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Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / iface.c
blob8acba456744ea06cb91fe887cf4a4060a8c15e7d
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_zero_ether_addr(dev->dev_addr) &&
367 !is_valid_ether_addr(dev->dev_addr))
368 return -EADDRNOTAVAIL;
369
370 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
371 if (err)
372 return err;
373
374 return ieee80211_do_open(dev, true);
375 }
376
377 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
378 bool going_down)
379 {
380 struct ieee80211_local *local = sdata->local;
381 unsigned long flags;
382 struct sk_buff *skb, *tmp;
383 u32 hw_reconf_flags = 0;
384 int i;
385
386 if (local->scan_sdata == sdata)
387 ieee80211_scan_cancel(local);
388
389 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
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 = sdata->u.ap.beacon;
452
453 /* sdata_running will return false, so this will disable */
454 ieee80211_bss_info_change_notify(sdata,
455 BSS_CHANGED_BEACON_ENABLED);
456
457 /* remove beacon */
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
459 synchronize_rcu();
460 kfree(old_beacon);
461
462 /* free all potentially still buffered bcast frames */
463 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
464 local->total_ps_buffered--;
465 dev_kfree_skb(skb);
466 }
467
468 /* down all dependent devices, that is VLANs */
469 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
470 u.vlan.list)
471 dev_close(vlan->dev);
472 WARN_ON(!list_empty(&sdata->u.ap.vlans));
473 }
474
475 if (going_down)
476 local->open_count--;
477
478 switch (sdata->vif.type) {
479 case NL80211_IFTYPE_AP_VLAN:
480 list_del(&sdata->u.vlan.list);
481 /* no need to tell driver */
482 break;
483 case NL80211_IFTYPE_MONITOR:
484 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
485 local->cooked_mntrs--;
486 break;
487 }
488
489 local->monitors--;
490 if (local->monitors == 0) {
491 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
492 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
493 }
494
495 ieee80211_adjust_monitor_flags(sdata, -1);
496 ieee80211_configure_filter(local);
497 break;
498 default:
499 flush_work(&sdata->work);
500 /*
501 * When we get here, the interface is marked down.
502 * Call synchronize_rcu() to wait for the RX path
503 * should it be using the interface and enqueuing
504 * frames at this very time on another CPU.
505 */
506 synchronize_rcu();
507 skb_queue_purge(&sdata->skb_queue);
508
509 /*
510 * Disable beaconing here for mesh only, AP and IBSS
511 * are already taken care of.
512 */
513 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
514 ieee80211_bss_info_change_notify(sdata,
515 BSS_CHANGED_BEACON_ENABLED);
516
517 /*
518 * Free all remaining keys, there shouldn't be any,
519 * except maybe group keys in AP more or WDS?
520 */
521 ieee80211_free_keys(sdata);
522
523 if (going_down)
524 drv_remove_interface(local, &sdata->vif);
525 }
526
527 sdata->bss = NULL;
528
529 mutex_lock(&local->mtx);
530 hw_reconf_flags |= __ieee80211_recalc_idle(local);
531 mutex_unlock(&local->mtx);
532
533 ieee80211_recalc_ps(local, -1);
534
535 if (local->open_count == 0) {
536 if (local->ops->napi_poll)
537 napi_disable(&local->napi);
538 ieee80211_clear_tx_pending(local);
539 ieee80211_stop_device(local);
540
541 /* no reconfiguring after stop! */
542 hw_reconf_flags = 0;
543 }
544
545 /* do after stop to avoid reconfiguring when we stop anyway */
546 if (hw_reconf_flags)
547 ieee80211_hw_config(local, hw_reconf_flags);
548
549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
550 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
551 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553 if (info->control.vif == &sdata->vif) {
554 __skb_unlink(skb, &local->pending[i]);
555 dev_kfree_skb_irq(skb);
556 }
557 }
558 }
559 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
560 }
561
562 static int ieee80211_stop(struct net_device *dev)
563 {
564 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
565
566 ieee80211_do_stop(sdata, true);
567
568 return 0;
569 }
570
571 static void ieee80211_set_multicast_list(struct net_device *dev)
572 {
573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
574 struct ieee80211_local *local = sdata->local;
575 int allmulti, promisc, sdata_allmulti, sdata_promisc;
576
577 allmulti = !!(dev->flags & IFF_ALLMULTI);
578 promisc = !!(dev->flags & IFF_PROMISC);
579 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
580 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
581
582 if (allmulti != sdata_allmulti) {
583 if (dev->flags & IFF_ALLMULTI)
584 atomic_inc(&local->iff_allmultis);
585 else
586 atomic_dec(&local->iff_allmultis);
587 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
588 }
589
590 if (promisc != sdata_promisc) {
591 if (dev->flags & IFF_PROMISC)
592 atomic_inc(&local->iff_promiscs);
593 else
594 atomic_dec(&local->iff_promiscs);
595 sdata->flags ^= IEEE80211_SDATA_PROMISC;
596 }
597 spin_lock_bh(&local->filter_lock);
598 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
599 spin_unlock_bh(&local->filter_lock);
600 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
601 }
602
603 /*
604 * Called when the netdev is removed or, by the code below, before
605 * the interface type changes.
606 */
607 static void ieee80211_teardown_sdata(struct net_device *dev)
608 {
609 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
610 struct ieee80211_local *local = sdata->local;
611 int flushed;
612 int i;
613
614 /* free extra data */
615 ieee80211_free_keys(sdata);
616
617 ieee80211_debugfs_remove_netdev(sdata);
618
619 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
620 __skb_queue_purge(&sdata->fragments[i].skb_list);
621 sdata->fragment_next = 0;
622
623 if (ieee80211_vif_is_mesh(&sdata->vif))
624 mesh_rmc_free(sdata);
625
626 flushed = sta_info_flush(local, sdata);
627 WARN_ON(flushed);
628 }
629
630 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
631 struct sk_buff *skb)
632 {
633 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
634 }
635
636 static const struct net_device_ops ieee80211_dataif_ops = {
637 .ndo_open = ieee80211_open,
638 .ndo_stop = ieee80211_stop,
639 .ndo_uninit = ieee80211_teardown_sdata,
640 .ndo_start_xmit = ieee80211_subif_start_xmit,
641 .ndo_set_multicast_list = ieee80211_set_multicast_list,
642 .ndo_change_mtu = ieee80211_change_mtu,
643 .ndo_set_mac_address = ieee80211_change_mac,
644 .ndo_select_queue = ieee80211_netdev_select_queue,
645 };
646
647 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
648 struct sk_buff *skb)
649 {
650 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
651 struct ieee80211_local *local = sdata->local;
652 struct ieee80211_hdr *hdr;
653 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
654 u8 *p;
655
656 if (local->hw.queues < 4)
657 return 0;
658
659 if (skb->len < 4 ||
660 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
661 return 0; /* doesn't matter, frame will be dropped */
662
663 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
664
665 if (!ieee80211_is_data(hdr->frame_control)) {
666 skb->priority = 7;
667 return ieee802_1d_to_ac[skb->priority];
668 }
669 if (!ieee80211_is_data_qos(hdr->frame_control)) {
670 skb->priority = 0;
671 return ieee802_1d_to_ac[skb->priority];
672 }
673
674 p = ieee80211_get_qos_ctl(hdr);
675 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
676
677 return ieee80211_downgrade_queue(local, skb);
678 }
679
680 static const struct net_device_ops ieee80211_monitorif_ops = {
681 .ndo_open = ieee80211_open,
682 .ndo_stop = ieee80211_stop,
683 .ndo_uninit = ieee80211_teardown_sdata,
684 .ndo_start_xmit = ieee80211_monitor_start_xmit,
685 .ndo_set_multicast_list = ieee80211_set_multicast_list,
686 .ndo_change_mtu = ieee80211_change_mtu,
687 .ndo_set_mac_address = eth_mac_addr,
688 .ndo_select_queue = ieee80211_monitor_select_queue,
689 };
690
691 static void ieee80211_if_setup(struct net_device *dev)
692 {
693 ether_setup(dev);
694 dev->netdev_ops = &ieee80211_dataif_ops;
695 dev->destructor = free_netdev;
696 }
697
698 static void ieee80211_iface_work(struct work_struct *work)
699 {
700 struct ieee80211_sub_if_data *sdata =
701 container_of(work, struct ieee80211_sub_if_data, work);
702 struct ieee80211_local *local = sdata->local;
703 struct sk_buff *skb;
704 struct sta_info *sta;
705 struct ieee80211_ra_tid *ra_tid;
706
707 if (!ieee80211_sdata_running(sdata))
708 return;
709
710 if (local->scanning)
711 return;
712
713 /*
714 * ieee80211_queue_work() should have picked up most cases,
715 * here we'll pick the rest.
716 */
717 if (WARN(local->suspended,
718 "interface work scheduled while going to suspend\n"))
719 return;
720
721 /* first process frames */
722 while ((skb = skb_dequeue(&sdata->skb_queue))) {
723 struct ieee80211_mgmt *mgmt = (void *)skb->data;
724
725 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
726 ra_tid = (void *)&skb->cb;
727 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
728 ra_tid->tid);
729 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
730 ra_tid = (void *)&skb->cb;
731 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
732 ra_tid->tid);
733 } else if (ieee80211_is_action(mgmt->frame_control) &&
734 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
735 int len = skb->len;
736
737 mutex_lock(&local->sta_mtx);
738 sta = sta_info_get_bss(sdata, mgmt->sa);
739 if (sta) {
740 switch (mgmt->u.action.u.addba_req.action_code) {
741 case WLAN_ACTION_ADDBA_REQ:
742 ieee80211_process_addba_request(
743 local, sta, mgmt, len);
744 break;
745 case WLAN_ACTION_ADDBA_RESP:
746 ieee80211_process_addba_resp(local, sta,
747 mgmt, len);
748 break;
749 case WLAN_ACTION_DELBA:
750 ieee80211_process_delba(sdata, sta,
751 mgmt, len);
752 break;
753 default:
754 WARN_ON(1);
755 break;
756 }
757 }
758 mutex_unlock(&local->sta_mtx);
759 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
760 struct ieee80211_hdr *hdr = (void *)mgmt;
761 /*
762 * So the frame isn't mgmt, but frame_control
763 * is at the right place anyway, of course, so
764 * the if statement is correct.
765 *
766 * Warn if we have other data frame types here,
767 * they must not get here.
768 */
769 WARN_ON(hdr->frame_control &
770 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
771 WARN_ON(!(hdr->seq_ctrl &
772 cpu_to_le16(IEEE80211_SCTL_FRAG)));
773 /*
774 * This was a fragment of a frame, received while
775 * a block-ack session was active. That cannot be
776 * right, so terminate the session.
777 */
778 mutex_lock(&local->sta_mtx);
779 sta = sta_info_get_bss(sdata, mgmt->sa);
780 if (sta) {
781 u16 tid = *ieee80211_get_qos_ctl(hdr) &
782 IEEE80211_QOS_CTL_TID_MASK;
783
784 __ieee80211_stop_rx_ba_session(
785 sta, tid, WLAN_BACK_RECIPIENT,
786 WLAN_REASON_QSTA_REQUIRE_SETUP,
787 true);
788 }
789 mutex_unlock(&local->sta_mtx);
790 } else switch (sdata->vif.type) {
791 case NL80211_IFTYPE_STATION:
792 ieee80211_sta_rx_queued_mgmt(sdata, skb);
793 break;
794 case NL80211_IFTYPE_ADHOC:
795 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
796 break;
797 case NL80211_IFTYPE_MESH_POINT:
798 if (!ieee80211_vif_is_mesh(&sdata->vif))
799 break;
800 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
801 break;
802 default:
803 WARN(1, "frame for unexpected interface type");
804 break;
805 }
806
807 kfree_skb(skb);
808 }
809
810 /* then other type-dependent work */
811 switch (sdata->vif.type) {
812 case NL80211_IFTYPE_STATION:
813 ieee80211_sta_work(sdata);
814 break;
815 case NL80211_IFTYPE_ADHOC:
816 ieee80211_ibss_work(sdata);
817 break;
818 case NL80211_IFTYPE_MESH_POINT:
819 if (!ieee80211_vif_is_mesh(&sdata->vif))
820 break;
821 ieee80211_mesh_work(sdata);
822 break;
823 default:
824 break;
825 }
826 }
827
828
829 /*
830 * Helper function to initialise an interface to a specific type.
831 */
832 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
833 enum nl80211_iftype type)
834 {
835 /* clear type-dependent union */
836 memset(&sdata->u, 0, sizeof(sdata->u));
837
838 /* and set some type-dependent values */
839 sdata->vif.type = type;
840 sdata->vif.p2p = false;
841 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
842 sdata->wdev.iftype = type;
843
844 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
845 sdata->control_port_no_encrypt = false;
846
847 /* only monitor differs */
848 sdata->dev->type = ARPHRD_ETHER;
849
850 skb_queue_head_init(&sdata->skb_queue);
851 INIT_WORK(&sdata->work, ieee80211_iface_work);
852
853 switch (type) {
854 case NL80211_IFTYPE_P2P_GO:
855 type = NL80211_IFTYPE_AP;
856 sdata->vif.type = type;
857 sdata->vif.p2p = true;
858 /* fall through */
859 case NL80211_IFTYPE_AP:
860 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
861 INIT_LIST_HEAD(&sdata->u.ap.vlans);
862 break;
863 case NL80211_IFTYPE_P2P_CLIENT:
864 type = NL80211_IFTYPE_STATION;
865 sdata->vif.type = type;
866 sdata->vif.p2p = true;
867 /* fall through */
868 case NL80211_IFTYPE_STATION:
869 ieee80211_sta_setup_sdata(sdata);
870 break;
871 case NL80211_IFTYPE_ADHOC:
872 ieee80211_ibss_setup_sdata(sdata);
873 break;
874 case NL80211_IFTYPE_MESH_POINT:
875 if (ieee80211_vif_is_mesh(&sdata->vif))
876 ieee80211_mesh_init_sdata(sdata);
877 break;
878 case NL80211_IFTYPE_MONITOR:
879 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
880 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
881 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
882 MONITOR_FLAG_OTHER_BSS;
883 break;
884 case NL80211_IFTYPE_WDS:
885 case NL80211_IFTYPE_AP_VLAN:
886 break;
887 case NL80211_IFTYPE_UNSPECIFIED:
888 case NUM_NL80211_IFTYPES:
889 BUG();
890 break;
891 }
892
893 ieee80211_debugfs_add_netdev(sdata);
894 }
895
896 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
897 enum nl80211_iftype type)
898 {
899 struct ieee80211_local *local = sdata->local;
900 int ret, err;
901 enum nl80211_iftype internal_type = type;
902 bool p2p = false;
903
904 ASSERT_RTNL();
905
906 if (!local->ops->change_interface)
907 return -EBUSY;
908
909 switch (sdata->vif.type) {
910 case NL80211_IFTYPE_AP:
911 case NL80211_IFTYPE_STATION:
912 case NL80211_IFTYPE_ADHOC:
913 /*
914 * Could maybe also all others here?
915 * Just not sure how that interacts
916 * with the RX/config path e.g. for
917 * mesh.
918 */
919 break;
920 default:
921 return -EBUSY;
922 }
923
924 switch (type) {
925 case NL80211_IFTYPE_AP:
926 case NL80211_IFTYPE_STATION:
927 case NL80211_IFTYPE_ADHOC:
928 /*
929 * Could probably support everything
930 * but WDS here (WDS do_open can fail
931 * under memory pressure, which this
932 * code isn't prepared to handle).
933 */
934 break;
935 case NL80211_IFTYPE_P2P_CLIENT:
936 p2p = true;
937 internal_type = NL80211_IFTYPE_STATION;
938 break;
939 case NL80211_IFTYPE_P2P_GO:
940 p2p = true;
941 internal_type = NL80211_IFTYPE_AP;
942 break;
943 default:
944 return -EBUSY;
945 }
946
947 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
948 if (ret)
949 return ret;
950
951 ieee80211_do_stop(sdata, false);
952
953 ieee80211_teardown_sdata(sdata->dev);
954
955 ret = drv_change_interface(local, sdata, internal_type, p2p);
956 if (ret)
957 type = sdata->vif.type;
958
959 ieee80211_setup_sdata(sdata, type);
960
961 err = ieee80211_do_open(sdata->dev, false);
962 WARN(err, "type change: do_open returned %d", err);
963
964 return ret;
965 }
966
967 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
968 enum nl80211_iftype type)
969 {
970 int ret;
971
972 ASSERT_RTNL();
973
974 if (type == ieee80211_vif_type_p2p(&sdata->vif))
975 return 0;
976
977 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
978 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
979 type == NL80211_IFTYPE_ADHOC)
980 return -EOPNOTSUPP;
981
982 if (ieee80211_sdata_running(sdata)) {
983 ret = ieee80211_runtime_change_iftype(sdata, type);
984 if (ret)
985 return ret;
986 } else {
987 /* Purge and reset type-dependent state. */
988 ieee80211_teardown_sdata(sdata->dev);
989 ieee80211_setup_sdata(sdata, type);
990 }
991
992 /* reset some values that shouldn't be kept across type changes */
993 sdata->vif.bss_conf.basic_rates =
994 ieee80211_mandatory_rates(sdata->local,
995 sdata->local->hw.conf.channel->band);
996 sdata->drop_unencrypted = 0;
997 if (type == NL80211_IFTYPE_STATION)
998 sdata->u.mgd.use_4addr = false;
999
1000 return 0;
1001 }
1002
1003 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1004 struct net_device *dev,
1005 enum nl80211_iftype type)
1006 {
1007 struct ieee80211_sub_if_data *sdata;
1008 u64 mask, start, addr, val, inc;
1009 u8 *m;
1010 u8 tmp_addr[ETH_ALEN];
1011 int i;
1012
1013 /* default ... something at least */
1014 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1015
1016 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1017 local->hw.wiphy->n_addresses <= 1)
1018 return;
1019
1020
1021 mutex_lock(&local->iflist_mtx);
1022
1023 switch (type) {
1024 case NL80211_IFTYPE_MONITOR:
1025 /* doesn't matter */
1026 break;
1027 case NL80211_IFTYPE_WDS:
1028 case NL80211_IFTYPE_AP_VLAN:
1029 /* match up with an AP interface */
1030 list_for_each_entry(sdata, &local->interfaces, list) {
1031 if (sdata->vif.type != NL80211_IFTYPE_AP)
1032 continue;
1033 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1034 break;
1035 }
1036 /* keep default if no AP interface present */
1037 break;
1038 default:
1039 /* assign a new address if possible -- try n_addresses first */
1040 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1041 bool used = false;
1042
1043 list_for_each_entry(sdata, &local->interfaces, list) {
1044 if (memcmp(local->hw.wiphy->addresses[i].addr,
1045 sdata->vif.addr, ETH_ALEN) == 0) {
1046 used = true;
1047 break;
1048 }
1049 }
1050
1051 if (!used) {
1052 memcpy(dev->perm_addr,
1053 local->hw.wiphy->addresses[i].addr,
1054 ETH_ALEN);
1055 break;
1056 }
1057 }
1058
1059 /* try mask if available */
1060 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1061 break;
1062
1063 m = local->hw.wiphy->addr_mask;
1064 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1065 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1066 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1067
1068 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1069 /* not a contiguous mask ... not handled now! */
1070 printk(KERN_DEBUG "not contiguous\n");
1071 break;
1072 }
1073
1074 m = local->hw.wiphy->perm_addr;
1075 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1076 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1077 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1078
1079 inc = 1ULL<<__ffs64(mask);
1080 val = (start & mask);
1081 addr = (start & ~mask) | (val & mask);
1082 do {
1083 bool used = false;
1084
1085 tmp_addr[5] = addr >> 0*8;
1086 tmp_addr[4] = addr >> 1*8;
1087 tmp_addr[3] = addr >> 2*8;
1088 tmp_addr[2] = addr >> 3*8;
1089 tmp_addr[1] = addr >> 4*8;
1090 tmp_addr[0] = addr >> 5*8;
1091
1092 val += inc;
1093
1094 list_for_each_entry(sdata, &local->interfaces, list) {
1095 if (memcmp(tmp_addr, sdata->vif.addr,
1096 ETH_ALEN) == 0) {
1097 used = true;
1098 break;
1099 }
1100 }
1101
1102 if (!used) {
1103 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1104 break;
1105 }
1106 addr = (start & ~mask) | (val & mask);
1107 } while (addr != start);
1108
1109 break;
1110 }
1111
1112 mutex_unlock(&local->iflist_mtx);
1113 }
1114
1115 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1116 struct net_device **new_dev, enum nl80211_iftype type,
1117 struct vif_params *params)
1118 {
1119 struct net_device *ndev;
1120 struct ieee80211_sub_if_data *sdata = NULL;
1121 int ret, i;
1122
1123 ASSERT_RTNL();
1124
1125 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1126 name, ieee80211_if_setup, local->hw.queues);
1127 if (!ndev)
1128 return -ENOMEM;
1129 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1130
1131 ndev->needed_headroom = local->tx_headroom +
1132 4*6 /* four MAC addresses */
1133 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1134 + 6 /* mesh */
1135 + 8 /* rfc1042/bridge tunnel */
1136 - ETH_HLEN /* ethernet hard_header_len */
1137 + IEEE80211_ENCRYPT_HEADROOM;
1138 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1139
1140 ret = dev_alloc_name(ndev, ndev->name);
1141 if (ret < 0)
1142 goto fail;
1143
1144 ieee80211_assign_perm_addr(local, ndev, type);
1145 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1146 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1147
1148 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1149 sdata = netdev_priv(ndev);
1150 ndev->ieee80211_ptr = &sdata->wdev;
1151 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1152 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1153
1154 /* initialise type-independent data */
1155 sdata->wdev.wiphy = local->hw.wiphy;
1156 sdata->local = local;
1157 sdata->dev = ndev;
1158 #ifdef CONFIG_INET
1159 sdata->arp_filter_state = true;
1160 #endif
1161
1162 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1163 skb_queue_head_init(&sdata->fragments[i].skb_list);
1164
1165 INIT_LIST_HEAD(&sdata->key_list);
1166
1167 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1168 struct ieee80211_supported_band *sband;
1169 sband = local->hw.wiphy->bands[i];
1170 sdata->rc_rateidx_mask[i] =
1171 sband ? (1 << sband->n_bitrates) - 1 : 0;
1172 }
1173
1174 /* setup type-dependent data */
1175 ieee80211_setup_sdata(sdata, type);
1176
1177 if (params) {
1178 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1179 if (type == NL80211_IFTYPE_STATION)
1180 sdata->u.mgd.use_4addr = params->use_4addr;
1181 }
1182
1183 ret = register_netdevice(ndev);
1184 if (ret)
1185 goto fail;
1186
1187 mutex_lock(&local->iflist_mtx);
1188 list_add_tail_rcu(&sdata->list, &local->interfaces);
1189 mutex_unlock(&local->iflist_mtx);
1190
1191 if (new_dev)
1192 *new_dev = ndev;
1193
1194 return 0;
1195
1196 fail:
1197 free_netdev(ndev);
1198 return ret;
1199 }
1200
1201 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1202 {
1203 ASSERT_RTNL();
1204
1205 mutex_lock(&sdata->local->iflist_mtx);
1206 list_del_rcu(&sdata->list);
1207 mutex_unlock(&sdata->local->iflist_mtx);
1208
1209 synchronize_rcu();
1210 unregister_netdevice(sdata->dev);
1211 }
1212
1213 /*
1214 * Remove all interfaces, may only be called at hardware unregistration
1215 * time because it doesn't do RCU-safe list removals.
1216 */
1217 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1218 {
1219 struct ieee80211_sub_if_data *sdata, *tmp;
1220 LIST_HEAD(unreg_list);
1221
1222 ASSERT_RTNL();
1223
1224 mutex_lock(&local->iflist_mtx);
1225 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1226 list_del(&sdata->list);
1227
1228 unregister_netdevice_queue(sdata->dev, &unreg_list);
1229 }
1230 mutex_unlock(&local->iflist_mtx);
1231 unregister_netdevice_many(&unreg_list);
1232 }
1233
1234 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1235 const char *reason)
1236 {
1237 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1238 return 0;
1239
1240 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1241 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1242 #endif
1243
1244 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1245 return IEEE80211_CONF_CHANGE_IDLE;
1246 }
1247
1248 static u32 ieee80211_idle_on(struct ieee80211_local *local)
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 now idle\n");
1255 #endif
1256
1257 drv_flush(local, false);
1258
1259 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1260 return IEEE80211_CONF_CHANGE_IDLE;
1261 }
1262
1263 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1264 {
1265 struct ieee80211_sub_if_data *sdata;
1266 int count = 0;
1267 bool working = false, scanning = false, hw_roc = false;
1268 struct ieee80211_work *wk;
1269 unsigned int led_trig_start = 0, led_trig_stop = 0;
1270
1271 #ifdef CONFIG_PROVE_LOCKING
1272 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1273 !lockdep_is_held(&local->iflist_mtx));
1274 #endif
1275 lockdep_assert_held(&local->mtx);
1276
1277 list_for_each_entry(sdata, &local->interfaces, list) {
1278 if (!ieee80211_sdata_running(sdata)) {
1279 sdata->vif.bss_conf.idle = true;
1280 continue;
1281 }
1282
1283 sdata->old_idle = sdata->vif.bss_conf.idle;
1284
1285 /* do not count disabled managed interfaces */
1286 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1287 !sdata->u.mgd.associated) {
1288 sdata->vif.bss_conf.idle = true;
1289 continue;
1290 }
1291 /* do not count unused IBSS interfaces */
1292 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1293 !sdata->u.ibss.ssid_len) {
1294 sdata->vif.bss_conf.idle = true;
1295 continue;
1296 }
1297 /* count everything else */
1298 count++;
1299 }
1300
1301 list_for_each_entry(wk, &local->work_list, list) {
1302 working = true;
1303 wk->sdata->vif.bss_conf.idle = false;
1304 }
1305
1306 if (local->scan_sdata) {
1307 scanning = true;
1308 local->scan_sdata->vif.bss_conf.idle = false;
1309 }
1310
1311 if (local->hw_roc_channel)
1312 hw_roc = true;
1313
1314 list_for_each_entry(sdata, &local->interfaces, list) {
1315 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1316 continue;
1317 if (!ieee80211_sdata_running(sdata))
1318 continue;
1319 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1320 }
1321
1322 if (working || scanning || hw_roc)
1323 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1324 else
1325 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1326
1327 if (count)
1328 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1329 else
1330 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1331
1332 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1333
1334 if (hw_roc)
1335 return ieee80211_idle_off(local, "hw remain-on-channel");
1336 if (working)
1337 return ieee80211_idle_off(local, "working");
1338 if (scanning)
1339 return ieee80211_idle_off(local, "scanning");
1340 if (!count)
1341 return ieee80211_idle_on(local);
1342 else
1343 return ieee80211_idle_off(local, "in use");
1344
1345 return 0;
1346 }
1347
1348 void ieee80211_recalc_idle(struct ieee80211_local *local)
1349 {
1350 u32 chg;
1351
1352 mutex_lock(&local->iflist_mtx);
1353 chg = __ieee80211_recalc_idle(local);
1354 mutex_unlock(&local->iflist_mtx);
1355 if (chg)
1356 ieee80211_hw_config(local, chg);
1357 }
1358
1359 static int netdev_notify(struct notifier_block *nb,
1360 unsigned long state,
1361 void *ndev)
1362 {
1363 struct net_device *dev = ndev;
1364 struct ieee80211_sub_if_data *sdata;
1365
1366 if (state != NETDEV_CHANGENAME)
1367 return 0;
1368
1369 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1370 return 0;
1371
1372 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1373 return 0;
1374
1375 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1376
1377 memcpy(sdata->name, dev->name, IFNAMSIZ);
1378
1379 ieee80211_debugfs_rename_netdev(sdata);
1380 return 0;
1381 }
1382
1383 static struct notifier_block mac80211_netdev_notifier = {
1384 .notifier_call = netdev_notify,
1385 };
1386
1387 int ieee80211_iface_init(void)
1388 {
1389 return register_netdevice_notifier(&mac80211_netdev_notifier);
1390 }
1391
1392 void ieee80211_iface_exit(void)
1393 {
1394 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1395 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree