blob: 7aa85591dbe764ca8b485759a94922ab4b58520b [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 */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070014#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>
Johannes Bergcf0277e2010-01-05 18:00:58 +010019#include <net/ieee80211_radiotap.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070020#include "ieee80211_i.h"
21#include "sta_info.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070022#include "debugfs_netdev.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010023#include "mesh.h"
Johannes Berg0d143fe2008-09-11 00:01:59 +020024#include "led.h"
Johannes Berg24487982009-04-23 18:52:52 +020025#include "driver-ops.h"
Johannes Bergcf0277e2010-01-05 18:00:58 +010026#include "wme.h"
Bill Jordan1be7fe82010-10-01 11:20:41 -040027#include "rate.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070028
Johannes Bergc771c9d2009-01-23 22:54:03 +010029/**
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
Johannes Berg0d143fe2008-09-11 00:01:59 +020046static 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
Johannes Berg47846c92009-11-25 17:46:19 +010067static int ieee80211_change_mac(struct net_device *dev, void *addr)
68{
69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Kalle Valofc5f7572009-12-30 15:54:03 +020070 struct sockaddr *sa = addr;
Johannes Berg47846c92009-11-25 17:46:19 +010071 int ret;
72
Johannes Berg9607e6b2009-12-23 13:15:31 +010073 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +010074 return -EBUSY;
75
Kalle Valofc5f7572009-12-30 15:54:03 +020076 ret = eth_mac_addr(dev, sa);
Johannes Berg47846c92009-11-25 17:46:19 +010077
78 if (ret == 0)
Kalle Valofc5f7572009-12-30 15:54:03 +020079 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +010080
81 return ret;
82}
83
Johannes Berg0d143fe2008-09-11 00:01:59 +020084static 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
Johannes Berg87490f62010-08-27 12:35:57 +020098static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
99 enum nl80211_iftype iftype)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200100{
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200101 struct ieee80211_local *local = sdata->local;
Johannes Berg87490f62010-08-27 12:35:57 +0200102 struct ieee80211_sub_if_data *nsdata;
103 struct net_device *dev = sdata->dev;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200104
Johannes Berg87490f62010-08-27 12:35:57 +0200105 ASSERT_RTNL();
Johannes Berg0d143fe2008-09-11 00:01:59 +0200106
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
Johannes Berg9607e6b2009-12-23 13:15:31 +0100111 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200112 /*
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 */
Johannes Berg87490f62010-08-27 12:35:57 +0200122 if (iftype == NL80211_IFTYPE_ADHOC &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200123 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 */
Johannes Berg87490f62010-08-27 12:35:57 +0200136 if (!identical_mac_addr_allowed(iftype,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200137 nsdata->vif.type))
138 return -ENOTUNIQ;
139
140 /*
141 * can only add VLANs to enabled APs
142 */
Johannes Berg87490f62010-08-27 12:35:57 +0200143 if (iftype == NL80211_IFTYPE_AP_VLAN &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200144 nsdata->vif.type == NL80211_IFTYPE_AP)
145 sdata->bss = &nsdata->u.ap;
146 }
147 }
148
Johannes Berg87490f62010-08-27 12:35:57 +0200149 return 0;
150}
151
Christian Lamparter85416a42010-10-02 13:17:07 +0200152void 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
Johannes Berg34d4bc42010-08-27 12:35:58 +0200172/*
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 */
177static int ieee80211_do_open(struct net_device *dev, bool coming_up)
Johannes Berg87490f62010-08-27 12:35:57 +0200178{
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
Johannes Berg0d143fe2008-09-11 00:01:59 +0200186 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:
Johannes Berg2e161f72010-08-12 15:38:38 +0200211 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200212 case NL80211_IFTYPE_P2P_CLIENT:
213 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200214 /* cannot happen */
215 WARN_ON(1);
216 break;
217 }
218
219 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200220 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200221 if (res)
222 goto err_del_bss;
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400223 if (local->ops->napi_poll)
224 napi_enable(&local->napi);
Johannes Berge8975582008-10-09 12:18:51 +0200225 /* we're brought up, everything changes */
226 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200227 ieee80211_led_radio(local, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200228 }
229
230 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200231 * Copy the hopefully now-present MAC address to
232 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200233 */
Johannes Bergbf533e02010-08-27 12:35:56 +0200234 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);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200239
Johannes Bergbf533e02010-08-27 12:35:56 +0200240 if (!is_valid_ether_addr(dev->dev_addr)) {
241 if (!local->open_count)
242 drv_stop(local);
243 return -EADDRNOTAVAIL;
John W. Linville0adc23f2009-10-06 16:27:18 -0400244 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200245 }
246
Johannes Berg0d143fe2008-09-11 00:01:59 +0200247 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++;
Johannes Berge8975582008-10-09 12:18:51 +0200259 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100260 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
261 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200262 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200263
Christian Lamparter85416a42010-10-02 13:17:07 +0200264 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200265 ieee80211_configure_filter(local);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200266
267 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200268 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200269 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200270 if (coming_up) {
271 res = drv_add_interface(local, &sdata->vif);
272 if (res)
273 goto err_stop;
274 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200275
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700276 if (ieee80211_vif_is_mesh(&sdata->vif)) {
277 local->fif_other_bss++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700278 ieee80211_configure_filter(local);
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700279
Johannes Berg0d143fe2008-09-11 00:01:59 +0200280 ieee80211_start_mesh(sdata);
Igor Perminove3b90ca2009-08-04 16:48:51 +0400281 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
282 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200283 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400284
Igor Perminove3b90ca2009-08-04 16:48:51 +0400285 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200286 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
287 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700288 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400289
Johannes Berg0d143fe2008-09-11 00:01:59 +0200290 changed |= ieee80211_reset_erp_info(sdata);
291 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200292
Johannes Berg7986cf92009-03-21 17:08:43 +0100293 if (sdata->vif.type == NL80211_IFTYPE_STATION)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200294 netif_carrier_off(dev);
295 else
296 netif_carrier_on(dev);
297 }
298
Johannes Berg2d2080c2010-09-15 15:13:13 +0200299 set_bit(SDATA_STATE_RUNNING, &sdata->state);
300
Johannes Berg0d143fe2008-09-11 00:01:59 +0200301 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 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400318
319 rate_control_rate_init(sta);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200320 }
321
Johannes Berg0d143fe2008-09-11 00:01:59 +0200322 /*
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
Johannes Berg7da7cc12010-08-05 17:02:38 +0200333 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200334 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200335 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200336
Johannes Berg34d4bc42010-08-27 12:35:58 +0200337 if (coming_up)
338 local->open_count++;
339
Johannes Berge8975582008-10-09 12:18:51 +0200340 if (hw_reconf_flags) {
341 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200342 /*
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
Johannes Berg10f644a2009-04-16 13:17:25 +0200350 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200351
John W. Linville8a5b33f2010-01-06 15:39:39 -0500352 netif_tx_start_all_queues(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200353
354 return 0;
355 err_del_interface:
Johannes Berg1ed32e42009-12-23 13:15:45 +0100356 drv_remove_interface(local, &sdata->vif);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200357 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200358 if (!local->open_count)
359 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200360 err_del_bss:
361 sdata->bss = NULL;
362 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
363 list_del(&sdata->u.vlan.list);
Johannes Berg2d2080c2010-09-15 15:13:13 +0200364 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200365 return res;
366}
367
Johannes Berg34d4bc42010-08-27 12:35:58 +0200368static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200369{
370 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200371 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
385static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
386 bool going_down)
387{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200388 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200389 unsigned long flags;
390 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200391 u32 hw_reconf_flags = 0;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200392 int i;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200393
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700394 if (local->scan_sdata == sdata)
395 ieee80211_scan_cancel(local);
396
Johannes Berg34d4bc42010-08-27 12:35:58 +0200397 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
398
Johannes Berg0d143fe2008-09-11 00:01:59 +0200399 /*
400 * Stop TX on this interface first.
401 */
Johannes Berg34d4bc42010-08-27 12:35:58 +0200402 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200403
404 /*
Johannes Bergaf6b6372009-12-23 13:15:35 +0100405 * Purge work for this interface.
406 */
407 ieee80211_work_purge(sdata);
408
409 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200410 * 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 *
Johannes Bergb9dcf712010-08-27 12:35:54 +0200419 * 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.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200422 */
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
Johannes Berg7be50862010-10-13 12:06:24 +0200437 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400438 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200439 local->fif_probe_req--;
440 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
441 local->fif_probe_req--;
442 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400443
Johannes Berg34d4bc42010-08-27 12:35:58 +0200444 netif_addr_lock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200445 spin_lock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200446 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
447 sdata->dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200448 spin_unlock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200449 netif_addr_unlock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200450
Johannes Berg3ac64be2009-08-17 16:16:53 +0200451 ieee80211_configure_filter(local);
452
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800453 del_timer_sync(&local->dynamic_ps_timer);
454 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200455
456 /* APs need special treatment */
457 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200458 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200459 struct beacon_data *old_beacon = sdata->u.ap.beacon;
460
Johannes Bergb9dcf712010-08-27 12:35:54 +0200461 /* sdata_running will return false, so this will disable */
462 ieee80211_bss_info_change_notify(sdata,
463 BSS_CHANGED_BEACON_ENABLED);
464
Johannes Berg0d143fe2008-09-11 00:01:59 +0200465 /* remove beacon */
466 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
467 synchronize_rcu();
468 kfree(old_beacon);
469
Johannes Bergb9dcf712010-08-27 12:35:54 +0200470 /* 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
Johannes Berg0d143fe2008-09-11 00:01:59 +0200476 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200477 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200478 u.vlan.list)
479 dev_close(vlan->dev);
480 WARN_ON(!list_empty(&sdata->u.ap.vlans));
481 }
482
Johannes Berg34d4bc42010-08-27 12:35:58 +0200483 if (going_down)
484 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200485
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--;
Johannes Berge8975582008-10-09 12:18:51 +0200498 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100499 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
500 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200501 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200502
Christian Lamparter85416a42010-10-02 13:17:07 +0200503 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200504 ieee80211_configure_filter(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200505 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200506 case NL80211_IFTYPE_MESH_POINT:
507 if (ieee80211_vif_is_mesh(&sdata->vif)) {
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700508 /* other_bss and allmulti are always set on mesh
509 * ifaces */
510 local->fif_other_bss--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200511 atomic_dec(&local->iff_allmultis);
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700512
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700513 ieee80211_configure_filter(local);
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700514
Johannes Berg0d143fe2008-09-11 00:01:59 +0200515 ieee80211_stop_mesh(sdata);
516 }
517 /* fall through */
518 default:
Johannes Bergc1475ca2010-06-10 10:21:37 +0200519 flush_work(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200520 /*
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
Bob Copeland97af7432009-07-29 10:13:03 +0200529 /*
Johannes Bergb9dcf712010-08-27 12:35:54 +0200530 * Disable beaconing here for mesh only, AP and IBSS
531 * are already taken care of.
Bob Copeland97af7432009-07-29 10:13:03 +0200532 */
Johannes Bergb9dcf712010-08-27 12:35:54 +0200533 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Bob Copeland97af7432009-07-29 10:13:03 +0200534 ieee80211_bss_info_change_notify(sdata,
535 BSS_CHANGED_BEACON_ENABLED);
Bob Copeland97af7432009-07-29 10:13:03 +0200536
Johannes Bergb9dcf712010-08-27 12:35:54 +0200537 /*
538 * Free all remaining keys, there shouldn't be any,
539 * except maybe group keys in AP more or WDS?
540 */
Johannes Bergad0e2b52010-06-01 10:19:19 +0200541 ieee80211_free_keys(sdata);
Johannes Bergb9dcf712010-08-27 12:35:54 +0200542
Johannes Berg34d4bc42010-08-27 12:35:58 +0200543 if (going_down)
544 drv_remove_interface(local, &sdata->vif);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200545 }
546
547 sdata->bss = NULL;
548
Johannes Berg7da7cc12010-08-05 17:02:38 +0200549 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200550 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200551 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200552
553 ieee80211_recalc_ps(local, -1);
554
Johannes Berg0d143fe2008-09-11 00:01:59 +0200555 if (local->open_count == 0) {
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400556 if (local->ops->napi_poll)
557 napi_disable(&local->napi);
Johannes Bergea77f122009-08-21 14:44:45 +0200558 ieee80211_clear_tx_pending(local);
Johannes Berg84f6a012009-08-20 20:02:20 +0200559 ieee80211_stop_device(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200560
Johannes Berge8975582008-10-09 12:18:51 +0200561 /* no reconfiguring after stop! */
562 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200563 }
564
Johannes Berge8975582008-10-09 12:18:51 +0200565 /* do after stop to avoid reconfiguring when we stop anyway */
566 if (hw_reconf_flags)
567 ieee80211_hw_config(local, hw_reconf_flags);
568
Johannes Berg5061b0c2009-07-14 00:33:34 +0200569 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);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200580}
581
582static 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);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200587
Johannes Berg0d143fe2008-09-11 00:01:59 +0200588 return 0;
589}
590
591static void ieee80211_set_multicast_list(struct net_device *dev)
592{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200593 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200594 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200595 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 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200617 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000618 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200619 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +0200620 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200621}
622
Johannes Berg75636522008-07-09 14:40:35 +0200623/*
624 * Called when the netdev is removed or, by the code below, before
625 * the interface type changes.
626 */
627static void ieee80211_teardown_sdata(struct net_device *dev)
Jiri Bencf0706e82007-05-05 11:45:53 -0700628{
Johannes Berg75636522008-07-09 14:40:35 +0200629 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
630 struct ieee80211_local *local = sdata->local;
Johannes Berg75636522008-07-09 14:40:35 +0200631 int flushed;
Jiri Bencf0706e82007-05-05 11:45:53 -0700632 int i;
633
Johannes Berg75636522008-07-09 14:40:35 +0200634 /* free extra data */
635 ieee80211_free_keys(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700636
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200637 ieee80211_debugfs_remove_netdev(sdata);
638
Johannes Berg988c0f72008-04-17 19:21:22 +0200639 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -0700640 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200641 sdata->fragment_next = 0;
642
Johannes Bergb9dcf712010-08-27 12:35:54 +0200643 if (ieee80211_vif_is_mesh(&sdata->vif))
644 mesh_rmc_free(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200645
646 flushed = sta_info_flush(local, sdata);
647 WARN_ON(flushed);
Jiri Bencf0706e82007-05-05 11:45:53 -0700648}
649
Johannes Bergcf0277e2010-01-05 18:00:58 +0100650static 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
Johannes Berg587e7292009-01-30 13:35:22 +0100656static 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,
Johannes Berg47846c92009-11-25 17:46:19 +0100663 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100664 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100665};
666
Johannes Bergcf0277e2010-01-05 18:00:58 +0100667static 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;
Felix Fietkau193e70e2010-01-11 06:47:00 +0100674 u8 *p;
Johannes Bergcf0277e2010-01-05 18:00:58 +0100675
676 if (local->hw.queues < 4)
677 return 0;
678
679 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +0100680 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +0100681 return 0; /* doesn't matter, frame will be dropped */
682
Johannes Bergb49bb572010-01-08 19:00:00 +0100683 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +0100684
Felix Fietkau861a57c2010-01-12 04:08:26 +0100685 if (!ieee80211_is_data(hdr->frame_control)) {
Johannes Bergcf0277e2010-01-05 18:00:58 +0100686 skb->priority = 7;
687 return ieee802_1d_to_ac[skb->priority];
688 }
Felix Fietkau861a57c2010-01-12 04:08:26 +0100689 if (!ieee80211_is_data_qos(hdr->frame_control)) {
690 skb->priority = 0;
691 return ieee802_1d_to_ac[skb->priority];
692 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100693
Felix Fietkau193e70e2010-01-11 06:47:00 +0100694 p = ieee80211_get_qos_ctl(hdr);
695 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
696
Johannes Bergcf0277e2010-01-05 18:00:58 +0100697 return ieee80211_downgrade_queue(local, skb);
698}
699
Johannes Berg587e7292009-01-30 13:35:22 +0100700static 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,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100708 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100709};
710
711static void ieee80211_if_setup(struct net_device *dev)
712{
713 ether_setup(dev);
714 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg587e7292009-01-30 13:35:22 +0100715 dev->destructor = free_netdev;
716}
717
Johannes Berg1fa57d02010-06-10 10:21:32 +0200718static 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;
Johannes Berg344eec62010-06-10 10:21:36 +0200724 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +0200725 struct ieee80211_ra_tid *ra_tid;
Johannes Berg1fa57d02010-06-10 10:21:32 +0200726
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))) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200743 struct ieee80211_mgmt *mgmt = (void *)skb->data;
744
Johannes Bergc1475ca2010-06-10 10:21:37 +0200745 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) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200755 int len = skb->len;
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200756
Johannes Berga93e3642010-06-10 10:21:46 +0200757 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200758 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200759 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 }
Johannes Berga93e3642010-06-10 10:21:46 +0200778 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +0200779 } 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 */
Johannes Berga93e3642010-06-10 10:21:46 +0200798 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200799 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +0200800 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,
Johannes Berg53f73c02010-10-05 19:37:40 +0200806 WLAN_REASON_QSTA_REQUIRE_SETUP,
807 true);
Johannes Berg344eec62010-06-10 10:21:36 +0200808 }
Johannes Berga93e3642010-06-10 10:21:46 +0200809 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200810 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +0200811 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");
Johannes Berg1fa57d02010-06-10 10:21:32 +0200824 break;
825 }
Johannes Berg36b3a622010-06-10 10:21:33 +0200826
827 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200828 }
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
Johannes Berg75636522008-07-09 14:40:35 +0200849/*
850 * Helper function to initialise an interface to a specific type.
851 */
852static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200853 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200854{
Johannes Berg75636522008-07-09 14:40:35 +0200855 /* 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;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200860 sdata->vif.p2p = false;
Johannes Berg587e7292009-01-30 13:35:22 +0100861 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg60719ff2008-09-16 14:55:09 +0200862 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +0200863
Johannes Berga621fa42010-08-27 14:26:54 +0300864 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
865 sdata->control_port_no_encrypt = false;
866
Johannes Berg75636522008-07-09 14:40:35 +0200867 /* only monitor differs */
868 sdata->dev->type = ARPHRD_ETHER;
869
Johannes Berg35f20c12010-06-10 10:21:30 +0200870 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200871 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200872
Johannes Berg75636522008-07-09 14:40:35 +0200873 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200874 case NL80211_IFTYPE_P2P_GO:
875 type = NL80211_IFTYPE_AP;
876 sdata->vif.type = type;
877 sdata->vif.p2p = true;
878 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200879 case NL80211_IFTYPE_AP:
Johannes Berg75636522008-07-09 14:40:35 +0200880 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
881 INIT_LIST_HEAD(&sdata->u.ap.vlans);
882 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200883 case NL80211_IFTYPE_P2P_CLIENT:
884 type = NL80211_IFTYPE_STATION;
885 sdata->vif.type = type;
886 sdata->vif.p2p = true;
887 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200888 case NL80211_IFTYPE_STATION:
Johannes Berg9c6bd792008-09-11 00:01:52 +0200889 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200890 break;
Johannes Berg46900292009-02-15 12:44:28 +0100891 case NL80211_IFTYPE_ADHOC:
892 ieee80211_ibss_setup_sdata(sdata);
893 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200894 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +0200895 if (ieee80211_vif_is_mesh(&sdata->vif))
896 ieee80211_mesh_init_sdata(sdata);
897 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200898 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +0200899 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +0100900 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +0200901 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
902 MONITOR_FLAG_OTHER_BSS;
903 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200904 case NL80211_IFTYPE_WDS:
905 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg75636522008-07-09 14:40:35 +0200906 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200907 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200908 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +0200909 BUG();
910 break;
911 }
912
913 ieee80211_debugfs_add_netdev(sdata);
914}
915
Johannes Berg34d4bc42010-08-27 12:35:58 +0200916static 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;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200921 enum nl80211_iftype internal_type = type;
922 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200923
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;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200955 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;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200963 default:
964 return -EBUSY;
965 }
966
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200967 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200968 if (ret)
969 return ret;
970
971 ieee80211_do_stop(sdata, false);
972
973 ieee80211_teardown_sdata(sdata->dev);
974
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200975 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200976 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
Johannes Bergf3947e22008-07-09 14:40:36 +0200987int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200988 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200989{
Johannes Berg34d4bc42010-08-27 12:35:58 +0200990 int ret;
991
Johannes Bergf3947e22008-07-09 14:40:36 +0200992 ASSERT_RTNL();
993
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200994 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +0200995 return 0;
996
Johannes Berge60c7742008-11-26 23:31:40 +0100997 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
Pavel Roskindcebf452008-12-22 16:39:36 -0500998 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
999 type == NL80211_IFTYPE_ADHOC)
Johannes Berge60c7742008-11-26 23:31:40 +01001000 return -EOPNOTSUPP;
1001
Johannes Berg34d4bc42010-08-27 12:35:58 +02001002 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 }
Johannes Berg75636522008-07-09 14:40:35 +02001011
1012 /* reset some values that shouldn't be kept across type changes */
Johannes Bergbda39332008-10-11 01:51:51 +02001013 sdata->vif.bss_conf.basic_rates =
Johannes Berg96dd22a2008-09-11 00:01:57 +02001014 ieee80211_mandatory_rates(sdata->local,
1015 sdata->local->hw.conf.channel->band);
Johannes Berg75636522008-07-09 14:40:35 +02001016 sdata->drop_unencrypted = 0;
Johannes Berg9bc383d2009-11-19 11:55:19 +01001017 if (type == NL80211_IFTYPE_STATION)
1018 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001019
1020 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001021}
1022
Johannes Bergfa9029f2010-02-25 15:13:11 +01001023static 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
Johannes Berg3e122be2008-07-09 14:40:34 +02001135int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg05c914f2008-09-11 00:01:58 +02001136 struct net_device **new_dev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001137 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -07001138{
1139 struct net_device *ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001140 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +02001141 int ret, i;
Jiri Bencf0706e82007-05-05 11:45:53 -07001142
1143 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001144
Johannes Bergcf0277e2010-01-05 18:00:58 +01001145 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1146 name, ieee80211_if_setup, local->hw.queues);
Jiri Bencf0706e82007-05-05 11:45:53 -07001147 if (!ndev)
1148 return -ENOMEM;
Johannes Berga272a722009-07-14 00:33:36 +02001149 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001150
Johannes Bergf3994ec2008-05-12 20:51:44 -07001151 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
Jiri Bencf0706e82007-05-05 11:45:53 -07001160 ret = dev_alloc_name(ndev, ndev->name);
1161 if (ret < 0)
1162 goto fail;
1163
Johannes Bergfa9029f2010-02-25 15:13:11 +01001164 ieee80211_assign_perm_addr(local, ndev, type);
1165 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -07001166 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1167
Johannes Berg3e122be2008-07-09 14:40:34 +02001168 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1169 sdata = netdev_priv(ndev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001170 ndev->ieee80211_ptr = &sdata->wdev;
Johannes Berg47846c92009-11-25 17:46:19 +01001171 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1172 memcpy(sdata->name, ndev->name, IFNAMSIZ);
Johannes Berg75636522008-07-09 14:40:35 +02001173
1174 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -07001175 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -07001176 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +02001177 sdata->dev = ndev;
Juuso Oikarinen68542962010-06-09 13:43:26 +03001178#ifdef CONFIG_INET
1179 sdata->arp_filter_state = true;
1180#endif
Johannes Berg75636522008-07-09 14:40:35 +02001181
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
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001187 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 }
Johannes Berg75636522008-07-09 14:40:35 +02001193
1194 /* setup type-dependent data */
1195 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001196
Johannes Berg9bc383d2009-11-19 11:55:19 +01001197 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
Jiri Bencf0706e82007-05-05 11:45:53 -07001203 ret = register_netdevice(ndev);
1204 if (ret)
1205 goto fail;
1206
Johannes Berg902acc72008-02-23 15:17:19 +01001207 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1208 params && params->mesh_id_len)
Johannes Berg472dbc42008-09-11 00:01:49 +02001209 ieee80211_sdata_set_mesh_id(sdata,
1210 params->mesh_id_len,
1211 params->mesh_id);
Luis Carlos Coboee385852008-02-23 15:17:11 +01001212
Johannes Bergc771c9d2009-01-23 22:54:03 +01001213 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001214 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001215 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001216
Jiri Bencf0706e82007-05-05 11:45:53 -07001217 if (new_dev)
1218 *new_dev = ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001219
Jiri Bencf0706e82007-05-05 11:45:53 -07001220 return 0;
1221
Johannes Berg75636522008-07-09 14:40:35 +02001222 fail:
Jiri Bencf0706e82007-05-05 11:45:53 -07001223 free_netdev(ndev);
1224 return ret;
1225}
1226
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001227void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001228{
Jiri Bencf0706e82007-05-05 11:45:53 -07001229 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001230
Johannes Bergc771c9d2009-01-23 22:54:03 +01001231 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001232 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001233 mutex_unlock(&sdata->local->iflist_mtx);
1234
Johannes Berg75636522008-07-09 14:40:35 +02001235 synchronize_rcu();
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001236 unregister_netdevice(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001237}
1238
Johannes Berg75636522008-07-09 14:40:35 +02001239/*
1240 * Remove all interfaces, may only be called at hardware unregistration
1241 * time because it doesn't do RCU-safe list removals.
1242 */
1243void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07001244{
Johannes Berg75636522008-07-09 14:40:35 +02001245 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001246 LIST_HEAD(unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001247
1248 ASSERT_RTNL();
1249
Eric Dumazetefe117a2009-11-05 11:06:40 +01001250 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001251 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1252 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001253
Eric Dumazetefe117a2009-11-05 11:06:40 +01001254 unregister_netdevice_queue(sdata->dev, &unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001255 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001256 mutex_unlock(&local->iflist_mtx);
1257 unregister_netdevice_many(&unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001258}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001259
1260static 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
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001267 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001268#endif
1269
1270 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1271 return IEEE80211_CONF_CHANGE_IDLE;
1272}
1273
1274static 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
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001280 wiphy_debug(local->hw.wiphy, "device now idle\n");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001281#endif
1282
Johannes Berga80f7c02009-12-23 13:15:32 +01001283 drv_flush(local, false);
1284
Johannes Berg5cff20e2009-04-29 12:26:17 +02001285 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1286 return IEEE80211_CONF_CHANGE_IDLE;
1287}
1288
1289u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1290{
1291 struct ieee80211_sub_if_data *sdata;
1292 int count = 0;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001293 bool working = false, scanning = false;
1294 struct ieee80211_work *wk;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001295
Johannes Berg7da7cc12010-08-05 17:02:38 +02001296#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);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001301
1302 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg7da7cc12010-08-05 17:02:38 +02001303 if (!ieee80211_sdata_running(sdata)) {
1304 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001305 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001306 }
1307
1308 sdata->old_idle = sdata->vif.bss_conf.idle;
1309
Johannes Berg5cff20e2009-04-29 12:26:17 +02001310 /* do not count disabled managed interfaces */
1311 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
Johannes Berg7da7cc12010-08-05 17:02:38 +02001312 !sdata->u.mgd.associated) {
1313 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001314 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001315 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001316 /* do not count unused IBSS interfaces */
1317 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Berg7da7cc12010-08-05 17:02:38 +02001318 !sdata->u.ibss.ssid_len) {
1319 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001320 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001321 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001322 /* count everything else */
1323 count++;
1324 }
1325
Johannes Berg7da7cc12010-08-05 17:02:38 +02001326 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");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001348 if (!count)
1349 return ieee80211_idle_on(local);
1350 else
1351 return ieee80211_idle_off(local, "in use");
1352
1353 return 0;
1354}
1355
1356void 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);
Johannes Berg58905ca2009-05-07 14:23:01 +02001363 if (chg)
1364 ieee80211_hw_config(local, chg);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001365}
Johannes Berg47846c92009-11-25 17:46:19 +01001366
1367static 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
Johannes Berg2f5265e2010-02-12 10:45:05 +01001385 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001386
1387 ieee80211_debugfs_rename_netdev(sdata);
1388 return 0;
1389}
1390
1391static struct notifier_block mac80211_netdev_notifier = {
1392 .notifier_call = netdev_notify,
1393};
1394
1395int ieee80211_iface_init(void)
1396{
1397 return register_netdevice_notifier(&mac80211_netdev_notifier);
1398}
1399
1400void ieee80211_iface_exit(void)
1401{
1402 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1403}