2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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.
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>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
48 /* common interface routines */
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
83 changed_flags = local->filter_flags ^ new_flags;
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
93 WARN_ON(new_flags & (1<<31));
95 local->filter_flags = new_flags & ~(1<<31);
98 /* master interface */
100 static int ieee80211_master_open(struct net_device *dev)
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
108 if (netif_running(sdata->dev)) {
117 netif_tx_start_all_queues(local->mdev);
122 static int ieee80211_master_stop(struct net_device *dev)
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
129 if (netif_running(sdata->dev))
130 dev_close(sdata->dev);
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
139 ieee80211_configure_filter(local);
142 /* regular interfaces */
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
165 static inline int identical_mac_addr_allowed(int type1, int type2)
167 return (type1 == IEEE80211_IF_TYPE_MNTR ||
168 type2 == IEEE80211_IF_TYPE_MNTR ||
169 (type1 == IEEE80211_IF_TYPE_AP &&
170 type2 == IEEE80211_IF_TYPE_WDS) ||
171 (type1 == IEEE80211_IF_TYPE_WDS &&
172 (type2 == IEEE80211_IF_TYPE_WDS ||
173 type2 == IEEE80211_IF_TYPE_AP)) ||
174 (type1 == IEEE80211_IF_TYPE_AP &&
175 type2 == IEEE80211_IF_TYPE_VLAN) ||
176 (type1 == IEEE80211_IF_TYPE_VLAN &&
177 (type2 == IEEE80211_IF_TYPE_AP ||
178 type2 == IEEE80211_IF_TYPE_VLAN)));
181 static int ieee80211_open(struct net_device *dev)
183 struct ieee80211_sub_if_data *sdata, *nsdata;
184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
185 struct sta_info *sta;
186 struct ieee80211_if_init_conf conf;
189 bool need_hw_reconfig = 0;
190 u8 null_addr[ETH_ALEN] = {0};
192 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
194 /* fail early if user set an invalid address */
195 if (compare_ether_addr(dev->dev_addr, null_addr) &&
196 !is_valid_ether_addr(dev->dev_addr))
197 return -EADDRNOTAVAIL;
199 /* we hold the RTNL here so can safely walk the list */
200 list_for_each_entry(nsdata, &local->interfaces, list) {
201 struct net_device *ndev = nsdata->dev;
203 if (ndev != dev && netif_running(ndev)) {
205 * Allow only a single IBSS interface to be up at any
206 * time. This is restricted because beacon distribution
207 * cannot work properly if both are in the same IBSS.
209 * To remove this restriction we'd have to disallow them
210 * from setting the same SSID on different IBSS interfaces
211 * belonging to the same hardware. Then, however, we're
212 * faced with having to adopt two different TSF timers...
214 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
215 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
219 * The remaining checks are only performed for interfaces
220 * with the same MAC address.
222 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
226 * check whether it may have the same address
228 if (!identical_mac_addr_allowed(sdata->vif.type,
233 * can only add VLANs to enabled APs
235 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
236 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
237 sdata->bss = &nsdata->u.ap;
241 switch (sdata->vif.type) {
242 case IEEE80211_IF_TYPE_WDS:
243 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
246 case IEEE80211_IF_TYPE_VLAN:
249 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
251 case IEEE80211_IF_TYPE_AP:
252 sdata->bss = &sdata->u.ap;
254 case IEEE80211_IF_TYPE_MESH_POINT:
255 if (!ieee80211_vif_is_mesh(&sdata->vif))
257 /* mesh ifaces must set allmulti to forward mcast traffic */
258 atomic_inc(&local->iff_allmultis);
260 case IEEE80211_IF_TYPE_STA:
261 case IEEE80211_IF_TYPE_MNTR:
262 case IEEE80211_IF_TYPE_IBSS:
263 /* no special treatment */
265 case IEEE80211_IF_TYPE_INVALID:
271 if (local->open_count == 0) {
273 if (local->ops->start)
274 res = local->ops->start(local_to_hw(local));
277 need_hw_reconfig = 1;
278 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
282 * Check all interfaces and copy the hopefully now-present
283 * MAC address to those that have the special null one.
285 list_for_each_entry(nsdata, &local->interfaces, list) {
286 struct net_device *ndev = nsdata->dev;
289 * No need to check netif_running since we do not allow
290 * it to start up with this invalid address.
292 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
293 memcpy(ndev->dev_addr,
294 local->hw.wiphy->perm_addr,
298 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
299 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
303 * Validate the MAC address for this device.
305 if (!is_valid_ether_addr(dev->dev_addr)) {
306 if (!local->open_count && local->ops->stop)
307 local->ops->stop(local_to_hw(local));
308 return -EADDRNOTAVAIL;
311 switch (sdata->vif.type) {
312 case IEEE80211_IF_TYPE_VLAN:
313 /* no need to tell driver */
315 case IEEE80211_IF_TYPE_MNTR:
316 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
317 local->cooked_mntrs++;
321 /* must be before the call to ieee80211_configure_filter */
323 if (local->monitors == 1)
324 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
326 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
327 local->fif_fcsfail++;
328 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
329 local->fif_plcpfail++;
330 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
331 local->fif_control++;
332 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
333 local->fif_other_bss++;
335 netif_addr_lock_bh(local->mdev);
336 ieee80211_configure_filter(local);
337 netif_addr_unlock_bh(local->mdev);
339 case IEEE80211_IF_TYPE_STA:
340 case IEEE80211_IF_TYPE_IBSS:
341 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
344 conf.vif = &sdata->vif;
345 conf.type = sdata->vif.type;
346 conf.mac_addr = dev->dev_addr;
347 res = local->ops->add_interface(local_to_hw(local), &conf);
351 if (ieee80211_vif_is_mesh(&sdata->vif))
352 ieee80211_start_mesh(sdata);
353 changed |= ieee80211_reset_erp_info(sdata);
354 ieee80211_bss_info_change_notify(sdata, changed);
355 ieee80211_enable_keys(sdata);
357 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
358 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
359 netif_carrier_off(dev);
361 netif_carrier_on(dev);
364 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
365 /* Create STA entry for the WDS peer */
366 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
370 goto err_del_interface;
373 /* no locking required since STA is not live yet */
374 sta->flags |= WLAN_STA_AUTHORIZED;
376 res = sta_info_insert(sta);
378 /* STA has been freed */
379 goto err_del_interface;
383 if (local->open_count == 0) {
384 res = dev_open(local->mdev);
387 goto err_del_interface;
388 tasklet_enable(&local->tx_pending_tasklet);
389 tasklet_enable(&local->tasklet);
393 * set_multicast_list will be invoked by the networking core
394 * which will check whether any increments here were done in
395 * error and sync them down to the hardware as filter flags.
397 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
398 atomic_inc(&local->iff_allmultis);
400 if (sdata->flags & IEEE80211_SDATA_PROMISC)
401 atomic_inc(&local->iff_promiscs);
404 if (need_hw_reconfig) {
405 ieee80211_hw_config(local);
407 * set default queue parameters so drivers don't
408 * need to initialise the hardware if the hardware
409 * doesn't start up with sane defaults
411 ieee80211_set_wmm_default(sdata);
415 * ieee80211_sta_work is disabled while network interface
416 * is down. Therefore, some configuration changes may not
417 * yet be effective. Trigger execution of ieee80211_sta_work
420 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
421 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
422 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
423 queue_work(local->hw.workqueue, &ifsta->work);
426 netif_tx_start_all_queues(dev);
430 local->ops->remove_interface(local_to_hw(local), &conf);
432 if (!local->open_count && local->ops->stop)
433 local->ops->stop(local_to_hw(local));
436 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
437 list_del(&sdata->u.vlan.list);
441 static int ieee80211_stop(struct net_device *dev)
443 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
444 struct ieee80211_local *local = sdata->local;
445 struct ieee80211_if_init_conf conf;
446 struct sta_info *sta;
449 * Stop TX on this interface first.
451 netif_tx_stop_all_queues(dev);
454 * Now delete all active aggregation sessions.
458 list_for_each_entry_rcu(sta, &local->sta_list, list) {
459 if (sta->sdata == sdata)
460 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
466 * Remove all stations associated with this interface.
468 * This must be done before calling ops->remove_interface()
469 * because otherwise we can later invoke ops->sta_notify()
470 * whenever the STAs are removed, and that invalidates driver
471 * assumptions about always getting a vif pointer that is valid
472 * (because if we remove a STA after ops->remove_interface()
473 * the driver will have removed the vif info already!)
475 * We could relax this and only unlink the stations from the
476 * hash table and list but keep them on a per-sdata list that
477 * will be inserted back again when the interface is brought
478 * up again, but I don't currently see a use case for that,
479 * except with WDS which gets a STA entry created when it is
482 sta_info_flush(local, sdata);
485 * Don't count this interface for promisc/allmulti while it
486 * is down. dev_mc_unsync() will invoke set_multicast_list
487 * on the master interface which will sync these down to the
488 * hardware as filter flags.
490 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
491 atomic_dec(&local->iff_allmultis);
493 if (sdata->flags & IEEE80211_SDATA_PROMISC)
494 atomic_dec(&local->iff_promiscs);
496 dev_mc_unsync(local->mdev, dev);
498 /* APs need special treatment */
499 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
500 struct ieee80211_sub_if_data *vlan, *tmp;
501 struct beacon_data *old_beacon = sdata->u.ap.beacon;
504 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
508 /* down all dependent devices, that is VLANs */
509 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
511 dev_close(vlan->dev);
512 WARN_ON(!list_empty(&sdata->u.ap.vlans));
517 switch (sdata->vif.type) {
518 case IEEE80211_IF_TYPE_VLAN:
519 list_del(&sdata->u.vlan.list);
520 /* no need to tell driver */
522 case IEEE80211_IF_TYPE_MNTR:
523 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
524 local->cooked_mntrs--;
529 if (local->monitors == 0)
530 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
532 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
533 local->fif_fcsfail--;
534 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
535 local->fif_plcpfail--;
536 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
537 local->fif_control--;
538 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
539 local->fif_other_bss--;
541 netif_addr_lock_bh(local->mdev);
542 ieee80211_configure_filter(local);
543 netif_addr_unlock_bh(local->mdev);
545 case IEEE80211_IF_TYPE_STA:
546 case IEEE80211_IF_TYPE_IBSS:
547 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
548 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
549 del_timer_sync(&sdata->u.sta.timer);
551 * If the timer fired while we waited for it, it will have
552 * requeued the work. Now the work will be running again
553 * but will not rearm the timer again because it checks
554 * whether the interface is running, which, at this point,
557 cancel_work_sync(&sdata->u.sta.work);
559 * When we get here, the interface is marked down.
560 * Call synchronize_rcu() to wait for the RX path
561 * should it be using the interface and enqueuing
562 * frames at this very time on another CPU.
565 skb_queue_purge(&sdata->u.sta.skb_queue);
567 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
568 kfree(sdata->u.sta.extra_ie);
569 sdata->u.sta.extra_ie = NULL;
570 sdata->u.sta.extra_ie_len = 0;
572 case IEEE80211_IF_TYPE_MESH_POINT:
573 if (ieee80211_vif_is_mesh(&sdata->vif)) {
574 /* allmulti is always set on mesh ifaces */
575 atomic_dec(&local->iff_allmultis);
576 ieee80211_stop_mesh(sdata);
580 if (local->scan_sdata == sdata) {
581 if (!local->ops->hw_scan)
582 cancel_delayed_work_sync(&local->scan_work);
584 * The software scan can no longer run now, so we can
585 * clear out the scan_sdata reference. However, the
586 * hardware scan may still be running. The complete
587 * function must be prepared to handle a NULL value.
589 local->scan_sdata = NULL;
591 * The memory barrier guarantees that another CPU
592 * that is hardware-scanning will now see the fact
593 * that this interface is gone.
597 * If software scanning, complete the scan but since
598 * the scan_sdata is NULL already don't send out a
599 * scan event to userspace -- the scan is incomplete.
601 if (local->sta_sw_scanning)
602 ieee80211_scan_completed(&local->hw);
605 conf.vif = &sdata->vif;
606 conf.type = sdata->vif.type;
607 conf.mac_addr = dev->dev_addr;
608 /* disable all keys for as long as this netdev is down */
609 ieee80211_disable_keys(sdata);
610 local->ops->remove_interface(local_to_hw(local), &conf);
615 if (local->open_count == 0) {
616 if (netif_running(local->mdev))
617 dev_close(local->mdev);
619 if (local->ops->stop)
620 local->ops->stop(local_to_hw(local));
622 ieee80211_led_radio(local, 0);
624 flush_workqueue(local->hw.workqueue);
626 tasklet_disable(&local->tx_pending_tasklet);
627 tasklet_disable(&local->tasklet);
633 static void ieee80211_set_multicast_list(struct net_device *dev)
635 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
636 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
637 int allmulti, promisc, sdata_allmulti, sdata_promisc;
639 allmulti = !!(dev->flags & IFF_ALLMULTI);
640 promisc = !!(dev->flags & IFF_PROMISC);
641 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
642 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
644 if (allmulti != sdata_allmulti) {
645 if (dev->flags & IFF_ALLMULTI)
646 atomic_inc(&local->iff_allmultis);
648 atomic_dec(&local->iff_allmultis);
649 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
652 if (promisc != sdata_promisc) {
653 if (dev->flags & IFF_PROMISC)
654 atomic_inc(&local->iff_promiscs);
656 atomic_dec(&local->iff_promiscs);
657 sdata->flags ^= IEEE80211_SDATA_PROMISC;
660 dev_mc_sync(local->mdev, dev);
663 static const struct header_ops ieee80211_header_ops = {
664 .create = eth_header,
665 .parse = header_parse_80211,
666 .rebuild = eth_rebuild_header,
667 .cache = eth_header_cache,
668 .cache_update = eth_header_cache_update,
671 void ieee80211_if_setup(struct net_device *dev)
674 dev->hard_start_xmit = ieee80211_subif_start_xmit;
675 dev->wireless_handlers = &ieee80211_iw_handler_def;
676 dev->set_multicast_list = ieee80211_set_multicast_list;
677 dev->change_mtu = ieee80211_change_mtu;
678 dev->open = ieee80211_open;
679 dev->stop = ieee80211_stop;
680 dev->destructor = free_netdev;
681 /* we will validate the address ourselves in ->open */
682 dev->validate_addr = NULL;
685 /* everything else */
687 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
689 struct ieee80211_local *local = sdata->local;
690 struct ieee80211_if_conf conf;
692 if (WARN_ON(!netif_running(sdata->dev)))
695 if (!local->ops->config_interface)
698 memset(&conf, 0, sizeof(conf));
699 conf.changed = changed;
701 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
702 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
703 conf.bssid = sdata->u.sta.bssid;
704 conf.ssid = sdata->u.sta.ssid;
705 conf.ssid_len = sdata->u.sta.ssid_len;
706 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
707 conf.bssid = sdata->dev->dev_addr;
708 conf.ssid = sdata->u.ap.ssid;
709 conf.ssid_len = sdata->u.ap.ssid_len;
710 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
711 u8 zero[ETH_ALEN] = { 0 };
720 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
723 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
726 return local->ops->config_interface(local_to_hw(local),
730 int ieee80211_hw_config(struct ieee80211_local *local)
732 struct ieee80211_channel *chan;
735 if (local->sta_sw_scanning)
736 chan = local->scan_channel;
738 chan = local->oper_channel;
740 local->hw.conf.channel = chan;
742 if (!local->hw.conf.power_level)
743 local->hw.conf.power_level = chan->max_power;
745 local->hw.conf.power_level = min(chan->max_power,
746 local->hw.conf.power_level);
748 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
750 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
751 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
752 wiphy_name(local->hw.wiphy), chan->center_freq);
755 if (local->open_count)
756 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
762 * ieee80211_handle_ht should be used only after legacy configuration
763 * has been determined namely band, as ht configuration depends upon
764 * the hardware's HT abilities for a _specific_ band.
766 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
767 struct ieee80211_ht_info *req_ht_cap,
768 struct ieee80211_ht_bss_info *req_bss_cap)
770 struct ieee80211_conf *conf = &local->hw.conf;
771 struct ieee80211_supported_band *sband;
772 struct ieee80211_ht_info ht_conf;
773 struct ieee80211_ht_bss_info ht_bss_conf;
776 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
779 sband = local->hw.wiphy->bands[conf->channel->band];
781 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
782 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
784 /* HT is not supported */
785 if (!sband->ht_info.ht_supported) {
786 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
792 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
793 changed |= BSS_CHANGED_HT;
794 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
795 conf->ht_conf.ht_supported = 0;
800 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
801 changed |= BSS_CHANGED_HT;
803 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
804 ht_conf.ht_supported = 1;
806 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
807 ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS);
808 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS;
809 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
810 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
811 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
813 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
814 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
817 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
819 /* configure suppoerted Tx MCS according to requested MCS
820 * (based in most cases on Rx capabilities of peer) and self
821 * Tx MCS capabilities (as defined by low level driver HW
822 * Tx capabilities) */
823 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
826 /* Counting from 0 therfore + 1 */
827 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
828 max_tx_streams = ((tx_mcs_set_cap &
829 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
831 for (i = 0; i < max_tx_streams; i++)
832 ht_conf.supp_mcs_set[i] =
833 sband->ht_info.supp_mcs_set[i] &
834 req_ht_cap->supp_mcs_set[i];
836 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
837 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
838 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
839 ht_conf.supp_mcs_set[i] =
840 sband->ht_info.supp_mcs_set[i] &
841 req_ht_cap->supp_mcs_set[i];
844 /* if bss configuration changed store the new one */
845 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
846 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
847 changed |= BSS_CHANGED_HT;
848 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
849 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
855 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
858 struct ieee80211_local *local = sdata->local;
863 if (local->ops->bss_info_changed)
864 local->ops->bss_info_changed(local_to_hw(local),
870 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
872 sdata->bss_conf.use_cts_prot = 0;
873 sdata->bss_conf.use_short_preamble = 0;
874 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
877 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
880 struct ieee80211_local *local = hw_to_local(hw);
881 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
884 skb->dev = local->mdev;
885 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
886 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
887 &local->skb_queue : &local->skb_queue_unreliable, skb);
888 tmp = skb_queue_len(&local->skb_queue) +
889 skb_queue_len(&local->skb_queue_unreliable);
890 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
891 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
892 dev_kfree_skb_irq(skb);
894 I802_DEBUG_INC(local->tx_status_drop);
896 tasklet_schedule(&local->tasklet);
898 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
900 static void ieee80211_tasklet_handler(unsigned long data)
902 struct ieee80211_local *local = (struct ieee80211_local *) data;
904 struct ieee80211_rx_status rx_status;
905 struct ieee80211_ra_tid *ra_tid;
907 while ((skb = skb_dequeue(&local->skb_queue)) ||
908 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
909 switch (skb->pkt_type) {
910 case IEEE80211_RX_MSG:
911 /* status is in skb->cb */
912 memcpy(&rx_status, skb->cb, sizeof(rx_status));
913 /* Clear skb->pkt_type in order to not confuse kernel
916 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
918 case IEEE80211_TX_STATUS_MSG:
920 ieee80211_tx_status(local_to_hw(local), skb);
922 case IEEE80211_DELBA_MSG:
923 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
924 ieee80211_stop_tx_ba_cb(local_to_hw(local),
925 ra_tid->ra, ra_tid->tid);
928 case IEEE80211_ADDBA_MSG:
929 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
930 ieee80211_start_tx_ba_cb(local_to_hw(local),
931 ra_tid->ra, ra_tid->tid);
942 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
943 * make a prepared TX frame (one that has been given to hw) to look like brand
944 * new IEEE 802.11 frame that is ready to go through TX processing again.
946 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
947 struct ieee80211_key *key,
950 unsigned int hdrlen, iv_len, mic_len;
951 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
953 hdrlen = ieee80211_hdrlen(hdr->frame_control);
958 switch (key->conf.alg) {
961 mic_len = WEP_ICV_LEN;
964 iv_len = TKIP_IV_LEN;
965 mic_len = TKIP_ICV_LEN;
968 iv_len = CCMP_HDR_LEN;
969 mic_len = CCMP_MIC_LEN;
975 if (skb->len >= hdrlen + mic_len &&
976 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
977 skb_trim(skb, skb->len - mic_len);
978 if (skb->len >= hdrlen + iv_len) {
979 memmove(skb->data + iv_len, skb->data, hdrlen);
980 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
984 if (ieee80211_is_data_qos(hdr->frame_control)) {
985 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
986 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
987 hdrlen - IEEE80211_QOS_CTL_LEN);
988 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
992 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
993 struct sta_info *sta,
996 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
998 sta->tx_filtered_count++;
1001 * Clear the TX filter mask for this STA when sending the next
1002 * packet. If the STA went to power save mode, this will happen
1003 * when it wakes up for the next time.
1005 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1008 * This code races in the following way:
1010 * (1) STA sends frame indicating it will go to sleep and does so
1011 * (2) hardware/firmware adds STA to filter list, passes frame up
1012 * (3) hardware/firmware processes TX fifo and suppresses a frame
1013 * (4) we get TX status before having processed the frame and
1014 * knowing that the STA has gone to sleep.
1016 * This is actually quite unlikely even when both those events are
1017 * processed from interrupts coming in quickly after one another or
1018 * even at the same time because we queue both TX status events and
1019 * RX frames to be processed by a tasklet and process them in the
1020 * same order that they were received or TX status last. Hence, there
1021 * is no race as long as the frame RX is processed before the next TX
1022 * status, which drivers can ensure, see below.
1024 * Note that this can only happen if the hardware or firmware can
1025 * actually add STAs to the filter list, if this is done by the
1026 * driver in response to set_tim() (which will only reduce the race
1027 * this whole filtering tries to solve, not completely solve it)
1028 * this situation cannot happen.
1030 * To completely solve this race drivers need to make sure that they
1031 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1033 * (b) always process RX events before TX status events if ordering
1034 * can be unknown, for example with different interrupt status
1037 if (test_sta_flags(sta, WLAN_STA_PS) &&
1038 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1039 ieee80211_remove_tx_extra(local, sta->key, skb);
1040 skb_queue_tail(&sta->tx_filtered, skb);
1044 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1045 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1046 /* Software retry the packet once */
1047 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1048 ieee80211_remove_tx_extra(local, sta->key, skb);
1049 dev_queue_xmit(skb);
1053 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1054 if (net_ratelimit())
1055 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1056 "queue_len=%d PS=%d @%lu\n",
1057 wiphy_name(local->hw.wiphy),
1058 skb_queue_len(&sta->tx_filtered),
1059 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1064 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1066 struct sk_buff *skb2;
1067 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1068 struct ieee80211_local *local = hw_to_local(hw);
1069 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1072 struct ieee80211_tx_status_rtap_hdr *rthdr;
1073 struct ieee80211_sub_if_data *sdata;
1074 struct net_device *prev_dev = NULL;
1075 struct sta_info *sta;
1079 if (info->status.excessive_retries) {
1080 sta = sta_info_get(local, hdr->addr1);
1082 if (test_sta_flags(sta, WLAN_STA_PS)) {
1084 * The STA is in power save mode, so assume
1085 * that this TX packet failed because of that.
1087 ieee80211_handle_filtered_frame(local, sta, skb);
1094 fc = hdr->frame_control;
1096 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1097 (ieee80211_is_data_qos(fc))) {
1100 sta = sta_info_get(local, hdr->addr1);
1102 qc = ieee80211_get_qos_ctl(hdr);
1104 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1105 & IEEE80211_SCTL_SEQ);
1106 ieee80211_send_bar(sta->sdata, hdr->addr1,
1111 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1112 sta = sta_info_get(local, hdr->addr1);
1114 ieee80211_handle_filtered_frame(local, sta, skb);
1119 rate_control_tx_status(local->mdev, skb);
1123 ieee80211_led_tx(local, 0);
1126 * Fragments are passed to low-level drivers as separate skbs, so these
1127 * are actually fragments, not frames. Update frame counters only for
1128 * the first fragment of the frame. */
1130 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1131 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1133 if (info->flags & IEEE80211_TX_STAT_ACK) {
1135 local->dot11TransmittedFrameCount++;
1136 if (is_multicast_ether_addr(hdr->addr1))
1137 local->dot11MulticastTransmittedFrameCount++;
1138 if (info->status.retry_count > 0)
1139 local->dot11RetryCount++;
1140 if (info->status.retry_count > 1)
1141 local->dot11MultipleRetryCount++;
1144 /* This counter shall be incremented for an acknowledged MPDU
1145 * with an individual address in the address 1 field or an MPDU
1146 * with a multicast address in the address 1 field of type Data
1148 if (!is_multicast_ether_addr(hdr->addr1) ||
1149 type == IEEE80211_FTYPE_DATA ||
1150 type == IEEE80211_FTYPE_MGMT)
1151 local->dot11TransmittedFragmentCount++;
1154 local->dot11FailedCount++;
1157 /* this was a transmitted frame, but now we want to reuse it */
1161 * This is a bit racy but we can avoid a lot of work
1164 if (!local->monitors && !local->cooked_mntrs) {
1169 /* send frame to monitor interfaces now */
1171 if (skb_headroom(skb) < sizeof(*rthdr)) {
1172 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1177 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1178 skb_push(skb, sizeof(*rthdr));
1180 memset(rthdr, 0, sizeof(*rthdr));
1181 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1182 rthdr->hdr.it_present =
1183 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1184 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1186 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1187 !is_multicast_ether_addr(hdr->addr1))
1188 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1190 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1191 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1192 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1193 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1194 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1196 rthdr->data_retries = info->status.retry_count;
1198 /* XXX: is this sufficient for BPF? */
1199 skb_set_mac_header(skb, 0);
1200 skb->ip_summed = CHECKSUM_UNNECESSARY;
1201 skb->pkt_type = PACKET_OTHERHOST;
1202 skb->protocol = htons(ETH_P_802_2);
1203 memset(skb->cb, 0, sizeof(skb->cb));
1206 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1207 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1208 if (!netif_running(sdata->dev))
1212 skb2 = skb_clone(skb, GFP_ATOMIC);
1214 skb2->dev = prev_dev;
1219 prev_dev = sdata->dev;
1223 skb->dev = prev_dev;
1230 EXPORT_SYMBOL(ieee80211_tx_status);
1232 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1233 const struct ieee80211_ops *ops)
1235 struct ieee80211_local *local;
1237 struct wiphy *wiphy;
1239 /* Ensure 32-byte alignment of our private data and hw private data.
1240 * We use the wiphy priv data for both our ieee80211_local and for
1241 * the driver's private data
1243 * In memory it'll be like this:
1245 * +-------------------------+
1247 * +-------------------------+
1248 * | struct ieee80211_local |
1249 * +-------------------------+
1250 * | driver's private data |
1251 * +-------------------------+
1254 priv_size = ((sizeof(struct ieee80211_local) +
1255 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1258 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1263 wiphy->privid = mac80211_wiphy_privid;
1265 local = wiphy_priv(wiphy);
1266 local->hw.wiphy = wiphy;
1268 local->hw.priv = (char *)local +
1269 ((sizeof(struct ieee80211_local) +
1270 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1273 BUG_ON(!ops->start);
1275 BUG_ON(!ops->config);
1276 BUG_ON(!ops->add_interface);
1277 BUG_ON(!ops->remove_interface);
1278 BUG_ON(!ops->configure_filter);
1281 local->hw.queues = 1; /* default */
1283 local->bridge_packets = 1;
1285 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1286 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1287 local->short_retry_limit = 7;
1288 local->long_retry_limit = 4;
1289 local->hw.conf.radio_enabled = 1;
1291 INIT_LIST_HEAD(&local->interfaces);
1293 spin_lock_init(&local->key_lock);
1295 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1297 sta_info_init(local);
1299 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1300 (unsigned long)local);
1301 tasklet_disable(&local->tx_pending_tasklet);
1303 tasklet_init(&local->tasklet,
1304 ieee80211_tasklet_handler,
1305 (unsigned long) local);
1306 tasklet_disable(&local->tasklet);
1308 skb_queue_head_init(&local->skb_queue);
1309 skb_queue_head_init(&local->skb_queue_unreliable);
1311 return local_to_hw(local);
1313 EXPORT_SYMBOL(ieee80211_alloc_hw);
1315 int ieee80211_register_hw(struct ieee80211_hw *hw)
1317 struct ieee80211_local *local = hw_to_local(hw);
1320 enum ieee80211_band band;
1321 struct net_device *mdev;
1322 struct wireless_dev *mwdev;
1325 * generic code guarantees at least one band,
1326 * set this very early because much code assumes
1327 * that hw.conf.channel is assigned
1329 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1330 struct ieee80211_supported_band *sband;
1332 sband = local->hw.wiphy->bands[band];
1334 /* init channel we're on */
1335 local->hw.conf.channel =
1336 local->oper_channel =
1337 local->scan_channel = &sband->channels[0];
1342 /* if low-level driver supports AP, we also support VLAN */
1343 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
1344 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1346 /* mac80211 always supports monitor */
1347 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1349 result = wiphy_register(local->hw.wiphy);
1354 * We use the number of queues for feature tests (QoS, HT) internally
1355 * so restrict them appropriately.
1357 if (hw->queues > IEEE80211_MAX_QUEUES)
1358 hw->queues = IEEE80211_MAX_QUEUES;
1359 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1360 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1362 hw->ampdu_queues = 0;
1364 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1365 "wmaster%d", ether_setup,
1366 ieee80211_num_queues(hw));
1368 goto fail_mdev_alloc;
1370 mwdev = netdev_priv(mdev);
1371 mdev->ieee80211_ptr = mwdev;
1372 mwdev->wiphy = local->hw.wiphy;
1376 ieee80211_rx_bss_list_init(local);
1378 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1379 mdev->open = ieee80211_master_open;
1380 mdev->stop = ieee80211_master_stop;
1381 mdev->type = ARPHRD_IEEE80211;
1382 mdev->header_ops = &ieee80211_header_ops;
1383 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1385 name = wiphy_dev(local->hw.wiphy)->driver->name;
1386 local->hw.workqueue = create_freezeable_workqueue(name);
1387 if (!local->hw.workqueue) {
1389 goto fail_workqueue;
1393 * The hardware needs headroom for sending the frame,
1394 * and we need some headroom for passing the frame to monitor
1395 * interfaces, but never both at the same time.
1397 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1398 sizeof(struct ieee80211_tx_status_rtap_hdr));
1400 debugfs_hw_add(local);
1402 if (local->hw.conf.beacon_int < 10)
1403 local->hw.conf.beacon_int = 100;
1405 if (local->hw.max_listen_interval == 0)
1406 local->hw.max_listen_interval = 1;
1408 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1410 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1411 IEEE80211_HW_SIGNAL_DB |
1412 IEEE80211_HW_SIGNAL_DBM) ?
1413 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1414 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1415 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1416 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1417 local->wstats_flags |= IW_QUAL_DBM;
1419 result = sta_info_start(local);
1424 result = dev_alloc_name(local->mdev, local->mdev->name);
1428 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1429 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1431 result = register_netdevice(local->mdev);
1435 result = ieee80211_init_rate_ctrl_alg(local,
1436 hw->rate_control_algorithm);
1438 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1439 "algorithm\n", wiphy_name(local->hw.wiphy));
1443 result = ieee80211_wep_init(local);
1446 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1447 wiphy_name(local->hw.wiphy), result);
1451 local->mdev->select_queue = ieee80211_select_queue;
1453 /* add one default STA interface */
1454 result = ieee80211_if_add(local, "wlan%d", NULL,
1455 IEEE80211_IF_TYPE_STA, NULL);
1457 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1458 wiphy_name(local->hw.wiphy));
1462 ieee80211_led_init(local);
1467 rate_control_deinitialize(local);
1469 unregister_netdevice(local->mdev);
1473 sta_info_stop(local);
1475 debugfs_hw_del(local);
1476 destroy_workqueue(local->hw.workqueue);
1479 free_netdev(local->mdev);
1481 wiphy_unregister(local->hw.wiphy);
1484 EXPORT_SYMBOL(ieee80211_register_hw);
1486 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1488 struct ieee80211_local *local = hw_to_local(hw);
1490 tasklet_kill(&local->tx_pending_tasklet);
1491 tasklet_kill(&local->tasklet);
1496 * At this point, interface list manipulations are fine
1497 * because the driver cannot be handing us frames any
1498 * more and the tasklet is killed.
1501 /* First, we remove all virtual interfaces. */
1502 ieee80211_remove_interfaces(local);
1504 /* then, finally, remove the master interface */
1505 unregister_netdevice(local->mdev);
1509 ieee80211_rx_bss_list_deinit(local);
1510 ieee80211_clear_tx_pending(local);
1511 sta_info_stop(local);
1512 rate_control_deinitialize(local);
1513 debugfs_hw_del(local);
1515 if (skb_queue_len(&local->skb_queue)
1516 || skb_queue_len(&local->skb_queue_unreliable))
1517 printk(KERN_WARNING "%s: skb_queue not empty\n",
1518 wiphy_name(local->hw.wiphy));
1519 skb_queue_purge(&local->skb_queue);
1520 skb_queue_purge(&local->skb_queue_unreliable);
1522 destroy_workqueue(local->hw.workqueue);
1523 wiphy_unregister(local->hw.wiphy);
1524 ieee80211_wep_free(local);
1525 ieee80211_led_exit(local);
1526 free_netdev(local->mdev);
1528 EXPORT_SYMBOL(ieee80211_unregister_hw);
1530 void ieee80211_free_hw(struct ieee80211_hw *hw)
1532 struct ieee80211_local *local = hw_to_local(hw);
1534 wiphy_free(local->hw.wiphy);
1536 EXPORT_SYMBOL(ieee80211_free_hw);
1538 static int __init ieee80211_init(void)
1540 struct sk_buff *skb;
1543 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1544 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1545 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1547 ret = rc80211_pid_init();
1551 ieee80211_debugfs_netdev_init();
1556 static void __exit ieee80211_exit(void)
1561 * For key todo, it'll be empty by now but the work
1562 * might still be scheduled.
1564 flush_scheduled_work();
1569 ieee80211_debugfs_netdev_exit();
1573 subsys_initcall(ieee80211_init);
1574 module_exit(ieee80211_exit);
1576 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1577 MODULE_LICENSE("GPL");