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 if (!ieee80211_vif_is_mesh(&sdata->vif)) 201 break; 202 /* mesh ifaces must set allmulti to forward mcast traffic */ 203 atomic_inc(&local->iff_allmultis); 204 break; 205 case NL80211_IFTYPE_STATION: 206 case NL80211_IFTYPE_MONITOR: 207 case NL80211_IFTYPE_ADHOC: 208 /* no special treatment */ 209 break; 210 case NL80211_IFTYPE_UNSPECIFIED: 211 case NUM_NL80211_IFTYPES: 212 case NL80211_IFTYPE_P2P_CLIENT: 213 case NL80211_IFTYPE_P2P_GO: 214 /* cannot happen */ 215 WARN_ON(1); 216 break; 217 } 218 219 if (local->open_count == 0) { 220 res = drv_start(local); 221 if (res) 222 goto err_del_bss; 223 if (local->ops->napi_poll) 224 napi_enable(&local->napi); 225 /* we're brought up, everything changes */ 226 hw_reconf_flags = ~0; 227 ieee80211_led_radio(local, true); 228 } 229 230 /* 231 * Copy the hopefully now-present MAC address to 232 * this interface, if it has the special null one. 233 */ 234 if (is_zero_ether_addr(dev->dev_addr)) { 235 memcpy(dev->dev_addr, 236 local->hw.wiphy->perm_addr, 237 ETH_ALEN); 238 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 239 240 if (!is_valid_ether_addr(dev->dev_addr)) { 241 if (!local->open_count) 242 drv_stop(local); 243 return -EADDRNOTAVAIL; 244 } 245 } 246 247 switch (sdata->vif.type) { 248 case NL80211_IFTYPE_AP_VLAN: 249 /* no need to tell driver */ 250 break; 251 case NL80211_IFTYPE_MONITOR: 252 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 253 local->cooked_mntrs++; 254 break; 255 } 256 257 /* must be before the call to ieee80211_configure_filter */ 258 local->monitors++; 259 if (local->monitors == 1) { 260 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 261 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 262 } 263 264 ieee80211_adjust_monitor_flags(sdata, 1); 265 ieee80211_configure_filter(local); 266 267 netif_carrier_on(dev); 268 break; 269 default: 270 if (coming_up) { 271 res = drv_add_interface(local, &sdata->vif); 272 if (res) 273 goto err_stop; 274 } 275 276 if (ieee80211_vif_is_mesh(&sdata->vif)) { 277 local->fif_other_bss++; 278 ieee80211_configure_filter(local); 279 280 ieee80211_start_mesh(sdata); 281 } else if (sdata->vif.type == NL80211_IFTYPE_AP) { 282 local->fif_pspoll++; 283 local->fif_probe_req++; 284 285 ieee80211_configure_filter(local); 286 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 287 local->fif_probe_req++; 288 } 289 290 changed |= ieee80211_reset_erp_info(sdata); 291 ieee80211_bss_info_change_notify(sdata, changed); 292 293 if (sdata->vif.type == NL80211_IFTYPE_STATION) 294 netif_carrier_off(dev); 295 else 296 netif_carrier_on(dev); 297 } 298 299 set_bit(SDATA_STATE_RUNNING, &sdata->state); 300 301 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 302 /* Create STA entry for the WDS peer */ 303 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 304 GFP_KERNEL); 305 if (!sta) { 306 res = -ENOMEM; 307 goto err_del_interface; 308 } 309 310 /* no locking required since STA is not live yet */ 311 sta->flags |= WLAN_STA_AUTHORIZED; 312 313 res = sta_info_insert(sta); 314 if (res) { 315 /* STA has been freed */ 316 goto err_del_interface; 317 } 318 319 rate_control_rate_init(sta); 320 } 321 322 /* 323 * set_multicast_list will be invoked by the networking core 324 * which will check whether any increments here were done in 325 * error and sync them down to the hardware as filter flags. 326 */ 327 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 328 atomic_inc(&local->iff_allmultis); 329 330 if (sdata->flags & IEEE80211_SDATA_PROMISC) 331 atomic_inc(&local->iff_promiscs); 332 333 mutex_lock(&local->mtx); 334 hw_reconf_flags |= __ieee80211_recalc_idle(local); 335 mutex_unlock(&local->mtx); 336 337 if (coming_up) 338 local->open_count++; 339 340 if (hw_reconf_flags) { 341 ieee80211_hw_config(local, hw_reconf_flags); 342 /* 343 * set default queue parameters so drivers don't 344 * need to initialise the hardware if the hardware 345 * doesn't start up with sane defaults 346 */ 347 ieee80211_set_wmm_default(sdata); 348 } 349 350 ieee80211_recalc_ps(local, -1); 351 352 netif_tx_start_all_queues(dev); 353 354 return 0; 355 err_del_interface: 356 drv_remove_interface(local, &sdata->vif); 357 err_stop: 358 if (!local->open_count) 359 drv_stop(local); 360 err_del_bss: 361 sdata->bss = NULL; 362 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 363 list_del(&sdata->u.vlan.list); 364 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 365 return res; 366 } 367 368 static int ieee80211_open(struct net_device *dev) 369 { 370 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 371 int err; 372 373 /* fail early if user set an invalid address */ 374 if (!is_zero_ether_addr(dev->dev_addr) && 375 !is_valid_ether_addr(dev->dev_addr)) 376 return -EADDRNOTAVAIL; 377 378 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 379 if (err) 380 return err; 381 382 return ieee80211_do_open(dev, true); 383 } 384 385 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 386 bool going_down) 387 { 388 struct ieee80211_local *local = sdata->local; 389 unsigned long flags; 390 struct sk_buff *skb, *tmp; 391 u32 hw_reconf_flags = 0; 392 int i; 393 394 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 395 396 /* 397 * Stop TX on this interface first. 398 */ 399 netif_tx_stop_all_queues(sdata->dev); 400 401 /* 402 * Purge work for this interface. 403 */ 404 ieee80211_work_purge(sdata); 405 406 /* 407 * Remove all stations associated with this interface. 408 * 409 * This must be done before calling ops->remove_interface() 410 * because otherwise we can later invoke ops->sta_notify() 411 * whenever the STAs are removed, and that invalidates driver 412 * assumptions about always getting a vif pointer that is valid 413 * (because if we remove a STA after ops->remove_interface() 414 * the driver will have removed the vif info already!) 415 * 416 * This is relevant only in AP, WDS and mesh modes, since in 417 * all other modes we've already removed all stations when 418 * disconnecting etc. 419 */ 420 sta_info_flush(local, sdata); 421 422 /* 423 * Don't count this interface for promisc/allmulti while it 424 * is down. dev_mc_unsync() will invoke set_multicast_list 425 * on the master interface which will sync these down to the 426 * hardware as filter flags. 427 */ 428 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 429 atomic_dec(&local->iff_allmultis); 430 431 if (sdata->flags & IEEE80211_SDATA_PROMISC) 432 atomic_dec(&local->iff_promiscs); 433 434 if (sdata->vif.type == NL80211_IFTYPE_AP) { 435 local->fif_pspoll--; 436 local->fif_probe_req--; 437 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 438 local->fif_probe_req--; 439 } 440 441 netif_addr_lock_bh(sdata->dev); 442 spin_lock_bh(&local->filter_lock); 443 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 444 sdata->dev->addr_len); 445 spin_unlock_bh(&local->filter_lock); 446 netif_addr_unlock_bh(sdata->dev); 447 448 ieee80211_configure_filter(local); 449 450 del_timer_sync(&local->dynamic_ps_timer); 451 cancel_work_sync(&local->dynamic_ps_enable_work); 452 453 /* APs need special treatment */ 454 if (sdata->vif.type == NL80211_IFTYPE_AP) { 455 struct ieee80211_sub_if_data *vlan, *tmpsdata; 456 struct beacon_data *old_beacon = sdata->u.ap.beacon; 457 458 /* sdata_running will return false, so this will disable */ 459 ieee80211_bss_info_change_notify(sdata, 460 BSS_CHANGED_BEACON_ENABLED); 461 462 /* remove beacon */ 463 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 464 synchronize_rcu(); 465 kfree(old_beacon); 466 467 /* free all potentially still buffered bcast frames */ 468 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { 469 local->total_ps_buffered--; 470 dev_kfree_skb(skb); 471 } 472 473 /* down all dependent devices, that is VLANs */ 474 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 475 u.vlan.list) 476 dev_close(vlan->dev); 477 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 478 } 479 480 if (going_down) 481 local->open_count--; 482 483 switch (sdata->vif.type) { 484 case NL80211_IFTYPE_AP_VLAN: 485 list_del(&sdata->u.vlan.list); 486 /* no need to tell driver */ 487 break; 488 case NL80211_IFTYPE_MONITOR: 489 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 490 local->cooked_mntrs--; 491 break; 492 } 493 494 local->monitors--; 495 if (local->monitors == 0) { 496 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 497 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 498 } 499 500 ieee80211_adjust_monitor_flags(sdata, -1); 501 ieee80211_configure_filter(local); 502 break; 503 case NL80211_IFTYPE_MESH_POINT: 504 if (ieee80211_vif_is_mesh(&sdata->vif)) { 505 /* other_bss and allmulti are always set on mesh 506 * ifaces */ 507 local->fif_other_bss--; 508 atomic_dec(&local->iff_allmultis); 509 510 ieee80211_configure_filter(local); 511 512 ieee80211_stop_mesh(sdata); 513 } 514 /* fall through */ 515 default: 516 flush_work(&sdata->work); 517 /* 518 * When we get here, the interface is marked down. 519 * Call synchronize_rcu() to wait for the RX path 520 * should it be using the interface and enqueuing 521 * frames at this very time on another CPU. 522 */ 523 synchronize_rcu(); 524 skb_queue_purge(&sdata->skb_queue); 525 526 if (local->scan_sdata == sdata) 527 ieee80211_scan_cancel(local); 528 529 /* 530 * Disable beaconing here for mesh only, AP and IBSS 531 * are already taken care of. 532 */ 533 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 534 ieee80211_bss_info_change_notify(sdata, 535 BSS_CHANGED_BEACON_ENABLED); 536 537 /* 538 * Free all remaining keys, there shouldn't be any, 539 * except maybe group keys in AP more or WDS? 540 */ 541 ieee80211_free_keys(sdata); 542 543 if (going_down) 544 drv_remove_interface(local, &sdata->vif); 545 } 546 547 sdata->bss = NULL; 548 549 mutex_lock(&local->mtx); 550 hw_reconf_flags |= __ieee80211_recalc_idle(local); 551 mutex_unlock(&local->mtx); 552 553 ieee80211_recalc_ps(local, -1); 554 555 if (local->open_count == 0) { 556 if (local->ops->napi_poll) 557 napi_disable(&local->napi); 558 ieee80211_clear_tx_pending(local); 559 ieee80211_stop_device(local); 560 561 /* no reconfiguring after stop! */ 562 hw_reconf_flags = 0; 563 } 564 565 /* do after stop to avoid reconfiguring when we stop anyway */ 566 if (hw_reconf_flags) 567 ieee80211_hw_config(local, hw_reconf_flags); 568 569 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 570 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 571 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 573 if (info->control.vif == &sdata->vif) { 574 __skb_unlink(skb, &local->pending[i]); 575 dev_kfree_skb_irq(skb); 576 } 577 } 578 } 579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 580 } 581 582 static int ieee80211_stop(struct net_device *dev) 583 { 584 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 585 586 ieee80211_do_stop(sdata, true); 587 588 return 0; 589 } 590 591 static void ieee80211_set_multicast_list(struct net_device *dev) 592 { 593 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 594 struct ieee80211_local *local = sdata->local; 595 int allmulti, promisc, sdata_allmulti, sdata_promisc; 596 597 allmulti = !!(dev->flags & IFF_ALLMULTI); 598 promisc = !!(dev->flags & IFF_PROMISC); 599 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 600 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 601 602 if (allmulti != sdata_allmulti) { 603 if (dev->flags & IFF_ALLMULTI) 604 atomic_inc(&local->iff_allmultis); 605 else 606 atomic_dec(&local->iff_allmultis); 607 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 608 } 609 610 if (promisc != sdata_promisc) { 611 if (dev->flags & IFF_PROMISC) 612 atomic_inc(&local->iff_promiscs); 613 else 614 atomic_dec(&local->iff_promiscs); 615 sdata->flags ^= IEEE80211_SDATA_PROMISC; 616 } 617 spin_lock_bh(&local->filter_lock); 618 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 619 spin_unlock_bh(&local->filter_lock); 620 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 621 } 622 623 /* 624 * Called when the netdev is removed or, by the code below, before 625 * the interface type changes. 626 */ 627 static void ieee80211_teardown_sdata(struct net_device *dev) 628 { 629 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 630 struct ieee80211_local *local = sdata->local; 631 int flushed; 632 int i; 633 634 /* free extra data */ 635 ieee80211_free_keys(sdata); 636 637 ieee80211_debugfs_remove_netdev(sdata); 638 639 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 640 __skb_queue_purge(&sdata->fragments[i].skb_list); 641 sdata->fragment_next = 0; 642 643 if (ieee80211_vif_is_mesh(&sdata->vif)) 644 mesh_rmc_free(sdata); 645 646 flushed = sta_info_flush(local, sdata); 647 WARN_ON(flushed); 648 } 649 650 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 651 struct sk_buff *skb) 652 { 653 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 654 } 655 656 static const struct net_device_ops ieee80211_dataif_ops = { 657 .ndo_open = ieee80211_open, 658 .ndo_stop = ieee80211_stop, 659 .ndo_uninit = ieee80211_teardown_sdata, 660 .ndo_start_xmit = ieee80211_subif_start_xmit, 661 .ndo_set_multicast_list = ieee80211_set_multicast_list, 662 .ndo_change_mtu = ieee80211_change_mtu, 663 .ndo_set_mac_address = ieee80211_change_mac, 664 .ndo_select_queue = ieee80211_netdev_select_queue, 665 }; 666 667 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 668 struct sk_buff *skb) 669 { 670 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 671 struct ieee80211_local *local = sdata->local; 672 struct ieee80211_hdr *hdr; 673 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 674 u8 *p; 675 676 if (local->hw.queues < 4) 677 return 0; 678 679 if (skb->len < 4 || 680 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 681 return 0; /* doesn't matter, frame will be dropped */ 682 683 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 684 685 if (!ieee80211_is_data(hdr->frame_control)) { 686 skb->priority = 7; 687 return ieee802_1d_to_ac[skb->priority]; 688 } 689 if (!ieee80211_is_data_qos(hdr->frame_control)) { 690 skb->priority = 0; 691 return ieee802_1d_to_ac[skb->priority]; 692 } 693 694 p = ieee80211_get_qos_ctl(hdr); 695 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; 696 697 return ieee80211_downgrade_queue(local, skb); 698 } 699 700 static const struct net_device_ops ieee80211_monitorif_ops = { 701 .ndo_open = ieee80211_open, 702 .ndo_stop = ieee80211_stop, 703 .ndo_uninit = ieee80211_teardown_sdata, 704 .ndo_start_xmit = ieee80211_monitor_start_xmit, 705 .ndo_set_multicast_list = ieee80211_set_multicast_list, 706 .ndo_change_mtu = ieee80211_change_mtu, 707 .ndo_set_mac_address = eth_mac_addr, 708 .ndo_select_queue = ieee80211_monitor_select_queue, 709 }; 710 711 static void ieee80211_if_setup(struct net_device *dev) 712 { 713 ether_setup(dev); 714 dev->netdev_ops = &ieee80211_dataif_ops; 715 dev->destructor = free_netdev; 716 } 717 718 static void ieee80211_iface_work(struct work_struct *work) 719 { 720 struct ieee80211_sub_if_data *sdata = 721 container_of(work, struct ieee80211_sub_if_data, work); 722 struct ieee80211_local *local = sdata->local; 723 struct sk_buff *skb; 724 struct sta_info *sta; 725 struct ieee80211_ra_tid *ra_tid; 726 727 if (!ieee80211_sdata_running(sdata)) 728 return; 729 730 if (local->scanning) 731 return; 732 733 /* 734 * ieee80211_queue_work() should have picked up most cases, 735 * here we'll pick the rest. 736 */ 737 if (WARN(local->suspended, 738 "interface work scheduled while going to suspend\n")) 739 return; 740 741 /* first process frames */ 742 while ((skb = skb_dequeue(&sdata->skb_queue))) { 743 struct ieee80211_mgmt *mgmt = (void *)skb->data; 744 745 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 746 ra_tid = (void *)&skb->cb; 747 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 748 ra_tid->tid); 749 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 750 ra_tid = (void *)&skb->cb; 751 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 752 ra_tid->tid); 753 } else if (ieee80211_is_action(mgmt->frame_control) && 754 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 755 int len = skb->len; 756 757 mutex_lock(&local->sta_mtx); 758 sta = sta_info_get_bss(sdata, mgmt->sa); 759 if (sta) { 760 switch (mgmt->u.action.u.addba_req.action_code) { 761 case WLAN_ACTION_ADDBA_REQ: 762 ieee80211_process_addba_request( 763 local, sta, mgmt, len); 764 break; 765 case WLAN_ACTION_ADDBA_RESP: 766 ieee80211_process_addba_resp(local, sta, 767 mgmt, len); 768 break; 769 case WLAN_ACTION_DELBA: 770 ieee80211_process_delba(sdata, sta, 771 mgmt, len); 772 break; 773 default: 774 WARN_ON(1); 775 break; 776 } 777 } 778 mutex_unlock(&local->sta_mtx); 779 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 780 struct ieee80211_hdr *hdr = (void *)mgmt; 781 /* 782 * So the frame isn't mgmt, but frame_control 783 * is at the right place anyway, of course, so 784 * the if statement is correct. 785 * 786 * Warn if we have other data frame types here, 787 * they must not get here. 788 */ 789 WARN_ON(hdr->frame_control & 790 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 791 WARN_ON(!(hdr->seq_ctrl & 792 cpu_to_le16(IEEE80211_SCTL_FRAG))); 793 /* 794 * This was a fragment of a frame, received while 795 * a block-ack session was active. That cannot be 796 * right, so terminate the session. 797 */ 798 mutex_lock(&local->sta_mtx); 799 sta = sta_info_get_bss(sdata, mgmt->sa); 800 if (sta) { 801 u16 tid = *ieee80211_get_qos_ctl(hdr) & 802 IEEE80211_QOS_CTL_TID_MASK; 803 804 __ieee80211_stop_rx_ba_session( 805 sta, tid, WLAN_BACK_RECIPIENT, 806 WLAN_REASON_QSTA_REQUIRE_SETUP, 807 true); 808 } 809 mutex_unlock(&local->sta_mtx); 810 } else switch (sdata->vif.type) { 811 case NL80211_IFTYPE_STATION: 812 ieee80211_sta_rx_queued_mgmt(sdata, skb); 813 break; 814 case NL80211_IFTYPE_ADHOC: 815 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 816 break; 817 case NL80211_IFTYPE_MESH_POINT: 818 if (!ieee80211_vif_is_mesh(&sdata->vif)) 819 break; 820 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 821 break; 822 default: 823 WARN(1, "frame for unexpected interface type"); 824 break; 825 } 826 827 kfree_skb(skb); 828 } 829 830 /* then other type-dependent work */ 831 switch (sdata->vif.type) { 832 case NL80211_IFTYPE_STATION: 833 ieee80211_sta_work(sdata); 834 break; 835 case NL80211_IFTYPE_ADHOC: 836 ieee80211_ibss_work(sdata); 837 break; 838 case NL80211_IFTYPE_MESH_POINT: 839 if (!ieee80211_vif_is_mesh(&sdata->vif)) 840 break; 841 ieee80211_mesh_work(sdata); 842 break; 843 default: 844 break; 845 } 846 } 847 848 849 /* 850 * Helper function to initialise an interface to a specific type. 851 */ 852 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 853 enum nl80211_iftype type) 854 { 855 /* clear type-dependent union */ 856 memset(&sdata->u, 0, sizeof(sdata->u)); 857 858 /* and set some type-dependent values */ 859 sdata->vif.type = type; 860 sdata->vif.p2p = false; 861 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 862 sdata->wdev.iftype = type; 863 864 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 865 sdata->control_port_no_encrypt = false; 866 867 /* only monitor differs */ 868 sdata->dev->type = ARPHRD_ETHER; 869 870 skb_queue_head_init(&sdata->skb_queue); 871 INIT_WORK(&sdata->work, ieee80211_iface_work); 872 873 switch (type) { 874 case NL80211_IFTYPE_P2P_GO: 875 type = NL80211_IFTYPE_AP; 876 sdata->vif.type = type; 877 sdata->vif.p2p = true; 878 /* fall through */ 879 case NL80211_IFTYPE_AP: 880 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 881 INIT_LIST_HEAD(&sdata->u.ap.vlans); 882 break; 883 case NL80211_IFTYPE_P2P_CLIENT: 884 type = NL80211_IFTYPE_STATION; 885 sdata->vif.type = type; 886 sdata->vif.p2p = true; 887 /* fall through */ 888 case NL80211_IFTYPE_STATION: 889 ieee80211_sta_setup_sdata(sdata); 890 break; 891 case NL80211_IFTYPE_ADHOC: 892 ieee80211_ibss_setup_sdata(sdata); 893 break; 894 case NL80211_IFTYPE_MESH_POINT: 895 if (ieee80211_vif_is_mesh(&sdata->vif)) 896 ieee80211_mesh_init_sdata(sdata); 897 break; 898 case NL80211_IFTYPE_MONITOR: 899 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 900 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 901 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 902 MONITOR_FLAG_OTHER_BSS; 903 break; 904 case NL80211_IFTYPE_WDS: 905 case NL80211_IFTYPE_AP_VLAN: 906 break; 907 case NL80211_IFTYPE_UNSPECIFIED: 908 case NUM_NL80211_IFTYPES: 909 BUG(); 910 break; 911 } 912 913 ieee80211_debugfs_add_netdev(sdata); 914 } 915 916 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 917 enum nl80211_iftype type) 918 { 919 struct ieee80211_local *local = sdata->local; 920 int ret, err; 921 enum nl80211_iftype internal_type = type; 922 bool p2p = false; 923 924 ASSERT_RTNL(); 925 926 if (!local->ops->change_interface) 927 return -EBUSY; 928 929 switch (sdata->vif.type) { 930 case NL80211_IFTYPE_AP: 931 case NL80211_IFTYPE_STATION: 932 case NL80211_IFTYPE_ADHOC: 933 /* 934 * Could maybe also all others here? 935 * Just not sure how that interacts 936 * with the RX/config path e.g. for 937 * mesh. 938 */ 939 break; 940 default: 941 return -EBUSY; 942 } 943 944 switch (type) { 945 case NL80211_IFTYPE_AP: 946 case NL80211_IFTYPE_STATION: 947 case NL80211_IFTYPE_ADHOC: 948 /* 949 * Could probably support everything 950 * but WDS here (WDS do_open can fail 951 * under memory pressure, which this 952 * code isn't prepared to handle). 953 */ 954 break; 955 case NL80211_IFTYPE_P2P_CLIENT: 956 p2p = true; 957 internal_type = NL80211_IFTYPE_STATION; 958 break; 959 case NL80211_IFTYPE_P2P_GO: 960 p2p = true; 961 internal_type = NL80211_IFTYPE_AP; 962 break; 963 default: 964 return -EBUSY; 965 } 966 967 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 968 if (ret) 969 return ret; 970 971 ieee80211_do_stop(sdata, false); 972 973 ieee80211_teardown_sdata(sdata->dev); 974 975 ret = drv_change_interface(local, sdata, internal_type, p2p); 976 if (ret) 977 type = sdata->vif.type; 978 979 ieee80211_setup_sdata(sdata, type); 980 981 err = ieee80211_do_open(sdata->dev, false); 982 WARN(err, "type change: do_open returned %d", err); 983 984 return ret; 985 } 986 987 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 988 enum nl80211_iftype type) 989 { 990 int ret; 991 992 ASSERT_RTNL(); 993 994 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 995 return 0; 996 997 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 998 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 999 type == NL80211_IFTYPE_ADHOC) 1000 return -EOPNOTSUPP; 1001 1002 if (ieee80211_sdata_running(sdata)) { 1003 ret = ieee80211_runtime_change_iftype(sdata, type); 1004 if (ret) 1005 return ret; 1006 } else { 1007 /* Purge and reset type-dependent state. */ 1008 ieee80211_teardown_sdata(sdata->dev); 1009 ieee80211_setup_sdata(sdata, type); 1010 } 1011 1012 /* reset some values that shouldn't be kept across type changes */ 1013 sdata->vif.bss_conf.basic_rates = 1014 ieee80211_mandatory_rates(sdata->local, 1015 sdata->local->hw.conf.channel->band); 1016 sdata->drop_unencrypted = 0; 1017 if (type == NL80211_IFTYPE_STATION) 1018 sdata->u.mgd.use_4addr = false; 1019 1020 return 0; 1021 } 1022 1023 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1024 struct net_device *dev, 1025 enum nl80211_iftype type) 1026 { 1027 struct ieee80211_sub_if_data *sdata; 1028 u64 mask, start, addr, val, inc; 1029 u8 *m; 1030 u8 tmp_addr[ETH_ALEN]; 1031 int i; 1032 1033 /* default ... something at least */ 1034 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1035 1036 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1037 local->hw.wiphy->n_addresses <= 1) 1038 return; 1039 1040 1041 mutex_lock(&local->iflist_mtx); 1042 1043 switch (type) { 1044 case NL80211_IFTYPE_MONITOR: 1045 /* doesn't matter */ 1046 break; 1047 case NL80211_IFTYPE_WDS: 1048 case NL80211_IFTYPE_AP_VLAN: 1049 /* match up with an AP interface */ 1050 list_for_each_entry(sdata, &local->interfaces, list) { 1051 if (sdata->vif.type != NL80211_IFTYPE_AP) 1052 continue; 1053 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1054 break; 1055 } 1056 /* keep default if no AP interface present */ 1057 break; 1058 default: 1059 /* assign a new address if possible -- try n_addresses first */ 1060 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1061 bool used = false; 1062 1063 list_for_each_entry(sdata, &local->interfaces, list) { 1064 if (memcmp(local->hw.wiphy->addresses[i].addr, 1065 sdata->vif.addr, ETH_ALEN) == 0) { 1066 used = true; 1067 break; 1068 } 1069 } 1070 1071 if (!used) { 1072 memcpy(dev->perm_addr, 1073 local->hw.wiphy->addresses[i].addr, 1074 ETH_ALEN); 1075 break; 1076 } 1077 } 1078 1079 /* try mask if available */ 1080 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1081 break; 1082 1083 m = local->hw.wiphy->addr_mask; 1084 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1085 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1086 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1087 1088 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1089 /* not a contiguous mask ... not handled now! */ 1090 printk(KERN_DEBUG "not contiguous\n"); 1091 break; 1092 } 1093 1094 m = local->hw.wiphy->perm_addr; 1095 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1096 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1097 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1098 1099 inc = 1ULL<<__ffs64(mask); 1100 val = (start & mask); 1101 addr = (start & ~mask) | (val & mask); 1102 do { 1103 bool used = false; 1104 1105 tmp_addr[5] = addr >> 0*8; 1106 tmp_addr[4] = addr >> 1*8; 1107 tmp_addr[3] = addr >> 2*8; 1108 tmp_addr[2] = addr >> 3*8; 1109 tmp_addr[1] = addr >> 4*8; 1110 tmp_addr[0] = addr >> 5*8; 1111 1112 val += inc; 1113 1114 list_for_each_entry(sdata, &local->interfaces, list) { 1115 if (memcmp(tmp_addr, sdata->vif.addr, 1116 ETH_ALEN) == 0) { 1117 used = true; 1118 break; 1119 } 1120 } 1121 1122 if (!used) { 1123 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1124 break; 1125 } 1126 addr = (start & ~mask) | (val & mask); 1127 } while (addr != start); 1128 1129 break; 1130 } 1131 1132 mutex_unlock(&local->iflist_mtx); 1133 } 1134 1135 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1136 struct net_device **new_dev, enum nl80211_iftype type, 1137 struct vif_params *params) 1138 { 1139 struct net_device *ndev; 1140 struct ieee80211_sub_if_data *sdata = NULL; 1141 int ret, i; 1142 1143 ASSERT_RTNL(); 1144 1145 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, 1146 name, ieee80211_if_setup, local->hw.queues); 1147 if (!ndev) 1148 return -ENOMEM; 1149 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1150 1151 ndev->needed_headroom = local->tx_headroom + 1152 4*6 /* four MAC addresses */ 1153 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1154 + 6 /* mesh */ 1155 + 8 /* rfc1042/bridge tunnel */ 1156 - ETH_HLEN /* ethernet hard_header_len */ 1157 + IEEE80211_ENCRYPT_HEADROOM; 1158 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1159 1160 ret = dev_alloc_name(ndev, ndev->name); 1161 if (ret < 0) 1162 goto fail; 1163 1164 ieee80211_assign_perm_addr(local, ndev, type); 1165 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1166 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1167 1168 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1169 sdata = netdev_priv(ndev); 1170 ndev->ieee80211_ptr = &sdata->wdev; 1171 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1172 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1173 1174 /* initialise type-independent data */ 1175 sdata->wdev.wiphy = local->hw.wiphy; 1176 sdata->local = local; 1177 sdata->dev = ndev; 1178 #ifdef CONFIG_INET 1179 sdata->arp_filter_state = true; 1180 #endif 1181 1182 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1183 skb_queue_head_init(&sdata->fragments[i].skb_list); 1184 1185 INIT_LIST_HEAD(&sdata->key_list); 1186 1187 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1188 struct ieee80211_supported_band *sband; 1189 sband = local->hw.wiphy->bands[i]; 1190 sdata->rc_rateidx_mask[i] = 1191 sband ? (1 << sband->n_bitrates) - 1 : 0; 1192 } 1193 1194 /* setup type-dependent data */ 1195 ieee80211_setup_sdata(sdata, type); 1196 1197 if (params) { 1198 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1199 if (type == NL80211_IFTYPE_STATION) 1200 sdata->u.mgd.use_4addr = params->use_4addr; 1201 } 1202 1203 ret = register_netdevice(ndev); 1204 if (ret) 1205 goto fail; 1206 1207 if (ieee80211_vif_is_mesh(&sdata->vif) && 1208 params && params->mesh_id_len) 1209 ieee80211_sdata_set_mesh_id(sdata, 1210 params->mesh_id_len, 1211 params->mesh_id); 1212 1213 mutex_lock(&local->iflist_mtx); 1214 list_add_tail_rcu(&sdata->list, &local->interfaces); 1215 mutex_unlock(&local->iflist_mtx); 1216 1217 if (new_dev) 1218 *new_dev = ndev; 1219 1220 return 0; 1221 1222 fail: 1223 free_netdev(ndev); 1224 return ret; 1225 } 1226 1227 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1228 { 1229 ASSERT_RTNL(); 1230 1231 mutex_lock(&sdata->local->iflist_mtx); 1232 list_del_rcu(&sdata->list); 1233 mutex_unlock(&sdata->local->iflist_mtx); 1234 1235 synchronize_rcu(); 1236 unregister_netdevice(sdata->dev); 1237 } 1238 1239 /* 1240 * Remove all interfaces, may only be called at hardware unregistration 1241 * time because it doesn't do RCU-safe list removals. 1242 */ 1243 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1244 { 1245 struct ieee80211_sub_if_data *sdata, *tmp; 1246 LIST_HEAD(unreg_list); 1247 1248 ASSERT_RTNL(); 1249 1250 mutex_lock(&local->iflist_mtx); 1251 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1252 list_del(&sdata->list); 1253 1254 unregister_netdevice_queue(sdata->dev, &unreg_list); 1255 } 1256 mutex_unlock(&local->iflist_mtx); 1257 unregister_netdevice_many(&unreg_list); 1258 } 1259 1260 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1261 const char *reason) 1262 { 1263 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1264 return 0; 1265 1266 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1267 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1268 #endif 1269 1270 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1271 return IEEE80211_CONF_CHANGE_IDLE; 1272 } 1273 1274 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1275 { 1276 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1277 return 0; 1278 1279 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1280 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1281 #endif 1282 1283 drv_flush(local, false); 1284 1285 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1286 return IEEE80211_CONF_CHANGE_IDLE; 1287 } 1288 1289 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1290 { 1291 struct ieee80211_sub_if_data *sdata; 1292 int count = 0; 1293 bool working = false, scanning = false; 1294 struct ieee80211_work *wk; 1295 1296 #ifdef CONFIG_PROVE_LOCKING 1297 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1298 !lockdep_is_held(&local->iflist_mtx)); 1299 #endif 1300 lockdep_assert_held(&local->mtx); 1301 1302 list_for_each_entry(sdata, &local->interfaces, list) { 1303 if (!ieee80211_sdata_running(sdata)) { 1304 sdata->vif.bss_conf.idle = true; 1305 continue; 1306 } 1307 1308 sdata->old_idle = sdata->vif.bss_conf.idle; 1309 1310 /* do not count disabled managed interfaces */ 1311 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1312 !sdata->u.mgd.associated) { 1313 sdata->vif.bss_conf.idle = true; 1314 continue; 1315 } 1316 /* do not count unused IBSS interfaces */ 1317 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1318 !sdata->u.ibss.ssid_len) { 1319 sdata->vif.bss_conf.idle = true; 1320 continue; 1321 } 1322 /* count everything else */ 1323 count++; 1324 } 1325 1326 list_for_each_entry(wk, &local->work_list, list) { 1327 working = true; 1328 wk->sdata->vif.bss_conf.idle = false; 1329 } 1330 1331 if (local->scan_sdata) { 1332 scanning = true; 1333 local->scan_sdata->vif.bss_conf.idle = false; 1334 } 1335 1336 list_for_each_entry(sdata, &local->interfaces, list) { 1337 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1338 continue; 1339 if (!ieee80211_sdata_running(sdata)) 1340 continue; 1341 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1342 } 1343 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