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 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 MODULE_AUTHOR("Johannes Berg"); 38 MODULE_LICENSE("GPL"); 39 MODULE_DESCRIPTION("wireless configuration support"); 40 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); 41 42 /* RCU-protected (and RTNL for writers) */ 43 LIST_HEAD(cfg80211_rdev_list); 44 int cfg80211_rdev_list_generation; 45 46 /* for debugfs */ 47 static struct dentry *ieee80211_debugfs_dir; 48 49 /* for the cleanup, scan and event works */ 50 struct workqueue_struct *cfg80211_wq; 51 52 static bool cfg80211_disable_40mhz_24ghz; 53 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); 54 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, 55 "Disable 40MHz support in the 2.4GHz band"); 56 57 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 58 { 59 struct cfg80211_registered_device *result = NULL, *rdev; 60 61 ASSERT_RTNL(); 62 63 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 64 if (rdev->wiphy_idx == wiphy_idx) { 65 result = rdev; 66 break; 67 } 68 } 69 70 return result; 71 } 72 73 int get_wiphy_idx(struct wiphy *wiphy) 74 { 75 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 76 77 return rdev->wiphy_idx; 78 } 79 80 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 81 { 82 struct cfg80211_registered_device *rdev; 83 84 ASSERT_RTNL(); 85 86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 87 if (!rdev) 88 return NULL; 89 return &rdev->wiphy; 90 } 91 92 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, 93 const char *newname) 94 { 95 struct cfg80211_registered_device *rdev2; 96 int wiphy_idx, taken = -1, digits; 97 98 ASSERT_RTNL(); 99 100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) 101 return -EINVAL; 102 103 /* prohibit calling the thing phy%d when %d is not its number */ 104 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 105 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 106 /* count number of places needed to print wiphy_idx */ 107 digits = 1; 108 while (wiphy_idx /= 10) 109 digits++; 110 /* 111 * deny the name if it is phy<idx> where <idx> is printed 112 * without leading zeroes. taken == strlen(newname) here 113 */ 114 if (taken == strlen(PHY_NAME) + digits) 115 return -EINVAL; 116 } 117 118 /* Ensure another device does not already have this name. */ 119 list_for_each_entry(rdev2, &cfg80211_rdev_list, list) 120 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) 121 return -EINVAL; 122 123 return 0; 124 } 125 126 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 127 char *newname) 128 { 129 int result; 130 131 ASSERT_RTNL(); 132 133 /* Ignore nop renames */ 134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) 135 return 0; 136 137 result = cfg80211_dev_check_name(rdev, newname); 138 if (result < 0) 139 return result; 140 141 result = device_rename(&rdev->wiphy.dev, newname); 142 if (result) 143 return result; 144 145 if (rdev->wiphy.debugfsdir && 146 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, 147 rdev->wiphy.debugfsdir, 148 rdev->wiphy.debugfsdir->d_parent, 149 newname)) 150 pr_err("failed to rename debugfs dir to %s!\n", newname); 151 152 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 153 154 return 0; 155 } 156 157 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 158 struct net *net) 159 { 160 struct wireless_dev *wdev; 161 int err = 0; 162 163 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 164 return -EOPNOTSUPP; 165 166 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 167 if (!wdev->netdev) 168 continue; 169 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 170 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 171 if (err) 172 break; 173 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 174 } 175 176 if (err) { 177 /* failed -- clean up to old netns */ 178 net = wiphy_net(&rdev->wiphy); 179 180 list_for_each_entry_continue_reverse(wdev, 181 &rdev->wiphy.wdev_list, 182 list) { 183 if (!wdev->netdev) 184 continue; 185 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 186 err = dev_change_net_namespace(wdev->netdev, net, 187 "wlan%d"); 188 WARN_ON(err); 189 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 190 } 191 192 return err; 193 } 194 195 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 196 if (!wdev->netdev) 197 continue; 198 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 199 } 200 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 201 202 wiphy_net_set(&rdev->wiphy, net); 203 204 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 205 WARN_ON(err); 206 207 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 208 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 209 if (!wdev->netdev) 210 continue; 211 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 212 } 213 214 return 0; 215 } 216 217 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 218 { 219 struct cfg80211_registered_device *rdev = data; 220 221 rdev_rfkill_poll(rdev); 222 } 223 224 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 225 struct wireless_dev *wdev) 226 { 227 ASSERT_RTNL(); 228 229 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 230 return; 231 232 if (!wdev_running(wdev)) 233 return; 234 235 rdev_stop_p2p_device(rdev, wdev); 236 wdev->is_running = false; 237 238 rdev->opencount--; 239 240 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 241 if (WARN_ON(!rdev->scan_req->notified)) 242 rdev->scan_req->info.aborted = true; 243 ___cfg80211_scan_done(rdev, false); 244 } 245 } 246 247 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 248 struct wireless_dev *wdev) 249 { 250 ASSERT_RTNL(); 251 252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 253 return; 254 255 if (!wdev_running(wdev)) 256 return; 257 258 rdev_stop_nan(rdev, wdev); 259 wdev->is_running = false; 260 261 rdev->opencount--; 262 } 263 264 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 265 { 266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 267 struct wireless_dev *wdev; 268 269 ASSERT_RTNL(); 270 271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 272 if (wdev->netdev) { 273 dev_close(wdev->netdev); 274 continue; 275 } 276 /* otherwise, check iftype */ 277 switch (wdev->iftype) { 278 case NL80211_IFTYPE_P2P_DEVICE: 279 cfg80211_stop_p2p_device(rdev, wdev); 280 break; 281 case NL80211_IFTYPE_NAN: 282 cfg80211_stop_nan(rdev, wdev); 283 break; 284 default: 285 break; 286 } 287 } 288 } 289 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 290 291 static int cfg80211_rfkill_set_block(void *data, bool blocked) 292 { 293 struct cfg80211_registered_device *rdev = data; 294 295 if (!blocked) 296 return 0; 297 298 rtnl_lock(); 299 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 300 rtnl_unlock(); 301 302 return 0; 303 } 304 305 static void cfg80211_rfkill_sync_work(struct work_struct *work) 306 { 307 struct cfg80211_registered_device *rdev; 308 309 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); 310 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); 311 } 312 313 static void cfg80211_event_work(struct work_struct *work) 314 { 315 struct cfg80211_registered_device *rdev; 316 317 rdev = container_of(work, struct cfg80211_registered_device, 318 event_work); 319 320 rtnl_lock(); 321 cfg80211_process_rdev_events(rdev); 322 rtnl_unlock(); 323 } 324 325 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 326 { 327 struct wireless_dev *wdev, *tmp; 328 329 ASSERT_RTNL(); 330 331 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 332 if (wdev->nl_owner_dead) 333 rdev_del_virtual_intf(rdev, wdev); 334 } 335 } 336 337 static void cfg80211_destroy_iface_wk(struct work_struct *work) 338 { 339 struct cfg80211_registered_device *rdev; 340 341 rdev = container_of(work, struct cfg80211_registered_device, 342 destroy_work); 343 344 rtnl_lock(); 345 cfg80211_destroy_ifaces(rdev); 346 rtnl_unlock(); 347 } 348 349 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 350 { 351 struct cfg80211_registered_device *rdev; 352 struct cfg80211_sched_scan_request *req, *tmp; 353 354 rdev = container_of(work, struct cfg80211_registered_device, 355 sched_scan_stop_wk); 356 357 rtnl_lock(); 358 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 359 if (req->nl_owner_dead) 360 cfg80211_stop_sched_scan_req(rdev, req, false); 361 } 362 rtnl_unlock(); 363 } 364 365 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 366 { 367 struct cfg80211_registered_device *rdev; 368 369 rdev = container_of(work, struct cfg80211_registered_device, 370 propagate_radar_detect_wk); 371 372 rtnl_lock(); 373 374 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 375 NL80211_DFS_UNAVAILABLE, 376 NL80211_RADAR_DETECTED); 377 378 rtnl_unlock(); 379 } 380 381 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 382 { 383 struct cfg80211_registered_device *rdev; 384 385 rdev = container_of(work, struct cfg80211_registered_device, 386 propagate_cac_done_wk); 387 388 rtnl_lock(); 389 390 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 391 NL80211_DFS_AVAILABLE, 392 NL80211_RADAR_CAC_FINISHED); 393 394 rtnl_unlock(); 395 } 396 397 /* exported functions */ 398 399 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 400 const char *requested_name) 401 { 402 static atomic_t wiphy_counter = ATOMIC_INIT(0); 403 404 struct cfg80211_registered_device *rdev; 405 int alloc_size; 406 407 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 408 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 409 WARN_ON(ops->connect && !ops->disconnect); 410 WARN_ON(ops->join_ibss && !ops->leave_ibss); 411 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 412 WARN_ON(ops->add_station && !ops->del_station); 413 WARN_ON(ops->add_mpath && !ops->del_mpath); 414 WARN_ON(ops->join_mesh && !ops->leave_mesh); 415 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 416 WARN_ON(ops->start_ap && !ops->stop_ap); 417 WARN_ON(ops->join_ocb && !ops->leave_ocb); 418 WARN_ON(ops->suspend && !ops->resume); 419 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 420 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 421 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 422 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 423 424 alloc_size = sizeof(*rdev) + sizeof_priv; 425 426 rdev = kzalloc(alloc_size, GFP_KERNEL); 427 if (!rdev) 428 return NULL; 429 430 rdev->ops = ops; 431 432 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 433 434 if (unlikely(rdev->wiphy_idx < 0)) { 435 /* ugh, wrapped! */ 436 atomic_dec(&wiphy_counter); 437 kfree(rdev); 438 return NULL; 439 } 440 441 /* atomic_inc_return makes it start at 1, make it start at 0 */ 442 rdev->wiphy_idx--; 443 444 /* give it a proper name */ 445 if (requested_name && requested_name[0]) { 446 int rv; 447 448 rtnl_lock(); 449 rv = cfg80211_dev_check_name(rdev, requested_name); 450 451 if (rv < 0) { 452 rtnl_unlock(); 453 goto use_default_name; 454 } 455 456 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 457 rtnl_unlock(); 458 if (rv) 459 goto use_default_name; 460 } else { 461 int rv; 462 463 use_default_name: 464 /* NOTE: This is *probably* safe w/out holding rtnl because of 465 * the restrictions on phy names. Probably this call could 466 * fail if some other part of the kernel (re)named a device 467 * phyX. But, might should add some locking and check return 468 * value, and use a different name if this one exists? 469 */ 470 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 471 if (rv < 0) { 472 kfree(rdev); 473 return NULL; 474 } 475 } 476 477 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 478 INIT_LIST_HEAD(&rdev->beacon_registrations); 479 spin_lock_init(&rdev->beacon_registrations_lock); 480 spin_lock_init(&rdev->bss_lock); 481 INIT_LIST_HEAD(&rdev->bss_list); 482 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 483 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 484 INIT_LIST_HEAD(&rdev->mlme_unreg); 485 spin_lock_init(&rdev->mlme_unreg_lock); 486 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 487 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 488 cfg80211_dfs_channels_update_work); 489 #ifdef CONFIG_CFG80211_WEXT 490 rdev->wiphy.wext = &cfg80211_wext_handler; 491 #endif 492 493 device_initialize(&rdev->wiphy.dev); 494 rdev->wiphy.dev.class = &ieee80211_class; 495 rdev->wiphy.dev.platform_data = rdev; 496 device_enable_async_suspend(&rdev->wiphy.dev); 497 498 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 499 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 500 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 501 INIT_WORK(&rdev->propagate_radar_detect_wk, 502 cfg80211_propagate_radar_detect_wk); 503 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 504 505 #ifdef CONFIG_CFG80211_DEFAULT_PS 506 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 507 #endif 508 509 wiphy_net_set(&rdev->wiphy, &init_net); 510 511 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 512 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 513 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 514 &rdev->rfkill_ops, rdev); 515 516 if (!rdev->rfkill) { 517 kfree(rdev); 518 return NULL; 519 } 520 521 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 522 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 523 INIT_WORK(&rdev->event_work, cfg80211_event_work); 524 525 init_waitqueue_head(&rdev->dev_wait); 526 527 /* 528 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 529 * Fragmentation and RTS threshold are disabled by default with the 530 * special -1 value. 531 */ 532 rdev->wiphy.retry_short = 7; 533 rdev->wiphy.retry_long = 4; 534 rdev->wiphy.frag_threshold = (u32) -1; 535 rdev->wiphy.rts_threshold = (u32) -1; 536 rdev->wiphy.coverage_class = 0; 537 538 rdev->wiphy.max_num_csa_counters = 1; 539 540 rdev->wiphy.max_sched_scan_plans = 1; 541 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 542 543 return &rdev->wiphy; 544 } 545 EXPORT_SYMBOL(wiphy_new_nm); 546 547 static int wiphy_verify_combinations(struct wiphy *wiphy) 548 { 549 const struct ieee80211_iface_combination *c; 550 int i, j; 551 552 for (i = 0; i < wiphy->n_iface_combinations; i++) { 553 u32 cnt = 0; 554 u16 all_iftypes = 0; 555 556 c = &wiphy->iface_combinations[i]; 557 558 /* 559 * Combinations with just one interface aren't real, 560 * however we make an exception for DFS. 561 */ 562 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 563 return -EINVAL; 564 565 /* Need at least one channel */ 566 if (WARN_ON(!c->num_different_channels)) 567 return -EINVAL; 568 569 /* 570 * Put a sane limit on maximum number of different 571 * channels to simplify channel accounting code. 572 */ 573 if (WARN_ON(c->num_different_channels > 574 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 575 return -EINVAL; 576 577 /* DFS only works on one channel. */ 578 if (WARN_ON(c->radar_detect_widths && 579 (c->num_different_channels > 1))) 580 return -EINVAL; 581 582 if (WARN_ON(!c->n_limits)) 583 return -EINVAL; 584 585 for (j = 0; j < c->n_limits; j++) { 586 u16 types = c->limits[j].types; 587 588 /* interface types shouldn't overlap */ 589 if (WARN_ON(types & all_iftypes)) 590 return -EINVAL; 591 all_iftypes |= types; 592 593 if (WARN_ON(!c->limits[j].max)) 594 return -EINVAL; 595 596 /* Shouldn't list software iftypes in combinations! */ 597 if (WARN_ON(wiphy->software_iftypes & types)) 598 return -EINVAL; 599 600 /* Only a single P2P_DEVICE can be allowed */ 601 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 602 c->limits[j].max > 1)) 603 return -EINVAL; 604 605 /* Only a single NAN can be allowed */ 606 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 607 c->limits[j].max > 1)) 608 return -EINVAL; 609 610 /* 611 * This isn't well-defined right now. If you have an 612 * IBSS interface, then its beacon interval may change 613 * by joining other networks, and nothing prevents it 614 * from doing that. 615 * So technically we probably shouldn't even allow AP 616 * and IBSS in the same interface, but it seems that 617 * some drivers support that, possibly only with fixed 618 * beacon intervals for IBSS. 619 */ 620 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 621 c->beacon_int_min_gcd)) { 622 return -EINVAL; 623 } 624 625 cnt += c->limits[j].max; 626 /* 627 * Don't advertise an unsupported type 628 * in a combination. 629 */ 630 if (WARN_ON((wiphy->interface_modes & types) != types)) 631 return -EINVAL; 632 } 633 634 #ifndef CONFIG_WIRELESS_WDS 635 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 636 return -EINVAL; 637 #endif 638 639 /* You can't even choose that many! */ 640 if (WARN_ON(cnt < c->max_interfaces)) 641 return -EINVAL; 642 } 643 644 return 0; 645 } 646 647 int wiphy_register(struct wiphy *wiphy) 648 { 649 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 650 int res; 651 enum nl80211_band band; 652 struct ieee80211_supported_band *sband; 653 bool have_band = false; 654 int i; 655 u16 ifmodes = wiphy->interface_modes; 656 657 #ifdef CONFIG_PM 658 if (WARN_ON(wiphy->wowlan && 659 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 660 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 661 return -EINVAL; 662 if (WARN_ON(wiphy->wowlan && 663 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 664 !wiphy->wowlan->tcp)) 665 return -EINVAL; 666 #endif 667 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 668 (!rdev->ops->tdls_channel_switch || 669 !rdev->ops->tdls_cancel_channel_switch))) 670 return -EINVAL; 671 672 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 673 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 674 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 675 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 676 return -EINVAL; 677 678 #ifndef CONFIG_WIRELESS_WDS 679 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 680 return -EINVAL; 681 #endif 682 683 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 684 return -EINVAL; 685 686 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 687 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 688 !wiphy->pmsr_capa->ftm.non_asap)) 689 return -EINVAL; 690 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 691 !wiphy->pmsr_capa->ftm.bandwidths)) 692 return -EINVAL; 693 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 694 ~(BIT(NL80211_PREAMBLE_LEGACY) | 695 BIT(NL80211_PREAMBLE_HT) | 696 BIT(NL80211_PREAMBLE_VHT) | 697 BIT(NL80211_PREAMBLE_DMG)))) 698 return -EINVAL; 699 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 700 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 701 BIT(NL80211_CHAN_WIDTH_20) | 702 BIT(NL80211_CHAN_WIDTH_40) | 703 BIT(NL80211_CHAN_WIDTH_80) | 704 BIT(NL80211_CHAN_WIDTH_80P80) | 705 BIT(NL80211_CHAN_WIDTH_160) | 706 BIT(NL80211_CHAN_WIDTH_5) | 707 BIT(NL80211_CHAN_WIDTH_10)))) 708 return -EINVAL; 709 } 710 711 /* 712 * if a wiphy has unsupported modes for regulatory channel enforcement, 713 * opt-out of enforcement checking 714 */ 715 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 716 BIT(NL80211_IFTYPE_P2P_CLIENT) | 717 BIT(NL80211_IFTYPE_AP) | 718 BIT(NL80211_IFTYPE_P2P_GO) | 719 BIT(NL80211_IFTYPE_ADHOC) | 720 BIT(NL80211_IFTYPE_P2P_DEVICE) | 721 BIT(NL80211_IFTYPE_NAN) | 722 BIT(NL80211_IFTYPE_AP_VLAN) | 723 BIT(NL80211_IFTYPE_MONITOR))) 724 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 725 726 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 727 (wiphy->regulatory_flags & 728 (REGULATORY_CUSTOM_REG | 729 REGULATORY_STRICT_REG | 730 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 731 REGULATORY_COUNTRY_IE_IGNORE)))) 732 return -EINVAL; 733 734 if (WARN_ON(wiphy->coalesce && 735 (!wiphy->coalesce->n_rules || 736 !wiphy->coalesce->n_patterns) && 737 (!wiphy->coalesce->pattern_min_len || 738 wiphy->coalesce->pattern_min_len > 739 wiphy->coalesce->pattern_max_len))) 740 return -EINVAL; 741 742 if (WARN_ON(wiphy->ap_sme_capa && 743 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 744 return -EINVAL; 745 746 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 747 return -EINVAL; 748 749 if (WARN_ON(wiphy->addresses && 750 !is_zero_ether_addr(wiphy->perm_addr) && 751 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 752 ETH_ALEN))) 753 return -EINVAL; 754 755 if (WARN_ON(wiphy->max_acl_mac_addrs && 756 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 757 !rdev->ops->set_mac_acl))) 758 return -EINVAL; 759 760 /* assure only valid behaviours are flagged by driver 761 * hence subtract 2 as bit 0 is invalid. 762 */ 763 if (WARN_ON(wiphy->bss_select_support && 764 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 765 return -EINVAL; 766 767 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 768 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 769 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 770 return -EINVAL; 771 772 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 773 rdev->ops->update_connect_params)) 774 return -EINVAL; 775 776 if (wiphy->addresses) 777 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 778 779 /* sanity check ifmodes */ 780 WARN_ON(!ifmodes); 781 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 782 if (WARN_ON(ifmodes != wiphy->interface_modes)) 783 wiphy->interface_modes = ifmodes; 784 785 res = wiphy_verify_combinations(wiphy); 786 if (res) 787 return res; 788 789 /* sanity check supported bands/channels */ 790 for (band = 0; band < NUM_NL80211_BANDS; band++) { 791 u16 types = 0; 792 793 sband = wiphy->bands[band]; 794 if (!sband) 795 continue; 796 797 sband->band = band; 798 if (WARN_ON(!sband->n_channels)) 799 return -EINVAL; 800 /* 801 * on 60GHz band, there are no legacy rates, so 802 * n_bitrates is 0 803 */ 804 if (WARN_ON(band != NL80211_BAND_60GHZ && 805 !sband->n_bitrates)) 806 return -EINVAL; 807 808 /* 809 * Since cfg80211_disable_40mhz_24ghz is global, we can 810 * modify the sband's ht data even if the driver uses a 811 * global structure for that. 812 */ 813 if (cfg80211_disable_40mhz_24ghz && 814 band == NL80211_BAND_2GHZ && 815 sband->ht_cap.ht_supported) { 816 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 817 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 818 } 819 820 /* 821 * Since we use a u32 for rate bitmaps in 822 * ieee80211_get_response_rate, we cannot 823 * have more than 32 legacy rates. 824 */ 825 if (WARN_ON(sband->n_bitrates > 32)) 826 return -EINVAL; 827 828 for (i = 0; i < sband->n_channels; i++) { 829 sband->channels[i].orig_flags = 830 sband->channels[i].flags; 831 sband->channels[i].orig_mag = INT_MAX; 832 sband->channels[i].orig_mpwr = 833 sband->channels[i].max_power; 834 sband->channels[i].band = band; 835 } 836 837 for (i = 0; i < sband->n_iftype_data; i++) { 838 const struct ieee80211_sband_iftype_data *iftd; 839 840 iftd = &sband->iftype_data[i]; 841 842 if (WARN_ON(!iftd->types_mask)) 843 return -EINVAL; 844 if (WARN_ON(types & iftd->types_mask)) 845 return -EINVAL; 846 847 /* at least one piece of information must be present */ 848 if (WARN_ON(!iftd->he_cap.has_he)) 849 return -EINVAL; 850 851 types |= iftd->types_mask; 852 } 853 854 have_band = true; 855 } 856 857 if (!have_band) { 858 WARN_ON(1); 859 return -EINVAL; 860 } 861 862 #ifdef CONFIG_PM 863 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 864 (!rdev->wiphy.wowlan->pattern_min_len || 865 rdev->wiphy.wowlan->pattern_min_len > 866 rdev->wiphy.wowlan->pattern_max_len))) 867 return -EINVAL; 868 #endif 869 870 /* check and set up bitrates */ 871 ieee80211_set_bitrate_flags(wiphy); 872 873 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 874 875 rtnl_lock(); 876 res = device_add(&rdev->wiphy.dev); 877 if (res) { 878 rtnl_unlock(); 879 return res; 880 } 881 882 /* set up regulatory info */ 883 wiphy_regulatory_register(wiphy); 884 885 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 886 cfg80211_rdev_list_generation++; 887 888 /* add to debugfs */ 889 rdev->wiphy.debugfsdir = 890 debugfs_create_dir(wiphy_name(&rdev->wiphy), 891 ieee80211_debugfs_dir); 892 if (IS_ERR(rdev->wiphy.debugfsdir)) 893 rdev->wiphy.debugfsdir = NULL; 894 895 cfg80211_debugfs_rdev_add(rdev); 896 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 897 898 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 899 struct regulatory_request request; 900 901 request.wiphy_idx = get_wiphy_idx(wiphy); 902 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 903 request.alpha2[0] = '9'; 904 request.alpha2[1] = '9'; 905 906 nl80211_send_reg_change_event(&request); 907 } 908 909 /* Check that nobody globally advertises any capabilities they do not 910 * advertise on all possible interface types. 911 */ 912 if (wiphy->extended_capabilities_len && 913 wiphy->num_iftype_ext_capab && 914 wiphy->iftype_ext_capab) { 915 u8 supported_on_all, j; 916 const struct wiphy_iftype_ext_capab *capab; 917 918 capab = wiphy->iftype_ext_capab; 919 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 920 if (capab[0].extended_capabilities_len > j) 921 supported_on_all = 922 capab[0].extended_capabilities[j]; 923 else 924 supported_on_all = 0x00; 925 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 926 if (j >= capab[i].extended_capabilities_len) { 927 supported_on_all = 0x00; 928 break; 929 } 930 supported_on_all &= 931 capab[i].extended_capabilities[j]; 932 } 933 if (WARN_ON(wiphy->extended_capabilities[j] & 934 ~supported_on_all)) 935 break; 936 } 937 } 938 939 rdev->wiphy.registered = true; 940 rtnl_unlock(); 941 942 res = rfkill_register(rdev->rfkill); 943 if (res) { 944 rfkill_destroy(rdev->rfkill); 945 rdev->rfkill = NULL; 946 wiphy_unregister(&rdev->wiphy); 947 return res; 948 } 949 950 return 0; 951 } 952 EXPORT_SYMBOL(wiphy_register); 953 954 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 955 { 956 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 957 958 if (!rdev->ops->rfkill_poll) 959 return; 960 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 961 rfkill_resume_polling(rdev->rfkill); 962 } 963 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 964 965 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 966 { 967 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 968 969 rfkill_pause_polling(rdev->rfkill); 970 } 971 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 972 973 void wiphy_unregister(struct wiphy *wiphy) 974 { 975 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 976 977 wait_event(rdev->dev_wait, ({ 978 int __count; 979 rtnl_lock(); 980 __count = rdev->opencount; 981 rtnl_unlock(); 982 __count == 0; })); 983 984 if (rdev->rfkill) 985 rfkill_unregister(rdev->rfkill); 986 987 rtnl_lock(); 988 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 989 rdev->wiphy.registered = false; 990 991 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 992 993 /* 994 * First remove the hardware from everywhere, this makes 995 * it impossible to find from userspace. 996 */ 997 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 998 list_del_rcu(&rdev->list); 999 synchronize_rcu(); 1000 1001 /* 1002 * If this device got a regulatory hint tell core its 1003 * free to listen now to a new shiny device regulatory hint 1004 */ 1005 wiphy_regulatory_deregister(wiphy); 1006 1007 cfg80211_rdev_list_generation++; 1008 device_del(&rdev->wiphy.dev); 1009 1010 rtnl_unlock(); 1011 1012 flush_work(&rdev->scan_done_wk); 1013 cancel_work_sync(&rdev->conn_work); 1014 flush_work(&rdev->event_work); 1015 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1016 flush_work(&rdev->destroy_work); 1017 flush_work(&rdev->sched_scan_stop_wk); 1018 flush_work(&rdev->mlme_unreg_wk); 1019 flush_work(&rdev->propagate_radar_detect_wk); 1020 flush_work(&rdev->propagate_cac_done_wk); 1021 1022 #ifdef CONFIG_PM 1023 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1024 rdev_set_wakeup(rdev, false); 1025 #endif 1026 cfg80211_rdev_free_wowlan(rdev); 1027 cfg80211_rdev_free_coalesce(rdev); 1028 } 1029 EXPORT_SYMBOL(wiphy_unregister); 1030 1031 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1032 { 1033 struct cfg80211_internal_bss *scan, *tmp; 1034 struct cfg80211_beacon_registration *reg, *treg; 1035 rfkill_destroy(rdev->rfkill); 1036 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1037 list_del(®->list); 1038 kfree(reg); 1039 } 1040 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1041 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1042 kfree(rdev); 1043 } 1044 1045 void wiphy_free(struct wiphy *wiphy) 1046 { 1047 put_device(&wiphy->dev); 1048 } 1049 EXPORT_SYMBOL(wiphy_free); 1050 1051 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 1052 { 1053 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1054 1055 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 1056 schedule_work(&rdev->rfkill_sync); 1057 } 1058 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 1059 1060 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 1061 { 1062 kfree(wdev->cqm_config); 1063 wdev->cqm_config = NULL; 1064 } 1065 1066 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync) 1067 { 1068 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1069 1070 ASSERT_RTNL(); 1071 1072 flush_work(&wdev->pmsr_free_wk); 1073 1074 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1075 1076 list_del_rcu(&wdev->list); 1077 if (sync) 1078 synchronize_rcu(); 1079 rdev->devlist_generation++; 1080 1081 cfg80211_mlme_purge_registrations(wdev); 1082 1083 switch (wdev->iftype) { 1084 case NL80211_IFTYPE_P2P_DEVICE: 1085 cfg80211_stop_p2p_device(rdev, wdev); 1086 break; 1087 case NL80211_IFTYPE_NAN: 1088 cfg80211_stop_nan(rdev, wdev); 1089 break; 1090 default: 1091 break; 1092 } 1093 1094 #ifdef CONFIG_CFG80211_WEXT 1095 kzfree(wdev->wext.keys); 1096 #endif 1097 /* only initialized if we have a netdev */ 1098 if (wdev->netdev) 1099 flush_work(&wdev->disconnect_wk); 1100 1101 cfg80211_cqm_config_free(wdev); 1102 } 1103 1104 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1105 { 1106 if (WARN_ON(wdev->netdev)) 1107 return; 1108 1109 __cfg80211_unregister_wdev(wdev, true); 1110 } 1111 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1112 1113 static const struct device_type wiphy_type = { 1114 .name = "wlan", 1115 }; 1116 1117 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1118 enum nl80211_iftype iftype, int num) 1119 { 1120 ASSERT_RTNL(); 1121 1122 rdev->num_running_ifaces += num; 1123 if (iftype == NL80211_IFTYPE_MONITOR) 1124 rdev->num_running_monitor_ifaces += num; 1125 } 1126 1127 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1128 struct wireless_dev *wdev) 1129 { 1130 struct net_device *dev = wdev->netdev; 1131 struct cfg80211_sched_scan_request *pos, *tmp; 1132 1133 ASSERT_RTNL(); 1134 ASSERT_WDEV_LOCK(wdev); 1135 1136 cfg80211_pmsr_wdev_down(wdev); 1137 1138 switch (wdev->iftype) { 1139 case NL80211_IFTYPE_ADHOC: 1140 __cfg80211_leave_ibss(rdev, dev, true); 1141 break; 1142 case NL80211_IFTYPE_P2P_CLIENT: 1143 case NL80211_IFTYPE_STATION: 1144 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1145 list) { 1146 if (dev == pos->dev) 1147 cfg80211_stop_sched_scan_req(rdev, pos, false); 1148 } 1149 1150 #ifdef CONFIG_CFG80211_WEXT 1151 kfree(wdev->wext.ie); 1152 wdev->wext.ie = NULL; 1153 wdev->wext.ie_len = 0; 1154 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1155 #endif 1156 cfg80211_disconnect(rdev, dev, 1157 WLAN_REASON_DEAUTH_LEAVING, true); 1158 break; 1159 case NL80211_IFTYPE_MESH_POINT: 1160 __cfg80211_leave_mesh(rdev, dev); 1161 break; 1162 case NL80211_IFTYPE_AP: 1163 case NL80211_IFTYPE_P2P_GO: 1164 __cfg80211_stop_ap(rdev, dev, true); 1165 break; 1166 case NL80211_IFTYPE_OCB: 1167 __cfg80211_leave_ocb(rdev, dev); 1168 break; 1169 case NL80211_IFTYPE_WDS: 1170 /* must be handled by mac80211/driver, has no APIs */ 1171 break; 1172 case NL80211_IFTYPE_P2P_DEVICE: 1173 case NL80211_IFTYPE_NAN: 1174 /* cannot happen, has no netdev */ 1175 break; 1176 case NL80211_IFTYPE_AP_VLAN: 1177 case NL80211_IFTYPE_MONITOR: 1178 /* nothing to do */ 1179 break; 1180 case NL80211_IFTYPE_UNSPECIFIED: 1181 case NUM_NL80211_IFTYPES: 1182 /* invalid */ 1183 break; 1184 } 1185 } 1186 1187 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1188 struct wireless_dev *wdev) 1189 { 1190 wdev_lock(wdev); 1191 __cfg80211_leave(rdev, wdev); 1192 wdev_unlock(wdev); 1193 } 1194 1195 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1196 gfp_t gfp) 1197 { 1198 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1199 struct cfg80211_event *ev; 1200 unsigned long flags; 1201 1202 trace_cfg80211_stop_iface(wiphy, wdev); 1203 1204 ev = kzalloc(sizeof(*ev), gfp); 1205 if (!ev) 1206 return; 1207 1208 ev->type = EVENT_STOPPED; 1209 1210 spin_lock_irqsave(&wdev->event_lock, flags); 1211 list_add_tail(&ev->list, &wdev->event_list); 1212 spin_unlock_irqrestore(&wdev->event_lock, flags); 1213 queue_work(cfg80211_wq, &rdev->event_work); 1214 } 1215 EXPORT_SYMBOL(cfg80211_stop_iface); 1216 1217 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 1218 struct wireless_dev *wdev) 1219 { 1220 mutex_init(&wdev->mtx); 1221 INIT_LIST_HEAD(&wdev->event_list); 1222 spin_lock_init(&wdev->event_lock); 1223 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1224 spin_lock_init(&wdev->mgmt_registrations_lock); 1225 INIT_LIST_HEAD(&wdev->pmsr_list); 1226 spin_lock_init(&wdev->pmsr_lock); 1227 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1228 1229 /* 1230 * We get here also when the interface changes network namespaces, 1231 * as it's registered into the new one, but we don't want it to 1232 * change ID in that case. Checking if the ID is already assigned 1233 * works, because 0 isn't considered a valid ID and the memory is 1234 * 0-initialized. 1235 */ 1236 if (!wdev->identifier) 1237 wdev->identifier = ++rdev->wdev_id; 1238 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1239 rdev->devlist_generation++; 1240 1241 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1242 } 1243 1244 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1245 unsigned long state, void *ptr) 1246 { 1247 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1248 struct wireless_dev *wdev = dev->ieee80211_ptr; 1249 struct cfg80211_registered_device *rdev; 1250 struct cfg80211_sched_scan_request *pos, *tmp; 1251 1252 if (!wdev) 1253 return NOTIFY_DONE; 1254 1255 rdev = wiphy_to_rdev(wdev->wiphy); 1256 1257 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1258 1259 switch (state) { 1260 case NETDEV_POST_INIT: 1261 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1262 break; 1263 case NETDEV_REGISTER: 1264 /* 1265 * NB: cannot take rdev->mtx here because this may be 1266 * called within code protected by it when interfaces 1267 * are added with nl80211. 1268 */ 1269 /* can only change netns with wiphy */ 1270 dev->features |= NETIF_F_NETNS_LOCAL; 1271 1272 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1273 "phy80211")) { 1274 pr_err("failed to add phy80211 symlink to netdev!\n"); 1275 } 1276 wdev->netdev = dev; 1277 #ifdef CONFIG_CFG80211_WEXT 1278 wdev->wext.default_key = -1; 1279 wdev->wext.default_mgmt_key = -1; 1280 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1281 #endif 1282 1283 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1284 wdev->ps = true; 1285 else 1286 wdev->ps = false; 1287 /* allow mac80211 to determine the timeout */ 1288 wdev->ps_timeout = -1; 1289 1290 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1291 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1292 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1293 dev->priv_flags |= IFF_DONT_BRIDGE; 1294 1295 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1296 1297 cfg80211_init_wdev(rdev, wdev); 1298 break; 1299 case NETDEV_GOING_DOWN: 1300 cfg80211_leave(rdev, wdev); 1301 break; 1302 case NETDEV_DOWN: 1303 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1304 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1305 if (WARN_ON(!rdev->scan_req->notified)) 1306 rdev->scan_req->info.aborted = true; 1307 ___cfg80211_scan_done(rdev, false); 1308 } 1309 1310 list_for_each_entry_safe(pos, tmp, 1311 &rdev->sched_scan_req_list, list) { 1312 if (WARN_ON(pos->dev == wdev->netdev)) 1313 cfg80211_stop_sched_scan_req(rdev, pos, false); 1314 } 1315 1316 rdev->opencount--; 1317 wake_up(&rdev->dev_wait); 1318 break; 1319 case NETDEV_UP: 1320 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1321 wdev_lock(wdev); 1322 switch (wdev->iftype) { 1323 #ifdef CONFIG_CFG80211_WEXT 1324 case NL80211_IFTYPE_ADHOC: 1325 cfg80211_ibss_wext_join(rdev, wdev); 1326 break; 1327 case NL80211_IFTYPE_STATION: 1328 cfg80211_mgd_wext_connect(rdev, wdev); 1329 break; 1330 #endif 1331 #ifdef CONFIG_MAC80211_MESH 1332 case NL80211_IFTYPE_MESH_POINT: 1333 { 1334 /* backward compat code... */ 1335 struct mesh_setup setup; 1336 memcpy(&setup, &default_mesh_setup, 1337 sizeof(setup)); 1338 /* back compat only needed for mesh_id */ 1339 setup.mesh_id = wdev->ssid; 1340 setup.mesh_id_len = wdev->mesh_id_up_len; 1341 if (wdev->mesh_id_up_len) 1342 __cfg80211_join_mesh(rdev, dev, 1343 &setup, 1344 &default_mesh_config); 1345 break; 1346 } 1347 #endif 1348 default: 1349 break; 1350 } 1351 wdev_unlock(wdev); 1352 rdev->opencount++; 1353 1354 /* 1355 * Configure power management to the driver here so that its 1356 * correctly set also after interface type changes etc. 1357 */ 1358 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1359 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1360 rdev->ops->set_power_mgmt && 1361 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1362 wdev->ps_timeout)) { 1363 /* assume this means it's off */ 1364 wdev->ps = false; 1365 } 1366 break; 1367 case NETDEV_UNREGISTER: 1368 /* 1369 * It is possible to get NETDEV_UNREGISTER 1370 * multiple times. To detect that, check 1371 * that the interface is still on the list 1372 * of registered interfaces, and only then 1373 * remove and clean it up. 1374 */ 1375 if (!list_empty(&wdev->list)) { 1376 __cfg80211_unregister_wdev(wdev, false); 1377 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1378 } 1379 /* 1380 * synchronise (so that we won't find this netdev 1381 * from other code any more) and then clear the list 1382 * head so that the above code can safely check for 1383 * !list_empty() to avoid double-cleanup. 1384 */ 1385 synchronize_rcu(); 1386 INIT_LIST_HEAD(&wdev->list); 1387 /* 1388 * Ensure that all events have been processed and 1389 * freed. 1390 */ 1391 cfg80211_process_wdev_events(wdev); 1392 1393 if (WARN_ON(wdev->current_bss)) { 1394 cfg80211_unhold_bss(wdev->current_bss); 1395 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1396 wdev->current_bss = NULL; 1397 } 1398 break; 1399 case NETDEV_PRE_UP: 1400 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 1401 return notifier_from_errno(-EOPNOTSUPP); 1402 if (rfkill_blocked(rdev->rfkill)) 1403 return notifier_from_errno(-ERFKILL); 1404 break; 1405 default: 1406 return NOTIFY_DONE; 1407 } 1408 1409 wireless_nlevent_flush(); 1410 1411 return NOTIFY_OK; 1412 } 1413 1414 static struct notifier_block cfg80211_netdev_notifier = { 1415 .notifier_call = cfg80211_netdev_notifier_call, 1416 }; 1417 1418 static void __net_exit cfg80211_pernet_exit(struct net *net) 1419 { 1420 struct cfg80211_registered_device *rdev; 1421 1422 rtnl_lock(); 1423 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1424 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1425 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1426 } 1427 rtnl_unlock(); 1428 } 1429 1430 static struct pernet_operations cfg80211_pernet_ops = { 1431 .exit = cfg80211_pernet_exit, 1432 }; 1433 1434 static int __init cfg80211_init(void) 1435 { 1436 int err; 1437 1438 err = register_pernet_device(&cfg80211_pernet_ops); 1439 if (err) 1440 goto out_fail_pernet; 1441 1442 err = wiphy_sysfs_init(); 1443 if (err) 1444 goto out_fail_sysfs; 1445 1446 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1447 if (err) 1448 goto out_fail_notifier; 1449 1450 err = nl80211_init(); 1451 if (err) 1452 goto out_fail_nl80211; 1453 1454 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1455 1456 err = regulatory_init(); 1457 if (err) 1458 goto out_fail_reg; 1459 1460 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1461 if (!cfg80211_wq) { 1462 err = -ENOMEM; 1463 goto out_fail_wq; 1464 } 1465 1466 return 0; 1467 1468 out_fail_wq: 1469 regulatory_exit(); 1470 out_fail_reg: 1471 debugfs_remove(ieee80211_debugfs_dir); 1472 nl80211_exit(); 1473 out_fail_nl80211: 1474 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1475 out_fail_notifier: 1476 wiphy_sysfs_exit(); 1477 out_fail_sysfs: 1478 unregister_pernet_device(&cfg80211_pernet_ops); 1479 out_fail_pernet: 1480 return err; 1481 } 1482 fs_initcall(cfg80211_init); 1483 1484 static void __exit cfg80211_exit(void) 1485 { 1486 debugfs_remove(ieee80211_debugfs_dir); 1487 nl80211_exit(); 1488 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1489 wiphy_sysfs_exit(); 1490 regulatory_exit(); 1491 unregister_pernet_device(&cfg80211_pernet_ops); 1492 destroy_workqueue(cfg80211_wq); 1493 } 1494 module_exit(cfg80211_exit); 1495