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 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 157 struct net *net) 158 { 159 struct wireless_dev *wdev; 160 int err = 0; 161 162 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 163 return -EOPNOTSUPP; 164 165 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 166 if (!wdev->netdev) 167 continue; 168 wdev->netdev->netns_immutable = false; 169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 170 if (err) 171 break; 172 wdev->netdev->netns_immutable = true; 173 } 174 175 if (err) { 176 /* failed -- clean up to old netns */ 177 net = wiphy_net(&rdev->wiphy); 178 179 list_for_each_entry_continue_reverse(wdev, 180 &rdev->wiphy.wdev_list, 181 list) { 182 if (!wdev->netdev) 183 continue; 184 wdev->netdev->netns_immutable = false; 185 err = dev_change_net_namespace(wdev->netdev, net, 186 "wlan%d"); 187 WARN_ON(err); 188 wdev->netdev->netns_immutable = true; 189 } 190 191 return err; 192 } 193 194 guard(wiphy)(&rdev->wiphy); 195 196 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 197 if (!wdev->netdev) 198 continue; 199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 200 } 201 202 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 203 204 wiphy_net_set(&rdev->wiphy, net); 205 206 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 207 WARN_ON(err); 208 209 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 210 211 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 212 if (!wdev->netdev) 213 continue; 214 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 215 } 216 217 return 0; 218 } 219 220 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 221 { 222 struct cfg80211_registered_device *rdev = data; 223 224 guard(wiphy)(&rdev->wiphy); 225 226 rdev_rfkill_poll(rdev); 227 } 228 229 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 230 struct wireless_dev *wdev) 231 { 232 lockdep_assert_held(&rdev->wiphy.mtx); 233 234 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 235 return; 236 237 if (!wdev_running(wdev)) 238 return; 239 240 rdev_stop_p2p_device(rdev, wdev); 241 wdev->is_running = false; 242 243 rdev->opencount--; 244 245 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 246 if (WARN_ON(!rdev->scan_req->notified && 247 (!rdev->int_scan_req || 248 !rdev->int_scan_req->notified))) 249 rdev->scan_req->info.aborted = true; 250 ___cfg80211_scan_done(rdev, false); 251 } 252 } 253 254 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 255 struct wireless_dev *wdev) 256 { 257 struct cfg80211_nan_local_sched empty_sched = {}; 258 259 lockdep_assert_held(&rdev->wiphy.mtx); 260 261 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 262 return; 263 264 if (!wdev_running(wdev)) 265 return; 266 267 /* 268 * If there is a scheduled update pending, mark it as canceled, so the 269 * empty schedule will be accepted 270 */ 271 wdev->u.nan.sched_update_pending = false; 272 273 /* Unschedule all */ 274 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched); 275 276 rdev_stop_nan(rdev, wdev); 277 wdev->is_running = false; 278 279 eth_zero_addr(wdev->u.nan.cluster_id); 280 281 rdev->opencount--; 282 } 283 284 int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev, 285 struct wireless_dev *wdev, 286 struct cfg80211_nan_local_sched *sched) 287 { 288 int ret; 289 290 lockdep_assert_held(&rdev->wiphy.mtx); 291 292 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) 293 return -EINVAL; 294 295 if (wdev->u.nan.sched_update_pending) 296 return -EBUSY; 297 298 ret = rdev_nan_set_local_sched(rdev, wdev, sched); 299 if (ret) 300 return ret; 301 302 wdev->u.nan.sched_update_pending = sched->deferred; 303 304 kfree(wdev->u.nan.chandefs); 305 wdev->u.nan.chandefs = NULL; 306 wdev->u.nan.n_channels = 0; 307 308 if (!sched->n_channels) 309 return 0; 310 311 wdev->u.nan.chandefs = kcalloc(sched->n_channels, 312 sizeof(*wdev->u.nan.chandefs), 313 GFP_KERNEL); 314 if (!wdev->u.nan.chandefs) 315 return -ENOMEM; 316 317 for (int i = 0; i < sched->n_channels; i++) 318 wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef; 319 320 wdev->u.nan.n_channels = sched->n_channels; 321 322 return 0; 323 } 324 325 void cfg80211_stop_pd(struct cfg80211_registered_device *rdev, 326 struct wireless_dev *wdev) 327 { 328 lockdep_assert_held(&rdev->wiphy.mtx); 329 330 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD)) 331 return; 332 333 if (!rdev->ops->stop_pd) 334 return; 335 336 if (!wdev_running(wdev)) 337 return; 338 339 cfg80211_pmsr_wdev_down(wdev); 340 341 rdev_stop_pd(rdev, wdev); 342 wdev->is_running = false; 343 344 rdev->opencount--; 345 } 346 347 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 348 { 349 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 350 struct wireless_dev *wdev; 351 352 ASSERT_RTNL(); 353 354 /* 355 * Some netdev interfaces need to be closed before some non-netdev 356 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN 357 * interface 358 */ 359 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 360 if (wdev->netdev) { 361 dev_close(wdev->netdev); 362 continue; 363 } 364 } 365 366 guard(wiphy)(wiphy); 367 368 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 369 switch (wdev->iftype) { 370 case NL80211_IFTYPE_P2P_DEVICE: 371 cfg80211_stop_p2p_device(rdev, wdev); 372 break; 373 case NL80211_IFTYPE_NAN: 374 cfg80211_stop_nan(rdev, wdev); 375 break; 376 case NL80211_IFTYPE_PD: 377 cfg80211_stop_pd(rdev, wdev); 378 break; 379 default: 380 break; 381 } 382 } 383 } 384 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 385 386 static int cfg80211_rfkill_set_block(void *data, bool blocked) 387 { 388 struct cfg80211_registered_device *rdev = data; 389 390 if (!blocked) 391 return 0; 392 393 rtnl_lock(); 394 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 395 rtnl_unlock(); 396 397 return 0; 398 } 399 400 static void cfg80211_rfkill_block_work(struct work_struct *work) 401 { 402 struct cfg80211_registered_device *rdev; 403 404 rdev = container_of(work, struct cfg80211_registered_device, 405 rfkill_block); 406 cfg80211_rfkill_set_block(rdev, true); 407 } 408 409 static void cfg80211_event_work(struct work_struct *work) 410 { 411 struct cfg80211_registered_device *rdev; 412 413 rdev = container_of(work, struct cfg80211_registered_device, 414 event_work); 415 416 guard(wiphy)(&rdev->wiphy); 417 418 cfg80211_process_rdev_events(rdev); 419 } 420 421 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 422 { 423 struct wireless_dev *wdev, *tmp; 424 425 ASSERT_RTNL(); 426 427 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 428 if (wdev->nl_owner_dead) { 429 cfg80211_close_dependents(rdev, wdev); 430 431 if (wdev->netdev) 432 dev_close(wdev->netdev); 433 434 guard(wiphy)(&rdev->wiphy); 435 436 cfg80211_remove_virtual_intf(rdev, wdev); 437 } 438 } 439 } 440 441 void cfg80211_close_dependents(struct cfg80211_registered_device *rdev, 442 struct wireless_dev *wdev) 443 { 444 ASSERT_RTNL(); 445 446 if (wdev->iftype != NL80211_IFTYPE_NAN) 447 return; 448 449 /* Close all NAN DATA interfaces */ 450 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 451 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) 452 dev_close(wdev->netdev); 453 } 454 } 455 456 static void cfg80211_destroy_iface_wk(struct work_struct *work) 457 { 458 struct cfg80211_registered_device *rdev; 459 460 rdev = container_of(work, struct cfg80211_registered_device, 461 destroy_work); 462 463 rtnl_lock(); 464 cfg80211_destroy_ifaces(rdev); 465 rtnl_unlock(); 466 } 467 468 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, 469 struct wiphy_work *work) 470 { 471 struct cfg80211_registered_device *rdev; 472 struct cfg80211_sched_scan_request *req, *tmp; 473 474 rdev = container_of(work, struct cfg80211_registered_device, 475 sched_scan_stop_wk); 476 477 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 478 if (req->nl_owner_dead) 479 cfg80211_stop_sched_scan_req(rdev, req, false); 480 } 481 } 482 483 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 484 { 485 struct cfg80211_registered_device *rdev; 486 487 rdev = container_of(work, struct cfg80211_registered_device, 488 propagate_radar_detect_wk); 489 490 rtnl_lock(); 491 492 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 493 NL80211_DFS_UNAVAILABLE, 494 NL80211_RADAR_DETECTED); 495 496 rtnl_unlock(); 497 } 498 499 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 500 { 501 struct cfg80211_registered_device *rdev; 502 503 rdev = container_of(work, struct cfg80211_registered_device, 504 propagate_cac_done_wk); 505 506 rtnl_lock(); 507 508 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 509 NL80211_DFS_AVAILABLE, 510 NL80211_RADAR_CAC_FINISHED); 511 512 rtnl_unlock(); 513 } 514 515 static void cfg80211_wiphy_work(struct work_struct *work) 516 { 517 struct cfg80211_registered_device *rdev; 518 struct wiphy_work *wk; 519 520 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); 521 522 trace_wiphy_work_worker_start(&rdev->wiphy); 523 524 guard(wiphy)(&rdev->wiphy); 525 if (rdev->suspended) 526 return; 527 528 spin_lock_irq(&rdev->wiphy_work_lock); 529 wk = list_first_entry_or_null(&rdev->wiphy_work_list, 530 struct wiphy_work, entry); 531 if (wk) { 532 list_del_init(&wk->entry); 533 if (!list_empty(&rdev->wiphy_work_list)) 534 queue_work(system_dfl_wq, work); 535 spin_unlock_irq(&rdev->wiphy_work_lock); 536 537 trace_wiphy_work_run(&rdev->wiphy, wk); 538 wk->func(&rdev->wiphy, wk); 539 } else { 540 spin_unlock_irq(&rdev->wiphy_work_lock); 541 } 542 } 543 544 /* exported functions */ 545 546 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 547 const char *requested_name) 548 { 549 static atomic_t wiphy_counter = ATOMIC_INIT(0); 550 551 struct cfg80211_registered_device *rdev; 552 int alloc_size; 553 554 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 555 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 556 WARN_ON(ops->connect && !ops->disconnect); 557 WARN_ON(ops->join_ibss && !ops->leave_ibss); 558 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 559 WARN_ON(ops->add_station && !ops->del_station); 560 WARN_ON(ops->add_mpath && !ops->del_mpath); 561 WARN_ON(ops->join_mesh && !ops->leave_mesh); 562 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 563 WARN_ON(ops->start_ap && !ops->stop_ap); 564 WARN_ON(ops->join_ocb && !ops->leave_ocb); 565 WARN_ON(ops->suspend && !ops->resume); 566 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 567 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 568 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 569 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 570 571 alloc_size = sizeof(*rdev) + sizeof_priv; 572 573 rdev = kzalloc(alloc_size, GFP_KERNEL); 574 if (!rdev) 575 return NULL; 576 577 rdev->ops = ops; 578 579 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 580 581 if (unlikely(rdev->wiphy_idx < 0)) { 582 /* ugh, wrapped! */ 583 atomic_dec(&wiphy_counter); 584 kfree(rdev); 585 return NULL; 586 } 587 588 /* atomic_inc_return makes it start at 1, make it start at 0 */ 589 rdev->wiphy_idx--; 590 591 /* give it a proper name */ 592 if (requested_name && requested_name[0]) { 593 int rv; 594 595 rtnl_lock(); 596 rv = cfg80211_dev_check_name(rdev, requested_name); 597 598 if (rv < 0) { 599 rtnl_unlock(); 600 goto use_default_name; 601 } 602 603 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 604 rtnl_unlock(); 605 if (rv) 606 goto use_default_name; 607 } else { 608 int rv; 609 610 use_default_name: 611 /* NOTE: This is *probably* safe w/out holding rtnl because of 612 * the restrictions on phy names. Probably this call could 613 * fail if some other part of the kernel (re)named a device 614 * phyX. But, might should add some locking and check return 615 * value, and use a different name if this one exists? 616 */ 617 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 618 if (rv < 0) { 619 kfree(rdev); 620 return NULL; 621 } 622 } 623 624 mutex_init(&rdev->wiphy.mtx); 625 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 626 INIT_LIST_HEAD(&rdev->beacon_registrations); 627 spin_lock_init(&rdev->beacon_registrations_lock); 628 spin_lock_init(&rdev->bss_lock); 629 INIT_LIST_HEAD(&rdev->bss_list); 630 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 631 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); 632 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 633 cfg80211_dfs_channels_update_work); 634 #ifdef CONFIG_CFG80211_WEXT 635 rdev->wiphy.wext = &cfg80211_wext_handler; 636 #endif 637 638 device_initialize(&rdev->wiphy.dev); 639 rdev->wiphy.dev.class = &ieee80211_class; 640 rdev->wiphy.dev.platform_data = rdev; 641 device_enable_async_suspend(&rdev->wiphy.dev); 642 643 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 644 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 645 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 646 INIT_WORK(&rdev->propagate_radar_detect_wk, 647 cfg80211_propagate_radar_detect_wk); 648 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 649 INIT_WORK(&rdev->mgmt_registrations_update_wk, 650 cfg80211_mgmt_registrations_update_wk); 651 spin_lock_init(&rdev->mgmt_registrations_lock); 652 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); 653 INIT_LIST_HEAD(&rdev->wiphy_work_list); 654 spin_lock_init(&rdev->wiphy_work_lock); 655 656 #ifdef CONFIG_CFG80211_DEFAULT_PS 657 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 658 #endif 659 660 wiphy_net_set(&rdev->wiphy, &init_net); 661 662 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 663 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 664 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 665 &rdev->rfkill_ops, rdev); 666 667 if (!rdev->wiphy.rfkill) { 668 wiphy_free(&rdev->wiphy); 669 return NULL; 670 } 671 672 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 673 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 674 INIT_WORK(&rdev->event_work, cfg80211_event_work); 675 INIT_WORK(&rdev->background_cac_abort_wk, 676 cfg80211_background_cac_abort_wk); 677 INIT_DELAYED_WORK(&rdev->background_cac_done_wk, 678 cfg80211_background_cac_done_wk); 679 680 init_waitqueue_head(&rdev->dev_wait); 681 682 /* 683 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 684 * Fragmentation and RTS threshold are disabled by default with the 685 * special -1 value. 686 */ 687 rdev->wiphy.retry_short = 7; 688 rdev->wiphy.retry_long = 4; 689 rdev->wiphy.frag_threshold = (u32) -1; 690 rdev->wiphy.rts_threshold = (u32) -1; 691 rdev->wiphy.coverage_class = 0; 692 693 rdev->wiphy.max_num_csa_counters = 1; 694 695 rdev->wiphy.max_sched_scan_plans = 1; 696 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 697 698 return &rdev->wiphy; 699 } 700 EXPORT_SYMBOL(wiphy_new_nm); 701 702 static 703 int wiphy_verify_iface_combinations(struct wiphy *wiphy, 704 const struct ieee80211_iface_combination *iface_comb, 705 int n_iface_comb, 706 bool combined_radio) 707 { 708 const struct ieee80211_iface_combination *c; 709 int i, j; 710 711 for (i = 0; i < n_iface_comb; i++) { 712 u32 cnt = 0; 713 u16 all_iftypes = 0; 714 715 c = &iface_comb[i]; 716 717 /* 718 * Combinations with just one interface aren't real, 719 * however we make an exception for DFS. 720 */ 721 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 722 return -EINVAL; 723 724 /* Need at least one channel */ 725 if (WARN_ON(!c->num_different_channels)) 726 return -EINVAL; 727 728 /* DFS only works on one channel. Avoid this check 729 * for multi-radio global combination, since it hold 730 * the capabilities of all radio combinations. 731 */ 732 if (!combined_radio && 733 WARN_ON(c->radar_detect_widths && 734 c->num_different_channels > 1)) 735 return -EINVAL; 736 737 if (WARN_ON(!c->n_limits)) 738 return -EINVAL; 739 740 for (j = 0; j < c->n_limits; j++) { 741 u16 types = c->limits[j].types; 742 743 /* interface types shouldn't overlap */ 744 if (WARN_ON(types & all_iftypes)) 745 return -EINVAL; 746 all_iftypes |= types; 747 748 if (WARN_ON(!c->limits[j].max)) 749 return -EINVAL; 750 751 /* Shouldn't list software iftypes in combinations! */ 752 if (WARN_ON(wiphy->software_iftypes & types)) 753 return -EINVAL; 754 755 /* Only a single P2P_DEVICE can be allowed, avoid this 756 * check for multi-radio global combination, since it 757 * hold the capabilities of all radio combinations. 758 */ 759 if (!combined_radio && 760 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 761 c->limits[j].max > 1)) 762 return -EINVAL; 763 764 /* Only a single NAN can be allowed */ 765 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 766 c->limits[j].max > 1)) 767 return -EINVAL; 768 769 /* 770 * This isn't well-defined right now. If you have an 771 * IBSS interface, then its beacon interval may change 772 * by joining other networks, and nothing prevents it 773 * from doing that. 774 * So technically we probably shouldn't even allow AP 775 * and IBSS in the same interface, but it seems that 776 * some drivers support that, possibly only with fixed 777 * beacon intervals for IBSS. 778 */ 779 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 780 c->beacon_int_min_gcd)) { 781 return -EINVAL; 782 } 783 784 cnt += c->limits[j].max; 785 /* 786 * Don't advertise an unsupported type 787 * in a combination. 788 */ 789 if (WARN_ON((wiphy->interface_modes & types) != types)) 790 return -EINVAL; 791 } 792 793 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 794 return -EINVAL; 795 796 /* You can't even choose that many! */ 797 if (WARN_ON(cnt < c->max_interfaces)) 798 return -EINVAL; 799 } 800 801 return 0; 802 } 803 804 static int wiphy_verify_combinations(struct wiphy *wiphy) 805 { 806 int i, ret; 807 bool combined_radio = false; 808 809 if (wiphy->n_radio) { 810 for (i = 0; i < wiphy->n_radio; i++) { 811 const struct wiphy_radio *radio = &wiphy->radio[i]; 812 813 ret = wiphy_verify_iface_combinations(wiphy, 814 radio->iface_combinations, 815 radio->n_iface_combinations, 816 false); 817 if (ret) 818 return ret; 819 } 820 821 combined_radio = true; 822 } 823 824 ret = wiphy_verify_iface_combinations(wiphy, 825 wiphy->iface_combinations, 826 wiphy->n_iface_combinations, 827 combined_radio); 828 829 return ret; 830 } 831 832 static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy) 833 { 834 int i, j; 835 836 if (wiphy->n_cipher_suites && !wiphy->cipher_suites) 837 return false; 838 839 for (i = 0; i < wiphy->n_cipher_suites; i++) { 840 for (j = 0; j < i; j++) { 841 if (wiphy->cipher_suites[i] == 842 wiphy->cipher_suites[j]) 843 return false; 844 } 845 } 846 847 return true; 848 } 849 850 int wiphy_register(struct wiphy *wiphy) 851 { 852 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 853 int res; 854 enum nl80211_band band; 855 struct ieee80211_supported_band *sband; 856 bool have_band = false; 857 int i; 858 u16 ifmodes = wiphy->interface_modes; 859 860 #ifdef CONFIG_PM 861 if (WARN_ON(wiphy->wowlan && 862 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 863 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 864 return -EINVAL; 865 if (WARN_ON(wiphy->wowlan && 866 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 867 !wiphy->wowlan->tcp)) 868 return -EINVAL; 869 #endif 870 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 871 (!rdev->ops->tdls_channel_switch || 872 !rdev->ops->tdls_cancel_channel_switch))) 873 return -EINVAL; 874 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) && 875 (!rdev->ops->start_pd || !rdev->ops->stop_pd))) 876 return -EINVAL; 877 878 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 879 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 880 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 881 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 882 return -EINVAL; 883 884 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) && 885 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1))) 886 return -EINVAL; 887 888 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 889 return -EINVAL; 890 891 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 892 return -EINVAL; 893 894 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 895 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 896 !wiphy->pmsr_capa->ftm.non_asap)) 897 return -EINVAL; 898 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 899 !wiphy->pmsr_capa->ftm.bandwidths)) 900 return -EINVAL; 901 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 902 ~(BIT(NL80211_PREAMBLE_LEGACY) | 903 BIT(NL80211_PREAMBLE_HT) | 904 BIT(NL80211_PREAMBLE_VHT) | 905 BIT(NL80211_PREAMBLE_HE) | 906 BIT(NL80211_PREAMBLE_DMG)))) 907 return -EINVAL; 908 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 909 wiphy->pmsr_capa->ftm.non_trigger_based) && 910 !(wiphy->pmsr_capa->ftm.preambles & 911 BIT(NL80211_PREAMBLE_HE)))) 912 return -EINVAL; 913 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 914 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 915 BIT(NL80211_CHAN_WIDTH_20) | 916 BIT(NL80211_CHAN_WIDTH_40) | 917 BIT(NL80211_CHAN_WIDTH_80) | 918 BIT(NL80211_CHAN_WIDTH_80P80) | 919 BIT(NL80211_CHAN_WIDTH_160) | 920 BIT(NL80211_CHAN_WIDTH_320)))) 921 return -EINVAL; 922 } 923 924 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 925 (wiphy->regulatory_flags & 926 (REGULATORY_CUSTOM_REG | 927 REGULATORY_STRICT_REG | 928 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 929 REGULATORY_COUNTRY_IE_IGNORE)))) 930 return -EINVAL; 931 932 if (WARN_ON(wiphy->coalesce && 933 (!wiphy->coalesce->n_rules || 934 !wiphy->coalesce->n_patterns) && 935 (!wiphy->coalesce->pattern_min_len || 936 wiphy->coalesce->pattern_min_len > 937 wiphy->coalesce->pattern_max_len))) 938 return -EINVAL; 939 940 if (WARN_ON(wiphy->ap_sme_capa && 941 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 942 return -EINVAL; 943 944 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 945 return -EINVAL; 946 947 if (WARN_ON(wiphy->addresses && 948 !is_zero_ether_addr(wiphy->perm_addr) && 949 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 950 ETH_ALEN))) 951 return -EINVAL; 952 953 if (WARN_ON(wiphy->max_acl_mac_addrs && 954 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 955 !rdev->ops->set_mac_acl))) 956 return -EINVAL; 957 958 /* assure only valid behaviours are flagged by driver 959 * hence subtract 2 as bit 0 is invalid. 960 */ 961 if (WARN_ON(wiphy->bss_select_support && 962 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 963 return -EINVAL; 964 965 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 966 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 967 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 968 return -EINVAL; 969 970 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 971 rdev->ops->update_connect_params)) 972 return -EINVAL; 973 974 if (wiphy->addresses) 975 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 976 977 /* sanity check ifmodes */ 978 WARN_ON(!ifmodes); 979 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 980 if (WARN_ON(ifmodes != wiphy->interface_modes)) 981 wiphy->interface_modes = ifmodes; 982 983 res = wiphy_verify_combinations(wiphy); 984 if (res) 985 return res; 986 987 if (!wiphy_cipher_suites_valid(wiphy)) 988 return -EINVAL; 989 990 /* sanity check supported bands/channels */ 991 for (band = 0; band < NUM_NL80211_BANDS; band++) { 992 const struct ieee80211_sband_iftype_data *iftd; 993 u16 types = 0; 994 bool have_he = false; 995 996 sband = wiphy->bands[band]; 997 if (!sband) 998 continue; 999 1000 sband->band = band; 1001 if (WARN_ON(!sband->n_channels)) 1002 return -EINVAL; 1003 /* 1004 * on 60GHz or sub-1Ghz band, there are no legacy rates, so 1005 * n_bitrates is 0 1006 */ 1007 if (WARN_ON((band != NL80211_BAND_60GHZ && 1008 band != NL80211_BAND_S1GHZ) && 1009 !sband->n_bitrates)) 1010 return -EINVAL; 1011 1012 if (WARN_ON(band == NL80211_BAND_6GHZ && 1013 (sband->ht_cap.ht_supported || 1014 sband->vht_cap.vht_supported))) 1015 return -EINVAL; 1016 1017 /* 1018 * Since cfg80211_disable_40mhz_24ghz is global, we can 1019 * modify the sband's ht data even if the driver uses a 1020 * global structure for that. 1021 */ 1022 if (cfg80211_disable_40mhz_24ghz && 1023 band == NL80211_BAND_2GHZ && 1024 sband->ht_cap.ht_supported) { 1025 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1026 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 1027 } 1028 1029 /* 1030 * Since we use a u32 for rate bitmaps in 1031 * ieee80211_get_response_rate, we cannot 1032 * have more than 32 legacy rates. 1033 */ 1034 if (WARN_ON(sband->n_bitrates > 32)) 1035 return -EINVAL; 1036 1037 for (i = 0; i < sband->n_channels; i++) { 1038 sband->channels[i].orig_flags = 1039 sband->channels[i].flags; 1040 sband->channels[i].orig_mag = INT_MAX; 1041 sband->channels[i].orig_mpwr = 1042 sband->channels[i].max_power; 1043 sband->channels[i].band = band; 1044 1045 if (WARN_ON(sband->channels[i].freq_offset >= 1000)) 1046 return -EINVAL; 1047 } 1048 1049 for_each_sband_iftype_data(sband, i, iftd) { 1050 bool has_ap, has_non_ap; 1051 u32 ap_bits = BIT(NL80211_IFTYPE_AP) | 1052 BIT(NL80211_IFTYPE_P2P_GO); 1053 1054 if (WARN_ON(!iftd->types_mask)) 1055 return -EINVAL; 1056 if (WARN_ON(types & iftd->types_mask)) 1057 return -EINVAL; 1058 1059 /* at least one piece of information must be present */ 1060 if (WARN_ON(!iftd->he_cap.has_he)) 1061 return -EINVAL; 1062 1063 types |= iftd->types_mask; 1064 1065 if (i == 0) 1066 have_he = iftd->he_cap.has_he; 1067 else 1068 have_he = have_he && 1069 iftd->he_cap.has_he; 1070 1071 has_ap = iftd->types_mask & ap_bits; 1072 has_non_ap = iftd->types_mask & ~ap_bits; 1073 1074 /* 1075 * For EHT 20 MHz STA, the capabilities format differs 1076 * but to simplify, don't check 20 MHz but rather check 1077 * only if AP and non-AP were mentioned at the same time, 1078 * reject if so. 1079 */ 1080 if (WARN_ON(iftd->eht_cap.has_eht && 1081 has_ap && has_non_ap)) 1082 return -EINVAL; 1083 } 1084 1085 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) 1086 return -EINVAL; 1087 1088 have_band = true; 1089 } 1090 1091 if (!have_band) { 1092 WARN_ON(1); 1093 return -EINVAL; 1094 } 1095 1096 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 1097 /* 1098 * Validate we have a policy (can be explicitly set to 1099 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 1100 * we have at least one of doit/dumpit. 1101 */ 1102 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 1103 return -EINVAL; 1104 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 1105 !rdev->wiphy.vendor_commands[i].dumpit)) 1106 return -EINVAL; 1107 } 1108 1109 #ifdef CONFIG_PM 1110 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 1111 (!rdev->wiphy.wowlan->pattern_min_len || 1112 rdev->wiphy.wowlan->pattern_min_len > 1113 rdev->wiphy.wowlan->pattern_max_len))) 1114 return -EINVAL; 1115 #endif 1116 1117 if (!wiphy->max_num_akm_suites) 1118 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; 1119 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || 1120 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) 1121 return -EINVAL; 1122 1123 /* Allocate radio configuration space for multi-radio wiphy */ 1124 if (wiphy->n_radio > 0) { 1125 int idx; 1126 1127 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg, 1128 wiphy->n_radio); 1129 if (!wiphy->radio_cfg) 1130 return -ENOMEM; 1131 /* 1132 * Initialize wiphy radio parameters to IEEE 802.11 1133 * MIB default values. RTS threshold is disabled by 1134 * default with the special -1 value. 1135 */ 1136 for (idx = 0; idx < wiphy->n_radio; idx++) 1137 wiphy->radio_cfg[idx].rts_threshold = (u32)-1; 1138 } 1139 1140 /* check and set up bitrates */ 1141 ieee80211_set_bitrate_flags(wiphy); 1142 1143 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 1144 1145 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) 1146 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; 1147 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) 1148 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; 1149 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) 1150 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; 1151 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) 1152 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS; 1153 1154 rtnl_lock(); 1155 wiphy_lock(&rdev->wiphy); 1156 res = device_add(&rdev->wiphy.dev); 1157 if (res) { 1158 wiphy_unlock(&rdev->wiphy); 1159 rtnl_unlock(); 1160 return res; 1161 } 1162 1163 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 1164 cfg80211_rdev_list_generation++; 1165 1166 /* add to debugfs */ 1167 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 1168 ieee80211_debugfs_dir); 1169 if (wiphy->n_radio > 0) { 1170 int idx; 1171 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN]; 1172 1173 for (idx = 0; idx < wiphy->n_radio; idx++) { 1174 scnprintf(radio_name, sizeof(radio_name), "radio%d", 1175 idx); 1176 wiphy->radio_cfg[idx].radio_debugfsdir = 1177 debugfs_create_dir(radio_name, 1178 rdev->wiphy.debugfsdir); 1179 } 1180 } 1181 1182 cfg80211_debugfs_rdev_add(rdev); 1183 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 1184 wiphy_unlock(&rdev->wiphy); 1185 1186 /* set up regulatory info */ 1187 wiphy_regulatory_register(wiphy); 1188 1189 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1190 struct regulatory_request request = { 1191 .wiphy_idx = get_wiphy_idx(wiphy), 1192 .initiator = NL80211_REGDOM_SET_BY_DRIVER, 1193 .alpha2[0] = '9', 1194 .alpha2[1] = '9', 1195 }; 1196 1197 nl80211_send_reg_change_event(&request); 1198 } 1199 1200 /* Check that nobody globally advertises any capabilities they do not 1201 * advertise on all possible interface types. 1202 */ 1203 if (wiphy->extended_capabilities_len && 1204 wiphy->num_iftype_ext_capab && 1205 wiphy->iftype_ext_capab) { 1206 u8 supported_on_all, j; 1207 const struct wiphy_iftype_ext_capab *capab; 1208 1209 capab = wiphy->iftype_ext_capab; 1210 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 1211 if (capab[0].extended_capabilities_len > j) 1212 supported_on_all = 1213 capab[0].extended_capabilities[j]; 1214 else 1215 supported_on_all = 0x00; 1216 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 1217 if (j >= capab[i].extended_capabilities_len) { 1218 supported_on_all = 0x00; 1219 break; 1220 } 1221 supported_on_all &= 1222 capab[i].extended_capabilities[j]; 1223 } 1224 if (WARN_ON(wiphy->extended_capabilities[j] & 1225 ~supported_on_all)) 1226 break; 1227 } 1228 } 1229 1230 rdev->wiphy.registered = true; 1231 rtnl_unlock(); 1232 1233 res = rfkill_register(rdev->wiphy.rfkill); 1234 if (res) { 1235 rfkill_destroy(rdev->wiphy.rfkill); 1236 rdev->wiphy.rfkill = NULL; 1237 wiphy_unregister(&rdev->wiphy); 1238 return res; 1239 } 1240 1241 return 0; 1242 } 1243 EXPORT_SYMBOL(wiphy_register); 1244 1245 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 1246 { 1247 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1248 1249 if (!rdev->ops->rfkill_poll) 1250 return; 1251 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 1252 rfkill_resume_polling(wiphy->rfkill); 1253 } 1254 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 1255 1256 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 1257 struct wiphy_work *end) 1258 { 1259 unsigned int runaway_limit = 100; 1260 unsigned long flags; 1261 1262 lockdep_assert_held(&rdev->wiphy.mtx); 1263 1264 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1265 while (!list_empty(&rdev->wiphy_work_list)) { 1266 struct wiphy_work *wk; 1267 1268 wk = list_first_entry(&rdev->wiphy_work_list, 1269 struct wiphy_work, entry); 1270 list_del_init(&wk->entry); 1271 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1272 1273 trace_wiphy_work_run(&rdev->wiphy, wk); 1274 wk->func(&rdev->wiphy, wk); 1275 1276 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1277 1278 if (wk == end) 1279 break; 1280 1281 if (WARN_ON(--runaway_limit == 0)) 1282 INIT_LIST_HEAD(&rdev->wiphy_work_list); 1283 } 1284 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1285 } 1286 1287 void wiphy_unregister(struct wiphy *wiphy) 1288 { 1289 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1290 1291 wait_event(rdev->dev_wait, ({ 1292 int __count; 1293 wiphy_lock(&rdev->wiphy); 1294 __count = rdev->opencount; 1295 wiphy_unlock(&rdev->wiphy); 1296 __count == 0; })); 1297 1298 if (rdev->wiphy.rfkill) 1299 rfkill_unregister(rdev->wiphy.rfkill); 1300 1301 rtnl_lock(); 1302 wiphy_lock(&rdev->wiphy); 1303 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1304 rdev->wiphy.registered = false; 1305 1306 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1307 1308 /* 1309 * First remove the hardware from everywhere, this makes 1310 * it impossible to find from userspace. 1311 */ 1312 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1313 list_del_rcu(&rdev->list); 1314 synchronize_rcu(); 1315 1316 /* 1317 * If this device got a regulatory hint tell core its 1318 * free to listen now to a new shiny device regulatory hint 1319 */ 1320 wiphy_regulatory_deregister(wiphy); 1321 1322 cfg80211_rdev_list_generation++; 1323 device_del(&rdev->wiphy.dev); 1324 1325 #ifdef CONFIG_PM 1326 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1327 rdev_set_wakeup(rdev, false); 1328 #endif 1329 1330 /* surely nothing is reachable now, clean up work */ 1331 cfg80211_process_wiphy_works(rdev, NULL); 1332 wiphy_unlock(&rdev->wiphy); 1333 rtnl_unlock(); 1334 1335 /* this has nothing to do now but make sure it's gone */ 1336 cancel_work_sync(&rdev->wiphy_work); 1337 1338 cancel_work_sync(&rdev->rfkill_block); 1339 cancel_work_sync(&rdev->conn_work); 1340 flush_work(&rdev->event_work); 1341 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1342 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1343 flush_work(&rdev->destroy_work); 1344 flush_work(&rdev->propagate_radar_detect_wk); 1345 flush_work(&rdev->propagate_cac_done_wk); 1346 flush_work(&rdev->mgmt_registrations_update_wk); 1347 flush_work(&rdev->background_cac_abort_wk); 1348 1349 cfg80211_rdev_free_wowlan(rdev); 1350 cfg80211_free_coalesce(rdev->coalesce); 1351 rdev->coalesce = NULL; 1352 } 1353 EXPORT_SYMBOL(wiphy_unregister); 1354 1355 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1356 { 1357 struct cfg80211_internal_bss *scan, *tmp; 1358 struct cfg80211_beacon_registration *reg, *treg; 1359 unsigned long flags; 1360 1361 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1362 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1363 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1364 cancel_work_sync(&rdev->wiphy_work); 1365 1366 rfkill_destroy(rdev->wiphy.rfkill); 1367 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1368 list_del(®->list); 1369 kfree(reg); 1370 } 1371 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1372 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1373 mutex_destroy(&rdev->wiphy.mtx); 1374 1375 /* 1376 * The 'regd' can only be non-NULL if we never finished 1377 * initializing the wiphy and thus never went through the 1378 * unregister path - e.g. in failure scenarios. Thus, it 1379 * cannot have been visible to anyone if non-NULL, so we 1380 * can just free it here. 1381 */ 1382 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1383 1384 kfree(rdev); 1385 } 1386 1387 void wiphy_free(struct wiphy *wiphy) 1388 { 1389 kfree(wiphy->radio_cfg); 1390 put_device(&wiphy->dev); 1391 } 1392 EXPORT_SYMBOL(wiphy_free); 1393 1394 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1395 enum rfkill_hard_block_reasons reason) 1396 { 1397 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1398 1399 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1400 schedule_work(&rdev->rfkill_block); 1401 } 1402 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1403 1404 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1405 bool unregister_netdev) 1406 { 1407 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1408 struct cfg80211_cqm_config *cqm_config; 1409 unsigned int link_id; 1410 1411 ASSERT_RTNL(); 1412 lockdep_assert_held(&rdev->wiphy.mtx); 1413 1414 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1415 1416 wdev->registered = false; 1417 1418 if (wdev->netdev) { 1419 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1420 if (unregister_netdev) 1421 unregister_netdevice(wdev->netdev); 1422 } 1423 1424 list_del_rcu(&wdev->list); 1425 synchronize_net(); 1426 rdev->devlist_generation++; 1427 1428 cfg80211_mlme_purge_registrations(wdev); 1429 1430 switch (wdev->iftype) { 1431 case NL80211_IFTYPE_P2P_DEVICE: 1432 cfg80211_stop_p2p_device(rdev, wdev); 1433 break; 1434 case NL80211_IFTYPE_NAN: 1435 cfg80211_stop_nan(rdev, wdev); 1436 break; 1437 case NL80211_IFTYPE_PD: 1438 cfg80211_stop_pd(rdev, wdev); 1439 break; 1440 default: 1441 break; 1442 } 1443 1444 #ifdef CONFIG_CFG80211_WEXT 1445 kfree_sensitive(wdev->wext.keys); 1446 wdev->wext.keys = NULL; 1447 #endif 1448 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1449 /* deleted from the list, so can't be found from nl80211 any more */ 1450 cqm_config = rcu_access_pointer(wdev->cqm_config); 1451 kfree_rcu(cqm_config, rcu_head); 1452 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1453 1454 /* 1455 * Ensure that all events have been processed and 1456 * freed. 1457 */ 1458 cfg80211_process_wdev_events(wdev); 1459 1460 if (wdev->iftype == NL80211_IFTYPE_STATION || 1461 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1462 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1463 struct cfg80211_internal_bss *curbss; 1464 1465 curbss = wdev->links[link_id].client.current_bss; 1466 1467 if (WARN_ON(curbss)) { 1468 cfg80211_unhold_bss(curbss); 1469 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1470 wdev->links[link_id].client.current_bss = NULL; 1471 } 1472 } 1473 } 1474 1475 wdev->connected = false; 1476 } 1477 1478 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1479 { 1480 _cfg80211_unregister_wdev(wdev, true); 1481 } 1482 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1483 1484 static const struct device_type wiphy_type = { 1485 .name = "wlan", 1486 }; 1487 1488 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1489 enum nl80211_iftype iftype, int num) 1490 { 1491 lockdep_assert_held(&rdev->wiphy.mtx); 1492 1493 rdev->num_running_ifaces += num; 1494 if (iftype == NL80211_IFTYPE_MONITOR) 1495 rdev->num_running_monitor_ifaces += num; 1496 } 1497 1498 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev, 1499 struct wireless_dev *wdev, int link_id) 1500 { 1501 struct net_device *dev = wdev->netdev; 1502 struct cfg80211_sched_scan_request *pos, *tmp; 1503 1504 lockdep_assert_held(&rdev->wiphy.mtx); 1505 1506 cfg80211_pmsr_wdev_down(wdev); 1507 1508 cfg80211_stop_radar_detection(wdev); 1509 cfg80211_stop_background_radar_detection(wdev); 1510 1511 switch (wdev->iftype) { 1512 case NL80211_IFTYPE_ADHOC: 1513 cfg80211_leave_ibss(rdev, dev, true); 1514 break; 1515 case NL80211_IFTYPE_P2P_CLIENT: 1516 case NL80211_IFTYPE_STATION: 1517 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1518 list) { 1519 if (dev == pos->dev) 1520 cfg80211_stop_sched_scan_req(rdev, pos, false); 1521 } 1522 1523 #ifdef CONFIG_CFG80211_WEXT 1524 kfree(wdev->wext.ie); 1525 wdev->wext.ie = NULL; 1526 wdev->wext.ie_len = 0; 1527 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1528 #endif 1529 cfg80211_disconnect(rdev, dev, 1530 WLAN_REASON_DEAUTH_LEAVING, true); 1531 break; 1532 case NL80211_IFTYPE_MESH_POINT: 1533 cfg80211_leave_mesh(rdev, dev); 1534 break; 1535 case NL80211_IFTYPE_AP: 1536 case NL80211_IFTYPE_P2P_GO: 1537 cfg80211_stop_ap(rdev, dev, link_id, true); 1538 break; 1539 case NL80211_IFTYPE_OCB: 1540 cfg80211_leave_ocb(rdev, dev); 1541 break; 1542 case NL80211_IFTYPE_P2P_DEVICE: 1543 cfg80211_stop_p2p_device(rdev, wdev); 1544 break; 1545 case NL80211_IFTYPE_NAN: 1546 cfg80211_stop_nan(rdev, wdev); 1547 break; 1548 case NL80211_IFTYPE_PD: 1549 cfg80211_stop_pd(rdev, wdev); 1550 break; 1551 case NL80211_IFTYPE_AP_VLAN: 1552 case NL80211_IFTYPE_MONITOR: 1553 case NL80211_IFTYPE_NAN_DATA: 1554 /* nothing to do */ 1555 break; 1556 case NL80211_IFTYPE_UNSPECIFIED: 1557 case NL80211_IFTYPE_WDS: 1558 case NUM_NL80211_IFTYPES: 1559 /* invalid */ 1560 break; 1561 } 1562 } 1563 1564 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1565 struct wireless_dev *wdev, int link_id) 1566 { 1567 ASSERT_RTNL(); 1568 1569 /* NAN_DATA interfaces must be closed before stopping NAN */ 1570 cfg80211_close_dependents(rdev, wdev); 1571 1572 guard(wiphy)(&rdev->wiphy); 1573 1574 cfg80211_leave_locked(rdev, wdev, link_id); 1575 } 1576 1577 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1578 int link_id, gfp_t gfp) 1579 { 1580 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1581 struct cfg80211_event *ev; 1582 unsigned long flags; 1583 1584 /* Only AP/GO interfaces may have a specific link_id */ 1585 if (WARN_ON_ONCE(link_id != -1 && 1586 wdev->iftype != NL80211_IFTYPE_AP && 1587 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1588 link_id = -1; 1589 1590 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1591 1592 if (wdev->iftype == NL80211_IFTYPE_NAN) 1593 return; 1594 1595 ev = kzalloc_obj(*ev, gfp); 1596 if (!ev) 1597 return; 1598 1599 ev->type = EVENT_STOPPED; 1600 ev->link_id = link_id; 1601 1602 spin_lock_irqsave(&wdev->event_lock, flags); 1603 list_add_tail(&ev->list, &wdev->event_list); 1604 spin_unlock_irqrestore(&wdev->event_lock, flags); 1605 queue_work(cfg80211_wq, &rdev->event_work); 1606 } 1607 EXPORT_SYMBOL(cfg80211_stop_link); 1608 1609 void cfg80211_init_wdev(struct wireless_dev *wdev) 1610 { 1611 INIT_LIST_HEAD(&wdev->event_list); 1612 spin_lock_init(&wdev->event_lock); 1613 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1614 INIT_LIST_HEAD(&wdev->pmsr_list); 1615 spin_lock_init(&wdev->pmsr_lock); 1616 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1617 1618 #ifdef CONFIG_CFG80211_WEXT 1619 wdev->wext.default_key = -1; 1620 wdev->wext.default_mgmt_key = -1; 1621 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1622 #endif 1623 1624 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1625 1626 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1627 wdev->ps = true; 1628 else 1629 wdev->ps = false; 1630 /* allow mac80211 to determine the timeout */ 1631 wdev->ps_timeout = -1; 1632 1633 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1634 1635 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1636 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1637 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1638 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1639 1640 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1641 } 1642 1643 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1644 struct wireless_dev *wdev) 1645 { 1646 ASSERT_RTNL(); 1647 lockdep_assert_held(&rdev->wiphy.mtx); 1648 1649 /* 1650 * We get here also when the interface changes network namespaces, 1651 * as it's registered into the new one, but we don't want it to 1652 * change ID in that case. Checking if the ID is already assigned 1653 * works, because 0 isn't considered a valid ID and the memory is 1654 * 0-initialized. 1655 */ 1656 if (!wdev->identifier) 1657 wdev->identifier = ++rdev->wdev_id; 1658 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1659 rdev->devlist_generation++; 1660 wdev->registered = true; 1661 1662 if (wdev->netdev && 1663 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1664 "phy80211")) 1665 pr_err("failed to add phy80211 symlink to netdev!\n"); 1666 1667 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1668 } 1669 1670 int cfg80211_register_netdevice(struct net_device *dev) 1671 { 1672 struct wireless_dev *wdev = dev->ieee80211_ptr; 1673 struct cfg80211_registered_device *rdev; 1674 int ret; 1675 1676 ASSERT_RTNL(); 1677 1678 if (WARN_ON(!wdev)) 1679 return -EINVAL; 1680 1681 rdev = wiphy_to_rdev(wdev->wiphy); 1682 1683 lockdep_assert_held(&rdev->wiphy.mtx); 1684 1685 /* we'll take care of this */ 1686 wdev->registered = true; 1687 wdev->registering = true; 1688 ret = register_netdevice(dev); 1689 if (ret) 1690 goto out; 1691 1692 cfg80211_register_wdev(rdev, wdev); 1693 ret = 0; 1694 out: 1695 wdev->registering = false; 1696 if (ret) 1697 wdev->registered = false; 1698 return ret; 1699 } 1700 EXPORT_SYMBOL(cfg80211_register_netdevice); 1701 1702 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1703 unsigned long state, void *ptr) 1704 { 1705 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1706 struct wireless_dev *wdev = dev->ieee80211_ptr; 1707 struct cfg80211_registered_device *rdev; 1708 struct cfg80211_sched_scan_request *pos, *tmp; 1709 1710 if (!wdev) 1711 return NOTIFY_DONE; 1712 1713 rdev = wiphy_to_rdev(wdev->wiphy); 1714 1715 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1716 1717 switch (state) { 1718 case NETDEV_POST_INIT: 1719 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1720 wdev->netdev = dev; 1721 /* can only change netns with wiphy */ 1722 dev->netns_immutable = true; 1723 1724 cfg80211_init_wdev(wdev); 1725 break; 1726 case NETDEV_REGISTER: 1727 if (!wdev->registered) { 1728 guard(wiphy)(&rdev->wiphy); 1729 1730 cfg80211_register_wdev(rdev, wdev); 1731 } 1732 break; 1733 case NETDEV_UNREGISTER: 1734 /* 1735 * It is possible to get NETDEV_UNREGISTER multiple times, 1736 * so check wdev->registered. 1737 */ 1738 if (wdev->registered && !wdev->registering) { 1739 guard(wiphy)(&rdev->wiphy); 1740 1741 _cfg80211_unregister_wdev(wdev, false); 1742 } 1743 break; 1744 case NETDEV_GOING_DOWN: 1745 cfg80211_leave(rdev, wdev, -1); 1746 scoped_guard(wiphy, &rdev->wiphy) 1747 cfg80211_remove_links(wdev); 1748 /* since we just did cfg80211_leave() nothing to do there */ 1749 cancel_work_sync(&wdev->disconnect_wk); 1750 cancel_work_sync(&wdev->pmsr_free_wk); 1751 break; 1752 case NETDEV_DOWN: 1753 wiphy_lock(&rdev->wiphy); 1754 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1755 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1756 if (WARN_ON(!rdev->scan_req->notified && 1757 (!rdev->int_scan_req || 1758 !rdev->int_scan_req->notified))) 1759 rdev->scan_req->info.aborted = true; 1760 ___cfg80211_scan_done(rdev, false); 1761 } 1762 1763 list_for_each_entry_safe(pos, tmp, 1764 &rdev->sched_scan_req_list, list) { 1765 if (WARN_ON(pos->dev == wdev->netdev)) 1766 cfg80211_stop_sched_scan_req(rdev, pos, false); 1767 } 1768 1769 rdev->opencount--; 1770 wiphy_unlock(&rdev->wiphy); 1771 wake_up(&rdev->dev_wait); 1772 break; 1773 case NETDEV_UP: 1774 wiphy_lock(&rdev->wiphy); 1775 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1776 switch (wdev->iftype) { 1777 #ifdef CONFIG_CFG80211_WEXT 1778 case NL80211_IFTYPE_ADHOC: 1779 cfg80211_ibss_wext_join(rdev, wdev); 1780 break; 1781 case NL80211_IFTYPE_STATION: 1782 cfg80211_mgd_wext_connect(rdev, wdev); 1783 break; 1784 #endif 1785 #ifdef CONFIG_MAC80211_MESH 1786 case NL80211_IFTYPE_MESH_POINT: 1787 { 1788 /* backward compat code... */ 1789 struct mesh_setup setup; 1790 memcpy(&setup, &default_mesh_setup, 1791 sizeof(setup)); 1792 /* back compat only needed for mesh_id */ 1793 setup.mesh_id = wdev->u.mesh.id; 1794 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1795 if (wdev->u.mesh.id_up_len) 1796 __cfg80211_join_mesh(rdev, dev, 1797 &setup, 1798 &default_mesh_config); 1799 break; 1800 } 1801 #endif 1802 default: 1803 break; 1804 } 1805 rdev->opencount++; 1806 1807 /* 1808 * Configure power management to the driver here so that its 1809 * correctly set also after interface type changes etc. 1810 */ 1811 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1812 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1813 rdev->ops->set_power_mgmt && 1814 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1815 wdev->ps_timeout)) { 1816 /* assume this means it's off */ 1817 wdev->ps = false; 1818 } 1819 wiphy_unlock(&rdev->wiphy); 1820 break; 1821 case NETDEV_PRE_UP: 1822 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1823 wdev->use_4addr, 0)) 1824 return notifier_from_errno(-EOPNOTSUPP); 1825 1826 if (rfkill_blocked(rdev->wiphy.rfkill)) 1827 return notifier_from_errno(-ERFKILL); 1828 1829 /* NAN_DATA interfaces require a running NAN interface */ 1830 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { 1831 struct wireless_dev *iter; 1832 bool nan_started = false; 1833 1834 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { 1835 if (iter->iftype == NL80211_IFTYPE_NAN && 1836 wdev_running(iter)) { 1837 nan_started = true; 1838 break; 1839 } 1840 } 1841 1842 if (!nan_started) 1843 return notifier_from_errno(-ENOLINK); 1844 } 1845 break; 1846 default: 1847 return NOTIFY_DONE; 1848 } 1849 1850 wireless_nlevent_flush(); 1851 1852 return NOTIFY_OK; 1853 } 1854 1855 static struct notifier_block cfg80211_netdev_notifier = { 1856 .notifier_call = cfg80211_netdev_notifier_call, 1857 }; 1858 1859 static void __net_exit cfg80211_pernet_exit(struct net *net) 1860 { 1861 struct cfg80211_registered_device *rdev; 1862 1863 rtnl_lock(); 1864 for_each_rdev(rdev) { 1865 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1866 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1867 } 1868 rtnl_unlock(); 1869 } 1870 1871 static struct pernet_operations cfg80211_pernet_ops = { 1872 .exit = cfg80211_pernet_exit, 1873 }; 1874 1875 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1876 { 1877 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1878 unsigned long flags; 1879 1880 trace_wiphy_work_queue(wiphy, work); 1881 1882 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1883 if (list_empty(&work->entry)) 1884 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1885 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1886 1887 queue_work(system_dfl_wq, &rdev->wiphy_work); 1888 } 1889 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1890 1891 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1892 { 1893 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1894 unsigned long flags; 1895 1896 lockdep_assert_held(&wiphy->mtx); 1897 1898 trace_wiphy_work_cancel(wiphy, work); 1899 1900 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1901 if (!list_empty(&work->entry)) 1902 list_del_init(&work->entry); 1903 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1904 } 1905 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 1906 1907 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 1908 { 1909 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1910 unsigned long flags; 1911 bool run; 1912 1913 trace_wiphy_work_flush(wiphy, work); 1914 1915 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1916 run = !work || !list_empty(&work->entry); 1917 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1918 1919 if (run) 1920 cfg80211_process_wiphy_works(rdev, work); 1921 } 1922 EXPORT_SYMBOL_GPL(wiphy_work_flush); 1923 1924 void wiphy_delayed_work_timer(struct timer_list *t) 1925 { 1926 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 1927 1928 wiphy_work_queue(dwork->wiphy, &dwork->work); 1929 } 1930 EXPORT_SYMBOL(wiphy_delayed_work_timer); 1931 1932 void wiphy_delayed_work_queue(struct wiphy *wiphy, 1933 struct wiphy_delayed_work *dwork, 1934 unsigned long delay) 1935 { 1936 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 1937 1938 if (!delay) { 1939 timer_delete(&dwork->timer); 1940 wiphy_work_queue(wiphy, &dwork->work); 1941 return; 1942 } 1943 1944 dwork->wiphy = wiphy; 1945 mod_timer(&dwork->timer, jiffies + delay); 1946 } 1947 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 1948 1949 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 1950 struct wiphy_delayed_work *dwork) 1951 { 1952 lockdep_assert_held(&wiphy->mtx); 1953 1954 timer_delete_sync(&dwork->timer); 1955 wiphy_work_cancel(wiphy, &dwork->work); 1956 } 1957 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 1958 1959 void wiphy_delayed_work_flush(struct wiphy *wiphy, 1960 struct wiphy_delayed_work *dwork) 1961 { 1962 lockdep_assert_held(&wiphy->mtx); 1963 1964 timer_delete_sync(&dwork->timer); 1965 wiphy_work_flush(wiphy, &dwork->work); 1966 } 1967 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 1968 1969 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 1970 struct wiphy_delayed_work *dwork) 1971 { 1972 return timer_pending(&dwork->timer); 1973 } 1974 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 1975 1976 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 1977 { 1978 struct wiphy_hrtimer_work *hrwork = 1979 container_of(t, struct wiphy_hrtimer_work, timer); 1980 1981 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 1982 1983 return HRTIMER_NORESTART; 1984 } 1985 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 1986 1987 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 1988 struct wiphy_hrtimer_work *hrwork, 1989 ktime_t delay) 1990 { 1991 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 1992 1993 if (!delay) { 1994 hrtimer_cancel(&hrwork->timer); 1995 wiphy_work_queue(wiphy, &hrwork->work); 1996 return; 1997 } 1998 1999 hrwork->wiphy = wiphy; 2000 hrtimer_start_range_ns(&hrwork->timer, delay, 2001 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 2002 } 2003 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 2004 2005 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 2006 struct wiphy_hrtimer_work *hrwork) 2007 { 2008 lockdep_assert_held(&wiphy->mtx); 2009 2010 hrtimer_cancel(&hrwork->timer); 2011 wiphy_work_cancel(wiphy, &hrwork->work); 2012 } 2013 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 2014 2015 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 2016 struct wiphy_hrtimer_work *hrwork) 2017 { 2018 lockdep_assert_held(&wiphy->mtx); 2019 2020 hrtimer_cancel(&hrwork->timer); 2021 wiphy_work_flush(wiphy, &hrwork->work); 2022 } 2023 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 2024 2025 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 2026 struct wiphy_hrtimer_work *hrwork) 2027 { 2028 return hrtimer_is_queued(&hrwork->timer); 2029 } 2030 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 2031 2032 static int __init cfg80211_init(void) 2033 { 2034 int err; 2035 2036 err = register_pernet_device(&cfg80211_pernet_ops); 2037 if (err) 2038 goto out_fail_pernet; 2039 2040 err = wiphy_sysfs_init(); 2041 if (err) 2042 goto out_fail_sysfs; 2043 2044 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 2045 if (err) 2046 goto out_fail_notifier; 2047 2048 err = nl80211_init(); 2049 if (err) 2050 goto out_fail_nl80211; 2051 2052 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 2053 2054 err = regulatory_init(); 2055 if (err) 2056 goto out_fail_reg; 2057 2058 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 2059 if (!cfg80211_wq) { 2060 err = -ENOMEM; 2061 goto out_fail_wq; 2062 } 2063 2064 return 0; 2065 2066 out_fail_wq: 2067 regulatory_exit(); 2068 out_fail_reg: 2069 debugfs_remove(ieee80211_debugfs_dir); 2070 nl80211_exit(); 2071 out_fail_nl80211: 2072 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2073 out_fail_notifier: 2074 wiphy_sysfs_exit(); 2075 out_fail_sysfs: 2076 unregister_pernet_device(&cfg80211_pernet_ops); 2077 out_fail_pernet: 2078 return err; 2079 } 2080 fs_initcall(cfg80211_init); 2081 2082 static void __exit cfg80211_exit(void) 2083 { 2084 debugfs_remove(ieee80211_debugfs_dir); 2085 nl80211_exit(); 2086 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2087 wiphy_sysfs_exit(); 2088 regulatory_exit(); 2089 unregister_pernet_device(&cfg80211_pernet_ops); 2090 destroy_workqueue(cfg80211_wq); 2091 } 2092 module_exit(cfg80211_exit); 2093