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