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agp: kill agp_rebind_memory
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / iface.c
blob7aa85591dbe764ca8b485759a94922ab4b58520b
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 if (!ieee80211_vif_is_mesh(&sdata->vif))
201 break;
202 /* mesh ifaces must set allmulti to forward mcast traffic */
203 atomic_inc(&local->iff_allmultis);
204 break;
205 case NL80211_IFTYPE_STATION:
206 case NL80211_IFTYPE_MONITOR:
207 case NL80211_IFTYPE_ADHOC:
208 /* no special treatment */
209 break;
210 case NL80211_IFTYPE_UNSPECIFIED:
211 case NUM_NL80211_IFTYPES:
212 case NL80211_IFTYPE_P2P_CLIENT:
213 case NL80211_IFTYPE_P2P_GO:
214 /* cannot happen */
215 WARN_ON(1);
216 break;
217 }
218
219 if (local->open_count == 0) {
220 res = drv_start(local);
221 if (res)
222 goto err_del_bss;
223 if (local->ops->napi_poll)
224 napi_enable(&local->napi);
225 /* we're brought up, everything changes */
226 hw_reconf_flags = ~0;
227 ieee80211_led_radio(local, true);
228 }
229
230 /*
231 * Copy the hopefully now-present MAC address to
232 * this interface, if it has the special null one.
233 */
234 if (is_zero_ether_addr(dev->dev_addr)) {
235 memcpy(dev->dev_addr,
236 local->hw.wiphy->perm_addr,
237 ETH_ALEN);
238 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
239
240 if (!is_valid_ether_addr(dev->dev_addr)) {
241 if (!local->open_count)
242 drv_stop(local);
243 return -EADDRNOTAVAIL;
244 }
245 }
246
247 switch (sdata->vif.type) {
248 case NL80211_IFTYPE_AP_VLAN:
249 /* no need to tell driver */
250 break;
251 case NL80211_IFTYPE_MONITOR:
252 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
253 local->cooked_mntrs++;
254 break;
255 }
256
257 /* must be before the call to ieee80211_configure_filter */
258 local->monitors++;
259 if (local->monitors == 1) {
260 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
261 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
262 }
263
264 ieee80211_adjust_monitor_flags(sdata, 1);
265 ieee80211_configure_filter(local);
266
267 netif_carrier_on(dev);
268 break;
269 default:
270 if (coming_up) {
271 res = drv_add_interface(local, &sdata->vif);
272 if (res)
273 goto err_stop;
274 }
275
276 if (ieee80211_vif_is_mesh(&sdata->vif)) {
277 local->fif_other_bss++;
278 ieee80211_configure_filter(local);
279
280 ieee80211_start_mesh(sdata);
281 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
282 local->fif_pspoll++;
283 local->fif_probe_req++;
284
285 ieee80211_configure_filter(local);
286 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
287 local->fif_probe_req++;
288 }
289
290 changed |= ieee80211_reset_erp_info(sdata);
291 ieee80211_bss_info_change_notify(sdata, changed);
292
293 if (sdata->vif.type == NL80211_IFTYPE_STATION)
294 netif_carrier_off(dev);
295 else
296 netif_carrier_on(dev);
297 }
298
299 set_bit(SDATA_STATE_RUNNING, &sdata->state);
300
301 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
302 /* Create STA entry for the WDS peer */
303 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
304 GFP_KERNEL);
305 if (!sta) {
306 res = -ENOMEM;
307 goto err_del_interface;
308 }
309
310 /* no locking required since STA is not live yet */
311 sta->flags |= WLAN_STA_AUTHORIZED;
312
313 res = sta_info_insert(sta);
314 if (res) {
315 /* STA has been freed */
316 goto err_del_interface;
317 }
318
319 rate_control_rate_init(sta);
320 }
321
322 /*
323 * set_multicast_list will be invoked by the networking core
324 * which will check whether any increments here were done in
325 * error and sync them down to the hardware as filter flags.
326 */
327 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
328 atomic_inc(&local->iff_allmultis);
329
330 if (sdata->flags & IEEE80211_SDATA_PROMISC)
331 atomic_inc(&local->iff_promiscs);
332
333 mutex_lock(&local->mtx);
334 hw_reconf_flags |= __ieee80211_recalc_idle(local);
335 mutex_unlock(&local->mtx);
336
337 if (coming_up)
338 local->open_count++;
339
340 if (hw_reconf_flags) {
341 ieee80211_hw_config(local, hw_reconf_flags);
342 /*
343 * set default queue parameters so drivers don't
344 * need to initialise the hardware if the hardware
345 * doesn't start up with sane defaults
346 */
347 ieee80211_set_wmm_default(sdata);
348 }
349
350 ieee80211_recalc_ps(local, -1);
351
352 netif_tx_start_all_queues(dev);
353
354 return 0;
355 err_del_interface:
356 drv_remove_interface(local, &sdata->vif);
357 err_stop:
358 if (!local->open_count)
359 drv_stop(local);
360 err_del_bss:
361 sdata->bss = NULL;
362 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
363 list_del(&sdata->u.vlan.list);
364 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
365 return res;
366 }
367
368 static int ieee80211_open(struct net_device *dev)
369 {
370 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
371 int err;
372
373 /* fail early if user set an invalid address */
374 if (!is_zero_ether_addr(dev->dev_addr) &&
375 !is_valid_ether_addr(dev->dev_addr))
376 return -EADDRNOTAVAIL;
377
378 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
379 if (err)
380 return err;
381
382 return ieee80211_do_open(dev, true);
383 }
384
385 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
386 bool going_down)
387 {
388 struct ieee80211_local *local = sdata->local;
389 unsigned long flags;
390 struct sk_buff *skb, *tmp;
391 u32 hw_reconf_flags = 0;
392 int i;
393
394 if (local->scan_sdata == sdata)
395 ieee80211_scan_cancel(local);
396
397 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
398
399 /*
400 * Stop TX on this interface first.
401 */
402 netif_tx_stop_all_queues(sdata->dev);
403
404 /*
405 * Purge work for this interface.
406 */
407 ieee80211_work_purge(sdata);
408
409 /*
410 * Remove all stations associated with this interface.
411 *
412 * This must be done before calling ops->remove_interface()
413 * because otherwise we can later invoke ops->sta_notify()
414 * whenever the STAs are removed, and that invalidates driver
415 * assumptions about always getting a vif pointer that is valid
416 * (because if we remove a STA after ops->remove_interface()
417 * the driver will have removed the vif info already!)
418 *
419 * This is relevant only in AP, WDS and mesh modes, since in
420 * all other modes we've already removed all stations when
421 * disconnecting etc.
422 */
423 sta_info_flush(local, sdata);
424
425 /*
426 * Don't count this interface for promisc/allmulti while it
427 * is down. dev_mc_unsync() will invoke set_multicast_list
428 * on the master interface which will sync these down to the
429 * hardware as filter flags.
430 */
431 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
432 atomic_dec(&local->iff_allmultis);
433
434 if (sdata->flags & IEEE80211_SDATA_PROMISC)
435 atomic_dec(&local->iff_promiscs);
436
437 if (sdata->vif.type == NL80211_IFTYPE_AP) {
438 local->fif_pspoll--;
439 local->fif_probe_req--;
440 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
441 local->fif_probe_req--;
442 }
443
444 netif_addr_lock_bh(sdata->dev);
445 spin_lock_bh(&local->filter_lock);
446 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
447 sdata->dev->addr_len);
448 spin_unlock_bh(&local->filter_lock);
449 netif_addr_unlock_bh(sdata->dev);
450
451 ieee80211_configure_filter(local);
452
453 del_timer_sync(&local->dynamic_ps_timer);
454 cancel_work_sync(&local->dynamic_ps_enable_work);
455
456 /* APs need special treatment */
457 if (sdata->vif.type == NL80211_IFTYPE_AP) {
458 struct ieee80211_sub_if_data *vlan, *tmpsdata;
459 struct beacon_data *old_beacon = sdata->u.ap.beacon;
460
461 /* sdata_running will return false, so this will disable */
462 ieee80211_bss_info_change_notify(sdata,
463 BSS_CHANGED_BEACON_ENABLED);
464
465 /* remove beacon */
466 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
467 synchronize_rcu();
468 kfree(old_beacon);
469
470 /* free all potentially still buffered bcast frames */
471 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
472 local->total_ps_buffered--;
473 dev_kfree_skb(skb);
474 }
475
476 /* down all dependent devices, that is VLANs */
477 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
478 u.vlan.list)
479 dev_close(vlan->dev);
480 WARN_ON(!list_empty(&sdata->u.ap.vlans));
481 }
482
483 if (going_down)
484 local->open_count--;
485
486 switch (sdata->vif.type) {
487 case NL80211_IFTYPE_AP_VLAN:
488 list_del(&sdata->u.vlan.list);
489 /* no need to tell driver */
490 break;
491 case NL80211_IFTYPE_MONITOR:
492 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
493 local->cooked_mntrs--;
494 break;
495 }
496
497 local->monitors--;
498 if (local->monitors == 0) {
499 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
500 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
501 }
502
503 ieee80211_adjust_monitor_flags(sdata, -1);
504 ieee80211_configure_filter(local);
505 break;
506 case NL80211_IFTYPE_MESH_POINT:
507 if (ieee80211_vif_is_mesh(&sdata->vif)) {
508 /* other_bss and allmulti are always set on mesh
509 * ifaces */
510 local->fif_other_bss--;
511 atomic_dec(&local->iff_allmultis);
512
513 ieee80211_configure_filter(local);
514
515 ieee80211_stop_mesh(sdata);
516 }
517 /* fall through */
518 default:
519 flush_work(&sdata->work);
520 /*
521 * When we get here, the interface is marked down.
522 * Call synchronize_rcu() to wait for the RX path
523 * should it be using the interface and enqueuing
524 * frames at this very time on another CPU.
525 */
526 synchronize_rcu();
527 skb_queue_purge(&sdata->skb_queue);
528
529 /*
530 * Disable beaconing here for mesh only, AP and IBSS
531 * are already taken care of.
532 */
533 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
534 ieee80211_bss_info_change_notify(sdata,
535 BSS_CHANGED_BEACON_ENABLED);
536
537 /*
538 * Free all remaining keys, there shouldn't be any,
539 * except maybe group keys in AP more or WDS?
540 */
541 ieee80211_free_keys(sdata);
542
543 if (going_down)
544 drv_remove_interface(local, &sdata->vif);
545 }
546
547 sdata->bss = NULL;
548
549 mutex_lock(&local->mtx);
550 hw_reconf_flags |= __ieee80211_recalc_idle(local);
551 mutex_unlock(&local->mtx);
552
553 ieee80211_recalc_ps(local, -1);
554
555 if (local->open_count == 0) {
556 if (local->ops->napi_poll)
557 napi_disable(&local->napi);
558 ieee80211_clear_tx_pending(local);
559 ieee80211_stop_device(local);
560
561 /* no reconfiguring after stop! */
562 hw_reconf_flags = 0;
563 }
564
565 /* do after stop to avoid reconfiguring when we stop anyway */
566 if (hw_reconf_flags)
567 ieee80211_hw_config(local, hw_reconf_flags);
568
569 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
570 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
571 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
573 if (info->control.vif == &sdata->vif) {
574 __skb_unlink(skb, &local->pending[i]);
575 dev_kfree_skb_irq(skb);
576 }
577 }
578 }
579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
580 }
581
582 static int ieee80211_stop(struct net_device *dev)
583 {
584 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
585
586 ieee80211_do_stop(sdata, true);
587
588 return 0;
589 }
590
591 static void ieee80211_set_multicast_list(struct net_device *dev)
592 {
593 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
594 struct ieee80211_local *local = sdata->local;
595 int allmulti, promisc, sdata_allmulti, sdata_promisc;
596
597 allmulti = !!(dev->flags & IFF_ALLMULTI);
598 promisc = !!(dev->flags & IFF_PROMISC);
599 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
600 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
601
602 if (allmulti != sdata_allmulti) {
603 if (dev->flags & IFF_ALLMULTI)
604 atomic_inc(&local->iff_allmultis);
605 else
606 atomic_dec(&local->iff_allmultis);
607 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
608 }
609
610 if (promisc != sdata_promisc) {
611 if (dev->flags & IFF_PROMISC)
612 atomic_inc(&local->iff_promiscs);
613 else
614 atomic_dec(&local->iff_promiscs);
615 sdata->flags ^= IEEE80211_SDATA_PROMISC;
616 }
617 spin_lock_bh(&local->filter_lock);
618 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
619 spin_unlock_bh(&local->filter_lock);
620 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
621 }
622
623 /*
624 * Called when the netdev is removed or, by the code below, before
625 * the interface type changes.
626 */
627 static void ieee80211_teardown_sdata(struct net_device *dev)
628 {
629 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
630 struct ieee80211_local *local = sdata->local;
631 int flushed;
632 int i;
633
634 /* free extra data */
635 ieee80211_free_keys(sdata);
636
637 ieee80211_debugfs_remove_netdev(sdata);
638
639 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
640 __skb_queue_purge(&sdata->fragments[i].skb_list);
641 sdata->fragment_next = 0;
642
643 if (ieee80211_vif_is_mesh(&sdata->vif))
644 mesh_rmc_free(sdata);
645
646 flushed = sta_info_flush(local, sdata);
647 WARN_ON(flushed);
648 }
649
650 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
651 struct sk_buff *skb)
652 {
653 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
654 }
655
656 static const struct net_device_ops ieee80211_dataif_ops = {
657 .ndo_open = ieee80211_open,
658 .ndo_stop = ieee80211_stop,
659 .ndo_uninit = ieee80211_teardown_sdata,
660 .ndo_start_xmit = ieee80211_subif_start_xmit,
661 .ndo_set_multicast_list = ieee80211_set_multicast_list,
662 .ndo_change_mtu = ieee80211_change_mtu,
663 .ndo_set_mac_address = ieee80211_change_mac,
664 .ndo_select_queue = ieee80211_netdev_select_queue,
665 };
666
667 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
668 struct sk_buff *skb)
669 {
670 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
671 struct ieee80211_local *local = sdata->local;
672 struct ieee80211_hdr *hdr;
673 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
674 u8 *p;
675
676 if (local->hw.queues < 4)
677 return 0;
678
679 if (skb->len < 4 ||
680 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
681 return 0; /* doesn't matter, frame will be dropped */
682
683 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
684
685 if (!ieee80211_is_data(hdr->frame_control)) {
686 skb->priority = 7;
687 return ieee802_1d_to_ac[skb->priority];
688 }
689 if (!ieee80211_is_data_qos(hdr->frame_control)) {
690 skb->priority = 0;
691 return ieee802_1d_to_ac[skb->priority];
692 }
693
694 p = ieee80211_get_qos_ctl(hdr);
695 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
696
697 return ieee80211_downgrade_queue(local, skb);
698 }
699
700 static const struct net_device_ops ieee80211_monitorif_ops = {
701 .ndo_open = ieee80211_open,
702 .ndo_stop = ieee80211_stop,
703 .ndo_uninit = ieee80211_teardown_sdata,
704 .ndo_start_xmit = ieee80211_monitor_start_xmit,
705 .ndo_set_multicast_list = ieee80211_set_multicast_list,
706 .ndo_change_mtu = ieee80211_change_mtu,
707 .ndo_set_mac_address = eth_mac_addr,
708 .ndo_select_queue = ieee80211_monitor_select_queue,
709 };
710
711 static void ieee80211_if_setup(struct net_device *dev)
712 {
713 ether_setup(dev);
714 dev->netdev_ops = &ieee80211_dataif_ops;
715 dev->destructor = free_netdev;
716 }
717
718 static void ieee80211_iface_work(struct work_struct *work)
719 {
720 struct ieee80211_sub_if_data *sdata =
721 container_of(work, struct ieee80211_sub_if_data, work);
722 struct ieee80211_local *local = sdata->local;
723 struct sk_buff *skb;
724 struct sta_info *sta;
725 struct ieee80211_ra_tid *ra_tid;
726
727 if (!ieee80211_sdata_running(sdata))
728 return;
729
730 if (local->scanning)
731 return;
732
733 /*
734 * ieee80211_queue_work() should have picked up most cases,
735 * here we'll pick the rest.
736 */
737 if (WARN(local->suspended,
738 "interface work scheduled while going to suspend\n"))
739 return;
740
741 /* first process frames */
742 while ((skb = skb_dequeue(&sdata->skb_queue))) {
743 struct ieee80211_mgmt *mgmt = (void *)skb->data;
744
745 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
746 ra_tid = (void *)&skb->cb;
747 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
748 ra_tid->tid);
749 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
750 ra_tid = (void *)&skb->cb;
751 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
752 ra_tid->tid);
753 } else if (ieee80211_is_action(mgmt->frame_control) &&
754 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
755 int len = skb->len;
756
757 mutex_lock(&local->sta_mtx);
758 sta = sta_info_get_bss(sdata, mgmt->sa);
759 if (sta) {
760 switch (mgmt->u.action.u.addba_req.action_code) {
761 case WLAN_ACTION_ADDBA_REQ:
762 ieee80211_process_addba_request(
763 local, sta, mgmt, len);
764 break;
765 case WLAN_ACTION_ADDBA_RESP:
766 ieee80211_process_addba_resp(local, sta,
767 mgmt, len);
768 break;
769 case WLAN_ACTION_DELBA:
770 ieee80211_process_delba(sdata, sta,
771 mgmt, len);
772 break;
773 default:
774 WARN_ON(1);
775 break;
776 }
777 }
778 mutex_unlock(&local->sta_mtx);
779 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
780 struct ieee80211_hdr *hdr = (void *)mgmt;
781 /*
782 * So the frame isn't mgmt, but frame_control
783 * is at the right place anyway, of course, so
784 * the if statement is correct.
785 *
786 * Warn if we have other data frame types here,
787 * they must not get here.
788 */
789 WARN_ON(hdr->frame_control &
790 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
791 WARN_ON(!(hdr->seq_ctrl &
792 cpu_to_le16(IEEE80211_SCTL_FRAG)));
793 /*
794 * This was a fragment of a frame, received while
795 * a block-ack session was active. That cannot be
796 * right, so terminate the session.
797 */
798 mutex_lock(&local->sta_mtx);
799 sta = sta_info_get_bss(sdata, mgmt->sa);
800 if (sta) {
801 u16 tid = *ieee80211_get_qos_ctl(hdr) &
802 IEEE80211_QOS_CTL_TID_MASK;
803
804 __ieee80211_stop_rx_ba_session(
805 sta, tid, WLAN_BACK_RECIPIENT,
806 WLAN_REASON_QSTA_REQUIRE_SETUP,
807 true);
808 }
809 mutex_unlock(&local->sta_mtx);
810 } else switch (sdata->vif.type) {
811 case NL80211_IFTYPE_STATION:
812 ieee80211_sta_rx_queued_mgmt(sdata, skb);
813 break;
814 case NL80211_IFTYPE_ADHOC:
815 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
816 break;
817 case NL80211_IFTYPE_MESH_POINT:
818 if (!ieee80211_vif_is_mesh(&sdata->vif))
819 break;
820 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
821 break;
822 default:
823 WARN(1, "frame for unexpected interface type");
824 break;
825 }
826
827 kfree_skb(skb);
828 }
829
830 /* then other type-dependent work */
831 switch (sdata->vif.type) {
832 case NL80211_IFTYPE_STATION:
833 ieee80211_sta_work(sdata);
834 break;
835 case NL80211_IFTYPE_ADHOC:
836 ieee80211_ibss_work(sdata);
837 break;
838 case NL80211_IFTYPE_MESH_POINT:
839 if (!ieee80211_vif_is_mesh(&sdata->vif))
840 break;
841 ieee80211_mesh_work(sdata);
842 break;
843 default:
844 break;
845 }
846 }
847
848
849 /*
850 * Helper function to initialise an interface to a specific type.
851 */
852 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
853 enum nl80211_iftype type)
854 {
855 /* clear type-dependent union */
856 memset(&sdata->u, 0, sizeof(sdata->u));
857
858 /* and set some type-dependent values */
859 sdata->vif.type = type;
860 sdata->vif.p2p = false;
861 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
862 sdata->wdev.iftype = type;
863
864 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
865 sdata->control_port_no_encrypt = false;
866
867 /* only monitor differs */
868 sdata->dev->type = ARPHRD_ETHER;
869
870 skb_queue_head_init(&sdata->skb_queue);
871 INIT_WORK(&sdata->work, ieee80211_iface_work);
872
873 switch (type) {
874 case NL80211_IFTYPE_P2P_GO:
875 type = NL80211_IFTYPE_AP;
876 sdata->vif.type = type;
877 sdata->vif.p2p = true;
878 /* fall through */
879 case NL80211_IFTYPE_AP:
880 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
881 INIT_LIST_HEAD(&sdata->u.ap.vlans);
882 break;
883 case NL80211_IFTYPE_P2P_CLIENT:
884 type = NL80211_IFTYPE_STATION;
885 sdata->vif.type = type;
886 sdata->vif.p2p = true;
887 /* fall through */
888 case NL80211_IFTYPE_STATION:
889 ieee80211_sta_setup_sdata(sdata);
890 break;
891 case NL80211_IFTYPE_ADHOC:
892 ieee80211_ibss_setup_sdata(sdata);
893 break;
894 case NL80211_IFTYPE_MESH_POINT:
895 if (ieee80211_vif_is_mesh(&sdata->vif))
896 ieee80211_mesh_init_sdata(sdata);
897 break;
898 case NL80211_IFTYPE_MONITOR:
899 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
900 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
901 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
902 MONITOR_FLAG_OTHER_BSS;
903 break;
904 case NL80211_IFTYPE_WDS:
905 case NL80211_IFTYPE_AP_VLAN:
906 break;
907 case NL80211_IFTYPE_UNSPECIFIED:
908 case NUM_NL80211_IFTYPES:
909 BUG();
910 break;
911 }
912
913 ieee80211_debugfs_add_netdev(sdata);
914 }
915
916 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
917 enum nl80211_iftype type)
918 {
919 struct ieee80211_local *local = sdata->local;
920 int ret, err;
921 enum nl80211_iftype internal_type = type;
922 bool p2p = false;
923
924 ASSERT_RTNL();
925
926 if (!local->ops->change_interface)
927 return -EBUSY;
928
929 switch (sdata->vif.type) {
930 case NL80211_IFTYPE_AP:
931 case NL80211_IFTYPE_STATION:
932 case NL80211_IFTYPE_ADHOC:
933 /*
934 * Could maybe also all others here?
935 * Just not sure how that interacts
936 * with the RX/config path e.g. for
937 * mesh.
938 */
939 break;
940 default:
941 return -EBUSY;
942 }
943
944 switch (type) {
945 case NL80211_IFTYPE_AP:
946 case NL80211_IFTYPE_STATION:
947 case NL80211_IFTYPE_ADHOC:
948 /*
949 * Could probably support everything
950 * but WDS here (WDS do_open can fail
951 * under memory pressure, which this
952 * code isn't prepared to handle).
953 */
954 break;
955 case NL80211_IFTYPE_P2P_CLIENT:
956 p2p = true;
957 internal_type = NL80211_IFTYPE_STATION;
958 break;
959 case NL80211_IFTYPE_P2P_GO:
960 p2p = true;
961 internal_type = NL80211_IFTYPE_AP;
962 break;
963 default:
964 return -EBUSY;
965 }
966
967 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
968 if (ret)
969 return ret;
970
971 ieee80211_do_stop(sdata, false);
972
973 ieee80211_teardown_sdata(sdata->dev);
974
975 ret = drv_change_interface(local, sdata, internal_type, p2p);
976 if (ret)
977 type = sdata->vif.type;
978
979 ieee80211_setup_sdata(sdata, type);
980
981 err = ieee80211_do_open(sdata->dev, false);
982 WARN(err, "type change: do_open returned %d", err);
983
984 return ret;
985 }
986
987 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
988 enum nl80211_iftype type)
989 {
990 int ret;
991
992 ASSERT_RTNL();
993
994 if (type == ieee80211_vif_type_p2p(&sdata->vif))
995 return 0;
996
997 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
998 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
999 type == NL80211_IFTYPE_ADHOC)
1000 return -EOPNOTSUPP;
1001
1002 if (ieee80211_sdata_running(sdata)) {
1003 ret = ieee80211_runtime_change_iftype(sdata, type);
1004 if (ret)
1005 return ret;
1006 } else {
1007 /* Purge and reset type-dependent state. */
1008 ieee80211_teardown_sdata(sdata->dev);
1009 ieee80211_setup_sdata(sdata, type);
1010 }
1011
1012 /* reset some values that shouldn't be kept across type changes */
1013 sdata->vif.bss_conf.basic_rates =
1014 ieee80211_mandatory_rates(sdata->local,
1015 sdata->local->hw.conf.channel->band);
1016 sdata->drop_unencrypted = 0;
1017 if (type == NL80211_IFTYPE_STATION)
1018 sdata->u.mgd.use_4addr = false;
1019
1020 return 0;
1021 }
1022
1023 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1024 struct net_device *dev,
1025 enum nl80211_iftype type)
1026 {
1027 struct ieee80211_sub_if_data *sdata;
1028 u64 mask, start, addr, val, inc;
1029 u8 *m;
1030 u8 tmp_addr[ETH_ALEN];
1031 int i;
1032
1033 /* default ... something at least */
1034 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1035
1036 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1037 local->hw.wiphy->n_addresses <= 1)
1038 return;
1039
1040
1041 mutex_lock(&local->iflist_mtx);
1042
1043 switch (type) {
1044 case NL80211_IFTYPE_MONITOR:
1045 /* doesn't matter */
1046 break;
1047 case NL80211_IFTYPE_WDS:
1048 case NL80211_IFTYPE_AP_VLAN:
1049 /* match up with an AP interface */
1050 list_for_each_entry(sdata, &local->interfaces, list) {
1051 if (sdata->vif.type != NL80211_IFTYPE_AP)
1052 continue;
1053 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1054 break;
1055 }
1056 /* keep default if no AP interface present */
1057 break;
1058 default:
1059 /* assign a new address if possible -- try n_addresses first */
1060 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1061 bool used = false;
1062
1063 list_for_each_entry(sdata, &local->interfaces, list) {
1064 if (memcmp(local->hw.wiphy->addresses[i].addr,
1065 sdata->vif.addr, ETH_ALEN) == 0) {
1066 used = true;
1067 break;
1068 }
1069 }
1070
1071 if (!used) {
1072 memcpy(dev->perm_addr,
1073 local->hw.wiphy->addresses[i].addr,
1074 ETH_ALEN);
1075 break;
1076 }
1077 }
1078
1079 /* try mask if available */
1080 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1081 break;
1082
1083 m = local->hw.wiphy->addr_mask;
1084 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1085 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1086 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1087
1088 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1089 /* not a contiguous mask ... not handled now! */
1090 printk(KERN_DEBUG "not contiguous\n");
1091 break;
1092 }
1093
1094 m = local->hw.wiphy->perm_addr;
1095 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1096 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1097 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1098
1099 inc = 1ULL<<__ffs64(mask);
1100 val = (start & mask);
1101 addr = (start & ~mask) | (val & mask);
1102 do {
1103 bool used = false;
1104
1105 tmp_addr[5] = addr >> 0*8;
1106 tmp_addr[4] = addr >> 1*8;
1107 tmp_addr[3] = addr >> 2*8;
1108 tmp_addr[2] = addr >> 3*8;
1109 tmp_addr[1] = addr >> 4*8;
1110 tmp_addr[0] = addr >> 5*8;
1111
1112 val += inc;
1113
1114 list_for_each_entry(sdata, &local->interfaces, list) {
1115 if (memcmp(tmp_addr, sdata->vif.addr,
1116 ETH_ALEN) == 0) {
1117 used = true;
1118 break;
1119 }
1120 }
1121
1122 if (!used) {
1123 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1124 break;
1125 }
1126 addr = (start & ~mask) | (val & mask);
1127 } while (addr != start);
1128
1129 break;
1130 }
1131
1132 mutex_unlock(&local->iflist_mtx);
1133 }
1134
1135 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1136 struct net_device **new_dev, enum nl80211_iftype type,
1137 struct vif_params *params)
1138 {
1139 struct net_device *ndev;
1140 struct ieee80211_sub_if_data *sdata = NULL;
1141 int ret, i;
1142
1143 ASSERT_RTNL();
1144
1145 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1146 name, ieee80211_if_setup, local->hw.queues);
1147 if (!ndev)
1148 return -ENOMEM;
1149 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1150
1151 ndev->needed_headroom = local->tx_headroom +
1152 4*6 /* four MAC addresses */
1153 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1154 + 6 /* mesh */
1155 + 8 /* rfc1042/bridge tunnel */
1156 - ETH_HLEN /* ethernet hard_header_len */
1157 + IEEE80211_ENCRYPT_HEADROOM;
1158 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1159
1160 ret = dev_alloc_name(ndev, ndev->name);
1161 if (ret < 0)
1162 goto fail;
1163
1164 ieee80211_assign_perm_addr(local, ndev, type);
1165 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1166 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1167
1168 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1169 sdata = netdev_priv(ndev);
1170 ndev->ieee80211_ptr = &sdata->wdev;
1171 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1172 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1173
1174 /* initialise type-independent data */
1175 sdata->wdev.wiphy = local->hw.wiphy;
1176 sdata->local = local;
1177 sdata->dev = ndev;
1178 #ifdef CONFIG_INET
1179 sdata->arp_filter_state = true;
1180 #endif
1181
1182 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1183 skb_queue_head_init(&sdata->fragments[i].skb_list);
1184
1185 INIT_LIST_HEAD(&sdata->key_list);
1186
1187 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1188 struct ieee80211_supported_band *sband;
1189 sband = local->hw.wiphy->bands[i];
1190 sdata->rc_rateidx_mask[i] =
1191 sband ? (1 << sband->n_bitrates) - 1 : 0;
1192 }
1193
1194 /* setup type-dependent data */
1195 ieee80211_setup_sdata(sdata, type);
1196
1197 if (params) {
1198 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1199 if (type == NL80211_IFTYPE_STATION)
1200 sdata->u.mgd.use_4addr = params->use_4addr;
1201 }
1202
1203 ret = register_netdevice(ndev);
1204 if (ret)
1205 goto fail;
1206
1207 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1208 params && params->mesh_id_len)
1209 ieee80211_sdata_set_mesh_id(sdata,
1210 params->mesh_id_len,
1211 params->mesh_id);
1212
1213 mutex_lock(&local->iflist_mtx);
1214 list_add_tail_rcu(&sdata->list, &local->interfaces);
1215 mutex_unlock(&local->iflist_mtx);
1216
1217 if (new_dev)
1218 *new_dev = ndev;
1219
1220 return 0;
1221
1222 fail:
1223 free_netdev(ndev);
1224 return ret;
1225 }
1226
1227 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1228 {
1229 ASSERT_RTNL();
1230
1231 mutex_lock(&sdata->local->iflist_mtx);
1232 list_del_rcu(&sdata->list);
1233 mutex_unlock(&sdata->local->iflist_mtx);
1234
1235 synchronize_rcu();
1236 unregister_netdevice(sdata->dev);
1237 }
1238
1239 /*
1240 * Remove all interfaces, may only be called at hardware unregistration
1241 * time because it doesn't do RCU-safe list removals.
1242 */
1243 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1244 {
1245 struct ieee80211_sub_if_data *sdata, *tmp;
1246 LIST_HEAD(unreg_list);
1247
1248 ASSERT_RTNL();
1249
1250 mutex_lock(&local->iflist_mtx);
1251 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1252 list_del(&sdata->list);
1253
1254 unregister_netdevice_queue(sdata->dev, &unreg_list);
1255 }
1256 mutex_unlock(&local->iflist_mtx);
1257 unregister_netdevice_many(&unreg_list);
1258 }
1259
1260 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1261 const char *reason)
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 no longer idle - %s\n", reason);
1268 #endif
1269
1270 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1271 return IEEE80211_CONF_CHANGE_IDLE;
1272 }
1273
1274 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1275 {
1276 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1277 return 0;
1278
1279 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1280 wiphy_debug(local->hw.wiphy, "device now idle\n");
1281 #endif
1282
1283 drv_flush(local, false);
1284
1285 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1286 return IEEE80211_CONF_CHANGE_IDLE;
1287 }
1288
1289 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1290 {
1291 struct ieee80211_sub_if_data *sdata;
1292 int count = 0;
1293 bool working = false, scanning = false;
1294 struct ieee80211_work *wk;
1295
1296 #ifdef CONFIG_PROVE_LOCKING
1297 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1298 !lockdep_is_held(&local->iflist_mtx));
1299 #endif
1300 lockdep_assert_held(&local->mtx);
1301
1302 list_for_each_entry(sdata, &local->interfaces, list) {
1303 if (!ieee80211_sdata_running(sdata)) {
1304 sdata->vif.bss_conf.idle = true;
1305 continue;
1306 }
1307
1308 sdata->old_idle = sdata->vif.bss_conf.idle;
1309
1310 /* do not count disabled managed interfaces */
1311 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1312 !sdata->u.mgd.associated) {
1313 sdata->vif.bss_conf.idle = true;
1314 continue;
1315 }
1316 /* do not count unused IBSS interfaces */
1317 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1318 !sdata->u.ibss.ssid_len) {
1319 sdata->vif.bss_conf.idle = true;
1320 continue;
1321 }
1322 /* count everything else */
1323 count++;
1324 }
1325
1326 list_for_each_entry(wk, &local->work_list, list) {
1327 working = true;
1328 wk->sdata->vif.bss_conf.idle = false;
1329 }
1330
1331 if (local->scan_sdata) {
1332 scanning = true;
1333 local->scan_sdata->vif.bss_conf.idle = false;
1334 }
1335
1336 list_for_each_entry(sdata, &local->interfaces, list) {
1337 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1338 continue;
1339 if (!ieee80211_sdata_running(sdata))
1340 continue;
1341 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1342 }
1343
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 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree