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_valid_ether_addr(dev->dev_addr)) 367 return -EADDRNOTAVAIL; 368 369 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 370 if (err) 371 return err; 372 373 return ieee80211_do_open(dev, true); 374 } 375 376 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 377 bool going_down) 378 { 379 struct ieee80211_local *local = sdata->local; 380 unsigned long flags; 381 struct sk_buff *skb, *tmp; 382 u32 hw_reconf_flags = 0; 383 int i; 384 enum nl80211_channel_type orig_ct; 385 386 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 387 388 if (local->scan_sdata == sdata) 389 ieee80211_scan_cancel(local); 390 391 /* 392 * Stop TX on this interface first. 393 */ 394 netif_tx_stop_all_queues(sdata->dev); 395 396 /* 397 * Purge work for this interface. 398 */ 399 ieee80211_work_purge(sdata); 400 401 /* 402 * Remove all stations associated with this interface. 403 * 404 * This must be done before calling ops->remove_interface() 405 * because otherwise we can later invoke ops->sta_notify() 406 * whenever the STAs are removed, and that invalidates driver 407 * assumptions about always getting a vif pointer that is valid 408 * (because if we remove a STA after ops->remove_interface() 409 * the driver will have removed the vif info already!) 410 * 411 * This is relevant only in AP, WDS and mesh modes, since in 412 * all other modes we've already removed all stations when 413 * disconnecting etc. 414 */ 415 sta_info_flush(local, sdata); 416 417 /* 418 * Don't count this interface for promisc/allmulti while it 419 * is down. dev_mc_unsync() will invoke set_multicast_list 420 * on the master interface which will sync these down to the 421 * hardware as filter flags. 422 */ 423 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 424 atomic_dec(&local->iff_allmultis); 425 426 if (sdata->flags & IEEE80211_SDATA_PROMISC) 427 atomic_dec(&local->iff_promiscs); 428 429 if (sdata->vif.type == NL80211_IFTYPE_AP) { 430 local->fif_pspoll--; 431 local->fif_probe_req--; 432 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 433 local->fif_probe_req--; 434 } 435 436 netif_addr_lock_bh(sdata->dev); 437 spin_lock_bh(&local->filter_lock); 438 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 439 sdata->dev->addr_len); 440 spin_unlock_bh(&local->filter_lock); 441 netif_addr_unlock_bh(sdata->dev); 442 443 ieee80211_configure_filter(local); 444 445 del_timer_sync(&local->dynamic_ps_timer); 446 cancel_work_sync(&local->dynamic_ps_enable_work); 447 448 /* APs need special treatment */ 449 if (sdata->vif.type == NL80211_IFTYPE_AP) { 450 struct ieee80211_sub_if_data *vlan, *tmpsdata; 451 struct beacon_data *old_beacon = 452 rtnl_dereference(sdata->u.ap.beacon); 453 454 /* sdata_running will return false, so this will disable */ 455 ieee80211_bss_info_change_notify(sdata, 456 BSS_CHANGED_BEACON_ENABLED); 457 458 /* remove beacon */ 459 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 460 synchronize_rcu(); 461 kfree(old_beacon); 462 463 /* free all potentially still buffered bcast frames */ 464 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { 465 local->total_ps_buffered--; 466 dev_kfree_skb(skb); 467 } 468 469 /* down all dependent devices, that is VLANs */ 470 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 471 u.vlan.list) 472 dev_close(vlan->dev); 473 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 474 } 475 476 if (going_down) 477 local->open_count--; 478 479 switch (sdata->vif.type) { 480 case NL80211_IFTYPE_AP_VLAN: 481 list_del(&sdata->u.vlan.list); 482 /* no need to tell driver */ 483 break; 484 case NL80211_IFTYPE_MONITOR: 485 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 486 local->cooked_mntrs--; 487 break; 488 } 489 490 local->monitors--; 491 if (local->monitors == 0) { 492 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 493 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 494 } 495 496 ieee80211_adjust_monitor_flags(sdata, -1); 497 ieee80211_configure_filter(local); 498 break; 499 default: 500 flush_work(&sdata->work); 501 /* 502 * When we get here, the interface is marked down. 503 * Call synchronize_rcu() to wait for the RX path 504 * should it be using the interface and enqueuing 505 * frames at this very time on another CPU. 506 */ 507 synchronize_rcu(); 508 skb_queue_purge(&sdata->skb_queue); 509 510 /* 511 * Disable beaconing here for mesh only, AP and IBSS 512 * are already taken care of. 513 */ 514 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 515 ieee80211_bss_info_change_notify(sdata, 516 BSS_CHANGED_BEACON_ENABLED); 517 518 /* 519 * Free all remaining keys, there shouldn't be any, 520 * except maybe group keys in AP more or WDS? 521 */ 522 ieee80211_free_keys(sdata); 523 524 if (going_down) 525 drv_remove_interface(local, &sdata->vif); 526 } 527 528 sdata->bss = NULL; 529 530 mutex_lock(&local->mtx); 531 hw_reconf_flags |= __ieee80211_recalc_idle(local); 532 mutex_unlock(&local->mtx); 533 534 ieee80211_recalc_ps(local, -1); 535 536 if (local->open_count == 0) { 537 if (local->ops->napi_poll) 538 napi_disable(&local->napi); 539 ieee80211_clear_tx_pending(local); 540 ieee80211_stop_device(local); 541 542 /* no reconfiguring after stop! */ 543 hw_reconf_flags = 0; 544 } 545 546 /* Re-calculate channel-type, in case there are multiple vifs 547 * on different channel types. 548 */ 549 orig_ct = local->_oper_channel_type; 550 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 551 552 /* do after stop to avoid reconfiguring when we stop anyway */ 553 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 554 ieee80211_hw_config(local, hw_reconf_flags); 555 556 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 557 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 558 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 560 if (info->control.vif == &sdata->vif) { 561 __skb_unlink(skb, &local->pending[i]); 562 dev_kfree_skb_irq(skb); 563 } 564 } 565 } 566 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 567 } 568 569 static int ieee80211_stop(struct net_device *dev) 570 { 571 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 572 573 ieee80211_do_stop(sdata, true); 574 575 return 0; 576 } 577 578 static void ieee80211_set_multicast_list(struct net_device *dev) 579 { 580 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 581 struct ieee80211_local *local = sdata->local; 582 int allmulti, promisc, sdata_allmulti, sdata_promisc; 583 584 allmulti = !!(dev->flags & IFF_ALLMULTI); 585 promisc = !!(dev->flags & IFF_PROMISC); 586 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 587 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 588 589 if (allmulti != sdata_allmulti) { 590 if (dev->flags & IFF_ALLMULTI) 591 atomic_inc(&local->iff_allmultis); 592 else 593 atomic_dec(&local->iff_allmultis); 594 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 595 } 596 597 if (promisc != sdata_promisc) { 598 if (dev->flags & IFF_PROMISC) 599 atomic_inc(&local->iff_promiscs); 600 else 601 atomic_dec(&local->iff_promiscs); 602 sdata->flags ^= IEEE80211_SDATA_PROMISC; 603 } 604 spin_lock_bh(&local->filter_lock); 605 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 606 spin_unlock_bh(&local->filter_lock); 607 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 608 } 609 610 /* 611 * Called when the netdev is removed or, by the code below, before 612 * the interface type changes. 613 */ 614 static void ieee80211_teardown_sdata(struct net_device *dev) 615 { 616 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 617 struct ieee80211_local *local = sdata->local; 618 int flushed; 619 int i; 620 621 /* free extra data */ 622 ieee80211_free_keys(sdata); 623 624 ieee80211_debugfs_remove_netdev(sdata); 625 626 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 627 __skb_queue_purge(&sdata->fragments[i].skb_list); 628 sdata->fragment_next = 0; 629 630 if (ieee80211_vif_is_mesh(&sdata->vif)) 631 mesh_rmc_free(sdata); 632 633 flushed = sta_info_flush(local, sdata); 634 WARN_ON(flushed); 635 } 636 637 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 638 struct sk_buff *skb) 639 { 640 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 641 } 642 643 static const struct net_device_ops ieee80211_dataif_ops = { 644 .ndo_open = ieee80211_open, 645 .ndo_stop = ieee80211_stop, 646 .ndo_uninit = ieee80211_teardown_sdata, 647 .ndo_start_xmit = ieee80211_subif_start_xmit, 648 .ndo_set_multicast_list = ieee80211_set_multicast_list, 649 .ndo_change_mtu = ieee80211_change_mtu, 650 .ndo_set_mac_address = ieee80211_change_mac, 651 .ndo_select_queue = ieee80211_netdev_select_queue, 652 }; 653 654 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 655 struct sk_buff *skb) 656 { 657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 658 struct ieee80211_local *local = sdata->local; 659 struct ieee80211_hdr *hdr; 660 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 661 u8 *p; 662 663 if (local->hw.queues < 4) 664 return 0; 665 666 if (skb->len < 4 || 667 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 668 return 0; /* doesn't matter, frame will be dropped */ 669 670 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 671 672 if (!ieee80211_is_data(hdr->frame_control)) { 673 skb->priority = 7; 674 return ieee802_1d_to_ac[skb->priority]; 675 } 676 if (!ieee80211_is_data_qos(hdr->frame_control)) { 677 skb->priority = 0; 678 return ieee802_1d_to_ac[skb->priority]; 679 } 680 681 p = ieee80211_get_qos_ctl(hdr); 682 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; 683 684 return ieee80211_downgrade_queue(local, skb); 685 } 686 687 static const struct net_device_ops ieee80211_monitorif_ops = { 688 .ndo_open = ieee80211_open, 689 .ndo_stop = ieee80211_stop, 690 .ndo_uninit = ieee80211_teardown_sdata, 691 .ndo_start_xmit = ieee80211_monitor_start_xmit, 692 .ndo_set_multicast_list = ieee80211_set_multicast_list, 693 .ndo_change_mtu = ieee80211_change_mtu, 694 .ndo_set_mac_address = eth_mac_addr, 695 .ndo_select_queue = ieee80211_monitor_select_queue, 696 }; 697 698 static void ieee80211_if_setup(struct net_device *dev) 699 { 700 ether_setup(dev); 701 dev->netdev_ops = &ieee80211_dataif_ops; 702 dev->destructor = free_netdev; 703 } 704 705 static void ieee80211_iface_work(struct work_struct *work) 706 { 707 struct ieee80211_sub_if_data *sdata = 708 container_of(work, struct ieee80211_sub_if_data, work); 709 struct ieee80211_local *local = sdata->local; 710 struct sk_buff *skb; 711 struct sta_info *sta; 712 struct ieee80211_ra_tid *ra_tid; 713 714 if (!ieee80211_sdata_running(sdata)) 715 return; 716 717 if (local->scanning) 718 return; 719 720 /* 721 * ieee80211_queue_work() should have picked up most cases, 722 * here we'll pick the rest. 723 */ 724 if (WARN(local->suspended, 725 "interface work scheduled while going to suspend\n")) 726 return; 727 728 /* first process frames */ 729 while ((skb = skb_dequeue(&sdata->skb_queue))) { 730 struct ieee80211_mgmt *mgmt = (void *)skb->data; 731 732 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 733 ra_tid = (void *)&skb->cb; 734 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 735 ra_tid->tid); 736 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 737 ra_tid = (void *)&skb->cb; 738 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 739 ra_tid->tid); 740 } else if (ieee80211_is_action(mgmt->frame_control) && 741 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 742 int len = skb->len; 743 744 mutex_lock(&local->sta_mtx); 745 sta = sta_info_get_bss(sdata, mgmt->sa); 746 if (sta) { 747 switch (mgmt->u.action.u.addba_req.action_code) { 748 case WLAN_ACTION_ADDBA_REQ: 749 ieee80211_process_addba_request( 750 local, sta, mgmt, len); 751 break; 752 case WLAN_ACTION_ADDBA_RESP: 753 ieee80211_process_addba_resp(local, sta, 754 mgmt, len); 755 break; 756 case WLAN_ACTION_DELBA: 757 ieee80211_process_delba(sdata, sta, 758 mgmt, len); 759 break; 760 default: 761 WARN_ON(1); 762 break; 763 } 764 } 765 mutex_unlock(&local->sta_mtx); 766 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 767 struct ieee80211_hdr *hdr = (void *)mgmt; 768 /* 769 * So the frame isn't mgmt, but frame_control 770 * is at the right place anyway, of course, so 771 * the if statement is correct. 772 * 773 * Warn if we have other data frame types here, 774 * they must not get here. 775 */ 776 WARN_ON(hdr->frame_control & 777 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 778 WARN_ON(!(hdr->seq_ctrl & 779 cpu_to_le16(IEEE80211_SCTL_FRAG))); 780 /* 781 * This was a fragment of a frame, received while 782 * a block-ack session was active. That cannot be 783 * right, so terminate the session. 784 */ 785 mutex_lock(&local->sta_mtx); 786 sta = sta_info_get_bss(sdata, mgmt->sa); 787 if (sta) { 788 u16 tid = *ieee80211_get_qos_ctl(hdr) & 789 IEEE80211_QOS_CTL_TID_MASK; 790 791 __ieee80211_stop_rx_ba_session( 792 sta, tid, WLAN_BACK_RECIPIENT, 793 WLAN_REASON_QSTA_REQUIRE_SETUP, 794 true); 795 } 796 mutex_unlock(&local->sta_mtx); 797 } else switch (sdata->vif.type) { 798 case NL80211_IFTYPE_STATION: 799 ieee80211_sta_rx_queued_mgmt(sdata, skb); 800 break; 801 case NL80211_IFTYPE_ADHOC: 802 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 803 break; 804 case NL80211_IFTYPE_MESH_POINT: 805 if (!ieee80211_vif_is_mesh(&sdata->vif)) 806 break; 807 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 808 break; 809 default: 810 WARN(1, "frame for unexpected interface type"); 811 break; 812 } 813 814 kfree_skb(skb); 815 } 816 817 /* then other type-dependent work */ 818 switch (sdata->vif.type) { 819 case NL80211_IFTYPE_STATION: 820 ieee80211_sta_work(sdata); 821 break; 822 case NL80211_IFTYPE_ADHOC: 823 ieee80211_ibss_work(sdata); 824 break; 825 case NL80211_IFTYPE_MESH_POINT: 826 if (!ieee80211_vif_is_mesh(&sdata->vif)) 827 break; 828 ieee80211_mesh_work(sdata); 829 break; 830 default: 831 break; 832 } 833 } 834 835 836 /* 837 * Helper function to initialise an interface to a specific type. 838 */ 839 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 840 enum nl80211_iftype type) 841 { 842 /* clear type-dependent union */ 843 memset(&sdata->u, 0, sizeof(sdata->u)); 844 845 /* and set some type-dependent values */ 846 sdata->vif.type = type; 847 sdata->vif.p2p = false; 848 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 849 sdata->wdev.iftype = type; 850 851 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 852 sdata->control_port_no_encrypt = false; 853 854 /* only monitor differs */ 855 sdata->dev->type = ARPHRD_ETHER; 856 857 skb_queue_head_init(&sdata->skb_queue); 858 INIT_WORK(&sdata->work, ieee80211_iface_work); 859 860 switch (type) { 861 case NL80211_IFTYPE_P2P_GO: 862 type = NL80211_IFTYPE_AP; 863 sdata->vif.type = type; 864 sdata->vif.p2p = true; 865 /* fall through */ 866 case NL80211_IFTYPE_AP: 867 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 868 INIT_LIST_HEAD(&sdata->u.ap.vlans); 869 break; 870 case NL80211_IFTYPE_P2P_CLIENT: 871 type = NL80211_IFTYPE_STATION; 872 sdata->vif.type = type; 873 sdata->vif.p2p = true; 874 /* fall through */ 875 case NL80211_IFTYPE_STATION: 876 ieee80211_sta_setup_sdata(sdata); 877 break; 878 case NL80211_IFTYPE_ADHOC: 879 ieee80211_ibss_setup_sdata(sdata); 880 break; 881 case NL80211_IFTYPE_MESH_POINT: 882 if (ieee80211_vif_is_mesh(&sdata->vif)) 883 ieee80211_mesh_init_sdata(sdata); 884 break; 885 case NL80211_IFTYPE_MONITOR: 886 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 887 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 888 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 889 MONITOR_FLAG_OTHER_BSS; 890 break; 891 case NL80211_IFTYPE_WDS: 892 case NL80211_IFTYPE_AP_VLAN: 893 break; 894 case NL80211_IFTYPE_UNSPECIFIED: 895 case NUM_NL80211_IFTYPES: 896 BUG(); 897 break; 898 } 899 900 ieee80211_debugfs_add_netdev(sdata); 901 } 902 903 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 904 enum nl80211_iftype type) 905 { 906 struct ieee80211_local *local = sdata->local; 907 int ret, err; 908 enum nl80211_iftype internal_type = type; 909 bool p2p = false; 910 911 ASSERT_RTNL(); 912 913 if (!local->ops->change_interface) 914 return -EBUSY; 915 916 switch (sdata->vif.type) { 917 case NL80211_IFTYPE_AP: 918 case NL80211_IFTYPE_STATION: 919 case NL80211_IFTYPE_ADHOC: 920 /* 921 * Could maybe also all others here? 922 * Just not sure how that interacts 923 * with the RX/config path e.g. for 924 * mesh. 925 */ 926 break; 927 default: 928 return -EBUSY; 929 } 930 931 switch (type) { 932 case NL80211_IFTYPE_AP: 933 case NL80211_IFTYPE_STATION: 934 case NL80211_IFTYPE_ADHOC: 935 /* 936 * Could probably support everything 937 * but WDS here (WDS do_open can fail 938 * under memory pressure, which this 939 * code isn't prepared to handle). 940 */ 941 break; 942 case NL80211_IFTYPE_P2P_CLIENT: 943 p2p = true; 944 internal_type = NL80211_IFTYPE_STATION; 945 break; 946 case NL80211_IFTYPE_P2P_GO: 947 p2p = true; 948 internal_type = NL80211_IFTYPE_AP; 949 break; 950 default: 951 return -EBUSY; 952 } 953 954 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 955 if (ret) 956 return ret; 957 958 ieee80211_do_stop(sdata, false); 959 960 ieee80211_teardown_sdata(sdata->dev); 961 962 ret = drv_change_interface(local, sdata, internal_type, p2p); 963 if (ret) 964 type = sdata->vif.type; 965 966 ieee80211_setup_sdata(sdata, type); 967 968 err = ieee80211_do_open(sdata->dev, false); 969 WARN(err, "type change: do_open returned %d", err); 970 971 return ret; 972 } 973 974 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 975 enum nl80211_iftype type) 976 { 977 int ret; 978 979 ASSERT_RTNL(); 980 981 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 982 return 0; 983 984 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 985 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 986 type == NL80211_IFTYPE_ADHOC) 987 return -EOPNOTSUPP; 988 989 if (ieee80211_sdata_running(sdata)) { 990 ret = ieee80211_runtime_change_iftype(sdata, type); 991 if (ret) 992 return ret; 993 } else { 994 /* Purge and reset type-dependent state. */ 995 ieee80211_teardown_sdata(sdata->dev); 996 ieee80211_setup_sdata(sdata, type); 997 } 998 999 /* reset some values that shouldn't be kept across type changes */ 1000 sdata->vif.bss_conf.basic_rates = 1001 ieee80211_mandatory_rates(sdata->local, 1002 sdata->local->hw.conf.channel->band); 1003 sdata->drop_unencrypted = 0; 1004 if (type == NL80211_IFTYPE_STATION) 1005 sdata->u.mgd.use_4addr = false; 1006 1007 return 0; 1008 } 1009 1010 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1011 struct net_device *dev, 1012 enum nl80211_iftype type) 1013 { 1014 struct ieee80211_sub_if_data *sdata; 1015 u64 mask, start, addr, val, inc; 1016 u8 *m; 1017 u8 tmp_addr[ETH_ALEN]; 1018 int i; 1019 1020 /* default ... something at least */ 1021 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1022 1023 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1024 local->hw.wiphy->n_addresses <= 1) 1025 return; 1026 1027 1028 mutex_lock(&local->iflist_mtx); 1029 1030 switch (type) { 1031 case NL80211_IFTYPE_MONITOR: 1032 /* doesn't matter */ 1033 break; 1034 case NL80211_IFTYPE_WDS: 1035 case NL80211_IFTYPE_AP_VLAN: 1036 /* match up with an AP interface */ 1037 list_for_each_entry(sdata, &local->interfaces, list) { 1038 if (sdata->vif.type != NL80211_IFTYPE_AP) 1039 continue; 1040 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1041 break; 1042 } 1043 /* keep default if no AP interface present */ 1044 break; 1045 default: 1046 /* assign a new address if possible -- try n_addresses first */ 1047 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1048 bool used = false; 1049 1050 list_for_each_entry(sdata, &local->interfaces, list) { 1051 if (memcmp(local->hw.wiphy->addresses[i].addr, 1052 sdata->vif.addr, ETH_ALEN) == 0) { 1053 used = true; 1054 break; 1055 } 1056 } 1057 1058 if (!used) { 1059 memcpy(dev->perm_addr, 1060 local->hw.wiphy->addresses[i].addr, 1061 ETH_ALEN); 1062 break; 1063 } 1064 } 1065 1066 /* try mask if available */ 1067 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1068 break; 1069 1070 m = local->hw.wiphy->addr_mask; 1071 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1072 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1073 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1074 1075 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1076 /* not a contiguous mask ... not handled now! */ 1077 printk(KERN_DEBUG "not contiguous\n"); 1078 break; 1079 } 1080 1081 m = local->hw.wiphy->perm_addr; 1082 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1083 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1084 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1085 1086 inc = 1ULL<<__ffs64(mask); 1087 val = (start & mask); 1088 addr = (start & ~mask) | (val & mask); 1089 do { 1090 bool used = false; 1091 1092 tmp_addr[5] = addr >> 0*8; 1093 tmp_addr[4] = addr >> 1*8; 1094 tmp_addr[3] = addr >> 2*8; 1095 tmp_addr[2] = addr >> 3*8; 1096 tmp_addr[1] = addr >> 4*8; 1097 tmp_addr[0] = addr >> 5*8; 1098 1099 val += inc; 1100 1101 list_for_each_entry(sdata, &local->interfaces, list) { 1102 if (memcmp(tmp_addr, sdata->vif.addr, 1103 ETH_ALEN) == 0) { 1104 used = true; 1105 break; 1106 } 1107 } 1108 1109 if (!used) { 1110 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1111 break; 1112 } 1113 addr = (start & ~mask) | (val & mask); 1114 } while (addr != start); 1115 1116 break; 1117 } 1118 1119 mutex_unlock(&local->iflist_mtx); 1120 } 1121 1122 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1123 struct net_device **new_dev, enum nl80211_iftype type, 1124 struct vif_params *params) 1125 { 1126 struct net_device *ndev; 1127 struct ieee80211_sub_if_data *sdata = NULL; 1128 int ret, i; 1129 1130 ASSERT_RTNL(); 1131 1132 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size, 1133 name, ieee80211_if_setup, local->hw.queues, 1); 1134 if (!ndev) 1135 return -ENOMEM; 1136 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1137 1138 ndev->needed_headroom = local->tx_headroom + 1139 4*6 /* four MAC addresses */ 1140 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1141 + 6 /* mesh */ 1142 + 8 /* rfc1042/bridge tunnel */ 1143 - ETH_HLEN /* ethernet hard_header_len */ 1144 + IEEE80211_ENCRYPT_HEADROOM; 1145 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1146 1147 ret = dev_alloc_name(ndev, ndev->name); 1148 if (ret < 0) 1149 goto fail; 1150 1151 ieee80211_assign_perm_addr(local, ndev, type); 1152 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1153 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1154 1155 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1156 sdata = netdev_priv(ndev); 1157 ndev->ieee80211_ptr = &sdata->wdev; 1158 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1159 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1160 1161 /* initialise type-independent data */ 1162 sdata->wdev.wiphy = local->hw.wiphy; 1163 sdata->local = local; 1164 sdata->dev = ndev; 1165 #ifdef CONFIG_INET 1166 sdata->arp_filter_state = true; 1167 #endif 1168 1169 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1170 skb_queue_head_init(&sdata->fragments[i].skb_list); 1171 1172 INIT_LIST_HEAD(&sdata->key_list); 1173 1174 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1175 struct ieee80211_supported_band *sband; 1176 sband = local->hw.wiphy->bands[i]; 1177 sdata->rc_rateidx_mask[i] = 1178 sband ? (1 << sband->n_bitrates) - 1 : 0; 1179 } 1180 1181 /* setup type-dependent data */ 1182 ieee80211_setup_sdata(sdata, type); 1183 1184 if (params) { 1185 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1186 if (type == NL80211_IFTYPE_STATION) 1187 sdata->u.mgd.use_4addr = params->use_4addr; 1188 } 1189 1190 ret = register_netdevice(ndev); 1191 if (ret) 1192 goto fail; 1193 1194 mutex_lock(&local->iflist_mtx); 1195 list_add_tail_rcu(&sdata->list, &local->interfaces); 1196 mutex_unlock(&local->iflist_mtx); 1197 1198 if (new_dev) 1199 *new_dev = ndev; 1200 1201 return 0; 1202 1203 fail: 1204 free_netdev(ndev); 1205 return ret; 1206 } 1207 1208 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1209 { 1210 ASSERT_RTNL(); 1211 1212 mutex_lock(&sdata->local->iflist_mtx); 1213 list_del_rcu(&sdata->list); 1214 mutex_unlock(&sdata->local->iflist_mtx); 1215 1216 synchronize_rcu(); 1217 unregister_netdevice(sdata->dev); 1218 } 1219 1220 /* 1221 * Remove all interfaces, may only be called at hardware unregistration 1222 * time because it doesn't do RCU-safe list removals. 1223 */ 1224 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1225 { 1226 struct ieee80211_sub_if_data *sdata, *tmp; 1227 LIST_HEAD(unreg_list); 1228 1229 ASSERT_RTNL(); 1230 1231 mutex_lock(&local->iflist_mtx); 1232 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1233 list_del(&sdata->list); 1234 1235 unregister_netdevice_queue(sdata->dev, &unreg_list); 1236 } 1237 mutex_unlock(&local->iflist_mtx); 1238 unregister_netdevice_many(&unreg_list); 1239 list_del(&unreg_list); 1240 } 1241 1242 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1243 const char *reason) 1244 { 1245 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1246 return 0; 1247 1248 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1249 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1250 #endif 1251 1252 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1253 return IEEE80211_CONF_CHANGE_IDLE; 1254 } 1255 1256 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1257 { 1258 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1259 return 0; 1260 1261 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1262 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1263 #endif 1264 1265 drv_flush(local, false); 1266 1267 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1268 return IEEE80211_CONF_CHANGE_IDLE; 1269 } 1270 1271 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1272 { 1273 struct ieee80211_sub_if_data *sdata; 1274 int count = 0; 1275 bool working = false, scanning = false, hw_roc = false; 1276 struct ieee80211_work *wk; 1277 unsigned int led_trig_start = 0, led_trig_stop = 0; 1278 1279 #ifdef CONFIG_PROVE_LOCKING 1280 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1281 !lockdep_is_held(&local->iflist_mtx)); 1282 #endif 1283 lockdep_assert_held(&local->mtx); 1284 1285 list_for_each_entry(sdata, &local->interfaces, list) { 1286 if (!ieee80211_sdata_running(sdata)) { 1287 sdata->vif.bss_conf.idle = true; 1288 continue; 1289 } 1290 1291 sdata->old_idle = sdata->vif.bss_conf.idle; 1292 1293 /* do not count disabled managed interfaces */ 1294 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1295 !sdata->u.mgd.associated) { 1296 sdata->vif.bss_conf.idle = true; 1297 continue; 1298 } 1299 /* do not count unused IBSS interfaces */ 1300 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1301 !sdata->u.ibss.ssid_len) { 1302 sdata->vif.bss_conf.idle = true; 1303 continue; 1304 } 1305 /* count everything else */ 1306 count++; 1307 } 1308 1309 list_for_each_entry(wk, &local->work_list, list) { 1310 working = true; 1311 wk->sdata->vif.bss_conf.idle = false; 1312 } 1313 1314 if (local->scan_sdata) { 1315 scanning = true; 1316 local->scan_sdata->vif.bss_conf.idle = false; 1317 } 1318 1319 if (local->hw_roc_channel) 1320 hw_roc = true; 1321 1322 list_for_each_entry(sdata, &local->interfaces, list) { 1323 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1324 continue; 1325 if (!ieee80211_sdata_running(sdata)) 1326 continue; 1327 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1328 } 1329 1330 if (working || scanning || hw_roc) 1331 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1332 else 1333 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1334 1335 if (count) 1336 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1337 else 1338 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1339 1340 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1341 1342 if (hw_roc) 1343 return ieee80211_idle_off(local, "hw remain-on-channel"); 1344 if (working) 1345 return ieee80211_idle_off(local, "working"); 1346 if (scanning) 1347 return ieee80211_idle_off(local, "scanning"); 1348 if (!count) 1349 return ieee80211_idle_on(local); 1350 else 1351 return ieee80211_idle_off(local, "in use"); 1352 1353 return 0; 1354 } 1355 1356 void ieee80211_recalc_idle(struct ieee80211_local *local) 1357 { 1358 u32 chg; 1359 1360 mutex_lock(&local->iflist_mtx); 1361 chg = __ieee80211_recalc_idle(local); 1362 mutex_unlock(&local->iflist_mtx); 1363 if (chg) 1364 ieee80211_hw_config(local, chg); 1365 } 1366 1367 static int netdev_notify(struct notifier_block *nb, 1368 unsigned long state, 1369 void *ndev) 1370 { 1371 struct net_device *dev = ndev; 1372 struct ieee80211_sub_if_data *sdata; 1373 1374 if (state != NETDEV_CHANGENAME) 1375 return 0; 1376 1377 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1378 return 0; 1379 1380 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1381 return 0; 1382 1383 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1384 1385 memcpy(sdata->name, dev->name, IFNAMSIZ); 1386 1387 ieee80211_debugfs_rename_netdev(sdata); 1388 return 0; 1389 } 1390 1391 static struct notifier_block mac80211_netdev_notifier = { 1392 .notifier_call = netdev_notify, 1393 }; 1394 1395 int ieee80211_iface_init(void) 1396 { 1397 return register_netdevice_notifier(&mac80211_netdev_notifier); 1398 } 1399 1400 void ieee80211_iface_exit(void) 1401 { 1402 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1403 } 1404