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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
[cris-mirror.git] / net / mac80211 / iface.c
blob4054399be907f8be54d07cf786afc5693e562982
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 enum nl80211_channel_type orig_ct;
386
387 if (local->scan_sdata == sdata)
388 ieee80211_scan_cancel(local);
389
390 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
391
392 /*
393 * Stop TX on this interface first.
394 */
395 netif_tx_stop_all_queues(sdata->dev);
396
397 /*
398 * Purge work for this interface.
399 */
400 ieee80211_work_purge(sdata);
401
402 /*
403 * Remove all stations associated with this interface.
404 *
405 * This must be done before calling ops->remove_interface()
406 * because otherwise we can later invoke ops->sta_notify()
407 * whenever the STAs are removed, and that invalidates driver
408 * assumptions about always getting a vif pointer that is valid
409 * (because if we remove a STA after ops->remove_interface()
410 * the driver will have removed the vif info already!)
411 *
412 * This is relevant only in AP, WDS and mesh modes, since in
413 * all other modes we've already removed all stations when
414 * disconnecting etc.
415 */
416 sta_info_flush(local, sdata);
417
418 /*
419 * Don't count this interface for promisc/allmulti while it
420 * is down. dev_mc_unsync() will invoke set_multicast_list
421 * on the master interface which will sync these down to the
422 * hardware as filter flags.
423 */
424 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
425 atomic_dec(&local->iff_allmultis);
426
427 if (sdata->flags & IEEE80211_SDATA_PROMISC)
428 atomic_dec(&local->iff_promiscs);
429
430 if (sdata->vif.type == NL80211_IFTYPE_AP) {
431 local->fif_pspoll--;
432 local->fif_probe_req--;
433 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
434 local->fif_probe_req--;
435 }
436
437 netif_addr_lock_bh(sdata->dev);
438 spin_lock_bh(&local->filter_lock);
439 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
440 sdata->dev->addr_len);
441 spin_unlock_bh(&local->filter_lock);
442 netif_addr_unlock_bh(sdata->dev);
443
444 ieee80211_configure_filter(local);
445
446 del_timer_sync(&local->dynamic_ps_timer);
447 cancel_work_sync(&local->dynamic_ps_enable_work);
448
449 /* APs need special treatment */
450 if (sdata->vif.type == NL80211_IFTYPE_AP) {
451 struct ieee80211_sub_if_data *vlan, *tmpsdata;
452 struct beacon_data *old_beacon = sdata->u.ap.beacon;
453
454 /* sdata_running will return false, so this will disable */
455 ieee80211_bss_info_change_notify(sdata,
456 BSS_CHANGED_BEACON_ENABLED);
457
458 /* remove beacon */
459 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
460 synchronize_rcu();
461 kfree(old_beacon);
462
463 /* free all potentially still buffered bcast frames */
464 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
465 local->total_ps_buffered--;
466 dev_kfree_skb(skb);
467 }
468
469 /* down all dependent devices, that is VLANs */
470 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
471 u.vlan.list)
472 dev_close(vlan->dev);
473 WARN_ON(!list_empty(&sdata->u.ap.vlans));
474 }
475
476 if (going_down)
477 local->open_count--;
478
479 switch (sdata->vif.type) {
480 case NL80211_IFTYPE_AP_VLAN:
481 list_del(&sdata->u.vlan.list);
482 /* no need to tell driver */
483 break;
484 case NL80211_IFTYPE_MONITOR:
485 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
486 local->cooked_mntrs--;
487 break;
488 }
489
490 local->monitors--;
491 if (local->monitors == 0) {
492 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
493 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
494 }
495
496 ieee80211_adjust_monitor_flags(sdata, -1);
497 ieee80211_configure_filter(local);
498 break;
499 default:
500 flush_work(&sdata->work);
501 /*
502 * When we get here, the interface is marked down.
503 * Call synchronize_rcu() to wait for the RX path
504 * should it be using the interface and enqueuing
505 * frames at this very time on another CPU.
506 */
507 synchronize_rcu();
508 skb_queue_purge(&sdata->skb_queue);
509
510 /*
511 * Disable beaconing here for mesh only, AP and IBSS
512 * are already taken care of.
513 */
514 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
515 ieee80211_bss_info_change_notify(sdata,
516 BSS_CHANGED_BEACON_ENABLED);
517
518 /*
519 * Free all remaining keys, there shouldn't be any,
520 * except maybe group keys in AP more or WDS?
521 */
522 ieee80211_free_keys(sdata);
523
524 if (going_down)
525 drv_remove_interface(local, &sdata->vif);
526 }
527
528 sdata->bss = NULL;
529
530 mutex_lock(&local->mtx);
531 hw_reconf_flags |= __ieee80211_recalc_idle(local);
532 mutex_unlock(&local->mtx);
533
534 ieee80211_recalc_ps(local, -1);
535
536 if (local->open_count == 0) {
537 if (local->ops->napi_poll)
538 napi_disable(&local->napi);
539 ieee80211_clear_tx_pending(local);
540 ieee80211_stop_device(local);
541
542 /* no reconfiguring after stop! */
543 hw_reconf_flags = 0;
544 }
545
546 /* Re-calculate channel-type, in case there are multiple vifs
547 * on different channel types.
548 */
549 orig_ct = local->_oper_channel_type;
550 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
551
552 /* do after stop to avoid reconfiguring when we stop anyway */
553 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
554 ieee80211_hw_config(local, hw_reconf_flags);
555
556 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
557 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
558 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
560 if (info->control.vif == &sdata->vif) {
561 __skb_unlink(skb, &local->pending[i]);
562 dev_kfree_skb_irq(skb);
563 }
564 }
565 }
566 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
567 }
568
569 static int ieee80211_stop(struct net_device *dev)
570 {
571 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
572
573 ieee80211_do_stop(sdata, true);
574
575 return 0;
576 }
577
578 static void ieee80211_set_multicast_list(struct net_device *dev)
579 {
580 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
581 struct ieee80211_local *local = sdata->local;
582 int allmulti, promisc, sdata_allmulti, sdata_promisc;
583
584 allmulti = !!(dev->flags & IFF_ALLMULTI);
585 promisc = !!(dev->flags & IFF_PROMISC);
586 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
587 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
588
589 if (allmulti != sdata_allmulti) {
590 if (dev->flags & IFF_ALLMULTI)
591 atomic_inc(&local->iff_allmultis);
592 else
593 atomic_dec(&local->iff_allmultis);
594 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
595 }
596
597 if (promisc != sdata_promisc) {
598 if (dev->flags & IFF_PROMISC)
599 atomic_inc(&local->iff_promiscs);
600 else
601 atomic_dec(&local->iff_promiscs);
602 sdata->flags ^= IEEE80211_SDATA_PROMISC;
603 }
604 spin_lock_bh(&local->filter_lock);
605 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
606 spin_unlock_bh(&local->filter_lock);
607 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
608 }
609
610 /*
611 * Called when the netdev is removed or, by the code below, before
612 * the interface type changes.
613 */
614 static void ieee80211_teardown_sdata(struct net_device *dev)
615 {
616 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
617 struct ieee80211_local *local = sdata->local;
618 int flushed;
619 int i;
620
621 /* free extra data */
622 ieee80211_free_keys(sdata);
623
624 ieee80211_debugfs_remove_netdev(sdata);
625
626 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
627 __skb_queue_purge(&sdata->fragments[i].skb_list);
628 sdata->fragment_next = 0;
629
630 if (ieee80211_vif_is_mesh(&sdata->vif))
631 mesh_rmc_free(sdata);
632
633 flushed = sta_info_flush(local, sdata);
634 WARN_ON(flushed);
635 }
636
637 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
638 struct sk_buff *skb)
639 {
640 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
641 }
642
643 static const struct net_device_ops ieee80211_dataif_ops = {
644 .ndo_open = ieee80211_open,
645 .ndo_stop = ieee80211_stop,
646 .ndo_uninit = ieee80211_teardown_sdata,
647 .ndo_start_xmit = ieee80211_subif_start_xmit,
648 .ndo_set_multicast_list = ieee80211_set_multicast_list,
649 .ndo_change_mtu = ieee80211_change_mtu,
650 .ndo_set_mac_address = ieee80211_change_mac,
651 .ndo_select_queue = ieee80211_netdev_select_queue,
652 };
653
654 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
655 struct sk_buff *skb)
656 {
657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
658 struct ieee80211_local *local = sdata->local;
659 struct ieee80211_hdr *hdr;
660 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
661 u8 *p;
662
663 if (local->hw.queues < 4)
664 return 0;
665
666 if (skb->len < 4 ||
667 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
668 return 0; /* doesn't matter, frame will be dropped */
669
670 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
671
672 if (!ieee80211_is_data(hdr->frame_control)) {
673 skb->priority = 7;
674 return ieee802_1d_to_ac[skb->priority];
675 }
676 if (!ieee80211_is_data_qos(hdr->frame_control)) {
677 skb->priority = 0;
678 return ieee802_1d_to_ac[skb->priority];
679 }
680
681 p = ieee80211_get_qos_ctl(hdr);
682 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
683
684 return ieee80211_downgrade_queue(local, skb);
685 }
686
687 static const struct net_device_ops ieee80211_monitorif_ops = {
688 .ndo_open = ieee80211_open,
689 .ndo_stop = ieee80211_stop,
690 .ndo_uninit = ieee80211_teardown_sdata,
691 .ndo_start_xmit = ieee80211_monitor_start_xmit,
692 .ndo_set_multicast_list = ieee80211_set_multicast_list,
693 .ndo_change_mtu = ieee80211_change_mtu,
694 .ndo_set_mac_address = eth_mac_addr,
695 .ndo_select_queue = ieee80211_monitor_select_queue,
696 };
697
698 static void ieee80211_if_setup(struct net_device *dev)
699 {
700 ether_setup(dev);
701 dev->netdev_ops = &ieee80211_dataif_ops;
702 dev->destructor = free_netdev;
703 }
704
705 static void ieee80211_iface_work(struct work_struct *work)
706 {
707 struct ieee80211_sub_if_data *sdata =
708 container_of(work, struct ieee80211_sub_if_data, work);
709 struct ieee80211_local *local = sdata->local;
710 struct sk_buff *skb;
711 struct sta_info *sta;
712 struct ieee80211_ra_tid *ra_tid;
713
714 if (!ieee80211_sdata_running(sdata))
715 return;
716
717 if (local->scanning)
718 return;
719
720 /*
721 * ieee80211_queue_work() should have picked up most cases,
722 * here we'll pick the rest.
723 */
724 if (WARN(local->suspended,
725 "interface work scheduled while going to suspend\n"))
726 return;
727
728 /* first process frames */
729 while ((skb = skb_dequeue(&sdata->skb_queue))) {
730 struct ieee80211_mgmt *mgmt = (void *)skb->data;
731
732 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
733 ra_tid = (void *)&skb->cb;
734 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
735 ra_tid->tid);
736 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
737 ra_tid = (void *)&skb->cb;
738 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
739 ra_tid->tid);
740 } else if (ieee80211_is_action(mgmt->frame_control) &&
741 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
742 int len = skb->len;
743
744 mutex_lock(&local->sta_mtx);
745 sta = sta_info_get_bss(sdata, mgmt->sa);
746 if (sta) {
747 switch (mgmt->u.action.u.addba_req.action_code) {
748 case WLAN_ACTION_ADDBA_REQ:
749 ieee80211_process_addba_request(
750 local, sta, mgmt, len);
751 break;
752 case WLAN_ACTION_ADDBA_RESP:
753 ieee80211_process_addba_resp(local, sta,
754 mgmt, len);
755 break;
756 case WLAN_ACTION_DELBA:
757 ieee80211_process_delba(sdata, sta,
758 mgmt, len);
759 break;
760 default:
761 WARN_ON(1);
762 break;
763 }
764 }
765 mutex_unlock(&local->sta_mtx);
766 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
767 struct ieee80211_hdr *hdr = (void *)mgmt;
768 /*
769 * So the frame isn't mgmt, but frame_control
770 * is at the right place anyway, of course, so
771 * the if statement is correct.
772 *
773 * Warn if we have other data frame types here,
774 * they must not get here.
775 */
776 WARN_ON(hdr->frame_control &
777 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
778 WARN_ON(!(hdr->seq_ctrl &
779 cpu_to_le16(IEEE80211_SCTL_FRAG)));
780 /*
781 * This was a fragment of a frame, received while
782 * a block-ack session was active. That cannot be
783 * right, so terminate the session.
784 */
785 mutex_lock(&local->sta_mtx);
786 sta = sta_info_get_bss(sdata, mgmt->sa);
787 if (sta) {
788 u16 tid = *ieee80211_get_qos_ctl(hdr) &
789 IEEE80211_QOS_CTL_TID_MASK;
790
791 __ieee80211_stop_rx_ba_session(
792 sta, tid, WLAN_BACK_RECIPIENT,
793 WLAN_REASON_QSTA_REQUIRE_SETUP,
794 true);
795 }
796 mutex_unlock(&local->sta_mtx);
797 } else switch (sdata->vif.type) {
798 case NL80211_IFTYPE_STATION:
799 ieee80211_sta_rx_queued_mgmt(sdata, skb);
800 break;
801 case NL80211_IFTYPE_ADHOC:
802 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
803 break;
804 case NL80211_IFTYPE_MESH_POINT:
805 if (!ieee80211_vif_is_mesh(&sdata->vif))
806 break;
807 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
808 break;
809 default:
810 WARN(1, "frame for unexpected interface type");
811 break;
812 }
813
814 kfree_skb(skb);
815 }
816
817 /* then other type-dependent work */
818 switch (sdata->vif.type) {
819 case NL80211_IFTYPE_STATION:
820 ieee80211_sta_work(sdata);
821 break;
822 case NL80211_IFTYPE_ADHOC:
823 ieee80211_ibss_work(sdata);
824 break;
825 case NL80211_IFTYPE_MESH_POINT:
826 if (!ieee80211_vif_is_mesh(&sdata->vif))
827 break;
828 ieee80211_mesh_work(sdata);
829 break;
830 default:
831 break;
832 }
833 }
834
835
836 /*
837 * Helper function to initialise an interface to a specific type.
838 */
839 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
840 enum nl80211_iftype type)
841 {
842 /* clear type-dependent union */
843 memset(&sdata->u, 0, sizeof(sdata->u));
844
845 /* and set some type-dependent values */
846 sdata->vif.type = type;
847 sdata->vif.p2p = false;
848 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
849 sdata->wdev.iftype = type;
850
851 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
852 sdata->control_port_no_encrypt = false;
853
854 /* only monitor differs */
855 sdata->dev->type = ARPHRD_ETHER;
856
857 skb_queue_head_init(&sdata->skb_queue);
858 INIT_WORK(&sdata->work, ieee80211_iface_work);
859
860 switch (type) {
861 case NL80211_IFTYPE_P2P_GO:
862 type = NL80211_IFTYPE_AP;
863 sdata->vif.type = type;
864 sdata->vif.p2p = true;
865 /* fall through */
866 case NL80211_IFTYPE_AP:
867 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
868 INIT_LIST_HEAD(&sdata->u.ap.vlans);
869 break;
870 case NL80211_IFTYPE_P2P_CLIENT:
871 type = NL80211_IFTYPE_STATION;
872 sdata->vif.type = type;
873 sdata->vif.p2p = true;
874 /* fall through */
875 case NL80211_IFTYPE_STATION:
876 ieee80211_sta_setup_sdata(sdata);
877 break;
878 case NL80211_IFTYPE_ADHOC:
879 ieee80211_ibss_setup_sdata(sdata);
880 break;
881 case NL80211_IFTYPE_MESH_POINT:
882 if (ieee80211_vif_is_mesh(&sdata->vif))
883 ieee80211_mesh_init_sdata(sdata);
884 break;
885 case NL80211_IFTYPE_MONITOR:
886 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
887 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
888 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
889 MONITOR_FLAG_OTHER_BSS;
890 break;
891 case NL80211_IFTYPE_WDS:
892 case NL80211_IFTYPE_AP_VLAN:
893 break;
894 case NL80211_IFTYPE_UNSPECIFIED:
895 case NUM_NL80211_IFTYPES:
896 BUG();
897 break;
898 }
899
900 ieee80211_debugfs_add_netdev(sdata);
901 }
902
903 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
904 enum nl80211_iftype type)
905 {
906 struct ieee80211_local *local = sdata->local;
907 int ret, err;
908 enum nl80211_iftype internal_type = type;
909 bool p2p = false;
910
911 ASSERT_RTNL();
912
913 if (!local->ops->change_interface)
914 return -EBUSY;
915
916 switch (sdata->vif.type) {
917 case NL80211_IFTYPE_AP:
918 case NL80211_IFTYPE_STATION:
919 case NL80211_IFTYPE_ADHOC:
920 /*
921 * Could maybe also all others here?
922 * Just not sure how that interacts
923 * with the RX/config path e.g. for
924 * mesh.
925 */
926 break;
927 default:
928 return -EBUSY;
929 }
930
931 switch (type) {
932 case NL80211_IFTYPE_AP:
933 case NL80211_IFTYPE_STATION:
934 case NL80211_IFTYPE_ADHOC:
935 /*
936 * Could probably support everything
937 * but WDS here (WDS do_open can fail
938 * under memory pressure, which this
939 * code isn't prepared to handle).
940 */
941 break;
942 case NL80211_IFTYPE_P2P_CLIENT:
943 p2p = true;
944 internal_type = NL80211_IFTYPE_STATION;
945 break;
946 case NL80211_IFTYPE_P2P_GO:
947 p2p = true;
948 internal_type = NL80211_IFTYPE_AP;
949 break;
950 default:
951 return -EBUSY;
952 }
953
954 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
955 if (ret)
956 return ret;
957
958 ieee80211_do_stop(sdata, false);
959
960 ieee80211_teardown_sdata(sdata->dev);
961
962 ret = drv_change_interface(local, sdata, internal_type, p2p);
963 if (ret)
964 type = sdata->vif.type;
965
966 ieee80211_setup_sdata(sdata, type);
967
968 err = ieee80211_do_open(sdata->dev, false);
969 WARN(err, "type change: do_open returned %d", err);
970
971 return ret;
972 }
973
974 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
975 enum nl80211_iftype type)
976 {
977 int ret;
978
979 ASSERT_RTNL();
980
981 if (type == ieee80211_vif_type_p2p(&sdata->vif))
982 return 0;
983
984 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
985 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
986 type == NL80211_IFTYPE_ADHOC)
987 return -EOPNOTSUPP;
988
989 if (ieee80211_sdata_running(sdata)) {
990 ret = ieee80211_runtime_change_iftype(sdata, type);
991 if (ret)
992 return ret;
993 } else {
994 /* Purge and reset type-dependent state. */
995 ieee80211_teardown_sdata(sdata->dev);
996 ieee80211_setup_sdata(sdata, type);
997 }
998
999 /* reset some values that shouldn't be kept across type changes */
1000 sdata->vif.bss_conf.basic_rates =
1001 ieee80211_mandatory_rates(sdata->local,
1002 sdata->local->hw.conf.channel->band);
1003 sdata->drop_unencrypted = 0;
1004 if (type == NL80211_IFTYPE_STATION)
1005 sdata->u.mgd.use_4addr = false;
1006
1007 return 0;
1008 }
1009
1010 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1011 struct net_device *dev,
1012 enum nl80211_iftype type)
1013 {
1014 struct ieee80211_sub_if_data *sdata;
1015 u64 mask, start, addr, val, inc;
1016 u8 *m;
1017 u8 tmp_addr[ETH_ALEN];
1018 int i;
1019
1020 /* default ... something at least */
1021 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1022
1023 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1024 local->hw.wiphy->n_addresses <= 1)
1025 return;
1026
1027
1028 mutex_lock(&local->iflist_mtx);
1029
1030 switch (type) {
1031 case NL80211_IFTYPE_MONITOR:
1032 /* doesn't matter */
1033 break;
1034 case NL80211_IFTYPE_WDS:
1035 case NL80211_IFTYPE_AP_VLAN:
1036 /* match up with an AP interface */
1037 list_for_each_entry(sdata, &local->interfaces, list) {
1038 if (sdata->vif.type != NL80211_IFTYPE_AP)
1039 continue;
1040 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1041 break;
1042 }
1043 /* keep default if no AP interface present */
1044 break;
1045 default:
1046 /* assign a new address if possible -- try n_addresses first */
1047 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1048 bool used = false;
1049
1050 list_for_each_entry(sdata, &local->interfaces, list) {
1051 if (memcmp(local->hw.wiphy->addresses[i].addr,
1052 sdata->vif.addr, ETH_ALEN) == 0) {
1053 used = true;
1054 break;
1055 }
1056 }
1057
1058 if (!used) {
1059 memcpy(dev->perm_addr,
1060 local->hw.wiphy->addresses[i].addr,
1061 ETH_ALEN);
1062 break;
1063 }
1064 }
1065
1066 /* try mask if available */
1067 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1068 break;
1069
1070 m = local->hw.wiphy->addr_mask;
1071 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1072 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1073 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1074
1075 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1076 /* not a contiguous mask ... not handled now! */
1077 printk(KERN_DEBUG "not contiguous\n");
1078 break;
1079 }
1080
1081 m = local->hw.wiphy->perm_addr;
1082 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1083 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1084 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1085
1086 inc = 1ULL<<__ffs64(mask);
1087 val = (start & mask);
1088 addr = (start & ~mask) | (val & mask);
1089 do {
1090 bool used = false;
1091
1092 tmp_addr[5] = addr >> 0*8;
1093 tmp_addr[4] = addr >> 1*8;
1094 tmp_addr[3] = addr >> 2*8;
1095 tmp_addr[2] = addr >> 3*8;
1096 tmp_addr[1] = addr >> 4*8;
1097 tmp_addr[0] = addr >> 5*8;
1098
1099 val += inc;
1100
1101 list_for_each_entry(sdata, &local->interfaces, list) {
1102 if (memcmp(tmp_addr, sdata->vif.addr,
1103 ETH_ALEN) == 0) {
1104 used = true;
1105 break;
1106 }
1107 }
1108
1109 if (!used) {
1110 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1111 break;
1112 }
1113 addr = (start & ~mask) | (val & mask);
1114 } while (addr != start);
1115
1116 break;
1117 }
1118
1119 mutex_unlock(&local->iflist_mtx);
1120 }
1121
1122 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1123 struct net_device **new_dev, enum nl80211_iftype type,
1124 struct vif_params *params)
1125 {
1126 struct net_device *ndev;
1127 struct ieee80211_sub_if_data *sdata = NULL;
1128 int ret, i;
1129
1130 ASSERT_RTNL();
1131
1132 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1133 name, ieee80211_if_setup, local->hw.queues);
1134 if (!ndev)
1135 return -ENOMEM;
1136 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1137
1138 ndev->needed_headroom = local->tx_headroom +
1139 4*6 /* four MAC addresses */
1140 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1141 + 6 /* mesh */
1142 + 8 /* rfc1042/bridge tunnel */
1143 - ETH_HLEN /* ethernet hard_header_len */
1144 + IEEE80211_ENCRYPT_HEADROOM;
1145 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1146
1147 ret = dev_alloc_name(ndev, ndev->name);
1148 if (ret < 0)
1149 goto fail;
1150
1151 ieee80211_assign_perm_addr(local, ndev, type);
1152 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1153 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1154
1155 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1156 sdata = netdev_priv(ndev);
1157 ndev->ieee80211_ptr = &sdata->wdev;
1158 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1159 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1160
1161 /* initialise type-independent data */
1162 sdata->wdev.wiphy = local->hw.wiphy;
1163 sdata->local = local;
1164 sdata->dev = ndev;
1165 #ifdef CONFIG_INET
1166 sdata->arp_filter_state = true;
1167 #endif
1168
1169 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1170 skb_queue_head_init(&sdata->fragments[i].skb_list);
1171
1172 INIT_LIST_HEAD(&sdata->key_list);
1173
1174 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1175 struct ieee80211_supported_band *sband;
1176 sband = local->hw.wiphy->bands[i];
1177 sdata->rc_rateidx_mask[i] =
1178 sband ? (1 << sband->n_bitrates) - 1 : 0;
1179 }
1180
1181 /* setup type-dependent data */
1182 ieee80211_setup_sdata(sdata, type);
1183
1184 if (params) {
1185 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1186 if (type == NL80211_IFTYPE_STATION)
1187 sdata->u.mgd.use_4addr = params->use_4addr;
1188 }
1189
1190 ret = register_netdevice(ndev);
1191 if (ret)
1192 goto fail;
1193
1194 mutex_lock(&local->iflist_mtx);
1195 list_add_tail_rcu(&sdata->list, &local->interfaces);
1196 mutex_unlock(&local->iflist_mtx);
1197
1198 if (new_dev)
1199 *new_dev = ndev;
1200
1201 return 0;
1202
1203 fail:
1204 free_netdev(ndev);
1205 return ret;
1206 }
1207
1208 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1209 {
1210 ASSERT_RTNL();
1211
1212 mutex_lock(&sdata->local->iflist_mtx);
1213 list_del_rcu(&sdata->list);
1214 mutex_unlock(&sdata->local->iflist_mtx);
1215
1216 synchronize_rcu();
1217 unregister_netdevice(sdata->dev);
1218 }
1219
1220 /*
1221 * Remove all interfaces, may only be called at hardware unregistration
1222 * time because it doesn't do RCU-safe list removals.
1223 */
1224 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1225 {
1226 struct ieee80211_sub_if_data *sdata, *tmp;
1227 LIST_HEAD(unreg_list);
1228
1229 ASSERT_RTNL();
1230
1231 mutex_lock(&local->iflist_mtx);
1232 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1233 list_del(&sdata->list);
1234
1235 unregister_netdevice_queue(sdata->dev, &unreg_list);
1236 }
1237 mutex_unlock(&local->iflist_mtx);
1238 unregister_netdevice_many(&unreg_list);
1239 list_del(&unreg_list);
1240 }
1241
1242 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1243 const char *reason)
1244 {
1245 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1246 return 0;
1247
1248 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1249 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1250 #endif
1251
1252 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1253 return IEEE80211_CONF_CHANGE_IDLE;
1254 }
1255
1256 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1257 {
1258 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1259 return 0;
1260
1261 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1262 wiphy_debug(local->hw.wiphy, "device now idle\n");
1263 #endif
1264
1265 drv_flush(local, false);
1266
1267 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1268 return IEEE80211_CONF_CHANGE_IDLE;
1269 }
1270
1271 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1272 {
1273 struct ieee80211_sub_if_data *sdata;
1274 int count = 0;
1275 bool working = false, scanning = false, hw_roc = false;
1276 struct ieee80211_work *wk;
1277 unsigned int led_trig_start = 0, led_trig_stop = 0;
1278
1279 #ifdef CONFIG_PROVE_LOCKING
1280 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1281 !lockdep_is_held(&local->iflist_mtx));
1282 #endif
1283 lockdep_assert_held(&local->mtx);
1284
1285 list_for_each_entry(sdata, &local->interfaces, list) {
1286 if (!ieee80211_sdata_running(sdata)) {
1287 sdata->vif.bss_conf.idle = true;
1288 continue;
1289 }
1290
1291 sdata->old_idle = sdata->vif.bss_conf.idle;
1292
1293 /* do not count disabled managed interfaces */
1294 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1295 !sdata->u.mgd.associated) {
1296 sdata->vif.bss_conf.idle = true;
1297 continue;
1298 }
1299 /* do not count unused IBSS interfaces */
1300 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1301 !sdata->u.ibss.ssid_len) {
1302 sdata->vif.bss_conf.idle = true;
1303 continue;
1304 }
1305 /* count everything else */
1306 count++;
1307 }
1308
1309 list_for_each_entry(wk, &local->work_list, list) {
1310 working = true;
1311 wk->sdata->vif.bss_conf.idle = false;
1312 }
1313
1314 if (local->scan_sdata) {
1315 scanning = true;
1316 local->scan_sdata->vif.bss_conf.idle = false;
1317 }
1318
1319 if (local->hw_roc_channel)
1320 hw_roc = true;
1321
1322 list_for_each_entry(sdata, &local->interfaces, list) {
1323 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1324 continue;
1325 if (!ieee80211_sdata_running(sdata))
1326 continue;
1327 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1328 }
1329
1330 if (working || scanning || hw_roc)
1331 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1332 else
1333 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1334
1335 if (count)
1336 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1337 else
1338 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1339
1340 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1341
1342 if (hw_roc)
1343 return ieee80211_idle_off(local, "hw remain-on-channel");
1344 if (working)
1345 return ieee80211_idle_off(local, "working");
1346 if (scanning)
1347 return ieee80211_idle_off(local, "scanning");
1348 if (!count)
1349 return ieee80211_idle_on(local);
1350 else
1351 return ieee80211_idle_off(local, "in use");
1352
1353 return 0;
1354 }
1355
1356 void ieee80211_recalc_idle(struct ieee80211_local *local)
1357 {
1358 u32 chg;
1359
1360 mutex_lock(&local->iflist_mtx);
1361 chg = __ieee80211_recalc_idle(local);
1362 mutex_unlock(&local->iflist_mtx);
1363 if (chg)
1364 ieee80211_hw_config(local, chg);
1365 }
1366
1367 static int netdev_notify(struct notifier_block *nb,
1368 unsigned long state,
1369 void *ndev)
1370 {
1371 struct net_device *dev = ndev;
1372 struct ieee80211_sub_if_data *sdata;
1373
1374 if (state != NETDEV_CHANGENAME)
1375 return 0;
1376
1377 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1378 return 0;
1379
1380 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1381 return 0;
1382
1383 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1384
1385 memcpy(sdata->name, dev->name, IFNAMSIZ);
1386
1387 ieee80211_debugfs_rename_netdev(sdata);
1388 return 0;
1389 }
1390
1391 static struct notifier_block mac80211_netdev_notifier = {
1392 .notifier_call = netdev_notify,
1393 };
1394
1395 int ieee80211_iface_init(void)
1396 {
1397 return register_netdevice_notifier(&mac80211_netdev_notifier);
1398 }
1399
1400 void ieee80211_iface_exit(void)
1401 {
1402 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1403 }
CRIS linux kernel tree