1 /* 2 * This is the linux wireless configuration interface. 3 * 4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net> 5 */ 6 7 #include <linux/if.h> 8 #include <linux/module.h> 9 #include <linux/err.h> 10 #include <linux/list.h> 11 #include <linux/nl80211.h> 12 #include <linux/debugfs.h> 13 #include <linux/notifier.h> 14 #include <linux/device.h> 15 #include <linux/etherdevice.h> 16 #include <linux/rtnetlink.h> 17 #include <linux/sched.h> 18 #include <net/genetlink.h> 19 #include <net/cfg80211.h> 20 #include "nl80211.h" 21 #include "core.h" 22 #include "sysfs.h" 23 #include "debugfs.h" 24 #include "wext-compat.h" 25 #include "ethtool.h" 26 27 /* name for sysfs, %d is appended */ 28 #define PHY_NAME "phy" 29 30 MODULE_AUTHOR("Johannes Berg"); 31 MODULE_LICENSE("GPL"); 32 MODULE_DESCRIPTION("wireless configuration support"); 33 34 /* RCU might be appropriate here since we usually 35 * only read the list, and that can happen quite 36 * often because we need to do it for each command */ 37 LIST_HEAD(cfg80211_rdev_list); 38 int cfg80211_rdev_list_generation; 39 40 /* 41 * This is used to protect the cfg80211_rdev_list 42 */ 43 DEFINE_MUTEX(cfg80211_mutex); 44 45 /* for debugfs */ 46 static struct dentry *ieee80211_debugfs_dir; 47 48 /* for the cleanup, scan and event works */ 49 struct workqueue_struct *cfg80211_wq; 50 51 /* requires cfg80211_mutex to be held! */ 52 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) 53 { 54 struct cfg80211_registered_device *result = NULL, *rdev; 55 56 if (!wiphy_idx_valid(wiphy_idx)) 57 return NULL; 58 59 assert_cfg80211_lock(); 60 61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 62 if (rdev->wiphy_idx == wiphy_idx) { 63 result = rdev; 64 break; 65 } 66 } 67 68 return result; 69 } 70 71 int get_wiphy_idx(struct wiphy *wiphy) 72 { 73 struct cfg80211_registered_device *rdev; 74 if (!wiphy) 75 return WIPHY_IDX_STALE; 76 rdev = wiphy_to_dev(wiphy); 77 return rdev->wiphy_idx; 78 } 79 80 /* requires cfg80211_rdev_mutex to be held! */ 81 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) 82 { 83 struct cfg80211_registered_device *rdev; 84 85 if (!wiphy_idx_valid(wiphy_idx)) 86 return NULL; 87 88 assert_cfg80211_lock(); 89 90 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); 91 if (!rdev) 92 return NULL; 93 return &rdev->wiphy; 94 } 95 96 /* requires cfg80211_mutex to be held! */ 97 struct cfg80211_registered_device * 98 __cfg80211_rdev_from_info(struct genl_info *info) 99 { 100 int ifindex; 101 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; 102 struct net_device *dev; 103 int err = -EINVAL; 104 105 assert_cfg80211_lock(); 106 107 if (info->attrs[NL80211_ATTR_WIPHY]) { 108 bywiphyidx = cfg80211_rdev_by_wiphy_idx( 109 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); 110 err = -ENODEV; 111 } 112 113 if (info->attrs[NL80211_ATTR_IFINDEX]) { 114 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); 115 dev = dev_get_by_index(genl_info_net(info), ifindex); 116 if (dev) { 117 if (dev->ieee80211_ptr) 118 byifidx = 119 wiphy_to_dev(dev->ieee80211_ptr->wiphy); 120 dev_put(dev); 121 } 122 err = -ENODEV; 123 } 124 125 if (bywiphyidx && byifidx) { 126 if (bywiphyidx != byifidx) 127 return ERR_PTR(-EINVAL); 128 else 129 return bywiphyidx; /* == byifidx */ 130 } 131 if (bywiphyidx) 132 return bywiphyidx; 133 134 if (byifidx) 135 return byifidx; 136 137 return ERR_PTR(err); 138 } 139 140 struct cfg80211_registered_device * 141 cfg80211_get_dev_from_info(struct genl_info *info) 142 { 143 struct cfg80211_registered_device *rdev; 144 145 mutex_lock(&cfg80211_mutex); 146 rdev = __cfg80211_rdev_from_info(info); 147 148 /* if it is not an error we grab the lock on 149 * it to assure it won't be going away while 150 * we operate on it */ 151 if (!IS_ERR(rdev)) 152 mutex_lock(&rdev->mtx); 153 154 mutex_unlock(&cfg80211_mutex); 155 156 return rdev; 157 } 158 159 struct cfg80211_registered_device * 160 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) 161 { 162 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); 163 struct net_device *dev; 164 165 mutex_lock(&cfg80211_mutex); 166 dev = dev_get_by_index(net, ifindex); 167 if (!dev) 168 goto out; 169 if (dev->ieee80211_ptr) { 170 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); 171 mutex_lock(&rdev->mtx); 172 } else 173 rdev = ERR_PTR(-ENODEV); 174 dev_put(dev); 175 out: 176 mutex_unlock(&cfg80211_mutex); 177 return rdev; 178 } 179 180 /* requires cfg80211_mutex to be held */ 181 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 182 char *newname) 183 { 184 struct cfg80211_registered_device *rdev2; 185 int wiphy_idx, taken = -1, result, digits; 186 187 assert_cfg80211_lock(); 188 189 /* prohibit calling the thing phy%d when %d is not its number */ 190 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); 191 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { 192 /* count number of places needed to print wiphy_idx */ 193 digits = 1; 194 while (wiphy_idx /= 10) 195 digits++; 196 /* 197 * deny the name if it is phy<idx> where <idx> is printed 198 * without leading zeroes. taken == strlen(newname) here 199 */ 200 if (taken == strlen(PHY_NAME) + digits) 201 return -EINVAL; 202 } 203 204 205 /* Ignore nop renames */ 206 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) 207 return 0; 208 209 /* Ensure another device does not already have this name. */ 210 list_for_each_entry(rdev2, &cfg80211_rdev_list, list) 211 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) 212 return -EINVAL; 213 214 result = device_rename(&rdev->wiphy.dev, newname); 215 if (result) 216 return result; 217 218 if (rdev->wiphy.debugfsdir && 219 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, 220 rdev->wiphy.debugfsdir, 221 rdev->wiphy.debugfsdir->d_parent, 222 newname)) 223 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", 224 newname); 225 226 nl80211_notify_dev_rename(rdev); 227 228 return 0; 229 } 230 231 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 232 struct net *net) 233 { 234 struct wireless_dev *wdev; 235 int err = 0; 236 237 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) 238 return -EOPNOTSUPP; 239 240 list_for_each_entry(wdev, &rdev->netdev_list, list) { 241 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 242 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); 243 if (err) 244 break; 245 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 246 } 247 248 if (err) { 249 /* failed -- clean up to old netns */ 250 net = wiphy_net(&rdev->wiphy); 251 252 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, 253 list) { 254 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; 255 err = dev_change_net_namespace(wdev->netdev, net, 256 "wlan%d"); 257 WARN_ON(err); 258 wdev->netdev->features |= NETIF_F_NETNS_LOCAL; 259 } 260 } 261 262 wiphy_net_set(&rdev->wiphy, net); 263 264 return err; 265 } 266 267 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) 268 { 269 struct cfg80211_registered_device *rdev = data; 270 271 rdev->ops->rfkill_poll(&rdev->wiphy); 272 } 273 274 static int cfg80211_rfkill_set_block(void *data, bool blocked) 275 { 276 struct cfg80211_registered_device *rdev = data; 277 struct wireless_dev *wdev; 278 279 if (!blocked) 280 return 0; 281 282 rtnl_lock(); 283 mutex_lock(&rdev->devlist_mtx); 284 285 list_for_each_entry(wdev, &rdev->netdev_list, list) 286 dev_close(wdev->netdev); 287 288 mutex_unlock(&rdev->devlist_mtx); 289 rtnl_unlock(); 290 291 return 0; 292 } 293 294 static void cfg80211_rfkill_sync_work(struct work_struct *work) 295 { 296 struct cfg80211_registered_device *rdev; 297 298 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); 299 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); 300 } 301 302 static void cfg80211_event_work(struct work_struct *work) 303 { 304 struct cfg80211_registered_device *rdev; 305 306 rdev = container_of(work, struct cfg80211_registered_device, 307 event_work); 308 309 rtnl_lock(); 310 cfg80211_lock_rdev(rdev); 311 312 cfg80211_process_rdev_events(rdev); 313 cfg80211_unlock_rdev(rdev); 314 rtnl_unlock(); 315 } 316 317 /* exported functions */ 318 319 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) 320 { 321 static int wiphy_counter; 322 323 struct cfg80211_registered_device *rdev; 324 int alloc_size; 325 326 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); 327 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); 328 WARN_ON(ops->connect && !ops->disconnect); 329 WARN_ON(ops->join_ibss && !ops->leave_ibss); 330 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); 331 WARN_ON(ops->add_station && !ops->del_station); 332 WARN_ON(ops->add_mpath && !ops->del_mpath); 333 334 alloc_size = sizeof(*rdev) + sizeof_priv; 335 336 rdev = kzalloc(alloc_size, GFP_KERNEL); 337 if (!rdev) 338 return NULL; 339 340 rdev->ops = ops; 341 342 mutex_lock(&cfg80211_mutex); 343 344 rdev->wiphy_idx = wiphy_counter++; 345 346 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { 347 wiphy_counter--; 348 mutex_unlock(&cfg80211_mutex); 349 /* ugh, wrapped! */ 350 kfree(rdev); 351 return NULL; 352 } 353 354 mutex_unlock(&cfg80211_mutex); 355 356 /* give it a proper name */ 357 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); 358 359 mutex_init(&rdev->mtx); 360 mutex_init(&rdev->devlist_mtx); 361 INIT_LIST_HEAD(&rdev->netdev_list); 362 spin_lock_init(&rdev->bss_lock); 363 INIT_LIST_HEAD(&rdev->bss_list); 364 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); 365 366 #ifdef CONFIG_CFG80211_WEXT 367 rdev->wiphy.wext = &cfg80211_wext_handler; 368 #endif 369 370 device_initialize(&rdev->wiphy.dev); 371 rdev->wiphy.dev.class = &ieee80211_class; 372 rdev->wiphy.dev.platform_data = rdev; 373 374 #ifdef CONFIG_CFG80211_DEFAULT_PS 375 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 376 #endif 377 378 wiphy_net_set(&rdev->wiphy, &init_net); 379 380 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; 381 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), 382 &rdev->wiphy.dev, RFKILL_TYPE_WLAN, 383 &rdev->rfkill_ops, rdev); 384 385 if (!rdev->rfkill) { 386 kfree(rdev); 387 return NULL; 388 } 389 390 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); 391 INIT_WORK(&rdev->conn_work, cfg80211_conn_work); 392 INIT_WORK(&rdev->event_work, cfg80211_event_work); 393 394 init_waitqueue_head(&rdev->dev_wait); 395 396 /* 397 * Initialize wiphy parameters to IEEE 802.11 MIB default values. 398 * Fragmentation and RTS threshold are disabled by default with the 399 * special -1 value. 400 */ 401 rdev->wiphy.retry_short = 7; 402 rdev->wiphy.retry_long = 4; 403 rdev->wiphy.frag_threshold = (u32) -1; 404 rdev->wiphy.rts_threshold = (u32) -1; 405 406 return &rdev->wiphy; 407 } 408 EXPORT_SYMBOL(wiphy_new); 409 410 int wiphy_register(struct wiphy *wiphy) 411 { 412 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 413 int res; 414 enum ieee80211_band band; 415 struct ieee80211_supported_band *sband; 416 bool have_band = false; 417 int i; 418 u16 ifmodes = wiphy->interface_modes; 419 420 /* sanity check ifmodes */ 421 WARN_ON(!ifmodes); 422 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; 423 if (WARN_ON(ifmodes != wiphy->interface_modes)) 424 wiphy->interface_modes = ifmodes; 425 426 /* sanity check supported bands/channels */ 427 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 428 sband = wiphy->bands[band]; 429 if (!sband) 430 continue; 431 432 sband->band = band; 433 434 if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) 435 return -EINVAL; 436 437 /* 438 * Since we use a u32 for rate bitmaps in 439 * ieee80211_get_response_rate, we cannot 440 * have more than 32 legacy rates. 441 */ 442 if (WARN_ON(sband->n_bitrates > 32)) 443 return -EINVAL; 444 445 for (i = 0; i < sband->n_channels; i++) { 446 sband->channels[i].orig_flags = 447 sband->channels[i].flags; 448 sband->channels[i].orig_mag = 449 sband->channels[i].max_antenna_gain; 450 sband->channels[i].orig_mpwr = 451 sband->channels[i].max_power; 452 sband->channels[i].band = band; 453 } 454 455 have_band = true; 456 } 457 458 if (!have_band) { 459 WARN_ON(1); 460 return -EINVAL; 461 } 462 463 /* check and set up bitrates */ 464 ieee80211_set_bitrate_flags(wiphy); 465 466 res = device_add(&rdev->wiphy.dev); 467 if (res) 468 return res; 469 470 res = rfkill_register(rdev->rfkill); 471 if (res) 472 goto out_rm_dev; 473 474 mutex_lock(&cfg80211_mutex); 475 476 /* set up regulatory info */ 477 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); 478 479 list_add(&rdev->list, &cfg80211_rdev_list); 480 cfg80211_rdev_list_generation++; 481 482 mutex_unlock(&cfg80211_mutex); 483 484 /* add to debugfs */ 485 rdev->wiphy.debugfsdir = 486 debugfs_create_dir(wiphy_name(&rdev->wiphy), 487 ieee80211_debugfs_dir); 488 if (IS_ERR(rdev->wiphy.debugfsdir)) 489 rdev->wiphy.debugfsdir = NULL; 490 491 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { 492 struct regulatory_request request; 493 494 request.wiphy_idx = get_wiphy_idx(wiphy); 495 request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 496 request.alpha2[0] = '9'; 497 request.alpha2[1] = '9'; 498 499 nl80211_send_reg_change_event(&request); 500 } 501 502 cfg80211_debugfs_rdev_add(rdev); 503 504 return 0; 505 506 out_rm_dev: 507 device_del(&rdev->wiphy.dev); 508 return res; 509 } 510 EXPORT_SYMBOL(wiphy_register); 511 512 void wiphy_rfkill_start_polling(struct wiphy *wiphy) 513 { 514 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 515 516 if (!rdev->ops->rfkill_poll) 517 return; 518 rdev->rfkill_ops.poll = cfg80211_rfkill_poll; 519 rfkill_resume_polling(rdev->rfkill); 520 } 521 EXPORT_SYMBOL(wiphy_rfkill_start_polling); 522 523 void wiphy_rfkill_stop_polling(struct wiphy *wiphy) 524 { 525 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 526 527 rfkill_pause_polling(rdev->rfkill); 528 } 529 EXPORT_SYMBOL(wiphy_rfkill_stop_polling); 530 531 void wiphy_unregister(struct wiphy *wiphy) 532 { 533 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 534 535 rfkill_unregister(rdev->rfkill); 536 537 /* protect the device list */ 538 mutex_lock(&cfg80211_mutex); 539 540 wait_event(rdev->dev_wait, ({ 541 int __count; 542 mutex_lock(&rdev->devlist_mtx); 543 __count = rdev->opencount; 544 mutex_unlock(&rdev->devlist_mtx); 545 __count == 0;})); 546 547 mutex_lock(&rdev->devlist_mtx); 548 BUG_ON(!list_empty(&rdev->netdev_list)); 549 mutex_unlock(&rdev->devlist_mtx); 550 551 /* 552 * First remove the hardware from everywhere, this makes 553 * it impossible to find from userspace. 554 */ 555 debugfs_remove_recursive(rdev->wiphy.debugfsdir); 556 list_del(&rdev->list); 557 558 /* 559 * Try to grab rdev->mtx. If a command is still in progress, 560 * hopefully the driver will refuse it since it's tearing 561 * down the device already. We wait for this command to complete 562 * before unlinking the item from the list. 563 * Note: as codified by the BUG_ON above we cannot get here if 564 * a virtual interface is still present. Hence, we can only get 565 * to lock contention here if userspace issues a command that 566 * identified the hardware by wiphy index. 567 */ 568 cfg80211_lock_rdev(rdev); 569 /* nothing */ 570 cfg80211_unlock_rdev(rdev); 571 572 /* If this device got a regulatory hint tell core its 573 * free to listen now to a new shiny device regulatory hint */ 574 reg_device_remove(wiphy); 575 576 cfg80211_rdev_list_generation++; 577 device_del(&rdev->wiphy.dev); 578 579 mutex_unlock(&cfg80211_mutex); 580 581 flush_work(&rdev->scan_done_wk); 582 cancel_work_sync(&rdev->conn_work); 583 flush_work(&rdev->event_work); 584 } 585 EXPORT_SYMBOL(wiphy_unregister); 586 587 void cfg80211_dev_free(struct cfg80211_registered_device *rdev) 588 { 589 struct cfg80211_internal_bss *scan, *tmp; 590 rfkill_destroy(rdev->rfkill); 591 mutex_destroy(&rdev->mtx); 592 mutex_destroy(&rdev->devlist_mtx); 593 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) 594 cfg80211_put_bss(&scan->pub); 595 kfree(rdev); 596 } 597 598 void wiphy_free(struct wiphy *wiphy) 599 { 600 put_device(&wiphy->dev); 601 } 602 EXPORT_SYMBOL(wiphy_free); 603 604 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) 605 { 606 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 607 608 if (rfkill_set_hw_state(rdev->rfkill, blocked)) 609 schedule_work(&rdev->rfkill_sync); 610 } 611 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); 612 613 static void wdev_cleanup_work(struct work_struct *work) 614 { 615 struct wireless_dev *wdev; 616 struct cfg80211_registered_device *rdev; 617 618 wdev = container_of(work, struct wireless_dev, cleanup_work); 619 rdev = wiphy_to_dev(wdev->wiphy); 620 621 cfg80211_lock_rdev(rdev); 622 623 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { 624 rdev->scan_req->aborted = true; 625 ___cfg80211_scan_done(rdev, true); 626 } 627 628 cfg80211_unlock_rdev(rdev); 629 630 mutex_lock(&rdev->devlist_mtx); 631 rdev->opencount--; 632 mutex_unlock(&rdev->devlist_mtx); 633 wake_up(&rdev->dev_wait); 634 635 dev_put(wdev->netdev); 636 } 637 638 static struct device_type wiphy_type = { 639 .name = "wlan", 640 }; 641 642 static int cfg80211_netdev_notifier_call(struct notifier_block * nb, 643 unsigned long state, 644 void *ndev) 645 { 646 struct net_device *dev = ndev; 647 struct wireless_dev *wdev = dev->ieee80211_ptr; 648 struct cfg80211_registered_device *rdev; 649 650 if (!wdev) 651 return NOTIFY_DONE; 652 653 rdev = wiphy_to_dev(wdev->wiphy); 654 655 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); 656 657 switch (state) { 658 case NETDEV_POST_INIT: 659 SET_NETDEV_DEVTYPE(dev, &wiphy_type); 660 break; 661 case NETDEV_REGISTER: 662 /* 663 * NB: cannot take rdev->mtx here because this may be 664 * called within code protected by it when interfaces 665 * are added with nl80211. 666 */ 667 mutex_init(&wdev->mtx); 668 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); 669 INIT_LIST_HEAD(&wdev->event_list); 670 spin_lock_init(&wdev->event_lock); 671 mutex_lock(&rdev->devlist_mtx); 672 list_add(&wdev->list, &rdev->netdev_list); 673 rdev->devlist_generation++; 674 /* can only change netns with wiphy */ 675 dev->features |= NETIF_F_NETNS_LOCAL; 676 677 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, 678 "phy80211")) { 679 printk(KERN_ERR "wireless: failed to add phy80211 " 680 "symlink to netdev!\n"); 681 } 682 wdev->netdev = dev; 683 wdev->sme_state = CFG80211_SME_IDLE; 684 mutex_unlock(&rdev->devlist_mtx); 685 #ifdef CONFIG_CFG80211_WEXT 686 wdev->wext.default_key = -1; 687 wdev->wext.default_mgmt_key = -1; 688 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 689 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) 690 wdev->wext.ps = true; 691 else 692 wdev->wext.ps = false; 693 wdev->wext.ps_timeout = 100; 694 if (rdev->ops->set_power_mgmt) 695 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, 696 wdev->wext.ps, 697 wdev->wext.ps_timeout)) { 698 /* assume this means it's off */ 699 wdev->wext.ps = false; 700 } 701 #endif 702 if (!dev->ethtool_ops) 703 dev->ethtool_ops = &cfg80211_ethtool_ops; 704 705 if ((wdev->iftype == NL80211_IFTYPE_STATION || 706 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) 707 dev->priv_flags |= IFF_DONT_BRIDGE; 708 break; 709 case NETDEV_GOING_DOWN: 710 switch (wdev->iftype) { 711 case NL80211_IFTYPE_ADHOC: 712 cfg80211_leave_ibss(rdev, dev, true); 713 break; 714 case NL80211_IFTYPE_STATION: 715 wdev_lock(wdev); 716 #ifdef CONFIG_CFG80211_WEXT 717 kfree(wdev->wext.ie); 718 wdev->wext.ie = NULL; 719 wdev->wext.ie_len = 0; 720 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 721 #endif 722 __cfg80211_disconnect(rdev, dev, 723 WLAN_REASON_DEAUTH_LEAVING, true); 724 cfg80211_mlme_down(rdev, dev); 725 wdev_unlock(wdev); 726 break; 727 default: 728 break; 729 } 730 break; 731 case NETDEV_DOWN: 732 dev_hold(dev); 733 queue_work(cfg80211_wq, &wdev->cleanup_work); 734 break; 735 case NETDEV_UP: 736 /* 737 * If we have a really quick DOWN/UP succession we may 738 * have this work still pending ... cancel it and see 739 * if it was pending, in which case we need to account 740 * for some of the work it would have done. 741 */ 742 if (cancel_work_sync(&wdev->cleanup_work)) { 743 mutex_lock(&rdev->devlist_mtx); 744 rdev->opencount--; 745 mutex_unlock(&rdev->devlist_mtx); 746 dev_put(dev); 747 } 748 cfg80211_lock_rdev(rdev); 749 mutex_lock(&rdev->devlist_mtx); 750 #ifdef CONFIG_CFG80211_WEXT 751 wdev_lock(wdev); 752 switch (wdev->iftype) { 753 case NL80211_IFTYPE_ADHOC: 754 cfg80211_ibss_wext_join(rdev, wdev); 755 break; 756 case NL80211_IFTYPE_STATION: 757 cfg80211_mgd_wext_connect(rdev, wdev); 758 break; 759 default: 760 break; 761 } 762 wdev_unlock(wdev); 763 #endif 764 rdev->opencount++; 765 mutex_unlock(&rdev->devlist_mtx); 766 cfg80211_unlock_rdev(rdev); 767 break; 768 case NETDEV_UNREGISTER: 769 /* 770 * NB: cannot take rdev->mtx here because this may be 771 * called within code protected by it when interfaces 772 * are removed with nl80211. 773 */ 774 mutex_lock(&rdev->devlist_mtx); 775 /* 776 * It is possible to get NETDEV_UNREGISTER 777 * multiple times. To detect that, check 778 * that the interface is still on the list 779 * of registered interfaces, and only then 780 * remove and clean it up. 781 */ 782 if (!list_empty(&wdev->list)) { 783 sysfs_remove_link(&dev->dev.kobj, "phy80211"); 784 list_del_init(&wdev->list); 785 rdev->devlist_generation++; 786 #ifdef CONFIG_CFG80211_WEXT 787 kfree(wdev->wext.keys); 788 #endif 789 } 790 mutex_unlock(&rdev->devlist_mtx); 791 break; 792 case NETDEV_PRE_UP: 793 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) 794 return notifier_from_errno(-EOPNOTSUPP); 795 if (rfkill_blocked(rdev->rfkill)) 796 return notifier_from_errno(-ERFKILL); 797 break; 798 } 799 800 return NOTIFY_DONE; 801 } 802 803 static struct notifier_block cfg80211_netdev_notifier = { 804 .notifier_call = cfg80211_netdev_notifier_call, 805 }; 806 807 static void __net_exit cfg80211_pernet_exit(struct net *net) 808 { 809 struct cfg80211_registered_device *rdev; 810 811 rtnl_lock(); 812 mutex_lock(&cfg80211_mutex); 813 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 814 if (net_eq(wiphy_net(&rdev->wiphy), net)) 815 WARN_ON(cfg80211_switch_netns(rdev, &init_net)); 816 } 817 mutex_unlock(&cfg80211_mutex); 818 rtnl_unlock(); 819 } 820 821 static struct pernet_operations cfg80211_pernet_ops = { 822 .exit = cfg80211_pernet_exit, 823 }; 824 825 static int __init cfg80211_init(void) 826 { 827 int err; 828 829 err = register_pernet_device(&cfg80211_pernet_ops); 830 if (err) 831 goto out_fail_pernet; 832 833 err = wiphy_sysfs_init(); 834 if (err) 835 goto out_fail_sysfs; 836 837 err = register_netdevice_notifier(&cfg80211_netdev_notifier); 838 if (err) 839 goto out_fail_notifier; 840 841 err = nl80211_init(); 842 if (err) 843 goto out_fail_nl80211; 844 845 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); 846 847 err = regulatory_init(); 848 if (err) 849 goto out_fail_reg; 850 851 cfg80211_wq = create_singlethread_workqueue("cfg80211"); 852 if (!cfg80211_wq) 853 goto out_fail_wq; 854 855 return 0; 856 857 out_fail_wq: 858 regulatory_exit(); 859 out_fail_reg: 860 debugfs_remove(ieee80211_debugfs_dir); 861 out_fail_nl80211: 862 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 863 out_fail_notifier: 864 wiphy_sysfs_exit(); 865 out_fail_sysfs: 866 unregister_pernet_device(&cfg80211_pernet_ops); 867 out_fail_pernet: 868 return err; 869 } 870 subsys_initcall(cfg80211_init); 871 872 static void cfg80211_exit(void) 873 { 874 debugfs_remove(ieee80211_debugfs_dir); 875 nl80211_exit(); 876 unregister_netdevice_notifier(&cfg80211_netdev_notifier); 877 wiphy_sysfs_exit(); 878 regulatory_exit(); 879 unregister_pernet_device(&cfg80211_pernet_ops); 880 destroy_workqueue(cfg80211_wq); 881 } 882 module_exit(cfg80211_exit); 883