main.c revision f59ac0481660e66cec67f1d6b024e78b9dc715fe
1/* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <net/mac80211.h> 12#include <net/ieee80211_radiotap.h> 13#include <linux/module.h> 14#include <linux/init.h> 15#include <linux/netdevice.h> 16#include <linux/types.h> 17#include <linux/slab.h> 18#include <linux/skbuff.h> 19#include <linux/etherdevice.h> 20#include <linux/if_arp.h> 21#include <linux/wireless.h> 22#include <linux/rtnetlink.h> 23#include <linux/bitmap.h> 24#include <net/net_namespace.h> 25#include <net/cfg80211.h> 26 27#include "ieee80211_i.h" 28#include "rate.h" 29#include "mesh.h" 30#include "wep.h" 31#include "wme.h" 32#include "aes_ccm.h" 33#include "led.h" 34#include "cfg.h" 35#include "debugfs.h" 36#include "debugfs_netdev.h" 37 38/* 39 * For seeing transmitted packets on monitor interfaces 40 * we have a radiotap header too. 41 */ 42struct ieee80211_tx_status_rtap_hdr { 43 struct ieee80211_radiotap_header hdr; 44 __le16 tx_flags; 45 u8 data_retries; 46} __attribute__ ((packed)); 47 48/* common interface routines */ 49 50static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) 51{ 52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ 53 return ETH_ALEN; 54} 55 56/* must be called under mdev tx lock */ 57static void ieee80211_configure_filter(struct ieee80211_local *local) 58{ 59 unsigned int changed_flags; 60 unsigned int new_flags = 0; 61 62 if (atomic_read(&local->iff_promiscs)) 63 new_flags |= FIF_PROMISC_IN_BSS; 64 65 if (atomic_read(&local->iff_allmultis)) 66 new_flags |= FIF_ALLMULTI; 67 68 if (local->monitors) 69 new_flags |= FIF_BCN_PRBRESP_PROMISC; 70 71 if (local->fif_fcsfail) 72 new_flags |= FIF_FCSFAIL; 73 74 if (local->fif_plcpfail) 75 new_flags |= FIF_PLCPFAIL; 76 77 if (local->fif_control) 78 new_flags |= FIF_CONTROL; 79 80 if (local->fif_other_bss) 81 new_flags |= FIF_OTHER_BSS; 82 83 changed_flags = local->filter_flags ^ new_flags; 84 85 /* be a bit nasty */ 86 new_flags |= (1<<31); 87 88 local->ops->configure_filter(local_to_hw(local), 89 changed_flags, &new_flags, 90 local->mdev->mc_count, 91 local->mdev->mc_list); 92 93 WARN_ON(new_flags & (1<<31)); 94 95 local->filter_flags = new_flags & ~(1<<31); 96} 97 98/* master interface */ 99 100static int ieee80211_master_open(struct net_device *dev) 101{ 102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 103 struct ieee80211_sub_if_data *sdata; 104 int res = -EOPNOTSUPP; 105 106 /* we hold the RTNL here so can safely walk the list */ 107 list_for_each_entry(sdata, &local->interfaces, list) { 108 if (netif_running(sdata->dev)) { 109 res = 0; 110 break; 111 } 112 } 113 114 if (res) 115 return res; 116 117 netif_tx_start_all_queues(local->mdev); 118 119 return 0; 120} 121 122static int ieee80211_master_stop(struct net_device *dev) 123{ 124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 125 struct ieee80211_sub_if_data *sdata; 126 127 /* we hold the RTNL here so can safely walk the list */ 128 list_for_each_entry(sdata, &local->interfaces, list) 129 if (netif_running(sdata->dev)) 130 dev_close(sdata->dev); 131 132 return 0; 133} 134 135static void ieee80211_master_set_multicast_list(struct net_device *dev) 136{ 137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 138 139 ieee80211_configure_filter(local); 140} 141 142/* regular interfaces */ 143 144static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) 145{ 146 int meshhdrlen; 147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 148 149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0; 150 151 /* FIX: what would be proper limits for MTU? 152 * This interface uses 802.3 frames. */ 153 if (new_mtu < 256 || 154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { 155 return -EINVAL; 156 } 157 158#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); 160#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ 161 dev->mtu = new_mtu; 162 return 0; 163} 164 165static inline int identical_mac_addr_allowed(int type1, int type2) 166{ 167 return (type1 == IEEE80211_IF_TYPE_MNTR || 168 type2 == IEEE80211_IF_TYPE_MNTR || 169 (type1 == IEEE80211_IF_TYPE_AP && 170 type2 == IEEE80211_IF_TYPE_WDS) || 171 (type1 == IEEE80211_IF_TYPE_WDS && 172 (type2 == IEEE80211_IF_TYPE_WDS || 173 type2 == IEEE80211_IF_TYPE_AP)) || 174 (type1 == IEEE80211_IF_TYPE_AP && 175 type2 == IEEE80211_IF_TYPE_VLAN) || 176 (type1 == IEEE80211_IF_TYPE_VLAN && 177 (type2 == IEEE80211_IF_TYPE_AP || 178 type2 == IEEE80211_IF_TYPE_VLAN))); 179} 180 181static int ieee80211_open(struct net_device *dev) 182{ 183 struct ieee80211_sub_if_data *sdata, *nsdata; 184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 185 struct sta_info *sta; 186 struct ieee80211_if_init_conf conf; 187 u32 changed = 0; 188 int res; 189 bool need_hw_reconfig = 0; 190 u8 null_addr[ETH_ALEN] = {0}; 191 192 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 193 194 /* fail early if user set an invalid address */ 195 if (compare_ether_addr(dev->dev_addr, null_addr) && 196 !is_valid_ether_addr(dev->dev_addr)) 197 return -EADDRNOTAVAIL; 198 199 /* we hold the RTNL here so can safely walk the list */ 200 list_for_each_entry(nsdata, &local->interfaces, list) { 201 struct net_device *ndev = nsdata->dev; 202 203 if (ndev != dev && netif_running(ndev)) { 204 /* 205 * Allow only a single IBSS interface to be up at any 206 * time. This is restricted because beacon distribution 207 * cannot work properly if both are in the same IBSS. 208 * 209 * To remove this restriction we'd have to disallow them 210 * from setting the same SSID on different IBSS interfaces 211 * belonging to the same hardware. Then, however, we're 212 * faced with having to adopt two different TSF timers... 213 */ 214 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && 215 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) 216 return -EBUSY; 217 218 /* 219 * The remaining checks are only performed for interfaces 220 * with the same MAC address. 221 */ 222 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) 223 continue; 224 225 /* 226 * check whether it may have the same address 227 */ 228 if (!identical_mac_addr_allowed(sdata->vif.type, 229 nsdata->vif.type)) 230 return -ENOTUNIQ; 231 232 /* 233 * can only add VLANs to enabled APs 234 */ 235 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && 236 nsdata->vif.type == IEEE80211_IF_TYPE_AP) 237 sdata->bss = &nsdata->u.ap; 238 } 239 } 240 241 switch (sdata->vif.type) { 242 case IEEE80211_IF_TYPE_WDS: 243 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 244 return -ENOLINK; 245 break; 246 case IEEE80211_IF_TYPE_VLAN: 247 if (!sdata->bss) 248 return -ENOLINK; 249 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 250 break; 251 case IEEE80211_IF_TYPE_AP: 252 sdata->bss = &sdata->u.ap; 253 break; 254 case IEEE80211_IF_TYPE_MESH_POINT: 255 /* mesh ifaces must set allmulti to forward mcast traffic */ 256 atomic_inc(&local->iff_allmultis); 257 break; 258 case IEEE80211_IF_TYPE_STA: 259 case IEEE80211_IF_TYPE_MNTR: 260 case IEEE80211_IF_TYPE_IBSS: 261 /* no special treatment */ 262 break; 263 case IEEE80211_IF_TYPE_INVALID: 264 /* cannot happen */ 265 WARN_ON(1); 266 break; 267 } 268 269 if (local->open_count == 0) { 270 res = 0; 271 if (local->ops->start) 272 res = local->ops->start(local_to_hw(local)); 273 if (res) 274 goto err_del_bss; 275 need_hw_reconfig = 1; 276 ieee80211_led_radio(local, local->hw.conf.radio_enabled); 277 } 278 279 /* 280 * Check all interfaces and copy the hopefully now-present 281 * MAC address to those that have the special null one. 282 */ 283 list_for_each_entry(nsdata, &local->interfaces, list) { 284 struct net_device *ndev = nsdata->dev; 285 286 /* 287 * No need to check netif_running since we do not allow 288 * it to start up with this invalid address. 289 */ 290 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) 291 memcpy(ndev->dev_addr, 292 local->hw.wiphy->perm_addr, 293 ETH_ALEN); 294 } 295 296 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0) 297 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, 298 ETH_ALEN); 299 300 /* 301 * Validate the MAC address for this device. 302 */ 303 if (!is_valid_ether_addr(dev->dev_addr)) { 304 if (!local->open_count && local->ops->stop) 305 local->ops->stop(local_to_hw(local)); 306 return -EADDRNOTAVAIL; 307 } 308 309 switch (sdata->vif.type) { 310 case IEEE80211_IF_TYPE_VLAN: 311 /* no need to tell driver */ 312 break; 313 case IEEE80211_IF_TYPE_MNTR: 314 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 315 local->cooked_mntrs++; 316 break; 317 } 318 319 /* must be before the call to ieee80211_configure_filter */ 320 local->monitors++; 321 if (local->monitors == 1) 322 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; 323 324 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 325 local->fif_fcsfail++; 326 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 327 local->fif_plcpfail++; 328 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 329 local->fif_control++; 330 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 331 local->fif_other_bss++; 332 333 netif_addr_lock_bh(local->mdev); 334 ieee80211_configure_filter(local); 335 netif_addr_unlock_bh(local->mdev); 336 break; 337 case IEEE80211_IF_TYPE_STA: 338 case IEEE80211_IF_TYPE_IBSS: 339 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; 340 /* fall through */ 341 default: 342 conf.vif = &sdata->vif; 343 conf.type = sdata->vif.type; 344 conf.mac_addr = dev->dev_addr; 345 res = local->ops->add_interface(local_to_hw(local), &conf); 346 if (res) 347 goto err_stop; 348 349 if (ieee80211_vif_is_mesh(&sdata->vif)) 350 ieee80211_start_mesh(sdata); 351 changed |= ieee80211_reset_erp_info(sdata); 352 ieee80211_bss_info_change_notify(sdata, changed); 353 ieee80211_enable_keys(sdata); 354 355 if (sdata->vif.type == IEEE80211_IF_TYPE_STA && 356 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) 357 netif_carrier_off(dev); 358 else 359 netif_carrier_on(dev); 360 } 361 362 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { 363 /* Create STA entry for the WDS peer */ 364 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 365 GFP_KERNEL); 366 if (!sta) { 367 res = -ENOMEM; 368 goto err_del_interface; 369 } 370 371 /* no locking required since STA is not live yet */ 372 sta->flags |= WLAN_STA_AUTHORIZED; 373 374 res = sta_info_insert(sta); 375 if (res) { 376 /* STA has been freed */ 377 goto err_del_interface; 378 } 379 } 380 381 if (local->open_count == 0) { 382 res = dev_open(local->mdev); 383 WARN_ON(res); 384 if (res) 385 goto err_del_interface; 386 tasklet_enable(&local->tx_pending_tasklet); 387 tasklet_enable(&local->tasklet); 388 } 389 390 /* 391 * set_multicast_list will be invoked by the networking core 392 * which will check whether any increments here were done in 393 * error and sync them down to the hardware as filter flags. 394 */ 395 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 396 atomic_inc(&local->iff_allmultis); 397 398 if (sdata->flags & IEEE80211_SDATA_PROMISC) 399 atomic_inc(&local->iff_promiscs); 400 401 local->open_count++; 402 if (need_hw_reconfig) 403 ieee80211_hw_config(local); 404 405 /* 406 * ieee80211_sta_work is disabled while network interface 407 * is down. Therefore, some configuration changes may not 408 * yet be effective. Trigger execution of ieee80211_sta_work 409 * to fix this. 410 */ 411 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 412 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 413 struct ieee80211_if_sta *ifsta = &sdata->u.sta; 414 queue_work(local->hw.workqueue, &ifsta->work); 415 } 416 417 netif_tx_start_all_queues(dev); 418 419 return 0; 420 err_del_interface: 421 local->ops->remove_interface(local_to_hw(local), &conf); 422 err_stop: 423 if (!local->open_count && local->ops->stop) 424 local->ops->stop(local_to_hw(local)); 425 err_del_bss: 426 sdata->bss = NULL; 427 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) 428 list_del(&sdata->u.vlan.list); 429 return res; 430} 431 432static int ieee80211_stop(struct net_device *dev) 433{ 434 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 435 struct ieee80211_local *local = sdata->local; 436 struct ieee80211_if_init_conf conf; 437 struct sta_info *sta; 438 439 /* 440 * Stop TX on this interface first. 441 */ 442 netif_tx_stop_all_queues(dev); 443 444 /* 445 * Now delete all active aggregation sessions. 446 */ 447 rcu_read_lock(); 448 449 list_for_each_entry_rcu(sta, &local->sta_list, list) { 450 if (sta->sdata == sdata) 451 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr); 452 } 453 454 rcu_read_unlock(); 455 456 /* 457 * Remove all stations associated with this interface. 458 * 459 * This must be done before calling ops->remove_interface() 460 * because otherwise we can later invoke ops->sta_notify() 461 * whenever the STAs are removed, and that invalidates driver 462 * assumptions about always getting a vif pointer that is valid 463 * (because if we remove a STA after ops->remove_interface() 464 * the driver will have removed the vif info already!) 465 * 466 * We could relax this and only unlink the stations from the 467 * hash table and list but keep them on a per-sdata list that 468 * will be inserted back again when the interface is brought 469 * up again, but I don't currently see a use case for that, 470 * except with WDS which gets a STA entry created when it is 471 * brought up. 472 */ 473 sta_info_flush(local, sdata); 474 475 /* 476 * Don't count this interface for promisc/allmulti while it 477 * is down. dev_mc_unsync() will invoke set_multicast_list 478 * on the master interface which will sync these down to the 479 * hardware as filter flags. 480 */ 481 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 482 atomic_dec(&local->iff_allmultis); 483 484 if (sdata->flags & IEEE80211_SDATA_PROMISC) 485 atomic_dec(&local->iff_promiscs); 486 487 dev_mc_unsync(local->mdev, dev); 488 489 /* APs need special treatment */ 490 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 491 struct ieee80211_sub_if_data *vlan, *tmp; 492 struct beacon_data *old_beacon = sdata->u.ap.beacon; 493 494 /* remove beacon */ 495 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 496 synchronize_rcu(); 497 kfree(old_beacon); 498 499 /* down all dependent devices, that is VLANs */ 500 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, 501 u.vlan.list) 502 dev_close(vlan->dev); 503 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 504 } 505 506 local->open_count--; 507 508 switch (sdata->vif.type) { 509 case IEEE80211_IF_TYPE_VLAN: 510 list_del(&sdata->u.vlan.list); 511 /* no need to tell driver */ 512 break; 513 case IEEE80211_IF_TYPE_MNTR: 514 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 515 local->cooked_mntrs--; 516 break; 517 } 518 519 local->monitors--; 520 if (local->monitors == 0) 521 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; 522 523 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 524 local->fif_fcsfail--; 525 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 526 local->fif_plcpfail--; 527 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 528 local->fif_control--; 529 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 530 local->fif_other_bss--; 531 532 netif_addr_lock_bh(local->mdev); 533 ieee80211_configure_filter(local); 534 netif_addr_unlock_bh(local->mdev); 535 break; 536 case IEEE80211_IF_TYPE_MESH_POINT: 537 /* allmulti is always set on mesh ifaces */ 538 atomic_dec(&local->iff_allmultis); 539 /* fall through */ 540 case IEEE80211_IF_TYPE_STA: 541 case IEEE80211_IF_TYPE_IBSS: 542 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED; 543 memset(sdata->u.sta.bssid, 0, ETH_ALEN); 544 del_timer_sync(&sdata->u.sta.timer); 545 /* 546 * When we get here, the interface is marked down. 547 * Call synchronize_rcu() to wait for the RX path 548 * should it be using the interface and enqueuing 549 * frames at this very time on another CPU. 550 */ 551 synchronize_rcu(); 552 skb_queue_purge(&sdata->u.sta.skb_queue); 553 554 if (local->scan_dev == sdata->dev) { 555 if (!local->ops->hw_scan) { 556 local->sta_sw_scanning = 0; 557 cancel_delayed_work(&local->scan_work); 558 } else 559 local->sta_hw_scanning = 0; 560 } 561 562 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; 563 kfree(sdata->u.sta.extra_ie); 564 sdata->u.sta.extra_ie = NULL; 565 sdata->u.sta.extra_ie_len = 0; 566 /* fall through */ 567 default: 568 conf.vif = &sdata->vif; 569 conf.type = sdata->vif.type; 570 conf.mac_addr = dev->dev_addr; 571 /* disable all keys for as long as this netdev is down */ 572 ieee80211_disable_keys(sdata); 573 local->ops->remove_interface(local_to_hw(local), &conf); 574 } 575 576 sdata->bss = NULL; 577 578 if (local->open_count == 0) { 579 if (netif_running(local->mdev)) 580 dev_close(local->mdev); 581 582 if (local->ops->stop) 583 local->ops->stop(local_to_hw(local)); 584 585 ieee80211_led_radio(local, 0); 586 587 flush_workqueue(local->hw.workqueue); 588 589 tasklet_disable(&local->tx_pending_tasklet); 590 tasklet_disable(&local->tasklet); 591 } 592 593 return 0; 594} 595 596int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) 597{ 598 struct ieee80211_local *local = hw_to_local(hw); 599 struct sta_info *sta; 600 struct ieee80211_sub_if_data *sdata; 601 u16 start_seq_num; 602 u8 *state; 603 int ret; 604 DECLARE_MAC_BUF(mac); 605 606 if (tid >= STA_TID_NUM) 607 return -EINVAL; 608 609#ifdef CONFIG_MAC80211_HT_DEBUG 610 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", 611 print_mac(mac, ra), tid); 612#endif /* CONFIG_MAC80211_HT_DEBUG */ 613 614 rcu_read_lock(); 615 616 sta = sta_info_get(local, ra); 617 if (!sta) { 618#ifdef CONFIG_MAC80211_HT_DEBUG 619 printk(KERN_DEBUG "Could not find the station\n"); 620#endif 621 ret = -ENOENT; 622 goto exit; 623 } 624 625 spin_lock_bh(&sta->lock); 626 627 /* we have tried too many times, receiver does not want A-MPDU */ 628 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { 629 ret = -EBUSY; 630 goto err_unlock_sta; 631 } 632 633 state = &sta->ampdu_mlme.tid_state_tx[tid]; 634 /* check if the TID is not in aggregation flow already */ 635 if (*state != HT_AGG_STATE_IDLE) { 636#ifdef CONFIG_MAC80211_HT_DEBUG 637 printk(KERN_DEBUG "BA request denied - session is not " 638 "idle on tid %u\n", tid); 639#endif /* CONFIG_MAC80211_HT_DEBUG */ 640 ret = -EAGAIN; 641 goto err_unlock_sta; 642 } 643 644 /* prepare A-MPDU MLME for Tx aggregation */ 645 sta->ampdu_mlme.tid_tx[tid] = 646 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); 647 if (!sta->ampdu_mlme.tid_tx[tid]) { 648#ifdef CONFIG_MAC80211_HT_DEBUG 649 if (net_ratelimit()) 650 printk(KERN_ERR "allocate tx mlme to tid %d failed\n", 651 tid); 652#endif 653 ret = -ENOMEM; 654 goto err_unlock_sta; 655 } 656 /* Tx timer */ 657 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = 658 sta_addba_resp_timer_expired; 659 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = 660 (unsigned long)&sta->timer_to_tid[tid]; 661 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 662 663 /* create a new queue for this aggregation */ 664 ret = ieee80211_ht_agg_queue_add(local, sta, tid); 665 666 /* case no queue is available to aggregation 667 * don't switch to aggregation */ 668 if (ret) { 669#ifdef CONFIG_MAC80211_HT_DEBUG 670 printk(KERN_DEBUG "BA request denied - queue unavailable for" 671 " tid %d\n", tid); 672#endif /* CONFIG_MAC80211_HT_DEBUG */ 673 goto err_unlock_queue; 674 } 675 sdata = sta->sdata; 676 677 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the 678 * call back right away, it must see that the flow has begun */ 679 *state |= HT_ADDBA_REQUESTED_MSK; 680 681 /* This is slightly racy because the queue isn't stopped */ 682 start_seq_num = sta->tid_seq[tid]; 683 684 if (local->ops->ampdu_action) 685 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, 686 ra, tid, &start_seq_num); 687 688 if (ret) { 689 /* No need to requeue the packets in the agg queue, since we 690 * held the tx lock: no packet could be enqueued to the newly 691 * allocated queue */ 692 ieee80211_ht_agg_queue_remove(local, sta, tid, 0); 693#ifdef CONFIG_MAC80211_HT_DEBUG 694 printk(KERN_DEBUG "BA request denied - HW unavailable for" 695 " tid %d\n", tid); 696#endif /* CONFIG_MAC80211_HT_DEBUG */ 697 *state = HT_AGG_STATE_IDLE; 698 goto err_unlock_queue; 699 } 700 701 /* Will put all the packets in the new SW queue */ 702 ieee80211_requeue(local, ieee802_1d_to_ac[tid]); 703 spin_unlock_bh(&sta->lock); 704 705 /* send an addBA request */ 706 sta->ampdu_mlme.dialog_token_allocator++; 707 sta->ampdu_mlme.tid_tx[tid]->dialog_token = 708 sta->ampdu_mlme.dialog_token_allocator; 709 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; 710 711 712 ieee80211_send_addba_request(sta->sdata, ra, tid, 713 sta->ampdu_mlme.tid_tx[tid]->dialog_token, 714 sta->ampdu_mlme.tid_tx[tid]->ssn, 715 0x40, 5000); 716 /* activate the timer for the recipient's addBA response */ 717 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = 718 jiffies + ADDBA_RESP_INTERVAL; 719 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 720#ifdef CONFIG_MAC80211_HT_DEBUG 721 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); 722#endif 723 goto exit; 724 725err_unlock_queue: 726 kfree(sta->ampdu_mlme.tid_tx[tid]); 727 sta->ampdu_mlme.tid_tx[tid] = NULL; 728 ret = -EBUSY; 729err_unlock_sta: 730 spin_unlock_bh(&sta->lock); 731exit: 732 rcu_read_unlock(); 733 return ret; 734} 735EXPORT_SYMBOL(ieee80211_start_tx_ba_session); 736 737int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 738 u8 *ra, u16 tid, 739 enum ieee80211_back_parties initiator) 740{ 741 struct ieee80211_local *local = hw_to_local(hw); 742 struct sta_info *sta; 743 u8 *state; 744 int ret = 0; 745 DECLARE_MAC_BUF(mac); 746 747 if (tid >= STA_TID_NUM) 748 return -EINVAL; 749 750 rcu_read_lock(); 751 sta = sta_info_get(local, ra); 752 if (!sta) { 753 rcu_read_unlock(); 754 return -ENOENT; 755 } 756 757 /* check if the TID is in aggregation */ 758 state = &sta->ampdu_mlme.tid_state_tx[tid]; 759 spin_lock_bh(&sta->lock); 760 761 if (*state != HT_AGG_STATE_OPERATIONAL) { 762 ret = -ENOENT; 763 goto stop_BA_exit; 764 } 765 766#ifdef CONFIG_MAC80211_HT_DEBUG 767 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", 768 print_mac(mac, ra), tid); 769#endif /* CONFIG_MAC80211_HT_DEBUG */ 770 771 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); 772 773 *state = HT_AGG_STATE_REQ_STOP_BA_MSK | 774 (initiator << HT_AGG_STATE_INITIATOR_SHIFT); 775 776 if (local->ops->ampdu_action) 777 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, 778 ra, tid, NULL); 779 780 /* case HW denied going back to legacy */ 781 if (ret) { 782 WARN_ON(ret != -EBUSY); 783 *state = HT_AGG_STATE_OPERATIONAL; 784 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 785 goto stop_BA_exit; 786 } 787 788stop_BA_exit: 789 spin_unlock_bh(&sta->lock); 790 rcu_read_unlock(); 791 return ret; 792} 793EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); 794 795void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) 796{ 797 struct ieee80211_local *local = hw_to_local(hw); 798 struct sta_info *sta; 799 u8 *state; 800 DECLARE_MAC_BUF(mac); 801 802 if (tid >= STA_TID_NUM) { 803#ifdef CONFIG_MAC80211_HT_DEBUG 804 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 805 tid, STA_TID_NUM); 806#endif 807 return; 808 } 809 810 rcu_read_lock(); 811 sta = sta_info_get(local, ra); 812 if (!sta) { 813 rcu_read_unlock(); 814#ifdef CONFIG_MAC80211_HT_DEBUG 815 printk(KERN_DEBUG "Could not find station: %s\n", 816 print_mac(mac, ra)); 817#endif 818 return; 819 } 820 821 state = &sta->ampdu_mlme.tid_state_tx[tid]; 822 spin_lock_bh(&sta->lock); 823 824 if (!(*state & HT_ADDBA_REQUESTED_MSK)) { 825#ifdef CONFIG_MAC80211_HT_DEBUG 826 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", 827 *state); 828#endif 829 spin_unlock_bh(&sta->lock); 830 rcu_read_unlock(); 831 return; 832 } 833 834 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK); 835 836 *state |= HT_ADDBA_DRV_READY_MSK; 837 838 if (*state == HT_AGG_STATE_OPERATIONAL) { 839#ifdef CONFIG_MAC80211_HT_DEBUG 840 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); 841#endif 842 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 843 } 844 spin_unlock_bh(&sta->lock); 845 rcu_read_unlock(); 846} 847EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); 848 849void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) 850{ 851 struct ieee80211_local *local = hw_to_local(hw); 852 struct sta_info *sta; 853 u8 *state; 854 int agg_queue; 855 DECLARE_MAC_BUF(mac); 856 857 if (tid >= STA_TID_NUM) { 858#ifdef CONFIG_MAC80211_HT_DEBUG 859 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 860 tid, STA_TID_NUM); 861#endif 862 return; 863 } 864 865#ifdef CONFIG_MAC80211_HT_DEBUG 866 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", 867 print_mac(mac, ra), tid); 868#endif /* CONFIG_MAC80211_HT_DEBUG */ 869 870 rcu_read_lock(); 871 sta = sta_info_get(local, ra); 872 if (!sta) { 873#ifdef CONFIG_MAC80211_HT_DEBUG 874 printk(KERN_DEBUG "Could not find station: %s\n", 875 print_mac(mac, ra)); 876#endif 877 rcu_read_unlock(); 878 return; 879 } 880 state = &sta->ampdu_mlme.tid_state_tx[tid]; 881 882 /* NOTE: no need to use sta->lock in this state check, as 883 * ieee80211_stop_tx_ba_session will let only one stop call to 884 * pass through per sta/tid 885 */ 886 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { 887#ifdef CONFIG_MAC80211_HT_DEBUG 888 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); 889#endif 890 rcu_read_unlock(); 891 return; 892 } 893 894 if (*state & HT_AGG_STATE_INITIATOR_MSK) 895 ieee80211_send_delba(sta->sdata, ra, tid, 896 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); 897 898 agg_queue = sta->tid_to_tx_q[tid]; 899 900 ieee80211_ht_agg_queue_remove(local, sta, tid, 1); 901 902 /* We just requeued the all the frames that were in the 903 * removed queue, and since we might miss a softirq we do 904 * netif_schedule_queue. ieee80211_wake_queue is not used 905 * here as this queue is not necessarily stopped 906 */ 907 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue)); 908 spin_lock_bh(&sta->lock); 909 *state = HT_AGG_STATE_IDLE; 910 sta->ampdu_mlme.addba_req_num[tid] = 0; 911 kfree(sta->ampdu_mlme.tid_tx[tid]); 912 sta->ampdu_mlme.tid_tx[tid] = NULL; 913 spin_unlock_bh(&sta->lock); 914 915 rcu_read_unlock(); 916} 917EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); 918 919void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 920 const u8 *ra, u16 tid) 921{ 922 struct ieee80211_local *local = hw_to_local(hw); 923 struct ieee80211_ra_tid *ra_tid; 924 struct sk_buff *skb = dev_alloc_skb(0); 925 926 if (unlikely(!skb)) { 927#ifdef CONFIG_MAC80211_HT_DEBUG 928 if (net_ratelimit()) 929 printk(KERN_WARNING "%s: Not enough memory, " 930 "dropping start BA session", skb->dev->name); 931#endif 932 return; 933 } 934 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 935 memcpy(&ra_tid->ra, ra, ETH_ALEN); 936 ra_tid->tid = tid; 937 938 skb->pkt_type = IEEE80211_ADDBA_MSG; 939 skb_queue_tail(&local->skb_queue, skb); 940 tasklet_schedule(&local->tasklet); 941} 942EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); 943 944void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 945 const u8 *ra, u16 tid) 946{ 947 struct ieee80211_local *local = hw_to_local(hw); 948 struct ieee80211_ra_tid *ra_tid; 949 struct sk_buff *skb = dev_alloc_skb(0); 950 951 if (unlikely(!skb)) { 952#ifdef CONFIG_MAC80211_HT_DEBUG 953 if (net_ratelimit()) 954 printk(KERN_WARNING "%s: Not enough memory, " 955 "dropping stop BA session", skb->dev->name); 956#endif 957 return; 958 } 959 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 960 memcpy(&ra_tid->ra, ra, ETH_ALEN); 961 ra_tid->tid = tid; 962 963 skb->pkt_type = IEEE80211_DELBA_MSG; 964 skb_queue_tail(&local->skb_queue, skb); 965 tasklet_schedule(&local->tasklet); 966} 967EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); 968 969static void ieee80211_set_multicast_list(struct net_device *dev) 970{ 971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 973 int allmulti, promisc, sdata_allmulti, sdata_promisc; 974 975 allmulti = !!(dev->flags & IFF_ALLMULTI); 976 promisc = !!(dev->flags & IFF_PROMISC); 977 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 978 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 979 980 if (allmulti != sdata_allmulti) { 981 if (dev->flags & IFF_ALLMULTI) 982 atomic_inc(&local->iff_allmultis); 983 else 984 atomic_dec(&local->iff_allmultis); 985 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 986 } 987 988 if (promisc != sdata_promisc) { 989 if (dev->flags & IFF_PROMISC) 990 atomic_inc(&local->iff_promiscs); 991 else 992 atomic_dec(&local->iff_promiscs); 993 sdata->flags ^= IEEE80211_SDATA_PROMISC; 994 } 995 996 dev_mc_sync(local->mdev, dev); 997} 998 999static const struct header_ops ieee80211_header_ops = { 1000 .create = eth_header, 1001 .parse = header_parse_80211, 1002 .rebuild = eth_rebuild_header, 1003 .cache = eth_header_cache, 1004 .cache_update = eth_header_cache_update, 1005}; 1006 1007void ieee80211_if_setup(struct net_device *dev) 1008{ 1009 ether_setup(dev); 1010 dev->hard_start_xmit = ieee80211_subif_start_xmit; 1011 dev->wireless_handlers = &ieee80211_iw_handler_def; 1012 dev->set_multicast_list = ieee80211_set_multicast_list; 1013 dev->change_mtu = ieee80211_change_mtu; 1014 dev->open = ieee80211_open; 1015 dev->stop = ieee80211_stop; 1016 dev->destructor = free_netdev; 1017 /* we will validate the address ourselves in ->open */ 1018 dev->validate_addr = NULL; 1019} 1020 1021/* everything else */ 1022 1023int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) 1024{ 1025 struct ieee80211_local *local = sdata->local; 1026 struct ieee80211_if_conf conf; 1027 1028 if (WARN_ON(!netif_running(sdata->dev))) 1029 return 0; 1030 1031 if (!local->ops->config_interface) 1032 return 0; 1033 1034 memset(&conf, 0, sizeof(conf)); 1035 conf.changed = changed; 1036 1037 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 1038 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 1039 conf.bssid = sdata->u.sta.bssid; 1040 conf.ssid = sdata->u.sta.ssid; 1041 conf.ssid_len = sdata->u.sta.ssid_len; 1042 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 1043 conf.bssid = sdata->dev->dev_addr; 1044 conf.ssid = sdata->u.ap.ssid; 1045 conf.ssid_len = sdata->u.ap.ssid_len; 1046 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 1047 u8 zero[ETH_ALEN] = { 0 }; 1048 conf.bssid = zero; 1049 conf.ssid = zero; 1050 conf.ssid_len = 0; 1051 } else { 1052 WARN_ON(1); 1053 return -EINVAL; 1054 } 1055 1056 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) 1057 return -EINVAL; 1058 1059 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID))) 1060 return -EINVAL; 1061 1062 return local->ops->config_interface(local_to_hw(local), 1063 &sdata->vif, &conf); 1064} 1065 1066int ieee80211_hw_config(struct ieee80211_local *local) 1067{ 1068 struct ieee80211_channel *chan; 1069 int ret = 0; 1070 1071 if (local->sta_sw_scanning) 1072 chan = local->scan_channel; 1073 else 1074 chan = local->oper_channel; 1075 1076 local->hw.conf.channel = chan; 1077 1078 if (!local->hw.conf.power_level) 1079 local->hw.conf.power_level = chan->max_power; 1080 else 1081 local->hw.conf.power_level = min(chan->max_power, 1082 local->hw.conf.power_level); 1083 1084 local->hw.conf.max_antenna_gain = chan->max_antenna_gain; 1085 1086#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1087 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", 1088 wiphy_name(local->hw.wiphy), chan->center_freq); 1089#endif 1090 1091 if (local->open_count) 1092 ret = local->ops->config(local_to_hw(local), &local->hw.conf); 1093 1094 return ret; 1095} 1096 1097/** 1098 * ieee80211_handle_ht should be used only after legacy configuration 1099 * has been determined namely band, as ht configuration depends upon 1100 * the hardware's HT abilities for a _specific_ band. 1101 */ 1102u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, 1103 struct ieee80211_ht_info *req_ht_cap, 1104 struct ieee80211_ht_bss_info *req_bss_cap) 1105{ 1106 struct ieee80211_conf *conf = &local->hw.conf; 1107 struct ieee80211_supported_band *sband; 1108 struct ieee80211_ht_info ht_conf; 1109 struct ieee80211_ht_bss_info ht_bss_conf; 1110 u32 changed = 0; 1111 int i; 1112 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; 1113 u8 tx_mcs_set_cap; 1114 1115 sband = local->hw.wiphy->bands[conf->channel->band]; 1116 1117 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); 1118 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); 1119 1120 /* HT is not supported */ 1121 if (!sband->ht_info.ht_supported) { 1122 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1123 goto out; 1124 } 1125 1126 /* disable HT */ 1127 if (!enable_ht) { 1128 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) 1129 changed |= BSS_CHANGED_HT; 1130 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1131 conf->ht_conf.ht_supported = 0; 1132 goto out; 1133 } 1134 1135 1136 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) 1137 changed |= BSS_CHANGED_HT; 1138 1139 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; 1140 ht_conf.ht_supported = 1; 1141 1142 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; 1143 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); 1144 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; 1145 ht_bss_conf.primary_channel = req_bss_cap->primary_channel; 1146 ht_bss_conf.bss_cap = req_bss_cap->bss_cap; 1147 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; 1148 1149 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; 1150 ht_conf.ampdu_density = req_ht_cap->ampdu_density; 1151 1152 /* Bits 96-100 */ 1153 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; 1154 1155 /* configure suppoerted Tx MCS according to requested MCS 1156 * (based in most cases on Rx capabilities of peer) and self 1157 * Tx MCS capabilities (as defined by low level driver HW 1158 * Tx capabilities) */ 1159 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) 1160 goto check_changed; 1161 1162 /* Counting from 0 therfore + 1 */ 1163 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) 1164 max_tx_streams = ((tx_mcs_set_cap & 1165 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; 1166 1167 for (i = 0; i < max_tx_streams; i++) 1168 ht_conf.supp_mcs_set[i] = 1169 sband->ht_info.supp_mcs_set[i] & 1170 req_ht_cap->supp_mcs_set[i]; 1171 1172 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) 1173 for (i = IEEE80211_SUPP_MCS_SET_UEQM; 1174 i < IEEE80211_SUPP_MCS_SET_LEN; i++) 1175 ht_conf.supp_mcs_set[i] = 1176 sband->ht_info.supp_mcs_set[i] & 1177 req_ht_cap->supp_mcs_set[i]; 1178 1179check_changed: 1180 /* if bss configuration changed store the new one */ 1181 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || 1182 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { 1183 changed |= BSS_CHANGED_HT; 1184 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); 1185 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); 1186 } 1187out: 1188 return changed; 1189} 1190 1191void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1192 u32 changed) 1193{ 1194 struct ieee80211_local *local = sdata->local; 1195 1196 if (!changed) 1197 return; 1198 1199 if (local->ops->bss_info_changed) 1200 local->ops->bss_info_changed(local_to_hw(local), 1201 &sdata->vif, 1202 &sdata->bss_conf, 1203 changed); 1204} 1205 1206u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 1207{ 1208 sdata->bss_conf.use_cts_prot = 0; 1209 sdata->bss_conf.use_short_preamble = 0; 1210 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE; 1211} 1212 1213void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1214 struct sk_buff *skb) 1215{ 1216 struct ieee80211_local *local = hw_to_local(hw); 1217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1218 int tmp; 1219 1220 skb->dev = local->mdev; 1221 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 1222 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 1223 &local->skb_queue : &local->skb_queue_unreliable, skb); 1224 tmp = skb_queue_len(&local->skb_queue) + 1225 skb_queue_len(&local->skb_queue_unreliable); 1226 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 1227 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1228 dev_kfree_skb_irq(skb); 1229 tmp--; 1230 I802_DEBUG_INC(local->tx_status_drop); 1231 } 1232 tasklet_schedule(&local->tasklet); 1233} 1234EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 1235 1236static void ieee80211_tasklet_handler(unsigned long data) 1237{ 1238 struct ieee80211_local *local = (struct ieee80211_local *) data; 1239 struct sk_buff *skb; 1240 struct ieee80211_rx_status rx_status; 1241 struct ieee80211_ra_tid *ra_tid; 1242 1243 while ((skb = skb_dequeue(&local->skb_queue)) || 1244 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1245 switch (skb->pkt_type) { 1246 case IEEE80211_RX_MSG: 1247 /* status is in skb->cb */ 1248 memcpy(&rx_status, skb->cb, sizeof(rx_status)); 1249 /* Clear skb->pkt_type in order to not confuse kernel 1250 * netstack. */ 1251 skb->pkt_type = 0; 1252 __ieee80211_rx(local_to_hw(local), skb, &rx_status); 1253 break; 1254 case IEEE80211_TX_STATUS_MSG: 1255 skb->pkt_type = 0; 1256 ieee80211_tx_status(local_to_hw(local), skb); 1257 break; 1258 case IEEE80211_DELBA_MSG: 1259 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1260 ieee80211_stop_tx_ba_cb(local_to_hw(local), 1261 ra_tid->ra, ra_tid->tid); 1262 dev_kfree_skb(skb); 1263 break; 1264 case IEEE80211_ADDBA_MSG: 1265 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1266 ieee80211_start_tx_ba_cb(local_to_hw(local), 1267 ra_tid->ra, ra_tid->tid); 1268 dev_kfree_skb(skb); 1269 break ; 1270 default: 1271 WARN_ON(1); 1272 dev_kfree_skb(skb); 1273 break; 1274 } 1275 } 1276} 1277 1278/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to 1279 * make a prepared TX frame (one that has been given to hw) to look like brand 1280 * new IEEE 802.11 frame that is ready to go through TX processing again. 1281 */ 1282static void ieee80211_remove_tx_extra(struct ieee80211_local *local, 1283 struct ieee80211_key *key, 1284 struct sk_buff *skb) 1285{ 1286 unsigned int hdrlen, iv_len, mic_len; 1287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1288 1289 hdrlen = ieee80211_hdrlen(hdr->frame_control); 1290 1291 if (!key) 1292 goto no_key; 1293 1294 switch (key->conf.alg) { 1295 case ALG_WEP: 1296 iv_len = WEP_IV_LEN; 1297 mic_len = WEP_ICV_LEN; 1298 break; 1299 case ALG_TKIP: 1300 iv_len = TKIP_IV_LEN; 1301 mic_len = TKIP_ICV_LEN; 1302 break; 1303 case ALG_CCMP: 1304 iv_len = CCMP_HDR_LEN; 1305 mic_len = CCMP_MIC_LEN; 1306 break; 1307 default: 1308 goto no_key; 1309 } 1310 1311 if (skb->len >= hdrlen + mic_len && 1312 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) 1313 skb_trim(skb, skb->len - mic_len); 1314 if (skb->len >= hdrlen + iv_len) { 1315 memmove(skb->data + iv_len, skb->data, hdrlen); 1316 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); 1317 } 1318 1319no_key: 1320 if (ieee80211_is_data_qos(hdr->frame_control)) { 1321 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); 1322 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, 1323 hdrlen - IEEE80211_QOS_CTL_LEN); 1324 skb_pull(skb, IEEE80211_QOS_CTL_LEN); 1325 } 1326} 1327 1328static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 1329 struct sta_info *sta, 1330 struct sk_buff *skb) 1331{ 1332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1333 1334 sta->tx_filtered_count++; 1335 1336 /* 1337 * Clear the TX filter mask for this STA when sending the next 1338 * packet. If the STA went to power save mode, this will happen 1339 * when it wakes up for the next time. 1340 */ 1341 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); 1342 1343 /* 1344 * This code races in the following way: 1345 * 1346 * (1) STA sends frame indicating it will go to sleep and does so 1347 * (2) hardware/firmware adds STA to filter list, passes frame up 1348 * (3) hardware/firmware processes TX fifo and suppresses a frame 1349 * (4) we get TX status before having processed the frame and 1350 * knowing that the STA has gone to sleep. 1351 * 1352 * This is actually quite unlikely even when both those events are 1353 * processed from interrupts coming in quickly after one another or 1354 * even at the same time because we queue both TX status events and 1355 * RX frames to be processed by a tasklet and process them in the 1356 * same order that they were received or TX status last. Hence, there 1357 * is no race as long as the frame RX is processed before the next TX 1358 * status, which drivers can ensure, see below. 1359 * 1360 * Note that this can only happen if the hardware or firmware can 1361 * actually add STAs to the filter list, if this is done by the 1362 * driver in response to set_tim() (which will only reduce the race 1363 * this whole filtering tries to solve, not completely solve it) 1364 * this situation cannot happen. 1365 * 1366 * To completely solve this race drivers need to make sure that they 1367 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 1368 * functions and 1369 * (b) always process RX events before TX status events if ordering 1370 * can be unknown, for example with different interrupt status 1371 * bits. 1372 */ 1373 if (test_sta_flags(sta, WLAN_STA_PS) && 1374 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { 1375 ieee80211_remove_tx_extra(local, sta->key, skb); 1376 skb_queue_tail(&sta->tx_filtered, skb); 1377 return; 1378 } 1379 1380 if (!test_sta_flags(sta, WLAN_STA_PS) && 1381 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { 1382 /* Software retry the packet once */ 1383 info->flags |= IEEE80211_TX_CTL_REQUEUE; 1384 ieee80211_remove_tx_extra(local, sta->key, skb); 1385 dev_queue_xmit(skb); 1386 return; 1387 } 1388 1389#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1390 if (net_ratelimit()) 1391 printk(KERN_DEBUG "%s: dropped TX filtered frame, " 1392 "queue_len=%d PS=%d @%lu\n", 1393 wiphy_name(local->hw.wiphy), 1394 skb_queue_len(&sta->tx_filtered), 1395 !!test_sta_flags(sta, WLAN_STA_PS), jiffies); 1396#endif 1397 dev_kfree_skb(skb); 1398} 1399 1400void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1401{ 1402 struct sk_buff *skb2; 1403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1404 struct ieee80211_local *local = hw_to_local(hw); 1405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1406 u16 frag, type; 1407 __le16 fc; 1408 struct ieee80211_tx_status_rtap_hdr *rthdr; 1409 struct ieee80211_sub_if_data *sdata; 1410 struct net_device *prev_dev = NULL; 1411 struct sta_info *sta; 1412 1413 rcu_read_lock(); 1414 1415 if (info->status.excessive_retries) { 1416 sta = sta_info_get(local, hdr->addr1); 1417 if (sta) { 1418 if (test_sta_flags(sta, WLAN_STA_PS)) { 1419 /* 1420 * The STA is in power save mode, so assume 1421 * that this TX packet failed because of that. 1422 */ 1423 ieee80211_handle_filtered_frame(local, sta, skb); 1424 rcu_read_unlock(); 1425 return; 1426 } 1427 } 1428 } 1429 1430 fc = hdr->frame_control; 1431 1432 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 1433 (ieee80211_is_data_qos(fc))) { 1434 u16 tid, ssn; 1435 u8 *qc; 1436 sta = sta_info_get(local, hdr->addr1); 1437 if (sta) { 1438 qc = ieee80211_get_qos_ctl(hdr); 1439 tid = qc[0] & 0xf; 1440 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 1441 & IEEE80211_SCTL_SEQ); 1442 ieee80211_send_bar(sta->sdata, hdr->addr1, 1443 tid, ssn); 1444 } 1445 } 1446 1447 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1448 sta = sta_info_get(local, hdr->addr1); 1449 if (sta) { 1450 ieee80211_handle_filtered_frame(local, sta, skb); 1451 rcu_read_unlock(); 1452 return; 1453 } 1454 } else 1455 rate_control_tx_status(local->mdev, skb); 1456 1457 rcu_read_unlock(); 1458 1459 ieee80211_led_tx(local, 0); 1460 1461 /* SNMP counters 1462 * Fragments are passed to low-level drivers as separate skbs, so these 1463 * are actually fragments, not frames. Update frame counters only for 1464 * the first fragment of the frame. */ 1465 1466 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; 1467 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; 1468 1469 if (info->flags & IEEE80211_TX_STAT_ACK) { 1470 if (frag == 0) { 1471 local->dot11TransmittedFrameCount++; 1472 if (is_multicast_ether_addr(hdr->addr1)) 1473 local->dot11MulticastTransmittedFrameCount++; 1474 if (info->status.retry_count > 0) 1475 local->dot11RetryCount++; 1476 if (info->status.retry_count > 1) 1477 local->dot11MultipleRetryCount++; 1478 } 1479 1480 /* This counter shall be incremented for an acknowledged MPDU 1481 * with an individual address in the address 1 field or an MPDU 1482 * with a multicast address in the address 1 field of type Data 1483 * or Management. */ 1484 if (!is_multicast_ether_addr(hdr->addr1) || 1485 type == IEEE80211_FTYPE_DATA || 1486 type == IEEE80211_FTYPE_MGMT) 1487 local->dot11TransmittedFragmentCount++; 1488 } else { 1489 if (frag == 0) 1490 local->dot11FailedCount++; 1491 } 1492 1493 /* this was a transmitted frame, but now we want to reuse it */ 1494 skb_orphan(skb); 1495 1496 /* 1497 * This is a bit racy but we can avoid a lot of work 1498 * with this test... 1499 */ 1500 if (!local->monitors && !local->cooked_mntrs) { 1501 dev_kfree_skb(skb); 1502 return; 1503 } 1504 1505 /* send frame to monitor interfaces now */ 1506 1507 if (skb_headroom(skb) < sizeof(*rthdr)) { 1508 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); 1509 dev_kfree_skb(skb); 1510 return; 1511 } 1512 1513 rthdr = (struct ieee80211_tx_status_rtap_hdr *) 1514 skb_push(skb, sizeof(*rthdr)); 1515 1516 memset(rthdr, 0, sizeof(*rthdr)); 1517 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); 1518 rthdr->hdr.it_present = 1519 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 1520 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 1521 1522 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 1523 !is_multicast_ether_addr(hdr->addr1)) 1524 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); 1525 1526 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && 1527 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) 1528 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); 1529 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) 1530 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); 1531 1532 rthdr->data_retries = info->status.retry_count; 1533 1534 /* XXX: is this sufficient for BPF? */ 1535 skb_set_mac_header(skb, 0); 1536 skb->ip_summed = CHECKSUM_UNNECESSARY; 1537 skb->pkt_type = PACKET_OTHERHOST; 1538 skb->protocol = htons(ETH_P_802_2); 1539 memset(skb->cb, 0, sizeof(skb->cb)); 1540 1541 rcu_read_lock(); 1542 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 1543 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { 1544 if (!netif_running(sdata->dev)) 1545 continue; 1546 1547 if (prev_dev) { 1548 skb2 = skb_clone(skb, GFP_ATOMIC); 1549 if (skb2) { 1550 skb2->dev = prev_dev; 1551 netif_rx(skb2); 1552 } 1553 } 1554 1555 prev_dev = sdata->dev; 1556 } 1557 } 1558 if (prev_dev) { 1559 skb->dev = prev_dev; 1560 netif_rx(skb); 1561 skb = NULL; 1562 } 1563 rcu_read_unlock(); 1564 dev_kfree_skb(skb); 1565} 1566EXPORT_SYMBOL(ieee80211_tx_status); 1567 1568struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1569 const struct ieee80211_ops *ops) 1570{ 1571 struct ieee80211_local *local; 1572 int priv_size; 1573 struct wiphy *wiphy; 1574 1575 /* Ensure 32-byte alignment of our private data and hw private data. 1576 * We use the wiphy priv data for both our ieee80211_local and for 1577 * the driver's private data 1578 * 1579 * In memory it'll be like this: 1580 * 1581 * +-------------------------+ 1582 * | struct wiphy | 1583 * +-------------------------+ 1584 * | struct ieee80211_local | 1585 * +-------------------------+ 1586 * | driver's private data | 1587 * +-------------------------+ 1588 * 1589 */ 1590 priv_size = ((sizeof(struct ieee80211_local) + 1591 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + 1592 priv_data_len; 1593 1594 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 1595 1596 if (!wiphy) 1597 return NULL; 1598 1599 wiphy->privid = mac80211_wiphy_privid; 1600 1601 local = wiphy_priv(wiphy); 1602 local->hw.wiphy = wiphy; 1603 1604 local->hw.priv = (char *)local + 1605 ((sizeof(struct ieee80211_local) + 1606 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); 1607 1608 BUG_ON(!ops->tx); 1609 BUG_ON(!ops->start); 1610 BUG_ON(!ops->stop); 1611 BUG_ON(!ops->config); 1612 BUG_ON(!ops->add_interface); 1613 BUG_ON(!ops->remove_interface); 1614 BUG_ON(!ops->configure_filter); 1615 local->ops = ops; 1616 1617 local->hw.queues = 1; /* default */ 1618 1619 local->bridge_packets = 1; 1620 1621 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; 1622 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; 1623 local->short_retry_limit = 7; 1624 local->long_retry_limit = 4; 1625 local->hw.conf.radio_enabled = 1; 1626 1627 INIT_LIST_HEAD(&local->interfaces); 1628 1629 spin_lock_init(&local->key_lock); 1630 1631 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); 1632 1633 sta_info_init(local); 1634 1635 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 1636 (unsigned long)local); 1637 tasklet_disable(&local->tx_pending_tasklet); 1638 1639 tasklet_init(&local->tasklet, 1640 ieee80211_tasklet_handler, 1641 (unsigned long) local); 1642 tasklet_disable(&local->tasklet); 1643 1644 skb_queue_head_init(&local->skb_queue); 1645 skb_queue_head_init(&local->skb_queue_unreliable); 1646 1647 return local_to_hw(local); 1648} 1649EXPORT_SYMBOL(ieee80211_alloc_hw); 1650 1651int ieee80211_register_hw(struct ieee80211_hw *hw) 1652{ 1653 struct ieee80211_local *local = hw_to_local(hw); 1654 const char *name; 1655 int result; 1656 enum ieee80211_band band; 1657 struct net_device *mdev; 1658 struct wireless_dev *mwdev; 1659 1660 /* 1661 * generic code guarantees at least one band, 1662 * set this very early because much code assumes 1663 * that hw.conf.channel is assigned 1664 */ 1665 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1666 struct ieee80211_supported_band *sband; 1667 1668 sband = local->hw.wiphy->bands[band]; 1669 if (sband) { 1670 /* init channel we're on */ 1671 local->hw.conf.channel = 1672 local->oper_channel = 1673 local->scan_channel = &sband->channels[0]; 1674 break; 1675 } 1676 } 1677 1678 /* if low-level driver supports AP, we also support VLAN */ 1679 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 1680 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1681 1682 /* mac80211 always supports monitor */ 1683 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1684 1685 result = wiphy_register(local->hw.wiphy); 1686 if (result < 0) 1687 return result; 1688 1689 /* 1690 * We use the number of queues for feature tests (QoS, HT) internally 1691 * so restrict them appropriately. 1692 */ 1693 if (hw->queues > IEEE80211_MAX_QUEUES) 1694 hw->queues = IEEE80211_MAX_QUEUES; 1695 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) 1696 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; 1697 if (hw->queues < 4) 1698 hw->ampdu_queues = 0; 1699 1700 mdev = alloc_netdev_mq(sizeof(struct wireless_dev), 1701 "wmaster%d", ether_setup, 1702 ieee80211_num_queues(hw)); 1703 if (!mdev) 1704 goto fail_mdev_alloc; 1705 1706 mwdev = netdev_priv(mdev); 1707 mdev->ieee80211_ptr = mwdev; 1708 mwdev->wiphy = local->hw.wiphy; 1709 1710 local->mdev = mdev; 1711 1712 ieee80211_rx_bss_list_init(local); 1713 1714 mdev->hard_start_xmit = ieee80211_master_start_xmit; 1715 mdev->open = ieee80211_master_open; 1716 mdev->stop = ieee80211_master_stop; 1717 mdev->type = ARPHRD_IEEE80211; 1718 mdev->header_ops = &ieee80211_header_ops; 1719 mdev->set_multicast_list = ieee80211_master_set_multicast_list; 1720 1721 name = wiphy_dev(local->hw.wiphy)->driver->name; 1722 local->hw.workqueue = create_freezeable_workqueue(name); 1723 if (!local->hw.workqueue) { 1724 result = -ENOMEM; 1725 goto fail_workqueue; 1726 } 1727 1728 /* 1729 * The hardware needs headroom for sending the frame, 1730 * and we need some headroom for passing the frame to monitor 1731 * interfaces, but never both at the same time. 1732 */ 1733 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1734 sizeof(struct ieee80211_tx_status_rtap_hdr)); 1735 1736 debugfs_hw_add(local); 1737 1738 if (local->hw.conf.beacon_int < 10) 1739 local->hw.conf.beacon_int = 100; 1740 1741 if (local->hw.max_listen_interval == 0) 1742 local->hw.max_listen_interval = 1; 1743 1744 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1745 1746 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | 1747 IEEE80211_HW_SIGNAL_DB | 1748 IEEE80211_HW_SIGNAL_DBM) ? 1749 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; 1750 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? 1751 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; 1752 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 1753 local->wstats_flags |= IW_QUAL_DBM; 1754 1755 result = sta_info_start(local); 1756 if (result < 0) 1757 goto fail_sta_info; 1758 1759 rtnl_lock(); 1760 result = dev_alloc_name(local->mdev, local->mdev->name); 1761 if (result < 0) 1762 goto fail_dev; 1763 1764 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1765 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); 1766 1767 result = register_netdevice(local->mdev); 1768 if (result < 0) 1769 goto fail_dev; 1770 1771 result = ieee80211_init_rate_ctrl_alg(local, 1772 hw->rate_control_algorithm); 1773 if (result < 0) { 1774 printk(KERN_DEBUG "%s: Failed to initialize rate control " 1775 "algorithm\n", wiphy_name(local->hw.wiphy)); 1776 goto fail_rate; 1777 } 1778 1779 result = ieee80211_wep_init(local); 1780 1781 if (result < 0) { 1782 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", 1783 wiphy_name(local->hw.wiphy), result); 1784 goto fail_wep; 1785 } 1786 1787 local->mdev->select_queue = ieee80211_select_queue; 1788 1789 /* add one default STA interface */ 1790 result = ieee80211_if_add(local, "wlan%d", NULL, 1791 IEEE80211_IF_TYPE_STA, NULL); 1792 if (result) 1793 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 1794 wiphy_name(local->hw.wiphy)); 1795 1796 rtnl_unlock(); 1797 1798 ieee80211_led_init(local); 1799 1800 return 0; 1801 1802fail_wep: 1803 rate_control_deinitialize(local); 1804fail_rate: 1805 unregister_netdevice(local->mdev); 1806 local->mdev = NULL; 1807fail_dev: 1808 rtnl_unlock(); 1809 sta_info_stop(local); 1810fail_sta_info: 1811 debugfs_hw_del(local); 1812 destroy_workqueue(local->hw.workqueue); 1813fail_workqueue: 1814 if (local->mdev) 1815 free_netdev(local->mdev); 1816fail_mdev_alloc: 1817 wiphy_unregister(local->hw.wiphy); 1818 return result; 1819} 1820EXPORT_SYMBOL(ieee80211_register_hw); 1821 1822void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1823{ 1824 struct ieee80211_local *local = hw_to_local(hw); 1825 1826 tasklet_kill(&local->tx_pending_tasklet); 1827 tasklet_kill(&local->tasklet); 1828 1829 rtnl_lock(); 1830 1831 /* 1832 * At this point, interface list manipulations are fine 1833 * because the driver cannot be handing us frames any 1834 * more and the tasklet is killed. 1835 */ 1836 1837 /* First, we remove all virtual interfaces. */ 1838 ieee80211_remove_interfaces(local); 1839 1840 /* then, finally, remove the master interface */ 1841 unregister_netdevice(local->mdev); 1842 1843 rtnl_unlock(); 1844 1845 ieee80211_rx_bss_list_deinit(local); 1846 ieee80211_clear_tx_pending(local); 1847 sta_info_stop(local); 1848 rate_control_deinitialize(local); 1849 debugfs_hw_del(local); 1850 1851 if (skb_queue_len(&local->skb_queue) 1852 || skb_queue_len(&local->skb_queue_unreliable)) 1853 printk(KERN_WARNING "%s: skb_queue not empty\n", 1854 wiphy_name(local->hw.wiphy)); 1855 skb_queue_purge(&local->skb_queue); 1856 skb_queue_purge(&local->skb_queue_unreliable); 1857 1858 destroy_workqueue(local->hw.workqueue); 1859 wiphy_unregister(local->hw.wiphy); 1860 ieee80211_wep_free(local); 1861 ieee80211_led_exit(local); 1862 free_netdev(local->mdev); 1863} 1864EXPORT_SYMBOL(ieee80211_unregister_hw); 1865 1866void ieee80211_free_hw(struct ieee80211_hw *hw) 1867{ 1868 struct ieee80211_local *local = hw_to_local(hw); 1869 1870 wiphy_free(local->hw.wiphy); 1871} 1872EXPORT_SYMBOL(ieee80211_free_hw); 1873 1874static int __init ieee80211_init(void) 1875{ 1876 struct sk_buff *skb; 1877 int ret; 1878 1879 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1880 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1881 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1882 1883 ret = rc80211_pid_init(); 1884 if (ret) 1885 return ret; 1886 1887 ieee80211_debugfs_netdev_init(); 1888 1889 return 0; 1890} 1891 1892static void __exit ieee80211_exit(void) 1893{ 1894 rc80211_pid_exit(); 1895 1896 /* 1897 * For key todo, it'll be empty by now but the work 1898 * might still be scheduled. 1899 */ 1900 flush_scheduled_work(); 1901 1902 if (mesh_allocated) 1903 ieee80211s_stop(); 1904 1905 ieee80211_debugfs_netdev_exit(); 1906} 1907 1908 1909subsys_initcall(ieee80211_init); 1910module_exit(ieee80211_exit); 1911 1912MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1913MODULE_LICENSE("GPL"); 1914