blob: 3bfe2612c8c2e64f19a0843875b470eb72c7325b [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 Bergfd0f9792013-02-07 00:14:51 +010081static u32 ieee80211_idle_off(struct ieee80211_local *local)
Johannes Bergcc45ae542012-06-21 22:30:52 +020082{
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
84 return 0;
85
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
88}
89
90static u32 ieee80211_idle_on(struct ieee80211_local *local)
91{
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
93 return 0;
94
95 drv_flush(local, false);
96
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
99}
100
Johannes Bergfd0f9792013-02-07 00:14:51 +0100101void ieee80211_recalc_idle(struct ieee80211_local *local)
Johannes Bergcc45ae542012-06-21 22:30:52 +0200102{
Johannes Bergfd0f9792013-02-07 00:14:51 +0100103 bool working = false, scanning, active;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200104 unsigned int led_trig_start = 0, led_trig_stop = 0;
105 struct ieee80211_roc_work *roc;
Johannes Bergfd0f9792013-02-07 00:14:51 +0100106 u32 change;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200107
Johannes Bergcc45ae542012-06-21 22:30:52 +0200108 lockdep_assert_held(&local->mtx);
109
Felix Fietkaub759f4d2013-02-23 18:40:57 +0100110 active = !list_empty(&local->chanctx_list) || local->monitors;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200111
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
114 working = true;
Johannes Bergfd0f9792013-02-07 00:14:51 +0100115 break;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200116 }
117 }
118
Johannes Bergf1e3e052013-02-06 23:57:57 +0100119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
Johannes Bergcc45ae542012-06-21 22:30:52 +0200121
Johannes Bergcc45ae542012-06-21 22:30:52 +0200122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
Johannes Bergfd0f9792013-02-07 00:14:51 +0100127 if (active)
Johannes Bergcc45ae542012-06-21 22:30:52 +0200128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129 else
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
133
Johannes Bergfd0f9792013-02-07 00:14:51 +0100134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
Johannes Bergcc45ae542012-06-21 22:30:52 +0200136 else
Johannes Bergfd0f9792013-02-07 00:14:51 +0100137 change = ieee80211_idle_on(local);
138 if (change)
139 ieee80211_hw_config(local, change);
Johannes Bergcc45ae542012-06-21 22:30:52 +0200140}
141
Johannes Berg0d143fe2008-09-11 00:01:59 +0200142static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
143{
Chaitanya09b14262012-12-21 17:15:17 +0530144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200145 return -EINVAL;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200146
Johannes Berg0d143fe2008-09-11 00:01:59 +0200147 dev->mtu = new_mtu;
148 return 0;
149}
150
Helmut Schaa478622e2012-11-27 18:23:06 +0100151static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
152{
153 struct ieee80211_sub_if_data *sdata;
154 u64 new, mask, tmp;
155 u8 *m;
156 int ret = 0;
157
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
159 return 0;
160
161 m = addr;
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
165
166 m = local->hw.wiphy->addr_mask;
167 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
175 continue;
176
177 m = sdata->vif.addr;
178 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
182 if ((new & ~mask) != (tmp & ~mask)) {
183 ret = -EINVAL;
184 break;
185 }
186 }
187 mutex_unlock(&local->iflist_mtx);
188
189 return ret;
190}
191
Johannes Berg47846c92009-11-25 17:46:19 +0100192static int ieee80211_change_mac(struct net_device *dev, void *addr)
193{
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Kalle Valofc5f7572009-12-30 15:54:03 +0200195 struct sockaddr *sa = addr;
Johannes Berg47846c92009-11-25 17:46:19 +0100196 int ret;
197
Johannes Berg9607e6b2009-12-23 13:15:31 +0100198 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100199 return -EBUSY;
200
Helmut Schaa478622e2012-11-27 18:23:06 +0100201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
202 if (ret)
203 return ret;
204
Kalle Valofc5f7572009-12-30 15:54:03 +0200205 ret = eth_mac_addr(dev, sa);
Johannes Berg47846c92009-11-25 17:46:19 +0100206
207 if (ret == 0)
Kalle Valofc5f7572009-12-30 15:54:03 +0200208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100209
210 return ret;
211}
212
Johannes Berg0d143fe2008-09-11 00:01:59 +0200213static inline int identical_mac_addr_allowed(int type1, int type2)
214{
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
Johannes Bergf142c6b2012-06-18 20:07:15 +0200217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
Johannes Berg0d143fe2008-09-11 00:01:59 +0200219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
227}
228
Johannes Berg87490f62010-08-27 12:35:57 +0200229static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200231{
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200232 struct ieee80211_local *local = sdata->local;
Johannes Berg87490f62010-08-27 12:35:57 +0200233 struct ieee80211_sub_if_data *nsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200234
Johannes Berg87490f62010-08-27 12:35:57 +0200235 ASSERT_RTNL();
Johannes Berg0d143fe2008-09-11 00:01:59 +0200236
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
Johannes Berg371a2552012-06-19 15:54:05 +0200239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200240 /*
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
244 *
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
249 */
Johannes Berg87490f62010-08-27 12:35:57 +0200250 if (iftype == NL80211_IFTYPE_ADHOC &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
252 return -EBUSY;
253
254 /*
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
257 */
Johannes Berg371a2552012-06-19 15:54:05 +0200258 if (!ether_addr_equal(sdata->vif.addr,
259 nsdata->vif.addr))
Johannes Berg0d143fe2008-09-11 00:01:59 +0200260 continue;
261
262 /*
263 * check whether it may have the same address
264 */
Johannes Berg87490f62010-08-27 12:35:57 +0200265 if (!identical_mac_addr_allowed(iftype,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200266 nsdata->vif.type))
267 return -ENOTUNIQ;
268
269 /*
270 * can only add VLANs to enabled APs
271 */
Johannes Berg87490f62010-08-27 12:35:57 +0200272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
275 }
276 }
277
Johannes Berg87490f62010-08-27 12:35:57 +0200278 return 0;
279}
280
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200281static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
282{
283 int n_queues = sdata->local->hw.queues;
284 int i;
285
Ilan Peer0ef24e52012-08-21 12:43:35 +0300286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
290 return -EINVAL;
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
292 n_queues))
293 return -EINVAL;
294 }
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200295 }
296
Bob Copeland8ffb5c02013-02-15 10:18:34 -0500297 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
298 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
Luciano Coelhobb3e10f2012-04-12 16:09:49 +0300299 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200300 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
301 return 0;
302 }
303
304 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
305 return -EINVAL;
306
307 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
308 return -EINVAL;
309
310 return 0;
311}
312
Christian Lamparter85416a42010-10-02 13:17:07 +0200313void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
314 const int offset)
315{
316 struct ieee80211_local *local = sdata->local;
317 u32 flags = sdata->u.mntr_flags;
318
319#define ADJUST(_f, _s) do { \
320 if (flags & MONITOR_FLAG_##_f) \
321 local->fif_##_s += offset; \
322 } while (0)
323
324 ADJUST(FCSFAIL, fcsfail);
325 ADJUST(PLCPFAIL, plcpfail);
326 ADJUST(CONTROL, control);
327 ADJUST(CONTROL, pspoll);
328 ADJUST(OTHER_BSS, other_bss);
329
330#undef ADJUST
331}
332
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200333static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
334{
335 struct ieee80211_local *local = sdata->local;
336 int i;
337
338 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
339 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
340 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
Johannes Berga9d3c052012-05-07 17:45:29 +0200341 else if (local->hw.queues >= IEEE80211_NUM_ACS)
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200342 sdata->vif.hw_queue[i] = i;
Johannes Berga9d3c052012-05-07 17:45:29 +0200343 else
344 sdata->vif.hw_queue[i] = 0;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200345 }
346 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347}
348
Johannes Berg075e0842012-07-12 19:28:31 +0200349static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200350{
351 struct ieee80211_sub_if_data *sdata;
Johannes Berg8b305782013-03-20 22:25:17 +0100352 int ret;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200353
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
355 return 0;
356
Johannes Berg8b305782013-03-20 22:25:17 +0100357 ASSERT_RTNL();
Johannes Berg685fb722012-07-11 16:38:09 +0200358
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200359 if (local->monitor_sdata)
Johannes Berg8b305782013-03-20 22:25:17 +0100360 return 0;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200361
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
Johannes Berg8b305782013-03-20 22:25:17 +0100363 if (!sdata)
364 return -ENOMEM;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200365
366 /* set up data */
367 sdata->local = local;
368 sdata->vif.type = NL80211_IFTYPE_MONITOR;
369 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
370 wiphy_name(local->hw.wiphy));
371
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200372 ieee80211_set_default_queues(sdata);
373
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200374 ret = drv_add_interface(local, sdata);
375 if (WARN_ON(ret)) {
376 /* ok .. stupid driver, it asked for this! */
377 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100378 return ret;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200379 }
380
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200381 ret = ieee80211_check_queues(sdata);
382 if (ret) {
383 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100384 return ret;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200385 }
386
Johannes Berg4bf88532012-11-09 11:39:59 +0100387 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
Johannes Berg55de9082012-07-26 17:24:39 +0200388 IEEE80211_CHANCTX_EXCLUSIVE);
389 if (ret) {
390 drv_remove_interface(local, sdata);
391 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100392 return ret;
Johannes Berg55de9082012-07-26 17:24:39 +0200393 }
394
Johannes Berg8b305782013-03-20 22:25:17 +0100395 mutex_lock(&local->iflist_mtx);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200396 rcu_assign_pointer(local->monitor_sdata, sdata);
Johannes Berg685fb722012-07-11 16:38:09 +0200397 mutex_unlock(&local->iflist_mtx);
Johannes Berg8b305782013-03-20 22:25:17 +0100398
399 return 0;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200400}
401
Johannes Berg075e0842012-07-12 19:28:31 +0200402static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200403{
404 struct ieee80211_sub_if_data *sdata;
405
406 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
407 return;
408
Johannes Berg8b305782013-03-20 22:25:17 +0100409 ASSERT_RTNL();
410
Johannes Berg685fb722012-07-11 16:38:09 +0200411 mutex_lock(&local->iflist_mtx);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200412
Johannes Berg685fb722012-07-11 16:38:09 +0200413 sdata = rcu_dereference_protected(local->monitor_sdata,
414 lockdep_is_held(&local->iflist_mtx));
Johannes Berg8b305782013-03-20 22:25:17 +0100415 if (!sdata) {
416 mutex_unlock(&local->iflist_mtx);
417 return;
418 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200419
420 rcu_assign_pointer(local->monitor_sdata, NULL);
Johannes Berg8b305782013-03-20 22:25:17 +0100421 mutex_unlock(&local->iflist_mtx);
422
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200423 synchronize_net();
424
Johannes Berg55de9082012-07-26 17:24:39 +0200425 ieee80211_vif_release_channel(sdata);
426
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200427 drv_remove_interface(local, sdata);
428
429 kfree(sdata);
430}
431
Johannes Berg34d4bc42010-08-27 12:35:58 +0200432/*
433 * NOTE: Be very careful when changing this function, it must NOT return
434 * an error on interface type changes that have been pre-checked, so most
435 * checks should be in ieee80211_check_concurrent_iface.
436 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200437int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
Johannes Berg87490f62010-08-27 12:35:57 +0200438{
Johannes Bergf142c6b2012-06-18 20:07:15 +0200439 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
440 struct net_device *dev = wdev->netdev;
Johannes Berg87490f62010-08-27 12:35:57 +0200441 struct ieee80211_local *local = sdata->local;
442 struct sta_info *sta;
443 u32 changed = 0;
444 int res;
445 u32 hw_reconf_flags = 0;
446
Johannes Berg0d143fe2008-09-11 00:01:59 +0200447 switch (sdata->vif.type) {
448 case NL80211_IFTYPE_WDS:
449 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
450 return -ENOLINK;
451 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100452 case NL80211_IFTYPE_AP_VLAN: {
453 struct ieee80211_sub_if_data *master;
454
Johannes Berg0d143fe2008-09-11 00:01:59 +0200455 if (!sdata->bss)
456 return -ENOLINK;
Johannes Berg665c93a2011-11-04 11:18:11 +0100457
Johannes Berg0d143fe2008-09-11 00:01:59 +0200458 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
Johannes Berg665c93a2011-11-04 11:18:11 +0100459
460 master = container_of(sdata->bss,
461 struct ieee80211_sub_if_data, u.ap);
462 sdata->control_port_protocol =
463 master->control_port_protocol;
464 sdata->control_port_no_encrypt =
465 master->control_port_no_encrypt;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200466 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100467 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200468 case NL80211_IFTYPE_AP:
469 sdata->bss = &sdata->u.ap;
470 break;
471 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200472 case NL80211_IFTYPE_STATION:
473 case NL80211_IFTYPE_MONITOR:
474 case NL80211_IFTYPE_ADHOC:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200475 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200476 /* no special treatment */
477 break;
478 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200479 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200480 case NL80211_IFTYPE_P2P_CLIENT:
481 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200482 /* cannot happen */
483 WARN_ON(1);
484 break;
485 }
486
487 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200488 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200489 if (res)
490 goto err_del_bss;
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400491 if (local->ops->napi_poll)
492 napi_enable(&local->napi);
Johannes Berge8975582008-10-09 12:18:51 +0200493 /* we're brought up, everything changes */
494 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200495 ieee80211_led_radio(local, true);
Johannes Berg67408c82010-11-30 08:59:23 +0100496 ieee80211_mod_tpt_led_trig(local,
497 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200498 }
499
500 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200501 * Copy the hopefully now-present MAC address to
502 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200503 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200504 if (dev && is_zero_ether_addr(dev->dev_addr)) {
Johannes Bergbf533e02010-08-27 12:35:56 +0200505 memcpy(dev->dev_addr,
506 local->hw.wiphy->perm_addr,
507 ETH_ALEN);
508 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200509
Johannes Bergbf533e02010-08-27 12:35:56 +0200510 if (!is_valid_ether_addr(dev->dev_addr)) {
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200511 res = -EADDRNOTAVAIL;
512 goto err_stop;
John W. Linville0adc23f2009-10-06 16:27:18 -0400513 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200514 }
515
Johannes Berg0d143fe2008-09-11 00:01:59 +0200516 switch (sdata->vif.type) {
517 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg4d76d212012-12-11 20:38:41 +0100518 /* no need to tell driver, but set carrier and chanctx */
519 if (rtnl_dereference(sdata->bss->beacon)) {
520 ieee80211_vif_vlan_copy_chanctx(sdata);
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200521 netif_carrier_on(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100522 } else {
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200523 netif_carrier_off(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100524 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200525 break;
526 case NL80211_IFTYPE_MONITOR:
527 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
528 local->cooked_mntrs++;
529 break;
530 }
531
Johannes Berg075e0842012-07-12 19:28:31 +0200532 if (local->monitors == 0 && local->open_count == 0) {
533 res = ieee80211_add_virtual_monitor(local);
534 if (res)
535 goto err_stop;
536 }
537
Johannes Berg0d143fe2008-09-11 00:01:59 +0200538 /* must be before the call to ieee80211_configure_filter */
539 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200540 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100541 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
542 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200543 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200544
Christian Lamparter85416a42010-10-02 13:17:07 +0200545 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200546 ieee80211_configure_filter(local);
Felix Fietkau801d9292013-03-02 19:05:47 +0100547 mutex_lock(&local->mtx);
548 ieee80211_recalc_idle(local);
549 mutex_unlock(&local->mtx);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200550
551 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200552 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200553 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200554 if (coming_up) {
Johannes Berg075e0842012-07-12 19:28:31 +0200555 ieee80211_del_virtual_monitor(local);
556
Johannes Berg7b7eab62011-11-03 14:41:13 +0100557 res = drv_add_interface(local, sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200558 if (res)
559 goto err_stop;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200560 res = ieee80211_check_queues(sdata);
561 if (res)
562 goto err_del_interface;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200563 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200564
Alexander Bondarb207cdb2012-12-22 10:43:33 +0200565 drv_add_interface_debugfs(local, sdata);
566
Johannes Berg29cbe682010-12-03 09:20:44 +0100567 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400568 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200569 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400570
Igor Perminove3b90ca2009-08-04 16:48:51 +0400571 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200572 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
573 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700574 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400575
Johannes Bergf142c6b2012-06-18 20:07:15 +0200576 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
577 changed |= ieee80211_reset_erp_info(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200578 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200579
Johannes Bergc405c622012-07-30 19:44:12 +0200580 switch (sdata->vif.type) {
581 case NL80211_IFTYPE_STATION:
582 case NL80211_IFTYPE_ADHOC:
583 case NL80211_IFTYPE_AP:
584 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200585 netif_carrier_off(dev);
Johannes Bergc405c622012-07-30 19:44:12 +0200586 break;
Johannes Berg1411af12012-07-30 19:48:09 +0200587 case NL80211_IFTYPE_WDS:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200588 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berg1411af12012-07-30 19:48:09 +0200589 break;
Johannes Bergc405c622012-07-30 19:44:12 +0200590 default:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200591 netif_carrier_on(dev);
Johannes Bergc405c622012-07-30 19:44:12 +0200592 }
Eliad Peller59034592011-10-16 10:57:31 +0200593
594 /*
595 * set default queue parameters so drivers don't
596 * need to initialise the hardware if the hardware
597 * doesn't start up with sane defaults
598 */
Johannes Berg3abead52012-03-02 15:56:59 +0100599 ieee80211_set_wmm_default(sdata, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200600 }
601
Johannes Berg2d2080c2010-09-15 15:13:13 +0200602 set_bit(SDATA_STATE_RUNNING, &sdata->state);
603
Johannes Berg0d143fe2008-09-11 00:01:59 +0200604 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
605 /* Create STA entry for the WDS peer */
606 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
607 GFP_KERNEL);
608 if (!sta) {
609 res = -ENOMEM;
610 goto err_del_interface;
611 }
612
Johannes Berg83d5cc02012-01-12 09:31:10 +0100613 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
614 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
615 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200616
617 res = sta_info_insert(sta);
618 if (res) {
619 /* STA has been freed */
620 goto err_del_interface;
621 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400622
623 rate_control_rate_init(sta);
Johannes Berg1411af12012-07-30 19:48:09 +0200624 netif_carrier_on(dev);
Johannes Bergf142c6b2012-06-18 20:07:15 +0200625 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
626 rcu_assign_pointer(local->p2p_sdata, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200627 }
628
Johannes Berg0d143fe2008-09-11 00:01:59 +0200629 /*
630 * set_multicast_list will be invoked by the networking core
631 * which will check whether any increments here were done in
632 * error and sync them down to the hardware as filter flags.
633 */
634 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
635 atomic_inc(&local->iff_allmultis);
636
637 if (sdata->flags & IEEE80211_SDATA_PROMISC)
638 atomic_inc(&local->iff_promiscs);
639
Johannes Berg34d4bc42010-08-27 12:35:58 +0200640 if (coming_up)
641 local->open_count++;
642
Eliad Peller59034592011-10-16 10:57:31 +0200643 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200644 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200645
Johannes Berg10f644a2009-04-16 13:17:25 +0200646 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200647
Johannes Bergf142c6b2012-06-18 20:07:15 +0200648 if (dev)
649 netif_tx_start_all_queues(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200650
651 return 0;
652 err_del_interface:
Johannes Berg7b7eab62011-11-03 14:41:13 +0100653 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200654 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200655 if (!local->open_count)
656 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200657 err_del_bss:
658 sdata->bss = NULL;
659 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
660 list_del(&sdata->u.vlan.list);
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200661 /* might already be clear but that doesn't matter */
Johannes Berg2d2080c2010-09-15 15:13:13 +0200662 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200663 return res;
664}
665
Johannes Berg34d4bc42010-08-27 12:35:58 +0200666static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200667{
668 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200669 int err;
670
671 /* fail early if user set an invalid address */
Mohammed Shafi Shajakhan2fcf28242011-07-12 15:19:04 +0530672 if (!is_valid_ether_addr(dev->dev_addr))
Johannes Berg34d4bc42010-08-27 12:35:58 +0200673 return -EADDRNOTAVAIL;
674
675 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
676 if (err)
677 return err;
678
Johannes Bergf142c6b2012-06-18 20:07:15 +0200679 return ieee80211_do_open(&sdata->wdev, true);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200680}
681
682static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
683 bool going_down)
684{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200685 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200686 unsigned long flags;
687 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200688 u32 hw_reconf_flags = 0;
Johannes Berg09f41142012-12-13 23:26:57 +0100689 int i, flushed;
Michael Braun397a7a22013-02-13 16:49:15 +0100690 struct ps_data *ps;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200691
Rajkumar Manoharanc29acf22011-05-14 09:43:28 +0530692 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
693
Johannes Berge2fd5db2012-07-06 21:39:28 +0200694 if (rcu_access_pointer(local->scan_sdata) == sdata)
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700695 ieee80211_scan_cancel(local);
696
Johannes Berg0d143fe2008-09-11 00:01:59 +0200697 /*
698 * Stop TX on this interface first.
699 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200700 if (sdata->dev)
701 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200702
Johannes Berg2eb278e2012-06-05 14:28:42 +0200703 ieee80211_roc_purge(sdata);
Johannes Bergaf6b6372009-12-23 13:15:35 +0100704
Johannes Berg572078b2013-02-15 11:47:50 +0100705 if (sdata->vif.type == NL80211_IFTYPE_STATION)
706 ieee80211_mgd_stop(sdata);
707
Johannes Bergaf6b6372009-12-23 13:15:35 +0100708 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200709 * Remove all stations associated with this interface.
710 *
711 * This must be done before calling ops->remove_interface()
712 * because otherwise we can later invoke ops->sta_notify()
713 * whenever the STAs are removed, and that invalidates driver
714 * assumptions about always getting a vif pointer that is valid
715 * (because if we remove a STA after ops->remove_interface()
716 * the driver will have removed the vif info already!)
717 *
Johannes Berg09f41142012-12-13 23:26:57 +0100718 * This is relevant only in WDS mode, in all other modes we've
719 * already removed all stations when disconnecting or similar,
720 * so warn otherwise.
Johannes Berg051007d2012-12-13 23:49:02 +0100721 *
722 * We call sta_info_flush_cleanup() later, to combine RCU waits.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200723 */
Johannes Berg051007d2012-12-13 23:49:02 +0100724 flushed = sta_info_flush_defer(sdata);
Johannes Berg09f41142012-12-13 23:26:57 +0100725 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
726 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
Johannes Berg0d143fe2008-09-11 00:01:59 +0200727
728 /*
729 * Don't count this interface for promisc/allmulti while it
730 * is down. dev_mc_unsync() will invoke set_multicast_list
731 * on the master interface which will sync these down to the
732 * hardware as filter flags.
733 */
734 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
735 atomic_dec(&local->iff_allmultis);
736
737 if (sdata->flags & IEEE80211_SDATA_PROMISC)
738 atomic_dec(&local->iff_promiscs);
739
Johannes Berg7be50862010-10-13 12:06:24 +0200740 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400741 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200742 local->fif_probe_req--;
743 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
744 local->fif_probe_req--;
745 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400746
Johannes Bergf142c6b2012-06-18 20:07:15 +0200747 if (sdata->dev) {
748 netif_addr_lock_bh(sdata->dev);
749 spin_lock_bh(&local->filter_lock);
750 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
751 sdata->dev->addr_len);
752 spin_unlock_bh(&local->filter_lock);
753 netif_addr_unlock_bh(sdata->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200754
Johannes Bergf142c6b2012-06-18 20:07:15 +0200755 ieee80211_configure_filter(local);
756 }
Johannes Berg3ac64be2009-08-17 16:16:53 +0200757
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800758 del_timer_sync(&local->dynamic_ps_timer);
759 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200760
Johannes Berg04ecd252012-09-11 14:34:12 +0200761 cancel_work_sync(&sdata->recalc_smps);
762
Simon Wunderlich164eb022013-02-08 18:16:20 +0100763 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
764
765 if (sdata->wdev.cac_started) {
766 mutex_lock(&local->iflist_mtx);
767 ieee80211_vif_release_channel(sdata);
768 mutex_unlock(&local->iflist_mtx);
769 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
770 GFP_KERNEL);
771 }
772
Johannes Berg0d143fe2008-09-11 00:01:59 +0200773 /* APs need special treatment */
774 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200775 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200776
777 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200778 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200779 u.vlan.list)
780 dev_close(vlan->dev);
781 WARN_ON(!list_empty(&sdata->u.ap.vlans));
Michael Braun397a7a22013-02-13 16:49:15 +0100782 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
783 /* remove all packets in parent bc_buf pointing to this dev */
784 ps = &sdata->bss->ps;
785
786 spin_lock_irqsave(&ps->bc_buf.lock, flags);
787 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
788 if (skb->dev == sdata->dev) {
789 __skb_unlink(skb, &ps->bc_buf);
790 local->total_ps_buffered--;
791 ieee80211_free_txskb(&local->hw, skb);
792 }
793 }
794 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200795 }
796
Johannes Berg34d4bc42010-08-27 12:35:58 +0200797 if (going_down)
798 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200799
800 switch (sdata->vif.type) {
801 case NL80211_IFTYPE_AP_VLAN:
802 list_del(&sdata->u.vlan.list);
Johannes Berg4d76d212012-12-11 20:38:41 +0100803 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200804 /* no need to tell driver */
805 break;
806 case NL80211_IFTYPE_MONITOR:
807 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
808 local->cooked_mntrs--;
809 break;
810 }
811
812 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200813 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100814 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
815 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berg075e0842012-07-12 19:28:31 +0200816 ieee80211_del_virtual_monitor(local);
Johannes Berge8975582008-10-09 12:18:51 +0200817 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200818
Christian Lamparter85416a42010-10-02 13:17:07 +0200819 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200820 ieee80211_configure_filter(local);
Felix Fietkau801d9292013-03-02 19:05:47 +0100821 mutex_lock(&local->mtx);
822 ieee80211_recalc_idle(local);
823 mutex_unlock(&local->mtx);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200824 break;
Johannes Bergf142c6b2012-06-18 20:07:15 +0200825 case NL80211_IFTYPE_P2P_DEVICE:
826 /* relies on synchronize_rcu() below */
827 rcu_assign_pointer(local->p2p_sdata, NULL);
828 /* fall through */
Johannes Berg0d143fe2008-09-11 00:01:59 +0200829 default:
Johannes Berg0b7dff42012-12-05 09:49:14 +0100830 cancel_work_sync(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200831 /*
832 * When we get here, the interface is marked down.
Johannes Berg75de9112012-12-14 14:56:03 +0100833 *
834 * sta_info_flush_cleanup() requires rcu_barrier()
835 * first to wait for the station call_rcu() calls
836 * to complete, here we need at least sychronize_rcu()
837 * it to wait for the RX path in case it is using the
838 * interface and enqueuing frames at this very time on
839 * another CPU.
Johannes Berg35f20c12010-06-10 10:21:30 +0200840 */
Johannes Berg75de9112012-12-14 14:56:03 +0100841 rcu_barrier();
Johannes Berg051007d2012-12-13 23:49:02 +0100842 sta_info_flush_cleanup(sdata);
843
Johannes Berg35f20c12010-06-10 10:21:30 +0200844 skb_queue_purge(&sdata->skb_queue);
845
Bob Copeland97af7432009-07-29 10:13:03 +0200846 /*
Johannes Bergb9dcf712010-08-27 12:35:54 +0200847 * Free all remaining keys, there shouldn't be any,
848 * except maybe group keys in AP more or WDS?
849 */
Johannes Bergad0e2b52010-06-01 10:19:19 +0200850 ieee80211_free_keys(sdata);
Johannes Bergb9dcf712010-08-27 12:35:54 +0200851
Alexander Bondarb207cdb2012-12-22 10:43:33 +0200852 drv_remove_interface_debugfs(local, sdata);
853
Johannes Berg34d4bc42010-08-27 12:35:58 +0200854 if (going_down)
Johannes Berg7b7eab62011-11-03 14:41:13 +0100855 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200856 }
857
858 sdata->bss = NULL;
859
Johannes Berg5cff20e2009-04-29 12:26:17 +0200860 ieee80211_recalc_ps(local, -1);
861
Johannes Berg0d143fe2008-09-11 00:01:59 +0200862 if (local->open_count == 0) {
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400863 if (local->ops->napi_poll)
864 napi_disable(&local->napi);
Johannes Bergea77f122009-08-21 14:44:45 +0200865 ieee80211_clear_tx_pending(local);
Johannes Berg84f6a012009-08-20 20:02:20 +0200866 ieee80211_stop_device(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200867
Johannes Berge8975582008-10-09 12:18:51 +0200868 /* no reconfiguring after stop! */
869 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200870 }
871
Johannes Berge8975582008-10-09 12:18:51 +0200872 /* do after stop to avoid reconfiguring when we stop anyway */
Johannes Berg55de9082012-07-26 17:24:39 +0200873 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200874 ieee80211_hw_config(local, hw_reconf_flags);
875
Johannes Berg5061b0c2009-07-14 00:33:34 +0200876 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
877 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
878 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
879 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
880 if (info->control.vif == &sdata->vif) {
881 __skb_unlink(skb, &local->pending[i]);
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200882 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200883 }
884 }
885 }
886 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg075e0842012-07-12 19:28:31 +0200887
888 if (local->monitors == local->open_count && local->monitors > 0)
889 ieee80211_add_virtual_monitor(local);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200890}
891
892static int ieee80211_stop(struct net_device *dev)
893{
894 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
895
896 ieee80211_do_stop(sdata, true);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200897
Johannes Berg0d143fe2008-09-11 00:01:59 +0200898 return 0;
899}
900
901static void ieee80211_set_multicast_list(struct net_device *dev)
902{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200903 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200904 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200905 int allmulti, promisc, sdata_allmulti, sdata_promisc;
906
907 allmulti = !!(dev->flags & IFF_ALLMULTI);
908 promisc = !!(dev->flags & IFF_PROMISC);
909 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
910 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
911
912 if (allmulti != sdata_allmulti) {
913 if (dev->flags & IFF_ALLMULTI)
914 atomic_inc(&local->iff_allmultis);
915 else
916 atomic_dec(&local->iff_allmultis);
917 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
918 }
919
920 if (promisc != sdata_promisc) {
921 if (dev->flags & IFF_PROMISC)
922 atomic_inc(&local->iff_promiscs);
923 else
924 atomic_dec(&local->iff_promiscs);
925 sdata->flags ^= IEEE80211_SDATA_PROMISC;
926 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200927 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000928 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200929 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +0200930 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200931}
932
Johannes Berg75636522008-07-09 14:40:35 +0200933/*
934 * Called when the netdev is removed or, by the code below, before
935 * the interface type changes.
936 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200937static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -0700938{
Johannes Berg75636522008-07-09 14:40:35 +0200939 int flushed;
Jiri Bencf0706e82007-05-05 11:45:53 -0700940 int i;
941
Johannes Berg75636522008-07-09 14:40:35 +0200942 /* free extra data */
943 ieee80211_free_keys(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700944
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200945 ieee80211_debugfs_remove_netdev(sdata);
946
Johannes Berg988c0f72008-04-17 19:21:22 +0200947 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -0700948 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200949 sdata->fragment_next = 0;
950
Johannes Bergb9dcf712010-08-27 12:35:54 +0200951 if (ieee80211_vif_is_mesh(&sdata->vif))
952 mesh_rmc_free(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200953
Johannes Bergb998e8b2012-12-13 23:07:46 +0100954 flushed = sta_info_flush(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200955 WARN_ON(flushed);
Jiri Bencf0706e82007-05-05 11:45:53 -0700956}
957
Johannes Bergf142c6b2012-06-18 20:07:15 +0200958static void ieee80211_uninit(struct net_device *dev)
959{
960 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
961}
962
Johannes Bergcf0277e2010-01-05 18:00:58 +0100963static u16 ieee80211_netdev_select_queue(struct net_device *dev,
964 struct sk_buff *skb)
965{
966 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
967}
968
Johannes Berg587e7292009-01-30 13:35:22 +0100969static const struct net_device_ops ieee80211_dataif_ops = {
970 .ndo_open = ieee80211_open,
971 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +0200972 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +0100973 .ndo_start_xmit = ieee80211_subif_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000974 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +0100975 .ndo_change_mtu = ieee80211_change_mtu,
Johannes Berg47846c92009-11-25 17:46:19 +0100976 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100977 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100978};
979
Johannes Bergcf0277e2010-01-05 18:00:58 +0100980static u16 ieee80211_monitor_select_queue(struct net_device *dev,
981 struct sk_buff *skb)
982{
983 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_hdr *hdr;
986 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
987
Johannes Berg32c50572012-03-28 11:04:29 +0200988 if (local->hw.queues < IEEE80211_NUM_ACS)
Johannes Bergcf0277e2010-01-05 18:00:58 +0100989 return 0;
990
991 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +0100992 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +0100993 return 0; /* doesn't matter, frame will be dropped */
994
Johannes Bergb49bb572010-01-08 19:00:00 +0100995 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +0100996
Yoni Divinsky00e96de2012-06-20 15:39:13 +0300997 return ieee80211_select_queue_80211(sdata, skb, hdr);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100998}
999
Johannes Berg587e7292009-01-30 13:35:22 +01001000static const struct net_device_ops ieee80211_monitorif_ops = {
1001 .ndo_open = ieee80211_open,
1002 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001003 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +01001004 .ndo_start_xmit = ieee80211_monitor_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +00001005 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +01001006 .ndo_change_mtu = ieee80211_change_mtu,
1007 .ndo_set_mac_address = eth_mac_addr,
Johannes Bergcf0277e2010-01-05 18:00:58 +01001008 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +01001009};
1010
1011static void ieee80211_if_setup(struct net_device *dev)
1012{
1013 ether_setup(dev);
Neil Horman550fd082011-07-26 06:05:38 +00001014 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Johannes Berg587e7292009-01-30 13:35:22 +01001015 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg587e7292009-01-30 13:35:22 +01001016 dev->destructor = free_netdev;
1017}
1018
Johannes Berg1fa57d02010-06-10 10:21:32 +02001019static void ieee80211_iface_work(struct work_struct *work)
1020{
1021 struct ieee80211_sub_if_data *sdata =
1022 container_of(work, struct ieee80211_sub_if_data, work);
1023 struct ieee80211_local *local = sdata->local;
1024 struct sk_buff *skb;
Johannes Berg344eec62010-06-10 10:21:36 +02001025 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +02001026 struct ieee80211_ra_tid *ra_tid;
Johannes Berg1fa57d02010-06-10 10:21:32 +02001027
1028 if (!ieee80211_sdata_running(sdata))
1029 return;
1030
1031 if (local->scanning)
1032 return;
1033
1034 /*
1035 * ieee80211_queue_work() should have picked up most cases,
1036 * here we'll pick the rest.
1037 */
1038 if (WARN(local->suspended,
1039 "interface work scheduled while going to suspend\n"))
1040 return;
1041
1042 /* first process frames */
1043 while ((skb = skb_dequeue(&sdata->skb_queue))) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001044 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1045
Johannes Bergc1475ca2010-06-10 10:21:37 +02001046 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1047 ra_tid = (void *)&skb->cb;
1048 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1049 ra_tid->tid);
1050 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1051 ra_tid = (void *)&skb->cb;
1052 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1053 ra_tid->tid);
1054 } else if (ieee80211_is_action(mgmt->frame_control) &&
1055 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001056 int len = skb->len;
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001057
Johannes Berga93e3642010-06-10 10:21:46 +02001058 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001059 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001060 if (sta) {
1061 switch (mgmt->u.action.u.addba_req.action_code) {
1062 case WLAN_ACTION_ADDBA_REQ:
1063 ieee80211_process_addba_request(
1064 local, sta, mgmt, len);
1065 break;
1066 case WLAN_ACTION_ADDBA_RESP:
1067 ieee80211_process_addba_resp(local, sta,
1068 mgmt, len);
1069 break;
1070 case WLAN_ACTION_DELBA:
1071 ieee80211_process_delba(sdata, sta,
1072 mgmt, len);
1073 break;
1074 default:
1075 WARN_ON(1);
1076 break;
1077 }
1078 }
Johannes Berga93e3642010-06-10 10:21:46 +02001079 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +02001080 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1081 struct ieee80211_hdr *hdr = (void *)mgmt;
1082 /*
1083 * So the frame isn't mgmt, but frame_control
1084 * is at the right place anyway, of course, so
1085 * the if statement is correct.
1086 *
1087 * Warn if we have other data frame types here,
1088 * they must not get here.
1089 */
1090 WARN_ON(hdr->frame_control &
1091 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1092 WARN_ON(!(hdr->seq_ctrl &
1093 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1094 /*
1095 * This was a fragment of a frame, received while
1096 * a block-ack session was active. That cannot be
1097 * right, so terminate the session.
1098 */
Johannes Berga93e3642010-06-10 10:21:46 +02001099 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001100 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +02001101 if (sta) {
1102 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1103 IEEE80211_QOS_CTL_TID_MASK;
1104
1105 __ieee80211_stop_rx_ba_session(
1106 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +02001107 WLAN_REASON_QSTA_REQUIRE_SETUP,
1108 true);
Johannes Berg344eec62010-06-10 10:21:36 +02001109 }
Johannes Berga93e3642010-06-10 10:21:46 +02001110 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001111 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +02001112 case NL80211_IFTYPE_STATION:
1113 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1114 break;
1115 case NL80211_IFTYPE_ADHOC:
1116 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1117 break;
1118 case NL80211_IFTYPE_MESH_POINT:
1119 if (!ieee80211_vif_is_mesh(&sdata->vif))
1120 break;
1121 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1122 break;
1123 default:
1124 WARN(1, "frame for unexpected interface type");
Johannes Berg1fa57d02010-06-10 10:21:32 +02001125 break;
1126 }
Johannes Berg36b3a622010-06-10 10:21:33 +02001127
1128 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001129 }
1130
1131 /* then other type-dependent work */
1132 switch (sdata->vif.type) {
1133 case NL80211_IFTYPE_STATION:
1134 ieee80211_sta_work(sdata);
1135 break;
1136 case NL80211_IFTYPE_ADHOC:
1137 ieee80211_ibss_work(sdata);
1138 break;
1139 case NL80211_IFTYPE_MESH_POINT:
1140 if (!ieee80211_vif_is_mesh(&sdata->vif))
1141 break;
1142 ieee80211_mesh_work(sdata);
1143 break;
1144 default:
1145 break;
1146 }
1147}
1148
Johannes Berg04ecd252012-09-11 14:34:12 +02001149static void ieee80211_recalc_smps_work(struct work_struct *work)
1150{
1151 struct ieee80211_sub_if_data *sdata =
1152 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1153
1154 ieee80211_recalc_smps(sdata);
1155}
Johannes Berg1fa57d02010-06-10 10:21:32 +02001156
Johannes Berg75636522008-07-09 14:40:35 +02001157/*
1158 * Helper function to initialise an interface to a specific type.
1159 */
1160static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001161 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001162{
Johannes Berg75636522008-07-09 14:40:35 +02001163 /* clear type-dependent union */
1164 memset(&sdata->u, 0, sizeof(sdata->u));
1165
1166 /* and set some type-dependent values */
1167 sdata->vif.type = type;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001168 sdata->vif.p2p = false;
Johannes Berg60719ff2008-09-16 14:55:09 +02001169 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +02001170
Johannes Berga621fa42010-08-27 14:26:54 +03001171 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1172 sdata->control_port_no_encrypt = false;
1173
Simon Wunderlichb53be792011-11-18 14:20:44 +01001174 sdata->noack_map = 0;
1175
Johannes Bergf142c6b2012-06-18 20:07:15 +02001176 /* only monitor/p2p-device differ */
1177 if (sdata->dev) {
1178 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1179 sdata->dev->type = ARPHRD_ETHER;
1180 }
Johannes Berg75636522008-07-09 14:40:35 +02001181
Johannes Berg35f20c12010-06-10 10:21:30 +02001182 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001183 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg04ecd252012-09-11 14:34:12 +02001184 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
Johannes Berg35f20c12010-06-10 10:21:30 +02001185
Johannes Berg75636522008-07-09 14:40:35 +02001186 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001187 case NL80211_IFTYPE_P2P_GO:
1188 type = NL80211_IFTYPE_AP;
1189 sdata->vif.type = type;
1190 sdata->vif.p2p = true;
1191 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001192 case NL80211_IFTYPE_AP:
Marco Porschd012a602012-10-10 12:39:50 -07001193 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
Johannes Berg75636522008-07-09 14:40:35 +02001194 INIT_LIST_HEAD(&sdata->u.ap.vlans);
Johannes Bergad2d2232012-12-14 14:34:25 +01001195 sdata->vif.bss_conf.bssid = sdata->vif.addr;
Johannes Berg75636522008-07-09 14:40:35 +02001196 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001197 case NL80211_IFTYPE_P2P_CLIENT:
1198 type = NL80211_IFTYPE_STATION;
1199 sdata->vif.type = type;
1200 sdata->vif.p2p = true;
1201 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001202 case NL80211_IFTYPE_STATION:
Johannes Bergad2d2232012-12-14 14:34:25 +01001203 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001204 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +02001205 break;
Johannes Berg46900292009-02-15 12:44:28 +01001206 case NL80211_IFTYPE_ADHOC:
Johannes Bergad2d2232012-12-14 14:34:25 +01001207 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
Johannes Berg46900292009-02-15 12:44:28 +01001208 ieee80211_ibss_setup_sdata(sdata);
1209 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001210 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +02001211 if (ieee80211_vif_is_mesh(&sdata->vif))
1212 ieee80211_mesh_init_sdata(sdata);
1213 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001214 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +02001215 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +01001216 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +02001217 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1218 MONITOR_FLAG_OTHER_BSS;
1219 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001220 case NL80211_IFTYPE_WDS:
Johannes Bergad2d2232012-12-14 14:34:25 +01001221 sdata->vif.bss_conf.bssid = NULL;
1222 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001223 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergad2d2232012-12-14 14:34:25 +01001224 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001225 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergad2d2232012-12-14 14:34:25 +01001226 sdata->vif.bss_conf.bssid = sdata->vif.addr;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001227 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001228 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001229 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +02001230 BUG();
1231 break;
1232 }
1233
1234 ieee80211_debugfs_add_netdev(sdata);
1235}
1236
Johannes Berg34d4bc42010-08-27 12:35:58 +02001237static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1238 enum nl80211_iftype type)
1239{
1240 struct ieee80211_local *local = sdata->local;
1241 int ret, err;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001242 enum nl80211_iftype internal_type = type;
1243 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001244
1245 ASSERT_RTNL();
1246
1247 if (!local->ops->change_interface)
1248 return -EBUSY;
1249
1250 switch (sdata->vif.type) {
1251 case NL80211_IFTYPE_AP:
1252 case NL80211_IFTYPE_STATION:
1253 case NL80211_IFTYPE_ADHOC:
1254 /*
1255 * Could maybe also all others here?
1256 * Just not sure how that interacts
1257 * with the RX/config path e.g. for
1258 * mesh.
1259 */
1260 break;
1261 default:
1262 return -EBUSY;
1263 }
1264
1265 switch (type) {
1266 case NL80211_IFTYPE_AP:
1267 case NL80211_IFTYPE_STATION:
1268 case NL80211_IFTYPE_ADHOC:
1269 /*
1270 * Could probably support everything
1271 * but WDS here (WDS do_open can fail
1272 * under memory pressure, which this
1273 * code isn't prepared to handle).
1274 */
1275 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001276 case NL80211_IFTYPE_P2P_CLIENT:
1277 p2p = true;
1278 internal_type = NL80211_IFTYPE_STATION;
1279 break;
1280 case NL80211_IFTYPE_P2P_GO:
1281 p2p = true;
1282 internal_type = NL80211_IFTYPE_AP;
1283 break;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001284 default:
1285 return -EBUSY;
1286 }
1287
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001288 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001289 if (ret)
1290 return ret;
1291
1292 ieee80211_do_stop(sdata, false);
1293
Johannes Bergf142c6b2012-06-18 20:07:15 +02001294 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001295
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001296 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001297 if (ret)
1298 type = sdata->vif.type;
1299
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001300 /*
1301 * Ignore return value here, there's not much we can do since
1302 * the driver changed the interface type internally already.
1303 * The warnings will hopefully make driver authors fix it :-)
1304 */
1305 ieee80211_check_queues(sdata);
1306
Johannes Berg34d4bc42010-08-27 12:35:58 +02001307 ieee80211_setup_sdata(sdata, type);
1308
Johannes Bergf142c6b2012-06-18 20:07:15 +02001309 err = ieee80211_do_open(&sdata->wdev, false);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001310 WARN(err, "type change: do_open returned %d", err);
1311
1312 return ret;
1313}
1314
Johannes Bergf3947e22008-07-09 14:40:36 +02001315int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001316 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001317{
Johannes Berg34d4bc42010-08-27 12:35:58 +02001318 int ret;
1319
Johannes Bergf3947e22008-07-09 14:40:36 +02001320 ASSERT_RTNL();
1321
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001322 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +02001323 return 0;
1324
Johannes Berg34d4bc42010-08-27 12:35:58 +02001325 if (ieee80211_sdata_running(sdata)) {
1326 ret = ieee80211_runtime_change_iftype(sdata, type);
1327 if (ret)
1328 return ret;
1329 } else {
1330 /* Purge and reset type-dependent state. */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001331 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001332 ieee80211_setup_sdata(sdata, type);
1333 }
Johannes Berg75636522008-07-09 14:40:35 +02001334
1335 /* reset some values that shouldn't be kept across type changes */
Johannes Berg75636522008-07-09 14:40:35 +02001336 sdata->drop_unencrypted = 0;
Johannes Berg9bc383d2009-11-19 11:55:19 +01001337 if (type == NL80211_IFTYPE_STATION)
1338 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001339
1340 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001341}
1342
Johannes Bergfa9029f2010-02-25 15:13:11 +01001343static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001344 u8 *perm_addr, enum nl80211_iftype type)
Johannes Bergfa9029f2010-02-25 15:13:11 +01001345{
1346 struct ieee80211_sub_if_data *sdata;
1347 u64 mask, start, addr, val, inc;
1348 u8 *m;
1349 u8 tmp_addr[ETH_ALEN];
1350 int i;
1351
1352 /* default ... something at least */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001353 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001354
1355 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1356 local->hw.wiphy->n_addresses <= 1)
1357 return;
1358
Johannes Bergfa9029f2010-02-25 15:13:11 +01001359 mutex_lock(&local->iflist_mtx);
1360
1361 switch (type) {
1362 case NL80211_IFTYPE_MONITOR:
1363 /* doesn't matter */
1364 break;
1365 case NL80211_IFTYPE_WDS:
1366 case NL80211_IFTYPE_AP_VLAN:
1367 /* match up with an AP interface */
1368 list_for_each_entry(sdata, &local->interfaces, list) {
1369 if (sdata->vif.type != NL80211_IFTYPE_AP)
1370 continue;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001371 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001372 break;
1373 }
1374 /* keep default if no AP interface present */
1375 break;
Johannes Berg6d711172012-06-19 17:19:44 +02001376 case NL80211_IFTYPE_P2P_CLIENT:
1377 case NL80211_IFTYPE_P2P_GO:
1378 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1379 list_for_each_entry(sdata, &local->interfaces, list) {
1380 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1381 continue;
1382 if (!ieee80211_sdata_running(sdata))
1383 continue;
1384 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1385 goto out_unlock;
1386 }
1387 }
1388 /* otherwise fall through */
Johannes Bergfa9029f2010-02-25 15:13:11 +01001389 default:
1390 /* assign a new address if possible -- try n_addresses first */
1391 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1392 bool used = false;
1393
1394 list_for_each_entry(sdata, &local->interfaces, list) {
1395 if (memcmp(local->hw.wiphy->addresses[i].addr,
1396 sdata->vif.addr, ETH_ALEN) == 0) {
1397 used = true;
1398 break;
1399 }
1400 }
1401
1402 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001403 memcpy(perm_addr,
Johannes Bergfa9029f2010-02-25 15:13:11 +01001404 local->hw.wiphy->addresses[i].addr,
1405 ETH_ALEN);
1406 break;
1407 }
1408 }
1409
1410 /* try mask if available */
1411 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1412 break;
1413
1414 m = local->hw.wiphy->addr_mask;
1415 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1416 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1417 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1418
1419 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1420 /* not a contiguous mask ... not handled now! */
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001421 pr_info("not contiguous\n");
Johannes Bergfa9029f2010-02-25 15:13:11 +01001422 break;
1423 }
1424
1425 m = local->hw.wiphy->perm_addr;
1426 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1427 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1428 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1429
1430 inc = 1ULL<<__ffs64(mask);
1431 val = (start & mask);
1432 addr = (start & ~mask) | (val & mask);
1433 do {
1434 bool used = false;
1435
1436 tmp_addr[5] = addr >> 0*8;
1437 tmp_addr[4] = addr >> 1*8;
1438 tmp_addr[3] = addr >> 2*8;
1439 tmp_addr[2] = addr >> 3*8;
1440 tmp_addr[1] = addr >> 4*8;
1441 tmp_addr[0] = addr >> 5*8;
1442
1443 val += inc;
1444
1445 list_for_each_entry(sdata, &local->interfaces, list) {
1446 if (memcmp(tmp_addr, sdata->vif.addr,
1447 ETH_ALEN) == 0) {
1448 used = true;
1449 break;
1450 }
1451 }
1452
1453 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001454 memcpy(perm_addr, tmp_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001455 break;
1456 }
1457 addr = (start & ~mask) | (val & mask);
1458 } while (addr != start);
1459
1460 break;
1461 }
1462
Johannes Berg6d711172012-06-19 17:19:44 +02001463 out_unlock:
Johannes Bergfa9029f2010-02-25 15:13:11 +01001464 mutex_unlock(&local->iflist_mtx);
1465}
1466
Johannes Berg97f97b12012-12-13 22:54:58 +01001467static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1468{
1469 struct ieee80211_sub_if_data *sdata;
1470
1471 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1472
1473 ieee80211_cleanup_sdata_stas(sdata);
1474}
1475
Johannes Berg3e122be2008-07-09 14:40:34 +02001476int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg84efbb82012-06-16 00:00:26 +02001477 struct wireless_dev **new_wdev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001478 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -07001479{
Johannes Bergf142c6b2012-06-18 20:07:15 +02001480 struct net_device *ndev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001481 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +02001482 int ret, i;
Johannes Bergded81f62012-03-28 11:04:26 +02001483 int txqs = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001484
1485 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001486
Johannes Bergf142c6b2012-06-18 20:07:15 +02001487 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1488 struct wireless_dev *wdev;
Johannes Bergded81f62012-03-28 11:04:26 +02001489
Johannes Bergf142c6b2012-06-18 20:07:15 +02001490 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1491 GFP_KERNEL);
1492 if (!sdata)
1493 return -ENOMEM;
1494 wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001495
Johannes Bergf142c6b2012-06-18 20:07:15 +02001496 sdata->dev = NULL;
1497 strlcpy(sdata->name, name, IFNAMSIZ);
1498 ieee80211_assign_perm_addr(local, wdev->address, type);
1499 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1500 } else {
1501 if (local->hw.queues >= IEEE80211_NUM_ACS)
1502 txqs = IEEE80211_NUM_ACS;
Johannes Bergf3994ec2008-05-12 20:51:44 -07001503
Johannes Bergf142c6b2012-06-18 20:07:15 +02001504 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1505 local->hw.vif_data_size,
1506 name, ieee80211_if_setup, txqs, 1);
1507 if (!ndev)
1508 return -ENOMEM;
1509 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Thadeu Lima de Souza Cascardo59e7e702011-06-02 17:28:37 -03001510
Johannes Bergf142c6b2012-06-18 20:07:15 +02001511 ndev->needed_headroom = local->tx_headroom +
1512 4*6 /* four MAC addresses */
1513 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1514 + 6 /* mesh */
1515 + 8 /* rfc1042/bridge tunnel */
1516 - ETH_HLEN /* ethernet hard_header_len */
1517 + IEEE80211_ENCRYPT_HEADROOM;
1518 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
Jiri Bencf0706e82007-05-05 11:45:53 -07001519
Johannes Bergf142c6b2012-06-18 20:07:15 +02001520 ret = dev_alloc_name(ndev, ndev->name);
1521 if (ret < 0) {
1522 free_netdev(ndev);
1523 return ret;
1524 }
1525
1526 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1527 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1528 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1529
1530 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1531 sdata = netdev_priv(ndev);
1532 ndev->ieee80211_ptr = &sdata->wdev;
1533 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1534 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1535
1536 sdata->dev = ndev;
1537 }
Johannes Berg75636522008-07-09 14:40:35 +02001538
1539 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -07001540 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -07001541 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +02001542
1543 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1544 skb_queue_head_init(&sdata->fragments[i].skb_list);
1545
1546 INIT_LIST_HEAD(&sdata->key_list);
1547
Johannes Berg97f97b12012-12-13 22:54:58 +01001548 spin_lock_init(&sdata->cleanup_stations_lock);
1549 INIT_LIST_HEAD(&sdata->cleanup_stations);
1550 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
Simon Wunderlich164eb022013-02-08 18:16:20 +01001551 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1552 ieee80211_dfs_cac_timer_work);
Johannes Berg97f97b12012-12-13 22:54:58 +01001553
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001554 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1555 struct ieee80211_supported_band *sband;
1556 sband = local->hw.wiphy->bands[i];
1557 sdata->rc_rateidx_mask[i] =
1558 sband ? (1 << sband->n_bitrates) - 1 : 0;
Simon Wunderlich19468412012-01-28 17:25:33 +01001559 if (sband)
1560 memcpy(sdata->rc_rateidx_mcs_mask[i],
1561 sband->ht_cap.mcs.rx_mask,
1562 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1563 else
1564 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1565 sizeof(sdata->rc_rateidx_mcs_mask[i]));
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001566 }
Johannes Berg75636522008-07-09 14:40:35 +02001567
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001568 ieee80211_set_default_queues(sdata);
1569
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001570 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1571 sdata->user_power_level = local->user_power_level;
1572
Johannes Berg75636522008-07-09 14:40:35 +02001573 /* setup type-dependent data */
1574 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001575
Johannes Bergf142c6b2012-06-18 20:07:15 +02001576 if (ndev) {
1577 if (params) {
1578 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1579 if (type == NL80211_IFTYPE_STATION)
1580 sdata->u.mgd.use_4addr = params->use_4addr;
1581 }
1582
1583 ndev->features |= local->hw.netdev_features;
1584
1585 ret = register_netdevice(ndev);
1586 if (ret) {
1587 free_netdev(ndev);
1588 return ret;
1589 }
Johannes Berg9bc383d2009-11-19 11:55:19 +01001590 }
1591
Johannes Bergc771c9d2009-01-23 22:54:03 +01001592 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001593 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001594 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001595
Johannes Berg84efbb82012-06-16 00:00:26 +02001596 if (new_wdev)
1597 *new_wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001598
Jiri Bencf0706e82007-05-05 11:45:53 -07001599 return 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001600}
1601
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001602void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001603{
Jiri Bencf0706e82007-05-05 11:45:53 -07001604 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001605
Johannes Bergc771c9d2009-01-23 22:54:03 +01001606 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001607 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001608 mutex_unlock(&sdata->local->iflist_mtx);
1609
Johannes Berg75636522008-07-09 14:40:35 +02001610 synchronize_rcu();
Johannes Bergf142c6b2012-06-18 20:07:15 +02001611
1612 if (sdata->dev) {
1613 unregister_netdevice(sdata->dev);
1614 } else {
1615 cfg80211_unregister_wdev(&sdata->wdev);
1616 kfree(sdata);
1617 }
1618}
1619
1620void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1621{
1622 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1623 return;
1624 ieee80211_do_stop(sdata, true);
1625 ieee80211_teardown_sdata(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001626}
1627
Johannes Berg75636522008-07-09 14:40:35 +02001628/*
1629 * Remove all interfaces, may only be called at hardware unregistration
1630 * time because it doesn't do RCU-safe list removals.
1631 */
1632void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07001633{
Johannes Berg75636522008-07-09 14:40:35 +02001634 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001635 LIST_HEAD(unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001636 LIST_HEAD(wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001637
1638 ASSERT_RTNL();
1639
Eric Dumazetefe117a2009-11-05 11:06:40 +01001640 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001641 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1642 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001643
Johannes Bergf142c6b2012-06-18 20:07:15 +02001644 if (sdata->dev)
1645 unregister_netdevice_queue(sdata->dev, &unreg_list);
1646 else
1647 list_add(&sdata->list, &wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001648 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001649 mutex_unlock(&local->iflist_mtx);
1650 unregister_netdevice_many(&unreg_list);
Eric W. Biederman5f04d502011-02-20 11:49:45 -08001651 list_del(&unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001652
1653 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1654 list_del(&sdata->list);
1655 cfg80211_unregister_wdev(&sdata->wdev);
1656 kfree(sdata);
1657 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001658}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001659
Johannes Berg47846c92009-11-25 17:46:19 +01001660static int netdev_notify(struct notifier_block *nb,
1661 unsigned long state,
1662 void *ndev)
1663{
1664 struct net_device *dev = ndev;
1665 struct ieee80211_sub_if_data *sdata;
1666
1667 if (state != NETDEV_CHANGENAME)
1668 return 0;
1669
1670 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1671 return 0;
1672
1673 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1674 return 0;
1675
1676 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1677
Johannes Berg2f5265e2010-02-12 10:45:05 +01001678 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001679
1680 ieee80211_debugfs_rename_netdev(sdata);
1681 return 0;
1682}
1683
1684static struct notifier_block mac80211_netdev_notifier = {
1685 .notifier_call = netdev_notify,
1686};
1687
1688int ieee80211_iface_init(void)
1689{
1690 return register_netdevice_notifier(&mac80211_netdev_notifier);
1691}
1692
1693void ieee80211_iface_exit(void)
1694{
1695 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1696}