blob: 53ee049efbffbeae5ce87220a5ffdcb4937b2fb3 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
Johannes Bergc5d54fb2013-03-26 21:54:24 +01002 * Interface handling
Johannes Berg0d143fe2008-09-11 00:01:59 +02003 *
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>
Johannes Bergd98ad832014-09-03 15:24:57 +03008 * Copyright 2013-2014 Intel Mobile Communications GmbH
Jiri Bencf0706e82007-05-05 11:45:53 -07009 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/kernel.h>
16#include <linux/if_arp.h>
17#include <linux/netdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/mac80211.h>
Johannes Bergcf0277e2010-01-05 18:00:58 +010020#include <net/ieee80211_radiotap.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070021#include "ieee80211_i.h"
22#include "sta_info.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070023#include "debugfs_netdev.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010024#include "mesh.h"
Johannes Berg0d143fe2008-09-11 00:01:59 +020025#include "led.h"
Johannes Berg24487982009-04-23 18:52:52 +020026#include "driver-ops.h"
Johannes Bergcf0277e2010-01-05 18:00:58 +010027#include "wme.h"
Bill Jordan1be7fe82010-10-01 11:20:41 -040028#include "rate.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070029
Johannes Bergc771c9d2009-01-23 22:54:03 +010030/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020046bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47{
48 struct ieee80211_chanctx_conf *chanctx_conf;
49 int power;
50
51 rcu_read_lock();
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
53 if (!chanctx_conf) {
54 rcu_read_unlock();
55 return false;
56 }
57
Simon Wunderlich0430c882013-07-08 16:55:55 +020058 power = ieee80211_chandef_max_power(&chanctx_conf->def);
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020059 rcu_read_unlock();
60
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
63
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
66
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
70 return true;
71 }
72
73 return false;
74}
75
Lorenzo Bianconidb82d8a2015-01-14 12:55:08 +010076void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
77 bool update_bss)
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020078{
Emmanuel Grumbach5ad11b52015-11-17 10:24:39 +020079 if (__ieee80211_recalc_txpower(sdata) ||
80 (update_bss && ieee80211_sdata_running(sdata)))
Johannes Berg1ea6f9c2012-10-24 10:59:25 +020081 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
82}
Johannes Bergc771c9d2009-01-23 22:54:03 +010083
Johannes Berg62a40a12013-04-08 11:52:34 +020084static u32 __ieee80211_idle_off(struct ieee80211_local *local)
Johannes Bergcc45ae542012-06-21 22:30:52 +020085{
86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
87 return 0;
88
89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
90 return IEEE80211_CONF_CHANGE_IDLE;
91}
92
Johannes Berg62a40a12013-04-08 11:52:34 +020093static u32 __ieee80211_idle_on(struct ieee80211_local *local)
Johannes Bergcc45ae542012-06-21 22:30:52 +020094{
95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
96 return 0;
97
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +020098 ieee80211_flush_queues(local, NULL, false);
Johannes Bergcc45ae542012-06-21 22:30:52 +020099
100 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
101 return IEEE80211_CONF_CHANGE_IDLE;
102}
103
Johannes Berg62a40a12013-04-08 11:52:34 +0200104static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
105 bool force_active)
Johannes Bergcc45ae542012-06-21 22:30:52 +0200106{
Johannes Berg1d5e1262014-02-12 11:29:32 +0100107 bool working, scanning, active;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200108 unsigned int led_trig_start = 0, led_trig_stop = 0;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200109
Johannes Bergcc45ae542012-06-21 22:30:52 +0200110 lockdep_assert_held(&local->mtx);
111
Johannes Berg62a40a12013-04-08 11:52:34 +0200112 active = force_active ||
113 !list_empty(&local->chanctx_list) ||
114 local->monitors;
Johannes Bergcc45ae542012-06-21 22:30:52 +0200115
Johannes Berg1d5e1262014-02-12 11:29:32 +0100116 working = !local->ops->remain_on_channel &&
117 !list_empty(&local->roc_list);
Johannes Bergcc45ae542012-06-21 22:30:52 +0200118
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)
Johannes Berg62a40a12013-04-08 11:52:34 +0200135 return __ieee80211_idle_off(local);
136 return __ieee80211_idle_on(local);
137}
138
139u32 ieee80211_idle_off(struct ieee80211_local *local)
140{
141 return __ieee80211_recalc_idle(local, true);
142}
143
144void ieee80211_recalc_idle(struct ieee80211_local *local)
145{
146 u32 change = __ieee80211_recalc_idle(local, false);
Johannes Bergfd0f9792013-02-07 00:14:51 +0100147 if (change)
148 ieee80211_hw_config(local, change);
Johannes Bergcc45ae542012-06-21 22:30:52 +0200149}
150
Johannes Berg0d143fe2008-09-11 00:01:59 +0200151static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
152{
Chaitanya09b14262012-12-21 17:15:17 +0530153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200154 return -EINVAL;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200155
Johannes Berg0d143fe2008-09-11 00:01:59 +0200156 dev->mtu = new_mtu;
157 return 0;
158}
159
John W. Linville3899ba92013-06-11 14:48:32 -0400160static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200161 bool check_dup)
Helmut Schaa478622e2012-11-27 18:23:06 +0100162{
Helmut Schaaac209762013-05-27 10:43:09 +0200163 struct ieee80211_local *local = sdata->local;
164 struct ieee80211_sub_if_data *iter;
Helmut Schaa478622e2012-11-27 18:23:06 +0100165 u64 new, mask, tmp;
166 u8 *m;
167 int ret = 0;
168
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
170 return 0;
171
172 m = addr;
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
176
177 m = local->hw.wiphy->addr_mask;
178 mask = ((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
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200182 if (!check_dup)
183 return ret;
Helmut Schaa478622e2012-11-27 18:23:06 +0100184
185 mutex_lock(&local->iflist_mtx);
Helmut Schaaac209762013-05-27 10:43:09 +0200186 list_for_each_entry(iter, &local->interfaces, list) {
187 if (iter == sdata)
Helmut Schaa478622e2012-11-27 18:23:06 +0100188 continue;
189
John W. Linville3899ba92013-06-11 14:48:32 -0400190 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
Helmut Schaaac209762013-05-27 10:43:09 +0200192 continue;
193
194 m = iter->vif.addr;
Helmut Schaa478622e2012-11-27 18:23:06 +0100195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
198
199 if ((new & ~mask) != (tmp & ~mask)) {
200 ret = -EINVAL;
201 break;
202 }
203 }
204 mutex_unlock(&local->iflist_mtx);
205
206 return ret;
207}
208
Johannes Berg47846c92009-11-25 17:46:19 +0100209static int ieee80211_change_mac(struct net_device *dev, void *addr)
210{
211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Kalle Valofc5f7572009-12-30 15:54:03 +0200212 struct sockaddr *sa = addr;
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200213 bool check_dup = true;
Johannes Berg47846c92009-11-25 17:46:19 +0100214 int ret;
215
Johannes Berg9607e6b2009-12-23 13:15:31 +0100216 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100217 return -EBUSY;
218
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
221 check_dup = false;
222
John W. Linville3899ba92013-06-11 14:48:32 -0400223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
Helmut Schaa478622e2012-11-27 18:23:06 +0100224 if (ret)
225 return ret;
226
Kalle Valofc5f7572009-12-30 15:54:03 +0200227 ret = eth_mac_addr(dev, sa);
Johannes Berg47846c92009-11-25 17:46:19 +0100228
229 if (ret == 0)
Kalle Valofc5f7572009-12-30 15:54:03 +0200230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100231
232 return ret;
233}
234
Johannes Berg0d143fe2008-09-11 00:01:59 +0200235static inline int identical_mac_addr_allowed(int type1, int type2)
236{
237 return type1 == NL80211_IFTYPE_MONITOR ||
238 type2 == NL80211_IFTYPE_MONITOR ||
Johannes Bergf142c6b2012-06-18 20:07:15 +0200239 type1 == NL80211_IFTYPE_P2P_DEVICE ||
240 type2 == NL80211_IFTYPE_P2P_DEVICE ||
Johannes Berg0d143fe2008-09-11 00:01:59 +0200241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
242 (type1 == NL80211_IFTYPE_WDS &&
243 (type2 == NL80211_IFTYPE_WDS ||
244 type2 == NL80211_IFTYPE_AP)) ||
245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
246 (type1 == NL80211_IFTYPE_AP_VLAN &&
247 (type2 == NL80211_IFTYPE_AP ||
248 type2 == NL80211_IFTYPE_AP_VLAN));
249}
250
Johannes Berg87490f62010-08-27 12:35:57 +0200251static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
252 enum nl80211_iftype iftype)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200253{
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200254 struct ieee80211_local *local = sdata->local;
Johannes Berg87490f62010-08-27 12:35:57 +0200255 struct ieee80211_sub_if_data *nsdata;
Luciano Coelhob6a55012014-02-27 11:07:21 +0200256 int ret;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200257
Johannes Berg87490f62010-08-27 12:35:57 +0200258 ASSERT_RTNL();
Johannes Berg0d143fe2008-09-11 00:01:59 +0200259
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata, &local->interfaces, list) {
Johannes Berg371a2552012-06-19 15:54:05 +0200262 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200263 /*
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100264 * Only OCB and monitor mode may coexist
265 */
266 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
268 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
269 nsdata->vif.type == NL80211_IFTYPE_OCB))
270 return -EBUSY;
271
272 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
276 *
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
281 */
Johannes Berg87490f62010-08-27 12:35:57 +0200282 if (iftype == NL80211_IFTYPE_ADHOC &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200283 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
284 return -EBUSY;
Simon Wunderlich73da7d52013-07-11 16:09:06 +0200285 /*
286 * will not add another interface while any channel
287 * switch is active.
288 */
289 if (nsdata->vif.csa_active)
290 return -EBUSY;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200291
292 /*
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
295 */
Johannes Berg371a2552012-06-19 15:54:05 +0200296 if (!ether_addr_equal(sdata->vif.addr,
297 nsdata->vif.addr))
Johannes Berg0d143fe2008-09-11 00:01:59 +0200298 continue;
299
300 /*
301 * check whether it may have the same address
302 */
Johannes Berg87490f62010-08-27 12:35:57 +0200303 if (!identical_mac_addr_allowed(iftype,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200304 nsdata->vif.type))
305 return -ENOTUNIQ;
306
307 /*
308 * can only add VLANs to enabled APs
309 */
Johannes Berg87490f62010-08-27 12:35:57 +0200310 if (iftype == NL80211_IFTYPE_AP_VLAN &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200311 nsdata->vif.type == NL80211_IFTYPE_AP)
312 sdata->bss = &nsdata->u.ap;
313 }
314 }
315
Luciano Coelhob6a55012014-02-27 11:07:21 +0200316 mutex_lock(&local->chanctx_mtx);
317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
318 mutex_unlock(&local->chanctx_mtx);
319 return ret;
Johannes Berg87490f62010-08-27 12:35:57 +0200320}
321
Johannes Berga9865532013-08-26 09:30:32 +0200322static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
323 enum nl80211_iftype iftype)
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200324{
325 int n_queues = sdata->local->hw.queues;
326 int i;
327
Johannes Berga9865532013-08-26 09:30:32 +0200328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
Ilan Peer0ef24e52012-08-21 12:43:35 +0300329 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
331 IEEE80211_INVAL_HW_QUEUE))
332 return -EINVAL;
333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
334 n_queues))
335 return -EINVAL;
336 }
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200337 }
338
Johannes Berga9865532013-08-26 09:30:32 +0200339 if ((iftype != NL80211_IFTYPE_AP &&
340 iftype != NL80211_IFTYPE_P2P_GO &&
341 iftype != NL80211_IFTYPE_MESH_POINT) ||
Johannes Berg30686bf2015-06-02 21:39:54 +0200342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
344 return 0;
345 }
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
348 return -EINVAL;
349
350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
351 return -EINVAL;
352
353 return 0;
354}
355
Christian Lamparter85416a42010-10-02 13:17:07 +0200356void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
357 const int offset)
358{
359 struct ieee80211_local *local = sdata->local;
360 u32 flags = sdata->u.mntr_flags;
361
362#define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
365 } while (0)
366
367 ADJUST(FCSFAIL, fcsfail);
368 ADJUST(PLCPFAIL, plcpfail);
369 ADJUST(CONTROL, control);
370 ADJUST(CONTROL, pspoll);
371 ADJUST(OTHER_BSS, other_bss);
372
373#undef ADJUST
374}
375
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200376static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
377{
378 struct ieee80211_local *local = sdata->local;
379 int i;
380
381 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
Johannes Berg30686bf2015-06-02 21:39:54 +0200382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
Johannes Berga9d3c052012-05-07 17:45:29 +0200384 else if (local->hw.queues >= IEEE80211_NUM_ACS)
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200385 sdata->vif.hw_queue[i] = i;
Johannes Berga9d3c052012-05-07 17:45:29 +0200386 else
387 sdata->vif.hw_queue[i] = 0;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200388 }
389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
390}
391
Johannes Berg3c3e21e2013-03-27 23:20:27 +0100392int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200393{
394 struct ieee80211_sub_if_data *sdata;
Johannes Berg8b305782013-03-20 22:25:17 +0100395 int ret;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200396
Johannes Berg30686bf2015-06-02 21:39:54 +0200397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200398 return 0;
399
Johannes Berg8b305782013-03-20 22:25:17 +0100400 ASSERT_RTNL();
Johannes Berg685fb722012-07-11 16:38:09 +0200401
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200402 if (local->monitor_sdata)
Johannes Berg8b305782013-03-20 22:25:17 +0100403 return 0;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200404
405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
Johannes Berg8b305782013-03-20 22:25:17 +0100406 if (!sdata)
407 return -ENOMEM;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200408
409 /* set up data */
410 sdata->local = local;
411 sdata->vif.type = NL80211_IFTYPE_MONITOR;
412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
413 wiphy_name(local->hw.wiphy));
Emmanuel Grumbach34171dc2014-05-25 15:35:41 +0300414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200415
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
417
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200418 ieee80211_set_default_queues(sdata);
419
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200420 ret = drv_add_interface(local, sdata);
421 if (WARN_ON(ret)) {
422 /* ok .. stupid driver, it asked for this! */
423 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100424 return ret;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200425 }
426
Johannes Berga9865532013-08-26 09:30:32 +0200427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200428 if (ret) {
429 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100430 return ret;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200431 }
432
Johannes Bergfab57a62014-01-29 13:28:02 +0100433 mutex_lock(&local->iflist_mtx);
434 rcu_assign_pointer(local->monitor_sdata, sdata);
435 mutex_unlock(&local->iflist_mtx);
436
Johannes Berg34a37402013-12-18 09:43:33 +0100437 mutex_lock(&local->mtx);
Johannes Berg4bf88532012-11-09 11:39:59 +0100438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
Johannes Berg55de9082012-07-26 17:24:39 +0200439 IEEE80211_CHANCTX_EXCLUSIVE);
Johannes Berg34a37402013-12-18 09:43:33 +0100440 mutex_unlock(&local->mtx);
Johannes Berg55de9082012-07-26 17:24:39 +0200441 if (ret) {
Johannes Bergfab57a62014-01-29 13:28:02 +0100442 mutex_lock(&local->iflist_mtx);
Monam Agarwal0c2bef462014-03-24 00:51:43 +0530443 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Bergfab57a62014-01-29 13:28:02 +0100444 mutex_unlock(&local->iflist_mtx);
445 synchronize_net();
Johannes Berg55de9082012-07-26 17:24:39 +0200446 drv_remove_interface(local, sdata);
447 kfree(sdata);
Johannes Berg8b305782013-03-20 22:25:17 +0100448 return ret;
Johannes Berg55de9082012-07-26 17:24:39 +0200449 }
450
Johannes Berg8b305782013-03-20 22:25:17 +0100451 return 0;
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200452}
453
Johannes Berg3c3e21e2013-03-27 23:20:27 +0100454void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200455{
456 struct ieee80211_sub_if_data *sdata;
457
Johannes Berg30686bf2015-06-02 21:39:54 +0200458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200459 return;
460
Johannes Berg8b305782013-03-20 22:25:17 +0100461 ASSERT_RTNL();
462
Johannes Berg685fb722012-07-11 16:38:09 +0200463 mutex_lock(&local->iflist_mtx);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200464
Johannes Berg685fb722012-07-11 16:38:09 +0200465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
Johannes Berg8b305782013-03-20 22:25:17 +0100467 if (!sdata) {
468 mutex_unlock(&local->iflist_mtx);
469 return;
470 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200471
Monam Agarwal0c2bef462014-03-24 00:51:43 +0530472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg8b305782013-03-20 22:25:17 +0100473 mutex_unlock(&local->iflist_mtx);
474
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200475 synchronize_net();
476
Johannes Berg34a37402013-12-18 09:43:33 +0100477 mutex_lock(&local->mtx);
Johannes Berg55de9082012-07-26 17:24:39 +0200478 ieee80211_vif_release_channel(sdata);
Johannes Berg34a37402013-12-18 09:43:33 +0100479 mutex_unlock(&local->mtx);
Johannes Berg55de9082012-07-26 17:24:39 +0200480
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200481 drv_remove_interface(local, sdata);
482
483 kfree(sdata);
484}
485
Johannes Berg34d4bc42010-08-27 12:35:58 +0200486/*
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
490 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200491int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
Johannes Berg87490f62010-08-27 12:35:57 +0200492{
Johannes Bergf142c6b2012-06-18 20:07:15 +0200493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
Johannes Berg87490f62010-08-27 12:35:57 +0200495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
497 u32 changed = 0;
498 int res;
499 u32 hw_reconf_flags = 0;
500
Johannes Berg0d143fe2008-09-11 00:01:59 +0200501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 return -ENOLINK;
505 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
508
Johannes Berg0d143fe2008-09-11 00:01:59 +0200509 if (!sdata->bss)
510 return -ENOLINK;
Johannes Berg665c93a2011-11-04 11:18:11 +0100511
Michal Kazior4e141da2014-03-05 13:14:08 +0100512 mutex_lock(&local->mtx);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
Michal Kazior4e141da2014-03-05 13:14:08 +0100514 mutex_unlock(&local->mtx);
Johannes Berg665c93a2011-11-04 11:18:11 +0100515
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
Johannes Berg1351c5d2013-05-23 23:09:56 +0200522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
Felix Fietkau2967e032014-11-24 18:12:16 +0100525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
Michal Kaziorf9dca802015-05-13 09:16:48 +0000526
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
531
Johannes Berg0d143fe2008-09-11 00:01:59 +0200532 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100533 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
536 break;
537 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200541 case NL80211_IFTYPE_P2P_DEVICE:
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100542 case NL80211_IFTYPE_OCB:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200543 /* no special treatment */
544 break;
545 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200546 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200547 case NL80211_IFTYPE_P2P_CLIENT:
548 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200549 /* cannot happen */
550 WARN_ON(1);
551 break;
552 }
553
554 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200555 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200556 if (res)
557 goto err_del_bss;
Johannes Berge8975582008-10-09 12:18:51 +0200558 /* we're brought up, everything changes */
559 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200560 ieee80211_led_radio(local, true);
Johannes Berg67408c82010-11-30 08:59:23 +0100561 ieee80211_mod_tpt_led_trig(local,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200563 }
564
565 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200568 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200569 if (dev && is_zero_ether_addr(dev->dev_addr)) {
Johannes Bergbf533e02010-08-27 12:35:56 +0200570 memcpy(dev->dev_addr,
571 local->hw.wiphy->perm_addr,
572 ETH_ALEN);
573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200574
Johannes Bergbf533e02010-08-27 12:35:56 +0200575 if (!is_valid_ether_addr(dev->dev_addr)) {
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200576 res = -EADDRNOTAVAIL;
577 goto err_stop;
John W. Linville0adc23f2009-10-06 16:27:18 -0400578 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200579 }
580
Johannes Berg0d143fe2008-09-11 00:01:59 +0200581 switch (sdata->vif.type) {
582 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg4d76d212012-12-11 20:38:41 +0100583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata->bss->beacon)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata);
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200586 netif_carrier_on(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100587 } else {
Johannes Berg3edaf3e2012-04-03 10:24:00 +0200588 netif_carrier_off(dev);
Johannes Berg4d76d212012-12-11 20:38:41 +0100589 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200590 break;
591 case NL80211_IFTYPE_MONITOR:
592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
593 local->cooked_mntrs++;
594 break;
595 }
596
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
598 res = drv_add_interface(local, sdata);
599 if (res)
600 goto err_stop;
601 } else if (local->monitors == 0 && local->open_count == 0) {
Johannes Berg075e0842012-07-12 19:28:31 +0200602 res = ieee80211_add_virtual_monitor(local);
603 if (res)
604 goto err_stop;
605 }
606
Johannes Berg0d143fe2008-09-11 00:01:59 +0200607 /* must be before the call to ieee80211_configure_filter */
608 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200609 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200612 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200613
Christian Lamparter85416a42010-10-02 13:17:07 +0200614 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200615 ieee80211_configure_filter(local);
Felix Fietkau801d9292013-03-02 19:05:47 +0100616 mutex_lock(&local->mtx);
617 ieee80211_recalc_idle(local);
618 mutex_unlock(&local->mtx);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200619
620 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200621 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200622 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200623 if (coming_up) {
Johannes Berg075e0842012-07-12 19:28:31 +0200624 ieee80211_del_virtual_monitor(local);
625
Johannes Berg7b7eab62011-11-03 14:41:13 +0100626 res = drv_add_interface(local, sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200627 if (res)
628 goto err_stop;
Johannes Berga9865532013-08-26 09:30:32 +0200629 res = ieee80211_check_queues(sdata,
630 ieee80211_vif_type_p2p(&sdata->vif));
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200631 if (res)
632 goto err_del_interface;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200633 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200634
Johannes Berg29cbe682010-12-03 09:20:44 +0100635 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400636 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200637 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400638
Igor Perminove3b90ca2009-08-04 16:48:51 +0400639 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
641 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700642 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400643
Johannes Bergf142c6b2012-06-18 20:07:15 +0200644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
645 changed |= ieee80211_reset_erp_info(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200646 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200647
Johannes Bergc405c622012-07-30 19:44:12 +0200648 switch (sdata->vif.type) {
649 case NL80211_IFTYPE_STATION:
650 case NL80211_IFTYPE_ADHOC:
651 case NL80211_IFTYPE_AP:
652 case NL80211_IFTYPE_MESH_POINT:
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100653 case NL80211_IFTYPE_OCB:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200654 netif_carrier_off(dev);
Johannes Bergc405c622012-07-30 19:44:12 +0200655 break;
Johannes Berg1411af12012-07-30 19:48:09 +0200656 case NL80211_IFTYPE_WDS:
Johannes Bergf142c6b2012-06-18 20:07:15 +0200657 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berg1411af12012-07-30 19:48:09 +0200658 break;
Johannes Bergc405c622012-07-30 19:44:12 +0200659 default:
Johannes Berga2310822013-03-26 22:10:02 +0100660 /* not reached */
661 WARN_ON(1);
Johannes Bergc405c622012-07-30 19:44:12 +0200662 }
Eliad Peller59034592011-10-16 10:57:31 +0200663
664 /*
Johannes Bergcec66282015-10-22 17:46:04 +0200665 * Set default queue parameters so drivers don't
Eliad Peller59034592011-10-16 10:57:31 +0200666 * need to initialise the hardware if the hardware
Johannes Bergcec66282015-10-22 17:46:04 +0200667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
Eliad Peller59034592011-10-16 10:57:31 +0200669 */
Johannes Bergcec66282015-10-22 17:46:04 +0200670 ieee80211_set_wmm_default(sdata, true,
671 sdata->vif.type != NL80211_IFTYPE_STATION);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200672 }
673
Johannes Berg2d2080c2010-09-15 15:13:13 +0200674 set_bit(SDATA_STATE_RUNNING, &sdata->state);
675
Johannes Berg0d143fe2008-09-11 00:01:59 +0200676 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
677 /* Create STA entry for the WDS peer */
678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
679 GFP_KERNEL);
680 if (!sta) {
681 res = -ENOMEM;
682 goto err_del_interface;
683 }
684
Johannes Berg83d5cc02012-01-12 09:31:10 +0100685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200688
689 res = sta_info_insert(sta);
690 if (res) {
691 /* STA has been freed */
692 goto err_del_interface;
693 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400694
695 rate_control_rate_init(sta);
Johannes Berg1411af12012-07-30 19:48:09 +0200696 netif_carrier_on(dev);
Johannes Bergf142c6b2012-06-18 20:07:15 +0200697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
698 rcu_assign_pointer(local->p2p_sdata, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200699 }
700
Johannes Berg0d143fe2008-09-11 00:01:59 +0200701 /*
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
705 */
706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
707 atomic_inc(&local->iff_allmultis);
708
Johannes Berg34d4bc42010-08-27 12:35:58 +0200709 if (coming_up)
710 local->open_count++;
711
Eliad Peller59034592011-10-16 10:57:31 +0200712 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200713 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200714
Johannes Berg4a733ef2015-10-14 18:02:43 +0200715 ieee80211_recalc_ps(local);
Johannes Berg965beda2009-04-16 13:17:24 +0200716
Johannes Berg2b436312013-05-23 21:04:38 +0200717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev);
721 } else if (dev) {
Johannes Berg2b730da2013-03-26 22:23:20 +0100722 unsigned long flags;
723 int n_acs = IEEE80211_NUM_ACS;
724 int ac;
725
726 if (local->hw.queues < IEEE80211_NUM_ACS)
727 n_acs = 1;
728
729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
733 for (ac = 0; ac < n_acs; ac++) {
734 int ac_queue = sdata->vif.hw_queue[ac];
735
736 if (local->queue_stop_reasons[ac_queue] == 0 &&
737 skb_queue_empty(&local->pending[ac_queue]))
738 netif_start_subqueue(dev, ac);
739 }
740 }
741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
742 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200743
744 return 0;
745 err_del_interface:
Johannes Berg7b7eab62011-11-03 14:41:13 +0100746 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200747 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200748 if (!local->open_count)
749 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200750 err_del_bss:
751 sdata->bss = NULL;
Michal Kazior4e141da2014-03-05 13:14:08 +0100752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
753 mutex_lock(&local->mtx);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200754 list_del(&sdata->u.vlan.list);
Michal Kazior4e141da2014-03-05 13:14:08 +0100755 mutex_unlock(&local->mtx);
756 }
Johannes Berg4d6c36f2012-04-03 14:45:54 +0200757 /* might already be clear but that doesn't matter */
Johannes Berg2d2080c2010-09-15 15:13:13 +0200758 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200759 return res;
760}
761
Johannes Berg34d4bc42010-08-27 12:35:58 +0200762static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200763{
764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200765 int err;
766
767 /* fail early if user set an invalid address */
Mohammed Shafi Shajakhan2fcf28242011-07-12 15:19:04 +0530768 if (!is_valid_ether_addr(dev->dev_addr))
Johannes Berg34d4bc42010-08-27 12:35:58 +0200769 return -EADDRNOTAVAIL;
770
771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
772 if (err)
773 return err;
774
Johannes Bergf142c6b2012-06-18 20:07:15 +0200775 return ieee80211_do_open(&sdata->wdev, true);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200776}
777
778static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
779 bool going_down)
780{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200781 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200782 unsigned long flags;
783 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200784 u32 hw_reconf_flags = 0;
Johannes Berg09f41142012-12-13 23:26:57 +0100785 int i, flushed;
Michael Braun397a7a22013-02-13 16:49:15 +0100786 struct ps_data *ps;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +0100787 struct cfg80211_chan_def chandef;
Johannes Berg46238842014-10-21 20:56:42 +0200788 bool cancel_scan;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200789
Rajkumar Manoharanc29acf22011-05-14 09:43:28 +0530790 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
791
Johannes Berg46238842014-10-21 20:56:42 +0200792 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
793 if (cancel_scan)
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700794 ieee80211_scan_cancel(local);
795
Johannes Berg0d143fe2008-09-11 00:01:59 +0200796 /*
797 * Stop TX on this interface first.
798 */
Johannes Bergf142c6b2012-06-18 20:07:15 +0200799 if (sdata->dev)
800 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200801
Johannes Bergc8f994e2013-03-27 22:49:19 +0100802 ieee80211_roc_purge(local, sdata);
Johannes Bergaf6b6372009-12-23 13:15:35 +0100803
Emmanuel Grumbach8ffcc702014-01-23 14:28:16 +0200804 switch (sdata->vif.type) {
805 case NL80211_IFTYPE_STATION:
Johannes Berg572078b2013-02-15 11:47:50 +0100806 ieee80211_mgd_stop(sdata);
Emmanuel Grumbach8ffcc702014-01-23 14:28:16 +0200807 break;
808 case NL80211_IFTYPE_ADHOC:
Simon Wunderlichcd7760e2013-08-28 13:41:31 +0200809 ieee80211_ibss_stop(sdata);
Emmanuel Grumbach8ffcc702014-01-23 14:28:16 +0200810 break;
811 case NL80211_IFTYPE_AP:
812 cancel_work_sync(&sdata->u.ap.request_smps_work);
813 break;
814 default:
815 break;
816 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +0200817
Johannes Bergaf6b6372009-12-23 13:15:35 +0100818 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200819 * Remove all stations associated with this interface.
820 *
821 * This must be done before calling ops->remove_interface()
822 * because otherwise we can later invoke ops->sta_notify()
823 * whenever the STAs are removed, and that invalidates driver
824 * assumptions about always getting a vif pointer that is valid
825 * (because if we remove a STA after ops->remove_interface()
826 * the driver will have removed the vif info already!)
827 *
Johannes Berg5eb8f4d2015-04-13 14:56:51 +0200828 * In WDS mode a station must exist here and be flushed, for
829 * AP_VLANs stations may exist since there's nothing else that
830 * would have removed them, but in other modes there shouldn't
831 * be any stations.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200832 */
Johannes Bergd34ba212013-12-04 22:46:11 +0100833 flushed = sta_info_flush(sdata);
Johannes Berg5eb8f4d2015-04-13 14:56:51 +0200834 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
835 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
836 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
Johannes Berg0d143fe2008-09-11 00:01:59 +0200837
Johannes Bergdf140462015-04-22 14:40:58 +0200838 /* don't count this interface for allmulti while it is down */
Johannes Berg0d143fe2008-09-11 00:01:59 +0200839 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
840 atomic_dec(&local->iff_allmultis);
841
Johannes Berg7be50862010-10-13 12:06:24 +0200842 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400843 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200844 local->fif_probe_req--;
845 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
846 local->fif_probe_req--;
847 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400848
Johannes Bergf142c6b2012-06-18 20:07:15 +0200849 if (sdata->dev) {
850 netif_addr_lock_bh(sdata->dev);
851 spin_lock_bh(&local->filter_lock);
852 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
853 sdata->dev->addr_len);
854 spin_unlock_bh(&local->filter_lock);
855 netif_addr_unlock_bh(sdata->dev);
Johannes Bergf142c6b2012-06-18 20:07:15 +0200856 }
Johannes Berg3ac64be2009-08-17 16:16:53 +0200857
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800858 del_timer_sync(&local->dynamic_ps_timer);
859 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200860
Johannes Berg04ecd252012-09-11 14:34:12 +0200861 cancel_work_sync(&sdata->recalc_smps);
Michal Kaziordbd72852014-01-29 07:56:21 +0100862 sdata_lock(sdata);
Michal Kazior59af6922014-04-09 15:10:59 +0200863 mutex_lock(&local->mtx);
Simon Wunderlich73da7d52013-07-11 16:09:06 +0200864 sdata->vif.csa_active = false;
Luciano Coelho0c21e632014-10-08 09:48:39 +0300865 if (sdata->vif.type == NL80211_IFTYPE_STATION)
866 sdata->u.mgd.csa_waiting_bcn = false;
Luciano Coelhoa46992b2014-06-13 16:30:07 +0300867 if (sdata->csa_block_tx) {
868 ieee80211_wake_vif_queues(local, sdata,
869 IEEE80211_QUEUE_STOP_REASON_CSA);
870 sdata->csa_block_tx = false;
871 }
Michal Kazior59af6922014-04-09 15:10:59 +0200872 mutex_unlock(&local->mtx);
Michal Kaziordbd72852014-01-29 07:56:21 +0100873 sdata_unlock(sdata);
Michal Kazior59af6922014-04-09 15:10:59 +0200874
Simon Wunderlich73da7d52013-07-11 16:09:06 +0200875 cancel_work_sync(&sdata->csa_finalize_work);
Johannes Berg04ecd252012-09-11 14:34:12 +0200876
Simon Wunderlich164eb022013-02-08 18:16:20 +0100877 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
878
879 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +0100880 chandef = sdata->vif.bss_conf.chandef;
Johannes Bergb2c09582013-03-27 23:24:53 +0100881 WARN_ON(local->suspended);
Johannes Berg34a37402013-12-18 09:43:33 +0100882 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +0100883 ieee80211_vif_release_channel(sdata);
Johannes Berg34a37402013-12-18 09:43:33 +0100884 mutex_unlock(&local->mtx);
Janusz Dziedzicd2859df2013-11-06 13:55:51 +0100885 cfg80211_cac_event(sdata->dev, &chandef,
886 NL80211_RADAR_CAC_ABORTED,
Simon Wunderlich164eb022013-02-08 18:16:20 +0100887 GFP_KERNEL);
888 }
889
Johannes Berg0d143fe2008-09-11 00:01:59 +0200890 /* APs need special treatment */
891 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200892 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200893
894 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200895 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200896 u.vlan.list)
897 dev_close(vlan->dev);
898 WARN_ON(!list_empty(&sdata->u.ap.vlans));
Michael Braun397a7a22013-02-13 16:49:15 +0100899 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
900 /* remove all packets in parent bc_buf pointing to this dev */
901 ps = &sdata->bss->ps;
902
903 spin_lock_irqsave(&ps->bc_buf.lock, flags);
904 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
905 if (skb->dev == sdata->dev) {
906 __skb_unlink(skb, &ps->bc_buf);
907 local->total_ps_buffered--;
908 ieee80211_free_txskb(&local->hw, skb);
909 }
910 }
911 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200912 }
913
Johannes Berg34d4bc42010-08-27 12:35:58 +0200914 if (going_down)
915 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200916
917 switch (sdata->vif.type) {
918 case NL80211_IFTYPE_AP_VLAN:
Michal Kazior4e141da2014-03-05 13:14:08 +0100919 mutex_lock(&local->mtx);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200920 list_del(&sdata->u.vlan.list);
Michal Kazior4e141da2014-03-05 13:14:08 +0100921 mutex_unlock(&local->mtx);
Monam Agarwal0c2bef462014-03-24 00:51:43 +0530922 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
Felix Fietkau10b68482014-10-27 11:56:06 +0100923 /* see comment in the default case below */
924 ieee80211_free_keys(sdata, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200925 /* no need to tell driver */
926 break;
927 case NL80211_IFTYPE_MONITOR:
928 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
929 local->cooked_mntrs--;
930 break;
931 }
932
933 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200934 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100935 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
936 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200937 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200938
Christian Lamparter85416a42010-10-02 13:17:07 +0200939 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200940 break;
Johannes Bergf142c6b2012-06-18 20:07:15 +0200941 case NL80211_IFTYPE_P2P_DEVICE:
942 /* relies on synchronize_rcu() below */
Monam Agarwal0c2bef462014-03-24 00:51:43 +0530943 RCU_INIT_POINTER(local->p2p_sdata, NULL);
Johannes Bergf142c6b2012-06-18 20:07:15 +0200944 /* fall through */
Johannes Berg0d143fe2008-09-11 00:01:59 +0200945 default:
Johannes Berg0b7dff42012-12-05 09:49:14 +0100946 cancel_work_sync(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200947 /*
948 * When we get here, the interface is marked down.
Johannes Berg7907c7d2013-12-04 23:47:09 +0100949 * Free the remaining keys, if there are any
Felix Fietkau10b68482014-10-27 11:56:06 +0100950 * (which can happen in AP mode if userspace sets
951 * keys before the interface is operating, and maybe
952 * also in WDS mode)
Johannes Berg75de9112012-12-14 14:56:03 +0100953 *
Johannes Berg7907c7d2013-12-04 23:47:09 +0100954 * Force the key freeing to always synchronize_net()
955 * to wait for the RX path in case it is using this
Felix Fietkau10b68482014-10-27 11:56:06 +0100956 * interface enqueuing frames at this very time on
Johannes Berg75de9112012-12-14 14:56:03 +0100957 * another CPU.
Johannes Berg35f20c12010-06-10 10:21:30 +0200958 */
Johannes Berg7907c7d2013-12-04 23:47:09 +0100959 ieee80211_free_keys(sdata, true);
Johannes Berg1861b842013-02-23 01:17:56 +0100960 skb_queue_purge(&sdata->skb_queue);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200961 }
962
963 sdata->bss = NULL;
964
Johannes Berg5061b0c2009-07-14 00:33:34 +0200965 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
966 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
967 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
968 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
969 if (info->control.vif == &sdata->vif) {
970 __skb_unlink(skb, &local->pending[i]);
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200971 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200972 }
973 }
974 }
975 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg075e0842012-07-12 19:28:31 +0200976
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100977 if (sdata->vif.txq) {
978 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
979
980 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
981 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
982 }
983
Johannes Bergb2c09582013-03-27 23:24:53 +0100984 if (local->open_count == 0)
985 ieee80211_clear_tx_pending(local);
986
987 /*
988 * If the interface goes down while suspended, presumably because
989 * the device was unplugged and that happens before our resume,
990 * then the driver is already unconfigured and the remainder of
991 * this function isn't needed.
992 * XXX: what about WoWLAN? If the device has software state, e.g.
993 * memory allocated, it might expect teardown commands from
994 * mac80211 here?
995 */
996 if (local->suspended) {
997 WARN_ON(local->wowlan);
998 WARN_ON(rtnl_dereference(local->monitor_sdata));
999 return;
1000 }
1001
1002 switch (sdata->vif.type) {
1003 case NL80211_IFTYPE_AP_VLAN:
1004 break;
1005 case NL80211_IFTYPE_MONITOR:
1006 if (local->monitors == 0)
1007 ieee80211_del_virtual_monitor(local);
1008
1009 mutex_lock(&local->mtx);
1010 ieee80211_recalc_idle(local);
1011 mutex_unlock(&local->mtx);
Felix Fietkau31eba5b2013-05-28 13:01:53 +02001012
1013 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1014 break;
1015
1016 /* fall through */
Johannes Bergb2c09582013-03-27 23:24:53 +01001017 default:
1018 if (going_down)
1019 drv_remove_interface(local, sdata);
1020 }
1021
Johannes Berg4a733ef2015-10-14 18:02:43 +02001022 ieee80211_recalc_ps(local);
Johannes Bergb2c09582013-03-27 23:24:53 +01001023
Johannes Berg46238842014-10-21 20:56:42 +02001024 if (cancel_scan)
1025 flush_delayed_work(&local->scan_work);
1026
Johannes Bergb2c09582013-03-27 23:24:53 +01001027 if (local->open_count == 0) {
1028 ieee80211_stop_device(local);
1029
1030 /* no reconfiguring after stop! */
1031 return;
1032 }
1033
1034 /* do after stop to avoid reconfiguring when we stop anyway */
1035 ieee80211_configure_filter(local);
1036 ieee80211_hw_config(local, hw_reconf_flags);
1037
1038 if (local->monitors == local->open_count)
Johannes Berg075e0842012-07-12 19:28:31 +02001039 ieee80211_add_virtual_monitor(local);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001040}
1041
1042static int ieee80211_stop(struct net_device *dev)
1043{
1044 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1045
1046 ieee80211_do_stop(sdata, true);
Johannes Berg5061b0c2009-07-14 00:33:34 +02001047
Johannes Berg0d143fe2008-09-11 00:01:59 +02001048 return 0;
1049}
1050
1051static void ieee80211_set_multicast_list(struct net_device *dev)
1052{
Johannes Berg0d143fe2008-09-11 00:01:59 +02001053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +02001054 struct ieee80211_local *local = sdata->local;
Johannes Bergdf140462015-04-22 14:40:58 +02001055 int allmulti, sdata_allmulti;
Johannes Berg0d143fe2008-09-11 00:01:59 +02001056
1057 allmulti = !!(dev->flags & IFF_ALLMULTI);
Johannes Berg0d143fe2008-09-11 00:01:59 +02001058 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
Johannes Berg0d143fe2008-09-11 00:01:59 +02001059
1060 if (allmulti != sdata_allmulti) {
1061 if (dev->flags & IFF_ALLMULTI)
1062 atomic_inc(&local->iff_allmultis);
1063 else
1064 atomic_dec(&local->iff_allmultis);
1065 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1066 }
1067
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001068 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001069 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001070 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +02001071 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +02001072}
1073
Johannes Berg75636522008-07-09 14:40:35 +02001074/*
1075 * Called when the netdev is removed or, by the code below, before
1076 * the interface type changes.
1077 */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001078static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001079{
1080 int i;
1081
Johannes Berg75636522008-07-09 14:40:35 +02001082 /* free extra data */
Johannes Berg7907c7d2013-12-04 23:47:09 +01001083 ieee80211_free_keys(sdata, false);
Jiri Bencf0706e82007-05-05 11:45:53 -07001084
Jouni Malinenaee14ce2008-09-09 16:33:15 +02001085 ieee80211_debugfs_remove_netdev(sdata);
1086
Johannes Berg988c0f72008-04-17 19:21:22 +02001087 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e82007-05-05 11:45:53 -07001088 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +02001089 sdata->fragment_next = 0;
1090
Johannes Bergb9dcf712010-08-27 12:35:54 +02001091 if (ieee80211_vif_is_mesh(&sdata->vif))
1092 mesh_rmc_free(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001093}
1094
Johannes Bergf142c6b2012-06-18 20:07:15 +02001095static void ieee80211_uninit(struct net_device *dev)
1096{
1097 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1098}
1099
Johannes Bergcf0277e2010-01-05 18:00:58 +01001100static u16 ieee80211_netdev_select_queue(struct net_device *dev,
Jason Wangf663dd92014-01-10 16:18:26 +08001101 struct sk_buff *skb,
Daniel Borkmann99932d42014-02-16 15:55:20 +01001102 void *accel_priv,
1103 select_queue_fallback_t fallback)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001104{
1105 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1106}
1107
Johannes Berg5a490512015-04-22 17:10:38 +02001108static struct rtnl_link_stats64 *
1109ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1110{
1111 int i;
1112
1113 for_each_possible_cpu(i) {
1114 const struct pcpu_sw_netstats *tstats;
1115 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1116 unsigned int start;
1117
1118 tstats = per_cpu_ptr(dev->tstats, i);
1119
1120 do {
1121 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1122 rx_packets = tstats->rx_packets;
1123 tx_packets = tstats->tx_packets;
1124 rx_bytes = tstats->rx_bytes;
1125 tx_bytes = tstats->tx_bytes;
1126 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1127
1128 stats->rx_packets += rx_packets;
1129 stats->tx_packets += tx_packets;
1130 stats->rx_bytes += rx_bytes;
1131 stats->tx_bytes += tx_bytes;
1132 }
1133
1134 return stats;
1135}
1136
Johannes Berg587e7292009-01-30 13:35:22 +01001137static const struct net_device_ops ieee80211_dataif_ops = {
1138 .ndo_open = ieee80211_open,
1139 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001140 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +01001141 .ndo_start_xmit = ieee80211_subif_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +00001142 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +01001143 .ndo_change_mtu = ieee80211_change_mtu,
Johannes Berg47846c92009-11-25 17:46:19 +01001144 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +01001145 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg5a490512015-04-22 17:10:38 +02001146 .ndo_get_stats64 = ieee80211_get_stats64,
Johannes Berg587e7292009-01-30 13:35:22 +01001147};
1148
Johannes Bergcf0277e2010-01-05 18:00:58 +01001149static u16 ieee80211_monitor_select_queue(struct net_device *dev,
Jason Wangf663dd92014-01-10 16:18:26 +08001150 struct sk_buff *skb,
Daniel Borkmann99932d42014-02-16 15:55:20 +01001151 void *accel_priv,
1152 select_queue_fallback_t fallback)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001153{
1154 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1155 struct ieee80211_local *local = sdata->local;
1156 struct ieee80211_hdr *hdr;
1157 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1158
Johannes Berg32c50572012-03-28 11:04:29 +02001159 if (local->hw.queues < IEEE80211_NUM_ACS)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001160 return 0;
1161
1162 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +01001163 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +01001164 return 0; /* doesn't matter, frame will be dropped */
1165
Johannes Bergb49bb572010-01-08 19:00:00 +01001166 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +01001167
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001168 return ieee80211_select_queue_80211(sdata, skb, hdr);
Johannes Bergcf0277e2010-01-05 18:00:58 +01001169}
1170
Johannes Berg587e7292009-01-30 13:35:22 +01001171static const struct net_device_ops ieee80211_monitorif_ops = {
1172 .ndo_open = ieee80211_open,
1173 .ndo_stop = ieee80211_stop,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001174 .ndo_uninit = ieee80211_uninit,
Johannes Berg587e7292009-01-30 13:35:22 +01001175 .ndo_start_xmit = ieee80211_monitor_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +00001176 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +01001177 .ndo_change_mtu = ieee80211_change_mtu,
Felix Fietkau31eba5b2013-05-28 13:01:53 +02001178 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +01001179 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg5a490512015-04-22 17:10:38 +02001180 .ndo_get_stats64 = ieee80211_get_stats64,
Johannes Berg587e7292009-01-30 13:35:22 +01001181};
1182
Johannes Berg5a490512015-04-22 17:10:38 +02001183static void ieee80211_if_free(struct net_device *dev)
1184{
1185 free_percpu(dev->tstats);
1186 free_netdev(dev);
1187}
1188
Johannes Berg587e7292009-01-30 13:35:22 +01001189static void ieee80211_if_setup(struct net_device *dev)
1190{
1191 ether_setup(dev);
Neil Horman550fd082011-07-26 06:05:38 +00001192 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Johannes Berg587e7292009-01-30 13:35:22 +01001193 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg5a490512015-04-22 17:10:38 +02001194 dev->destructor = ieee80211_if_free;
Johannes Berg587e7292009-01-30 13:35:22 +01001195}
1196
Johannes Berg1fa57d02010-06-10 10:21:32 +02001197static void ieee80211_iface_work(struct work_struct *work)
1198{
1199 struct ieee80211_sub_if_data *sdata =
1200 container_of(work, struct ieee80211_sub_if_data, work);
1201 struct ieee80211_local *local = sdata->local;
1202 struct sk_buff *skb;
Johannes Berg344eec62010-06-10 10:21:36 +02001203 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +02001204 struct ieee80211_ra_tid *ra_tid;
Michal Kazior08cf42e2014-07-16 12:12:15 +02001205 struct ieee80211_rx_agg *rx_agg;
Johannes Berg1fa57d02010-06-10 10:21:32 +02001206
1207 if (!ieee80211_sdata_running(sdata))
1208 return;
1209
Andrei Otcheretianskifc58c472015-08-15 22:04:01 +03001210 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
Johannes Berg1fa57d02010-06-10 10:21:32 +02001211 return;
1212
Emmanuel Grumbach4afaff12015-01-22 23:32:46 +02001213 if (!ieee80211_can_run_worker(local))
Johannes Berg1fa57d02010-06-10 10:21:32 +02001214 return;
1215
1216 /* first process frames */
1217 while ((skb = skb_dequeue(&sdata->skb_queue))) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001218 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1219
Johannes Bergc1475ca2010-06-10 10:21:37 +02001220 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1221 ra_tid = (void *)&skb->cb;
1222 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1223 ra_tid->tid);
1224 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1225 ra_tid = (void *)&skb->cb;
1226 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1227 ra_tid->tid);
Michal Kazior08cf42e2014-07-16 12:12:15 +02001228 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1229 rx_agg = (void *)&skb->cb;
1230 mutex_lock(&local->sta_mtx);
1231 sta = sta_info_get_bss(sdata, rx_agg->addr);
Michal Kazior4549cf22014-09-02 14:05:10 +02001232 if (sta)
Michal Kazior08cf42e2014-07-16 12:12:15 +02001233 __ieee80211_start_rx_ba_session(sta,
Michal Kazior4549cf22014-09-02 14:05:10 +02001234 0, 0, 0, 1, rx_agg->tid,
Michal Kazior08cf42e2014-07-16 12:12:15 +02001235 IEEE80211_MAX_AMPDU_BUF,
Michal Kazior4549cf22014-09-02 14:05:10 +02001236 false, true);
Michal Kazior08cf42e2014-07-16 12:12:15 +02001237 mutex_unlock(&local->sta_mtx);
1238 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1239 rx_agg = (void *)&skb->cb;
1240 mutex_lock(&local->sta_mtx);
1241 sta = sta_info_get_bss(sdata, rx_agg->addr);
1242 if (sta)
1243 __ieee80211_stop_rx_ba_session(sta,
1244 rx_agg->tid,
1245 WLAN_BACK_RECIPIENT, 0,
1246 false);
1247 mutex_unlock(&local->sta_mtx);
Johannes Bergc1475ca2010-06-10 10:21:37 +02001248 } else if (ieee80211_is_action(mgmt->frame_control) &&
1249 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001250 int len = skb->len;
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001251
Johannes Berga93e3642010-06-10 10:21:46 +02001252 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001253 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001254 if (sta) {
1255 switch (mgmt->u.action.u.addba_req.action_code) {
1256 case WLAN_ACTION_ADDBA_REQ:
1257 ieee80211_process_addba_request(
1258 local, sta, mgmt, len);
1259 break;
1260 case WLAN_ACTION_ADDBA_RESP:
1261 ieee80211_process_addba_resp(local, sta,
1262 mgmt, len);
1263 break;
1264 case WLAN_ACTION_DELBA:
1265 ieee80211_process_delba(sdata, sta,
1266 mgmt, len);
1267 break;
1268 default:
1269 WARN_ON(1);
1270 break;
1271 }
1272 }
Johannes Berga93e3642010-06-10 10:21:46 +02001273 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +02001274 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1275 struct ieee80211_hdr *hdr = (void *)mgmt;
1276 /*
1277 * So the frame isn't mgmt, but frame_control
1278 * is at the right place anyway, of course, so
1279 * the if statement is correct.
1280 *
1281 * Warn if we have other data frame types here,
1282 * they must not get here.
1283 */
1284 WARN_ON(hdr->frame_control &
1285 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1286 WARN_ON(!(hdr->seq_ctrl &
1287 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1288 /*
1289 * This was a fragment of a frame, received while
1290 * a block-ack session was active. That cannot be
1291 * right, so terminate the session.
1292 */
Johannes Berga93e3642010-06-10 10:21:46 +02001293 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +02001294 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +02001295 if (sta) {
1296 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1297 IEEE80211_QOS_CTL_TID_MASK;
1298
1299 __ieee80211_stop_rx_ba_session(
1300 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +02001301 WLAN_REASON_QSTA_REQUIRE_SETUP,
1302 true);
Johannes Berg344eec62010-06-10 10:21:36 +02001303 }
Johannes Berga93e3642010-06-10 10:21:46 +02001304 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02001305 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +02001306 case NL80211_IFTYPE_STATION:
1307 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1308 break;
1309 case NL80211_IFTYPE_ADHOC:
1310 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1311 break;
1312 case NL80211_IFTYPE_MESH_POINT:
1313 if (!ieee80211_vif_is_mesh(&sdata->vif))
1314 break;
1315 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1316 break;
1317 default:
1318 WARN(1, "frame for unexpected interface type");
Johannes Berg1fa57d02010-06-10 10:21:32 +02001319 break;
1320 }
Johannes Berg36b3a622010-06-10 10:21:33 +02001321
1322 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001323 }
1324
1325 /* then other type-dependent work */
1326 switch (sdata->vif.type) {
1327 case NL80211_IFTYPE_STATION:
1328 ieee80211_sta_work(sdata);
1329 break;
1330 case NL80211_IFTYPE_ADHOC:
1331 ieee80211_ibss_work(sdata);
1332 break;
1333 case NL80211_IFTYPE_MESH_POINT:
1334 if (!ieee80211_vif_is_mesh(&sdata->vif))
1335 break;
1336 ieee80211_mesh_work(sdata);
1337 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001338 case NL80211_IFTYPE_OCB:
1339 ieee80211_ocb_work(sdata);
1340 break;
Johannes Berg1fa57d02010-06-10 10:21:32 +02001341 default:
1342 break;
1343 }
1344}
1345
Johannes Berg04ecd252012-09-11 14:34:12 +02001346static void ieee80211_recalc_smps_work(struct work_struct *work)
1347{
1348 struct ieee80211_sub_if_data *sdata =
1349 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1350
1351 ieee80211_recalc_smps(sdata);
1352}
Johannes Berg1fa57d02010-06-10 10:21:32 +02001353
Johannes Berg75636522008-07-09 14:40:35 +02001354/*
1355 * Helper function to initialise an interface to a specific type.
1356 */
1357static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001358 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001359{
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001360 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1361 0xff, 0xff, 0xff};
1362
Johannes Berg75636522008-07-09 14:40:35 +02001363 /* clear type-dependent union */
1364 memset(&sdata->u, 0, sizeof(sdata->u));
1365
1366 /* and set some type-dependent values */
1367 sdata->vif.type = type;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001368 sdata->vif.p2p = false;
Johannes Berg60719ff2008-09-16 14:55:09 +02001369 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +02001370
Johannes Berga621fa42010-08-27 14:26:54 +03001371 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1372 sdata->control_port_no_encrypt = false;
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001373 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
Avraham Sternd3a58df2014-05-22 12:17:47 +03001374 sdata->vif.bss_conf.idle = true;
Johannes Berga621fa42010-08-27 14:26:54 +03001375
Simon Wunderlichb53be792011-11-18 14:20:44 +01001376 sdata->noack_map = 0;
1377
Johannes Bergf142c6b2012-06-18 20:07:15 +02001378 /* only monitor/p2p-device differ */
1379 if (sdata->dev) {
1380 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1381 sdata->dev->type = ARPHRD_ETHER;
1382 }
Johannes Berg75636522008-07-09 14:40:35 +02001383
Johannes Berg35f20c12010-06-10 10:21:30 +02001384 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +02001385 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg04ecd252012-09-11 14:34:12 +02001386 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02001387 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
Michal Kazior484298a2014-04-09 15:29:26 +02001388 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
Michal Kaziore3afb922014-04-09 15:29:27 +02001389 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
Johannes Berg35f20c12010-06-10 10:21:30 +02001390
Johannes Berg75636522008-07-09 14:40:35 +02001391 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001392 case NL80211_IFTYPE_P2P_GO:
1393 type = NL80211_IFTYPE_AP;
1394 sdata->vif.type = type;
1395 sdata->vif.p2p = true;
1396 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001397 case NL80211_IFTYPE_AP:
Marco Porschd012a602012-10-10 12:39:50 -07001398 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
Johannes Berg75636522008-07-09 14:40:35 +02001399 INIT_LIST_HEAD(&sdata->u.ap.vlans);
Emmanuel Grumbach687da132013-10-01 16:45:43 +03001400 INIT_WORK(&sdata->u.ap.request_smps_work,
1401 ieee80211_request_smps_ap_work);
Johannes Bergad2d2232012-12-14 14:34:25 +01001402 sdata->vif.bss_conf.bssid = sdata->vif.addr;
Emmanuel Grumbach687da132013-10-01 16:45:43 +03001403 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
Johannes Berg75636522008-07-09 14:40:35 +02001404 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001405 case NL80211_IFTYPE_P2P_CLIENT:
1406 type = NL80211_IFTYPE_STATION;
1407 sdata->vif.type = type;
1408 sdata->vif.p2p = true;
1409 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +02001410 case NL80211_IFTYPE_STATION:
Johannes Bergad2d2232012-12-14 14:34:25 +01001411 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001412 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +02001413 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001414 case NL80211_IFTYPE_OCB:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001415 sdata->vif.bss_conf.bssid = bssid_wildcard;
1416 ieee80211_ocb_setup_sdata(sdata);
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001417 break;
Johannes Berg46900292009-02-15 12:44:28 +01001418 case NL80211_IFTYPE_ADHOC:
Johannes Bergad2d2232012-12-14 14:34:25 +01001419 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
Johannes Berg46900292009-02-15 12:44:28 +01001420 ieee80211_ibss_setup_sdata(sdata);
1421 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001422 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +02001423 if (ieee80211_vif_is_mesh(&sdata->vif))
1424 ieee80211_mesh_init_sdata(sdata);
1425 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001426 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +02001427 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +01001428 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +02001429 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1430 MONITOR_FLAG_OTHER_BSS;
1431 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001432 case NL80211_IFTYPE_WDS:
Johannes Bergad2d2232012-12-14 14:34:25 +01001433 sdata->vif.bss_conf.bssid = NULL;
1434 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001435 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg98104fde2012-06-16 00:19:54 +02001436 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergad2d2232012-12-14 14:34:25 +01001437 sdata->vif.bss_conf.bssid = sdata->vif.addr;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001438 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001439 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001440 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +02001441 BUG();
1442 break;
1443 }
1444
1445 ieee80211_debugfs_add_netdev(sdata);
1446}
1447
Johannes Berg34d4bc42010-08-27 12:35:58 +02001448static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1449 enum nl80211_iftype type)
1450{
1451 struct ieee80211_local *local = sdata->local;
1452 int ret, err;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001453 enum nl80211_iftype internal_type = type;
1454 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001455
1456 ASSERT_RTNL();
1457
1458 if (!local->ops->change_interface)
1459 return -EBUSY;
1460
1461 switch (sdata->vif.type) {
1462 case NL80211_IFTYPE_AP:
1463 case NL80211_IFTYPE_STATION:
1464 case NL80211_IFTYPE_ADHOC:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001465 case NL80211_IFTYPE_OCB:
Johannes Berg34d4bc42010-08-27 12:35:58 +02001466 /*
1467 * Could maybe also all others here?
1468 * Just not sure how that interacts
1469 * with the RX/config path e.g. for
1470 * mesh.
1471 */
1472 break;
1473 default:
1474 return -EBUSY;
1475 }
1476
1477 switch (type) {
1478 case NL80211_IFTYPE_AP:
1479 case NL80211_IFTYPE_STATION:
1480 case NL80211_IFTYPE_ADHOC:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001481 case NL80211_IFTYPE_OCB:
Johannes Berg34d4bc42010-08-27 12:35:58 +02001482 /*
1483 * Could probably support everything
1484 * but WDS here (WDS do_open can fail
1485 * under memory pressure, which this
1486 * code isn't prepared to handle).
1487 */
1488 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001489 case NL80211_IFTYPE_P2P_CLIENT:
1490 p2p = true;
1491 internal_type = NL80211_IFTYPE_STATION;
1492 break;
1493 case NL80211_IFTYPE_P2P_GO:
1494 p2p = true;
1495 internal_type = NL80211_IFTYPE_AP;
1496 break;
Johannes Berg34d4bc42010-08-27 12:35:58 +02001497 default:
1498 return -EBUSY;
1499 }
1500
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001501 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001502 if (ret)
1503 return ret;
1504
1505 ieee80211_do_stop(sdata, false);
1506
Johannes Bergf142c6b2012-06-18 20:07:15 +02001507 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001508
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001509 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001510 if (ret)
Johannes Berga9865532013-08-26 09:30:32 +02001511 type = ieee80211_vif_type_p2p(&sdata->vif);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001512
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001513 /*
1514 * Ignore return value here, there's not much we can do since
1515 * the driver changed the interface type internally already.
1516 * The warnings will hopefully make driver authors fix it :-)
1517 */
Johannes Berga9865532013-08-26 09:30:32 +02001518 ieee80211_check_queues(sdata, type);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001519
Johannes Berg34d4bc42010-08-27 12:35:58 +02001520 ieee80211_setup_sdata(sdata, type);
1521
Johannes Bergf142c6b2012-06-18 20:07:15 +02001522 err = ieee80211_do_open(&sdata->wdev, false);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001523 WARN(err, "type change: do_open returned %d", err);
1524
1525 return ret;
1526}
1527
Johannes Bergf3947e22008-07-09 14:40:36 +02001528int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +02001529 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +02001530{
Johannes Berg34d4bc42010-08-27 12:35:58 +02001531 int ret;
1532
Johannes Bergf3947e22008-07-09 14:40:36 +02001533 ASSERT_RTNL();
1534
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001535 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +02001536 return 0;
1537
Johannes Berg34d4bc42010-08-27 12:35:58 +02001538 if (ieee80211_sdata_running(sdata)) {
1539 ret = ieee80211_runtime_change_iftype(sdata, type);
1540 if (ret)
1541 return ret;
1542 } else {
1543 /* Purge and reset type-dependent state. */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001544 ieee80211_teardown_sdata(sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +02001545 ieee80211_setup_sdata(sdata, type);
1546 }
Johannes Berg75636522008-07-09 14:40:35 +02001547
1548 /* reset some values that shouldn't be kept across type changes */
Johannes Berg9bc383d2009-11-19 11:55:19 +01001549 if (type == NL80211_IFTYPE_STATION)
1550 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001551
1552 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001553}
1554
Johannes Bergfa9029f2010-02-25 15:13:11 +01001555static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
Johannes Bergf142c6b2012-06-18 20:07:15 +02001556 u8 *perm_addr, enum nl80211_iftype type)
Johannes Bergfa9029f2010-02-25 15:13:11 +01001557{
1558 struct ieee80211_sub_if_data *sdata;
1559 u64 mask, start, addr, val, inc;
1560 u8 *m;
1561 u8 tmp_addr[ETH_ALEN];
1562 int i;
1563
1564 /* default ... something at least */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001565 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001566
1567 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1568 local->hw.wiphy->n_addresses <= 1)
1569 return;
1570
Johannes Bergfa9029f2010-02-25 15:13:11 +01001571 mutex_lock(&local->iflist_mtx);
1572
1573 switch (type) {
1574 case NL80211_IFTYPE_MONITOR:
1575 /* doesn't matter */
1576 break;
1577 case NL80211_IFTYPE_WDS:
1578 case NL80211_IFTYPE_AP_VLAN:
1579 /* match up with an AP interface */
1580 list_for_each_entry(sdata, &local->interfaces, list) {
1581 if (sdata->vif.type != NL80211_IFTYPE_AP)
1582 continue;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001583 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001584 break;
1585 }
1586 /* keep default if no AP interface present */
1587 break;
Johannes Berg6d711172012-06-19 17:19:44 +02001588 case NL80211_IFTYPE_P2P_CLIENT:
1589 case NL80211_IFTYPE_P2P_GO:
Johannes Berg30686bf2015-06-02 21:39:54 +02001590 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
Johannes Berg6d711172012-06-19 17:19:44 +02001591 list_for_each_entry(sdata, &local->interfaces, list) {
1592 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1593 continue;
1594 if (!ieee80211_sdata_running(sdata))
1595 continue;
1596 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1597 goto out_unlock;
1598 }
1599 }
1600 /* otherwise fall through */
Johannes Bergfa9029f2010-02-25 15:13:11 +01001601 default:
1602 /* assign a new address if possible -- try n_addresses first */
1603 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1604 bool used = false;
1605
1606 list_for_each_entry(sdata, &local->interfaces, list) {
dingtianhong496d7e82013-12-26 19:40:56 +08001607 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1608 sdata->vif.addr)) {
Johannes Bergfa9029f2010-02-25 15:13:11 +01001609 used = true;
1610 break;
1611 }
1612 }
1613
1614 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001615 memcpy(perm_addr,
Johannes Bergfa9029f2010-02-25 15:13:11 +01001616 local->hw.wiphy->addresses[i].addr,
1617 ETH_ALEN);
1618 break;
1619 }
1620 }
1621
1622 /* try mask if available */
1623 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1624 break;
1625
1626 m = local->hw.wiphy->addr_mask;
1627 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1628 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1629 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1630
1631 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1632 /* not a contiguous mask ... not handled now! */
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001633 pr_info("not contiguous\n");
Johannes Bergfa9029f2010-02-25 15:13:11 +01001634 break;
1635 }
1636
Helmut Schaaac209762013-05-27 10:43:09 +02001637 /*
1638 * Pick address of existing interface in case user changed
1639 * MAC address manually, default to perm_addr.
1640 */
Johannes Bergfa9029f2010-02-25 15:13:11 +01001641 m = local->hw.wiphy->perm_addr;
Helmut Schaaac209762013-05-27 10:43:09 +02001642 list_for_each_entry(sdata, &local->interfaces, list) {
1643 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1644 continue;
1645 m = sdata->vif.addr;
1646 break;
1647 }
Johannes Bergfa9029f2010-02-25 15:13:11 +01001648 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1649 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1650 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1651
1652 inc = 1ULL<<__ffs64(mask);
1653 val = (start & mask);
1654 addr = (start & ~mask) | (val & mask);
1655 do {
1656 bool used = false;
1657
1658 tmp_addr[5] = addr >> 0*8;
1659 tmp_addr[4] = addr >> 1*8;
1660 tmp_addr[3] = addr >> 2*8;
1661 tmp_addr[2] = addr >> 3*8;
1662 tmp_addr[1] = addr >> 4*8;
1663 tmp_addr[0] = addr >> 5*8;
1664
1665 val += inc;
1666
1667 list_for_each_entry(sdata, &local->interfaces, list) {
dingtianhong496d7e82013-12-26 19:40:56 +08001668 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
Johannes Bergfa9029f2010-02-25 15:13:11 +01001669 used = true;
1670 break;
1671 }
1672 }
1673
1674 if (!used) {
Johannes Bergf142c6b2012-06-18 20:07:15 +02001675 memcpy(perm_addr, tmp_addr, ETH_ALEN);
Johannes Bergfa9029f2010-02-25 15:13:11 +01001676 break;
1677 }
1678 addr = (start & ~mask) | (val & mask);
1679 } while (addr != start);
1680
1681 break;
1682 }
1683
Johannes Berg6d711172012-06-19 17:19:44 +02001684 out_unlock:
Johannes Bergfa9029f2010-02-25 15:13:11 +01001685 mutex_unlock(&local->iflist_mtx);
1686}
1687
Johannes Berg3e122be2008-07-09 14:40:34 +02001688int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Tom Gundersen6bab2e192015-03-18 11:13:39 +01001689 unsigned char name_assign_type,
Johannes Berg84efbb82012-06-16 00:00:26 +02001690 struct wireless_dev **new_wdev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001691 struct vif_params *params)
Jiri Bencf0706e82007-05-05 11:45:53 -07001692{
Johannes Bergf142c6b2012-06-18 20:07:15 +02001693 struct net_device *ndev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001694 struct ieee80211_sub_if_data *sdata = NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001695 struct txq_info *txqi;
Johannes Berg75636522008-07-09 14:40:35 +02001696 int ret, i;
Johannes Bergded81f62012-03-28 11:04:26 +02001697 int txqs = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001698
1699 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001700
Johannes Bergf142c6b2012-06-18 20:07:15 +02001701 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1702 struct wireless_dev *wdev;
Johannes Bergded81f62012-03-28 11:04:26 +02001703
Johannes Bergf142c6b2012-06-18 20:07:15 +02001704 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1705 GFP_KERNEL);
1706 if (!sdata)
1707 return -ENOMEM;
1708 wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001709
Johannes Bergf142c6b2012-06-18 20:07:15 +02001710 sdata->dev = NULL;
1711 strlcpy(sdata->name, name, IFNAMSIZ);
1712 ieee80211_assign_perm_addr(local, wdev->address, type);
1713 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1714 } else {
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001715 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1716 sizeof(void *));
1717 int txq_size = 0;
1718
1719 if (local->ops->wake_tx_queue)
1720 txq_size += sizeof(struct txq_info) +
1721 local->hw.txq_data_size;
1722
Johannes Bergf142c6b2012-06-18 20:07:15 +02001723 if (local->hw.queues >= IEEE80211_NUM_ACS)
1724 txqs = IEEE80211_NUM_ACS;
Johannes Bergf3994ec2008-05-12 20:51:44 -07001725
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001726 ndev = alloc_netdev_mqs(size + txq_size,
Tom Gundersen6bab2e192015-03-18 11:13:39 +01001727 name, name_assign_type,
Tom Gundersenc835a672014-07-14 16:37:24 +02001728 ieee80211_if_setup, txqs, 1);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001729 if (!ndev)
1730 return -ENOMEM;
1731 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Thadeu Lima de Souza Cascardo59e7e702011-06-02 17:28:37 -03001732
Johannes Berg5a490512015-04-22 17:10:38 +02001733 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1734 if (!ndev->tstats) {
1735 free_netdev(ndev);
1736 return -ENOMEM;
1737 }
1738
Johannes Bergf142c6b2012-06-18 20:07:15 +02001739 ndev->needed_headroom = local->tx_headroom +
1740 4*6 /* four MAC addresses */
1741 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1742 + 6 /* mesh */
1743 + 8 /* rfc1042/bridge tunnel */
1744 - ETH_HLEN /* ethernet hard_header_len */
1745 + IEEE80211_ENCRYPT_HEADROOM;
1746 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
Jiri Bencf0706e82007-05-05 11:45:53 -07001747
Johannes Bergf142c6b2012-06-18 20:07:15 +02001748 ret = dev_alloc_name(ndev, ndev->name);
1749 if (ret < 0) {
1750 free_netdev(ndev);
1751 return ret;
1752 }
1753
1754 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
Ben Greearb5dfae02014-10-22 12:23:06 -07001755 if (params && is_valid_ether_addr(params->macaddr))
1756 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1757 else
1758 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001759 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1760
1761 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1762 sdata = netdev_priv(ndev);
1763 ndev->ieee80211_ptr = &sdata->wdev;
1764 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1765 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1766
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001767 if (txq_size) {
1768 txqi = netdev_priv(ndev) + size;
1769 ieee80211_init_tx_queue(sdata, NULL, txqi, 0);
1770 }
1771
Johannes Bergf142c6b2012-06-18 20:07:15 +02001772 sdata->dev = ndev;
1773 }
Johannes Berg75636522008-07-09 14:40:35 +02001774
1775 /* initialise type-independent data */
Jiri Bencf0706e82007-05-05 11:45:53 -07001776 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e82007-05-05 11:45:53 -07001777 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +02001778
1779 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1780 skb_queue_head_init(&sdata->fragments[i].skb_list);
1781
1782 INIT_LIST_HEAD(&sdata->key_list);
1783
Simon Wunderlich164eb022013-02-08 18:16:20 +01001784 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1785 ieee80211_dfs_cac_timer_work);
Johannes Berg8d1f7ec2013-02-23 00:59:03 +01001786 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1787 ieee80211_delayed_tailroom_dec);
Johannes Berg97f97b12012-12-13 22:54:58 +01001788
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001789 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1790 struct ieee80211_supported_band *sband;
1791 sband = local->hw.wiphy->bands[i];
1792 sdata->rc_rateidx_mask[i] =
1793 sband ? (1 << sband->n_bitrates) - 1 : 0;
Lorenzo Bianconib119ad62015-08-06 23:47:33 +02001794 if (sband) {
1795 __le16 cap;
1796 u16 *vht_rate_mask;
1797
Simon Wunderlich19468412012-01-28 17:25:33 +01001798 memcpy(sdata->rc_rateidx_mcs_mask[i],
1799 sband->ht_cap.mcs.rx_mask,
1800 sizeof(sdata->rc_rateidx_mcs_mask[i]));
Lorenzo Bianconib119ad62015-08-06 23:47:33 +02001801
1802 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1803 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1804 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1805 } else {
Simon Wunderlich19468412012-01-28 17:25:33 +01001806 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1807 sizeof(sdata->rc_rateidx_mcs_mask[i]));
Lorenzo Bianconib119ad62015-08-06 23:47:33 +02001808 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1809 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1810 }
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001811 }
Johannes Berg75636522008-07-09 14:40:35 +02001812
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001813 ieee80211_set_default_queues(sdata);
1814
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001815 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1816 sdata->user_power_level = local->user_power_level;
1817
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001818 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1819
Johannes Berg75636522008-07-09 14:40:35 +02001820 /* setup type-dependent data */
1821 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001822
Johannes Bergf142c6b2012-06-18 20:07:15 +02001823 if (ndev) {
1824 if (params) {
1825 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1826 if (type == NL80211_IFTYPE_STATION)
1827 sdata->u.mgd.use_4addr = params->use_4addr;
1828 }
1829
1830 ndev->features |= local->hw.netdev_features;
1831
Johannes Bergb7ffbd72014-06-04 17:31:56 +02001832 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1833
Johannes Bergf142c6b2012-06-18 20:07:15 +02001834 ret = register_netdevice(ndev);
1835 if (ret) {
1836 free_netdev(ndev);
1837 return ret;
1838 }
Johannes Berg9bc383d2009-11-19 11:55:19 +01001839 }
1840
Johannes Bergc771c9d2009-01-23 22:54:03 +01001841 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001842 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001843 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001844
Johannes Berg84efbb82012-06-16 00:00:26 +02001845 if (new_wdev)
1846 *new_wdev = &sdata->wdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001847
Jiri Bencf0706e82007-05-05 11:45:53 -07001848 return 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001849}
1850
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001851void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001852{
Jiri Bencf0706e82007-05-05 11:45:53 -07001853 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001854
Johannes Bergc771c9d2009-01-23 22:54:03 +01001855 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001856 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001857 mutex_unlock(&sdata->local->iflist_mtx);
1858
Johannes Berg75636522008-07-09 14:40:35 +02001859 synchronize_rcu();
Johannes Bergf142c6b2012-06-18 20:07:15 +02001860
1861 if (sdata->dev) {
1862 unregister_netdevice(sdata->dev);
1863 } else {
1864 cfg80211_unregister_wdev(&sdata->wdev);
1865 kfree(sdata);
1866 }
1867}
1868
1869void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1870{
1871 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1872 return;
1873 ieee80211_do_stop(sdata, true);
1874 ieee80211_teardown_sdata(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001875}
1876
Johannes Berg75636522008-07-09 14:40:35 +02001877void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07001878{
Johannes Berg75636522008-07-09 14:40:35 +02001879 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001880 LIST_HEAD(unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001881 LIST_HEAD(wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001882
1883 ASSERT_RTNL();
1884
Johannes Bergd8d90082015-07-08 15:41:50 +03001885 /* Before destroying the interfaces, make sure they're all stopped so
1886 * that the hardware is stopped. Otherwise, the driver might still be
1887 * iterating the interfaces during the shutdown, e.g. from a worker
1888 * or from RX processing or similar, and if it does so (using atomic
1889 * iteration) while we're manipulating the list, the iteration will
1890 * crash.
1891 *
1892 * After this, the hardware should be stopped and the driver should
1893 * have stopped all of its activities, so that we can do RCU-unaware
1894 * manipulations of the interface list below.
Johannes Bergc8aa22d2013-05-24 01:06:09 +02001895 */
Johannes Bergd8d90082015-07-08 15:41:50 +03001896 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1897
1898 WARN(local->open_count, "%s: open count remains %d\n",
1899 wiphy_name(local->hw.wiphy), local->open_count);
Johannes Bergc8aa22d2013-05-24 01:06:09 +02001900
Eric Dumazetefe117a2009-11-05 11:06:40 +01001901 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001902 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1903 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001904
Johannes Bergf142c6b2012-06-18 20:07:15 +02001905 if (sdata->dev)
1906 unregister_netdevice_queue(sdata->dev, &unreg_list);
1907 else
1908 list_add(&sdata->list, &wdev_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001909 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001910 mutex_unlock(&local->iflist_mtx);
1911 unregister_netdevice_many(&unreg_list);
Johannes Bergf142c6b2012-06-18 20:07:15 +02001912
1913 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1914 list_del(&sdata->list);
1915 cfg80211_unregister_wdev(&sdata->wdev);
1916 kfree(sdata);
1917 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001918}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001919
Johannes Berg47846c92009-11-25 17:46:19 +01001920static int netdev_notify(struct notifier_block *nb,
Jiri Pirko351638e2013-05-28 01:30:21 +00001921 unsigned long state, void *ptr)
Johannes Berg47846c92009-11-25 17:46:19 +01001922{
Jiri Pirko351638e2013-05-28 01:30:21 +00001923 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Johannes Berg47846c92009-11-25 17:46:19 +01001924 struct ieee80211_sub_if_data *sdata;
1925
1926 if (state != NETDEV_CHANGENAME)
Zhao, Gang8bd811a2014-04-21 12:53:05 +08001927 return NOTIFY_DONE;
Johannes Berg47846c92009-11-25 17:46:19 +01001928
1929 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
Zhao, Gang8bd811a2014-04-21 12:53:05 +08001930 return NOTIFY_DONE;
Johannes Berg47846c92009-11-25 17:46:19 +01001931
1932 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
Zhao, Gang8bd811a2014-04-21 12:53:05 +08001933 return NOTIFY_DONE;
Johannes Berg47846c92009-11-25 17:46:19 +01001934
1935 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg2f5265e2010-02-12 10:45:05 +01001936 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001937 ieee80211_debugfs_rename_netdev(sdata);
Zhao, Gang8bd811a2014-04-21 12:53:05 +08001938
1939 return NOTIFY_OK;
Johannes Berg47846c92009-11-25 17:46:19 +01001940}
1941
1942static struct notifier_block mac80211_netdev_notifier = {
1943 .notifier_call = netdev_notify,
1944};
1945
1946int ieee80211_iface_init(void)
1947{
1948 return register_netdevice_notifier(&mac80211_netdev_notifier);
1949}
1950
1951void ieee80211_iface_exit(void)
1952{
1953 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1954}