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drm: Fix authentication kernel crash
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / iface.c
blob30d73552e9ab0f89ef53707e564dd67aee47a3b8
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 atomic bitop required since STA is not live yet */
303 set_sta_flag(sta, 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 /* down all dependent devices, that is VLANs */
464 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
465 u.vlan.list)
466 dev_close(vlan->dev);
467 WARN_ON(!list_empty(&sdata->u.ap.vlans));
468
469 /* free all potentially still buffered bcast frames */
470 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
471 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
472 }
473
474 if (going_down)
475 local->open_count--;
476
477 switch (sdata->vif.type) {
478 case NL80211_IFTYPE_AP_VLAN:
479 list_del(&sdata->u.vlan.list);
480 /* no need to tell driver */
481 break;
482 case NL80211_IFTYPE_MONITOR:
483 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
484 local->cooked_mntrs--;
485 break;
486 }
487
488 local->monitors--;
489 if (local->monitors == 0) {
490 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
491 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
492 }
493
494 ieee80211_adjust_monitor_flags(sdata, -1);
495 ieee80211_configure_filter(local);
496 break;
497 default:
498 flush_work(&sdata->work);
499 /*
500 * When we get here, the interface is marked down.
501 * Call synchronize_rcu() to wait for the RX path
502 * should it be using the interface and enqueuing
503 * frames at this very time on another CPU.
504 */
505 synchronize_rcu();
506 skb_queue_purge(&sdata->skb_queue);
507
508 /*
509 * Disable beaconing here for mesh only, AP and IBSS
510 * are already taken care of.
511 */
512 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
513 ieee80211_bss_info_change_notify(sdata,
514 BSS_CHANGED_BEACON_ENABLED);
515
516 /*
517 * Free all remaining keys, there shouldn't be any,
518 * except maybe group keys in AP more or WDS?
519 */
520 ieee80211_free_keys(sdata);
521
522 if (going_down)
523 drv_remove_interface(local, &sdata->vif);
524 }
525
526 sdata->bss = NULL;
527
528 mutex_lock(&local->mtx);
529 hw_reconf_flags |= __ieee80211_recalc_idle(local);
530 mutex_unlock(&local->mtx);
531
532 ieee80211_recalc_ps(local, -1);
533
534 if (local->open_count == 0) {
535 if (local->ops->napi_poll)
536 napi_disable(&local->napi);
537 ieee80211_clear_tx_pending(local);
538 ieee80211_stop_device(local);
539
540 /* no reconfiguring after stop! */
541 hw_reconf_flags = 0;
542 }
543
544 /* Re-calculate channel-type, in case there are multiple vifs
545 * on different channel types.
546 */
547 orig_ct = local->_oper_channel_type;
548 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
549
550 /* do after stop to avoid reconfiguring when we stop anyway */
551 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
552 ieee80211_hw_config(local, hw_reconf_flags);
553
554 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
555 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
556 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
557 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
558 if (info->control.vif == &sdata->vif) {
559 __skb_unlink(skb, &local->pending[i]);
560 dev_kfree_skb_irq(skb);
561 }
562 }
563 }
564 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
565 }
566
567 static int ieee80211_stop(struct net_device *dev)
568 {
569 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
570
571 ieee80211_do_stop(sdata, true);
572
573 return 0;
574 }
575
576 static void ieee80211_set_multicast_list(struct net_device *dev)
577 {
578 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
579 struct ieee80211_local *local = sdata->local;
580 int allmulti, promisc, sdata_allmulti, sdata_promisc;
581
582 allmulti = !!(dev->flags & IFF_ALLMULTI);
583 promisc = !!(dev->flags & IFF_PROMISC);
584 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
585 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
586
587 if (allmulti != sdata_allmulti) {
588 if (dev->flags & IFF_ALLMULTI)
589 atomic_inc(&local->iff_allmultis);
590 else
591 atomic_dec(&local->iff_allmultis);
592 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
593 }
594
595 if (promisc != sdata_promisc) {
596 if (dev->flags & IFF_PROMISC)
597 atomic_inc(&local->iff_promiscs);
598 else
599 atomic_dec(&local->iff_promiscs);
600 sdata->flags ^= IEEE80211_SDATA_PROMISC;
601 }
602 spin_lock_bh(&local->filter_lock);
603 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
604 spin_unlock_bh(&local->filter_lock);
605 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
606 }
607
608 /*
609 * Called when the netdev is removed or, by the code below, before
610 * the interface type changes.
611 */
612 static void ieee80211_teardown_sdata(struct net_device *dev)
613 {
614 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
615 struct ieee80211_local *local = sdata->local;
616 int flushed;
617 int i;
618
619 /* free extra data */
620 ieee80211_free_keys(sdata);
621
622 ieee80211_debugfs_remove_netdev(sdata);
623
624 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
625 __skb_queue_purge(&sdata->fragments[i].skb_list);
626 sdata->fragment_next = 0;
627
628 if (ieee80211_vif_is_mesh(&sdata->vif))
629 mesh_rmc_free(sdata);
630
631 flushed = sta_info_flush(local, sdata);
632 WARN_ON(flushed);
633 }
634
635 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
636 struct sk_buff *skb)
637 {
638 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
639 }
640
641 static const struct net_device_ops ieee80211_dataif_ops = {
642 .ndo_open = ieee80211_open,
643 .ndo_stop = ieee80211_stop,
644 .ndo_uninit = ieee80211_teardown_sdata,
645 .ndo_start_xmit = ieee80211_subif_start_xmit,
646 .ndo_set_rx_mode = ieee80211_set_multicast_list,
647 .ndo_change_mtu = ieee80211_change_mtu,
648 .ndo_set_mac_address = ieee80211_change_mac,
649 .ndo_select_queue = ieee80211_netdev_select_queue,
650 };
651
652 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
653 struct sk_buff *skb)
654 {
655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
656 struct ieee80211_local *local = sdata->local;
657 struct ieee80211_hdr *hdr;
658 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
659 u8 *p;
660
661 if (local->hw.queues < 4)
662 return 0;
663
664 if (skb->len < 4 ||
665 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
666 return 0; /* doesn't matter, frame will be dropped */
667
668 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
669
670 if (!ieee80211_is_data(hdr->frame_control)) {
671 skb->priority = 7;
672 return ieee802_1d_to_ac[skb->priority];
673 }
674 if (!ieee80211_is_data_qos(hdr->frame_control)) {
675 skb->priority = 0;
676 return ieee802_1d_to_ac[skb->priority];
677 }
678
679 p = ieee80211_get_qos_ctl(hdr);
680 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
681
682 return ieee80211_downgrade_queue(local, skb);
683 }
684
685 static const struct net_device_ops ieee80211_monitorif_ops = {
686 .ndo_open = ieee80211_open,
687 .ndo_stop = ieee80211_stop,
688 .ndo_uninit = ieee80211_teardown_sdata,
689 .ndo_start_xmit = ieee80211_monitor_start_xmit,
690 .ndo_set_rx_mode = ieee80211_set_multicast_list,
691 .ndo_change_mtu = ieee80211_change_mtu,
692 .ndo_set_mac_address = eth_mac_addr,
693 .ndo_select_queue = ieee80211_monitor_select_queue,
694 };
695
696 static void ieee80211_if_setup(struct net_device *dev)
697 {
698 ether_setup(dev);
699 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
700 dev->netdev_ops = &ieee80211_dataif_ops;
701 dev->destructor = free_netdev;
702 }
703
704 static void ieee80211_iface_work(struct work_struct *work)
705 {
706 struct ieee80211_sub_if_data *sdata =
707 container_of(work, struct ieee80211_sub_if_data, work);
708 struct ieee80211_local *local = sdata->local;
709 struct sk_buff *skb;
710 struct sta_info *sta;
711 struct ieee80211_ra_tid *ra_tid;
712
713 if (!ieee80211_sdata_running(sdata))
714 return;
715
716 if (local->scanning)
717 return;
718
719 /*
720 * ieee80211_queue_work() should have picked up most cases,
721 * here we'll pick the rest.
722 */
723 if (WARN(local->suspended,
724 "interface work scheduled while going to suspend\n"))
725 return;
726
727 /* first process frames */
728 while ((skb = skb_dequeue(&sdata->skb_queue))) {
729 struct ieee80211_mgmt *mgmt = (void *)skb->data;
730
731 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
732 ra_tid = (void *)&skb->cb;
733 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
734 ra_tid->tid);
735 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
736 ra_tid = (void *)&skb->cb;
737 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
738 ra_tid->tid);
739 } else if (ieee80211_is_action(mgmt->frame_control) &&
740 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
741 int len = skb->len;
742
743 mutex_lock(&local->sta_mtx);
744 sta = sta_info_get_bss(sdata, mgmt->sa);
745 if (sta) {
746 switch (mgmt->u.action.u.addba_req.action_code) {
747 case WLAN_ACTION_ADDBA_REQ:
748 ieee80211_process_addba_request(
749 local, sta, mgmt, len);
750 break;
751 case WLAN_ACTION_ADDBA_RESP:
752 ieee80211_process_addba_resp(local, sta,
753 mgmt, len);
754 break;
755 case WLAN_ACTION_DELBA:
756 ieee80211_process_delba(sdata, sta,
757 mgmt, len);
758 break;
759 default:
760 WARN_ON(1);
761 break;
762 }
763 }
764 mutex_unlock(&local->sta_mtx);
765 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
766 struct ieee80211_hdr *hdr = (void *)mgmt;
767 /*
768 * So the frame isn't mgmt, but frame_control
769 * is at the right place anyway, of course, so
770 * the if statement is correct.
771 *
772 * Warn if we have other data frame types here,
773 * they must not get here.
774 */
775 WARN_ON(hdr->frame_control &
776 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
777 WARN_ON(!(hdr->seq_ctrl &
778 cpu_to_le16(IEEE80211_SCTL_FRAG)));
779 /*
780 * This was a fragment of a frame, received while
781 * a block-ack session was active. That cannot be
782 * right, so terminate the session.
783 */
784 mutex_lock(&local->sta_mtx);
785 sta = sta_info_get_bss(sdata, mgmt->sa);
786 if (sta) {
787 u16 tid = *ieee80211_get_qos_ctl(hdr) &
788 IEEE80211_QOS_CTL_TID_MASK;
789
790 __ieee80211_stop_rx_ba_session(
791 sta, tid, WLAN_BACK_RECIPIENT,
792 WLAN_REASON_QSTA_REQUIRE_SETUP,
793 true);
794 }
795 mutex_unlock(&local->sta_mtx);
796 } else switch (sdata->vif.type) {
797 case NL80211_IFTYPE_STATION:
798 ieee80211_sta_rx_queued_mgmt(sdata, skb);
799 break;
800 case NL80211_IFTYPE_ADHOC:
801 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
802 break;
803 case NL80211_IFTYPE_MESH_POINT:
804 if (!ieee80211_vif_is_mesh(&sdata->vif))
805 break;
806 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
807 break;
808 default:
809 WARN(1, "frame for unexpected interface type");
810 break;
811 }
812
813 kfree_skb(skb);
814 }
815
816 /* then other type-dependent work */
817 switch (sdata->vif.type) {
818 case NL80211_IFTYPE_STATION:
819 ieee80211_sta_work(sdata);
820 break;
821 case NL80211_IFTYPE_ADHOC:
822 ieee80211_ibss_work(sdata);
823 break;
824 case NL80211_IFTYPE_MESH_POINT:
825 if (!ieee80211_vif_is_mesh(&sdata->vif))
826 break;
827 ieee80211_mesh_work(sdata);
828 break;
829 default:
830 break;
831 }
832 }
833
834
835 /*
836 * Helper function to initialise an interface to a specific type.
837 */
838 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
839 enum nl80211_iftype type)
840 {
841 /* clear type-dependent union */
842 memset(&sdata->u, 0, sizeof(sdata->u));
843
844 /* and set some type-dependent values */
845 sdata->vif.type = type;
846 sdata->vif.p2p = false;
847 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
848 sdata->wdev.iftype = type;
849
850 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
851 sdata->control_port_no_encrypt = false;
852
853 /* only monitor differs */
854 sdata->dev->type = ARPHRD_ETHER;
855
856 skb_queue_head_init(&sdata->skb_queue);
857 INIT_WORK(&sdata->work, ieee80211_iface_work);
858
859 switch (type) {
860 case NL80211_IFTYPE_P2P_GO:
861 type = NL80211_IFTYPE_AP;
862 sdata->vif.type = type;
863 sdata->vif.p2p = true;
864 /* fall through */
865 case NL80211_IFTYPE_AP:
866 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
867 INIT_LIST_HEAD(&sdata->u.ap.vlans);
868 break;
869 case NL80211_IFTYPE_P2P_CLIENT:
870 type = NL80211_IFTYPE_STATION;
871 sdata->vif.type = type;
872 sdata->vif.p2p = true;
873 /* fall through */
874 case NL80211_IFTYPE_STATION:
875 ieee80211_sta_setup_sdata(sdata);
876 break;
877 case NL80211_IFTYPE_ADHOC:
878 ieee80211_ibss_setup_sdata(sdata);
879 break;
880 case NL80211_IFTYPE_MESH_POINT:
881 if (ieee80211_vif_is_mesh(&sdata->vif))
882 ieee80211_mesh_init_sdata(sdata);
883 break;
884 case NL80211_IFTYPE_MONITOR:
885 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
886 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
887 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
888 MONITOR_FLAG_OTHER_BSS;
889 break;
890 case NL80211_IFTYPE_WDS:
891 case NL80211_IFTYPE_AP_VLAN:
892 break;
893 case NL80211_IFTYPE_UNSPECIFIED:
894 case NUM_NL80211_IFTYPES:
895 BUG();
896 break;
897 }
898
899 ieee80211_debugfs_add_netdev(sdata);
900 }
901
902 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
903 enum nl80211_iftype type)
904 {
905 struct ieee80211_local *local = sdata->local;
906 int ret, err;
907 enum nl80211_iftype internal_type = type;
908 bool p2p = false;
909
910 ASSERT_RTNL();
911
912 if (!local->ops->change_interface)
913 return -EBUSY;
914
915 switch (sdata->vif.type) {
916 case NL80211_IFTYPE_AP:
917 case NL80211_IFTYPE_STATION:
918 case NL80211_IFTYPE_ADHOC:
919 /*
920 * Could maybe also all others here?
921 * Just not sure how that interacts
922 * with the RX/config path e.g. for
923 * mesh.
924 */
925 break;
926 default:
927 return -EBUSY;
928 }
929
930 switch (type) {
931 case NL80211_IFTYPE_AP:
932 case NL80211_IFTYPE_STATION:
933 case NL80211_IFTYPE_ADHOC:
934 /*
935 * Could probably support everything
936 * but WDS here (WDS do_open can fail
937 * under memory pressure, which this
938 * code isn't prepared to handle).
939 */
940 break;
941 case NL80211_IFTYPE_P2P_CLIENT:
942 p2p = true;
943 internal_type = NL80211_IFTYPE_STATION;
944 break;
945 case NL80211_IFTYPE_P2P_GO:
946 p2p = true;
947 internal_type = NL80211_IFTYPE_AP;
948 break;
949 default:
950 return -EBUSY;
951 }
952
953 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
954 if (ret)
955 return ret;
956
957 ieee80211_do_stop(sdata, false);
958
959 ieee80211_teardown_sdata(sdata->dev);
960
961 ret = drv_change_interface(local, sdata, internal_type, p2p);
962 if (ret)
963 type = sdata->vif.type;
964
965 ieee80211_setup_sdata(sdata, type);
966
967 err = ieee80211_do_open(sdata->dev, false);
968 WARN(err, "type change: do_open returned %d", err);
969
970 return ret;
971 }
972
973 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
974 enum nl80211_iftype type)
975 {
976 int ret;
977
978 ASSERT_RTNL();
979
980 if (type == ieee80211_vif_type_p2p(&sdata->vif))
981 return 0;
982
983 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
984 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
985 type == NL80211_IFTYPE_ADHOC)
986 return -EOPNOTSUPP;
987
988 if (ieee80211_sdata_running(sdata)) {
989 ret = ieee80211_runtime_change_iftype(sdata, type);
990 if (ret)
991 return ret;
992 } else {
993 /* Purge and reset type-dependent state. */
994 ieee80211_teardown_sdata(sdata->dev);
995 ieee80211_setup_sdata(sdata, type);
996 }
997
998 /* reset some values that shouldn't be kept across type changes */
999 sdata->vif.bss_conf.basic_rates =
1000 ieee80211_mandatory_rates(sdata->local,
1001 sdata->local->hw.conf.channel->band);
1002 sdata->drop_unencrypted = 0;
1003 if (type == NL80211_IFTYPE_STATION)
1004 sdata->u.mgd.use_4addr = false;
1005
1006 return 0;
1007 }
1008
1009 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1010 struct net_device *dev,
1011 enum nl80211_iftype type)
1012 {
1013 struct ieee80211_sub_if_data *sdata;
1014 u64 mask, start, addr, val, inc;
1015 u8 *m;
1016 u8 tmp_addr[ETH_ALEN];
1017 int i;
1018
1019 /* default ... something at least */
1020 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1021
1022 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1023 local->hw.wiphy->n_addresses <= 1)
1024 return;
1025
1026
1027 mutex_lock(&local->iflist_mtx);
1028
1029 switch (type) {
1030 case NL80211_IFTYPE_MONITOR:
1031 /* doesn't matter */
1032 break;
1033 case NL80211_IFTYPE_WDS:
1034 case NL80211_IFTYPE_AP_VLAN:
1035 /* match up with an AP interface */
1036 list_for_each_entry(sdata, &local->interfaces, list) {
1037 if (sdata->vif.type != NL80211_IFTYPE_AP)
1038 continue;
1039 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1040 break;
1041 }
1042 /* keep default if no AP interface present */
1043 break;
1044 default:
1045 /* assign a new address if possible -- try n_addresses first */
1046 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1047 bool used = false;
1048
1049 list_for_each_entry(sdata, &local->interfaces, list) {
1050 if (memcmp(local->hw.wiphy->addresses[i].addr,
1051 sdata->vif.addr, ETH_ALEN) == 0) {
1052 used = true;
1053 break;
1054 }
1055 }
1056
1057 if (!used) {
1058 memcpy(dev->perm_addr,
1059 local->hw.wiphy->addresses[i].addr,
1060 ETH_ALEN);
1061 break;
1062 }
1063 }
1064
1065 /* try mask if available */
1066 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1067 break;
1068
1069 m = local->hw.wiphy->addr_mask;
1070 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1071 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1072 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1073
1074 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1075 /* not a contiguous mask ... not handled now! */
1076 printk(KERN_DEBUG "not contiguous\n");
1077 break;
1078 }
1079
1080 m = local->hw.wiphy->perm_addr;
1081 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1082 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1083 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1084
1085 inc = 1ULL<<__ffs64(mask);
1086 val = (start & mask);
1087 addr = (start & ~mask) | (val & mask);
1088 do {
1089 bool used = false;
1090
1091 tmp_addr[5] = addr >> 0*8;
1092 tmp_addr[4] = addr >> 1*8;
1093 tmp_addr[3] = addr >> 2*8;
1094 tmp_addr[2] = addr >> 3*8;
1095 tmp_addr[1] = addr >> 4*8;
1096 tmp_addr[0] = addr >> 5*8;
1097
1098 val += inc;
1099
1100 list_for_each_entry(sdata, &local->interfaces, list) {
1101 if (memcmp(tmp_addr, sdata->vif.addr,
1102 ETH_ALEN) == 0) {
1103 used = true;
1104 break;
1105 }
1106 }
1107
1108 if (!used) {
1109 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1110 break;
1111 }
1112 addr = (start & ~mask) | (val & mask);
1113 } while (addr != start);
1114
1115 break;
1116 }
1117
1118 mutex_unlock(&local->iflist_mtx);
1119 }
1120
1121 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1122 struct net_device **new_dev, enum nl80211_iftype type,
1123 struct vif_params *params)
1124 {
1125 struct net_device *ndev;
1126 struct ieee80211_sub_if_data *sdata = NULL;
1127 int ret, i;
1128
1129 ASSERT_RTNL();
1130
1131 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1132 name, ieee80211_if_setup, local->hw.queues, 1);
1133 if (!ndev)
1134 return -ENOMEM;
1135 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1136
1137 ndev->needed_headroom = local->tx_headroom +
1138 4*6 /* four MAC addresses */
1139 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1140 + 6 /* mesh */
1141 + 8 /* rfc1042/bridge tunnel */
1142 - ETH_HLEN /* ethernet hard_header_len */
1143 + IEEE80211_ENCRYPT_HEADROOM;
1144 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1145
1146 ret = dev_alloc_name(ndev, ndev->name);
1147 if (ret < 0)
1148 goto fail;
1149
1150 ieee80211_assign_perm_addr(local, ndev, type);
1151 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1152 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1153
1154 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1155 sdata = netdev_priv(ndev);
1156 ndev->ieee80211_ptr = &sdata->wdev;
1157 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1158 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1159
1160 /* initialise type-independent data */
1161 sdata->wdev.wiphy = local->hw.wiphy;
1162 sdata->local = local;
1163 sdata->dev = ndev;
1164 #ifdef CONFIG_INET
1165 sdata->arp_filter_state = true;
1166 #endif
1167
1168 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1169 skb_queue_head_init(&sdata->fragments[i].skb_list);
1170
1171 INIT_LIST_HEAD(&sdata->key_list);
1172
1173 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1174 struct ieee80211_supported_band *sband;
1175 sband = local->hw.wiphy->bands[i];
1176 sdata->rc_rateidx_mask[i] =
1177 sband ? (1 << sband->n_bitrates) - 1 : 0;
1178 }
1179
1180 /* setup type-dependent data */
1181 ieee80211_setup_sdata(sdata, type);
1182
1183 if (params) {
1184 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1185 if (type == NL80211_IFTYPE_STATION)
1186 sdata->u.mgd.use_4addr = params->use_4addr;
1187 }
1188
1189 ret = register_netdevice(ndev);
1190 if (ret)
1191 goto fail;
1192
1193 mutex_lock(&local->iflist_mtx);
1194 list_add_tail_rcu(&sdata->list, &local->interfaces);
1195 mutex_unlock(&local->iflist_mtx);
1196
1197 if (new_dev)
1198 *new_dev = ndev;
1199
1200 return 0;
1201
1202 fail:
1203 free_netdev(ndev);
1204 return ret;
1205 }
1206
1207 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1208 {
1209 ASSERT_RTNL();
1210
1211 mutex_lock(&sdata->local->iflist_mtx);
1212 list_del_rcu(&sdata->list);
1213 mutex_unlock(&sdata->local->iflist_mtx);
1214
1215 if (ieee80211_vif_is_mesh(&sdata->vif))
1216 mesh_path_flush_by_iface(sdata);
1217
1218 synchronize_rcu();
1219 unregister_netdevice(sdata->dev);
1220 }
1221
1222 /*
1223 * Remove all interfaces, may only be called at hardware unregistration
1224 * time because it doesn't do RCU-safe list removals.
1225 */
1226 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1227 {
1228 struct ieee80211_sub_if_data *sdata, *tmp;
1229 LIST_HEAD(unreg_list);
1230
1231 ASSERT_RTNL();
1232
1233 mutex_lock(&local->iflist_mtx);
1234 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1235 list_del(&sdata->list);
1236
1237 if (ieee80211_vif_is_mesh(&sdata->vif))
1238 mesh_path_flush_by_iface(sdata);
1239
1240 unregister_netdevice_queue(sdata->dev, &unreg_list);
1241 }
1242 mutex_unlock(&local->iflist_mtx);
1243 unregister_netdevice_many(&unreg_list);
1244 list_del(&unreg_list);
1245 }
1246
1247 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1248 const char *reason)
1249 {
1250 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1251 return 0;
1252
1253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1254 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1255 #endif
1256
1257 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1258 return IEEE80211_CONF_CHANGE_IDLE;
1259 }
1260
1261 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1262 {
1263 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1264 return 0;
1265
1266 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1267 wiphy_debug(local->hw.wiphy, "device now idle\n");
1268 #endif
1269
1270 drv_flush(local, false);
1271
1272 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1273 return IEEE80211_CONF_CHANGE_IDLE;
1274 }
1275
1276 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1277 {
1278 struct ieee80211_sub_if_data *sdata;
1279 int count = 0;
1280 bool working = false, scanning = false, hw_roc = false;
1281 struct ieee80211_work *wk;
1282 unsigned int led_trig_start = 0, led_trig_stop = 0;
1283
1284 #ifdef CONFIG_PROVE_LOCKING
1285 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1286 !lockdep_is_held(&local->iflist_mtx));
1287 #endif
1288 lockdep_assert_held(&local->mtx);
1289
1290 list_for_each_entry(sdata, &local->interfaces, list) {
1291 if (!ieee80211_sdata_running(sdata)) {
1292 sdata->vif.bss_conf.idle = true;
1293 continue;
1294 }
1295
1296 sdata->old_idle = sdata->vif.bss_conf.idle;
1297
1298 /* do not count disabled managed interfaces */
1299 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1300 !sdata->u.mgd.associated) {
1301 sdata->vif.bss_conf.idle = true;
1302 continue;
1303 }
1304 /* do not count unused IBSS interfaces */
1305 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1306 !sdata->u.ibss.ssid_len) {
1307 sdata->vif.bss_conf.idle = true;
1308 continue;
1309 }
1310 /* count everything else */
1311 count++;
1312 }
1313
1314 list_for_each_entry(wk, &local->work_list, list) {
1315 working = true;
1316 wk->sdata->vif.bss_conf.idle = false;
1317 }
1318
1319 if (local->scan_sdata) {
1320 scanning = true;
1321 local->scan_sdata->vif.bss_conf.idle = false;
1322 }
1323
1324 if (local->hw_roc_channel)
1325 hw_roc = true;
1326
1327 list_for_each_entry(sdata, &local->interfaces, list) {
1328 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1329 continue;
1330 if (!ieee80211_sdata_running(sdata))
1331 continue;
1332 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1333 }
1334
1335 if (working || scanning || hw_roc)
1336 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1337 else
1338 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1339
1340 if (count)
1341 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1342 else
1343 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1344
1345 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1346
1347 if (hw_roc)
1348 return ieee80211_idle_off(local, "hw remain-on-channel");
1349 if (working)
1350 return ieee80211_idle_off(local, "working");
1351 if (scanning)
1352 return ieee80211_idle_off(local, "scanning");
1353 if (!count)
1354 return ieee80211_idle_on(local);
1355 else
1356 return ieee80211_idle_off(local, "in use");
1357
1358 return 0;
1359 }
1360
1361 void ieee80211_recalc_idle(struct ieee80211_local *local)
1362 {
1363 u32 chg;
1364
1365 mutex_lock(&local->iflist_mtx);
1366 chg = __ieee80211_recalc_idle(local);
1367 mutex_unlock(&local->iflist_mtx);
1368 if (chg)
1369 ieee80211_hw_config(local, chg);
1370 }
1371
1372 static int netdev_notify(struct notifier_block *nb,
1373 unsigned long state,
1374 void *ndev)
1375 {
1376 struct net_device *dev = ndev;
1377 struct ieee80211_sub_if_data *sdata;
1378
1379 if (state != NETDEV_CHANGENAME)
1380 return 0;
1381
1382 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1383 return 0;
1384
1385 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1386 return 0;
1387
1388 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1389
1390 memcpy(sdata->name, dev->name, IFNAMSIZ);
1391
1392 ieee80211_debugfs_rename_netdev(sdata);
1393 return 0;
1394 }
1395
1396 static struct notifier_block mac80211_netdev_notifier = {
1397 .notifier_call = netdev_notify,
1398 };
1399
1400 int ieee80211_iface_init(void)
1401 {
1402 return register_netdevice_notifier(&mac80211_netdev_notifier);
1403 }
1404
1405 void ieee80211_iface_exit(void)
1406 {
1407 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1408 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree