1 /* 2 * Interface handling (except master interface) 3 * 4 * Copyright 2002-2005, Instant802 Networks, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc. 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 46 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) 47 { 48 int meshhdrlen; 49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 50 51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; 52 53 /* FIX: what would be proper limits for MTU? 54 * This interface uses 802.3 frames. */ 55 if (new_mtu < 256 || 56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { 57 return -EINVAL; 58 } 59 60 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); 62 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ 63 dev->mtu = new_mtu; 64 return 0; 65 } 66 67 static int ieee80211_change_mac(struct net_device *dev, void *addr) 68 { 69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 70 struct sockaddr *sa = addr; 71 int ret; 72 73 if (ieee80211_sdata_running(sdata)) 74 return -EBUSY; 75 76 ret = eth_mac_addr(dev, sa); 77 78 if (ret == 0) 79 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 80 81 return ret; 82 } 83 84 static inline int identical_mac_addr_allowed(int type1, int type2) 85 { 86 return type1 == NL80211_IFTYPE_MONITOR || 87 type2 == NL80211_IFTYPE_MONITOR || 88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 89 (type1 == NL80211_IFTYPE_WDS && 90 (type2 == NL80211_IFTYPE_WDS || 91 type2 == NL80211_IFTYPE_AP)) || 92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 93 (type1 == NL80211_IFTYPE_AP_VLAN && 94 (type2 == NL80211_IFTYPE_AP || 95 type2 == NL80211_IFTYPE_AP_VLAN)); 96 } 97 98 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 99 enum nl80211_iftype iftype) 100 { 101 struct ieee80211_local *local = sdata->local; 102 struct ieee80211_sub_if_data *nsdata; 103 struct net_device *dev = sdata->dev; 104 105 ASSERT_RTNL(); 106 107 /* we hold the RTNL here so can safely walk the list */ 108 list_for_each_entry(nsdata, &local->interfaces, list) { 109 struct net_device *ndev = nsdata->dev; 110 111 if (ndev != dev && ieee80211_sdata_running(nsdata)) { 112 /* 113 * Allow only a single IBSS interface to be up at any 114 * time. This is restricted because beacon distribution 115 * cannot work properly if both are in the same IBSS. 116 * 117 * To remove this restriction we'd have to disallow them 118 * from setting the same SSID on different IBSS interfaces 119 * belonging to the same hardware. Then, however, we're 120 * faced with having to adopt two different TSF timers... 121 */ 122 if (iftype == NL80211_IFTYPE_ADHOC && 123 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 124 return -EBUSY; 125 126 /* 127 * The remaining checks are only performed for interfaces 128 * with the same MAC address. 129 */ 130 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) 131 continue; 132 133 /* 134 * check whether it may have the same address 135 */ 136 if (!identical_mac_addr_allowed(iftype, 137 nsdata->vif.type)) 138 return -ENOTUNIQ; 139 140 /* 141 * can only add VLANs to enabled APs 142 */ 143 if (iftype == NL80211_IFTYPE_AP_VLAN && 144 nsdata->vif.type == NL80211_IFTYPE_AP) 145 sdata->bss = &nsdata->u.ap; 146 } 147 } 148 149 return 0; 150 } 151 152 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 153 const int offset) 154 { 155 struct ieee80211_local *local = sdata->local; 156 u32 flags = sdata->u.mntr_flags; 157 158 #define ADJUST(_f, _s) do { \ 159 if (flags & MONITOR_FLAG_##_f) \ 160 local->fif_##_s += offset; \ 161 } while (0) 162 163 ADJUST(FCSFAIL, fcsfail); 164 ADJUST(PLCPFAIL, plcpfail); 165 ADJUST(CONTROL, control); 166 ADJUST(CONTROL, pspoll); 167 ADJUST(OTHER_BSS, other_bss); 168 169 #undef ADJUST 170 } 171 172 /* 173 * NOTE: Be very careful when changing this function, it must NOT return 174 * an error on interface type changes that have been pre-checked, so most 175 * checks should be in ieee80211_check_concurrent_iface. 176 */ 177 static int ieee80211_do_open(struct net_device *dev, bool coming_up) 178 { 179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 180 struct ieee80211_local *local = sdata->local; 181 struct sta_info *sta; 182 u32 changed = 0; 183 int res; 184 u32 hw_reconf_flags = 0; 185 186 switch (sdata->vif.type) { 187 case NL80211_IFTYPE_WDS: 188 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 189 return -ENOLINK; 190 break; 191 case NL80211_IFTYPE_AP_VLAN: 192 if (!sdata->bss) 193 return -ENOLINK; 194 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 195 break; 196 case NL80211_IFTYPE_AP: 197 sdata->bss = &sdata->u.ap; 198 break; 199 case NL80211_IFTYPE_MESH_POINT: 200 case NL80211_IFTYPE_STATION: 201 case NL80211_IFTYPE_MONITOR: 202 case NL80211_IFTYPE_ADHOC: 203 /* no special treatment */ 204 break; 205 case NL80211_IFTYPE_UNSPECIFIED: 206 case NUM_NL80211_IFTYPES: 207 case NL80211_IFTYPE_P2P_CLIENT: 208 case NL80211_IFTYPE_P2P_GO: 209 /* cannot happen */ 210 WARN_ON(1); 211 break; 212 } 213 214 if (local->open_count == 0) { 215 res = drv_start(local); 216 if (res) 217 goto err_del_bss; 218 if (local->ops->napi_poll) 219 napi_enable(&local->napi); 220 /* we're brought up, everything changes */ 221 hw_reconf_flags = ~0; 222 ieee80211_led_radio(local, true); 223 ieee80211_mod_tpt_led_trig(local, 224 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 225 } 226 227 /* 228 * Copy the hopefully now-present MAC address to 229 * this interface, if it has the special null one. 230 */ 231 if (is_zero_ether_addr(dev->dev_addr)) { 232 memcpy(dev->dev_addr, 233 local->hw.wiphy->perm_addr, 234 ETH_ALEN); 235 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 236 237 if (!is_valid_ether_addr(dev->dev_addr)) { 238 if (!local->open_count) 239 drv_stop(local); 240 return -EADDRNOTAVAIL; 241 } 242 } 243 244 switch (sdata->vif.type) { 245 case NL80211_IFTYPE_AP_VLAN: 246 /* no need to tell driver */ 247 break; 248 case NL80211_IFTYPE_MONITOR: 249 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 250 local->cooked_mntrs++; 251 break; 252 } 253 254 /* must be before the call to ieee80211_configure_filter */ 255 local->monitors++; 256 if (local->monitors == 1) { 257 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 258 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 259 } 260 261 ieee80211_adjust_monitor_flags(sdata, 1); 262 ieee80211_configure_filter(local); 263 264 netif_carrier_on(dev); 265 break; 266 default: 267 if (coming_up) { 268 res = drv_add_interface(local, &sdata->vif); 269 if (res) 270 goto err_stop; 271 } 272 273 if (sdata->vif.type == NL80211_IFTYPE_AP) { 274 local->fif_pspoll++; 275 local->fif_probe_req++; 276 277 ieee80211_configure_filter(local); 278 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 279 local->fif_probe_req++; 280 } 281 282 changed |= ieee80211_reset_erp_info(sdata); 283 ieee80211_bss_info_change_notify(sdata, changed); 284 285 if (sdata->vif.type == NL80211_IFTYPE_STATION) 286 netif_carrier_off(dev); 287 else 288 netif_carrier_on(dev); 289 } 290 291 set_bit(SDATA_STATE_RUNNING, &sdata->state); 292 293 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 294 /* Create STA entry for the WDS peer */ 295 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 296 GFP_KERNEL); 297 if (!sta) { 298 res = -ENOMEM; 299 goto err_del_interface; 300 } 301 302 /* no atomic bitop required since STA is not live yet */ 303 set_sta_flag(sta, WLAN_STA_AUTHORIZED); 304 305 res = sta_info_insert(sta); 306 if (res) { 307 /* STA has been freed */ 308 goto err_del_interface; 309 } 310 311 rate_control_rate_init(sta); 312 } 313 314 /* 315 * set_multicast_list will be invoked by the networking core 316 * which will check whether any increments here were done in 317 * error and sync them down to the hardware as filter flags. 318 */ 319 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 320 atomic_inc(&local->iff_allmultis); 321 322 if (sdata->flags & IEEE80211_SDATA_PROMISC) 323 atomic_inc(&local->iff_promiscs); 324 325 mutex_lock(&local->mtx); 326 hw_reconf_flags |= __ieee80211_recalc_idle(local); 327 mutex_unlock(&local->mtx); 328 329 if (coming_up) 330 local->open_count++; 331 332 if (hw_reconf_flags) { 333 ieee80211_hw_config(local, hw_reconf_flags); 334 /* 335 * set default queue parameters so drivers don't 336 * need to initialise the hardware if the hardware 337 * doesn't start up with sane defaults 338 */ 339 ieee80211_set_wmm_default(sdata); 340 } 341 342 ieee80211_recalc_ps(local, -1); 343 344 netif_tx_start_all_queues(dev); 345 346 return 0; 347 err_del_interface: 348 drv_remove_interface(local, &sdata->vif); 349 err_stop: 350 if (!local->open_count) 351 drv_stop(local); 352 err_del_bss: 353 sdata->bss = NULL; 354 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 355 list_del(&sdata->u.vlan.list); 356 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 357 return res; 358 } 359 360 static int ieee80211_open(struct net_device *dev) 361 { 362 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 363 int err; 364 365 /* fail early if user set an invalid address */ 366 if (!is_valid_ether_addr(dev->dev_addr)) 367 return -EADDRNOTAVAIL; 368 369 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 370 if (err) 371 return err; 372 373 return ieee80211_do_open(dev, true); 374 } 375 376 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 377 bool going_down) 378 { 379 struct ieee80211_local *local = sdata->local; 380 unsigned long flags; 381 struct sk_buff *skb, *tmp; 382 u32 hw_reconf_flags = 0; 383 int i; 384 enum nl80211_channel_type orig_ct; 385 386 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 387 388 if (local->scan_sdata == sdata) 389 ieee80211_scan_cancel(local); 390 391 /* 392 * Stop TX on this interface first. 393 */ 394 netif_tx_stop_all_queues(sdata->dev); 395 396 /* 397 * Purge work for this interface. 398 */ 399 ieee80211_work_purge(sdata); 400 401 /* 402 * Remove all stations associated with this interface. 403 * 404 * This must be done before calling ops->remove_interface() 405 * because otherwise we can later invoke ops->sta_notify() 406 * whenever the STAs are removed, and that invalidates driver 407 * assumptions about always getting a vif pointer that is valid 408 * (because if we remove a STA after ops->remove_interface() 409 * the driver will have removed the vif info already!) 410 * 411 * This is relevant only in AP, WDS and mesh modes, since in 412 * all other modes we've already removed all stations when 413 * disconnecting etc. 414 */ 415 sta_info_flush(local, sdata); 416 417 /* 418 * Don't count this interface for promisc/allmulti while it 419 * is down. dev_mc_unsync() will invoke set_multicast_list 420 * on the master interface which will sync these down to the 421 * hardware as filter flags. 422 */ 423 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 424 atomic_dec(&local->iff_allmultis); 425 426 if (sdata->flags & IEEE80211_SDATA_PROMISC) 427 atomic_dec(&local->iff_promiscs); 428 429 if (sdata->vif.type == NL80211_IFTYPE_AP) { 430 local->fif_pspoll--; 431 local->fif_probe_req--; 432 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 433 local->fif_probe_req--; 434 } 435 436 netif_addr_lock_bh(sdata->dev); 437 spin_lock_bh(&local->filter_lock); 438 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 439 sdata->dev->addr_len); 440 spin_unlock_bh(&local->filter_lock); 441 netif_addr_unlock_bh(sdata->dev); 442 443 ieee80211_configure_filter(local); 444 445 del_timer_sync(&local->dynamic_ps_timer); 446 cancel_work_sync(&local->dynamic_ps_enable_work); 447 448 /* APs need special treatment */ 449 if (sdata->vif.type == NL80211_IFTYPE_AP) { 450 struct ieee80211_sub_if_data *vlan, *tmpsdata; 451 struct beacon_data *old_beacon = 452 rtnl_dereference(sdata->u.ap.beacon); 453 454 /* sdata_running will return false, so this will disable */ 455 ieee80211_bss_info_change_notify(sdata, 456 BSS_CHANGED_BEACON_ENABLED); 457 458 /* remove beacon */ 459 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL); 460 synchronize_rcu(); 461 kfree(old_beacon); 462 463 /* down all dependent devices, that is VLANs */ 464 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 465 u.vlan.list) 466 dev_close(vlan->dev); 467 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 468 469 /* free all potentially still buffered bcast frames */ 470 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf); 471 skb_queue_purge(&sdata->u.ap.ps_bc_buf); 472 } 473 474 if (going_down) 475 local->open_count--; 476 477 switch (sdata->vif.type) { 478 case NL80211_IFTYPE_AP_VLAN: 479 list_del(&sdata->u.vlan.list); 480 /* no need to tell driver */ 481 break; 482 case NL80211_IFTYPE_MONITOR: 483 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 484 local->cooked_mntrs--; 485 break; 486 } 487 488 local->monitors--; 489 if (local->monitors == 0) { 490 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 491 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 492 } 493 494 ieee80211_adjust_monitor_flags(sdata, -1); 495 ieee80211_configure_filter(local); 496 break; 497 default: 498 flush_work(&sdata->work); 499 /* 500 * When we get here, the interface is marked down. 501 * Call synchronize_rcu() to wait for the RX path 502 * should it be using the interface and enqueuing 503 * frames at this very time on another CPU. 504 */ 505 synchronize_rcu(); 506 skb_queue_purge(&sdata->skb_queue); 507 508 /* 509 * Disable beaconing here for mesh only, AP and IBSS 510 * are already taken care of. 511 */ 512 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 513 ieee80211_bss_info_change_notify(sdata, 514 BSS_CHANGED_BEACON_ENABLED); 515 516 /* 517 * Free all remaining keys, there shouldn't be any, 518 * except maybe group keys in AP more or WDS? 519 */ 520 ieee80211_free_keys(sdata); 521 522 if (going_down) 523 drv_remove_interface(local, &sdata->vif); 524 } 525 526 sdata->bss = NULL; 527 528 mutex_lock(&local->mtx); 529 hw_reconf_flags |= __ieee80211_recalc_idle(local); 530 mutex_unlock(&local->mtx); 531 532 ieee80211_recalc_ps(local, -1); 533 534 if (local->open_count == 0) { 535 if (local->ops->napi_poll) 536 napi_disable(&local->napi); 537 ieee80211_clear_tx_pending(local); 538 ieee80211_stop_device(local); 539 540 /* no reconfiguring after stop! */ 541 hw_reconf_flags = 0; 542 } 543 544 /* Re-calculate channel-type, in case there are multiple vifs 545 * on different channel types. 546 */ 547 orig_ct = local->_oper_channel_type; 548 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 549 550 /* do after stop to avoid reconfiguring when we stop anyway */ 551 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 552 ieee80211_hw_config(local, hw_reconf_flags); 553 554 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 555 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 556 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 557 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 558 if (info->control.vif == &sdata->vif) { 559 __skb_unlink(skb, &local->pending[i]); 560 dev_kfree_skb_irq(skb); 561 } 562 } 563 } 564 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 565 } 566 567 static int ieee80211_stop(struct net_device *dev) 568 { 569 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 570 571 ieee80211_do_stop(sdata, true); 572 573 return 0; 574 } 575 576 static void ieee80211_set_multicast_list(struct net_device *dev) 577 { 578 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 579 struct ieee80211_local *local = sdata->local; 580 int allmulti, promisc, sdata_allmulti, sdata_promisc; 581 582 allmulti = !!(dev->flags & IFF_ALLMULTI); 583 promisc = !!(dev->flags & IFF_PROMISC); 584 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 585 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 586 587 if (allmulti != sdata_allmulti) { 588 if (dev->flags & IFF_ALLMULTI) 589 atomic_inc(&local->iff_allmultis); 590 else 591 atomic_dec(&local->iff_allmultis); 592 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 593 } 594 595 if (promisc != sdata_promisc) { 596 if (dev->flags & IFF_PROMISC) 597 atomic_inc(&local->iff_promiscs); 598 else 599 atomic_dec(&local->iff_promiscs); 600 sdata->flags ^= IEEE80211_SDATA_PROMISC; 601 } 602 spin_lock_bh(&local->filter_lock); 603 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 604 spin_unlock_bh(&local->filter_lock); 605 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 606 } 607 608 /* 609 * Called when the netdev is removed or, by the code below, before 610 * the interface type changes. 611 */ 612 static void ieee80211_teardown_sdata(struct net_device *dev) 613 { 614 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 615 struct ieee80211_local *local = sdata->local; 616 int flushed; 617 int i; 618 619 /* free extra data */ 620 ieee80211_free_keys(sdata); 621 622 ieee80211_debugfs_remove_netdev(sdata); 623 624 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 625 __skb_queue_purge(&sdata->fragments[i].skb_list); 626 sdata->fragment_next = 0; 627 628 if (ieee80211_vif_is_mesh(&sdata->vif)) 629 mesh_rmc_free(sdata); 630 631 flushed = sta_info_flush(local, sdata); 632 WARN_ON(flushed); 633 } 634 635 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 636 struct sk_buff *skb) 637 { 638 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 639 } 640 641 static const struct net_device_ops ieee80211_dataif_ops = { 642 .ndo_open = ieee80211_open, 643 .ndo_stop = ieee80211_stop, 644 .ndo_uninit = ieee80211_teardown_sdata, 645 .ndo_start_xmit = ieee80211_subif_start_xmit, 646 .ndo_set_rx_mode = ieee80211_set_multicast_list, 647 .ndo_change_mtu = ieee80211_change_mtu, 648 .ndo_set_mac_address = ieee80211_change_mac, 649 .ndo_select_queue = ieee80211_netdev_select_queue, 650 }; 651 652 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 653 struct sk_buff *skb) 654 { 655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 656 struct ieee80211_local *local = sdata->local; 657 struct ieee80211_hdr *hdr; 658 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 659 u8 *p; 660 661 if (local->hw.queues < 4) 662 return 0; 663 664 if (skb->len < 4 || 665 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 666 return 0; /* doesn't matter, frame will be dropped */ 667 668 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 669 670 if (!ieee80211_is_data(hdr->frame_control)) { 671 skb->priority = 7; 672 return ieee802_1d_to_ac[skb->priority]; 673 } 674 if (!ieee80211_is_data_qos(hdr->frame_control)) { 675 skb->priority = 0; 676 return ieee802_1d_to_ac[skb->priority]; 677 } 678 679 p = ieee80211_get_qos_ctl(hdr); 680 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; 681 682 return ieee80211_downgrade_queue(local, skb); 683 } 684 685 static const struct net_device_ops ieee80211_monitorif_ops = { 686 .ndo_open = ieee80211_open, 687 .ndo_stop = ieee80211_stop, 688 .ndo_uninit = ieee80211_teardown_sdata, 689 .ndo_start_xmit = ieee80211_monitor_start_xmit, 690 .ndo_set_rx_mode = ieee80211_set_multicast_list, 691 .ndo_change_mtu = ieee80211_change_mtu, 692 .ndo_set_mac_address = eth_mac_addr, 693 .ndo_select_queue = ieee80211_monitor_select_queue, 694 }; 695 696 static void ieee80211_if_setup(struct net_device *dev) 697 { 698 ether_setup(dev); 699 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 700 dev->netdev_ops = &ieee80211_dataif_ops; 701 dev->destructor = free_netdev; 702 } 703 704 static void ieee80211_iface_work(struct work_struct *work) 705 { 706 struct ieee80211_sub_if_data *sdata = 707 container_of(work, struct ieee80211_sub_if_data, work); 708 struct ieee80211_local *local = sdata->local; 709 struct sk_buff *skb; 710 struct sta_info *sta; 711 struct ieee80211_ra_tid *ra_tid; 712 713 if (!ieee80211_sdata_running(sdata)) 714 return; 715 716 if (local->scanning) 717 return; 718 719 /* 720 * ieee80211_queue_work() should have picked up most cases, 721 * here we'll pick the rest. 722 */ 723 if (WARN(local->suspended, 724 "interface work scheduled while going to suspend\n")) 725 return; 726 727 /* first process frames */ 728 while ((skb = skb_dequeue(&sdata->skb_queue))) { 729 struct ieee80211_mgmt *mgmt = (void *)skb->data; 730 731 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 732 ra_tid = (void *)&skb->cb; 733 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 734 ra_tid->tid); 735 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 736 ra_tid = (void *)&skb->cb; 737 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 738 ra_tid->tid); 739 } else if (ieee80211_is_action(mgmt->frame_control) && 740 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 741 int len = skb->len; 742 743 mutex_lock(&local->sta_mtx); 744 sta = sta_info_get_bss(sdata, mgmt->sa); 745 if (sta) { 746 switch (mgmt->u.action.u.addba_req.action_code) { 747 case WLAN_ACTION_ADDBA_REQ: 748 ieee80211_process_addba_request( 749 local, sta, mgmt, len); 750 break; 751 case WLAN_ACTION_ADDBA_RESP: 752 ieee80211_process_addba_resp(local, sta, 753 mgmt, len); 754 break; 755 case WLAN_ACTION_DELBA: 756 ieee80211_process_delba(sdata, sta, 757 mgmt, len); 758 break; 759 default: 760 WARN_ON(1); 761 break; 762 } 763 } 764 mutex_unlock(&local->sta_mtx); 765 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 766 struct ieee80211_hdr *hdr = (void *)mgmt; 767 /* 768 * So the frame isn't mgmt, but frame_control 769 * is at the right place anyway, of course, so 770 * the if statement is correct. 771 * 772 * Warn if we have other data frame types here, 773 * they must not get here. 774 */ 775 WARN_ON(hdr->frame_control & 776 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 777 WARN_ON(!(hdr->seq_ctrl & 778 cpu_to_le16(IEEE80211_SCTL_FRAG))); 779 /* 780 * This was a fragment of a frame, received while 781 * a block-ack session was active. That cannot be 782 * right, so terminate the session. 783 */ 784 mutex_lock(&local->sta_mtx); 785 sta = sta_info_get_bss(sdata, mgmt->sa); 786 if (sta) { 787 u16 tid = *ieee80211_get_qos_ctl(hdr) & 788 IEEE80211_QOS_CTL_TID_MASK; 789 790 __ieee80211_stop_rx_ba_session( 791 sta, tid, WLAN_BACK_RECIPIENT, 792 WLAN_REASON_QSTA_REQUIRE_SETUP, 793 true); 794 } 795 mutex_unlock(&local->sta_mtx); 796 } else switch (sdata->vif.type) { 797 case NL80211_IFTYPE_STATION: 798 ieee80211_sta_rx_queued_mgmt(sdata, skb); 799 break; 800 case NL80211_IFTYPE_ADHOC: 801 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 802 break; 803 case NL80211_IFTYPE_MESH_POINT: 804 if (!ieee80211_vif_is_mesh(&sdata->vif)) 805 break; 806 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 807 break; 808 default: 809 WARN(1, "frame for unexpected interface type"); 810 break; 811 } 812 813 kfree_skb(skb); 814 } 815 816 /* then other type-dependent work */ 817 switch (sdata->vif.type) { 818 case NL80211_IFTYPE_STATION: 819 ieee80211_sta_work(sdata); 820 break; 821 case NL80211_IFTYPE_ADHOC: 822 ieee80211_ibss_work(sdata); 823 break; 824 case NL80211_IFTYPE_MESH_POINT: 825 if (!ieee80211_vif_is_mesh(&sdata->vif)) 826 break; 827 ieee80211_mesh_work(sdata); 828 break; 829 default: 830 break; 831 } 832 } 833 834 835 /* 836 * Helper function to initialise an interface to a specific type. 837 */ 838 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 839 enum nl80211_iftype type) 840 { 841 /* clear type-dependent union */ 842 memset(&sdata->u, 0, sizeof(sdata->u)); 843 844 /* and set some type-dependent values */ 845 sdata->vif.type = type; 846 sdata->vif.p2p = false; 847 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 848 sdata->wdev.iftype = type; 849 850 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 851 sdata->control_port_no_encrypt = false; 852 853 /* only monitor differs */ 854 sdata->dev->type = ARPHRD_ETHER; 855 856 skb_queue_head_init(&sdata->skb_queue); 857 INIT_WORK(&sdata->work, ieee80211_iface_work); 858 859 switch (type) { 860 case NL80211_IFTYPE_P2P_GO: 861 type = NL80211_IFTYPE_AP; 862 sdata->vif.type = type; 863 sdata->vif.p2p = true; 864 /* fall through */ 865 case NL80211_IFTYPE_AP: 866 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 867 INIT_LIST_HEAD(&sdata->u.ap.vlans); 868 break; 869 case NL80211_IFTYPE_P2P_CLIENT: 870 type = NL80211_IFTYPE_STATION; 871 sdata->vif.type = type; 872 sdata->vif.p2p = true; 873 /* fall through */ 874 case NL80211_IFTYPE_STATION: 875 ieee80211_sta_setup_sdata(sdata); 876 break; 877 case NL80211_IFTYPE_ADHOC: 878 ieee80211_ibss_setup_sdata(sdata); 879 break; 880 case NL80211_IFTYPE_MESH_POINT: 881 if (ieee80211_vif_is_mesh(&sdata->vif)) 882 ieee80211_mesh_init_sdata(sdata); 883 break; 884 case NL80211_IFTYPE_MONITOR: 885 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 886 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 887 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 888 MONITOR_FLAG_OTHER_BSS; 889 break; 890 case NL80211_IFTYPE_WDS: 891 case NL80211_IFTYPE_AP_VLAN: 892 break; 893 case NL80211_IFTYPE_UNSPECIFIED: 894 case NUM_NL80211_IFTYPES: 895 BUG(); 896 break; 897 } 898 899 ieee80211_debugfs_add_netdev(sdata); 900 } 901 902 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 903 enum nl80211_iftype type) 904 { 905 struct ieee80211_local *local = sdata->local; 906 int ret, err; 907 enum nl80211_iftype internal_type = type; 908 bool p2p = false; 909 910 ASSERT_RTNL(); 911 912 if (!local->ops->change_interface) 913 return -EBUSY; 914 915 switch (sdata->vif.type) { 916 case NL80211_IFTYPE_AP: 917 case NL80211_IFTYPE_STATION: 918 case NL80211_IFTYPE_ADHOC: 919 /* 920 * Could maybe also all others here? 921 * Just not sure how that interacts 922 * with the RX/config path e.g. for 923 * mesh. 924 */ 925 break; 926 default: 927 return -EBUSY; 928 } 929 930 switch (type) { 931 case NL80211_IFTYPE_AP: 932 case NL80211_IFTYPE_STATION: 933 case NL80211_IFTYPE_ADHOC: 934 /* 935 * Could probably support everything 936 * but WDS here (WDS do_open can fail 937 * under memory pressure, which this 938 * code isn't prepared to handle). 939 */ 940 break; 941 case NL80211_IFTYPE_P2P_CLIENT: 942 p2p = true; 943 internal_type = NL80211_IFTYPE_STATION; 944 break; 945 case NL80211_IFTYPE_P2P_GO: 946 p2p = true; 947 internal_type = NL80211_IFTYPE_AP; 948 break; 949 default: 950 return -EBUSY; 951 } 952 953 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 954 if (ret) 955 return ret; 956 957 ieee80211_do_stop(sdata, false); 958 959 ieee80211_teardown_sdata(sdata->dev); 960 961 ret = drv_change_interface(local, sdata, internal_type, p2p); 962 if (ret) 963 type = sdata->vif.type; 964 965 ieee80211_setup_sdata(sdata, type); 966 967 err = ieee80211_do_open(sdata->dev, false); 968 WARN(err, "type change: do_open returned %d", err); 969 970 return ret; 971 } 972 973 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 974 enum nl80211_iftype type) 975 { 976 int ret; 977 978 ASSERT_RTNL(); 979 980 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 981 return 0; 982 983 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 984 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 985 type == NL80211_IFTYPE_ADHOC) 986 return -EOPNOTSUPP; 987 988 if (ieee80211_sdata_running(sdata)) { 989 ret = ieee80211_runtime_change_iftype(sdata, type); 990 if (ret) 991 return ret; 992 } else { 993 /* Purge and reset type-dependent state. */ 994 ieee80211_teardown_sdata(sdata->dev); 995 ieee80211_setup_sdata(sdata, type); 996 } 997 998 /* reset some values that shouldn't be kept across type changes */ 999 sdata->vif.bss_conf.basic_rates = 1000 ieee80211_mandatory_rates(sdata->local, 1001 sdata->local->hw.conf.channel->band); 1002 sdata->drop_unencrypted = 0; 1003 if (type == NL80211_IFTYPE_STATION) 1004 sdata->u.mgd.use_4addr = false; 1005 1006 return 0; 1007 } 1008 1009 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1010 struct net_device *dev, 1011 enum nl80211_iftype type) 1012 { 1013 struct ieee80211_sub_if_data *sdata; 1014 u64 mask, start, addr, val, inc; 1015 u8 *m; 1016 u8 tmp_addr[ETH_ALEN]; 1017 int i; 1018 1019 /* default ... something at least */ 1020 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1021 1022 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1023 local->hw.wiphy->n_addresses <= 1) 1024 return; 1025 1026 1027 mutex_lock(&local->iflist_mtx); 1028 1029 switch (type) { 1030 case NL80211_IFTYPE_MONITOR: 1031 /* doesn't matter */ 1032 break; 1033 case NL80211_IFTYPE_WDS: 1034 case NL80211_IFTYPE_AP_VLAN: 1035 /* match up with an AP interface */ 1036 list_for_each_entry(sdata, &local->interfaces, list) { 1037 if (sdata->vif.type != NL80211_IFTYPE_AP) 1038 continue; 1039 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1040 break; 1041 } 1042 /* keep default if no AP interface present */ 1043 break; 1044 default: 1045 /* assign a new address if possible -- try n_addresses first */ 1046 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1047 bool used = false; 1048 1049 list_for_each_entry(sdata, &local->interfaces, list) { 1050 if (memcmp(local->hw.wiphy->addresses[i].addr, 1051 sdata->vif.addr, ETH_ALEN) == 0) { 1052 used = true; 1053 break; 1054 } 1055 } 1056 1057 if (!used) { 1058 memcpy(dev->perm_addr, 1059 local->hw.wiphy->addresses[i].addr, 1060 ETH_ALEN); 1061 break; 1062 } 1063 } 1064 1065 /* try mask if available */ 1066 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1067 break; 1068 1069 m = local->hw.wiphy->addr_mask; 1070 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1071 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1072 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1073 1074 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1075 /* not a contiguous mask ... not handled now! */ 1076 printk(KERN_DEBUG "not contiguous\n"); 1077 break; 1078 } 1079 1080 m = local->hw.wiphy->perm_addr; 1081 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1082 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1083 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1084 1085 inc = 1ULL<<__ffs64(mask); 1086 val = (start & mask); 1087 addr = (start & ~mask) | (val & mask); 1088 do { 1089 bool used = false; 1090 1091 tmp_addr[5] = addr >> 0*8; 1092 tmp_addr[4] = addr >> 1*8; 1093 tmp_addr[3] = addr >> 2*8; 1094 tmp_addr[2] = addr >> 3*8; 1095 tmp_addr[1] = addr >> 4*8; 1096 tmp_addr[0] = addr >> 5*8; 1097 1098 val += inc; 1099 1100 list_for_each_entry(sdata, &local->interfaces, list) { 1101 if (memcmp(tmp_addr, sdata->vif.addr, 1102 ETH_ALEN) == 0) { 1103 used = true; 1104 break; 1105 } 1106 } 1107 1108 if (!used) { 1109 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1110 break; 1111 } 1112 addr = (start & ~mask) | (val & mask); 1113 } while (addr != start); 1114 1115 break; 1116 } 1117 1118 mutex_unlock(&local->iflist_mtx); 1119 } 1120 1121 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1122 struct net_device **new_dev, enum nl80211_iftype type, 1123 struct vif_params *params) 1124 { 1125 struct net_device *ndev; 1126 struct ieee80211_sub_if_data *sdata = NULL; 1127 int ret, i; 1128 1129 ASSERT_RTNL(); 1130 1131 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size, 1132 name, ieee80211_if_setup, local->hw.queues, 1); 1133 if (!ndev) 1134 return -ENOMEM; 1135 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1136 1137 ndev->needed_headroom = local->tx_headroom + 1138 4*6 /* four MAC addresses */ 1139 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1140 + 6 /* mesh */ 1141 + 8 /* rfc1042/bridge tunnel */ 1142 - ETH_HLEN /* ethernet hard_header_len */ 1143 + IEEE80211_ENCRYPT_HEADROOM; 1144 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1145 1146 ret = dev_alloc_name(ndev, ndev->name); 1147 if (ret < 0) 1148 goto fail; 1149 1150 ieee80211_assign_perm_addr(local, ndev, type); 1151 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1152 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1153 1154 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1155 sdata = netdev_priv(ndev); 1156 ndev->ieee80211_ptr = &sdata->wdev; 1157 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1158 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1159 1160 /* initialise type-independent data */ 1161 sdata->wdev.wiphy = local->hw.wiphy; 1162 sdata->local = local; 1163 sdata->dev = ndev; 1164 #ifdef CONFIG_INET 1165 sdata->arp_filter_state = true; 1166 #endif 1167 1168 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1169 skb_queue_head_init(&sdata->fragments[i].skb_list); 1170 1171 INIT_LIST_HEAD(&sdata->key_list); 1172 1173 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1174 struct ieee80211_supported_band *sband; 1175 sband = local->hw.wiphy->bands[i]; 1176 sdata->rc_rateidx_mask[i] = 1177 sband ? (1 << sband->n_bitrates) - 1 : 0; 1178 } 1179 1180 /* setup type-dependent data */ 1181 ieee80211_setup_sdata(sdata, type); 1182 1183 if (params) { 1184 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1185 if (type == NL80211_IFTYPE_STATION) 1186 sdata->u.mgd.use_4addr = params->use_4addr; 1187 } 1188 1189 ret = register_netdevice(ndev); 1190 if (ret) 1191 goto fail; 1192 1193 mutex_lock(&local->iflist_mtx); 1194 list_add_tail_rcu(&sdata->list, &local->interfaces); 1195 mutex_unlock(&local->iflist_mtx); 1196 1197 if (new_dev) 1198 *new_dev = ndev; 1199 1200 return 0; 1201 1202 fail: 1203 free_netdev(ndev); 1204 return ret; 1205 } 1206 1207 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1208 { 1209 ASSERT_RTNL(); 1210 1211 mutex_lock(&sdata->local->iflist_mtx); 1212 list_del_rcu(&sdata->list); 1213 mutex_unlock(&sdata->local->iflist_mtx); 1214 1215 if (ieee80211_vif_is_mesh(&sdata->vif)) 1216 mesh_path_flush_by_iface(sdata); 1217 1218 synchronize_rcu(); 1219 unregister_netdevice(sdata->dev); 1220 } 1221 1222 /* 1223 * Remove all interfaces, may only be called at hardware unregistration 1224 * time because it doesn't do RCU-safe list removals. 1225 */ 1226 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1227 { 1228 struct ieee80211_sub_if_data *sdata, *tmp; 1229 LIST_HEAD(unreg_list); 1230 1231 ASSERT_RTNL(); 1232 1233 mutex_lock(&local->iflist_mtx); 1234 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1235 list_del(&sdata->list); 1236 1237 if (ieee80211_vif_is_mesh(&sdata->vif)) 1238 mesh_path_flush_by_iface(sdata); 1239 1240 unregister_netdevice_queue(sdata->dev, &unreg_list); 1241 } 1242 mutex_unlock(&local->iflist_mtx); 1243 unregister_netdevice_many(&unreg_list); 1244 list_del(&unreg_list); 1245 } 1246 1247 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1248 const char *reason) 1249 { 1250 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1251 return 0; 1252 1253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1254 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1255 #endif 1256 1257 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1258 return IEEE80211_CONF_CHANGE_IDLE; 1259 } 1260 1261 static u32 ieee80211_idle_on(struct ieee80211_local *local) 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 now idle\n"); 1268 #endif 1269 1270 drv_flush(local, false); 1271 1272 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1273 return IEEE80211_CONF_CHANGE_IDLE; 1274 } 1275 1276 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1277 { 1278 struct ieee80211_sub_if_data *sdata; 1279 int count = 0; 1280 bool working = false, scanning = false, hw_roc = false; 1281 struct ieee80211_work *wk; 1282 unsigned int led_trig_start = 0, led_trig_stop = 0; 1283 1284 #ifdef CONFIG_PROVE_LOCKING 1285 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1286 !lockdep_is_held(&local->iflist_mtx)); 1287 #endif 1288 lockdep_assert_held(&local->mtx); 1289 1290 list_for_each_entry(sdata, &local->interfaces, list) { 1291 if (!ieee80211_sdata_running(sdata)) { 1292 sdata->vif.bss_conf.idle = true; 1293 continue; 1294 } 1295 1296 sdata->old_idle = sdata->vif.bss_conf.idle; 1297 1298 /* do not count disabled managed interfaces */ 1299 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1300 !sdata->u.mgd.associated) { 1301 sdata->vif.bss_conf.idle = true; 1302 continue; 1303 } 1304 /* do not count unused IBSS interfaces */ 1305 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1306 !sdata->u.ibss.ssid_len) { 1307 sdata->vif.bss_conf.idle = true; 1308 continue; 1309 } 1310 /* count everything else */ 1311 count++; 1312 } 1313 1314 list_for_each_entry(wk, &local->work_list, list) { 1315 working = true; 1316 wk->sdata->vif.bss_conf.idle = false; 1317 } 1318 1319 if (local->scan_sdata) { 1320 scanning = true; 1321 local->scan_sdata->vif.bss_conf.idle = false; 1322 } 1323 1324 if (local->hw_roc_channel) 1325 hw_roc = true; 1326 1327 list_for_each_entry(sdata, &local->interfaces, list) { 1328 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1329 continue; 1330 if (!ieee80211_sdata_running(sdata)) 1331 continue; 1332 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1333 } 1334 1335 if (working || scanning || hw_roc) 1336 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1337 else 1338 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1339 1340 if (count) 1341 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1342 else 1343 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1344 1345 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1346 1347 if (hw_roc) 1348 return ieee80211_idle_off(local, "hw remain-on-channel"); 1349 if (working) 1350 return ieee80211_idle_off(local, "working"); 1351 if (scanning) 1352 return ieee80211_idle_off(local, "scanning"); 1353 if (!count) 1354 return ieee80211_idle_on(local); 1355 else 1356 return ieee80211_idle_off(local, "in use"); 1357 1358 return 0; 1359 } 1360 1361 void ieee80211_recalc_idle(struct ieee80211_local *local) 1362 { 1363 u32 chg; 1364 1365 mutex_lock(&local->iflist_mtx); 1366 chg = __ieee80211_recalc_idle(local); 1367 mutex_unlock(&local->iflist_mtx); 1368 if (chg) 1369 ieee80211_hw_config(local, chg); 1370 } 1371 1372 static int netdev_notify(struct notifier_block *nb, 1373 unsigned long state, 1374 void *ndev) 1375 { 1376 struct net_device *dev = ndev; 1377 struct ieee80211_sub_if_data *sdata; 1378 1379 if (state != NETDEV_CHANGENAME) 1380 return 0; 1381 1382 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1383 return 0; 1384 1385 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1386 return 0; 1387 1388 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1389 1390 memcpy(sdata->name, dev->name, IFNAMSIZ); 1391 1392 ieee80211_debugfs_rename_netdev(sdata); 1393 return 0; 1394 } 1395 1396 static struct notifier_block mac80211_netdev_notifier = { 1397 .notifier_call = netdev_notify, 1398 }; 1399 1400 int ieee80211_iface_init(void) 1401 { 1402 return register_netdevice_notifier(&mac80211_netdev_notifier); 1403 } 1404 1405 void ieee80211_iface_exit(void) 1406 { 1407 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1408 } 1409