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) 2018-2026 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 static int cfg80211_switch_wdev_netns(struct wireless_dev *wdev, 157 struct net *net) 158 { 159 int err; 160 161 if (!wdev->netdev) 162 return 0; 163 164 wdev->netdev->netns_immutable = false; 165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 166 wdev->netdev->netns_immutable = true; 167 168 return err; 169 } 170 171 static int __cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 172 struct net *net, bool force) 173 { 174 struct net *old_net = wiphy_net(&rdev->wiphy); 175 struct wireless_dev *wdev, *tmp; 176 int err = 0; 177 178 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 179 err = cfg80211_switch_wdev_netns(wdev, net); 180 if (!err) 181 continue; 182 if (!force) 183 goto undo; 184 /* remove interfaces that fail to allow wiphy switching */ 185 dev_close(wdev->netdev); 186 scoped_guard(wiphy, &rdev->wiphy) 187 cfg80211_unregister_wdev(wdev); 188 err = 0; 189 } 190 191 scoped_guard(wiphy, &rdev->wiphy) { 192 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 193 if (!wdev->netdev) 194 continue; 195 nl80211_notify_iface(rdev, wdev, 196 NL80211_CMD_DEL_INTERFACE); 197 } 198 199 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 200 201 wiphy_net_set(&rdev->wiphy, net); 202 203 /* this only fails on allocation failure */ 204 err = device_rename(&rdev->wiphy.dev, 205 dev_name(&rdev->wiphy.dev)); 206 if (err && !force) 207 wiphy_net_set(&rdev->wiphy, old_net); 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, 215 NL80211_CMD_NEW_INTERFACE); 216 } 217 } 218 219 if (!err || force) 220 return err; 221 222 /* set to the last one to undo all of them */ 223 wdev = list_entry(&rdev->wiphy.wdev_list, typeof(*wdev), list); 224 undo: 225 /* 226 * Move back everything, if this fails again (allocation failures) 227 * then things get stuck in different network namespaces. 228 */ 229 list_for_each_entry_continue_reverse(wdev, &rdev->wiphy.wdev_list, 230 list) 231 WARN_ON(cfg80211_switch_wdev_netns(wdev, old_net)); 232 233 return err; 234 } 235 236 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 237 struct net *net) 238 { 239 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 240 return -EOPNOTSUPP; 241 242 return __cfg80211_switch_netns(rdev, net, false); 243 } 244 245 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 246 { 247 struct cfg80211_registered_device *rdev = data; 248 249 guard(wiphy)(&rdev->wiphy); 250 251 rdev_rfkill_poll(rdev); 252 } 253 254 void cfg80211_stop_p2p_device(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_P2P_DEVICE)) 260 return; 261 262 if (!wdev_running(wdev)) 263 return; 264 265 cfg80211_pmsr_wdev_down(wdev); 266 rdev_stop_p2p_device(rdev, wdev); 267 wdev->is_running = false; 268 269 rdev->opencount--; 270 271 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 272 if (!rdev->scan_req->notified && 273 (!rdev->int_scan_req || !rdev->int_scan_req->notified)) 274 rdev->scan_req->info.aborted = true; 275 ___cfg80211_scan_done(rdev, false); 276 } 277 } 278 279 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 280 struct wireless_dev *wdev) 281 { 282 struct cfg80211_nan_local_sched empty_sched = {}; 283 284 lockdep_assert_held(&rdev->wiphy.mtx); 285 286 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 287 return; 288 289 if (!wdev_running(wdev)) 290 return; 291 292 cfg80211_pmsr_wdev_down(wdev); 293 294 /* 295 * If there is a scheduled update pending, mark it as canceled, so the 296 * empty schedule will be accepted 297 */ 298 wdev->u.nan.sched_update_pending = false; 299 300 /* Unschedule all */ 301 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched); 302 303 rdev_stop_nan(rdev, wdev); 304 wdev->is_running = false; 305 306 eth_zero_addr(wdev->u.nan.cluster_id); 307 308 rdev->opencount--; 309 } 310 311 int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev, 312 struct wireless_dev *wdev, 313 struct cfg80211_nan_local_sched *sched) 314 { 315 struct cfg80211_chan_def *chandefs = NULL, *old_chandefs; 316 u8 old_n_channels; 317 int ret; 318 319 lockdep_assert_held(&rdev->wiphy.mtx); 320 321 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) 322 return -EINVAL; 323 324 if (wdev->u.nan.sched_update_pending) 325 return -EBUSY; 326 327 /* 328 * Pre-allocate chandefs, so we don't ruin the current 329 * schedule on allocation failure. 330 */ 331 if (sched->n_channels) { 332 chandefs = kcalloc(sched->n_channels, sizeof(*chandefs), 333 GFP_KERNEL); 334 if (!chandefs) 335 return -ENOMEM; 336 337 for (int i = 0; i < sched->n_channels; i++) 338 chandefs[i] = sched->nan_channels[i].chandef; 339 } 340 341 /* 342 * Swap in the new chandefs before calling the driver and set the 343 * deferred flag, so if the driver completes the update synchronously 344 * the new schedule will be already in place. 345 */ 346 old_chandefs = wdev->u.nan.chandefs; 347 old_n_channels = wdev->u.nan.n_channels; 348 wdev->u.nan.chandefs = chandefs; 349 wdev->u.nan.n_channels = sched->n_channels; 350 wdev->u.nan.sched_update_pending = sched->deferred; 351 352 ret = rdev_nan_set_local_sched(rdev, wdev, sched); 353 if (ret) { 354 /* Restore the previous schedule on failure */ 355 wdev->u.nan.sched_update_pending = false; 356 wdev->u.nan.chandefs = old_chandefs; 357 wdev->u.nan.n_channels = old_n_channels; 358 kfree(chandefs); 359 return ret; 360 } 361 362 kfree(old_chandefs); 363 364 return 0; 365 } 366 367 int cfg80211_nan_set_non_evac_channels(struct cfg80211_registered_device *rdev, 368 struct wireless_dev *wdev, 369 struct cfg80211_nan_non_evac_channels *channels) 370 { 371 lockdep_assert_held(&rdev->wiphy.mtx); 372 373 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) 374 return -EINVAL; 375 376 /* 377 * Don't allow updating the non-evacuable channels while a deferred 378 * schedule update is pending, as the set of channels may still change. 379 */ 380 if (wdev->u.nan.sched_update_pending) 381 return -EBUSY; 382 383 /* All provided channels must belong to the current local schedule. */ 384 for (int i = 0; i < channels->n_channels; i++) { 385 bool found = false; 386 387 for (int j = 0; j < wdev->u.nan.n_channels; j++) { 388 if (cfg80211_chandef_identical(&wdev->u.nan.chandefs[j], 389 &channels->chandefs[i])) { 390 found = true; 391 break; 392 } 393 } 394 395 if (!found) 396 return -ENOENT; 397 } 398 399 return rdev_nan_set_non_evac_channels(rdev, wdev, channels); 400 } 401 402 void cfg80211_stop_pd(struct cfg80211_registered_device *rdev, 403 struct wireless_dev *wdev) 404 { 405 lockdep_assert_held(&rdev->wiphy.mtx); 406 407 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD)) 408 return; 409 410 if (!rdev->ops->stop_pd) 411 return; 412 413 if (!wdev_running(wdev)) 414 return; 415 416 cfg80211_pmsr_wdev_down(wdev); 417 418 rdev_stop_pd(rdev, wdev); 419 wdev->is_running = false; 420 421 rdev->opencount--; 422 } 423 424 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 425 { 426 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 427 struct wireless_dev *wdev; 428 429 ASSERT_RTNL(); 430 431 /* 432 * Some netdev interfaces need to be closed before some non-netdev 433 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN 434 * interface 435 */ 436 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 437 if (wdev->netdev) { 438 dev_close(wdev->netdev); 439 continue; 440 } 441 } 442 443 guard(wiphy)(wiphy); 444 445 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 446 switch (wdev->iftype) { 447 case NL80211_IFTYPE_P2P_DEVICE: 448 cfg80211_stop_p2p_device(rdev, wdev); 449 break; 450 case NL80211_IFTYPE_NAN: 451 cfg80211_stop_nan(rdev, wdev); 452 break; 453 case NL80211_IFTYPE_PD: 454 cfg80211_stop_pd(rdev, wdev); 455 break; 456 default: 457 break; 458 } 459 } 460 } 461 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 462 463 static int cfg80211_rfkill_set_block(void *data, bool blocked) 464 { 465 struct cfg80211_registered_device *rdev = data; 466 467 if (!blocked) 468 return 0; 469 470 rtnl_lock(); 471 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 472 rtnl_unlock(); 473 474 return 0; 475 } 476 477 static void cfg80211_rfkill_block_work(struct work_struct *work) 478 { 479 struct cfg80211_registered_device *rdev; 480 481 rdev = container_of(work, struct cfg80211_registered_device, 482 rfkill_block); 483 cfg80211_rfkill_set_block(rdev, true); 484 } 485 486 static void cfg80211_event_work(struct work_struct *work) 487 { 488 struct cfg80211_registered_device *rdev; 489 490 rdev = container_of(work, struct cfg80211_registered_device, 491 event_work); 492 493 guard(wiphy)(&rdev->wiphy); 494 495 cfg80211_process_rdev_events(rdev); 496 } 497 498 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 499 { 500 struct wireless_dev *wdev, *tmp; 501 502 ASSERT_RTNL(); 503 504 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 505 if (wdev->nl_owner_dead) { 506 cfg80211_close_dependents(rdev, wdev); 507 508 if (wdev->netdev) 509 dev_close(wdev->netdev); 510 511 guard(wiphy)(&rdev->wiphy); 512 513 cfg80211_remove_virtual_intf(rdev, wdev); 514 } 515 } 516 } 517 518 void cfg80211_close_dependents(struct cfg80211_registered_device *rdev, 519 struct wireless_dev *wdev) 520 { 521 ASSERT_RTNL(); 522 523 if (wdev->iftype != NL80211_IFTYPE_NAN) 524 return; 525 526 /* Close all NAN DATA interfaces */ 527 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 528 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) 529 dev_close(wdev->netdev); 530 } 531 } 532 533 static void cfg80211_destroy_iface_wk(struct work_struct *work) 534 { 535 struct cfg80211_registered_device *rdev; 536 537 rdev = container_of(work, struct cfg80211_registered_device, 538 destroy_work); 539 540 rtnl_lock(); 541 cfg80211_destroy_ifaces(rdev); 542 rtnl_unlock(); 543 } 544 545 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, 546 struct wiphy_work *work) 547 { 548 struct cfg80211_registered_device *rdev; 549 struct cfg80211_sched_scan_request *req, *tmp; 550 551 rdev = container_of(work, struct cfg80211_registered_device, 552 sched_scan_stop_wk); 553 554 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 555 if (req->nl_owner_dead) 556 cfg80211_stop_sched_scan_req(rdev, req, false); 557 } 558 } 559 560 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 561 { 562 struct cfg80211_registered_device *rdev; 563 564 rdev = container_of(work, struct cfg80211_registered_device, 565 propagate_radar_detect_wk); 566 567 rtnl_lock(); 568 569 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 570 NL80211_DFS_UNAVAILABLE, 571 NL80211_RADAR_DETECTED); 572 573 rtnl_unlock(); 574 } 575 576 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 577 { 578 struct cfg80211_registered_device *rdev; 579 580 rdev = container_of(work, struct cfg80211_registered_device, 581 propagate_cac_done_wk); 582 583 rtnl_lock(); 584 585 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 586 NL80211_DFS_AVAILABLE, 587 NL80211_RADAR_CAC_FINISHED); 588 589 rtnl_unlock(); 590 } 591 592 static void cfg80211_wiphy_work(struct work_struct *work) 593 { 594 struct cfg80211_registered_device *rdev; 595 struct wiphy_work *wk; 596 597 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); 598 599 trace_wiphy_work_worker_start(&rdev->wiphy); 600 601 guard(wiphy)(&rdev->wiphy); 602 if (rdev->suspended) 603 return; 604 605 spin_lock_irq(&rdev->wiphy_work_lock); 606 wk = list_first_entry_or_null(&rdev->wiphy_work_list, 607 struct wiphy_work, entry); 608 if (wk) { 609 list_del_init(&wk->entry); 610 if (!list_empty(&rdev->wiphy_work_list)) 611 queue_work(system_dfl_wq, work); 612 spin_unlock_irq(&rdev->wiphy_work_lock); 613 614 trace_wiphy_work_run(&rdev->wiphy, wk); 615 wk->func(&rdev->wiphy, wk); 616 } else { 617 spin_unlock_irq(&rdev->wiphy_work_lock); 618 } 619 } 620 621 /* exported functions */ 622 623 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 624 const char *requested_name) 625 { 626 static atomic_t wiphy_counter = ATOMIC_INIT(0); 627 628 struct cfg80211_registered_device *rdev; 629 int alloc_size; 630 631 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 632 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 633 WARN_ON(ops->connect && !ops->disconnect); 634 WARN_ON(ops->join_ibss && !ops->leave_ibss); 635 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 636 WARN_ON(ops->add_station && !ops->del_station); 637 WARN_ON(ops->add_mpath && !ops->del_mpath); 638 WARN_ON(ops->join_mesh && !ops->leave_mesh); 639 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 640 WARN_ON(ops->start_ap && !ops->stop_ap); 641 WARN_ON(ops->join_ocb && !ops->leave_ocb); 642 WARN_ON(ops->suspend && !ops->resume); 643 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 644 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 645 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 646 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 647 648 alloc_size = sizeof(*rdev) + sizeof_priv; 649 650 rdev = kzalloc(alloc_size, GFP_KERNEL); 651 if (!rdev) 652 return NULL; 653 654 rdev->ops = ops; 655 656 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 657 658 if (unlikely(rdev->wiphy_idx < 0)) { 659 /* ugh, wrapped! */ 660 atomic_dec(&wiphy_counter); 661 kfree(rdev); 662 return NULL; 663 } 664 665 /* atomic_inc_return makes it start at 1, make it start at 0 */ 666 rdev->wiphy_idx--; 667 668 /* give it a proper name */ 669 if (requested_name && requested_name[0]) { 670 int rv; 671 672 rtnl_lock(); 673 rv = cfg80211_dev_check_name(rdev, requested_name); 674 675 if (rv < 0) { 676 rtnl_unlock(); 677 goto use_default_name; 678 } 679 680 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 681 rtnl_unlock(); 682 if (rv) 683 goto use_default_name; 684 } else { 685 int rv; 686 687 use_default_name: 688 /* NOTE: This is *probably* safe w/out holding rtnl because of 689 * the restrictions on phy names. Probably this call could 690 * fail if some other part of the kernel (re)named a device 691 * phyX. But, might should add some locking and check return 692 * value, and use a different name if this one exists? 693 */ 694 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 695 if (rv < 0) { 696 kfree(rdev); 697 return NULL; 698 } 699 } 700 701 mutex_init(&rdev->wiphy.mtx); 702 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 703 INIT_LIST_HEAD(&rdev->beacon_registrations); 704 spin_lock_init(&rdev->beacon_registrations_lock); 705 spin_lock_init(&rdev->bss_lock); 706 INIT_LIST_HEAD(&rdev->bss_list); 707 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 708 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); 709 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 710 cfg80211_dfs_channels_update_work); 711 #ifdef CONFIG_CFG80211_WEXT 712 rdev->wiphy.wext = &cfg80211_wext_handler; 713 #endif 714 715 device_initialize(&rdev->wiphy.dev); 716 rdev->wiphy.dev.class = &ieee80211_class; 717 rdev->wiphy.dev.platform_data = rdev; 718 device_enable_async_suspend(&rdev->wiphy.dev); 719 720 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 721 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 722 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 723 wiphy_work_init(&rdev->reg_check_chans_wk, reg_leave_invalid_chans_wk); 724 INIT_WORK(&rdev->reg_leave_nan_wk, reg_leave_invalid_nan_wk); 725 INIT_WORK(&rdev->propagate_radar_detect_wk, 726 cfg80211_propagate_radar_detect_wk); 727 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 728 INIT_WORK(&rdev->mgmt_registrations_update_wk, 729 cfg80211_mgmt_registrations_update_wk); 730 spin_lock_init(&rdev->mgmt_registrations_lock); 731 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); 732 INIT_LIST_HEAD(&rdev->wiphy_work_list); 733 spin_lock_init(&rdev->wiphy_work_lock); 734 735 #ifdef CONFIG_CFG80211_DEFAULT_PS 736 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 737 #endif 738 739 wiphy_net_set(&rdev->wiphy, &init_net); 740 741 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 742 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 743 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 744 &rdev->rfkill_ops, rdev); 745 746 if (!rdev->wiphy.rfkill) { 747 wiphy_free(&rdev->wiphy); 748 return NULL; 749 } 750 751 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 752 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 753 INIT_WORK(&rdev->event_work, cfg80211_event_work); 754 INIT_WORK(&rdev->background_cac_abort_wk, 755 cfg80211_background_cac_abort_wk); 756 INIT_DELAYED_WORK(&rdev->background_cac_done_wk, 757 cfg80211_background_cac_done_wk); 758 759 init_waitqueue_head(&rdev->dev_wait); 760 761 /* 762 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 763 * Fragmentation and RTS threshold are disabled by default with the 764 * special -1 value. 765 */ 766 rdev->wiphy.retry_short = 7; 767 rdev->wiphy.retry_long = 4; 768 rdev->wiphy.frag_threshold = (u32) -1; 769 rdev->wiphy.rts_threshold = (u32) -1; 770 rdev->wiphy.coverage_class = 0; 771 772 rdev->wiphy.max_num_csa_counters = 1; 773 774 rdev->wiphy.max_sched_scan_plans = 1; 775 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 776 777 return &rdev->wiphy; 778 } 779 EXPORT_SYMBOL(wiphy_new_nm); 780 781 static 782 int wiphy_verify_iface_combinations(struct wiphy *wiphy, 783 const struct ieee80211_iface_combination *iface_comb, 784 int n_iface_comb, 785 bool combined_radio) 786 { 787 const struct ieee80211_iface_combination *c; 788 int i, j; 789 790 for (i = 0; i < n_iface_comb; i++) { 791 u32 cnt = 0; 792 u16 all_iftypes = 0; 793 794 c = &iface_comb[i]; 795 796 /* 797 * Combinations with just one interface aren't real, 798 * however we make an exception for DFS. 799 */ 800 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 801 return -EINVAL; 802 803 /* Need at least one channel */ 804 if (WARN_ON(!c->num_different_channels)) 805 return -EINVAL; 806 807 /* DFS only works on one channel. Avoid this check 808 * for multi-radio global combination, since it hold 809 * the capabilities of all radio combinations. 810 */ 811 if (!combined_radio && 812 WARN_ON(c->radar_detect_widths && 813 c->num_different_channels > 1)) 814 return -EINVAL; 815 816 if (WARN_ON(!c->n_limits)) 817 return -EINVAL; 818 819 for (j = 0; j < c->n_limits; j++) { 820 u16 types = c->limits[j].types; 821 822 /* interface types shouldn't overlap */ 823 if (WARN_ON(types & all_iftypes)) 824 return -EINVAL; 825 all_iftypes |= types; 826 827 if (WARN_ON(!c->limits[j].max)) 828 return -EINVAL; 829 830 /* Shouldn't list software iftypes in combinations! */ 831 if (WARN_ON(wiphy->software_iftypes & types)) 832 return -EINVAL; 833 834 /* Only a single P2P_DEVICE can be allowed, avoid this 835 * check for multi-radio global combination, since it 836 * hold the capabilities of all radio combinations. 837 */ 838 if (!combined_radio && 839 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 840 c->limits[j].max > 1)) 841 return -EINVAL; 842 843 /* Only a single NAN can be allowed */ 844 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 845 c->limits[j].max > 1)) 846 return -EINVAL; 847 848 /* 849 * This isn't well-defined right now. If you have an 850 * IBSS interface, then its beacon interval may change 851 * by joining other networks, and nothing prevents it 852 * from doing that. 853 * So technically we probably shouldn't even allow AP 854 * and IBSS in the same interface, but it seems that 855 * some drivers support that, possibly only with fixed 856 * beacon intervals for IBSS. 857 */ 858 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 859 c->beacon_int_min_gcd)) { 860 return -EINVAL; 861 } 862 863 cnt += c->limits[j].max; 864 /* 865 * Don't advertise an unsupported type 866 * in a combination. 867 */ 868 if (WARN_ON((wiphy->interface_modes & types) != types)) 869 return -EINVAL; 870 } 871 872 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 873 return -EINVAL; 874 875 /* You can't even choose that many! */ 876 if (WARN_ON(cnt < c->max_interfaces)) 877 return -EINVAL; 878 } 879 880 return 0; 881 } 882 883 static int wiphy_verify_combinations(struct wiphy *wiphy) 884 { 885 int i, ret; 886 bool combined_radio = false; 887 888 if (wiphy->n_radio) { 889 for (i = 0; i < wiphy->n_radio; i++) { 890 const struct wiphy_radio *radio = &wiphy->radio[i]; 891 892 ret = wiphy_verify_iface_combinations(wiphy, 893 radio->iface_combinations, 894 radio->n_iface_combinations, 895 false); 896 if (ret) 897 return ret; 898 } 899 900 combined_radio = true; 901 } 902 903 ret = wiphy_verify_iface_combinations(wiphy, 904 wiphy->iface_combinations, 905 wiphy->n_iface_combinations, 906 combined_radio); 907 908 return ret; 909 } 910 911 static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy) 912 { 913 int i, j; 914 915 if (wiphy->n_cipher_suites && !wiphy->cipher_suites) 916 return false; 917 918 for (i = 0; i < wiphy->n_cipher_suites; i++) { 919 for (j = 0; j < i; j++) { 920 if (wiphy->cipher_suites[i] == 921 wiphy->cipher_suites[j]) 922 return false; 923 } 924 } 925 926 return true; 927 } 928 929 int wiphy_register(struct wiphy *wiphy) 930 { 931 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 932 int res; 933 enum nl80211_band band; 934 struct ieee80211_supported_band *sband; 935 bool have_band = false; 936 int i; 937 u16 ifmodes = wiphy->interface_modes; 938 939 #ifdef CONFIG_PM 940 if (WARN_ON(wiphy->wowlan && 941 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 942 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 943 return -EINVAL; 944 if (WARN_ON(wiphy->wowlan && 945 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 946 !wiphy->wowlan->tcp)) 947 return -EINVAL; 948 #endif 949 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 950 (!rdev->ops->tdls_channel_switch || 951 !rdev->ops->tdls_cancel_channel_switch))) 952 return -EINVAL; 953 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) && 954 (!rdev->ops->start_pd || !rdev->ops->stop_pd))) 955 return -EINVAL; 956 957 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 958 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 959 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 960 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 961 return -EINVAL; 962 963 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) && 964 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1))) 965 return -EINVAL; 966 967 if (WARN_ON((wiphy->nan_capa.flags & WIPHY_NAN_FLAGS_INSTANT_COMM) && 968 !(wiphy->nan_capa.flags & 969 WIPHY_NAN_FLAGS_CONFIGURABLE_SYNC))) 970 return -EINVAL; 971 972 /* Instant Communication requires user space to track NAN beacons */ 973 if (WARN_ON((wiphy->nan_capa.flags & WIPHY_NAN_FLAGS_INSTANT_COMM) && 974 (!wiphy->mgmt_stypes || 975 !(wiphy->mgmt_stypes[NL80211_IFTYPE_NAN].rx & 976 BIT(IEEE80211_STYPE_BEACON >> 4))))) 977 return -EINVAL; 978 979 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 980 return -EINVAL; 981 982 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 983 return -EINVAL; 984 985 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 986 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 987 !wiphy->pmsr_capa->ftm.non_asap)) 988 return -EINVAL; 989 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 990 !wiphy->pmsr_capa->ftm.bandwidths)) 991 return -EINVAL; 992 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 993 ~(BIT(NL80211_PREAMBLE_LEGACY) | 994 BIT(NL80211_PREAMBLE_HT) | 995 BIT(NL80211_PREAMBLE_VHT) | 996 BIT(NL80211_PREAMBLE_HE) | 997 BIT(NL80211_PREAMBLE_DMG)))) 998 return -EINVAL; 999 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 1000 wiphy->pmsr_capa->ftm.non_trigger_based) && 1001 !(wiphy->pmsr_capa->ftm.preambles & 1002 BIT(NL80211_PREAMBLE_HE)))) 1003 return -EINVAL; 1004 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 1005 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 1006 BIT(NL80211_CHAN_WIDTH_20) | 1007 BIT(NL80211_CHAN_WIDTH_40) | 1008 BIT(NL80211_CHAN_WIDTH_80) | 1009 BIT(NL80211_CHAN_WIDTH_80P80) | 1010 BIT(NL80211_CHAN_WIDTH_160) | 1011 BIT(NL80211_CHAN_WIDTH_320)))) 1012 return -EINVAL; 1013 } 1014 1015 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 1016 (wiphy->regulatory_flags & 1017 (REGULATORY_CUSTOM_REG | 1018 REGULATORY_STRICT_REG | 1019 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 1020 REGULATORY_COUNTRY_IE_IGNORE)))) 1021 return -EINVAL; 1022 1023 if (WARN_ON(wiphy->coalesce && 1024 (!wiphy->coalesce->n_rules || 1025 !wiphy->coalesce->n_patterns) && 1026 (!wiphy->coalesce->pattern_min_len || 1027 wiphy->coalesce->pattern_min_len > 1028 wiphy->coalesce->pattern_max_len))) 1029 return -EINVAL; 1030 1031 if (WARN_ON(wiphy->ap_sme_capa && 1032 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 1033 return -EINVAL; 1034 1035 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 1036 return -EINVAL; 1037 1038 if (WARN_ON(wiphy->addresses && 1039 !is_zero_ether_addr(wiphy->perm_addr) && 1040 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 1041 ETH_ALEN))) 1042 return -EINVAL; 1043 1044 if (WARN_ON(wiphy->max_acl_mac_addrs && 1045 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 1046 !rdev->ops->set_mac_acl))) 1047 return -EINVAL; 1048 1049 /* assure only valid behaviours are flagged by driver 1050 * hence subtract 2 as bit 0 is invalid. 1051 */ 1052 if (WARN_ON(wiphy->bss_select_support && 1053 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 1054 return -EINVAL; 1055 1056 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 1057 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 1058 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 1059 return -EINVAL; 1060 1061 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 1062 rdev->ops->update_connect_params)) 1063 return -EINVAL; 1064 1065 if (wiphy->addresses) 1066 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 1067 1068 /* sanity check ifmodes */ 1069 WARN_ON(!ifmodes); 1070 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 1071 if (WARN_ON(ifmodes != wiphy->interface_modes)) 1072 wiphy->interface_modes = ifmodes; 1073 1074 res = wiphy_verify_combinations(wiphy); 1075 if (res) 1076 return res; 1077 1078 if (!wiphy_cipher_suites_valid(wiphy)) 1079 return -EINVAL; 1080 1081 /* sanity check supported bands/channels */ 1082 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1083 const struct ieee80211_sband_iftype_data *iftd; 1084 u16 types = 0; 1085 bool have_he = false; 1086 1087 sband = wiphy->bands[band]; 1088 if (!sband) 1089 continue; 1090 1091 sband->band = band; 1092 if (WARN_ON(!sband->n_channels)) 1093 return -EINVAL; 1094 /* 1095 * on 60GHz or sub-1Ghz band, there are no legacy rates, so 1096 * n_bitrates is 0 1097 */ 1098 if (WARN_ON((band != NL80211_BAND_60GHZ && 1099 band != NL80211_BAND_S1GHZ) && 1100 !sband->n_bitrates)) 1101 return -EINVAL; 1102 1103 if (WARN_ON(band == NL80211_BAND_6GHZ && 1104 (sband->ht_cap.ht_supported || 1105 sband->vht_cap.vht_supported))) 1106 return -EINVAL; 1107 1108 /* 1109 * Since cfg80211_disable_40mhz_24ghz is global, we can 1110 * modify the sband's ht data even if the driver uses a 1111 * global structure for that. 1112 */ 1113 if (cfg80211_disable_40mhz_24ghz && 1114 band == NL80211_BAND_2GHZ && 1115 sband->ht_cap.ht_supported) { 1116 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1117 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 1118 } 1119 1120 /* 1121 * Since we use a u32 for rate bitmaps in 1122 * ieee80211_get_response_rate, we cannot 1123 * have more than 32 legacy rates. 1124 */ 1125 if (WARN_ON(sband->n_bitrates > 32)) 1126 return -EINVAL; 1127 1128 for (i = 0; i < sband->n_channels; i++) { 1129 sband->channels[i].orig_flags = 1130 sband->channels[i].flags; 1131 sband->channels[i].orig_mag = INT_MAX; 1132 sband->channels[i].orig_mpwr = 1133 sband->channels[i].max_power; 1134 sband->channels[i].band = band; 1135 1136 if (WARN_ON(sband->channels[i].freq_offset >= 1000)) 1137 return -EINVAL; 1138 } 1139 1140 for_each_sband_iftype_data(sband, i, iftd) { 1141 bool has_ap, has_non_ap; 1142 u32 ap_bits = BIT(NL80211_IFTYPE_AP) | 1143 BIT(NL80211_IFTYPE_P2P_GO); 1144 1145 if (WARN_ON(!iftd->types_mask)) 1146 return -EINVAL; 1147 if (WARN_ON(types & iftd->types_mask)) 1148 return -EINVAL; 1149 1150 /* at least one piece of information must be present */ 1151 if (WARN_ON(!iftd->he_cap.has_he)) 1152 return -EINVAL; 1153 1154 types |= iftd->types_mask; 1155 1156 if (i == 0) 1157 have_he = iftd->he_cap.has_he; 1158 else 1159 have_he = have_he && 1160 iftd->he_cap.has_he; 1161 1162 has_ap = iftd->types_mask & ap_bits; 1163 has_non_ap = iftd->types_mask & ~ap_bits; 1164 1165 /* 1166 * For EHT 20 MHz STA, the capabilities format differs 1167 * but to simplify, don't check 20 MHz but rather check 1168 * only if AP and non-AP were mentioned at the same time, 1169 * reject if so. 1170 */ 1171 if (WARN_ON(iftd->eht_cap.has_eht && 1172 has_ap && has_non_ap)) 1173 return -EINVAL; 1174 } 1175 1176 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) 1177 return -EINVAL; 1178 1179 have_band = true; 1180 } 1181 1182 if (!have_band) { 1183 WARN_ON(1); 1184 return -EINVAL; 1185 } 1186 1187 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 1188 /* 1189 * Validate we have a policy (can be explicitly set to 1190 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 1191 * we have at least one of doit/dumpit. 1192 */ 1193 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 1194 return -EINVAL; 1195 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 1196 !rdev->wiphy.vendor_commands[i].dumpit)) 1197 return -EINVAL; 1198 } 1199 1200 #ifdef CONFIG_PM 1201 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 1202 (!rdev->wiphy.wowlan->pattern_min_len || 1203 rdev->wiphy.wowlan->pattern_min_len > 1204 rdev->wiphy.wowlan->pattern_max_len))) 1205 return -EINVAL; 1206 #endif 1207 1208 if (!wiphy->max_num_akm_suites) 1209 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; 1210 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || 1211 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) 1212 return -EINVAL; 1213 1214 /* Allocate radio configuration space for multi-radio wiphy */ 1215 if (wiphy->n_radio > 0) { 1216 int idx; 1217 1218 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg, 1219 wiphy->n_radio); 1220 if (!wiphy->radio_cfg) 1221 return -ENOMEM; 1222 /* 1223 * Initialize wiphy radio parameters to IEEE 802.11 1224 * MIB default values. RTS threshold is disabled by 1225 * default with the special -1 value. 1226 */ 1227 for (idx = 0; idx < wiphy->n_radio; idx++) 1228 wiphy->radio_cfg[idx].rts_threshold = (u32)-1; 1229 } 1230 1231 /* check and set up bitrates */ 1232 ieee80211_set_bitrate_flags(wiphy); 1233 1234 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 1235 1236 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) 1237 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; 1238 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) 1239 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; 1240 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) 1241 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; 1242 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) 1243 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS; 1244 1245 rtnl_lock(); 1246 wiphy_lock(&rdev->wiphy); 1247 res = device_add(&rdev->wiphy.dev); 1248 if (res) { 1249 wiphy_unlock(&rdev->wiphy); 1250 rtnl_unlock(); 1251 return res; 1252 } 1253 1254 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 1255 cfg80211_rdev_list_generation++; 1256 1257 /* add to debugfs */ 1258 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 1259 ieee80211_debugfs_dir); 1260 if (wiphy->n_radio > 0) { 1261 int idx; 1262 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN]; 1263 1264 for (idx = 0; idx < wiphy->n_radio; idx++) { 1265 scnprintf(radio_name, sizeof(radio_name), "radio%d", 1266 idx); 1267 wiphy->radio_cfg[idx].radio_debugfsdir = 1268 debugfs_create_dir(radio_name, 1269 rdev->wiphy.debugfsdir); 1270 } 1271 } 1272 1273 cfg80211_debugfs_rdev_add(rdev); 1274 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 1275 wiphy_unlock(&rdev->wiphy); 1276 1277 /* set up regulatory info */ 1278 wiphy_regulatory_register(wiphy); 1279 1280 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1281 struct regulatory_request request = { 1282 .wiphy_idx = get_wiphy_idx(wiphy), 1283 .initiator = NL80211_REGDOM_SET_BY_DRIVER, 1284 .alpha2[0] = '9', 1285 .alpha2[1] = '9', 1286 }; 1287 1288 nl80211_send_reg_change_event(&request); 1289 } 1290 1291 /* Check that nobody globally advertises any capabilities they do not 1292 * advertise on all possible interface types. 1293 */ 1294 if (wiphy->extended_capabilities_len && 1295 wiphy->num_iftype_ext_capab && 1296 wiphy->iftype_ext_capab) { 1297 u8 supported_on_all, j; 1298 const struct wiphy_iftype_ext_capab *capab; 1299 1300 capab = wiphy->iftype_ext_capab; 1301 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 1302 if (capab[0].extended_capabilities_len > j) 1303 supported_on_all = 1304 capab[0].extended_capabilities[j]; 1305 else 1306 supported_on_all = 0x00; 1307 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 1308 if (j >= capab[i].extended_capabilities_len) { 1309 supported_on_all = 0x00; 1310 break; 1311 } 1312 supported_on_all &= 1313 capab[i].extended_capabilities[j]; 1314 } 1315 if (WARN_ON(wiphy->extended_capabilities[j] & 1316 ~supported_on_all)) 1317 break; 1318 } 1319 } 1320 1321 rdev->wiphy.registered = true; 1322 rtnl_unlock(); 1323 1324 res = rfkill_register(rdev->wiphy.rfkill); 1325 if (res) { 1326 rfkill_destroy(rdev->wiphy.rfkill); 1327 rdev->wiphy.rfkill = NULL; 1328 wiphy_unregister(&rdev->wiphy); 1329 return res; 1330 } 1331 1332 return 0; 1333 } 1334 EXPORT_SYMBOL(wiphy_register); 1335 1336 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 1337 { 1338 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1339 1340 if (!rdev->ops->rfkill_poll) 1341 return; 1342 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 1343 rfkill_resume_polling(wiphy->rfkill); 1344 } 1345 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 1346 1347 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 1348 struct wiphy_work *end) 1349 { 1350 unsigned int runaway_limit = 100; 1351 unsigned long flags; 1352 1353 lockdep_assert_held(&rdev->wiphy.mtx); 1354 1355 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1356 while (!list_empty(&rdev->wiphy_work_list)) { 1357 struct wiphy_work *wk; 1358 1359 wk = list_first_entry(&rdev->wiphy_work_list, 1360 struct wiphy_work, entry); 1361 list_del_init(&wk->entry); 1362 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1363 1364 trace_wiphy_work_run(&rdev->wiphy, wk); 1365 wk->func(&rdev->wiphy, wk); 1366 1367 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1368 1369 if (wk == end) 1370 break; 1371 1372 if (WARN_ON(--runaway_limit == 0)) 1373 INIT_LIST_HEAD(&rdev->wiphy_work_list); 1374 } 1375 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1376 } 1377 1378 void wiphy_unregister(struct wiphy *wiphy) 1379 { 1380 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1381 1382 wait_event(rdev->dev_wait, ({ 1383 int __count; 1384 wiphy_lock(&rdev->wiphy); 1385 __count = rdev->opencount; 1386 wiphy_unlock(&rdev->wiphy); 1387 __count == 0; })); 1388 1389 if (rdev->wiphy.rfkill) 1390 rfkill_unregister(rdev->wiphy.rfkill); 1391 1392 rtnl_lock(); 1393 wiphy_lock(&rdev->wiphy); 1394 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1395 rdev->wiphy.registered = false; 1396 1397 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1398 1399 /* 1400 * First remove the hardware from everywhere, this makes 1401 * it impossible to find from userspace. 1402 */ 1403 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1404 list_del_rcu(&rdev->list); 1405 synchronize_rcu(); 1406 1407 /* 1408 * If this device got a regulatory hint tell core its 1409 * free to listen now to a new shiny device regulatory hint 1410 */ 1411 wiphy_regulatory_deregister(wiphy); 1412 1413 cfg80211_rdev_list_generation++; 1414 device_del(&rdev->wiphy.dev); 1415 1416 #ifdef CONFIG_PM 1417 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1418 rdev_set_wakeup(rdev, false); 1419 #endif 1420 1421 /* surely nothing is reachable now, clean up work */ 1422 cfg80211_process_wiphy_works(rdev, NULL); 1423 wiphy_unlock(&rdev->wiphy); 1424 rtnl_unlock(); 1425 1426 /* this has nothing to do now but make sure it's gone */ 1427 cancel_work_sync(&rdev->wiphy_work); 1428 1429 cancel_work_sync(&rdev->sched_scan_res_wk); 1430 cancel_work_sync(&rdev->rfkill_block); 1431 cancel_work_sync(&rdev->conn_work); 1432 flush_work(&rdev->event_work); 1433 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1434 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1435 flush_work(&rdev->destroy_work); 1436 flush_work(&rdev->reg_leave_nan_wk); 1437 flush_work(&rdev->propagate_radar_detect_wk); 1438 flush_work(&rdev->propagate_cac_done_wk); 1439 flush_work(&rdev->mgmt_registrations_update_wk); 1440 flush_work(&rdev->background_cac_abort_wk); 1441 1442 cfg80211_rdev_free_wowlan(rdev); 1443 cfg80211_free_coalesce(rdev->coalesce); 1444 rdev->coalesce = NULL; 1445 } 1446 EXPORT_SYMBOL(wiphy_unregister); 1447 1448 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1449 { 1450 struct cfg80211_internal_bss *scan, *tmp; 1451 struct cfg80211_beacon_registration *reg, *treg; 1452 unsigned long flags; 1453 1454 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1455 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1456 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1457 cancel_work_sync(&rdev->wiphy_work); 1458 1459 rfkill_destroy(rdev->wiphy.rfkill); 1460 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1461 list_del(®->list); 1462 kfree(reg); 1463 } 1464 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1465 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1466 mutex_destroy(&rdev->wiphy.mtx); 1467 1468 /* 1469 * The 'regd' can only be non-NULL if we never finished 1470 * initializing the wiphy and thus never went through the 1471 * unregister path - e.g. in failure scenarios. Thus, it 1472 * cannot have been visible to anyone if non-NULL, so we 1473 * can just free it here. 1474 */ 1475 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1476 1477 kfree(rdev); 1478 } 1479 1480 void wiphy_free(struct wiphy *wiphy) 1481 { 1482 kfree(wiphy->radio_cfg); 1483 put_device(&wiphy->dev); 1484 } 1485 EXPORT_SYMBOL(wiphy_free); 1486 1487 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1488 enum rfkill_hard_block_reasons reason) 1489 { 1490 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1491 1492 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1493 schedule_work(&rdev->rfkill_block); 1494 } 1495 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1496 1497 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1498 bool unregister_netdev) 1499 { 1500 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1501 struct cfg80211_cqm_config *cqm_config; 1502 unsigned int link_id; 1503 1504 ASSERT_RTNL(); 1505 lockdep_assert_held(&rdev->wiphy.mtx); 1506 1507 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1508 1509 wdev->registered = false; 1510 1511 if (wdev->netdev) { 1512 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1513 if (unregister_netdev) 1514 unregister_netdevice(wdev->netdev); 1515 } 1516 1517 list_del_rcu(&wdev->list); 1518 synchronize_net(); 1519 rdev->devlist_generation++; 1520 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1521 1522 cfg80211_mlme_purge_registrations(wdev); 1523 1524 switch (wdev->iftype) { 1525 case NL80211_IFTYPE_P2P_DEVICE: 1526 cfg80211_stop_p2p_device(rdev, wdev); 1527 break; 1528 case NL80211_IFTYPE_NAN: 1529 cfg80211_stop_nan(rdev, wdev); 1530 break; 1531 case NL80211_IFTYPE_PD: 1532 cfg80211_stop_pd(rdev, wdev); 1533 break; 1534 default: 1535 break; 1536 } 1537 1538 #ifdef CONFIG_CFG80211_WEXT 1539 kfree_sensitive(wdev->wext.keys); 1540 wdev->wext.keys = NULL; 1541 #endif 1542 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1543 /* deleted from the list, so can't be found from nl80211 any more */ 1544 cqm_config = rcu_access_pointer(wdev->cqm_config); 1545 kfree_rcu(cqm_config, rcu_head); 1546 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1547 1548 /* 1549 * Ensure that all events have been processed and 1550 * freed. 1551 */ 1552 cfg80211_process_wdev_events(wdev); 1553 1554 if (wdev->iftype == NL80211_IFTYPE_STATION || 1555 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1556 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1557 struct cfg80211_internal_bss *curbss; 1558 1559 curbss = wdev->links[link_id].client.current_bss; 1560 1561 if (WARN_ON(curbss)) { 1562 cfg80211_unhold_bss(curbss); 1563 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1564 wdev->links[link_id].client.current_bss = NULL; 1565 } 1566 } 1567 } 1568 1569 wdev->connected = false; 1570 } 1571 1572 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1573 { 1574 _cfg80211_unregister_wdev(wdev, true); 1575 } 1576 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1577 1578 static const struct device_type wiphy_type = { 1579 .name = "wlan", 1580 }; 1581 1582 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1583 enum nl80211_iftype iftype, int num) 1584 { 1585 lockdep_assert_held(&rdev->wiphy.mtx); 1586 1587 rdev->num_running_ifaces += num; 1588 if (iftype == NL80211_IFTYPE_MONITOR) 1589 rdev->num_running_monitor_ifaces += num; 1590 } 1591 1592 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev, 1593 struct wireless_dev *wdev, int link_id) 1594 { 1595 struct net_device *dev = wdev->netdev; 1596 struct cfg80211_sched_scan_request *pos, *tmp; 1597 1598 lockdep_assert_held(&rdev->wiphy.mtx); 1599 1600 cfg80211_pmsr_wdev_down(wdev); 1601 1602 cfg80211_stop_radar_detection(wdev); 1603 cfg80211_stop_background_radar_detection(wdev); 1604 1605 switch (wdev->iftype) { 1606 case NL80211_IFTYPE_ADHOC: 1607 cfg80211_leave_ibss(rdev, dev, true); 1608 break; 1609 case NL80211_IFTYPE_P2P_CLIENT: 1610 case NL80211_IFTYPE_STATION: 1611 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1612 list) { 1613 if (dev == pos->dev) 1614 cfg80211_stop_sched_scan_req(rdev, pos, false); 1615 } 1616 1617 #ifdef CONFIG_CFG80211_WEXT 1618 kfree(wdev->wext.ie); 1619 wdev->wext.ie = NULL; 1620 wdev->wext.ie_len = 0; 1621 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1622 #endif 1623 cfg80211_disconnect(rdev, dev, 1624 WLAN_REASON_DEAUTH_LEAVING, true); 1625 break; 1626 case NL80211_IFTYPE_MESH_POINT: 1627 cfg80211_leave_mesh(rdev, dev); 1628 break; 1629 case NL80211_IFTYPE_AP: 1630 case NL80211_IFTYPE_P2P_GO: 1631 cfg80211_stop_ap(rdev, dev, link_id, true); 1632 break; 1633 case NL80211_IFTYPE_OCB: 1634 cfg80211_leave_ocb(rdev, dev); 1635 break; 1636 case NL80211_IFTYPE_P2P_DEVICE: 1637 cfg80211_stop_p2p_device(rdev, wdev); 1638 break; 1639 case NL80211_IFTYPE_NAN: 1640 cfg80211_stop_nan(rdev, wdev); 1641 break; 1642 case NL80211_IFTYPE_PD: 1643 cfg80211_stop_pd(rdev, wdev); 1644 break; 1645 case NL80211_IFTYPE_AP_VLAN: 1646 case NL80211_IFTYPE_MONITOR: 1647 case NL80211_IFTYPE_NAN_DATA: 1648 /* nothing to do */ 1649 break; 1650 case NL80211_IFTYPE_UNSPECIFIED: 1651 case NL80211_IFTYPE_WDS: 1652 case NUM_NL80211_IFTYPES: 1653 /* invalid */ 1654 break; 1655 } 1656 } 1657 1658 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1659 struct wireless_dev *wdev, int link_id) 1660 { 1661 ASSERT_RTNL(); 1662 1663 /* NAN_DATA interfaces must be closed before stopping NAN */ 1664 cfg80211_close_dependents(rdev, wdev); 1665 1666 guard(wiphy)(&rdev->wiphy); 1667 1668 cfg80211_leave_locked(rdev, wdev, link_id); 1669 } 1670 1671 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1672 int link_id, gfp_t gfp) 1673 { 1674 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1675 struct cfg80211_event *ev; 1676 unsigned long flags; 1677 1678 /* Only AP/GO interfaces may have a specific link_id */ 1679 if (WARN_ON_ONCE(link_id != -1 && 1680 wdev->iftype != NL80211_IFTYPE_AP && 1681 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1682 link_id = -1; 1683 1684 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1685 1686 if (wdev->iftype == NL80211_IFTYPE_NAN) 1687 return; 1688 1689 ev = kzalloc_obj(*ev, gfp); 1690 if (!ev) 1691 return; 1692 1693 ev->type = EVENT_STOPPED; 1694 ev->link_id = link_id; 1695 1696 spin_lock_irqsave(&wdev->event_lock, flags); 1697 list_add_tail(&ev->list, &wdev->event_list); 1698 spin_unlock_irqrestore(&wdev->event_lock, flags); 1699 queue_work(cfg80211_wq, &rdev->event_work); 1700 } 1701 EXPORT_SYMBOL(cfg80211_stop_link); 1702 1703 void cfg80211_init_wdev(struct wireless_dev *wdev) 1704 { 1705 INIT_LIST_HEAD(&wdev->event_list); 1706 spin_lock_init(&wdev->event_lock); 1707 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1708 INIT_LIST_HEAD(&wdev->pmsr_list); 1709 spin_lock_init(&wdev->pmsr_lock); 1710 wiphy_work_init(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1711 1712 #ifdef CONFIG_CFG80211_WEXT 1713 wdev->wext.default_key = -1; 1714 wdev->wext.default_mgmt_key = -1; 1715 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1716 #endif 1717 1718 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1719 1720 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1721 wdev->ps = true; 1722 else 1723 wdev->ps = false; 1724 /* allow mac80211 to determine the timeout */ 1725 wdev->ps_timeout = -1; 1726 1727 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1728 1729 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1730 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1731 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1732 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1733 1734 wiphy_work_init(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1735 } 1736 1737 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1738 struct wireless_dev *wdev) 1739 { 1740 ASSERT_RTNL(); 1741 lockdep_assert_held(&rdev->wiphy.mtx); 1742 1743 /* 1744 * We get here also when the interface changes network namespaces, 1745 * as it's registered into the new one, but we don't want it to 1746 * change ID in that case. Checking if the ID is already assigned 1747 * works, because 0 isn't considered a valid ID and the memory is 1748 * 0-initialized. 1749 */ 1750 if (!wdev->identifier) 1751 wdev->identifier = ++rdev->wdev_id; 1752 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1753 rdev->devlist_generation++; 1754 wdev->registered = true; 1755 1756 if (wdev->netdev && 1757 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1758 "phy80211")) 1759 pr_err("failed to add phy80211 symlink to netdev!\n"); 1760 1761 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1762 } 1763 1764 int cfg80211_register_netdevice(struct net_device *dev) 1765 { 1766 struct wireless_dev *wdev = dev->ieee80211_ptr; 1767 struct cfg80211_registered_device *rdev; 1768 int ret; 1769 1770 ASSERT_RTNL(); 1771 1772 if (WARN_ON(!wdev)) 1773 return -EINVAL; 1774 1775 rdev = wiphy_to_rdev(wdev->wiphy); 1776 1777 lockdep_assert_held(&rdev->wiphy.mtx); 1778 1779 /* we'll take care of this */ 1780 wdev->registered = true; 1781 wdev->registering = true; 1782 ret = register_netdevice(dev); 1783 if (ret) 1784 goto out; 1785 1786 cfg80211_register_wdev(rdev, wdev); 1787 ret = 0; 1788 out: 1789 wdev->registering = false; 1790 if (ret) 1791 wdev->registered = false; 1792 return ret; 1793 } 1794 EXPORT_SYMBOL(cfg80211_register_netdevice); 1795 1796 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1797 unsigned long state, void *ptr) 1798 { 1799 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1800 struct wireless_dev *wdev = dev->ieee80211_ptr; 1801 struct cfg80211_registered_device *rdev; 1802 struct cfg80211_sched_scan_request *pos, *tmp; 1803 1804 if (!wdev) 1805 return NOTIFY_DONE; 1806 1807 rdev = wiphy_to_rdev(wdev->wiphy); 1808 1809 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1810 1811 switch (state) { 1812 case NETDEV_POST_INIT: 1813 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1814 wdev->netdev = dev; 1815 /* can only change netns with wiphy */ 1816 dev->netns_immutable = true; 1817 1818 cfg80211_init_wdev(wdev); 1819 break; 1820 case NETDEV_REGISTER: 1821 if (!wdev->registered) { 1822 guard(wiphy)(&rdev->wiphy); 1823 1824 cfg80211_register_wdev(rdev, wdev); 1825 } 1826 break; 1827 case NETDEV_UNREGISTER: 1828 /* 1829 * It is possible to get NETDEV_UNREGISTER multiple times, 1830 * so check wdev->registered. 1831 */ 1832 if (wdev->registered && !wdev->registering) { 1833 guard(wiphy)(&rdev->wiphy); 1834 1835 _cfg80211_unregister_wdev(wdev, false); 1836 } 1837 break; 1838 case NETDEV_GOING_DOWN: 1839 cfg80211_leave(rdev, wdev, -1); 1840 scoped_guard(wiphy, &rdev->wiphy) { 1841 cfg80211_remove_links(wdev); 1842 /* since we just did cfg80211_leave() nothing to do there */ 1843 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1844 } 1845 break; 1846 case NETDEV_DOWN: 1847 wiphy_lock(&rdev->wiphy); 1848 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1849 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1850 if (!rdev->scan_req->notified && 1851 (!rdev->int_scan_req || 1852 !rdev->int_scan_req->notified)) 1853 rdev->scan_req->info.aborted = true; 1854 ___cfg80211_scan_done(rdev, false); 1855 } 1856 1857 list_for_each_entry_safe(pos, tmp, 1858 &rdev->sched_scan_req_list, list) { 1859 if (WARN_ON(pos->dev == wdev->netdev)) 1860 cfg80211_stop_sched_scan_req(rdev, pos, false); 1861 } 1862 1863 rdev->opencount--; 1864 wiphy_unlock(&rdev->wiphy); 1865 wake_up(&rdev->dev_wait); 1866 break; 1867 case NETDEV_UP: 1868 wiphy_lock(&rdev->wiphy); 1869 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1870 switch (wdev->iftype) { 1871 #ifdef CONFIG_CFG80211_WEXT 1872 case NL80211_IFTYPE_ADHOC: 1873 cfg80211_ibss_wext_join(rdev, wdev); 1874 break; 1875 case NL80211_IFTYPE_STATION: 1876 cfg80211_mgd_wext_connect(rdev, wdev); 1877 break; 1878 #endif 1879 #ifdef CONFIG_MAC80211_MESH 1880 case NL80211_IFTYPE_MESH_POINT: 1881 { 1882 /* backward compat code... */ 1883 struct mesh_setup setup; 1884 memcpy(&setup, &default_mesh_setup, 1885 sizeof(setup)); 1886 /* back compat only needed for mesh_id */ 1887 setup.mesh_id = wdev->u.mesh.id; 1888 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1889 if (wdev->u.mesh.id_up_len) 1890 __cfg80211_join_mesh(rdev, dev, 1891 &setup, 1892 &default_mesh_config); 1893 break; 1894 } 1895 #endif 1896 default: 1897 break; 1898 } 1899 rdev->opencount++; 1900 1901 /* 1902 * Configure power management to the driver here so that its 1903 * correctly set also after interface type changes etc. 1904 */ 1905 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1906 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1907 rdev->ops->set_power_mgmt && 1908 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1909 wdev->ps_timeout)) { 1910 /* assume this means it's off */ 1911 wdev->ps = false; 1912 } 1913 wiphy_unlock(&rdev->wiphy); 1914 break; 1915 case NETDEV_PRE_UP: 1916 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1917 wdev->use_4addr, 0)) 1918 return notifier_from_errno(-EOPNOTSUPP); 1919 1920 if (rfkill_blocked(rdev->wiphy.rfkill)) 1921 return notifier_from_errno(-ERFKILL); 1922 1923 /* NAN_DATA interfaces require a running NAN interface */ 1924 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { 1925 struct wireless_dev *iter; 1926 bool nan_started = false; 1927 1928 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { 1929 if (iter->iftype == NL80211_IFTYPE_NAN && 1930 wdev_running(iter)) { 1931 nan_started = true; 1932 break; 1933 } 1934 } 1935 1936 if (!nan_started) 1937 return notifier_from_errno(-ENOLINK); 1938 } 1939 break; 1940 default: 1941 return NOTIFY_DONE; 1942 } 1943 1944 wireless_nlevent_flush(); 1945 1946 return NOTIFY_OK; 1947 } 1948 1949 static struct notifier_block cfg80211_netdev_notifier = { 1950 .notifier_call = cfg80211_netdev_notifier_call, 1951 }; 1952 1953 static void __net_exit cfg80211_pernet_exit(struct net *net) 1954 { 1955 struct cfg80211_registered_device *rdev; 1956 1957 rtnl_lock(); 1958 for_each_rdev(rdev) { 1959 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1960 WARN_ON(__cfg80211_switch_netns(rdev, &init_net, true)); 1961 } 1962 rtnl_unlock(); 1963 } 1964 1965 static struct pernet_operations cfg80211_pernet_ops = { 1966 .exit = cfg80211_pernet_exit, 1967 }; 1968 1969 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1970 { 1971 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1972 unsigned long flags; 1973 1974 trace_wiphy_work_queue(wiphy, work); 1975 1976 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1977 if (list_empty(&work->entry)) 1978 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1979 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1980 1981 queue_work(system_dfl_wq, &rdev->wiphy_work); 1982 } 1983 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1984 1985 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1986 { 1987 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1988 unsigned long flags; 1989 1990 lockdep_assert_held(&wiphy->mtx); 1991 1992 trace_wiphy_work_cancel(wiphy, work); 1993 1994 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1995 if (!list_empty(&work->entry)) 1996 list_del_init(&work->entry); 1997 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1998 } 1999 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 2000 2001 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 2002 { 2003 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 2004 unsigned long flags; 2005 bool run; 2006 2007 trace_wiphy_work_flush(wiphy, work); 2008 2009 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 2010 run = !work || !list_empty(&work->entry); 2011 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 2012 2013 if (run) 2014 cfg80211_process_wiphy_works(rdev, work); 2015 } 2016 EXPORT_SYMBOL_GPL(wiphy_work_flush); 2017 2018 void wiphy_delayed_work_timer(struct timer_list *t) 2019 { 2020 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 2021 2022 wiphy_work_queue(dwork->wiphy, &dwork->work); 2023 } 2024 EXPORT_SYMBOL(wiphy_delayed_work_timer); 2025 2026 void wiphy_delayed_work_queue(struct wiphy *wiphy, 2027 struct wiphy_delayed_work *dwork, 2028 unsigned long delay) 2029 { 2030 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 2031 2032 if (!delay) { 2033 timer_delete(&dwork->timer); 2034 wiphy_work_queue(wiphy, &dwork->work); 2035 return; 2036 } 2037 2038 dwork->wiphy = wiphy; 2039 mod_timer(&dwork->timer, jiffies + delay); 2040 } 2041 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 2042 2043 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 2044 struct wiphy_delayed_work *dwork) 2045 { 2046 lockdep_assert_held(&wiphy->mtx); 2047 2048 timer_delete_sync(&dwork->timer); 2049 wiphy_work_cancel(wiphy, &dwork->work); 2050 } 2051 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 2052 2053 void wiphy_delayed_work_flush(struct wiphy *wiphy, 2054 struct wiphy_delayed_work *dwork) 2055 { 2056 lockdep_assert_held(&wiphy->mtx); 2057 2058 timer_delete_sync(&dwork->timer); 2059 wiphy_work_flush(wiphy, &dwork->work); 2060 } 2061 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 2062 2063 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 2064 struct wiphy_delayed_work *dwork) 2065 { 2066 return timer_pending(&dwork->timer); 2067 } 2068 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 2069 2070 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 2071 { 2072 struct wiphy_hrtimer_work *hrwork = 2073 container_of(t, struct wiphy_hrtimer_work, timer); 2074 2075 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 2076 2077 return HRTIMER_NORESTART; 2078 } 2079 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 2080 2081 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 2082 struct wiphy_hrtimer_work *hrwork, 2083 ktime_t delay) 2084 { 2085 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 2086 2087 if (!delay) { 2088 hrtimer_cancel(&hrwork->timer); 2089 wiphy_work_queue(wiphy, &hrwork->work); 2090 return; 2091 } 2092 2093 hrwork->wiphy = wiphy; 2094 hrtimer_start_range_ns(&hrwork->timer, delay, 2095 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 2096 } 2097 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 2098 2099 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 2100 struct wiphy_hrtimer_work *hrwork) 2101 { 2102 lockdep_assert_held(&wiphy->mtx); 2103 2104 hrtimer_cancel(&hrwork->timer); 2105 wiphy_work_cancel(wiphy, &hrwork->work); 2106 } 2107 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 2108 2109 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 2110 struct wiphy_hrtimer_work *hrwork) 2111 { 2112 lockdep_assert_held(&wiphy->mtx); 2113 2114 hrtimer_cancel(&hrwork->timer); 2115 wiphy_work_flush(wiphy, &hrwork->work); 2116 } 2117 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 2118 2119 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 2120 struct wiphy_hrtimer_work *hrwork) 2121 { 2122 return hrtimer_is_queued(&hrwork->timer); 2123 } 2124 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 2125 2126 static int __init cfg80211_init(void) 2127 { 2128 int err; 2129 2130 err = register_pernet_device(&cfg80211_pernet_ops); 2131 if (err) 2132 goto out_fail_pernet; 2133 2134 err = wiphy_sysfs_init(); 2135 if (err) 2136 goto out_fail_sysfs; 2137 2138 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 2139 if (err) 2140 goto out_fail_notifier; 2141 2142 err = nl80211_init(); 2143 if (err) 2144 goto out_fail_nl80211; 2145 2146 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 2147 2148 err = regulatory_init(); 2149 if (err) 2150 goto out_fail_reg; 2151 2152 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 2153 if (!cfg80211_wq) { 2154 err = -ENOMEM; 2155 goto out_fail_wq; 2156 } 2157 2158 return 0; 2159 2160 out_fail_wq: 2161 regulatory_exit(); 2162 out_fail_reg: 2163 debugfs_remove(ieee80211_debugfs_dir); 2164 nl80211_exit(); 2165 out_fail_nl80211: 2166 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2167 out_fail_notifier: 2168 wiphy_sysfs_exit(); 2169 out_fail_sysfs: 2170 unregister_pernet_device(&cfg80211_pernet_ops); 2171 out_fail_pernet: 2172 return err; 2173 } 2174 fs_initcall(cfg80211_init); 2175 2176 static void __exit cfg80211_exit(void) 2177 { 2178 debugfs_remove(ieee80211_debugfs_dir); 2179 nl80211_exit(); 2180 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2181 wiphy_sysfs_exit(); 2182 regulatory_exit(); 2183 unregister_pernet_device(&cfg80211_pernet_ops); 2184 destroy_workqueue(cfg80211_wq); 2185 } 2186 module_exit(cfg80211_exit); 2187