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) 2018-2019 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, newname); 149 150 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 151 152 return 0; 153 } 154 155 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 156 struct net *net) 157 { 158 struct wireless_dev *wdev; 159 int err = 0; 160 161 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 162 return -EOPNOTSUPP; 163 164 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 165 if (!wdev->netdev) 166 continue; 167 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 168 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 169 if (err) 170 break; 171 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 172 } 173 174 if (err) { 175 /* failed -- clean up to old netns */ 176 net = wiphy_net(&rdev->wiphy); 177 178 list_for_each_entry_continue_reverse(wdev, 179 &rdev->wiphy.wdev_list, 180 list) { 181 if (!wdev->netdev) 182 continue; 183 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 184 err = dev_change_net_namespace(wdev->netdev, net, 185 "wlan%d"); 186 WARN_ON(err); 187 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 188 } 189 190 return err; 191 } 192 193 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 194 if (!wdev->netdev) 195 continue; 196 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 197 } 198 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 199 200 wiphy_net_set(&rdev->wiphy, net); 201 202 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); 203 WARN_ON(err); 204 205 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 206 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 207 if (!wdev->netdev) 208 continue; 209 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 210 } 211 212 return 0; 213 } 214 215 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 216 { 217 struct cfg80211_registered_device *rdev = data; 218 219 rdev_rfkill_poll(rdev); 220 } 221 222 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 223 struct wireless_dev *wdev) 224 { 225 ASSERT_RTNL(); 226 227 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) 228 return; 229 230 if (!wdev_running(wdev)) 231 return; 232 233 rdev_stop_p2p_device(rdev, wdev); 234 wdev->is_running = false; 235 236 rdev->opencount--; 237 238 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 239 if (WARN_ON(!rdev->scan_req->notified)) 240 rdev->scan_req->info.aborted = true; 241 ___cfg80211_scan_done(rdev, false); 242 } 243 } 244 245 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 246 struct wireless_dev *wdev) 247 { 248 ASSERT_RTNL(); 249 250 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) 251 return; 252 253 if (!wdev_running(wdev)) 254 return; 255 256 rdev_stop_nan(rdev, wdev); 257 wdev->is_running = false; 258 259 rdev->opencount--; 260 } 261 262 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) 263 { 264 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 265 struct wireless_dev *wdev; 266 267 ASSERT_RTNL(); 268 269 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 270 if (wdev->netdev) { 271 dev_close(wdev->netdev); 272 continue; 273 } 274 /* otherwise, check iftype */ 275 switch (wdev->iftype) { 276 case NL80211_IFTYPE_P2P_DEVICE: 277 cfg80211_stop_p2p_device(rdev, wdev); 278 break; 279 case NL80211_IFTYPE_NAN: 280 cfg80211_stop_nan(rdev, wdev); 281 break; 282 default: 283 break; 284 } 285 } 286 } 287 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); 288 289 static int cfg80211_rfkill_set_block(void *data, bool blocked) 290 { 291 struct cfg80211_registered_device *rdev = data; 292 293 if (!blocked) 294 return 0; 295 296 rtnl_lock(); 297 cfg80211_shutdown_all_interfaces(&rdev->wiphy); 298 rtnl_unlock(); 299 300 return 0; 301 } 302 303 static void cfg80211_rfkill_block_work(struct work_struct *work) 304 { 305 struct cfg80211_registered_device *rdev; 306 307 rdev = container_of(work, struct cfg80211_registered_device, 308 rfkill_block); 309 cfg80211_rfkill_set_block(rdev, true); 310 } 311 312 static void cfg80211_event_work(struct work_struct *work) 313 { 314 struct cfg80211_registered_device *rdev; 315 316 rdev = container_of(work, struct cfg80211_registered_device, 317 event_work); 318 319 rtnl_lock(); 320 cfg80211_process_rdev_events(rdev); 321 rtnl_unlock(); 322 } 323 324 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) 325 { 326 struct wireless_dev *wdev, *tmp; 327 328 ASSERT_RTNL(); 329 330 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { 331 if (wdev->nl_owner_dead) 332 rdev_del_virtual_intf(rdev, wdev); 333 } 334 } 335 336 static void cfg80211_destroy_iface_wk(struct work_struct *work) 337 { 338 struct cfg80211_registered_device *rdev; 339 340 rdev = container_of(work, struct cfg80211_registered_device, 341 destroy_work); 342 343 rtnl_lock(); 344 cfg80211_destroy_ifaces(rdev); 345 rtnl_unlock(); 346 } 347 348 static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 349 { 350 struct cfg80211_registered_device *rdev; 351 struct cfg80211_sched_scan_request *req, *tmp; 352 353 rdev = container_of(work, struct cfg80211_registered_device, 354 sched_scan_stop_wk); 355 356 rtnl_lock(); 357 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { 358 if (req->nl_owner_dead) 359 cfg80211_stop_sched_scan_req(rdev, req, false); 360 } 361 rtnl_unlock(); 362 } 363 364 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) 365 { 366 struct cfg80211_registered_device *rdev; 367 368 rdev = container_of(work, struct cfg80211_registered_device, 369 propagate_radar_detect_wk); 370 371 rtnl_lock(); 372 373 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, 374 NL80211_DFS_UNAVAILABLE, 375 NL80211_RADAR_DETECTED); 376 377 rtnl_unlock(); 378 } 379 380 static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 381 { 382 struct cfg80211_registered_device *rdev; 383 384 rdev = container_of(work, struct cfg80211_registered_device, 385 propagate_cac_done_wk); 386 387 rtnl_lock(); 388 389 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, 390 NL80211_DFS_AVAILABLE, 391 NL80211_RADAR_CAC_FINISHED); 392 393 rtnl_unlock(); 394 } 395 396 /* exported functions */ 397 398 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, 399 const char *requested_name) 400 { 401 static atomic_t wiphy_counter = ATOMIC_INIT(0); 402 403 struct cfg80211_registered_device *rdev; 404 int alloc_size; 405 406 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 407 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 408 WARN_ON(ops->connect && !ops->disconnect); 409 WARN_ON(ops->join_ibss && !ops->leave_ibss); 410 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 411 WARN_ON(ops->add_station && !ops->del_station); 412 WARN_ON(ops->add_mpath && !ops->del_mpath); 413 WARN_ON(ops->join_mesh && !ops->leave_mesh); 414 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); 415 WARN_ON(ops->start_ap && !ops->stop_ap); 416 WARN_ON(ops->join_ocb && !ops->leave_ocb); 417 WARN_ON(ops->suspend && !ops->resume); 418 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); 419 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); 420 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); 421 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); 422 423 alloc_size = sizeof(*rdev) + sizeof_priv; 424 425 rdev = kzalloc(alloc_size, GFP_KERNEL); 426 if (!rdev) 427 return NULL; 428 429 rdev->ops = ops; 430 431 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); 432 433 if (unlikely(rdev->wiphy_idx < 0)) { 434 /* ugh, wrapped! */ 435 atomic_dec(&wiphy_counter); 436 kfree(rdev); 437 return NULL; 438 } 439 440 /* atomic_inc_return makes it start at 1, make it start at 0 */ 441 rdev->wiphy_idx--; 442 443 /* give it a proper name */ 444 if (requested_name && requested_name[0]) { 445 int rv; 446 447 rtnl_lock(); 448 rv = cfg80211_dev_check_name(rdev, requested_name); 449 450 if (rv < 0) { 451 rtnl_unlock(); 452 goto use_default_name; 453 } 454 455 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); 456 rtnl_unlock(); 457 if (rv) 458 goto use_default_name; 459 } else { 460 int rv; 461 462 use_default_name: 463 /* NOTE: This is *probably* safe w/out holding rtnl because of 464 * the restrictions on phy names. Probably this call could 465 * fail if some other part of the kernel (re)named a device 466 * phyX. But, might should add some locking and check return 467 * value, and use a different name if this one exists? 468 */ 469 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 470 if (rv < 0) { 471 kfree(rdev); 472 return NULL; 473 } 474 } 475 476 INIT_LIST_HEAD(&rdev->wiphy.wdev_list); 477 INIT_LIST_HEAD(&rdev->beacon_registrations); 478 spin_lock_init(&rdev->beacon_registrations_lock); 479 spin_lock_init(&rdev->bss_lock); 480 INIT_LIST_HEAD(&rdev->bss_list); 481 INIT_LIST_HEAD(&rdev->sched_scan_req_list); 482 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 483 INIT_LIST_HEAD(&rdev->mlme_unreg); 484 spin_lock_init(&rdev->mlme_unreg_lock); 485 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); 486 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, 487 cfg80211_dfs_channels_update_work); 488 #ifdef CONFIG_CFG80211_WEXT 489 rdev->wiphy.wext = &cfg80211_wext_handler; 490 #endif 491 492 device_initialize(&rdev->wiphy.dev); 493 rdev->wiphy.dev.class = &ieee80211_class; 494 rdev->wiphy.dev.platform_data = rdev; 495 device_enable_async_suspend(&rdev->wiphy.dev); 496 497 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); 498 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); 499 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); 500 INIT_WORK(&rdev->propagate_radar_detect_wk, 501 cfg80211_propagate_radar_detect_wk); 502 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); 503 504 #ifdef CONFIG_CFG80211_DEFAULT_PS 505 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 506 #endif 507 508 wiphy_net_set(&rdev->wiphy, &init_net); 509 510 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 511 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 512 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 513 &rdev->rfkill_ops, rdev); 514 515 if (!rdev->rfkill) { 516 wiphy_free(&rdev->wiphy); 517 return NULL; 518 } 519 520 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); 521 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 522 INIT_WORK(&rdev->event_work, cfg80211_event_work); 523 524 init_waitqueue_head(&rdev->dev_wait); 525 526 /* 527 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 528 * Fragmentation and RTS threshold are disabled by default with the 529 * special -1 value. 530 */ 531 rdev->wiphy.retry_short = 7; 532 rdev->wiphy.retry_long = 4; 533 rdev->wiphy.frag_threshold = (u32) -1; 534 rdev->wiphy.rts_threshold = (u32) -1; 535 rdev->wiphy.coverage_class = 0; 536 537 rdev->wiphy.max_num_csa_counters = 1; 538 539 rdev->wiphy.max_sched_scan_plans = 1; 540 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; 541 542 return &rdev->wiphy; 543 } 544 EXPORT_SYMBOL(wiphy_new_nm); 545 546 static int wiphy_verify_combinations(struct wiphy *wiphy) 547 { 548 const struct ieee80211_iface_combination *c; 549 int i, j; 550 551 for (i = 0; i < wiphy->n_iface_combinations; i++) { 552 u32 cnt = 0; 553 u16 all_iftypes = 0; 554 555 c = &wiphy->iface_combinations[i]; 556 557 /* 558 * Combinations with just one interface aren't real, 559 * however we make an exception for DFS. 560 */ 561 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) 562 return -EINVAL; 563 564 /* Need at least one channel */ 565 if (WARN_ON(!c->num_different_channels)) 566 return -EINVAL; 567 568 /* 569 * Put a sane limit on maximum number of different 570 * channels to simplify channel accounting code. 571 */ 572 if (WARN_ON(c->num_different_channels > 573 CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) 574 return -EINVAL; 575 576 /* DFS only works on one channel. */ 577 if (WARN_ON(c->radar_detect_widths && 578 (c->num_different_channels > 1))) 579 return -EINVAL; 580 581 if (WARN_ON(!c->n_limits)) 582 return -EINVAL; 583 584 for (j = 0; j < c->n_limits; j++) { 585 u16 types = c->limits[j].types; 586 587 /* interface types shouldn't overlap */ 588 if (WARN_ON(types & all_iftypes)) 589 return -EINVAL; 590 all_iftypes |= types; 591 592 if (WARN_ON(!c->limits[j].max)) 593 return -EINVAL; 594 595 /* Shouldn't list software iftypes in combinations! */ 596 if (WARN_ON(wiphy->software_iftypes & types)) 597 return -EINVAL; 598 599 /* Only a single P2P_DEVICE can be allowed */ 600 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && 601 c->limits[j].max > 1)) 602 return -EINVAL; 603 604 /* Only a single NAN can be allowed */ 605 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && 606 c->limits[j].max > 1)) 607 return -EINVAL; 608 609 /* 610 * This isn't well-defined right now. If you have an 611 * IBSS interface, then its beacon interval may change 612 * by joining other networks, and nothing prevents it 613 * from doing that. 614 * So technically we probably shouldn't even allow AP 615 * and IBSS in the same interface, but it seems that 616 * some drivers support that, possibly only with fixed 617 * beacon intervals for IBSS. 618 */ 619 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && 620 c->beacon_int_min_gcd)) { 621 return -EINVAL; 622 } 623 624 cnt += c->limits[j].max; 625 /* 626 * Don't advertise an unsupported type 627 * in a combination. 628 */ 629 if (WARN_ON((wiphy->interface_modes & types) != types)) 630 return -EINVAL; 631 } 632 633 #ifndef CONFIG_WIRELESS_WDS 634 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) 635 return -EINVAL; 636 #endif 637 638 /* You can't even choose that many! */ 639 if (WARN_ON(cnt < c->max_interfaces)) 640 return -EINVAL; 641 } 642 643 return 0; 644 } 645 646 int wiphy_register(struct wiphy *wiphy) 647 { 648 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 649 int res; 650 enum nl80211_band band; 651 struct ieee80211_supported_band *sband; 652 bool have_band = false; 653 int i; 654 u16 ifmodes = wiphy->interface_modes; 655 656 #ifdef CONFIG_PM 657 if (WARN_ON(wiphy->wowlan && 658 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 659 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) 660 return -EINVAL; 661 if (WARN_ON(wiphy->wowlan && 662 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && 663 !wiphy->wowlan->tcp)) 664 return -EINVAL; 665 #endif 666 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 667 (!rdev->ops->tdls_channel_switch || 668 !rdev->ops->tdls_cancel_channel_switch))) 669 return -EINVAL; 670 671 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && 672 (!rdev->ops->start_nan || !rdev->ops->stop_nan || 673 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || 674 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) 675 return -EINVAL; 676 677 #ifndef CONFIG_WIRELESS_WDS 678 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) 679 return -EINVAL; 680 #endif 681 682 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) 683 return -EINVAL; 684 685 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { 686 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && 687 !wiphy->pmsr_capa->ftm.non_asap)) 688 return -EINVAL; 689 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || 690 !wiphy->pmsr_capa->ftm.bandwidths)) 691 return -EINVAL; 692 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & 693 ~(BIT(NL80211_PREAMBLE_LEGACY) | 694 BIT(NL80211_PREAMBLE_HT) | 695 BIT(NL80211_PREAMBLE_VHT) | 696 BIT(NL80211_PREAMBLE_HE) | 697 BIT(NL80211_PREAMBLE_DMG)))) 698 return -EINVAL; 699 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || 700 wiphy->pmsr_capa->ftm.non_trigger_based) && 701 !(wiphy->pmsr_capa->ftm.preambles & 702 BIT(NL80211_PREAMBLE_HE)))) 703 return -EINVAL; 704 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & 705 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | 706 BIT(NL80211_CHAN_WIDTH_20) | 707 BIT(NL80211_CHAN_WIDTH_40) | 708 BIT(NL80211_CHAN_WIDTH_80) | 709 BIT(NL80211_CHAN_WIDTH_80P80) | 710 BIT(NL80211_CHAN_WIDTH_160) | 711 BIT(NL80211_CHAN_WIDTH_5) | 712 BIT(NL80211_CHAN_WIDTH_10)))) 713 return -EINVAL; 714 } 715 716 /* 717 * if a wiphy has unsupported modes for regulatory channel enforcement, 718 * opt-out of enforcement checking 719 */ 720 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | 721 BIT(NL80211_IFTYPE_P2P_CLIENT) | 722 BIT(NL80211_IFTYPE_AP) | 723 BIT(NL80211_IFTYPE_P2P_GO) | 724 BIT(NL80211_IFTYPE_ADHOC) | 725 BIT(NL80211_IFTYPE_P2P_DEVICE) | 726 BIT(NL80211_IFTYPE_NAN) | 727 BIT(NL80211_IFTYPE_AP_VLAN) | 728 BIT(NL80211_IFTYPE_MONITOR))) 729 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; 730 731 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && 732 (wiphy->regulatory_flags & 733 (REGULATORY_CUSTOM_REG | 734 REGULATORY_STRICT_REG | 735 REGULATORY_COUNTRY_IE_FOLLOW_POWER | 736 REGULATORY_COUNTRY_IE_IGNORE)))) 737 return -EINVAL; 738 739 if (WARN_ON(wiphy->coalesce && 740 (!wiphy->coalesce->n_rules || 741 !wiphy->coalesce->n_patterns) && 742 (!wiphy->coalesce->pattern_min_len || 743 wiphy->coalesce->pattern_min_len > 744 wiphy->coalesce->pattern_max_len))) 745 return -EINVAL; 746 747 if (WARN_ON(wiphy->ap_sme_capa && 748 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) 749 return -EINVAL; 750 751 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) 752 return -EINVAL; 753 754 if (WARN_ON(wiphy->addresses && 755 !is_zero_ether_addr(wiphy->perm_addr) && 756 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, 757 ETH_ALEN))) 758 return -EINVAL; 759 760 if (WARN_ON(wiphy->max_acl_mac_addrs && 761 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || 762 !rdev->ops->set_mac_acl))) 763 return -EINVAL; 764 765 /* assure only valid behaviours are flagged by driver 766 * hence subtract 2 as bit 0 is invalid. 767 */ 768 if (WARN_ON(wiphy->bss_select_support && 769 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) 770 return -EINVAL; 771 772 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, 773 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && 774 (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) 775 return -EINVAL; 776 777 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 778 rdev->ops->update_connect_params)) 779 return -EINVAL; 780 781 if (wiphy->addresses) 782 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); 783 784 /* sanity check ifmodes */ 785 WARN_ON(!ifmodes); 786 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; 787 if (WARN_ON(ifmodes != wiphy->interface_modes)) 788 wiphy->interface_modes = ifmodes; 789 790 res = wiphy_verify_combinations(wiphy); 791 if (res) 792 return res; 793 794 /* sanity check supported bands/channels */ 795 for (band = 0; band < NUM_NL80211_BANDS; band++) { 796 u16 types = 0; 797 798 sband = wiphy->bands[band]; 799 if (!sband) 800 continue; 801 802 sband->band = band; 803 if (WARN_ON(!sband->n_channels)) 804 return -EINVAL; 805 /* 806 * on 60GHz band, there are no legacy rates, so 807 * n_bitrates is 0 808 */ 809 if (WARN_ON(band != NL80211_BAND_60GHZ && 810 !sband->n_bitrates)) 811 return -EINVAL; 812 813 /* 814 * Since cfg80211_disable_40mhz_24ghz is global, we can 815 * modify the sband's ht data even if the driver uses a 816 * global structure for that. 817 */ 818 if (cfg80211_disable_40mhz_24ghz && 819 band == NL80211_BAND_2GHZ && 820 sband->ht_cap.ht_supported) { 821 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 822 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; 823 } 824 825 /* 826 * Since we use a u32 for rate bitmaps in 827 * ieee80211_get_response_rate, we cannot 828 * have more than 32 legacy rates. 829 */ 830 if (WARN_ON(sband->n_bitrates > 32)) 831 return -EINVAL; 832 833 for (i = 0; i < sband->n_channels; i++) { 834 sband->channels[i].orig_flags = 835 sband->channels[i].flags; 836 sband->channels[i].orig_mag = INT_MAX; 837 sband->channels[i].orig_mpwr = 838 sband->channels[i].max_power; 839 sband->channels[i].band = band; 840 } 841 842 for (i = 0; i < sband->n_iftype_data; i++) { 843 const struct ieee80211_sband_iftype_data *iftd; 844 845 iftd = &sband->iftype_data[i]; 846 847 if (WARN_ON(!iftd->types_mask)) 848 return -EINVAL; 849 if (WARN_ON(types & iftd->types_mask)) 850 return -EINVAL; 851 852 /* at least one piece of information must be present */ 853 if (WARN_ON(!iftd->he_cap.has_he)) 854 return -EINVAL; 855 856 types |= iftd->types_mask; 857 } 858 859 have_band = true; 860 } 861 862 if (!have_band) { 863 WARN_ON(1); 864 return -EINVAL; 865 } 866 867 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 868 /* 869 * Validate we have a policy (can be explicitly set to 870 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that 871 * we have at least one of doit/dumpit. 872 */ 873 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) 874 return -EINVAL; 875 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && 876 !rdev->wiphy.vendor_commands[i].dumpit)) 877 return -EINVAL; 878 } 879 880 #ifdef CONFIG_PM 881 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && 882 (!rdev->wiphy.wowlan->pattern_min_len || 883 rdev->wiphy.wowlan->pattern_min_len > 884 rdev->wiphy.wowlan->pattern_max_len))) 885 return -EINVAL; 886 #endif 887 888 /* check and set up bitrates */ 889 ieee80211_set_bitrate_flags(wiphy); 890 891 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; 892 893 rtnl_lock(); 894 res = device_add(&rdev->wiphy.dev); 895 if (res) { 896 rtnl_unlock(); 897 return res; 898 } 899 900 /* set up regulatory info */ 901 wiphy_regulatory_register(wiphy); 902 903 list_add_rcu(&rdev->list, &cfg80211_rdev_list); 904 cfg80211_rdev_list_generation++; 905 906 /* add to debugfs */ 907 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy), 908 ieee80211_debugfs_dir); 909 910 cfg80211_debugfs_rdev_add(rdev); 911 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); 912 913 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 914 struct regulatory_request request; 915 916 request.wiphy_idx = get_wiphy_idx(wiphy); 917 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 918 request.alpha2[0] = '9'; 919 request.alpha2[1] = '9'; 920 921 nl80211_send_reg_change_event(&request); 922 } 923 924 /* Check that nobody globally advertises any capabilities they do not 925 * advertise on all possible interface types. 926 */ 927 if (wiphy->extended_capabilities_len && 928 wiphy->num_iftype_ext_capab && 929 wiphy->iftype_ext_capab) { 930 u8 supported_on_all, j; 931 const struct wiphy_iftype_ext_capab *capab; 932 933 capab = wiphy->iftype_ext_capab; 934 for (j = 0; j < wiphy->extended_capabilities_len; j++) { 935 if (capab[0].extended_capabilities_len > j) 936 supported_on_all = 937 capab[0].extended_capabilities[j]; 938 else 939 supported_on_all = 0x00; 940 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { 941 if (j >= capab[i].extended_capabilities_len) { 942 supported_on_all = 0x00; 943 break; 944 } 945 supported_on_all &= 946 capab[i].extended_capabilities[j]; 947 } 948 if (WARN_ON(wiphy->extended_capabilities[j] & 949 ~supported_on_all)) 950 break; 951 } 952 } 953 954 rdev->wiphy.registered = true; 955 rtnl_unlock(); 956 957 res = rfkill_register(rdev->rfkill); 958 if (res) { 959 rfkill_destroy(rdev->rfkill); 960 rdev->rfkill = NULL; 961 wiphy_unregister(&rdev->wiphy); 962 return res; 963 } 964 965 return 0; 966 } 967 EXPORT_SYMBOL(wiphy_register); 968 969 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 970 { 971 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 972 973 if (!rdev->ops->rfkill_poll) 974 return; 975 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 976 rfkill_resume_polling(rdev->rfkill); 977 } 978 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 979 980 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 981 { 982 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 983 984 rfkill_pause_polling(rdev->rfkill); 985 } 986 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 987 988 void wiphy_unregister(struct wiphy *wiphy) 989 { 990 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 991 992 wait_event(rdev->dev_wait, ({ 993 int __count; 994 rtnl_lock(); 995 __count = rdev->opencount; 996 rtnl_unlock(); 997 __count == 0; })); 998 999 if (rdev->rfkill) 1000 rfkill_unregister(rdev->rfkill); 1001 1002 rtnl_lock(); 1003 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); 1004 rdev->wiphy.registered = false; 1005 1006 WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); 1007 1008 /* 1009 * First remove the hardware from everywhere, this makes 1010 * it impossible to find from userspace. 1011 */ 1012 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 1013 list_del_rcu(&rdev->list); 1014 synchronize_rcu(); 1015 1016 /* 1017 * If this device got a regulatory hint tell core its 1018 * free to listen now to a new shiny device regulatory hint 1019 */ 1020 wiphy_regulatory_deregister(wiphy); 1021 1022 cfg80211_rdev_list_generation++; 1023 device_del(&rdev->wiphy.dev); 1024 1025 rtnl_unlock(); 1026 1027 flush_work(&rdev->scan_done_wk); 1028 cancel_work_sync(&rdev->conn_work); 1029 flush_work(&rdev->event_work); 1030 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); 1031 flush_work(&rdev->destroy_work); 1032 flush_work(&rdev->sched_scan_stop_wk); 1033 flush_work(&rdev->mlme_unreg_wk); 1034 flush_work(&rdev->propagate_radar_detect_wk); 1035 flush_work(&rdev->propagate_cac_done_wk); 1036 1037 #ifdef CONFIG_PM 1038 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) 1039 rdev_set_wakeup(rdev, false); 1040 #endif 1041 cfg80211_rdev_free_wowlan(rdev); 1042 cfg80211_rdev_free_coalesce(rdev); 1043 } 1044 EXPORT_SYMBOL(wiphy_unregister); 1045 1046 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 1047 { 1048 struct cfg80211_internal_bss *scan, *tmp; 1049 struct cfg80211_beacon_registration *reg, *treg; 1050 rfkill_destroy(rdev->rfkill); 1051 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { 1052 list_del(®->list); 1053 kfree(reg); 1054 } 1055 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 1056 cfg80211_put_bss(&rdev->wiphy, &scan->pub); 1057 kfree(rdev); 1058 } 1059 1060 void wiphy_free(struct wiphy *wiphy) 1061 { 1062 put_device(&wiphy->dev); 1063 } 1064 EXPORT_SYMBOL(wiphy_free); 1065 1066 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 1067 { 1068 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1069 1070 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 1071 schedule_work(&rdev->rfkill_block); 1072 } 1073 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 1074 1075 void cfg80211_cqm_config_free(struct wireless_dev *wdev) 1076 { 1077 kfree(wdev->cqm_config); 1078 wdev->cqm_config = NULL; 1079 } 1080 1081 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync) 1082 { 1083 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1084 1085 ASSERT_RTNL(); 1086 1087 flush_work(&wdev->pmsr_free_wk); 1088 1089 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); 1090 1091 list_del_rcu(&wdev->list); 1092 if (sync) 1093 synchronize_rcu(); 1094 rdev->devlist_generation++; 1095 1096 cfg80211_mlme_purge_registrations(wdev); 1097 1098 switch (wdev->iftype) { 1099 case NL80211_IFTYPE_P2P_DEVICE: 1100 cfg80211_stop_p2p_device(rdev, wdev); 1101 break; 1102 case NL80211_IFTYPE_NAN: 1103 cfg80211_stop_nan(rdev, wdev); 1104 break; 1105 default: 1106 break; 1107 } 1108 1109 #ifdef CONFIG_CFG80211_WEXT 1110 kzfree(wdev->wext.keys); 1111 wdev->wext.keys = NULL; 1112 #endif 1113 /* only initialized if we have a netdev */ 1114 if (wdev->netdev) 1115 flush_work(&wdev->disconnect_wk); 1116 1117 cfg80211_cqm_config_free(wdev); 1118 } 1119 1120 void cfg80211_unregister_wdev(struct wireless_dev *wdev) 1121 { 1122 if (WARN_ON(wdev->netdev)) 1123 return; 1124 1125 __cfg80211_unregister_wdev(wdev, true); 1126 } 1127 EXPORT_SYMBOL(cfg80211_unregister_wdev); 1128 1129 static const struct device_type wiphy_type = { 1130 .name = "wlan", 1131 }; 1132 1133 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 1134 enum nl80211_iftype iftype, int num) 1135 { 1136 ASSERT_RTNL(); 1137 1138 rdev->num_running_ifaces += num; 1139 if (iftype == NL80211_IFTYPE_MONITOR) 1140 rdev->num_running_monitor_ifaces += num; 1141 } 1142 1143 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 1144 struct wireless_dev *wdev) 1145 { 1146 struct net_device *dev = wdev->netdev; 1147 struct cfg80211_sched_scan_request *pos, *tmp; 1148 1149 ASSERT_RTNL(); 1150 ASSERT_WDEV_LOCK(wdev); 1151 1152 cfg80211_pmsr_wdev_down(wdev); 1153 1154 switch (wdev->iftype) { 1155 case NL80211_IFTYPE_ADHOC: 1156 __cfg80211_leave_ibss(rdev, dev, true); 1157 break; 1158 case NL80211_IFTYPE_P2P_CLIENT: 1159 case NL80211_IFTYPE_STATION: 1160 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, 1161 list) { 1162 if (dev == pos->dev) 1163 cfg80211_stop_sched_scan_req(rdev, pos, false); 1164 } 1165 1166 #ifdef CONFIG_CFG80211_WEXT 1167 kfree(wdev->wext.ie); 1168 wdev->wext.ie = NULL; 1169 wdev->wext.ie_len = 0; 1170 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1171 #endif 1172 cfg80211_disconnect(rdev, dev, 1173 WLAN_REASON_DEAUTH_LEAVING, true); 1174 break; 1175 case NL80211_IFTYPE_MESH_POINT: 1176 __cfg80211_leave_mesh(rdev, dev); 1177 break; 1178 case NL80211_IFTYPE_AP: 1179 case NL80211_IFTYPE_P2P_GO: 1180 __cfg80211_stop_ap(rdev, dev, true); 1181 break; 1182 case NL80211_IFTYPE_OCB: 1183 __cfg80211_leave_ocb(rdev, dev); 1184 break; 1185 case NL80211_IFTYPE_WDS: 1186 /* must be handled by mac80211/driver, has no APIs */ 1187 break; 1188 case NL80211_IFTYPE_P2P_DEVICE: 1189 case NL80211_IFTYPE_NAN: 1190 /* cannot happen, has no netdev */ 1191 break; 1192 case NL80211_IFTYPE_AP_VLAN: 1193 case NL80211_IFTYPE_MONITOR: 1194 /* nothing to do */ 1195 break; 1196 case NL80211_IFTYPE_UNSPECIFIED: 1197 case NUM_NL80211_IFTYPES: 1198 /* invalid */ 1199 break; 1200 } 1201 } 1202 1203 void cfg80211_leave(struct cfg80211_registered_device *rdev, 1204 struct wireless_dev *wdev) 1205 { 1206 wdev_lock(wdev); 1207 __cfg80211_leave(rdev, wdev); 1208 wdev_unlock(wdev); 1209 } 1210 1211 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, 1212 gfp_t gfp) 1213 { 1214 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1215 struct cfg80211_event *ev; 1216 unsigned long flags; 1217 1218 trace_cfg80211_stop_iface(wiphy, wdev); 1219 1220 ev = kzalloc(sizeof(*ev), gfp); 1221 if (!ev) 1222 return; 1223 1224 ev->type = EVENT_STOPPED; 1225 1226 spin_lock_irqsave(&wdev->event_lock, flags); 1227 list_add_tail(&ev->list, &wdev->event_list); 1228 spin_unlock_irqrestore(&wdev->event_lock, flags); 1229 queue_work(cfg80211_wq, &rdev->event_work); 1230 } 1231 EXPORT_SYMBOL(cfg80211_stop_iface); 1232 1233 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 1234 struct wireless_dev *wdev) 1235 { 1236 mutex_init(&wdev->mtx); 1237 INIT_LIST_HEAD(&wdev->event_list); 1238 spin_lock_init(&wdev->event_lock); 1239 INIT_LIST_HEAD(&wdev->mgmt_registrations); 1240 spin_lock_init(&wdev->mgmt_registrations_lock); 1241 INIT_LIST_HEAD(&wdev->pmsr_list); 1242 spin_lock_init(&wdev->pmsr_lock); 1243 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); 1244 1245 /* 1246 * We get here also when the interface changes network namespaces, 1247 * as it's registered into the new one, but we don't want it to 1248 * change ID in that case. Checking if the ID is already assigned 1249 * works, because 0 isn't considered a valid ID and the memory is 1250 * 0-initialized. 1251 */ 1252 if (!wdev->identifier) 1253 wdev->identifier = ++rdev->wdev_id; 1254 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 1255 rdev->devlist_generation++; 1256 1257 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); 1258 } 1259 1260 static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 1261 unsigned long state, void *ptr) 1262 { 1263 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1264 struct wireless_dev *wdev = dev->ieee80211_ptr; 1265 struct cfg80211_registered_device *rdev; 1266 struct cfg80211_sched_scan_request *pos, *tmp; 1267 1268 if (!wdev) 1269 return NOTIFY_DONE; 1270 1271 rdev = wiphy_to_rdev(wdev->wiphy); 1272 1273 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 1274 1275 switch (state) { 1276 case NETDEV_POST_INIT: 1277 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 1278 break; 1279 case NETDEV_REGISTER: 1280 /* 1281 * NB: cannot take rdev->mtx here because this may be 1282 * called within code protected by it when interfaces 1283 * are added with nl80211. 1284 */ 1285 /* can only change netns with wiphy */ 1286 dev->features |= NETIF_F_NETNS_LOCAL; 1287 1288 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 1289 "phy80211")) { 1290 pr_err("failed to add phy80211 symlink to netdev!\n"); 1291 } 1292 wdev->netdev = dev; 1293 #ifdef CONFIG_CFG80211_WEXT 1294 wdev->wext.default_key = -1; 1295 wdev->wext.default_mgmt_key = -1; 1296 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 1297 #endif 1298 1299 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 1300 wdev->ps = true; 1301 else 1302 wdev->ps = false; 1303 /* allow mac80211 to determine the timeout */ 1304 wdev->ps_timeout = -1; 1305 1306 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1307 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || 1308 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 1309 dev->priv_flags |= IFF_DONT_BRIDGE; 1310 1311 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); 1312 1313 cfg80211_init_wdev(rdev, wdev); 1314 break; 1315 case NETDEV_GOING_DOWN: 1316 cfg80211_leave(rdev, wdev); 1317 break; 1318 case NETDEV_DOWN: 1319 cfg80211_update_iface_num(rdev, wdev->iftype, -1); 1320 if (rdev->scan_req && rdev->scan_req->wdev == wdev) { 1321 if (WARN_ON(!rdev->scan_req->notified)) 1322 rdev->scan_req->info.aborted = true; 1323 ___cfg80211_scan_done(rdev, false); 1324 } 1325 1326 list_for_each_entry_safe(pos, tmp, 1327 &rdev->sched_scan_req_list, list) { 1328 if (WARN_ON(pos->dev == wdev->netdev)) 1329 cfg80211_stop_sched_scan_req(rdev, pos, false); 1330 } 1331 1332 rdev->opencount--; 1333 wake_up(&rdev->dev_wait); 1334 break; 1335 case NETDEV_UP: 1336 cfg80211_update_iface_num(rdev, wdev->iftype, 1); 1337 wdev_lock(wdev); 1338 switch (wdev->iftype) { 1339 #ifdef CONFIG_CFG80211_WEXT 1340 case NL80211_IFTYPE_ADHOC: 1341 cfg80211_ibss_wext_join(rdev, wdev); 1342 break; 1343 case NL80211_IFTYPE_STATION: 1344 cfg80211_mgd_wext_connect(rdev, wdev); 1345 break; 1346 #endif 1347 #ifdef CONFIG_MAC80211_MESH 1348 case NL80211_IFTYPE_MESH_POINT: 1349 { 1350 /* backward compat code... */ 1351 struct mesh_setup setup; 1352 memcpy(&setup, &default_mesh_setup, 1353 sizeof(setup)); 1354 /* back compat only needed for mesh_id */ 1355 setup.mesh_id = wdev->ssid; 1356 setup.mesh_id_len = wdev->mesh_id_up_len; 1357 if (wdev->mesh_id_up_len) 1358 __cfg80211_join_mesh(rdev, dev, 1359 &setup, 1360 &default_mesh_config); 1361 break; 1362 } 1363 #endif 1364 default: 1365 break; 1366 } 1367 wdev_unlock(wdev); 1368 rdev->opencount++; 1369 1370 /* 1371 * Configure power management to the driver here so that its 1372 * correctly set also after interface type changes etc. 1373 */ 1374 if ((wdev->iftype == NL80211_IFTYPE_STATION || 1375 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && 1376 rdev->ops->set_power_mgmt && 1377 rdev_set_power_mgmt(rdev, dev, wdev->ps, 1378 wdev->ps_timeout)) { 1379 /* assume this means it's off */ 1380 wdev->ps = false; 1381 } 1382 break; 1383 case NETDEV_UNREGISTER: 1384 /* 1385 * It is possible to get NETDEV_UNREGISTER 1386 * multiple times. To detect that, check 1387 * that the interface is still on the list 1388 * of registered interfaces, and only then 1389 * remove and clean it up. 1390 */ 1391 if (!list_empty(&wdev->list)) { 1392 __cfg80211_unregister_wdev(wdev, false); 1393 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 1394 } 1395 /* 1396 * synchronise (so that we won't find this netdev 1397 * from other code any more) and then clear the list 1398 * head so that the above code can safely check for 1399 * !list_empty() to avoid double-cleanup. 1400 */ 1401 synchronize_rcu(); 1402 INIT_LIST_HEAD(&wdev->list); 1403 /* 1404 * Ensure that all events have been processed and 1405 * freed. 1406 */ 1407 cfg80211_process_wdev_events(wdev); 1408 1409 if (WARN_ON(wdev->current_bss)) { 1410 cfg80211_unhold_bss(wdev->current_bss); 1411 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1412 wdev->current_bss = NULL; 1413 } 1414 break; 1415 case NETDEV_PRE_UP: 1416 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype, 1417 wdev->use_4addr, 0)) 1418 return notifier_from_errno(-EOPNOTSUPP); 1419 1420 if (rfkill_blocked(rdev->rfkill)) 1421 return notifier_from_errno(-ERFKILL); 1422 break; 1423 default: 1424 return NOTIFY_DONE; 1425 } 1426 1427 wireless_nlevent_flush(); 1428 1429 return NOTIFY_OK; 1430 } 1431 1432 static struct notifier_block cfg80211_netdev_notifier = { 1433 .notifier_call = cfg80211_netdev_notifier_call, 1434 }; 1435 1436 static void __net_exit cfg80211_pernet_exit(struct net *net) 1437 { 1438 struct cfg80211_registered_device *rdev; 1439 1440 rtnl_lock(); 1441 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1442 if (net_eq(wiphy_net(&rdev->wiphy), net)) 1443 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 1444 } 1445 rtnl_unlock(); 1446 } 1447 1448 static struct pernet_operations cfg80211_pernet_ops = { 1449 .exit = cfg80211_pernet_exit, 1450 }; 1451 1452 static int __init cfg80211_init(void) 1453 { 1454 int err; 1455 1456 err = register_pernet_device(&cfg80211_pernet_ops); 1457 if (err) 1458 goto out_fail_pernet; 1459 1460 err = wiphy_sysfs_init(); 1461 if (err) 1462 goto out_fail_sysfs; 1463 1464 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 1465 if (err) 1466 goto out_fail_notifier; 1467 1468 err = nl80211_init(); 1469 if (err) 1470 goto out_fail_nl80211; 1471 1472 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 1473 1474 err = regulatory_init(); 1475 if (err) 1476 goto out_fail_reg; 1477 1478 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); 1479 if (!cfg80211_wq) { 1480 err = -ENOMEM; 1481 goto out_fail_wq; 1482 } 1483 1484 return 0; 1485 1486 out_fail_wq: 1487 regulatory_exit(); 1488 out_fail_reg: 1489 debugfs_remove(ieee80211_debugfs_dir); 1490 nl80211_exit(); 1491 out_fail_nl80211: 1492 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1493 out_fail_notifier: 1494 wiphy_sysfs_exit(); 1495 out_fail_sysfs: 1496 unregister_pernet_device(&cfg80211_pernet_ops); 1497 out_fail_pernet: 1498 return err; 1499 } 1500 fs_initcall(cfg80211_init); 1501 1502 static void __exit cfg80211_exit(void) 1503 { 1504 debugfs_remove(ieee80211_debugfs_dir); 1505 nl80211_exit(); 1506 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 1507 wiphy_sysfs_exit(); 1508 regulatory_exit(); 1509 unregister_pernet_device(&cfg80211_pernet_ops); 1510 destroy_workqueue(cfg80211_wq); 1511 } 1512 module_exit(cfg80211_exit); 1513