mac80211: reconfigure tx on device reconfiguration
[linux-2.6.git] / net / mac80211 / iface.c
1 /*
2  * Interface handling (except master interface)
3  *
4  * Copyright 2002-2005, Instant802 Networks, Inc.
5  * Copyright 2005-2006, Devicescape Software, Inc.
6  * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12  */
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
21 #include "sta_info.h"
22 #include "debugfs_netdev.h"
23 #include "mesh.h"
24 #include "led.h"
25 #include "driver-ops.h"
26 #include "wme.h"
27 #include "rate.h"
28
29 /**
30  * DOC: Interface list locking
31  *
32  * The interface list in each struct ieee80211_local is protected
33  * three-fold:
34  *
35  * (1) modifications may only be done under the RTNL
36  * (2) modifications and readers are protected against each other by
37  *     the iflist_mtx.
38  * (3) modifications are done in an RCU manner so atomic readers
39  *     can traverse the list in RCU-safe blocks.
40  *
41  * As a consequence, reads (traversals) of the list can be protected
42  * by either the RTNL, the iflist_mtx or RCU.
43  */
44
45
46 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
47 {
48         int meshhdrlen;
49         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
50
51         meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
52
53         /* FIX: what would be proper limits for MTU?
54          * This interface uses 802.3 frames. */
55         if (new_mtu < 256 ||
56             new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
57                 return -EINVAL;
58         }
59
60 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
61         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
62 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
63         dev->mtu = new_mtu;
64         return 0;
65 }
66
67 static int ieee80211_change_mac(struct net_device *dev, void *addr)
68 {
69         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
70         struct sockaddr *sa = addr;
71         int ret;
72
73         if (ieee80211_sdata_running(sdata))
74                 return -EBUSY;
75
76         ret = eth_mac_addr(dev, sa);
77
78         if (ret == 0)
79                 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
80
81         return ret;
82 }
83
84 static inline int identical_mac_addr_allowed(int type1, int type2)
85 {
86         return type1 == NL80211_IFTYPE_MONITOR ||
87                 type2 == NL80211_IFTYPE_MONITOR ||
88                 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
89                 (type1 == NL80211_IFTYPE_WDS &&
90                         (type2 == NL80211_IFTYPE_WDS ||
91                          type2 == NL80211_IFTYPE_AP)) ||
92                 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
93                 (type1 == NL80211_IFTYPE_AP_VLAN &&
94                         (type2 == NL80211_IFTYPE_AP ||
95                          type2 == NL80211_IFTYPE_AP_VLAN));
96 }
97
98 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
99                                             enum nl80211_iftype iftype)
100 {
101         struct ieee80211_local *local = sdata->local;
102         struct ieee80211_sub_if_data *nsdata;
103         struct net_device *dev = sdata->dev;
104
105         ASSERT_RTNL();
106
107         /* we hold the RTNL here so can safely walk the list */
108         list_for_each_entry(nsdata, &local->interfaces, list) {
109                 struct net_device *ndev = nsdata->dev;
110
111                 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
112                         /*
113                          * Allow only a single IBSS interface to be up at any
114                          * time. This is restricted because beacon distribution
115                          * cannot work properly if both are in the same IBSS.
116                          *
117                          * To remove this restriction we'd have to disallow them
118                          * from setting the same SSID on different IBSS interfaces
119                          * belonging to the same hardware. Then, however, we're
120                          * faced with having to adopt two different TSF timers...
121                          */
122                         if (iftype == NL80211_IFTYPE_ADHOC &&
123                             nsdata->vif.type == NL80211_IFTYPE_ADHOC)
124                                 return -EBUSY;
125
126                         /*
127                          * The remaining checks are only performed for interfaces
128                          * with the same MAC address.
129                          */
130                         if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
131                                 continue;
132
133                         /*
134                          * check whether it may have the same address
135                          */
136                         if (!identical_mac_addr_allowed(iftype,
137                                                         nsdata->vif.type))
138                                 return -ENOTUNIQ;
139
140                         /*
141                          * can only add VLANs to enabled APs
142                          */
143                         if (iftype == NL80211_IFTYPE_AP_VLAN &&
144                             nsdata->vif.type == NL80211_IFTYPE_AP)
145                                 sdata->bss = &nsdata->u.ap;
146                 }
147         }
148
149         return 0;
150 }
151
152 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
153                                     const int offset)
154 {
155         struct ieee80211_local *local = sdata->local;
156         u32 flags = sdata->u.mntr_flags;
157
158 #define ADJUST(_f, _s)  do {                                    \
159         if (flags & MONITOR_FLAG_##_f)                          \
160                 local->fif_##_s += offset;                      \
161         } while (0)
162
163         ADJUST(FCSFAIL, fcsfail);
164         ADJUST(PLCPFAIL, plcpfail);
165         ADJUST(CONTROL, control);
166         ADJUST(CONTROL, pspoll);
167         ADJUST(OTHER_BSS, other_bss);
168
169 #undef ADJUST
170 }
171
172 /*
173  * NOTE: Be very careful when changing this function, it must NOT return
174  * an error on interface type changes that have been pre-checked, so most
175  * checks should be in ieee80211_check_concurrent_iface.
176  */
177 static int ieee80211_do_open(struct net_device *dev, bool coming_up)
178 {
179         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
180         struct ieee80211_local *local = sdata->local;
181         struct sta_info *sta;
182         u32 changed = 0;
183         int res;
184         u32 hw_reconf_flags = 0;
185
186         switch (sdata->vif.type) {
187         case NL80211_IFTYPE_WDS:
188                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
189                         return -ENOLINK;
190                 break;
191         case NL80211_IFTYPE_AP_VLAN:
192                 if (!sdata->bss)
193                         return -ENOLINK;
194                 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
195                 break;
196         case NL80211_IFTYPE_AP:
197                 sdata->bss = &sdata->u.ap;
198                 break;
199         case NL80211_IFTYPE_MESH_POINT:
200         case NL80211_IFTYPE_STATION:
201         case NL80211_IFTYPE_MONITOR:
202         case NL80211_IFTYPE_ADHOC:
203                 /* no special treatment */
204                 break;
205         case NL80211_IFTYPE_UNSPECIFIED:
206         case NUM_NL80211_IFTYPES:
207         case NL80211_IFTYPE_P2P_CLIENT:
208         case NL80211_IFTYPE_P2P_GO:
209                 /* cannot happen */
210                 WARN_ON(1);
211                 break;
212         }
213
214         if (local->open_count == 0) {
215                 res = drv_start(local);
216                 if (res)
217                         goto err_del_bss;
218                 if (local->ops->napi_poll)
219                         napi_enable(&local->napi);
220                 /* we're brought up, everything changes */
221                 hw_reconf_flags = ~0;
222                 ieee80211_led_radio(local, true);
223                 ieee80211_mod_tpt_led_trig(local,
224                                            IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
225         }
226
227         /*
228          * Copy the hopefully now-present MAC address to
229          * this interface, if it has the special null one.
230          */
231         if (is_zero_ether_addr(dev->dev_addr)) {
232                 memcpy(dev->dev_addr,
233                        local->hw.wiphy->perm_addr,
234                        ETH_ALEN);
235                 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
236
237                 if (!is_valid_ether_addr(dev->dev_addr)) {
238                         if (!local->open_count)
239                                 drv_stop(local);
240                         return -EADDRNOTAVAIL;
241                 }
242         }
243
244         switch (sdata->vif.type) {
245         case NL80211_IFTYPE_AP_VLAN:
246                 /* no need to tell driver */
247                 break;
248         case NL80211_IFTYPE_MONITOR:
249                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
250                         local->cooked_mntrs++;
251                         break;
252                 }
253
254                 /* must be before the call to ieee80211_configure_filter */
255                 local->monitors++;
256                 if (local->monitors == 1) {
257                         local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
258                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
259                 }
260
261                 ieee80211_adjust_monitor_flags(sdata, 1);
262                 ieee80211_configure_filter(local);
263
264                 netif_carrier_on(dev);
265                 break;
266         default:
267                 if (coming_up) {
268                         res = drv_add_interface(local, &sdata->vif);
269                         if (res)
270                                 goto err_stop;
271                 }
272
273                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
274                         local->fif_pspoll++;
275                         local->fif_probe_req++;
276
277                         ieee80211_configure_filter(local);
278                 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
279                         local->fif_probe_req++;
280                 }
281
282                 changed |= ieee80211_reset_erp_info(sdata);
283                 ieee80211_bss_info_change_notify(sdata, changed);
284
285                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
286                         netif_carrier_off(dev);
287                 else
288                         netif_carrier_on(dev);
289         }
290
291         set_bit(SDATA_STATE_RUNNING, &sdata->state);
292
293         if (sdata->vif.type == NL80211_IFTYPE_WDS) {
294                 /* Create STA entry for the WDS peer */
295                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
296                                      GFP_KERNEL);
297                 if (!sta) {
298                         res = -ENOMEM;
299                         goto err_del_interface;
300                 }
301
302                 /* no locking required since STA is not live yet */
303                 sta->flags |= WLAN_STA_AUTHORIZED;
304
305                 res = sta_info_insert(sta);
306                 if (res) {
307                         /* STA has been freed */
308                         goto err_del_interface;
309                 }
310
311                 rate_control_rate_init(sta);
312         }
313
314         /*
315          * set_multicast_list will be invoked by the networking core
316          * which will check whether any increments here were done in
317          * error and sync them down to the hardware as filter flags.
318          */
319         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
320                 atomic_inc(&local->iff_allmultis);
321
322         if (sdata->flags & IEEE80211_SDATA_PROMISC)
323                 atomic_inc(&local->iff_promiscs);
324
325         mutex_lock(&local->mtx);
326         hw_reconf_flags |= __ieee80211_recalc_idle(local);
327         mutex_unlock(&local->mtx);
328
329         if (coming_up)
330                 local->open_count++;
331
332         if (hw_reconf_flags) {
333                 ieee80211_hw_config(local, hw_reconf_flags);
334                 /*
335                  * set default queue parameters so drivers don't
336                  * need to initialise the hardware if the hardware
337                  * doesn't start up with sane defaults
338                  */
339                 ieee80211_set_wmm_default(sdata);
340         }
341
342         ieee80211_recalc_ps(local, -1);
343
344         netif_tx_start_all_queues(dev);
345
346         return 0;
347  err_del_interface:
348         drv_remove_interface(local, &sdata->vif);
349  err_stop:
350         if (!local->open_count)
351                 drv_stop(local);
352  err_del_bss:
353         sdata->bss = NULL;
354         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
355                 list_del(&sdata->u.vlan.list);
356         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
357         return res;
358 }
359
360 static int ieee80211_open(struct net_device *dev)
361 {
362         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
363         int err;
364
365         /* fail early if user set an invalid address */
366         if (!is_valid_ether_addr(dev->dev_addr))
367                 return -EADDRNOTAVAIL;
368
369         err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
370         if (err)
371                 return err;
372
373         return ieee80211_do_open(dev, true);
374 }
375
376 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
377                               bool going_down)
378 {
379         struct ieee80211_local *local = sdata->local;
380         unsigned long flags;
381         struct sk_buff *skb, *tmp;
382         u32 hw_reconf_flags = 0;
383         int i;
384         enum nl80211_channel_type orig_ct;
385
386         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
387
388         if (local->scan_sdata == sdata)
389                 ieee80211_scan_cancel(local);
390
391         /*
392          * Stop TX on this interface first.
393          */
394         netif_tx_stop_all_queues(sdata->dev);
395
396         /*
397          * Purge work for this interface.
398          */
399         ieee80211_work_purge(sdata);
400
401         /*
402          * Remove all stations associated with this interface.
403          *
404          * This must be done before calling ops->remove_interface()
405          * because otherwise we can later invoke ops->sta_notify()
406          * whenever the STAs are removed, and that invalidates driver
407          * assumptions about always getting a vif pointer that is valid
408          * (because if we remove a STA after ops->remove_interface()
409          * the driver will have removed the vif info already!)
410          *
411          * This is relevant only in AP, WDS and mesh modes, since in
412          * all other modes we've already removed all stations when
413          * disconnecting etc.
414          */
415         sta_info_flush(local, sdata);
416
417         /*
418          * Don't count this interface for promisc/allmulti while it
419          * is down. dev_mc_unsync() will invoke set_multicast_list
420          * on the master interface which will sync these down to the
421          * hardware as filter flags.
422          */
423         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
424                 atomic_dec(&local->iff_allmultis);
425
426         if (sdata->flags & IEEE80211_SDATA_PROMISC)
427                 atomic_dec(&local->iff_promiscs);
428
429         if (sdata->vif.type == NL80211_IFTYPE_AP) {
430                 local->fif_pspoll--;
431                 local->fif_probe_req--;
432         } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
433                 local->fif_probe_req--;
434         }
435
436         netif_addr_lock_bh(sdata->dev);
437         spin_lock_bh(&local->filter_lock);
438         __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
439                          sdata->dev->addr_len);
440         spin_unlock_bh(&local->filter_lock);
441         netif_addr_unlock_bh(sdata->dev);
442
443         ieee80211_configure_filter(local);
444
445         del_timer_sync(&local->dynamic_ps_timer);
446         cancel_work_sync(&local->dynamic_ps_enable_work);
447
448         /* APs need special treatment */
449         if (sdata->vif.type == NL80211_IFTYPE_AP) {
450                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
451                 struct beacon_data *old_beacon =
452                         rtnl_dereference(sdata->u.ap.beacon);
453
454                 /* sdata_running will return false, so this will disable */
455                 ieee80211_bss_info_change_notify(sdata,
456                                                  BSS_CHANGED_BEACON_ENABLED);
457
458                 /* remove beacon */
459                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
460                 synchronize_rcu();
461                 kfree(old_beacon);
462
463                 /* free all potentially still buffered bcast frames */
464                 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
465                         local->total_ps_buffered--;
466                         dev_kfree_skb(skb);
467                 }
468
469                 /* down all dependent devices, that is VLANs */
470                 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
471                                          u.vlan.list)
472                         dev_close(vlan->dev);
473                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
474         }
475
476         if (going_down)
477                 local->open_count--;
478
479         switch (sdata->vif.type) {
480         case NL80211_IFTYPE_AP_VLAN:
481                 list_del(&sdata->u.vlan.list);
482                 /* no need to tell driver */
483                 break;
484         case NL80211_IFTYPE_MONITOR:
485                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
486                         local->cooked_mntrs--;
487                         break;
488                 }
489
490                 local->monitors--;
491                 if (local->monitors == 0) {
492                         local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
493                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
494                 }
495
496                 ieee80211_adjust_monitor_flags(sdata, -1);
497                 ieee80211_configure_filter(local);
498                 break;
499         default:
500                 flush_work(&sdata->work);
501                 /*
502                  * When we get here, the interface is marked down.
503                  * Call synchronize_rcu() to wait for the RX path
504                  * should it be using the interface and enqueuing
505                  * frames at this very time on another CPU.
506                  */
507                 synchronize_rcu();
508                 skb_queue_purge(&sdata->skb_queue);
509
510                 /*
511                  * Disable beaconing here for mesh only, AP and IBSS
512                  * are already taken care of.
513                  */
514                 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
515                         ieee80211_bss_info_change_notify(sdata,
516                                 BSS_CHANGED_BEACON_ENABLED);
517
518                 /*
519                  * Free all remaining keys, there shouldn't be any,
520                  * except maybe group keys in AP more or WDS?
521                  */
522                 ieee80211_free_keys(sdata);
523
524                 if (going_down)
525                         drv_remove_interface(local, &sdata->vif);
526         }
527
528         sdata->bss = NULL;
529
530         mutex_lock(&local->mtx);
531         hw_reconf_flags |= __ieee80211_recalc_idle(local);
532         mutex_unlock(&local->mtx);
533
534         ieee80211_recalc_ps(local, -1);
535
536         if (local->open_count == 0) {
537                 if (local->ops->napi_poll)
538                         napi_disable(&local->napi);
539                 ieee80211_clear_tx_pending(local);
540                 ieee80211_stop_device(local);
541
542                 /* no reconfiguring after stop! */
543                 hw_reconf_flags = 0;
544         }
545
546         /* Re-calculate channel-type, in case there are multiple vifs
547          * on different channel types.
548          */
549         orig_ct = local->_oper_channel_type;
550         ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
551
552         /* do after stop to avoid reconfiguring when we stop anyway */
553         if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
554                 ieee80211_hw_config(local, hw_reconf_flags);
555
556         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
557         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
558                 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
559                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
560                         if (info->control.vif == &sdata->vif) {
561                                 __skb_unlink(skb, &local->pending[i]);
562                                 dev_kfree_skb_irq(skb);
563                         }
564                 }
565         }
566         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
567 }
568
569 static int ieee80211_stop(struct net_device *dev)
570 {
571         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
572
573         ieee80211_do_stop(sdata, true);
574
575         return 0;
576 }
577
578 static void ieee80211_set_multicast_list(struct net_device *dev)
579 {
580         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
581         struct ieee80211_local *local = sdata->local;
582         int allmulti, promisc, sdata_allmulti, sdata_promisc;
583
584         allmulti = !!(dev->flags & IFF_ALLMULTI);
585         promisc = !!(dev->flags & IFF_PROMISC);
586         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
587         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
588
589         if (allmulti != sdata_allmulti) {
590                 if (dev->flags & IFF_ALLMULTI)
591                         atomic_inc(&local->iff_allmultis);
592                 else
593                         atomic_dec(&local->iff_allmultis);
594                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
595         }
596
597         if (promisc != sdata_promisc) {
598                 if (dev->flags & IFF_PROMISC)
599                         atomic_inc(&local->iff_promiscs);
600                 else
601                         atomic_dec(&local->iff_promiscs);
602                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
603         }
604         spin_lock_bh(&local->filter_lock);
605         __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
606         spin_unlock_bh(&local->filter_lock);
607         ieee80211_queue_work(&local->hw, &local->reconfig_filter);
608 }
609
610 /*
611  * Called when the netdev is removed or, by the code below, before
612  * the interface type changes.
613  */
614 static void ieee80211_teardown_sdata(struct net_device *dev)
615 {
616         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
617         struct ieee80211_local *local = sdata->local;
618         int flushed;
619         int i;
620
621         /* free extra data */
622         ieee80211_free_keys(sdata);
623
624         ieee80211_debugfs_remove_netdev(sdata);
625
626         for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
627                 __skb_queue_purge(&sdata->fragments[i].skb_list);
628         sdata->fragment_next = 0;
629
630         if (ieee80211_vif_is_mesh(&sdata->vif))
631                 mesh_rmc_free(sdata);
632
633         flushed = sta_info_flush(local, sdata);
634         WARN_ON(flushed);
635 }
636
637 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
638                                          struct sk_buff *skb)
639 {
640         return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
641 }
642
643 static const struct net_device_ops ieee80211_dataif_ops = {
644         .ndo_open               = ieee80211_open,
645         .ndo_stop               = ieee80211_stop,
646         .ndo_uninit             = ieee80211_teardown_sdata,
647         .ndo_start_xmit         = ieee80211_subif_start_xmit,
648         .ndo_set_multicast_list = ieee80211_set_multicast_list,
649         .ndo_change_mtu         = ieee80211_change_mtu,
650         .ndo_set_mac_address    = ieee80211_change_mac,
651         .ndo_select_queue       = ieee80211_netdev_select_queue,
652 };
653
654 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
655                                           struct sk_buff *skb)
656 {
657         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
658         struct ieee80211_local *local = sdata->local;
659         struct ieee80211_hdr *hdr;
660         struct ieee80211_radiotap_header *rtap = (void *)skb->data;
661         u8 *p;
662
663         if (local->hw.queues < 4)
664                 return 0;
665
666         if (skb->len < 4 ||
667             skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
668                 return 0; /* doesn't matter, frame will be dropped */
669
670         hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
671
672         if (!ieee80211_is_data(hdr->frame_control)) {
673                 skb->priority = 7;
674                 return ieee802_1d_to_ac[skb->priority];
675         }
676         if (!ieee80211_is_data_qos(hdr->frame_control)) {
677                 skb->priority = 0;
678                 return ieee802_1d_to_ac[skb->priority];
679         }
680
681         p = ieee80211_get_qos_ctl(hdr);
682         skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
683
684         return ieee80211_downgrade_queue(local, skb);
685 }
686
687 static const struct net_device_ops ieee80211_monitorif_ops = {
688         .ndo_open               = ieee80211_open,
689         .ndo_stop               = ieee80211_stop,
690         .ndo_uninit             = ieee80211_teardown_sdata,
691         .ndo_start_xmit         = ieee80211_monitor_start_xmit,
692         .ndo_set_multicast_list = ieee80211_set_multicast_list,
693         .ndo_change_mtu         = ieee80211_change_mtu,
694         .ndo_set_mac_address    = eth_mac_addr,
695         .ndo_select_queue       = ieee80211_monitor_select_queue,
696 };
697
698 static void ieee80211_if_setup(struct net_device *dev)
699 {
700         ether_setup(dev);
701         dev->netdev_ops = &ieee80211_dataif_ops;
702         dev->destructor = free_netdev;
703 }
704
705 static void ieee80211_iface_work(struct work_struct *work)
706 {
707         struct ieee80211_sub_if_data *sdata =
708                 container_of(work, struct ieee80211_sub_if_data, work);
709         struct ieee80211_local *local = sdata->local;
710         struct sk_buff *skb;
711         struct sta_info *sta;
712         struct ieee80211_ra_tid *ra_tid;
713
714         if (!ieee80211_sdata_running(sdata))
715                 return;
716
717         if (local->scanning)
718                 return;
719
720         /*
721          * ieee80211_queue_work() should have picked up most cases,
722          * here we'll pick the rest.
723          */
724         if (WARN(local->suspended,
725                  "interface work scheduled while going to suspend\n"))
726                 return;
727
728         /* first process frames */
729         while ((skb = skb_dequeue(&sdata->skb_queue))) {
730                 struct ieee80211_mgmt *mgmt = (void *)skb->data;
731
732                 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
733                         ra_tid = (void *)&skb->cb;
734                         ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
735                                                  ra_tid->tid);
736                 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
737                         ra_tid = (void *)&skb->cb;
738                         ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
739                                                 ra_tid->tid);
740                 } else if (ieee80211_is_action(mgmt->frame_control) &&
741                            mgmt->u.action.category == WLAN_CATEGORY_BACK) {
742                         int len = skb->len;
743
744                         mutex_lock(&local->sta_mtx);
745                         sta = sta_info_get_bss(sdata, mgmt->sa);
746                         if (sta) {
747                                 switch (mgmt->u.action.u.addba_req.action_code) {
748                                 case WLAN_ACTION_ADDBA_REQ:
749                                         ieee80211_process_addba_request(
750                                                         local, sta, mgmt, len);
751                                         break;
752                                 case WLAN_ACTION_ADDBA_RESP:
753                                         ieee80211_process_addba_resp(local, sta,
754                                                                      mgmt, len);
755                                         break;
756                                 case WLAN_ACTION_DELBA:
757                                         ieee80211_process_delba(sdata, sta,
758                                                                 mgmt, len);
759                                         break;
760                                 default:
761                                         WARN_ON(1);
762                                         break;
763                                 }
764                         }
765                         mutex_unlock(&local->sta_mtx);
766                 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
767                         struct ieee80211_hdr *hdr = (void *)mgmt;
768                         /*
769                          * So the frame isn't mgmt, but frame_control
770                          * is at the right place anyway, of course, so
771                          * the if statement is correct.
772                          *
773                          * Warn if we have other data frame types here,
774                          * they must not get here.
775                          */
776                         WARN_ON(hdr->frame_control &
777                                         cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
778                         WARN_ON(!(hdr->seq_ctrl &
779                                         cpu_to_le16(IEEE80211_SCTL_FRAG)));
780                         /*
781                          * This was a fragment of a frame, received while
782                          * a block-ack session was active. That cannot be
783                          * right, so terminate the session.
784                          */
785                         mutex_lock(&local->sta_mtx);
786                         sta = sta_info_get_bss(sdata, mgmt->sa);
787                         if (sta) {
788                                 u16 tid = *ieee80211_get_qos_ctl(hdr) &
789                                                 IEEE80211_QOS_CTL_TID_MASK;
790
791                                 __ieee80211_stop_rx_ba_session(
792                                         sta, tid, WLAN_BACK_RECIPIENT,
793                                         WLAN_REASON_QSTA_REQUIRE_SETUP,
794                                         true);
795                         }
796                         mutex_unlock(&local->sta_mtx);
797                 } else switch (sdata->vif.type) {
798                 case NL80211_IFTYPE_STATION:
799                         ieee80211_sta_rx_queued_mgmt(sdata, skb);
800                         break;
801                 case NL80211_IFTYPE_ADHOC:
802                         ieee80211_ibss_rx_queued_mgmt(sdata, skb);
803                         break;
804                 case NL80211_IFTYPE_MESH_POINT:
805                         if (!ieee80211_vif_is_mesh(&sdata->vif))
806                                 break;
807                         ieee80211_mesh_rx_queued_mgmt(sdata, skb);
808                         break;
809                 default:
810                         WARN(1, "frame for unexpected interface type");
811                         break;
812                 }
813
814                 kfree_skb(skb);
815         }
816
817         /* then other type-dependent work */
818         switch (sdata->vif.type) {
819         case NL80211_IFTYPE_STATION:
820                 ieee80211_sta_work(sdata);
821                 break;
822         case NL80211_IFTYPE_ADHOC:
823                 ieee80211_ibss_work(sdata);
824                 break;
825         case NL80211_IFTYPE_MESH_POINT:
826                 if (!ieee80211_vif_is_mesh(&sdata->vif))
827                         break;
828                 ieee80211_mesh_work(sdata);
829                 break;
830         default:
831                 break;
832         }
833 }
834
835
836 /*
837  * Helper function to initialise an interface to a specific type.
838  */
839 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
840                                   enum nl80211_iftype type)
841 {
842         /* clear type-dependent union */
843         memset(&sdata->u, 0, sizeof(sdata->u));
844
845         /* and set some type-dependent values */
846         sdata->vif.type = type;
847         sdata->vif.p2p = false;
848         sdata->dev->netdev_ops = &ieee80211_dataif_ops;
849         sdata->wdev.iftype = type;
850
851         sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
852         sdata->control_port_no_encrypt = false;
853
854         /* only monitor differs */
855         sdata->dev->type = ARPHRD_ETHER;
856
857         skb_queue_head_init(&sdata->skb_queue);
858         INIT_WORK(&sdata->work, ieee80211_iface_work);
859
860         switch (type) {
861         case NL80211_IFTYPE_P2P_GO:
862                 type = NL80211_IFTYPE_AP;
863                 sdata->vif.type = type;
864                 sdata->vif.p2p = true;
865                 /* fall through */
866         case NL80211_IFTYPE_AP:
867                 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
868                 INIT_LIST_HEAD(&sdata->u.ap.vlans);
869                 break;
870         case NL80211_IFTYPE_P2P_CLIENT:
871                 type = NL80211_IFTYPE_STATION;
872                 sdata->vif.type = type;
873                 sdata->vif.p2p = true;
874                 /* fall through */
875         case NL80211_IFTYPE_STATION:
876                 ieee80211_sta_setup_sdata(sdata);
877                 break;
878         case NL80211_IFTYPE_ADHOC:
879                 ieee80211_ibss_setup_sdata(sdata);
880                 break;
881         case NL80211_IFTYPE_MESH_POINT:
882                 if (ieee80211_vif_is_mesh(&sdata->vif))
883                         ieee80211_mesh_init_sdata(sdata);
884                 break;
885         case NL80211_IFTYPE_MONITOR:
886                 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
887                 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
888                 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
889                                       MONITOR_FLAG_OTHER_BSS;
890                 break;
891         case NL80211_IFTYPE_WDS:
892         case NL80211_IFTYPE_AP_VLAN:
893                 break;
894         case NL80211_IFTYPE_UNSPECIFIED:
895         case NUM_NL80211_IFTYPES:
896                 BUG();
897                 break;
898         }
899
900         ieee80211_debugfs_add_netdev(sdata);
901 }
902
903 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
904                                            enum nl80211_iftype type)
905 {
906         struct ieee80211_local *local = sdata->local;
907         int ret, err;
908         enum nl80211_iftype internal_type = type;
909         bool p2p = false;
910
911         ASSERT_RTNL();
912
913         if (!local->ops->change_interface)
914                 return -EBUSY;
915
916         switch (sdata->vif.type) {
917         case NL80211_IFTYPE_AP:
918         case NL80211_IFTYPE_STATION:
919         case NL80211_IFTYPE_ADHOC:
920                 /*
921                  * Could maybe also all others here?
922                  * Just not sure how that interacts
923                  * with the RX/config path e.g. for
924                  * mesh.
925                  */
926                 break;
927         default:
928                 return -EBUSY;
929         }
930
931         switch (type) {
932         case NL80211_IFTYPE_AP:
933         case NL80211_IFTYPE_STATION:
934         case NL80211_IFTYPE_ADHOC:
935                 /*
936                  * Could probably support everything
937                  * but WDS here (WDS do_open can fail
938                  * under memory pressure, which this
939                  * code isn't prepared to handle).
940                  */
941                 break;
942         case NL80211_IFTYPE_P2P_CLIENT:
943                 p2p = true;
944                 internal_type = NL80211_IFTYPE_STATION;
945                 break;
946         case NL80211_IFTYPE_P2P_GO:
947                 p2p = true;
948                 internal_type = NL80211_IFTYPE_AP;
949                 break;
950         default:
951                 return -EBUSY;
952         }
953
954         ret = ieee80211_check_concurrent_iface(sdata, internal_type);
955         if (ret)
956                 return ret;
957
958         ieee80211_do_stop(sdata, false);
959
960         ieee80211_teardown_sdata(sdata->dev);
961
962         ret = drv_change_interface(local, sdata, internal_type, p2p);
963         if (ret)
964                 type = sdata->vif.type;
965
966         ieee80211_setup_sdata(sdata, type);
967
968         err = ieee80211_do_open(sdata->dev, false);
969         WARN(err, "type change: do_open returned %d", err);
970
971         return ret;
972 }
973
974 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
975                              enum nl80211_iftype type)
976 {
977         int ret;
978
979         ASSERT_RTNL();
980
981         if (type == ieee80211_vif_type_p2p(&sdata->vif))
982                 return 0;
983
984         /* Setting ad-hoc mode on non-IBSS channel is not supported. */
985         if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
986             type == NL80211_IFTYPE_ADHOC)
987                 return -EOPNOTSUPP;
988
989         if (ieee80211_sdata_running(sdata)) {
990                 ret = ieee80211_runtime_change_iftype(sdata, type);
991                 if (ret)
992                         return ret;
993         } else {
994                 /* Purge and reset type-dependent state. */
995                 ieee80211_teardown_sdata(sdata->dev);
996                 ieee80211_setup_sdata(sdata, type);
997         }
998
999         /* reset some values that shouldn't be kept across type changes */
1000         sdata->vif.bss_conf.basic_rates =
1001                 ieee80211_mandatory_rates(sdata->local,
1002                         sdata->local->hw.conf.channel->band);
1003         sdata->drop_unencrypted = 0;
1004         if (type == NL80211_IFTYPE_STATION)
1005                 sdata->u.mgd.use_4addr = false;
1006
1007         return 0;
1008 }
1009
1010 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1011                                        struct net_device *dev,
1012                                        enum nl80211_iftype type)
1013 {
1014         struct ieee80211_sub_if_data *sdata;
1015         u64 mask, start, addr, val, inc;
1016         u8 *m;
1017         u8 tmp_addr[ETH_ALEN];
1018         int i;
1019
1020         /* default ... something at least */
1021         memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1022
1023         if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1024             local->hw.wiphy->n_addresses <= 1)
1025                 return;
1026
1027
1028         mutex_lock(&local->iflist_mtx);
1029
1030         switch (type) {
1031         case NL80211_IFTYPE_MONITOR:
1032                 /* doesn't matter */
1033                 break;
1034         case NL80211_IFTYPE_WDS:
1035         case NL80211_IFTYPE_AP_VLAN:
1036                 /* match up with an AP interface */
1037                 list_for_each_entry(sdata, &local->interfaces, list) {
1038                         if (sdata->vif.type != NL80211_IFTYPE_AP)
1039                                 continue;
1040                         memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1041                         break;
1042                 }
1043                 /* keep default if no AP interface present */
1044                 break;
1045         default:
1046                 /* assign a new address if possible -- try n_addresses first */
1047                 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1048                         bool used = false;
1049
1050                         list_for_each_entry(sdata, &local->interfaces, list) {
1051                                 if (memcmp(local->hw.wiphy->addresses[i].addr,
1052                                            sdata->vif.addr, ETH_ALEN) == 0) {
1053                                         used = true;
1054                                         break;
1055                                 }
1056                         }
1057
1058                         if (!used) {
1059                                 memcpy(dev->perm_addr,
1060                                        local->hw.wiphy->addresses[i].addr,
1061                                        ETH_ALEN);
1062                                 break;
1063                         }
1064                 }
1065
1066                 /* try mask if available */
1067                 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1068                         break;
1069
1070                 m = local->hw.wiphy->addr_mask;
1071                 mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1072                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1073                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1074
1075                 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1076                         /* not a contiguous mask ... not handled now! */
1077                         printk(KERN_DEBUG "not contiguous\n");
1078                         break;
1079                 }
1080
1081                 m = local->hw.wiphy->perm_addr;
1082                 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1083                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1084                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1085
1086                 inc = 1ULL<<__ffs64(mask);
1087                 val = (start & mask);
1088                 addr = (start & ~mask) | (val & mask);
1089                 do {
1090                         bool used = false;
1091
1092                         tmp_addr[5] = addr >> 0*8;
1093                         tmp_addr[4] = addr >> 1*8;
1094                         tmp_addr[3] = addr >> 2*8;
1095                         tmp_addr[2] = addr >> 3*8;
1096                         tmp_addr[1] = addr >> 4*8;
1097                         tmp_addr[0] = addr >> 5*8;
1098
1099                         val += inc;
1100
1101                         list_for_each_entry(sdata, &local->interfaces, list) {
1102                                 if (memcmp(tmp_addr, sdata->vif.addr,
1103                                                         ETH_ALEN) == 0) {
1104                                         used = true;
1105                                         break;
1106                                 }
1107                         }
1108
1109                         if (!used) {
1110                                 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1111                                 break;
1112                         }
1113                         addr = (start & ~mask) | (val & mask);
1114                 } while (addr != start);
1115
1116                 break;
1117         }
1118
1119         mutex_unlock(&local->iflist_mtx);
1120 }
1121
1122 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1123                      struct net_device **new_dev, enum nl80211_iftype type,
1124                      struct vif_params *params)
1125 {
1126         struct net_device *ndev;
1127         struct ieee80211_sub_if_data *sdata = NULL;
1128         int ret, i;
1129
1130         ASSERT_RTNL();
1131
1132         ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1133                                 name, ieee80211_if_setup, local->hw.queues, 1);
1134         if (!ndev)
1135                 return -ENOMEM;
1136         dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1137
1138         ndev->needed_headroom = local->tx_headroom +
1139                                 4*6 /* four MAC addresses */
1140                                 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1141                                 + 6 /* mesh */
1142                                 + 8 /* rfc1042/bridge tunnel */
1143                                 - ETH_HLEN /* ethernet hard_header_len */
1144                                 + IEEE80211_ENCRYPT_HEADROOM;
1145         ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1146
1147         ret = dev_alloc_name(ndev, ndev->name);
1148         if (ret < 0)
1149                 goto fail;
1150
1151         ieee80211_assign_perm_addr(local, ndev, type);
1152         memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1153         SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1154
1155         /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1156         sdata = netdev_priv(ndev);
1157         ndev->ieee80211_ptr = &sdata->wdev;
1158         memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1159         memcpy(sdata->name, ndev->name, IFNAMSIZ);
1160
1161         /* initialise type-independent data */
1162         sdata->wdev.wiphy = local->hw.wiphy;
1163         sdata->local = local;
1164         sdata->dev = ndev;
1165 #ifdef CONFIG_INET
1166         sdata->arp_filter_state = true;
1167 #endif
1168
1169         for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1170                 skb_queue_head_init(&sdata->fragments[i].skb_list);
1171
1172         INIT_LIST_HEAD(&sdata->key_list);
1173
1174         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1175                 struct ieee80211_supported_band *sband;
1176                 sband = local->hw.wiphy->bands[i];
1177                 sdata->rc_rateidx_mask[i] =
1178                         sband ? (1 << sband->n_bitrates) - 1 : 0;
1179         }
1180
1181         /* setup type-dependent data */
1182         ieee80211_setup_sdata(sdata, type);
1183
1184         if (params) {
1185                 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1186                 if (type == NL80211_IFTYPE_STATION)
1187                         sdata->u.mgd.use_4addr = params->use_4addr;
1188         }
1189
1190         ret = register_netdevice(ndev);
1191         if (ret)
1192                 goto fail;
1193
1194         mutex_lock(&local->iflist_mtx);
1195         list_add_tail_rcu(&sdata->list, &local->interfaces);
1196         mutex_unlock(&local->iflist_mtx);
1197
1198         if (new_dev)
1199                 *new_dev = ndev;
1200
1201         return 0;
1202
1203  fail:
1204         free_netdev(ndev);
1205         return ret;
1206 }
1207
1208 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1209 {
1210         ASSERT_RTNL();
1211
1212         mutex_lock(&sdata->local->iflist_mtx);
1213         list_del_rcu(&sdata->list);
1214         mutex_unlock(&sdata->local->iflist_mtx);
1215
1216         synchronize_rcu();
1217         unregister_netdevice(sdata->dev);
1218 }
1219
1220 /*
1221  * Remove all interfaces, may only be called at hardware unregistration
1222  * time because it doesn't do RCU-safe list removals.
1223  */
1224 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1225 {
1226         struct ieee80211_sub_if_data *sdata, *tmp;
1227         LIST_HEAD(unreg_list);
1228
1229         ASSERT_RTNL();
1230
1231         mutex_lock(&local->iflist_mtx);
1232         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1233                 list_del(&sdata->list);
1234
1235                 unregister_netdevice_queue(sdata->dev, &unreg_list);
1236         }
1237         mutex_unlock(&local->iflist_mtx);
1238         unregister_netdevice_many(&unreg_list);
1239         list_del(&unreg_list);
1240 }
1241
1242 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1243                               const char *reason)
1244 {
1245         if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1246                 return 0;
1247
1248 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1249         wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1250 #endif
1251
1252         local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1253         return IEEE80211_CONF_CHANGE_IDLE;
1254 }
1255
1256 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1257 {
1258         if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1259                 return 0;
1260
1261 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1262         wiphy_debug(local->hw.wiphy, "device now idle\n");
1263 #endif
1264
1265         drv_flush(local, false);
1266
1267         local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1268         return IEEE80211_CONF_CHANGE_IDLE;
1269 }
1270
1271 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1272 {
1273         struct ieee80211_sub_if_data *sdata;
1274         int count = 0;
1275         bool working = false, scanning = false, hw_roc = false;
1276         struct ieee80211_work *wk;
1277         unsigned int led_trig_start = 0, led_trig_stop = 0;
1278
1279 #ifdef CONFIG_PROVE_LOCKING
1280         WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1281                 !lockdep_is_held(&local->iflist_mtx));
1282 #endif
1283         lockdep_assert_held(&local->mtx);
1284
1285         list_for_each_entry(sdata, &local->interfaces, list) {
1286                 if (!ieee80211_sdata_running(sdata)) {
1287                         sdata->vif.bss_conf.idle = true;
1288                         continue;
1289                 }
1290
1291                 sdata->old_idle = sdata->vif.bss_conf.idle;
1292
1293                 /* do not count disabled managed interfaces */
1294                 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1295                     !sdata->u.mgd.associated) {
1296                         sdata->vif.bss_conf.idle = true;
1297                         continue;
1298                 }
1299                 /* do not count unused IBSS interfaces */
1300                 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1301                     !sdata->u.ibss.ssid_len) {
1302                         sdata->vif.bss_conf.idle = true;
1303                         continue;
1304                 }
1305                 /* count everything else */
1306                 count++;
1307         }
1308
1309         list_for_each_entry(wk, &local->work_list, list) {
1310                 working = true;
1311                 wk->sdata->vif.bss_conf.idle = false;
1312         }
1313
1314         if (local->scan_sdata) {
1315                 scanning = true;
1316                 local->scan_sdata->vif.bss_conf.idle = false;
1317         }
1318
1319         if (local->hw_roc_channel)
1320                 hw_roc = true;
1321
1322         list_for_each_entry(sdata, &local->interfaces, list) {
1323                 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1324                         continue;
1325                 if (!ieee80211_sdata_running(sdata))
1326                         continue;
1327                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1328         }
1329
1330         if (working || scanning || hw_roc)
1331                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1332         else
1333                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1334
1335         if (count)
1336                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1337         else
1338                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1339
1340         ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1341
1342         if (hw_roc)
1343                 return ieee80211_idle_off(local, "hw remain-on-channel");
1344         if (working)
1345                 return ieee80211_idle_off(local, "working");
1346         if (scanning)
1347                 return ieee80211_idle_off(local, "scanning");
1348         if (!count)
1349                 return ieee80211_idle_on(local);
1350         else
1351                 return ieee80211_idle_off(local, "in use");
1352
1353         return 0;
1354 }
1355
1356 void ieee80211_recalc_idle(struct ieee80211_local *local)
1357 {
1358         u32 chg;
1359
1360         mutex_lock(&local->iflist_mtx);
1361         chg = __ieee80211_recalc_idle(local);
1362         mutex_unlock(&local->iflist_mtx);
1363         if (chg)
1364                 ieee80211_hw_config(local, chg);
1365 }
1366
1367 static int netdev_notify(struct notifier_block *nb,
1368                          unsigned long state,
1369                          void *ndev)
1370 {
1371         struct net_device *dev = ndev;
1372         struct ieee80211_sub_if_data *sdata;
1373
1374         if (state != NETDEV_CHANGENAME)
1375                 return 0;
1376
1377         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1378                 return 0;
1379
1380         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1381                 return 0;
1382
1383         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1384
1385         memcpy(sdata->name, dev->name, IFNAMSIZ);
1386
1387         ieee80211_debugfs_rename_netdev(sdata);
1388         return 0;
1389 }
1390
1391 static struct notifier_block mac80211_netdev_notifier = {
1392         .notifier_call = netdev_notify,
1393 };
1394
1395 int ieee80211_iface_init(void)
1396 {
1397         return register_netdevice_notifier(&mac80211_netdev_notifier);
1398 }
1399
1400 void ieee80211_iface_exit(void)
1401 {
1402         unregister_netdevice_notifier(&mac80211_netdev_notifier);
1403 }