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, true); 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_pre_move_state(sta, IEEE80211_STA_AUTH); 322 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 323 sta_info_pre_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 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { 490 ieee80211_mgd_stop(sdata); 491 } 492 493 if (going_down) 494 local->open_count--; 495 496 switch (sdata->vif.type) { 497 case NL80211_IFTYPE_AP_VLAN: 498 list_del(&sdata->u.vlan.list); 499 /* no need to tell driver */ 500 break; 501 case NL80211_IFTYPE_MONITOR: 502 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 503 local->cooked_mntrs--; 504 break; 505 } 506 507 local->monitors--; 508 if (local->monitors == 0) { 509 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 510 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 511 } 512 513 ieee80211_adjust_monitor_flags(sdata, -1); 514 ieee80211_configure_filter(local); 515 break; 516 default: 517 flush_work(&sdata->work); 518 /* 519 * When we get here, the interface is marked down. 520 * Call synchronize_rcu() to wait for the RX path 521 * should it be using the interface and enqueuing 522 * frames at this very time on another CPU. 523 */ 524 synchronize_rcu(); 525 skb_queue_purge(&sdata->skb_queue); 526 527 /* 528 * Disable beaconing here for mesh only, AP and IBSS 529 * are already taken care of. 530 */ 531 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 532 ieee80211_bss_info_change_notify(sdata, 533 BSS_CHANGED_BEACON_ENABLED); 534 535 /* 536 * Free all remaining keys, there shouldn't be any, 537 * except maybe group keys in AP more or WDS? 538 */ 539 ieee80211_free_keys(sdata); 540 541 if (going_down) 542 drv_remove_interface(local, sdata); 543 } 544 545 sdata->bss = NULL; 546 547 mutex_lock(&local->mtx); 548 hw_reconf_flags |= __ieee80211_recalc_idle(local); 549 mutex_unlock(&local->mtx); 550 551 ieee80211_recalc_ps(local, -1); 552 553 if (local->open_count == 0) { 554 if (local->ops->napi_poll) 555 napi_disable(&local->napi); 556 ieee80211_clear_tx_pending(local); 557 ieee80211_stop_device(local); 558 559 /* no reconfiguring after stop! */ 560 hw_reconf_flags = 0; 561 } 562 563 /* Re-calculate channel-type, in case there are multiple vifs 564 * on different channel types. 565 */ 566 orig_ct = local->_oper_channel_type; 567 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 568 569 /* do after stop to avoid reconfiguring when we stop anyway */ 570 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 571 ieee80211_hw_config(local, hw_reconf_flags); 572 573 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 574 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 575 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 576 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 577 if (info->control.vif == &sdata->vif) { 578 __skb_unlink(skb, &local->pending[i]); 579 dev_kfree_skb_irq(skb); 580 } 581 } 582 } 583 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 584 } 585 586 static int ieee80211_stop(struct net_device *dev) 587 { 588 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 589 590 ieee80211_do_stop(sdata, true); 591 592 return 0; 593 } 594 595 static void ieee80211_set_multicast_list(struct net_device *dev) 596 { 597 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 598 struct ieee80211_local *local = sdata->local; 599 int allmulti, promisc, sdata_allmulti, sdata_promisc; 600 601 allmulti = !!(dev->flags & IFF_ALLMULTI); 602 promisc = !!(dev->flags & IFF_PROMISC); 603 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 604 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 605 606 if (allmulti != sdata_allmulti) { 607 if (dev->flags & IFF_ALLMULTI) 608 atomic_inc(&local->iff_allmultis); 609 else 610 atomic_dec(&local->iff_allmultis); 611 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 612 } 613 614 if (promisc != sdata_promisc) { 615 if (dev->flags & IFF_PROMISC) 616 atomic_inc(&local->iff_promiscs); 617 else 618 atomic_dec(&local->iff_promiscs); 619 sdata->flags ^= IEEE80211_SDATA_PROMISC; 620 } 621 spin_lock_bh(&local->filter_lock); 622 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 623 spin_unlock_bh(&local->filter_lock); 624 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 625 } 626 627 /* 628 * Called when the netdev is removed or, by the code below, before 629 * the interface type changes. 630 */ 631 static void ieee80211_teardown_sdata(struct net_device *dev) 632 { 633 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 634 struct ieee80211_local *local = sdata->local; 635 int flushed; 636 int i; 637 638 /* free extra data */ 639 ieee80211_free_keys(sdata); 640 641 ieee80211_debugfs_remove_netdev(sdata); 642 643 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 644 __skb_queue_purge(&sdata->fragments[i].skb_list); 645 sdata->fragment_next = 0; 646 647 if (ieee80211_vif_is_mesh(&sdata->vif)) 648 mesh_rmc_free(sdata); 649 650 flushed = sta_info_flush(local, sdata); 651 WARN_ON(flushed); 652 } 653 654 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 655 struct sk_buff *skb) 656 { 657 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 658 } 659 660 static const struct net_device_ops ieee80211_dataif_ops = { 661 .ndo_open = ieee80211_open, 662 .ndo_stop = ieee80211_stop, 663 .ndo_uninit = ieee80211_teardown_sdata, 664 .ndo_start_xmit = ieee80211_subif_start_xmit, 665 .ndo_set_rx_mode = ieee80211_set_multicast_list, 666 .ndo_change_mtu = ieee80211_change_mtu, 667 .ndo_set_mac_address = ieee80211_change_mac, 668 .ndo_select_queue = ieee80211_netdev_select_queue, 669 }; 670 671 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 672 struct sk_buff *skb) 673 { 674 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 675 struct ieee80211_local *local = sdata->local; 676 struct ieee80211_hdr *hdr; 677 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 678 679 if (local->hw.queues < 4) 680 return 0; 681 682 if (skb->len < 4 || 683 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 684 return 0; /* doesn't matter, frame will be dropped */ 685 686 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 687 688 return ieee80211_select_queue_80211(local, skb, hdr); 689 } 690 691 static const struct net_device_ops ieee80211_monitorif_ops = { 692 .ndo_open = ieee80211_open, 693 .ndo_stop = ieee80211_stop, 694 .ndo_uninit = ieee80211_teardown_sdata, 695 .ndo_start_xmit = ieee80211_monitor_start_xmit, 696 .ndo_set_rx_mode = ieee80211_set_multicast_list, 697 .ndo_change_mtu = ieee80211_change_mtu, 698 .ndo_set_mac_address = eth_mac_addr, 699 .ndo_select_queue = ieee80211_monitor_select_queue, 700 }; 701 702 static void ieee80211_if_setup(struct net_device *dev) 703 { 704 ether_setup(dev); 705 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 706 dev->netdev_ops = &ieee80211_dataif_ops; 707 dev->destructor = free_netdev; 708 } 709 710 static void ieee80211_iface_work(struct work_struct *work) 711 { 712 struct ieee80211_sub_if_data *sdata = 713 container_of(work, struct ieee80211_sub_if_data, work); 714 struct ieee80211_local *local = sdata->local; 715 struct sk_buff *skb; 716 struct sta_info *sta; 717 struct ieee80211_ra_tid *ra_tid; 718 719 if (!ieee80211_sdata_running(sdata)) 720 return; 721 722 if (local->scanning) 723 return; 724 725 /* 726 * ieee80211_queue_work() should have picked up most cases, 727 * here we'll pick the rest. 728 */ 729 if (WARN(local->suspended, 730 "interface work scheduled while going to suspend\n")) 731 return; 732 733 /* first process frames */ 734 while ((skb = skb_dequeue(&sdata->skb_queue))) { 735 struct ieee80211_mgmt *mgmt = (void *)skb->data; 736 737 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 738 ra_tid = (void *)&skb->cb; 739 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 740 ra_tid->tid); 741 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 742 ra_tid = (void *)&skb->cb; 743 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 744 ra_tid->tid); 745 } else if (ieee80211_is_action(mgmt->frame_control) && 746 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 747 int len = skb->len; 748 749 mutex_lock(&local->sta_mtx); 750 sta = sta_info_get_bss(sdata, mgmt->sa); 751 if (sta) { 752 switch (mgmt->u.action.u.addba_req.action_code) { 753 case WLAN_ACTION_ADDBA_REQ: 754 ieee80211_process_addba_request( 755 local, sta, mgmt, len); 756 break; 757 case WLAN_ACTION_ADDBA_RESP: 758 ieee80211_process_addba_resp(local, sta, 759 mgmt, len); 760 break; 761 case WLAN_ACTION_DELBA: 762 ieee80211_process_delba(sdata, sta, 763 mgmt, len); 764 break; 765 default: 766 WARN_ON(1); 767 break; 768 } 769 } 770 mutex_unlock(&local->sta_mtx); 771 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 772 struct ieee80211_hdr *hdr = (void *)mgmt; 773 /* 774 * So the frame isn't mgmt, but frame_control 775 * is at the right place anyway, of course, so 776 * the if statement is correct. 777 * 778 * Warn if we have other data frame types here, 779 * they must not get here. 780 */ 781 WARN_ON(hdr->frame_control & 782 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 783 WARN_ON(!(hdr->seq_ctrl & 784 cpu_to_le16(IEEE80211_SCTL_FRAG))); 785 /* 786 * This was a fragment of a frame, received while 787 * a block-ack session was active. That cannot be 788 * right, so terminate the session. 789 */ 790 mutex_lock(&local->sta_mtx); 791 sta = sta_info_get_bss(sdata, mgmt->sa); 792 if (sta) { 793 u16 tid = *ieee80211_get_qos_ctl(hdr) & 794 IEEE80211_QOS_CTL_TID_MASK; 795 796 __ieee80211_stop_rx_ba_session( 797 sta, tid, WLAN_BACK_RECIPIENT, 798 WLAN_REASON_QSTA_REQUIRE_SETUP, 799 true); 800 } 801 mutex_unlock(&local->sta_mtx); 802 } else switch (sdata->vif.type) { 803 case NL80211_IFTYPE_STATION: 804 ieee80211_sta_rx_queued_mgmt(sdata, skb); 805 break; 806 case NL80211_IFTYPE_ADHOC: 807 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 808 break; 809 case NL80211_IFTYPE_MESH_POINT: 810 if (!ieee80211_vif_is_mesh(&sdata->vif)) 811 break; 812 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 813 break; 814 default: 815 WARN(1, "frame for unexpected interface type"); 816 break; 817 } 818 819 kfree_skb(skb); 820 } 821 822 /* then other type-dependent work */ 823 switch (sdata->vif.type) { 824 case NL80211_IFTYPE_STATION: 825 ieee80211_sta_work(sdata); 826 break; 827 case NL80211_IFTYPE_ADHOC: 828 ieee80211_ibss_work(sdata); 829 break; 830 case NL80211_IFTYPE_MESH_POINT: 831 if (!ieee80211_vif_is_mesh(&sdata->vif)) 832 break; 833 ieee80211_mesh_work(sdata); 834 break; 835 default: 836 break; 837 } 838 } 839 840 841 /* 842 * Helper function to initialise an interface to a specific type. 843 */ 844 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 845 enum nl80211_iftype type) 846 { 847 /* clear type-dependent union */ 848 memset(&sdata->u, 0, sizeof(sdata->u)); 849 850 /* and set some type-dependent values */ 851 sdata->vif.type = type; 852 sdata->vif.p2p = false; 853 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 854 sdata->wdev.iftype = type; 855 856 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 857 sdata->control_port_no_encrypt = false; 858 859 sdata->noack_map = 0; 860 861 /* only monitor differs */ 862 sdata->dev->type = ARPHRD_ETHER; 863 864 skb_queue_head_init(&sdata->skb_queue); 865 INIT_WORK(&sdata->work, ieee80211_iface_work); 866 867 switch (type) { 868 case NL80211_IFTYPE_P2P_GO: 869 type = NL80211_IFTYPE_AP; 870 sdata->vif.type = type; 871 sdata->vif.p2p = true; 872 /* fall through */ 873 case NL80211_IFTYPE_AP: 874 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 875 INIT_LIST_HEAD(&sdata->u.ap.vlans); 876 break; 877 case NL80211_IFTYPE_P2P_CLIENT: 878 type = NL80211_IFTYPE_STATION; 879 sdata->vif.type = type; 880 sdata->vif.p2p = true; 881 /* fall through */ 882 case NL80211_IFTYPE_STATION: 883 ieee80211_sta_setup_sdata(sdata); 884 break; 885 case NL80211_IFTYPE_ADHOC: 886 ieee80211_ibss_setup_sdata(sdata); 887 break; 888 case NL80211_IFTYPE_MESH_POINT: 889 if (ieee80211_vif_is_mesh(&sdata->vif)) 890 ieee80211_mesh_init_sdata(sdata); 891 break; 892 case NL80211_IFTYPE_MONITOR: 893 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 894 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 895 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 896 MONITOR_FLAG_OTHER_BSS; 897 break; 898 case NL80211_IFTYPE_WDS: 899 case NL80211_IFTYPE_AP_VLAN: 900 break; 901 case NL80211_IFTYPE_UNSPECIFIED: 902 case NUM_NL80211_IFTYPES: 903 BUG(); 904 break; 905 } 906 907 ieee80211_debugfs_add_netdev(sdata); 908 } 909 910 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 911 enum nl80211_iftype type) 912 { 913 struct ieee80211_local *local = sdata->local; 914 int ret, err; 915 enum nl80211_iftype internal_type = type; 916 bool p2p = false; 917 918 ASSERT_RTNL(); 919 920 if (!local->ops->change_interface) 921 return -EBUSY; 922 923 switch (sdata->vif.type) { 924 case NL80211_IFTYPE_AP: 925 case NL80211_IFTYPE_STATION: 926 case NL80211_IFTYPE_ADHOC: 927 /* 928 * Could maybe also all others here? 929 * Just not sure how that interacts 930 * with the RX/config path e.g. for 931 * mesh. 932 */ 933 break; 934 default: 935 return -EBUSY; 936 } 937 938 switch (type) { 939 case NL80211_IFTYPE_AP: 940 case NL80211_IFTYPE_STATION: 941 case NL80211_IFTYPE_ADHOC: 942 /* 943 * Could probably support everything 944 * but WDS here (WDS do_open can fail 945 * under memory pressure, which this 946 * code isn't prepared to handle). 947 */ 948 break; 949 case NL80211_IFTYPE_P2P_CLIENT: 950 p2p = true; 951 internal_type = NL80211_IFTYPE_STATION; 952 break; 953 case NL80211_IFTYPE_P2P_GO: 954 p2p = true; 955 internal_type = NL80211_IFTYPE_AP; 956 break; 957 default: 958 return -EBUSY; 959 } 960 961 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 962 if (ret) 963 return ret; 964 965 ieee80211_do_stop(sdata, false); 966 967 ieee80211_teardown_sdata(sdata->dev); 968 969 ret = drv_change_interface(local, sdata, internal_type, p2p); 970 if (ret) 971 type = sdata->vif.type; 972 973 ieee80211_setup_sdata(sdata, type); 974 975 err = ieee80211_do_open(sdata->dev, false); 976 WARN(err, "type change: do_open returned %d", err); 977 978 return ret; 979 } 980 981 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 982 enum nl80211_iftype type) 983 { 984 int ret; 985 986 ASSERT_RTNL(); 987 988 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 989 return 0; 990 991 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 992 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 993 type == NL80211_IFTYPE_ADHOC) 994 return -EOPNOTSUPP; 995 996 if (ieee80211_sdata_running(sdata)) { 997 ret = ieee80211_runtime_change_iftype(sdata, type); 998 if (ret) 999 return ret; 1000 } else { 1001 /* Purge and reset type-dependent state. */ 1002 ieee80211_teardown_sdata(sdata->dev); 1003 ieee80211_setup_sdata(sdata, type); 1004 } 1005 1006 /* reset some values that shouldn't be kept across type changes */ 1007 sdata->vif.bss_conf.basic_rates = 1008 ieee80211_mandatory_rates(sdata->local, 1009 sdata->local->hw.conf.channel->band); 1010 sdata->drop_unencrypted = 0; 1011 if (type == NL80211_IFTYPE_STATION) 1012 sdata->u.mgd.use_4addr = false; 1013 1014 return 0; 1015 } 1016 1017 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1018 struct net_device *dev, 1019 enum nl80211_iftype type) 1020 { 1021 struct ieee80211_sub_if_data *sdata; 1022 u64 mask, start, addr, val, inc; 1023 u8 *m; 1024 u8 tmp_addr[ETH_ALEN]; 1025 int i; 1026 1027 /* default ... something at least */ 1028 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1029 1030 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1031 local->hw.wiphy->n_addresses <= 1) 1032 return; 1033 1034 1035 mutex_lock(&local->iflist_mtx); 1036 1037 switch (type) { 1038 case NL80211_IFTYPE_MONITOR: 1039 /* doesn't matter */ 1040 break; 1041 case NL80211_IFTYPE_WDS: 1042 case NL80211_IFTYPE_AP_VLAN: 1043 /* match up with an AP interface */ 1044 list_for_each_entry(sdata, &local->interfaces, list) { 1045 if (sdata->vif.type != NL80211_IFTYPE_AP) 1046 continue; 1047 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1048 break; 1049 } 1050 /* keep default if no AP interface present */ 1051 break; 1052 default: 1053 /* assign a new address if possible -- try n_addresses first */ 1054 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1055 bool used = false; 1056 1057 list_for_each_entry(sdata, &local->interfaces, list) { 1058 if (memcmp(local->hw.wiphy->addresses[i].addr, 1059 sdata->vif.addr, ETH_ALEN) == 0) { 1060 used = true; 1061 break; 1062 } 1063 } 1064 1065 if (!used) { 1066 memcpy(dev->perm_addr, 1067 local->hw.wiphy->addresses[i].addr, 1068 ETH_ALEN); 1069 break; 1070 } 1071 } 1072 1073 /* try mask if available */ 1074 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1075 break; 1076 1077 m = local->hw.wiphy->addr_mask; 1078 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1079 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1080 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1081 1082 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1083 /* not a contiguous mask ... not handled now! */ 1084 printk(KERN_DEBUG "not contiguous\n"); 1085 break; 1086 } 1087 1088 m = local->hw.wiphy->perm_addr; 1089 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1090 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1091 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1092 1093 inc = 1ULL<<__ffs64(mask); 1094 val = (start & mask); 1095 addr = (start & ~mask) | (val & mask); 1096 do { 1097 bool used = false; 1098 1099 tmp_addr[5] = addr >> 0*8; 1100 tmp_addr[4] = addr >> 1*8; 1101 tmp_addr[3] = addr >> 2*8; 1102 tmp_addr[2] = addr >> 3*8; 1103 tmp_addr[1] = addr >> 4*8; 1104 tmp_addr[0] = addr >> 5*8; 1105 1106 val += inc; 1107 1108 list_for_each_entry(sdata, &local->interfaces, list) { 1109 if (memcmp(tmp_addr, sdata->vif.addr, 1110 ETH_ALEN) == 0) { 1111 used = true; 1112 break; 1113 } 1114 } 1115 1116 if (!used) { 1117 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1118 break; 1119 } 1120 addr = (start & ~mask) | (val & mask); 1121 } while (addr != start); 1122 1123 break; 1124 } 1125 1126 mutex_unlock(&local->iflist_mtx); 1127 } 1128 1129 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1130 struct net_device **new_dev, enum nl80211_iftype type, 1131 struct vif_params *params) 1132 { 1133 struct net_device *ndev; 1134 struct ieee80211_sub_if_data *sdata = NULL; 1135 int ret, i; 1136 1137 ASSERT_RTNL(); 1138 1139 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size, 1140 name, ieee80211_if_setup, local->hw.queues, 1); 1141 if (!ndev) 1142 return -ENOMEM; 1143 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1144 1145 ndev->needed_headroom = local->tx_headroom + 1146 4*6 /* four MAC addresses */ 1147 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1148 + 6 /* mesh */ 1149 + 8 /* rfc1042/bridge tunnel */ 1150 - ETH_HLEN /* ethernet hard_header_len */ 1151 + IEEE80211_ENCRYPT_HEADROOM; 1152 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1153 1154 ret = dev_alloc_name(ndev, ndev->name); 1155 if (ret < 0) 1156 goto fail; 1157 1158 ieee80211_assign_perm_addr(local, ndev, type); 1159 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1160 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1161 1162 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1163 sdata = netdev_priv(ndev); 1164 ndev->ieee80211_ptr = &sdata->wdev; 1165 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1166 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1167 1168 /* initialise type-independent data */ 1169 sdata->wdev.wiphy = local->hw.wiphy; 1170 sdata->local = local; 1171 sdata->dev = ndev; 1172 #ifdef CONFIG_INET 1173 sdata->arp_filter_state = true; 1174 #endif 1175 1176 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1177 skb_queue_head_init(&sdata->fragments[i].skb_list); 1178 1179 INIT_LIST_HEAD(&sdata->key_list); 1180 1181 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1182 struct ieee80211_supported_band *sband; 1183 sband = local->hw.wiphy->bands[i]; 1184 sdata->rc_rateidx_mask[i] = 1185 sband ? (1 << sband->n_bitrates) - 1 : 0; 1186 if (sband) 1187 memcpy(sdata->rc_rateidx_mcs_mask[i], 1188 sband->ht_cap.mcs.rx_mask, 1189 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1190 else 1191 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1192 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1193 } 1194 1195 /* setup type-dependent data */ 1196 ieee80211_setup_sdata(sdata, type); 1197 1198 if (params) { 1199 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1200 if (type == NL80211_IFTYPE_STATION) 1201 sdata->u.mgd.use_4addr = params->use_4addr; 1202 } 1203 1204 ret = register_netdevice(ndev); 1205 if (ret) 1206 goto fail; 1207 1208 mutex_lock(&local->iflist_mtx); 1209 list_add_tail_rcu(&sdata->list, &local->interfaces); 1210 mutex_unlock(&local->iflist_mtx); 1211 1212 if (new_dev) 1213 *new_dev = ndev; 1214 1215 return 0; 1216 1217 fail: 1218 free_netdev(ndev); 1219 return ret; 1220 } 1221 1222 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1223 { 1224 ASSERT_RTNL(); 1225 1226 mutex_lock(&sdata->local->iflist_mtx); 1227 list_del_rcu(&sdata->list); 1228 mutex_unlock(&sdata->local->iflist_mtx); 1229 1230 if (ieee80211_vif_is_mesh(&sdata->vif)) 1231 mesh_path_flush_by_iface(sdata); 1232 1233 synchronize_rcu(); 1234 unregister_netdevice(sdata->dev); 1235 } 1236 1237 /* 1238 * Remove all interfaces, may only be called at hardware unregistration 1239 * time because it doesn't do RCU-safe list removals. 1240 */ 1241 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1242 { 1243 struct ieee80211_sub_if_data *sdata, *tmp; 1244 LIST_HEAD(unreg_list); 1245 1246 ASSERT_RTNL(); 1247 1248 mutex_lock(&local->iflist_mtx); 1249 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1250 list_del(&sdata->list); 1251 1252 if (ieee80211_vif_is_mesh(&sdata->vif)) 1253 mesh_path_flush_by_iface(sdata); 1254 1255 unregister_netdevice_queue(sdata->dev, &unreg_list); 1256 } 1257 mutex_unlock(&local->iflist_mtx); 1258 unregister_netdevice_many(&unreg_list); 1259 list_del(&unreg_list); 1260 } 1261 1262 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1263 const char *reason) 1264 { 1265 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1266 return 0; 1267 1268 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1269 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1270 #endif 1271 1272 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1273 return IEEE80211_CONF_CHANGE_IDLE; 1274 } 1275 1276 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1277 { 1278 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1279 return 0; 1280 1281 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1282 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1283 #endif 1284 1285 drv_flush(local, false); 1286 1287 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1288 return IEEE80211_CONF_CHANGE_IDLE; 1289 } 1290 1291 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1292 { 1293 struct ieee80211_sub_if_data *sdata; 1294 int count = 0; 1295 bool working = false, scanning = false, hw_roc = false; 1296 struct ieee80211_work *wk; 1297 unsigned int led_trig_start = 0, led_trig_stop = 0; 1298 1299 #ifdef CONFIG_PROVE_LOCKING 1300 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1301 !lockdep_is_held(&local->iflist_mtx)); 1302 #endif 1303 lockdep_assert_held(&local->mtx); 1304 1305 list_for_each_entry(sdata, &local->interfaces, list) { 1306 if (!ieee80211_sdata_running(sdata)) { 1307 sdata->vif.bss_conf.idle = true; 1308 continue; 1309 } 1310 1311 sdata->old_idle = sdata->vif.bss_conf.idle; 1312 1313 /* do not count disabled managed interfaces */ 1314 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1315 !sdata->u.mgd.associated && 1316 !sdata->u.mgd.auth_data && 1317 !sdata->u.mgd.assoc_data) { 1318 sdata->vif.bss_conf.idle = true; 1319 continue; 1320 } 1321 /* do not count unused IBSS interfaces */ 1322 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1323 !sdata->u.ibss.ssid_len) { 1324 sdata->vif.bss_conf.idle = true; 1325 continue; 1326 } 1327 /* count everything else */ 1328 sdata->vif.bss_conf.idle = false; 1329 count++; 1330 } 1331 1332 list_for_each_entry(wk, &local->work_list, list) { 1333 working = true; 1334 wk->sdata->vif.bss_conf.idle = false; 1335 } 1336 1337 if (local->scan_sdata && 1338 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { 1339 scanning = true; 1340 local->scan_sdata->vif.bss_conf.idle = false; 1341 } 1342 1343 if (local->hw_roc_channel) 1344 hw_roc = true; 1345 1346 list_for_each_entry(sdata, &local->interfaces, list) { 1347 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1348 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1349 continue; 1350 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1351 continue; 1352 if (!ieee80211_sdata_running(sdata)) 1353 continue; 1354 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1355 } 1356 1357 if (working || scanning || hw_roc) 1358 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1359 else 1360 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1361 1362 if (count) 1363 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1364 else 1365 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1366 1367 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1368 1369 if (hw_roc) 1370 return ieee80211_idle_off(local, "hw remain-on-channel"); 1371 if (working) 1372 return ieee80211_idle_off(local, "working"); 1373 if (scanning) 1374 return ieee80211_idle_off(local, "scanning"); 1375 if (!count) 1376 return ieee80211_idle_on(local); 1377 else 1378 return ieee80211_idle_off(local, "in use"); 1379 1380 return 0; 1381 } 1382 1383 void ieee80211_recalc_idle(struct ieee80211_local *local) 1384 { 1385 u32 chg; 1386 1387 mutex_lock(&local->iflist_mtx); 1388 chg = __ieee80211_recalc_idle(local); 1389 mutex_unlock(&local->iflist_mtx); 1390 if (chg) 1391 ieee80211_hw_config(local, chg); 1392 } 1393 1394 static int netdev_notify(struct notifier_block *nb, 1395 unsigned long state, 1396 void *ndev) 1397 { 1398 struct net_device *dev = ndev; 1399 struct ieee80211_sub_if_data *sdata; 1400 1401 if (state != NETDEV_CHANGENAME) 1402 return 0; 1403 1404 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1405 return 0; 1406 1407 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1408 return 0; 1409 1410 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1411 1412 memcpy(sdata->name, dev->name, IFNAMSIZ); 1413 1414 ieee80211_debugfs_rename_netdev(sdata); 1415 return 0; 1416 } 1417 1418 static struct notifier_block mac80211_netdev_notifier = { 1419 .notifier_call = netdev_notify, 1420 }; 1421 1422 int ieee80211_iface_init(void) 1423 { 1424 return register_netdevice_notifier(&mac80211_netdev_notifier); 1425 } 1426 1427 void ieee80211_iface_exit(void) 1428 { 1429 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1430 } 1431