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 cfg80211_pmsr_wdev_down(wdev); 241 rdev_stop_p2p_device(rdev, wdev); 242 wdev->is_running = false; 243 244 rdev->opencount--; 245 246 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 247 if (WARN_ON(!rdev->scan_req->notified && 248 (!rdev->int_scan_req || 249 !rdev->int_scan_req->notified))) 250 rdev->scan_req->info.aborted = true; 251 ___cfg80211_scan_done(rdev, false); 252 } 253 } 254 255 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 256 struct wireless_dev *wdev) 257 { 258 struct cfg80211_nan_local_sched empty_sched = {}; 259 260 lockdep_assert_held(&rdev->wiphy.mtx); 261 262 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 263 return; 264 265 if (!wdev_running(wdev)) 266 return; 267 268 cfg80211_pmsr_wdev_down(wdev); 269 270 /* 271 * If there is a scheduled update pending, mark it as canceled, so the 272 * empty schedule will be accepted 273 */ 274 wdev->u.nan.sched_update_pending = false; 275 276 /* Unschedule all */ 277 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched); 278 279 rdev_stop_nan(rdev, wdev); 280 wdev->is_running = false; 281 282 eth_zero_addr(wdev->u.nan.cluster_id); 283 284 rdev->opencount--; 285 } 286 287 int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev, 288 struct wireless_dev *wdev, 289 struct cfg80211_nan_local_sched *sched) 290 { 291 int ret; 292 293 lockdep_assert_held(&rdev->wiphy.mtx); 294 295 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) 296 return -EINVAL; 297 298 if (wdev->u.nan.sched_update_pending) 299 return -EBUSY; 300 301 ret = rdev_nan_set_local_sched(rdev, wdev, sched); 302 if (ret) 303 return ret; 304 305 wdev->u.nan.sched_update_pending = sched->deferred; 306 307 kfree(wdev->u.nan.chandefs); 308 wdev->u.nan.chandefs = NULL; 309 wdev->u.nan.n_channels = 0; 310 311 if (!sched->n_channels) 312 return 0; 313 314 wdev->u.nan.chandefs = kzalloc_objs(*wdev->u.nan.chandefs, 315 sched->n_channels); 316 if (!wdev->u.nan.chandefs) 317 return -ENOMEM; 318 319 for (int i = 0; i < sched->n_channels; i++) 320 wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef; 321 322 wdev->u.nan.n_channels = sched->n_channels; 323 324 return 0; 325 } 326 327 void cfg80211_stop_pd(struct cfg80211_registered_device *rdev, 328 struct wireless_dev *wdev) 329 { 330 lockdep_assert_held(&rdev->wiphy.mtx); 331 332 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD)) 333 return; 334 335 if (!rdev->ops->stop_pd) 336 return; 337 338 if (!wdev_running(wdev)) 339 return; 340 341 cfg80211_pmsr_wdev_down(wdev); 342 343 rdev_stop_pd(rdev, wdev); 344 wdev->is_running = false; 345 346 rdev->opencount--; 347 } 348 349 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 350 { 351 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 352 struct wireless_dev *wdev; 353 354 ASSERT_RTNL(); 355 356 /* 357 * Some netdev interfaces need to be closed before some non-netdev 358 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN 359 * interface 360 */ 361 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 362 if (wdev->netdev) { 363 dev_close(wdev->netdev); 364 continue; 365 } 366 } 367 368 guard(wiphy)(wiphy); 369 370 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 371 switch (wdev->iftype) { 372 case NL80211_IFTYPE_P2P_DEVICE: 373 cfg80211_stop_p2p_device(rdev, wdev); 374 break; 375 case NL80211_IFTYPE_NAN: 376 cfg80211_stop_nan(rdev, wdev); 377 break; 378 case NL80211_IFTYPE_PD: 379 cfg80211_stop_pd(rdev, wdev); 380 break; 381 default: 382 break; 383 } 384 } 385 } 386 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 387 388 static int cfg80211_rfkill_set_block(void *data, bool blocked) 389 { 390 struct cfg80211_registered_device *rdev = data; 391 392 if (!blocked) 393 return 0; 394 395 rtnl_lock(); 396 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 397 rtnl_unlock(); 398 399 return 0; 400 } 401 402 static void cfg80211_rfkill_block_work(struct work_struct *work) 403 { 404 struct cfg80211_registered_device *rdev; 405 406 rdev = container_of(work, struct cfg80211_registered_device, 407 rfkill_block); 408 cfg80211_rfkill_set_block(rdev, true); 409 } 410 411 static void cfg80211_event_work(struct work_struct *work) 412 { 413 struct cfg80211_registered_device *rdev; 414 415 rdev = container_of(work, struct cfg80211_registered_device, 416 event_work); 417 418 guard(wiphy)(&rdev->wiphy); 419 420 cfg80211_process_rdev_events(rdev); 421 } 422 423 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 424 { 425 struct wireless_dev *wdev, *tmp; 426 427 ASSERT_RTNL(); 428 429 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 430 if (wdev->nl_owner_dead) { 431 cfg80211_close_dependents(rdev, wdev); 432 433 if (wdev->netdev) 434 dev_close(wdev->netdev); 435 436 guard(wiphy)(&rdev->wiphy); 437 438 cfg80211_remove_virtual_intf(rdev, wdev); 439 } 440 } 441 } 442 443 void cfg80211_close_dependents(struct cfg80211_registered_device *rdev, 444 struct wireless_dev *wdev) 445 { 446 ASSERT_RTNL(); 447 448 if (wdev->iftype != NL80211_IFTYPE_NAN) 449 return; 450 451 /* Close all NAN DATA interfaces */ 452 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 453 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) 454 dev_close(wdev->netdev); 455 } 456 } 457 458 static void cfg80211_destroy_iface_wk(struct work_struct *work) 459 { 460 struct cfg80211_registered_device *rdev; 461 462 rdev = container_of(work, struct cfg80211_registered_device, 463 destroy_work); 464 465 rtnl_lock(); 466 cfg80211_destroy_ifaces(rdev); 467 rtnl_unlock(); 468 } 469 470 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, 471 struct wiphy_work *work) 472 { 473 struct cfg80211_registered_device *rdev; 474 struct cfg80211_sched_scan_request *req, *tmp; 475 476 rdev = container_of(work, struct cfg80211_registered_device, 477 sched_scan_stop_wk); 478 479 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 480 if (req->nl_owner_dead) 481 cfg80211_stop_sched_scan_req(rdev, req, false); 482 } 483 } 484 485 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 486 { 487 struct cfg80211_registered_device *rdev; 488 489 rdev = container_of(work, struct cfg80211_registered_device, 490 propagate_radar_detect_wk); 491 492 rtnl_lock(); 493 494 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 495 NL80211_DFS_UNAVAILABLE, 496 NL80211_RADAR_DETECTED); 497 498 rtnl_unlock(); 499 } 500 501 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 502 { 503 struct cfg80211_registered_device *rdev; 504 505 rdev = container_of(work, struct cfg80211_registered_device, 506 propagate_cac_done_wk); 507 508 rtnl_lock(); 509 510 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 511 NL80211_DFS_AVAILABLE, 512 NL80211_RADAR_CAC_FINISHED); 513 514 rtnl_unlock(); 515 } 516 517 static void cfg80211_wiphy_work(struct work_struct *work) 518 { 519 struct cfg80211_registered_device *rdev; 520 struct wiphy_work *wk; 521 522 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); 523 524 trace_wiphy_work_worker_start(&rdev->wiphy); 525 526 guard(wiphy)(&rdev->wiphy); 527 if (rdev->suspended) 528 return; 529 530 spin_lock_irq(&rdev->wiphy_work_lock); 531 wk = list_first_entry_or_null(&rdev->wiphy_work_list, 532 struct wiphy_work, entry); 533 if (wk) { 534 list_del_init(&wk->entry); 535 if (!list_empty(&rdev->wiphy_work_list)) 536 queue_work(system_dfl_wq, work); 537 spin_unlock_irq(&rdev->wiphy_work_lock); 538 539 trace_wiphy_work_run(&rdev->wiphy, wk); 540 wk->func(&rdev->wiphy, wk); 541 } else { 542 spin_unlock_irq(&rdev->wiphy_work_lock); 543 } 544 } 545 546 /* exported functions */ 547 548 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 549 const char *requested_name) 550 { 551 static atomic_t wiphy_counter = ATOMIC_INIT(0); 552 553 struct cfg80211_registered_device *rdev; 554 int alloc_size; 555 556 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 557 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 558 WARN_ON(ops->connect && !ops->disconnect); 559 WARN_ON(ops->join_ibss && !ops->leave_ibss); 560 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 561 WARN_ON(ops->add_station && !ops->del_station); 562 WARN_ON(ops->add_mpath && !ops->del_mpath); 563 WARN_ON(ops->join_mesh && !ops->leave_mesh); 564 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 565 WARN_ON(ops->start_ap && !ops->stop_ap); 566 WARN_ON(ops->join_ocb && !ops->leave_ocb); 567 WARN_ON(ops->suspend && !ops->resume); 568 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 569 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 570 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 571 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 572 573 alloc_size = sizeof(*rdev) + sizeof_priv; 574 575 rdev = kzalloc(alloc_size, GFP_KERNEL); 576 if (!rdev) 577 return NULL; 578 579 rdev->ops = ops; 580 581 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 582 583 if (unlikely(rdev->wiphy_idx < 0)) { 584 /* ugh, wrapped! */ 585 atomic_dec(&wiphy_counter); 586 kfree(rdev); 587 return NULL; 588 } 589 590 /* atomic_inc_return makes it start at 1, make it start at 0 */ 591 rdev->wiphy_idx--; 592 593 /* give it a proper name */ 594 if (requested_name && requested_name[0]) { 595 int rv; 596 597 rtnl_lock(); 598 rv = cfg80211_dev_check_name(rdev, requested_name); 599 600 if (rv < 0) { 601 rtnl_unlock(); 602 goto use_default_name; 603 } 604 605 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 606 rtnl_unlock(); 607 if (rv) 608 goto use_default_name; 609 } else { 610 int rv; 611 612 use_default_name: 613 /* NOTE: This is *probably* safe w/out holding rtnl because of 614 * the restrictions on phy names. Probably this call could 615 * fail if some other part of the kernel (re)named a device 616 * phyX. But, might should add some locking and check return 617 * value, and use a different name if this one exists? 618 */ 619 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 620 if (rv < 0) { 621 kfree(rdev); 622 return NULL; 623 } 624 } 625 626 mutex_init(&rdev->wiphy.mtx); 627 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 628 INIT_LIST_HEAD(&rdev->beacon_registrations); 629 spin_lock_init(&rdev->beacon_registrations_lock); 630 spin_lock_init(&rdev->bss_lock); 631 INIT_LIST_HEAD(&rdev->bss_list); 632 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 633 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); 634 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 635 cfg80211_dfs_channels_update_work); 636 #ifdef CONFIG_CFG80211_WEXT 637 rdev->wiphy.wext = &cfg80211_wext_handler; 638 #endif 639 640 device_initialize(&rdev->wiphy.dev); 641 rdev->wiphy.dev.class = &ieee80211_class; 642 rdev->wiphy.dev.platform_data = rdev; 643 device_enable_async_suspend(&rdev->wiphy.dev); 644 645 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 646 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 647 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 648 INIT_WORK(&rdev->propagate_radar_detect_wk, 649 cfg80211_propagate_radar_detect_wk); 650 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 651 INIT_WORK(&rdev->mgmt_registrations_update_wk, 652 cfg80211_mgmt_registrations_update_wk); 653 spin_lock_init(&rdev->mgmt_registrations_lock); 654 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); 655 INIT_LIST_HEAD(&rdev->wiphy_work_list); 656 spin_lock_init(&rdev->wiphy_work_lock); 657 658 #ifdef CONFIG_CFG80211_DEFAULT_PS 659 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 660 #endif 661 662 wiphy_net_set(&rdev->wiphy, &init_net); 663 664 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 665 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 666 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 667 &rdev->rfkill_ops, rdev); 668 669 if (!rdev->wiphy.rfkill) { 670 wiphy_free(&rdev->wiphy); 671 return NULL; 672 } 673 674 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 675 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 676 INIT_WORK(&rdev->event_work, cfg80211_event_work); 677 INIT_WORK(&rdev->background_cac_abort_wk, 678 cfg80211_background_cac_abort_wk); 679 INIT_DELAYED_WORK(&rdev->background_cac_done_wk, 680 cfg80211_background_cac_done_wk); 681 682 init_waitqueue_head(&rdev->dev_wait); 683 684 /* 685 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 686 * Fragmentation and RTS threshold are disabled by default with the 687 * special -1 value. 688 */ 689 rdev->wiphy.retry_short = 7; 690 rdev->wiphy.retry_long = 4; 691 rdev->wiphy.frag_threshold = (u32) -1; 692 rdev->wiphy.rts_threshold = (u32) -1; 693 rdev->wiphy.coverage_class = 0; 694 695 rdev->wiphy.max_num_csa_counters = 1; 696 697 rdev->wiphy.max_sched_scan_plans = 1; 698 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 699 700 return &rdev->wiphy; 701 } 702 EXPORT_SYMBOL(wiphy_new_nm); 703 704 static 705 int wiphy_verify_iface_combinations(struct wiphy *wiphy, 706 const struct ieee80211_iface_combination *iface_comb, 707 int n_iface_comb, 708 bool combined_radio) 709 { 710 const struct ieee80211_iface_combination *c; 711 int i, j; 712 713 for (i = 0; i < n_iface_comb; i++) { 714 u32 cnt = 0; 715 u16 all_iftypes = 0; 716 717 c = &iface_comb[i]; 718 719 /* 720 * Combinations with just one interface aren't real, 721 * however we make an exception for DFS. 722 */ 723 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 724 return -EINVAL; 725 726 /* Need at least one channel */ 727 if (WARN_ON(!c->num_different_channels)) 728 return -EINVAL; 729 730 /* DFS only works on one channel. Avoid this check 731 * for multi-radio global combination, since it hold 732 * the capabilities of all radio combinations. 733 */ 734 if (!combined_radio && 735 WARN_ON(c->radar_detect_widths && 736 c->num_different_channels > 1)) 737 return -EINVAL; 738 739 if (WARN_ON(!c->n_limits)) 740 return -EINVAL; 741 742 for (j = 0; j < c->n_limits; j++) { 743 u16 types = c->limits[j].types; 744 745 /* interface types shouldn't overlap */ 746 if (WARN_ON(types & all_iftypes)) 747 return -EINVAL; 748 all_iftypes |= types; 749 750 if (WARN_ON(!c->limits[j].max)) 751 return -EINVAL; 752 753 /* Shouldn't list software iftypes in combinations! */ 754 if (WARN_ON(wiphy->software_iftypes & types)) 755 return -EINVAL; 756 757 /* Only a single P2P_DEVICE can be allowed, avoid this 758 * check for multi-radio global combination, since it 759 * hold the capabilities of all radio combinations. 760 */ 761 if (!combined_radio && 762 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 763 c->limits[j].max > 1)) 764 return -EINVAL; 765 766 /* Only a single NAN can be allowed */ 767 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 768 c->limits[j].max > 1)) 769 return -EINVAL; 770 771 /* 772 * This isn't well-defined right now. If you have an 773 * IBSS interface, then its beacon interval may change 774 * by joining other networks, and nothing prevents it 775 * from doing that. 776 * So technically we probably shouldn't even allow AP 777 * and IBSS in the same interface, but it seems that 778 * some drivers support that, possibly only with fixed 779 * beacon intervals for IBSS. 780 */ 781 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 782 c->beacon_int_min_gcd)) { 783 return -EINVAL; 784 } 785 786 cnt += c->limits[j].max; 787 /* 788 * Don't advertise an unsupported type 789 * in a combination. 790 */ 791 if (WARN_ON((wiphy->interface_modes & types) != types)) 792 return -EINVAL; 793 } 794 795 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 796 return -EINVAL; 797 798 /* You can't even choose that many! */ 799 if (WARN_ON(cnt < c->max_interfaces)) 800 return -EINVAL; 801 } 802 803 return 0; 804 } 805 806 static int wiphy_verify_combinations(struct wiphy *wiphy) 807 { 808 int i, ret; 809 bool combined_radio = false; 810 811 if (wiphy->n_radio) { 812 for (i = 0; i < wiphy->n_radio; i++) { 813 const struct wiphy_radio *radio = &wiphy->radio[i]; 814 815 ret = wiphy_verify_iface_combinations(wiphy, 816 radio->iface_combinations, 817 radio->n_iface_combinations, 818 false); 819 if (ret) 820 return ret; 821 } 822 823 combined_radio = true; 824 } 825 826 ret = wiphy_verify_iface_combinations(wiphy, 827 wiphy->iface_combinations, 828 wiphy->n_iface_combinations, 829 combined_radio); 830 831 return ret; 832 } 833 834 static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy) 835 { 836 int i, j; 837 838 if (wiphy->n_cipher_suites && !wiphy->cipher_suites) 839 return false; 840 841 for (i = 0; i < wiphy->n_cipher_suites; i++) { 842 for (j = 0; j < i; j++) { 843 if (wiphy->cipher_suites[i] == 844 wiphy->cipher_suites[j]) 845 return false; 846 } 847 } 848 849 return true; 850 } 851 852 int wiphy_register(struct wiphy *wiphy) 853 { 854 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 855 int res; 856 enum nl80211_band band; 857 struct ieee80211_supported_band *sband; 858 bool have_band = false; 859 int i; 860 u16 ifmodes = wiphy->interface_modes; 861 862 #ifdef CONFIG_PM 863 if (WARN_ON(wiphy->wowlan && 864 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 865 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 866 return -EINVAL; 867 if (WARN_ON(wiphy->wowlan && 868 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 869 !wiphy->wowlan->tcp)) 870 return -EINVAL; 871 #endif 872 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 873 (!rdev->ops->tdls_channel_switch || 874 !rdev->ops->tdls_cancel_channel_switch))) 875 return -EINVAL; 876 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) && 877 (!rdev->ops->start_pd || !rdev->ops->stop_pd))) 878 return -EINVAL; 879 880 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 881 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 882 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 883 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 884 return -EINVAL; 885 886 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) && 887 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1))) 888 return -EINVAL; 889 890 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 891 return -EINVAL; 892 893 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 894 return -EINVAL; 895 896 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 897 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 898 !wiphy->pmsr_capa->ftm.non_asap)) 899 return -EINVAL; 900 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 901 !wiphy->pmsr_capa->ftm.bandwidths)) 902 return -EINVAL; 903 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 904 ~(BIT(NL80211_PREAMBLE_LEGACY) | 905 BIT(NL80211_PREAMBLE_HT) | 906 BIT(NL80211_PREAMBLE_VHT) | 907 BIT(NL80211_PREAMBLE_HE) | 908 BIT(NL80211_PREAMBLE_DMG)))) 909 return -EINVAL; 910 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 911 wiphy->pmsr_capa->ftm.non_trigger_based) && 912 !(wiphy->pmsr_capa->ftm.preambles & 913 BIT(NL80211_PREAMBLE_HE)))) 914 return -EINVAL; 915 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 916 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 917 BIT(NL80211_CHAN_WIDTH_20) | 918 BIT(NL80211_CHAN_WIDTH_40) | 919 BIT(NL80211_CHAN_WIDTH_80) | 920 BIT(NL80211_CHAN_WIDTH_80P80) | 921 BIT(NL80211_CHAN_WIDTH_160) | 922 BIT(NL80211_CHAN_WIDTH_320)))) 923 return -EINVAL; 924 } 925 926 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 927 (wiphy->regulatory_flags & 928 (REGULATORY_CUSTOM_REG | 929 REGULATORY_STRICT_REG | 930 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 931 REGULATORY_COUNTRY_IE_IGNORE)))) 932 return -EINVAL; 933 934 if (WARN_ON(wiphy->coalesce && 935 (!wiphy->coalesce->n_rules || 936 !wiphy->coalesce->n_patterns) && 937 (!wiphy->coalesce->pattern_min_len || 938 wiphy->coalesce->pattern_min_len > 939 wiphy->coalesce->pattern_max_len))) 940 return -EINVAL; 941 942 if (WARN_ON(wiphy->ap_sme_capa && 943 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 944 return -EINVAL; 945 946 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 947 return -EINVAL; 948 949 if (WARN_ON(wiphy->addresses && 950 !is_zero_ether_addr(wiphy->perm_addr) && 951 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 952 ETH_ALEN))) 953 return -EINVAL; 954 955 if (WARN_ON(wiphy->max_acl_mac_addrs && 956 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 957 !rdev->ops->set_mac_acl))) 958 return -EINVAL; 959 960 /* assure only valid behaviours are flagged by driver 961 * hence subtract 2 as bit 0 is invalid. 962 */ 963 if (WARN_ON(wiphy->bss_select_support && 964 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 965 return -EINVAL; 966 967 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 968 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 969 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 970 return -EINVAL; 971 972 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 973 rdev->ops->update_connect_params)) 974 return -EINVAL; 975 976 if (wiphy->addresses) 977 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 978 979 /* sanity check ifmodes */ 980 WARN_ON(!ifmodes); 981 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 982 if (WARN_ON(ifmodes != wiphy->interface_modes)) 983 wiphy->interface_modes = ifmodes; 984 985 res = wiphy_verify_combinations(wiphy); 986 if (res) 987 return res; 988 989 if (!wiphy_cipher_suites_valid(wiphy)) 990 return -EINVAL; 991 992 /* sanity check supported bands/channels */ 993 for (band = 0; band < NUM_NL80211_BANDS; band++) { 994 const struct ieee80211_sband_iftype_data *iftd; 995 u16 types = 0; 996 bool have_he = false; 997 998 sband = wiphy->bands[band]; 999 if (!sband) 1000 continue; 1001 1002 sband->band = band; 1003 if (WARN_ON(!sband->n_channels)) 1004 return -EINVAL; 1005 /* 1006 * on 60GHz or sub-1Ghz band, there are no legacy rates, so 1007 * n_bitrates is 0 1008 */ 1009 if (WARN_ON((band != NL80211_BAND_60GHZ && 1010 band != NL80211_BAND_S1GHZ) && 1011 !sband->n_bitrates)) 1012 return -EINVAL; 1013 1014 if (WARN_ON(band == NL80211_BAND_6GHZ && 1015 (sband->ht_cap.ht_supported || 1016 sband->vht_cap.vht_supported))) 1017 return -EINVAL; 1018 1019 /* 1020 * Since cfg80211_disable_40mhz_24ghz is global, we can 1021 * modify the sband's ht data even if the driver uses a 1022 * global structure for that. 1023 */ 1024 if (cfg80211_disable_40mhz_24ghz && 1025 band == NL80211_BAND_2GHZ && 1026 sband->ht_cap.ht_supported) { 1027 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1028 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 1029 } 1030 1031 /* 1032 * Since we use a u32 for rate bitmaps in 1033 * ieee80211_get_response_rate, we cannot 1034 * have more than 32 legacy rates. 1035 */ 1036 if (WARN_ON(sband->n_bitrates > 32)) 1037 return -EINVAL; 1038 1039 for (i = 0; i < sband->n_channels; i++) { 1040 sband->channels[i].orig_flags = 1041 sband->channels[i].flags; 1042 sband->channels[i].orig_mag = INT_MAX; 1043 sband->channels[i].orig_mpwr = 1044 sband->channels[i].max_power; 1045 sband->channels[i].band = band; 1046 1047 if (WARN_ON(sband->channels[i].freq_offset >= 1000)) 1048 return -EINVAL; 1049 } 1050 1051 for_each_sband_iftype_data(sband, i, iftd) { 1052 bool has_ap, has_non_ap; 1053 u32 ap_bits = BIT(NL80211_IFTYPE_AP) | 1054 BIT(NL80211_IFTYPE_P2P_GO); 1055 1056 if (WARN_ON(!iftd->types_mask)) 1057 return -EINVAL; 1058 if (WARN_ON(types & iftd->types_mask)) 1059 return -EINVAL; 1060 1061 /* at least one piece of information must be present */ 1062 if (WARN_ON(!iftd->he_cap.has_he)) 1063 return -EINVAL; 1064 1065 types |= iftd->types_mask; 1066 1067 if (i == 0) 1068 have_he = iftd->he_cap.has_he; 1069 else 1070 have_he = have_he && 1071 iftd->he_cap.has_he; 1072 1073 has_ap = iftd->types_mask & ap_bits; 1074 has_non_ap = iftd->types_mask & ~ap_bits; 1075 1076 /* 1077 * For EHT 20 MHz STA, the capabilities format differs 1078 * but to simplify, don't check 20 MHz but rather check 1079 * only if AP and non-AP were mentioned at the same time, 1080 * reject if so. 1081 */ 1082 if (WARN_ON(iftd->eht_cap.has_eht && 1083 has_ap && has_non_ap)) 1084 return -EINVAL; 1085 } 1086 1087 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) 1088 return -EINVAL; 1089 1090 have_band = true; 1091 } 1092 1093 if (!have_band) { 1094 WARN_ON(1); 1095 return -EINVAL; 1096 } 1097 1098 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 1099 /* 1100 * Validate we have a policy (can be explicitly set to 1101 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 1102 * we have at least one of doit/dumpit. 1103 */ 1104 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 1105 return -EINVAL; 1106 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 1107 !rdev->wiphy.vendor_commands[i].dumpit)) 1108 return -EINVAL; 1109 } 1110 1111 #ifdef CONFIG_PM 1112 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 1113 (!rdev->wiphy.wowlan->pattern_min_len || 1114 rdev->wiphy.wowlan->pattern_min_len > 1115 rdev->wiphy.wowlan->pattern_max_len))) 1116 return -EINVAL; 1117 #endif 1118 1119 if (!wiphy->max_num_akm_suites) 1120 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; 1121 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || 1122 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) 1123 return -EINVAL; 1124 1125 /* Allocate radio configuration space for multi-radio wiphy */ 1126 if (wiphy->n_radio > 0) { 1127 int idx; 1128 1129 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg, 1130 wiphy->n_radio); 1131 if (!wiphy->radio_cfg) 1132 return -ENOMEM; 1133 /* 1134 * Initialize wiphy radio parameters to IEEE 802.11 1135 * MIB default values. RTS threshold is disabled by 1136 * default with the special -1 value. 1137 */ 1138 for (idx = 0; idx < wiphy->n_radio; idx++) 1139 wiphy->radio_cfg[idx].rts_threshold = (u32)-1; 1140 } 1141 1142 /* check and set up bitrates */ 1143 ieee80211_set_bitrate_flags(wiphy); 1144 1145 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 1146 1147 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) 1148 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; 1149 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) 1150 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; 1151 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) 1152 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; 1153 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) 1154 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS; 1155 1156 rtnl_lock(); 1157 wiphy_lock(&rdev->wiphy); 1158 res = device_add(&rdev->wiphy.dev); 1159 if (res) { 1160 wiphy_unlock(&rdev->wiphy); 1161 rtnl_unlock(); 1162 return res; 1163 } 1164 1165 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 1166 cfg80211_rdev_list_generation++; 1167 1168 /* add to debugfs */ 1169 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 1170 ieee80211_debugfs_dir); 1171 if (wiphy->n_radio > 0) { 1172 int idx; 1173 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN]; 1174 1175 for (idx = 0; idx < wiphy->n_radio; idx++) { 1176 scnprintf(radio_name, sizeof(radio_name), "radio%d", 1177 idx); 1178 wiphy->radio_cfg[idx].radio_debugfsdir = 1179 debugfs_create_dir(radio_name, 1180 rdev->wiphy.debugfsdir); 1181 } 1182 } 1183 1184 cfg80211_debugfs_rdev_add(rdev); 1185 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 1186 wiphy_unlock(&rdev->wiphy); 1187 1188 /* set up regulatory info */ 1189 wiphy_regulatory_register(wiphy); 1190 1191 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1192 struct regulatory_request request = { 1193 .wiphy_idx = get_wiphy_idx(wiphy), 1194 .initiator = NL80211_REGDOM_SET_BY_DRIVER, 1195 .alpha2[0] = '9', 1196 .alpha2[1] = '9', 1197 }; 1198 1199 nl80211_send_reg_change_event(&request); 1200 } 1201 1202 /* Check that nobody globally advertises any capabilities they do not 1203 * advertise on all possible interface types. 1204 */ 1205 if (wiphy->extended_capabilities_len && 1206 wiphy->num_iftype_ext_capab && 1207 wiphy->iftype_ext_capab) { 1208 u8 supported_on_all, j; 1209 const struct wiphy_iftype_ext_capab *capab; 1210 1211 capab = wiphy->iftype_ext_capab; 1212 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 1213 if (capab[0].extended_capabilities_len > j) 1214 supported_on_all = 1215 capab[0].extended_capabilities[j]; 1216 else 1217 supported_on_all = 0x00; 1218 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 1219 if (j >= capab[i].extended_capabilities_len) { 1220 supported_on_all = 0x00; 1221 break; 1222 } 1223 supported_on_all &= 1224 capab[i].extended_capabilities[j]; 1225 } 1226 if (WARN_ON(wiphy->extended_capabilities[j] & 1227 ~supported_on_all)) 1228 break; 1229 } 1230 } 1231 1232 rdev->wiphy.registered = true; 1233 rtnl_unlock(); 1234 1235 res = rfkill_register(rdev->wiphy.rfkill); 1236 if (res) { 1237 rfkill_destroy(rdev->wiphy.rfkill); 1238 rdev->wiphy.rfkill = NULL; 1239 wiphy_unregister(&rdev->wiphy); 1240 return res; 1241 } 1242 1243 return 0; 1244 } 1245 EXPORT_SYMBOL(wiphy_register); 1246 1247 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 1248 { 1249 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1250 1251 if (!rdev->ops->rfkill_poll) 1252 return; 1253 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 1254 rfkill_resume_polling(wiphy->rfkill); 1255 } 1256 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 1257 1258 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 1259 struct wiphy_work *end) 1260 { 1261 unsigned int runaway_limit = 100; 1262 unsigned long flags; 1263 1264 lockdep_assert_held(&rdev->wiphy.mtx); 1265 1266 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1267 while (!list_empty(&rdev->wiphy_work_list)) { 1268 struct wiphy_work *wk; 1269 1270 wk = list_first_entry(&rdev->wiphy_work_list, 1271 struct wiphy_work, entry); 1272 list_del_init(&wk->entry); 1273 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1274 1275 trace_wiphy_work_run(&rdev->wiphy, wk); 1276 wk->func(&rdev->wiphy, wk); 1277 1278 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1279 1280 if (wk == end) 1281 break; 1282 1283 if (WARN_ON(--runaway_limit == 0)) 1284 INIT_LIST_HEAD(&rdev->wiphy_work_list); 1285 } 1286 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1287 } 1288 1289 void wiphy_unregister(struct wiphy *wiphy) 1290 { 1291 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1292 1293 wait_event(rdev->dev_wait, ({ 1294 int __count; 1295 wiphy_lock(&rdev->wiphy); 1296 __count = rdev->opencount; 1297 wiphy_unlock(&rdev->wiphy); 1298 __count == 0; })); 1299 1300 if (rdev->wiphy.rfkill) 1301 rfkill_unregister(rdev->wiphy.rfkill); 1302 1303 rtnl_lock(); 1304 wiphy_lock(&rdev->wiphy); 1305 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1306 rdev->wiphy.registered = false; 1307 1308 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1309 1310 /* 1311 * First remove the hardware from everywhere, this makes 1312 * it impossible to find from userspace. 1313 */ 1314 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1315 list_del_rcu(&rdev->list); 1316 synchronize_rcu(); 1317 1318 /* 1319 * If this device got a regulatory hint tell core its 1320 * free to listen now to a new shiny device regulatory hint 1321 */ 1322 wiphy_regulatory_deregister(wiphy); 1323 1324 cfg80211_rdev_list_generation++; 1325 device_del(&rdev->wiphy.dev); 1326 1327 #ifdef CONFIG_PM 1328 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1329 rdev_set_wakeup(rdev, false); 1330 #endif 1331 1332 /* surely nothing is reachable now, clean up work */ 1333 cfg80211_process_wiphy_works(rdev, NULL); 1334 wiphy_unlock(&rdev->wiphy); 1335 rtnl_unlock(); 1336 1337 /* this has nothing to do now but make sure it's gone */ 1338 cancel_work_sync(&rdev->wiphy_work); 1339 1340 cancel_work_sync(&rdev->sched_scan_res_wk); 1341 cancel_work_sync(&rdev->rfkill_block); 1342 cancel_work_sync(&rdev->conn_work); 1343 flush_work(&rdev->event_work); 1344 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1345 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1346 flush_work(&rdev->destroy_work); 1347 flush_work(&rdev->propagate_radar_detect_wk); 1348 flush_work(&rdev->propagate_cac_done_wk); 1349 flush_work(&rdev->mgmt_registrations_update_wk); 1350 flush_work(&rdev->background_cac_abort_wk); 1351 1352 cfg80211_rdev_free_wowlan(rdev); 1353 cfg80211_free_coalesce(rdev->coalesce); 1354 rdev->coalesce = NULL; 1355 } 1356 EXPORT_SYMBOL(wiphy_unregister); 1357 1358 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1359 { 1360 struct cfg80211_internal_bss *scan, *tmp; 1361 struct cfg80211_beacon_registration *reg, *treg; 1362 unsigned long flags; 1363 1364 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1365 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1366 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1367 cancel_work_sync(&rdev->wiphy_work); 1368 1369 rfkill_destroy(rdev->wiphy.rfkill); 1370 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1371 list_del(®->list); 1372 kfree(reg); 1373 } 1374 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1375 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1376 mutex_destroy(&rdev->wiphy.mtx); 1377 1378 /* 1379 * The 'regd' can only be non-NULL if we never finished 1380 * initializing the wiphy and thus never went through the 1381 * unregister path - e.g. in failure scenarios. Thus, it 1382 * cannot have been visible to anyone if non-NULL, so we 1383 * can just free it here. 1384 */ 1385 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1386 1387 kfree(rdev); 1388 } 1389 1390 void wiphy_free(struct wiphy *wiphy) 1391 { 1392 kfree(wiphy->radio_cfg); 1393 put_device(&wiphy->dev); 1394 } 1395 EXPORT_SYMBOL(wiphy_free); 1396 1397 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1398 enum rfkill_hard_block_reasons reason) 1399 { 1400 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1401 1402 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1403 schedule_work(&rdev->rfkill_block); 1404 } 1405 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1406 1407 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1408 bool unregister_netdev) 1409 { 1410 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1411 struct cfg80211_cqm_config *cqm_config; 1412 unsigned int link_id; 1413 1414 ASSERT_RTNL(); 1415 lockdep_assert_held(&rdev->wiphy.mtx); 1416 1417 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1418 1419 wdev->registered = false; 1420 1421 if (wdev->netdev) { 1422 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1423 if (unregister_netdev) 1424 unregister_netdevice(wdev->netdev); 1425 } 1426 1427 list_del_rcu(&wdev->list); 1428 synchronize_net(); 1429 rdev->devlist_generation++; 1430 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1431 1432 cfg80211_mlme_purge_registrations(wdev); 1433 1434 switch (wdev->iftype) { 1435 case NL80211_IFTYPE_P2P_DEVICE: 1436 cfg80211_stop_p2p_device(rdev, wdev); 1437 break; 1438 case NL80211_IFTYPE_NAN: 1439 cfg80211_stop_nan(rdev, wdev); 1440 break; 1441 case NL80211_IFTYPE_PD: 1442 cfg80211_stop_pd(rdev, wdev); 1443 break; 1444 default: 1445 break; 1446 } 1447 1448 #ifdef CONFIG_CFG80211_WEXT 1449 kfree_sensitive(wdev->wext.keys); 1450 wdev->wext.keys = NULL; 1451 #endif 1452 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1453 /* deleted from the list, so can't be found from nl80211 any more */ 1454 cqm_config = rcu_access_pointer(wdev->cqm_config); 1455 kfree_rcu(cqm_config, rcu_head); 1456 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1457 1458 /* 1459 * Ensure that all events have been processed and 1460 * freed. 1461 */ 1462 cfg80211_process_wdev_events(wdev); 1463 1464 if (wdev->iftype == NL80211_IFTYPE_STATION || 1465 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1466 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1467 struct cfg80211_internal_bss *curbss; 1468 1469 curbss = wdev->links[link_id].client.current_bss; 1470 1471 if (WARN_ON(curbss)) { 1472 cfg80211_unhold_bss(curbss); 1473 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1474 wdev->links[link_id].client.current_bss = NULL; 1475 } 1476 } 1477 } 1478 1479 wdev->connected = false; 1480 } 1481 1482 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1483 { 1484 _cfg80211_unregister_wdev(wdev, true); 1485 } 1486 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1487 1488 static const struct device_type wiphy_type = { 1489 .name = "wlan", 1490 }; 1491 1492 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1493 enum nl80211_iftype iftype, int num) 1494 { 1495 lockdep_assert_held(&rdev->wiphy.mtx); 1496 1497 rdev->num_running_ifaces += num; 1498 if (iftype == NL80211_IFTYPE_MONITOR) 1499 rdev->num_running_monitor_ifaces += num; 1500 } 1501 1502 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev, 1503 struct wireless_dev *wdev, int link_id) 1504 { 1505 struct net_device *dev = wdev->netdev; 1506 struct cfg80211_sched_scan_request *pos, *tmp; 1507 1508 lockdep_assert_held(&rdev->wiphy.mtx); 1509 1510 cfg80211_pmsr_wdev_down(wdev); 1511 1512 cfg80211_stop_radar_detection(wdev); 1513 cfg80211_stop_background_radar_detection(wdev); 1514 1515 switch (wdev->iftype) { 1516 case NL80211_IFTYPE_ADHOC: 1517 cfg80211_leave_ibss(rdev, dev, true); 1518 break; 1519 case NL80211_IFTYPE_P2P_CLIENT: 1520 case NL80211_IFTYPE_STATION: 1521 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1522 list) { 1523 if (dev == pos->dev) 1524 cfg80211_stop_sched_scan_req(rdev, pos, false); 1525 } 1526 1527 #ifdef CONFIG_CFG80211_WEXT 1528 kfree(wdev->wext.ie); 1529 wdev->wext.ie = NULL; 1530 wdev->wext.ie_len = 0; 1531 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1532 #endif 1533 cfg80211_disconnect(rdev, dev, 1534 WLAN_REASON_DEAUTH_LEAVING, true); 1535 break; 1536 case NL80211_IFTYPE_MESH_POINT: 1537 cfg80211_leave_mesh(rdev, dev); 1538 break; 1539 case NL80211_IFTYPE_AP: 1540 case NL80211_IFTYPE_P2P_GO: 1541 cfg80211_stop_ap(rdev, dev, link_id, true); 1542 break; 1543 case NL80211_IFTYPE_OCB: 1544 cfg80211_leave_ocb(rdev, dev); 1545 break; 1546 case NL80211_IFTYPE_P2P_DEVICE: 1547 cfg80211_stop_p2p_device(rdev, wdev); 1548 break; 1549 case NL80211_IFTYPE_NAN: 1550 cfg80211_stop_nan(rdev, wdev); 1551 break; 1552 case NL80211_IFTYPE_PD: 1553 cfg80211_stop_pd(rdev, wdev); 1554 break; 1555 case NL80211_IFTYPE_AP_VLAN: 1556 case NL80211_IFTYPE_MONITOR: 1557 case NL80211_IFTYPE_NAN_DATA: 1558 /* nothing to do */ 1559 break; 1560 case NL80211_IFTYPE_UNSPECIFIED: 1561 case NL80211_IFTYPE_WDS: 1562 case NUM_NL80211_IFTYPES: 1563 /* invalid */ 1564 break; 1565 } 1566 } 1567 1568 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1569 struct wireless_dev *wdev, int link_id) 1570 { 1571 ASSERT_RTNL(); 1572 1573 /* NAN_DATA interfaces must be closed before stopping NAN */ 1574 cfg80211_close_dependents(rdev, wdev); 1575 1576 guard(wiphy)(&rdev->wiphy); 1577 1578 cfg80211_leave_locked(rdev, wdev, link_id); 1579 } 1580 1581 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1582 int link_id, gfp_t gfp) 1583 { 1584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1585 struct cfg80211_event *ev; 1586 unsigned long flags; 1587 1588 /* Only AP/GO interfaces may have a specific link_id */ 1589 if (WARN_ON_ONCE(link_id != -1 && 1590 wdev->iftype != NL80211_IFTYPE_AP && 1591 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1592 link_id = -1; 1593 1594 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1595 1596 if (wdev->iftype == NL80211_IFTYPE_NAN) 1597 return; 1598 1599 ev = kzalloc_obj(*ev, gfp); 1600 if (!ev) 1601 return; 1602 1603 ev->type = EVENT_STOPPED; 1604 ev->link_id = link_id; 1605 1606 spin_lock_irqsave(&wdev->event_lock, flags); 1607 list_add_tail(&ev->list, &wdev->event_list); 1608 spin_unlock_irqrestore(&wdev->event_lock, flags); 1609 queue_work(cfg80211_wq, &rdev->event_work); 1610 } 1611 EXPORT_SYMBOL(cfg80211_stop_link); 1612 1613 void cfg80211_init_wdev(struct wireless_dev *wdev) 1614 { 1615 INIT_LIST_HEAD(&wdev->event_list); 1616 spin_lock_init(&wdev->event_lock); 1617 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1618 INIT_LIST_HEAD(&wdev->pmsr_list); 1619 spin_lock_init(&wdev->pmsr_lock); 1620 wiphy_work_init(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1621 1622 #ifdef CONFIG_CFG80211_WEXT 1623 wdev->wext.default_key = -1; 1624 wdev->wext.default_mgmt_key = -1; 1625 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1626 #endif 1627 1628 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1629 1630 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1631 wdev->ps = true; 1632 else 1633 wdev->ps = false; 1634 /* allow mac80211 to determine the timeout */ 1635 wdev->ps_timeout = -1; 1636 1637 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1638 1639 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1640 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1641 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1642 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1643 1644 wiphy_work_init(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1645 } 1646 1647 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1648 struct wireless_dev *wdev) 1649 { 1650 ASSERT_RTNL(); 1651 lockdep_assert_held(&rdev->wiphy.mtx); 1652 1653 /* 1654 * We get here also when the interface changes network namespaces, 1655 * as it's registered into the new one, but we don't want it to 1656 * change ID in that case. Checking if the ID is already assigned 1657 * works, because 0 isn't considered a valid ID and the memory is 1658 * 0-initialized. 1659 */ 1660 if (!wdev->identifier) 1661 wdev->identifier = ++rdev->wdev_id; 1662 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1663 rdev->devlist_generation++; 1664 wdev->registered = true; 1665 1666 if (wdev->netdev && 1667 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1668 "phy80211")) 1669 pr_err("failed to add phy80211 symlink to netdev!\n"); 1670 1671 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1672 } 1673 1674 int cfg80211_register_netdevice(struct net_device *dev) 1675 { 1676 struct wireless_dev *wdev = dev->ieee80211_ptr; 1677 struct cfg80211_registered_device *rdev; 1678 int ret; 1679 1680 ASSERT_RTNL(); 1681 1682 if (WARN_ON(!wdev)) 1683 return -EINVAL; 1684 1685 rdev = wiphy_to_rdev(wdev->wiphy); 1686 1687 lockdep_assert_held(&rdev->wiphy.mtx); 1688 1689 /* we'll take care of this */ 1690 wdev->registered = true; 1691 wdev->registering = true; 1692 ret = register_netdevice(dev); 1693 if (ret) 1694 goto out; 1695 1696 cfg80211_register_wdev(rdev, wdev); 1697 ret = 0; 1698 out: 1699 wdev->registering = false; 1700 if (ret) 1701 wdev->registered = false; 1702 return ret; 1703 } 1704 EXPORT_SYMBOL(cfg80211_register_netdevice); 1705 1706 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1707 unsigned long state, void *ptr) 1708 { 1709 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1710 struct wireless_dev *wdev = dev->ieee80211_ptr; 1711 struct cfg80211_registered_device *rdev; 1712 struct cfg80211_sched_scan_request *pos, *tmp; 1713 1714 if (!wdev) 1715 return NOTIFY_DONE; 1716 1717 rdev = wiphy_to_rdev(wdev->wiphy); 1718 1719 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1720 1721 switch (state) { 1722 case NETDEV_POST_INIT: 1723 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1724 wdev->netdev = dev; 1725 /* can only change netns with wiphy */ 1726 dev->netns_immutable = true; 1727 1728 cfg80211_init_wdev(wdev); 1729 break; 1730 case NETDEV_REGISTER: 1731 if (!wdev->registered) { 1732 guard(wiphy)(&rdev->wiphy); 1733 1734 cfg80211_register_wdev(rdev, wdev); 1735 } 1736 break; 1737 case NETDEV_UNREGISTER: 1738 /* 1739 * It is possible to get NETDEV_UNREGISTER multiple times, 1740 * so check wdev->registered. 1741 */ 1742 if (wdev->registered && !wdev->registering) { 1743 guard(wiphy)(&rdev->wiphy); 1744 1745 _cfg80211_unregister_wdev(wdev, false); 1746 } 1747 break; 1748 case NETDEV_GOING_DOWN: 1749 cfg80211_leave(rdev, wdev, -1); 1750 scoped_guard(wiphy, &rdev->wiphy) { 1751 cfg80211_remove_links(wdev); 1752 /* since we just did cfg80211_leave() nothing to do there */ 1753 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk); 1754 } 1755 break; 1756 case NETDEV_DOWN: 1757 wiphy_lock(&rdev->wiphy); 1758 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1759 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1760 if (WARN_ON(!rdev->scan_req->notified && 1761 (!rdev->int_scan_req || 1762 !rdev->int_scan_req->notified))) 1763 rdev->scan_req->info.aborted = true; 1764 ___cfg80211_scan_done(rdev, false); 1765 } 1766 1767 list_for_each_entry_safe(pos, tmp, 1768 &rdev->sched_scan_req_list, list) { 1769 if (WARN_ON(pos->dev == wdev->netdev)) 1770 cfg80211_stop_sched_scan_req(rdev, pos, false); 1771 } 1772 1773 rdev->opencount--; 1774 wiphy_unlock(&rdev->wiphy); 1775 wake_up(&rdev->dev_wait); 1776 break; 1777 case NETDEV_UP: 1778 wiphy_lock(&rdev->wiphy); 1779 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1780 switch (wdev->iftype) { 1781 #ifdef CONFIG_CFG80211_WEXT 1782 case NL80211_IFTYPE_ADHOC: 1783 cfg80211_ibss_wext_join(rdev, wdev); 1784 break; 1785 case NL80211_IFTYPE_STATION: 1786 cfg80211_mgd_wext_connect(rdev, wdev); 1787 break; 1788 #endif 1789 #ifdef CONFIG_MAC80211_MESH 1790 case NL80211_IFTYPE_MESH_POINT: 1791 { 1792 /* backward compat code... */ 1793 struct mesh_setup setup; 1794 memcpy(&setup, &default_mesh_setup, 1795 sizeof(setup)); 1796 /* back compat only needed for mesh_id */ 1797 setup.mesh_id = wdev->u.mesh.id; 1798 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1799 if (wdev->u.mesh.id_up_len) 1800 __cfg80211_join_mesh(rdev, dev, 1801 &setup, 1802 &default_mesh_config); 1803 break; 1804 } 1805 #endif 1806 default: 1807 break; 1808 } 1809 rdev->opencount++; 1810 1811 /* 1812 * Configure power management to the driver here so that its 1813 * correctly set also after interface type changes etc. 1814 */ 1815 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1816 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1817 rdev->ops->set_power_mgmt && 1818 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1819 wdev->ps_timeout)) { 1820 /* assume this means it's off */ 1821 wdev->ps = false; 1822 } 1823 wiphy_unlock(&rdev->wiphy); 1824 break; 1825 case NETDEV_PRE_UP: 1826 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1827 wdev->use_4addr, 0)) 1828 return notifier_from_errno(-EOPNOTSUPP); 1829 1830 if (rfkill_blocked(rdev->wiphy.rfkill)) 1831 return notifier_from_errno(-ERFKILL); 1832 1833 /* NAN_DATA interfaces require a running NAN interface */ 1834 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { 1835 struct wireless_dev *iter; 1836 bool nan_started = false; 1837 1838 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { 1839 if (iter->iftype == NL80211_IFTYPE_NAN && 1840 wdev_running(iter)) { 1841 nan_started = true; 1842 break; 1843 } 1844 } 1845 1846 if (!nan_started) 1847 return notifier_from_errno(-ENOLINK); 1848 } 1849 break; 1850 default: 1851 return NOTIFY_DONE; 1852 } 1853 1854 wireless_nlevent_flush(); 1855 1856 return NOTIFY_OK; 1857 } 1858 1859 static struct notifier_block cfg80211_netdev_notifier = { 1860 .notifier_call = cfg80211_netdev_notifier_call, 1861 }; 1862 1863 static void __net_exit cfg80211_pernet_exit(struct net *net) 1864 { 1865 struct cfg80211_registered_device *rdev; 1866 1867 rtnl_lock(); 1868 for_each_rdev(rdev) { 1869 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1870 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1871 } 1872 rtnl_unlock(); 1873 } 1874 1875 static struct pernet_operations cfg80211_pernet_ops = { 1876 .exit = cfg80211_pernet_exit, 1877 }; 1878 1879 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1880 { 1881 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1882 unsigned long flags; 1883 1884 trace_wiphy_work_queue(wiphy, work); 1885 1886 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1887 if (list_empty(&work->entry)) 1888 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1889 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1890 1891 queue_work(system_dfl_wq, &rdev->wiphy_work); 1892 } 1893 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1894 1895 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1896 { 1897 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1898 unsigned long flags; 1899 1900 lockdep_assert_held(&wiphy->mtx); 1901 1902 trace_wiphy_work_cancel(wiphy, work); 1903 1904 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1905 if (!list_empty(&work->entry)) 1906 list_del_init(&work->entry); 1907 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1908 } 1909 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 1910 1911 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 1912 { 1913 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1914 unsigned long flags; 1915 bool run; 1916 1917 trace_wiphy_work_flush(wiphy, work); 1918 1919 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1920 run = !work || !list_empty(&work->entry); 1921 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1922 1923 if (run) 1924 cfg80211_process_wiphy_works(rdev, work); 1925 } 1926 EXPORT_SYMBOL_GPL(wiphy_work_flush); 1927 1928 void wiphy_delayed_work_timer(struct timer_list *t) 1929 { 1930 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 1931 1932 wiphy_work_queue(dwork->wiphy, &dwork->work); 1933 } 1934 EXPORT_SYMBOL(wiphy_delayed_work_timer); 1935 1936 void wiphy_delayed_work_queue(struct wiphy *wiphy, 1937 struct wiphy_delayed_work *dwork, 1938 unsigned long delay) 1939 { 1940 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 1941 1942 if (!delay) { 1943 timer_delete(&dwork->timer); 1944 wiphy_work_queue(wiphy, &dwork->work); 1945 return; 1946 } 1947 1948 dwork->wiphy = wiphy; 1949 mod_timer(&dwork->timer, jiffies + delay); 1950 } 1951 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 1952 1953 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 1954 struct wiphy_delayed_work *dwork) 1955 { 1956 lockdep_assert_held(&wiphy->mtx); 1957 1958 timer_delete_sync(&dwork->timer); 1959 wiphy_work_cancel(wiphy, &dwork->work); 1960 } 1961 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 1962 1963 void wiphy_delayed_work_flush(struct wiphy *wiphy, 1964 struct wiphy_delayed_work *dwork) 1965 { 1966 lockdep_assert_held(&wiphy->mtx); 1967 1968 timer_delete_sync(&dwork->timer); 1969 wiphy_work_flush(wiphy, &dwork->work); 1970 } 1971 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 1972 1973 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 1974 struct wiphy_delayed_work *dwork) 1975 { 1976 return timer_pending(&dwork->timer); 1977 } 1978 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 1979 1980 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 1981 { 1982 struct wiphy_hrtimer_work *hrwork = 1983 container_of(t, struct wiphy_hrtimer_work, timer); 1984 1985 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 1986 1987 return HRTIMER_NORESTART; 1988 } 1989 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 1990 1991 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 1992 struct wiphy_hrtimer_work *hrwork, 1993 ktime_t delay) 1994 { 1995 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 1996 1997 if (!delay) { 1998 hrtimer_cancel(&hrwork->timer); 1999 wiphy_work_queue(wiphy, &hrwork->work); 2000 return; 2001 } 2002 2003 hrwork->wiphy = wiphy; 2004 hrtimer_start_range_ns(&hrwork->timer, delay, 2005 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 2006 } 2007 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 2008 2009 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 2010 struct wiphy_hrtimer_work *hrwork) 2011 { 2012 lockdep_assert_held(&wiphy->mtx); 2013 2014 hrtimer_cancel(&hrwork->timer); 2015 wiphy_work_cancel(wiphy, &hrwork->work); 2016 } 2017 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 2018 2019 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 2020 struct wiphy_hrtimer_work *hrwork) 2021 { 2022 lockdep_assert_held(&wiphy->mtx); 2023 2024 hrtimer_cancel(&hrwork->timer); 2025 wiphy_work_flush(wiphy, &hrwork->work); 2026 } 2027 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 2028 2029 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 2030 struct wiphy_hrtimer_work *hrwork) 2031 { 2032 return hrtimer_is_queued(&hrwork->timer); 2033 } 2034 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 2035 2036 static int __init cfg80211_init(void) 2037 { 2038 int err; 2039 2040 err = register_pernet_device(&cfg80211_pernet_ops); 2041 if (err) 2042 goto out_fail_pernet; 2043 2044 err = wiphy_sysfs_init(); 2045 if (err) 2046 goto out_fail_sysfs; 2047 2048 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 2049 if (err) 2050 goto out_fail_notifier; 2051 2052 err = nl80211_init(); 2053 if (err) 2054 goto out_fail_nl80211; 2055 2056 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 2057 2058 err = regulatory_init(); 2059 if (err) 2060 goto out_fail_reg; 2061 2062 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 2063 if (!cfg80211_wq) { 2064 err = -ENOMEM; 2065 goto out_fail_wq; 2066 } 2067 2068 return 0; 2069 2070 out_fail_wq: 2071 regulatory_exit(); 2072 out_fail_reg: 2073 debugfs_remove(ieee80211_debugfs_dir); 2074 nl80211_exit(); 2075 out_fail_nl80211: 2076 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2077 out_fail_notifier: 2078 wiphy_sysfs_exit(); 2079 out_fail_sysfs: 2080 unregister_pernet_device(&cfg80211_pernet_ops); 2081 out_fail_pernet: 2082 return err; 2083 } 2084 fs_initcall(cfg80211_init); 2085 2086 static void __exit cfg80211_exit(void) 2087 { 2088 debugfs_remove(ieee80211_debugfs_dir); 2089 nl80211_exit(); 2090 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2091 wiphy_sysfs_exit(); 2092 regulatory_exit(); 2093 unregister_pernet_device(&cfg80211_pernet_ops); 2094 destroy_workqueue(cfg80211_wq); 2095 } 2096 module_exit(cfg80211_exit); 2097