Merge branch 'for-2.6.25' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerp...
[linux-2.6] / net / mac80211 / ieee80211.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 <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 "ieee80211_rate.h"
29 #include "wep.h"
30 #include "wme.h"
31 #include "aes_ccm.h"
32 #include "ieee80211_led.h"
33 #include "cfg.h"
34 #include "debugfs.h"
35 #include "debugfs_netdev.h"
36
37 /*
38  * For seeing transmitted packets on monitor interfaces
39  * we have a radiotap header too.
40  */
41 struct ieee80211_tx_status_rtap_hdr {
42         struct ieee80211_radiotap_header hdr;
43         __le16 tx_flags;
44         u8 data_retries;
45 } __attribute__ ((packed));
46
47 /* common interface routines */
48
49 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
50 {
51         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
52         return ETH_ALEN;
53 }
54
55 /* must be called under mdev tx lock */
56 static void ieee80211_configure_filter(struct ieee80211_local *local)
57 {
58         unsigned int changed_flags;
59         unsigned int new_flags = 0;
60
61         if (atomic_read(&local->iff_promiscs))
62                 new_flags |= FIF_PROMISC_IN_BSS;
63
64         if (atomic_read(&local->iff_allmultis))
65                 new_flags |= FIF_ALLMULTI;
66
67         if (local->monitors)
68                 new_flags |= FIF_CONTROL |
69                              FIF_OTHER_BSS |
70                              FIF_BCN_PRBRESP_PROMISC;
71
72         changed_flags = local->filter_flags ^ new_flags;
73
74         /* be a bit nasty */
75         new_flags |= (1<<31);
76
77         local->ops->configure_filter(local_to_hw(local),
78                                      changed_flags, &new_flags,
79                                      local->mdev->mc_count,
80                                      local->mdev->mc_list);
81
82         WARN_ON(new_flags & (1<<31));
83
84         local->filter_flags = new_flags & ~(1<<31);
85 }
86
87 /* master interface */
88
89 static int ieee80211_master_open(struct net_device *dev)
90 {
91         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
92         struct ieee80211_sub_if_data *sdata;
93         int res = -EOPNOTSUPP;
94
95         /* we hold the RTNL here so can safely walk the list */
96         list_for_each_entry(sdata, &local->interfaces, list) {
97                 if (sdata->dev != dev && netif_running(sdata->dev)) {
98                         res = 0;
99                         break;
100                 }
101         }
102         return res;
103 }
104
105 static int ieee80211_master_stop(struct net_device *dev)
106 {
107         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
108         struct ieee80211_sub_if_data *sdata;
109
110         /* we hold the RTNL here so can safely walk the list */
111         list_for_each_entry(sdata, &local->interfaces, list)
112                 if (sdata->dev != dev && netif_running(sdata->dev))
113                         dev_close(sdata->dev);
114
115         return 0;
116 }
117
118 static void ieee80211_master_set_multicast_list(struct net_device *dev)
119 {
120         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
121
122         ieee80211_configure_filter(local);
123 }
124
125 /* regular interfaces */
126
127 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
128 {
129         /* FIX: what would be proper limits for MTU?
130          * This interface uses 802.3 frames. */
131         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
132                 printk(KERN_WARNING "%s: invalid MTU %d\n",
133                        dev->name, new_mtu);
134                 return -EINVAL;
135         }
136
137 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
138         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
139 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
140         dev->mtu = new_mtu;
141         return 0;
142 }
143
144 static inline int identical_mac_addr_allowed(int type1, int type2)
145 {
146         return (type1 == IEEE80211_IF_TYPE_MNTR ||
147                 type2 == IEEE80211_IF_TYPE_MNTR ||
148                 (type1 == IEEE80211_IF_TYPE_AP &&
149                  type2 == IEEE80211_IF_TYPE_WDS) ||
150                 (type1 == IEEE80211_IF_TYPE_WDS &&
151                  (type2 == IEEE80211_IF_TYPE_WDS ||
152                   type2 == IEEE80211_IF_TYPE_AP)) ||
153                 (type1 == IEEE80211_IF_TYPE_AP &&
154                  type2 == IEEE80211_IF_TYPE_VLAN) ||
155                 (type1 == IEEE80211_IF_TYPE_VLAN &&
156                  (type2 == IEEE80211_IF_TYPE_AP ||
157                   type2 == IEEE80211_IF_TYPE_VLAN)));
158 }
159
160 static int ieee80211_open(struct net_device *dev)
161 {
162         struct ieee80211_sub_if_data *sdata, *nsdata;
163         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
164         struct ieee80211_if_init_conf conf;
165         int res;
166
167         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
168
169         /* we hold the RTNL here so can safely walk the list */
170         list_for_each_entry(nsdata, &local->interfaces, list) {
171                 struct net_device *ndev = nsdata->dev;
172
173                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
174                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
175                         /*
176                          * check whether it may have the same address
177                          */
178                         if (!identical_mac_addr_allowed(sdata->type,
179                                                         nsdata->type))
180                                 return -ENOTUNIQ;
181
182                         /*
183                          * can only add VLANs to enabled APs
184                          */
185                         if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
186                             nsdata->type == IEEE80211_IF_TYPE_AP &&
187                             netif_running(nsdata->dev))
188                                 sdata->u.vlan.ap = nsdata;
189                 }
190         }
191
192         switch (sdata->type) {
193         case IEEE80211_IF_TYPE_WDS:
194                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
195                         return -ENOLINK;
196                 break;
197         case IEEE80211_IF_TYPE_VLAN:
198                 if (!sdata->u.vlan.ap)
199                         return -ENOLINK;
200                 break;
201         case IEEE80211_IF_TYPE_AP:
202         case IEEE80211_IF_TYPE_STA:
203         case IEEE80211_IF_TYPE_MNTR:
204         case IEEE80211_IF_TYPE_IBSS:
205                 /* no special treatment */
206                 break;
207         case IEEE80211_IF_TYPE_INVALID:
208                 /* cannot happen */
209                 WARN_ON(1);
210                 break;
211         }
212
213         if (local->open_count == 0) {
214                 res = 0;
215                 if (local->ops->start)
216                         res = local->ops->start(local_to_hw(local));
217                 if (res)
218                         return res;
219                 ieee80211_hw_config(local);
220         }
221
222         switch (sdata->type) {
223         case IEEE80211_IF_TYPE_VLAN:
224                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
225                 /* no need to tell driver */
226                 break;
227         case IEEE80211_IF_TYPE_MNTR:
228                 /* must be before the call to ieee80211_configure_filter */
229                 local->monitors++;
230                 if (local->monitors == 1) {
231                         netif_tx_lock_bh(local->mdev);
232                         ieee80211_configure_filter(local);
233                         netif_tx_unlock_bh(local->mdev);
234
235                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
236                 }
237                 break;
238         case IEEE80211_IF_TYPE_STA:
239         case IEEE80211_IF_TYPE_IBSS:
240                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
241                 /* fall through */
242         default:
243                 conf.if_id = dev->ifindex;
244                 conf.type = sdata->type;
245                 conf.mac_addr = dev->dev_addr;
246                 res = local->ops->add_interface(local_to_hw(local), &conf);
247                 if (res && !local->open_count && local->ops->stop)
248                         local->ops->stop(local_to_hw(local));
249                 if (res)
250                         return res;
251
252                 ieee80211_if_config(dev);
253                 ieee80211_reset_erp_info(dev);
254                 ieee80211_enable_keys(sdata);
255
256                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
257                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
258                         netif_carrier_off(dev);
259                 else
260                         netif_carrier_on(dev);
261         }
262
263         if (local->open_count == 0) {
264                 res = dev_open(local->mdev);
265                 WARN_ON(res);
266                 tasklet_enable(&local->tx_pending_tasklet);
267                 tasklet_enable(&local->tasklet);
268         }
269
270         /*
271          * set_multicast_list will be invoked by the networking core
272          * which will check whether any increments here were done in
273          * error and sync them down to the hardware as filter flags.
274          */
275         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
276                 atomic_inc(&local->iff_allmultis);
277
278         if (sdata->flags & IEEE80211_SDATA_PROMISC)
279                 atomic_inc(&local->iff_promiscs);
280
281         local->open_count++;
282
283         netif_start_queue(dev);
284
285         return 0;
286 }
287
288 static int ieee80211_stop(struct net_device *dev)
289 {
290         struct ieee80211_sub_if_data *sdata;
291         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
292         struct ieee80211_if_init_conf conf;
293
294         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
295
296         netif_stop_queue(dev);
297
298         /*
299          * Don't count this interface for promisc/allmulti while it
300          * is down. dev_mc_unsync() will invoke set_multicast_list
301          * on the master interface which will sync these down to the
302          * hardware as filter flags.
303          */
304         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
305                 atomic_dec(&local->iff_allmultis);
306
307         if (sdata->flags & IEEE80211_SDATA_PROMISC)
308                 atomic_dec(&local->iff_promiscs);
309
310         dev_mc_unsync(local->mdev, dev);
311
312         /* down all dependent devices, that is VLANs */
313         if (sdata->type == IEEE80211_IF_TYPE_AP) {
314                 struct ieee80211_sub_if_data *vlan, *tmp;
315
316                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
317                                          u.vlan.list)
318                         dev_close(vlan->dev);
319                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
320         }
321
322         local->open_count--;
323
324         switch (sdata->type) {
325         case IEEE80211_IF_TYPE_VLAN:
326                 list_del(&sdata->u.vlan.list);
327                 sdata->u.vlan.ap = NULL;
328                 /* no need to tell driver */
329                 break;
330         case IEEE80211_IF_TYPE_MNTR:
331                 local->monitors--;
332                 if (local->monitors == 0) {
333                         netif_tx_lock_bh(local->mdev);
334                         ieee80211_configure_filter(local);
335                         netif_tx_unlock_bh(local->mdev);
336
337                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
338                 }
339                 break;
340         case IEEE80211_IF_TYPE_STA:
341         case IEEE80211_IF_TYPE_IBSS:
342                 sdata->u.sta.state = IEEE80211_DISABLED;
343                 del_timer_sync(&sdata->u.sta.timer);
344                 /*
345                  * When we get here, the interface is marked down.
346                  * Call synchronize_rcu() to wait for the RX path
347                  * should it be using the interface and enqueuing
348                  * frames at this very time on another CPU.
349                  */
350                 synchronize_rcu();
351                 skb_queue_purge(&sdata->u.sta.skb_queue);
352
353                 if (!local->ops->hw_scan &&
354                     local->scan_dev == sdata->dev) {
355                         local->sta_scanning = 0;
356                         cancel_delayed_work(&local->scan_work);
357                 }
358                 flush_workqueue(local->hw.workqueue);
359
360                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
361                 kfree(sdata->u.sta.extra_ie);
362                 sdata->u.sta.extra_ie = NULL;
363                 sdata->u.sta.extra_ie_len = 0;
364                 /* fall through */
365         default:
366                 conf.if_id = dev->ifindex;
367                 conf.type = sdata->type;
368                 conf.mac_addr = dev->dev_addr;
369                 /* disable all keys for as long as this netdev is down */
370                 ieee80211_disable_keys(sdata);
371                 local->ops->remove_interface(local_to_hw(local), &conf);
372         }
373
374         if (local->open_count == 0) {
375                 if (netif_running(local->mdev))
376                         dev_close(local->mdev);
377
378                 if (local->ops->stop)
379                         local->ops->stop(local_to_hw(local));
380
381                 tasklet_disable(&local->tx_pending_tasklet);
382                 tasklet_disable(&local->tasklet);
383         }
384
385         return 0;
386 }
387
388 static void ieee80211_set_multicast_list(struct net_device *dev)
389 {
390         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
391         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
392         int allmulti, promisc, sdata_allmulti, sdata_promisc;
393
394         allmulti = !!(dev->flags & IFF_ALLMULTI);
395         promisc = !!(dev->flags & IFF_PROMISC);
396         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
397         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
398
399         if (allmulti != sdata_allmulti) {
400                 if (dev->flags & IFF_ALLMULTI)
401                         atomic_inc(&local->iff_allmultis);
402                 else
403                         atomic_dec(&local->iff_allmultis);
404                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
405         }
406
407         if (promisc != sdata_promisc) {
408                 if (dev->flags & IFF_PROMISC)
409                         atomic_inc(&local->iff_promiscs);
410                 else
411                         atomic_dec(&local->iff_promiscs);
412                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
413         }
414
415         dev_mc_sync(local->mdev, dev);
416 }
417
418 static const struct header_ops ieee80211_header_ops = {
419         .create         = eth_header,
420         .parse          = header_parse_80211,
421         .rebuild        = eth_rebuild_header,
422         .cache          = eth_header_cache,
423         .cache_update   = eth_header_cache_update,
424 };
425
426 /* Must not be called for mdev */
427 void ieee80211_if_setup(struct net_device *dev)
428 {
429         ether_setup(dev);
430         dev->hard_start_xmit = ieee80211_subif_start_xmit;
431         dev->wireless_handlers = &ieee80211_iw_handler_def;
432         dev->set_multicast_list = ieee80211_set_multicast_list;
433         dev->change_mtu = ieee80211_change_mtu;
434         dev->open = ieee80211_open;
435         dev->stop = ieee80211_stop;
436         dev->destructor = ieee80211_if_free;
437 }
438
439 /* WDS specialties */
440
441 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
442 {
443         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
444         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
445         struct sta_info *sta;
446         DECLARE_MAC_BUF(mac);
447
448         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
449                 return 0;
450
451         /* Create STA entry for the new peer */
452         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
453         if (!sta)
454                 return -ENOMEM;
455         sta_info_put(sta);
456
457         /* Remove STA entry for the old peer */
458         sta = sta_info_get(local, sdata->u.wds.remote_addr);
459         if (sta) {
460                 sta_info_free(sta);
461                 sta_info_put(sta);
462         } else {
463                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
464                        "peer %s\n",
465                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
466         }
467
468         /* Update WDS link data */
469         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
470
471         return 0;
472 }
473
474 /* everything else */
475
476 static int __ieee80211_if_config(struct net_device *dev,
477                                  struct sk_buff *beacon,
478                                  struct ieee80211_tx_control *control)
479 {
480         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
481         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
482         struct ieee80211_if_conf conf;
483
484         if (!local->ops->config_interface || !netif_running(dev))
485                 return 0;
486
487         memset(&conf, 0, sizeof(conf));
488         conf.type = sdata->type;
489         if (sdata->type == IEEE80211_IF_TYPE_STA ||
490             sdata->type == IEEE80211_IF_TYPE_IBSS) {
491                 conf.bssid = sdata->u.sta.bssid;
492                 conf.ssid = sdata->u.sta.ssid;
493                 conf.ssid_len = sdata->u.sta.ssid_len;
494         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
495                 conf.ssid = sdata->u.ap.ssid;
496                 conf.ssid_len = sdata->u.ap.ssid_len;
497                 conf.beacon = beacon;
498                 conf.beacon_control = control;
499         }
500         return local->ops->config_interface(local_to_hw(local),
501                                            dev->ifindex, &conf);
502 }
503
504 int ieee80211_if_config(struct net_device *dev)
505 {
506         return __ieee80211_if_config(dev, NULL, NULL);
507 }
508
509 int ieee80211_if_config_beacon(struct net_device *dev)
510 {
511         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
512         struct ieee80211_tx_control control;
513         struct sk_buff *skb;
514
515         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
516                 return 0;
517         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
518         if (!skb)
519                 return -ENOMEM;
520         return __ieee80211_if_config(dev, skb, &control);
521 }
522
523 int ieee80211_hw_config(struct ieee80211_local *local)
524 {
525         struct ieee80211_hw_mode *mode;
526         struct ieee80211_channel *chan;
527         int ret = 0;
528
529         if (local->sta_scanning) {
530                 chan = local->scan_channel;
531                 mode = local->scan_hw_mode;
532         } else {
533                 chan = local->oper_channel;
534                 mode = local->oper_hw_mode;
535         }
536
537         local->hw.conf.channel = chan->chan;
538         local->hw.conf.channel_val = chan->val;
539         if (!local->hw.conf.power_level) {
540                 local->hw.conf.power_level = chan->power_level;
541         } else {
542                 local->hw.conf.power_level = min(chan->power_level,
543                                                  local->hw.conf.power_level);
544         }
545         local->hw.conf.freq = chan->freq;
546         local->hw.conf.phymode = mode->mode;
547         local->hw.conf.antenna_max = chan->antenna_max;
548         local->hw.conf.chan = chan;
549         local->hw.conf.mode = mode;
550
551 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
552         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
553                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
554                local->hw.conf.phymode);
555 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
556
557         if (local->open_count)
558                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
559
560         return ret;
561 }
562
563 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
564 {
565         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
566         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
567         if (local->ops->erp_ie_changed)
568                 local->ops->erp_ie_changed(local_to_hw(local), changes,
569                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
570                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
571 }
572
573 void ieee80211_reset_erp_info(struct net_device *dev)
574 {
575         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
576
577         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
578                         IEEE80211_SDATA_SHORT_PREAMBLE);
579         ieee80211_erp_info_change_notify(dev,
580                                          IEEE80211_ERP_CHANGE_PROTECTION |
581                                          IEEE80211_ERP_CHANGE_PREAMBLE);
582 }
583
584 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
585                                  struct sk_buff *skb,
586                                  struct ieee80211_tx_status *status)
587 {
588         struct ieee80211_local *local = hw_to_local(hw);
589         struct ieee80211_tx_status *saved;
590         int tmp;
591
592         skb->dev = local->mdev;
593         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
594         if (unlikely(!saved)) {
595                 if (net_ratelimit())
596                         printk(KERN_WARNING "%s: Not enough memory, "
597                                "dropping tx status", skb->dev->name);
598                 /* should be dev_kfree_skb_irq, but due to this function being
599                  * named _irqsafe instead of just _irq we can't be sure that
600                  * people won't call it from non-irq contexts */
601                 dev_kfree_skb_any(skb);
602                 return;
603         }
604         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
605         /* copy pointer to saved status into skb->cb for use by tasklet */
606         memcpy(skb->cb, &saved, sizeof(saved));
607
608         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
609         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
610                        &local->skb_queue : &local->skb_queue_unreliable, skb);
611         tmp = skb_queue_len(&local->skb_queue) +
612                 skb_queue_len(&local->skb_queue_unreliable);
613         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
614                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
615                 memcpy(&saved, skb->cb, sizeof(saved));
616                 kfree(saved);
617                 dev_kfree_skb_irq(skb);
618                 tmp--;
619                 I802_DEBUG_INC(local->tx_status_drop);
620         }
621         tasklet_schedule(&local->tasklet);
622 }
623 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
624
625 static void ieee80211_tasklet_handler(unsigned long data)
626 {
627         struct ieee80211_local *local = (struct ieee80211_local *) data;
628         struct sk_buff *skb;
629         struct ieee80211_rx_status rx_status;
630         struct ieee80211_tx_status *tx_status;
631
632         while ((skb = skb_dequeue(&local->skb_queue)) ||
633                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
634                 switch (skb->pkt_type) {
635                 case IEEE80211_RX_MSG:
636                         /* status is in skb->cb */
637                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
638                         /* Clear skb->type in order to not confuse kernel
639                          * netstack. */
640                         skb->pkt_type = 0;
641                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
642                         break;
643                 case IEEE80211_TX_STATUS_MSG:
644                         /* get pointer to saved status out of skb->cb */
645                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
646                         skb->pkt_type = 0;
647                         ieee80211_tx_status(local_to_hw(local),
648                                             skb, tx_status);
649                         kfree(tx_status);
650                         break;
651                 default: /* should never get here! */
652                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
653                                wiphy_name(local->hw.wiphy), skb->pkt_type);
654                         dev_kfree_skb(skb);
655                         break;
656                 }
657         }
658 }
659
660 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
661  * make a prepared TX frame (one that has been given to hw) to look like brand
662  * new IEEE 802.11 frame that is ready to go through TX processing again.
663  * Also, tx_packet_data in cb is restored from tx_control. */
664 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
665                                       struct ieee80211_key *key,
666                                       struct sk_buff *skb,
667                                       struct ieee80211_tx_control *control)
668 {
669         int hdrlen, iv_len, mic_len;
670         struct ieee80211_tx_packet_data *pkt_data;
671
672         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
673         pkt_data->ifindex = control->ifindex;
674         pkt_data->flags = 0;
675         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
676                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
677         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
678                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
679         if (control->flags & IEEE80211_TXCTL_REQUEUE)
680                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
681         pkt_data->queue = control->queue;
682
683         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
684
685         if (!key)
686                 goto no_key;
687
688         switch (key->conf.alg) {
689         case ALG_WEP:
690                 iv_len = WEP_IV_LEN;
691                 mic_len = WEP_ICV_LEN;
692                 break;
693         case ALG_TKIP:
694                 iv_len = TKIP_IV_LEN;
695                 mic_len = TKIP_ICV_LEN;
696                 break;
697         case ALG_CCMP:
698                 iv_len = CCMP_HDR_LEN;
699                 mic_len = CCMP_MIC_LEN;
700                 break;
701         default:
702                 goto no_key;
703         }
704
705         if (skb->len >= mic_len &&
706             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
707                 skb_trim(skb, skb->len - mic_len);
708         if (skb->len >= iv_len && skb->len > hdrlen) {
709                 memmove(skb->data + iv_len, skb->data, hdrlen);
710                 skb_pull(skb, iv_len);
711         }
712
713 no_key:
714         {
715                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
716                 u16 fc = le16_to_cpu(hdr->frame_control);
717                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
718                         fc &= ~IEEE80211_STYPE_QOS_DATA;
719                         hdr->frame_control = cpu_to_le16(fc);
720                         memmove(skb->data + 2, skb->data, hdrlen - 2);
721                         skb_pull(skb, 2);
722                 }
723         }
724 }
725
726 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
727                          struct ieee80211_tx_status *status)
728 {
729         struct sk_buff *skb2;
730         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
731         struct ieee80211_local *local = hw_to_local(hw);
732         u16 frag, type;
733         struct ieee80211_tx_status_rtap_hdr *rthdr;
734         struct ieee80211_sub_if_data *sdata;
735         int monitors;
736
737         if (!status) {
738                 printk(KERN_ERR
739                        "%s: ieee80211_tx_status called with NULL status\n",
740                        wiphy_name(local->hw.wiphy));
741                 dev_kfree_skb(skb);
742                 return;
743         }
744
745         if (status->excessive_retries) {
746                 struct sta_info *sta;
747                 sta = sta_info_get(local, hdr->addr1);
748                 if (sta) {
749                         if (sta->flags & WLAN_STA_PS) {
750                                 /* The STA is in power save mode, so assume
751                                  * that this TX packet failed because of that.
752                                  */
753                                 status->excessive_retries = 0;
754                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
755                         }
756                         sta_info_put(sta);
757                 }
758         }
759
760         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
761                 struct sta_info *sta;
762                 sta = sta_info_get(local, hdr->addr1);
763                 if (sta) {
764                         sta->tx_filtered_count++;
765
766                         /* Clear the TX filter mask for this STA when sending
767                          * the next packet. If the STA went to power save mode,
768                          * this will happen when it is waking up for the next
769                          * time. */
770                         sta->clear_dst_mask = 1;
771
772                         /* TODO: Is the WLAN_STA_PS flag always set here or is
773                          * the race between RX and TX status causing some
774                          * packets to be filtered out before 80211.o gets an
775                          * update for PS status? This seems to be the case, so
776                          * no changes are likely to be needed. */
777                         if (sta->flags & WLAN_STA_PS &&
778                             skb_queue_len(&sta->tx_filtered) <
779                             STA_MAX_TX_BUFFER) {
780                                 ieee80211_remove_tx_extra(local, sta->key,
781                                                           skb,
782                                                           &status->control);
783                                 skb_queue_tail(&sta->tx_filtered, skb);
784                         } else if (!(sta->flags & WLAN_STA_PS) &&
785                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
786                                 /* Software retry the packet once */
787                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
788                                 ieee80211_remove_tx_extra(local, sta->key,
789                                                           skb,
790                                                           &status->control);
791                                 dev_queue_xmit(skb);
792                         } else {
793                                 if (net_ratelimit()) {
794                                         printk(KERN_DEBUG "%s: dropped TX "
795                                                "filtered frame queue_len=%d "
796                                                "PS=%d @%lu\n",
797                                                wiphy_name(local->hw.wiphy),
798                                                skb_queue_len(
799                                                        &sta->tx_filtered),
800                                                !!(sta->flags & WLAN_STA_PS),
801                                                jiffies);
802                                 }
803                                 dev_kfree_skb(skb);
804                         }
805                         sta_info_put(sta);
806                         return;
807                 }
808         } else {
809                 /* FIXME: STUPID to call this with both local and local->mdev */
810                 rate_control_tx_status(local, local->mdev, skb, status);
811         }
812
813         ieee80211_led_tx(local, 0);
814
815         /* SNMP counters
816          * Fragments are passed to low-level drivers as separate skbs, so these
817          * are actually fragments, not frames. Update frame counters only for
818          * the first fragment of the frame. */
819
820         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
821         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
822
823         if (status->flags & IEEE80211_TX_STATUS_ACK) {
824                 if (frag == 0) {
825                         local->dot11TransmittedFrameCount++;
826                         if (is_multicast_ether_addr(hdr->addr1))
827                                 local->dot11MulticastTransmittedFrameCount++;
828                         if (status->retry_count > 0)
829                                 local->dot11RetryCount++;
830                         if (status->retry_count > 1)
831                                 local->dot11MultipleRetryCount++;
832                 }
833
834                 /* This counter shall be incremented for an acknowledged MPDU
835                  * with an individual address in the address 1 field or an MPDU
836                  * with a multicast address in the address 1 field of type Data
837                  * or Management. */
838                 if (!is_multicast_ether_addr(hdr->addr1) ||
839                     type == IEEE80211_FTYPE_DATA ||
840                     type == IEEE80211_FTYPE_MGMT)
841                         local->dot11TransmittedFragmentCount++;
842         } else {
843                 if (frag == 0)
844                         local->dot11FailedCount++;
845         }
846
847         /* this was a transmitted frame, but now we want to reuse it */
848         skb_orphan(skb);
849
850         if (!local->monitors) {
851                 dev_kfree_skb(skb);
852                 return;
853         }
854
855         /* send frame to monitor interfaces now */
856
857         if (skb_headroom(skb) < sizeof(*rthdr)) {
858                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
859                 dev_kfree_skb(skb);
860                 return;
861         }
862
863         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
864                                 skb_push(skb, sizeof(*rthdr));
865
866         memset(rthdr, 0, sizeof(*rthdr));
867         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
868         rthdr->hdr.it_present =
869                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
870                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
871
872         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
873             !is_multicast_ether_addr(hdr->addr1))
874                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
875
876         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
877             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
878                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
879         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
880                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
881
882         rthdr->data_retries = status->retry_count;
883
884         rcu_read_lock();
885         monitors = local->monitors;
886         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
887                 /*
888                  * Using the monitors counter is possibly racy, but
889                  * if the value is wrong we simply either clone the skb
890                  * once too much or forget sending it to one monitor iface
891                  * The latter case isn't nice but fixing the race is much
892                  * more complicated.
893                  */
894                 if (!monitors || !skb)
895                         goto out;
896
897                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
898                         if (!netif_running(sdata->dev))
899                                 continue;
900                         monitors--;
901                         if (monitors)
902                                 skb2 = skb_clone(skb, GFP_ATOMIC);
903                         else
904                                 skb2 = NULL;
905                         skb->dev = sdata->dev;
906                         /* XXX: is this sufficient for BPF? */
907                         skb_set_mac_header(skb, 0);
908                         skb->ip_summed = CHECKSUM_UNNECESSARY;
909                         skb->pkt_type = PACKET_OTHERHOST;
910                         skb->protocol = htons(ETH_P_802_2);
911                         memset(skb->cb, 0, sizeof(skb->cb));
912                         netif_rx(skb);
913                         skb = skb2;
914                 }
915         }
916  out:
917         rcu_read_unlock();
918         if (skb)
919                 dev_kfree_skb(skb);
920 }
921 EXPORT_SYMBOL(ieee80211_tx_status);
922
923 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
924                                         const struct ieee80211_ops *ops)
925 {
926         struct net_device *mdev;
927         struct ieee80211_local *local;
928         struct ieee80211_sub_if_data *sdata;
929         int priv_size;
930         struct wiphy *wiphy;
931
932         /* Ensure 32-byte alignment of our private data and hw private data.
933          * We use the wiphy priv data for both our ieee80211_local and for
934          * the driver's private data
935          *
936          * In memory it'll be like this:
937          *
938          * +-------------------------+
939          * | struct wiphy           |
940          * +-------------------------+
941          * | struct ieee80211_local  |
942          * +-------------------------+
943          * | driver's private data   |
944          * +-------------------------+
945          *
946          */
947         priv_size = ((sizeof(struct ieee80211_local) +
948                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
949                     priv_data_len;
950
951         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
952
953         if (!wiphy)
954                 return NULL;
955
956         wiphy->privid = mac80211_wiphy_privid;
957
958         local = wiphy_priv(wiphy);
959         local->hw.wiphy = wiphy;
960
961         local->hw.priv = (char *)local +
962                          ((sizeof(struct ieee80211_local) +
963                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
964
965         BUG_ON(!ops->tx);
966         BUG_ON(!ops->start);
967         BUG_ON(!ops->stop);
968         BUG_ON(!ops->config);
969         BUG_ON(!ops->add_interface);
970         BUG_ON(!ops->remove_interface);
971         BUG_ON(!ops->configure_filter);
972         local->ops = ops;
973
974         /* for now, mdev needs sub_if_data :/ */
975         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
976                             "wmaster%d", ether_setup);
977         if (!mdev) {
978                 wiphy_free(wiphy);
979                 return NULL;
980         }
981
982         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
983         mdev->ieee80211_ptr = &sdata->wdev;
984         sdata->wdev.wiphy = wiphy;
985
986         local->hw.queues = 1; /* default */
987
988         local->mdev = mdev;
989         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
990         local->rx_handlers = ieee80211_rx_handlers;
991         local->tx_handlers = ieee80211_tx_handlers;
992
993         local->bridge_packets = 1;
994
995         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
996         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
997         local->short_retry_limit = 7;
998         local->long_retry_limit = 4;
999         local->hw.conf.radio_enabled = 1;
1000
1001         local->enabled_modes = ~0;
1002
1003         INIT_LIST_HEAD(&local->modes_list);
1004
1005         INIT_LIST_HEAD(&local->interfaces);
1006
1007         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1008         ieee80211_rx_bss_list_init(mdev);
1009
1010         sta_info_init(local);
1011
1012         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1013         mdev->open = ieee80211_master_open;
1014         mdev->stop = ieee80211_master_stop;
1015         mdev->type = ARPHRD_IEEE80211;
1016         mdev->header_ops = &ieee80211_header_ops;
1017         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1018
1019         sdata->type = IEEE80211_IF_TYPE_AP;
1020         sdata->dev = mdev;
1021         sdata->local = local;
1022         sdata->u.ap.force_unicast_rateidx = -1;
1023         sdata->u.ap.max_ratectrl_rateidx = -1;
1024         ieee80211_if_sdata_init(sdata);
1025         /* no RCU needed since we're still during init phase */
1026         list_add_tail(&sdata->list, &local->interfaces);
1027
1028         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1029                      (unsigned long)local);
1030         tasklet_disable(&local->tx_pending_tasklet);
1031
1032         tasklet_init(&local->tasklet,
1033                      ieee80211_tasklet_handler,
1034                      (unsigned long) local);
1035         tasklet_disable(&local->tasklet);
1036
1037         skb_queue_head_init(&local->skb_queue);
1038         skb_queue_head_init(&local->skb_queue_unreliable);
1039
1040         return local_to_hw(local);
1041 }
1042 EXPORT_SYMBOL(ieee80211_alloc_hw);
1043
1044 int ieee80211_register_hw(struct ieee80211_hw *hw)
1045 {
1046         struct ieee80211_local *local = hw_to_local(hw);
1047         const char *name;
1048         int result;
1049
1050         result = wiphy_register(local->hw.wiphy);
1051         if (result < 0)
1052                 return result;
1053
1054         name = wiphy_dev(local->hw.wiphy)->driver->name;
1055         local->hw.workqueue = create_singlethread_workqueue(name);
1056         if (!local->hw.workqueue) {
1057                 result = -ENOMEM;
1058                 goto fail_workqueue;
1059         }
1060
1061         /*
1062          * The hardware needs headroom for sending the frame,
1063          * and we need some headroom for passing the frame to monitor
1064          * interfaces, but never both at the same time.
1065          */
1066         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1067                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1068
1069         debugfs_hw_add(local);
1070
1071         local->hw.conf.beacon_int = 1000;
1072
1073         local->wstats_flags |= local->hw.max_rssi ?
1074                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1075         local->wstats_flags |= local->hw.max_signal ?
1076                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1077         local->wstats_flags |= local->hw.max_noise ?
1078                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1079         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1080                 local->wstats_flags |= IW_QUAL_DBM;
1081
1082         result = sta_info_start(local);
1083         if (result < 0)
1084                 goto fail_sta_info;
1085
1086         rtnl_lock();
1087         result = dev_alloc_name(local->mdev, local->mdev->name);
1088         if (result < 0)
1089                 goto fail_dev;
1090
1091         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1092         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1093
1094         result = register_netdevice(local->mdev);
1095         if (result < 0)
1096                 goto fail_dev;
1097
1098         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1099         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1100
1101         result = ieee80211_init_rate_ctrl_alg(local,
1102                                               hw->rate_control_algorithm);
1103         if (result < 0) {
1104                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1105                        "algorithm\n", wiphy_name(local->hw.wiphy));
1106                 goto fail_rate;
1107         }
1108
1109         result = ieee80211_wep_init(local);
1110
1111         if (result < 0) {
1112                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1113                        wiphy_name(local->hw.wiphy));
1114                 goto fail_wep;
1115         }
1116
1117         ieee80211_install_qdisc(local->mdev);
1118
1119         /* add one default STA interface */
1120         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1121                                   IEEE80211_IF_TYPE_STA);
1122         if (result)
1123                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1124                        wiphy_name(local->hw.wiphy));
1125
1126         local->reg_state = IEEE80211_DEV_REGISTERED;
1127         rtnl_unlock();
1128
1129         ieee80211_led_init(local);
1130
1131         return 0;
1132
1133 fail_wep:
1134         rate_control_deinitialize(local);
1135 fail_rate:
1136         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1137         unregister_netdevice(local->mdev);
1138 fail_dev:
1139         rtnl_unlock();
1140         sta_info_stop(local);
1141 fail_sta_info:
1142         debugfs_hw_del(local);
1143         destroy_workqueue(local->hw.workqueue);
1144 fail_workqueue:
1145         wiphy_unregister(local->hw.wiphy);
1146         return result;
1147 }
1148 EXPORT_SYMBOL(ieee80211_register_hw);
1149
1150 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1151                               struct ieee80211_hw_mode *mode)
1152 {
1153         struct ieee80211_local *local = hw_to_local(hw);
1154         struct ieee80211_rate *rate;
1155         int i;
1156
1157         INIT_LIST_HEAD(&mode->list);
1158         list_add_tail(&mode->list, &local->modes_list);
1159
1160         local->hw_modes |= (1 << mode->mode);
1161         for (i = 0; i < mode->num_rates; i++) {
1162                 rate = &(mode->rates[i]);
1163                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1164         }
1165         ieee80211_prepare_rates(local, mode);
1166
1167         if (!local->oper_hw_mode) {
1168                 /* Default to this mode */
1169                 local->hw.conf.phymode = mode->mode;
1170                 local->oper_hw_mode = local->scan_hw_mode = mode;
1171                 local->oper_channel = local->scan_channel = &mode->channels[0];
1172                 local->hw.conf.mode = local->oper_hw_mode;
1173                 local->hw.conf.chan = local->oper_channel;
1174         }
1175
1176         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1177                 ieee80211_set_default_regdomain(mode);
1178
1179         return 0;
1180 }
1181 EXPORT_SYMBOL(ieee80211_register_hwmode);
1182
1183 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1184 {
1185         struct ieee80211_local *local = hw_to_local(hw);
1186         struct ieee80211_sub_if_data *sdata, *tmp;
1187         int i;
1188
1189         tasklet_kill(&local->tx_pending_tasklet);
1190         tasklet_kill(&local->tasklet);
1191
1192         rtnl_lock();
1193
1194         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1195
1196         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1197
1198         /*
1199          * At this point, interface list manipulations are fine
1200          * because the driver cannot be handing us frames any
1201          * more and the tasklet is killed.
1202          */
1203
1204         /*
1205          * First, we remove all non-master interfaces. Do this because they
1206          * may have bss pointer dependency on the master, and when we free
1207          * the master these would be freed as well, breaking our list
1208          * iteration completely.
1209          */
1210         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1211                 if (sdata->dev == local->mdev)
1212                         continue;
1213                 list_del(&sdata->list);
1214                 __ieee80211_if_del(local, sdata);
1215         }
1216
1217         /* then, finally, remove the master interface */
1218         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1219
1220         rtnl_unlock();
1221
1222         ieee80211_rx_bss_list_deinit(local->mdev);
1223         ieee80211_clear_tx_pending(local);
1224         sta_info_stop(local);
1225         rate_control_deinitialize(local);
1226         debugfs_hw_del(local);
1227
1228         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1229                 kfree(local->supp_rates[i]);
1230                 kfree(local->basic_rates[i]);
1231         }
1232
1233         if (skb_queue_len(&local->skb_queue)
1234                         || skb_queue_len(&local->skb_queue_unreliable))
1235                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1236                        wiphy_name(local->hw.wiphy));
1237         skb_queue_purge(&local->skb_queue);
1238         skb_queue_purge(&local->skb_queue_unreliable);
1239
1240         destroy_workqueue(local->hw.workqueue);
1241         wiphy_unregister(local->hw.wiphy);
1242         ieee80211_wep_free(local);
1243         ieee80211_led_exit(local);
1244 }
1245 EXPORT_SYMBOL(ieee80211_unregister_hw);
1246
1247 void ieee80211_free_hw(struct ieee80211_hw *hw)
1248 {
1249         struct ieee80211_local *local = hw_to_local(hw);
1250
1251         ieee80211_if_free(local->mdev);
1252         wiphy_free(local->hw.wiphy);
1253 }
1254 EXPORT_SYMBOL(ieee80211_free_hw);
1255
1256 static int __init ieee80211_init(void)
1257 {
1258         struct sk_buff *skb;
1259         int ret;
1260
1261         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1262
1263 #ifdef CONFIG_MAC80211_RCSIMPLE
1264         ret = ieee80211_rate_control_register(&mac80211_rcsimple);
1265         if (ret)
1266                 return ret;
1267 #endif
1268
1269         ret = ieee80211_wme_register();
1270         if (ret) {
1271 #ifdef CONFIG_MAC80211_RCSIMPLE
1272                 ieee80211_rate_control_unregister(&mac80211_rcsimple);
1273 #endif
1274                 printk(KERN_DEBUG "ieee80211_init: failed to "
1275                        "initialize WME (err=%d)\n", ret);
1276                 return ret;
1277         }
1278
1279         ieee80211_debugfs_netdev_init();
1280         ieee80211_regdomain_init();
1281
1282         return 0;
1283 }
1284
1285 static void __exit ieee80211_exit(void)
1286 {
1287 #ifdef CONFIG_MAC80211_RCSIMPLE
1288         ieee80211_rate_control_unregister(&mac80211_rcsimple);
1289 #endif
1290
1291         ieee80211_wme_unregister();
1292         ieee80211_debugfs_netdev_exit();
1293 }
1294
1295
1296 subsys_initcall(ieee80211_init);
1297 module_exit(ieee80211_exit);
1298
1299 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1300 MODULE_LICENSE("GPL");