blob: 30d73552e9ab0f89ef53707e564dd67aee47a3b8 [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:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200200 case NL80211_IFTYPE_STATION:
201 case NL80211_IFTYPE_MONITOR:
202 case NL80211_IFTYPE_ADHOC:
203 /* no special treatment */
204 break;
205 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200206 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200207 case NL80211_IFTYPE_P2P_CLIENT:
208 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200209 /* cannot happen */
210 WARN_ON(1);
211 break;
212 }
213
214 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200215 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200216 if (res)
217 goto err_del_bss;
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400218 if (local->ops->napi_poll)
219 napi_enable(&local->napi);
Johannes Berge8975582008-10-09 12:18:51 +0200220 /* we're brought up, everything changes */
221 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200222 ieee80211_led_radio(local, true);
Johannes Berg67408c82010-11-30 08:59:23 +0100223 ieee80211_mod_tpt_led_trig(local,
224 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200225 }
226
227 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200228 * Copy the hopefully now-present MAC address to
229 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200230 */
Johannes Bergbf533e02010-08-27 12:35:56 +0200231 if (is_zero_ether_addr(dev->dev_addr)) {
232 memcpy(dev->dev_addr,
233 local->hw.wiphy->perm_addr,
234 ETH_ALEN);
235 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200236
Johannes Bergbf533e02010-08-27 12:35:56 +0200237 if (!is_valid_ether_addr(dev->dev_addr)) {
238 if (!local->open_count)
239 drv_stop(local);
240 return -EADDRNOTAVAIL;
John W. Linville0adc23f2009-10-06 16:27:18 -0400241 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200242 }
243
Johannes Berg0d143fe2008-09-11 00:01:59 +0200244 switch (sdata->vif.type) {
245 case NL80211_IFTYPE_AP_VLAN:
246 /* no need to tell driver */
247 break;
248 case NL80211_IFTYPE_MONITOR:
249 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
250 local->cooked_mntrs++;
251 break;
252 }
253
254 /* must be before the call to ieee80211_configure_filter */
255 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200256 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100257 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
258 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200259 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200260
Christian Lamparter85416a42010-10-02 13:17:07 +0200261 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200262 ieee80211_configure_filter(local);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200263
264 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200265 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200266 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200267 if (coming_up) {
268 res = drv_add_interface(local, &sdata->vif);
269 if (res)
270 goto err_stop;
271 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200272
Johannes Berg29cbe682010-12-03 09:20:44 +0100273 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400274 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200275 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400276
Igor Perminove3b90ca2009-08-04 16:48:51 +0400277 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200278 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
279 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700280 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400281
Johannes Berg0d143fe2008-09-11 00:01:59 +0200282 changed |= ieee80211_reset_erp_info(sdata);
283 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200284
Johannes Berg7986cf92009-03-21 17:08:43 +0100285 if (sdata->vif.type == NL80211_IFTYPE_STATION)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200286 netif_carrier_off(dev);
287 else
288 netif_carrier_on(dev);
289 }
290
Johannes Berg2d2080c2010-09-15 15:13:13 +0200291 set_bit(SDATA_STATE_RUNNING, &sdata->state);
292
Johannes Berg0d143fe2008-09-11 00:01:59 +0200293 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
294 /* Create STA entry for the WDS peer */
295 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
296 GFP_KERNEL);
297 if (!sta) {
298 res = -ENOMEM;
299 goto err_del_interface;
300 }
301
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200302 /* no atomic bitop required since STA is not live yet */
303 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200304
305 res = sta_info_insert(sta);
306 if (res) {
307 /* STA has been freed */
308 goto err_del_interface;
309 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400310
311 rate_control_rate_init(sta);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200312 }
313
Johannes Berg0d143fe2008-09-11 00:01:59 +0200314 /*
315 * set_multicast_list will be invoked by the networking core
316 * which will check whether any increments here were done in
317 * error and sync them down to the hardware as filter flags.
318 */
319 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
320 atomic_inc(&local->iff_allmultis);
321
322 if (sdata->flags & IEEE80211_SDATA_PROMISC)
323 atomic_inc(&local->iff_promiscs);
324
Johannes Berg7da7cc12010-08-05 17:02:38 +0200325 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200326 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200327 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200328
Johannes Berg34d4bc42010-08-27 12:35:58 +0200329 if (coming_up)
330 local->open_count++;
331
Johannes Berge8975582008-10-09 12:18:51 +0200332 if (hw_reconf_flags) {
333 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200334 /*
335 * set default queue parameters so drivers don't
336 * need to initialise the hardware if the hardware
337 * doesn't start up with sane defaults
338 */
339 ieee80211_set_wmm_default(sdata);
340 }
341
Johannes Berg10f644a2009-04-16 13:17:25 +0200342 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200343
John W. Linville8a5b33f2010-01-06 15:39:39 -0500344 netif_tx_start_all_queues(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200345
346 return 0;
347 err_del_interface:
Johannes Berg1ed32e42009-12-23 13:15:45 +0100348 drv_remove_interface(local, &sdata->vif);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200349 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200350 if (!local->open_count)
351 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200352 err_del_bss:
353 sdata->bss = NULL;
354 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
355 list_del(&sdata->u.vlan.list);
Johannes Berg2d2080c2010-09-15 15:13:13 +0200356 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200357 return res;
358}
359
Johannes Berg34d4bc42010-08-27 12:35:58 +0200360static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200361{
362 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200363 int err;
364
365 /* fail early if user set an invalid address */
Mohammed Shafi Shajakhan2fcf28242011-07-12 15:19:04 +0530366 if (!is_valid_ether_addr(dev->dev_addr))
Johannes Berg34d4bc42010-08-27 12:35:58 +0200367 return -EADDRNOTAVAIL;
368
369 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
370 if (err)
371 return err;
372
373 return ieee80211_do_open(dev, true);
374}
375
376static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
377 bool going_down)
378{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200379 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200380 unsigned long flags;
381 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200382 u32 hw_reconf_flags = 0;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200383 int i;
Ben Greear2cf22b82011-01-31 11:30:09 -0800384 enum nl80211_channel_type orig_ct;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200385
Rajkumar Manoharanc29acf22011-05-14 09:43:28 +0530386 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
387
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700388 if (local->scan_sdata == sdata)
389 ieee80211_scan_cancel(local);
390
Johannes Berg0d143fe2008-09-11 00:01:59 +0200391 /*
392 * Stop TX on this interface first.
393 */
Johannes Berg34d4bc42010-08-27 12:35:58 +0200394 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200395
396 /*
Johannes Bergaf6b6372009-12-23 13:15:35 +0100397 * Purge work for this interface.
398 */
399 ieee80211_work_purge(sdata);
400
401 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200402 * Remove all stations associated with this interface.
403 *
404 * This must be done before calling ops->remove_interface()
405 * because otherwise we can later invoke ops->sta_notify()
406 * whenever the STAs are removed, and that invalidates driver
407 * assumptions about always getting a vif pointer that is valid
408 * (because if we remove a STA after ops->remove_interface()
409 * the driver will have removed the vif info already!)
410 *
Johannes Bergb9dcf712010-08-27 12:35:54 +0200411 * This is relevant only in AP, WDS and mesh modes, since in
412 * all other modes we've already removed all stations when
413 * disconnecting etc.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200414 */
415 sta_info_flush(local, sdata);
416
417 /*
418 * Don't count this interface for promisc/allmulti while it
419 * is down. dev_mc_unsync() will invoke set_multicast_list
420 * on the master interface which will sync these down to the
421 * hardware as filter flags.
422 */
423 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
424 atomic_dec(&local->iff_allmultis);
425
426 if (sdata->flags & IEEE80211_SDATA_PROMISC)
427 atomic_dec(&local->iff_promiscs);
428
Johannes Berg7be50862010-10-13 12:06:24 +0200429 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400430 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200431 local->fif_probe_req--;
432 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
433 local->fif_probe_req--;
434 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400435
Johannes Berg34d4bc42010-08-27 12:35:58 +0200436 netif_addr_lock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200437 spin_lock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200438 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
439 sdata->dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200440 spin_unlock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200441 netif_addr_unlock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200442
Johannes Berg3ac64be2009-08-17 16:16:53 +0200443 ieee80211_configure_filter(local);
444
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800445 del_timer_sync(&local->dynamic_ps_timer);
446 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200447
448 /* APs need special treatment */
449 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200450 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200451 struct beacon_data *old_beacon =
452 rtnl_dereference(sdata->u.ap.beacon);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200453
Johannes Bergb9dcf712010-08-27 12:35:54 +0200454 /* sdata_running will return false, so this will disable */
455 ieee80211_bss_info_change_notify(sdata,
456 BSS_CHANGED_BEACON_ENABLED);
457
Johannes Berg0d143fe2008-09-11 00:01:59 +0200458 /* remove beacon */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +0000459 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200460 synchronize_rcu();
461 kfree(old_beacon);
462
463 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200464 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200465 u.vlan.list)
466 dev_close(vlan->dev);
467 WARN_ON(!list_empty(&sdata->u.ap.vlans));
Johannes Berg6f2d9332011-09-20 17:40:51 +0200468
469 /* free all potentially still buffered bcast frames */
470 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
471 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200472 }
473
Johannes Berg34d4bc42010-08-27 12:35:58 +0200474 if (going_down)
475 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200476
477 switch (sdata->vif.type) {
478 case NL80211_IFTYPE_AP_VLAN:
479 list_del(&sdata->u.vlan.list);
480 /* no need to tell driver */
481 break;
482 case NL80211_IFTYPE_MONITOR:
483 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
484 local->cooked_mntrs--;
485 break;
486 }
487
488 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200489 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100490 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
491 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200492 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200493
Christian Lamparter85416a42010-10-02 13:17:07 +0200494 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200495 ieee80211_configure_filter(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200496 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200497 default:
Johannes Bergc1475ca2010-06-10 10:21:37 +0200498 flush_work(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200499 /*
500 * When we get here, the interface is marked down.
501 * Call synchronize_rcu() to wait for the RX path
502 * should it be using the interface and enqueuing
503 * frames at this very time on another CPU.
504 */
505 synchronize_rcu();
506 skb_queue_purge(&sdata->skb_queue);
507
Bob Copeland97af7432009-07-29 10:13:03 +0200508 /*
Johannes Bergb9dcf712010-08-27 12:35:54 +0200509 * Disable beaconing here for mesh only, AP and IBSS
510 * are already taken care of.
Bob Copeland97af7432009-07-29 10:13:03 +0200511 */
Johannes Bergb9dcf712010-08-27 12:35:54 +0200512 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Bob Copeland97af7432009-07-29 10:13:03 +0200513 ieee80211_bss_info_change_notify(sdata,
514 BSS_CHANGED_BEACON_ENABLED);
Bob Copeland97af7432009-07-29 10:13:03 +0200515
Johannes Bergb9dcf712010-08-27 12:35:54 +0200516 /*
517 * Free all remaining keys, there shouldn't be any,
518 * except maybe group keys in AP more or WDS?
519 */
Johannes Bergad0e2b52010-06-01 10:19:19 +0200520 ieee80211_free_keys(sdata);
Johannes Bergb9dcf712010-08-27 12:35:54 +0200521
Johannes Berg34d4bc42010-08-27 12:35:58 +0200522 if (going_down)
523 drv_remove_interface(local, &sdata->vif);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200524 }
525
526 sdata->bss = NULL;
527
Johannes Berg7da7cc12010-08-05 17:02:38 +0200528 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200529 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200530 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200531
532 ieee80211_recalc_ps(local, -1);
533
Johannes Berg0d143fe2008-09-11 00:01:59 +0200534 if (local->open_count == 0) {
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400535 if (local->ops->napi_poll)
536 napi_disable(&local->napi);
Johannes Bergea77f122009-08-21 14:44:45 +0200537 ieee80211_clear_tx_pending(local);
Johannes Berg84f6a012009-08-20 20:02:20 +0200538 ieee80211_stop_device(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200539
Johannes Berge8975582008-10-09 12:18:51 +0200540 /* no reconfiguring after stop! */
541 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200542 }
543
Ben Greear2cf22b82011-01-31 11:30:09 -0800544 /* Re-calculate channel-type, in case there are multiple vifs
545 * on different channel types.
546 */
547 orig_ct = local->_oper_channel_type;
548 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
549
Johannes Berge8975582008-10-09 12:18:51 +0200550 /* do after stop to avoid reconfiguring when we stop anyway */
Ben Greear2cf22b82011-01-31 11:30:09 -0800551 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
Johannes Berge8975582008-10-09 12:18:51 +0200552 ieee80211_hw_config(local, hw_reconf_flags);
553
Johannes Berg5061b0c2009-07-14 00:33:34 +0200554 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
555 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
556 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
557 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
558 if (info->control.vif == &sdata->vif) {
559 __skb_unlink(skb, &local->pending[i]);
560 dev_kfree_skb_irq(skb);
561 }
562 }
563 }
564 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200565}
566
567static int ieee80211_stop(struct net_device *dev)
568{
569 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
570
571 ieee80211_do_stop(sdata, true);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200572
Johannes Berg0d143fe2008-09-11 00:01:59 +0200573 return 0;
574}
575
576static void ieee80211_set_multicast_list(struct net_device *dev)
577{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200578 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200579 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200580 int allmulti, promisc, sdata_allmulti, sdata_promisc;
581
582 allmulti = !!(dev->flags & IFF_ALLMULTI);
583 promisc = !!(dev->flags & IFF_PROMISC);
584 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
585 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
586
587 if (allmulti != sdata_allmulti) {
588 if (dev->flags & IFF_ALLMULTI)
589 atomic_inc(&local->iff_allmultis);
590 else
591 atomic_dec(&local->iff_allmultis);
592 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
593 }
594
595 if (promisc != sdata_promisc) {
596 if (dev->flags & IFF_PROMISC)
597 atomic_inc(&local->iff_promiscs);
598 else
599 atomic_dec(&local->iff_promiscs);
600 sdata->flags ^= IEEE80211_SDATA_PROMISC;
601 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200602 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000603 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200604 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +0200605 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200606}
607
Johannes Berg75636522008-07-09 14:40:35 +0200608/*
609 * Called when the netdev is removed or, by the code below, before
610 * the interface type changes.
611 */
612static void ieee80211_teardown_sdata(struct net_device *dev)
Jiri Bencf0706e82007-05-05 11:45:53 -0700613{
Johannes Berg75636522008-07-09 14:40:35 +0200614 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
615 struct ieee80211_local *local = sdata->local;
Johannes Berg75636522008-07-09 14:40:35 +0200616 int flushed;
Jiri Bencf0706e82007-05-05 11:45:53 -0700617 int i;
618
Johannes Berg75636522008-07-09 14:40:35 +0200619 /* free extra data */
620 ieee80211_free_keys(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700621
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200622 ieee80211_debugfs_remove_netdev(sdata);
623
Johannes Berg988c0f72008-04-17 19:21:22 +0200624 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -0700625 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200626 sdata->fragment_next = 0;
627
Johannes Bergb9dcf712010-08-27 12:35:54 +0200628 if (ieee80211_vif_is_mesh(&sdata->vif))
629 mesh_rmc_free(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200630
631 flushed = sta_info_flush(local, sdata);
632 WARN_ON(flushed);
Jiri Bencf0706e82007-05-05 11:45:53 -0700633}
634
Johannes Bergcf0277e2010-01-05 18:00:58 +0100635static u16 ieee80211_netdev_select_queue(struct net_device *dev,
636 struct sk_buff *skb)
637{
638 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
639}
640
Johannes Berg587e7292009-01-30 13:35:22 +0100641static const struct net_device_ops ieee80211_dataif_ops = {
642 .ndo_open = ieee80211_open,
643 .ndo_stop = ieee80211_stop,
644 .ndo_uninit = ieee80211_teardown_sdata,
645 .ndo_start_xmit = ieee80211_subif_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000646 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +0100647 .ndo_change_mtu = ieee80211_change_mtu,
Johannes Berg47846c92009-11-25 17:46:19 +0100648 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100649 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100650};
651
Johannes Bergcf0277e2010-01-05 18:00:58 +0100652static u16 ieee80211_monitor_select_queue(struct net_device *dev,
653 struct sk_buff *skb)
654{
655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
656 struct ieee80211_local *local = sdata->local;
657 struct ieee80211_hdr *hdr;
658 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
Felix Fietkau193e70e2010-01-11 06:47:00 +0100659 u8 *p;
Johannes Bergcf0277e2010-01-05 18:00:58 +0100660
661 if (local->hw.queues < 4)
662 return 0;
663
664 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +0100665 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +0100666 return 0; /* doesn't matter, frame will be dropped */
667
Johannes Bergb49bb572010-01-08 19:00:00 +0100668 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +0100669
Felix Fietkau861a57c2010-01-12 04:08:26 +0100670 if (!ieee80211_is_data(hdr->frame_control)) {
Johannes Bergcf0277e2010-01-05 18:00:58 +0100671 skb->priority = 7;
672 return ieee802_1d_to_ac[skb->priority];
673 }
Felix Fietkau861a57c2010-01-12 04:08:26 +0100674 if (!ieee80211_is_data_qos(hdr->frame_control)) {
675 skb->priority = 0;
676 return ieee802_1d_to_ac[skb->priority];
677 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100678
Felix Fietkau193e70e2010-01-11 06:47:00 +0100679 p = ieee80211_get_qos_ctl(hdr);
680 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
681
Johannes Bergcf0277e2010-01-05 18:00:58 +0100682 return ieee80211_downgrade_queue(local, skb);
683}
684
Johannes Berg587e7292009-01-30 13:35:22 +0100685static const struct net_device_ops ieee80211_monitorif_ops = {
686 .ndo_open = ieee80211_open,
687 .ndo_stop = ieee80211_stop,
688 .ndo_uninit = ieee80211_teardown_sdata,
689 .ndo_start_xmit = ieee80211_monitor_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000690 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +0100691 .ndo_change_mtu = ieee80211_change_mtu,
692 .ndo_set_mac_address = eth_mac_addr,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100693 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100694};
695
696static void ieee80211_if_setup(struct net_device *dev)
697{
698 ether_setup(dev);
Neil Horman550fd082011-07-26 06:05:38 +0000699 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Johannes Berg587e7292009-01-30 13:35:22 +0100700 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg587e7292009-01-30 13:35:22 +0100701 dev->destructor = free_netdev;
702}
703
Johannes Berg1fa57d02010-06-10 10:21:32 +0200704static void ieee80211_iface_work(struct work_struct *work)
705{
706 struct ieee80211_sub_if_data *sdata =
707 container_of(work, struct ieee80211_sub_if_data, work);
708 struct ieee80211_local *local = sdata->local;
709 struct sk_buff *skb;
Johannes Berg344eec62010-06-10 10:21:36 +0200710 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +0200711 struct ieee80211_ra_tid *ra_tid;
Johannes Berg1fa57d02010-06-10 10:21:32 +0200712
713 if (!ieee80211_sdata_running(sdata))
714 return;
715
716 if (local->scanning)
717 return;
718
719 /*
720 * ieee80211_queue_work() should have picked up most cases,
721 * here we'll pick the rest.
722 */
723 if (WARN(local->suspended,
724 "interface work scheduled while going to suspend\n"))
725 return;
726
727 /* first process frames */
728 while ((skb = skb_dequeue(&sdata->skb_queue))) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200729 struct ieee80211_mgmt *mgmt = (void *)skb->data;
730
Johannes Bergc1475ca2010-06-10 10:21:37 +0200731 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
732 ra_tid = (void *)&skb->cb;
733 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
734 ra_tid->tid);
735 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
736 ra_tid = (void *)&skb->cb;
737 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
738 ra_tid->tid);
739 } else if (ieee80211_is_action(mgmt->frame_control) &&
740 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200741 int len = skb->len;
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200742
Johannes Berga93e3642010-06-10 10:21:46 +0200743 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200744 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200745 if (sta) {
746 switch (mgmt->u.action.u.addba_req.action_code) {
747 case WLAN_ACTION_ADDBA_REQ:
748 ieee80211_process_addba_request(
749 local, sta, mgmt, len);
750 break;
751 case WLAN_ACTION_ADDBA_RESP:
752 ieee80211_process_addba_resp(local, sta,
753 mgmt, len);
754 break;
755 case WLAN_ACTION_DELBA:
756 ieee80211_process_delba(sdata, sta,
757 mgmt, len);
758 break;
759 default:
760 WARN_ON(1);
761 break;
762 }
763 }
Johannes Berga93e3642010-06-10 10:21:46 +0200764 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +0200765 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
766 struct ieee80211_hdr *hdr = (void *)mgmt;
767 /*
768 * So the frame isn't mgmt, but frame_control
769 * is at the right place anyway, of course, so
770 * the if statement is correct.
771 *
772 * Warn if we have other data frame types here,
773 * they must not get here.
774 */
775 WARN_ON(hdr->frame_control &
776 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
777 WARN_ON(!(hdr->seq_ctrl &
778 cpu_to_le16(IEEE80211_SCTL_FRAG)));
779 /*
780 * This was a fragment of a frame, received while
781 * a block-ack session was active. That cannot be
782 * right, so terminate the session.
783 */
Johannes Berga93e3642010-06-10 10:21:46 +0200784 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200785 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +0200786 if (sta) {
787 u16 tid = *ieee80211_get_qos_ctl(hdr) &
788 IEEE80211_QOS_CTL_TID_MASK;
789
790 __ieee80211_stop_rx_ba_session(
791 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +0200792 WLAN_REASON_QSTA_REQUIRE_SETUP,
793 true);
Johannes Berg344eec62010-06-10 10:21:36 +0200794 }
Johannes Berga93e3642010-06-10 10:21:46 +0200795 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +0200796 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +0200797 case NL80211_IFTYPE_STATION:
798 ieee80211_sta_rx_queued_mgmt(sdata, skb);
799 break;
800 case NL80211_IFTYPE_ADHOC:
801 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
802 break;
803 case NL80211_IFTYPE_MESH_POINT:
804 if (!ieee80211_vif_is_mesh(&sdata->vif))
805 break;
806 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
807 break;
808 default:
809 WARN(1, "frame for unexpected interface type");
Johannes Berg1fa57d02010-06-10 10:21:32 +0200810 break;
811 }
Johannes Berg36b3a622010-06-10 10:21:33 +0200812
813 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200814 }
815
816 /* then other type-dependent work */
817 switch (sdata->vif.type) {
818 case NL80211_IFTYPE_STATION:
819 ieee80211_sta_work(sdata);
820 break;
821 case NL80211_IFTYPE_ADHOC:
822 ieee80211_ibss_work(sdata);
823 break;
824 case NL80211_IFTYPE_MESH_POINT:
825 if (!ieee80211_vif_is_mesh(&sdata->vif))
826 break;
827 ieee80211_mesh_work(sdata);
828 break;
829 default:
830 break;
831 }
832}
833
834
Johannes Berg75636522008-07-09 14:40:35 +0200835/*
836 * Helper function to initialise an interface to a specific type.
837 */
838static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200839 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200840{
Johannes Berg75636522008-07-09 14:40:35 +0200841 /* clear type-dependent union */
842 memset(&sdata->u, 0, sizeof(sdata->u));
843
844 /* and set some type-dependent values */
845 sdata->vif.type = type;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200846 sdata->vif.p2p = false;
Johannes Berg587e7292009-01-30 13:35:22 +0100847 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg60719ff2008-09-16 14:55:09 +0200848 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +0200849
Johannes Berga621fa42010-08-27 14:26:54 +0300850 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
851 sdata->control_port_no_encrypt = false;
852
Johannes Berg75636522008-07-09 14:40:35 +0200853 /* only monitor differs */
854 sdata->dev->type = ARPHRD_ETHER;
855
Johannes Berg35f20c12010-06-10 10:21:30 +0200856 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200857 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200858
Johannes Berg75636522008-07-09 14:40:35 +0200859 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200860 case NL80211_IFTYPE_P2P_GO:
861 type = NL80211_IFTYPE_AP;
862 sdata->vif.type = type;
863 sdata->vif.p2p = true;
864 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200865 case NL80211_IFTYPE_AP:
Johannes Berg75636522008-07-09 14:40:35 +0200866 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
867 INIT_LIST_HEAD(&sdata->u.ap.vlans);
868 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200869 case NL80211_IFTYPE_P2P_CLIENT:
870 type = NL80211_IFTYPE_STATION;
871 sdata->vif.type = type;
872 sdata->vif.p2p = true;
873 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200874 case NL80211_IFTYPE_STATION:
Johannes Berg9c6bd792008-09-11 00:01:52 +0200875 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200876 break;
Johannes Berg46900292009-02-15 12:44:28 +0100877 case NL80211_IFTYPE_ADHOC:
878 ieee80211_ibss_setup_sdata(sdata);
879 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200880 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +0200881 if (ieee80211_vif_is_mesh(&sdata->vif))
882 ieee80211_mesh_init_sdata(sdata);
883 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200884 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +0200885 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +0100886 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +0200887 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
888 MONITOR_FLAG_OTHER_BSS;
889 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200890 case NL80211_IFTYPE_WDS:
891 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg75636522008-07-09 14:40:35 +0200892 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200893 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200894 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +0200895 BUG();
896 break;
897 }
898
899 ieee80211_debugfs_add_netdev(sdata);
900}
901
Johannes Berg34d4bc42010-08-27 12:35:58 +0200902static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
903 enum nl80211_iftype type)
904{
905 struct ieee80211_local *local = sdata->local;
906 int ret, err;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200907 enum nl80211_iftype internal_type = type;
908 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200909
910 ASSERT_RTNL();
911
912 if (!local->ops->change_interface)
913 return -EBUSY;
914
915 switch (sdata->vif.type) {
916 case NL80211_IFTYPE_AP:
917 case NL80211_IFTYPE_STATION:
918 case NL80211_IFTYPE_ADHOC:
919 /*
920 * Could maybe also all others here?
921 * Just not sure how that interacts
922 * with the RX/config path e.g. for
923 * mesh.
924 */
925 break;
926 default:
927 return -EBUSY;
928 }
929
930 switch (type) {
931 case NL80211_IFTYPE_AP:
932 case NL80211_IFTYPE_STATION:
933 case NL80211_IFTYPE_ADHOC:
934 /*
935 * Could probably support everything
936 * but WDS here (WDS do_open can fail
937 * under memory pressure, which this
938 * code isn't prepared to handle).
939 */
940 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200941 case NL80211_IFTYPE_P2P_CLIENT:
942 p2p = true;
943 internal_type = NL80211_IFTYPE_STATION;
944 break;
945 case NL80211_IFTYPE_P2P_GO:
946 p2p = true;
947 internal_type = NL80211_IFTYPE_AP;
948 break;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200949 default:
950 return -EBUSY;
951 }
952
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200953 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200954 if (ret)
955 return ret;
956
957 ieee80211_do_stop(sdata, false);
958
959 ieee80211_teardown_sdata(sdata->dev);
960
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200961 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200962 if (ret)
963 type = sdata->vif.type;
964
965 ieee80211_setup_sdata(sdata, type);
966
967 err = ieee80211_do_open(sdata->dev, false);
968 WARN(err, "type change: do_open returned %d", err);
969
970 return ret;
971}
972
Johannes Bergf3947e22008-07-09 14:40:36 +0200973int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200974 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200975{
Johannes Berg34d4bc42010-08-27 12:35:58 +0200976 int ret;
977
Johannes Bergf3947e22008-07-09 14:40:36 +0200978 ASSERT_RTNL();
979
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200980 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +0200981 return 0;
982
Johannes Berge60c7742008-11-26 23:31:40 +0100983 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
Pavel Roskindcebf452008-12-22 16:39:36 -0500984 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
985 type == NL80211_IFTYPE_ADHOC)
Johannes Berge60c7742008-11-26 23:31:40 +0100986 return -EOPNOTSUPP;
987
Johannes Berg34d4bc42010-08-27 12:35:58 +0200988 if (ieee80211_sdata_running(sdata)) {
989 ret = ieee80211_runtime_change_iftype(sdata, type);
990 if (ret)
991 return ret;
992 } else {
993 /* Purge and reset type-dependent state. */
994 ieee80211_teardown_sdata(sdata->dev);
995 ieee80211_setup_sdata(sdata, type);
996 }
Johannes Berg75636522008-07-09 14:40:35 +0200997
998 /* reset some values that shouldn't be kept across type changes */
Johannes Bergbda39332008-10-11 01:51:51 +0200999 sdata->vif.bss_conf.basic_rates =
Johannes Berg96dd22a2008-09-11 00:01:57 +02001000 ieee80211_mandatory_rates(sdata->local,
1001 sdata->local->hw.conf.channel->band);
Johannes Berg75636522008-07-09 14:40:35 +02001002 sdata->drop_unencrypted = 0;
Johannes Berg9bc383d2009-11-19 11:55:19 +01001003 if (type == NL80211_IFTYPE_STATION)
1004 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001005
1006 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001007}
1008
Johannes Bergfa9029f2010-02-25 15:13:11 +01001009static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1010 struct net_device *dev,
1011 enum nl80211_iftype type)
1012{
1013 struct ieee80211_sub_if_data *sdata;
1014 u64 mask, start, addr, val, inc;
1015 u8 *m;
1016 u8 tmp_addr[ETH_ALEN];
1017 int i;
1018
1019 /* default ... something at least */
1020 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1021
1022 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1023 local->hw.wiphy->n_addresses <= 1)
1024 return;
1025
1026
1027 mutex_lock(&local->iflist_mtx);
1028
1029 switch (type) {
1030 case NL80211_IFTYPE_MONITOR:
1031 /* doesn't matter */
1032 break;
1033 case NL80211_IFTYPE_WDS:
1034 case NL80211_IFTYPE_AP_VLAN:
1035 /* match up with an AP interface */
1036 list_for_each_entry(sdata, &local->interfaces, list) {
1037 if (sdata->vif.type != NL80211_IFTYPE_AP)
1038 continue;
1039 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1040 break;
1041 }
1042 /* keep default if no AP interface present */
1043 break;
1044 default:
1045 /* assign a new address if possible -- try n_addresses first */
1046 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1047 bool used = false;
1048
1049 list_for_each_entry(sdata, &local->interfaces, list) {
1050 if (memcmp(local->hw.wiphy->addresses[i].addr,
1051 sdata->vif.addr, ETH_ALEN) == 0) {
1052 used = true;
1053 break;
1054 }
1055 }
1056
1057 if (!used) {
1058 memcpy(dev->perm_addr,
1059 local->hw.wiphy->addresses[i].addr,
1060 ETH_ALEN);
1061 break;
1062 }
1063 }
1064
1065 /* try mask if available */
1066 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1067 break;
1068
1069 m = local->hw.wiphy->addr_mask;
1070 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1071 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1072 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1073
1074 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1075 /* not a contiguous mask ... not handled now! */
1076 printk(KERN_DEBUG "not contiguous\n");
1077 break;
1078 }
1079
1080 m = local->hw.wiphy->perm_addr;
1081 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1082 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1083 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1084
1085 inc = 1ULL<<__ffs64(mask);
1086 val = (start & mask);
1087 addr = (start & ~mask) | (val & mask);
1088 do {
1089 bool used = false;
1090
1091 tmp_addr[5] = addr >> 0*8;
1092 tmp_addr[4] = addr >> 1*8;
1093 tmp_addr[3] = addr >> 2*8;
1094 tmp_addr[2] = addr >> 3*8;
1095 tmp_addr[1] = addr >> 4*8;
1096 tmp_addr[0] = addr >> 5*8;
1097
1098 val += inc;
1099
1100 list_for_each_entry(sdata, &local->interfaces, list) {
1101 if (memcmp(tmp_addr, sdata->vif.addr,
1102 ETH_ALEN) == 0) {
1103 used = true;
1104 break;
1105 }
1106 }
1107
1108 if (!used) {
1109 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1110 break;
1111 }
1112 addr = (start & ~mask) | (val & mask);
1113 } while (addr != start);
1114
1115 break;
1116 }
1117
1118 mutex_unlock(&local->iflist_mtx);
1119}
1120
Johannes Berg3e122be2008-07-09 14:40:34 +02001121int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg05c914f2008-09-11 00:01:58 +02001122 struct net_device **new_dev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001123 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -07001124{
1125 struct net_device *ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001126 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +02001127 int ret, i;
Jiri Bencf0706e82007-05-05 11:45:53 -07001128
1129 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001130
Johannes Berg55d99052011-07-09 15:39:16 +02001131 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1132 name, ieee80211_if_setup, local->hw.queues, 1);
Jiri Bencf0706e82007-05-05 11:45:53 -07001133 if (!ndev)
1134 return -ENOMEM;
Johannes Berga272a722009-07-14 00:33:36 +02001135 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001136
Johannes Bergf3994ec2008-05-12 20:51:44 -07001137 ndev->needed_headroom = local->tx_headroom +
1138 4*6 /* four MAC addresses */
1139 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1140 + 6 /* mesh */
1141 + 8 /* rfc1042/bridge tunnel */
1142 - ETH_HLEN /* ethernet hard_header_len */
1143 + IEEE80211_ENCRYPT_HEADROOM;
1144 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1145
Thadeu Lima de Souza Cascardo59e7e702011-06-02 17:28:37 -03001146 ret = dev_alloc_name(ndev, ndev->name);
1147 if (ret < 0)
1148 goto fail;
1149
Johannes Bergfa9029f2010-02-25 15:13:11 +01001150 ieee80211_assign_perm_addr(local, ndev, type);
1151 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -07001152 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1153
Johannes Berg3e122be2008-07-09 14:40:34 +02001154 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1155 sdata = netdev_priv(ndev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001156 ndev->ieee80211_ptr = &sdata->wdev;
Johannes Berg47846c92009-11-25 17:46:19 +01001157 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1158 memcpy(sdata->name, ndev->name, IFNAMSIZ);
Johannes Berg75636522008-07-09 14:40:35 +02001159
1160 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -07001161 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -07001162 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +02001163 sdata->dev = ndev;
Juuso Oikarinen68542962010-06-09 13:43:26 +03001164#ifdef CONFIG_INET
1165 sdata->arp_filter_state = true;
1166#endif
Johannes Berg75636522008-07-09 14:40:35 +02001167
1168 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1169 skb_queue_head_init(&sdata->fragments[i].skb_list);
1170
1171 INIT_LIST_HEAD(&sdata->key_list);
1172
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001173 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1174 struct ieee80211_supported_band *sband;
1175 sband = local->hw.wiphy->bands[i];
1176 sdata->rc_rateidx_mask[i] =
1177 sband ? (1 << sband->n_bitrates) - 1 : 0;
1178 }
Johannes Berg75636522008-07-09 14:40:35 +02001179
1180 /* setup type-dependent data */
1181 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001182
Johannes Berg9bc383d2009-11-19 11:55:19 +01001183 if (params) {
1184 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1185 if (type == NL80211_IFTYPE_STATION)
1186 sdata->u.mgd.use_4addr = params->use_4addr;
1187 }
1188
Jiri Bencf0706e82007-05-05 11:45:53 -07001189 ret = register_netdevice(ndev);
1190 if (ret)
1191 goto fail;
1192
Johannes Bergc771c9d2009-01-23 22:54:03 +01001193 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001194 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001195 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001196
Jiri Bencf0706e82007-05-05 11:45:53 -07001197 if (new_dev)
1198 *new_dev = ndev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001199
Jiri Bencf0706e82007-05-05 11:45:53 -07001200 return 0;
1201
Johannes Berg75636522008-07-09 14:40:35 +02001202 fail:
Jiri Bencf0706e82007-05-05 11:45:53 -07001203 free_netdev(ndev);
1204 return ret;
1205}
1206
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001207void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001208{
Jiri Bencf0706e82007-05-05 11:45:53 -07001209 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001210
Johannes Bergc771c9d2009-01-23 22:54:03 +01001211 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001212 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001213 mutex_unlock(&sdata->local->iflist_mtx);
1214
Javier Cardonaece1a2e2011-08-29 13:23:04 -07001215 if (ieee80211_vif_is_mesh(&sdata->vif))
1216 mesh_path_flush_by_iface(sdata);
1217
Johannes Berg75636522008-07-09 14:40:35 +02001218 synchronize_rcu();
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001219 unregister_netdevice(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001220}
1221
Johannes Berg75636522008-07-09 14:40:35 +02001222/*
1223 * Remove all interfaces, may only be called at hardware unregistration
1224 * time because it doesn't do RCU-safe list removals.
1225 */
1226void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07001227{
Johannes Berg75636522008-07-09 14:40:35 +02001228 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001229 LIST_HEAD(unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001230
1231 ASSERT_RTNL();
1232
Eric Dumazetefe117a2009-11-05 11:06:40 +01001233 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001234 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1235 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001236
Javier Cardonaece1a2e2011-08-29 13:23:04 -07001237 if (ieee80211_vif_is_mesh(&sdata->vif))
1238 mesh_path_flush_by_iface(sdata);
1239
Eric Dumazetefe117a2009-11-05 11:06:40 +01001240 unregister_netdevice_queue(sdata->dev, &unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001241 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001242 mutex_unlock(&local->iflist_mtx);
1243 unregister_netdevice_many(&unreg_list);
Eric W. Biederman5f04d502011-02-20 11:49:45 -08001244 list_del(&unreg_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001245}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001246
1247static u32 ieee80211_idle_off(struct ieee80211_local *local,
1248 const char *reason)
1249{
1250 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1251 return 0;
1252
1253#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001254 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001255#endif
1256
1257 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1258 return IEEE80211_CONF_CHANGE_IDLE;
1259}
1260
1261static u32 ieee80211_idle_on(struct ieee80211_local *local)
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 now idle\n");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001268#endif
1269
Johannes Berga80f7c02009-12-23 13:15:32 +01001270 drv_flush(local, false);
1271
Johannes Berg5cff20e2009-04-29 12:26:17 +02001272 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1273 return IEEE80211_CONF_CHANGE_IDLE;
1274}
1275
1276u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1277{
1278 struct ieee80211_sub_if_data *sdata;
1279 int count = 0;
Johannes Berg21f83582010-12-18 17:20:47 +01001280 bool working = false, scanning = false, hw_roc = false;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001281 struct ieee80211_work *wk;
Johannes Berg67408c82010-11-30 08:59:23 +01001282 unsigned int led_trig_start = 0, led_trig_stop = 0;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001283
Johannes Berg7da7cc12010-08-05 17:02:38 +02001284#ifdef CONFIG_PROVE_LOCKING
1285 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1286 !lockdep_is_held(&local->iflist_mtx));
1287#endif
1288 lockdep_assert_held(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001289
1290 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg7da7cc12010-08-05 17:02:38 +02001291 if (!ieee80211_sdata_running(sdata)) {
1292 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001293 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001294 }
1295
1296 sdata->old_idle = sdata->vif.bss_conf.idle;
1297
Johannes Berg5cff20e2009-04-29 12:26:17 +02001298 /* do not count disabled managed interfaces */
1299 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
Johannes Berg7da7cc12010-08-05 17:02:38 +02001300 !sdata->u.mgd.associated) {
1301 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001302 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001303 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001304 /* do not count unused IBSS interfaces */
1305 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Berg7da7cc12010-08-05 17:02:38 +02001306 !sdata->u.ibss.ssid_len) {
1307 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001308 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001309 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001310 /* count everything else */
1311 count++;
1312 }
1313
Johannes Berg7da7cc12010-08-05 17:02:38 +02001314 list_for_each_entry(wk, &local->work_list, list) {
1315 working = true;
1316 wk->sdata->vif.bss_conf.idle = false;
1317 }
1318
1319 if (local->scan_sdata) {
1320 scanning = true;
1321 local->scan_sdata->vif.bss_conf.idle = false;
1322 }
1323
Johannes Berg21f83582010-12-18 17:20:47 +01001324 if (local->hw_roc_channel)
1325 hw_roc = true;
1326
Johannes Berg7da7cc12010-08-05 17:02:38 +02001327 list_for_each_entry(sdata, &local->interfaces, list) {
1328 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1329 continue;
1330 if (!ieee80211_sdata_running(sdata))
1331 continue;
1332 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1333 }
1334
Johannes Berg21f83582010-12-18 17:20:47 +01001335 if (working || scanning || hw_roc)
Johannes Berg67408c82010-11-30 08:59:23 +01001336 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1337 else
1338 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1339
1340 if (count)
1341 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1342 else
1343 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1344
1345 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1346
Johannes Berg21f83582010-12-18 17:20:47 +01001347 if (hw_roc)
1348 return ieee80211_idle_off(local, "hw remain-on-channel");
Johannes Berg7da7cc12010-08-05 17:02:38 +02001349 if (working)
1350 return ieee80211_idle_off(local, "working");
1351 if (scanning)
1352 return ieee80211_idle_off(local, "scanning");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001353 if (!count)
1354 return ieee80211_idle_on(local);
1355 else
1356 return ieee80211_idle_off(local, "in use");
1357
1358 return 0;
1359}
1360
1361void ieee80211_recalc_idle(struct ieee80211_local *local)
1362{
1363 u32 chg;
1364
1365 mutex_lock(&local->iflist_mtx);
1366 chg = __ieee80211_recalc_idle(local);
1367 mutex_unlock(&local->iflist_mtx);
Johannes Berg58905ca2009-05-07 14:23:01 +02001368 if (chg)
1369 ieee80211_hw_config(local, chg);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001370}
Johannes Berg47846c92009-11-25 17:46:19 +01001371
1372static int netdev_notify(struct notifier_block *nb,
1373 unsigned long state,
1374 void *ndev)
1375{
1376 struct net_device *dev = ndev;
1377 struct ieee80211_sub_if_data *sdata;
1378
1379 if (state != NETDEV_CHANGENAME)
1380 return 0;
1381
1382 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1383 return 0;
1384
1385 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1386 return 0;
1387
1388 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1389
Johannes Berg2f5265e2010-02-12 10:45:05 +01001390 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001391
1392 ieee80211_debugfs_rename_netdev(sdata);
1393 return 0;
1394}
1395
1396static struct notifier_block mac80211_netdev_notifier = {
1397 .notifier_call = netdev_notify,
1398};
1399
1400int ieee80211_iface_init(void)
1401{
1402 return register_netdevice_notifier(&mac80211_netdev_notifier);
1403}
1404
1405void ieee80211_iface_exit(void)
1406{
1407 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1408}