blob: ecf7d15eaa5e52ee4d3d5950f02c2868026bbb90 [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
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020045bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
46{
47 struct ieee80211_chanctx_conf *chanctx_conf;
48 int power;
49
50 rcu_read_lock();
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
52 if (!chanctx_conf) {
53 rcu_read_unlock();
54 return false;
55 }
56
Johannes Berg4bf88532012-11-09 11:39:59 +010057 power = chanctx_conf->def.chan->max_power;
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020058 rcu_read_unlock();
59
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
62
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
65
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
69 return true;
70 }
71
72 return false;
73}
74
75void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
76{
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
79}
Johannes Bergc771c9d2009-01-23 22:54:03 +010080
Johannes Bergcc45ae542012-06-21 22:30:52 +020081static u32 ieee80211_idle_off(struct ieee80211_local *local,
82 const char *reason)
83{
84 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
85 return 0;
86
87 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
88 return IEEE80211_CONF_CHANGE_IDLE;
89}
90
91static u32 ieee80211_idle_on(struct ieee80211_local *local)
92{
93 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
94 return 0;
95
96 drv_flush(local, false);
97
98 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
99 return IEEE80211_CONF_CHANGE_IDLE;
100}
101
102static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
103{
104 struct ieee80211_sub_if_data *sdata;
105 int count = 0;
106 bool working = false, scanning = false;
107 unsigned int led_trig_start = 0, led_trig_stop = 0;
108 struct ieee80211_roc_work *roc;
109
110#ifdef CONFIG_PROVE_LOCKING
111 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
112 !lockdep_is_held(&local->iflist_mtx));
113#endif
114 lockdep_assert_held(&local->mtx);
115
116 list_for_each_entry(sdata, &local->interfaces, list) {
117 if (!ieee80211_sdata_running(sdata)) {
118 sdata->vif.bss_conf.idle = true;
119 continue;
120 }
121
122 sdata->old_idle = sdata->vif.bss_conf.idle;
123
124 /* do not count disabled managed interfaces */
125 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
126 !sdata->u.mgd.associated &&
127 !sdata->u.mgd.auth_data &&
128 !sdata->u.mgd.assoc_data) {
129 sdata->vif.bss_conf.idle = true;
130 continue;
131 }
132 /* do not count unused IBSS interfaces */
133 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
134 !sdata->u.ibss.ssid_len) {
135 sdata->vif.bss_conf.idle = true;
136 continue;
137 }
Johannes Bergf142c6b2012-06-18 20:07:15 +0200138
139 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
140 continue;
141
Johannes Bergcc45ae542012-06-21 22:30:52 +0200142 /* count everything else */
143 sdata->vif.bss_conf.idle = false;
144 count++;
145 }
146
147 if (!local->ops->remain_on_channel) {
148 list_for_each_entry(roc, &local->roc_list, list) {
149 working = true;
150 roc->sdata->vif.bss_conf.idle = false;
151 }
152 }
153
Johannes Berge2fd5dbc2012-07-06 21:39:28 +0200154 sdata = rcu_dereference_protected(local->scan_sdata,
155 lockdep_is_held(&local->mtx));
156 if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
Johannes Bergcc45ae542012-06-21 22:30:52 +0200157 scanning = true;
Johannes Berge2fd5dbc2012-07-06 21:39:28 +0200158 sdata->vif.bss_conf.idle = false;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200159 }
160
161 list_for_each_entry(sdata, &local->interfaces, list) {
162 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
Johannes Bergf142c6b2012-06-18 20:07:15 +0200163 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
164 sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
Johannes Bergcc45ae542012-06-21 22:30:52 +0200165 continue;
166 if (sdata->old_idle == sdata->vif.bss_conf.idle)
167 continue;
168 if (!ieee80211_sdata_running(sdata))
169 continue;
170 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
171 }
172
173 if (working || scanning)
174 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
175 else
176 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
177
178 if (count)
179 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
180 else
181 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
182
183 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
184
185 if (working)
186 return ieee80211_idle_off(local, "working");
187 if (scanning)
188 return ieee80211_idle_off(local, "scanning");
189 if (!count)
190 return ieee80211_idle_on(local);
191 else
192 return ieee80211_idle_off(local, "in use");
193
194 return 0;
195}
196
197void ieee80211_recalc_idle(struct ieee80211_local *local)
198{
199 u32 chg;
200
201 mutex_lock(&local->iflist_mtx);
202 chg = __ieee80211_recalc_idle(local);
203 mutex_unlock(&local->iflist_mtx);
204 if (chg)
205 ieee80211_hw_config(local, chg);
206}
207
Johannes Berg0d143fe2008-09-11 00:01:59 +0200208static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
209{
Chaitanya09b14262012-12-21 17:15:17 +0530210 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200211 return -EINVAL;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200212
Johannes Berg0d143fe2008-09-11 00:01:59 +0200213 dev->mtu = new_mtu;
214 return 0;
215}
216
Helmut Schaa478622e2012-11-27 18:23:06 +0100217static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
218{
219 struct ieee80211_sub_if_data *sdata;
220 u64 new, mask, tmp;
221 u8 *m;
222 int ret = 0;
223
224 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
225 return 0;
226
227 m = addr;
228 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
229 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
230 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
231
232 m = local->hw.wiphy->addr_mask;
233 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
234 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
235 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
236
237
238 mutex_lock(&local->iflist_mtx);
239 list_for_each_entry(sdata, &local->interfaces, list) {
240 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
241 continue;
242
243 m = sdata->vif.addr;
244 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
245 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
246 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
247
248 if ((new & ~mask) != (tmp & ~mask)) {
249 ret = -EINVAL;
250 break;
251 }
252 }
253 mutex_unlock(&local->iflist_mtx);
254
255 return ret;
256}
257
Johannes Berg47846c92009-11-25 17:46:19 +0100258static int ieee80211_change_mac(struct net_device *dev, void *addr)
259{
260 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Kalle Valofc5f7572009-12-30 15:54:03 +0200261 struct sockaddr *sa = addr;
Johannes Berg47846c92009-11-25 17:46:19 +0100262 int ret;
263
Johannes Berg9607e6b2009-12-23 13:15:31 +0100264 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100265 return -EBUSY;
266
Helmut Schaa478622e2012-11-27 18:23:06 +0100267 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
268 if (ret)
269 return ret;
270
Kalle Valofc5f7572009-12-30 15:54:03 +0200271 ret = eth_mac_addr(dev, sa);
Johannes Berg47846c92009-11-25 17:46:19 +0100272
273 if (ret == 0)
Kalle Valofc5f7572009-12-30 15:54:03 +0200274 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100275
276 return ret;
277}
278
Johannes Berg0d143fe2008-09-11 00:01:59 +0200279static inline int identical_mac_addr_allowed(int type1, int type2)
280{
281 return type1 == NL80211_IFTYPE_MONITOR ||
282 type2 == NL80211_IFTYPE_MONITOR ||
Johannes Bergf142c6b2012-06-18 20:07:15 +0200283 type1 == NL80211_IFTYPE_P2P_DEVICE ||
284 type2 == NL80211_IFTYPE_P2P_DEVICE ||
Johannes Berg0d143fe2008-09-11 00:01:59 +0200285 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
286 (type1 == NL80211_IFTYPE_WDS &&
287 (type2 == NL80211_IFTYPE_WDS ||
288 type2 == NL80211_IFTYPE_AP)) ||
289 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
290 (type1 == NL80211_IFTYPE_AP_VLAN &&
291 (type2 == NL80211_IFTYPE_AP ||
292 type2 == NL80211_IFTYPE_AP_VLAN));
293}
294
Johannes Berg87490f62010-08-27 12:35:57 +0200295static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
296 enum nl80211_iftype iftype)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200297{
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200298 struct ieee80211_local *local = sdata->local;
Johannes Berg87490f62010-08-27 12:35:57 +0200299 struct ieee80211_sub_if_data *nsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200300
Johannes Berg87490f62010-08-27 12:35:57 +0200301 ASSERT_RTNL();
Johannes Berg0d143fe2008-09-11 00:01:59 +0200302
303 /* we hold the RTNL here so can safely walk the list */
304 list_for_each_entry(nsdata, &local->interfaces, list) {
Johannes Berg371a2552012-06-19 15:54:05 +0200305 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200306 /*
307 * Allow only a single IBSS interface to be up at any
308 * time. This is restricted because beacon distribution
309 * cannot work properly if both are in the same IBSS.
310 *
311 * To remove this restriction we'd have to disallow them
312 * from setting the same SSID on different IBSS interfaces
313 * belonging to the same hardware. Then, however, we're
314 * faced with having to adopt two different TSF timers...
315 */
Johannes Berg87490f62010-08-27 12:35:57 +0200316 if (iftype == NL80211_IFTYPE_ADHOC &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200317 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
318 return -EBUSY;
319
320 /*
321 * The remaining checks are only performed for interfaces
322 * with the same MAC address.
323 */
Johannes Berg371a2552012-06-19 15:54:05 +0200324 if (!ether_addr_equal(sdata->vif.addr,
325 nsdata->vif.addr))
Johannes Berg0d143fe2008-09-11 00:01:59 +0200326 continue;
327
328 /*
329 * check whether it may have the same address
330 */
Johannes Berg87490f62010-08-27 12:35:57 +0200331 if (!identical_mac_addr_allowed(iftype,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200332 nsdata->vif.type))
333 return -ENOTUNIQ;
334
335 /*
336 * can only add VLANs to enabled APs
337 */
Johannes Berg87490f62010-08-27 12:35:57 +0200338 if (iftype == NL80211_IFTYPE_AP_VLAN &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200339 nsdata->vif.type == NL80211_IFTYPE_AP)
340 sdata->bss = &nsdata->u.ap;
341 }
342 }
343
Johannes Berg87490f62010-08-27 12:35:57 +0200344 return 0;
345}
346
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200347static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
348{
349 int n_queues = sdata->local->hw.queues;
350 int i;
351
Ilan Peer0ef24e52012-08-21 12:43:35 +0300352 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
353 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
354 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
355 IEEE80211_INVAL_HW_QUEUE))
356 return -EINVAL;
357 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
358 n_queues))
359 return -EINVAL;
360 }
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200361 }
362
Luciano Coelhobb3e10f2012-04-12 16:09:49 +0300363 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
364 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200365 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
366 return 0;
367 }
368
369 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
370 return -EINVAL;
371
372 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
373 return -EINVAL;
374
375 return 0;
376}
377
Christian Lamparter85416a42010-10-02 13:17:07 +0200378void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
379 const int offset)
380{
381 struct ieee80211_local *local = sdata->local;
382 u32 flags = sdata->u.mntr_flags;
383
384#define ADJUST(_f, _s) do { \
385 if (flags & MONITOR_FLAG_##_f) \
386 local->fif_##_s += offset; \
387 } while (0)
388
389 ADJUST(FCSFAIL, fcsfail);
390 ADJUST(PLCPFAIL, plcpfail);
391 ADJUST(CONTROL, control);
392 ADJUST(CONTROL, pspoll);
393 ADJUST(OTHER_BSS, other_bss);
394
395#undef ADJUST
396}
397
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200398static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
399{
400 struct ieee80211_local *local = sdata->local;
401 int i;
402
403 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
404 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
405 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
Johannes Berga9d3c052012-05-07 17:45:29 +0200406 else if (local->hw.queues >= IEEE80211_NUM_ACS)
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200407 sdata->vif.hw_queue[i] = i;
Johannes Berga9d3c052012-05-07 17:45:29 +0200408 else
409 sdata->vif.hw_queue[i] = 0;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200410 }
411 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
412}
413
Johannes Berg075e0842012-07-12 19:28:31 +0200414static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200415{
416 struct ieee80211_sub_if_data *sdata;
Johannes Berg685fb722012-07-11 16:38:09 +0200417 int ret = 0;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200418
419 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
420 return 0;
421
Johannes Berg685fb722012-07-11 16:38:09 +0200422 mutex_lock(&local->iflist_mtx);
423
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200424 if (local->monitor_sdata)
Johannes Berg685fb722012-07-11 16:38:09 +0200425 goto out_unlock;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200426
427 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
Johannes Berg685fb722012-07-11 16:38:09 +0200428 if (!sdata) {
429 ret = -ENOMEM;
430 goto out_unlock;
431 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200432
433 /* set up data */
434 sdata->local = local;
435 sdata->vif.type = NL80211_IFTYPE_MONITOR;
436 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
437 wiphy_name(local->hw.wiphy));
438
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200439 ieee80211_set_default_queues(sdata);
440
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200441 ret = drv_add_interface(local, sdata);
442 if (WARN_ON(ret)) {
443 /* ok .. stupid driver, it asked for this! */
444 kfree(sdata);
Johannes Berg685fb722012-07-11 16:38:09 +0200445 goto out_unlock;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200446 }
447
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200448 ret = ieee80211_check_queues(sdata);
449 if (ret) {
450 kfree(sdata);
Johannes Berg685fb722012-07-11 16:38:09 +0200451 goto out_unlock;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200452 }
453
Johannes Berg4bf88532012-11-09 11:39:59 +0100454 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
Johannes Berg55de9082012-07-26 17:24:39 +0200455 IEEE80211_CHANCTX_EXCLUSIVE);
456 if (ret) {
457 drv_remove_interface(local, sdata);
458 kfree(sdata);
459 goto out_unlock;
460 }
461
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200462 rcu_assign_pointer(local->monitor_sdata, sdata);
Johannes Berg685fb722012-07-11 16:38:09 +0200463 out_unlock:
464 mutex_unlock(&local->iflist_mtx);
465 return ret;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200466}
467
Johannes Berg075e0842012-07-12 19:28:31 +0200468static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200469{
470 struct ieee80211_sub_if_data *sdata;
471
472 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
473 return;
474
Johannes Berg685fb722012-07-11 16:38:09 +0200475 mutex_lock(&local->iflist_mtx);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200476
Johannes Berg685fb722012-07-11 16:38:09 +0200477 sdata = rcu_dereference_protected(local->monitor_sdata,
478 lockdep_is_held(&local->iflist_mtx));
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200479 if (!sdata)
Johannes Berg685fb722012-07-11 16:38:09 +0200480 goto out_unlock;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200481
482 rcu_assign_pointer(local->monitor_sdata, NULL);
483 synchronize_net();
484
Johannes Berg55de9082012-07-26 17:24:39 +0200485 ieee80211_vif_release_channel(sdata);
486
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200487 drv_remove_interface(local, sdata);
488
489 kfree(sdata);
Johannes Berg685fb722012-07-11 16:38:09 +0200490 out_unlock:
491 mutex_unlock(&local->iflist_mtx);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200492}
493
Johannes Berg34d4bc42010-08-27 12:35:58 +0200494/*
495 * NOTE: Be very careful when changing this function, it must NOT return
496 * an error on interface type changes that have been pre-checked, so most
497 * checks should be in ieee80211_check_concurrent_iface.
498 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200499int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
Johannes Berg87490f62010-08-27 12:35:57 +0200500{
Johannes Bergf142c6b2012-06-18 20:07:15 +0200501 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
502 struct net_device *dev = wdev->netdev;
Johannes Berg87490f62010-08-27 12:35:57 +0200503 struct ieee80211_local *local = sdata->local;
504 struct sta_info *sta;
505 u32 changed = 0;
506 int res;
507 u32 hw_reconf_flags = 0;
508
Johannes Berg0d143fe2008-09-11 00:01:59 +0200509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_WDS:
511 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
512 return -ENOLINK;
513 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100514 case NL80211_IFTYPE_AP_VLAN: {
515 struct ieee80211_sub_if_data *master;
516
Johannes Berg0d143fe2008-09-11 00:01:59 +0200517 if (!sdata->bss)
518 return -ENOLINK;
Johannes Berg665c93a2011-11-04 11:18:11 +0100519
Johannes Berg0d143fe2008-09-11 00:01:59 +0200520 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
Johannes Berg665c93a2011-11-04 11:18:11 +0100521
522 master = container_of(sdata->bss,
523 struct ieee80211_sub_if_data, u.ap);
524 sdata->control_port_protocol =
525 master->control_port_protocol;
526 sdata->control_port_no_encrypt =
527 master->control_port_no_encrypt;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200528 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100529 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200530 case NL80211_IFTYPE_AP:
531 sdata->bss = &sdata->u.ap;
532 break;
533 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200534 case NL80211_IFTYPE_STATION:
535 case NL80211_IFTYPE_MONITOR:
536 case NL80211_IFTYPE_ADHOC:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200537 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200538 /* no special treatment */
539 break;
540 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200541 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200542 case NL80211_IFTYPE_P2P_CLIENT:
543 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200544 /* cannot happen */
545 WARN_ON(1);
546 break;
547 }
548
549 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200550 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200551 if (res)
552 goto err_del_bss;
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400553 if (local->ops->napi_poll)
554 napi_enable(&local->napi);
Johannes Berge8975582008-10-09 12:18:51 +0200555 /* we're brought up, everything changes */
556 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200557 ieee80211_led_radio(local, true);
Johannes Berg67408c82010-11-30 08:59:23 +0100558 ieee80211_mod_tpt_led_trig(local,
559 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200560 }
561
562 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200563 * Copy the hopefully now-present MAC address to
564 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200565 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200566 if (dev && is_zero_ether_addr(dev->dev_addr)) {
Johannes Bergbf533e02010-08-27 12:35:56 +0200567 memcpy(dev->dev_addr,
568 local->hw.wiphy->perm_addr,
569 ETH_ALEN);
570 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200571
Johannes Bergbf533e02010-08-27 12:35:56 +0200572 if (!is_valid_ether_addr(dev->dev_addr)) {
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200573 res = -EADDRNOTAVAIL;
574 goto err_stop;
John W. Linville0adc23f2009-10-06 16:27:18 -0400575 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200576 }
577
Johannes Berg0d143fe2008-09-11 00:01:59 +0200578 switch (sdata->vif.type) {
579 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg4d76d212012-12-11 20:38:41 +0100580 /* no need to tell driver, but set carrier and chanctx */
581 if (rtnl_dereference(sdata->bss->beacon)) {
582 ieee80211_vif_vlan_copy_chanctx(sdata);
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200583 netif_carrier_on(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100584 } else {
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200585 netif_carrier_off(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100586 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200587 break;
588 case NL80211_IFTYPE_MONITOR:
589 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
590 local->cooked_mntrs++;
591 break;
592 }
593
Johannes Berg075e0842012-07-12 19:28:31 +0200594 if (local->monitors == 0 && local->open_count == 0) {
595 res = ieee80211_add_virtual_monitor(local);
596 if (res)
597 goto err_stop;
598 }
599
Johannes Berg0d143fe2008-09-11 00:01:59 +0200600 /* must be before the call to ieee80211_configure_filter */
601 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200602 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100603 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
604 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200605 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200606
Christian Lamparter85416a42010-10-02 13:17:07 +0200607 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200608 ieee80211_configure_filter(local);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200609
610 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200611 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200612 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200613 if (coming_up) {
Johannes Berg075e0842012-07-12 19:28:31 +0200614 ieee80211_del_virtual_monitor(local);
615
Johannes Berg7b7eab62011-11-03 14:41:13 +0100616 res = drv_add_interface(local, sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200617 if (res)
618 goto err_stop;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200619 res = ieee80211_check_queues(sdata);
620 if (res)
621 goto err_del_interface;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200622 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200623
Johannes Berg29cbe682010-12-03 09:20:44 +0100624 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400625 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200626 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400627
Igor Perminove3b90ca2009-08-04 16:48:51 +0400628 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200629 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
630 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700631 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400632
Johannes Bergf142c6b2012-06-18 20:07:15 +0200633 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
634 changed |= ieee80211_reset_erp_info(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200635 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200636
Johannes Bergc405c622012-07-30 19:44:12 +0200637 switch (sdata->vif.type) {
638 case NL80211_IFTYPE_STATION:
639 case NL80211_IFTYPE_ADHOC:
640 case NL80211_IFTYPE_AP:
641 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200642 netif_carrier_off(dev);
Johannes Bergc405c622012-07-30 19:44:12 +0200643 break;
Johannes Berg1411af12012-07-30 19:48:09 +0200644 case NL80211_IFTYPE_WDS:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200645 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berg1411af12012-07-30 19:48:09 +0200646 break;
Johannes Bergc405c622012-07-30 19:44:12 +0200647 default:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200648 netif_carrier_on(dev);
Johannes Bergc405c622012-07-30 19:44:12 +0200649 }
Eliad Peller59034592011-10-16 10:57:31 +0200650
651 /*
652 * set default queue parameters so drivers don't
653 * need to initialise the hardware if the hardware
654 * doesn't start up with sane defaults
655 */
Johannes Berg3abead52012-03-02 15:56:59 +0100656 ieee80211_set_wmm_default(sdata, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200657 }
658
Johannes Berg2d2080c2010-09-15 15:13:13 +0200659 set_bit(SDATA_STATE_RUNNING, &sdata->state);
660
Johannes Berg0d143fe2008-09-11 00:01:59 +0200661 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
662 /* Create STA entry for the WDS peer */
663 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
664 GFP_KERNEL);
665 if (!sta) {
666 res = -ENOMEM;
667 goto err_del_interface;
668 }
669
Johannes Berg83d5cc02012-01-12 09:31:10 +0100670 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
671 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
672 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200673
674 res = sta_info_insert(sta);
675 if (res) {
676 /* STA has been freed */
677 goto err_del_interface;
678 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400679
680 rate_control_rate_init(sta);
Johannes Berg1411af12012-07-30 19:48:09 +0200681 netif_carrier_on(dev);
Johannes Bergf142c6b2012-06-18 20:07:15 +0200682 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
683 rcu_assign_pointer(local->p2p_sdata, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200684 }
685
Johannes Berg0d143fe2008-09-11 00:01:59 +0200686 /*
687 * set_multicast_list will be invoked by the networking core
688 * which will check whether any increments here were done in
689 * error and sync them down to the hardware as filter flags.
690 */
691 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
692 atomic_inc(&local->iff_allmultis);
693
694 if (sdata->flags & IEEE80211_SDATA_PROMISC)
695 atomic_inc(&local->iff_promiscs);
696
Johannes Berg7da7cc12010-08-05 17:02:38 +0200697 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200698 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200699 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200700
Johannes Berg34d4bc42010-08-27 12:35:58 +0200701 if (coming_up)
702 local->open_count++;
703
Eliad Peller59034592011-10-16 10:57:31 +0200704 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200705 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200706
Johannes Berg10f644a2009-04-16 13:17:25 +0200707 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200708
Johannes Bergf142c6b2012-06-18 20:07:15 +0200709 if (dev)
710 netif_tx_start_all_queues(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200711
712 return 0;
713 err_del_interface:
Johannes Berg7b7eab62011-11-03 14:41:13 +0100714 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200715 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200716 if (!local->open_count)
717 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200718 err_del_bss:
719 sdata->bss = NULL;
720 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
721 list_del(&sdata->u.vlan.list);
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200722 /* might already be clear but that doesn't matter */
Johannes Berg2d2080c2010-09-15 15:13:13 +0200723 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200724 return res;
725}
726
Johannes Berg34d4bc42010-08-27 12:35:58 +0200727static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200728{
729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200730 int err;
731
732 /* fail early if user set an invalid address */
Mohammed Shafi Shajakhan2fcf28242011-07-12 15:19:04 +0530733 if (!is_valid_ether_addr(dev->dev_addr))
Johannes Berg34d4bc42010-08-27 12:35:58 +0200734 return -EADDRNOTAVAIL;
735
736 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
737 if (err)
738 return err;
739
Johannes Bergf142c6b2012-06-18 20:07:15 +0200740 return ieee80211_do_open(&sdata->wdev, true);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200741}
742
743static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
744 bool going_down)
745{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200746 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200747 unsigned long flags;
748 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200749 u32 hw_reconf_flags = 0;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200750 int i;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200751
Rajkumar Manoharanc29acf22011-05-14 09:43:28 +0530752 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
753
Johannes Berge2fd5dbc2012-07-06 21:39:28 +0200754 if (rcu_access_pointer(local->scan_sdata) == sdata)
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700755 ieee80211_scan_cancel(local);
756
Johannes Berg0d143fe2008-09-11 00:01:59 +0200757 /*
758 * Stop TX on this interface first.
759 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200760 if (sdata->dev)
761 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200762
Johannes Berg2eb278e2012-06-05 14:28:42 +0200763 ieee80211_roc_purge(sdata);
Johannes Bergaf6b6372009-12-23 13:15:35 +0100764
765 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200766 * Remove all stations associated with this interface.
767 *
768 * This must be done before calling ops->remove_interface()
769 * because otherwise we can later invoke ops->sta_notify()
770 * whenever the STAs are removed, and that invalidates driver
771 * assumptions about always getting a vif pointer that is valid
772 * (because if we remove a STA after ops->remove_interface()
773 * the driver will have removed the vif info already!)
774 *
Johannes Bergb9dcf712010-08-27 12:35:54 +0200775 * This is relevant only in AP, WDS and mesh modes, since in
776 * all other modes we've already removed all stations when
777 * disconnecting etc.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200778 */
Johannes Bergb998e8b2012-12-13 23:07:46 +0100779 sta_info_flush(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200780
781 /*
782 * Don't count this interface for promisc/allmulti while it
783 * is down. dev_mc_unsync() will invoke set_multicast_list
784 * on the master interface which will sync these down to the
785 * hardware as filter flags.
786 */
787 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
788 atomic_dec(&local->iff_allmultis);
789
790 if (sdata->flags & IEEE80211_SDATA_PROMISC)
791 atomic_dec(&local->iff_promiscs);
792
Johannes Berg7be50862010-10-13 12:06:24 +0200793 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400794 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200795 local->fif_probe_req--;
796 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
797 local->fif_probe_req--;
798 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400799
Johannes Bergf142c6b2012-06-18 20:07:15 +0200800 if (sdata->dev) {
801 netif_addr_lock_bh(sdata->dev);
802 spin_lock_bh(&local->filter_lock);
803 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
804 sdata->dev->addr_len);
805 spin_unlock_bh(&local->filter_lock);
806 netif_addr_unlock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200807
Johannes Bergf142c6b2012-06-18 20:07:15 +0200808 ieee80211_configure_filter(local);
809 }
Johannes Berg3ac64be2009-08-17 16:16:53 +0200810
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800811 del_timer_sync(&local->dynamic_ps_timer);
812 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200813
Johannes Berg04ecd252012-09-11 14:34:12 +0200814 cancel_work_sync(&sdata->recalc_smps);
815
Johannes Berg0d143fe2008-09-11 00:01:59 +0200816 /* APs need special treatment */
817 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200818 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200819
820 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200821 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200822 u.vlan.list)
823 dev_close(vlan->dev);
824 WARN_ON(!list_empty(&sdata->u.ap.vlans));
Eliad Pellerafa762f2012-04-23 14:45:15 +0300825 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
826 ieee80211_mgd_stop(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200827 }
828
Johannes Berg34d4bc42010-08-27 12:35:58 +0200829 if (going_down)
830 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200831
832 switch (sdata->vif.type) {
833 case NL80211_IFTYPE_AP_VLAN:
834 list_del(&sdata->u.vlan.list);
Johannes Berg4d76d212012-12-11 20:38:41 +0100835 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200836 /* no need to tell driver */
837 break;
838 case NL80211_IFTYPE_MONITOR:
839 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
840 local->cooked_mntrs--;
841 break;
842 }
843
844 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200845 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100846 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
847 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berg075e0842012-07-12 19:28:31 +0200848 ieee80211_del_virtual_monitor(local);
Johannes Berge8975582008-10-09 12:18:51 +0200849 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200850
Christian Lamparter85416a42010-10-02 13:17:07 +0200851 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200852 ieee80211_configure_filter(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200853 break;
Johannes Bergf142c6b2012-06-18 20:07:15 +0200854 case NL80211_IFTYPE_P2P_DEVICE:
855 /* relies on synchronize_rcu() below */
856 rcu_assign_pointer(local->p2p_sdata, NULL);
857 /* fall through */
Johannes Berg0d143fe2008-09-11 00:01:59 +0200858 default:
Johannes Berg0b7dff42012-12-05 09:49:14 +0100859 cancel_work_sync(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200860 /*
861 * When we get here, the interface is marked down.
Johannes Berg97f97b12012-12-13 22:54:58 +0100862 * Call synchronize_rcu() to wait for the RX path
Johannes Berg35f20c12010-06-10 10:21:30 +0200863 * should it be using the interface and enqueuing
Johannes Berg97f97b12012-12-13 22:54:58 +0100864 * frames at this very time on another CPU.
Johannes Berg35f20c12010-06-10 10:21:30 +0200865 */
Johannes Berg97f97b12012-12-13 22:54:58 +0100866 synchronize_rcu();
Johannes Berg35f20c12010-06-10 10:21:30 +0200867 skb_queue_purge(&sdata->skb_queue);
868
Bob Copeland97af7432009-07-29 10:13:03 +0200869 /*
Johannes Bergb9dcf712010-08-27 12:35:54 +0200870 * Free all remaining keys, there shouldn't be any,
871 * except maybe group keys in AP more or WDS?
872 */
Johannes Bergad0e2b52010-06-01 10:19:19 +0200873 ieee80211_free_keys(sdata);
Johannes Bergb9dcf712010-08-27 12:35:54 +0200874
Johannes Berg34d4bc42010-08-27 12:35:58 +0200875 if (going_down)
Johannes Berg7b7eab62011-11-03 14:41:13 +0100876 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200877 }
878
879 sdata->bss = NULL;
880
Johannes Berg7da7cc12010-08-05 17:02:38 +0200881 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200882 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200883 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200884
885 ieee80211_recalc_ps(local, -1);
886
Johannes Berg0d143fe2008-09-11 00:01:59 +0200887 if (local->open_count == 0) {
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400888 if (local->ops->napi_poll)
889 napi_disable(&local->napi);
Johannes Bergea77f122009-08-21 14:44:45 +0200890 ieee80211_clear_tx_pending(local);
Johannes Berg84f6a012009-08-20 20:02:20 +0200891 ieee80211_stop_device(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200892
Johannes Berge8975582008-10-09 12:18:51 +0200893 /* no reconfiguring after stop! */
894 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200895 }
896
Johannes Berge8975582008-10-09 12:18:51 +0200897 /* do after stop to avoid reconfiguring when we stop anyway */
Johannes Berg55de9082012-07-26 17:24:39 +0200898 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200899 ieee80211_hw_config(local, hw_reconf_flags);
900
Johannes Berg5061b0c2009-07-14 00:33:34 +0200901 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
902 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
903 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
904 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
905 if (info->control.vif == &sdata->vif) {
906 __skb_unlink(skb, &local->pending[i]);
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200907 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200908 }
909 }
910 }
911 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg075e0842012-07-12 19:28:31 +0200912
913 if (local->monitors == local->open_count && local->monitors > 0)
914 ieee80211_add_virtual_monitor(local);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200915}
916
917static int ieee80211_stop(struct net_device *dev)
918{
919 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
920
921 ieee80211_do_stop(sdata, true);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200922
Johannes Berg0d143fe2008-09-11 00:01:59 +0200923 return 0;
924}
925
926static void ieee80211_set_multicast_list(struct net_device *dev)
927{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200928 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200929 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200930 int allmulti, promisc, sdata_allmulti, sdata_promisc;
931
932 allmulti = !!(dev->flags & IFF_ALLMULTI);
933 promisc = !!(dev->flags & IFF_PROMISC);
934 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
935 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
936
937 if (allmulti != sdata_allmulti) {
938 if (dev->flags & IFF_ALLMULTI)
939 atomic_inc(&local->iff_allmultis);
940 else
941 atomic_dec(&local->iff_allmultis);
942 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
943 }
944
945 if (promisc != sdata_promisc) {
946 if (dev->flags & IFF_PROMISC)
947 atomic_inc(&local->iff_promiscs);
948 else
949 atomic_dec(&local->iff_promiscs);
950 sdata->flags ^= IEEE80211_SDATA_PROMISC;
951 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200952 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000953 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200954 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +0200955 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200956}
957
Johannes Berg75636522008-07-09 14:40:35 +0200958/*
959 * Called when the netdev is removed or, by the code below, before
960 * the interface type changes.
961 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200962static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -0700963{
Johannes Berg75636522008-07-09 14:40:35 +0200964 int flushed;
Jiri Bencf0706e82007-05-05 11:45:53 -0700965 int i;
966
Johannes Berg75636522008-07-09 14:40:35 +0200967 /* free extra data */
968 ieee80211_free_keys(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700969
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200970 ieee80211_debugfs_remove_netdev(sdata);
971
Johannes Berg988c0f72008-04-17 19:21:22 +0200972 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -0700973 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200974 sdata->fragment_next = 0;
975
Johannes Bergb9dcf712010-08-27 12:35:54 +0200976 if (ieee80211_vif_is_mesh(&sdata->vif))
977 mesh_rmc_free(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200978
Johannes Bergb998e8b2012-12-13 23:07:46 +0100979 flushed = sta_info_flush(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200980 WARN_ON(flushed);
Jiri Bencf0706e82007-05-05 11:45:53 -0700981}
982
Johannes Bergf142c6b2012-06-18 20:07:15 +0200983static void ieee80211_uninit(struct net_device *dev)
984{
985 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
986}
987
Johannes Bergcf0277e2010-01-05 18:00:58 +0100988static u16 ieee80211_netdev_select_queue(struct net_device *dev,
989 struct sk_buff *skb)
990{
991 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
992}
993
Johannes Berg587e7292009-01-30 13:35:22 +0100994static const struct net_device_ops ieee80211_dataif_ops = {
995 .ndo_open = ieee80211_open,
996 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +0200997 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +0100998 .ndo_start_xmit = ieee80211_subif_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000999 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +01001000 .ndo_change_mtu = ieee80211_change_mtu,
Johannes Berg47846c92009-11-25 17:46:19 +01001001 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +01001002 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +01001003};
1004
Johannes Bergcf0277e2010-01-05 18:00:58 +01001005static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1006 struct sk_buff *skb)
1007{
1008 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1009 struct ieee80211_local *local = sdata->local;
1010 struct ieee80211_hdr *hdr;
1011 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1012
Johannes Berg32c50572012-03-28 11:04:29 +02001013 if (local->hw.queues < IEEE80211_NUM_ACS)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001014 return 0;
1015
1016 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +01001017 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001018 return 0; /* doesn't matter, frame will be dropped */
1019
Johannes Bergb49bb572010-01-08 19:00:00 +01001020 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +01001021
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001022 return ieee80211_select_queue_80211(sdata, skb, hdr);
Johannes Bergcf0277e2010-01-05 18:00:58 +01001023}
1024
Johannes Berg587e7292009-01-30 13:35:22 +01001025static const struct net_device_ops ieee80211_monitorif_ops = {
1026 .ndo_open = ieee80211_open,
1027 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001028 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +01001029 .ndo_start_xmit = ieee80211_monitor_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +00001030 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +01001031 .ndo_change_mtu = ieee80211_change_mtu,
1032 .ndo_set_mac_address = eth_mac_addr,
Johannes Bergcf0277e2010-01-05 18:00:58 +01001033 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +01001034};
1035
1036static void ieee80211_if_setup(struct net_device *dev)
1037{
1038 ether_setup(dev);
Neil Horman550fd082011-07-26 06:05:38 +00001039 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Johannes Berg587e7292009-01-30 13:35:22 +01001040 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg587e7292009-01-30 13:35:22 +01001041 dev->destructor = free_netdev;
1042}
1043
Johannes Berg1fa57d02010-06-10 10:21:32 +02001044static void ieee80211_iface_work(struct work_struct *work)
1045{
1046 struct ieee80211_sub_if_data *sdata =
1047 container_of(work, struct ieee80211_sub_if_data, work);
1048 struct ieee80211_local *local = sdata->local;
1049 struct sk_buff *skb;
Johannes Berg344eec62010-06-10 10:21:36 +02001050 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +02001051 struct ieee80211_ra_tid *ra_tid;
Johannes Berg1fa57d02010-06-10 10:21:32 +02001052
1053 if (!ieee80211_sdata_running(sdata))
1054 return;
1055
1056 if (local->scanning)
1057 return;
1058
1059 /*
1060 * ieee80211_queue_work() should have picked up most cases,
1061 * here we'll pick the rest.
1062 */
1063 if (WARN(local->suspended,
1064 "interface work scheduled while going to suspend\n"))
1065 return;
1066
1067 /* first process frames */
1068 while ((skb = skb_dequeue(&sdata->skb_queue))) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001069 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1070
Johannes Bergc1475ca2010-06-10 10:21:37 +02001071 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1072 ra_tid = (void *)&skb->cb;
1073 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1074 ra_tid->tid);
1075 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1076 ra_tid = (void *)&skb->cb;
1077 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1078 ra_tid->tid);
1079 } else if (ieee80211_is_action(mgmt->frame_control) &&
1080 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001081 int len = skb->len;
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001082
Johannes Berga93e3642010-06-10 10:21:46 +02001083 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001084 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001085 if (sta) {
1086 switch (mgmt->u.action.u.addba_req.action_code) {
1087 case WLAN_ACTION_ADDBA_REQ:
1088 ieee80211_process_addba_request(
1089 local, sta, mgmt, len);
1090 break;
1091 case WLAN_ACTION_ADDBA_RESP:
1092 ieee80211_process_addba_resp(local, sta,
1093 mgmt, len);
1094 break;
1095 case WLAN_ACTION_DELBA:
1096 ieee80211_process_delba(sdata, sta,
1097 mgmt, len);
1098 break;
1099 default:
1100 WARN_ON(1);
1101 break;
1102 }
1103 }
Johannes Berga93e3642010-06-10 10:21:46 +02001104 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +02001105 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1106 struct ieee80211_hdr *hdr = (void *)mgmt;
1107 /*
1108 * So the frame isn't mgmt, but frame_control
1109 * is at the right place anyway, of course, so
1110 * the if statement is correct.
1111 *
1112 * Warn if we have other data frame types here,
1113 * they must not get here.
1114 */
1115 WARN_ON(hdr->frame_control &
1116 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1117 WARN_ON(!(hdr->seq_ctrl &
1118 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1119 /*
1120 * This was a fragment of a frame, received while
1121 * a block-ack session was active. That cannot be
1122 * right, so terminate the session.
1123 */
Johannes Berga93e3642010-06-10 10:21:46 +02001124 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001125 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +02001126 if (sta) {
1127 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1128 IEEE80211_QOS_CTL_TID_MASK;
1129
1130 __ieee80211_stop_rx_ba_session(
1131 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +02001132 WLAN_REASON_QSTA_REQUIRE_SETUP,
1133 true);
Johannes Berg344eec62010-06-10 10:21:36 +02001134 }
Johannes Berga93e3642010-06-10 10:21:46 +02001135 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001136 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +02001137 case NL80211_IFTYPE_STATION:
1138 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1139 break;
1140 case NL80211_IFTYPE_ADHOC:
1141 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1142 break;
1143 case NL80211_IFTYPE_MESH_POINT:
1144 if (!ieee80211_vif_is_mesh(&sdata->vif))
1145 break;
1146 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1147 break;
1148 default:
1149 WARN(1, "frame for unexpected interface type");
Johannes Berg1fa57d02010-06-10 10:21:32 +02001150 break;
1151 }
Johannes Berg36b3a622010-06-10 10:21:33 +02001152
1153 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001154 }
1155
1156 /* then other type-dependent work */
1157 switch (sdata->vif.type) {
1158 case NL80211_IFTYPE_STATION:
1159 ieee80211_sta_work(sdata);
1160 break;
1161 case NL80211_IFTYPE_ADHOC:
1162 ieee80211_ibss_work(sdata);
1163 break;
1164 case NL80211_IFTYPE_MESH_POINT:
1165 if (!ieee80211_vif_is_mesh(&sdata->vif))
1166 break;
1167 ieee80211_mesh_work(sdata);
1168 break;
1169 default:
1170 break;
1171 }
1172}
1173
Johannes Berg04ecd252012-09-11 14:34:12 +02001174static void ieee80211_recalc_smps_work(struct work_struct *work)
1175{
1176 struct ieee80211_sub_if_data *sdata =
1177 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1178
1179 ieee80211_recalc_smps(sdata);
1180}
Johannes Berg1fa57d02010-06-10 10:21:32 +02001181
Johannes Berg75636522008-07-09 14:40:35 +02001182/*
1183 * Helper function to initialise an interface to a specific type.
1184 */
1185static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001186 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001187{
Johannes Berg75636522008-07-09 14:40:35 +02001188 /* clear type-dependent union */
1189 memset(&sdata->u, 0, sizeof(sdata->u));
1190
1191 /* and set some type-dependent values */
1192 sdata->vif.type = type;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001193 sdata->vif.p2p = false;
Johannes Berg60719ff2008-09-16 14:55:09 +02001194 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +02001195
Johannes Berga621fa42010-08-27 14:26:54 +03001196 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1197 sdata->control_port_no_encrypt = false;
1198
Simon Wunderlichb53be792011-11-18 14:20:44 +01001199 sdata->noack_map = 0;
1200
Johannes Bergf142c6b2012-06-18 20:07:15 +02001201 /* only monitor/p2p-device differ */
1202 if (sdata->dev) {
1203 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1204 sdata->dev->type = ARPHRD_ETHER;
1205 }
Johannes Berg75636522008-07-09 14:40:35 +02001206
Johannes Berg35f20c12010-06-10 10:21:30 +02001207 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001208 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg04ecd252012-09-11 14:34:12 +02001209 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
Johannes Berg35f20c12010-06-10 10:21:30 +02001210
Johannes Berg75636522008-07-09 14:40:35 +02001211 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001212 case NL80211_IFTYPE_P2P_GO:
1213 type = NL80211_IFTYPE_AP;
1214 sdata->vif.type = type;
1215 sdata->vif.p2p = true;
1216 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001217 case NL80211_IFTYPE_AP:
Marco Porschd012a602012-10-10 12:39:50 -07001218 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
Johannes Berg75636522008-07-09 14:40:35 +02001219 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1220 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001221 case NL80211_IFTYPE_P2P_CLIENT:
1222 type = NL80211_IFTYPE_STATION;
1223 sdata->vif.type = type;
1224 sdata->vif.p2p = true;
1225 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001226 case NL80211_IFTYPE_STATION:
Johannes Berg9c6bd792008-09-11 00:01:52 +02001227 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +02001228 break;
Johannes Berg46900292009-02-15 12:44:28 +01001229 case NL80211_IFTYPE_ADHOC:
1230 ieee80211_ibss_setup_sdata(sdata);
1231 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001232 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +02001233 if (ieee80211_vif_is_mesh(&sdata->vif))
1234 ieee80211_mesh_init_sdata(sdata);
1235 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001236 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +02001237 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +01001238 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +02001239 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1240 MONITOR_FLAG_OTHER_BSS;
1241 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001242 case NL80211_IFTYPE_WDS:
1243 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg98104fde2012-06-16 00:19:54 +02001244 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf142c6b2012-06-18 20:07:15 +02001245 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001246 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001247 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +02001248 BUG();
1249 break;
1250 }
1251
1252 ieee80211_debugfs_add_netdev(sdata);
1253}
1254
Johannes Berg34d4bc42010-08-27 12:35:58 +02001255static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1256 enum nl80211_iftype type)
1257{
1258 struct ieee80211_local *local = sdata->local;
1259 int ret, err;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001260 enum nl80211_iftype internal_type = type;
1261 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001262
1263 ASSERT_RTNL();
1264
1265 if (!local->ops->change_interface)
1266 return -EBUSY;
1267
1268 switch (sdata->vif.type) {
1269 case NL80211_IFTYPE_AP:
1270 case NL80211_IFTYPE_STATION:
1271 case NL80211_IFTYPE_ADHOC:
1272 /*
1273 * Could maybe also all others here?
1274 * Just not sure how that interacts
1275 * with the RX/config path e.g. for
1276 * mesh.
1277 */
1278 break;
1279 default:
1280 return -EBUSY;
1281 }
1282
1283 switch (type) {
1284 case NL80211_IFTYPE_AP:
1285 case NL80211_IFTYPE_STATION:
1286 case NL80211_IFTYPE_ADHOC:
1287 /*
1288 * Could probably support everything
1289 * but WDS here (WDS do_open can fail
1290 * under memory pressure, which this
1291 * code isn't prepared to handle).
1292 */
1293 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001294 case NL80211_IFTYPE_P2P_CLIENT:
1295 p2p = true;
1296 internal_type = NL80211_IFTYPE_STATION;
1297 break;
1298 case NL80211_IFTYPE_P2P_GO:
1299 p2p = true;
1300 internal_type = NL80211_IFTYPE_AP;
1301 break;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001302 default:
1303 return -EBUSY;
1304 }
1305
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001306 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001307 if (ret)
1308 return ret;
1309
1310 ieee80211_do_stop(sdata, false);
1311
Johannes Bergf142c6b2012-06-18 20:07:15 +02001312 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001313
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001314 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001315 if (ret)
1316 type = sdata->vif.type;
1317
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001318 /*
1319 * Ignore return value here, there's not much we can do since
1320 * the driver changed the interface type internally already.
1321 * The warnings will hopefully make driver authors fix it :-)
1322 */
1323 ieee80211_check_queues(sdata);
1324
Johannes Berg34d4bc42010-08-27 12:35:58 +02001325 ieee80211_setup_sdata(sdata, type);
1326
Johannes Bergf142c6b2012-06-18 20:07:15 +02001327 err = ieee80211_do_open(&sdata->wdev, false);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001328 WARN(err, "type change: do_open returned %d", err);
1329
1330 return ret;
1331}
1332
Johannes Bergf3947e22008-07-09 14:40:36 +02001333int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001334 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001335{
Johannes Berg34d4bc42010-08-27 12:35:58 +02001336 int ret;
1337
Johannes Bergf3947e22008-07-09 14:40:36 +02001338 ASSERT_RTNL();
1339
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001340 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +02001341 return 0;
1342
Johannes Berg34d4bc42010-08-27 12:35:58 +02001343 if (ieee80211_sdata_running(sdata)) {
1344 ret = ieee80211_runtime_change_iftype(sdata, type);
1345 if (ret)
1346 return ret;
1347 } else {
1348 /* Purge and reset type-dependent state. */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001349 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001350 ieee80211_setup_sdata(sdata, type);
1351 }
Johannes Berg75636522008-07-09 14:40:35 +02001352
1353 /* reset some values that shouldn't be kept across type changes */
Johannes Berg75636522008-07-09 14:40:35 +02001354 sdata->drop_unencrypted = 0;
Johannes Berg9bc383d2009-11-19 11:55:19 +01001355 if (type == NL80211_IFTYPE_STATION)
1356 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001357
1358 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001359}
1360
Johannes Bergfa9029f2010-02-25 15:13:11 +01001361static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001362 u8 *perm_addr, enum nl80211_iftype type)
Johannes Bergfa9029f2010-02-25 15:13:11 +01001363{
1364 struct ieee80211_sub_if_data *sdata;
1365 u64 mask, start, addr, val, inc;
1366 u8 *m;
1367 u8 tmp_addr[ETH_ALEN];
1368 int i;
1369
1370 /* default ... something at least */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001371 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001372
1373 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1374 local->hw.wiphy->n_addresses <= 1)
1375 return;
1376
Johannes Bergfa9029f2010-02-25 15:13:11 +01001377 mutex_lock(&local->iflist_mtx);
1378
1379 switch (type) {
1380 case NL80211_IFTYPE_MONITOR:
1381 /* doesn't matter */
1382 break;
1383 case NL80211_IFTYPE_WDS:
1384 case NL80211_IFTYPE_AP_VLAN:
1385 /* match up with an AP interface */
1386 list_for_each_entry(sdata, &local->interfaces, list) {
1387 if (sdata->vif.type != NL80211_IFTYPE_AP)
1388 continue;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001389 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001390 break;
1391 }
1392 /* keep default if no AP interface present */
1393 break;
Johannes Berg6d711172012-06-19 17:19:44 +02001394 case NL80211_IFTYPE_P2P_CLIENT:
1395 case NL80211_IFTYPE_P2P_GO:
1396 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1397 list_for_each_entry(sdata, &local->interfaces, list) {
1398 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1399 continue;
1400 if (!ieee80211_sdata_running(sdata))
1401 continue;
1402 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1403 goto out_unlock;
1404 }
1405 }
1406 /* otherwise fall through */
Johannes Bergfa9029f2010-02-25 15:13:11 +01001407 default:
1408 /* assign a new address if possible -- try n_addresses first */
1409 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1410 bool used = false;
1411
1412 list_for_each_entry(sdata, &local->interfaces, list) {
1413 if (memcmp(local->hw.wiphy->addresses[i].addr,
1414 sdata->vif.addr, ETH_ALEN) == 0) {
1415 used = true;
1416 break;
1417 }
1418 }
1419
1420 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001421 memcpy(perm_addr,
Johannes Bergfa9029f2010-02-25 15:13:11 +01001422 local->hw.wiphy->addresses[i].addr,
1423 ETH_ALEN);
1424 break;
1425 }
1426 }
1427
1428 /* try mask if available */
1429 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1430 break;
1431
1432 m = local->hw.wiphy->addr_mask;
1433 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1434 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1435 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1436
1437 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1438 /* not a contiguous mask ... not handled now! */
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001439 pr_info("not contiguous\n");
Johannes Bergfa9029f2010-02-25 15:13:11 +01001440 break;
1441 }
1442
1443 m = local->hw.wiphy->perm_addr;
1444 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1445 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1446 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1447
1448 inc = 1ULL<<__ffs64(mask);
1449 val = (start & mask);
1450 addr = (start & ~mask) | (val & mask);
1451 do {
1452 bool used = false;
1453
1454 tmp_addr[5] = addr >> 0*8;
1455 tmp_addr[4] = addr >> 1*8;
1456 tmp_addr[3] = addr >> 2*8;
1457 tmp_addr[2] = addr >> 3*8;
1458 tmp_addr[1] = addr >> 4*8;
1459 tmp_addr[0] = addr >> 5*8;
1460
1461 val += inc;
1462
1463 list_for_each_entry(sdata, &local->interfaces, list) {
1464 if (memcmp(tmp_addr, sdata->vif.addr,
1465 ETH_ALEN) == 0) {
1466 used = true;
1467 break;
1468 }
1469 }
1470
1471 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001472 memcpy(perm_addr, tmp_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001473 break;
1474 }
1475 addr = (start & ~mask) | (val & mask);
1476 } while (addr != start);
1477
1478 break;
1479 }
1480
Johannes Berg6d711172012-06-19 17:19:44 +02001481 out_unlock:
Johannes Bergfa9029f2010-02-25 15:13:11 +01001482 mutex_unlock(&local->iflist_mtx);
1483}
1484
Johannes Berg97f97b12012-12-13 22:54:58 +01001485static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1486{
1487 struct ieee80211_sub_if_data *sdata;
1488
1489 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1490
1491 ieee80211_cleanup_sdata_stas(sdata);
1492}
1493
Johannes Berg3e122be2008-07-09 14:40:34 +02001494int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg84efbb82012-06-16 00:00:26 +02001495 struct wireless_dev **new_wdev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001496 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -07001497{
Johannes Bergf142c6b2012-06-18 20:07:15 +02001498 struct net_device *ndev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001499 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +02001500 int ret, i;
Johannes Bergded81f62012-03-28 11:04:26 +02001501 int txqs = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001502
1503 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001504
Johannes Bergf142c6b2012-06-18 20:07:15 +02001505 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1506 struct wireless_dev *wdev;
Johannes Bergded81f62012-03-28 11:04:26 +02001507
Johannes Bergf142c6b2012-06-18 20:07:15 +02001508 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1509 GFP_KERNEL);
1510 if (!sdata)
1511 return -ENOMEM;
1512 wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001513
Johannes Bergf142c6b2012-06-18 20:07:15 +02001514 sdata->dev = NULL;
1515 strlcpy(sdata->name, name, IFNAMSIZ);
1516 ieee80211_assign_perm_addr(local, wdev->address, type);
1517 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1518 } else {
1519 if (local->hw.queues >= IEEE80211_NUM_ACS)
1520 txqs = IEEE80211_NUM_ACS;
Johannes Bergf3994ec2008-05-12 20:51:44 -07001521
Johannes Bergf142c6b2012-06-18 20:07:15 +02001522 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1523 local->hw.vif_data_size,
1524 name, ieee80211_if_setup, txqs, 1);
1525 if (!ndev)
1526 return -ENOMEM;
1527 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Thadeu Lima de Souza Cascardo59e7e702011-06-02 17:28:37 -03001528
Johannes Bergf142c6b2012-06-18 20:07:15 +02001529 ndev->needed_headroom = local->tx_headroom +
1530 4*6 /* four MAC addresses */
1531 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1532 + 6 /* mesh */
1533 + 8 /* rfc1042/bridge tunnel */
1534 - ETH_HLEN /* ethernet hard_header_len */
1535 + IEEE80211_ENCRYPT_HEADROOM;
1536 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
Jiri Bencf0706e82007-05-05 11:45:53 -07001537
Johannes Bergf142c6b2012-06-18 20:07:15 +02001538 ret = dev_alloc_name(ndev, ndev->name);
1539 if (ret < 0) {
1540 free_netdev(ndev);
1541 return ret;
1542 }
1543
1544 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1545 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1546 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1547
1548 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1549 sdata = netdev_priv(ndev);
1550 ndev->ieee80211_ptr = &sdata->wdev;
1551 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1552 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1553
1554 sdata->dev = ndev;
1555 }
Johannes Berg75636522008-07-09 14:40:35 +02001556
1557 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -07001558 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -07001559 sdata->local = local;
Juuso Oikarinen68542962010-06-09 13:43:26 +03001560#ifdef CONFIG_INET
1561 sdata->arp_filter_state = true;
1562#endif
Johannes Berg75636522008-07-09 14:40:35 +02001563
1564 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1565 skb_queue_head_init(&sdata->fragments[i].skb_list);
1566
1567 INIT_LIST_HEAD(&sdata->key_list);
1568
Johannes Berg97f97b12012-12-13 22:54:58 +01001569 spin_lock_init(&sdata->cleanup_stations_lock);
1570 INIT_LIST_HEAD(&sdata->cleanup_stations);
1571 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1572
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001573 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1574 struct ieee80211_supported_band *sband;
1575 sband = local->hw.wiphy->bands[i];
1576 sdata->rc_rateidx_mask[i] =
1577 sband ? (1 << sband->n_bitrates) - 1 : 0;
Simon Wunderlich19468412012-01-28 17:25:33 +01001578 if (sband)
1579 memcpy(sdata->rc_rateidx_mcs_mask[i],
1580 sband->ht_cap.mcs.rx_mask,
1581 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1582 else
1583 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1584 sizeof(sdata->rc_rateidx_mcs_mask[i]));
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001585 }
Johannes Berg75636522008-07-09 14:40:35 +02001586
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001587 ieee80211_set_default_queues(sdata);
1588
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001589 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1590 sdata->user_power_level = local->user_power_level;
1591
Johannes Berg75636522008-07-09 14:40:35 +02001592 /* setup type-dependent data */
1593 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001594
Johannes Bergf142c6b2012-06-18 20:07:15 +02001595 if (ndev) {
1596 if (params) {
1597 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1598 if (type == NL80211_IFTYPE_STATION)
1599 sdata->u.mgd.use_4addr = params->use_4addr;
1600 }
1601
1602 ndev->features |= local->hw.netdev_features;
1603
1604 ret = register_netdevice(ndev);
1605 if (ret) {
1606 free_netdev(ndev);
1607 return ret;
1608 }
Johannes Berg9bc383d2009-11-19 11:55:19 +01001609 }
1610
Johannes Bergc771c9d2009-01-23 22:54:03 +01001611 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001612 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001613 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001614
Johannes Berg84efbb82012-06-16 00:00:26 +02001615 if (new_wdev)
1616 *new_wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001617
Jiri Bencf0706e82007-05-05 11:45:53 -07001618 return 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001619}
1620
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001621void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001622{
Jiri Bencf0706e82007-05-05 11:45:53 -07001623 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001624
Johannes Bergc771c9d2009-01-23 22:54:03 +01001625 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001626 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001627 mutex_unlock(&sdata->local->iflist_mtx);
1628
Johannes Berg75636522008-07-09 14:40:35 +02001629 synchronize_rcu();
Johannes Bergf142c6b2012-06-18 20:07:15 +02001630
1631 if (sdata->dev) {
1632 unregister_netdevice(sdata->dev);
1633 } else {
1634 cfg80211_unregister_wdev(&sdata->wdev);
1635 kfree(sdata);
1636 }
1637}
1638
1639void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1640{
1641 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1642 return;
1643 ieee80211_do_stop(sdata, true);
1644 ieee80211_teardown_sdata(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001645}
1646
Johannes Berg75636522008-07-09 14:40:35 +02001647/*
1648 * Remove all interfaces, may only be called at hardware unregistration
1649 * time because it doesn't do RCU-safe list removals.
1650 */
1651void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07001652{
Johannes Berg75636522008-07-09 14:40:35 +02001653 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001654 LIST_HEAD(unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001655 LIST_HEAD(wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001656
1657 ASSERT_RTNL();
1658
Eric Dumazetefe117a2009-11-05 11:06:40 +01001659 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001660 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1661 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001662
Johannes Bergf142c6b2012-06-18 20:07:15 +02001663 if (sdata->dev)
1664 unregister_netdevice_queue(sdata->dev, &unreg_list);
1665 else
1666 list_add(&sdata->list, &wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001667 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001668 mutex_unlock(&local->iflist_mtx);
1669 unregister_netdevice_many(&unreg_list);
Eric W. Biederman5f04d502011-02-20 11:49:45 -08001670 list_del(&unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001671
1672 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1673 list_del(&sdata->list);
1674 cfg80211_unregister_wdev(&sdata->wdev);
1675 kfree(sdata);
1676 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001677}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001678
Johannes Berg47846c92009-11-25 17:46:19 +01001679static int netdev_notify(struct notifier_block *nb,
1680 unsigned long state,
1681 void *ndev)
1682{
1683 struct net_device *dev = ndev;
1684 struct ieee80211_sub_if_data *sdata;
1685
1686 if (state != NETDEV_CHANGENAME)
1687 return 0;
1688
1689 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1690 return 0;
1691
1692 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1693 return 0;
1694
1695 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1696
Johannes Berg2f5265e2010-02-12 10:45:05 +01001697 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001698
1699 ieee80211_debugfs_rename_netdev(sdata);
1700 return 0;
1701}
1702
1703static struct notifier_block mac80211_netdev_notifier = {
1704 .notifier_call = netdev_notify,
1705};
1706
1707int ieee80211_iface_init(void)
1708{
1709 return register_netdevice_notifier(&mac80211_netdev_notifier);
1710}
1711
1712void ieee80211_iface_exit(void)
1713{
1714 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1715}