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mac80211: Add radio led trigger
[deliverable/linux.git] / 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 #define SUPP_MCS_SET_LEN 16
38
39 /*
40 * For seeing transmitted packets on monitor interfaces
41 * we have a radiotap header too.
42 */
43 struct ieee80211_tx_status_rtap_hdr {
44 struct ieee80211_radiotap_header hdr;
45 __le16 tx_flags;
46 u8 data_retries;
47 } __attribute__ ((packed));
48
49 /* common interface routines */
50
51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 {
53 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
54 return ETH_ALEN;
55 }
56
57 /* must be called under mdev tx lock */
58 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 {
60 unsigned int changed_flags;
61 unsigned int new_flags = 0;
62
63 if (atomic_read(&local->iff_promiscs))
64 new_flags |= FIF_PROMISC_IN_BSS;
65
66 if (atomic_read(&local->iff_allmultis))
67 new_flags |= FIF_ALLMULTI;
68
69 if (local->monitors)
70 new_flags |= FIF_CONTROL |
71 FIF_OTHER_BSS |
72 FIF_BCN_PRBRESP_PROMISC;
73
74 changed_flags = local->filter_flags ^ new_flags;
75
76 /* be a bit nasty */
77 new_flags |= (1<<31);
78
79 local->ops->configure_filter(local_to_hw(local),
80 changed_flags, &new_flags,
81 local->mdev->mc_count,
82 local->mdev->mc_list);
83
84 WARN_ON(new_flags & (1<<31));
85
86 local->filter_flags = new_flags & ~(1<<31);
87 }
88
89 /* master interface */
90
91 static int ieee80211_master_open(struct net_device *dev)
92 {
93 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
94 struct ieee80211_sub_if_data *sdata;
95 int res = -EOPNOTSUPP;
96
97 /* we hold the RTNL here so can safely walk the list */
98 list_for_each_entry(sdata, &local->interfaces, list) {
99 if (sdata->dev != dev && netif_running(sdata->dev)) {
100 res = 0;
101 break;
102 }
103 }
104 return res;
105 }
106
107 static int ieee80211_master_stop(struct net_device *dev)
108 {
109 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
110 struct ieee80211_sub_if_data *sdata;
111
112 /* we hold the RTNL here so can safely walk the list */
113 list_for_each_entry(sdata, &local->interfaces, list)
114 if (sdata->dev != dev && netif_running(sdata->dev))
115 dev_close(sdata->dev);
116
117 return 0;
118 }
119
120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
121 {
122 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
123
124 ieee80211_configure_filter(local);
125 }
126
127 /* regular interfaces */
128
129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
130 {
131 /* FIX: what would be proper limits for MTU?
132 * This interface uses 802.3 frames. */
133 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
134 printk(KERN_WARNING "%s: invalid MTU %d\n",
135 dev->name, new_mtu);
136 return -EINVAL;
137 }
138
139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
140 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
142 dev->mtu = new_mtu;
143 return 0;
144 }
145
146 static inline int identical_mac_addr_allowed(int type1, int type2)
147 {
148 return (type1 == IEEE80211_IF_TYPE_MNTR ||
149 type2 == IEEE80211_IF_TYPE_MNTR ||
150 (type1 == IEEE80211_IF_TYPE_AP &&
151 type2 == IEEE80211_IF_TYPE_WDS) ||
152 (type1 == IEEE80211_IF_TYPE_WDS &&
153 (type2 == IEEE80211_IF_TYPE_WDS ||
154 type2 == IEEE80211_IF_TYPE_AP)) ||
155 (type1 == IEEE80211_IF_TYPE_AP &&
156 type2 == IEEE80211_IF_TYPE_VLAN) ||
157 (type1 == IEEE80211_IF_TYPE_VLAN &&
158 (type2 == IEEE80211_IF_TYPE_AP ||
159 type2 == IEEE80211_IF_TYPE_VLAN)));
160 }
161
162 static int ieee80211_open(struct net_device *dev)
163 {
164 struct ieee80211_sub_if_data *sdata, *nsdata;
165 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
166 struct ieee80211_if_init_conf conf;
167 int res;
168
169 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
170
171 /* we hold the RTNL here so can safely walk the list */
172 list_for_each_entry(nsdata, &local->interfaces, list) {
173 struct net_device *ndev = nsdata->dev;
174
175 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
176 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
177 /*
178 * check whether it may have the same address
179 */
180 if (!identical_mac_addr_allowed(sdata->type,
181 nsdata->type))
182 return -ENOTUNIQ;
183
184 /*
185 * can only add VLANs to enabled APs
186 */
187 if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
188 nsdata->type == IEEE80211_IF_TYPE_AP &&
189 netif_running(nsdata->dev))
190 sdata->u.vlan.ap = nsdata;
191 }
192 }
193
194 switch (sdata->type) {
195 case IEEE80211_IF_TYPE_WDS:
196 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
197 return -ENOLINK;
198 break;
199 case IEEE80211_IF_TYPE_VLAN:
200 if (!sdata->u.vlan.ap)
201 return -ENOLINK;
202 break;
203 case IEEE80211_IF_TYPE_AP:
204 case IEEE80211_IF_TYPE_STA:
205 case IEEE80211_IF_TYPE_MNTR:
206 case IEEE80211_IF_TYPE_IBSS:
207 /* no special treatment */
208 break;
209 case IEEE80211_IF_TYPE_INVALID:
210 /* cannot happen */
211 WARN_ON(1);
212 break;
213 }
214
215 if (local->open_count == 0) {
216 res = 0;
217 if (local->ops->start)
218 res = local->ops->start(local_to_hw(local));
219 if (res)
220 return res;
221 ieee80211_hw_config(local);
222 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
223 }
224
225 switch (sdata->type) {
226 case IEEE80211_IF_TYPE_VLAN:
227 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
228 /* no need to tell driver */
229 break;
230 case IEEE80211_IF_TYPE_MNTR:
231 /* must be before the call to ieee80211_configure_filter */
232 local->monitors++;
233 if (local->monitors == 1) {
234 netif_tx_lock_bh(local->mdev);
235 ieee80211_configure_filter(local);
236 netif_tx_unlock_bh(local->mdev);
237
238 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
239 }
240 break;
241 case IEEE80211_IF_TYPE_STA:
242 case IEEE80211_IF_TYPE_IBSS:
243 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
244 /* fall through */
245 default:
246 conf.if_id = dev->ifindex;
247 conf.type = sdata->type;
248 conf.mac_addr = dev->dev_addr;
249 res = local->ops->add_interface(local_to_hw(local), &conf);
250 if (res && !local->open_count && local->ops->stop)
251 local->ops->stop(local_to_hw(local));
252 if (res)
253 return res;
254
255 ieee80211_if_config(dev);
256 ieee80211_reset_erp_info(dev);
257 ieee80211_enable_keys(sdata);
258
259 if (sdata->type == IEEE80211_IF_TYPE_STA &&
260 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
261 netif_carrier_off(dev);
262 else
263 netif_carrier_on(dev);
264 }
265
266 if (local->open_count == 0) {
267 res = dev_open(local->mdev);
268 WARN_ON(res);
269 tasklet_enable(&local->tx_pending_tasklet);
270 tasklet_enable(&local->tasklet);
271 }
272
273 /*
274 * set_multicast_list will be invoked by the networking core
275 * which will check whether any increments here were done in
276 * error and sync them down to the hardware as filter flags.
277 */
278 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
279 atomic_inc(&local->iff_allmultis);
280
281 if (sdata->flags & IEEE80211_SDATA_PROMISC)
282 atomic_inc(&local->iff_promiscs);
283
284 local->open_count++;
285
286 netif_start_queue(dev);
287
288 return 0;
289 }
290
291 static int ieee80211_stop(struct net_device *dev)
292 {
293 struct ieee80211_sub_if_data *sdata;
294 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
295 struct ieee80211_if_init_conf conf;
296 struct sta_info *sta;
297 int i;
298
299 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
300
301 list_for_each_entry(sta, &local->sta_list, list) {
302 for (i = 0; i < STA_TID_NUM; i++)
303 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr,
304 i, WLAN_BACK_RECIPIENT,
305 WLAN_REASON_QSTA_LEAVE_QBSS);
306 }
307
308 netif_stop_queue(dev);
309
310 /*
311 * Don't count this interface for promisc/allmulti while it
312 * is down. dev_mc_unsync() will invoke set_multicast_list
313 * on the master interface which will sync these down to the
314 * hardware as filter flags.
315 */
316 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
317 atomic_dec(&local->iff_allmultis);
318
319 if (sdata->flags & IEEE80211_SDATA_PROMISC)
320 atomic_dec(&local->iff_promiscs);
321
322 dev_mc_unsync(local->mdev, dev);
323
324 /* down all dependent devices, that is VLANs */
325 if (sdata->type == IEEE80211_IF_TYPE_AP) {
326 struct ieee80211_sub_if_data *vlan, *tmp;
327
328 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
329 u.vlan.list)
330 dev_close(vlan->dev);
331 WARN_ON(!list_empty(&sdata->u.ap.vlans));
332 }
333
334 local->open_count--;
335
336 switch (sdata->type) {
337 case IEEE80211_IF_TYPE_VLAN:
338 list_del(&sdata->u.vlan.list);
339 sdata->u.vlan.ap = NULL;
340 /* no need to tell driver */
341 break;
342 case IEEE80211_IF_TYPE_MNTR:
343 local->monitors--;
344 if (local->monitors == 0) {
345 netif_tx_lock_bh(local->mdev);
346 ieee80211_configure_filter(local);
347 netif_tx_unlock_bh(local->mdev);
348
349 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
350 }
351 break;
352 case IEEE80211_IF_TYPE_STA:
353 case IEEE80211_IF_TYPE_IBSS:
354 sdata->u.sta.state = IEEE80211_DISABLED;
355 del_timer_sync(&sdata->u.sta.timer);
356 /*
357 * When we get here, the interface is marked down.
358 * Call synchronize_rcu() to wait for the RX path
359 * should it be using the interface and enqueuing
360 * frames at this very time on another CPU.
361 */
362 synchronize_rcu();
363 skb_queue_purge(&sdata->u.sta.skb_queue);
364
365 if (local->scan_dev == sdata->dev) {
366 if (!local->ops->hw_scan) {
367 local->sta_sw_scanning = 0;
368 cancel_delayed_work(&local->scan_work);
369 } else
370 local->sta_hw_scanning = 0;
371 }
372
373 flush_workqueue(local->hw.workqueue);
374
375 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
376 kfree(sdata->u.sta.extra_ie);
377 sdata->u.sta.extra_ie = NULL;
378 sdata->u.sta.extra_ie_len = 0;
379 /* fall through */
380 default:
381 conf.if_id = dev->ifindex;
382 conf.type = sdata->type;
383 conf.mac_addr = dev->dev_addr;
384 /* disable all keys for as long as this netdev is down */
385 ieee80211_disable_keys(sdata);
386 local->ops->remove_interface(local_to_hw(local), &conf);
387 }
388
389 if (local->open_count == 0) {
390 if (netif_running(local->mdev))
391 dev_close(local->mdev);
392
393 if (local->ops->stop)
394 local->ops->stop(local_to_hw(local));
395
396 ieee80211_led_radio(local, 0);
397
398 tasklet_disable(&local->tx_pending_tasklet);
399 tasklet_disable(&local->tasklet);
400 }
401
402 return 0;
403 }
404
405 static void ieee80211_set_multicast_list(struct net_device *dev)
406 {
407 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
408 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
409 int allmulti, promisc, sdata_allmulti, sdata_promisc;
410
411 allmulti = !!(dev->flags & IFF_ALLMULTI);
412 promisc = !!(dev->flags & IFF_PROMISC);
413 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
414 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
415
416 if (allmulti != sdata_allmulti) {
417 if (dev->flags & IFF_ALLMULTI)
418 atomic_inc(&local->iff_allmultis);
419 else
420 atomic_dec(&local->iff_allmultis);
421 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
422 }
423
424 if (promisc != sdata_promisc) {
425 if (dev->flags & IFF_PROMISC)
426 atomic_inc(&local->iff_promiscs);
427 else
428 atomic_dec(&local->iff_promiscs);
429 sdata->flags ^= IEEE80211_SDATA_PROMISC;
430 }
431
432 dev_mc_sync(local->mdev, dev);
433 }
434
435 static const struct header_ops ieee80211_header_ops = {
436 .create = eth_header,
437 .parse = header_parse_80211,
438 .rebuild = eth_rebuild_header,
439 .cache = eth_header_cache,
440 .cache_update = eth_header_cache_update,
441 };
442
443 /* Must not be called for mdev */
444 void ieee80211_if_setup(struct net_device *dev)
445 {
446 ether_setup(dev);
447 dev->hard_start_xmit = ieee80211_subif_start_xmit;
448 dev->wireless_handlers = &ieee80211_iw_handler_def;
449 dev->set_multicast_list = ieee80211_set_multicast_list;
450 dev->change_mtu = ieee80211_change_mtu;
451 dev->open = ieee80211_open;
452 dev->stop = ieee80211_stop;
453 dev->destructor = ieee80211_if_free;
454 }
455
456 /* WDS specialties */
457
458 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
459 {
460 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
461 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
462 struct sta_info *sta;
463 DECLARE_MAC_BUF(mac);
464
465 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
466 return 0;
467
468 /* Create STA entry for the new peer */
469 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
470 if (!sta)
471 return -ENOMEM;
472 sta_info_put(sta);
473
474 /* Remove STA entry for the old peer */
475 sta = sta_info_get(local, sdata->u.wds.remote_addr);
476 if (sta) {
477 sta_info_free(sta);
478 sta_info_put(sta);
479 } else {
480 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
481 "peer %s\n",
482 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
483 }
484
485 /* Update WDS link data */
486 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
487
488 return 0;
489 }
490
491 /* everything else */
492
493 static int __ieee80211_if_config(struct net_device *dev,
494 struct sk_buff *beacon,
495 struct ieee80211_tx_control *control)
496 {
497 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
498 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
499 struct ieee80211_if_conf conf;
500
501 if (!local->ops->config_interface || !netif_running(dev))
502 return 0;
503
504 memset(&conf, 0, sizeof(conf));
505 conf.type = sdata->type;
506 if (sdata->type == IEEE80211_IF_TYPE_STA ||
507 sdata->type == IEEE80211_IF_TYPE_IBSS) {
508 conf.bssid = sdata->u.sta.bssid;
509 conf.ssid = sdata->u.sta.ssid;
510 conf.ssid_len = sdata->u.sta.ssid_len;
511 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
512 conf.ssid = sdata->u.ap.ssid;
513 conf.ssid_len = sdata->u.ap.ssid_len;
514 conf.beacon = beacon;
515 conf.beacon_control = control;
516 }
517 return local->ops->config_interface(local_to_hw(local),
518 dev->ifindex, &conf);
519 }
520
521 int ieee80211_if_config(struct net_device *dev)
522 {
523 return __ieee80211_if_config(dev, NULL, NULL);
524 }
525
526 int ieee80211_if_config_beacon(struct net_device *dev)
527 {
528 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
529 struct ieee80211_tx_control control;
530 struct sk_buff *skb;
531
532 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
533 return 0;
534 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
535 if (!skb)
536 return -ENOMEM;
537 return __ieee80211_if_config(dev, skb, &control);
538 }
539
540 int ieee80211_hw_config(struct ieee80211_local *local)
541 {
542 struct ieee80211_hw_mode *mode;
543 struct ieee80211_channel *chan;
544 int ret = 0;
545
546 if (local->sta_sw_scanning) {
547 chan = local->scan_channel;
548 mode = local->scan_hw_mode;
549 } else {
550 chan = local->oper_channel;
551 mode = local->oper_hw_mode;
552 }
553
554 local->hw.conf.channel = chan->chan;
555 local->hw.conf.channel_val = chan->val;
556 if (!local->hw.conf.power_level) {
557 local->hw.conf.power_level = chan->power_level;
558 } else {
559 local->hw.conf.power_level = min(chan->power_level,
560 local->hw.conf.power_level);
561 }
562 local->hw.conf.freq = chan->freq;
563 local->hw.conf.phymode = mode->mode;
564 local->hw.conf.antenna_max = chan->antenna_max;
565 local->hw.conf.chan = chan;
566 local->hw.conf.mode = mode;
567
568 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
569 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
570 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
571 local->hw.conf.phymode);
572 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
573
574 if (local->open_count)
575 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
576
577 return ret;
578 }
579
580 /**
581 * ieee80211_hw_config_ht should be used only after legacy configuration
582 * has been determined, as ht configuration depends upon the hardware's
583 * HT abilities for a _specific_ band.
584 */
585 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
586 struct ieee80211_ht_info *req_ht_cap,
587 struct ieee80211_ht_bss_info *req_bss_cap)
588 {
589 struct ieee80211_conf *conf = &local->hw.conf;
590 struct ieee80211_hw_mode *mode = conf->mode;
591 int i;
592
593 /* HT is not supported */
594 if (!mode->ht_info.ht_supported) {
595 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
596 return -EOPNOTSUPP;
597 }
598
599 /* disable HT */
600 if (!enable_ht) {
601 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
602 } else {
603 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
604 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
605 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
606 conf->ht_conf.cap |=
607 mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
608 conf->ht_bss_conf.primary_channel =
609 req_bss_cap->primary_channel;
610 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
611 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
612 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
613 conf->ht_conf.supp_mcs_set[i] =
614 mode->ht_info.supp_mcs_set[i] &
615 req_ht_cap->supp_mcs_set[i];
616
617 /* In STA mode, this gives us indication
618 * to the AP's mode of operation */
619 conf->ht_conf.ht_supported = 1;
620 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
621 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
622 }
623
624 local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
625
626 return 0;
627 }
628
629 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
630 {
631 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
632 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
633 if (local->ops->erp_ie_changed)
634 local->ops->erp_ie_changed(local_to_hw(local), changes,
635 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
636 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
637 }
638
639 void ieee80211_reset_erp_info(struct net_device *dev)
640 {
641 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
642
643 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
644 IEEE80211_SDATA_SHORT_PREAMBLE);
645 ieee80211_erp_info_change_notify(dev,
646 IEEE80211_ERP_CHANGE_PROTECTION |
647 IEEE80211_ERP_CHANGE_PREAMBLE);
648 }
649
650 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
651 struct sk_buff *skb,
652 struct ieee80211_tx_status *status)
653 {
654 struct ieee80211_local *local = hw_to_local(hw);
655 struct ieee80211_tx_status *saved;
656 int tmp;
657
658 skb->dev = local->mdev;
659 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
660 if (unlikely(!saved)) {
661 if (net_ratelimit())
662 printk(KERN_WARNING "%s: Not enough memory, "
663 "dropping tx status", skb->dev->name);
664 /* should be dev_kfree_skb_irq, but due to this function being
665 * named _irqsafe instead of just _irq we can't be sure that
666 * people won't call it from non-irq contexts */
667 dev_kfree_skb_any(skb);
668 return;
669 }
670 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
671 /* copy pointer to saved status into skb->cb for use by tasklet */
672 memcpy(skb->cb, &saved, sizeof(saved));
673
674 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
675 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
676 &local->skb_queue : &local->skb_queue_unreliable, skb);
677 tmp = skb_queue_len(&local->skb_queue) +
678 skb_queue_len(&local->skb_queue_unreliable);
679 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
680 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
681 memcpy(&saved, skb->cb, sizeof(saved));
682 kfree(saved);
683 dev_kfree_skb_irq(skb);
684 tmp--;
685 I802_DEBUG_INC(local->tx_status_drop);
686 }
687 tasklet_schedule(&local->tasklet);
688 }
689 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
690
691 static void ieee80211_tasklet_handler(unsigned long data)
692 {
693 struct ieee80211_local *local = (struct ieee80211_local *) data;
694 struct sk_buff *skb;
695 struct ieee80211_rx_status rx_status;
696 struct ieee80211_tx_status *tx_status;
697
698 while ((skb = skb_dequeue(&local->skb_queue)) ||
699 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
700 switch (skb->pkt_type) {
701 case IEEE80211_RX_MSG:
702 /* status is in skb->cb */
703 memcpy(&rx_status, skb->cb, sizeof(rx_status));
704 /* Clear skb->type in order to not confuse kernel
705 * netstack. */
706 skb->pkt_type = 0;
707 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
708 break;
709 case IEEE80211_TX_STATUS_MSG:
710 /* get pointer to saved status out of skb->cb */
711 memcpy(&tx_status, skb->cb, sizeof(tx_status));
712 skb->pkt_type = 0;
713 ieee80211_tx_status(local_to_hw(local),
714 skb, tx_status);
715 kfree(tx_status);
716 break;
717 default: /* should never get here! */
718 printk(KERN_ERR "%s: Unknown message type (%d)\n",
719 wiphy_name(local->hw.wiphy), skb->pkt_type);
720 dev_kfree_skb(skb);
721 break;
722 }
723 }
724 }
725
726 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
727 * make a prepared TX frame (one that has been given to hw) to look like brand
728 * new IEEE 802.11 frame that is ready to go through TX processing again.
729 * Also, tx_packet_data in cb is restored from tx_control. */
730 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
731 struct ieee80211_key *key,
732 struct sk_buff *skb,
733 struct ieee80211_tx_control *control)
734 {
735 int hdrlen, iv_len, mic_len;
736 struct ieee80211_tx_packet_data *pkt_data;
737
738 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
739 pkt_data->ifindex = control->ifindex;
740 pkt_data->flags = 0;
741 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
742 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
743 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
744 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
745 if (control->flags & IEEE80211_TXCTL_REQUEUE)
746 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
747 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
748 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
749 pkt_data->queue = control->queue;
750
751 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
752
753 if (!key)
754 goto no_key;
755
756 switch (key->conf.alg) {
757 case ALG_WEP:
758 iv_len = WEP_IV_LEN;
759 mic_len = WEP_ICV_LEN;
760 break;
761 case ALG_TKIP:
762 iv_len = TKIP_IV_LEN;
763 mic_len = TKIP_ICV_LEN;
764 break;
765 case ALG_CCMP:
766 iv_len = CCMP_HDR_LEN;
767 mic_len = CCMP_MIC_LEN;
768 break;
769 default:
770 goto no_key;
771 }
772
773 if (skb->len >= mic_len &&
774 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
775 skb_trim(skb, skb->len - mic_len);
776 if (skb->len >= iv_len && skb->len > hdrlen) {
777 memmove(skb->data + iv_len, skb->data, hdrlen);
778 skb_pull(skb, iv_len);
779 }
780
781 no_key:
782 {
783 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
784 u16 fc = le16_to_cpu(hdr->frame_control);
785 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
786 fc &= ~IEEE80211_STYPE_QOS_DATA;
787 hdr->frame_control = cpu_to_le16(fc);
788 memmove(skb->data + 2, skb->data, hdrlen - 2);
789 skb_pull(skb, 2);
790 }
791 }
792 }
793
794 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
795 struct ieee80211_tx_status *status)
796 {
797 struct sk_buff *skb2;
798 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
799 struct ieee80211_local *local = hw_to_local(hw);
800 u16 frag, type;
801 struct ieee80211_tx_status_rtap_hdr *rthdr;
802 struct ieee80211_sub_if_data *sdata;
803 int monitors;
804
805 if (!status) {
806 printk(KERN_ERR
807 "%s: ieee80211_tx_status called with NULL status\n",
808 wiphy_name(local->hw.wiphy));
809 dev_kfree_skb(skb);
810 return;
811 }
812
813 if (status->excessive_retries) {
814 struct sta_info *sta;
815 sta = sta_info_get(local, hdr->addr1);
816 if (sta) {
817 if (sta->flags & WLAN_STA_PS) {
818 /* The STA is in power save mode, so assume
819 * that this TX packet failed because of that.
820 */
821 status->excessive_retries = 0;
822 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
823 }
824 sta_info_put(sta);
825 }
826 }
827
828 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
829 struct sta_info *sta;
830 sta = sta_info_get(local, hdr->addr1);
831 if (sta) {
832 sta->tx_filtered_count++;
833
834 /* Clear the TX filter mask for this STA when sending
835 * the next packet. If the STA went to power save mode,
836 * this will happen when it is waking up for the next
837 * time. */
838 sta->clear_dst_mask = 1;
839
840 /* TODO: Is the WLAN_STA_PS flag always set here or is
841 * the race between RX and TX status causing some
842 * packets to be filtered out before 80211.o gets an
843 * update for PS status? This seems to be the case, so
844 * no changes are likely to be needed. */
845 if (sta->flags & WLAN_STA_PS &&
846 skb_queue_len(&sta->tx_filtered) <
847 STA_MAX_TX_BUFFER) {
848 ieee80211_remove_tx_extra(local, sta->key,
849 skb,
850 &status->control);
851 skb_queue_tail(&sta->tx_filtered, skb);
852 } else if (!(sta->flags & WLAN_STA_PS) &&
853 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
854 /* Software retry the packet once */
855 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
856 ieee80211_remove_tx_extra(local, sta->key,
857 skb,
858 &status->control);
859 dev_queue_xmit(skb);
860 } else {
861 if (net_ratelimit()) {
862 printk(KERN_DEBUG "%s: dropped TX "
863 "filtered frame queue_len=%d "
864 "PS=%d @%lu\n",
865 wiphy_name(local->hw.wiphy),
866 skb_queue_len(
867 &sta->tx_filtered),
868 !!(sta->flags & WLAN_STA_PS),
869 jiffies);
870 }
871 dev_kfree_skb(skb);
872 }
873 sta_info_put(sta);
874 return;
875 }
876 } else
877 rate_control_tx_status(local->mdev, skb, status);
878
879 ieee80211_led_tx(local, 0);
880
881 /* SNMP counters
882 * Fragments are passed to low-level drivers as separate skbs, so these
883 * are actually fragments, not frames. Update frame counters only for
884 * the first fragment of the frame. */
885
886 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
887 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
888
889 if (status->flags & IEEE80211_TX_STATUS_ACK) {
890 if (frag == 0) {
891 local->dot11TransmittedFrameCount++;
892 if (is_multicast_ether_addr(hdr->addr1))
893 local->dot11MulticastTransmittedFrameCount++;
894 if (status->retry_count > 0)
895 local->dot11RetryCount++;
896 if (status->retry_count > 1)
897 local->dot11MultipleRetryCount++;
898 }
899
900 /* This counter shall be incremented for an acknowledged MPDU
901 * with an individual address in the address 1 field or an MPDU
902 * with a multicast address in the address 1 field of type Data
903 * or Management. */
904 if (!is_multicast_ether_addr(hdr->addr1) ||
905 type == IEEE80211_FTYPE_DATA ||
906 type == IEEE80211_FTYPE_MGMT)
907 local->dot11TransmittedFragmentCount++;
908 } else {
909 if (frag == 0)
910 local->dot11FailedCount++;
911 }
912
913 /* this was a transmitted frame, but now we want to reuse it */
914 skb_orphan(skb);
915
916 if (!local->monitors) {
917 dev_kfree_skb(skb);
918 return;
919 }
920
921 /* send frame to monitor interfaces now */
922
923 if (skb_headroom(skb) < sizeof(*rthdr)) {
924 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
925 dev_kfree_skb(skb);
926 return;
927 }
928
929 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
930 skb_push(skb, sizeof(*rthdr));
931
932 memset(rthdr, 0, sizeof(*rthdr));
933 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
934 rthdr->hdr.it_present =
935 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
936 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
937
938 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
939 !is_multicast_ether_addr(hdr->addr1))
940 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
941
942 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
943 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
944 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
945 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
946 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
947
948 rthdr->data_retries = status->retry_count;
949
950 rcu_read_lock();
951 monitors = local->monitors;
952 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
953 /*
954 * Using the monitors counter is possibly racy, but
955 * if the value is wrong we simply either clone the skb
956 * once too much or forget sending it to one monitor iface
957 * The latter case isn't nice but fixing the race is much
958 * more complicated.
959 */
960 if (!monitors || !skb)
961 goto out;
962
963 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
964 if (!netif_running(sdata->dev))
965 continue;
966 monitors--;
967 if (monitors)
968 skb2 = skb_clone(skb, GFP_ATOMIC);
969 else
970 skb2 = NULL;
971 skb->dev = sdata->dev;
972 /* XXX: is this sufficient for BPF? */
973 skb_set_mac_header(skb, 0);
974 skb->ip_summed = CHECKSUM_UNNECESSARY;
975 skb->pkt_type = PACKET_OTHERHOST;
976 skb->protocol = htons(ETH_P_802_2);
977 memset(skb->cb, 0, sizeof(skb->cb));
978 netif_rx(skb);
979 skb = skb2;
980 }
981 }
982 out:
983 rcu_read_unlock();
984 if (skb)
985 dev_kfree_skb(skb);
986 }
987 EXPORT_SYMBOL(ieee80211_tx_status);
988
989 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
990 const struct ieee80211_ops *ops)
991 {
992 struct net_device *mdev;
993 struct ieee80211_local *local;
994 struct ieee80211_sub_if_data *sdata;
995 int priv_size;
996 struct wiphy *wiphy;
997
998 /* Ensure 32-byte alignment of our private data and hw private data.
999 * We use the wiphy priv data for both our ieee80211_local and for
1000 * the driver's private data
1001 *
1002 * In memory it'll be like this:
1003 *
1004 * +-------------------------+
1005 * | struct wiphy |
1006 * +-------------------------+
1007 * | struct ieee80211_local |
1008 * +-------------------------+
1009 * | driver's private data |
1010 * +-------------------------+
1011 *
1012 */
1013 priv_size = ((sizeof(struct ieee80211_local) +
1014 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1015 priv_data_len;
1016
1017 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1018
1019 if (!wiphy)
1020 return NULL;
1021
1022 wiphy->privid = mac80211_wiphy_privid;
1023
1024 local = wiphy_priv(wiphy);
1025 local->hw.wiphy = wiphy;
1026
1027 local->hw.priv = (char *)local +
1028 ((sizeof(struct ieee80211_local) +
1029 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1030
1031 BUG_ON(!ops->tx);
1032 BUG_ON(!ops->start);
1033 BUG_ON(!ops->stop);
1034 BUG_ON(!ops->config);
1035 BUG_ON(!ops->add_interface);
1036 BUG_ON(!ops->remove_interface);
1037 BUG_ON(!ops->configure_filter);
1038 local->ops = ops;
1039
1040 /* for now, mdev needs sub_if_data :/ */
1041 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1042 "wmaster%d", ether_setup);
1043 if (!mdev) {
1044 wiphy_free(wiphy);
1045 return NULL;
1046 }
1047
1048 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1049 mdev->ieee80211_ptr = &sdata->wdev;
1050 sdata->wdev.wiphy = wiphy;
1051
1052 local->hw.queues = 1; /* default */
1053
1054 local->mdev = mdev;
1055 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1056 local->rx_handlers = ieee80211_rx_handlers;
1057 local->tx_handlers = ieee80211_tx_handlers;
1058
1059 local->bridge_packets = 1;
1060
1061 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1062 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1063 local->short_retry_limit = 7;
1064 local->long_retry_limit = 4;
1065 local->hw.conf.radio_enabled = 1;
1066
1067 local->enabled_modes = ~0;
1068
1069 INIT_LIST_HEAD(&local->modes_list);
1070
1071 INIT_LIST_HEAD(&local->interfaces);
1072
1073 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1074 ieee80211_rx_bss_list_init(mdev);
1075
1076 sta_info_init(local);
1077
1078 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1079 mdev->open = ieee80211_master_open;
1080 mdev->stop = ieee80211_master_stop;
1081 mdev->type = ARPHRD_IEEE80211;
1082 mdev->header_ops = &ieee80211_header_ops;
1083 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1084
1085 sdata->type = IEEE80211_IF_TYPE_AP;
1086 sdata->dev = mdev;
1087 sdata->local = local;
1088 sdata->u.ap.force_unicast_rateidx = -1;
1089 sdata->u.ap.max_ratectrl_rateidx = -1;
1090 ieee80211_if_sdata_init(sdata);
1091 /* no RCU needed since we're still during init phase */
1092 list_add_tail(&sdata->list, &local->interfaces);
1093
1094 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1095 (unsigned long)local);
1096 tasklet_disable(&local->tx_pending_tasklet);
1097
1098 tasklet_init(&local->tasklet,
1099 ieee80211_tasklet_handler,
1100 (unsigned long) local);
1101 tasklet_disable(&local->tasklet);
1102
1103 skb_queue_head_init(&local->skb_queue);
1104 skb_queue_head_init(&local->skb_queue_unreliable);
1105
1106 return local_to_hw(local);
1107 }
1108 EXPORT_SYMBOL(ieee80211_alloc_hw);
1109
1110 int ieee80211_register_hw(struct ieee80211_hw *hw)
1111 {
1112 struct ieee80211_local *local = hw_to_local(hw);
1113 const char *name;
1114 int result;
1115
1116 result = wiphy_register(local->hw.wiphy);
1117 if (result < 0)
1118 return result;
1119
1120 name = wiphy_dev(local->hw.wiphy)->driver->name;
1121 local->hw.workqueue = create_singlethread_workqueue(name);
1122 if (!local->hw.workqueue) {
1123 result = -ENOMEM;
1124 goto fail_workqueue;
1125 }
1126
1127 /*
1128 * The hardware needs headroom for sending the frame,
1129 * and we need some headroom for passing the frame to monitor
1130 * interfaces, but never both at the same time.
1131 */
1132 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1133 sizeof(struct ieee80211_tx_status_rtap_hdr));
1134
1135 debugfs_hw_add(local);
1136
1137 local->hw.conf.beacon_int = 1000;
1138
1139 local->wstats_flags |= local->hw.max_rssi ?
1140 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1141 local->wstats_flags |= local->hw.max_signal ?
1142 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1143 local->wstats_flags |= local->hw.max_noise ?
1144 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1145 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1146 local->wstats_flags |= IW_QUAL_DBM;
1147
1148 result = sta_info_start(local);
1149 if (result < 0)
1150 goto fail_sta_info;
1151
1152 rtnl_lock();
1153 result = dev_alloc_name(local->mdev, local->mdev->name);
1154 if (result < 0)
1155 goto fail_dev;
1156
1157 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1158 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1159
1160 result = register_netdevice(local->mdev);
1161 if (result < 0)
1162 goto fail_dev;
1163
1164 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1165 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1166
1167 result = ieee80211_init_rate_ctrl_alg(local,
1168 hw->rate_control_algorithm);
1169 if (result < 0) {
1170 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1171 "algorithm\n", wiphy_name(local->hw.wiphy));
1172 goto fail_rate;
1173 }
1174
1175 result = ieee80211_wep_init(local);
1176
1177 if (result < 0) {
1178 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1179 wiphy_name(local->hw.wiphy));
1180 goto fail_wep;
1181 }
1182
1183 ieee80211_install_qdisc(local->mdev);
1184
1185 /* add one default STA interface */
1186 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1187 IEEE80211_IF_TYPE_STA);
1188 if (result)
1189 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1190 wiphy_name(local->hw.wiphy));
1191
1192 local->reg_state = IEEE80211_DEV_REGISTERED;
1193 rtnl_unlock();
1194
1195 ieee80211_led_init(local);
1196
1197 return 0;
1198
1199 fail_wep:
1200 rate_control_deinitialize(local);
1201 fail_rate:
1202 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1203 unregister_netdevice(local->mdev);
1204 fail_dev:
1205 rtnl_unlock();
1206 sta_info_stop(local);
1207 fail_sta_info:
1208 debugfs_hw_del(local);
1209 destroy_workqueue(local->hw.workqueue);
1210 fail_workqueue:
1211 wiphy_unregister(local->hw.wiphy);
1212 return result;
1213 }
1214 EXPORT_SYMBOL(ieee80211_register_hw);
1215
1216 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1217 struct ieee80211_hw_mode *mode)
1218 {
1219 struct ieee80211_local *local = hw_to_local(hw);
1220 struct ieee80211_rate *rate;
1221 int i;
1222
1223 INIT_LIST_HEAD(&mode->list);
1224 list_add_tail(&mode->list, &local->modes_list);
1225
1226 local->hw_modes |= (1 << mode->mode);
1227 for (i = 0; i < mode->num_rates; i++) {
1228 rate = &(mode->rates[i]);
1229 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1230 }
1231 ieee80211_prepare_rates(local, mode);
1232
1233 if (!local->oper_hw_mode) {
1234 /* Default to this mode */
1235 local->hw.conf.phymode = mode->mode;
1236 local->oper_hw_mode = local->scan_hw_mode = mode;
1237 local->oper_channel = local->scan_channel = &mode->channels[0];
1238 local->hw.conf.mode = local->oper_hw_mode;
1239 local->hw.conf.chan = local->oper_channel;
1240 }
1241
1242 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1243 ieee80211_set_default_regdomain(mode);
1244
1245 return 0;
1246 }
1247 EXPORT_SYMBOL(ieee80211_register_hwmode);
1248
1249 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1250 {
1251 struct ieee80211_local *local = hw_to_local(hw);
1252 struct ieee80211_sub_if_data *sdata, *tmp;
1253 int i;
1254
1255 tasklet_kill(&local->tx_pending_tasklet);
1256 tasklet_kill(&local->tasklet);
1257
1258 rtnl_lock();
1259
1260 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1261
1262 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1263
1264 /*
1265 * At this point, interface list manipulations are fine
1266 * because the driver cannot be handing us frames any
1267 * more and the tasklet is killed.
1268 */
1269
1270 /*
1271 * First, we remove all non-master interfaces. Do this because they
1272 * may have bss pointer dependency on the master, and when we free
1273 * the master these would be freed as well, breaking our list
1274 * iteration completely.
1275 */
1276 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1277 if (sdata->dev == local->mdev)
1278 continue;
1279 list_del(&sdata->list);
1280 __ieee80211_if_del(local, sdata);
1281 }
1282
1283 /* then, finally, remove the master interface */
1284 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1285
1286 rtnl_unlock();
1287
1288 ieee80211_rx_bss_list_deinit(local->mdev);
1289 ieee80211_clear_tx_pending(local);
1290 sta_info_stop(local);
1291 rate_control_deinitialize(local);
1292 debugfs_hw_del(local);
1293
1294 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1295 kfree(local->supp_rates[i]);
1296 kfree(local->basic_rates[i]);
1297 }
1298
1299 if (skb_queue_len(&local->skb_queue)
1300 || skb_queue_len(&local->skb_queue_unreliable))
1301 printk(KERN_WARNING "%s: skb_queue not empty\n",
1302 wiphy_name(local->hw.wiphy));
1303 skb_queue_purge(&local->skb_queue);
1304 skb_queue_purge(&local->skb_queue_unreliable);
1305
1306 destroy_workqueue(local->hw.workqueue);
1307 wiphy_unregister(local->hw.wiphy);
1308 ieee80211_wep_free(local);
1309 ieee80211_led_exit(local);
1310 }
1311 EXPORT_SYMBOL(ieee80211_unregister_hw);
1312
1313 void ieee80211_free_hw(struct ieee80211_hw *hw)
1314 {
1315 struct ieee80211_local *local = hw_to_local(hw);
1316
1317 ieee80211_if_free(local->mdev);
1318 wiphy_free(local->hw.wiphy);
1319 }
1320 EXPORT_SYMBOL(ieee80211_free_hw);
1321
1322 static int __init ieee80211_init(void)
1323 {
1324 struct sk_buff *skb;
1325 int ret;
1326
1327 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1328
1329 ret = rc80211_simple_init();
1330 if (ret)
1331 goto fail;
1332
1333 ret = rc80211_pid_init();
1334 if (ret)
1335 goto fail_simple;
1336
1337 ret = ieee80211_wme_register();
1338 if (ret) {
1339 printk(KERN_DEBUG "ieee80211_init: failed to "
1340 "initialize WME (err=%d)\n", ret);
1341 goto fail_pid;
1342 }
1343
1344 ieee80211_debugfs_netdev_init();
1345 ieee80211_regdomain_init();
1346
1347 return 0;
1348
1349 fail_pid:
1350 rc80211_simple_exit();
1351 fail_simple:
1352 rc80211_pid_exit();
1353 fail:
1354 return ret;
1355 }
1356
1357 static void __exit ieee80211_exit(void)
1358 {
1359 rc80211_simple_exit();
1360 rc80211_pid_exit();
1361
1362 ieee80211_wme_unregister();
1363 ieee80211_debugfs_netdev_exit();
1364 }
1365
1366
1367 subsys_initcall(ieee80211_init);
1368 module_exit(ieee80211_exit);
1369
1370 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1371 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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