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 struct ieee80211_sub_if_data *master; 193 194 if (!sdata->bss) 195 return -ENOLINK; 196 197 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 198 199 master = container_of(sdata->bss, 200 struct ieee80211_sub_if_data, u.ap); 201 sdata->control_port_protocol = 202 master->control_port_protocol; 203 sdata->control_port_no_encrypt = 204 master->control_port_no_encrypt; 205 break; 206 } 207 case NL80211_IFTYPE_AP: 208 sdata->bss = &sdata->u.ap; 209 break; 210 case NL80211_IFTYPE_MESH_POINT: 211 case NL80211_IFTYPE_STATION: 212 case NL80211_IFTYPE_MONITOR: 213 case NL80211_IFTYPE_ADHOC: 214 /* no special treatment */ 215 break; 216 case NL80211_IFTYPE_UNSPECIFIED: 217 case NUM_NL80211_IFTYPES: 218 case NL80211_IFTYPE_P2P_CLIENT: 219 case NL80211_IFTYPE_P2P_GO: 220 /* cannot happen */ 221 WARN_ON(1); 222 break; 223 } 224 225 if (local->open_count == 0) { 226 res = drv_start(local); 227 if (res) 228 goto err_del_bss; 229 if (local->ops->napi_poll) 230 napi_enable(&local->napi); 231 /* we're brought up, everything changes */ 232 hw_reconf_flags = ~0; 233 ieee80211_led_radio(local, true); 234 ieee80211_mod_tpt_led_trig(local, 235 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 236 } 237 238 /* 239 * Copy the hopefully now-present MAC address to 240 * this interface, if it has the special null one. 241 */ 242 if (is_zero_ether_addr(dev->dev_addr)) { 243 memcpy(dev->dev_addr, 244 local->hw.wiphy->perm_addr, 245 ETH_ALEN); 246 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 247 248 if (!is_valid_ether_addr(dev->dev_addr)) { 249 if (!local->open_count) 250 drv_stop(local); 251 return -EADDRNOTAVAIL; 252 } 253 } 254 255 switch (sdata->vif.type) { 256 case NL80211_IFTYPE_AP_VLAN: 257 /* no need to tell driver */ 258 break; 259 case NL80211_IFTYPE_MONITOR: 260 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 261 local->cooked_mntrs++; 262 break; 263 } 264 265 /* must be before the call to ieee80211_configure_filter */ 266 local->monitors++; 267 if (local->monitors == 1) { 268 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 269 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 270 } 271 272 ieee80211_adjust_monitor_flags(sdata, 1); 273 ieee80211_configure_filter(local); 274 275 netif_carrier_on(dev); 276 break; 277 default: 278 if (coming_up) { 279 res = drv_add_interface(local, sdata); 280 if (res) 281 goto err_stop; 282 } 283 284 if (sdata->vif.type == NL80211_IFTYPE_AP) { 285 local->fif_pspoll++; 286 local->fif_probe_req++; 287 288 ieee80211_configure_filter(local); 289 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 290 local->fif_probe_req++; 291 } 292 293 changed |= ieee80211_reset_erp_info(sdata); 294 ieee80211_bss_info_change_notify(sdata, changed); 295 296 if (sdata->vif.type == NL80211_IFTYPE_STATION || 297 sdata->vif.type == NL80211_IFTYPE_ADHOC) 298 netif_carrier_off(dev); 299 else 300 netif_carrier_on(dev); 301 302 /* 303 * set default queue parameters so drivers don't 304 * need to initialise the hardware if the hardware 305 * doesn't start up with sane defaults 306 */ 307 ieee80211_set_wmm_default(sdata); 308 } 309 310 set_bit(SDATA_STATE_RUNNING, &sdata->state); 311 312 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 313 /* Create STA entry for the WDS peer */ 314 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 315 GFP_KERNEL); 316 if (!sta) { 317 res = -ENOMEM; 318 goto err_del_interface; 319 } 320 321 sta_info_move_state(sta, IEEE80211_STA_AUTH); 322 sta_info_move_state(sta, IEEE80211_STA_ASSOC); 323 sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 324 325 res = sta_info_insert(sta); 326 if (res) { 327 /* STA has been freed */ 328 goto err_del_interface; 329 } 330 331 rate_control_rate_init(sta); 332 } 333 334 /* 335 * set_multicast_list will be invoked by the networking core 336 * which will check whether any increments here were done in 337 * error and sync them down to the hardware as filter flags. 338 */ 339 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 340 atomic_inc(&local->iff_allmultis); 341 342 if (sdata->flags & IEEE80211_SDATA_PROMISC) 343 atomic_inc(&local->iff_promiscs); 344 345 mutex_lock(&local->mtx); 346 hw_reconf_flags |= __ieee80211_recalc_idle(local); 347 mutex_unlock(&local->mtx); 348 349 if (coming_up) 350 local->open_count++; 351 352 if (hw_reconf_flags) 353 ieee80211_hw_config(local, hw_reconf_flags); 354 355 ieee80211_recalc_ps(local, -1); 356 357 netif_tx_start_all_queues(dev); 358 359 return 0; 360 err_del_interface: 361 drv_remove_interface(local, sdata); 362 err_stop: 363 if (!local->open_count) 364 drv_stop(local); 365 err_del_bss: 366 sdata->bss = NULL; 367 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 368 list_del(&sdata->u.vlan.list); 369 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 370 return res; 371 } 372 373 static int ieee80211_open(struct net_device *dev) 374 { 375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 376 int err; 377 378 /* fail early if user set an invalid address */ 379 if (!is_valid_ether_addr(dev->dev_addr)) 380 return -EADDRNOTAVAIL; 381 382 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 383 if (err) 384 return err; 385 386 return ieee80211_do_open(dev, true); 387 } 388 389 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 390 bool going_down) 391 { 392 struct ieee80211_local *local = sdata->local; 393 unsigned long flags; 394 struct sk_buff *skb, *tmp; 395 u32 hw_reconf_flags = 0; 396 int i; 397 enum nl80211_channel_type orig_ct; 398 399 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 400 401 if (local->scan_sdata == sdata) 402 ieee80211_scan_cancel(local); 403 404 /* 405 * Stop TX on this interface first. 406 */ 407 netif_tx_stop_all_queues(sdata->dev); 408 409 /* 410 * Purge work for this interface. 411 */ 412 ieee80211_work_purge(sdata); 413 414 /* 415 * Remove all stations associated with this interface. 416 * 417 * This must be done before calling ops->remove_interface() 418 * because otherwise we can later invoke ops->sta_notify() 419 * whenever the STAs are removed, and that invalidates driver 420 * assumptions about always getting a vif pointer that is valid 421 * (because if we remove a STA after ops->remove_interface() 422 * the driver will have removed the vif info already!) 423 * 424 * This is relevant only in AP, WDS and mesh modes, since in 425 * all other modes we've already removed all stations when 426 * disconnecting etc. 427 */ 428 sta_info_flush(local, sdata); 429 430 /* 431 * Don't count this interface for promisc/allmulti while it 432 * is down. dev_mc_unsync() will invoke set_multicast_list 433 * on the master interface which will sync these down to the 434 * hardware as filter flags. 435 */ 436 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 437 atomic_dec(&local->iff_allmultis); 438 439 if (sdata->flags & IEEE80211_SDATA_PROMISC) 440 atomic_dec(&local->iff_promiscs); 441 442 if (sdata->vif.type == NL80211_IFTYPE_AP) { 443 local->fif_pspoll--; 444 local->fif_probe_req--; 445 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 446 local->fif_probe_req--; 447 } 448 449 netif_addr_lock_bh(sdata->dev); 450 spin_lock_bh(&local->filter_lock); 451 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 452 sdata->dev->addr_len); 453 spin_unlock_bh(&local->filter_lock); 454 netif_addr_unlock_bh(sdata->dev); 455 456 ieee80211_configure_filter(local); 457 458 del_timer_sync(&local->dynamic_ps_timer); 459 cancel_work_sync(&local->dynamic_ps_enable_work); 460 461 /* APs need special treatment */ 462 if (sdata->vif.type == NL80211_IFTYPE_AP) { 463 struct ieee80211_sub_if_data *vlan, *tmpsdata; 464 struct beacon_data *old_beacon = 465 rtnl_dereference(sdata->u.ap.beacon); 466 struct sk_buff *old_probe_resp = 467 rtnl_dereference(sdata->u.ap.probe_resp); 468 469 /* sdata_running will return false, so this will disable */ 470 ieee80211_bss_info_change_notify(sdata, 471 BSS_CHANGED_BEACON_ENABLED); 472 473 /* remove beacon and probe response */ 474 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL); 475 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL); 476 synchronize_rcu(); 477 kfree(old_beacon); 478 kfree_skb(old_probe_resp); 479 480 /* down all dependent devices, that is VLANs */ 481 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 482 u.vlan.list) 483 dev_close(vlan->dev); 484 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 485 486 /* free all potentially still buffered bcast frames */ 487 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf); 488 skb_queue_purge(&sdata->u.ap.ps_bc_buf); 489 } 490 491 if (going_down) 492 local->open_count--; 493 494 switch (sdata->vif.type) { 495 case NL80211_IFTYPE_AP_VLAN: 496 list_del(&sdata->u.vlan.list); 497 /* no need to tell driver */ 498 break; 499 case NL80211_IFTYPE_MONITOR: 500 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 501 local->cooked_mntrs--; 502 break; 503 } 504 505 local->monitors--; 506 if (local->monitors == 0) { 507 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 508 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 509 } 510 511 ieee80211_adjust_monitor_flags(sdata, -1); 512 ieee80211_configure_filter(local); 513 break; 514 default: 515 flush_work(&sdata->work); 516 /* 517 * When we get here, the interface is marked down. 518 * Call synchronize_rcu() to wait for the RX path 519 * should it be using the interface and enqueuing 520 * frames at this very time on another CPU. 521 */ 522 synchronize_rcu(); 523 skb_queue_purge(&sdata->skb_queue); 524 525 /* 526 * Disable beaconing here for mesh only, AP and IBSS 527 * are already taken care of. 528 */ 529 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 530 ieee80211_bss_info_change_notify(sdata, 531 BSS_CHANGED_BEACON_ENABLED); 532 533 /* 534 * Free all remaining keys, there shouldn't be any, 535 * except maybe group keys in AP more or WDS? 536 */ 537 ieee80211_free_keys(sdata); 538 539 if (going_down) 540 drv_remove_interface(local, sdata); 541 } 542 543 sdata->bss = NULL; 544 545 mutex_lock(&local->mtx); 546 hw_reconf_flags |= __ieee80211_recalc_idle(local); 547 mutex_unlock(&local->mtx); 548 549 ieee80211_recalc_ps(local, -1); 550 551 if (local->open_count == 0) { 552 if (local->ops->napi_poll) 553 napi_disable(&local->napi); 554 ieee80211_clear_tx_pending(local); 555 ieee80211_stop_device(local); 556 557 /* no reconfiguring after stop! */ 558 hw_reconf_flags = 0; 559 } 560 561 /* Re-calculate channel-type, in case there are multiple vifs 562 * on different channel types. 563 */ 564 orig_ct = local->_oper_channel_type; 565 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 566 567 /* do after stop to avoid reconfiguring when we stop anyway */ 568 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 569 ieee80211_hw_config(local, hw_reconf_flags); 570 571 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 572 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 573 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 574 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 575 if (info->control.vif == &sdata->vif) { 576 __skb_unlink(skb, &local->pending[i]); 577 dev_kfree_skb_irq(skb); 578 } 579 } 580 } 581 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 582 } 583 584 static int ieee80211_stop(struct net_device *dev) 585 { 586 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 587 588 ieee80211_do_stop(sdata, true); 589 590 return 0; 591 } 592 593 static void ieee80211_set_multicast_list(struct net_device *dev) 594 { 595 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 596 struct ieee80211_local *local = sdata->local; 597 int allmulti, promisc, sdata_allmulti, sdata_promisc; 598 599 allmulti = !!(dev->flags & IFF_ALLMULTI); 600 promisc = !!(dev->flags & IFF_PROMISC); 601 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 602 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 603 604 if (allmulti != sdata_allmulti) { 605 if (dev->flags & IFF_ALLMULTI) 606 atomic_inc(&local->iff_allmultis); 607 else 608 atomic_dec(&local->iff_allmultis); 609 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 610 } 611 612 if (promisc != sdata_promisc) { 613 if (dev->flags & IFF_PROMISC) 614 atomic_inc(&local->iff_promiscs); 615 else 616 atomic_dec(&local->iff_promiscs); 617 sdata->flags ^= IEEE80211_SDATA_PROMISC; 618 } 619 spin_lock_bh(&local->filter_lock); 620 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 621 spin_unlock_bh(&local->filter_lock); 622 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 623 } 624 625 /* 626 * Called when the netdev is removed or, by the code below, before 627 * the interface type changes. 628 */ 629 static void ieee80211_teardown_sdata(struct net_device *dev) 630 { 631 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 632 struct ieee80211_local *local = sdata->local; 633 int flushed; 634 int i; 635 636 /* free extra data */ 637 ieee80211_free_keys(sdata); 638 639 ieee80211_debugfs_remove_netdev(sdata); 640 641 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 642 __skb_queue_purge(&sdata->fragments[i].skb_list); 643 sdata->fragment_next = 0; 644 645 if (ieee80211_vif_is_mesh(&sdata->vif)) 646 mesh_rmc_free(sdata); 647 648 flushed = sta_info_flush(local, sdata); 649 WARN_ON(flushed); 650 } 651 652 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 653 struct sk_buff *skb) 654 { 655 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 656 } 657 658 static const struct net_device_ops ieee80211_dataif_ops = { 659 .ndo_open = ieee80211_open, 660 .ndo_stop = ieee80211_stop, 661 .ndo_uninit = ieee80211_teardown_sdata, 662 .ndo_start_xmit = ieee80211_subif_start_xmit, 663 .ndo_set_rx_mode = ieee80211_set_multicast_list, 664 .ndo_change_mtu = ieee80211_change_mtu, 665 .ndo_set_mac_address = ieee80211_change_mac, 666 .ndo_select_queue = ieee80211_netdev_select_queue, 667 }; 668 669 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 670 struct sk_buff *skb) 671 { 672 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 673 struct ieee80211_local *local = sdata->local; 674 struct ieee80211_hdr *hdr; 675 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 676 677 if (local->hw.queues < 4) 678 return 0; 679 680 if (skb->len < 4 || 681 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 682 return 0; /* doesn't matter, frame will be dropped */ 683 684 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 685 686 return ieee80211_select_queue_80211(local, skb, hdr); 687 } 688 689 static const struct net_device_ops ieee80211_monitorif_ops = { 690 .ndo_open = ieee80211_open, 691 .ndo_stop = ieee80211_stop, 692 .ndo_uninit = ieee80211_teardown_sdata, 693 .ndo_start_xmit = ieee80211_monitor_start_xmit, 694 .ndo_set_rx_mode = ieee80211_set_multicast_list, 695 .ndo_change_mtu = ieee80211_change_mtu, 696 .ndo_set_mac_address = eth_mac_addr, 697 .ndo_select_queue = ieee80211_monitor_select_queue, 698 }; 699 700 static void ieee80211_if_setup(struct net_device *dev) 701 { 702 ether_setup(dev); 703 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 704 dev->netdev_ops = &ieee80211_dataif_ops; 705 dev->destructor = free_netdev; 706 } 707 708 static void ieee80211_iface_work(struct work_struct *work) 709 { 710 struct ieee80211_sub_if_data *sdata = 711 container_of(work, struct ieee80211_sub_if_data, work); 712 struct ieee80211_local *local = sdata->local; 713 struct sk_buff *skb; 714 struct sta_info *sta; 715 struct ieee80211_ra_tid *ra_tid; 716 717 if (!ieee80211_sdata_running(sdata)) 718 return; 719 720 if (local->scanning) 721 return; 722 723 /* 724 * ieee80211_queue_work() should have picked up most cases, 725 * here we'll pick the rest. 726 */ 727 if (WARN(local->suspended, 728 "interface work scheduled while going to suspend\n")) 729 return; 730 731 /* first process frames */ 732 while ((skb = skb_dequeue(&sdata->skb_queue))) { 733 struct ieee80211_mgmt *mgmt = (void *)skb->data; 734 735 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 736 ra_tid = (void *)&skb->cb; 737 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 738 ra_tid->tid); 739 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 740 ra_tid = (void *)&skb->cb; 741 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 742 ra_tid->tid); 743 } else if (ieee80211_is_action(mgmt->frame_control) && 744 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 745 int len = skb->len; 746 747 mutex_lock(&local->sta_mtx); 748 sta = sta_info_get_bss(sdata, mgmt->sa); 749 if (sta) { 750 switch (mgmt->u.action.u.addba_req.action_code) { 751 case WLAN_ACTION_ADDBA_REQ: 752 ieee80211_process_addba_request( 753 local, sta, mgmt, len); 754 break; 755 case WLAN_ACTION_ADDBA_RESP: 756 ieee80211_process_addba_resp(local, sta, 757 mgmt, len); 758 break; 759 case WLAN_ACTION_DELBA: 760 ieee80211_process_delba(sdata, sta, 761 mgmt, len); 762 break; 763 default: 764 WARN_ON(1); 765 break; 766 } 767 } 768 mutex_unlock(&local->sta_mtx); 769 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 770 struct ieee80211_hdr *hdr = (void *)mgmt; 771 /* 772 * So the frame isn't mgmt, but frame_control 773 * is at the right place anyway, of course, so 774 * the if statement is correct. 775 * 776 * Warn if we have other data frame types here, 777 * they must not get here. 778 */ 779 WARN_ON(hdr->frame_control & 780 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 781 WARN_ON(!(hdr->seq_ctrl & 782 cpu_to_le16(IEEE80211_SCTL_FRAG))); 783 /* 784 * This was a fragment of a frame, received while 785 * a block-ack session was active. That cannot be 786 * right, so terminate the session. 787 */ 788 mutex_lock(&local->sta_mtx); 789 sta = sta_info_get_bss(sdata, mgmt->sa); 790 if (sta) { 791 u16 tid = *ieee80211_get_qos_ctl(hdr) & 792 IEEE80211_QOS_CTL_TID_MASK; 793 794 __ieee80211_stop_rx_ba_session( 795 sta, tid, WLAN_BACK_RECIPIENT, 796 WLAN_REASON_QSTA_REQUIRE_SETUP, 797 true); 798 } 799 mutex_unlock(&local->sta_mtx); 800 } else switch (sdata->vif.type) { 801 case NL80211_IFTYPE_STATION: 802 ieee80211_sta_rx_queued_mgmt(sdata, skb); 803 break; 804 case NL80211_IFTYPE_ADHOC: 805 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 806 break; 807 case NL80211_IFTYPE_MESH_POINT: 808 if (!ieee80211_vif_is_mesh(&sdata->vif)) 809 break; 810 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 811 break; 812 default: 813 WARN(1, "frame for unexpected interface type"); 814 break; 815 } 816 817 kfree_skb(skb); 818 } 819 820 /* then other type-dependent work */ 821 switch (sdata->vif.type) { 822 case NL80211_IFTYPE_STATION: 823 ieee80211_sta_work(sdata); 824 break; 825 case NL80211_IFTYPE_ADHOC: 826 ieee80211_ibss_work(sdata); 827 break; 828 case NL80211_IFTYPE_MESH_POINT: 829 if (!ieee80211_vif_is_mesh(&sdata->vif)) 830 break; 831 ieee80211_mesh_work(sdata); 832 break; 833 default: 834 break; 835 } 836 } 837 838 839 /* 840 * Helper function to initialise an interface to a specific type. 841 */ 842 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 843 enum nl80211_iftype type) 844 { 845 /* clear type-dependent union */ 846 memset(&sdata->u, 0, sizeof(sdata->u)); 847 848 /* and set some type-dependent values */ 849 sdata->vif.type = type; 850 sdata->vif.p2p = false; 851 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 852 sdata->wdev.iftype = type; 853 854 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 855 sdata->control_port_no_encrypt = false; 856 857 sdata->noack_map = 0; 858 859 /* only monitor differs */ 860 sdata->dev->type = ARPHRD_ETHER; 861 862 skb_queue_head_init(&sdata->skb_queue); 863 INIT_WORK(&sdata->work, ieee80211_iface_work); 864 865 switch (type) { 866 case NL80211_IFTYPE_P2P_GO: 867 type = NL80211_IFTYPE_AP; 868 sdata->vif.type = type; 869 sdata->vif.p2p = true; 870 /* fall through */ 871 case NL80211_IFTYPE_AP: 872 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 873 INIT_LIST_HEAD(&sdata->u.ap.vlans); 874 break; 875 case NL80211_IFTYPE_P2P_CLIENT: 876 type = NL80211_IFTYPE_STATION; 877 sdata->vif.type = type; 878 sdata->vif.p2p = true; 879 /* fall through */ 880 case NL80211_IFTYPE_STATION: 881 ieee80211_sta_setup_sdata(sdata); 882 break; 883 case NL80211_IFTYPE_ADHOC: 884 ieee80211_ibss_setup_sdata(sdata); 885 break; 886 case NL80211_IFTYPE_MESH_POINT: 887 if (ieee80211_vif_is_mesh(&sdata->vif)) 888 ieee80211_mesh_init_sdata(sdata); 889 break; 890 case NL80211_IFTYPE_MONITOR: 891 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 892 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 893 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 894 MONITOR_FLAG_OTHER_BSS; 895 break; 896 case NL80211_IFTYPE_WDS: 897 case NL80211_IFTYPE_AP_VLAN: 898 break; 899 case NL80211_IFTYPE_UNSPECIFIED: 900 case NUM_NL80211_IFTYPES: 901 BUG(); 902 break; 903 } 904 905 ieee80211_debugfs_add_netdev(sdata); 906 } 907 908 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 909 enum nl80211_iftype type) 910 { 911 struct ieee80211_local *local = sdata->local; 912 int ret, err; 913 enum nl80211_iftype internal_type = type; 914 bool p2p = false; 915 916 ASSERT_RTNL(); 917 918 if (!local->ops->change_interface) 919 return -EBUSY; 920 921 switch (sdata->vif.type) { 922 case NL80211_IFTYPE_AP: 923 case NL80211_IFTYPE_STATION: 924 case NL80211_IFTYPE_ADHOC: 925 /* 926 * Could maybe also all others here? 927 * Just not sure how that interacts 928 * with the RX/config path e.g. for 929 * mesh. 930 */ 931 break; 932 default: 933 return -EBUSY; 934 } 935 936 switch (type) { 937 case NL80211_IFTYPE_AP: 938 case NL80211_IFTYPE_STATION: 939 case NL80211_IFTYPE_ADHOC: 940 /* 941 * Could probably support everything 942 * but WDS here (WDS do_open can fail 943 * under memory pressure, which this 944 * code isn't prepared to handle). 945 */ 946 break; 947 case NL80211_IFTYPE_P2P_CLIENT: 948 p2p = true; 949 internal_type = NL80211_IFTYPE_STATION; 950 break; 951 case NL80211_IFTYPE_P2P_GO: 952 p2p = true; 953 internal_type = NL80211_IFTYPE_AP; 954 break; 955 default: 956 return -EBUSY; 957 } 958 959 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 960 if (ret) 961 return ret; 962 963 ieee80211_do_stop(sdata, false); 964 965 ieee80211_teardown_sdata(sdata->dev); 966 967 ret = drv_change_interface(local, sdata, internal_type, p2p); 968 if (ret) 969 type = sdata->vif.type; 970 971 ieee80211_setup_sdata(sdata, type); 972 973 err = ieee80211_do_open(sdata->dev, false); 974 WARN(err, "type change: do_open returned %d", err); 975 976 return ret; 977 } 978 979 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 980 enum nl80211_iftype type) 981 { 982 int ret; 983 984 ASSERT_RTNL(); 985 986 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 987 return 0; 988 989 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 990 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 991 type == NL80211_IFTYPE_ADHOC) 992 return -EOPNOTSUPP; 993 994 if (ieee80211_sdata_running(sdata)) { 995 ret = ieee80211_runtime_change_iftype(sdata, type); 996 if (ret) 997 return ret; 998 } else { 999 /* Purge and reset type-dependent state. */ 1000 ieee80211_teardown_sdata(sdata->dev); 1001 ieee80211_setup_sdata(sdata, type); 1002 } 1003 1004 /* reset some values that shouldn't be kept across type changes */ 1005 sdata->vif.bss_conf.basic_rates = 1006 ieee80211_mandatory_rates(sdata->local, 1007 sdata->local->hw.conf.channel->band); 1008 sdata->drop_unencrypted = 0; 1009 if (type == NL80211_IFTYPE_STATION) 1010 sdata->u.mgd.use_4addr = false; 1011 1012 return 0; 1013 } 1014 1015 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1016 struct net_device *dev, 1017 enum nl80211_iftype type) 1018 { 1019 struct ieee80211_sub_if_data *sdata; 1020 u64 mask, start, addr, val, inc; 1021 u8 *m; 1022 u8 tmp_addr[ETH_ALEN]; 1023 int i; 1024 1025 /* default ... something at least */ 1026 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1027 1028 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1029 local->hw.wiphy->n_addresses <= 1) 1030 return; 1031 1032 1033 mutex_lock(&local->iflist_mtx); 1034 1035 switch (type) { 1036 case NL80211_IFTYPE_MONITOR: 1037 /* doesn't matter */ 1038 break; 1039 case NL80211_IFTYPE_WDS: 1040 case NL80211_IFTYPE_AP_VLAN: 1041 /* match up with an AP interface */ 1042 list_for_each_entry(sdata, &local->interfaces, list) { 1043 if (sdata->vif.type != NL80211_IFTYPE_AP) 1044 continue; 1045 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1046 break; 1047 } 1048 /* keep default if no AP interface present */ 1049 break; 1050 default: 1051 /* assign a new address if possible -- try n_addresses first */ 1052 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1053 bool used = false; 1054 1055 list_for_each_entry(sdata, &local->interfaces, list) { 1056 if (memcmp(local->hw.wiphy->addresses[i].addr, 1057 sdata->vif.addr, ETH_ALEN) == 0) { 1058 used = true; 1059 break; 1060 } 1061 } 1062 1063 if (!used) { 1064 memcpy(dev->perm_addr, 1065 local->hw.wiphy->addresses[i].addr, 1066 ETH_ALEN); 1067 break; 1068 } 1069 } 1070 1071 /* try mask if available */ 1072 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1073 break; 1074 1075 m = local->hw.wiphy->addr_mask; 1076 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1077 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1078 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1079 1080 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1081 /* not a contiguous mask ... not handled now! */ 1082 printk(KERN_DEBUG "not contiguous\n"); 1083 break; 1084 } 1085 1086 m = local->hw.wiphy->perm_addr; 1087 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1088 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1089 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1090 1091 inc = 1ULL<<__ffs64(mask); 1092 val = (start & mask); 1093 addr = (start & ~mask) | (val & mask); 1094 do { 1095 bool used = false; 1096 1097 tmp_addr[5] = addr >> 0*8; 1098 tmp_addr[4] = addr >> 1*8; 1099 tmp_addr[3] = addr >> 2*8; 1100 tmp_addr[2] = addr >> 3*8; 1101 tmp_addr[1] = addr >> 4*8; 1102 tmp_addr[0] = addr >> 5*8; 1103 1104 val += inc; 1105 1106 list_for_each_entry(sdata, &local->interfaces, list) { 1107 if (memcmp(tmp_addr, sdata->vif.addr, 1108 ETH_ALEN) == 0) { 1109 used = true; 1110 break; 1111 } 1112 } 1113 1114 if (!used) { 1115 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1116 break; 1117 } 1118 addr = (start & ~mask) | (val & mask); 1119 } while (addr != start); 1120 1121 break; 1122 } 1123 1124 mutex_unlock(&local->iflist_mtx); 1125 } 1126 1127 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1128 struct net_device **new_dev, enum nl80211_iftype type, 1129 struct vif_params *params) 1130 { 1131 struct net_device *ndev; 1132 struct ieee80211_sub_if_data *sdata = NULL; 1133 int ret, i; 1134 1135 ASSERT_RTNL(); 1136 1137 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size, 1138 name, ieee80211_if_setup, local->hw.queues, 1); 1139 if (!ndev) 1140 return -ENOMEM; 1141 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1142 1143 ndev->needed_headroom = local->tx_headroom + 1144 4*6 /* four MAC addresses */ 1145 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1146 + 6 /* mesh */ 1147 + 8 /* rfc1042/bridge tunnel */ 1148 - ETH_HLEN /* ethernet hard_header_len */ 1149 + IEEE80211_ENCRYPT_HEADROOM; 1150 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1151 1152 ret = dev_alloc_name(ndev, ndev->name); 1153 if (ret < 0) 1154 goto fail; 1155 1156 ieee80211_assign_perm_addr(local, ndev, type); 1157 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1158 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1159 1160 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1161 sdata = netdev_priv(ndev); 1162 ndev->ieee80211_ptr = &sdata->wdev; 1163 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1164 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1165 1166 /* initialise type-independent data */ 1167 sdata->wdev.wiphy = local->hw.wiphy; 1168 sdata->local = local; 1169 sdata->dev = ndev; 1170 #ifdef CONFIG_INET 1171 sdata->arp_filter_state = true; 1172 #endif 1173 1174 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1175 skb_queue_head_init(&sdata->fragments[i].skb_list); 1176 1177 INIT_LIST_HEAD(&sdata->key_list); 1178 1179 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1180 struct ieee80211_supported_band *sband; 1181 sband = local->hw.wiphy->bands[i]; 1182 sdata->rc_rateidx_mask[i] = 1183 sband ? (1 << sband->n_bitrates) - 1 : 0; 1184 } 1185 1186 /* setup type-dependent data */ 1187 ieee80211_setup_sdata(sdata, type); 1188 1189 if (params) { 1190 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1191 if (type == NL80211_IFTYPE_STATION) 1192 sdata->u.mgd.use_4addr = params->use_4addr; 1193 } 1194 1195 ret = register_netdevice(ndev); 1196 if (ret) 1197 goto fail; 1198 1199 mutex_lock(&local->iflist_mtx); 1200 list_add_tail_rcu(&sdata->list, &local->interfaces); 1201 mutex_unlock(&local->iflist_mtx); 1202 1203 if (new_dev) 1204 *new_dev = ndev; 1205 1206 return 0; 1207 1208 fail: 1209 free_netdev(ndev); 1210 return ret; 1211 } 1212 1213 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1214 { 1215 ASSERT_RTNL(); 1216 1217 mutex_lock(&sdata->local->iflist_mtx); 1218 list_del_rcu(&sdata->list); 1219 mutex_unlock(&sdata->local->iflist_mtx); 1220 1221 if (ieee80211_vif_is_mesh(&sdata->vif)) 1222 mesh_path_flush_by_iface(sdata); 1223 1224 synchronize_rcu(); 1225 unregister_netdevice(sdata->dev); 1226 } 1227 1228 /* 1229 * Remove all interfaces, may only be called at hardware unregistration 1230 * time because it doesn't do RCU-safe list removals. 1231 */ 1232 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1233 { 1234 struct ieee80211_sub_if_data *sdata, *tmp; 1235 LIST_HEAD(unreg_list); 1236 1237 ASSERT_RTNL(); 1238 1239 mutex_lock(&local->iflist_mtx); 1240 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1241 list_del(&sdata->list); 1242 1243 if (ieee80211_vif_is_mesh(&sdata->vif)) 1244 mesh_path_flush_by_iface(sdata); 1245 1246 unregister_netdevice_queue(sdata->dev, &unreg_list); 1247 } 1248 mutex_unlock(&local->iflist_mtx); 1249 unregister_netdevice_many(&unreg_list); 1250 list_del(&unreg_list); 1251 } 1252 1253 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1254 const char *reason) 1255 { 1256 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1257 return 0; 1258 1259 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1260 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1261 #endif 1262 1263 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1264 return IEEE80211_CONF_CHANGE_IDLE; 1265 } 1266 1267 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1268 { 1269 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1270 return 0; 1271 1272 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1273 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1274 #endif 1275 1276 drv_flush(local, false); 1277 1278 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1279 return IEEE80211_CONF_CHANGE_IDLE; 1280 } 1281 1282 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1283 { 1284 struct ieee80211_sub_if_data *sdata; 1285 int count = 0; 1286 bool working = false, scanning = false, hw_roc = false; 1287 struct ieee80211_work *wk; 1288 unsigned int led_trig_start = 0, led_trig_stop = 0; 1289 1290 #ifdef CONFIG_PROVE_LOCKING 1291 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1292 !lockdep_is_held(&local->iflist_mtx)); 1293 #endif 1294 lockdep_assert_held(&local->mtx); 1295 1296 list_for_each_entry(sdata, &local->interfaces, list) { 1297 if (!ieee80211_sdata_running(sdata)) { 1298 sdata->vif.bss_conf.idle = true; 1299 continue; 1300 } 1301 1302 sdata->old_idle = sdata->vif.bss_conf.idle; 1303 1304 /* do not count disabled managed interfaces */ 1305 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1306 !sdata->u.mgd.associated) { 1307 sdata->vif.bss_conf.idle = true; 1308 continue; 1309 } 1310 /* do not count unused IBSS interfaces */ 1311 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1312 !sdata->u.ibss.ssid_len) { 1313 sdata->vif.bss_conf.idle = true; 1314 continue; 1315 } 1316 /* count everything else */ 1317 count++; 1318 } 1319 1320 list_for_each_entry(wk, &local->work_list, list) { 1321 working = true; 1322 wk->sdata->vif.bss_conf.idle = false; 1323 } 1324 1325 if (local->scan_sdata) { 1326 scanning = true; 1327 local->scan_sdata->vif.bss_conf.idle = false; 1328 } 1329 1330 if (local->hw_roc_channel) 1331 hw_roc = true; 1332 1333 list_for_each_entry(sdata, &local->interfaces, list) { 1334 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1335 continue; 1336 if (!ieee80211_sdata_running(sdata)) 1337 continue; 1338 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1339 } 1340 1341 if (working || scanning || hw_roc) 1342 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1343 else 1344 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1345 1346 if (count) 1347 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1348 else 1349 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1350 1351 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1352 1353 if (hw_roc) 1354 return ieee80211_idle_off(local, "hw remain-on-channel"); 1355 if (working) 1356 return ieee80211_idle_off(local, "working"); 1357 if (scanning) 1358 return ieee80211_idle_off(local, "scanning"); 1359 if (!count) 1360 return ieee80211_idle_on(local); 1361 else 1362 return ieee80211_idle_off(local, "in use"); 1363 1364 return 0; 1365 } 1366 1367 void ieee80211_recalc_idle(struct ieee80211_local *local) 1368 { 1369 u32 chg; 1370 1371 mutex_lock(&local->iflist_mtx); 1372 chg = __ieee80211_recalc_idle(local); 1373 mutex_unlock(&local->iflist_mtx); 1374 if (chg) 1375 ieee80211_hw_config(local, chg); 1376 } 1377 1378 static int netdev_notify(struct notifier_block *nb, 1379 unsigned long state, 1380 void *ndev) 1381 { 1382 struct net_device *dev = ndev; 1383 struct ieee80211_sub_if_data *sdata; 1384 1385 if (state != NETDEV_CHANGENAME) 1386 return 0; 1387 1388 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1389 return 0; 1390 1391 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1392 return 0; 1393 1394 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1395 1396 memcpy(sdata->name, dev->name, IFNAMSIZ); 1397 1398 ieee80211_debugfs_rename_netdev(sdata); 1399 return 0; 1400 } 1401 1402 static struct notifier_block mac80211_netdev_notifier = { 1403 .notifier_call = netdev_notify, 1404 }; 1405 1406 int ieee80211_iface_init(void) 1407 { 1408 return register_netdevice_notifier(&mac80211_netdev_notifier); 1409 } 1410 1411 void ieee80211_iface_exit(void) 1412 { 1413 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1414 } 1415