blob: b7c8a4484298bc0c19f546440e33ae88ce1b8210 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
Johannes Berg0d143fe2008-09-11 00:01:59 +02002 * Interface handling (except master interface)
3 *
Jiri Bencf0706e82007-05-05 11:45:53 -07004 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
Johannes Berg75636522008-07-09 14:40:35 +02007 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
Jiri Bencf0706e82007-05-05 11:45:53 -07008 *
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/kernel.h>
14#include <linux/if_arp.h>
15#include <linux/netdevice.h>
16#include <linux/rtnetlink.h>
17#include <net/mac80211.h>
18#include "ieee80211_i.h"
19#include "sta_info.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070020#include "debugfs_netdev.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010021#include "mesh.h"
Johannes Berg0d143fe2008-09-11 00:01:59 +020022#include "led.h"
Johannes Berg24487982009-04-23 18:52:52 +020023#include "driver-ops.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070024
Johannes Bergc771c9d2009-01-23 22:54:03 +010025/**
26 * DOC: Interface list locking
27 *
28 * The interface list in each struct ieee80211_local is protected
29 * three-fold:
30 *
31 * (1) modifications may only be done under the RTNL
32 * (2) modifications and readers are protected against each other by
33 * the iflist_mtx.
34 * (3) modifications are done in an RCU manner so atomic readers
35 * can traverse the list in RCU-safe blocks.
36 *
37 * As a consequence, reads (traversals) of the list can be protected
38 * by either the RTNL, the iflist_mtx or RCU.
39 */
40
41
Johannes Berg0d143fe2008-09-11 00:01:59 +020042static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
43{
44 int meshhdrlen;
45 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
46
47 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
48
49 /* FIX: what would be proper limits for MTU?
50 * This interface uses 802.3 frames. */
51 if (new_mtu < 256 ||
52 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
53 return -EINVAL;
54 }
55
56#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
57 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
58#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
59 dev->mtu = new_mtu;
60 return 0;
61}
62
63static inline int identical_mac_addr_allowed(int type1, int type2)
64{
65 return type1 == NL80211_IFTYPE_MONITOR ||
66 type2 == NL80211_IFTYPE_MONITOR ||
67 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
68 (type1 == NL80211_IFTYPE_WDS &&
69 (type2 == NL80211_IFTYPE_WDS ||
70 type2 == NL80211_IFTYPE_AP)) ||
71 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
72 (type1 == NL80211_IFTYPE_AP_VLAN &&
73 (type2 == NL80211_IFTYPE_AP ||
74 type2 == NL80211_IFTYPE_AP_VLAN));
75}
76
77static int ieee80211_open(struct net_device *dev)
78{
Johannes Bergb4a4bf52008-09-26 13:34:54 +020079 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
80 struct ieee80211_sub_if_data *nsdata;
81 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +020082 struct sta_info *sta;
83 struct ieee80211_if_init_conf conf;
84 u32 changed = 0;
85 int res;
Johannes Berge8975582008-10-09 12:18:51 +020086 u32 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +020087 u8 null_addr[ETH_ALEN] = {0};
88
Johannes Berg0d143fe2008-09-11 00:01:59 +020089 /* fail early if user set an invalid address */
90 if (compare_ether_addr(dev->dev_addr, null_addr) &&
91 !is_valid_ether_addr(dev->dev_addr))
92 return -EADDRNOTAVAIL;
93
94 /* we hold the RTNL here so can safely walk the list */
95 list_for_each_entry(nsdata, &local->interfaces, list) {
96 struct net_device *ndev = nsdata->dev;
97
98 if (ndev != dev && netif_running(ndev)) {
99 /*
100 * Allow only a single IBSS interface to be up at any
101 * time. This is restricted because beacon distribution
102 * cannot work properly if both are in the same IBSS.
103 *
104 * To remove this restriction we'd have to disallow them
105 * from setting the same SSID on different IBSS interfaces
106 * belonging to the same hardware. Then, however, we're
107 * faced with having to adopt two different TSF timers...
108 */
109 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
110 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
111 return -EBUSY;
112
113 /*
114 * The remaining checks are only performed for interfaces
115 * with the same MAC address.
116 */
117 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
118 continue;
119
120 /*
121 * check whether it may have the same address
122 */
123 if (!identical_mac_addr_allowed(sdata->vif.type,
124 nsdata->vif.type))
125 return -ENOTUNIQ;
126
127 /*
128 * can only add VLANs to enabled APs
129 */
130 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
131 nsdata->vif.type == NL80211_IFTYPE_AP)
132 sdata->bss = &nsdata->u.ap;
133 }
134 }
135
136 switch (sdata->vif.type) {
137 case NL80211_IFTYPE_WDS:
138 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
139 return -ENOLINK;
140 break;
141 case NL80211_IFTYPE_AP_VLAN:
142 if (!sdata->bss)
143 return -ENOLINK;
144 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
145 break;
146 case NL80211_IFTYPE_AP:
147 sdata->bss = &sdata->u.ap;
148 break;
149 case NL80211_IFTYPE_MESH_POINT:
150 if (!ieee80211_vif_is_mesh(&sdata->vif))
151 break;
152 /* mesh ifaces must set allmulti to forward mcast traffic */
153 atomic_inc(&local->iff_allmultis);
154 break;
155 case NL80211_IFTYPE_STATION:
156 case NL80211_IFTYPE_MONITOR:
157 case NL80211_IFTYPE_ADHOC:
158 /* no special treatment */
159 break;
160 case NL80211_IFTYPE_UNSPECIFIED:
161 case __NL80211_IFTYPE_AFTER_LAST:
162 /* cannot happen */
163 WARN_ON(1);
164 break;
165 }
166
167 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200168 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200169 if (res)
170 goto err_del_bss;
Johannes Berge8975582008-10-09 12:18:51 +0200171 /* we're brought up, everything changes */
172 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200173 ieee80211_led_radio(local, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200174 }
175
176 /*
177 * Check all interfaces and copy the hopefully now-present
178 * MAC address to those that have the special null one.
179 */
180 list_for_each_entry(nsdata, &local->interfaces, list) {
181 struct net_device *ndev = nsdata->dev;
182
183 /*
184 * No need to check netif_running since we do not allow
185 * it to start up with this invalid address.
186 */
187 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
188 memcpy(ndev->dev_addr,
189 local->hw.wiphy->perm_addr,
190 ETH_ALEN);
191 }
192
193 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
194 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
195 ETH_ALEN);
196
197 /*
198 * Validate the MAC address for this device.
199 */
200 if (!is_valid_ether_addr(dev->dev_addr)) {
Johannes Berg24487982009-04-23 18:52:52 +0200201 if (!local->open_count)
202 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200203 return -EADDRNOTAVAIL;
204 }
205
206 switch (sdata->vif.type) {
207 case NL80211_IFTYPE_AP_VLAN:
208 /* no need to tell driver */
209 break;
210 case NL80211_IFTYPE_MONITOR:
211 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
212 local->cooked_mntrs++;
213 break;
214 }
215
216 /* must be before the call to ieee80211_configure_filter */
217 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200218 if (local->monitors == 1) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200219 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
Johannes Berge8975582008-10-09 12:18:51 +0200220 hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP;
221 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200222
223 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
224 local->fif_fcsfail++;
225 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
226 local->fif_plcpfail++;
227 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
228 local->fif_control++;
229 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
230 local->fif_other_bss++;
231
232 netif_addr_lock_bh(local->mdev);
233 ieee80211_configure_filter(local);
234 netif_addr_unlock_bh(local->mdev);
235 break;
236 case NL80211_IFTYPE_STATION:
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200237 sdata->u.mgd.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200238 /* fall through */
239 default:
240 conf.vif = &sdata->vif;
241 conf.type = sdata->vif.type;
242 conf.mac_addr = dev->dev_addr;
Johannes Berg24487982009-04-23 18:52:52 +0200243 res = drv_add_interface(local, &conf);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200244 if (res)
245 goto err_stop;
246
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700247 if (ieee80211_vif_is_mesh(&sdata->vif)) {
248 local->fif_other_bss++;
249 netif_addr_lock_bh(local->mdev);
250 ieee80211_configure_filter(local);
251 netif_addr_unlock_bh(local->mdev);
252
Johannes Berg0d143fe2008-09-11 00:01:59 +0200253 ieee80211_start_mesh(sdata);
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700254 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200255 changed |= ieee80211_reset_erp_info(sdata);
256 ieee80211_bss_info_change_notify(sdata, changed);
257 ieee80211_enable_keys(sdata);
258
Johannes Berg7986cf92009-03-21 17:08:43 +0100259 if (sdata->vif.type == NL80211_IFTYPE_STATION)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200260 netif_carrier_off(dev);
261 else
262 netif_carrier_on(dev);
263 }
264
265 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
266 /* Create STA entry for the WDS peer */
267 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
268 GFP_KERNEL);
269 if (!sta) {
270 res = -ENOMEM;
271 goto err_del_interface;
272 }
273
274 /* no locking required since STA is not live yet */
275 sta->flags |= WLAN_STA_AUTHORIZED;
276
277 res = sta_info_insert(sta);
278 if (res) {
279 /* STA has been freed */
280 goto err_del_interface;
281 }
282 }
283
284 if (local->open_count == 0) {
285 res = dev_open(local->mdev);
286 WARN_ON(res);
287 if (res)
288 goto err_del_interface;
289 tasklet_enable(&local->tx_pending_tasklet);
290 tasklet_enable(&local->tasklet);
291 }
292
293 /*
294 * set_multicast_list will be invoked by the networking core
295 * which will check whether any increments here were done in
296 * error and sync them down to the hardware as filter flags.
297 */
298 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
299 atomic_inc(&local->iff_allmultis);
300
301 if (sdata->flags & IEEE80211_SDATA_PROMISC)
302 atomic_inc(&local->iff_promiscs);
303
Johannes Berg5cff20e2009-04-29 12:26:17 +0200304 hw_reconf_flags |= __ieee80211_recalc_idle(local);
305
Johannes Berg0d143fe2008-09-11 00:01:59 +0200306 local->open_count++;
Johannes Berge8975582008-10-09 12:18:51 +0200307 if (hw_reconf_flags) {
308 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200309 /*
310 * set default queue parameters so drivers don't
311 * need to initialise the hardware if the hardware
312 * doesn't start up with sane defaults
313 */
314 ieee80211_set_wmm_default(sdata);
315 }
316
Johannes Berg10f644a2009-04-16 13:17:25 +0200317 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200318
Johannes Berg0d143fe2008-09-11 00:01:59 +0200319 /*
320 * ieee80211_sta_work is disabled while network interface
321 * is down. Therefore, some configuration changes may not
322 * yet be effective. Trigger execution of ieee80211_sta_work
323 * to fix this.
324 */
Johannes Berg46900292009-02-15 12:44:28 +0100325 if (sdata->vif.type == NL80211_IFTYPE_STATION)
326 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200327
328 netif_tx_start_all_queues(dev);
329
330 return 0;
331 err_del_interface:
Johannes Berg24487982009-04-23 18:52:52 +0200332 drv_remove_interface(local, &conf);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200333 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200334 if (!local->open_count)
335 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200336 err_del_bss:
337 sdata->bss = NULL;
338 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
339 list_del(&sdata->u.vlan.list);
340 return res;
341}
342
343static int ieee80211_stop(struct net_device *dev)
344{
345 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
346 struct ieee80211_local *local = sdata->local;
347 struct ieee80211_if_init_conf conf;
348 struct sta_info *sta;
Johannes Berge8975582008-10-09 12:18:51 +0200349 u32 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200350
351 /*
352 * Stop TX on this interface first.
353 */
354 netif_tx_stop_all_queues(dev);
355
356 /*
357 * Now delete all active aggregation sessions.
358 */
359 rcu_read_lock();
360
361 list_for_each_entry_rcu(sta, &local->sta_list, list) {
362 if (sta->sdata == sdata)
Johannes Berg2dace102009-02-10 21:25:52 +0100363 ieee80211_sta_tear_down_BA_sessions(sta);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200364 }
365
366 rcu_read_unlock();
367
368 /*
Herton Ronaldo Krzesinski1a28c782009-03-10 10:11:09 -0300369 * Announce that we are leaving the network, in case we are a
370 * station interface type. This must be done before removing
371 * all stations associated with sta_info_flush, otherwise STA
372 * information will be gone and no announce being done.
373 */
374 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
375 if (sdata->u.mgd.state != IEEE80211_STA_MLME_DISABLED)
376 ieee80211_sta_deauthenticate(sdata,
377 WLAN_REASON_DEAUTH_LEAVING);
378 }
379
380 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200381 * Remove all stations associated with this interface.
382 *
383 * This must be done before calling ops->remove_interface()
384 * because otherwise we can later invoke ops->sta_notify()
385 * whenever the STAs are removed, and that invalidates driver
386 * assumptions about always getting a vif pointer that is valid
387 * (because if we remove a STA after ops->remove_interface()
388 * the driver will have removed the vif info already!)
389 *
390 * We could relax this and only unlink the stations from the
391 * hash table and list but keep them on a per-sdata list that
392 * will be inserted back again when the interface is brought
393 * up again, but I don't currently see a use case for that,
394 * except with WDS which gets a STA entry created when it is
395 * brought up.
396 */
397 sta_info_flush(local, sdata);
398
399 /*
400 * Don't count this interface for promisc/allmulti while it
401 * is down. dev_mc_unsync() will invoke set_multicast_list
402 * on the master interface which will sync these down to the
403 * hardware as filter flags.
404 */
405 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
406 atomic_dec(&local->iff_allmultis);
407
408 if (sdata->flags & IEEE80211_SDATA_PROMISC)
409 atomic_dec(&local->iff_promiscs);
410
411 dev_mc_unsync(local->mdev, dev);
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800412 del_timer_sync(&local->dynamic_ps_timer);
413 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200414
415 /* APs need special treatment */
416 if (sdata->vif.type == NL80211_IFTYPE_AP) {
417 struct ieee80211_sub_if_data *vlan, *tmp;
418 struct beacon_data *old_beacon = sdata->u.ap.beacon;
419
420 /* remove beacon */
421 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
422 synchronize_rcu();
423 kfree(old_beacon);
424
425 /* down all dependent devices, that is VLANs */
426 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
427 u.vlan.list)
428 dev_close(vlan->dev);
429 WARN_ON(!list_empty(&sdata->u.ap.vlans));
430 }
431
432 local->open_count--;
433
434 switch (sdata->vif.type) {
435 case NL80211_IFTYPE_AP_VLAN:
436 list_del(&sdata->u.vlan.list);
437 /* no need to tell driver */
438 break;
439 case NL80211_IFTYPE_MONITOR:
440 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
441 local->cooked_mntrs--;
442 break;
443 }
444
445 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200446 if (local->monitors == 0) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200447 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
Johannes Berge8975582008-10-09 12:18:51 +0200448 hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP;
449 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200450
451 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
452 local->fif_fcsfail--;
453 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
454 local->fif_plcpfail--;
455 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
456 local->fif_control--;
457 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
458 local->fif_other_bss--;
459
460 netif_addr_lock_bh(local->mdev);
461 ieee80211_configure_filter(local);
462 netif_addr_unlock_bh(local->mdev);
463 break;
464 case NL80211_IFTYPE_STATION:
Johannes Berg46900292009-02-15 12:44:28 +0100465 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
466 del_timer_sync(&sdata->u.mgd.chswitch_timer);
467 del_timer_sync(&sdata->u.mgd.timer);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200468 /*
469 * If the timer fired while we waited for it, it will have
470 * requeued the work. Now the work will be running again
471 * but will not rearm the timer again because it checks
472 * whether the interface is running, which, at this point,
473 * it no longer is.
474 */
Johannes Berg46900292009-02-15 12:44:28 +0100475 cancel_work_sync(&sdata->u.mgd.work);
476 cancel_work_sync(&sdata->u.mgd.chswitch_work);
Kalle Valo04de8382009-03-22 21:57:35 +0200477
478 cancel_work_sync(&sdata->u.mgd.beacon_loss_work);
479
Johannes Berg0d143fe2008-09-11 00:01:59 +0200480 /*
481 * When we get here, the interface is marked down.
482 * Call synchronize_rcu() to wait for the RX path
483 * should it be using the interface and enqueuing
484 * frames at this very time on another CPU.
485 */
486 synchronize_rcu();
Johannes Berg46900292009-02-15 12:44:28 +0100487 skb_queue_purge(&sdata->u.mgd.skb_queue);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200488
Johannes Berg46900292009-02-15 12:44:28 +0100489 sdata->u.mgd.flags &= ~(IEEE80211_STA_PRIVACY_INVOKED |
Vasanthakumar Thiagarajaneb469362008-12-23 21:30:50 +0530490 IEEE80211_STA_TKIP_WEP_USED);
Johannes Berg46900292009-02-15 12:44:28 +0100491 kfree(sdata->u.mgd.extra_ie);
492 sdata->u.mgd.extra_ie = NULL;
493 sdata->u.mgd.extra_ie_len = 0;
494 /* fall through */
495 case NL80211_IFTYPE_ADHOC:
496 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +0100497 del_timer_sync(&sdata->u.ibss.timer);
498 cancel_work_sync(&sdata->u.ibss.work);
499 synchronize_rcu();
500 skb_queue_purge(&sdata->u.ibss.skb_queue);
501 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200502 /* fall through */
503 case NL80211_IFTYPE_MESH_POINT:
504 if (ieee80211_vif_is_mesh(&sdata->vif)) {
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700505 /* other_bss and allmulti are always set on mesh
506 * ifaces */
507 local->fif_other_bss--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200508 atomic_dec(&local->iff_allmultis);
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700509
510 netif_addr_lock_bh(local->mdev);
511 ieee80211_configure_filter(local);
512 netif_addr_unlock_bh(local->mdev);
513
Johannes Berg0d143fe2008-09-11 00:01:59 +0200514 ieee80211_stop_mesh(sdata);
515 }
516 /* fall through */
517 default:
518 if (local->scan_sdata == sdata) {
519 if (!local->ops->hw_scan)
520 cancel_delayed_work_sync(&local->scan_work);
521 /*
522 * The software scan can no longer run now, so we can
523 * clear out the scan_sdata reference. However, the
524 * hardware scan may still be running. The complete
525 * function must be prepared to handle a NULL value.
526 */
527 local->scan_sdata = NULL;
528 /*
529 * The memory barrier guarantees that another CPU
530 * that is hardware-scanning will now see the fact
531 * that this interface is gone.
532 */
533 smp_mb();
534 /*
535 * If software scanning, complete the scan but since
536 * the scan_sdata is NULL already don't send out a
537 * scan event to userspace -- the scan is incomplete.
538 */
539 if (local->sw_scanning)
Johannes Berg2a519312009-02-10 21:25:55 +0100540 ieee80211_scan_completed(&local->hw, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200541 }
542
543 conf.vif = &sdata->vif;
544 conf.type = sdata->vif.type;
545 conf.mac_addr = dev->dev_addr;
546 /* disable all keys for as long as this netdev is down */
547 ieee80211_disable_keys(sdata);
Johannes Berg24487982009-04-23 18:52:52 +0200548 drv_remove_interface(local, &conf);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200549 }
550
551 sdata->bss = NULL;
552
Johannes Berg5cff20e2009-04-29 12:26:17 +0200553 hw_reconf_flags |= __ieee80211_recalc_idle(local);
554
555 ieee80211_recalc_ps(local, -1);
556
Johannes Berg0d143fe2008-09-11 00:01:59 +0200557 if (local->open_count == 0) {
558 if (netif_running(local->mdev))
559 dev_close(local->mdev);
560
Johannes Berg24487982009-04-23 18:52:52 +0200561 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200562
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200563 ieee80211_led_radio(local, false);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200564
565 flush_workqueue(local->hw.workqueue);
566
567 tasklet_disable(&local->tx_pending_tasklet);
568 tasklet_disable(&local->tasklet);
Johannes Berge8975582008-10-09 12:18:51 +0200569
570 /* no reconfiguring after stop! */
571 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200572 }
573
Johannes Berge8975582008-10-09 12:18:51 +0200574 /* do after stop to avoid reconfiguring when we stop anyway */
575 if (hw_reconf_flags)
576 ieee80211_hw_config(local, hw_reconf_flags);
577
Johannes Berg0d143fe2008-09-11 00:01:59 +0200578 return 0;
579}
580
581static void ieee80211_set_multicast_list(struct net_device *dev)
582{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200583 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200584 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200585 int allmulti, promisc, sdata_allmulti, sdata_promisc;
586
587 allmulti = !!(dev->flags & IFF_ALLMULTI);
588 promisc = !!(dev->flags & IFF_PROMISC);
589 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
590 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
591
592 if (allmulti != sdata_allmulti) {
593 if (dev->flags & IFF_ALLMULTI)
594 atomic_inc(&local->iff_allmultis);
595 else
596 atomic_dec(&local->iff_allmultis);
597 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
598 }
599
600 if (promisc != sdata_promisc) {
601 if (dev->flags & IFF_PROMISC)
602 atomic_inc(&local->iff_promiscs);
603 else
604 atomic_dec(&local->iff_promiscs);
605 sdata->flags ^= IEEE80211_SDATA_PROMISC;
606 }
607
608 dev_mc_sync(local->mdev, dev);
609}
610
Johannes Berg75636522008-07-09 14:40:35 +0200611/*
612 * Called when the netdev is removed or, by the code below, before
613 * the interface type changes.
614 */
615static void ieee80211_teardown_sdata(struct net_device *dev)
Jiri Bencf0706e82007-05-05 11:45:53 -0700616{
Johannes Berg75636522008-07-09 14:40:35 +0200617 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
618 struct ieee80211_local *local = sdata->local;
619 struct beacon_data *beacon;
620 struct sk_buff *skb;
621 int flushed;
Jiri Bencf0706e82007-05-05 11:45:53 -0700622 int i;
623
Johannes Berg75636522008-07-09 14:40:35 +0200624 /* free extra data */
625 ieee80211_free_keys(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700626
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200627 ieee80211_debugfs_remove_netdev(sdata);
628
Johannes Berg988c0f72008-04-17 19:21:22 +0200629 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -0700630 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200631 sdata->fragment_next = 0;
632
633 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200634 case NL80211_IFTYPE_AP:
Johannes Berg75636522008-07-09 14:40:35 +0200635 beacon = sdata->u.ap.beacon;
636 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
637 synchronize_rcu();
638 kfree(beacon);
639
640 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
641 local->total_ps_buffered--;
642 dev_kfree_skb(skb);
643 }
644
645 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200646 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +0200647 if (ieee80211_vif_is_mesh(&sdata->vif))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200648 mesh_rmc_free(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200649 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200650 case NL80211_IFTYPE_ADHOC:
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200651 if (WARN_ON(sdata->u.ibss.presp))
652 kfree_skb(sdata->u.ibss.presp);
Johannes Berg46900292009-02-15 12:44:28 +0100653 break;
654 case NL80211_IFTYPE_STATION:
655 kfree(sdata->u.mgd.extra_ie);
656 kfree(sdata->u.mgd.assocreq_ies);
657 kfree(sdata->u.mgd.assocresp_ies);
Jouni Malinend7873cb2009-03-20 15:53:16 +0200658 kfree(sdata->u.mgd.sme_auth_ie);
Johannes Berg75636522008-07-09 14:40:35 +0200659 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200660 case NL80211_IFTYPE_WDS:
661 case NL80211_IFTYPE_AP_VLAN:
662 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +0200663 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200664 case NL80211_IFTYPE_UNSPECIFIED:
665 case __NL80211_IFTYPE_AFTER_LAST:
Johannes Berg75636522008-07-09 14:40:35 +0200666 BUG();
667 break;
668 }
669
670 flushed = sta_info_flush(local, sdata);
671 WARN_ON(flushed);
Jiri Bencf0706e82007-05-05 11:45:53 -0700672}
673
Johannes Berg587e7292009-01-30 13:35:22 +0100674static const struct net_device_ops ieee80211_dataif_ops = {
675 .ndo_open = ieee80211_open,
676 .ndo_stop = ieee80211_stop,
677 .ndo_uninit = ieee80211_teardown_sdata,
678 .ndo_start_xmit = ieee80211_subif_start_xmit,
679 .ndo_set_multicast_list = ieee80211_set_multicast_list,
680 .ndo_change_mtu = ieee80211_change_mtu,
681 .ndo_set_mac_address = eth_mac_addr,
682};
683
684static const struct net_device_ops ieee80211_monitorif_ops = {
685 .ndo_open = ieee80211_open,
686 .ndo_stop = ieee80211_stop,
687 .ndo_uninit = ieee80211_teardown_sdata,
688 .ndo_start_xmit = ieee80211_monitor_start_xmit,
689 .ndo_set_multicast_list = ieee80211_set_multicast_list,
690 .ndo_change_mtu = ieee80211_change_mtu,
691 .ndo_set_mac_address = eth_mac_addr,
692};
693
694static void ieee80211_if_setup(struct net_device *dev)
695{
696 ether_setup(dev);
697 dev->netdev_ops = &ieee80211_dataif_ops;
698 dev->wireless_handlers = &ieee80211_iw_handler_def;
699 dev->destructor = free_netdev;
700}
701
Johannes Berg75636522008-07-09 14:40:35 +0200702/*
703 * Helper function to initialise an interface to a specific type.
704 */
705static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200706 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200707{
Johannes Berg75636522008-07-09 14:40:35 +0200708 /* clear type-dependent union */
709 memset(&sdata->u, 0, sizeof(sdata->u));
710
711 /* and set some type-dependent values */
712 sdata->vif.type = type;
Johannes Berg587e7292009-01-30 13:35:22 +0100713 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg60719ff2008-09-16 14:55:09 +0200714 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +0200715
716 /* only monitor differs */
717 sdata->dev->type = ARPHRD_ETHER;
718
719 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200720 case NL80211_IFTYPE_AP:
Johannes Berg75636522008-07-09 14:40:35 +0200721 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
722 INIT_LIST_HEAD(&sdata->u.ap.vlans);
723 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200724 case NL80211_IFTYPE_STATION:
Johannes Berg9c6bd792008-09-11 00:01:52 +0200725 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200726 break;
Johannes Berg46900292009-02-15 12:44:28 +0100727 case NL80211_IFTYPE_ADHOC:
728 ieee80211_ibss_setup_sdata(sdata);
729 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200730 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +0200731 if (ieee80211_vif_is_mesh(&sdata->vif))
732 ieee80211_mesh_init_sdata(sdata);
733 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200734 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +0200735 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +0100736 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +0200737 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
738 MONITOR_FLAG_OTHER_BSS;
739 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200740 case NL80211_IFTYPE_WDS:
741 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg75636522008-07-09 14:40:35 +0200742 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200743 case NL80211_IFTYPE_UNSPECIFIED:
744 case __NL80211_IFTYPE_AFTER_LAST:
Johannes Berg75636522008-07-09 14:40:35 +0200745 BUG();
746 break;
747 }
748
749 ieee80211_debugfs_add_netdev(sdata);
750}
751
Johannes Bergf3947e22008-07-09 14:40:36 +0200752int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200753 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200754{
Johannes Bergf3947e22008-07-09 14:40:36 +0200755 ASSERT_RTNL();
756
757 if (type == sdata->vif.type)
758 return 0;
759
Johannes Berge60c7742008-11-26 23:31:40 +0100760 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
Pavel Roskindcebf452008-12-22 16:39:36 -0500761 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
762 type == NL80211_IFTYPE_ADHOC)
Johannes Berge60c7742008-11-26 23:31:40 +0100763 return -EOPNOTSUPP;
764
Johannes Bergf3947e22008-07-09 14:40:36 +0200765 /*
766 * We could, here, on changes between IBSS/STA/MESH modes,
767 * invoke an MLME function instead that disassociates etc.
768 * and goes into the requested mode.
769 */
770
771 if (netif_running(sdata->dev))
772 return -EBUSY;
773
Johannes Berg75636522008-07-09 14:40:35 +0200774 /* Purge and reset type-dependent state. */
775 ieee80211_teardown_sdata(sdata->dev);
776 ieee80211_setup_sdata(sdata, type);
777
778 /* reset some values that shouldn't be kept across type changes */
Johannes Bergbda39332008-10-11 01:51:51 +0200779 sdata->vif.bss_conf.basic_rates =
Johannes Berg96dd22a2008-09-11 00:01:57 +0200780 ieee80211_mandatory_rates(sdata->local,
781 sdata->local->hw.conf.channel->band);
Johannes Berg75636522008-07-09 14:40:35 +0200782 sdata->drop_unencrypted = 0;
Johannes Bergf3947e22008-07-09 14:40:36 +0200783
784 return 0;
Johannes Berg75636522008-07-09 14:40:35 +0200785}
786
Johannes Berg3e122be2008-07-09 14:40:34 +0200787int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg05c914f2008-09-11 00:01:58 +0200788 struct net_device **new_dev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +0100789 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -0700790{
791 struct net_device *ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -0700792 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +0200793 int ret, i;
Jiri Bencf0706e82007-05-05 11:45:53 -0700794
795 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +0200796
Johannes Berg32bfd352007-12-19 01:31:26 +0100797 ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
Jiri Bencf0706e82007-05-05 11:45:53 -0700798 name, ieee80211_if_setup);
799 if (!ndev)
800 return -ENOMEM;
801
Johannes Bergf3994ec2008-05-12 20:51:44 -0700802 ndev->needed_headroom = local->tx_headroom +
803 4*6 /* four MAC addresses */
804 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
805 + 6 /* mesh */
806 + 8 /* rfc1042/bridge tunnel */
807 - ETH_HLEN /* ethernet hard_header_len */
808 + IEEE80211_ENCRYPT_HEADROOM;
809 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
810
Jiri Bencf0706e82007-05-05 11:45:53 -0700811 ret = dev_alloc_name(ndev, ndev->name);
812 if (ret < 0)
813 goto fail;
814
815 memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700816 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
Johannes Berg076ae602009-02-11 20:27:30 +0100817 ndev->features |= NETIF_F_NETNS_LOCAL;
Jiri Bencf0706e82007-05-05 11:45:53 -0700818
Johannes Berg3e122be2008-07-09 14:40:34 +0200819 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
820 sdata = netdev_priv(ndev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700821 ndev->ieee80211_ptr = &sdata->wdev;
Johannes Berg75636522008-07-09 14:40:35 +0200822
823 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -0700824 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -0700825 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +0200826 sdata->dev = ndev;
827
828 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
829 skb_queue_head_init(&sdata->fragments[i].skb_list);
830
831 INIT_LIST_HEAD(&sdata->key_list);
832
833 sdata->force_unicast_rateidx = -1;
834 sdata->max_ratectrl_rateidx = -1;
835
836 /* setup type-dependent data */
837 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -0700838
839 ret = register_netdevice(ndev);
840 if (ret)
841 goto fail;
842
Johannes Berg902acc72008-02-23 15:17:19 +0100843 if (ieee80211_vif_is_mesh(&sdata->vif) &&
844 params && params->mesh_id_len)
Johannes Berg472dbc42008-09-11 00:01:49 +0200845 ieee80211_sdata_set_mesh_id(sdata,
846 params->mesh_id_len,
847 params->mesh_id);
Luis Carlos Coboee385852008-02-23 15:17:11 +0100848
Johannes Bergc771c9d2009-01-23 22:54:03 +0100849 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -0400850 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +0100851 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -0400852
Jiri Bencf0706e82007-05-05 11:45:53 -0700853 if (new_dev)
854 *new_dev = ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -0700855
Jiri Bencf0706e82007-05-05 11:45:53 -0700856 return 0;
857
Johannes Berg75636522008-07-09 14:40:35 +0200858 fail:
Jiri Bencf0706e82007-05-05 11:45:53 -0700859 free_netdev(ndev);
860 return ret;
861}
862
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200863void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -0700864{
Jiri Bencf0706e82007-05-05 11:45:53 -0700865 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -0400866
Johannes Bergc771c9d2009-01-23 22:54:03 +0100867 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +0200868 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +0100869 mutex_unlock(&sdata->local->iflist_mtx);
870
Johannes Berg75636522008-07-09 14:40:35 +0200871 synchronize_rcu();
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200872 unregister_netdevice(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700873}
874
Johannes Berg75636522008-07-09 14:40:35 +0200875/*
876 * Remove all interfaces, may only be called at hardware unregistration
877 * time because it doesn't do RCU-safe list removals.
878 */
879void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -0700880{
Johannes Berg75636522008-07-09 14:40:35 +0200881 struct ieee80211_sub_if_data *sdata, *tmp;
Jiri Bencf0706e82007-05-05 11:45:53 -0700882
883 ASSERT_RTNL();
884
Johannes Berg75636522008-07-09 14:40:35 +0200885 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
Johannes Bergc771c9d2009-01-23 22:54:03 +0100886 /*
887 * we cannot hold the iflist_mtx across unregister_netdevice,
888 * but we only need to hold it for list modifications to lock
889 * out readers since we're under the RTNL here as all other
890 * writers.
891 */
892 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +0200893 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +0100894 mutex_unlock(&local->iflist_mtx);
895
Johannes Berg75636522008-07-09 14:40:35 +0200896 unregister_netdevice(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700897 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700898}
Johannes Berg5cff20e2009-04-29 12:26:17 +0200899
900static u32 ieee80211_idle_off(struct ieee80211_local *local,
901 const char *reason)
902{
903 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
904 return 0;
905
906#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
907 printk(KERN_DEBUG "%s: device no longer idle - %s\n",
908 wiphy_name(local->hw.wiphy), reason);
909#endif
910
911 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
912 return IEEE80211_CONF_CHANGE_IDLE;
913}
914
915static u32 ieee80211_idle_on(struct ieee80211_local *local)
916{
917 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
918 return 0;
919
920#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
921 printk(KERN_DEBUG "%s: device now idle\n",
922 wiphy_name(local->hw.wiphy));
923#endif
924
925 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
926 return IEEE80211_CONF_CHANGE_IDLE;
927}
928
929u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
930{
931 struct ieee80211_sub_if_data *sdata;
932 int count = 0;
933
934 if (local->hw_scanning || local->sw_scanning)
935 return ieee80211_idle_off(local, "scanning");
936
937 list_for_each_entry(sdata, &local->interfaces, list) {
938 if (!netif_running(sdata->dev))
939 continue;
940 /* do not count disabled managed interfaces */
941 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
942 sdata->u.mgd.state == IEEE80211_STA_MLME_DISABLED)
943 continue;
944 /* do not count unused IBSS interfaces */
945 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
946 !sdata->u.ibss.ssid_len)
947 continue;
948 /* count everything else */
949 count++;
950 }
951
952 if (!count)
953 return ieee80211_idle_on(local);
954 else
955 return ieee80211_idle_off(local, "in use");
956
957 return 0;
958}
959
960void ieee80211_recalc_idle(struct ieee80211_local *local)
961{
962 u32 chg;
963
964 mutex_lock(&local->iflist_mtx);
965 chg = __ieee80211_recalc_idle(local);
966 mutex_unlock(&local->iflist_mtx);
Johannes Berg58905ca2009-05-07 14:23:01 +0200967 if (chg)
968 ieee80211_hw_config(local, chg);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200969}