 /* 1368 * Configure power management to the driver here so that its 1369 * correctly set also after interface type changes etc. 1370 */ 1371 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1372 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1373 rdev->ops->set_power_mgmt && 1374 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1375 wdev->ps_timeout)) { 1376 /* assume this means it's off */ 1377 wdev->ps = false; 1378 } 1379 break; 1380 case NETDEV_UNREGISTER: 1381 /* 1382 * It is possible to get NETDEV_UNREGISTER 1383 * multiple times. To detect that, check 1384 * that the interface is still on the list 1385 * of registered interfaces, and only then 1386 * remove and clean it up. 1387 */ 1388 if (!list_empty(&wdev->list)) { 1389 __cfg80211_unregister_wdev(wdev, false); 1390 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1391 } 1392 /* 1393 * synchronise (so that we won't find this netdev 1394 * from other code any more) and then clear the list 1395 * head so that the above code can safely check for 1396 * !list_empty() to avoid double-cleanup. 1397 */ 1398 synchronize_rcu(); 1399 INIT_LIST_HEAD(&wdev->list); 1400 /* 1401 * Ensure that all events have been processed and 1402 * freed. 1403 */ 1404 cfg80211_process_wdev_events(wdev); 1405 1406 if (WARN_ON(wdev->current_bss)) { 1407 cfg80211_unhold_bss(wdev->current_bss); 1408 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1409 wdev->current_bss = NULL; 1410 } 1411 break; 1412 case NETDEV_PRE_UP: 1413 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) && 1414 !(wdev->iftype == NL80211_IFTYPE_AP_VLAN && 1415 rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP && 1416 wdev->use_4addr)) 1417 return notifier_from_errno(-EOPNOTSUPP); 1418 1419 if (rfkill_blocked(rdev->rfkill)) 1420 return notifier_from_errno(-ERFKILL); 1421 break; 1422 default: 1423 return NOTIFY_DONE; 1424 } 1425 1426 wireless_nlevent_flush(); 1427 1428 return NOTIFY_OK; 1429 } 1430 1431 static struct notifier_block cfg80211_netdev_notifier = { 1432 .notifier_call = cfg80211_netdev_notifier_call, 1433 }; 1434 1435 static void __net_exit cfg80211_pernet_exit(struct net *net) 1436 { 1437 struct cfg80211_registered_device *rdev; 1438 1439 rtnl_lock(); 1440 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1441 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1442 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1443 } 1444 rtnl_unlock(); 1445 } 1446 1447 static struct pernet_operations cfg80211_pernet_ops = { 1448 .exit = cfg80211_pernet_exit, 1449 }; 1450 1451 static int __init cfg80211_init(void) 1452 { 1453 int err; 1454 1455 err = register_pernet_device(&cfg80211_pernet_ops); 1456 if (err) 1457 goto out_fail_pernet; 1458 1459 err = wiphy_sysfs_init(); 1460 if (err) 1461 goto out_fail_sysfs; 1462 1463 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1464 if (err) 1465 goto out_fail_notifier; 1466 1467 err = nl80211_init(); 1468 if (err) 1469 goto out_fail_nl80211; 1470 1471 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1472 1473 err = regulatory_init(); 1474 if (err) 1475 goto out_fail_reg; 1476 1477 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1478 if (!cfg80211_wq) { 1479 err = -ENOMEM; 1480 goto out_fail_wq; 1481 } 1482 1483 return 0; 1484 1485 out_fail_wq: 1486 regulatory_exit(); 1487 out_fail_reg: 1488 debugfs_remove(ieee80211_debugfs_dir); 1489 nl80211_exit(); 1490 out_fail_nl80211: 1491 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1492 out_fail_notifier: 1493 wiphy_sysfs_exit(); 1494 out_fail_sysfs: 1495 unregister_pernet_device(&cfg80211_pernet_ops); 1496 out_fail_pernet: 1497 return err; 1498 } 1499 fs_initcall(cfg80211_init); 1500 1501 static void __exit cfg80211_exit(void) 1502 { 1503 debugfs_remove(ieee80211_debugfs_dir); 1504 nl80211_exit(); 1505 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1506 wiphy_sysfs_exit(); 1507 regulatory_exit(); 1508 unregister_pernet_device(&cfg80211_pernet_ops); 1509 destroy_workqueue(cfg80211_wq); 1510 } 1511 module_exit(cfg80211_exit); 1512