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Merge branch 'akpm'
[linux-2.6/next.git] / net / mac80211 / iface.c
blobd10dc4df60b6daaca6b327db18871438d9f9ed82
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_INIT_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_rx_mode = 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_rx_mode = 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 }
linux-next