SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/mac80211/main.c

   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 <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/wireless.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/pm_qos_params.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "driver-ops.h"
  29 #include "rate.h"
  30 #include "mesh.h"
  31 #include "wep.h"
  32 #include "led.h"
  33 #include "cfg.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_promiscs))
  43                 new_flags |= FIF_PROMISC_IN_BSS;
  44
  45         if (atomic_read(&local->iff_allmultis))
  46                 new_flags |= FIF_ALLMULTI;
  47
  48         if (local->monitors || local->scanning)
  49                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  50
  51         if (local->fif_fcsfail)
  52                 new_flags |= FIF_FCSFAIL;
  53
  54         if (local->fif_plcpfail)
  55                 new_flags |= FIF_PLCPFAIL;
  56
  57         if (local->fif_control)
  58                 new_flags |= FIF_CONTROL;
  59
  60         if (local->fif_other_bss)
  61                 new_flags |= FIF_OTHER_BSS;
  62
  63         if (local->fif_pspoll)
  64                 new_flags |= FIF_PSPOLL;
  65
  66         spin_lock_bh(&local->filter_lock);
  67         changed_flags = local->filter_flags ^ new_flags;
  68
  69         mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
  70         spin_unlock_bh(&local->filter_lock);
  71
  72         /* be a bit nasty */
  73         new_flags |= (1<<31);
  74
  75         drv_configure_filter(local, changed_flags, &new_flags, mc);
  76
  77         WARN_ON(new_flags & (1<<31));
  78
  79         local->filter_flags = new_flags & ~(1<<31);
  80 }
  81
  82 static void ieee80211_reconfig_filter(struct work_struct *work)
  83 {
  84         struct ieee80211_local *local =
  85                 container_of(work, struct ieee80211_local, reconfig_filter);
  86
  87         ieee80211_configure_filter(local);
  88 }
  89
  90 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
  91 {
  92         struct ieee80211_channel *chan, *scan_chan;
  93         int ret = 0;
  94         int power;
  95         enum nl80211_channel_type channel_type;
  96
  97         might_sleep();
  98
  99         scan_chan = local->scan_channel;
 100
 101         if (scan_chan) {
 102                 chan = scan_chan;
 103                 channel_type = NL80211_CHAN_NO_HT;
 104         } else {
 105                 chan = local->oper_channel;
 106                 channel_type = local->oper_channel_type;
 107         }
 108
 109         if (chan != local->hw.conf.channel ||
 110             channel_type != local->hw.conf.channel_type) {
 111                 local->hw.conf.channel = chan;
 112                 local->hw.conf.channel_type = channel_type;
 113                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 114         }
 115
 116         if (scan_chan)
 117                 power = chan->max_power;
 118         else
 119                 power = local->power_constr_level ?
 120                         (chan->max_power - local->power_constr_level) :
 121                         chan->max_power;
 122
 123         if (local->user_power_level >= 0)
 124                 power = min(power, local->user_power_level);
 125
 126         if (local->hw.conf.power_level != power) {
 127                 changed |= IEEE80211_CONF_CHANGE_POWER;
 128                 local->hw.conf.power_level = power;
 129         }
 130
 131         if (changed && local->open_count) {
 132                 ret = drv_config(local, changed);
 133                 /*
 134                  * Goal:
 135                  * HW reconfiguration should never fail, the driver has told
 136                  * us what it can support so it should live up to that promise.
 137                  *
 138                  * Current status:
 139                  * rfkill is not integrated with mac80211 and a
 140                  * configuration command can thus fail if hardware rfkill
 141                  * is enabled
 142                  *
 143                  * FIXME: integrate rfkill with mac80211 and then add this
 144                  * WARN_ON() back
 145                  *
 146                  */
 147                 /* WARN_ON(ret); */
 148         }
 149
 150         return ret;
 151 }
 152
 153 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 154                                       u32 changed)
 155 {
 156         struct ieee80211_local *local = sdata->local;
 157         static const u8 zero[ETH_ALEN] = { 0 };
 158
 159         if (!changed)
 160                 return;
 161
 162         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 163                 /*
 164                  * While not associated, claim a BSSID of all-zeroes
 165                  * so that drivers don't do any weird things with the
 166                  * BSSID at that time.
 167                  */
 168                 if (sdata->vif.bss_conf.assoc)
 169                         sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
 170                 else
 171                         sdata->vif.bss_conf.bssid = zero;
 172         } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 173                 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
 174         else if (sdata->vif.type == NL80211_IFTYPE_AP)
 175                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
 176         else if (ieee80211_vif_is_mesh(&sdata->vif)) {
 177                 sdata->vif.bss_conf.bssid = zero;
 178         } else {
 179                 WARN_ON(1);
 180                 return;
 181         }
 182
 183         switch (sdata->vif.type) {
 184         case NL80211_IFTYPE_AP:
 185         case NL80211_IFTYPE_ADHOC:
 186         case NL80211_IFTYPE_MESH_POINT:
 187                 break;
 188         default:
 189                 /* do not warn to simplify caller in scan.c */
 190                 changed &= ~BSS_CHANGED_BEACON_ENABLED;
 191                 if (WARN_ON(changed & BSS_CHANGED_BEACON))
 192                         return;
 193                 break;
 194         }
 195
 196         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 197                 if (local->quiescing || !netif_running(sdata->dev) ||
 198                     test_bit(SCAN_SW_SCANNING, &local->scanning)) {
 199                         sdata->vif.bss_conf.enable_beacon = false;
 200                 } else {
 201                         /*
 202                          * Beacon should be enabled, but AP mode must
 203                          * check whether there is a beacon configured.
 204                          */
 205                         switch (sdata->vif.type) {
 206                         case NL80211_IFTYPE_AP:
 207                                 sdata->vif.bss_conf.enable_beacon =
 208                                         !!rcu_dereference(sdata->u.ap.beacon);
 209                                 break;
 210                         case NL80211_IFTYPE_ADHOC:
 211                                 sdata->vif.bss_conf.enable_beacon =
 212                                         !!rcu_dereference(sdata->u.ibss.presp);
 213                                 break;
 214                         case NL80211_IFTYPE_MESH_POINT:
 215                                 sdata->vif.bss_conf.enable_beacon = true;
 216                                 break;
 217                         default:
 218                                 /* not reached */
 219                                 WARN_ON(1);
 220                                 break;
 221                         }
 222                 }
 223         }
 224
 225         drv_bss_info_changed(local, &sdata->vif,
 226                              &sdata->vif.bss_conf, changed);
 227 }
 228
 229 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 230 {
 231         sdata->vif.bss_conf.use_cts_prot = false;
 232         sdata->vif.bss_conf.use_short_preamble = false;
 233         sdata->vif.bss_conf.use_short_slot = false;
 234         return BSS_CHANGED_ERP_CTS_PROT |
 235                BSS_CHANGED_ERP_PREAMBLE |
 236                BSS_CHANGED_ERP_SLOT;
 237 }
 238
 239 static void ieee80211_tasklet_handler(unsigned long data)
 240 {
 241         struct ieee80211_local *local = (struct ieee80211_local *) data;
 242         struct sk_buff *skb;
 243         struct ieee80211_ra_tid *ra_tid;
 244
 245         while ((skb = skb_dequeue(&local->skb_queue)) ||
 246                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 247                 switch (skb->pkt_type) {
 248                 case IEEE80211_RX_MSG:
 249                         /* Clear skb->pkt_type in order to not confuse kernel
 250                          * netstack. */
 251                         skb->pkt_type = 0;
 252                         ieee80211_rx(local_to_hw(local), skb);
 253                         break;
 254                 case IEEE80211_TX_STATUS_MSG:
 255                         skb->pkt_type = 0;
 256                         ieee80211_tx_status(local_to_hw(local), skb);
 257                         break;
 258                 case IEEE80211_DELBA_MSG:
 259                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 260                         ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra,
 261                                                 ra_tid->tid);
 262                         dev_kfree_skb(skb);
 263                         break;
 264                 case IEEE80211_ADDBA_MSG:
 265                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 266                         ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra,
 267                                                  ra_tid->tid);
 268                         dev_kfree_skb(skb);
 269                         break ;
 270                 default:
 271                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 272                              skb->pkt_type);
 273                         dev_kfree_skb(skb);
 274                         break;
 275                 }
 276         }
 277 }
 278
 279 static void ieee80211_restart_work(struct work_struct *work)
 280 {
 281         struct ieee80211_local *local =
 282                 container_of(work, struct ieee80211_local, restart_work);
 283
 284         rtnl_lock();
 285         ieee80211_reconfig(local);
 286         rtnl_unlock();
 287 }
 288
 289 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 290 {
 291         struct ieee80211_local *local = hw_to_local(hw);
 292
 293         /* use this reason, __ieee80211_resume will unblock it */
 294         ieee80211_stop_queues_by_reason(hw,
 295                 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 296
 297         schedule_work(&local->restart_work);
 298 }
 299 EXPORT_SYMBOL(ieee80211_restart_hw);
 300
 301 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 302                                         const struct ieee80211_ops *ops)
 303 {
 304         struct ieee80211_local *local;
 305         int priv_size, i;
 306         struct wiphy *wiphy;
 307
 308         /* Ensure 32-byte alignment of our private data and hw private data.
 309          * We use the wiphy priv data for both our ieee80211_local and for
 310          * the driver's private data
 311          *
 312          * In memory it'll be like this:
 313          *
 314          * +-------------------------+
 315          * | struct wiphy           |
 316          * +-------------------------+
 317          * | struct ieee80211_local  |
 318          * +-------------------------+
 319          * | driver's private data   |
 320          * +-------------------------+
 321          *
 322          */
 323         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 324
 325         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 326
 327         if (!wiphy)
 328                 return NULL;
 329
 330         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 331                         WIPHY_FLAG_4ADDR_AP |
 332                         WIPHY_FLAG_4ADDR_STATION;
 333         wiphy->privid = mac80211_wiphy_privid;
 334
 335         /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
 336         wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
 337                                sizeof(struct cfg80211_bss);
 338
 339         local = wiphy_priv(wiphy);
 340
 341         local->hw.wiphy = wiphy;
 342
 343         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 344
 345         BUG_ON(!ops->tx);
 346         BUG_ON(!ops->start);
 347         BUG_ON(!ops->stop);
 348         BUG_ON(!ops->config);
 349         BUG_ON(!ops->add_interface);
 350         BUG_ON(!ops->remove_interface);
 351         BUG_ON(!ops->configure_filter);
 352         local->ops = ops;
 353
 354         /* set up some defaults */
 355         local->hw.queues = 1;
 356         local->hw.max_rates = 1;
 357         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 358         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 359         local->user_power_level = -1;
 360
 361         INIT_LIST_HEAD(&local->interfaces);
 362         mutex_init(&local->iflist_mtx);
 363         mutex_init(&local->scan_mtx);
 364
 365         spin_lock_init(&local->key_lock);
 366         spin_lock_init(&local->filter_lock);
 367         spin_lock_init(&local->queue_stop_reason_lock);
 368
 369         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 370
 371         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 372
 373         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 374
 375         INIT_WORK(&local->dynamic_ps_enable_work,
 376                   ieee80211_dynamic_ps_enable_work);
 377         INIT_WORK(&local->dynamic_ps_disable_work,
 378                   ieee80211_dynamic_ps_disable_work);
 379         setup_timer(&local->dynamic_ps_timer,
 380                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 381
 382         sta_info_init(local);
 383
 384         for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
 385                 skb_queue_head_init(&local->pending[i]);
 386         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 387                      (unsigned long)local);
 388
 389         tasklet_init(&local->tasklet,
 390                      ieee80211_tasklet_handler,
 391                      (unsigned long) local);
 392
 393         skb_queue_head_init(&local->skb_queue);
 394         skb_queue_head_init(&local->skb_queue_unreliable);
 395
 396         spin_lock_init(&local->ampdu_lock);
 397
 398         return local_to_hw(local);
 399 }
 400 EXPORT_SYMBOL(ieee80211_alloc_hw);
 401
 402 int ieee80211_register_hw(struct ieee80211_hw *hw)
 403 {
 404         struct ieee80211_local *local = hw_to_local(hw);
 405         int result;
 406         enum ieee80211_band band;
 407         int channels, i, j, max_bitrates;
 408         bool supp_ht;
 409         static const u32 cipher_suites[] = {
 410                 WLAN_CIPHER_SUITE_WEP40,
 411                 WLAN_CIPHER_SUITE_WEP104,
 412                 WLAN_CIPHER_SUITE_TKIP,
 413                 WLAN_CIPHER_SUITE_CCMP,
 414
 415                 /* keep last -- depends on hw flags! */
 416                 WLAN_CIPHER_SUITE_AES_CMAC
 417         };
 418
 419         /*
 420          * generic code guarantees at least one band,
 421          * set this very early because much code assumes
 422          * that hw.conf.channel is assigned
 423          */
 424         channels = 0;
 425         max_bitrates = 0;
 426         supp_ht = false;
 427         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 428                 struct ieee80211_supported_band *sband;
 429
 430                 sband = local->hw.wiphy->bands[band];
 431                 if (!sband)
 432                         continue;
 433                 if (!local->oper_channel) {
 434                         /* init channel we're on */
 435                         local->hw.conf.channel =
 436                         local->oper_channel = &sband->channels[0];
 437                         local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
 438                 }
 439                 channels += sband->n_channels;
 440
 441                 if (max_bitrates < sband->n_bitrates)
 442                         max_bitrates = sband->n_bitrates;
 443                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 444         }
 445
 446         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 447                                       sizeof(void *) * channels, GFP_KERNEL);
 448         if (!local->int_scan_req)
 449                 return -ENOMEM;
 450
 451         /* if low-level driver supports AP, we also support VLAN */
 452         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
 453                 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 454
 455         /* mac80211 always supports monitor */
 456         local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 457
 458         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 459                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 460         else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 461                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 462
 463         /*
 464          * Calculate scan IE length -- we need this to alloc
 465          * memory and to subtract from the driver limit. It
 466          * includes the (extended) supported rates and HT
 467          * information -- SSID is the driver's responsibility.
 468          */
 469         local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
 470         if (supp_ht)
 471                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 472
 473         if (!local->ops->hw_scan) {
 474                 /* For hw_scan, driver needs to set these up. */
 475                 local->hw.wiphy->max_scan_ssids = 4;
 476                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 477         }
 478
 479         /*
 480          * If the driver supports any scan IEs, then assume the
 481          * limit includes the IEs mac80211 will add, otherwise
 482          * leave it at zero and let the driver sort it out; we
 483          * still pass our IEs to the driver but userspace will
 484          * not be allowed to in that case.
 485          */
 486         if (local->hw.wiphy->max_scan_ie_len)
 487                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 488
 489         local->hw.wiphy->cipher_suites = cipher_suites;
 490         local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 491         if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
 492                 local->hw.wiphy->n_cipher_suites--;
 493
 494         result = wiphy_register(local->hw.wiphy);
 495         if (result < 0)
 496                 goto fail_wiphy_register;
 497
 498         /*
 499          * We use the number of queues for feature tests (QoS, HT) internally
 500          * so restrict them appropriately.
 501          */
 502         if (hw->queues > IEEE80211_MAX_QUEUES)
 503                 hw->queues = IEEE80211_MAX_QUEUES;
 504
 505         local->workqueue =
 506                 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
 507         if (!local->workqueue) {
 508                 result = -ENOMEM;
 509                 goto fail_workqueue;
 510         }
 511
 512         /*
 513          * The hardware needs headroom for sending the frame,
 514          * and we need some headroom for passing the frame to monitor
 515          * interfaces, but never both at the same time.
 516          */
 517         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 518                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
 519
 520         debugfs_hw_add(local);
 521
 522         if (local->hw.max_listen_interval == 0)
 523                 local->hw.max_listen_interval = 1;
 524
 525         local->hw.conf.listen_interval = local->hw.max_listen_interval;
 526
 527         result = sta_info_start(local);
 528         if (result < 0)
 529                 goto fail_sta_info;
 530
 531         result = ieee80211_wep_init(local);
 532         if (result < 0) {
 533                 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
 534                        wiphy_name(local->hw.wiphy), result);
 535                 goto fail_wep;
 536         }
 537
 538         rtnl_lock();
 539
 540         result = ieee80211_init_rate_ctrl_alg(local,
 541                                               hw->rate_control_algorithm);
 542         if (result < 0) {
 543                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
 544                        "algorithm\n", wiphy_name(local->hw.wiphy));
 545                 goto fail_rate;
 546         }
 547
 548         /* add one default STA interface if supported */
 549         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
 550                 result = ieee80211_if_add(local, "wlan%d", NULL,
 551                                           NL80211_IFTYPE_STATION, NULL);
 552                 if (result)
 553                         printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
 554                                wiphy_name(local->hw.wiphy));
 555         }
 556
 557         rtnl_unlock();
 558
 559         ieee80211_led_init(local);
 560
 561         /* alloc internal scan request */
 562         i = 0;
 563         local->int_scan_req->ssids = &local->scan_ssid;
 564         local->int_scan_req->n_ssids = 1;
 565         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 566                 if (!hw->wiphy->bands[band])
 567                         continue;
 568                 for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
 569                         local->int_scan_req->channels[i] =
 570                                 &hw->wiphy->bands[band]->channels[j];
 571                         i++;
 572                 }
 573         }
 574         local->int_scan_req->n_channels = i;
 575
 576         local->network_latency_notifier.notifier_call =
 577                 ieee80211_max_network_latency;
 578         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
 579                                      &local->network_latency_notifier);
 580
 581         if (result) {
 582                 rtnl_lock();
 583                 goto fail_pm_qos;
 584         }
 585
 586         return 0;
 587
 588  fail_pm_qos:
 589         ieee80211_led_exit(local);
 590         ieee80211_remove_interfaces(local);
 591  fail_rate:
 592         rtnl_unlock();
 593         ieee80211_wep_free(local);
 594  fail_wep:
 595         sta_info_stop(local);
 596  fail_sta_info:
 597         destroy_workqueue(local->workqueue);
 598  fail_workqueue:
 599         wiphy_unregister(local->hw.wiphy);
 600  fail_wiphy_register:
 601         kfree(local->int_scan_req);
 602         return result;
 603 }
 604 EXPORT_SYMBOL(ieee80211_register_hw);
 605
 606 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
 607 {
 608         struct ieee80211_local *local = hw_to_local(hw);
 609
 610         tasklet_kill(&local->tx_pending_tasklet);
 611         tasklet_kill(&local->tasklet);
 612
 613         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
 614                                &local->network_latency_notifier);
 615
 616         rtnl_lock();
 617
 618         /*
 619          * At this point, interface list manipulations are fine
 620          * because the driver cannot be handing us frames any
 621          * more and the tasklet is killed.
 622          */
 623         ieee80211_remove_interfaces(local);
 624
 625         rtnl_unlock();
 626
 627         cancel_work_sync(&local->reconfig_filter);
 628
 629         ieee80211_clear_tx_pending(local);
 630         sta_info_stop(local);
 631         rate_control_deinitialize(local);
 632
 633         if (skb_queue_len(&local->skb_queue) ||
 634             skb_queue_len(&local->skb_queue_unreliable))
 635                 printk(KERN_WARNING "%s: skb_queue not empty\n",
 636                        wiphy_name(local->hw.wiphy));
 637         skb_queue_purge(&local->skb_queue);
 638         skb_queue_purge(&local->skb_queue_unreliable);
 639
 640         destroy_workqueue(local->workqueue);
 641         wiphy_unregister(local->hw.wiphy);
 642         ieee80211_wep_free(local);
 643         ieee80211_led_exit(local);
 644         kfree(local->int_scan_req);
 645 }
 646 EXPORT_SYMBOL(ieee80211_unregister_hw);
 647
 648 void ieee80211_free_hw(struct ieee80211_hw *hw)
 649 {
 650         struct ieee80211_local *local = hw_to_local(hw);
 651
 652         mutex_destroy(&local->iflist_mtx);
 653         mutex_destroy(&local->scan_mtx);
 654
 655         wiphy_free(local->hw.wiphy);
 656 }
 657 EXPORT_SYMBOL(ieee80211_free_hw);
 658
 659 static int __init ieee80211_init(void)
 660 {
 661         struct sk_buff *skb;
 662         int ret;
 663
 664         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
 665         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
 666                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
 667
 668         ret = rc80211_minstrel_init();
 669         if (ret)
 670                 return ret;
 671
 672         ret = rc80211_pid_init();
 673         if (ret)
 674                 goto err_pid;
 675
 676         ret = ieee80211_iface_init();
 677         if (ret)
 678                 goto err_netdev;
 679
 680         return 0;
 681  err_netdev:
 682         rc80211_pid_exit();
 683  err_pid:
 684         rc80211_minstrel_exit();
 685
 686         return ret;
 687 }
 688
 689 static void __exit ieee80211_exit(void)
 690 {
 691         rc80211_pid_exit();
 692         rc80211_minstrel_exit();
 693
 694         /*
 695          * For key todo, it'll be empty by now but the work
 696          * might still be scheduled.
 697          */
 698         flush_scheduled_work();
 699
 700         if (mesh_allocated)
 701                 ieee80211s_stop();
 702
 703         ieee80211_iface_exit();
 704 }
 705
 706
 707 subsys_initcall(ieee80211_init);
 708 module_exit(ieee80211_exit);
 709
 710 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
 711 MODULE_LICENSE("GPL");