main.c revision e039fa4a4195ac4ee895e6f3d1334beed63256fe
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 (sdata->dev != dev && netif_running(sdata->dev)) { 109 res = 0; 110 break; 111 } 112 } 113 114 if (res) 115 return res; 116 117 netif_start_queue(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 (sdata->dev != dev && 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 printk(KERN_WARNING "%s: invalid MTU %d\n", 156 dev->name, new_mtu); 157 return -EINVAL; 158 } 159 160#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 161 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); 162#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ 163 dev->mtu = new_mtu; 164 return 0; 165} 166 167static inline int identical_mac_addr_allowed(int type1, int type2) 168{ 169 return (type1 == IEEE80211_IF_TYPE_MNTR || 170 type2 == IEEE80211_IF_TYPE_MNTR || 171 (type1 == IEEE80211_IF_TYPE_AP && 172 type2 == IEEE80211_IF_TYPE_WDS) || 173 (type1 == IEEE80211_IF_TYPE_WDS && 174 (type2 == IEEE80211_IF_TYPE_WDS || 175 type2 == IEEE80211_IF_TYPE_AP)) || 176 (type1 == IEEE80211_IF_TYPE_AP && 177 type2 == IEEE80211_IF_TYPE_VLAN) || 178 (type1 == IEEE80211_IF_TYPE_VLAN && 179 (type2 == IEEE80211_IF_TYPE_AP || 180 type2 == IEEE80211_IF_TYPE_VLAN))); 181} 182 183static int ieee80211_open(struct net_device *dev) 184{ 185 struct ieee80211_sub_if_data *sdata, *nsdata; 186 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 187 struct ieee80211_if_init_conf conf; 188 int res; 189 bool need_hw_reconfig = 0; 190 struct sta_info *sta; 191 192 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 193 194 /* we hold the RTNL here so can safely walk the list */ 195 list_for_each_entry(nsdata, &local->interfaces, list) { 196 struct net_device *ndev = nsdata->dev; 197 198 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) { 199 /* 200 * Allow only a single IBSS interface to be up at any 201 * time. This is restricted because beacon distribution 202 * cannot work properly if both are in the same IBSS. 203 * 204 * To remove this restriction we'd have to disallow them 205 * from setting the same SSID on different IBSS interfaces 206 * belonging to the same hardware. Then, however, we're 207 * faced with having to adopt two different TSF timers... 208 */ 209 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && 210 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) 211 return -EBUSY; 212 213 /* 214 * Disallow multiple IBSS/STA mode interfaces. 215 * 216 * This is a technical restriction, it is possible although 217 * most likely not IEEE 802.11 compliant to have multiple 218 * STAs with just a single hardware (the TSF timer will not 219 * be adjusted properly.) 220 * 221 * However, because mac80211 uses the master device's BSS 222 * information for each STA/IBSS interface, doing this will 223 * currently corrupt that BSS information completely, unless, 224 * a not very useful case, both STAs are associated to the 225 * same BSS. 226 * 227 * To remove this restriction, the BSS information needs to 228 * be embedded in the STA/IBSS mode sdata instead of using 229 * the master device's BSS structure. 230 */ 231 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA || 232 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) && 233 (nsdata->vif.type == IEEE80211_IF_TYPE_STA || 234 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)) 235 return -EBUSY; 236 237 /* 238 * The remaining checks are only performed for interfaces 239 * with the same MAC address. 240 */ 241 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) 242 continue; 243 244 /* 245 * check whether it may have the same address 246 */ 247 if (!identical_mac_addr_allowed(sdata->vif.type, 248 nsdata->vif.type)) 249 return -ENOTUNIQ; 250 251 /* 252 * can only add VLANs to enabled APs 253 */ 254 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && 255 nsdata->vif.type == IEEE80211_IF_TYPE_AP) 256 sdata->u.vlan.ap = nsdata; 257 } 258 } 259 260 switch (sdata->vif.type) { 261 case IEEE80211_IF_TYPE_WDS: 262 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 263 return -ENOLINK; 264 break; 265 case IEEE80211_IF_TYPE_VLAN: 266 if (!sdata->u.vlan.ap) 267 return -ENOLINK; 268 break; 269 case IEEE80211_IF_TYPE_AP: 270 case IEEE80211_IF_TYPE_STA: 271 case IEEE80211_IF_TYPE_MNTR: 272 case IEEE80211_IF_TYPE_IBSS: 273 case IEEE80211_IF_TYPE_MESH_POINT: 274 /* no special treatment */ 275 break; 276 case IEEE80211_IF_TYPE_INVALID: 277 /* cannot happen */ 278 WARN_ON(1); 279 break; 280 } 281 282 if (local->open_count == 0) { 283 res = 0; 284 if (local->ops->start) 285 res = local->ops->start(local_to_hw(local)); 286 if (res) 287 return res; 288 need_hw_reconfig = 1; 289 ieee80211_led_radio(local, local->hw.conf.radio_enabled); 290 } 291 292 switch (sdata->vif.type) { 293 case IEEE80211_IF_TYPE_VLAN: 294 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans); 295 /* no need to tell driver */ 296 break; 297 case IEEE80211_IF_TYPE_MNTR: 298 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 299 local->cooked_mntrs++; 300 break; 301 } 302 303 /* must be before the call to ieee80211_configure_filter */ 304 local->monitors++; 305 if (local->monitors == 1) 306 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; 307 308 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 309 local->fif_fcsfail++; 310 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 311 local->fif_plcpfail++; 312 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 313 local->fif_control++; 314 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 315 local->fif_other_bss++; 316 317 netif_tx_lock_bh(local->mdev); 318 ieee80211_configure_filter(local); 319 netif_tx_unlock_bh(local->mdev); 320 break; 321 case IEEE80211_IF_TYPE_STA: 322 case IEEE80211_IF_TYPE_IBSS: 323 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; 324 /* fall through */ 325 default: 326 conf.vif = &sdata->vif; 327 conf.type = sdata->vif.type; 328 conf.mac_addr = dev->dev_addr; 329 res = local->ops->add_interface(local_to_hw(local), &conf); 330 if (res) 331 goto err_stop; 332 333 ieee80211_if_config(dev); 334 ieee80211_reset_erp_info(dev); 335 ieee80211_enable_keys(sdata); 336 337 if (sdata->vif.type == IEEE80211_IF_TYPE_STA && 338 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) 339 netif_carrier_off(dev); 340 else 341 netif_carrier_on(dev); 342 } 343 344 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { 345 /* Create STA entry for the WDS peer */ 346 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 347 GFP_KERNEL); 348 if (!sta) { 349 res = -ENOMEM; 350 goto err_del_interface; 351 } 352 353 /* no locking required since STA is not live yet */ 354 sta->flags |= WLAN_STA_AUTHORIZED; 355 356 res = sta_info_insert(sta); 357 if (res) { 358 /* STA has been freed */ 359 goto err_del_interface; 360 } 361 } 362 363 if (local->open_count == 0) { 364 res = dev_open(local->mdev); 365 WARN_ON(res); 366 if (res) 367 goto err_del_interface; 368 tasklet_enable(&local->tx_pending_tasklet); 369 tasklet_enable(&local->tasklet); 370 } 371 372 /* 373 * set_multicast_list will be invoked by the networking core 374 * which will check whether any increments here were done in 375 * error and sync them down to the hardware as filter flags. 376 */ 377 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 378 atomic_inc(&local->iff_allmultis); 379 380 if (sdata->flags & IEEE80211_SDATA_PROMISC) 381 atomic_inc(&local->iff_promiscs); 382 383 local->open_count++; 384 if (need_hw_reconfig) 385 ieee80211_hw_config(local); 386 387 /* 388 * ieee80211_sta_work is disabled while network interface 389 * is down. Therefore, some configuration changes may not 390 * yet be effective. Trigger execution of ieee80211_sta_work 391 * to fix this. 392 */ 393 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 394 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 395 struct ieee80211_if_sta *ifsta = &sdata->u.sta; 396 queue_work(local->hw.workqueue, &ifsta->work); 397 } 398 399 netif_start_queue(dev); 400 401 return 0; 402 err_del_interface: 403 local->ops->remove_interface(local_to_hw(local), &conf); 404 err_stop: 405 if (!local->open_count && local->ops->stop) 406 local->ops->stop(local_to_hw(local)); 407 return res; 408} 409 410static int ieee80211_stop(struct net_device *dev) 411{ 412 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 413 struct ieee80211_local *local = sdata->local; 414 struct ieee80211_if_init_conf conf; 415 struct sta_info *sta; 416 417 /* 418 * Stop TX on this interface first. 419 */ 420 netif_stop_queue(dev); 421 422 /* 423 * Now delete all active aggregation sessions. 424 */ 425 rcu_read_lock(); 426 427 list_for_each_entry_rcu(sta, &local->sta_list, list) { 428 if (sta->sdata == sdata) 429 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr); 430 } 431 432 rcu_read_unlock(); 433 434 /* 435 * Remove all stations associated with this interface. 436 * 437 * This must be done before calling ops->remove_interface() 438 * because otherwise we can later invoke ops->sta_notify() 439 * whenever the STAs are removed, and that invalidates driver 440 * assumptions about always getting a vif pointer that is valid 441 * (because if we remove a STA after ops->remove_interface() 442 * the driver will have removed the vif info already!) 443 * 444 * We could relax this and only unlink the stations from the 445 * hash table and list but keep them on a per-sdata list that 446 * will be inserted back again when the interface is brought 447 * up again, but I don't currently see a use case for that, 448 * except with WDS which gets a STA entry created when it is 449 * brought up. 450 */ 451 sta_info_flush(local, sdata); 452 453 /* 454 * Don't count this interface for promisc/allmulti while it 455 * is down. dev_mc_unsync() will invoke set_multicast_list 456 * on the master interface which will sync these down to the 457 * hardware as filter flags. 458 */ 459 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 460 atomic_dec(&local->iff_allmultis); 461 462 if (sdata->flags & IEEE80211_SDATA_PROMISC) 463 atomic_dec(&local->iff_promiscs); 464 465 dev_mc_unsync(local->mdev, dev); 466 467 /* APs need special treatment */ 468 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 469 struct ieee80211_sub_if_data *vlan, *tmp; 470 struct beacon_data *old_beacon = sdata->u.ap.beacon; 471 472 /* remove beacon */ 473 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 474 synchronize_rcu(); 475 kfree(old_beacon); 476 477 /* down all dependent devices, that is VLANs */ 478 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, 479 u.vlan.list) 480 dev_close(vlan->dev); 481 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 482 } 483 484 local->open_count--; 485 486 switch (sdata->vif.type) { 487 case IEEE80211_IF_TYPE_VLAN: 488 list_del(&sdata->u.vlan.list); 489 sdata->u.vlan.ap = NULL; 490 /* no need to tell driver */ 491 break; 492 case IEEE80211_IF_TYPE_MNTR: 493 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 494 local->cooked_mntrs--; 495 break; 496 } 497 498 local->monitors--; 499 if (local->monitors == 0) 500 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; 501 502 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 503 local->fif_fcsfail--; 504 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 505 local->fif_plcpfail--; 506 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 507 local->fif_control--; 508 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 509 local->fif_other_bss--; 510 511 netif_tx_lock_bh(local->mdev); 512 ieee80211_configure_filter(local); 513 netif_tx_unlock_bh(local->mdev); 514 break; 515 case IEEE80211_IF_TYPE_MESH_POINT: 516 case IEEE80211_IF_TYPE_STA: 517 case IEEE80211_IF_TYPE_IBSS: 518 sdata->u.sta.state = IEEE80211_DISABLED; 519 del_timer_sync(&sdata->u.sta.timer); 520 /* 521 * When we get here, the interface is marked down. 522 * Call synchronize_rcu() to wait for the RX path 523 * should it be using the interface and enqueuing 524 * frames at this very time on another CPU. 525 */ 526 synchronize_rcu(); 527 skb_queue_purge(&sdata->u.sta.skb_queue); 528 529 if (local->scan_dev == sdata->dev) { 530 if (!local->ops->hw_scan) { 531 local->sta_sw_scanning = 0; 532 cancel_delayed_work(&local->scan_work); 533 } else 534 local->sta_hw_scanning = 0; 535 } 536 537 flush_workqueue(local->hw.workqueue); 538 539 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; 540 kfree(sdata->u.sta.extra_ie); 541 sdata->u.sta.extra_ie = NULL; 542 sdata->u.sta.extra_ie_len = 0; 543 /* fall through */ 544 default: 545 conf.vif = &sdata->vif; 546 conf.type = sdata->vif.type; 547 conf.mac_addr = dev->dev_addr; 548 /* disable all keys for as long as this netdev is down */ 549 ieee80211_disable_keys(sdata); 550 local->ops->remove_interface(local_to_hw(local), &conf); 551 } 552 553 if (local->open_count == 0) { 554 if (netif_running(local->mdev)) 555 dev_close(local->mdev); 556 557 if (local->ops->stop) 558 local->ops->stop(local_to_hw(local)); 559 560 ieee80211_led_radio(local, 0); 561 562 tasklet_disable(&local->tx_pending_tasklet); 563 tasklet_disable(&local->tasklet); 564 } 565 566 return 0; 567} 568 569int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) 570{ 571 struct ieee80211_local *local = hw_to_local(hw); 572 struct sta_info *sta; 573 struct ieee80211_sub_if_data *sdata; 574 u16 start_seq_num = 0; 575 u8 *state; 576 int ret; 577 DECLARE_MAC_BUF(mac); 578 579 if (tid >= STA_TID_NUM) 580 return -EINVAL; 581 582#ifdef CONFIG_MAC80211_HT_DEBUG 583 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", 584 print_mac(mac, ra), tid); 585#endif /* CONFIG_MAC80211_HT_DEBUG */ 586 587 rcu_read_lock(); 588 589 sta = sta_info_get(local, ra); 590 if (!sta) { 591 printk(KERN_DEBUG "Could not find the station\n"); 592 rcu_read_unlock(); 593 return -ENOENT; 594 } 595 596 spin_lock_bh(&sta->lock); 597 598 /* we have tried too many times, receiver does not want A-MPDU */ 599 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { 600 ret = -EBUSY; 601 goto start_ba_exit; 602 } 603 604 state = &sta->ampdu_mlme.tid_state_tx[tid]; 605 /* check if the TID is not in aggregation flow already */ 606 if (*state != HT_AGG_STATE_IDLE) { 607#ifdef CONFIG_MAC80211_HT_DEBUG 608 printk(KERN_DEBUG "BA request denied - session is not " 609 "idle on tid %u\n", tid); 610#endif /* CONFIG_MAC80211_HT_DEBUG */ 611 ret = -EAGAIN; 612 goto start_ba_exit; 613 } 614 615 /* prepare A-MPDU MLME for Tx aggregation */ 616 sta->ampdu_mlme.tid_tx[tid] = 617 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); 618 if (!sta->ampdu_mlme.tid_tx[tid]) { 619 if (net_ratelimit()) 620 printk(KERN_ERR "allocate tx mlme to tid %d failed\n", 621 tid); 622 ret = -ENOMEM; 623 goto start_ba_exit; 624 } 625 /* Tx timer */ 626 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = 627 sta_addba_resp_timer_expired; 628 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = 629 (unsigned long)&sta->timer_to_tid[tid]; 630 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 631 632 /* ensure that TX flow won't interrupt us 633 * until the end of the call to requeue function */ 634 spin_lock_bh(&local->mdev->queue_lock); 635 636 /* create a new queue for this aggregation */ 637 ret = ieee80211_ht_agg_queue_add(local, sta, tid); 638 639 /* case no queue is available to aggregation 640 * don't switch to aggregation */ 641 if (ret) { 642#ifdef CONFIG_MAC80211_HT_DEBUG 643 printk(KERN_DEBUG "BA request denied - queue unavailable for" 644 " tid %d\n", tid); 645#endif /* CONFIG_MAC80211_HT_DEBUG */ 646 goto start_ba_err; 647 } 648 sdata = sta->sdata; 649 650 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the 651 * call back right away, it must see that the flow has begun */ 652 *state |= HT_ADDBA_REQUESTED_MSK; 653 654 if (local->ops->ampdu_action) 655 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, 656 ra, tid, &start_seq_num); 657 658 if (ret) { 659 /* No need to requeue the packets in the agg queue, since we 660 * held the tx lock: no packet could be enqueued to the newly 661 * allocated queue */ 662 ieee80211_ht_agg_queue_remove(local, sta, tid, 0); 663#ifdef CONFIG_MAC80211_HT_DEBUG 664 printk(KERN_DEBUG "BA request denied - HW unavailable for" 665 " tid %d\n", tid); 666#endif /* CONFIG_MAC80211_HT_DEBUG */ 667 *state = HT_AGG_STATE_IDLE; 668 goto start_ba_err; 669 } 670 671 /* Will put all the packets in the new SW queue */ 672 ieee80211_requeue(local, ieee802_1d_to_ac[tid]); 673 spin_unlock_bh(&local->mdev->queue_lock); 674 675 /* send an addBA request */ 676 sta->ampdu_mlme.dialog_token_allocator++; 677 sta->ampdu_mlme.tid_tx[tid]->dialog_token = 678 sta->ampdu_mlme.dialog_token_allocator; 679 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; 680 681 ieee80211_send_addba_request(sta->sdata->dev, ra, tid, 682 sta->ampdu_mlme.tid_tx[tid]->dialog_token, 683 sta->ampdu_mlme.tid_tx[tid]->ssn, 684 0x40, 5000); 685 686 /* activate the timer for the recipient's addBA response */ 687 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = 688 jiffies + ADDBA_RESP_INTERVAL; 689 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 690 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); 691 goto start_ba_exit; 692 693start_ba_err: 694 kfree(sta->ampdu_mlme.tid_tx[tid]); 695 sta->ampdu_mlme.tid_tx[tid] = NULL; 696 spin_unlock_bh(&local->mdev->queue_lock); 697 ret = -EBUSY; 698start_ba_exit: 699 spin_unlock_bh(&sta->lock); 700 rcu_read_unlock(); 701 return ret; 702} 703EXPORT_SYMBOL(ieee80211_start_tx_ba_session); 704 705int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 706 u8 *ra, u16 tid, 707 enum ieee80211_back_parties initiator) 708{ 709 struct ieee80211_local *local = hw_to_local(hw); 710 struct sta_info *sta; 711 u8 *state; 712 int ret = 0; 713 DECLARE_MAC_BUF(mac); 714 715 if (tid >= STA_TID_NUM) 716 return -EINVAL; 717 718 rcu_read_lock(); 719 sta = sta_info_get(local, ra); 720 if (!sta) { 721 rcu_read_unlock(); 722 return -ENOENT; 723 } 724 725 /* check if the TID is in aggregation */ 726 state = &sta->ampdu_mlme.tid_state_tx[tid]; 727 spin_lock_bh(&sta->lock); 728 729 if (*state != HT_AGG_STATE_OPERATIONAL) { 730 ret = -ENOENT; 731 goto stop_BA_exit; 732 } 733 734#ifdef CONFIG_MAC80211_HT_DEBUG 735 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", 736 print_mac(mac, ra), tid); 737#endif /* CONFIG_MAC80211_HT_DEBUG */ 738 739 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); 740 741 *state = HT_AGG_STATE_REQ_STOP_BA_MSK | 742 (initiator << HT_AGG_STATE_INITIATOR_SHIFT); 743 744 if (local->ops->ampdu_action) 745 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, 746 ra, tid, NULL); 747 748 /* case HW denied going back to legacy */ 749 if (ret) { 750 WARN_ON(ret != -EBUSY); 751 *state = HT_AGG_STATE_OPERATIONAL; 752 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 753 goto stop_BA_exit; 754 } 755 756stop_BA_exit: 757 spin_unlock_bh(&sta->lock); 758 rcu_read_unlock(); 759 return ret; 760} 761EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); 762 763void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) 764{ 765 struct ieee80211_local *local = hw_to_local(hw); 766 struct sta_info *sta; 767 u8 *state; 768 DECLARE_MAC_BUF(mac); 769 770 if (tid >= STA_TID_NUM) { 771 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 772 tid, STA_TID_NUM); 773 return; 774 } 775 776 rcu_read_lock(); 777 sta = sta_info_get(local, ra); 778 if (!sta) { 779 rcu_read_unlock(); 780 printk(KERN_DEBUG "Could not find station: %s\n", 781 print_mac(mac, ra)); 782 return; 783 } 784 785 state = &sta->ampdu_mlme.tid_state_tx[tid]; 786 spin_lock_bh(&sta->lock); 787 788 if (!(*state & HT_ADDBA_REQUESTED_MSK)) { 789 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", 790 *state); 791 spin_unlock_bh(&sta->lock); 792 rcu_read_unlock(); 793 return; 794 } 795 796 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK); 797 798 *state |= HT_ADDBA_DRV_READY_MSK; 799 800 if (*state == HT_AGG_STATE_OPERATIONAL) { 801 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); 802 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 803 } 804 spin_unlock_bh(&sta->lock); 805 rcu_read_unlock(); 806} 807EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); 808 809void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) 810{ 811 struct ieee80211_local *local = hw_to_local(hw); 812 struct sta_info *sta; 813 u8 *state; 814 int agg_queue; 815 DECLARE_MAC_BUF(mac); 816 817 if (tid >= STA_TID_NUM) { 818 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 819 tid, STA_TID_NUM); 820 return; 821 } 822 823#ifdef CONFIG_MAC80211_HT_DEBUG 824 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", 825 print_mac(mac, ra), tid); 826#endif /* CONFIG_MAC80211_HT_DEBUG */ 827 828 rcu_read_lock(); 829 sta = sta_info_get(local, ra); 830 if (!sta) { 831 printk(KERN_DEBUG "Could not find station: %s\n", 832 print_mac(mac, ra)); 833 rcu_read_unlock(); 834 return; 835 } 836 state = &sta->ampdu_mlme.tid_state_tx[tid]; 837 838 spin_lock_bh(&sta->lock); 839 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { 840 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); 841 spin_unlock_bh(&sta->lock); 842 rcu_read_unlock(); 843 return; 844 } 845 846 if (*state & HT_AGG_STATE_INITIATOR_MSK) 847 ieee80211_send_delba(sta->sdata->dev, ra, tid, 848 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); 849 850 agg_queue = sta->tid_to_tx_q[tid]; 851 852 /* avoid ordering issues: we are the only one that can modify 853 * the content of the qdiscs */ 854 spin_lock_bh(&local->mdev->queue_lock); 855 /* remove the queue for this aggregation */ 856 ieee80211_ht_agg_queue_remove(local, sta, tid, 1); 857 spin_unlock_bh(&local->mdev->queue_lock); 858 859 /* we just requeued the all the frames that were in the removed 860 * queue, and since we might miss a softirq we do netif_schedule. 861 * ieee80211_wake_queue is not used here as this queue is not 862 * necessarily stopped */ 863 netif_schedule(local->mdev); 864 *state = HT_AGG_STATE_IDLE; 865 sta->ampdu_mlme.addba_req_num[tid] = 0; 866 kfree(sta->ampdu_mlme.tid_tx[tid]); 867 sta->ampdu_mlme.tid_tx[tid] = NULL; 868 spin_unlock_bh(&sta->lock); 869 870 rcu_read_unlock(); 871} 872EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); 873 874void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 875 const u8 *ra, u16 tid) 876{ 877 struct ieee80211_local *local = hw_to_local(hw); 878 struct ieee80211_ra_tid *ra_tid; 879 struct sk_buff *skb = dev_alloc_skb(0); 880 881 if (unlikely(!skb)) { 882 if (net_ratelimit()) 883 printk(KERN_WARNING "%s: Not enough memory, " 884 "dropping start BA session", skb->dev->name); 885 return; 886 } 887 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 888 memcpy(&ra_tid->ra, ra, ETH_ALEN); 889 ra_tid->tid = tid; 890 891 skb->pkt_type = IEEE80211_ADDBA_MSG; 892 skb_queue_tail(&local->skb_queue, skb); 893 tasklet_schedule(&local->tasklet); 894} 895EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); 896 897void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 898 const u8 *ra, u16 tid) 899{ 900 struct ieee80211_local *local = hw_to_local(hw); 901 struct ieee80211_ra_tid *ra_tid; 902 struct sk_buff *skb = dev_alloc_skb(0); 903 904 if (unlikely(!skb)) { 905 if (net_ratelimit()) 906 printk(KERN_WARNING "%s: Not enough memory, " 907 "dropping stop BA session", skb->dev->name); 908 return; 909 } 910 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 911 memcpy(&ra_tid->ra, ra, ETH_ALEN); 912 ra_tid->tid = tid; 913 914 skb->pkt_type = IEEE80211_DELBA_MSG; 915 skb_queue_tail(&local->skb_queue, skb); 916 tasklet_schedule(&local->tasklet); 917} 918EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); 919 920static void ieee80211_set_multicast_list(struct net_device *dev) 921{ 922 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 923 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 924 int allmulti, promisc, sdata_allmulti, sdata_promisc; 925 926 allmulti = !!(dev->flags & IFF_ALLMULTI); 927 promisc = !!(dev->flags & IFF_PROMISC); 928 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 929 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 930 931 if (allmulti != sdata_allmulti) { 932 if (dev->flags & IFF_ALLMULTI) 933 atomic_inc(&local->iff_allmultis); 934 else 935 atomic_dec(&local->iff_allmultis); 936 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 937 } 938 939 if (promisc != sdata_promisc) { 940 if (dev->flags & IFF_PROMISC) 941 atomic_inc(&local->iff_promiscs); 942 else 943 atomic_dec(&local->iff_promiscs); 944 sdata->flags ^= IEEE80211_SDATA_PROMISC; 945 } 946 947 dev_mc_sync(local->mdev, dev); 948} 949 950static const struct header_ops ieee80211_header_ops = { 951 .create = eth_header, 952 .parse = header_parse_80211, 953 .rebuild = eth_rebuild_header, 954 .cache = eth_header_cache, 955 .cache_update = eth_header_cache_update, 956}; 957 958/* Must not be called for mdev */ 959void ieee80211_if_setup(struct net_device *dev) 960{ 961 ether_setup(dev); 962 dev->hard_start_xmit = ieee80211_subif_start_xmit; 963 dev->wireless_handlers = &ieee80211_iw_handler_def; 964 dev->set_multicast_list = ieee80211_set_multicast_list; 965 dev->change_mtu = ieee80211_change_mtu; 966 dev->open = ieee80211_open; 967 dev->stop = ieee80211_stop; 968 dev->destructor = ieee80211_if_free; 969} 970 971/* everything else */ 972 973static int __ieee80211_if_config(struct net_device *dev, 974 struct sk_buff *beacon) 975{ 976 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 977 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 978 struct ieee80211_if_conf conf; 979 980 if (!local->ops->config_interface || !netif_running(dev)) 981 return 0; 982 983 memset(&conf, 0, sizeof(conf)); 984 conf.type = sdata->vif.type; 985 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 986 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 987 conf.bssid = sdata->u.sta.bssid; 988 conf.ssid = sdata->u.sta.ssid; 989 conf.ssid_len = sdata->u.sta.ssid_len; 990 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 991 conf.beacon = beacon; 992 ieee80211_start_mesh(dev); 993 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 994 conf.ssid = sdata->u.ap.ssid; 995 conf.ssid_len = sdata->u.ap.ssid_len; 996 conf.beacon = beacon; 997 } 998 return local->ops->config_interface(local_to_hw(local), 999 &sdata->vif, &conf); 1000} 1001 1002int ieee80211_if_config(struct net_device *dev) 1003{ 1004 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1005 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 1006 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT && 1007 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) 1008 return ieee80211_if_config_beacon(dev); 1009 return __ieee80211_if_config(dev, NULL); 1010} 1011 1012int ieee80211_if_config_beacon(struct net_device *dev) 1013{ 1014 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 1015 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1016 struct sk_buff *skb; 1017 1018 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) 1019 return 0; 1020 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif); 1021 if (!skb) 1022 return -ENOMEM; 1023 return __ieee80211_if_config(dev, skb); 1024} 1025 1026int ieee80211_hw_config(struct ieee80211_local *local) 1027{ 1028 struct ieee80211_channel *chan; 1029 int ret = 0; 1030 1031 if (local->sta_sw_scanning) 1032 chan = local->scan_channel; 1033 else 1034 chan = local->oper_channel; 1035 1036 local->hw.conf.channel = chan; 1037 1038 if (!local->hw.conf.power_level) 1039 local->hw.conf.power_level = chan->max_power; 1040 else 1041 local->hw.conf.power_level = min(chan->max_power, 1042 local->hw.conf.power_level); 1043 1044 local->hw.conf.max_antenna_gain = chan->max_antenna_gain; 1045 1046#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1047 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", 1048 wiphy_name(local->hw.wiphy), chan->center_freq); 1049#endif 1050 1051 if (local->open_count) 1052 ret = local->ops->config(local_to_hw(local), &local->hw.conf); 1053 1054 return ret; 1055} 1056 1057/** 1058 * ieee80211_handle_ht should be used only after legacy configuration 1059 * has been determined namely band, as ht configuration depends upon 1060 * the hardware's HT abilities for a _specific_ band. 1061 */ 1062u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, 1063 struct ieee80211_ht_info *req_ht_cap, 1064 struct ieee80211_ht_bss_info *req_bss_cap) 1065{ 1066 struct ieee80211_conf *conf = &local->hw.conf; 1067 struct ieee80211_supported_band *sband; 1068 struct ieee80211_ht_info ht_conf; 1069 struct ieee80211_ht_bss_info ht_bss_conf; 1070 u32 changed = 0; 1071 int i; 1072 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; 1073 u8 tx_mcs_set_cap; 1074 1075 sband = local->hw.wiphy->bands[conf->channel->band]; 1076 1077 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); 1078 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); 1079 1080 /* HT is not supported */ 1081 if (!sband->ht_info.ht_supported) { 1082 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1083 goto out; 1084 } 1085 1086 /* disable HT */ 1087 if (!enable_ht) { 1088 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) 1089 changed |= BSS_CHANGED_HT; 1090 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1091 conf->ht_conf.ht_supported = 0; 1092 goto out; 1093 } 1094 1095 1096 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) 1097 changed |= BSS_CHANGED_HT; 1098 1099 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; 1100 ht_conf.ht_supported = 1; 1101 1102 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; 1103 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); 1104 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; 1105 ht_bss_conf.primary_channel = req_bss_cap->primary_channel; 1106 ht_bss_conf.bss_cap = req_bss_cap->bss_cap; 1107 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; 1108 1109 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; 1110 ht_conf.ampdu_density = req_ht_cap->ampdu_density; 1111 1112 /* Bits 96-100 */ 1113 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; 1114 1115 /* configure suppoerted Tx MCS according to requested MCS 1116 * (based in most cases on Rx capabilities of peer) and self 1117 * Tx MCS capabilities (as defined by low level driver HW 1118 * Tx capabilities) */ 1119 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) 1120 goto check_changed; 1121 1122 /* Counting from 0 therfore + 1 */ 1123 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) 1124 max_tx_streams = ((tx_mcs_set_cap & 1125 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; 1126 1127 for (i = 0; i < max_tx_streams; i++) 1128 ht_conf.supp_mcs_set[i] = 1129 sband->ht_info.supp_mcs_set[i] & 1130 req_ht_cap->supp_mcs_set[i]; 1131 1132 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) 1133 for (i = IEEE80211_SUPP_MCS_SET_UEQM; 1134 i < IEEE80211_SUPP_MCS_SET_LEN; i++) 1135 ht_conf.supp_mcs_set[i] = 1136 sband->ht_info.supp_mcs_set[i] & 1137 req_ht_cap->supp_mcs_set[i]; 1138 1139check_changed: 1140 /* if bss configuration changed store the new one */ 1141 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || 1142 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { 1143 changed |= BSS_CHANGED_HT; 1144 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); 1145 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); 1146 } 1147out: 1148 return changed; 1149} 1150 1151void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1152 u32 changed) 1153{ 1154 struct ieee80211_local *local = sdata->local; 1155 1156 if (!changed) 1157 return; 1158 1159 if (local->ops->bss_info_changed) 1160 local->ops->bss_info_changed(local_to_hw(local), 1161 &sdata->vif, 1162 &sdata->bss_conf, 1163 changed); 1164} 1165 1166void ieee80211_reset_erp_info(struct net_device *dev) 1167{ 1168 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1169 1170 sdata->bss_conf.use_cts_prot = 0; 1171 sdata->bss_conf.use_short_preamble = 0; 1172 ieee80211_bss_info_change_notify(sdata, 1173 BSS_CHANGED_ERP_CTS_PROT | 1174 BSS_CHANGED_ERP_PREAMBLE); 1175} 1176 1177void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1178 struct sk_buff *skb) 1179{ 1180 struct ieee80211_local *local = hw_to_local(hw); 1181 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1182 int tmp; 1183 1184 skb->dev = local->mdev; 1185 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 1186 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 1187 &local->skb_queue : &local->skb_queue_unreliable, skb); 1188 tmp = skb_queue_len(&local->skb_queue) + 1189 skb_queue_len(&local->skb_queue_unreliable); 1190 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 1191 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1192 dev_kfree_skb_irq(skb); 1193 tmp--; 1194 I802_DEBUG_INC(local->tx_status_drop); 1195 } 1196 tasklet_schedule(&local->tasklet); 1197} 1198EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 1199 1200static void ieee80211_tasklet_handler(unsigned long data) 1201{ 1202 struct ieee80211_local *local = (struct ieee80211_local *) data; 1203 struct sk_buff *skb; 1204 struct ieee80211_rx_status rx_status; 1205 struct ieee80211_ra_tid *ra_tid; 1206 1207 while ((skb = skb_dequeue(&local->skb_queue)) || 1208 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1209 switch (skb->pkt_type) { 1210 case IEEE80211_RX_MSG: 1211 /* status is in skb->cb */ 1212 memcpy(&rx_status, skb->cb, sizeof(rx_status)); 1213 /* Clear skb->pkt_type in order to not confuse kernel 1214 * netstack. */ 1215 skb->pkt_type = 0; 1216 __ieee80211_rx(local_to_hw(local), skb, &rx_status); 1217 break; 1218 case IEEE80211_TX_STATUS_MSG: 1219 skb->pkt_type = 0; 1220 ieee80211_tx_status(local_to_hw(local), skb); 1221 break; 1222 case IEEE80211_DELBA_MSG: 1223 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1224 ieee80211_stop_tx_ba_cb(local_to_hw(local), 1225 ra_tid->ra, ra_tid->tid); 1226 dev_kfree_skb(skb); 1227 break; 1228 case IEEE80211_ADDBA_MSG: 1229 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1230 ieee80211_start_tx_ba_cb(local_to_hw(local), 1231 ra_tid->ra, ra_tid->tid); 1232 dev_kfree_skb(skb); 1233 break ; 1234 default: /* should never get here! */ 1235 printk(KERN_ERR "%s: Unknown message type (%d)\n", 1236 wiphy_name(local->hw.wiphy), skb->pkt_type); 1237 dev_kfree_skb(skb); 1238 break; 1239 } 1240 } 1241} 1242 1243/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to 1244 * make a prepared TX frame (one that has been given to hw) to look like brand 1245 * new IEEE 802.11 frame that is ready to go through TX processing again. 1246 * Also, tx_packet_data in cb is restored from tx_control. */ 1247static void ieee80211_remove_tx_extra(struct ieee80211_local *local, 1248 struct ieee80211_key *key, 1249 struct sk_buff *skb) 1250{ 1251 int hdrlen, iv_len, mic_len; 1252 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1253 1254 info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS | 1255 IEEE80211_TX_CTL_DO_NOT_ENCRYPT | 1256 IEEE80211_TX_CTL_REQUEUE | 1257 IEEE80211_TX_CTL_EAPOL_FRAME; 1258 1259 hdrlen = ieee80211_get_hdrlen_from_skb(skb); 1260 1261 if (!key) 1262 goto no_key; 1263 1264 switch (key->conf.alg) { 1265 case ALG_WEP: 1266 iv_len = WEP_IV_LEN; 1267 mic_len = WEP_ICV_LEN; 1268 break; 1269 case ALG_TKIP: 1270 iv_len = TKIP_IV_LEN; 1271 mic_len = TKIP_ICV_LEN; 1272 break; 1273 case ALG_CCMP: 1274 iv_len = CCMP_HDR_LEN; 1275 mic_len = CCMP_MIC_LEN; 1276 break; 1277 default: 1278 goto no_key; 1279 } 1280 1281 if (skb->len >= mic_len && 1282 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) 1283 skb_trim(skb, skb->len - mic_len); 1284 if (skb->len >= iv_len && skb->len > hdrlen) { 1285 memmove(skb->data + iv_len, skb->data, hdrlen); 1286 skb_pull(skb, iv_len); 1287 } 1288 1289no_key: 1290 { 1291 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1292 u16 fc = le16_to_cpu(hdr->frame_control); 1293 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { 1294 fc &= ~IEEE80211_STYPE_QOS_DATA; 1295 hdr->frame_control = cpu_to_le16(fc); 1296 memmove(skb->data + 2, skb->data, hdrlen - 2); 1297 skb_pull(skb, 2); 1298 } 1299 } 1300} 1301 1302static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 1303 struct sta_info *sta, 1304 struct sk_buff *skb) 1305{ 1306 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1307 1308 sta->tx_filtered_count++; 1309 1310 /* 1311 * Clear the TX filter mask for this STA when sending the next 1312 * packet. If the STA went to power save mode, this will happen 1313 * happen when it wakes up for the next time. 1314 */ 1315 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); 1316 1317 /* 1318 * This code races in the following way: 1319 * 1320 * (1) STA sends frame indicating it will go to sleep and does so 1321 * (2) hardware/firmware adds STA to filter list, passes frame up 1322 * (3) hardware/firmware processes TX fifo and suppresses a frame 1323 * (4) we get TX status before having processed the frame and 1324 * knowing that the STA has gone to sleep. 1325 * 1326 * This is actually quite unlikely even when both those events are 1327 * processed from interrupts coming in quickly after one another or 1328 * even at the same time because we queue both TX status events and 1329 * RX frames to be processed by a tasklet and process them in the 1330 * same order that they were received or TX status last. Hence, there 1331 * is no race as long as the frame RX is processed before the next TX 1332 * status, which drivers can ensure, see below. 1333 * 1334 * Note that this can only happen if the hardware or firmware can 1335 * actually add STAs to the filter list, if this is done by the 1336 * driver in response to set_tim() (which will only reduce the race 1337 * this whole filtering tries to solve, not completely solve it) 1338 * this situation cannot happen. 1339 * 1340 * To completely solve this race drivers need to make sure that they 1341 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 1342 * functions and 1343 * (b) always process RX events before TX status events if ordering 1344 * can be unknown, for example with different interrupt status 1345 * bits. 1346 */ 1347 if (test_sta_flags(sta, WLAN_STA_PS) && 1348 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { 1349 ieee80211_remove_tx_extra(local, sta->key, skb); 1350 skb_queue_tail(&sta->tx_filtered, skb); 1351 return; 1352 } 1353 1354 if (!test_sta_flags(sta, WLAN_STA_PS) && 1355 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { 1356 /* Software retry the packet once */ 1357 info->flags |= IEEE80211_TX_CTL_REQUEUE; 1358 ieee80211_remove_tx_extra(local, sta->key, skb); 1359 dev_queue_xmit(skb); 1360 return; 1361 } 1362 1363 if (net_ratelimit()) 1364 printk(KERN_DEBUG "%s: dropped TX filtered frame, " 1365 "queue_len=%d PS=%d @%lu\n", 1366 wiphy_name(local->hw.wiphy), 1367 skb_queue_len(&sta->tx_filtered), 1368 !!test_sta_flags(sta, WLAN_STA_PS), jiffies); 1369 dev_kfree_skb(skb); 1370} 1371 1372void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1373{ 1374 struct sk_buff *skb2; 1375 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1376 struct ieee80211_local *local = hw_to_local(hw); 1377 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1378 u16 frag, type; 1379 struct ieee80211_tx_status_rtap_hdr *rthdr; 1380 struct ieee80211_sub_if_data *sdata; 1381 struct net_device *prev_dev = NULL; 1382 1383 rcu_read_lock(); 1384 1385 if (info->status.excessive_retries) { 1386 struct sta_info *sta; 1387 sta = sta_info_get(local, hdr->addr1); 1388 if (sta) { 1389 if (test_sta_flags(sta, WLAN_STA_PS)) { 1390 /* 1391 * The STA is in power save mode, so assume 1392 * that this TX packet failed because of that. 1393 */ 1394 ieee80211_handle_filtered_frame(local, sta, skb); 1395 rcu_read_unlock(); 1396 return; 1397 } 1398 } 1399 } 1400 1401 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1402 struct sta_info *sta; 1403 sta = sta_info_get(local, hdr->addr1); 1404 if (sta) { 1405 ieee80211_handle_filtered_frame(local, sta, skb); 1406 rcu_read_unlock(); 1407 return; 1408 } 1409 } else 1410 rate_control_tx_status(local->mdev, skb); 1411 1412 rcu_read_unlock(); 1413 1414 ieee80211_led_tx(local, 0); 1415 1416 /* SNMP counters 1417 * Fragments are passed to low-level drivers as separate skbs, so these 1418 * are actually fragments, not frames. Update frame counters only for 1419 * the first fragment of the frame. */ 1420 1421 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; 1422 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; 1423 1424 if (info->flags & IEEE80211_TX_STAT_ACK) { 1425 if (frag == 0) { 1426 local->dot11TransmittedFrameCount++; 1427 if (is_multicast_ether_addr(hdr->addr1)) 1428 local->dot11MulticastTransmittedFrameCount++; 1429 if (info->status.retry_count > 0) 1430 local->dot11RetryCount++; 1431 if (info->status.retry_count > 1) 1432 local->dot11MultipleRetryCount++; 1433 } 1434 1435 /* This counter shall be incremented for an acknowledged MPDU 1436 * with an individual address in the address 1 field or an MPDU 1437 * with a multicast address in the address 1 field of type Data 1438 * or Management. */ 1439 if (!is_multicast_ether_addr(hdr->addr1) || 1440 type == IEEE80211_FTYPE_DATA || 1441 type == IEEE80211_FTYPE_MGMT) 1442 local->dot11TransmittedFragmentCount++; 1443 } else { 1444 if (frag == 0) 1445 local->dot11FailedCount++; 1446 } 1447 1448 /* this was a transmitted frame, but now we want to reuse it */ 1449 skb_orphan(skb); 1450 1451 /* 1452 * This is a bit racy but we can avoid a lot of work 1453 * with this test... 1454 */ 1455 if (!local->monitors && !local->cooked_mntrs) { 1456 dev_kfree_skb(skb); 1457 return; 1458 } 1459 1460 /* send frame to monitor interfaces now */ 1461 1462 if (skb_headroom(skb) < sizeof(*rthdr)) { 1463 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); 1464 dev_kfree_skb(skb); 1465 return; 1466 } 1467 1468 rthdr = (struct ieee80211_tx_status_rtap_hdr *) 1469 skb_push(skb, sizeof(*rthdr)); 1470 1471 memset(rthdr, 0, sizeof(*rthdr)); 1472 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); 1473 rthdr->hdr.it_present = 1474 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 1475 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 1476 1477 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 1478 !is_multicast_ether_addr(hdr->addr1)) 1479 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); 1480 1481 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && 1482 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) 1483 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); 1484 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) 1485 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); 1486 1487 rthdr->data_retries = info->status.retry_count; 1488 1489 /* XXX: is this sufficient for BPF? */ 1490 skb_set_mac_header(skb, 0); 1491 skb->ip_summed = CHECKSUM_UNNECESSARY; 1492 skb->pkt_type = PACKET_OTHERHOST; 1493 skb->protocol = htons(ETH_P_802_2); 1494 memset(skb->cb, 0, sizeof(skb->cb)); 1495 1496 rcu_read_lock(); 1497 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 1498 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { 1499 if (!netif_running(sdata->dev)) 1500 continue; 1501 1502 if (prev_dev) { 1503 skb2 = skb_clone(skb, GFP_ATOMIC); 1504 if (skb2) { 1505 skb2->dev = prev_dev; 1506 netif_rx(skb2); 1507 } 1508 } 1509 1510 prev_dev = sdata->dev; 1511 } 1512 } 1513 if (prev_dev) { 1514 skb->dev = prev_dev; 1515 netif_rx(skb); 1516 skb = NULL; 1517 } 1518 rcu_read_unlock(); 1519 dev_kfree_skb(skb); 1520} 1521EXPORT_SYMBOL(ieee80211_tx_status); 1522 1523struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1524 const struct ieee80211_ops *ops) 1525{ 1526 struct ieee80211_local *local; 1527 int priv_size; 1528 struct wiphy *wiphy; 1529 1530 /* Ensure 32-byte alignment of our private data and hw private data. 1531 * We use the wiphy priv data for both our ieee80211_local and for 1532 * the driver's private data 1533 * 1534 * In memory it'll be like this: 1535 * 1536 * +-------------------------+ 1537 * | struct wiphy | 1538 * +-------------------------+ 1539 * | struct ieee80211_local | 1540 * +-------------------------+ 1541 * | driver's private data | 1542 * +-------------------------+ 1543 * 1544 */ 1545 priv_size = ((sizeof(struct ieee80211_local) + 1546 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + 1547 priv_data_len; 1548 1549 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 1550 1551 if (!wiphy) 1552 return NULL; 1553 1554 wiphy->privid = mac80211_wiphy_privid; 1555 1556 local = wiphy_priv(wiphy); 1557 local->hw.wiphy = wiphy; 1558 1559 local->hw.priv = (char *)local + 1560 ((sizeof(struct ieee80211_local) + 1561 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); 1562 1563 BUG_ON(!ops->tx); 1564 BUG_ON(!ops->start); 1565 BUG_ON(!ops->stop); 1566 BUG_ON(!ops->config); 1567 BUG_ON(!ops->add_interface); 1568 BUG_ON(!ops->remove_interface); 1569 BUG_ON(!ops->configure_filter); 1570 local->ops = ops; 1571 1572 local->hw.queues = 1; /* default */ 1573 1574 local->bridge_packets = 1; 1575 1576 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; 1577 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; 1578 local->short_retry_limit = 7; 1579 local->long_retry_limit = 4; 1580 local->hw.conf.radio_enabled = 1; 1581 1582 INIT_LIST_HEAD(&local->interfaces); 1583 1584 spin_lock_init(&local->key_lock); 1585 1586 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); 1587 1588 sta_info_init(local); 1589 1590 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 1591 (unsigned long)local); 1592 tasklet_disable(&local->tx_pending_tasklet); 1593 1594 tasklet_init(&local->tasklet, 1595 ieee80211_tasklet_handler, 1596 (unsigned long) local); 1597 tasklet_disable(&local->tasklet); 1598 1599 skb_queue_head_init(&local->skb_queue); 1600 skb_queue_head_init(&local->skb_queue_unreliable); 1601 1602 return local_to_hw(local); 1603} 1604EXPORT_SYMBOL(ieee80211_alloc_hw); 1605 1606int ieee80211_register_hw(struct ieee80211_hw *hw) 1607{ 1608 struct ieee80211_local *local = hw_to_local(hw); 1609 const char *name; 1610 int result; 1611 enum ieee80211_band band; 1612 struct net_device *mdev; 1613 struct ieee80211_sub_if_data *sdata; 1614 1615 /* 1616 * generic code guarantees at least one band, 1617 * set this very early because much code assumes 1618 * that hw.conf.channel is assigned 1619 */ 1620 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1621 struct ieee80211_supported_band *sband; 1622 1623 sband = local->hw.wiphy->bands[band]; 1624 if (sband) { 1625 /* init channel we're on */ 1626 local->hw.conf.channel = 1627 local->oper_channel = 1628 local->scan_channel = &sband->channels[0]; 1629 break; 1630 } 1631 } 1632 1633 result = wiphy_register(local->hw.wiphy); 1634 if (result < 0) 1635 return result; 1636 1637 /* for now, mdev needs sub_if_data :/ */ 1638 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), 1639 "wmaster%d", ether_setup); 1640 if (!mdev) 1641 goto fail_mdev_alloc; 1642 1643 sdata = IEEE80211_DEV_TO_SUB_IF(mdev); 1644 mdev->ieee80211_ptr = &sdata->wdev; 1645 sdata->wdev.wiphy = local->hw.wiphy; 1646 1647 local->mdev = mdev; 1648 1649 ieee80211_rx_bss_list_init(mdev); 1650 1651 mdev->hard_start_xmit = ieee80211_master_start_xmit; 1652 mdev->open = ieee80211_master_open; 1653 mdev->stop = ieee80211_master_stop; 1654 mdev->type = ARPHRD_IEEE80211; 1655 mdev->header_ops = &ieee80211_header_ops; 1656 mdev->set_multicast_list = ieee80211_master_set_multicast_list; 1657 1658 sdata->vif.type = IEEE80211_IF_TYPE_AP; 1659 sdata->dev = mdev; 1660 sdata->local = local; 1661 sdata->u.ap.force_unicast_rateidx = -1; 1662 sdata->u.ap.max_ratectrl_rateidx = -1; 1663 ieee80211_if_sdata_init(sdata); 1664 1665 /* no RCU needed since we're still during init phase */ 1666 list_add_tail(&sdata->list, &local->interfaces); 1667 1668 name = wiphy_dev(local->hw.wiphy)->driver->name; 1669 local->hw.workqueue = create_singlethread_workqueue(name); 1670 if (!local->hw.workqueue) { 1671 result = -ENOMEM; 1672 goto fail_workqueue; 1673 } 1674 1675 /* 1676 * The hardware needs headroom for sending the frame, 1677 * and we need some headroom for passing the frame to monitor 1678 * interfaces, but never both at the same time. 1679 */ 1680 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1681 sizeof(struct ieee80211_tx_status_rtap_hdr)); 1682 1683 debugfs_hw_add(local); 1684 1685 local->hw.conf.beacon_int = 1000; 1686 1687 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | 1688 IEEE80211_HW_SIGNAL_DB | 1689 IEEE80211_HW_SIGNAL_DBM) ? 1690 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; 1691 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? 1692 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; 1693 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 1694 local->wstats_flags |= IW_QUAL_DBM; 1695 1696 result = sta_info_start(local); 1697 if (result < 0) 1698 goto fail_sta_info; 1699 1700 rtnl_lock(); 1701 result = dev_alloc_name(local->mdev, local->mdev->name); 1702 if (result < 0) 1703 goto fail_dev; 1704 1705 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1706 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); 1707 1708 result = register_netdevice(local->mdev); 1709 if (result < 0) 1710 goto fail_dev; 1711 1712 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); 1713 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP); 1714 1715 result = ieee80211_init_rate_ctrl_alg(local, 1716 hw->rate_control_algorithm); 1717 if (result < 0) { 1718 printk(KERN_DEBUG "%s: Failed to initialize rate control " 1719 "algorithm\n", wiphy_name(local->hw.wiphy)); 1720 goto fail_rate; 1721 } 1722 1723 result = ieee80211_wep_init(local); 1724 1725 if (result < 0) { 1726 printk(KERN_DEBUG "%s: Failed to initialize wep\n", 1727 wiphy_name(local->hw.wiphy)); 1728 goto fail_wep; 1729 } 1730 1731 if (hw->queues > IEEE80211_MAX_QUEUES) 1732 hw->queues = IEEE80211_MAX_QUEUES; 1733 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) 1734 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; 1735 1736 ieee80211_install_qdisc(local->mdev); 1737 1738 /* add one default STA interface */ 1739 result = ieee80211_if_add(local->mdev, "wlan%d", NULL, 1740 IEEE80211_IF_TYPE_STA, NULL); 1741 if (result) 1742 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 1743 wiphy_name(local->hw.wiphy)); 1744 1745 local->reg_state = IEEE80211_DEV_REGISTERED; 1746 rtnl_unlock(); 1747 1748 ieee80211_led_init(local); 1749 1750 return 0; 1751 1752fail_wep: 1753 rate_control_deinitialize(local); 1754fail_rate: 1755 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); 1756 unregister_netdevice(local->mdev); 1757 local->mdev = NULL; 1758fail_dev: 1759 rtnl_unlock(); 1760 sta_info_stop(local); 1761fail_sta_info: 1762 debugfs_hw_del(local); 1763 destroy_workqueue(local->hw.workqueue); 1764fail_workqueue: 1765 if (local->mdev != NULL) { 1766 ieee80211_if_free(local->mdev); 1767 local->mdev = NULL; 1768 } 1769fail_mdev_alloc: 1770 wiphy_unregister(local->hw.wiphy); 1771 return result; 1772} 1773EXPORT_SYMBOL(ieee80211_register_hw); 1774 1775void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1776{ 1777 struct ieee80211_local *local = hw_to_local(hw); 1778 struct ieee80211_sub_if_data *sdata, *tmp; 1779 1780 tasklet_kill(&local->tx_pending_tasklet); 1781 tasklet_kill(&local->tasklet); 1782 1783 rtnl_lock(); 1784 1785 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); 1786 1787 local->reg_state = IEEE80211_DEV_UNREGISTERED; 1788 1789 /* 1790 * At this point, interface list manipulations are fine 1791 * because the driver cannot be handing us frames any 1792 * more and the tasklet is killed. 1793 */ 1794 1795 /* 1796 * First, we remove all non-master interfaces. Do this because they 1797 * may have bss pointer dependency on the master, and when we free 1798 * the master these would be freed as well, breaking our list 1799 * iteration completely. 1800 */ 1801 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1802 if (sdata->dev == local->mdev) 1803 continue; 1804 list_del(&sdata->list); 1805 __ieee80211_if_del(local, sdata); 1806 } 1807 1808 /* then, finally, remove the master interface */ 1809 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev)); 1810 1811 rtnl_unlock(); 1812 1813 ieee80211_rx_bss_list_deinit(local->mdev); 1814 ieee80211_clear_tx_pending(local); 1815 sta_info_stop(local); 1816 rate_control_deinitialize(local); 1817 debugfs_hw_del(local); 1818 1819 if (skb_queue_len(&local->skb_queue) 1820 || skb_queue_len(&local->skb_queue_unreliable)) 1821 printk(KERN_WARNING "%s: skb_queue not empty\n", 1822 wiphy_name(local->hw.wiphy)); 1823 skb_queue_purge(&local->skb_queue); 1824 skb_queue_purge(&local->skb_queue_unreliable); 1825 1826 destroy_workqueue(local->hw.workqueue); 1827 wiphy_unregister(local->hw.wiphy); 1828 ieee80211_wep_free(local); 1829 ieee80211_led_exit(local); 1830 ieee80211_if_free(local->mdev); 1831 local->mdev = NULL; 1832} 1833EXPORT_SYMBOL(ieee80211_unregister_hw); 1834 1835void ieee80211_free_hw(struct ieee80211_hw *hw) 1836{ 1837 struct ieee80211_local *local = hw_to_local(hw); 1838 1839 wiphy_free(local->hw.wiphy); 1840} 1841EXPORT_SYMBOL(ieee80211_free_hw); 1842 1843static int __init ieee80211_init(void) 1844{ 1845 struct sk_buff *skb; 1846 int ret; 1847 1848 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1849 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1850 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1851 1852 ret = rc80211_pid_init(); 1853 if (ret) 1854 goto out; 1855 1856 ret = ieee80211_wme_register(); 1857 if (ret) { 1858 printk(KERN_DEBUG "ieee80211_init: failed to " 1859 "initialize WME (err=%d)\n", ret); 1860 goto out_cleanup_pid; 1861 } 1862 1863 ieee80211_debugfs_netdev_init(); 1864 1865 return 0; 1866 1867 out_cleanup_pid: 1868 rc80211_pid_exit(); 1869 out: 1870 return ret; 1871} 1872 1873static void __exit ieee80211_exit(void) 1874{ 1875 rc80211_pid_exit(); 1876 1877 /* 1878 * For key todo, it'll be empty by now but the work 1879 * might still be scheduled. 1880 */ 1881 flush_scheduled_work(); 1882 1883 if (mesh_allocated) 1884 ieee80211s_stop(); 1885 1886 ieee80211_wme_unregister(); 1887 ieee80211_debugfs_netdev_exit(); 1888} 1889 1890 1891subsys_initcall(ieee80211_init); 1892module_exit(ieee80211_exit); 1893 1894MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1895MODULE_LICENSE("GPL"); 1896