net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared
[linux-3.10.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->priv_flags &= ~IFF_TX_SKB_SHARING;
702         dev->netdev_ops = &ieee80211_dataif_ops;
703         dev->destructor = free_netdev;
704 }
705
706 static void ieee80211_iface_work(struct work_struct *work)
707 {
708         struct ieee80211_sub_if_data *sdata =
709                 container_of(work, struct ieee80211_sub_if_data, work);
710         struct ieee80211_local *local = sdata->local;
711         struct sk_buff *skb;
712         struct sta_info *sta;
713         struct ieee80211_ra_tid *ra_tid;
714
715         if (!ieee80211_sdata_running(sdata))
716                 return;
717
718         if (local->scanning)
719                 return;
720
721         /*
722          * ieee80211_queue_work() should have picked up most cases,
723          * here we'll pick the rest.
724          */
725         if (WARN(local->suspended,
726                  "interface work scheduled while going to suspend\n"))
727                 return;
728
729         /* first process frames */
730         while ((skb = skb_dequeue(&sdata->skb_queue))) {
731                 struct ieee80211_mgmt *mgmt = (void *)skb->data;
732
733                 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
734                         ra_tid = (void *)&skb->cb;
735                         ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
736                                                  ra_tid->tid);
737                 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
738                         ra_tid = (void *)&skb->cb;
739                         ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
740                                                 ra_tid->tid);
741                 } else if (ieee80211_is_action(mgmt->frame_control) &&
742                            mgmt->u.action.category == WLAN_CATEGORY_BACK) {
743                         int len = skb->len;
744
745                         mutex_lock(&local->sta_mtx);
746                         sta = sta_info_get_bss(sdata, mgmt->sa);
747                         if (sta) {
748                                 switch (mgmt->u.action.u.addba_req.action_code) {
749                                 case WLAN_ACTION_ADDBA_REQ:
750                                         ieee80211_process_addba_request(
751                                                         local, sta, mgmt, len);
752                                         break;
753                                 case WLAN_ACTION_ADDBA_RESP:
754                                         ieee80211_process_addba_resp(local, sta,
755                                                                      mgmt, len);
756                                         break;
757                                 case WLAN_ACTION_DELBA:
758                                         ieee80211_process_delba(sdata, sta,
759                                                                 mgmt, len);
760                                         break;
761                                 default:
762                                         WARN_ON(1);
763                                         break;
764                                 }
765                         }
766                         mutex_unlock(&local->sta_mtx);
767                 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
768                         struct ieee80211_hdr *hdr = (void *)mgmt;
769                         /*
770                          * So the frame isn't mgmt, but frame_control
771                          * is at the right place anyway, of course, so
772                          * the if statement is correct.
773                          *
774                          * Warn if we have other data frame types here,
775                          * they must not get here.
776                          */
777                         WARN_ON(hdr->frame_control &
778                                         cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
779                         WARN_ON(!(hdr->seq_ctrl &
780                                         cpu_to_le16(IEEE80211_SCTL_FRAG)));
781                         /*
782                          * This was a fragment of a frame, received while
783                          * a block-ack session was active. That cannot be
784                          * right, so terminate the session.
785                          */
786                         mutex_lock(&local->sta_mtx);
787                         sta = sta_info_get_bss(sdata, mgmt->sa);
788                         if (sta) {
789                                 u16 tid = *ieee80211_get_qos_ctl(hdr) &
790                                                 IEEE80211_QOS_CTL_TID_MASK;
791
792                                 __ieee80211_stop_rx_ba_session(
793                                         sta, tid, WLAN_BACK_RECIPIENT,
794                                         WLAN_REASON_QSTA_REQUIRE_SETUP,
795                                         true);
796                         }
797                         mutex_unlock(&local->sta_mtx);
798                 } else switch (sdata->vif.type) {
799                 case NL80211_IFTYPE_STATION:
800                         ieee80211_sta_rx_queued_mgmt(sdata, skb);
801                         break;
802                 case NL80211_IFTYPE_ADHOC:
803                         ieee80211_ibss_rx_queued_mgmt(sdata, skb);
804                         break;
805                 case NL80211_IFTYPE_MESH_POINT:
806                         if (!ieee80211_vif_is_mesh(&sdata->vif))
807                                 break;
808                         ieee80211_mesh_rx_queued_mgmt(sdata, skb);
809                         break;
810                 default:
811                         WARN(1, "frame for unexpected interface type");
812                         break;
813                 }
814
815                 kfree_skb(skb);
816         }
817
818         /* then other type-dependent work */
819         switch (sdata->vif.type) {
820         case NL80211_IFTYPE_STATION:
821                 ieee80211_sta_work(sdata);
822                 break;
823         case NL80211_IFTYPE_ADHOC:
824                 ieee80211_ibss_work(sdata);
825                 break;
826         case NL80211_IFTYPE_MESH_POINT:
827                 if (!ieee80211_vif_is_mesh(&sdata->vif))
828                         break;
829                 ieee80211_mesh_work(sdata);
830                 break;
831         default:
832                 break;
833         }
834 }
835
836
837 /*
838  * Helper function to initialise an interface to a specific type.
839  */
840 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
841                                   enum nl80211_iftype type)
842 {
843         /* clear type-dependent union */
844         memset(&sdata->u, 0, sizeof(sdata->u));
845
846         /* and set some type-dependent values */
847         sdata->vif.type = type;
848         sdata->vif.p2p = false;
849         sdata->dev->netdev_ops = &ieee80211_dataif_ops;
850         sdata->wdev.iftype = type;
851
852         sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
853         sdata->control_port_no_encrypt = false;
854
855         /* only monitor differs */
856         sdata->dev->type = ARPHRD_ETHER;
857
858         skb_queue_head_init(&sdata->skb_queue);
859         INIT_WORK(&sdata->work, ieee80211_iface_work);
860
861         switch (type) {
862         case NL80211_IFTYPE_P2P_GO:
863                 type = NL80211_IFTYPE_AP;
864                 sdata->vif.type = type;
865                 sdata->vif.p2p = true;
866                 /* fall through */
867         case NL80211_IFTYPE_AP:
868                 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
869                 INIT_LIST_HEAD(&sdata->u.ap.vlans);
870                 break;
871         case NL80211_IFTYPE_P2P_CLIENT:
872                 type = NL80211_IFTYPE_STATION;
873                 sdata->vif.type = type;
874                 sdata->vif.p2p = true;
875                 /* fall through */
876         case NL80211_IFTYPE_STATION:
877                 ieee80211_sta_setup_sdata(sdata);
878                 break;
879         case NL80211_IFTYPE_ADHOC:
880                 ieee80211_ibss_setup_sdata(sdata);
881                 break;
882         case NL80211_IFTYPE_MESH_POINT:
883                 if (ieee80211_vif_is_mesh(&sdata->vif))
884                         ieee80211_mesh_init_sdata(sdata);
885                 break;
886         case NL80211_IFTYPE_MONITOR:
887                 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
888                 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
889                 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
890                                       MONITOR_FLAG_OTHER_BSS;
891                 break;
892         case NL80211_IFTYPE_WDS:
893         case NL80211_IFTYPE_AP_VLAN:
894                 break;
895         case NL80211_IFTYPE_UNSPECIFIED:
896         case NUM_NL80211_IFTYPES:
897                 BUG();
898                 break;
899         }
900
901         ieee80211_debugfs_add_netdev(sdata);
902 }
903
904 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
905                                            enum nl80211_iftype type)
906 {
907         struct ieee80211_local *local = sdata->local;
908         int ret, err;
909         enum nl80211_iftype internal_type = type;
910         bool p2p = false;
911
912         ASSERT_RTNL();
913
914         if (!local->ops->change_interface)
915                 return -EBUSY;
916
917         switch (sdata->vif.type) {
918         case NL80211_IFTYPE_AP:
919         case NL80211_IFTYPE_STATION:
920         case NL80211_IFTYPE_ADHOC:
921                 /*
922                  * Could maybe also all others here?
923                  * Just not sure how that interacts
924                  * with the RX/config path e.g. for
925                  * mesh.
926                  */
927                 break;
928         default:
929                 return -EBUSY;
930         }
931
932         switch (type) {
933         case NL80211_IFTYPE_AP:
934         case NL80211_IFTYPE_STATION:
935         case NL80211_IFTYPE_ADHOC:
936                 /*
937                  * Could probably support everything
938                  * but WDS here (WDS do_open can fail
939                  * under memory pressure, which this
940                  * code isn't prepared to handle).
941                  */
942                 break;
943         case NL80211_IFTYPE_P2P_CLIENT:
944                 p2p = true;
945                 internal_type = NL80211_IFTYPE_STATION;
946                 break;
947         case NL80211_IFTYPE_P2P_GO:
948                 p2p = true;
949                 internal_type = NL80211_IFTYPE_AP;
950                 break;
951         default:
952                 return -EBUSY;
953         }
954
955         ret = ieee80211_check_concurrent_iface(sdata, internal_type);
956         if (ret)
957                 return ret;
958
959         ieee80211_do_stop(sdata, false);
960
961         ieee80211_teardown_sdata(sdata->dev);
962
963         ret = drv_change_interface(local, sdata, internal_type, p2p);
964         if (ret)
965                 type = sdata->vif.type;
966
967         ieee80211_setup_sdata(sdata, type);
968
969         err = ieee80211_do_open(sdata->dev, false);
970         WARN(err, "type change: do_open returned %d", err);
971
972         return ret;
973 }
974
975 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
976                              enum nl80211_iftype type)
977 {
978         int ret;
979
980         ASSERT_RTNL();
981
982         if (type == ieee80211_vif_type_p2p(&sdata->vif))
983                 return 0;
984
985         /* Setting ad-hoc mode on non-IBSS channel is not supported. */
986         if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
987             type == NL80211_IFTYPE_ADHOC)
988                 return -EOPNOTSUPP;
989
990         if (ieee80211_sdata_running(sdata)) {
991                 ret = ieee80211_runtime_change_iftype(sdata, type);
992                 if (ret)
993                         return ret;
994         } else {
995                 /* Purge and reset type-dependent state. */
996                 ieee80211_teardown_sdata(sdata->dev);
997                 ieee80211_setup_sdata(sdata, type);
998         }
999
1000         /* reset some values that shouldn't be kept across type changes */
1001         sdata->vif.bss_conf.basic_rates =
1002                 ieee80211_mandatory_rates(sdata->local,
1003                         sdata->local->hw.conf.channel->band);
1004         sdata->drop_unencrypted = 0;
1005         if (type == NL80211_IFTYPE_STATION)
1006                 sdata->u.mgd.use_4addr = false;
1007
1008         return 0;
1009 }
1010
1011 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1012                                        struct net_device *dev,
1013                                        enum nl80211_iftype type)
1014 {
1015         struct ieee80211_sub_if_data *sdata;
1016         u64 mask, start, addr, val, inc;
1017         u8 *m;
1018         u8 tmp_addr[ETH_ALEN];
1019         int i;
1020
1021         /* default ... something at least */
1022         memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1023
1024         if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1025             local->hw.wiphy->n_addresses <= 1)
1026                 return;
1027
1028
1029         mutex_lock(&local->iflist_mtx);
1030
1031         switch (type) {
1032         case NL80211_IFTYPE_MONITOR:
1033                 /* doesn't matter */
1034                 break;
1035         case NL80211_IFTYPE_WDS:
1036         case NL80211_IFTYPE_AP_VLAN:
1037                 /* match up with an AP interface */
1038                 list_for_each_entry(sdata, &local->interfaces, list) {
1039                         if (sdata->vif.type != NL80211_IFTYPE_AP)
1040                                 continue;
1041                         memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1042                         break;
1043                 }
1044                 /* keep default if no AP interface present */
1045                 break;
1046         default:
1047                 /* assign a new address if possible -- try n_addresses first */
1048                 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1049                         bool used = false;
1050
1051                         list_for_each_entry(sdata, &local->interfaces, list) {
1052                                 if (memcmp(local->hw.wiphy->addresses[i].addr,
1053                                            sdata->vif.addr, ETH_ALEN) == 0) {
1054                                         used = true;
1055                                         break;
1056                                 }
1057                         }
1058
1059                         if (!used) {
1060                                 memcpy(dev->perm_addr,
1061                                        local->hw.wiphy->addresses[i].addr,
1062                                        ETH_ALEN);
1063                                 break;
1064                         }
1065                 }
1066
1067                 /* try mask if available */
1068                 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1069                         break;
1070
1071                 m = local->hw.wiphy->addr_mask;
1072                 mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1073                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1074                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1075
1076                 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1077                         /* not a contiguous mask ... not handled now! */
1078                         printk(KERN_DEBUG "not contiguous\n");
1079                         break;
1080                 }
1081
1082                 m = local->hw.wiphy->perm_addr;
1083                 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1084                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1085                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1086
1087                 inc = 1ULL<<__ffs64(mask);
1088                 val = (start & mask);
1089                 addr = (start & ~mask) | (val & mask);
1090                 do {
1091                         bool used = false;
1092
1093                         tmp_addr[5] = addr >> 0*8;
1094                         tmp_addr[4] = addr >> 1*8;
1095                         tmp_addr[3] = addr >> 2*8;
1096                         tmp_addr[2] = addr >> 3*8;
1097                         tmp_addr[1] = addr >> 4*8;
1098                         tmp_addr[0] = addr >> 5*8;
1099
1100                         val += inc;
1101
1102                         list_for_each_entry(sdata, &local->interfaces, list) {
1103                                 if (memcmp(tmp_addr, sdata->vif.addr,
1104                                                         ETH_ALEN) == 0) {
1105                                         used = true;
1106                                         break;
1107                                 }
1108                         }
1109
1110                         if (!used) {
1111                                 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1112                                 break;
1113                         }
1114                         addr = (start & ~mask) | (val & mask);
1115                 } while (addr != start);
1116
1117                 break;
1118         }
1119
1120         mutex_unlock(&local->iflist_mtx);
1121 }
1122
1123 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1124                      struct net_device **new_dev, enum nl80211_iftype type,
1125                      struct vif_params *params)
1126 {
1127         struct net_device *ndev;
1128         struct ieee80211_sub_if_data *sdata = NULL;
1129         int ret, i;
1130
1131         ASSERT_RTNL();
1132
1133         ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1134                                 name, ieee80211_if_setup, local->hw.queues, 1);
1135         if (!ndev)
1136                 return -ENOMEM;
1137         dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1138
1139         ndev->needed_headroom = local->tx_headroom +
1140                                 4*6 /* four MAC addresses */
1141                                 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1142                                 + 6 /* mesh */
1143                                 + 8 /* rfc1042/bridge tunnel */
1144                                 - ETH_HLEN /* ethernet hard_header_len */
1145                                 + IEEE80211_ENCRYPT_HEADROOM;
1146         ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1147
1148         ret = dev_alloc_name(ndev, ndev->name);
1149         if (ret < 0)
1150                 goto fail;
1151
1152         ieee80211_assign_perm_addr(local, ndev, type);
1153         memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1154         SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1155
1156         /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1157         sdata = netdev_priv(ndev);
1158         ndev->ieee80211_ptr = &sdata->wdev;
1159         memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1160         memcpy(sdata->name, ndev->name, IFNAMSIZ);
1161
1162         /* initialise type-independent data */
1163         sdata->wdev.wiphy = local->hw.wiphy;
1164         sdata->local = local;
1165         sdata->dev = ndev;
1166 #ifdef CONFIG_INET
1167         sdata->arp_filter_state = true;
1168 #endif
1169
1170         for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1171                 skb_queue_head_init(&sdata->fragments[i].skb_list);
1172
1173         INIT_LIST_HEAD(&sdata->key_list);
1174
1175         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1176                 struct ieee80211_supported_band *sband;
1177                 sband = local->hw.wiphy->bands[i];
1178                 sdata->rc_rateidx_mask[i] =
1179                         sband ? (1 << sband->n_bitrates) - 1 : 0;
1180         }
1181
1182         /* setup type-dependent data */
1183         ieee80211_setup_sdata(sdata, type);
1184
1185         if (params) {
1186                 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1187                 if (type == NL80211_IFTYPE_STATION)
1188                         sdata->u.mgd.use_4addr = params->use_4addr;
1189         }
1190
1191         ret = register_netdevice(ndev);
1192         if (ret)
1193                 goto fail;
1194
1195         mutex_lock(&local->iflist_mtx);
1196         list_add_tail_rcu(&sdata->list, &local->interfaces);
1197         mutex_unlock(&local->iflist_mtx);
1198
1199         if (new_dev)
1200                 *new_dev = ndev;
1201
1202         return 0;
1203
1204  fail:
1205         free_netdev(ndev);
1206         return ret;
1207 }
1208
1209 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1210 {
1211         ASSERT_RTNL();
1212
1213         mutex_lock(&sdata->local->iflist_mtx);
1214         list_del_rcu(&sdata->list);
1215         mutex_unlock(&sdata->local->iflist_mtx);
1216
1217         synchronize_rcu();
1218         unregister_netdevice(sdata->dev);
1219 }
1220
1221 /*
1222  * Remove all interfaces, may only be called at hardware unregistration
1223  * time because it doesn't do RCU-safe list removals.
1224  */
1225 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1226 {
1227         struct ieee80211_sub_if_data *sdata, *tmp;
1228         LIST_HEAD(unreg_list);
1229
1230         ASSERT_RTNL();
1231
1232         mutex_lock(&local->iflist_mtx);
1233         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1234                 list_del(&sdata->list);
1235
1236                 unregister_netdevice_queue(sdata->dev, &unreg_list);
1237         }
1238         mutex_unlock(&local->iflist_mtx);
1239         unregister_netdevice_many(&unreg_list);
1240         list_del(&unreg_list);
1241 }
1242
1243 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1244                               const char *reason)
1245 {
1246         if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1247                 return 0;
1248
1249 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1250         wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1251 #endif
1252
1253         local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1254         return IEEE80211_CONF_CHANGE_IDLE;
1255 }
1256
1257 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1258 {
1259         if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1260                 return 0;
1261
1262 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1263         wiphy_debug(local->hw.wiphy, "device now idle\n");
1264 #endif
1265
1266         drv_flush(local, false);
1267
1268         local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1269         return IEEE80211_CONF_CHANGE_IDLE;
1270 }
1271
1272 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1273 {
1274         struct ieee80211_sub_if_data *sdata;
1275         int count = 0;
1276         bool working = false, scanning = false, hw_roc = false;
1277         struct ieee80211_work *wk;
1278         unsigned int led_trig_start = 0, led_trig_stop = 0;
1279
1280 #ifdef CONFIG_PROVE_LOCKING
1281         WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1282                 !lockdep_is_held(&local->iflist_mtx));
1283 #endif
1284         lockdep_assert_held(&local->mtx);
1285
1286         list_for_each_entry(sdata, &local->interfaces, list) {
1287                 if (!ieee80211_sdata_running(sdata)) {
1288                         sdata->vif.bss_conf.idle = true;
1289                         continue;
1290                 }
1291
1292                 sdata->old_idle = sdata->vif.bss_conf.idle;
1293
1294                 /* do not count disabled managed interfaces */
1295                 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1296                     !sdata->u.mgd.associated) {
1297                         sdata->vif.bss_conf.idle = true;
1298                         continue;
1299                 }
1300                 /* do not count unused IBSS interfaces */
1301                 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1302                     !sdata->u.ibss.ssid_len) {
1303                         sdata->vif.bss_conf.idle = true;
1304                         continue;
1305                 }
1306                 /* count everything else */
1307                 count++;
1308         }
1309
1310         list_for_each_entry(wk, &local->work_list, list) {
1311                 working = true;
1312                 wk->sdata->vif.bss_conf.idle = false;
1313         }
1314
1315         if (local->scan_sdata) {
1316                 scanning = true;
1317                 local->scan_sdata->vif.bss_conf.idle = false;
1318         }
1319
1320         if (local->hw_roc_channel)
1321                 hw_roc = true;
1322
1323         list_for_each_entry(sdata, &local->interfaces, list) {
1324                 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1325                         continue;
1326                 if (!ieee80211_sdata_running(sdata))
1327                         continue;
1328                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1329         }
1330
1331         if (working || scanning || hw_roc)
1332                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1333         else
1334                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1335
1336         if (count)
1337                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1338         else
1339                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1340
1341         ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1342
1343         if (hw_roc)
1344                 return ieee80211_idle_off(local, "hw remain-on-channel");
1345         if (working)
1346                 return ieee80211_idle_off(local, "working");
1347         if (scanning)
1348                 return ieee80211_idle_off(local, "scanning");
1349         if (!count)
1350                 return ieee80211_idle_on(local);
1351         else
1352                 return ieee80211_idle_off(local, "in use");
1353
1354         return 0;
1355 }
1356
1357 void ieee80211_recalc_idle(struct ieee80211_local *local)
1358 {
1359         u32 chg;
1360
1361         mutex_lock(&local->iflist_mtx);
1362         chg = __ieee80211_recalc_idle(local);
1363         mutex_unlock(&local->iflist_mtx);
1364         if (chg)
1365                 ieee80211_hw_config(local, chg);
1366 }
1367
1368 static int netdev_notify(struct notifier_block *nb,
1369                          unsigned long state,
1370                          void *ndev)
1371 {
1372         struct net_device *dev = ndev;
1373         struct ieee80211_sub_if_data *sdata;
1374
1375         if (state != NETDEV_CHANGENAME)
1376                 return 0;
1377
1378         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1379                 return 0;
1380
1381         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1382                 return 0;
1383
1384         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1385
1386         memcpy(sdata->name, dev->name, IFNAMSIZ);
1387
1388         ieee80211_debugfs_rename_netdev(sdata);
1389         return 0;
1390 }
1391
1392 static struct notifier_block mac80211_netdev_notifier = {
1393         .notifier_call = netdev_notify,
1394 };
1395
1396 int ieee80211_iface_init(void)
1397 {
1398         return register_netdevice_notifier(&mac80211_netdev_notifier);
1399 }
1400
1401 void ieee80211_iface_exit(void)
1402 {
1403         unregister_netdevice_notifier(&mac80211_netdev_notifier);
1404 }