main.c revision 3e122be089e6fb8d3f322416da4cdbb80ce12927
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_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 (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; 190 191 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 192 193 /* we hold the RTNL here so can safely walk the list */ 194 list_for_each_entry(nsdata, &local->interfaces, list) { 195 struct net_device *ndev = nsdata->dev; 196 197 if (ndev != dev && netif_running(ndev)) { 198 /* 199 * Allow only a single IBSS interface to be up at any 200 * time. This is restricted because beacon distribution 201 * cannot work properly if both are in the same IBSS. 202 * 203 * To remove this restriction we'd have to disallow them 204 * from setting the same SSID on different IBSS interfaces 205 * belonging to the same hardware. Then, however, we're 206 * faced with having to adopt two different TSF timers... 207 */ 208 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && 209 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) 210 return -EBUSY; 211 212 /* 213 * The remaining checks are only performed for interfaces 214 * with the same MAC address. 215 */ 216 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) 217 continue; 218 219 /* 220 * check whether it may have the same address 221 */ 222 if (!identical_mac_addr_allowed(sdata->vif.type, 223 nsdata->vif.type)) 224 return -ENOTUNIQ; 225 226 /* 227 * can only add VLANs to enabled APs 228 */ 229 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && 230 nsdata->vif.type == IEEE80211_IF_TYPE_AP) 231 sdata->bss = &nsdata->u.ap; 232 } 233 } 234 235 switch (sdata->vif.type) { 236 case IEEE80211_IF_TYPE_WDS: 237 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 238 return -ENOLINK; 239 break; 240 case IEEE80211_IF_TYPE_VLAN: 241 if (!sdata->bss) 242 return -ENOLINK; 243 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 244 break; 245 case IEEE80211_IF_TYPE_AP: 246 sdata->bss = &sdata->u.ap; 247 break; 248 case IEEE80211_IF_TYPE_STA: 249 case IEEE80211_IF_TYPE_MNTR: 250 case IEEE80211_IF_TYPE_IBSS: 251 case IEEE80211_IF_TYPE_MESH_POINT: 252 /* no special treatment */ 253 break; 254 case IEEE80211_IF_TYPE_INVALID: 255 /* cannot happen */ 256 WARN_ON(1); 257 break; 258 } 259 260 if (local->open_count == 0) { 261 res = 0; 262 if (local->ops->start) 263 res = local->ops->start(local_to_hw(local)); 264 if (res) 265 goto err_del_bss; 266 need_hw_reconfig = 1; 267 ieee80211_led_radio(local, local->hw.conf.radio_enabled); 268 } 269 270 switch (sdata->vif.type) { 271 case IEEE80211_IF_TYPE_VLAN: 272 /* no need to tell driver */ 273 break; 274 case IEEE80211_IF_TYPE_MNTR: 275 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 276 local->cooked_mntrs++; 277 break; 278 } 279 280 /* must be before the call to ieee80211_configure_filter */ 281 local->monitors++; 282 if (local->monitors == 1) 283 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; 284 285 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 286 local->fif_fcsfail++; 287 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 288 local->fif_plcpfail++; 289 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 290 local->fif_control++; 291 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 292 local->fif_other_bss++; 293 294 netif_tx_lock_bh(local->mdev); 295 ieee80211_configure_filter(local); 296 netif_tx_unlock_bh(local->mdev); 297 break; 298 case IEEE80211_IF_TYPE_STA: 299 case IEEE80211_IF_TYPE_IBSS: 300 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; 301 /* fall through */ 302 default: 303 conf.vif = &sdata->vif; 304 conf.type = sdata->vif.type; 305 conf.mac_addr = dev->dev_addr; 306 res = local->ops->add_interface(local_to_hw(local), &conf); 307 if (res) 308 goto err_stop; 309 310 ieee80211_if_config(dev); 311 changed |= ieee80211_reset_erp_info(dev); 312 ieee80211_bss_info_change_notify(sdata, changed); 313 ieee80211_enable_keys(sdata); 314 315 if (sdata->vif.type == IEEE80211_IF_TYPE_STA && 316 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) 317 netif_carrier_off(dev); 318 else 319 netif_carrier_on(dev); 320 } 321 322 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { 323 /* Create STA entry for the WDS peer */ 324 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 325 GFP_KERNEL); 326 if (!sta) { 327 res = -ENOMEM; 328 goto err_del_interface; 329 } 330 331 /* no locking required since STA is not live yet */ 332 sta->flags |= WLAN_STA_AUTHORIZED; 333 334 res = sta_info_insert(sta); 335 if (res) { 336 /* STA has been freed */ 337 goto err_del_interface; 338 } 339 } 340 341 if (local->open_count == 0) { 342 res = dev_open(local->mdev); 343 WARN_ON(res); 344 if (res) 345 goto err_del_interface; 346 tasklet_enable(&local->tx_pending_tasklet); 347 tasklet_enable(&local->tasklet); 348 } 349 350 /* 351 * set_multicast_list will be invoked by the networking core 352 * which will check whether any increments here were done in 353 * error and sync them down to the hardware as filter flags. 354 */ 355 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 356 atomic_inc(&local->iff_allmultis); 357 358 if (sdata->flags & IEEE80211_SDATA_PROMISC) 359 atomic_inc(&local->iff_promiscs); 360 361 local->open_count++; 362 if (need_hw_reconfig) 363 ieee80211_hw_config(local); 364 365 /* 366 * ieee80211_sta_work is disabled while network interface 367 * is down. Therefore, some configuration changes may not 368 * yet be effective. Trigger execution of ieee80211_sta_work 369 * to fix this. 370 */ 371 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 372 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 373 struct ieee80211_if_sta *ifsta = &sdata->u.sta; 374 queue_work(local->hw.workqueue, &ifsta->work); 375 } 376 377 netif_start_queue(dev); 378 379 return 0; 380 err_del_interface: 381 local->ops->remove_interface(local_to_hw(local), &conf); 382 err_stop: 383 if (!local->open_count && local->ops->stop) 384 local->ops->stop(local_to_hw(local)); 385 err_del_bss: 386 sdata->bss = NULL; 387 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) 388 list_del(&sdata->u.vlan.list); 389 return res; 390} 391 392static int ieee80211_stop(struct net_device *dev) 393{ 394 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 395 struct ieee80211_local *local = sdata->local; 396 struct ieee80211_if_init_conf conf; 397 struct sta_info *sta; 398 399 /* 400 * Stop TX on this interface first. 401 */ 402 netif_stop_queue(dev); 403 404 /* 405 * Now delete all active aggregation sessions. 406 */ 407 rcu_read_lock(); 408 409 list_for_each_entry_rcu(sta, &local->sta_list, list) { 410 if (sta->sdata == sdata) 411 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr); 412 } 413 414 rcu_read_unlock(); 415 416 /* 417 * Remove all stations associated with this interface. 418 * 419 * This must be done before calling ops->remove_interface() 420 * because otherwise we can later invoke ops->sta_notify() 421 * whenever the STAs are removed, and that invalidates driver 422 * assumptions about always getting a vif pointer that is valid 423 * (because if we remove a STA after ops->remove_interface() 424 * the driver will have removed the vif info already!) 425 * 426 * We could relax this and only unlink the stations from the 427 * hash table and list but keep them on a per-sdata list that 428 * will be inserted back again when the interface is brought 429 * up again, but I don't currently see a use case for that, 430 * except with WDS which gets a STA entry created when it is 431 * brought up. 432 */ 433 sta_info_flush(local, sdata); 434 435 /* 436 * Don't count this interface for promisc/allmulti while it 437 * is down. dev_mc_unsync() will invoke set_multicast_list 438 * on the master interface which will sync these down to the 439 * hardware as filter flags. 440 */ 441 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 442 atomic_dec(&local->iff_allmultis); 443 444 if (sdata->flags & IEEE80211_SDATA_PROMISC) 445 atomic_dec(&local->iff_promiscs); 446 447 dev_mc_unsync(local->mdev, dev); 448 449 /* APs need special treatment */ 450 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 451 struct ieee80211_sub_if_data *vlan, *tmp; 452 struct beacon_data *old_beacon = sdata->u.ap.beacon; 453 454 /* remove beacon */ 455 rcu_assign_pointer(sdata->u.ap.beacon, NULL); 456 synchronize_rcu(); 457 kfree(old_beacon); 458 459 /* down all dependent devices, that is VLANs */ 460 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, 461 u.vlan.list) 462 dev_close(vlan->dev); 463 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 464 } 465 466 local->open_count--; 467 468 switch (sdata->vif.type) { 469 case IEEE80211_IF_TYPE_VLAN: 470 list_del(&sdata->u.vlan.list); 471 /* no need to tell driver */ 472 break; 473 case IEEE80211_IF_TYPE_MNTR: 474 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 475 local->cooked_mntrs--; 476 break; 477 } 478 479 local->monitors--; 480 if (local->monitors == 0) 481 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; 482 483 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) 484 local->fif_fcsfail--; 485 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) 486 local->fif_plcpfail--; 487 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) 488 local->fif_control--; 489 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) 490 local->fif_other_bss--; 491 492 netif_tx_lock_bh(local->mdev); 493 ieee80211_configure_filter(local); 494 netif_tx_unlock_bh(local->mdev); 495 break; 496 case IEEE80211_IF_TYPE_MESH_POINT: 497 case IEEE80211_IF_TYPE_STA: 498 case IEEE80211_IF_TYPE_IBSS: 499 sdata->u.sta.state = IEEE80211_DISABLED; 500 memset(sdata->u.sta.bssid, 0, ETH_ALEN); 501 del_timer_sync(&sdata->u.sta.timer); 502 /* 503 * When we get here, the interface is marked down. 504 * Call synchronize_rcu() to wait for the RX path 505 * should it be using the interface and enqueuing 506 * frames at this very time on another CPU. 507 */ 508 synchronize_rcu(); 509 skb_queue_purge(&sdata->u.sta.skb_queue); 510 511 if (local->scan_dev == sdata->dev) { 512 if (!local->ops->hw_scan) { 513 local->sta_sw_scanning = 0; 514 cancel_delayed_work(&local->scan_work); 515 } else 516 local->sta_hw_scanning = 0; 517 } 518 519 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; 520 kfree(sdata->u.sta.extra_ie); 521 sdata->u.sta.extra_ie = NULL; 522 sdata->u.sta.extra_ie_len = 0; 523 /* fall through */ 524 default: 525 conf.vif = &sdata->vif; 526 conf.type = sdata->vif.type; 527 conf.mac_addr = dev->dev_addr; 528 /* disable all keys for as long as this netdev is down */ 529 ieee80211_disable_keys(sdata); 530 local->ops->remove_interface(local_to_hw(local), &conf); 531 } 532 533 sdata->bss = NULL; 534 535 if (local->open_count == 0) { 536 if (netif_running(local->mdev)) 537 dev_close(local->mdev); 538 539 if (local->ops->stop) 540 local->ops->stop(local_to_hw(local)); 541 542 ieee80211_led_radio(local, 0); 543 544 flush_workqueue(local->hw.workqueue); 545 546 tasklet_disable(&local->tx_pending_tasklet); 547 tasklet_disable(&local->tasklet); 548 } 549 550 return 0; 551} 552 553int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) 554{ 555 struct ieee80211_local *local = hw_to_local(hw); 556 struct netdev_queue *txq; 557 struct sta_info *sta; 558 struct ieee80211_sub_if_data *sdata; 559 u16 start_seq_num = 0; 560 u8 *state; 561 int ret; 562 DECLARE_MAC_BUF(mac); 563 564 if (tid >= STA_TID_NUM) 565 return -EINVAL; 566 567#ifdef CONFIG_MAC80211_HT_DEBUG 568 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", 569 print_mac(mac, ra), tid); 570#endif /* CONFIG_MAC80211_HT_DEBUG */ 571 572 rcu_read_lock(); 573 574 sta = sta_info_get(local, ra); 575 if (!sta) { 576#ifdef CONFIG_MAC80211_HT_DEBUG 577 printk(KERN_DEBUG "Could not find the station\n"); 578#endif 579 ret = -ENOENT; 580 goto exit; 581 } 582 583 spin_lock_bh(&sta->lock); 584 585 /* we have tried too many times, receiver does not want A-MPDU */ 586 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { 587 ret = -EBUSY; 588 goto err_unlock_sta; 589 } 590 591 state = &sta->ampdu_mlme.tid_state_tx[tid]; 592 /* check if the TID is not in aggregation flow already */ 593 if (*state != HT_AGG_STATE_IDLE) { 594#ifdef CONFIG_MAC80211_HT_DEBUG 595 printk(KERN_DEBUG "BA request denied - session is not " 596 "idle on tid %u\n", tid); 597#endif /* CONFIG_MAC80211_HT_DEBUG */ 598 ret = -EAGAIN; 599 goto err_unlock_sta; 600 } 601 602 /* prepare A-MPDU MLME for Tx aggregation */ 603 sta->ampdu_mlme.tid_tx[tid] = 604 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); 605 if (!sta->ampdu_mlme.tid_tx[tid]) { 606#ifdef CONFIG_MAC80211_HT_DEBUG 607 if (net_ratelimit()) 608 printk(KERN_ERR "allocate tx mlme to tid %d failed\n", 609 tid); 610#endif 611 ret = -ENOMEM; 612 goto err_unlock_sta; 613 } 614 /* Tx timer */ 615 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = 616 sta_addba_resp_timer_expired; 617 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = 618 (unsigned long)&sta->timer_to_tid[tid]; 619 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 620 621 /* ensure that TX flow won't interrupt us 622 * until the end of the call to requeue function */ 623 txq = &local->mdev->tx_queue; 624 spin_lock_bh(&txq->lock); 625 626 /* create a new queue for this aggregation */ 627 ret = ieee80211_ht_agg_queue_add(local, sta, tid); 628 629 /* case no queue is available to aggregation 630 * don't switch to aggregation */ 631 if (ret) { 632#ifdef CONFIG_MAC80211_HT_DEBUG 633 printk(KERN_DEBUG "BA request denied - queue unavailable for" 634 " tid %d\n", tid); 635#endif /* CONFIG_MAC80211_HT_DEBUG */ 636 goto err_unlock_queue; 637 } 638 sdata = sta->sdata; 639 640 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the 641 * call back right away, it must see that the flow has begun */ 642 *state |= HT_ADDBA_REQUESTED_MSK; 643 644 if (local->ops->ampdu_action) 645 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, 646 ra, tid, &start_seq_num); 647 648 if (ret) { 649 /* No need to requeue the packets in the agg queue, since we 650 * held the tx lock: no packet could be enqueued to the newly 651 * allocated queue */ 652 ieee80211_ht_agg_queue_remove(local, sta, tid, 0); 653#ifdef CONFIG_MAC80211_HT_DEBUG 654 printk(KERN_DEBUG "BA request denied - HW unavailable for" 655 " tid %d\n", tid); 656#endif /* CONFIG_MAC80211_HT_DEBUG */ 657 *state = HT_AGG_STATE_IDLE; 658 goto err_unlock_queue; 659 } 660 661 /* Will put all the packets in the new SW queue */ 662 ieee80211_requeue(local, ieee802_1d_to_ac[tid]); 663 spin_unlock_bh(&txq->lock); 664 spin_unlock_bh(&sta->lock); 665 666 /* send an addBA request */ 667 sta->ampdu_mlme.dialog_token_allocator++; 668 sta->ampdu_mlme.tid_tx[tid]->dialog_token = 669 sta->ampdu_mlme.dialog_token_allocator; 670 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; 671 672 673 ieee80211_send_addba_request(sta->sdata->dev, ra, tid, 674 sta->ampdu_mlme.tid_tx[tid]->dialog_token, 675 sta->ampdu_mlme.tid_tx[tid]->ssn, 676 0x40, 5000); 677 /* activate the timer for the recipient's addBA response */ 678 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = 679 jiffies + ADDBA_RESP_INTERVAL; 680 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); 681#ifdef CONFIG_MAC80211_HT_DEBUG 682 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); 683#endif 684 goto exit; 685 686err_unlock_queue: 687 kfree(sta->ampdu_mlme.tid_tx[tid]); 688 sta->ampdu_mlme.tid_tx[tid] = NULL; 689 spin_unlock_bh(&txq->lock); 690 ret = -EBUSY; 691err_unlock_sta: 692 spin_unlock_bh(&sta->lock); 693exit: 694 rcu_read_unlock(); 695 return ret; 696} 697EXPORT_SYMBOL(ieee80211_start_tx_ba_session); 698 699int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 700 u8 *ra, u16 tid, 701 enum ieee80211_back_parties initiator) 702{ 703 struct ieee80211_local *local = hw_to_local(hw); 704 struct sta_info *sta; 705 u8 *state; 706 int ret = 0; 707 DECLARE_MAC_BUF(mac); 708 709 if (tid >= STA_TID_NUM) 710 return -EINVAL; 711 712 rcu_read_lock(); 713 sta = sta_info_get(local, ra); 714 if (!sta) { 715 rcu_read_unlock(); 716 return -ENOENT; 717 } 718 719 /* check if the TID is in aggregation */ 720 state = &sta->ampdu_mlme.tid_state_tx[tid]; 721 spin_lock_bh(&sta->lock); 722 723 if (*state != HT_AGG_STATE_OPERATIONAL) { 724 ret = -ENOENT; 725 goto stop_BA_exit; 726 } 727 728#ifdef CONFIG_MAC80211_HT_DEBUG 729 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", 730 print_mac(mac, ra), tid); 731#endif /* CONFIG_MAC80211_HT_DEBUG */ 732 733 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); 734 735 *state = HT_AGG_STATE_REQ_STOP_BA_MSK | 736 (initiator << HT_AGG_STATE_INITIATOR_SHIFT); 737 738 if (local->ops->ampdu_action) 739 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, 740 ra, tid, NULL); 741 742 /* case HW denied going back to legacy */ 743 if (ret) { 744 WARN_ON(ret != -EBUSY); 745 *state = HT_AGG_STATE_OPERATIONAL; 746 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 747 goto stop_BA_exit; 748 } 749 750stop_BA_exit: 751 spin_unlock_bh(&sta->lock); 752 rcu_read_unlock(); 753 return ret; 754} 755EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); 756 757void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) 758{ 759 struct ieee80211_local *local = hw_to_local(hw); 760 struct sta_info *sta; 761 u8 *state; 762 DECLARE_MAC_BUF(mac); 763 764 if (tid >= STA_TID_NUM) { 765#ifdef CONFIG_MAC80211_HT_DEBUG 766 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 767 tid, STA_TID_NUM); 768#endif 769 return; 770 } 771 772 rcu_read_lock(); 773 sta = sta_info_get(local, ra); 774 if (!sta) { 775 rcu_read_unlock(); 776#ifdef CONFIG_MAC80211_HT_DEBUG 777 printk(KERN_DEBUG "Could not find station: %s\n", 778 print_mac(mac, ra)); 779#endif 780 return; 781 } 782 783 state = &sta->ampdu_mlme.tid_state_tx[tid]; 784 spin_lock_bh(&sta->lock); 785 786 if (!(*state & HT_ADDBA_REQUESTED_MSK)) { 787#ifdef CONFIG_MAC80211_HT_DEBUG 788 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", 789 *state); 790#endif 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#ifdef CONFIG_MAC80211_HT_DEBUG 802 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); 803#endif 804 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); 805 } 806 spin_unlock_bh(&sta->lock); 807 rcu_read_unlock(); 808} 809EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); 810 811void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) 812{ 813 struct ieee80211_local *local = hw_to_local(hw); 814 struct netdev_queue *txq; 815 struct sta_info *sta; 816 u8 *state; 817 int agg_queue; 818 DECLARE_MAC_BUF(mac); 819 820 if (tid >= STA_TID_NUM) { 821#ifdef CONFIG_MAC80211_HT_DEBUG 822 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", 823 tid, STA_TID_NUM); 824#endif 825 return; 826 } 827 828#ifdef CONFIG_MAC80211_HT_DEBUG 829 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", 830 print_mac(mac, ra), tid); 831#endif /* CONFIG_MAC80211_HT_DEBUG */ 832 833 rcu_read_lock(); 834 sta = sta_info_get(local, ra); 835 if (!sta) { 836#ifdef CONFIG_MAC80211_HT_DEBUG 837 printk(KERN_DEBUG "Could not find station: %s\n", 838 print_mac(mac, ra)); 839#endif 840 rcu_read_unlock(); 841 return; 842 } 843 state = &sta->ampdu_mlme.tid_state_tx[tid]; 844 845 /* NOTE: no need to use sta->lock in this state check, as 846 * ieee80211_stop_tx_ba_session will let only 847 * one stop call to pass through per sta/tid */ 848 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { 849#ifdef CONFIG_MAC80211_HT_DEBUG 850 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); 851#endif 852 rcu_read_unlock(); 853 return; 854 } 855 856 if (*state & HT_AGG_STATE_INITIATOR_MSK) 857 ieee80211_send_delba(sta->sdata->dev, ra, tid, 858 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); 859 860 agg_queue = sta->tid_to_tx_q[tid]; 861 862 /* avoid ordering issues: we are the only one that can modify 863 * the content of the qdiscs */ 864 txq = &local->mdev->tx_queue; 865 spin_lock_bh(&txq->lock); 866 /* remove the queue for this aggregation */ 867 ieee80211_ht_agg_queue_remove(local, sta, tid, 1); 868 spin_unlock_bh(&txq->lock); 869 870 /* we just requeued the all the frames that were in the removed 871 * queue, and since we might miss a softirq we do netif_schedule_queue. 872 * ieee80211_wake_queue is not used here as this queue is not 873 * necessarily stopped */ 874 netif_schedule_queue(txq); 875 spin_lock_bh(&sta->lock); 876 *state = HT_AGG_STATE_IDLE; 877 sta->ampdu_mlme.addba_req_num[tid] = 0; 878 kfree(sta->ampdu_mlme.tid_tx[tid]); 879 sta->ampdu_mlme.tid_tx[tid] = NULL; 880 spin_unlock_bh(&sta->lock); 881 882 rcu_read_unlock(); 883} 884EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); 885 886void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 887 const u8 *ra, u16 tid) 888{ 889 struct ieee80211_local *local = hw_to_local(hw); 890 struct ieee80211_ra_tid *ra_tid; 891 struct sk_buff *skb = dev_alloc_skb(0); 892 893 if (unlikely(!skb)) { 894#ifdef CONFIG_MAC80211_HT_DEBUG 895 if (net_ratelimit()) 896 printk(KERN_WARNING "%s: Not enough memory, " 897 "dropping start BA session", skb->dev->name); 898#endif 899 return; 900 } 901 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 902 memcpy(&ra_tid->ra, ra, ETH_ALEN); 903 ra_tid->tid = tid; 904 905 skb->pkt_type = IEEE80211_ADDBA_MSG; 906 skb_queue_tail(&local->skb_queue, skb); 907 tasklet_schedule(&local->tasklet); 908} 909EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); 910 911void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, 912 const u8 *ra, u16 tid) 913{ 914 struct ieee80211_local *local = hw_to_local(hw); 915 struct ieee80211_ra_tid *ra_tid; 916 struct sk_buff *skb = dev_alloc_skb(0); 917 918 if (unlikely(!skb)) { 919#ifdef CONFIG_MAC80211_HT_DEBUG 920 if (net_ratelimit()) 921 printk(KERN_WARNING "%s: Not enough memory, " 922 "dropping stop BA session", skb->dev->name); 923#endif 924 return; 925 } 926 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 927 memcpy(&ra_tid->ra, ra, ETH_ALEN); 928 ra_tid->tid = tid; 929 930 skb->pkt_type = IEEE80211_DELBA_MSG; 931 skb_queue_tail(&local->skb_queue, skb); 932 tasklet_schedule(&local->tasklet); 933} 934EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); 935 936static void ieee80211_set_multicast_list(struct net_device *dev) 937{ 938 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 939 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 940 int allmulti, promisc, sdata_allmulti, sdata_promisc; 941 942 allmulti = !!(dev->flags & IFF_ALLMULTI); 943 promisc = !!(dev->flags & IFF_PROMISC); 944 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 945 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 946 947 if (allmulti != sdata_allmulti) { 948 if (dev->flags & IFF_ALLMULTI) 949 atomic_inc(&local->iff_allmultis); 950 else 951 atomic_dec(&local->iff_allmultis); 952 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 953 } 954 955 if (promisc != sdata_promisc) { 956 if (dev->flags & IFF_PROMISC) 957 atomic_inc(&local->iff_promiscs); 958 else 959 atomic_dec(&local->iff_promiscs); 960 sdata->flags ^= IEEE80211_SDATA_PROMISC; 961 } 962 963 dev_mc_sync(local->mdev, dev); 964} 965 966static const struct header_ops ieee80211_header_ops = { 967 .create = eth_header, 968 .parse = header_parse_80211, 969 .rebuild = eth_rebuild_header, 970 .cache = eth_header_cache, 971 .cache_update = eth_header_cache_update, 972}; 973 974/* Must not be called for mdev */ 975void ieee80211_if_setup(struct net_device *dev) 976{ 977 ether_setup(dev); 978 dev->hard_start_xmit = ieee80211_subif_start_xmit; 979 dev->wireless_handlers = &ieee80211_iw_handler_def; 980 dev->set_multicast_list = ieee80211_set_multicast_list; 981 dev->change_mtu = ieee80211_change_mtu; 982 dev->open = ieee80211_open; 983 dev->stop = ieee80211_stop; 984 dev->destructor = ieee80211_if_free; 985} 986 987/* everything else */ 988 989static int __ieee80211_if_config(struct net_device *dev, 990 struct sk_buff *beacon) 991{ 992 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 993 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 994 struct ieee80211_if_conf conf; 995 996 if (!local->ops->config_interface || !netif_running(dev)) 997 return 0; 998 999 memset(&conf, 0, sizeof(conf)); 1000 conf.type = sdata->vif.type; 1001 if (sdata->vif.type == IEEE80211_IF_TYPE_STA || 1002 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { 1003 conf.bssid = sdata->u.sta.bssid; 1004 conf.ssid = sdata->u.sta.ssid; 1005 conf.ssid_len = sdata->u.sta.ssid_len; 1006 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 1007 conf.beacon = beacon; 1008 ieee80211_start_mesh(dev); 1009 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { 1010 conf.ssid = sdata->u.ap.ssid; 1011 conf.ssid_len = sdata->u.ap.ssid_len; 1012 conf.beacon = beacon; 1013 } 1014 return local->ops->config_interface(local_to_hw(local), 1015 &sdata->vif, &conf); 1016} 1017 1018int ieee80211_if_config(struct net_device *dev) 1019{ 1020 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1021 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 1022 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT && 1023 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) 1024 return ieee80211_if_config_beacon(dev); 1025 return __ieee80211_if_config(dev, NULL); 1026} 1027 1028int ieee80211_if_config_beacon(struct net_device *dev) 1029{ 1030 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 1031 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1032 struct sk_buff *skb; 1033 1034 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) 1035 return 0; 1036 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif); 1037 if (!skb) 1038 return -ENOMEM; 1039 return __ieee80211_if_config(dev, skb); 1040} 1041 1042int ieee80211_hw_config(struct ieee80211_local *local) 1043{ 1044 struct ieee80211_channel *chan; 1045 int ret = 0; 1046 1047 if (local->sta_sw_scanning) 1048 chan = local->scan_channel; 1049 else 1050 chan = local->oper_channel; 1051 1052 local->hw.conf.channel = chan; 1053 1054 if (!local->hw.conf.power_level) 1055 local->hw.conf.power_level = chan->max_power; 1056 else 1057 local->hw.conf.power_level = min(chan->max_power, 1058 local->hw.conf.power_level); 1059 1060 local->hw.conf.max_antenna_gain = chan->max_antenna_gain; 1061 1062#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1063 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", 1064 wiphy_name(local->hw.wiphy), chan->center_freq); 1065#endif 1066 1067 if (local->open_count) 1068 ret = local->ops->config(local_to_hw(local), &local->hw.conf); 1069 1070 return ret; 1071} 1072 1073/** 1074 * ieee80211_handle_ht should be used only after legacy configuration 1075 * has been determined namely band, as ht configuration depends upon 1076 * the hardware's HT abilities for a _specific_ band. 1077 */ 1078u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, 1079 struct ieee80211_ht_info *req_ht_cap, 1080 struct ieee80211_ht_bss_info *req_bss_cap) 1081{ 1082 struct ieee80211_conf *conf = &local->hw.conf; 1083 struct ieee80211_supported_band *sband; 1084 struct ieee80211_ht_info ht_conf; 1085 struct ieee80211_ht_bss_info ht_bss_conf; 1086 u32 changed = 0; 1087 int i; 1088 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; 1089 u8 tx_mcs_set_cap; 1090 1091 sband = local->hw.wiphy->bands[conf->channel->band]; 1092 1093 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); 1094 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); 1095 1096 /* HT is not supported */ 1097 if (!sband->ht_info.ht_supported) { 1098 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1099 goto out; 1100 } 1101 1102 /* disable HT */ 1103 if (!enable_ht) { 1104 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) 1105 changed |= BSS_CHANGED_HT; 1106 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; 1107 conf->ht_conf.ht_supported = 0; 1108 goto out; 1109 } 1110 1111 1112 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) 1113 changed |= BSS_CHANGED_HT; 1114 1115 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; 1116 ht_conf.ht_supported = 1; 1117 1118 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; 1119 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); 1120 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; 1121 ht_bss_conf.primary_channel = req_bss_cap->primary_channel; 1122 ht_bss_conf.bss_cap = req_bss_cap->bss_cap; 1123 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; 1124 1125 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; 1126 ht_conf.ampdu_density = req_ht_cap->ampdu_density; 1127 1128 /* Bits 96-100 */ 1129 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; 1130 1131 /* configure suppoerted Tx MCS according to requested MCS 1132 * (based in most cases on Rx capabilities of peer) and self 1133 * Tx MCS capabilities (as defined by low level driver HW 1134 * Tx capabilities) */ 1135 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) 1136 goto check_changed; 1137 1138 /* Counting from 0 therfore + 1 */ 1139 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) 1140 max_tx_streams = ((tx_mcs_set_cap & 1141 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; 1142 1143 for (i = 0; i < max_tx_streams; i++) 1144 ht_conf.supp_mcs_set[i] = 1145 sband->ht_info.supp_mcs_set[i] & 1146 req_ht_cap->supp_mcs_set[i]; 1147 1148 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) 1149 for (i = IEEE80211_SUPP_MCS_SET_UEQM; 1150 i < IEEE80211_SUPP_MCS_SET_LEN; i++) 1151 ht_conf.supp_mcs_set[i] = 1152 sband->ht_info.supp_mcs_set[i] & 1153 req_ht_cap->supp_mcs_set[i]; 1154 1155check_changed: 1156 /* if bss configuration changed store the new one */ 1157 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || 1158 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { 1159 changed |= BSS_CHANGED_HT; 1160 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); 1161 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); 1162 } 1163out: 1164 return changed; 1165} 1166 1167void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1168 u32 changed) 1169{ 1170 struct ieee80211_local *local = sdata->local; 1171 1172 if (!changed) 1173 return; 1174 1175 if (local->ops->bss_info_changed) 1176 local->ops->bss_info_changed(local_to_hw(local), 1177 &sdata->vif, 1178 &sdata->bss_conf, 1179 changed); 1180} 1181 1182u32 ieee80211_reset_erp_info(struct net_device *dev) 1183{ 1184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1185 1186 sdata->bss_conf.use_cts_prot = 0; 1187 sdata->bss_conf.use_short_preamble = 0; 1188 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE; 1189} 1190 1191void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1192 struct sk_buff *skb) 1193{ 1194 struct ieee80211_local *local = hw_to_local(hw); 1195 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1196 int tmp; 1197 1198 skb->dev = local->mdev; 1199 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 1200 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 1201 &local->skb_queue : &local->skb_queue_unreliable, skb); 1202 tmp = skb_queue_len(&local->skb_queue) + 1203 skb_queue_len(&local->skb_queue_unreliable); 1204 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 1205 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1206 dev_kfree_skb_irq(skb); 1207 tmp--; 1208 I802_DEBUG_INC(local->tx_status_drop); 1209 } 1210 tasklet_schedule(&local->tasklet); 1211} 1212EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 1213 1214static void ieee80211_tasklet_handler(unsigned long data) 1215{ 1216 struct ieee80211_local *local = (struct ieee80211_local *) data; 1217 struct sk_buff *skb; 1218 struct ieee80211_rx_status rx_status; 1219 struct ieee80211_ra_tid *ra_tid; 1220 1221 while ((skb = skb_dequeue(&local->skb_queue)) || 1222 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 1223 switch (skb->pkt_type) { 1224 case IEEE80211_RX_MSG: 1225 /* status is in skb->cb */ 1226 memcpy(&rx_status, skb->cb, sizeof(rx_status)); 1227 /* Clear skb->pkt_type in order to not confuse kernel 1228 * netstack. */ 1229 skb->pkt_type = 0; 1230 __ieee80211_rx(local_to_hw(local), skb, &rx_status); 1231 break; 1232 case IEEE80211_TX_STATUS_MSG: 1233 skb->pkt_type = 0; 1234 ieee80211_tx_status(local_to_hw(local), skb); 1235 break; 1236 case IEEE80211_DELBA_MSG: 1237 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1238 ieee80211_stop_tx_ba_cb(local_to_hw(local), 1239 ra_tid->ra, ra_tid->tid); 1240 dev_kfree_skb(skb); 1241 break; 1242 case IEEE80211_ADDBA_MSG: 1243 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 1244 ieee80211_start_tx_ba_cb(local_to_hw(local), 1245 ra_tid->ra, ra_tid->tid); 1246 dev_kfree_skb(skb); 1247 break ; 1248 default: 1249 WARN_ON(1); 1250 dev_kfree_skb(skb); 1251 break; 1252 } 1253 } 1254} 1255 1256/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to 1257 * make a prepared TX frame (one that has been given to hw) to look like brand 1258 * new IEEE 802.11 frame that is ready to go through TX processing again. 1259 * Also, tx_packet_data in cb is restored from tx_control. */ 1260static void ieee80211_remove_tx_extra(struct ieee80211_local *local, 1261 struct ieee80211_key *key, 1262 struct sk_buff *skb) 1263{ 1264 int hdrlen, iv_len, mic_len; 1265 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1266 1267 info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS | 1268 IEEE80211_TX_CTL_DO_NOT_ENCRYPT | 1269 IEEE80211_TX_CTL_REQUEUE | 1270 IEEE80211_TX_CTL_EAPOL_FRAME; 1271 1272 hdrlen = ieee80211_get_hdrlen_from_skb(skb); 1273 1274 if (!key) 1275 goto no_key; 1276 1277 switch (key->conf.alg) { 1278 case ALG_WEP: 1279 iv_len = WEP_IV_LEN; 1280 mic_len = WEP_ICV_LEN; 1281 break; 1282 case ALG_TKIP: 1283 iv_len = TKIP_IV_LEN; 1284 mic_len = TKIP_ICV_LEN; 1285 break; 1286 case ALG_CCMP: 1287 iv_len = CCMP_HDR_LEN; 1288 mic_len = CCMP_MIC_LEN; 1289 break; 1290 default: 1291 goto no_key; 1292 } 1293 1294 if (skb->len >= mic_len && 1295 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) 1296 skb_trim(skb, skb->len - mic_len); 1297 if (skb->len >= iv_len && skb->len > hdrlen) { 1298 memmove(skb->data + iv_len, skb->data, hdrlen); 1299 skb_pull(skb, iv_len); 1300 } 1301 1302no_key: 1303 { 1304 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1305 u16 fc = le16_to_cpu(hdr->frame_control); 1306 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { 1307 fc &= ~IEEE80211_STYPE_QOS_DATA; 1308 hdr->frame_control = cpu_to_le16(fc); 1309 memmove(skb->data + 2, skb->data, hdrlen - 2); 1310 skb_pull(skb, 2); 1311 } 1312 } 1313} 1314 1315static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 1316 struct sta_info *sta, 1317 struct sk_buff *skb) 1318{ 1319 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1320 1321 sta->tx_filtered_count++; 1322 1323 /* 1324 * Clear the TX filter mask for this STA when sending the next 1325 * packet. If the STA went to power save mode, this will happen 1326 * when it wakes up for the next time. 1327 */ 1328 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); 1329 1330 /* 1331 * This code races in the following way: 1332 * 1333 * (1) STA sends frame indicating it will go to sleep and does so 1334 * (2) hardware/firmware adds STA to filter list, passes frame up 1335 * (3) hardware/firmware processes TX fifo and suppresses a frame 1336 * (4) we get TX status before having processed the frame and 1337 * knowing that the STA has gone to sleep. 1338 * 1339 * This is actually quite unlikely even when both those events are 1340 * processed from interrupts coming in quickly after one another or 1341 * even at the same time because we queue both TX status events and 1342 * RX frames to be processed by a tasklet and process them in the 1343 * same order that they were received or TX status last. Hence, there 1344 * is no race as long as the frame RX is processed before the next TX 1345 * status, which drivers can ensure, see below. 1346 * 1347 * Note that this can only happen if the hardware or firmware can 1348 * actually add STAs to the filter list, if this is done by the 1349 * driver in response to set_tim() (which will only reduce the race 1350 * this whole filtering tries to solve, not completely solve it) 1351 * this situation cannot happen. 1352 * 1353 * To completely solve this race drivers need to make sure that they 1354 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 1355 * functions and 1356 * (b) always process RX events before TX status events if ordering 1357 * can be unknown, for example with different interrupt status 1358 * bits. 1359 */ 1360 if (test_sta_flags(sta, WLAN_STA_PS) && 1361 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { 1362 ieee80211_remove_tx_extra(local, sta->key, skb); 1363 skb_queue_tail(&sta->tx_filtered, skb); 1364 return; 1365 } 1366 1367 if (!test_sta_flags(sta, WLAN_STA_PS) && 1368 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { 1369 /* Software retry the packet once */ 1370 info->flags |= IEEE80211_TX_CTL_REQUEUE; 1371 ieee80211_remove_tx_extra(local, sta->key, skb); 1372 dev_queue_xmit(skb); 1373 return; 1374 } 1375 1376#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1377 if (net_ratelimit()) 1378 printk(KERN_DEBUG "%s: dropped TX filtered frame, " 1379 "queue_len=%d PS=%d @%lu\n", 1380 wiphy_name(local->hw.wiphy), 1381 skb_queue_len(&sta->tx_filtered), 1382 !!test_sta_flags(sta, WLAN_STA_PS), jiffies); 1383#endif 1384 dev_kfree_skb(skb); 1385} 1386 1387void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1388{ 1389 struct sk_buff *skb2; 1390 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1391 struct ieee80211_local *local = hw_to_local(hw); 1392 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1393 u16 frag, type; 1394 __le16 fc; 1395 struct ieee80211_tx_status_rtap_hdr *rthdr; 1396 struct ieee80211_sub_if_data *sdata; 1397 struct net_device *prev_dev = NULL; 1398 struct sta_info *sta; 1399 1400 rcu_read_lock(); 1401 1402 if (info->status.excessive_retries) { 1403 sta = sta_info_get(local, hdr->addr1); 1404 if (sta) { 1405 if (test_sta_flags(sta, WLAN_STA_PS)) { 1406 /* 1407 * The STA is in power save mode, so assume 1408 * that this TX packet failed because of that. 1409 */ 1410 ieee80211_handle_filtered_frame(local, sta, skb); 1411 rcu_read_unlock(); 1412 return; 1413 } 1414 } 1415 } 1416 1417 fc = hdr->frame_control; 1418 1419 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 1420 (ieee80211_is_data_qos(fc))) { 1421 u16 tid, ssn; 1422 u8 *qc; 1423 sta = sta_info_get(local, hdr->addr1); 1424 if (sta) { 1425 qc = ieee80211_get_qos_ctl(hdr); 1426 tid = qc[0] & 0xf; 1427 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 1428 & IEEE80211_SCTL_SEQ); 1429 ieee80211_send_bar(sta->sdata->dev, hdr->addr1, 1430 tid, ssn); 1431 } 1432 } 1433 1434 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1435 sta = sta_info_get(local, hdr->addr1); 1436 if (sta) { 1437 ieee80211_handle_filtered_frame(local, sta, skb); 1438 rcu_read_unlock(); 1439 return; 1440 } 1441 } else 1442 rate_control_tx_status(local->mdev, skb); 1443 1444 rcu_read_unlock(); 1445 1446 ieee80211_led_tx(local, 0); 1447 1448 /* SNMP counters 1449 * Fragments are passed to low-level drivers as separate skbs, so these 1450 * are actually fragments, not frames. Update frame counters only for 1451 * the first fragment of the frame. */ 1452 1453 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; 1454 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; 1455 1456 if (info->flags & IEEE80211_TX_STAT_ACK) { 1457 if (frag == 0) { 1458 local->dot11TransmittedFrameCount++; 1459 if (is_multicast_ether_addr(hdr->addr1)) 1460 local->dot11MulticastTransmittedFrameCount++; 1461 if (info->status.retry_count > 0) 1462 local->dot11RetryCount++; 1463 if (info->status.retry_count > 1) 1464 local->dot11MultipleRetryCount++; 1465 } 1466 1467 /* This counter shall be incremented for an acknowledged MPDU 1468 * with an individual address in the address 1 field or an MPDU 1469 * with a multicast address in the address 1 field of type Data 1470 * or Management. */ 1471 if (!is_multicast_ether_addr(hdr->addr1) || 1472 type == IEEE80211_FTYPE_DATA || 1473 type == IEEE80211_FTYPE_MGMT) 1474 local->dot11TransmittedFragmentCount++; 1475 } else { 1476 if (frag == 0) 1477 local->dot11FailedCount++; 1478 } 1479 1480 /* this was a transmitted frame, but now we want to reuse it */ 1481 skb_orphan(skb); 1482 1483 /* 1484 * This is a bit racy but we can avoid a lot of work 1485 * with this test... 1486 */ 1487 if (!local->monitors && !local->cooked_mntrs) { 1488 dev_kfree_skb(skb); 1489 return; 1490 } 1491 1492 /* send frame to monitor interfaces now */ 1493 1494 if (skb_headroom(skb) < sizeof(*rthdr)) { 1495 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); 1496 dev_kfree_skb(skb); 1497 return; 1498 } 1499 1500 rthdr = (struct ieee80211_tx_status_rtap_hdr *) 1501 skb_push(skb, sizeof(*rthdr)); 1502 1503 memset(rthdr, 0, sizeof(*rthdr)); 1504 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); 1505 rthdr->hdr.it_present = 1506 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 1507 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 1508 1509 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 1510 !is_multicast_ether_addr(hdr->addr1)) 1511 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); 1512 1513 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && 1514 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) 1515 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); 1516 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) 1517 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); 1518 1519 rthdr->data_retries = info->status.retry_count; 1520 1521 /* XXX: is this sufficient for BPF? */ 1522 skb_set_mac_header(skb, 0); 1523 skb->ip_summed = CHECKSUM_UNNECESSARY; 1524 skb->pkt_type = PACKET_OTHERHOST; 1525 skb->protocol = htons(ETH_P_802_2); 1526 memset(skb->cb, 0, sizeof(skb->cb)); 1527 1528 rcu_read_lock(); 1529 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 1530 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { 1531 if (!netif_running(sdata->dev)) 1532 continue; 1533 1534 if (prev_dev) { 1535 skb2 = skb_clone(skb, GFP_ATOMIC); 1536 if (skb2) { 1537 skb2->dev = prev_dev; 1538 netif_rx(skb2); 1539 } 1540 } 1541 1542 prev_dev = sdata->dev; 1543 } 1544 } 1545 if (prev_dev) { 1546 skb->dev = prev_dev; 1547 netif_rx(skb); 1548 skb = NULL; 1549 } 1550 rcu_read_unlock(); 1551 dev_kfree_skb(skb); 1552} 1553EXPORT_SYMBOL(ieee80211_tx_status); 1554 1555struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1556 const struct ieee80211_ops *ops) 1557{ 1558 struct ieee80211_local *local; 1559 int priv_size; 1560 struct wiphy *wiphy; 1561 1562 /* Ensure 32-byte alignment of our private data and hw private data. 1563 * We use the wiphy priv data for both our ieee80211_local and for 1564 * the driver's private data 1565 * 1566 * In memory it'll be like this: 1567 * 1568 * +-------------------------+ 1569 * | struct wiphy | 1570 * +-------------------------+ 1571 * | struct ieee80211_local | 1572 * +-------------------------+ 1573 * | driver's private data | 1574 * +-------------------------+ 1575 * 1576 */ 1577 priv_size = ((sizeof(struct ieee80211_local) + 1578 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + 1579 priv_data_len; 1580 1581 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 1582 1583 if (!wiphy) 1584 return NULL; 1585 1586 wiphy->privid = mac80211_wiphy_privid; 1587 1588 local = wiphy_priv(wiphy); 1589 local->hw.wiphy = wiphy; 1590 1591 local->hw.priv = (char *)local + 1592 ((sizeof(struct ieee80211_local) + 1593 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); 1594 1595 BUG_ON(!ops->tx); 1596 BUG_ON(!ops->start); 1597 BUG_ON(!ops->stop); 1598 BUG_ON(!ops->config); 1599 BUG_ON(!ops->add_interface); 1600 BUG_ON(!ops->remove_interface); 1601 BUG_ON(!ops->configure_filter); 1602 local->ops = ops; 1603 1604 local->hw.queues = 1; /* default */ 1605 1606 local->bridge_packets = 1; 1607 1608 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; 1609 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; 1610 local->short_retry_limit = 7; 1611 local->long_retry_limit = 4; 1612 local->hw.conf.radio_enabled = 1; 1613 1614 INIT_LIST_HEAD(&local->interfaces); 1615 1616 spin_lock_init(&local->key_lock); 1617 1618 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); 1619 1620 sta_info_init(local); 1621 1622 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 1623 (unsigned long)local); 1624 tasklet_disable(&local->tx_pending_tasklet); 1625 1626 tasklet_init(&local->tasklet, 1627 ieee80211_tasklet_handler, 1628 (unsigned long) local); 1629 tasklet_disable(&local->tasklet); 1630 1631 skb_queue_head_init(&local->skb_queue); 1632 skb_queue_head_init(&local->skb_queue_unreliable); 1633 1634 return local_to_hw(local); 1635} 1636EXPORT_SYMBOL(ieee80211_alloc_hw); 1637 1638int ieee80211_register_hw(struct ieee80211_hw *hw) 1639{ 1640 struct ieee80211_local *local = hw_to_local(hw); 1641 const char *name; 1642 int result; 1643 enum ieee80211_band band; 1644 struct net_device *mdev; 1645 struct wireless_dev *mwdev; 1646 1647 /* 1648 * generic code guarantees at least one band, 1649 * set this very early because much code assumes 1650 * that hw.conf.channel is assigned 1651 */ 1652 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1653 struct ieee80211_supported_band *sband; 1654 1655 sband = local->hw.wiphy->bands[band]; 1656 if (sband) { 1657 /* init channel we're on */ 1658 local->hw.conf.channel = 1659 local->oper_channel = 1660 local->scan_channel = &sband->channels[0]; 1661 break; 1662 } 1663 } 1664 1665 result = wiphy_register(local->hw.wiphy); 1666 if (result < 0) 1667 return result; 1668 1669 /* 1670 * We use the number of queues for feature tests (QoS, HT) internally 1671 * so restrict them appropriately. 1672 */ 1673#ifdef CONFIG_MAC80211_QOS 1674 if (hw->queues > IEEE80211_MAX_QUEUES) 1675 hw->queues = IEEE80211_MAX_QUEUES; 1676 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) 1677 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; 1678 if (hw->queues < 4) 1679 hw->ampdu_queues = 0; 1680#else 1681 hw->queues = 1; 1682 hw->ampdu_queues = 0; 1683#endif 1684 1685 mdev = alloc_netdev_mq(sizeof(struct wireless_dev), 1686 "wmaster%d", ether_setup, 1687 ieee80211_num_queues(hw)); 1688 if (!mdev) 1689 goto fail_mdev_alloc; 1690 1691 if (ieee80211_num_queues(hw) > 1) 1692 mdev->features |= NETIF_F_MULTI_QUEUE; 1693 1694 mwdev = netdev_priv(mdev); 1695 mdev->ieee80211_ptr = mwdev; 1696 mwdev->wiphy = local->hw.wiphy; 1697 1698 local->mdev = mdev; 1699 1700 ieee80211_rx_bss_list_init(local); 1701 1702 mdev->hard_start_xmit = ieee80211_master_start_xmit; 1703 mdev->open = ieee80211_master_open; 1704 mdev->stop = ieee80211_master_stop; 1705 mdev->type = ARPHRD_IEEE80211; 1706 mdev->header_ops = &ieee80211_header_ops; 1707 mdev->set_multicast_list = ieee80211_master_set_multicast_list; 1708 1709 name = wiphy_dev(local->hw.wiphy)->driver->name; 1710 local->hw.workqueue = create_freezeable_workqueue(name); 1711 if (!local->hw.workqueue) { 1712 result = -ENOMEM; 1713 goto fail_workqueue; 1714 } 1715 1716 /* 1717 * The hardware needs headroom for sending the frame, 1718 * and we need some headroom for passing the frame to monitor 1719 * interfaces, but never both at the same time. 1720 */ 1721 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1722 sizeof(struct ieee80211_tx_status_rtap_hdr)); 1723 1724 debugfs_hw_add(local); 1725 1726 if (local->hw.conf.beacon_int < 10) 1727 local->hw.conf.beacon_int = 100; 1728 1729 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | 1730 IEEE80211_HW_SIGNAL_DB | 1731 IEEE80211_HW_SIGNAL_DBM) ? 1732 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; 1733 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? 1734 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; 1735 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 1736 local->wstats_flags |= IW_QUAL_DBM; 1737 1738 result = sta_info_start(local); 1739 if (result < 0) 1740 goto fail_sta_info; 1741 1742 rtnl_lock(); 1743 result = dev_alloc_name(local->mdev, local->mdev->name); 1744 if (result < 0) 1745 goto fail_dev; 1746 1747 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1748 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); 1749 1750 result = register_netdevice(local->mdev); 1751 if (result < 0) 1752 goto fail_dev; 1753 1754 result = ieee80211_init_rate_ctrl_alg(local, 1755 hw->rate_control_algorithm); 1756 if (result < 0) { 1757 printk(KERN_DEBUG "%s: Failed to initialize rate control " 1758 "algorithm\n", wiphy_name(local->hw.wiphy)); 1759 goto fail_rate; 1760 } 1761 1762 result = ieee80211_wep_init(local); 1763 1764 if (result < 0) { 1765 printk(KERN_DEBUG "%s: Failed to initialize wep\n", 1766 wiphy_name(local->hw.wiphy)); 1767 goto fail_wep; 1768 } 1769 1770 ieee80211_install_qdisc(local->mdev); 1771 1772 /* add one default STA interface */ 1773 result = ieee80211_if_add(local, "wlan%d", NULL, 1774 IEEE80211_IF_TYPE_STA, NULL); 1775 if (result) 1776 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 1777 wiphy_name(local->hw.wiphy)); 1778 1779 local->reg_state = IEEE80211_DEV_REGISTERED; 1780 rtnl_unlock(); 1781 1782 ieee80211_led_init(local); 1783 1784 return 0; 1785 1786fail_wep: 1787 rate_control_deinitialize(local); 1788fail_rate: 1789 unregister_netdevice(local->mdev); 1790 local->mdev = NULL; 1791fail_dev: 1792 rtnl_unlock(); 1793 sta_info_stop(local); 1794fail_sta_info: 1795 debugfs_hw_del(local); 1796 destroy_workqueue(local->hw.workqueue); 1797fail_workqueue: 1798 if (local->mdev) 1799 free_netdev(local->mdev); 1800fail_mdev_alloc: 1801 wiphy_unregister(local->hw.wiphy); 1802 return result; 1803} 1804EXPORT_SYMBOL(ieee80211_register_hw); 1805 1806void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1807{ 1808 struct ieee80211_local *local = hw_to_local(hw); 1809 struct ieee80211_sub_if_data *sdata, *tmp; 1810 1811 tasklet_kill(&local->tx_pending_tasklet); 1812 tasklet_kill(&local->tasklet); 1813 1814 rtnl_lock(); 1815 1816 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); 1817 1818 local->reg_state = IEEE80211_DEV_UNREGISTERED; 1819 1820 /* 1821 * At this point, interface list manipulations are fine 1822 * because the driver cannot be handing us frames any 1823 * more and the tasklet is killed. 1824 */ 1825 1826 /* 1827 * First, we remove all virtual interfaces. 1828 */ 1829 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1830 list_del(&sdata->list); 1831 __ieee80211_if_del(local, sdata); 1832 } 1833 1834 /* then, finally, remove the master interface */ 1835 unregister_netdevice(local->mdev); 1836 1837 rtnl_unlock(); 1838 1839 ieee80211_rx_bss_list_deinit(local); 1840 ieee80211_clear_tx_pending(local); 1841 sta_info_stop(local); 1842 rate_control_deinitialize(local); 1843 debugfs_hw_del(local); 1844 1845 if (skb_queue_len(&local->skb_queue) 1846 || skb_queue_len(&local->skb_queue_unreliable)) 1847 printk(KERN_WARNING "%s: skb_queue not empty\n", 1848 wiphy_name(local->hw.wiphy)); 1849 skb_queue_purge(&local->skb_queue); 1850 skb_queue_purge(&local->skb_queue_unreliable); 1851 1852 destroy_workqueue(local->hw.workqueue); 1853 wiphy_unregister(local->hw.wiphy); 1854 ieee80211_wep_free(local); 1855 ieee80211_led_exit(local); 1856 free_netdev(local->mdev); 1857} 1858EXPORT_SYMBOL(ieee80211_unregister_hw); 1859 1860void ieee80211_free_hw(struct ieee80211_hw *hw) 1861{ 1862 struct ieee80211_local *local = hw_to_local(hw); 1863 1864 wiphy_free(local->hw.wiphy); 1865} 1866EXPORT_SYMBOL(ieee80211_free_hw); 1867 1868static int __init ieee80211_init(void) 1869{ 1870 struct sk_buff *skb; 1871 int ret; 1872 1873 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1874 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1875 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1876 1877 ret = rc80211_pid_init(); 1878 if (ret) 1879 goto out; 1880 1881 ret = ieee80211_wme_register(); 1882 if (ret) { 1883 printk(KERN_DEBUG "ieee80211_init: failed to " 1884 "initialize WME (err=%d)\n", ret); 1885 goto out_cleanup_pid; 1886 } 1887 1888 ieee80211_debugfs_netdev_init(); 1889 1890 return 0; 1891 1892 out_cleanup_pid: 1893 rc80211_pid_exit(); 1894 out: 1895 return ret; 1896} 1897 1898static void __exit ieee80211_exit(void) 1899{ 1900 rc80211_pid_exit(); 1901 1902 /* 1903 * For key todo, it'll be empty by now but the work 1904 * might still be scheduled. 1905 */ 1906 flush_scheduled_work(); 1907 1908 if (mesh_allocated) 1909 ieee80211s_stop(); 1910 1911 ieee80211_wme_unregister(); 1912 ieee80211_debugfs_netdev_exit(); 1913} 1914 1915 1916subsys_initcall(ieee80211_init); 1917module_exit(ieee80211_exit); 1918 1919MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1920MODULE_LICENSE("GPL"); 1921