1 /* 2 * Interface handling (except master interface) 3 * 4 * Copyright 2002-2005, Instant802 Networks, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc. 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 46 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) 47 { 48 int meshhdrlen; 49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 50 51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; 52 53 /* FIX: what would be proper limits for MTU? 54 * This interface uses 802.3 frames. */ 55 if (new_mtu < 256 || 56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { 57 return -EINVAL; 58 } 59 60 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); 62 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ 63 dev->mtu = new_mtu; 64 return 0; 65 } 66 67 static int ieee80211_change_mac(struct net_device *dev, void *addr) 68 { 69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 70 struct sockaddr *sa = addr; 71 int ret; 72 73 if (ieee80211_sdata_running(sdata)) 74 return -EBUSY; 75 76 ret = eth_mac_addr(dev, sa); 77 78 if (ret == 0) 79 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 80 81 return ret; 82 } 83 84 static inline int identical_mac_addr_allowed(int type1, int type2) 85 { 86 return type1 == NL80211_IFTYPE_MONITOR || 87 type2 == NL80211_IFTYPE_MONITOR || 88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 89 (type1 == NL80211_IFTYPE_WDS && 90 (type2 == NL80211_IFTYPE_WDS || 91 type2 == NL80211_IFTYPE_AP)) || 92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 93 (type1 == NL80211_IFTYPE_AP_VLAN && 94 (type2 == NL80211_IFTYPE_AP || 95 type2 == NL80211_IFTYPE_AP_VLAN)); 96 } 97 98 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 99 enum nl80211_iftype iftype) 100 { 101 struct ieee80211_local *local = sdata->local; 102 struct ieee80211_sub_if_data *nsdata; 103 struct net_device *dev = sdata->dev; 104 105 ASSERT_RTNL(); 106 107 /* we hold the RTNL here so can safely walk the list */ 108 list_for_each_entry(nsdata, &local->interfaces, list) { 109 struct net_device *ndev = nsdata->dev; 110 111 if (ndev != dev && ieee80211_sdata_running(nsdata)) { 112 /* 113 * Allow only a single IBSS interface to be up at any 114 * time. This is restricted because beacon distribution 115 * cannot work properly if both are in the same IBSS. 116 * 117 * To remove this restriction we'd have to disallow them 118 * from setting the same SSID on different IBSS interfaces 119 * belonging to the same hardware. Then, however, we're 120 * faced with having to adopt two different TSF timers... 121 */ 122 if (iftype == NL80211_IFTYPE_ADHOC && 123 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 124 return -EBUSY; 125 126 /* 127 * The remaining checks are only performed for interfaces 128 * with the same MAC address. 129 */ 130 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) 131 continue; 132 133 /* 134 * check whether it may have the same address 135 */ 136 if (!identical_mac_addr_allowed(iftype, 137 nsdata->vif.type)) 138 return -ENOTUNIQ; 139 140 /* 141 * can only add VLANs to enabled APs 142 */ 143 if (iftype == NL80211_IFTYPE_AP_VLAN && 144 nsdata->vif.type == NL80211_IFTYPE_AP) 145 sdata->bss = &nsdata->u.ap; 146 } 147 } 148 149 return 0; 150 } 151 152 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 153 const int offset) 154 { 155 struct ieee80211_local *local = sdata->local; 156 u32 flags = sdata->u.mntr_flags; 157 158 #define ADJUST(_f, _s) do { \ 159 if (flags & MONITOR_FLAG_##_f) \ 160 local->fif_##_s += offset; \ 161 } while (0) 162 163 ADJUST(FCSFAIL, fcsfail); 164 ADJUST(PLCPFAIL, plcpfail); 165 ADJUST(CONTROL, control); 166 ADJUST(CONTROL, pspoll); 167 ADJUST(OTHER_BSS, other_bss); 168 169 #undef ADJUST 170 } 171 172 /* 173 * NOTE: Be very careful when changing this function, it must NOT return 174 * an error on interface type changes that have been pre-checked, so most 175 * checks should be in ieee80211_check_concurrent_iface. 176 */ 177 static int ieee80211_do_open(struct net_device *dev, bool coming_up) 178 { 179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 180 struct ieee80211_local *local = sdata->local; 181 struct sta_info *sta; 182 u32 changed = 0; 183 int res; 184 u32 hw_reconf_flags = 0; 185 186 switch (sdata->vif.type) { 187 case NL80211_IFTYPE_WDS: 188 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 189 return -ENOLINK; 190 break; 191 case NL80211_IFTYPE_AP_VLAN: 192 if (!sdata->bss) 193 return -ENOLINK; 194 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 195 break; 196 case NL80211_IFTYPE_AP: 197 sdata->bss = &sdata->u.ap; 198 break; 199 case NL80211_IFTYPE_MESH_POINT: 200 case NL80211_IFTYPE_STATION: 201 case NL80211_IFTYPE_MONITOR: 202 case NL80211_IFTYPE_ADHOC: 203 /* no special treatment */ 204 break; 205 case NL80211_IFTYPE_UNSPECIFIED: 206 case NUM_NL80211_IFTYPES: 207 case NL80211_IFTYPE_P2P_CLIENT: 208 case NL80211_IFTYPE_P2P_GO: 209 /* cannot happen */ 210 WARN_ON(1); 211 break; 212 } 213 214 if (local->open_count == 0) { 215 res = drv_start(local); 216 if (res) 217 goto err_del_bss; 218 if (local->ops->napi_poll) 219 napi_enable(&local->napi); 220 /* we're brought up, everything changes */ 221 hw_reconf_flags = ~0; 222 ieee80211_led_radio(local, true); 223 ieee80211_mod_tpt_led_trig(local, 224 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 225 } 226 227 /* 228 * Copy the hopefully now-present MAC address to 229 * this interface, if it has the special null one. 230 */ 231 if (is_zero_ether_addr(dev->dev_addr)) { 232 memcpy(dev->dev_addr, 233 local->hw.wiphy->perm_addr, 234 ETH_ALEN); 235 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 236 237 if (!is_valid_ether_addr(dev->dev_addr)) { 238 if (!local->open_count) 239 drv_stop(local); 240 return -EADDRNOTAVAIL; 241 } 242 } 243 244 switch (sdata->vif.type) { 245 case NL80211_IFTYPE_AP_VLAN: 246 /* no need to tell driver */ 247 break; 248 case NL80211_IFTYPE_MONITOR: 249 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 250 local->cooked_mntrs++; 251 break; 252 } 253 254 /* must be before the call to ieee80211_configure_filter */ 255 local->monitors++; 256 if (local->monitors == 1) { 257 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 258 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 259 } 260 261 ieee80211_adjust_monitor_flags(sdata, 1); 262 ieee80211_configure_filter(local); 263 264 netif_carrier_on(dev); 265 break; 266 default: 267 if (coming_up) { 268 res = drv_add_interface(local, &sdata->vif); 269 if (res) 270 goto err_stop; 271 } 272 273 if (sdata->vif.type == NL80211_IFTYPE_AP) { 274 local->fif_pspoll++; 275 local->fif_probe_req++; 276 277 ieee80211_configure_filter(local); 278 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 279 local->fif_probe_req++; 280 } 281 282 changed |= ieee80211_reset_erp_info(sdata); 283 ieee80211_bss_info_change_notify(sdata, changed); 284 285 if (sdata->vif.type == NL80211_IFTYPE_STATION) 286 netif_carrier_off(dev); 287 else 288 netif_carrier_on(dev); 289 } 290 291 set_bit(SDATA_STATE_RUNNING, &sdata->state); 292 293 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 294 /* Create STA entry for the WDS peer */ 295 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 296 GFP_KERNEL); 297 if (!sta) { 298 res = -ENOMEM; 299 goto err_del_interface; 300 } 301 302 /* no locking required since STA is not live yet */ 303 sta->flags |= WLAN_STA_AUTHORIZED; 304 305 res = sta_info_insert(sta); 306 if (res) { 307 /* STA has been freed */ 308 goto err_del_interface; 309 } 310 311 rate_control_rate_init(sta); 312 } 313 314 /* 315 * set_multicast_list will be invoked by the networking core 316 * which will check whether any increments here were done in 317 * error and sync them down to the hardware as filter flags. 318 */ 319 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 320 atomic_inc(&local->iff_allmultis); 321 322 if (sdata->flags & IEEE80211_SDATA_PROMISC) 323 atomic_inc(&local->iff_promiscs); 324 325 mutex_lock(&local->mtx); 326 hw_reconf_flags |= __ieee80211_recalc_idle(local); 327 mutex_unlock(&local->mtx); 328 329 if (coming_up) 330 local->open_count++; 331 332 if (hw_reconf_flags) { 333 ieee80211_hw_config(local, hw_reconf_flags); 334 /* 335 * set default queue parameters so drivers don't 336 * need to initialise the hardware if the hardware 337 * doesn't start up with sane defaults 338 */ 339 ieee80211_set_wmm_default(sdata); 340 } 341 342 ieee80211_recalc_ps(local, -1); 343 344 netif_tx_start_all_queues(dev); 345 346 return 0; 347 err_del_interface: 348 drv_remove_interface(local, &sdata->vif); 349 err_stop: 350 if (!local->open_count) 351 drv_stop(local); 352 err_del_bss: 353 sdata->bss = NULL; 354 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 355 list_del(&sdata->u.vlan.list); 356 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 357 return res; 358 } 359 360 static int ieee80211_open(struct net_device *dev) 361 { 362 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 363 int err; 364 365 /* fail early if user set an invalid address */ 366 if (!is_zero_ether_addr(dev->dev_addr) && 367 !is_valid_ether_addr(dev->dev_addr)) 368 return -EADDRNOTAVAIL; 369 370 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 371 if (err) 372 return err; 373 374 return ieee80211_do_open(dev, true); 375 } 376 377 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 378 bool going_down) 379 { 380 struct ieee80211_local *local = sdata->local; 381 unsigned long flags; 382 struct sk_buff *skb, *tmp; 383 u32 hw_reconf_flags = 0; 384 int i; 385 enum nl80211_channel_type orig_ct; 386 387 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 388 389 if (local->scan_sdata == sdata) 390 ieee80211_scan_cancel(local); 391 392 /* 393 * Stop TX on this interface first. 394 */ 395 netif_tx_stop_all_queues(sdata->dev); 396 397 /* 398 * Purge work for this interface. 399 */ 400 ieee80211_work_purge(sdata); 401 402 /* 403 * Remove all stations associated with this interface. 404 * 405 * This must be done before calling ops->remove_interface() 406 * because otherwise we can later invoke ops->sta_notify() 407 * whenever the STAs are removed, and that invalidates driver 408 * assumptions about always getting a vif pointer that is valid 409 * (because if we remove a STA after ops->remove_interface() 410 * the driver will have removed the vif info already!) 411 * 412 * This is relevant only in AP, WDS and mesh modes, since in 413 * all other modes we've already removed all stations when 414 * disconnecting etc. 415 */ 416 sta_info_flush(local, sdata); 417 418 /* 419 * Don't count this interface for promisc/allmulti while it 420 * is down. dev_mc_unsync() will invoke set_multicast_list 421 * on the master interface which will sync these down to the 422 * hardware as filter flags. 423 */ 424 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 425 atomic_dec(&local->iff_allmultis); 426 427 if (sdata->flags & IEEE80211_SDATA_PROMISC) 428 atomic_dec(&local->iff_promiscs); 429 430 if (sdata->vif.type == NL80211_IFTYPE_AP) { 431 local->fif_pspoll--; 432 local->fif_probe_req--; 433 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 434 local->fif_probe_req--; 435 } 436 437 netif_addr_lock_bh(sdata->dev); 438 spin_lock_bh(&local->filter_lock); 439 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 440 sdata->dev->addr_len); 441 spin_unlock_bh(&local->filter_lock); 442 netif_addr_unlock_bh(sdata->dev); 443 444 ieee80211_configure_filter(local); 445 446 del_timer_sync(&local->dynamic_ps_timer); 447 cancel_work_sync(&local->dynamic_ps_enable_work); 448 449 /* APs need special treatment */ 450 if (sdata->vif.type == NL80211_IFTYPE_AP) { 451 struct ieee80211_sub_if_data *vlan, *tmpsdata; 452 struct beacon_data *old_beacon = 453 rtnl_dereference(sdata->u.ap.beacon); 454 455 /* sdata_running will return false, so this will disable */ 456 ieee80211_bss_info_change_notify(sdata, 457 BSS_CHANGED_BEACON_ENABLED); 458 459 /* remove beacon */ 460 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 461 synchronize_rcu(); 462 kfree(old_beacon); 463 464 /* free all potentially still buffered bcast frames */ 465 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { 466 local->total_ps_buffered--; 467 dev_kfree_skb(skb); 468 } 469 470 /* down all dependent devices, that is VLANs */ 471 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 472 u.vlan.list) 473 dev_close(vlan->dev); 474 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 475 } 476 477 if (going_down) 478 local->open_count--; 479 480 switch (sdata->vif.type) { 481 case NL80211_IFTYPE_AP_VLAN: 482 list_del(&sdata->u.vlan.list); 483 /* no need to tell driver */ 484 break; 485 case NL80211_IFTYPE_MONITOR: 486 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 487 local->cooked_mntrs--; 488 break; 489 } 490 491 local->monitors--; 492 if (local->monitors == 0) { 493 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 494 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 495 } 496 497 ieee80211_adjust_monitor_flags(sdata, -1); 498 ieee80211_configure_filter(local); 499 break; 500 default: 501 flush_work(&sdata->work); 502 /* 503 * When we get here, the interface is marked down. 504 * Call synchronize_rcu() to wait for the RX path 505 * should it be using the interface and enqueuing 506 * frames at this very time on another CPU. 507 */ 508 synchronize_rcu(); 509 skb_queue_purge(&sdata->skb_queue); 510 511 /* 512 * Disable beaconing here for mesh only, AP and IBSS 513 * are already taken care of. 514 */ 515 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 516 ieee80211_bss_info_change_notify(sdata, 517 BSS_CHANGED_BEACON_ENABLED); 518 519 /* 520 * Free all remaining keys, there shouldn't be any, 521 * except maybe group keys in AP more or WDS? 522 */ 523 ieee80211_free_keys(sdata); 524 525 if (going_down) 526 drv_remove_interface(local, &sdata->vif); 527 } 528 529 sdata->bss = NULL; 530 531 mutex_lock(&local->mtx); 532 hw_reconf_flags |= __ieee80211_recalc_idle(local); 533 mutex_unlock(&local->mtx); 534 535 ieee80211_recalc_ps(local, -1); 536 537 if (local->open_count == 0) { 538 if (local->ops->napi_poll) 539 napi_disable(&local->napi); 540 ieee80211_clear_tx_pending(local); 541 ieee80211_stop_device(local); 542 543 /* no reconfiguring after stop! */ 544 hw_reconf_flags = 0; 545 } 546 547 /* Re-calculate channel-type, in case there are multiple vifs 548 * on different channel types. 549 */ 550 orig_ct = local->_oper_channel_type; 551 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 552 553 /* do after stop to avoid reconfiguring when we stop anyway */ 554 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 555 ieee80211_hw_config(local, hw_reconf_flags); 556 557 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 558 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 559 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 560 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 561 if (info->control.vif == &sdata->vif) { 562 __skb_unlink(skb, &local->pending[i]); 563 dev_kfree_skb_irq(skb); 564 } 565 } 566 } 567 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 568 } 569 570 static int ieee80211_stop(struct net_device *dev) 571 { 572 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 573 574 ieee80211_do_stop(sdata, true); 575 576 return 0; 577 } 578 579 static void ieee80211_set_multicast_list(struct net_device *dev) 580 { 581 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 582 struct ieee80211_local *local = sdata->local; 583 int allmulti, promisc, sdata_allmulti, sdata_promisc; 584 585 allmulti = !!(dev->flags & IFF_ALLMULTI); 586 promisc = !!(dev->flags & IFF_PROMISC); 587 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 588 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 589 590 if (allmulti != sdata_allmulti) { 591 if (dev->flags & IFF_ALLMULTI) 592 atomic_inc(&local->iff_allmultis); 593 else 594 atomic_dec(&local->iff_allmultis); 595 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 596 } 597 598 if (promisc != sdata_promisc) { 599 if (dev->flags & IFF_PROMISC) 600 atomic_inc(&local->iff_promiscs); 601 else 602 atomic_dec(&local->iff_promiscs); 603 sdata->flags ^= IEEE80211_SDATA_PROMISC; 604 } 605 spin_lock_bh(&local->filter_lock); 606 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 607 spin_unlock_bh(&local->filter_lock); 608 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 609 } 610 611 /* 612 * Called when the netdev is removed or, by the code below, before 613 * the interface type changes. 614 */ 615 static void ieee80211_teardown_sdata(struct net_device *dev) 616 { 617 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 618 struct ieee80211_local *local = sdata->local; 619 int flushed; 620 int i; 621 622 /* free extra data */ 623 ieee80211_free_keys(sdata); 624 625 ieee80211_debugfs_remove_netdev(sdata); 626 627 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 628 __skb_queue_purge(&sdata->fragments[i].skb_list); 629 sdata->fragment_next = 0; 630 631 if (ieee80211_vif_is_mesh(&sdata->vif)) 632 mesh_rmc_free(sdata); 633 634 flushed = sta_info_flush(local, sdata); 635 WARN_ON(flushed); 636 } 637 638 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 639 struct sk_buff *skb) 640 { 641 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 642 } 643 644 static const struct net_device_ops ieee80211_dataif_ops = { 645 .ndo_open = ieee80211_open, 646 .ndo_stop = ieee80211_stop, 647 .ndo_uninit = ieee80211_teardown_sdata, 648 .ndo_start_xmit = ieee80211_subif_start_xmit, 649 .ndo_set_multicast_list = ieee80211_set_multicast_list, 650 .ndo_change_mtu = ieee80211_change_mtu, 651 .ndo_set_mac_address = ieee80211_change_mac, 652 .ndo_select_queue = ieee80211_netdev_select_queue, 653 }; 654 655 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 656 struct sk_buff *skb) 657 { 658 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 659 struct ieee80211_local *local = sdata->local; 660 struct ieee80211_hdr *hdr; 661 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 662 u8 *p; 663 664 if (local->hw.queues < 4) 665 return 0; 666 667 if (skb->len < 4 || 668 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 669 return 0; /* doesn't matter, frame will be dropped */ 670 671 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 672 673 if (!ieee80211_is_data(hdr->frame_control)) { 674 skb->priority = 7; 675 return ieee802_1d_to_ac[skb->priority]; 676 } 677 if (!ieee80211_is_data_qos(hdr->frame_control)) { 678 skb->priority = 0; 679 return ieee802_1d_to_ac[skb->priority]; 680 } 681 682 p = ieee80211_get_qos_ctl(hdr); 683 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; 684 685 return ieee80211_downgrade_queue(local, skb); 686 } 687 688 static const struct net_device_ops ieee80211_monitorif_ops = { 689 .ndo_open = ieee80211_open, 690 .ndo_stop = ieee80211_stop, 691 .ndo_uninit = ieee80211_teardown_sdata, 692 .ndo_start_xmit = ieee80211_monitor_start_xmit, 693 .ndo_set_multicast_list = ieee80211_set_multicast_list, 694 .ndo_change_mtu = ieee80211_change_mtu, 695 .ndo_set_mac_address = eth_mac_addr, 696 .ndo_select_queue = ieee80211_monitor_select_queue, 697 }; 698 699 static void ieee80211_if_setup(struct net_device *dev) 700 { 701 ether_setup(dev); 702 dev->netdev_ops = &ieee80211_dataif_ops; 703 dev->destructor = free_netdev; 704 } 705 706 static void ieee80211_iface_work(struct work_struct *work) 707 { 708 struct ieee80211_sub_if_data *sdata = 709 container_of(work, struct ieee80211_sub_if_data, work); 710 struct ieee80211_local *local = sdata->local; 711 struct sk_buff *skb; 712 struct sta_info *sta; 713 struct ieee80211_ra_tid *ra_tid; 714 715 if (!ieee80211_sdata_running(sdata)) 716 return; 717 718 if (local->scanning) 719 return; 720 721 /* 722 * ieee80211_queue_work() should have picked up most cases, 723 * here we'll pick the rest. 724 */ 725 if (WARN(local->suspended, 726 "interface work scheduled while going to suspend\n")) 727 return; 728 729 /* first process frames */ 730 while ((skb = skb_dequeue(&sdata->skb_queue))) { 731 struct ieee80211_mgmt *mgmt = (void *)skb->data; 732 733 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 734 ra_tid = (void *)&skb->cb; 735 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 736 ra_tid->tid); 737 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 738 ra_tid = (void *)&skb->cb; 739 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 740 ra_tid->tid); 741 } else if (ieee80211_is_action(mgmt->frame_control) && 742 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 743 int len = skb->len; 744 745 mutex_lock(&local->sta_mtx); 746 sta = sta_info_get_bss(sdata, mgmt->sa); 747 if (sta) { 748 switch (mgmt->u.action.u.addba_req.action_code) { 749 case WLAN_ACTION_ADDBA_REQ: 750 ieee80211_process_addba_request( 751 local, sta, mgmt, len); 752 break; 753 case WLAN_ACTION_ADDBA_RESP: 754 ieee80211_process_addba_resp(local, sta, 755 mgmt, len); 756 break; 757 case WLAN_ACTION_DELBA: 758 ieee80211_process_delba(sdata, sta, 759 mgmt, len); 760 break; 761 default: 762 WARN_ON(1); 763 break; 764 } 765 } 766 mutex_unlock(&local->sta_mtx); 767 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 768 struct ieee80211_hdr *hdr = (void *)mgmt; 769 /* 770 * So the frame isn't mgmt, but frame_control 771 * is at the right place anyway, of course, so 772 * the if statement is correct. 773 * 774 * Warn if we have other data frame types here, 775 * they must not get here. 776 */ 777 WARN_ON(hdr->frame_control & 778 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 779 WARN_ON(!(hdr->seq_ctrl & 780 cpu_to_le16(IEEE80211_SCTL_FRAG))); 781 /* 782 * This was a fragment of a frame, received while 783 * a block-ack session was active. That cannot be 784 * right, so terminate the session. 785 */ 786 mutex_lock(&local->sta_mtx); 787 sta = sta_info_get_bss(sdata, mgmt->sa); 788 if (sta) { 789 u16 tid = *ieee80211_get_qos_ctl(hdr) & 790 IEEE80211_QOS_CTL_TID_MASK; 791 792 __ieee80211_stop_rx_ba_session( 793 sta, tid, WLAN_BACK_RECIPIENT, 794 WLAN_REASON_QSTA_REQUIRE_SETUP, 795 true); 796 } 797 mutex_unlock(&local->sta_mtx); 798 } else switch (sdata->vif.type) { 799 case NL80211_IFTYPE_STATION: 800 ieee80211_sta_rx_queued_mgmt(sdata, skb); 801 break; 802 case NL80211_IFTYPE_ADHOC: 803 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 804 break; 805 case NL80211_IFTYPE_MESH_POINT: 806 if (!ieee80211_vif_is_mesh(&sdata->vif)) 807 break; 808 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 809 break; 810 default: 811 WARN(1, "frame for unexpected interface type"); 812 break; 813 } 814 815 kfree_skb(skb); 816 } 817 818 /* then other type-dependent work */ 819 switch (sdata->vif.type) { 820 case NL80211_IFTYPE_STATION: 821 ieee80211_sta_work(sdata); 822 break; 823 case NL80211_IFTYPE_ADHOC: 824 ieee80211_ibss_work(sdata); 825 break; 826 case NL80211_IFTYPE_MESH_POINT: 827 if (!ieee80211_vif_is_mesh(&sdata->vif)) 828 break; 829 ieee80211_mesh_work(sdata); 830 break; 831 default: 832 break; 833 } 834 } 835 836 837 /* 838 * Helper function to initialise an interface to a specific type. 839 */ 840 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 841 enum nl80211_iftype type) 842 { 843 /* clear type-dependent union */ 844 memset(&sdata->u, 0, sizeof(sdata->u)); 845 846 /* and set some type-dependent values */ 847 sdata->vif.type = type; 848 sdata->vif.p2p = false; 849 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 850 sdata->wdev.iftype = type; 851 852 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 853 sdata->control_port_no_encrypt = false; 854 855 /* only monitor differs */ 856 sdata->dev->type = ARPHRD_ETHER; 857 858 skb_queue_head_init(&sdata->skb_queue); 859 INIT_WORK(&sdata->work, ieee80211_iface_work); 860 861 switch (type) { 862 case NL80211_IFTYPE_P2P_GO: 863 type = NL80211_IFTYPE_AP; 864 sdata->vif.type = type; 865 sdata->vif.p2p = true; 866 /* fall through */ 867 case NL80211_IFTYPE_AP: 868 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 869 INIT_LIST_HEAD(&sdata->u.ap.vlans); 870 break; 871 case NL80211_IFTYPE_P2P_CLIENT: 872 type = NL80211_IFTYPE_STATION; 873 sdata->vif.type = type; 874 sdata->vif.p2p = true; 875 /* fall through */ 876 case NL80211_IFTYPE_STATION: 877 ieee80211_sta_setup_sdata(sdata); 878 break; 879 case NL80211_IFTYPE_ADHOC: 880 ieee80211_ibss_setup_sdata(sdata); 881 break; 882 case NL80211_IFTYPE_MESH_POINT: 883 if (ieee80211_vif_is_mesh(&sdata->vif)) 884 ieee80211_mesh_init_sdata(sdata); 885 break; 886 case NL80211_IFTYPE_MONITOR: 887 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 888 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 889 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 890 MONITOR_FLAG_OTHER_BSS; 891 break; 892 case NL80211_IFTYPE_WDS: 893 case NL80211_IFTYPE_AP_VLAN: 894 break; 895 case NL80211_IFTYPE_UNSPECIFIED: 896 case NUM_NL80211_IFTYPES: 897 BUG(); 898 break; 899 } 900 901 ieee80211_debugfs_add_netdev(sdata); 902 } 903 904 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 905 enum nl80211_iftype type) 906 { 907 struct ieee80211_local *local = sdata->local; 908 int ret, err; 909 enum nl80211_iftype internal_type = type; 910 bool p2p = false; 911 912 ASSERT_RTNL(); 913 914 if (!local->ops->change_interface) 915 return -EBUSY; 916 917 switch (sdata->vif.type) { 918 case NL80211_IFTYPE_AP: 919 case NL80211_IFTYPE_STATION: 920 case NL80211_IFTYPE_ADHOC: 921 /* 922 * Could maybe also all others here? 923 * Just not sure how that interacts 924 * with the RX/config path e.g. for 925 * mesh. 926 */ 927 break; 928 default: 929 return -EBUSY; 930 } 931 932 switch (type) { 933 case NL80211_IFTYPE_AP: 934 case NL80211_IFTYPE_STATION: 935 case NL80211_IFTYPE_ADHOC: 936 /* 937 * Could probably support everything 938 * but WDS here (WDS do_open can fail 939 * under memory pressure, which this 940 * code isn't prepared to handle). 941 */ 942 break; 943 case NL80211_IFTYPE_P2P_CLIENT: 944 p2p = true; 945 internal_type = NL80211_IFTYPE_STATION; 946 break; 947 case NL80211_IFTYPE_P2P_GO: 948 p2p = true; 949 internal_type = NL80211_IFTYPE_AP; 950 break; 951 default: 952 return -EBUSY; 953 } 954 955 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 956 if (ret) 957 return ret; 958 959 ieee80211_do_stop(sdata, false); 960 961 ieee80211_teardown_sdata(sdata->dev); 962 963 ret = drv_change_interface(local, sdata, internal_type, p2p); 964 if (ret) 965 type = sdata->vif.type; 966 967 ieee80211_setup_sdata(sdata, type); 968 969 err = ieee80211_do_open(sdata->dev, false); 970 WARN(err, "type change: do_open returned %d", err); 971 972 return ret; 973 } 974 975 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 976 enum nl80211_iftype type) 977 { 978 int ret; 979 980 ASSERT_RTNL(); 981 982 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 983 return 0; 984 985 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 986 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 987 type == NL80211_IFTYPE_ADHOC) 988 return -EOPNOTSUPP; 989 990 if (ieee80211_sdata_running(sdata)) { 991 ret = ieee80211_runtime_change_iftype(sdata, type); 992 if (ret) 993 return ret; 994 } else { 995 /* Purge and reset type-dependent state. */ 996 ieee80211_teardown_sdata(sdata->dev); 997 ieee80211_setup_sdata(sdata, type); 998 } 999 1000 /* reset some values that shouldn't be kept across type changes */ 1001 sdata->vif.bss_conf.basic_rates = 1002 ieee80211_mandatory_rates(sdata->local, 1003 sdata->local->hw.conf.channel->band); 1004 sdata->drop_unencrypted = 0; 1005 if (type == NL80211_IFTYPE_STATION) 1006 sdata->u.mgd.use_4addr = false; 1007 1008 return 0; 1009 } 1010 1011 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1012 struct net_device *dev, 1013 enum nl80211_iftype type) 1014 { 1015 struct ieee80211_sub_if_data *sdata; 1016 u64 mask, start, addr, val, inc; 1017 u8 *m; 1018 u8 tmp_addr[ETH_ALEN]; 1019 int i; 1020 1021 /* default ... something at least */ 1022 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1023 1024 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1025 local->hw.wiphy->n_addresses <= 1) 1026 return; 1027 1028 1029 mutex_lock(&local->iflist_mtx); 1030 1031 switch (type) { 1032 case NL80211_IFTYPE_MONITOR: 1033 /* doesn't matter */ 1034 break; 1035 case NL80211_IFTYPE_WDS: 1036 case NL80211_IFTYPE_AP_VLAN: 1037 /* match up with an AP interface */ 1038 list_for_each_entry(sdata, &local->interfaces, list) { 1039 if (sdata->vif.type != NL80211_IFTYPE_AP) 1040 continue; 1041 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1042 break; 1043 } 1044 /* keep default if no AP interface present */ 1045 break; 1046 default: 1047 /* assign a new address if possible -- try n_addresses first */ 1048 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1049 bool used = false; 1050 1051 list_for_each_entry(sdata, &local->interfaces, list) { 1052 if (memcmp(local->hw.wiphy->addresses[i].addr, 1053 sdata->vif.addr, ETH_ALEN) == 0) { 1054 used = true; 1055 break; 1056 } 1057 } 1058 1059 if (!used) { 1060 memcpy(dev->perm_addr, 1061 local->hw.wiphy->addresses[i].addr, 1062 ETH_ALEN); 1063 break; 1064 } 1065 } 1066 1067 /* try mask if available */ 1068 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1069 break; 1070 1071 m = local->hw.wiphy->addr_mask; 1072 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1073 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1074 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1075 1076 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1077 /* not a contiguous mask ... not handled now! */ 1078 printk(KERN_DEBUG "not contiguous\n"); 1079 break; 1080 } 1081 1082 m = local->hw.wiphy->perm_addr; 1083 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1084 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1085 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1086 1087 inc = 1ULL<<__ffs64(mask); 1088 val = (start & mask); 1089 addr = (start & ~mask) | (val & mask); 1090 do { 1091 bool used = false; 1092 1093 tmp_addr[5] = addr >> 0*8; 1094 tmp_addr[4] = addr >> 1*8; 1095 tmp_addr[3] = addr >> 2*8; 1096 tmp_addr[2] = addr >> 3*8; 1097 tmp_addr[1] = addr >> 4*8; 1098 tmp_addr[0] = addr >> 5*8; 1099 1100 val += inc; 1101 1102 list_for_each_entry(sdata, &local->interfaces, list) { 1103 if (memcmp(tmp_addr, sdata->vif.addr, 1104 ETH_ALEN) == 0) { 1105 used = true; 1106 break; 1107 } 1108 } 1109 1110 if (!used) { 1111 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1112 break; 1113 } 1114 addr = (start & ~mask) | (val & mask); 1115 } while (addr != start); 1116 1117 break; 1118 } 1119 1120 mutex_unlock(&local->iflist_mtx); 1121 } 1122 1123 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1124 struct net_device **new_dev, enum nl80211_iftype type, 1125 struct vif_params *params) 1126 { 1127 struct net_device *ndev; 1128 struct ieee80211_sub_if_data *sdata = NULL; 1129 int ret, i; 1130 1131 ASSERT_RTNL(); 1132 1133 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, 1134 name, ieee80211_if_setup, local->hw.queues); 1135 if (!ndev) 1136 return -ENOMEM; 1137 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1138 1139 ndev->needed_headroom = local->tx_headroom + 1140 4*6 /* four MAC addresses */ 1141 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1142 + 6 /* mesh */ 1143 + 8 /* rfc1042/bridge tunnel */ 1144 - ETH_HLEN /* ethernet hard_header_len */ 1145 + IEEE80211_ENCRYPT_HEADROOM; 1146 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1147 1148 ieee80211_assign_perm_addr(local, ndev, type); 1149 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1150 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1151 1152 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1153 sdata = netdev_priv(ndev); 1154 ndev->ieee80211_ptr = &sdata->wdev; 1155 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1156 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1157 1158 /* initialise type-independent data */ 1159 sdata->wdev.wiphy = local->hw.wiphy; 1160 sdata->local = local; 1161 sdata->dev = ndev; 1162 #ifdef CONFIG_INET 1163 sdata->arp_filter_state = true; 1164 #endif 1165 1166 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1167 skb_queue_head_init(&sdata->fragments[i].skb_list); 1168 1169 INIT_LIST_HEAD(&sdata->key_list); 1170 1171 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1172 struct ieee80211_supported_band *sband; 1173 sband = local->hw.wiphy->bands[i]; 1174 sdata->rc_rateidx_mask[i] = 1175 sband ? (1 << sband->n_bitrates) - 1 : 0; 1176 } 1177 1178 /* setup type-dependent data */ 1179 ieee80211_setup_sdata(sdata, type); 1180 1181 if (params) { 1182 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1183 if (type == NL80211_IFTYPE_STATION) 1184 sdata->u.mgd.use_4addr = params->use_4addr; 1185 } 1186 1187 ret = register_netdevice(ndev); 1188 if (ret) 1189 goto fail; 1190 1191 mutex_lock(&local->iflist_mtx); 1192 list_add_tail_rcu(&sdata->list, &local->interfaces); 1193 mutex_unlock(&local->iflist_mtx); 1194 1195 if (new_dev) 1196 *new_dev = ndev; 1197 1198 return 0; 1199 1200 fail: 1201 free_netdev(ndev); 1202 return ret; 1203 } 1204 1205 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1206 { 1207 ASSERT_RTNL(); 1208 1209 mutex_lock(&sdata->local->iflist_mtx); 1210 list_del_rcu(&sdata->list); 1211 mutex_unlock(&sdata->local->iflist_mtx); 1212 1213 synchronize_rcu(); 1214 unregister_netdevice(sdata->dev); 1215 } 1216 1217 /* 1218 * Remove all interfaces, may only be called at hardware unregistration 1219 * time because it doesn't do RCU-safe list removals. 1220 */ 1221 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1222 { 1223 struct ieee80211_sub_if_data *sdata, *tmp; 1224 LIST_HEAD(unreg_list); 1225 1226 ASSERT_RTNL(); 1227 1228 mutex_lock(&local->iflist_mtx); 1229 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1230 list_del(&sdata->list); 1231 1232 unregister_netdevice_queue(sdata->dev, &unreg_list); 1233 } 1234 mutex_unlock(&local->iflist_mtx); 1235 unregister_netdevice_many(&unreg_list); 1236 list_del(&unreg_list); 1237 } 1238 1239 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1240 const char *reason) 1241 { 1242 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1243 return 0; 1244 1245 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1246 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1247 #endif 1248 1249 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1250 return IEEE80211_CONF_CHANGE_IDLE; 1251 } 1252 1253 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1254 { 1255 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1256 return 0; 1257 1258 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1259 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1260 #endif 1261 1262 drv_flush(local, false); 1263 1264 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1265 return IEEE80211_CONF_CHANGE_IDLE; 1266 } 1267 1268 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1269 { 1270 struct ieee80211_sub_if_data *sdata; 1271 int count = 0; 1272 bool working = false, scanning = false, hw_roc = false; 1273 struct ieee80211_work *wk; 1274 unsigned int led_trig_start = 0, led_trig_stop = 0; 1275 1276 #ifdef CONFIG_PROVE_LOCKING 1277 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1278 !lockdep_is_held(&local->iflist_mtx)); 1279 #endif 1280 lockdep_assert_held(&local->mtx); 1281 1282 list_for_each_entry(sdata, &local->interfaces, list) { 1283 if (!ieee80211_sdata_running(sdata)) { 1284 sdata->vif.bss_conf.idle = true; 1285 continue; 1286 } 1287 1288 sdata->old_idle = sdata->vif.bss_conf.idle; 1289 1290 /* do not count disabled managed interfaces */ 1291 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1292 !sdata->u.mgd.associated) { 1293 sdata->vif.bss_conf.idle = true; 1294 continue; 1295 } 1296 /* do not count unused IBSS interfaces */ 1297 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1298 !sdata->u.ibss.ssid_len) { 1299 sdata->vif.bss_conf.idle = true; 1300 continue; 1301 } 1302 /* count everything else */ 1303 count++; 1304 } 1305 1306 list_for_each_entry(wk, &local->work_list, list) { 1307 working = true; 1308 wk->sdata->vif.bss_conf.idle = false; 1309 } 1310 1311 if (local->scan_sdata) { 1312 scanning = true; 1313 local->scan_sdata->vif.bss_conf.idle = false; 1314 } 1315 1316 if (local->hw_roc_channel) 1317 hw_roc = true; 1318 1319 list_for_each_entry(sdata, &local->interfaces, list) { 1320 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1321 continue; 1322 if (!ieee80211_sdata_running(sdata)) 1323 continue; 1324 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1325 } 1326 1327 if (working || scanning || hw_roc) 1328 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1329 else 1330 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1331 1332 if (count) 1333 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1334 else 1335 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1336 1337 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1338 1339 if (hw_roc) 1340 return ieee80211_idle_off(local, "hw remain-on-channel"); 1341 if (working) 1342 return ieee80211_idle_off(local, "working"); 1343 if (scanning) 1344 return ieee80211_idle_off(local, "scanning"); 1345 if (!count) 1346 return ieee80211_idle_on(local); 1347 else 1348 return ieee80211_idle_off(local, "in use"); 1349 1350 return 0; 1351 } 1352 1353 void ieee80211_recalc_idle(struct ieee80211_local *local) 1354 { 1355 u32 chg; 1356 1357 mutex_lock(&local->iflist_mtx); 1358 chg = __ieee80211_recalc_idle(local); 1359 mutex_unlock(&local->iflist_mtx); 1360 if (chg) 1361 ieee80211_hw_config(local, chg); 1362 } 1363 1364 static int netdev_notify(struct notifier_block *nb, 1365 unsigned long state, 1366 void *ndev) 1367 { 1368 struct net_device *dev = ndev; 1369 struct ieee80211_sub_if_data *sdata; 1370 1371 if (state != NETDEV_CHANGENAME) 1372 return 0; 1373 1374 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1375 return 0; 1376 1377 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1378 return 0; 1379 1380 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1381 1382 memcpy(sdata->name, dev->name, IFNAMSIZ); 1383 1384 ieee80211_debugfs_rename_netdev(sdata); 1385 return 0; 1386 } 1387 1388 static struct notifier_block mac80211_netdev_notifier = { 1389 .notifier_call = netdev_notify, 1390 }; 1391 1392 int ieee80211_iface_init(void) 1393 { 1394 return register_netdevice_notifier(&mac80211_netdev_notifier); 1395 } 1396 1397 void ieee80211_iface_exit(void) 1398 { 1399 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1400 } 1401