1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This is the linux wireless configuration interface. 4 * 5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright 2015-2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2026 Intel Corporation 9 */ 10 11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 12 13 #include <linux/if.h> 14 #include <linux/module.h> 15 #include <linux/err.h> 16 #include <linux/list.h> 17 #include <linux/slab.h> 18 #include <linux/nl80211.h> 19 #include <linux/debugfs.h> 20 #include <linux/notifier.h> 21 #include <linux/device.h> 22 #include <linux/etherdevice.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/sched.h> 25 #include <net/genetlink.h> 26 #include <net/cfg80211.h> 27 #include "nl80211.h" 28 #include "core.h" 29 #include "sysfs.h" 30 #include "debugfs.h" 31 #include "wext-compat.h" 32 #include "rdev-ops.h" 33 34 /* name for sysfs, %d is appended */ 35 #define PHY_NAME "phy" 36 37 /* maximum length of radio debugfs directory name */ 38 #define RADIO_DEBUGFSDIR_MAX_LEN 8 39 40 MODULE_AUTHOR("Johannes Berg"); 41 MODULE_LICENSE("GPL"); 42 MODULE_DESCRIPTION("wireless configuration support"); 43 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 44 45 /* RCU-protected (and RTNL for writers) */ 46 LIST_HEAD(cfg80211_rdev_list); 47 int cfg80211_rdev_list_generation; 48 49 /* for debugfs */ 50 static struct dentry *ieee80211_debugfs_dir; 51 52 /* for the cleanup, scan and event works */ 53 struct workqueue_struct *cfg80211_wq; 54 55 static bool cfg80211_disable_40mhz_24ghz; 56 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 57 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 58 "Disable 40MHz support in the 2.4GHz band"); 59 60 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 61 { 62 struct cfg80211_registered_device *result = NULL, *rdev; 63 64 ASSERT_RTNL(); 65 66 for_each_rdev(rdev) { 67 if (rdev->wiphy_idx == wiphy_idx) { 68 result = rdev; 69 break; 70 } 71 } 72 73 return result; 74 } 75 76 int get_wiphy_idx(struct wiphy *wiphy) 77 { 78 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 79 80 return rdev->wiphy_idx; 81 } 82 83 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 84 { 85 struct cfg80211_registered_device *rdev; 86 87 ASSERT_RTNL(); 88 89 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 90 if (!rdev) 91 return NULL; 92 return &rdev->wiphy; 93 } 94 95 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 96 const char *newname) 97 { 98 struct cfg80211_registered_device *rdev2; 99 int wiphy_idx, taken = -1, digits; 100 101 ASSERT_RTNL(); 102 103 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) 104 return -EINVAL; 105 106 /* prohibit calling the thing phy%d when %d is not its number */ 107 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 108 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 109 /* count number of places needed to print wiphy_idx */ 110 digits = 1; 111 while (wiphy_idx /= 10) 112 digits++; 113 /* 114 * deny the name if it is phy<idx> where <idx> is printed 115 * without leading zeroes. taken == strlen(newname) here 116 */ 117 if (taken == strlen(PHY_NAME) + digits) 118 return -EINVAL; 119 } 120 121 /* Ensure another device does not already have this name. */ 122 for_each_rdev(rdev2) 123 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 124 return -EINVAL; 125 126 return 0; 127 } 128 129 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 130 char *newname) 131 { 132 int result; 133 134 ASSERT_RTNL(); 135 lockdep_assert_wiphy(&rdev->wiphy); 136 137 /* Ignore nop renames */ 138 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 139 return 0; 140 141 result = cfg80211_dev_check_name(rdev, newname); 142 if (result < 0) 143 return result; 144 145 result = device_rename(&rdev->wiphy.dev, newname); 146 if (result) 147 return result; 148 149 debugfs_change_name(rdev->wiphy.debugfsdir, "%s", newname); 150 151 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 152 153 return 0; 154 } 155 156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 157 struct net *net) 158 { 159 struct wireless_dev *wdev; 160 int err = 0; 161 162 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 163 return -EOPNOTSUPP; 164 165 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 166 if (!wdev->netdev) 167 continue; 168 wdev->netdev->netns_immutable = false; 169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 170 if (err) 171 break; 172 wdev->netdev->netns_immutable = true; 173 } 174 175 if (err) { 176 /* failed -- clean up to old netns */ 177 net = wiphy_net(&rdev->wiphy); 178 179 list_for_each_entry_continue_reverse(wdev, 180 &rdev->wiphy.wdev_list, 181 list) { 182 if (!wdev->netdev) 183 continue; 184 wdev->netdev->netns_immutable = false; 185 err = dev_change_net_namespace(wdev->netdev, net, 186 "wlan%d"); 187 WARN_ON(err); 188 wdev->netdev->netns_immutable = true; 189 } 190 191 return err; 192 } 193 194 guard(wiphy)(&rdev->wiphy); 195 196 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 197 if (!wdev->netdev) 198 continue; 199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 200 } 201 202 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 203 204 wiphy_net_set(&rdev->wiphy, net); 205 206 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 207 WARN_ON(err); 208 209 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 210 211 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 212 if (!wdev->netdev) 213 continue; 214 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 215 } 216 217 return 0; 218 } 219 220 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 221 { 222 struct cfg80211_registered_device *rdev = data; 223 224 guard(wiphy)(&rdev->wiphy); 225 226 rdev_rfkill_poll(rdev); 227 } 228 229 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 230 struct wireless_dev *wdev) 231 { 232 lockdep_assert_held(&rdev->wiphy.mtx); 233 234 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 235 return; 236 237 if (!wdev_running(wdev)) 238 return; 239 240 rdev_stop_p2p_device(rdev, wdev); 241 wdev->is_running = false; 242 243 rdev->opencount--; 244 245 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 246 if (WARN_ON(!rdev->scan_req->notified && 247 (!rdev->int_scan_req || 248 !rdev->int_scan_req->notified))) 249 rdev->scan_req->info.aborted = true; 250 ___cfg80211_scan_done(rdev, false); 251 } 252 } 253 254 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 255 struct wireless_dev *wdev) 256 { 257 struct cfg80211_nan_local_sched empty_sched = {}; 258 259 lockdep_assert_held(&rdev->wiphy.mtx); 260 261 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 262 return; 263 264 if (!wdev_running(wdev)) 265 return; 266 267 /* 268 * If there is a scheduled update pending, mark it as canceled, so the 269 * empty schedule will be accepted 270 */ 271 wdev->u.nan.sched_update_pending = false; 272 273 /* Unschedule all */ 274 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched); 275 276 rdev_stop_nan(rdev, wdev); 277 wdev->is_running = false; 278 279 eth_zero_addr(wdev->u.nan.cluster_id); 280 281 rdev->opencount--; 282 } 283 284 int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev, 285 struct wireless_dev *wdev, 286 struct cfg80211_nan_local_sched *sched) 287 { 288 int ret; 289 290 lockdep_assert_held(&rdev->wiphy.mtx); 291 292 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) 293 return -EINVAL; 294 295 if (wdev->u.nan.sched_update_pending) 296 return -EBUSY; 297 298 ret = rdev_nan_set_local_sched(rdev, wdev, sched); 299 if (ret) 300 return ret; 301 302 wdev->u.nan.sched_update_pending = sched->deferred; 303 304 kfree(wdev->u.nan.chandefs); 305 wdev->u.nan.chandefs = NULL; 306 wdev->u.nan.n_channels = 0; 307 308 if (!sched->n_channels) 309 return 0; 310 311 wdev->u.nan.chandefs = kcalloc(sched->n_channels, 312 sizeof(*wdev->u.nan.chandefs), 313 GFP_KERNEL); 314 if (!wdev->u.nan.chandefs) 315 return -ENOMEM; 316 317 for (int i = 0; i < sched->n_channels; i++) 318 wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef; 319 320 wdev->u.nan.n_channels = sched->n_channels; 321 322 return 0; 323 } 324 325 void cfg80211_stop_pd(struct cfg80211_registered_device *rdev, 326 struct wireless_dev *wdev) 327 { 328 lockdep_assert_held(&rdev->wiphy.mtx); 329 330 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD)) 331 return; 332 333 if (!rdev->ops->stop_pd) 334 return; 335 336 if (!wdev_running(wdev)) 337 return; 338 339 cfg80211_pmsr_wdev_down(wdev); 340 341 rdev_stop_pd(rdev, wdev); 342 wdev->is_running = false; 343 344 rdev->opencount--; 345 } 346 347 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 348 { 349 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 350 struct wireless_dev *wdev; 351 352 ASSERT_RTNL(); 353 354 /* 355 * Some netdev interfaces need to be closed before some non-netdev 356 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN 357 * interface 358 */ 359 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 360 if (wdev->netdev) { 361 dev_close(wdev->netdev); 362 continue; 363 } 364 } 365 366 guard(wiphy)(wiphy); 367 368 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 369 switch (wdev->iftype) { 370 case NL80211_IFTYPE_P2P_DEVICE: 371 cfg80211_stop_p2p_device(rdev, wdev); 372 break; 373 case NL80211_IFTYPE_NAN: 374 cfg80211_stop_nan(rdev, wdev); 375 break; 376 case NL80211_IFTYPE_PD: 377 cfg80211_stop_pd(rdev, wdev); 378 break; 379 default: 380 break; 381 } 382 } 383 } 384 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 385 386 static int cfg80211_rfkill_set_block(void *data, bool blocked) 387 { 388 struct cfg80211_registered_device *rdev = data; 389 390 if (!blocked) 391 return 0; 392 393 rtnl_lock(); 394 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 395 rtnl_unlock(); 396 397 return 0; 398 } 399 400 static void cfg80211_rfkill_block_work(struct work_struct *work) 401 { 402 struct cfg80211_registered_device *rdev; 403 404 rdev = container_of(work, struct cfg80211_registered_device, 405 rfkill_block); 406 cfg80211_rfkill_set_block(rdev, true); 407 } 408 409 static void cfg80211_event_work(struct work_struct *work) 410 { 411 struct cfg80211_registered_device *rdev; 412 413 rdev = container_of(work, struct cfg80211_registered_device, 414 event_work); 415 416 guard(wiphy)(&rdev->wiphy); 417 418 cfg80211_process_rdev_events(rdev); 419 } 420 421 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 422 { 423 struct wireless_dev *wdev, *tmp; 424 425 ASSERT_RTNL(); 426 427 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 428 if (wdev->nl_owner_dead) { 429 cfg80211_close_dependents(rdev, wdev); 430 431 if (wdev->netdev) 432 dev_close(wdev->netdev); 433 434 guard(wiphy)(&rdev->wiphy); 435 436 cfg80211_remove_virtual_intf(rdev, wdev); 437 } 438 } 439 } 440 441 void cfg80211_close_dependents(struct cfg80211_registered_device *rdev, 442 struct wireless_dev *wdev) 443 { 444 ASSERT_RTNL(); 445 446 if (wdev->iftype != NL80211_IFTYPE_NAN) 447 return; 448 449 /* Close all NAN DATA interfaces */ 450 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 451 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) 452 dev_close(wdev->netdev); 453 } 454 } 455 456 static void cfg80211_destroy_iface_wk(struct work_struct *work) 457 { 458 struct cfg80211_registered_device *rdev; 459 460 rdev = container_of(work, struct cfg80211_registered_device, 461 destroy_work); 462 463 rtnl_lock(); 464 cfg80211_destroy_ifaces(rdev); 465 rtnl_unlock(); 466 } 467 468 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, 469 struct wiphy_work *work) 470 { 471 struct cfg80211_registered_device *rdev; 472 struct cfg80211_sched_scan_request *req, *tmp; 473 474 rdev = container_of(work, struct cfg80211_registered_device, 475 sched_scan_stop_wk); 476 477 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 478 if (req->nl_owner_dead) 479 cfg80211_stop_sched_scan_req(rdev, req, false); 480 } 481 } 482 483 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 484 { 485 struct cfg80211_registered_device *rdev; 486 487 rdev = container_of(work, struct cfg80211_registered_device, 488 propagate_radar_detect_wk); 489 490 rtnl_lock(); 491 492 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 493 NL80211_DFS_UNAVAILABLE, 494 NL80211_RADAR_DETECTED); 495 496 rtnl_unlock(); 497 } 498 499 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 500 { 501 struct cfg80211_registered_device *rdev; 502 503 rdev = container_of(work, struct cfg80211_registered_device, 504 propagate_cac_done_wk); 505 506 rtnl_lock(); 507 508 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 509 NL80211_DFS_AVAILABLE, 510 NL80211_RADAR_CAC_FINISHED); 511 512 rtnl_unlock(); 513 } 514 515 static void cfg80211_wiphy_work(struct work_struct *work) 516 { 517 struct cfg80211_registered_device *rdev; 518 struct wiphy_work *wk; 519 520 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); 521 522 trace_wiphy_work_worker_start(&rdev->wiphy); 523 524 guard(wiphy)(&rdev->wiphy); 525 if (rdev->suspended) 526 return; 527 528 spin_lock_irq(&rdev->wiphy_work_lock); 529 wk = list_first_entry_or_null(&rdev->wiphy_work_list, 530 struct wiphy_work, entry); 531 if (wk) { 532 list_del_init(&wk->entry); 533 if (!list_empty(&rdev->wiphy_work_list)) 534 queue_work(system_dfl_wq, work); 535 spin_unlock_irq(&rdev->wiphy_work_lock); 536 537 trace_wiphy_work_run(&rdev->wiphy, wk); 538 wk->func(&rdev->wiphy, wk); 539 } else { 540 spin_unlock_irq(&rdev->wiphy_work_lock); 541 } 542 } 543 544 /* exported functions */ 545 546 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 547 const char *requested_name) 548 { 549 static atomic_t wiphy_counter = ATOMIC_INIT(0); 550 551 struct cfg80211_registered_device *rdev; 552 int alloc_size; 553 554 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 555 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 556 WARN_ON(ops->connect && !ops->disconnect); 557 WARN_ON(ops->join_ibss && !ops->leave_ibss); 558 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 559 WARN_ON(ops->add_station && !ops->del_station); 560 WARN_ON(ops->add_mpath && !ops->del_mpath); 561 WARN_ON(ops->join_mesh && !ops->leave_mesh); 562 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 563 WARN_ON(ops->start_ap && !ops->stop_ap); 564 WARN_ON(ops->join_ocb && !ops->leave_ocb); 565 WARN_ON(ops->suspend && !ops->resume); 566 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 567 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 568 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 569 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 570 571 alloc_size = sizeof(*rdev) + sizeof_priv; 572 573 rdev = kzalloc(alloc_size, GFP_KERNEL); 574 if (!rdev) 575 return NULL; 576 577 rdev->ops = ops; 578 579 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 580 581 if (unlikely(rdev->wiphy_idx < 0)) { 582 /* ugh, wrapped! */ 583 atomic_dec(&wiphy_counter); 584 kfree(rdev); 585 return NULL; 586 } 587 588 /* atomic_inc_return makes it start at 1, make it start at 0 */ 589 rdev->wiphy_idx--; 590 591 /* give it a proper name */ 592 if (requested_name && requested_name[0]) { 593 int rv; 594 595 rtnl_lock(); 596 rv = cfg80211_dev_check_name(rdev, requested_name); 597 598 if (rv < 0) { 599 rtnl_unlock(); 600 goto use_default_name; 601 } 602 603 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 604 rtnl_unlock(); 605 if (rv) 606 goto use_default_name; 607 } else { 608 int rv; 609 610 use_default_name: 611 /* NOTE: This is *probably* safe w/out holding rtnl because of 612 * the restrictions on phy names. Probably this call could 613 * fail if some other part of the kernel (re)named a device 614 * phyX. But, might should add some locking and check return 615 * value, and use a different name if this one exists? 616 */ 617 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 618 if (rv < 0) { 619 kfree(rdev); 620 return NULL; 621 } 622 } 623 624 mutex_init(&rdev->wiphy.mtx); 625 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 626 INIT_LIST_HEAD(&rdev->beacon_registrations); 627 spin_lock_init(&rdev->beacon_registrations_lock); 628 spin_lock_init(&rdev->bss_lock); 629 INIT_LIST_HEAD(&rdev->bss_list); 630 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 631 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done); 632 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 633 cfg80211_dfs_channels_update_work); 634 #ifdef CONFIG_CFG80211_WEXT 635 rdev->wiphy.wext = &cfg80211_wext_handler; 636 #endif 637 638 device_initialize(&rdev->wiphy.dev); 639 rdev->wiphy.dev.class = &ieee80211_class; 640 rdev->wiphy.dev.platform_data = rdev; 641 device_enable_async_suspend(&rdev->wiphy.dev); 642 643 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 644 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 645 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 646 INIT_WORK(&rdev->propagate_radar_detect_wk, 647 cfg80211_propagate_radar_detect_wk); 648 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 649 INIT_WORK(&rdev->mgmt_registrations_update_wk, 650 cfg80211_mgmt_registrations_update_wk); 651 spin_lock_init(&rdev->mgmt_registrations_lock); 652 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); 653 INIT_LIST_HEAD(&rdev->wiphy_work_list); 654 spin_lock_init(&rdev->wiphy_work_lock); 655 656 #ifdef CONFIG_CFG80211_DEFAULT_PS 657 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 658 #endif 659 660 wiphy_net_set(&rdev->wiphy, &init_net); 661 662 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 663 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 664 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 665 &rdev->rfkill_ops, rdev); 666 667 if (!rdev->wiphy.rfkill) { 668 wiphy_free(&rdev->wiphy); 669 return NULL; 670 } 671 672 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 673 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 674 INIT_WORK(&rdev->event_work, cfg80211_event_work); 675 INIT_WORK(&rdev->background_cac_abort_wk, 676 cfg80211_background_cac_abort_wk); 677 INIT_DELAYED_WORK(&rdev->background_cac_done_wk, 678 cfg80211_background_cac_done_wk); 679 680 init_waitqueue_head(&rdev->dev_wait); 681 682 /* 683 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 684 * Fragmentation and RTS threshold are disabled by default with the 685 * special -1 value. 686 */ 687 rdev->wiphy.retry_short = 7; 688 rdev->wiphy.retry_long = 4; 689 rdev->wiphy.frag_threshold = (u32) -1; 690 rdev->wiphy.rts_threshold = (u32) -1; 691 rdev->wiphy.coverage_class = 0; 692 693 rdev->wiphy.max_num_csa_counters = 1; 694 695 rdev->wiphy.max_sched_scan_plans = 1; 696 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 697 698 return &rdev->wiphy; 699 } 700 EXPORT_SYMBOL(wiphy_new_nm); 701 702 static 703 int wiphy_verify_iface_combinations(struct wiphy *wiphy, 704 const struct ieee80211_iface_combination *iface_comb, 705 int n_iface_comb, 706 bool combined_radio) 707 { 708 const struct ieee80211_iface_combination *c; 709 int i, j; 710 711 for (i = 0; i < n_iface_comb; i++) { 712 u32 cnt = 0; 713 u16 all_iftypes = 0; 714 715 c = &iface_comb[i]; 716 717 /* 718 * Combinations with just one interface aren't real, 719 * however we make an exception for DFS. 720 */ 721 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 722 return -EINVAL; 723 724 /* Need at least one channel */ 725 if (WARN_ON(!c->num_different_channels)) 726 return -EINVAL; 727 728 /* DFS only works on one channel. Avoid this check 729 * for multi-radio global combination, since it hold 730 * the capabilities of all radio combinations. 731 */ 732 if (!combined_radio && 733 WARN_ON(c->radar_detect_widths && 734 c->num_different_channels > 1)) 735 return -EINVAL; 736 737 if (WARN_ON(!c->n_limits)) 738 return -EINVAL; 739 740 for (j = 0; j < c->n_limits; j++) { 741 u16 types = c->limits[j].types; 742 743 /* interface types shouldn't overlap */ 744 if (WARN_ON(types & all_iftypes)) 745 return -EINVAL; 746 all_iftypes |= types; 747 748 if (WARN_ON(!c->limits[j].max)) 749 return -EINVAL; 750 751 /* Shouldn't list software iftypes in combinations! */ 752 if (WARN_ON(wiphy->software_iftypes & types)) 753 return -EINVAL; 754 755 /* Only a single P2P_DEVICE can be allowed, avoid this 756 * check for multi-radio global combination, since it 757 * hold the capabilities of all radio combinations. 758 */ 759 if (!combined_radio && 760 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 761 c->limits[j].max > 1)) 762 return -EINVAL; 763 764 /* Only a single NAN can be allowed */ 765 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 766 c->limits[j].max > 1)) 767 return -EINVAL; 768 769 /* 770 * This isn't well-defined right now. If you have an 771 * IBSS interface, then its beacon interval may change 772 * by joining other networks, and nothing prevents it 773 * from doing that. 774 * So technically we probably shouldn't even allow AP 775 * and IBSS in the same interface, but it seems that 776 * some drivers support that, possibly only with fixed 777 * beacon intervals for IBSS. 778 */ 779 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 780 c->beacon_int_min_gcd)) { 781 return -EINVAL; 782 } 783 784 cnt += c->limits[j].max; 785 /* 786 * Don't advertise an unsupported type 787 * in a combination. 788 */ 789 if (WARN_ON((wiphy->interface_modes & types) != types)) 790 return -EINVAL; 791 } 792 793 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 794 return -EINVAL; 795 796 /* You can't even choose that many! */ 797 if (WARN_ON(cnt < c->max_interfaces)) 798 return -EINVAL; 799 } 800 801 return 0; 802 } 803 804 static int wiphy_verify_combinations(struct wiphy *wiphy) 805 { 806 int i, ret; 807 bool combined_radio = false; 808 809 if (wiphy->n_radio) { 810 for (i = 0; i < wiphy->n_radio; i++) { 811 const struct wiphy_radio *radio = &wiphy->radio[i]; 812 813 ret = wiphy_verify_iface_combinations(wiphy, 814 radio->iface_combinations, 815 radio->n_iface_combinations, 816 false); 817 if (ret) 818 return ret; 819 } 820 821 combined_radio = true; 822 } 823 824 ret = wiphy_verify_iface_combinations(wiphy, 825 wiphy->iface_combinations, 826 wiphy->n_iface_combinations, 827 combined_radio); 828 829 return ret; 830 } 831 832 static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy) 833 { 834 int i, j; 835 836 if (wiphy->n_cipher_suites && !wiphy->cipher_suites) 837 return false; 838 839 for (i = 0; i < wiphy->n_cipher_suites; i++) { 840 for (j = 0; j < i; j++) { 841 if (wiphy->cipher_suites[i] == 842 wiphy->cipher_suites[j]) 843 return false; 844 } 845 } 846 847 return true; 848 } 849 850 int wiphy_register(struct wiphy *wiphy) 851 { 852 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 853 int res; 854 enum nl80211_band band; 855 struct ieee80211_supported_band *sband; 856 bool have_band = false; 857 int i; 858 u16 ifmodes = wiphy->interface_modes; 859 860 #ifdef CONFIG_PM 861 if (WARN_ON(wiphy->wowlan && 862 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 863 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 864 return -EINVAL; 865 if (WARN_ON(wiphy->wowlan && 866 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 867 !wiphy->wowlan->tcp)) 868 return -EINVAL; 869 #endif 870 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 871 (!rdev->ops->tdls_channel_switch || 872 !rdev->ops->tdls_cancel_channel_switch))) 873 return -EINVAL; 874 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) && 875 (!rdev->ops->start_pd || !rdev->ops->stop_pd))) 876 return -EINVAL; 877 878 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 879 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 880 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 881 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 882 return -EINVAL; 883 884 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) && 885 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1))) 886 return -EINVAL; 887 888 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 889 return -EINVAL; 890 891 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 892 return -EINVAL; 893 894 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 895 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 896 !wiphy->pmsr_capa->ftm.non_asap)) 897 return -EINVAL; 898 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 899 !wiphy->pmsr_capa->ftm.bandwidths)) 900 return -EINVAL; 901 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 902 ~(BIT(NL80211_PREAMBLE_LEGACY) | 903 BIT(NL80211_PREAMBLE_HT) | 904 BIT(NL80211_PREAMBLE_VHT) | 905 BIT(NL80211_PREAMBLE_HE) | 906 BIT(NL80211_PREAMBLE_DMG)))) 907 return -EINVAL; 908 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 909 wiphy->pmsr_capa->ftm.non_trigger_based) && 910 !(wiphy->pmsr_capa->ftm.preambles & 911 BIT(NL80211_PREAMBLE_HE)))) 912 return -EINVAL; 913 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 914 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 915 BIT(NL80211_CHAN_WIDTH_20) | 916 BIT(NL80211_CHAN_WIDTH_40) | 917 BIT(NL80211_CHAN_WIDTH_80) | 918 BIT(NL80211_CHAN_WIDTH_80P80) | 919 BIT(NL80211_CHAN_WIDTH_160) | 920 BIT(NL80211_CHAN_WIDTH_320) | 921 BIT(NL80211_CHAN_WIDTH_5) | 922 BIT(NL80211_CHAN_WIDTH_10)))) 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->rfkill_block); 1341 cancel_work_sync(&rdev->conn_work); 1342 flush_work(&rdev->event_work); 1343 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1344 cancel_delayed_work_sync(&rdev->background_cac_done_wk); 1345 flush_work(&rdev->destroy_work); 1346 flush_work(&rdev->propagate_radar_detect_wk); 1347 flush_work(&rdev->propagate_cac_done_wk); 1348 flush_work(&rdev->mgmt_registrations_update_wk); 1349 flush_work(&rdev->background_cac_abort_wk); 1350 1351 cfg80211_rdev_free_wowlan(rdev); 1352 cfg80211_free_coalesce(rdev->coalesce); 1353 rdev->coalesce = NULL; 1354 } 1355 EXPORT_SYMBOL(wiphy_unregister); 1356 1357 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1358 { 1359 struct cfg80211_internal_bss *scan, *tmp; 1360 struct cfg80211_beacon_registration *reg, *treg; 1361 unsigned long flags; 1362 1363 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1364 WARN_ON(!list_empty(&rdev->wiphy_work_list)); 1365 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1366 cancel_work_sync(&rdev->wiphy_work); 1367 1368 rfkill_destroy(rdev->wiphy.rfkill); 1369 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1370 list_del(®->list); 1371 kfree(reg); 1372 } 1373 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1374 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1375 mutex_destroy(&rdev->wiphy.mtx); 1376 1377 /* 1378 * The 'regd' can only be non-NULL if we never finished 1379 * initializing the wiphy and thus never went through the 1380 * unregister path - e.g. in failure scenarios. Thus, it 1381 * cannot have been visible to anyone if non-NULL, so we 1382 * can just free it here. 1383 */ 1384 kfree(rcu_dereference_raw(rdev->wiphy.regd)); 1385 1386 kfree(rdev); 1387 } 1388 1389 void wiphy_free(struct wiphy *wiphy) 1390 { 1391 kfree(wiphy->radio_cfg); 1392 put_device(&wiphy->dev); 1393 } 1394 EXPORT_SYMBOL(wiphy_free); 1395 1396 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, 1397 enum rfkill_hard_block_reasons reason) 1398 { 1399 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1400 1401 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason)) 1402 schedule_work(&rdev->rfkill_block); 1403 } 1404 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); 1405 1406 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 1407 bool unregister_netdev) 1408 { 1409 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1410 struct cfg80211_cqm_config *cqm_config; 1411 unsigned int link_id; 1412 1413 ASSERT_RTNL(); 1414 lockdep_assert_held(&rdev->wiphy.mtx); 1415 1416 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1417 1418 wdev->registered = false; 1419 1420 if (wdev->netdev) { 1421 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); 1422 if (unregister_netdev) 1423 unregister_netdevice(wdev->netdev); 1424 } 1425 1426 list_del_rcu(&wdev->list); 1427 synchronize_net(); 1428 rdev->devlist_generation++; 1429 1430 cfg80211_mlme_purge_registrations(wdev); 1431 1432 switch (wdev->iftype) { 1433 case NL80211_IFTYPE_P2P_DEVICE: 1434 cfg80211_stop_p2p_device(rdev, wdev); 1435 break; 1436 case NL80211_IFTYPE_NAN: 1437 cfg80211_stop_nan(rdev, wdev); 1438 break; 1439 case NL80211_IFTYPE_PD: 1440 cfg80211_stop_pd(rdev, wdev); 1441 break; 1442 default: 1443 break; 1444 } 1445 1446 #ifdef CONFIG_CFG80211_WEXT 1447 kfree_sensitive(wdev->wext.keys); 1448 wdev->wext.keys = NULL; 1449 #endif 1450 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work); 1451 /* deleted from the list, so can't be found from nl80211 any more */ 1452 cqm_config = rcu_access_pointer(wdev->cqm_config); 1453 kfree_rcu(cqm_config, rcu_head); 1454 RCU_INIT_POINTER(wdev->cqm_config, NULL); 1455 1456 /* 1457 * Ensure that all events have been processed and 1458 * freed. 1459 */ 1460 cfg80211_process_wdev_events(wdev); 1461 1462 if (wdev->iftype == NL80211_IFTYPE_STATION || 1463 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1464 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { 1465 struct cfg80211_internal_bss *curbss; 1466 1467 curbss = wdev->links[link_id].client.current_bss; 1468 1469 if (WARN_ON(curbss)) { 1470 cfg80211_unhold_bss(curbss); 1471 cfg80211_put_bss(wdev->wiphy, &curbss->pub); 1472 wdev->links[link_id].client.current_bss = NULL; 1473 } 1474 } 1475 } 1476 1477 wdev->connected = false; 1478 } 1479 1480 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1481 { 1482 _cfg80211_unregister_wdev(wdev, true); 1483 } 1484 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1485 1486 static const struct device_type wiphy_type = { 1487 .name = "wlan", 1488 }; 1489 1490 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1491 enum nl80211_iftype iftype, int num) 1492 { 1493 lockdep_assert_held(&rdev->wiphy.mtx); 1494 1495 rdev->num_running_ifaces += num; 1496 if (iftype == NL80211_IFTYPE_MONITOR) 1497 rdev->num_running_monitor_ifaces += num; 1498 } 1499 1500 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev, 1501 struct wireless_dev *wdev, int link_id) 1502 { 1503 struct net_device *dev = wdev->netdev; 1504 struct cfg80211_sched_scan_request *pos, *tmp; 1505 1506 lockdep_assert_held(&rdev->wiphy.mtx); 1507 1508 cfg80211_pmsr_wdev_down(wdev); 1509 1510 cfg80211_stop_radar_detection(wdev); 1511 cfg80211_stop_background_radar_detection(wdev); 1512 1513 switch (wdev->iftype) { 1514 case NL80211_IFTYPE_ADHOC: 1515 cfg80211_leave_ibss(rdev, dev, true); 1516 break; 1517 case NL80211_IFTYPE_P2P_CLIENT: 1518 case NL80211_IFTYPE_STATION: 1519 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1520 list) { 1521 if (dev == pos->dev) 1522 cfg80211_stop_sched_scan_req(rdev, pos, false); 1523 } 1524 1525 #ifdef CONFIG_CFG80211_WEXT 1526 kfree(wdev->wext.ie); 1527 wdev->wext.ie = NULL; 1528 wdev->wext.ie_len = 0; 1529 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1530 #endif 1531 cfg80211_disconnect(rdev, dev, 1532 WLAN_REASON_DEAUTH_LEAVING, true); 1533 break; 1534 case NL80211_IFTYPE_MESH_POINT: 1535 cfg80211_leave_mesh(rdev, dev); 1536 break; 1537 case NL80211_IFTYPE_AP: 1538 case NL80211_IFTYPE_P2P_GO: 1539 cfg80211_stop_ap(rdev, dev, link_id, true); 1540 break; 1541 case NL80211_IFTYPE_OCB: 1542 cfg80211_leave_ocb(rdev, dev); 1543 break; 1544 case NL80211_IFTYPE_P2P_DEVICE: 1545 cfg80211_stop_p2p_device(rdev, wdev); 1546 break; 1547 case NL80211_IFTYPE_NAN: 1548 cfg80211_stop_nan(rdev, wdev); 1549 break; 1550 case NL80211_IFTYPE_PD: 1551 cfg80211_stop_pd(rdev, wdev); 1552 break; 1553 case NL80211_IFTYPE_AP_VLAN: 1554 case NL80211_IFTYPE_MONITOR: 1555 case NL80211_IFTYPE_NAN_DATA: 1556 /* nothing to do */ 1557 break; 1558 case NL80211_IFTYPE_UNSPECIFIED: 1559 case NL80211_IFTYPE_WDS: 1560 case NUM_NL80211_IFTYPES: 1561 /* invalid */ 1562 break; 1563 } 1564 } 1565 1566 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1567 struct wireless_dev *wdev, int link_id) 1568 { 1569 ASSERT_RTNL(); 1570 1571 /* NAN_DATA interfaces must be closed before stopping NAN */ 1572 cfg80211_close_dependents(rdev, wdev); 1573 1574 guard(wiphy)(&rdev->wiphy); 1575 1576 cfg80211_leave_locked(rdev, wdev, link_id); 1577 } 1578 1579 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, 1580 int link_id, gfp_t gfp) 1581 { 1582 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1583 struct cfg80211_event *ev; 1584 unsigned long flags; 1585 1586 /* Only AP/GO interfaces may have a specific link_id */ 1587 if (WARN_ON_ONCE(link_id != -1 && 1588 wdev->iftype != NL80211_IFTYPE_AP && 1589 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1590 link_id = -1; 1591 1592 trace_cfg80211_stop_link(wiphy, wdev, link_id); 1593 1594 if (wdev->iftype == NL80211_IFTYPE_NAN) 1595 return; 1596 1597 ev = kzalloc_obj(*ev, gfp); 1598 if (!ev) 1599 return; 1600 1601 ev->type = EVENT_STOPPED; 1602 ev->link_id = link_id; 1603 1604 spin_lock_irqsave(&wdev->event_lock, flags); 1605 list_add_tail(&ev->list, &wdev->event_list); 1606 spin_unlock_irqrestore(&wdev->event_lock, flags); 1607 queue_work(cfg80211_wq, &rdev->event_work); 1608 } 1609 EXPORT_SYMBOL(cfg80211_stop_link); 1610 1611 void cfg80211_init_wdev(struct wireless_dev *wdev) 1612 { 1613 INIT_LIST_HEAD(&wdev->event_list); 1614 spin_lock_init(&wdev->event_lock); 1615 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1616 INIT_LIST_HEAD(&wdev->pmsr_list); 1617 spin_lock_init(&wdev->pmsr_lock); 1618 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1619 1620 #ifdef CONFIG_CFG80211_WEXT 1621 wdev->wext.default_key = -1; 1622 wdev->wext.default_mgmt_key = -1; 1623 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1624 #endif 1625 1626 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work); 1627 1628 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1629 wdev->ps = true; 1630 else 1631 wdev->ps = false; 1632 /* allow mac80211 to determine the timeout */ 1633 wdev->ps_timeout = -1; 1634 1635 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1; 1636 1637 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1638 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1639 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1640 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; 1641 1642 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1643 } 1644 1645 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 1646 struct wireless_dev *wdev) 1647 { 1648 ASSERT_RTNL(); 1649 lockdep_assert_held(&rdev->wiphy.mtx); 1650 1651 /* 1652 * We get here also when the interface changes network namespaces, 1653 * as it's registered into the new one, but we don't want it to 1654 * change ID in that case. Checking if the ID is already assigned 1655 * works, because 0 isn't considered a valid ID and the memory is 1656 * 0-initialized. 1657 */ 1658 if (!wdev->identifier) 1659 wdev->identifier = ++rdev->wdev_id; 1660 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1661 rdev->devlist_generation++; 1662 wdev->registered = true; 1663 1664 if (wdev->netdev && 1665 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj, 1666 "phy80211")) 1667 pr_err("failed to add phy80211 symlink to netdev!\n"); 1668 1669 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1670 } 1671 1672 int cfg80211_register_netdevice(struct net_device *dev) 1673 { 1674 struct wireless_dev *wdev = dev->ieee80211_ptr; 1675 struct cfg80211_registered_device *rdev; 1676 int ret; 1677 1678 ASSERT_RTNL(); 1679 1680 if (WARN_ON(!wdev)) 1681 return -EINVAL; 1682 1683 rdev = wiphy_to_rdev(wdev->wiphy); 1684 1685 lockdep_assert_held(&rdev->wiphy.mtx); 1686 1687 /* we'll take care of this */ 1688 wdev->registered = true; 1689 wdev->registering = true; 1690 ret = register_netdevice(dev); 1691 if (ret) 1692 goto out; 1693 1694 cfg80211_register_wdev(rdev, wdev); 1695 ret = 0; 1696 out: 1697 wdev->registering = false; 1698 if (ret) 1699 wdev->registered = false; 1700 return ret; 1701 } 1702 EXPORT_SYMBOL(cfg80211_register_netdevice); 1703 1704 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1705 unsigned long state, void *ptr) 1706 { 1707 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1708 struct wireless_dev *wdev = dev->ieee80211_ptr; 1709 struct cfg80211_registered_device *rdev; 1710 struct cfg80211_sched_scan_request *pos, *tmp; 1711 1712 if (!wdev) 1713 return NOTIFY_DONE; 1714 1715 rdev = wiphy_to_rdev(wdev->wiphy); 1716 1717 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1718 1719 switch (state) { 1720 case NETDEV_POST_INIT: 1721 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1722 wdev->netdev = dev; 1723 /* can only change netns with wiphy */ 1724 dev->netns_immutable = true; 1725 1726 cfg80211_init_wdev(wdev); 1727 break; 1728 case NETDEV_REGISTER: 1729 if (!wdev->registered) { 1730 guard(wiphy)(&rdev->wiphy); 1731 1732 cfg80211_register_wdev(rdev, wdev); 1733 } 1734 break; 1735 case NETDEV_UNREGISTER: 1736 /* 1737 * It is possible to get NETDEV_UNREGISTER multiple times, 1738 * so check wdev->registered. 1739 */ 1740 if (wdev->registered && !wdev->registering) { 1741 guard(wiphy)(&rdev->wiphy); 1742 1743 _cfg80211_unregister_wdev(wdev, false); 1744 } 1745 break; 1746 case NETDEV_GOING_DOWN: 1747 cfg80211_leave(rdev, wdev, -1); 1748 scoped_guard(wiphy, &rdev->wiphy) 1749 cfg80211_remove_links(wdev); 1750 /* since we just did cfg80211_leave() nothing to do there */ 1751 cancel_work_sync(&wdev->disconnect_wk); 1752 cancel_work_sync(&wdev->pmsr_free_wk); 1753 break; 1754 case NETDEV_DOWN: 1755 wiphy_lock(&rdev->wiphy); 1756 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1757 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) { 1758 if (WARN_ON(!rdev->scan_req->notified && 1759 (!rdev->int_scan_req || 1760 !rdev->int_scan_req->notified))) 1761 rdev->scan_req->info.aborted = true; 1762 ___cfg80211_scan_done(rdev, false); 1763 } 1764 1765 list_for_each_entry_safe(pos, tmp, 1766 &rdev->sched_scan_req_list, list) { 1767 if (WARN_ON(pos->dev == wdev->netdev)) 1768 cfg80211_stop_sched_scan_req(rdev, pos, false); 1769 } 1770 1771 rdev->opencount--; 1772 wiphy_unlock(&rdev->wiphy); 1773 wake_up(&rdev->dev_wait); 1774 break; 1775 case NETDEV_UP: 1776 wiphy_lock(&rdev->wiphy); 1777 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1778 switch (wdev->iftype) { 1779 #ifdef CONFIG_CFG80211_WEXT 1780 case NL80211_IFTYPE_ADHOC: 1781 cfg80211_ibss_wext_join(rdev, wdev); 1782 break; 1783 case NL80211_IFTYPE_STATION: 1784 cfg80211_mgd_wext_connect(rdev, wdev); 1785 break; 1786 #endif 1787 #ifdef CONFIG_MAC80211_MESH 1788 case NL80211_IFTYPE_MESH_POINT: 1789 { 1790 /* backward compat code... */ 1791 struct mesh_setup setup; 1792 memcpy(&setup, &default_mesh_setup, 1793 sizeof(setup)); 1794 /* back compat only needed for mesh_id */ 1795 setup.mesh_id = wdev->u.mesh.id; 1796 setup.mesh_id_len = wdev->u.mesh.id_up_len; 1797 if (wdev->u.mesh.id_up_len) 1798 __cfg80211_join_mesh(rdev, dev, 1799 &setup, 1800 &default_mesh_config); 1801 break; 1802 } 1803 #endif 1804 default: 1805 break; 1806 } 1807 rdev->opencount++; 1808 1809 /* 1810 * Configure power management to the driver here so that its 1811 * correctly set also after interface type changes etc. 1812 */ 1813 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1814 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1815 rdev->ops->set_power_mgmt && 1816 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1817 wdev->ps_timeout)) { 1818 /* assume this means it's off */ 1819 wdev->ps = false; 1820 } 1821 wiphy_unlock(&rdev->wiphy); 1822 break; 1823 case NETDEV_PRE_UP: 1824 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1825 wdev->use_4addr, 0)) 1826 return notifier_from_errno(-EOPNOTSUPP); 1827 1828 if (rfkill_blocked(rdev->wiphy.rfkill)) 1829 return notifier_from_errno(-ERFKILL); 1830 1831 /* NAN_DATA interfaces require a running NAN interface */ 1832 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { 1833 struct wireless_dev *iter; 1834 bool nan_started = false; 1835 1836 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { 1837 if (iter->iftype == NL80211_IFTYPE_NAN && 1838 wdev_running(iter)) { 1839 nan_started = true; 1840 break; 1841 } 1842 } 1843 1844 if (!nan_started) 1845 return notifier_from_errno(-ENOLINK); 1846 } 1847 break; 1848 default: 1849 return NOTIFY_DONE; 1850 } 1851 1852 wireless_nlevent_flush(); 1853 1854 return NOTIFY_OK; 1855 } 1856 1857 static struct notifier_block cfg80211_netdev_notifier = { 1858 .notifier_call = cfg80211_netdev_notifier_call, 1859 }; 1860 1861 static void __net_exit cfg80211_pernet_exit(struct net *net) 1862 { 1863 struct cfg80211_registered_device *rdev; 1864 1865 rtnl_lock(); 1866 for_each_rdev(rdev) { 1867 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1868 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1869 } 1870 rtnl_unlock(); 1871 } 1872 1873 static struct pernet_operations cfg80211_pernet_ops = { 1874 .exit = cfg80211_pernet_exit, 1875 }; 1876 1877 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) 1878 { 1879 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1880 unsigned long flags; 1881 1882 trace_wiphy_work_queue(wiphy, work); 1883 1884 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1885 if (list_empty(&work->entry)) 1886 list_add_tail(&work->entry, &rdev->wiphy_work_list); 1887 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1888 1889 queue_work(system_dfl_wq, &rdev->wiphy_work); 1890 } 1891 EXPORT_SYMBOL_GPL(wiphy_work_queue); 1892 1893 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) 1894 { 1895 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1896 unsigned long flags; 1897 1898 lockdep_assert_held(&wiphy->mtx); 1899 1900 trace_wiphy_work_cancel(wiphy, work); 1901 1902 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1903 if (!list_empty(&work->entry)) 1904 list_del_init(&work->entry); 1905 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1906 } 1907 EXPORT_SYMBOL_GPL(wiphy_work_cancel); 1908 1909 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) 1910 { 1911 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1912 unsigned long flags; 1913 bool run; 1914 1915 trace_wiphy_work_flush(wiphy, work); 1916 1917 spin_lock_irqsave(&rdev->wiphy_work_lock, flags); 1918 run = !work || !list_empty(&work->entry); 1919 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); 1920 1921 if (run) 1922 cfg80211_process_wiphy_works(rdev, work); 1923 } 1924 EXPORT_SYMBOL_GPL(wiphy_work_flush); 1925 1926 void wiphy_delayed_work_timer(struct timer_list *t) 1927 { 1928 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer); 1929 1930 wiphy_work_queue(dwork->wiphy, &dwork->work); 1931 } 1932 EXPORT_SYMBOL(wiphy_delayed_work_timer); 1933 1934 void wiphy_delayed_work_queue(struct wiphy *wiphy, 1935 struct wiphy_delayed_work *dwork, 1936 unsigned long delay) 1937 { 1938 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay); 1939 1940 if (!delay) { 1941 timer_delete(&dwork->timer); 1942 wiphy_work_queue(wiphy, &dwork->work); 1943 return; 1944 } 1945 1946 dwork->wiphy = wiphy; 1947 mod_timer(&dwork->timer, jiffies + delay); 1948 } 1949 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); 1950 1951 void wiphy_delayed_work_cancel(struct wiphy *wiphy, 1952 struct wiphy_delayed_work *dwork) 1953 { 1954 lockdep_assert_held(&wiphy->mtx); 1955 1956 timer_delete_sync(&dwork->timer); 1957 wiphy_work_cancel(wiphy, &dwork->work); 1958 } 1959 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); 1960 1961 void wiphy_delayed_work_flush(struct wiphy *wiphy, 1962 struct wiphy_delayed_work *dwork) 1963 { 1964 lockdep_assert_held(&wiphy->mtx); 1965 1966 timer_delete_sync(&dwork->timer); 1967 wiphy_work_flush(wiphy, &dwork->work); 1968 } 1969 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); 1970 1971 bool wiphy_delayed_work_pending(struct wiphy *wiphy, 1972 struct wiphy_delayed_work *dwork) 1973 { 1974 return timer_pending(&dwork->timer); 1975 } 1976 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending); 1977 1978 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t) 1979 { 1980 struct wiphy_hrtimer_work *hrwork = 1981 container_of(t, struct wiphy_hrtimer_work, timer); 1982 1983 wiphy_work_queue(hrwork->wiphy, &hrwork->work); 1984 1985 return HRTIMER_NORESTART; 1986 } 1987 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer); 1988 1989 void wiphy_hrtimer_work_queue(struct wiphy *wiphy, 1990 struct wiphy_hrtimer_work *hrwork, 1991 ktime_t delay) 1992 { 1993 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay); 1994 1995 if (!delay) { 1996 hrtimer_cancel(&hrwork->timer); 1997 wiphy_work_queue(wiphy, &hrwork->work); 1998 return; 1999 } 2000 2001 hrwork->wiphy = wiphy; 2002 hrtimer_start_range_ns(&hrwork->timer, delay, 2003 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL); 2004 } 2005 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue); 2006 2007 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, 2008 struct wiphy_hrtimer_work *hrwork) 2009 { 2010 lockdep_assert_held(&wiphy->mtx); 2011 2012 hrtimer_cancel(&hrwork->timer); 2013 wiphy_work_cancel(wiphy, &hrwork->work); 2014 } 2015 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel); 2016 2017 void wiphy_hrtimer_work_flush(struct wiphy *wiphy, 2018 struct wiphy_hrtimer_work *hrwork) 2019 { 2020 lockdep_assert_held(&wiphy->mtx); 2021 2022 hrtimer_cancel(&hrwork->timer); 2023 wiphy_work_flush(wiphy, &hrwork->work); 2024 } 2025 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush); 2026 2027 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, 2028 struct wiphy_hrtimer_work *hrwork) 2029 { 2030 return hrtimer_is_queued(&hrwork->timer); 2031 } 2032 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending); 2033 2034 static int __init cfg80211_init(void) 2035 { 2036 int err; 2037 2038 err = register_pernet_device(&cfg80211_pernet_ops); 2039 if (err) 2040 goto out_fail_pernet; 2041 2042 err = wiphy_sysfs_init(); 2043 if (err) 2044 goto out_fail_sysfs; 2045 2046 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 2047 if (err) 2048 goto out_fail_notifier; 2049 2050 err = nl80211_init(); 2051 if (err) 2052 goto out_fail_nl80211; 2053 2054 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 2055 2056 err = regulatory_init(); 2057 if (err) 2058 goto out_fail_reg; 2059 2060 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 2061 if (!cfg80211_wq) { 2062 err = -ENOMEM; 2063 goto out_fail_wq; 2064 } 2065 2066 return 0; 2067 2068 out_fail_wq: 2069 regulatory_exit(); 2070 out_fail_reg: 2071 debugfs_remove(ieee80211_debugfs_dir); 2072 nl80211_exit(); 2073 out_fail_nl80211: 2074 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2075 out_fail_notifier: 2076 wiphy_sysfs_exit(); 2077 out_fail_sysfs: 2078 unregister_pernet_device(&cfg80211_pernet_ops); 2079 out_fail_pernet: 2080 return err; 2081 } 2082 fs_initcall(cfg80211_init); 2083 2084 static void __exit cfg80211_exit(void) 2085 { 2086 debugfs_remove(ieee80211_debugfs_dir); 2087 nl80211_exit(); 2088 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 2089 wiphy_sysfs_exit(); 2090 regulatory_exit(); 2091 unregister_pernet_device(&cfg80211_pernet_ops); 2092 destroy_workqueue(cfg80211_wq); 2093 } 2094 module_exit(cfg80211_exit); 2095