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->interface_modes & BIT(NL80211_IFTYPE_WDS))) 968 return -EINVAL; 969 970 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 971 return -EINVAL; 972 973 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 974 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 975 !wiphy->pmsr_capa->ftm.non_asap)) 976 return -EINVAL; 977 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 978 !wiphy->pmsr_capa->ftm.bandwidths)) 979 return -EINVAL; 980 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 981 ~(BIT(NL80211_PREAMBLE_LEGACY) | 982 BIT(NL80211_PREAMBLE_HT) | 983 BIT(NL80211_PREAMBLE_VHT) | 984 BIT(NL80211_PREAMBLE_HE) | 985 BIT(NL80211_PREAMBLE_DMG)))) 986 return -EINVAL; 987 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 988 wiphy->pmsr_capa->ftm.non_trigger_based) && 989 !(wiphy->pmsr_capa->ftm.preambles & 990 BIT(NL80211_PREAMBLE_HE)))) 991 return -EINVAL; 992 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 993 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 994 BIT(NL80211_CHAN_WIDTH_20) | 995 BIT(NL80211_CHAN_WIDTH_40) | 996 BIT(NL80211_CHAN_WIDTH_80) | 997 BIT(NL80211_CHAN_WIDTH_80P80) | 998 BIT(NL80211_CHAN_WIDTH_160) | 999 BIT(NL80211_CHAN_WIDTH_320)))) 1000 return -EINVAL; 1001 } 1002 1003 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 1004 (wiphy->regulatory_flags & 1005 (REGULATORY_CUSTOM_REG | 1006 REGULATORY_STRICT_REG | 1007 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 1008 REGULATORY_COUNTRY_IE_IGNORE)))) 1009 return -EINVAL; 1010 1011 if (WARN_ON(wiphy->coalesce && 1012 (!wiphy->coalesce->n_rules || 1013 !wiphy->coalesce->n_patterns) && 1014 (!wiphy->coalesce->pattern_min_len || 1015 wiphy->coalesce->pattern_min_len > 1016 wiphy->coalesce->pattern_max_len))) 1017 return -EINVAL; 1018 1019 if (WARN_ON(wiphy->ap_sme_capa && 1020 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 1021 return -EINVAL; 1022 1023 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 1024 return -EINVAL; 1025 1026 if (WARN_ON(wiphy->addresses && 1027 !is_zero_ether_addr(wiphy->perm_addr) && 1028 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 1029 ETH_ALEN))) 1030 return -EINVAL; 1031 1032 if (WARN_ON(wiphy->max_acl_mac_addrs && 1033 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 1034 !rdev->ops->set_mac_acl))) 1035 return -EINVAL; 1036 1037 /* assure only valid behaviours are flagged by driver 1038 * hence subtract 2 as bit 0 is invalid. 1039 */ 1040 if (WARN_ON(wiphy->bss_select_support && 1041 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 1042 return -EINVAL; 1043 1044 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 1045 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 1046 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 1047 return -EINVAL; 1048 1049 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 1050 rdev->ops->update_connect_params)) 1051 return -EINVAL; 1052 1053 if (wiphy->addresses) 1054 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 1055 1056 /* sanity check ifmodes */ 1057 WARN_ON(!ifmodes); 1058 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 1059 if (WARN_ON(ifmodes != wiphy->interface_modes)) 1060 wiphy->interface_modes = ifmodes; 1061 1062 res = wiphy_verify_combinations(wiphy); 1063 if (res) 1064 return res; 1065 1066 if (!wiphy_cipher_suites_valid(wiphy)) 1067 return -EINVAL; 1068 1069 /* sanity check supported bands/channels */ 1070 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1071 const struct ieee80211_sband_iftype_data *iftd; 1072 u16 types = 0; 1073 bool have_he = false; 1074 1075 sband = wiphy->bands[band]; 1076 if (!sband) 1077 continue; 1078 1079 sband->band = band; 1080 if (WARN_ON(!sband->n_channels)) 1081 return -EINVAL; 1082 /* 1083 * on 60GHz or sub-1Ghz band, there are no legacy rates, so 1084 * n_bitrates is 0 1085 */ 1086 if (WARN_ON((band != NL80211_BAND_60GHZ && 1087 band != NL80211_BAND_S1GHZ) && 1088 !sband->n_bitrates)) 1089 return -EINVAL; 1090 1091 if (WARN_ON(band == NL80211_BAND_6GHZ && 1092 (sband->ht_cap.ht_supported || 1093 sband->vht_cap.vht_supported))) 1094 return -EINVAL; 1095 1096 /* 1097 * Since cfg80211_disable_40mhz_24ghz is global, we can 1098 * modify the sband's ht data even if the driver uses a 1099 * global structure for that. 1100 */ 1101 if (cfg80211_disable_40mhz_24ghz && 1102 band == NL80211_BAND_2GHZ && 1103 sband->ht_cap.ht_supported) { 1104 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1105 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 1106 } 1107 1108 /* 1109 * Since we use a u32 for rate bitmaps in 1110 * ieee80211_get_response_rate, we cannot 1111 * have more than 32 legacy rates. 1112 */ 1113 if (WARN_ON(sband->n_bitrates > 32)) 1114 return -EINVAL; 1115 1116 for (i = 0; i < sband->n_channels; i++) { 1117 sband->channels[i].orig_flags = 1118 sband->channels[i].flags; 1119 sband->channels[i].orig_mag = INT_MAX; 1120 sband->channels[i].orig_mpwr = 1121 sband->channels[i].max_power; 1122 sband->channels[i].band = band; 1123 1124 if (WARN_ON(sband->channels[i].freq_offset >= 1000)) 1125 return -EINVAL; 1126 } 1127 1128 for_each_sband_iftype_data(sband, i, iftd) { 1129 bool has_ap, has_non_ap; 1130 u32 ap_bits = BIT(NL80211_IFTYPE_AP) | 1131 BIT(NL80211_IFTYPE_P2P_GO); 1132 1133 if (WARN_ON(!iftd->types_mask)) 1134 return -EINVAL; 1135 if (WARN_ON(types & iftd->types_mask)) 1136 return -EINVAL; 1137 1138 /* at least one piece of information must be present */ 1139 if (WARN_ON(!iftd->he_cap.has_he)) 1140 return -EINVAL; 1141 1142 types |= iftd->types_mask; 1143 1144 if (i == 0) 1145 have_he = iftd->he_cap.has_he; 1146 else 1147 have_he = have_he && 1148 iftd->he_cap.has_he; 1149 1150 has_ap = iftd->types_mask & ap_bits; 1151 has_non_ap = iftd->types_mask & ~ap_bits; 1152 1153 /* 1154 * For EHT 20 MHz STA, the capabilities format differs 1155 * but to simplify, don't check 20 MHz but rather check 1156 * only if AP and non-AP were mentioned at the same time, 1157 * reject if so. 1158 */ 1159 if (WARN_ON(iftd->eht_cap.has_eht && 1160 has_ap && has_non_ap)) 1161 return -EINVAL; 1162 } 1163 1164 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) 1165 return -EINVAL; 1166 1167 have_band = true; 1168 } 1169 1170 if (!have_band) { 1171 WARN_ON(1); 1172 return -EINVAL; 1173 } 1174 1175 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 1176 /* 1177 * Validate we have a policy (can be explicitly set to 1178 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 1179 * we have at least one of doit/dumpit. 1180 */ 1181 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 1182 return -EINVAL; 1183 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 1184 !rdev->wiphy.vendor_commands[i].dumpit)) 1185 return -EINVAL; 1186 } 1187 1188 #ifdef CONFIG_PM 1189 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 1190 (!rdev->wiphy.wowlan->pattern_min_len || 1191 rdev->wiphy.wowlan->pattern_min_len > 1192 rdev->wiphy.wowlan->pattern_max_len))) 1193 return -EINVAL; 1194 #endif 1195 1196 if (!wiphy->max_num_akm_suites) 1197 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; 1198 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || 1199 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) 1200 return -EINVAL; 1201 1202 /* Allocate radio configuration space for multi-radio wiphy */ 1203 if (wiphy->n_radio > 0) { 1204 int idx; 1205 1206 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg, 1207 wiphy->n_radio); 1208 if (!wiphy->radio_cfg) 1209 return -ENOMEM; 1210 /* 1211 * Initialize wiphy radio parameters to IEEE 802.11 1212 * MIB default values. RTS threshold is disabled by 1213 * default with the special -1 value. 1214 */ 1215 for (idx = 0; idx < wiphy->n_radio; idx++) 1216 wiphy->radio_cfg[idx].rts_threshold = (u32)-1; 1217 } 1218 1219 /* check and set up bitrates */ 1220 ieee80211_set_bitrate_flags(wiphy); 1221 1222 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 1223 1224 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) 1225 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; 1226 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) 1227 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; 1228 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) 1229 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; 1230 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) 1231 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS; 1232 1233 rtnl_lock(); 1234 wiphy_lock(&rdev->wiphy); 1235 res = device_add(&rdev->wiphy.dev); 1236 if (res) { 1237 wiphy_unlock(&rdev->wiphy); 1238 rtnl_unlock(); 1239 return res; 1240 } 1241 1242 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 1243 cfg80211_rdev_list_generation++; 1244 1245 /* add to debugfs */ 1246 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 1247 ieee80211_debugfs_dir); 1248 if (wiphy->n_radio > 0) { 1249 int idx; 1250 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN]; 1251 1252 for (idx = 0; idx < wiphy->n_radio; idx++) { 1253 scnprintf(radio_name, sizeof(radio_name), "radio%d", 1254 idx); 1255 wiphy->radio_cfg[idx].radio_debugfsdir = 1256 debugfs_create_dir(radio_name, 1257 rdev->wiphy.debugfsdir); 1258 } 1259 } 1260 1261 cfg80211_debugfs_rdev_add(rdev); 1262 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 1263 wiphy_unlock(&rdev->wiphy); 1264 1265 /* set up regulatory info */ 1266 wiphy_regulatory_register(wiphy); 1267 1268 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1269 struct regulatory_request request = { 1270 .wiphy_idx = get_wiphy_idx(wiphy), 1271 .initiator = NL80211_REGDOM_SET_BY_DRIVER, 1272 .alpha2[0] = '9', 1273 .alpha2[1] = '9', 1274 }; 1275 1276 nl80211_send_reg_change_event(&request); 1277 } 1278 1279 /* Check that nobody globally advertises any capabilities they do not 1280 * advertise on all possible interface types. 1281 */ 1282 if (wiphy->extended_capabilities_len && 1283 wiphy->num_iftype_ext_capab && 1284 wiphy->iftype_ext_capab) { 1285 u8 supported_on_all, j; 1286 const struct wiphy_iftype_ext_capab *capab; 1287 1288 capab = wiphy->iftype_ext_capab; 1289 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 1290 if (capab[0].extended_capabilities_len > j) 1291 supported_on_all = 1292 capab[0].extended_capabilities[j]; 1293 else 1294 supported_on_all = 0x00; 1295 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 1296 if (j >= capab[i].extended_capabilities_len) { 1297 supported_on_all = 0x00; 1298 break; 1299 } 1300 supported_on_all &= 1301 capab[i].extended_capabilities[j]; 1302 } 1303 if (WARN_ON(wiphy->extended_capabilities[j] & 1304 ~supported_on_all)) 1305 break; 1306 } 1307 } 1308 1309 rdev->wiphy.registered = true; 1310 rtnl_unlock(); 1311 1312 res = rfkill_register(rdev->wiphy.rfkill); 1313 if (res) { 1314 rfkill_destroy(rdev->wiphy.rfkill); 1315 rdev->wiphy.rfkill = NULL; 1316 wiphy_unregister(&rdev->wiphy); 1317 return res; 1318 } 1319 1320 return 0; 1321 } 1322 EXPORT_SYMBOL(wiphy_register); 1323 1324 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 1325 { 1326 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1327 1328 if (!rdev->ops->rfkill_poll) 1329 return; 1330 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 1331 rfkill_resume_polling(wiphy->rfkill); 1332 } 1333 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 1334 1335 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 1336 struct wiphy_work *end) 1337 { 1338 unsigned int runaway_limit = 100; 1339 unsigned long flags; 1340 1341 lockdep_assert_held(&rdev->wiphy.mtx); 1342 1343 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1344 while (!list_empty(&rdev->wiphy_work_list)) { 1345 struct wiphy_work *wk; 1346 1347 wk = list_first_entry(&rdev->wiphy_work_list, 1348 struct wiphy_work, entry); 1349 list_del_init(&wk->entry); 1350 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1351 1352 trace_wiphy_work_run(&rdev->wiphy, wk); 1353 wk->func(&rdev->wiphy, wk); 1354 1355 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1356 1357 if (wk == end) 1358 break; 1359 1360 if (WARN_ON(--runaway_limit == 0)) 1361 INIT_LIST_HEAD(&rdev->wiphy_work_list); 1362 } 1363 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1364 } 1365 1366 void wiphy_unregister(struct wiphy *wiphy) 1367 { 1368 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1369 1370 wait_event(rdev->dev_wait, ({ 1371 int __count; 1372 wiphy_lock(&rdev->wiphy); 1373 __count = rdev->opencount; 1374 wiphy_unlock(&rdev->wiphy); 1375 __count == 0; })); 1376 1377 if (rdev->wiphy.rfkill) 1378 rfkill_unregister(rdev->wiphy.rfkill); 1379 1380 rtnl_lock(); 1381 wiphy_lock(&rdev->wiphy); 1382 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1383 rdev->wiphy.registered = false; 1384 1385 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1386 1387 /* 1388 * First remove the hardware from everywhere, this makes 1389 * it impossible to find from userspace. 1390 */ 1391 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1392 list_del_rcu(&rdev->list); 1393 synchronize_rcu(); 1394 1395 /* 1396 * If this device got a regulatory hint tell core its 1397 * free to listen now to a new shiny device regulatory hint 1398 */ 1399 wiphy_regulatory_deregister(wiphy); 1400 1401 cfg80211_rdev_list_generation++; 1402 device_del(&rdev->wiphy.dev); 1403 1404 #ifdef CONFIG_PM 1405 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1406 rdev_set_wakeup(rdev, false); 1407 #endif 1408 1409 /* surely nothing is reachable now, clean up work */ 1410 cfg80211_process_wiphy_works(rdev, NULL); 1411 wiphy_unlock(&rdev->wiphy); 1412 rtnl_unlock(); 1413 1414 /* this has nothing to do now but make sure it's gone */ 1415 cancel_work_sync(&rdev->wiphy_work); 1416 1417 cancel_work_sync(&rdev->sched_scan_res_wk); 1418 cancel_work_sync(&rdev->rfkill_block); 1419 cancel_work_sync(&rdev->conn_work); 1420 flush_work(&rdev->event_work); 1421 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1422 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1423 flush_work(&rdev->destroy_work); 1424 flush_work(&rdev->reg_leave_nan_wk); 1425 flush_work(&rdev->propagate_radar_detect_wk); 1426 flush_work(&rdev->propagate_cac_done_wk); 1427 flush_work(&rdev->mgmt_registrations_update_wk); 1428 flush_work(&rdev->background_cac_abort_wk); 1429 1430 cfg80211_rdev_free_wowlan(rdev); 1431 cfg80211_free_coalesce(rdev->coalesce); 1432 rdev->coalesce = NULL; 1433 } 1434 EXPORT_SYMBOL(wiphy_unregister); 1435 1436 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1437 { 1438 struct cfg80211_internal_bss *scan, *tmp; 1439 struct cfg80211_beacon_registration *reg, *treg; 1440 unsigned long flags; 1441 1442 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1443 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1444 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1445 cancel_work_sync(&rdev->wiphy_work); 1446 1447 rfkill_destroy(rdev->wiphy.rfkill); 1448 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1449 list_del(®->list); 1450 kfree(reg); 1451 } 1452 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1453 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1454 mutex_destroy(&rdev->wiphy.mtx); 1455 1456 /* 1457 * The 'regd' can only be non-NULL if we never finished 1458 * initializing the wiphy and thus never went through the 1459 * unregister path - e.g. in failure scenarios. Thus, it 1460 * cannot have been visible to anyone if non-NULL, so we 1461 * can just free it here. 1462 */ 1463 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1464 1465 kfree(rdev); 1466 } 1467 1468 void wiphy_free(struct wiphy *wiphy) 1469 { 1470 kfree(wiphy->radio_cfg); 1471 put_device(&wiphy->dev); 1472 } 1473 EXPORT_SYMBOL(wiphy_free); 1474 1475 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1476 enum rfkill_hard_block_reasons reason) 1477 { 1478 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1479 1480 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1481 schedule_work(&rdev->rfkill_block); 1482 } 1483 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1484 1485 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1486 bool unregister_netdev) 1487 { 1488 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1489 struct cfg80211_cqm_config *cqm_config; 1490 unsigned int link_id; 1491 1492 ASSERT_RTNL(); 1493 lockdep_assert_held(&rdev->wiphy.mtx); 1494 1495 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1496 1497 wdev->registered = false; 1498 1499 if (wdev->netdev) { 1500 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1501 if (unregister_netdev) 1502 unregister_netdevice(wdev->netdev); 1503 } 1504 1505 list_del_rcu(&wdev->list); 1506 synchronize_net(); 1507 rdev->devlist_generation++; 1508 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1509 1510 cfg80211_mlme_purge_registrations(wdev); 1511 1512 switch (wdev->iftype) { 1513 case NL80211_IFTYPE_P2P_DEVICE: 1514 cfg80211_stop_p2p_device(rdev, wdev); 1515 break; 1516 case NL80211_IFTYPE_NAN: 1517 cfg80211_stop_nan(rdev, wdev); 1518 break; 1519 case NL80211_IFTYPE_PD: 1520 cfg80211_stop_pd(rdev, wdev); 1521 break; 1522 default: 1523 break; 1524 } 1525 1526 #ifdef CONFIG_CFG80211_WEXT 1527 kfree_sensitive(wdev->wext.keys); 1528 wdev->wext.keys = NULL; 1529 #endif 1530 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1531 /* deleted from the list, so can't be found from nl80211 any more */ 1532 cqm_config = rcu_access_pointer(wdev->cqm_config); 1533 kfree_rcu(cqm_config, rcu_head); 1534 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1535 1536 /* 1537 * Ensure that all events have been processed and 1538 * freed. 1539 */ 1540 cfg80211_process_wdev_events(wdev); 1541 1542 if (wdev->iftype == NL80211_IFTYPE_STATION || 1543 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1544 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1545 struct cfg80211_internal_bss *curbss; 1546 1547 curbss = wdev->links[link_id].client.current_bss; 1548 1549 if (WARN_ON(curbss)) { 1550 cfg80211_unhold_bss(curbss); 1551 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1552 wdev->links[link_id].client.current_bss = NULL; 1553 } 1554 } 1555 } 1556 1557 wdev->connected = false; 1558 } 1559 1560 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1561 { 1562 _cfg80211_unregister_wdev(wdev, true); 1563 } 1564 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1565 1566 static const struct device_type wiphy_type = { 1567 .name = "wlan", 1568 }; 1569 1570 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1571 enum nl80211_iftype iftype, int num) 1572 { 1573 lockdep_assert_held(&rdev->wiphy.mtx); 1574 1575 rdev->num_running_ifaces += num; 1576 if (iftype == NL80211_IFTYPE_MONITOR) 1577 rdev->num_running_monitor_ifaces += num; 1578 } 1579 1580 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev, 1581 struct wireless_dev *wdev, int link_id) 1582 { 1583 struct net_device *dev = wdev->netdev; 1584 struct cfg80211_sched_scan_request *pos, *tmp; 1585 1586 lockdep_assert_held(&rdev->wiphy.mtx); 1587 1588 cfg80211_pmsr_wdev_down(wdev); 1589 1590 cfg80211_stop_radar_detection(wdev); 1591 cfg80211_stop_background_radar_detection(wdev); 1592 1593 switch (wdev->iftype) { 1594 case NL80211_IFTYPE_ADHOC: 1595 cfg80211_leave_ibss(rdev, dev, true); 1596 break; 1597 case NL80211_IFTYPE_P2P_CLIENT: 1598 case NL80211_IFTYPE_STATION: 1599 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1600 list) { 1601 if (dev == pos->dev) 1602 cfg80211_stop_sched_scan_req(rdev, pos, false); 1603 } 1604 1605 #ifdef CONFIG_CFG80211_WEXT 1606 kfree(wdev->wext.ie); 1607 wdev->wext.ie = NULL; 1608 wdev->wext.ie_len = 0; 1609 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1610 #endif 1611 cfg80211_disconnect(rdev, dev, 1612 WLAN_REASON_DEAUTH_LEAVING, true); 1613 break; 1614 case NL80211_IFTYPE_MESH_POINT: 1615 cfg80211_leave_mesh(rdev, dev); 1616 break; 1617 case NL80211_IFTYPE_AP: 1618 case NL80211_IFTYPE_P2P_GO: 1619 cfg80211_stop_ap(rdev, dev, link_id, true); 1620 break; 1621 case NL80211_IFTYPE_OCB: 1622 cfg80211_leave_ocb(rdev, dev); 1623 break; 1624 case NL80211_IFTYPE_P2P_DEVICE: 1625 cfg80211_stop_p2p_device(rdev, wdev); 1626 break; 1627 case NL80211_IFTYPE_NAN: 1628 cfg80211_stop_nan(rdev, wdev); 1629 break; 1630 case NL80211_IFTYPE_PD: 1631 cfg80211_stop_pd(rdev, wdev); 1632 break; 1633 case NL80211_IFTYPE_AP_VLAN: 1634 case NL80211_IFTYPE_MONITOR: 1635 case NL80211_IFTYPE_NAN_DATA: 1636 /* nothing to do */ 1637 break; 1638 case NL80211_IFTYPE_UNSPECIFIED: 1639 case NL80211_IFTYPE_WDS: 1640 case NUM_NL80211_IFTYPES: 1641 /* invalid */ 1642 break; 1643 } 1644 } 1645 1646 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1647 struct wireless_dev *wdev, int link_id) 1648 { 1649 ASSERT_RTNL(); 1650 1651 /* NAN_DATA interfaces must be closed before stopping NAN */ 1652 cfg80211_close_dependents(rdev, wdev); 1653 1654 guard(wiphy)(&rdev->wiphy); 1655 1656 cfg80211_leave_locked(rdev, wdev, link_id); 1657 } 1658 1659 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1660 int link_id, gfp_t gfp) 1661 { 1662 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1663 struct cfg80211_event *ev; 1664 unsigned long flags; 1665 1666 /* Only AP/GO interfaces may have a specific link_id */ 1667 if (WARN_ON_ONCE(link_id != -1 && 1668 wdev->iftype != NL80211_IFTYPE_AP && 1669 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1670 link_id = -1; 1671 1672 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1673 1674 if (wdev->iftype == NL80211_IFTYPE_NAN) 1675 return; 1676 1677 ev = kzalloc_obj(*ev, gfp); 1678 if (!ev) 1679 return; 1680 1681 ev->type = EVENT_STOPPED; 1682 ev->link_id = link_id; 1683 1684 spin_lock_irqsave(&wdev->event_lock, flags); 1685 list_add_tail(&ev->list, &wdev->event_list); 1686 spin_unlock_irqrestore(&wdev->event_lock, flags); 1687 queue_work(cfg80211_wq, &rdev->event_work); 1688 } 1689 EXPORT_SYMBOL(cfg80211_stop_link); 1690 1691 void cfg80211_init_wdev(struct wireless_dev *wdev) 1692 { 1693 INIT_LIST_HEAD(&wdev->event_list); 1694 spin_lock_init(&wdev->event_lock); 1695 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1696 INIT_LIST_HEAD(&wdev->pmsr_list); 1697 spin_lock_init(&wdev->pmsr_lock); 1698 wiphy_work_init(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1699 1700 #ifdef CONFIG_CFG80211_WEXT 1701 wdev->wext.default_key = -1; 1702 wdev->wext.default_mgmt_key = -1; 1703 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1704 #endif 1705 1706 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1707 1708 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1709 wdev->ps = true; 1710 else 1711 wdev->ps = false; 1712 /* allow mac80211 to determine the timeout */ 1713 wdev->ps_timeout = -1; 1714 1715 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1716 1717 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1718 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1719 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1720 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1721 1722 wiphy_work_init(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1723 } 1724 1725 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1726 struct wireless_dev *wdev) 1727 { 1728 ASSERT_RTNL(); 1729 lockdep_assert_held(&rdev->wiphy.mtx); 1730 1731 /* 1732 * We get here also when the interface changes network namespaces, 1733 * as it's registered into the new one, but we don't want it to 1734 * change ID in that case. Checking if the ID is already assigned 1735 * works, because 0 isn't considered a valid ID and the memory is 1736 * 0-initialized. 1737 */ 1738 if (!wdev->identifier) 1739 wdev->identifier = ++rdev->wdev_id; 1740 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1741 rdev->devlist_generation++; 1742 wdev->registered = true; 1743 1744 if (wdev->netdev && 1745 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1746 "phy80211")) 1747 pr_err("failed to add phy80211 symlink to netdev!\n"); 1748 1749 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1750 } 1751 1752 int cfg80211_register_netdevice(struct net_device *dev) 1753 { 1754 struct wireless_dev *wdev = dev->ieee80211_ptr; 1755 struct cfg80211_registered_device *rdev; 1756 int ret; 1757 1758 ASSERT_RTNL(); 1759 1760 if (WARN_ON(!wdev)) 1761 return -EINVAL; 1762 1763 rdev = wiphy_to_rdev(wdev->wiphy); 1764 1765 lockdep_assert_held(&rdev->wiphy.mtx); 1766 1767 /* we'll take care of this */ 1768 wdev->registered = true; 1769 wdev->registering = true; 1770 ret = register_netdevice(dev); 1771 if (ret) 1772 goto out; 1773 1774 cfg80211_register_wdev(rdev, wdev); 1775 ret = 0; 1776 out: 1777 wdev->registering = false; 1778 if (ret) 1779 wdev->registered = false; 1780 return ret; 1781 } 1782 EXPORT_SYMBOL(cfg80211_register_netdevice); 1783 1784 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1785 unsigned long state, void *ptr) 1786 { 1787 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1788 struct wireless_dev *wdev = dev->ieee80211_ptr; 1789 struct cfg80211_registered_device *rdev; 1790 struct cfg80211_sched_scan_request *pos, *tmp; 1791 1792 if (!wdev) 1793 return NOTIFY_DONE; 1794 1795 rdev = wiphy_to_rdev(wdev->wiphy); 1796 1797 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1798 1799 switch (state) { 1800 case NETDEV_POST_INIT: 1801 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1802 wdev->netdev = dev; 1803 /* can only change netns with wiphy */ 1804 dev->netns_immutable = true; 1805 1806 cfg80211_init_wdev(wdev); 1807 break; 1808 case NETDEV_REGISTER: 1809 if (!wdev->registered) { 1810 guard(wiphy)(&rdev->wiphy); 1811 1812 cfg80211_register_wdev(rdev, wdev); 1813 } 1814 break; 1815 case NETDEV_UNREGISTER: 1816 /* 1817 * It is possible to get NETDEV_UNREGISTER multiple times, 1818 * so check wdev->registered. 1819 */ 1820 if (wdev->registered && !wdev->registering) { 1821 guard(wiphy)(&rdev->wiphy); 1822 1823 _cfg80211_unregister_wdev(wdev, false); 1824 } 1825 break; 1826 case NETDEV_GOING_DOWN: 1827 cfg80211_leave(rdev, wdev, -1); 1828 scoped_guard(wiphy, &rdev->wiphy) { 1829 cfg80211_remove_links(wdev); 1830 /* since we just did cfg80211_leave() nothing to do there */ 1831 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1832 } 1833 break; 1834 case NETDEV_DOWN: 1835 wiphy_lock(&rdev->wiphy); 1836 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1837 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1838 if (!rdev->scan_req->notified && 1839 (!rdev->int_scan_req || 1840 !rdev->int_scan_req->notified)) 1841 rdev->scan_req->info.aborted = true; 1842 ___cfg80211_scan_done(rdev, false); 1843 } 1844 1845 list_for_each_entry_safe(pos, tmp, 1846 &rdev->sched_scan_req_list, list) { 1847 if (WARN_ON(pos->dev == wdev->netdev)) 1848 cfg80211_stop_sched_scan_req(rdev, pos, false); 1849 } 1850 1851 rdev->opencount--; 1852 wiphy_unlock(&rdev->wiphy); 1853 wake_up(&rdev->dev_wait); 1854 break; 1855 case NETDEV_UP: 1856 wiphy_lock(&rdev->wiphy); 1857 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1858 switch (wdev->iftype) { 1859 #ifdef CONFIG_CFG80211_WEXT 1860 case NL80211_IFTYPE_ADHOC: 1861 cfg80211_ibss_wext_join(rdev, wdev); 1862 break; 1863 case NL80211_IFTYPE_STATION: 1864 cfg80211_mgd_wext_connect(rdev, wdev); 1865 break; 1866 #endif 1867 #ifdef CONFIG_MAC80211_MESH 1868 case NL80211_IFTYPE_MESH_POINT: 1869 { 1870 /* backward compat code... */ 1871 struct mesh_setup setup; 1872 memcpy(&setup, &default_mesh_setup, 1873 sizeof(setup)); 1874 /* back compat only needed for mesh_id */ 1875 setup.mesh_id = wdev->u.mesh.id; 1876 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1877 if (wdev->u.mesh.id_up_len) 1878 __cfg80211_join_mesh(rdev, dev, 1879 &setup, 1880 &default_mesh_config); 1881 break; 1882 } 1883 #endif 1884 default: 1885 break; 1886 } 1887 rdev->opencount++; 1888 1889 /* 1890 * Configure power management to the driver here so that its 1891 * correctly set also after interface type changes etc. 1892 */ 1893 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1894 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1895 rdev->ops->set_power_mgmt && 1896 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1897 wdev->ps_timeout)) { 1898 /* assume this means it's off */ 1899 wdev->ps = false; 1900 } 1901 wiphy_unlock(&rdev->wiphy); 1902 break; 1903 case NETDEV_PRE_UP: 1904 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1905 wdev->use_4addr, 0)) 1906 return notifier_from_errno(-EOPNOTSUPP); 1907 1908 if (rfkill_blocked(rdev->wiphy.rfkill)) 1909 return notifier_from_errno(-ERFKILL); 1910 1911 /* NAN_DATA interfaces require a running NAN interface */ 1912 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { 1913 struct wireless_dev *iter; 1914 bool nan_started = false; 1915 1916 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { 1917 if (iter->iftype == NL80211_IFTYPE_NAN && 1918 wdev_running(iter)) { 1919 nan_started = true; 1920 break; 1921 } 1922 } 1923 1924 if (!nan_started) 1925 return notifier_from_errno(-ENOLINK); 1926 } 1927 break; 1928 default: 1929 return NOTIFY_DONE; 1930 } 1931 1932 wireless_nlevent_flush(); 1933 1934 return NOTIFY_OK; 1935 } 1936 1937 static struct notifier_block cfg80211_netdev_notifier = { 1938 .notifier_call = cfg80211_netdev_notifier_call, 1939 }; 1940 1941 static void __net_exit cfg80211_pernet_exit(struct net *net) 1942 { 1943 struct cfg80211_registered_device *rdev; 1944 1945 rtnl_lock(); 1946 for_each_rdev(rdev) { 1947 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1948 WARN_ON(__cfg80211_switch_netns(rdev, &init_net, true)); 1949 } 1950 rtnl_unlock(); 1951 } 1952 1953 static struct pernet_operations cfg80211_pernet_ops = { 1954 .exit = cfg80211_pernet_exit, 1955 }; 1956 1957 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1958 { 1959 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1960 unsigned long flags; 1961 1962 trace_wiphy_work_queue(wiphy, work); 1963 1964 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1965 if (list_empty(&work->entry)) 1966 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1967 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1968 1969 queue_work(system_dfl_wq, &rdev->wiphy_work); 1970 } 1971 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1972 1973 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1974 { 1975 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1976 unsigned long flags; 1977 1978 lockdep_assert_held(&wiphy->mtx); 1979 1980 trace_wiphy_work_cancel(wiphy, work); 1981 1982 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1983 if (!list_empty(&work->entry)) 1984 list_del_init(&work->entry); 1985 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1986 } 1987 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 1988 1989 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 1990 { 1991 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1992 unsigned long flags; 1993 bool run; 1994 1995 trace_wiphy_work_flush(wiphy, work); 1996 1997 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1998 run = !work || !list_empty(&work->entry); 1999 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 2000 2001 if (run) 2002 cfg80211_process_wiphy_works(rdev, work); 2003 } 2004 EXPORT_SYMBOL_GPL(wiphy_work_flush); 2005 2006 void wiphy_delayed_work_timer(struct timer_list *t) 2007 { 2008 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 2009 2010 wiphy_work_queue(dwork->wiphy, &dwork->work); 2011 } 2012 EXPORT_SYMBOL(wiphy_delayed_work_timer); 2013 2014 void wiphy_delayed_work_queue(struct wiphy *wiphy, 2015 struct wiphy_delayed_work *dwork, 2016 unsigned long delay) 2017 { 2018 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 2019 2020 if (!delay) { 2021 timer_delete(&dwork->timer); 2022 wiphy_work_queue(wiphy, &dwork->work); 2023 return; 2024 } 2025 2026 dwork->wiphy = wiphy; 2027 mod_timer(&dwork->timer, jiffies + delay); 2028 } 2029 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 2030 2031 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 2032 struct wiphy_delayed_work *dwork) 2033 { 2034 lockdep_assert_held(&wiphy->mtx); 2035 2036 timer_delete_sync(&dwork->timer); 2037 wiphy_work_cancel(wiphy, &dwork->work); 2038 } 2039 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 2040 2041 void wiphy_delayed_work_flush(struct wiphy *wiphy, 2042 struct wiphy_delayed_work *dwork) 2043 { 2044 lockdep_assert_held(&wiphy->mtx); 2045 2046 timer_delete_sync(&dwork->timer); 2047 wiphy_work_flush(wiphy, &dwork->work); 2048 } 2049 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 2050 2051 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 2052 struct wiphy_delayed_work *dwork) 2053 { 2054 return timer_pending(&dwork->timer); 2055 } 2056 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 2057 2058 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 2059 { 2060 struct wiphy_hrtimer_work *hrwork = 2061 container_of(t, struct wiphy_hrtimer_work, timer); 2062 2063 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 2064 2065 return HRTIMER_NORESTART; 2066 } 2067 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 2068 2069 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 2070 struct wiphy_hrtimer_work *hrwork, 2071 ktime_t delay) 2072 { 2073 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 2074 2075 if (!delay) { 2076 hrtimer_cancel(&hrwork->timer); 2077 wiphy_work_queue(wiphy, &hrwork->work); 2078 return; 2079 } 2080 2081 hrwork->wiphy = wiphy; 2082 hrtimer_start_range_ns(&hrwork->timer, delay, 2083 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 2084 } 2085 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 2086 2087 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 2088 struct wiphy_hrtimer_work *hrwork) 2089 { 2090 lockdep_assert_held(&wiphy->mtx); 2091 2092 hrtimer_cancel(&hrwork->timer); 2093 wiphy_work_cancel(wiphy, &hrwork->work); 2094 } 2095 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 2096 2097 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 2098 struct wiphy_hrtimer_work *hrwork) 2099 { 2100 lockdep_assert_held(&wiphy->mtx); 2101 2102 hrtimer_cancel(&hrwork->timer); 2103 wiphy_work_flush(wiphy, &hrwork->work); 2104 } 2105 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 2106 2107 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 2108 struct wiphy_hrtimer_work *hrwork) 2109 { 2110 return hrtimer_is_queued(&hrwork->timer); 2111 } 2112 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 2113 2114 static int __init cfg80211_init(void) 2115 { 2116 int err; 2117 2118 err = register_pernet_device(&cfg80211_pernet_ops); 2119 if (err) 2120 goto out_fail_pernet; 2121 2122 err = wiphy_sysfs_init(); 2123 if (err) 2124 goto out_fail_sysfs; 2125 2126 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 2127 if (err) 2128 goto out_fail_notifier; 2129 2130 err = nl80211_init(); 2131 if (err) 2132 goto out_fail_nl80211; 2133 2134 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 2135 2136 err = regulatory_init(); 2137 if (err) 2138 goto out_fail_reg; 2139 2140 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 2141 if (!cfg80211_wq) { 2142 err = -ENOMEM; 2143 goto out_fail_wq; 2144 } 2145 2146 return 0; 2147 2148 out_fail_wq: 2149 regulatory_exit(); 2150 out_fail_reg: 2151 debugfs_remove(ieee80211_debugfs_dir); 2152 nl80211_exit(); 2153 out_fail_nl80211: 2154 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2155 out_fail_notifier: 2156 wiphy_sysfs_exit(); 2157 out_fail_sysfs: 2158 unregister_pernet_device(&cfg80211_pernet_ops); 2159 out_fail_pernet: 2160 return err; 2161 } 2162 fs_initcall(cfg80211_init); 2163 2164 static void __exit cfg80211_exit(void) 2165 { 2166 debugfs_remove(ieee80211_debugfs_dir); 2167 nl80211_exit(); 2168 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2169 wiphy_sysfs_exit(); 2170 regulatory_exit(); 2171 unregister_pernet_device(&cfg80211_pernet_ops); 2172 destroy_workqueue(cfg80211_wq); 2173 } 2174 module_exit(cfg80211_exit); 2175