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) 2018-2025 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 /* maximum length of radio debugfs directory name */ 38 #define RADIO_DEBUGFSDIR_MAX_LEN 8 39 40 MODULE_AUTHOR("Johannes Berg"); 41 MODULE_LICENSE("GPL"); 42 MODULE_DESCRIPTION("wireless configuration support"); 43 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 44 45 /* RCU-protected (and RTNL for writers) */ 46 LIST_HEAD(cfg80211_rdev_list); 47 int cfg80211_rdev_list_generation; 48 49 /* for debugfs */ 50 static struct dentry *ieee80211_debugfs_dir; 51 52 /* for the cleanup, scan and event works */ 53 struct workqueue_struct *cfg80211_wq; 54 55 static bool cfg80211_disable_40mhz_24ghz; 56 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 57 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 58 "Disable 40MHz support in the 2.4GHz band"); 59 60 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 61 { 62 struct cfg80211_registered_device *result = NULL, *rdev; 63 64 ASSERT_RTNL(); 65 66 for_each_rdev(rdev) { 67 if (rdev->wiphy_idx == wiphy_idx) { 68 result = rdev; 69 break; 70 } 71 } 72 73 return result; 74 } 75 76 int get_wiphy_idx(struct wiphy *wiphy) 77 { 78 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 79 80 return rdev->wiphy_idx; 81 } 82 83 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 84 { 85 struct cfg80211_registered_device *rdev; 86 87 ASSERT_RTNL(); 88 89 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 90 if (!rdev) 91 return NULL; 92 return &rdev->wiphy; 93 } 94 95 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 96 const char *newname) 97 { 98 struct cfg80211_registered_device *rdev2; 99 int wiphy_idx, taken = -1, digits; 100 101 ASSERT_RTNL(); 102 103 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) 104 return -EINVAL; 105 106 /* prohibit calling the thing phy%d when %d is not its number */ 107 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 108 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 109 /* count number of places needed to print wiphy_idx */ 110 digits = 1; 111 while (wiphy_idx /= 10) 112 digits++; 113 /* 114 * deny the name if it is phy<idx> where <idx> is printed 115 * without leading zeroes. taken == strlen(newname) here 116 */ 117 if (taken == strlen(PHY_NAME) + digits) 118 return -EINVAL; 119 } 120 121 /* Ensure another device does not already have this name. */ 122 for_each_rdev(rdev2) 123 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 124 return -EINVAL; 125 126 return 0; 127 } 128 129 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 130 char *newname) 131 { 132 int result; 133 134 ASSERT_RTNL(); 135 lockdep_assert_wiphy(&rdev->wiphy); 136 137 /* Ignore nop renames */ 138 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 139 return 0; 140 141 result = cfg80211_dev_check_name(rdev, newname); 142 if (result < 0) 143 return result; 144 145 result = device_rename(&rdev->wiphy.dev, newname); 146 if (result) 147 return result; 148 149 debugfs_change_name(rdev->wiphy.debugfsdir, "%s", 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->netns_immutable = false; 169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 170 if (err) 171 break; 172 wdev->netdev->netns_immutable = true; 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->netns_immutable = false; 185 err = dev_change_net_namespace(wdev->netdev, net, 186 "wlan%d"); 187 WARN_ON(err); 188 wdev->netdev->netns_immutable = true; 189 } 190 191 return err; 192 } 193 194 guard(wiphy)(&rdev->wiphy); 195 196 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 197 if (!wdev->netdev) 198 continue; 199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 200 } 201 202 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 203 204 wiphy_net_set(&rdev->wiphy, net); 205 206 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 207 WARN_ON(err); 208 209 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 210 211 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 212 if (!wdev->netdev) 213 continue; 214 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 215 } 216 217 return 0; 218 } 219 220 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 221 { 222 struct cfg80211_registered_device *rdev = data; 223 224 guard(wiphy)(&rdev->wiphy); 225 226 rdev_rfkill_poll(rdev); 227 } 228 229 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 230 struct wireless_dev *wdev) 231 { 232 lockdep_assert_held(&rdev->wiphy.mtx); 233 234 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 235 return; 236 237 if (!wdev_running(wdev)) 238 return; 239 240 rdev_stop_p2p_device(rdev, wdev); 241 wdev->is_running = false; 242 243 rdev->opencount--; 244 245 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 246 if (WARN_ON(!rdev->scan_req->notified && 247 (!rdev->int_scan_req || 248 !rdev->int_scan_req->notified))) 249 rdev->scan_req->info.aborted = true; 250 ___cfg80211_scan_done(rdev, false); 251 } 252 } 253 254 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 255 struct wireless_dev *wdev) 256 { 257 lockdep_assert_held(&rdev->wiphy.mtx); 258 259 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 260 return; 261 262 if (!wdev_running(wdev)) 263 return; 264 265 rdev_stop_nan(rdev, wdev); 266 wdev->is_running = false; 267 268 eth_zero_addr(wdev->u.nan.cluster_id); 269 270 rdev->opencount--; 271 } 272 273 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 274 { 275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 276 struct wireless_dev *wdev; 277 278 ASSERT_RTNL(); 279 280 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 281 if (wdev->netdev) { 282 dev_close(wdev->netdev); 283 continue; 284 } 285 286 /* otherwise, check iftype */ 287 288 guard(wiphy)(wiphy); 289 290 switch (wdev->iftype) { 291 case NL80211_IFTYPE_P2P_DEVICE: 292 cfg80211_stop_p2p_device(rdev, wdev); 293 break; 294 case NL80211_IFTYPE_NAN: 295 cfg80211_stop_nan(rdev, wdev); 296 break; 297 default: 298 break; 299 } 300 } 301 } 302 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 303 304 static int cfg80211_rfkill_set_block(void *data, bool blocked) 305 { 306 struct cfg80211_registered_device *rdev = data; 307 308 if (!blocked) 309 return 0; 310 311 rtnl_lock(); 312 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 313 rtnl_unlock(); 314 315 return 0; 316 } 317 318 static void cfg80211_rfkill_block_work(struct work_struct *work) 319 { 320 struct cfg80211_registered_device *rdev; 321 322 rdev = container_of(work, struct cfg80211_registered_device, 323 rfkill_block); 324 cfg80211_rfkill_set_block(rdev, true); 325 } 326 327 static void cfg80211_event_work(struct work_struct *work) 328 { 329 struct cfg80211_registered_device *rdev; 330 331 rdev = container_of(work, struct cfg80211_registered_device, 332 event_work); 333 334 guard(wiphy)(&rdev->wiphy); 335 336 cfg80211_process_rdev_events(rdev); 337 } 338 339 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 340 { 341 struct wireless_dev *wdev, *tmp; 342 343 ASSERT_RTNL(); 344 345 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 346 if (wdev->nl_owner_dead) { 347 if (wdev->netdev) 348 dev_close(wdev->netdev); 349 350 guard(wiphy)(&rdev->wiphy); 351 352 cfg80211_leave(rdev, wdev, -1); 353 cfg80211_remove_virtual_intf(rdev, wdev); 354 } 355 } 356 } 357 358 static void cfg80211_destroy_iface_wk(struct work_struct *work) 359 { 360 struct cfg80211_registered_device *rdev; 361 362 rdev = container_of(work, struct cfg80211_registered_device, 363 destroy_work); 364 365 rtnl_lock(); 366 cfg80211_destroy_ifaces(rdev); 367 rtnl_unlock(); 368 } 369 370 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, 371 struct wiphy_work *work) 372 { 373 struct cfg80211_registered_device *rdev; 374 struct cfg80211_sched_scan_request *req, *tmp; 375 376 rdev = container_of(work, struct cfg80211_registered_device, 377 sched_scan_stop_wk); 378 379 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 380 if (req->nl_owner_dead) 381 cfg80211_stop_sched_scan_req(rdev, req, false); 382 } 383 } 384 385 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 386 { 387 struct cfg80211_registered_device *rdev; 388 389 rdev = container_of(work, struct cfg80211_registered_device, 390 propagate_radar_detect_wk); 391 392 rtnl_lock(); 393 394 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 395 NL80211_DFS_UNAVAILABLE, 396 NL80211_RADAR_DETECTED); 397 398 rtnl_unlock(); 399 } 400 401 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 402 { 403 struct cfg80211_registered_device *rdev; 404 405 rdev = container_of(work, struct cfg80211_registered_device, 406 propagate_cac_done_wk); 407 408 rtnl_lock(); 409 410 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 411 NL80211_DFS_AVAILABLE, 412 NL80211_RADAR_CAC_FINISHED); 413 414 rtnl_unlock(); 415 } 416 417 static void cfg80211_wiphy_work(struct work_struct *work) 418 { 419 struct cfg80211_registered_device *rdev; 420 struct wiphy_work *wk; 421 422 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); 423 424 trace_wiphy_work_worker_start(&rdev->wiphy); 425 426 guard(wiphy)(&rdev->wiphy); 427 if (rdev->suspended) 428 return; 429 430 spin_lock_irq(&rdev->wiphy_work_lock); 431 wk = list_first_entry_or_null(&rdev->wiphy_work_list, 432 struct wiphy_work, entry); 433 if (wk) { 434 list_del_init(&wk->entry); 435 if (!list_empty(&rdev->wiphy_work_list)) 436 queue_work(system_dfl_wq, work); 437 spin_unlock_irq(&rdev->wiphy_work_lock); 438 439 trace_wiphy_work_run(&rdev->wiphy, wk); 440 wk->func(&rdev->wiphy, wk); 441 } else { 442 spin_unlock_irq(&rdev->wiphy_work_lock); 443 } 444 } 445 446 /* exported functions */ 447 448 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 449 const char *requested_name) 450 { 451 static atomic_t wiphy_counter = ATOMIC_INIT(0); 452 453 struct cfg80211_registered_device *rdev; 454 int alloc_size; 455 456 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 457 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 458 WARN_ON(ops->connect && !ops->disconnect); 459 WARN_ON(ops->join_ibss && !ops->leave_ibss); 460 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 461 WARN_ON(ops->add_station && !ops->del_station); 462 WARN_ON(ops->add_mpath && !ops->del_mpath); 463 WARN_ON(ops->join_mesh && !ops->leave_mesh); 464 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 465 WARN_ON(ops->start_ap && !ops->stop_ap); 466 WARN_ON(ops->join_ocb && !ops->leave_ocb); 467 WARN_ON(ops->suspend && !ops->resume); 468 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 469 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 470 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 471 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 472 473 alloc_size = sizeof(*rdev) + sizeof_priv; 474 475 rdev = kzalloc(alloc_size, GFP_KERNEL); 476 if (!rdev) 477 return NULL; 478 479 rdev->ops = ops; 480 481 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 482 483 if (unlikely(rdev->wiphy_idx < 0)) { 484 /* ugh, wrapped! */ 485 atomic_dec(&wiphy_counter); 486 kfree(rdev); 487 return NULL; 488 } 489 490 /* atomic_inc_return makes it start at 1, make it start at 0 */ 491 rdev->wiphy_idx--; 492 493 /* give it a proper name */ 494 if (requested_name && requested_name[0]) { 495 int rv; 496 497 rtnl_lock(); 498 rv = cfg80211_dev_check_name(rdev, requested_name); 499 500 if (rv < 0) { 501 rtnl_unlock(); 502 goto use_default_name; 503 } 504 505 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 506 rtnl_unlock(); 507 if (rv) 508 goto use_default_name; 509 } else { 510 int rv; 511 512 use_default_name: 513 /* NOTE: This is *probably* safe w/out holding rtnl because of 514 * the restrictions on phy names. Probably this call could 515 * fail if some other part of the kernel (re)named a device 516 * phyX. But, might should add some locking and check return 517 * value, and use a different name if this one exists? 518 */ 519 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 520 if (rv < 0) { 521 kfree(rdev); 522 return NULL; 523 } 524 } 525 526 mutex_init(&rdev->wiphy.mtx); 527 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 528 INIT_LIST_HEAD(&rdev->beacon_registrations); 529 spin_lock_init(&rdev->beacon_registrations_lock); 530 spin_lock_init(&rdev->bss_lock); 531 INIT_LIST_HEAD(&rdev->bss_list); 532 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 533 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); 534 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 535 cfg80211_dfs_channels_update_work); 536 #ifdef CONFIG_CFG80211_WEXT 537 rdev->wiphy.wext = &cfg80211_wext_handler; 538 #endif 539 540 device_initialize(&rdev->wiphy.dev); 541 rdev->wiphy.dev.class = &ieee80211_class; 542 rdev->wiphy.dev.platform_data = rdev; 543 device_enable_async_suspend(&rdev->wiphy.dev); 544 545 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 546 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 547 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 548 INIT_WORK(&rdev->propagate_radar_detect_wk, 549 cfg80211_propagate_radar_detect_wk); 550 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 551 INIT_WORK(&rdev->mgmt_registrations_update_wk, 552 cfg80211_mgmt_registrations_update_wk); 553 spin_lock_init(&rdev->mgmt_registrations_lock); 554 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); 555 INIT_LIST_HEAD(&rdev->wiphy_work_list); 556 spin_lock_init(&rdev->wiphy_work_lock); 557 558 #ifdef CONFIG_CFG80211_DEFAULT_PS 559 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 560 #endif 561 562 wiphy_net_set(&rdev->wiphy, &init_net); 563 564 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 565 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 566 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 567 &rdev->rfkill_ops, rdev); 568 569 if (!rdev->wiphy.rfkill) { 570 wiphy_free(&rdev->wiphy); 571 return NULL; 572 } 573 574 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 575 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 576 INIT_WORK(&rdev->event_work, cfg80211_event_work); 577 INIT_WORK(&rdev->background_cac_abort_wk, 578 cfg80211_background_cac_abort_wk); 579 INIT_DELAYED_WORK(&rdev->background_cac_done_wk, 580 cfg80211_background_cac_done_wk); 581 582 init_waitqueue_head(&rdev->dev_wait); 583 584 /* 585 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 586 * Fragmentation and RTS threshold are disabled by default with the 587 * special -1 value. 588 */ 589 rdev->wiphy.retry_short = 7; 590 rdev->wiphy.retry_long = 4; 591 rdev->wiphy.frag_threshold = (u32) -1; 592 rdev->wiphy.rts_threshold = (u32) -1; 593 rdev->wiphy.coverage_class = 0; 594 595 rdev->wiphy.max_num_csa_counters = 1; 596 597 rdev->wiphy.max_sched_scan_plans = 1; 598 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 599 600 return &rdev->wiphy; 601 } 602 EXPORT_SYMBOL(wiphy_new_nm); 603 604 static 605 int wiphy_verify_iface_combinations(struct wiphy *wiphy, 606 const struct ieee80211_iface_combination *iface_comb, 607 int n_iface_comb, 608 bool combined_radio) 609 { 610 const struct ieee80211_iface_combination *c; 611 int i, j; 612 613 for (i = 0; i < n_iface_comb; i++) { 614 u32 cnt = 0; 615 u16 all_iftypes = 0; 616 617 c = &iface_comb[i]; 618 619 /* 620 * Combinations with just one interface aren't real, 621 * however we make an exception for DFS. 622 */ 623 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 624 return -EINVAL; 625 626 /* Need at least one channel */ 627 if (WARN_ON(!c->num_different_channels)) 628 return -EINVAL; 629 630 /* DFS only works on one channel. Avoid this check 631 * for multi-radio global combination, since it hold 632 * the capabilities of all radio combinations. 633 */ 634 if (!combined_radio && 635 WARN_ON(c->radar_detect_widths && 636 c->num_different_channels > 1)) 637 return -EINVAL; 638 639 if (WARN_ON(!c->n_limits)) 640 return -EINVAL; 641 642 for (j = 0; j < c->n_limits; j++) { 643 u16 types = c->limits[j].types; 644 645 /* interface types shouldn't overlap */ 646 if (WARN_ON(types & all_iftypes)) 647 return -EINVAL; 648 all_iftypes |= types; 649 650 if (WARN_ON(!c->limits[j].max)) 651 return -EINVAL; 652 653 /* Shouldn't list software iftypes in combinations! */ 654 if (WARN_ON(wiphy->software_iftypes & types)) 655 return -EINVAL; 656 657 /* Only a single P2P_DEVICE can be allowed, avoid this 658 * check for multi-radio global combination, since it 659 * hold the capabilities of all radio combinations. 660 */ 661 if (!combined_radio && 662 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 663 c->limits[j].max > 1)) 664 return -EINVAL; 665 666 /* Only a single NAN can be allowed */ 667 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 668 c->limits[j].max > 1)) 669 return -EINVAL; 670 671 /* 672 * This isn't well-defined right now. If you have an 673 * IBSS interface, then its beacon interval may change 674 * by joining other networks, and nothing prevents it 675 * from doing that. 676 * So technically we probably shouldn't even allow AP 677 * and IBSS in the same interface, but it seems that 678 * some drivers support that, possibly only with fixed 679 * beacon intervals for IBSS. 680 */ 681 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 682 c->beacon_int_min_gcd)) { 683 return -EINVAL; 684 } 685 686 cnt += c->limits[j].max; 687 /* 688 * Don't advertise an unsupported type 689 * in a combination. 690 */ 691 if (WARN_ON((wiphy->interface_modes & types) != types)) 692 return -EINVAL; 693 } 694 695 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 696 return -EINVAL; 697 698 /* You can't even choose that many! */ 699 if (WARN_ON(cnt < c->max_interfaces)) 700 return -EINVAL; 701 } 702 703 return 0; 704 } 705 706 static int wiphy_verify_combinations(struct wiphy *wiphy) 707 { 708 int i, ret; 709 bool combined_radio = false; 710 711 if (wiphy->n_radio) { 712 for (i = 0; i < wiphy->n_radio; i++) { 713 const struct wiphy_radio *radio = &wiphy->radio[i]; 714 715 ret = wiphy_verify_iface_combinations(wiphy, 716 radio->iface_combinations, 717 radio->n_iface_combinations, 718 false); 719 if (ret) 720 return ret; 721 } 722 723 combined_radio = true; 724 } 725 726 ret = wiphy_verify_iface_combinations(wiphy, 727 wiphy->iface_combinations, 728 wiphy->n_iface_combinations, 729 combined_radio); 730 731 return ret; 732 } 733 734 int wiphy_register(struct wiphy *wiphy) 735 { 736 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 737 int res; 738 enum nl80211_band band; 739 struct ieee80211_supported_band *sband; 740 bool have_band = false; 741 int i; 742 u16 ifmodes = wiphy->interface_modes; 743 744 #ifdef CONFIG_PM 745 if (WARN_ON(wiphy->wowlan && 746 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 747 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 748 return -EINVAL; 749 if (WARN_ON(wiphy->wowlan && 750 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 751 !wiphy->wowlan->tcp)) 752 return -EINVAL; 753 #endif 754 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 755 (!rdev->ops->tdls_channel_switch || 756 !rdev->ops->tdls_cancel_channel_switch))) 757 return -EINVAL; 758 759 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 760 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 761 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 762 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 763 return -EINVAL; 764 765 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 766 return -EINVAL; 767 768 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 769 return -EINVAL; 770 771 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 772 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 773 !wiphy->pmsr_capa->ftm.non_asap)) 774 return -EINVAL; 775 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 776 !wiphy->pmsr_capa->ftm.bandwidths)) 777 return -EINVAL; 778 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 779 ~(BIT(NL80211_PREAMBLE_LEGACY) | 780 BIT(NL80211_PREAMBLE_HT) | 781 BIT(NL80211_PREAMBLE_VHT) | 782 BIT(NL80211_PREAMBLE_HE) | 783 BIT(NL80211_PREAMBLE_DMG)))) 784 return -EINVAL; 785 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 786 wiphy->pmsr_capa->ftm.non_trigger_based) && 787 !(wiphy->pmsr_capa->ftm.preambles & 788 BIT(NL80211_PREAMBLE_HE)))) 789 return -EINVAL; 790 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 791 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 792 BIT(NL80211_CHAN_WIDTH_20) | 793 BIT(NL80211_CHAN_WIDTH_40) | 794 BIT(NL80211_CHAN_WIDTH_80) | 795 BIT(NL80211_CHAN_WIDTH_80P80) | 796 BIT(NL80211_CHAN_WIDTH_160) | 797 BIT(NL80211_CHAN_WIDTH_320) | 798 BIT(NL80211_CHAN_WIDTH_5) | 799 BIT(NL80211_CHAN_WIDTH_10)))) 800 return -EINVAL; 801 } 802 803 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 804 (wiphy->regulatory_flags & 805 (REGULATORY_CUSTOM_REG | 806 REGULATORY_STRICT_REG | 807 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 808 REGULATORY_COUNTRY_IE_IGNORE)))) 809 return -EINVAL; 810 811 if (WARN_ON(wiphy->coalesce && 812 (!wiphy->coalesce->n_rules || 813 !wiphy->coalesce->n_patterns) && 814 (!wiphy->coalesce->pattern_min_len || 815 wiphy->coalesce->pattern_min_len > 816 wiphy->coalesce->pattern_max_len))) 817 return -EINVAL; 818 819 if (WARN_ON(wiphy->ap_sme_capa && 820 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 821 return -EINVAL; 822 823 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 824 return -EINVAL; 825 826 if (WARN_ON(wiphy->addresses && 827 !is_zero_ether_addr(wiphy->perm_addr) && 828 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 829 ETH_ALEN))) 830 return -EINVAL; 831 832 if (WARN_ON(wiphy->max_acl_mac_addrs && 833 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 834 !rdev->ops->set_mac_acl))) 835 return -EINVAL; 836 837 /* assure only valid behaviours are flagged by driver 838 * hence subtract 2 as bit 0 is invalid. 839 */ 840 if (WARN_ON(wiphy->bss_select_support && 841 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 842 return -EINVAL; 843 844 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 845 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 846 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 847 return -EINVAL; 848 849 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 850 rdev->ops->update_connect_params)) 851 return -EINVAL; 852 853 if (wiphy->addresses) 854 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 855 856 /* sanity check ifmodes */ 857 WARN_ON(!ifmodes); 858 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 859 if (WARN_ON(ifmodes != wiphy->interface_modes)) 860 wiphy->interface_modes = ifmodes; 861 862 res = wiphy_verify_combinations(wiphy); 863 if (res) 864 return res; 865 866 /* sanity check supported bands/channels */ 867 for (band = 0; band < NUM_NL80211_BANDS; band++) { 868 const struct ieee80211_sband_iftype_data *iftd; 869 u16 types = 0; 870 bool have_he = false; 871 872 sband = wiphy->bands[band]; 873 if (!sband) 874 continue; 875 876 sband->band = band; 877 if (WARN_ON(!sband->n_channels)) 878 return -EINVAL; 879 /* 880 * on 60GHz or sub-1Ghz band, there are no legacy rates, so 881 * n_bitrates is 0 882 */ 883 if (WARN_ON((band != NL80211_BAND_60GHZ && 884 band != NL80211_BAND_S1GHZ) && 885 !sband->n_bitrates)) 886 return -EINVAL; 887 888 if (WARN_ON(band == NL80211_BAND_6GHZ && 889 (sband->ht_cap.ht_supported || 890 sband->vht_cap.vht_supported))) 891 return -EINVAL; 892 893 /* 894 * Since cfg80211_disable_40mhz_24ghz is global, we can 895 * modify the sband's ht data even if the driver uses a 896 * global structure for that. 897 */ 898 if (cfg80211_disable_40mhz_24ghz && 899 band == NL80211_BAND_2GHZ && 900 sband->ht_cap.ht_supported) { 901 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 902 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 903 } 904 905 /* 906 * Since we use a u32 for rate bitmaps in 907 * ieee80211_get_response_rate, we cannot 908 * have more than 32 legacy rates. 909 */ 910 if (WARN_ON(sband->n_bitrates > 32)) 911 return -EINVAL; 912 913 for (i = 0; i < sband->n_channels; i++) { 914 sband->channels[i].orig_flags = 915 sband->channels[i].flags; 916 sband->channels[i].orig_mag = INT_MAX; 917 sband->channels[i].orig_mpwr = 918 sband->channels[i].max_power; 919 sband->channels[i].band = band; 920 921 if (WARN_ON(sband->channels[i].freq_offset >= 1000)) 922 return -EINVAL; 923 } 924 925 for_each_sband_iftype_data(sband, i, iftd) { 926 bool has_ap, has_non_ap; 927 u32 ap_bits = BIT(NL80211_IFTYPE_AP) | 928 BIT(NL80211_IFTYPE_P2P_GO); 929 930 if (WARN_ON(!iftd->types_mask)) 931 return -EINVAL; 932 if (WARN_ON(types & iftd->types_mask)) 933 return -EINVAL; 934 935 /* at least one piece of information must be present */ 936 if (WARN_ON(!iftd->he_cap.has_he)) 937 return -EINVAL; 938 939 types |= iftd->types_mask; 940 941 if (i == 0) 942 have_he = iftd->he_cap.has_he; 943 else 944 have_he = have_he && 945 iftd->he_cap.has_he; 946 947 has_ap = iftd->types_mask & ap_bits; 948 has_non_ap = iftd->types_mask & ~ap_bits; 949 950 /* 951 * For EHT 20 MHz STA, the capabilities format differs 952 * but to simplify, don't check 20 MHz but rather check 953 * only if AP and non-AP were mentioned at the same time, 954 * reject if so. 955 */ 956 if (WARN_ON(iftd->eht_cap.has_eht && 957 has_ap && has_non_ap)) 958 return -EINVAL; 959 } 960 961 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) 962 return -EINVAL; 963 964 have_band = true; 965 } 966 967 if (!have_band) { 968 WARN_ON(1); 969 return -EINVAL; 970 } 971 972 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 973 /* 974 * Validate we have a policy (can be explicitly set to 975 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 976 * we have at least one of doit/dumpit. 977 */ 978 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 979 return -EINVAL; 980 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 981 !rdev->wiphy.vendor_commands[i].dumpit)) 982 return -EINVAL; 983 } 984 985 #ifdef CONFIG_PM 986 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 987 (!rdev->wiphy.wowlan->pattern_min_len || 988 rdev->wiphy.wowlan->pattern_min_len > 989 rdev->wiphy.wowlan->pattern_max_len))) 990 return -EINVAL; 991 #endif 992 993 if (!wiphy->max_num_akm_suites) 994 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; 995 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || 996 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) 997 return -EINVAL; 998 999 /* Allocate radio configuration space for multi-radio wiphy */ 1000 if (wiphy->n_radio > 0) { 1001 int idx; 1002 1003 wiphy->radio_cfg = kcalloc(wiphy->n_radio, 1004 sizeof(*wiphy->radio_cfg), 1005 GFP_KERNEL); 1006 if (!wiphy->radio_cfg) 1007 return -ENOMEM; 1008 /* 1009 * Initialize wiphy radio parameters to IEEE 802.11 1010 * MIB default values. RTS threshold is disabled by 1011 * default with the special -1 value. 1012 */ 1013 for (idx = 0; idx < wiphy->n_radio; idx++) 1014 wiphy->radio_cfg[idx].rts_threshold = (u32)-1; 1015 } 1016 1017 /* check and set up bitrates */ 1018 ieee80211_set_bitrate_flags(wiphy); 1019 1020 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 1021 1022 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) 1023 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; 1024 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) 1025 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; 1026 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) 1027 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; 1028 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) 1029 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS; 1030 1031 rtnl_lock(); 1032 wiphy_lock(&rdev->wiphy); 1033 res = device_add(&rdev->wiphy.dev); 1034 if (res) { 1035 wiphy_unlock(&rdev->wiphy); 1036 rtnl_unlock(); 1037 return res; 1038 } 1039 1040 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 1041 cfg80211_rdev_list_generation++; 1042 1043 /* add to debugfs */ 1044 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 1045 ieee80211_debugfs_dir); 1046 if (wiphy->n_radio > 0) { 1047 int idx; 1048 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN]; 1049 1050 for (idx = 0; idx < wiphy->n_radio; idx++) { 1051 scnprintf(radio_name, sizeof(radio_name), "radio%d", 1052 idx); 1053 wiphy->radio_cfg[idx].radio_debugfsdir = 1054 debugfs_create_dir(radio_name, 1055 rdev->wiphy.debugfsdir); 1056 } 1057 } 1058 1059 cfg80211_debugfs_rdev_add(rdev); 1060 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 1061 wiphy_unlock(&rdev->wiphy); 1062 1063 /* set up regulatory info */ 1064 wiphy_regulatory_register(wiphy); 1065 1066 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1067 struct regulatory_request request = { 1068 .wiphy_idx = get_wiphy_idx(wiphy), 1069 .initiator = NL80211_REGDOM_SET_BY_DRIVER, 1070 .alpha2[0] = '9', 1071 .alpha2[1] = '9', 1072 }; 1073 1074 nl80211_send_reg_change_event(&request); 1075 } 1076 1077 /* Check that nobody globally advertises any capabilities they do not 1078 * advertise on all possible interface types. 1079 */ 1080 if (wiphy->extended_capabilities_len && 1081 wiphy->num_iftype_ext_capab && 1082 wiphy->iftype_ext_capab) { 1083 u8 supported_on_all, j; 1084 const struct wiphy_iftype_ext_capab *capab; 1085 1086 capab = wiphy->iftype_ext_capab; 1087 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 1088 if (capab[0].extended_capabilities_len > j) 1089 supported_on_all = 1090 capab[0].extended_capabilities[j]; 1091 else 1092 supported_on_all = 0x00; 1093 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 1094 if (j >= capab[i].extended_capabilities_len) { 1095 supported_on_all = 0x00; 1096 break; 1097 } 1098 supported_on_all &= 1099 capab[i].extended_capabilities[j]; 1100 } 1101 if (WARN_ON(wiphy->extended_capabilities[j] & 1102 ~supported_on_all)) 1103 break; 1104 } 1105 } 1106 1107 rdev->wiphy.registered = true; 1108 rtnl_unlock(); 1109 1110 res = rfkill_register(rdev->wiphy.rfkill); 1111 if (res) { 1112 rfkill_destroy(rdev->wiphy.rfkill); 1113 rdev->wiphy.rfkill = NULL; 1114 wiphy_unregister(&rdev->wiphy); 1115 return res; 1116 } 1117 1118 return 0; 1119 } 1120 EXPORT_SYMBOL(wiphy_register); 1121 1122 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 1123 { 1124 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1125 1126 if (!rdev->ops->rfkill_poll) 1127 return; 1128 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 1129 rfkill_resume_polling(wiphy->rfkill); 1130 } 1131 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 1132 1133 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 1134 struct wiphy_work *end) 1135 { 1136 unsigned int runaway_limit = 100; 1137 unsigned long flags; 1138 1139 lockdep_assert_held(&rdev->wiphy.mtx); 1140 1141 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1142 while (!list_empty(&rdev->wiphy_work_list)) { 1143 struct wiphy_work *wk; 1144 1145 wk = list_first_entry(&rdev->wiphy_work_list, 1146 struct wiphy_work, entry); 1147 list_del_init(&wk->entry); 1148 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1149 1150 trace_wiphy_work_run(&rdev->wiphy, wk); 1151 wk->func(&rdev->wiphy, wk); 1152 1153 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1154 1155 if (wk == end) 1156 break; 1157 1158 if (WARN_ON(--runaway_limit == 0)) 1159 INIT_LIST_HEAD(&rdev->wiphy_work_list); 1160 } 1161 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1162 } 1163 1164 void wiphy_unregister(struct wiphy *wiphy) 1165 { 1166 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1167 1168 wait_event(rdev->dev_wait, ({ 1169 int __count; 1170 wiphy_lock(&rdev->wiphy); 1171 __count = rdev->opencount; 1172 wiphy_unlock(&rdev->wiphy); 1173 __count == 0; })); 1174 1175 if (rdev->wiphy.rfkill) 1176 rfkill_unregister(rdev->wiphy.rfkill); 1177 1178 rtnl_lock(); 1179 wiphy_lock(&rdev->wiphy); 1180 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1181 rdev->wiphy.registered = false; 1182 1183 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1184 1185 /* 1186 * First remove the hardware from everywhere, this makes 1187 * it impossible to find from userspace. 1188 */ 1189 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1190 list_del_rcu(&rdev->list); 1191 synchronize_rcu(); 1192 1193 /* 1194 * If this device got a regulatory hint tell core its 1195 * free to listen now to a new shiny device regulatory hint 1196 */ 1197 wiphy_regulatory_deregister(wiphy); 1198 1199 cfg80211_rdev_list_generation++; 1200 device_del(&rdev->wiphy.dev); 1201 1202 #ifdef CONFIG_PM 1203 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1204 rdev_set_wakeup(rdev, false); 1205 #endif 1206 1207 /* surely nothing is reachable now, clean up work */ 1208 cfg80211_process_wiphy_works(rdev, NULL); 1209 wiphy_unlock(&rdev->wiphy); 1210 rtnl_unlock(); 1211 1212 /* this has nothing to do now but make sure it's gone */ 1213 cancel_work_sync(&rdev->wiphy_work); 1214 1215 cancel_work_sync(&rdev->conn_work); 1216 flush_work(&rdev->event_work); 1217 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1218 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1219 flush_work(&rdev->destroy_work); 1220 flush_work(&rdev->propagate_radar_detect_wk); 1221 flush_work(&rdev->propagate_cac_done_wk); 1222 flush_work(&rdev->mgmt_registrations_update_wk); 1223 flush_work(&rdev->background_cac_abort_wk); 1224 1225 cfg80211_rdev_free_wowlan(rdev); 1226 cfg80211_free_coalesce(rdev->coalesce); 1227 rdev->coalesce = NULL; 1228 } 1229 EXPORT_SYMBOL(wiphy_unregister); 1230 1231 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1232 { 1233 struct cfg80211_internal_bss *scan, *tmp; 1234 struct cfg80211_beacon_registration *reg, *treg; 1235 unsigned long flags; 1236 1237 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1238 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1239 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1240 cancel_work_sync(&rdev->wiphy_work); 1241 1242 rfkill_destroy(rdev->wiphy.rfkill); 1243 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1244 list_del(®->list); 1245 kfree(reg); 1246 } 1247 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1248 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1249 mutex_destroy(&rdev->wiphy.mtx); 1250 1251 /* 1252 * The 'regd' can only be non-NULL if we never finished 1253 * initializing the wiphy and thus never went through the 1254 * unregister path - e.g. in failure scenarios. Thus, it 1255 * cannot have been visible to anyone if non-NULL, so we 1256 * can just free it here. 1257 */ 1258 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1259 1260 kfree(rdev); 1261 } 1262 1263 void wiphy_free(struct wiphy *wiphy) 1264 { 1265 kfree(wiphy->radio_cfg); 1266 put_device(&wiphy->dev); 1267 } 1268 EXPORT_SYMBOL(wiphy_free); 1269 1270 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1271 enum rfkill_hard_block_reasons reason) 1272 { 1273 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1274 1275 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1276 schedule_work(&rdev->rfkill_block); 1277 } 1278 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1279 1280 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1281 bool unregister_netdev) 1282 { 1283 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1284 struct cfg80211_cqm_config *cqm_config; 1285 unsigned int link_id; 1286 1287 ASSERT_RTNL(); 1288 lockdep_assert_held(&rdev->wiphy.mtx); 1289 1290 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1291 1292 wdev->registered = false; 1293 1294 if (wdev->netdev) { 1295 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1296 if (unregister_netdev) 1297 unregister_netdevice(wdev->netdev); 1298 } 1299 1300 list_del_rcu(&wdev->list); 1301 synchronize_net(); 1302 rdev->devlist_generation++; 1303 1304 cfg80211_mlme_purge_registrations(wdev); 1305 1306 switch (wdev->iftype) { 1307 case NL80211_IFTYPE_P2P_DEVICE: 1308 cfg80211_stop_p2p_device(rdev, wdev); 1309 break; 1310 case NL80211_IFTYPE_NAN: 1311 cfg80211_stop_nan(rdev, wdev); 1312 break; 1313 default: 1314 break; 1315 } 1316 1317 #ifdef CONFIG_CFG80211_WEXT 1318 kfree_sensitive(wdev->wext.keys); 1319 wdev->wext.keys = NULL; 1320 #endif 1321 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1322 /* deleted from the list, so can't be found from nl80211 any more */ 1323 cqm_config = rcu_access_pointer(wdev->cqm_config); 1324 kfree_rcu(cqm_config, rcu_head); 1325 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1326 1327 /* 1328 * Ensure that all events have been processed and 1329 * freed. 1330 */ 1331 cfg80211_process_wdev_events(wdev); 1332 1333 if (wdev->iftype == NL80211_IFTYPE_STATION || 1334 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1335 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1336 struct cfg80211_internal_bss *curbss; 1337 1338 curbss = wdev->links[link_id].client.current_bss; 1339 1340 if (WARN_ON(curbss)) { 1341 cfg80211_unhold_bss(curbss); 1342 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1343 wdev->links[link_id].client.current_bss = NULL; 1344 } 1345 } 1346 } 1347 1348 wdev->connected = false; 1349 } 1350 1351 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1352 { 1353 _cfg80211_unregister_wdev(wdev, true); 1354 } 1355 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1356 1357 static const struct device_type wiphy_type = { 1358 .name = "wlan", 1359 }; 1360 1361 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1362 enum nl80211_iftype iftype, int num) 1363 { 1364 lockdep_assert_held(&rdev->wiphy.mtx); 1365 1366 rdev->num_running_ifaces += num; 1367 if (iftype == NL80211_IFTYPE_MONITOR) 1368 rdev->num_running_monitor_ifaces += num; 1369 } 1370 1371 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1372 struct wireless_dev *wdev, 1373 int link_id) 1374 { 1375 struct net_device *dev = wdev->netdev; 1376 struct cfg80211_sched_scan_request *pos, *tmp; 1377 1378 lockdep_assert_held(&rdev->wiphy.mtx); 1379 1380 cfg80211_pmsr_wdev_down(wdev); 1381 1382 cfg80211_stop_radar_detection(wdev); 1383 cfg80211_stop_background_radar_detection(wdev); 1384 1385 switch (wdev->iftype) { 1386 case NL80211_IFTYPE_ADHOC: 1387 cfg80211_leave_ibss(rdev, dev, true); 1388 break; 1389 case NL80211_IFTYPE_P2P_CLIENT: 1390 case NL80211_IFTYPE_STATION: 1391 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1392 list) { 1393 if (dev == pos->dev) 1394 cfg80211_stop_sched_scan_req(rdev, pos, false); 1395 } 1396 1397 #ifdef CONFIG_CFG80211_WEXT 1398 kfree(wdev->wext.ie); 1399 wdev->wext.ie = NULL; 1400 wdev->wext.ie_len = 0; 1401 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1402 #endif 1403 cfg80211_disconnect(rdev, dev, 1404 WLAN_REASON_DEAUTH_LEAVING, true); 1405 break; 1406 case NL80211_IFTYPE_MESH_POINT: 1407 cfg80211_leave_mesh(rdev, dev); 1408 break; 1409 case NL80211_IFTYPE_AP: 1410 case NL80211_IFTYPE_P2P_GO: 1411 cfg80211_stop_ap(rdev, dev, link_id, true); 1412 break; 1413 case NL80211_IFTYPE_OCB: 1414 cfg80211_leave_ocb(rdev, dev); 1415 break; 1416 case NL80211_IFTYPE_P2P_DEVICE: 1417 cfg80211_stop_p2p_device(rdev, wdev); 1418 break; 1419 case NL80211_IFTYPE_NAN: 1420 cfg80211_stop_nan(rdev, wdev); 1421 break; 1422 case NL80211_IFTYPE_AP_VLAN: 1423 case NL80211_IFTYPE_MONITOR: 1424 /* nothing to do */ 1425 break; 1426 case NL80211_IFTYPE_UNSPECIFIED: 1427 case NL80211_IFTYPE_WDS: 1428 case NUM_NL80211_IFTYPES: 1429 /* invalid */ 1430 break; 1431 } 1432 } 1433 1434 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1435 int link_id, gfp_t gfp) 1436 { 1437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1438 struct cfg80211_event *ev; 1439 unsigned long flags; 1440 1441 /* Only AP/GO interfaces may have a specific link_id */ 1442 if (WARN_ON_ONCE(link_id != -1 && 1443 wdev->iftype != NL80211_IFTYPE_AP && 1444 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1445 link_id = -1; 1446 1447 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1448 1449 ev = kzalloc(sizeof(*ev), gfp); 1450 if (!ev) 1451 return; 1452 1453 ev->type = EVENT_STOPPED; 1454 ev->link_id = link_id; 1455 1456 spin_lock_irqsave(&wdev->event_lock, flags); 1457 list_add_tail(&ev->list, &wdev->event_list); 1458 spin_unlock_irqrestore(&wdev->event_lock, flags); 1459 queue_work(cfg80211_wq, &rdev->event_work); 1460 } 1461 EXPORT_SYMBOL(cfg80211_stop_link); 1462 1463 void cfg80211_init_wdev(struct wireless_dev *wdev) 1464 { 1465 INIT_LIST_HEAD(&wdev->event_list); 1466 spin_lock_init(&wdev->event_lock); 1467 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1468 INIT_LIST_HEAD(&wdev->pmsr_list); 1469 spin_lock_init(&wdev->pmsr_lock); 1470 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1471 1472 #ifdef CONFIG_CFG80211_WEXT 1473 wdev->wext.default_key = -1; 1474 wdev->wext.default_mgmt_key = -1; 1475 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1476 #endif 1477 1478 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1479 1480 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1481 wdev->ps = true; 1482 else 1483 wdev->ps = false; 1484 /* allow mac80211 to determine the timeout */ 1485 wdev->ps_timeout = -1; 1486 1487 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1488 1489 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1490 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1491 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1492 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1493 1494 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1495 } 1496 1497 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1498 struct wireless_dev *wdev) 1499 { 1500 ASSERT_RTNL(); 1501 lockdep_assert_held(&rdev->wiphy.mtx); 1502 1503 /* 1504 * We get here also when the interface changes network namespaces, 1505 * as it's registered into the new one, but we don't want it to 1506 * change ID in that case. Checking if the ID is already assigned 1507 * works, because 0 isn't considered a valid ID and the memory is 1508 * 0-initialized. 1509 */ 1510 if (!wdev->identifier) 1511 wdev->identifier = ++rdev->wdev_id; 1512 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1513 rdev->devlist_generation++; 1514 wdev->registered = true; 1515 1516 if (wdev->netdev && 1517 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1518 "phy80211")) 1519 pr_err("failed to add phy80211 symlink to netdev!\n"); 1520 1521 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1522 } 1523 1524 int cfg80211_register_netdevice(struct net_device *dev) 1525 { 1526 struct wireless_dev *wdev = dev->ieee80211_ptr; 1527 struct cfg80211_registered_device *rdev; 1528 int ret; 1529 1530 ASSERT_RTNL(); 1531 1532 if (WARN_ON(!wdev)) 1533 return -EINVAL; 1534 1535 rdev = wiphy_to_rdev(wdev->wiphy); 1536 1537 lockdep_assert_held(&rdev->wiphy.mtx); 1538 1539 /* we'll take care of this */ 1540 wdev->registered = true; 1541 wdev->registering = true; 1542 ret = register_netdevice(dev); 1543 if (ret) 1544 goto out; 1545 1546 cfg80211_register_wdev(rdev, wdev); 1547 ret = 0; 1548 out: 1549 wdev->registering = false; 1550 if (ret) 1551 wdev->registered = false; 1552 return ret; 1553 } 1554 EXPORT_SYMBOL(cfg80211_register_netdevice); 1555 1556 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1557 unsigned long state, void *ptr) 1558 { 1559 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1560 struct wireless_dev *wdev = dev->ieee80211_ptr; 1561 struct cfg80211_registered_device *rdev; 1562 struct cfg80211_sched_scan_request *pos, *tmp; 1563 1564 if (!wdev) 1565 return NOTIFY_DONE; 1566 1567 rdev = wiphy_to_rdev(wdev->wiphy); 1568 1569 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1570 1571 switch (state) { 1572 case NETDEV_POST_INIT: 1573 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1574 wdev->netdev = dev; 1575 /* can only change netns with wiphy */ 1576 dev->netns_immutable = true; 1577 1578 cfg80211_init_wdev(wdev); 1579 break; 1580 case NETDEV_REGISTER: 1581 if (!wdev->registered) { 1582 guard(wiphy)(&rdev->wiphy); 1583 1584 cfg80211_register_wdev(rdev, wdev); 1585 } 1586 break; 1587 case NETDEV_UNREGISTER: 1588 /* 1589 * It is possible to get NETDEV_UNREGISTER multiple times, 1590 * so check wdev->registered. 1591 */ 1592 if (wdev->registered && !wdev->registering) { 1593 guard(wiphy)(&rdev->wiphy); 1594 1595 _cfg80211_unregister_wdev(wdev, false); 1596 } 1597 break; 1598 case NETDEV_GOING_DOWN: 1599 scoped_guard(wiphy, &rdev->wiphy) { 1600 cfg80211_leave(rdev, wdev, -1); 1601 cfg80211_remove_links(wdev); 1602 } 1603 /* since we just did cfg80211_leave() nothing to do there */ 1604 cancel_work_sync(&wdev->disconnect_wk); 1605 cancel_work_sync(&wdev->pmsr_free_wk); 1606 break; 1607 case NETDEV_DOWN: 1608 wiphy_lock(&rdev->wiphy); 1609 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1610 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1611 if (WARN_ON(!rdev->scan_req->notified && 1612 (!rdev->int_scan_req || 1613 !rdev->int_scan_req->notified))) 1614 rdev->scan_req->info.aborted = true; 1615 ___cfg80211_scan_done(rdev, false); 1616 } 1617 1618 list_for_each_entry_safe(pos, tmp, 1619 &rdev->sched_scan_req_list, list) { 1620 if (WARN_ON(pos->dev == wdev->netdev)) 1621 cfg80211_stop_sched_scan_req(rdev, pos, false); 1622 } 1623 1624 rdev->opencount--; 1625 wiphy_unlock(&rdev->wiphy); 1626 wake_up(&rdev->dev_wait); 1627 break; 1628 case NETDEV_UP: 1629 wiphy_lock(&rdev->wiphy); 1630 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1631 switch (wdev->iftype) { 1632 #ifdef CONFIG_CFG80211_WEXT 1633 case NL80211_IFTYPE_ADHOC: 1634 cfg80211_ibss_wext_join(rdev, wdev); 1635 break; 1636 case NL80211_IFTYPE_STATION: 1637 cfg80211_mgd_wext_connect(rdev, wdev); 1638 break; 1639 #endif 1640 #ifdef CONFIG_MAC80211_MESH 1641 case NL80211_IFTYPE_MESH_POINT: 1642 { 1643 /* backward compat code... */ 1644 struct mesh_setup setup; 1645 memcpy(&setup, &default_mesh_setup, 1646 sizeof(setup)); 1647 /* back compat only needed for mesh_id */ 1648 setup.mesh_id = wdev->u.mesh.id; 1649 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1650 if (wdev->u.mesh.id_up_len) 1651 __cfg80211_join_mesh(rdev, dev, 1652 &setup, 1653 &default_mesh_config); 1654 break; 1655 } 1656 #endif 1657 default: 1658 break; 1659 } 1660 rdev->opencount++; 1661 1662 /* 1663 * Configure power management to the driver here so that its 1664 * correctly set also after interface type changes etc. 1665 */ 1666 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1667 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1668 rdev->ops->set_power_mgmt && 1669 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1670 wdev->ps_timeout)) { 1671 /* assume this means it's off */ 1672 wdev->ps = false; 1673 } 1674 wiphy_unlock(&rdev->wiphy); 1675 break; 1676 case NETDEV_PRE_UP: 1677 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1678 wdev->use_4addr, 0)) 1679 return notifier_from_errno(-EOPNOTSUPP); 1680 1681 if (rfkill_blocked(rdev->wiphy.rfkill)) 1682 return notifier_from_errno(-ERFKILL); 1683 break; 1684 default: 1685 return NOTIFY_DONE; 1686 } 1687 1688 wireless_nlevent_flush(); 1689 1690 return NOTIFY_OK; 1691 } 1692 1693 static struct notifier_block cfg80211_netdev_notifier = { 1694 .notifier_call = cfg80211_netdev_notifier_call, 1695 }; 1696 1697 static void __net_exit cfg80211_pernet_exit(struct net *net) 1698 { 1699 struct cfg80211_registered_device *rdev; 1700 1701 rtnl_lock(); 1702 for_each_rdev(rdev) { 1703 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1704 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1705 } 1706 rtnl_unlock(); 1707 } 1708 1709 static struct pernet_operations cfg80211_pernet_ops = { 1710 .exit = cfg80211_pernet_exit, 1711 }; 1712 1713 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1714 { 1715 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1716 unsigned long flags; 1717 1718 trace_wiphy_work_queue(wiphy, work); 1719 1720 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1721 if (list_empty(&work->entry)) 1722 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1723 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1724 1725 queue_work(system_dfl_wq, &rdev->wiphy_work); 1726 } 1727 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1728 1729 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1730 { 1731 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1732 unsigned long flags; 1733 1734 lockdep_assert_held(&wiphy->mtx); 1735 1736 trace_wiphy_work_cancel(wiphy, work); 1737 1738 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1739 if (!list_empty(&work->entry)) 1740 list_del_init(&work->entry); 1741 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1742 } 1743 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 1744 1745 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 1746 { 1747 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1748 unsigned long flags; 1749 bool run; 1750 1751 trace_wiphy_work_flush(wiphy, work); 1752 1753 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1754 run = !work || !list_empty(&work->entry); 1755 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1756 1757 if (run) 1758 cfg80211_process_wiphy_works(rdev, work); 1759 } 1760 EXPORT_SYMBOL_GPL(wiphy_work_flush); 1761 1762 void wiphy_delayed_work_timer(struct timer_list *t) 1763 { 1764 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 1765 1766 wiphy_work_queue(dwork->wiphy, &dwork->work); 1767 } 1768 EXPORT_SYMBOL(wiphy_delayed_work_timer); 1769 1770 void wiphy_delayed_work_queue(struct wiphy *wiphy, 1771 struct wiphy_delayed_work *dwork, 1772 unsigned long delay) 1773 { 1774 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 1775 1776 if (!delay) { 1777 timer_delete(&dwork->timer); 1778 wiphy_work_queue(wiphy, &dwork->work); 1779 return; 1780 } 1781 1782 dwork->wiphy = wiphy; 1783 mod_timer(&dwork->timer, jiffies + delay); 1784 } 1785 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 1786 1787 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 1788 struct wiphy_delayed_work *dwork) 1789 { 1790 lockdep_assert_held(&wiphy->mtx); 1791 1792 timer_delete_sync(&dwork->timer); 1793 wiphy_work_cancel(wiphy, &dwork->work); 1794 } 1795 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 1796 1797 void wiphy_delayed_work_flush(struct wiphy *wiphy, 1798 struct wiphy_delayed_work *dwork) 1799 { 1800 lockdep_assert_held(&wiphy->mtx); 1801 1802 timer_delete_sync(&dwork->timer); 1803 wiphy_work_flush(wiphy, &dwork->work); 1804 } 1805 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 1806 1807 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 1808 struct wiphy_delayed_work *dwork) 1809 { 1810 return timer_pending(&dwork->timer); 1811 } 1812 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 1813 1814 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 1815 { 1816 struct wiphy_hrtimer_work *hrwork = 1817 container_of(t, struct wiphy_hrtimer_work, timer); 1818 1819 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 1820 1821 return HRTIMER_NORESTART; 1822 } 1823 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 1824 1825 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 1826 struct wiphy_hrtimer_work *hrwork, 1827 ktime_t delay) 1828 { 1829 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 1830 1831 if (!delay) { 1832 hrtimer_cancel(&hrwork->timer); 1833 wiphy_work_queue(wiphy, &hrwork->work); 1834 return; 1835 } 1836 1837 hrwork->wiphy = wiphy; 1838 hrtimer_start_range_ns(&hrwork->timer, delay, 1839 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 1840 } 1841 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 1842 1843 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 1844 struct wiphy_hrtimer_work *hrwork) 1845 { 1846 lockdep_assert_held(&wiphy->mtx); 1847 1848 hrtimer_cancel(&hrwork->timer); 1849 wiphy_work_cancel(wiphy, &hrwork->work); 1850 } 1851 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 1852 1853 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 1854 struct wiphy_hrtimer_work *hrwork) 1855 { 1856 lockdep_assert_held(&wiphy->mtx); 1857 1858 hrtimer_cancel(&hrwork->timer); 1859 wiphy_work_flush(wiphy, &hrwork->work); 1860 } 1861 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 1862 1863 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 1864 struct wiphy_hrtimer_work *hrwork) 1865 { 1866 return hrtimer_is_queued(&hrwork->timer); 1867 } 1868 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 1869 1870 static int __init cfg80211_init(void) 1871 { 1872 int err; 1873 1874 err = register_pernet_device(&cfg80211_pernet_ops); 1875 if (err) 1876 goto out_fail_pernet; 1877 1878 err = wiphy_sysfs_init(); 1879 if (err) 1880 goto out_fail_sysfs; 1881 1882 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1883 if (err) 1884 goto out_fail_notifier; 1885 1886 err = nl80211_init(); 1887 if (err) 1888 goto out_fail_nl80211; 1889 1890 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1891 1892 err = regulatory_init(); 1893 if (err) 1894 goto out_fail_reg; 1895 1896 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1897 if (!cfg80211_wq) { 1898 err = -ENOMEM; 1899 goto out_fail_wq; 1900 } 1901 1902 return 0; 1903 1904 out_fail_wq: 1905 regulatory_exit(); 1906 out_fail_reg: 1907 debugfs_remove(ieee80211_debugfs_dir); 1908 nl80211_exit(); 1909 out_fail_nl80211: 1910 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1911 out_fail_notifier: 1912 wiphy_sysfs_exit(); 1913 out_fail_sysfs: 1914 unregister_pernet_device(&cfg80211_pernet_ops); 1915 out_fail_pernet: 1916 return err; 1917 } 1918 fs_initcall(cfg80211_init); 1919 1920 static void __exit cfg80211_exit(void) 1921 { 1922 debugfs_remove(ieee80211_debugfs_dir); 1923 nl80211_exit(); 1924 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1925 wiphy_sysfs_exit(); 1926 regulatory_exit(); 1927 unregister_pernet_device(&cfg80211_pernet_ops); 1928 destroy_workqueue(cfg80211_wq); 1929 } 1930 module_exit(cfg80211_exit); 1931