blob: c20051b7ffcd8518e6dd8e01c042b3fbf6981677 [file] [log] [blame]
Jiri Bencf0706e822007-05-05 11:45:53 -07001/*
Johannes Berg0d143fe2008-09-11 00:01:59 +02002 * Interface handling (except master interface)
3 *
Jiri Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 11:45:53 -070028
Johannes Bergc771c9d2009-01-23 22:54:03 +010029/**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
45
Johannes Berg0d143fe2008-09-11 00:01:59 +020046static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
47{
48 int meshhdrlen;
49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
50
51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
52
53 /* FIX: what would be proper limits for MTU?
54 * This interface uses 802.3 frames. */
55 if (new_mtu < 256 ||
56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
57 return -EINVAL;
58 }
59
60#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
62#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
63 dev->mtu = new_mtu;
64 return 0;
65}
66
Johannes Berg47846c92009-11-25 17:46:19 +010067static int ieee80211_change_mac(struct net_device *dev, void *addr)
68{
69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Kalle Valofc5f7572009-12-30 15:54:03 +020070 struct sockaddr *sa = addr;
Johannes Berg47846c92009-11-25 17:46:19 +010071 int ret;
72
Johannes Berg9607e6b2009-12-23 13:15:31 +010073 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +010074 return -EBUSY;
75
Kalle Valofc5f7572009-12-30 15:54:03 +020076 ret = eth_mac_addr(dev, sa);
Johannes Berg47846c92009-11-25 17:46:19 +010077
78 if (ret == 0)
Kalle Valofc5f7572009-12-30 15:54:03 +020079 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +010080
81 return ret;
82}
83
Johannes Berg0d143fe2008-09-11 00:01:59 +020084static inline int identical_mac_addr_allowed(int type1, int type2)
85{
86 return type1 == NL80211_IFTYPE_MONITOR ||
87 type2 == NL80211_IFTYPE_MONITOR ||
88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
89 (type1 == NL80211_IFTYPE_WDS &&
90 (type2 == NL80211_IFTYPE_WDS ||
91 type2 == NL80211_IFTYPE_AP)) ||
92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
93 (type1 == NL80211_IFTYPE_AP_VLAN &&
94 (type2 == NL80211_IFTYPE_AP ||
95 type2 == NL80211_IFTYPE_AP_VLAN));
96}
97
Johannes Berg87490f62010-08-27 12:35:57 +020098static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
99 enum nl80211_iftype iftype)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200100{
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200101 struct ieee80211_local *local = sdata->local;
Johannes Berg87490f62010-08-27 12:35:57 +0200102 struct ieee80211_sub_if_data *nsdata;
103 struct net_device *dev = sdata->dev;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200104
Johannes Berg87490f62010-08-27 12:35:57 +0200105 ASSERT_RTNL();
Johannes Berg0d143fe2008-09-11 00:01:59 +0200106
107 /* we hold the RTNL here so can safely walk the list */
108 list_for_each_entry(nsdata, &local->interfaces, list) {
109 struct net_device *ndev = nsdata->dev;
110
Johannes Berg9607e6b2009-12-23 13:15:31 +0100111 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
Johannes Berg0d143fe2008-09-11 00:01:59 +0200112 /*
113 * Allow only a single IBSS interface to be up at any
114 * time. This is restricted because beacon distribution
115 * cannot work properly if both are in the same IBSS.
116 *
117 * To remove this restriction we'd have to disallow them
118 * from setting the same SSID on different IBSS interfaces
119 * belonging to the same hardware. Then, however, we're
120 * faced with having to adopt two different TSF timers...
121 */
Johannes Berg87490f62010-08-27 12:35:57 +0200122 if (iftype == NL80211_IFTYPE_ADHOC &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200123 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
124 return -EBUSY;
125
126 /*
127 * The remaining checks are only performed for interfaces
128 * with the same MAC address.
129 */
130 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
131 continue;
132
133 /*
134 * check whether it may have the same address
135 */
Johannes Berg87490f62010-08-27 12:35:57 +0200136 if (!identical_mac_addr_allowed(iftype,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200137 nsdata->vif.type))
138 return -ENOTUNIQ;
139
140 /*
141 * can only add VLANs to enabled APs
142 */
Johannes Berg87490f62010-08-27 12:35:57 +0200143 if (iftype == NL80211_IFTYPE_AP_VLAN &&
Johannes Berg0d143fe2008-09-11 00:01:59 +0200144 nsdata->vif.type == NL80211_IFTYPE_AP)
145 sdata->bss = &nsdata->u.ap;
146 }
147 }
148
Johannes Berg87490f62010-08-27 12:35:57 +0200149 return 0;
150}
151
Christian Lamparter85416a42010-10-02 13:17:07 +0200152void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
153 const int offset)
154{
155 struct ieee80211_local *local = sdata->local;
156 u32 flags = sdata->u.mntr_flags;
157
158#define ADJUST(_f, _s) do { \
159 if (flags & MONITOR_FLAG_##_f) \
160 local->fif_##_s += offset; \
161 } while (0)
162
163 ADJUST(FCSFAIL, fcsfail);
164 ADJUST(PLCPFAIL, plcpfail);
165 ADJUST(CONTROL, control);
166 ADJUST(CONTROL, pspoll);
167 ADJUST(OTHER_BSS, other_bss);
168
169#undef ADJUST
170}
171
Johannes Berg34d4bc42010-08-27 12:35:58 +0200172/*
173 * NOTE: Be very careful when changing this function, it must NOT return
174 * an error on interface type changes that have been pre-checked, so most
175 * checks should be in ieee80211_check_concurrent_iface.
176 */
177static int ieee80211_do_open(struct net_device *dev, bool coming_up)
Johannes Berg87490f62010-08-27 12:35:57 +0200178{
179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
180 struct ieee80211_local *local = sdata->local;
181 struct sta_info *sta;
182 u32 changed = 0;
183 int res;
184 u32 hw_reconf_flags = 0;
185
Johannes Berg0d143fe2008-09-11 00:01:59 +0200186 switch (sdata->vif.type) {
187 case NL80211_IFTYPE_WDS:
188 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
189 return -ENOLINK;
190 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100191 case NL80211_IFTYPE_AP_VLAN: {
192 struct ieee80211_sub_if_data *master;
193
Johannes Berg0d143fe2008-09-11 00:01:59 +0200194 if (!sdata->bss)
195 return -ENOLINK;
Johannes Berg665c93a2011-11-04 11:18:11 +0100196
Johannes Berg0d143fe2008-09-11 00:01:59 +0200197 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
Johannes Berg665c93a2011-11-04 11:18:11 +0100198
199 master = container_of(sdata->bss,
200 struct ieee80211_sub_if_data, u.ap);
201 sdata->control_port_protocol =
202 master->control_port_protocol;
203 sdata->control_port_no_encrypt =
204 master->control_port_no_encrypt;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200205 break;
Johannes Berg665c93a2011-11-04 11:18:11 +0100206 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200207 case NL80211_IFTYPE_AP:
208 sdata->bss = &sdata->u.ap;
209 break;
210 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200211 case NL80211_IFTYPE_STATION:
212 case NL80211_IFTYPE_MONITOR:
213 case NL80211_IFTYPE_ADHOC:
214 /* no special treatment */
215 break;
216 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200217 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200218 case NL80211_IFTYPE_P2P_CLIENT:
219 case NL80211_IFTYPE_P2P_GO:
Johannes Berg0d143fe2008-09-11 00:01:59 +0200220 /* cannot happen */
221 WARN_ON(1);
222 break;
223 }
224
225 if (local->open_count == 0) {
Johannes Berg24487982009-04-23 18:52:52 +0200226 res = drv_start(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200227 if (res)
228 goto err_del_bss;
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400229 if (local->ops->napi_poll)
230 napi_enable(&local->napi);
Johannes Berge8975582008-10-09 12:18:51 +0200231 /* we're brought up, everything changes */
232 hw_reconf_flags = ~0;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200233 ieee80211_led_radio(local, true);
Johannes Berg67408c82010-11-30 08:59:23 +0100234 ieee80211_mod_tpt_led_trig(local,
235 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200236 }
237
238 /*
Johannes Bergbf533e02010-08-27 12:35:56 +0200239 * Copy the hopefully now-present MAC address to
240 * this interface, if it has the special null one.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200241 */
Johannes Bergbf533e02010-08-27 12:35:56 +0200242 if (is_zero_ether_addr(dev->dev_addr)) {
243 memcpy(dev->dev_addr,
244 local->hw.wiphy->perm_addr,
245 ETH_ALEN);
246 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200247
Johannes Bergbf533e02010-08-27 12:35:56 +0200248 if (!is_valid_ether_addr(dev->dev_addr)) {
249 if (!local->open_count)
250 drv_stop(local);
251 return -EADDRNOTAVAIL;
John W. Linville0adc23f2009-10-06 16:27:18 -0400252 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200253 }
254
Johannes Berg0d143fe2008-09-11 00:01:59 +0200255 switch (sdata->vif.type) {
256 case NL80211_IFTYPE_AP_VLAN:
257 /* no need to tell driver */
258 break;
259 case NL80211_IFTYPE_MONITOR:
260 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
261 local->cooked_mntrs++;
262 break;
263 }
264
265 /* must be before the call to ieee80211_configure_filter */
266 local->monitors++;
Johannes Berge8975582008-10-09 12:18:51 +0200267 if (local->monitors == 1) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100268 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
269 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200270 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200271
Christian Lamparter85416a42010-10-02 13:17:07 +0200272 ieee80211_adjust_monitor_flags(sdata, 1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200273 ieee80211_configure_filter(local);
David Gnedt53e9b1d2010-07-19 20:44:02 +0200274
275 netif_carrier_on(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200276 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200277 default:
Johannes Berg34d4bc42010-08-27 12:35:58 +0200278 if (coming_up) {
Johannes Berg7b7eab62011-11-03 14:41:13 +0100279 res = drv_add_interface(local, sdata);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200280 if (res)
281 goto err_stop;
282 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200283
Johannes Berg29cbe682010-12-03 09:20:44 +0100284 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400285 local->fif_pspoll++;
Johannes Berg7be50862010-10-13 12:06:24 +0200286 local->fif_probe_req++;
Igor Perminove3b90ca2009-08-04 16:48:51 +0400287
Igor Perminove3b90ca2009-08-04 16:48:51 +0400288 ieee80211_configure_filter(local);
Johannes Berg7be50862010-10-13 12:06:24 +0200289 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
290 local->fif_probe_req++;
Andrey Yurovskya3c9aa52008-10-31 14:50:12 -0700291 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400292
Johannes Berg0d143fe2008-09-11 00:01:59 +0200293 changed |= ieee80211_reset_erp_info(sdata);
294 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200295
Eliad Peller86a2ea42011-11-08 15:36:59 +0200296 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
297 sdata->vif.type == NL80211_IFTYPE_ADHOC)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200298 netif_carrier_off(dev);
299 else
300 netif_carrier_on(dev);
Eliad Peller59034592011-10-16 10:57:31 +0200301
302 /*
303 * set default queue parameters so drivers don't
304 * need to initialise the hardware if the hardware
305 * doesn't start up with sane defaults
306 */
Johannes Berg3abead52012-03-02 15:56:59 +0100307 ieee80211_set_wmm_default(sdata, true);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200308 }
309
Johannes Berg2d2080c2010-09-15 15:13:13 +0200310 set_bit(SDATA_STATE_RUNNING, &sdata->state);
311
Johannes Berg0d143fe2008-09-11 00:01:59 +0200312 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
313 /* Create STA entry for the WDS peer */
314 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
315 GFP_KERNEL);
316 if (!sta) {
317 res = -ENOMEM;
318 goto err_del_interface;
319 }
320
Johannes Berg83d5cc02012-01-12 09:31:10 +0100321 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
322 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
323 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200324
325 res = sta_info_insert(sta);
326 if (res) {
327 /* STA has been freed */
328 goto err_del_interface;
329 }
Bill Jordan1be7fe82010-10-01 11:20:41 -0400330
331 rate_control_rate_init(sta);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200332 }
333
Johannes Berg0d143fe2008-09-11 00:01:59 +0200334 /*
335 * set_multicast_list will be invoked by the networking core
336 * which will check whether any increments here were done in
337 * error and sync them down to the hardware as filter flags.
338 */
339 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
340 atomic_inc(&local->iff_allmultis);
341
342 if (sdata->flags & IEEE80211_SDATA_PROMISC)
343 atomic_inc(&local->iff_promiscs);
344
Johannes Berg7da7cc12010-08-05 17:02:38 +0200345 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200346 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200347 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200348
Johannes Berg34d4bc42010-08-27 12:35:58 +0200349 if (coming_up)
350 local->open_count++;
351
Eliad Peller59034592011-10-16 10:57:31 +0200352 if (hw_reconf_flags)
Johannes Berge8975582008-10-09 12:18:51 +0200353 ieee80211_hw_config(local, hw_reconf_flags);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200354
Johannes Berg10f644a2009-04-16 13:17:25 +0200355 ieee80211_recalc_ps(local, -1);
Johannes Berg965beda2009-04-16 13:17:24 +0200356
John W. Linville8a5b33f2010-01-06 15:39:39 -0500357 netif_tx_start_all_queues(dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200358
359 return 0;
360 err_del_interface:
Johannes Berg7b7eab62011-11-03 14:41:13 +0100361 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200362 err_stop:
Johannes Berg24487982009-04-23 18:52:52 +0200363 if (!local->open_count)
364 drv_stop(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200365 err_del_bss:
366 sdata->bss = NULL;
367 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
368 list_del(&sdata->u.vlan.list);
Johannes Berg2d2080c2010-09-15 15:13:13 +0200369 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200370 return res;
371}
372
Johannes Berg34d4bc42010-08-27 12:35:58 +0200373static int ieee80211_open(struct net_device *dev)
Johannes Berg0d143fe2008-09-11 00:01:59 +0200374{
375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200376 int err;
377
378 /* fail early if user set an invalid address */
Mohammed Shafi Shajakhan2fcf2822011-07-12 15:19:04 +0530379 if (!is_valid_ether_addr(dev->dev_addr))
Johannes Berg34d4bc42010-08-27 12:35:58 +0200380 return -EADDRNOTAVAIL;
381
382 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
383 if (err)
384 return err;
385
386 return ieee80211_do_open(dev, true);
387}
388
389static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
390 bool going_down)
391{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200392 struct ieee80211_local *local = sdata->local;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200393 unsigned long flags;
394 struct sk_buff *skb, *tmp;
Johannes Berge8975582008-10-09 12:18:51 +0200395 u32 hw_reconf_flags = 0;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200396 int i;
Ben Greear2cf22b82011-01-31 11:30:09 -0800397 enum nl80211_channel_type orig_ct;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200398
Rajkumar Manoharanc29acf22011-05-14 09:43:28 +0530399 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
400
Brian Cavagnolo352ffad2010-11-04 16:59:28 -0700401 if (local->scan_sdata == sdata)
402 ieee80211_scan_cancel(local);
403
Johannes Berg0d143fe2008-09-11 00:01:59 +0200404 /*
405 * Stop TX on this interface first.
406 */
Johannes Berg34d4bc42010-08-27 12:35:58 +0200407 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200408
409 /*
Johannes Bergaf6b6372009-12-23 13:15:35 +0100410 * Purge work for this interface.
411 */
412 ieee80211_work_purge(sdata);
413
414 /*
Johannes Berg0d143fe2008-09-11 00:01:59 +0200415 * Remove all stations associated with this interface.
416 *
417 * This must be done before calling ops->remove_interface()
418 * because otherwise we can later invoke ops->sta_notify()
419 * whenever the STAs are removed, and that invalidates driver
420 * assumptions about always getting a vif pointer that is valid
421 * (because if we remove a STA after ops->remove_interface()
422 * the driver will have removed the vif info already!)
423 *
Johannes Bergb9dcf712010-08-27 12:35:54 +0200424 * This is relevant only in AP, WDS and mesh modes, since in
425 * all other modes we've already removed all stations when
426 * disconnecting etc.
Johannes Berg0d143fe2008-09-11 00:01:59 +0200427 */
428 sta_info_flush(local, sdata);
429
430 /*
431 * Don't count this interface for promisc/allmulti while it
432 * is down. dev_mc_unsync() will invoke set_multicast_list
433 * on the master interface which will sync these down to the
434 * hardware as filter flags.
435 */
436 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
437 atomic_dec(&local->iff_allmultis);
438
439 if (sdata->flags & IEEE80211_SDATA_PROMISC)
440 atomic_dec(&local->iff_promiscs);
441
Johannes Berg7be50862010-10-13 12:06:24 +0200442 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Igor Perminove3b90ca2009-08-04 16:48:51 +0400443 local->fif_pspoll--;
Johannes Berg7be50862010-10-13 12:06:24 +0200444 local->fif_probe_req--;
445 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
446 local->fif_probe_req--;
447 }
Igor Perminove3b90ca2009-08-04 16:48:51 +0400448
Johannes Berg34d4bc42010-08-27 12:35:58 +0200449 netif_addr_lock_bh(sdata->dev);
Johannes Berg3b8d81e2009-06-17 17:43:56 +0200450 spin_lock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200451 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
452 sdata->dev->addr_len);
Johannes Berg3b8d81e2009-06-17 17:43:56 +0200453 spin_unlock_bh(&local->filter_lock);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200454 netif_addr_unlock_bh(sdata->dev);
Johannes Berg3b8d81e2009-06-17 17:43:56 +0200455
Johannes Berg3ac64be2009-08-17 16:16:53 +0200456 ieee80211_configure_filter(local);
457
Vivek Natarajan7cbf0ba2008-12-24 00:34:37 -0800458 del_timer_sync(&local->dynamic_ps_timer);
459 cancel_work_sync(&local->dynamic_ps_enable_work);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200460
461 /* APs need special treatment */
462 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg57c9fff2009-07-29 15:46:21 +0200463 struct ieee80211_sub_if_data *vlan, *tmpsdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200464 struct beacon_data *old_beacon =
465 rtnl_dereference(sdata->u.ap.beacon);
Arik Nemtsov02945822011-11-10 11:28:57 +0200466 struct sk_buff *old_probe_resp =
467 rtnl_dereference(sdata->u.ap.probe_resp);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200468
Johannes Bergb9dcf712010-08-27 12:35:54 +0200469 /* sdata_running will return false, so this will disable */
470 ieee80211_bss_info_change_notify(sdata,
471 BSS_CHANGED_BEACON_ENABLED);
472
Arik Nemtsov02945822011-11-10 11:28:57 +0200473 /* remove beacon and probe response */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +0000474 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
Arik Nemtsov02945822011-11-10 11:28:57 +0200475 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200476 synchronize_rcu();
477 kfree(old_beacon);
Dan Carpenter5e2e05d2011-11-15 09:33:09 +0300478 kfree_skb(old_probe_resp);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200479
480 /* down all dependent devices, that is VLANs */
Johannes Berg57c9fff2009-07-29 15:46:21 +0200481 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
Johannes Berg0d143fe2008-09-11 00:01:59 +0200482 u.vlan.list)
483 dev_close(vlan->dev);
484 WARN_ON(!list_empty(&sdata->u.ap.vlans));
Johannes Berg6f2d9332011-09-20 17:40:51 +0200485
486 /* free all potentially still buffered bcast frames */
487 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
488 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
Eliad Pellerafa762f2012-04-23 14:45:15 +0300489 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
490 ieee80211_mgd_stop(sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200491 }
492
Johannes Berg34d4bc42010-08-27 12:35:58 +0200493 if (going_down)
494 local->open_count--;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200495
496 switch (sdata->vif.type) {
497 case NL80211_IFTYPE_AP_VLAN:
498 list_del(&sdata->u.vlan.list);
499 /* no need to tell driver */
500 break;
501 case NL80211_IFTYPE_MONITOR:
502 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
503 local->cooked_mntrs--;
504 break;
505 }
506
507 local->monitors--;
Johannes Berge8975582008-10-09 12:18:51 +0200508 if (local->monitors == 0) {
Johannes Berg0869aea2009-10-28 10:03:35 +0100509 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
510 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
Johannes Berge8975582008-10-09 12:18:51 +0200511 }
Johannes Berg0d143fe2008-09-11 00:01:59 +0200512
Christian Lamparter85416a42010-10-02 13:17:07 +0200513 ieee80211_adjust_monitor_flags(sdata, -1);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200514 ieee80211_configure_filter(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200515 break;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200516 default:
Johannes Bergc1475ca2010-06-10 10:21:37 +0200517 flush_work(&sdata->work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200518 /*
519 * When we get here, the interface is marked down.
520 * Call synchronize_rcu() to wait for the RX path
521 * should it be using the interface and enqueuing
522 * frames at this very time on another CPU.
523 */
524 synchronize_rcu();
525 skb_queue_purge(&sdata->skb_queue);
526
Bob Copeland97af7432009-07-29 10:13:03 +0200527 /*
Johannes Bergb9dcf712010-08-27 12:35:54 +0200528 * Disable beaconing here for mesh only, AP and IBSS
529 * are already taken care of.
Bob Copeland97af7432009-07-29 10:13:03 +0200530 */
Johannes Bergb9dcf712010-08-27 12:35:54 +0200531 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Bob Copeland97af7432009-07-29 10:13:03 +0200532 ieee80211_bss_info_change_notify(sdata,
533 BSS_CHANGED_BEACON_ENABLED);
Bob Copeland97af7432009-07-29 10:13:03 +0200534
Johannes Bergb9dcf712010-08-27 12:35:54 +0200535 /*
536 * Free all remaining keys, there shouldn't be any,
537 * except maybe group keys in AP more or WDS?
538 */
Johannes Bergad0e2b52010-06-01 10:19:19 +0200539 ieee80211_free_keys(sdata);
Johannes Bergb9dcf712010-08-27 12:35:54 +0200540
Johannes Berg34d4bc42010-08-27 12:35:58 +0200541 if (going_down)
Johannes Berg7b7eab62011-11-03 14:41:13 +0100542 drv_remove_interface(local, sdata);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200543 }
544
545 sdata->bss = NULL;
546
Johannes Berg7da7cc12010-08-05 17:02:38 +0200547 mutex_lock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200548 hw_reconf_flags |= __ieee80211_recalc_idle(local);
Johannes Berg7da7cc12010-08-05 17:02:38 +0200549 mutex_unlock(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +0200550
551 ieee80211_recalc_ps(local, -1);
552
Johannes Berg0d143fe2008-09-11 00:01:59 +0200553 if (local->open_count == 0) {
John W. Linville4e6cbfd2010-07-29 16:14:13 -0400554 if (local->ops->napi_poll)
555 napi_disable(&local->napi);
Johannes Bergea77f122009-08-21 14:44:45 +0200556 ieee80211_clear_tx_pending(local);
Johannes Berg84f6a012009-08-20 20:02:20 +0200557 ieee80211_stop_device(local);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200558
Johannes Berge8975582008-10-09 12:18:51 +0200559 /* no reconfiguring after stop! */
560 hw_reconf_flags = 0;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200561 }
562
Ben Greear2cf22b82011-01-31 11:30:09 -0800563 /* Re-calculate channel-type, in case there are multiple vifs
564 * on different channel types.
565 */
566 orig_ct = local->_oper_channel_type;
567 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
568
Johannes Berge8975582008-10-09 12:18:51 +0200569 /* do after stop to avoid reconfiguring when we stop anyway */
Ben Greear2cf22b82011-01-31 11:30:09 -0800570 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
Johannes Berge8975582008-10-09 12:18:51 +0200571 ieee80211_hw_config(local, hw_reconf_flags);
572
Johannes Berg5061b0c2009-07-14 00:33:34 +0200573 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
574 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
575 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
576 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
577 if (info->control.vif == &sdata->vif) {
578 __skb_unlink(skb, &local->pending[i]);
579 dev_kfree_skb_irq(skb);
580 }
581 }
582 }
583 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200584}
585
586static int ieee80211_stop(struct net_device *dev)
587{
588 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
589
590 ieee80211_do_stop(sdata, true);
Johannes Berg5061b0c2009-07-14 00:33:34 +0200591
Johannes Berg0d143fe2008-09-11 00:01:59 +0200592 return 0;
593}
594
595static void ieee80211_set_multicast_list(struct net_device *dev)
596{
Johannes Berg0d143fe2008-09-11 00:01:59 +0200597 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb4a4bf52008-09-26 13:34:54 +0200598 struct ieee80211_local *local = sdata->local;
Johannes Berg0d143fe2008-09-11 00:01:59 +0200599 int allmulti, promisc, sdata_allmulti, sdata_promisc;
600
601 allmulti = !!(dev->flags & IFF_ALLMULTI);
602 promisc = !!(dev->flags & IFF_PROMISC);
603 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
604 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
605
606 if (allmulti != sdata_allmulti) {
607 if (dev->flags & IFF_ALLMULTI)
608 atomic_inc(&local->iff_allmultis);
609 else
610 atomic_dec(&local->iff_allmultis);
611 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
612 }
613
614 if (promisc != sdata_promisc) {
615 if (dev->flags & IFF_PROMISC)
616 atomic_inc(&local->iff_promiscs);
617 else
618 atomic_dec(&local->iff_promiscs);
619 sdata->flags ^= IEEE80211_SDATA_PROMISC;
620 }
Johannes Berg3b8d81e2009-06-17 17:43:56 +0200621 spin_lock_bh(&local->filter_lock);
Jiri Pirko22bedad2010-04-01 21:22:57 +0000622 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
Johannes Berg3b8d81e2009-06-17 17:43:56 +0200623 spin_unlock_bh(&local->filter_lock);
Johannes Berg3ac64be2009-08-17 16:16:53 +0200624 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
Johannes Berg0d143fe2008-09-11 00:01:59 +0200625}
626
Johannes Berg75636522008-07-09 14:40:35 +0200627/*
628 * Called when the netdev is removed or, by the code below, before
629 * the interface type changes.
630 */
631static void ieee80211_teardown_sdata(struct net_device *dev)
Jiri Bencf0706e822007-05-05 11:45:53 -0700632{
Johannes Berg75636522008-07-09 14:40:35 +0200633 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
634 struct ieee80211_local *local = sdata->local;
Johannes Berg75636522008-07-09 14:40:35 +0200635 int flushed;
Jiri Bencf0706e822007-05-05 11:45:53 -0700636 int i;
637
Johannes Berg75636522008-07-09 14:40:35 +0200638 /* free extra data */
639 ieee80211_free_keys(sdata);
Jiri Bencf0706e822007-05-05 11:45:53 -0700640
Jouni Malinenaee14ce2008-09-09 16:33:15 +0200641 ieee80211_debugfs_remove_netdev(sdata);
642
Johannes Berg988c0f72008-04-17 19:21:22 +0200643 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
Jiri Bencf0706e822007-05-05 11:45:53 -0700644 __skb_queue_purge(&sdata->fragments[i].skb_list);
Johannes Berg75636522008-07-09 14:40:35 +0200645 sdata->fragment_next = 0;
646
Johannes Bergb9dcf712010-08-27 12:35:54 +0200647 if (ieee80211_vif_is_mesh(&sdata->vif))
648 mesh_rmc_free(sdata);
Johannes Berg75636522008-07-09 14:40:35 +0200649
650 flushed = sta_info_flush(local, sdata);
651 WARN_ON(flushed);
Jiri Bencf0706e822007-05-05 11:45:53 -0700652}
653
Johannes Bergcf0277e2010-01-05 18:00:58 +0100654static u16 ieee80211_netdev_select_queue(struct net_device *dev,
655 struct sk_buff *skb)
656{
657 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
658}
659
Johannes Berg587e7292009-01-30 13:35:22 +0100660static const struct net_device_ops ieee80211_dataif_ops = {
661 .ndo_open = ieee80211_open,
662 .ndo_stop = ieee80211_stop,
663 .ndo_uninit = ieee80211_teardown_sdata,
664 .ndo_start_xmit = ieee80211_subif_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000665 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +0100666 .ndo_change_mtu = ieee80211_change_mtu,
Johannes Berg47846c92009-11-25 17:46:19 +0100667 .ndo_set_mac_address = ieee80211_change_mac,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100668 .ndo_select_queue = ieee80211_netdev_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100669};
670
Johannes Bergcf0277e2010-01-05 18:00:58 +0100671static u16 ieee80211_monitor_select_queue(struct net_device *dev,
672 struct sk_buff *skb)
673{
674 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
675 struct ieee80211_local *local = sdata->local;
676 struct ieee80211_hdr *hdr;
677 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
678
679 if (local->hw.queues < 4)
680 return 0;
681
682 if (skb->len < 4 ||
Johannes Bergb49bb572010-01-08 19:00:00 +0100683 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
Johannes Bergcf0277e2010-01-05 18:00:58 +0100684 return 0; /* doesn't matter, frame will be dropped */
685
Johannes Bergb49bb572010-01-08 19:00:00 +0100686 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
Johannes Bergcf0277e2010-01-05 18:00:58 +0100687
Thomas Pedersend3c15972011-11-24 17:15:23 -0800688 return ieee80211_select_queue_80211(local, skb, hdr);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100689}
690
Johannes Berg587e7292009-01-30 13:35:22 +0100691static const struct net_device_ops ieee80211_monitorif_ops = {
692 .ndo_open = ieee80211_open,
693 .ndo_stop = ieee80211_stop,
694 .ndo_uninit = ieee80211_teardown_sdata,
695 .ndo_start_xmit = ieee80211_monitor_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000696 .ndo_set_rx_mode = ieee80211_set_multicast_list,
Johannes Berg587e7292009-01-30 13:35:22 +0100697 .ndo_change_mtu = ieee80211_change_mtu,
698 .ndo_set_mac_address = eth_mac_addr,
Johannes Bergcf0277e2010-01-05 18:00:58 +0100699 .ndo_select_queue = ieee80211_monitor_select_queue,
Johannes Berg587e7292009-01-30 13:35:22 +0100700};
701
702static void ieee80211_if_setup(struct net_device *dev)
703{
704 ether_setup(dev);
Neil Horman550fd082011-07-26 06:05:38 +0000705 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Johannes Berg587e7292009-01-30 13:35:22 +0100706 dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg587e7292009-01-30 13:35:22 +0100707 dev->destructor = free_netdev;
708}
709
Johannes Berg1fa57d02010-06-10 10:21:32 +0200710static void ieee80211_iface_work(struct work_struct *work)
711{
712 struct ieee80211_sub_if_data *sdata =
713 container_of(work, struct ieee80211_sub_if_data, work);
714 struct ieee80211_local *local = sdata->local;
715 struct sk_buff *skb;
Johannes Berg344eec62010-06-10 10:21:36 +0200716 struct sta_info *sta;
Johannes Bergc1475ca2010-06-10 10:21:37 +0200717 struct ieee80211_ra_tid *ra_tid;
Johannes Berg1fa57d02010-06-10 10:21:32 +0200718
719 if (!ieee80211_sdata_running(sdata))
720 return;
721
722 if (local->scanning)
723 return;
724
725 /*
726 * ieee80211_queue_work() should have picked up most cases,
727 * here we'll pick the rest.
728 */
729 if (WARN(local->suspended,
730 "interface work scheduled while going to suspend\n"))
731 return;
732
733 /* first process frames */
734 while ((skb = skb_dequeue(&sdata->skb_queue))) {
Johannes Bergbed7ee62010-06-10 10:21:35 +0200735 struct ieee80211_mgmt *mgmt = (void *)skb->data;
736
Johannes Bergc1475ca2010-06-10 10:21:37 +0200737 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
738 ra_tid = (void *)&skb->cb;
739 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
740 ra_tid->tid);
741 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
742 ra_tid = (void *)&skb->cb;
743 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
744 ra_tid->tid);
745 } else if (ieee80211_is_action(mgmt->frame_control) &&
746 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
Johannes Bergbed7ee62010-06-10 10:21:35 +0200747 int len = skb->len;
Johannes Bergbed7ee62010-06-10 10:21:35 +0200748
Johannes Berga93e3642010-06-10 10:21:46 +0200749 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200750 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Bergbed7ee62010-06-10 10:21:35 +0200751 if (sta) {
752 switch (mgmt->u.action.u.addba_req.action_code) {
753 case WLAN_ACTION_ADDBA_REQ:
754 ieee80211_process_addba_request(
755 local, sta, mgmt, len);
756 break;
757 case WLAN_ACTION_ADDBA_RESP:
758 ieee80211_process_addba_resp(local, sta,
759 mgmt, len);
760 break;
761 case WLAN_ACTION_DELBA:
762 ieee80211_process_delba(sdata, sta,
763 mgmt, len);
764 break;
765 default:
766 WARN_ON(1);
767 break;
768 }
769 }
Johannes Berga93e3642010-06-10 10:21:46 +0200770 mutex_unlock(&local->sta_mtx);
Johannes Berg344eec62010-06-10 10:21:36 +0200771 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
772 struct ieee80211_hdr *hdr = (void *)mgmt;
773 /*
774 * So the frame isn't mgmt, but frame_control
775 * is at the right place anyway, of course, so
776 * the if statement is correct.
777 *
778 * Warn if we have other data frame types here,
779 * they must not get here.
780 */
781 WARN_ON(hdr->frame_control &
782 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
783 WARN_ON(!(hdr->seq_ctrl &
784 cpu_to_le16(IEEE80211_SCTL_FRAG)));
785 /*
786 * This was a fragment of a frame, received while
787 * a block-ack session was active. That cannot be
788 * right, so terminate the session.
789 */
Johannes Berga93e3642010-06-10 10:21:46 +0200790 mutex_lock(&local->sta_mtx);
Felix Fietkau875ae5f2010-07-17 15:59:07 +0200791 sta = sta_info_get_bss(sdata, mgmt->sa);
Johannes Berg344eec62010-06-10 10:21:36 +0200792 if (sta) {
793 u16 tid = *ieee80211_get_qos_ctl(hdr) &
794 IEEE80211_QOS_CTL_TID_MASK;
795
796 __ieee80211_stop_rx_ba_session(
797 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +0200798 WLAN_REASON_QSTA_REQUIRE_SETUP,
799 true);
Johannes Berg344eec62010-06-10 10:21:36 +0200800 }
Johannes Berga93e3642010-06-10 10:21:46 +0200801 mutex_unlock(&local->sta_mtx);
Johannes Bergbed7ee62010-06-10 10:21:35 +0200802 } else switch (sdata->vif.type) {
Johannes Berg1fa57d02010-06-10 10:21:32 +0200803 case NL80211_IFTYPE_STATION:
804 ieee80211_sta_rx_queued_mgmt(sdata, skb);
805 break;
806 case NL80211_IFTYPE_ADHOC:
807 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
808 break;
809 case NL80211_IFTYPE_MESH_POINT:
810 if (!ieee80211_vif_is_mesh(&sdata->vif))
811 break;
812 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
813 break;
814 default:
815 WARN(1, "frame for unexpected interface type");
Johannes Berg1fa57d02010-06-10 10:21:32 +0200816 break;
817 }
Johannes Berg36b3a622010-06-10 10:21:33 +0200818
819 kfree_skb(skb);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200820 }
821
822 /* then other type-dependent work */
823 switch (sdata->vif.type) {
824 case NL80211_IFTYPE_STATION:
825 ieee80211_sta_work(sdata);
826 break;
827 case NL80211_IFTYPE_ADHOC:
828 ieee80211_ibss_work(sdata);
829 break;
830 case NL80211_IFTYPE_MESH_POINT:
831 if (!ieee80211_vif_is_mesh(&sdata->vif))
832 break;
833 ieee80211_mesh_work(sdata);
834 break;
835 default:
836 break;
837 }
838}
839
840
Johannes Berg75636522008-07-09 14:40:35 +0200841/*
842 * Helper function to initialise an interface to a specific type.
843 */
844static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200845 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200846{
Johannes Berg75636522008-07-09 14:40:35 +0200847 /* clear type-dependent union */
848 memset(&sdata->u, 0, sizeof(sdata->u));
849
850 /* and set some type-dependent values */
851 sdata->vif.type = type;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200852 sdata->vif.p2p = false;
Johannes Berg587e7292009-01-30 13:35:22 +0100853 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
Johannes Berg60719ff2008-09-16 14:55:09 +0200854 sdata->wdev.iftype = type;
Johannes Berg75636522008-07-09 14:40:35 +0200855
Johannes Berga621fa42010-08-27 14:26:54 +0300856 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
857 sdata->control_port_no_encrypt = false;
858
Simon Wunderlichb53be792011-11-18 14:20:44 +0100859 sdata->noack_map = 0;
860
Johannes Berg75636522008-07-09 14:40:35 +0200861 /* only monitor differs */
862 sdata->dev->type = ARPHRD_ETHER;
863
Johannes Berg35f20c12010-06-10 10:21:30 +0200864 skb_queue_head_init(&sdata->skb_queue);
Johannes Berg1fa57d02010-06-10 10:21:32 +0200865 INIT_WORK(&sdata->work, ieee80211_iface_work);
Johannes Berg35f20c12010-06-10 10:21:30 +0200866
Johannes Berg75636522008-07-09 14:40:35 +0200867 switch (type) {
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200868 case NL80211_IFTYPE_P2P_GO:
869 type = NL80211_IFTYPE_AP;
870 sdata->vif.type = type;
871 sdata->vif.p2p = true;
872 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200873 case NL80211_IFTYPE_AP:
Johannes Berg75636522008-07-09 14:40:35 +0200874 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
875 INIT_LIST_HEAD(&sdata->u.ap.vlans);
876 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200877 case NL80211_IFTYPE_P2P_CLIENT:
878 type = NL80211_IFTYPE_STATION;
879 sdata->vif.type = type;
880 sdata->vif.p2p = true;
881 /* fall through */
Johannes Berg05c914f2008-09-11 00:01:58 +0200882 case NL80211_IFTYPE_STATION:
Johannes Berg9c6bd792008-09-11 00:01:52 +0200883 ieee80211_sta_setup_sdata(sdata);
Johannes Berg472dbc42008-09-11 00:01:49 +0200884 break;
Johannes Berg46900292009-02-15 12:44:28 +0100885 case NL80211_IFTYPE_ADHOC:
886 ieee80211_ibss_setup_sdata(sdata);
887 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200888 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg75636522008-07-09 14:40:35 +0200889 if (ieee80211_vif_is_mesh(&sdata->vif))
890 ieee80211_mesh_init_sdata(sdata);
891 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200892 case NL80211_IFTYPE_MONITOR:
Johannes Berg75636522008-07-09 14:40:35 +0200893 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg587e7292009-01-30 13:35:22 +0100894 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
Johannes Berg75636522008-07-09 14:40:35 +0200895 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
896 MONITOR_FLAG_OTHER_BSS;
897 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200898 case NL80211_IFTYPE_WDS:
899 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg75636522008-07-09 14:40:35 +0200900 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200901 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +0200902 case NUM_NL80211_IFTYPES:
Johannes Berg75636522008-07-09 14:40:35 +0200903 BUG();
904 break;
905 }
906
907 ieee80211_debugfs_add_netdev(sdata);
908}
909
Johannes Berg34d4bc42010-08-27 12:35:58 +0200910static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
911 enum nl80211_iftype type)
912{
913 struct ieee80211_local *local = sdata->local;
914 int ret, err;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200915 enum nl80211_iftype internal_type = type;
916 bool p2p = false;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200917
918 ASSERT_RTNL();
919
920 if (!local->ops->change_interface)
921 return -EBUSY;
922
923 switch (sdata->vif.type) {
924 case NL80211_IFTYPE_AP:
925 case NL80211_IFTYPE_STATION:
926 case NL80211_IFTYPE_ADHOC:
927 /*
928 * Could maybe also all others here?
929 * Just not sure how that interacts
930 * with the RX/config path e.g. for
931 * mesh.
932 */
933 break;
934 default:
935 return -EBUSY;
936 }
937
938 switch (type) {
939 case NL80211_IFTYPE_AP:
940 case NL80211_IFTYPE_STATION:
941 case NL80211_IFTYPE_ADHOC:
942 /*
943 * Could probably support everything
944 * but WDS here (WDS do_open can fail
945 * under memory pressure, which this
946 * code isn't prepared to handle).
947 */
948 break;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200949 case NL80211_IFTYPE_P2P_CLIENT:
950 p2p = true;
951 internal_type = NL80211_IFTYPE_STATION;
952 break;
953 case NL80211_IFTYPE_P2P_GO:
954 p2p = true;
955 internal_type = NL80211_IFTYPE_AP;
956 break;
Johannes Berg34d4bc42010-08-27 12:35:58 +0200957 default:
958 return -EBUSY;
959 }
960
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200961 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200962 if (ret)
963 return ret;
964
965 ieee80211_do_stop(sdata, false);
966
967 ieee80211_teardown_sdata(sdata->dev);
968
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200969 ret = drv_change_interface(local, sdata, internal_type, p2p);
Johannes Berg34d4bc42010-08-27 12:35:58 +0200970 if (ret)
971 type = sdata->vif.type;
972
973 ieee80211_setup_sdata(sdata, type);
974
975 err = ieee80211_do_open(sdata->dev, false);
976 WARN(err, "type change: do_open returned %d", err);
977
978 return ret;
979}
980
Johannes Bergf3947e22008-07-09 14:40:36 +0200981int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
Johannes Berg05c914f2008-09-11 00:01:58 +0200982 enum nl80211_iftype type)
Johannes Berg75636522008-07-09 14:40:35 +0200983{
Johannes Berg34d4bc42010-08-27 12:35:58 +0200984 int ret;
985
Johannes Bergf3947e22008-07-09 14:40:36 +0200986 ASSERT_RTNL();
987
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200988 if (type == ieee80211_vif_type_p2p(&sdata->vif))
Johannes Bergf3947e22008-07-09 14:40:36 +0200989 return 0;
990
Johannes Berge60c7742008-11-26 23:31:40 +0100991 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
Pavel Roskindcebf452008-12-22 16:39:36 -0500992 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
993 type == NL80211_IFTYPE_ADHOC)
Johannes Berge60c7742008-11-26 23:31:40 +0100994 return -EOPNOTSUPP;
995
Johannes Berg34d4bc42010-08-27 12:35:58 +0200996 if (ieee80211_sdata_running(sdata)) {
997 ret = ieee80211_runtime_change_iftype(sdata, type);
998 if (ret)
999 return ret;
1000 } else {
1001 /* Purge and reset type-dependent state. */
1002 ieee80211_teardown_sdata(sdata->dev);
1003 ieee80211_setup_sdata(sdata, type);
1004 }
Johannes Berg75636522008-07-09 14:40:35 +02001005
1006 /* reset some values that shouldn't be kept across type changes */
Johannes Bergbda39332008-10-11 01:51:51 +02001007 sdata->vif.bss_conf.basic_rates =
Johannes Berg96dd22a2008-09-11 00:01:57 +02001008 ieee80211_mandatory_rates(sdata->local,
1009 sdata->local->hw.conf.channel->band);
Johannes Berg75636522008-07-09 14:40:35 +02001010 sdata->drop_unencrypted = 0;
Johannes Berg9bc383d2009-11-19 11:55:19 +01001011 if (type == NL80211_IFTYPE_STATION)
1012 sdata->u.mgd.use_4addr = false;
Johannes Bergf3947e22008-07-09 14:40:36 +02001013
1014 return 0;
Johannes Berg75636522008-07-09 14:40:35 +02001015}
1016
Johannes Bergfa9029f2010-02-25 15:13:11 +01001017static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1018 struct net_device *dev,
1019 enum nl80211_iftype type)
1020{
1021 struct ieee80211_sub_if_data *sdata;
1022 u64 mask, start, addr, val, inc;
1023 u8 *m;
1024 u8 tmp_addr[ETH_ALEN];
1025 int i;
1026
1027 /* default ... something at least */
1028 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1029
1030 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1031 local->hw.wiphy->n_addresses <= 1)
1032 return;
1033
1034
1035 mutex_lock(&local->iflist_mtx);
1036
1037 switch (type) {
1038 case NL80211_IFTYPE_MONITOR:
1039 /* doesn't matter */
1040 break;
1041 case NL80211_IFTYPE_WDS:
1042 case NL80211_IFTYPE_AP_VLAN:
1043 /* match up with an AP interface */
1044 list_for_each_entry(sdata, &local->interfaces, list) {
1045 if (sdata->vif.type != NL80211_IFTYPE_AP)
1046 continue;
1047 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1048 break;
1049 }
1050 /* keep default if no AP interface present */
1051 break;
1052 default:
1053 /* assign a new address if possible -- try n_addresses first */
1054 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1055 bool used = false;
1056
1057 list_for_each_entry(sdata, &local->interfaces, list) {
1058 if (memcmp(local->hw.wiphy->addresses[i].addr,
1059 sdata->vif.addr, ETH_ALEN) == 0) {
1060 used = true;
1061 break;
1062 }
1063 }
1064
1065 if (!used) {
1066 memcpy(dev->perm_addr,
1067 local->hw.wiphy->addresses[i].addr,
1068 ETH_ALEN);
1069 break;
1070 }
1071 }
1072
1073 /* try mask if available */
1074 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1075 break;
1076
1077 m = local->hw.wiphy->addr_mask;
1078 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1079 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1080 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1081
1082 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1083 /* not a contiguous mask ... not handled now! */
1084 printk(KERN_DEBUG "not contiguous\n");
1085 break;
1086 }
1087
1088 m = local->hw.wiphy->perm_addr;
1089 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1090 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1091 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1092
1093 inc = 1ULL<<__ffs64(mask);
1094 val = (start & mask);
1095 addr = (start & ~mask) | (val & mask);
1096 do {
1097 bool used = false;
1098
1099 tmp_addr[5] = addr >> 0*8;
1100 tmp_addr[4] = addr >> 1*8;
1101 tmp_addr[3] = addr >> 2*8;
1102 tmp_addr[2] = addr >> 3*8;
1103 tmp_addr[1] = addr >> 4*8;
1104 tmp_addr[0] = addr >> 5*8;
1105
1106 val += inc;
1107
1108 list_for_each_entry(sdata, &local->interfaces, list) {
1109 if (memcmp(tmp_addr, sdata->vif.addr,
1110 ETH_ALEN) == 0) {
1111 used = true;
1112 break;
1113 }
1114 }
1115
1116 if (!used) {
1117 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1118 break;
1119 }
1120 addr = (start & ~mask) | (val & mask);
1121 } while (addr != start);
1122
1123 break;
1124 }
1125
1126 mutex_unlock(&local->iflist_mtx);
1127}
1128
Johannes Berg3e122be2008-07-09 14:40:34 +02001129int ieee80211_if_add(struct ieee80211_local *local, const char *name,
Johannes Berg05c914f2008-09-11 00:01:58 +02001130 struct net_device **new_dev, enum nl80211_iftype type,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001131 struct vif_params *params)
Jiri Bencf0706e822007-05-05 11:45:53 -07001132{
1133 struct net_device *ndev;
Jiri Bencf0706e822007-05-05 11:45:53 -07001134 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg75636522008-07-09 14:40:35 +02001135 int ret, i;
Jiri Bencf0706e822007-05-05 11:45:53 -07001136
1137 ASSERT_RTNL();
Johannes Berg75636522008-07-09 14:40:35 +02001138
Johannes Berg55d99052011-07-09 15:39:16 +02001139 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1140 name, ieee80211_if_setup, local->hw.queues, 1);
Jiri Bencf0706e822007-05-05 11:45:53 -07001141 if (!ndev)
1142 return -ENOMEM;
Johannes Berga272a722009-07-14 00:33:36 +02001143 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
Jiri Bencf0706e822007-05-05 11:45:53 -07001144
Johannes Bergf3994ec2008-05-12 20:51:44 -07001145 ndev->needed_headroom = local->tx_headroom +
1146 4*6 /* four MAC addresses */
1147 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1148 + 6 /* mesh */
1149 + 8 /* rfc1042/bridge tunnel */
1150 - ETH_HLEN /* ethernet hard_header_len */
1151 + IEEE80211_ENCRYPT_HEADROOM;
1152 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1153
Thadeu Lima de Souza Cascardo59e7e702011-06-02 17:28:37 -03001154 ret = dev_alloc_name(ndev, ndev->name);
1155 if (ret < 0)
1156 goto fail;
1157
Johannes Bergfa9029f2010-02-25 15:13:11 +01001158 ieee80211_assign_perm_addr(local, ndev, type);
1159 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
Jiri Bencf0706e822007-05-05 11:45:53 -07001160 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1161
Johannes Berg3e122be2008-07-09 14:40:34 +02001162 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1163 sdata = netdev_priv(ndev);
Jiri Bencf0706e822007-05-05 11:45:53 -07001164 ndev->ieee80211_ptr = &sdata->wdev;
Johannes Berg47846c92009-11-25 17:46:19 +01001165 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1166 memcpy(sdata->name, ndev->name, IFNAMSIZ);
Johannes Berg75636522008-07-09 14:40:35 +02001167
1168 /* initialise type-independent data */
Jiri Bencf0706e822007-05-05 11:45:53 -07001169 sdata->wdev.wiphy = local->hw.wiphy;
Jiri Bencf0706e822007-05-05 11:45:53 -07001170 sdata->local = local;
Johannes Berg75636522008-07-09 14:40:35 +02001171 sdata->dev = ndev;
Juuso Oikarinen68542962010-06-09 13:43:26 +03001172#ifdef CONFIG_INET
1173 sdata->arp_filter_state = true;
1174#endif
Johannes Berg75636522008-07-09 14:40:35 +02001175
1176 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1177 skb_queue_head_init(&sdata->fragments[i].skb_list);
1178
1179 INIT_LIST_HEAD(&sdata->key_list);
1180
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001181 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1182 struct ieee80211_supported_band *sband;
1183 sband = local->hw.wiphy->bands[i];
1184 sdata->rc_rateidx_mask[i] =
1185 sband ? (1 << sband->n_bitrates) - 1 : 0;
Simon Wunderlich19468412012-01-28 17:25:33 +01001186 if (sband)
1187 memcpy(sdata->rc_rateidx_mcs_mask[i],
1188 sband->ht_cap.mcs.rx_mask,
1189 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1190 else
1191 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1192 sizeof(sdata->rc_rateidx_mcs_mask[i]));
Jouni Malinen37eb0b12010-01-06 13:09:08 +02001193 }
Johannes Berg75636522008-07-09 14:40:35 +02001194
1195 /* setup type-dependent data */
1196 ieee80211_setup_sdata(sdata, type);
Jiri Bencf0706e822007-05-05 11:45:53 -07001197
Johannes Berg9bc383d2009-11-19 11:55:19 +01001198 if (params) {
1199 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1200 if (type == NL80211_IFTYPE_STATION)
1201 sdata->u.mgd.use_4addr = params->use_4addr;
1202 }
1203
Jiri Bencf0706e822007-05-05 11:45:53 -07001204 ret = register_netdevice(ndev);
1205 if (ret)
1206 goto fail;
1207
Johannes Bergc771c9d2009-01-23 22:54:03 +01001208 mutex_lock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001209 list_add_tail_rcu(&sdata->list, &local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001210 mutex_unlock(&local->iflist_mtx);
Johannes Berg79010422007-09-18 17:29:21 -04001211
Jiri Bencf0706e822007-05-05 11:45:53 -07001212 if (new_dev)
1213 *new_dev = ndev;
Jiri Bencf0706e822007-05-05 11:45:53 -07001214
Jiri Bencf0706e822007-05-05 11:45:53 -07001215 return 0;
1216
Johannes Berg75636522008-07-09 14:40:35 +02001217 fail:
Jiri Bencf0706e822007-05-05 11:45:53 -07001218 free_netdev(ndev);
1219 return ret;
1220}
1221
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001222void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e822007-05-05 11:45:53 -07001223{
Jiri Bencf0706e822007-05-05 11:45:53 -07001224 ASSERT_RTNL();
Johannes Berg11a843b2007-08-28 17:01:55 -04001225
Johannes Bergc771c9d2009-01-23 22:54:03 +01001226 mutex_lock(&sdata->local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001227 list_del_rcu(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001228 mutex_unlock(&sdata->local->iflist_mtx);
1229
Javier Cardonaece1a2e2011-08-29 13:23:04 -07001230 if (ieee80211_vif_is_mesh(&sdata->vif))
1231 mesh_path_flush_by_iface(sdata);
1232
Johannes Berg75636522008-07-09 14:40:35 +02001233 synchronize_rcu();
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001234 unregister_netdevice(sdata->dev);
Jiri Bencf0706e822007-05-05 11:45:53 -07001235}
1236
Johannes Berg75636522008-07-09 14:40:35 +02001237/*
1238 * Remove all interfaces, may only be called at hardware unregistration
1239 * time because it doesn't do RCU-safe list removals.
1240 */
1241void ieee80211_remove_interfaces(struct ieee80211_local *local)
Jiri Bencf0706e822007-05-05 11:45:53 -07001242{
Johannes Berg75636522008-07-09 14:40:35 +02001243 struct ieee80211_sub_if_data *sdata, *tmp;
Eric Dumazetefe117a2009-11-05 11:06:40 +01001244 LIST_HEAD(unreg_list);
Jiri Bencf0706e822007-05-05 11:45:53 -07001245
1246 ASSERT_RTNL();
1247
Eric Dumazetefe117a2009-11-05 11:06:40 +01001248 mutex_lock(&local->iflist_mtx);
Johannes Berg75636522008-07-09 14:40:35 +02001249 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1250 list_del(&sdata->list);
Johannes Bergc771c9d2009-01-23 22:54:03 +01001251
Javier Cardonaece1a2e2011-08-29 13:23:04 -07001252 if (ieee80211_vif_is_mesh(&sdata->vif))
1253 mesh_path_flush_by_iface(sdata);
1254
Eric Dumazetefe117a2009-11-05 11:06:40 +01001255 unregister_netdevice_queue(sdata->dev, &unreg_list);
Jiri Bencf0706e822007-05-05 11:45:53 -07001256 }
Eric Dumazetefe117a2009-11-05 11:06:40 +01001257 mutex_unlock(&local->iflist_mtx);
1258 unregister_netdevice_many(&unreg_list);
Eric W. Biederman5f04d502011-02-20 11:49:45 -08001259 list_del(&unreg_list);
Jiri Bencf0706e822007-05-05 11:45:53 -07001260}
Johannes Berg5cff20e2009-04-29 12:26:17 +02001261
1262static u32 ieee80211_idle_off(struct ieee80211_local *local,
1263 const char *reason)
1264{
1265 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1266 return 0;
1267
1268#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001269 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001270#endif
1271
1272 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1273 return IEEE80211_CONF_CHANGE_IDLE;
1274}
1275
1276static u32 ieee80211_idle_on(struct ieee80211_local *local)
1277{
1278 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1279 return 0;
1280
1281#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001282 wiphy_debug(local->hw.wiphy, "device now idle\n");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001283#endif
1284
Johannes Berga80f7c02009-12-23 13:15:32 +01001285 drv_flush(local, false);
1286
Johannes Berg5cff20e2009-04-29 12:26:17 +02001287 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1288 return IEEE80211_CONF_CHANGE_IDLE;
1289}
1290
1291u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1292{
1293 struct ieee80211_sub_if_data *sdata;
1294 int count = 0;
Johannes Berg21f83582010-12-18 17:20:47 +01001295 bool working = false, scanning = false, hw_roc = false;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001296 struct ieee80211_work *wk;
Johannes Berg67408c82010-11-30 08:59:23 +01001297 unsigned int led_trig_start = 0, led_trig_stop = 0;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001298
Johannes Berg7da7cc12010-08-05 17:02:38 +02001299#ifdef CONFIG_PROVE_LOCKING
1300 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1301 !lockdep_is_held(&local->iflist_mtx));
1302#endif
1303 lockdep_assert_held(&local->mtx);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001304
1305 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg7da7cc12010-08-05 17:02:38 +02001306 if (!ieee80211_sdata_running(sdata)) {
1307 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001308 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001309 }
1310
1311 sdata->old_idle = sdata->vif.bss_conf.idle;
1312
Johannes Berg5cff20e2009-04-29 12:26:17 +02001313 /* do not count disabled managed interfaces */
1314 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
Johannes Berg66e67e42012-01-20 13:55:27 +01001315 !sdata->u.mgd.associated &&
1316 !sdata->u.mgd.auth_data &&
1317 !sdata->u.mgd.assoc_data) {
Johannes Berg7da7cc12010-08-05 17:02:38 +02001318 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001319 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001320 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001321 /* do not count unused IBSS interfaces */
1322 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Berg7da7cc12010-08-05 17:02:38 +02001323 !sdata->u.ibss.ssid_len) {
1324 sdata->vif.bss_conf.idle = true;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001325 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001326 }
Johannes Berg5cff20e2009-04-29 12:26:17 +02001327 /* count everything else */
Eliad Peller405385f2012-01-11 13:11:50 +02001328 sdata->vif.bss_conf.idle = false;
Johannes Berg5cff20e2009-04-29 12:26:17 +02001329 count++;
1330 }
1331
Johannes Berg7da7cc12010-08-05 17:02:38 +02001332 list_for_each_entry(wk, &local->work_list, list) {
1333 working = true;
1334 wk->sdata->vif.bss_conf.idle = false;
1335 }
1336
Eliad Peller885bd8e2012-02-02 17:44:55 +02001337 if (local->scan_sdata &&
1338 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
Johannes Berg7da7cc12010-08-05 17:02:38 +02001339 scanning = true;
1340 local->scan_sdata->vif.bss_conf.idle = false;
1341 }
1342
Johannes Berg21f83582010-12-18 17:20:47 +01001343 if (local->hw_roc_channel)
1344 hw_roc = true;
1345
Johannes Berg7da7cc12010-08-05 17:02:38 +02001346 list_for_each_entry(sdata, &local->interfaces, list) {
Mohammed Shafi Shajakhan0dee0062012-02-20 14:44:01 +05301347 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1348 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1349 continue;
Johannes Berg7da7cc12010-08-05 17:02:38 +02001350 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1351 continue;
1352 if (!ieee80211_sdata_running(sdata))
1353 continue;
1354 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1355 }
1356
Johannes Berg21f83582010-12-18 17:20:47 +01001357 if (working || scanning || hw_roc)
Johannes Berg67408c82010-11-30 08:59:23 +01001358 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1359 else
1360 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1361
1362 if (count)
1363 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1364 else
1365 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1366
1367 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1368
Johannes Berg21f83582010-12-18 17:20:47 +01001369 if (hw_roc)
1370 return ieee80211_idle_off(local, "hw remain-on-channel");
Johannes Berg7da7cc12010-08-05 17:02:38 +02001371 if (working)
1372 return ieee80211_idle_off(local, "working");
1373 if (scanning)
1374 return ieee80211_idle_off(local, "scanning");
Johannes Berg5cff20e2009-04-29 12:26:17 +02001375 if (!count)
1376 return ieee80211_idle_on(local);
1377 else
1378 return ieee80211_idle_off(local, "in use");
1379
1380 return 0;
1381}
1382
1383void ieee80211_recalc_idle(struct ieee80211_local *local)
1384{
1385 u32 chg;
1386
1387 mutex_lock(&local->iflist_mtx);
1388 chg = __ieee80211_recalc_idle(local);
1389 mutex_unlock(&local->iflist_mtx);
Johannes Berg58905ca2009-05-07 14:23:01 +02001390 if (chg)
1391 ieee80211_hw_config(local, chg);
Johannes Berg5cff20e2009-04-29 12:26:17 +02001392}
Johannes Berg47846c92009-11-25 17:46:19 +01001393
1394static int netdev_notify(struct notifier_block *nb,
1395 unsigned long state,
1396 void *ndev)
1397{
1398 struct net_device *dev = ndev;
1399 struct ieee80211_sub_if_data *sdata;
1400
1401 if (state != NETDEV_CHANGENAME)
1402 return 0;
1403
1404 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1405 return 0;
1406
1407 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1408 return 0;
1409
1410 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1411
Johannes Berg2f5265e2010-02-12 10:45:05 +01001412 memcpy(sdata->name, dev->name, IFNAMSIZ);
Johannes Berg47846c92009-11-25 17:46:19 +01001413
1414 ieee80211_debugfs_rename_netdev(sdata);
1415 return 0;
1416}
1417
1418static struct notifier_block mac80211_netdev_notifier = {
1419 .notifier_call = netdev_notify,
1420};
1421
1422int ieee80211_iface_init(void)
1423{
1424 return register_netdevice_notifier(&mac80211_netdev_notifier);
1425}
1426
1427void ieee80211_iface_exit(void)
1428{
1429 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1430}