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mac80211: remove a few set but unused variables
[deliverable/linux.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
0d143fe1
JB		 2 * Interface handling (except master interface)
3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
f0706e82
JB		 8 *
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 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#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>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
1be7fe8d 27#include "rate.h"
0d143fe1 28
c771c9d8
JB		 29/**
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
1ea6f9c0
JB		 45bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
46{
47 struct ieee80211_chanctx_conf *chanctx_conf;
48 int power;
49
50 rcu_read_lock();
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
52 if (!chanctx_conf) {
53 rcu_read_unlock();
54 return false;
55 }
56
4bf88530 57 power = chanctx_conf->def.chan->max_power;
1ea6f9c0
JB		 58 rcu_read_unlock();
59
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
62
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
65
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
69 return true;
70 }
71
72 return false;
73}
74
75void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
76{
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
79}
c771c9d8 80
fd0f979a 81static u32 ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 82{
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
84 return 0;
85
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
88}
89
90static u32 ieee80211_idle_on(struct ieee80211_local *local)
91{
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
93 return 0;
94
95 drv_flush(local, false);
96
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
99}
100
fd0f979a 101void ieee80211_recalc_idle(struct ieee80211_local *local)
cc45ae54 102{
fd0f979a 103 bool working = false, scanning, active;
cc45ae54
JB		 104 unsigned int led_trig_start = 0, led_trig_stop = 0;
105 struct ieee80211_roc_work *roc;
fd0f979a 106 u32 change;
cc45ae54 107
cc45ae54
JB		 108 lockdep_assert_held(&local->mtx);
109
b759f4dd 110 active = !list_empty(&local->chanctx_list) || local->monitors;
cc45ae54
JB		 111
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
114 working = true;
fd0f979a 115 break;
cc45ae54
JB		 116 }
117 }
118
f1e3e051
JB		 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 121
cc45ae54
JB		 122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
fd0f979a 127 if (active)
cc45ae54
JB		 128 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
fd0f979a
JB		 134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
cc45ae54 136 else
fd0f979a
JB		 137 change = ieee80211_idle_on(local);
138 if (change)
139 ieee80211_hw_config(local, change);
cc45ae54
JB		 140}
141
0d143fe1
JB		 142static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
143{
09b1426e 144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 145 return -EINVAL;
0d143fe1 146
0d143fe1
JB		 147 dev->mtu = new_mtu;
148 return 0;
149}
150
478622e8
HS		 151static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
152{
153 struct ieee80211_sub_if_data *sdata;
154 u64 new, mask, tmp;
155 u8 *m;
156 int ret = 0;
157
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
159 return 0;
160
161 m = addr;
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
165
166 m = local->hw.wiphy->addr_mask;
167 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
175 continue;
176
177 m = sdata->vif.addr;
178 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
182 if ((new & ~mask) != (tmp & ~mask)) {
183 ret = -EINVAL;
184 break;
185 }
186 }
187 mutex_unlock(&local->iflist_mtx);
188
189 return ret;
190}
191
47846c9b
JB		 192static int ieee80211_change_mac(struct net_device *dev, void *addr)
193{
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 195 struct sockaddr *sa = addr;
47846c9b
JB		 196 int ret;
197
9607e6b6 198 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 199 return -EBUSY;
200
478622e8
HS		 201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
202 if (ret)
203 return ret;
204
fc5f7577 205 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 206
207 if (ret == 0)
fc5f7577 208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 209
210 return ret;
211}
212
0d143fe1
JB		 213static inline int identical_mac_addr_allowed(int type1, int type2)
214{
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
227}
228
87490f6d
JB		 229static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
0d143fe1 231{
b4a4bf5d 232 struct ieee80211_local *local = sdata->local;
87490f6d 233 struct ieee80211_sub_if_data *nsdata;
0d143fe1 234
87490f6d 235 ASSERT_RTNL();
0d143fe1
JB		 236
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 240 /*
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
244 *
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
249 */
87490f6d 250 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
252 return -EBUSY;
253
254 /*
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
257 */
371a255e
JB		 258 if (!ether_addr_equal(sdata->vif.addr,
259 nsdata->vif.addr))
0d143fe1
JB		 260 continue;
261
262 /*
263 * check whether it may have the same address
264 */
87490f6d 265 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 266 nsdata->vif.type))
267 return -ENOTUNIQ;
268
269 /*
270 * can only add VLANs to enabled APs
271 */
87490f6d 272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
275 }
276 }
277
87490f6d
JB		 278 return 0;
279}
280
3a25a8c8
JB		 281static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
282{
283 int n_queues = sdata->local->hw.queues;
284 int i;
285
0ef24e52
IP		 286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
290 return -EINVAL;
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
292 n_queues))
293 return -EINVAL;
294 }
3a25a8c8
JB		 295 }
296
8ffb5c00
BC		 297 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
298 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 299 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 300 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
301 return 0;
302 }
303
304 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
305 return -EINVAL;
306
307 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
308 return -EINVAL;
309
310 return 0;
311}
312
85416a4f
CL		 313void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
314 const int offset)
315{
316 struct ieee80211_local *local = sdata->local;
317 u32 flags = sdata->u.mntr_flags;
318
319#define ADJUST(_f, _s) do { \
320 if (flags & MONITOR_FLAG_##_f) \
321 local->fif_##_s += offset; \
322 } while (0)
323
324 ADJUST(FCSFAIL, fcsfail);
325 ADJUST(PLCPFAIL, plcpfail);
326 ADJUST(CONTROL, control);
327 ADJUST(CONTROL, pspoll);
328 ADJUST(OTHER_BSS, other_bss);
329
330#undef ADJUST
331}
332
3a25a8c8
JB		 333static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
334{
335 struct ieee80211_local *local = sdata->local;
336 int i;
337
338 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
339 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
340 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 341 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 342 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 343 else
344 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 345 }
346 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347}
348
075e0847 349static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 350{
351 struct ieee80211_sub_if_data *sdata;
685fb72b 352 int ret = 0;
4b6f1dd6
JB		 353
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
355 return 0;
356
685fb72b
JB		 357 mutex_lock(&local->iflist_mtx);
358
4b6f1dd6 359 if (local->monitor_sdata)
685fb72b 360 goto out_unlock;
4b6f1dd6
JB		 361
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
685fb72b
JB		 363 if (!sdata) {
364 ret = -ENOMEM;
365 goto out_unlock;
366 }
4b6f1dd6
JB		 367
368 /* set up data */
369 sdata->local = local;
370 sdata->vif.type = NL80211_IFTYPE_MONITOR;
371 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
372 wiphy_name(local->hw.wiphy));
373
3a25a8c8
JB		 374 ieee80211_set_default_queues(sdata);
375
4b6f1dd6
JB		 376 ret = drv_add_interface(local, sdata);
377 if (WARN_ON(ret)) {
378 /* ok .. stupid driver, it asked for this! */
379 kfree(sdata);
685fb72b 380 goto out_unlock;
4b6f1dd6
JB		 381 }
382
3a25a8c8
JB		 383 ret = ieee80211_check_queues(sdata);
384 if (ret) {
385 kfree(sdata);
685fb72b 386 goto out_unlock;
3a25a8c8
JB		 387 }
388
4bf88530 389 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 390 IEEE80211_CHANCTX_EXCLUSIVE);
391 if (ret) {
392 drv_remove_interface(local, sdata);
393 kfree(sdata);
394 goto out_unlock;
395 }
396
4b6f1dd6 397 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b
JB		 398 out_unlock:
399 mutex_unlock(&local->iflist_mtx);
400 return ret;
4b6f1dd6
JB		 401}
402
075e0847 403static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 404{
405 struct ieee80211_sub_if_data *sdata;
406
407 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
408 return;
409
685fb72b 410 mutex_lock(&local->iflist_mtx);
4b6f1dd6 411
685fb72b
JB		 412 sdata = rcu_dereference_protected(local->monitor_sdata,
413 lockdep_is_held(&local->iflist_mtx));
4b6f1dd6 414 if (!sdata)
685fb72b 415 goto out_unlock;
4b6f1dd6
JB		 416
417 rcu_assign_pointer(local->monitor_sdata, NULL);
418 synchronize_net();
419
55de908a
JB		 420 ieee80211_vif_release_channel(sdata);
421
4b6f1dd6
JB		 422 drv_remove_interface(local, sdata);
423
424 kfree(sdata);
685fb72b
JB		 425 out_unlock:
426 mutex_unlock(&local->iflist_mtx);
4b6f1dd6
JB		 427}
428
34d4bc4d
JB		 429/*
430 * NOTE: Be very careful when changing this function, it must NOT return
431 * an error on interface type changes that have been pre-checked, so most
432 * checks should be in ieee80211_check_concurrent_iface.
433 */
f142c6b9 434int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 435{
f142c6b9
JB		 436 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
437 struct net_device *dev = wdev->netdev;
87490f6d
JB		 438 struct ieee80211_local *local = sdata->local;
439 struct sta_info *sta;
440 u32 changed = 0;
441 int res;
442 u32 hw_reconf_flags = 0;
443
0d143fe1
JB		 444 switch (sdata->vif.type) {
445 case NL80211_IFTYPE_WDS:
446 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
447 return -ENOLINK;
448 break;
665c93a9
JB		 449 case NL80211_IFTYPE_AP_VLAN: {
450 struct ieee80211_sub_if_data *master;
451
0d143fe1
JB		 452 if (!sdata->bss)
453 return -ENOLINK;
665c93a9 454
0d143fe1 455 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 456
457 master = container_of(sdata->bss,
458 struct ieee80211_sub_if_data, u.ap);
459 sdata->control_port_protocol =
460 master->control_port_protocol;
461 sdata->control_port_no_encrypt =
462 master->control_port_no_encrypt;
0d143fe1 463 break;
665c93a9 464 }
0d143fe1
JB		 465 case NL80211_IFTYPE_AP:
466 sdata->bss = &sdata->u.ap;
467 break;
468 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 469 case NL80211_IFTYPE_STATION:
470 case NL80211_IFTYPE_MONITOR:
471 case NL80211_IFTYPE_ADHOC:
f142c6b9 472 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 473 /* no special treatment */
474 break;
475 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 476 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 477 case NL80211_IFTYPE_P2P_CLIENT:
478 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 479 /* cannot happen */
480 WARN_ON(1);
481 break;
482 }
483
484 if (local->open_count == 0) {
24487981 485 res = drv_start(local);
0d143fe1
JB		 486 if (res)
487 goto err_del_bss;
e8975581
JB		 488 /* we're brought up, everything changes */
489 hw_reconf_flags = ~0;
1f87f7d3 490 ieee80211_led_radio(local, true);
67408c8c
JB		 491 ieee80211_mod_tpt_led_trig(local,
492 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 493 }
494
495 /*
bf533e0b
JB		 496 * Copy the hopefully now-present MAC address to
497 * this interface, if it has the special null one.
0d143fe1 498 */
f142c6b9 499 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 500 memcpy(dev->dev_addr,
501 local->hw.wiphy->perm_addr,
502 ETH_ALEN);
503 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
504
505 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 506 res = -EADDRNOTAVAIL;
507 goto err_stop;
0adc23f5 508 }
0d143fe1
JB		 509 }
510
0d143fe1
JB		 511 switch (sdata->vif.type) {
512 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 513 /* no need to tell driver, but set carrier and chanctx */
514 if (rtnl_dereference(sdata->bss->beacon)) {
515 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 516 netif_carrier_on(dev);
4d76d21b 517 } else {
3edaf3e6 518 netif_carrier_off(dev);
4d76d21b 519 }
0d143fe1
JB		 520 break;
521 case NL80211_IFTYPE_MONITOR:
522 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
523 local->cooked_mntrs++;
524 break;
525 }
526
075e0847
JB		 527 if (local->monitors == 0 && local->open_count == 0) {
528 res = ieee80211_add_virtual_monitor(local);
529 if (res)
530 goto err_stop;
531 }
532
0d143fe1
JB		 533 /* must be before the call to ieee80211_configure_filter */
534 local->monitors++;
e8975581 535 if (local->monitors == 1) {
0869aea0
JB		 536 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
537 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 538 }
0d143fe1 539
85416a4f 540 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 541 ieee80211_configure_filter(local);
801d929c
FF		 542 mutex_lock(&local->mtx);
543 ieee80211_recalc_idle(local);
544 mutex_unlock(&local->mtx);
53e9b1de
DG		 545
546 netif_carrier_on(dev);
0d143fe1 547 break;
0d143fe1 548 default:
34d4bc4d 549 if (coming_up) {
075e0847
JB		 550 ieee80211_del_virtual_monitor(local);
551
7b7eab6f 552 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 553 if (res)
554 goto err_stop;
3a25a8c8
JB		 555 res = ieee80211_check_queues(sdata);
556 if (res)
557 goto err_del_interface;
34d4bc4d 558 }
0d143fe1 559
b207cdb0
AB		 560 drv_add_interface_debugfs(local, sdata);
561
29cbe68c 562 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 563 local->fif_pspoll++;
7be5086d 564 local->fif_probe_req++;
e3b90ca2 565
e3b90ca2 566 ieee80211_configure_filter(local);
7be5086d
JB		 567 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
568 local->fif_probe_req++;
a3c9aa51 569 }
e3b90ca2 570
f142c6b9
JB		 571 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
572 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 573 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 574
c405c629
JB		 575 switch (sdata->vif.type) {
576 case NL80211_IFTYPE_STATION:
577 case NL80211_IFTYPE_ADHOC:
578 case NL80211_IFTYPE_AP:
579 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 580 netif_carrier_off(dev);
c405c629 581 break;
1411af15 582 case NL80211_IFTYPE_WDS:
f142c6b9 583 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 584 break;
c405c629 585 default:
0d143fe1 586 netif_carrier_on(dev);
c405c629 587 }
59034591
EP		 588
589 /*
590 * set default queue parameters so drivers don't
591 * need to initialise the hardware if the hardware
592 * doesn't start up with sane defaults
593 */
3abead59 594 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 595 }
596
2d2080c3
JB		 597 set_bit(SDATA_STATE_RUNNING, &sdata->state);
598
0d143fe1
JB		 599 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
600 /* Create STA entry for the WDS peer */
601 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
602 GFP_KERNEL);
603 if (!sta) {
604 res = -ENOMEM;
605 goto err_del_interface;
606 }
607
83d5cc01
JB		 608 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
609 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
610 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 611
612 res = sta_info_insert(sta);
613 if (res) {
614 /* STA has been freed */
615 goto err_del_interface;
616 }
1be7fe8d
BJ		 617
618 rate_control_rate_init(sta);
1411af15 619 netif_carrier_on(dev);
f142c6b9
JB		 620 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
621 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 622 }
623
0d143fe1
JB		 624 /*
625 * set_multicast_list will be invoked by the networking core
626 * which will check whether any increments here were done in
627 * error and sync them down to the hardware as filter flags.
628 */
629 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
630 atomic_inc(&local->iff_allmultis);
631
632 if (sdata->flags & IEEE80211_SDATA_PROMISC)
633 atomic_inc(&local->iff_promiscs);
634
34d4bc4d
JB		 635 if (coming_up)
636 local->open_count++;
637
59034591 638 if (hw_reconf_flags)
e8975581 639 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 640
10f644a4 641 ieee80211_recalc_ps(local, -1);
965bedad 642
f142c6b9
JB		 643 if (dev)
644 netif_tx_start_all_queues(dev);
0d143fe1
JB		 645
646 return 0;
647 err_del_interface:
7b7eab6f 648 drv_remove_interface(local, sdata);
0d143fe1 649 err_stop:
24487981
JB		 650 if (!local->open_count)
651 drv_stop(local);
0d143fe1
JB		 652 err_del_bss:
653 sdata->bss = NULL;
654 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
655 list_del(&sdata->u.vlan.list);
4d6c36fa 656 /* might already be clear but that doesn't matter */
2d2080c3 657 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 658 return res;
659}
660
34d4bc4d 661static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 662{
663 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 664 int err;
665
666 /* fail early if user set an invalid address */
2fcf2824 667 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 668 return -EADDRNOTAVAIL;
669
670 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
671 if (err)
672 return err;
673
f142c6b9 674 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 675}
676
677static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
678 bool going_down)
679{
0d143fe1 680 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 681 unsigned long flags;
682 struct sk_buff *skb, *tmp;
e8975581 683 u32 hw_reconf_flags = 0;
09f4114e 684 int i, flushed;
397a7a24 685 struct ps_data *ps;
0d143fe1 686
c29acf20
RM		 687 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
688
e2fd5dbc 689 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 690 ieee80211_scan_cancel(local);
691
0d143fe1
JB		 692 /*
693 * Stop TX on this interface first.
694 */
f142c6b9
JB		 695 if (sdata->dev)
696 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 697
2eb278e0 698 ieee80211_roc_purge(sdata);
af6b6374 699
572078be
JB		 700 if (sdata->vif.type == NL80211_IFTYPE_STATION)
701 ieee80211_mgd_stop(sdata);
702
0d143fe1
JB		 703 /*
704 * Remove all stations associated with this interface.
705 *
706 * This must be done before calling ops->remove_interface()
707 * because otherwise we can later invoke ops->sta_notify()
708 * whenever the STAs are removed, and that invalidates driver
709 * assumptions about always getting a vif pointer that is valid
710 * (because if we remove a STA after ops->remove_interface()
711 * the driver will have removed the vif info already!)
712 *
09f4114e
JB		 713 * This is relevant only in WDS mode, in all other modes we've
714 * already removed all stations when disconnecting or similar,
715 * so warn otherwise.
051007d9
JB		 716 *
717 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 718 */
051007d9 719 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 720 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
721 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1
JB		 722
723 /*
724 * Don't count this interface for promisc/allmulti while it
725 * is down. dev_mc_unsync() will invoke set_multicast_list
726 * on the master interface which will sync these down to the
727 * hardware as filter flags.
728 */
729 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
730 atomic_dec(&local->iff_allmultis);
731
732 if (sdata->flags & IEEE80211_SDATA_PROMISC)
733 atomic_dec(&local->iff_promiscs);
734
7be5086d 735 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 736 local->fif_pspoll--;
7be5086d
JB		 737 local->fif_probe_req--;
738 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
739 local->fif_probe_req--;
740 }
e3b90ca2 741
f142c6b9
JB		 742 if (sdata->dev) {
743 netif_addr_lock_bh(sdata->dev);
744 spin_lock_bh(&local->filter_lock);
745 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
746 sdata->dev->addr_len);
747 spin_unlock_bh(&local->filter_lock);
748 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 749
f142c6b9
JB		 750 ieee80211_configure_filter(local);
751 }
3ac64bee 752
7cbf0ba5
VN		 753 del_timer_sync(&local->dynamic_ps_timer);
754 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 755
04ecd257
JB		 756 cancel_work_sync(&sdata->recalc_smps);
757
164eb02d
SW		 758 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
759
760 if (sdata->wdev.cac_started) {
761 mutex_lock(&local->iflist_mtx);
762 ieee80211_vif_release_channel(sdata);
763 mutex_unlock(&local->iflist_mtx);
764 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
765 GFP_KERNEL);
766 }
767
0d143fe1
JB		 768 /* APs need special treatment */
769 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 770 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 771
772 /* down all dependent devices, that is VLANs */
57c9fff3 773 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 774 u.vlan.list)
775 dev_close(vlan->dev);
776 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 777 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
778 /* remove all packets in parent bc_buf pointing to this dev */
779 ps = &sdata->bss->ps;
780
781 spin_lock_irqsave(&ps->bc_buf.lock, flags);
782 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
783 if (skb->dev == sdata->dev) {
784 __skb_unlink(skb, &ps->bc_buf);
785 local->total_ps_buffered--;
786 ieee80211_free_txskb(&local->hw, skb);
787 }
788 }
789 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 790 }
791
34d4bc4d
JB		 792 if (going_down)
793 local->open_count--;
0d143fe1
JB		 794
795 switch (sdata->vif.type) {
796 case NL80211_IFTYPE_AP_VLAN:
797 list_del(&sdata->u.vlan.list);
4d76d21b 798 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 799 /* no need to tell driver */
800 break;
801 case NL80211_IFTYPE_MONITOR:
802 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
803 local->cooked_mntrs--;
804 break;
805 }
806
807 local->monitors--;
e8975581 808 if (local->monitors == 0) {
0869aea0
JB		 809 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
810 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
075e0847 811 ieee80211_del_virtual_monitor(local);
e8975581 812 }
0d143fe1 813
85416a4f 814 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 815 ieee80211_configure_filter(local);
801d929c
FF		 816 mutex_lock(&local->mtx);
817 ieee80211_recalc_idle(local);
818 mutex_unlock(&local->mtx);
0d143fe1 819 break;
f142c6b9
JB		 820 case NL80211_IFTYPE_P2P_DEVICE:
821 /* relies on synchronize_rcu() below */
822 rcu_assign_pointer(local->p2p_sdata, NULL);
823 /* fall through */
0d143fe1 824 default:
0b7dff4f 825 cancel_work_sync(&sdata->work);
35f20c14
JB		 826 /*
827 * When we get here, the interface is marked down.
75de9113
JB		 828 *
829 * sta_info_flush_cleanup() requires rcu_barrier()
830 * first to wait for the station call_rcu() calls
831 * to complete, here we need at least sychronize_rcu()
832 * it to wait for the RX path in case it is using the
833 * interface and enqueuing frames at this very time on
834 * another CPU.
35f20c14 835 */
75de9113 836 rcu_barrier();
051007d9
JB		 837 sta_info_flush_cleanup(sdata);
838
b9dcf712
JB		 839 /*
840 * Free all remaining keys, there shouldn't be any,
7b4396bd 841 * except maybe in WDS mode?
b9dcf712 842 */
ad0e2b5a 843 ieee80211_free_keys(sdata);
b9dcf712 844
1861b845
JB		 845 /* fall through */
846 case NL80211_IFTYPE_AP:
847 skb_queue_purge(&sdata->skb_queue);
848
b207cdb0
AB		 849 drv_remove_interface_debugfs(local, sdata);
850
34d4bc4d 851 if (going_down)
7b7eab6f 852 drv_remove_interface(local, sdata);
0d143fe1
JB		 853 }
854
855 sdata->bss = NULL;
856
5cff20e6
JB		 857 ieee80211_recalc_ps(local, -1);
858
0d143fe1 859 if (local->open_count == 0) {
ea77f12f 860 ieee80211_clear_tx_pending(local);
84f6a01c 861 ieee80211_stop_device(local);
0d143fe1 862
e8975581
JB		 863 /* no reconfiguring after stop! */
864 hw_reconf_flags = 0;
0d143fe1
JB		 865 }
866
e8975581 867 /* do after stop to avoid reconfiguring when we stop anyway */
55de908a 868 if (hw_reconf_flags)
e8975581
JB		 869 ieee80211_hw_config(local, hw_reconf_flags);
870
5061b0c2
JB		 871 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
872 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
873 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
874 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
875 if (info->control.vif == &sdata->vif) {
876 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 877 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 878 }
879 }
880 }
881 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847
JB		 882
883 if (local->monitors == local->open_count && local->monitors > 0)
884 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 885}
886
887static int ieee80211_stop(struct net_device *dev)
888{
889 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
890
891 ieee80211_do_stop(sdata, true);
5061b0c2 892
0d143fe1
JB		 893 return 0;
894}
895
896static void ieee80211_set_multicast_list(struct net_device *dev)
897{
0d143fe1 898 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 899 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 900 int allmulti, promisc, sdata_allmulti, sdata_promisc;
901
902 allmulti = !!(dev->flags & IFF_ALLMULTI);
903 promisc = !!(dev->flags & IFF_PROMISC);
904 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
905 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
906
907 if (allmulti != sdata_allmulti) {
908 if (dev->flags & IFF_ALLMULTI)
909 atomic_inc(&local->iff_allmultis);
910 else
911 atomic_dec(&local->iff_allmultis);
912 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
913 }
914
915 if (promisc != sdata_promisc) {
916 if (dev->flags & IFF_PROMISC)
917 atomic_inc(&local->iff_promiscs);
918 else
919 atomic_dec(&local->iff_promiscs);
920 sdata->flags ^= IEEE80211_SDATA_PROMISC;
921 }
3b8d81e0 922 spin_lock_bh(&local->filter_lock);
22bedad3 923 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 924 spin_unlock_bh(&local->filter_lock);
3ac64bee 925 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 926}
927
75636525
JB		 928/*
929 * Called when the netdev is removed or, by the code below, before
930 * the interface type changes.
931 */
f142c6b9 932static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 933{
75636525 934 int flushed;
f0706e82
JB		 935 int i;
936
75636525
JB		 937 /* free extra data */
938 ieee80211_free_keys(sdata);
939
aee14ceb
JM		 940 ieee80211_debugfs_remove_netdev(sdata);
941
f0706e82 942 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 943 __skb_queue_purge(&sdata->fragments[i].skb_list);
944 sdata->fragment_next = 0;
11a843b7 945
b9dcf712
JB		 946 if (ieee80211_vif_is_mesh(&sdata->vif))
947 mesh_rmc_free(sdata);
75636525 948
b998e8bb 949 flushed = sta_info_flush(sdata);
75636525 950 WARN_ON(flushed);
f0706e82
JB		 951}
952
f142c6b9
JB		 953static void ieee80211_uninit(struct net_device *dev)
954{
955 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
956}
957
cf0277e7
JB		 958static u16 ieee80211_netdev_select_queue(struct net_device *dev,
959 struct sk_buff *skb)
960{
961 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
962}
963
587e729e
JB		 964static const struct net_device_ops ieee80211_dataif_ops = {
965 .ndo_open = ieee80211_open,
966 .ndo_stop = ieee80211_stop,
f142c6b9 967 .ndo_uninit = ieee80211_uninit,
587e729e 968 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 969 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 970 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 971 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 972 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 973};
974
cf0277e7
JB		 975static u16 ieee80211_monitor_select_queue(struct net_device *dev,
976 struct sk_buff *skb)
977{
978 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
979 struct ieee80211_local *local = sdata->local;
980 struct ieee80211_hdr *hdr;
981 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
982
32c5057b 983 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 984 return 0;
985
986 if (skb->len < 4 ||
b49bb574 987 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 988 return 0; /* doesn't matter, frame will be dropped */
989
b49bb574 990 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 991
00e96dec 992 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 993}
994
587e729e
JB		 995static const struct net_device_ops ieee80211_monitorif_ops = {
996 .ndo_open = ieee80211_open,
997 .ndo_stop = ieee80211_stop,
f142c6b9 998 .ndo_uninit = ieee80211_uninit,
587e729e 999 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1000 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1001 .ndo_change_mtu = ieee80211_change_mtu,
1002 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1003 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1004};
1005
1006static void ieee80211_if_setup(struct net_device *dev)
1007{
1008 ether_setup(dev);
550fd08c 1009 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1010 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1011 dev->destructor = free_netdev;
1012}
1013
1fa57d01
JB		 1014static void ieee80211_iface_work(struct work_struct *work)
1015{
1016 struct ieee80211_sub_if_data *sdata =
1017 container_of(work, struct ieee80211_sub_if_data, work);
1018 struct ieee80211_local *local = sdata->local;
1019 struct sk_buff *skb;
344eec67 1020 struct sta_info *sta;
c1475ca9 1021 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1022
1023 if (!ieee80211_sdata_running(sdata))
1024 return;
1025
1026 if (local->scanning)
1027 return;
1028
1029 /*
1030 * ieee80211_queue_work() should have picked up most cases,
1031 * here we'll pick the rest.
1032 */
1033 if (WARN(local->suspended,
1034 "interface work scheduled while going to suspend\n"))
1035 return;
1036
1037 /* first process frames */
1038 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1039 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1040
c1475ca9
JB		 1041 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1042 ra_tid = (void *)&skb->cb;
1043 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1044 ra_tid->tid);
1045 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1046 ra_tid = (void *)&skb->cb;
1047 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1048 ra_tid->tid);
1049 } else if (ieee80211_is_action(mgmt->frame_control) &&
1050 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1051 int len = skb->len;
bed7ee6e 1052
a93e3644 1053 mutex_lock(&local->sta_mtx);
875ae5f6 1054 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1055 if (sta) {
1056 switch (mgmt->u.action.u.addba_req.action_code) {
1057 case WLAN_ACTION_ADDBA_REQ:
1058 ieee80211_process_addba_request(
1059 local, sta, mgmt, len);
1060 break;
1061 case WLAN_ACTION_ADDBA_RESP:
1062 ieee80211_process_addba_resp(local, sta,
1063 mgmt, len);
1064 break;
1065 case WLAN_ACTION_DELBA:
1066 ieee80211_process_delba(sdata, sta,
1067 mgmt, len);
1068 break;
1069 default:
1070 WARN_ON(1);
1071 break;
1072 }
1073 }
a93e3644 1074 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1075 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1076 struct ieee80211_hdr *hdr = (void *)mgmt;
1077 /*
1078 * So the frame isn't mgmt, but frame_control
1079 * is at the right place anyway, of course, so
1080 * the if statement is correct.
1081 *
1082 * Warn if we have other data frame types here,
1083 * they must not get here.
1084 */
1085 WARN_ON(hdr->frame_control &
1086 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1087 WARN_ON(!(hdr->seq_ctrl &
1088 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1089 /*
1090 * This was a fragment of a frame, received while
1091 * a block-ack session was active. That cannot be
1092 * right, so terminate the session.
1093 */
a93e3644 1094 mutex_lock(&local->sta_mtx);
875ae5f6 1095 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1096 if (sta) {
1097 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1098 IEEE80211_QOS_CTL_TID_MASK;
1099
1100 __ieee80211_stop_rx_ba_session(
1101 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1102 WLAN_REASON_QSTA_REQUIRE_SETUP,
1103 true);
344eec67 1104 }
a93e3644 1105 mutex_unlock(&local->sta_mtx);
bed7ee6e 1106 } else switch (sdata->vif.type) {
1fa57d01
JB		 1107 case NL80211_IFTYPE_STATION:
1108 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1109 break;
1110 case NL80211_IFTYPE_ADHOC:
1111 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1112 break;
1113 case NL80211_IFTYPE_MESH_POINT:
1114 if (!ieee80211_vif_is_mesh(&sdata->vif))
1115 break;
1116 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1117 break;
1118 default:
1119 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1120 break;
1121 }
36b3a628
JB		 1122
1123 kfree_skb(skb);
1fa57d01
JB		 1124 }
1125
1126 /* then other type-dependent work */
1127 switch (sdata->vif.type) {
1128 case NL80211_IFTYPE_STATION:
1129 ieee80211_sta_work(sdata);
1130 break;
1131 case NL80211_IFTYPE_ADHOC:
1132 ieee80211_ibss_work(sdata);
1133 break;
1134 case NL80211_IFTYPE_MESH_POINT:
1135 if (!ieee80211_vif_is_mesh(&sdata->vif))
1136 break;
1137 ieee80211_mesh_work(sdata);
1138 break;
1139 default:
1140 break;
1141 }
1142}
1143
04ecd257
JB		 1144static void ieee80211_recalc_smps_work(struct work_struct *work)
1145{
1146 struct ieee80211_sub_if_data *sdata =
1147 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1148
1149 ieee80211_recalc_smps(sdata);
1150}
1fa57d01 1151
75636525
JB		 1152/*
1153 * Helper function to initialise an interface to a specific type.
1154 */
1155static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1156 enum nl80211_iftype type)
f0706e82 1157{
75636525
JB		 1158 /* clear type-dependent union */
1159 memset(&sdata->u, 0, sizeof(sdata->u));
1160
1161 /* and set some type-dependent values */
1162 sdata->vif.type = type;
2ca27bcf 1163 sdata->vif.p2p = false;
60719ffd 1164 sdata->wdev.iftype = type;
75636525 1165
a621fa4d
JB		 1166 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1167 sdata->control_port_no_encrypt = false;
1168
b53be792
SW		 1169 sdata->noack_map = 0;
1170
f142c6b9
JB		 1171 /* only monitor/p2p-device differ */
1172 if (sdata->dev) {
1173 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1174 sdata->dev->type = ARPHRD_ETHER;
1175 }
75636525 1176
35f20c14 1177 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1178 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1179 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1180
75636525 1181 switch (type) {
2ca27bcf
JB		 1182 case NL80211_IFTYPE_P2P_GO:
1183 type = NL80211_IFTYPE_AP;
1184 sdata->vif.type = type;
1185 sdata->vif.p2p = true;
1186 /* fall through */
05c914fe 1187 case NL80211_IFTYPE_AP:
d012a605 1188 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1189 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1190 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1191 break;
2ca27bcf
JB		 1192 case NL80211_IFTYPE_P2P_CLIENT:
1193 type = NL80211_IFTYPE_STATION;
1194 sdata->vif.type = type;
1195 sdata->vif.p2p = true;
1196 /* fall through */
05c914fe 1197 case NL80211_IFTYPE_STATION:
ad2d223a 1198 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1199 ieee80211_sta_setup_sdata(sdata);
472dbc45 1200 break;
46900298 1201 case NL80211_IFTYPE_ADHOC:
ad2d223a 1202 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1203 ieee80211_ibss_setup_sdata(sdata);
1204 break;
05c914fe 1205 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1206 if (ieee80211_vif_is_mesh(&sdata->vif))
1207 ieee80211_mesh_init_sdata(sdata);
1208 break;
05c914fe 1209 case NL80211_IFTYPE_MONITOR:
75636525 1210 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1211 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1212 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1213 MONITOR_FLAG_OTHER_BSS;
1214 break;
05c914fe 1215 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1216 sdata->vif.bss_conf.bssid = NULL;
1217 break;
05c914fe 1218 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1219 break;
98104fde 1220 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1221 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1222 break;
05c914fe 1223 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1224 case NUM_NL80211_IFTYPES:
75636525
JB		 1225 BUG();
1226 break;
1227 }
1228
1229 ieee80211_debugfs_add_netdev(sdata);
1230}
1231
34d4bc4d
JB		 1232static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1233 enum nl80211_iftype type)
1234{
1235 struct ieee80211_local *local = sdata->local;
1236 int ret, err;
2ca27bcf
JB		 1237 enum nl80211_iftype internal_type = type;
1238 bool p2p = false;
34d4bc4d
JB		 1239
1240 ASSERT_RTNL();
1241
1242 if (!local->ops->change_interface)
1243 return -EBUSY;
1244
1245 switch (sdata->vif.type) {
1246 case NL80211_IFTYPE_AP:
1247 case NL80211_IFTYPE_STATION:
1248 case NL80211_IFTYPE_ADHOC:
1249 /*
1250 * Could maybe also all others here?
1251 * Just not sure how that interacts
1252 * with the RX/config path e.g. for
1253 * mesh.
1254 */
1255 break;
1256 default:
1257 return -EBUSY;
1258 }
1259
1260 switch (type) {
1261 case NL80211_IFTYPE_AP:
1262 case NL80211_IFTYPE_STATION:
1263 case NL80211_IFTYPE_ADHOC:
1264 /*
1265 * Could probably support everything
1266 * but WDS here (WDS do_open can fail
1267 * under memory pressure, which this
1268 * code isn't prepared to handle).
1269 */
1270 break;
2ca27bcf
JB		 1271 case NL80211_IFTYPE_P2P_CLIENT:
1272 p2p = true;
1273 internal_type = NL80211_IFTYPE_STATION;
1274 break;
1275 case NL80211_IFTYPE_P2P_GO:
1276 p2p = true;
1277 internal_type = NL80211_IFTYPE_AP;
1278 break;
34d4bc4d
JB		 1279 default:
1280 return -EBUSY;
1281 }
1282
2ca27bcf 1283 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1284 if (ret)
1285 return ret;
1286
1287 ieee80211_do_stop(sdata, false);
1288
f142c6b9 1289 ieee80211_teardown_sdata(sdata);
34d4bc4d 1290
2ca27bcf 1291 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1292 if (ret)
1293 type = sdata->vif.type;
1294
3a25a8c8
JB		 1295 /*
1296 * Ignore return value here, there's not much we can do since
1297 * the driver changed the interface type internally already.
1298 * The warnings will hopefully make driver authors fix it :-)
1299 */
1300 ieee80211_check_queues(sdata);
1301
34d4bc4d
JB		 1302 ieee80211_setup_sdata(sdata, type);
1303
f142c6b9 1304 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1305 WARN(err, "type change: do_open returned %d", err);
1306
1307 return ret;
1308}
1309
f3947e2d 1310int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1311 enum nl80211_iftype type)
75636525 1312{
34d4bc4d
JB		 1313 int ret;
1314
f3947e2d
JB		 1315 ASSERT_RTNL();
1316
2ca27bcf 1317 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1318 return 0;
1319
34d4bc4d
JB		 1320 if (ieee80211_sdata_running(sdata)) {
1321 ret = ieee80211_runtime_change_iftype(sdata, type);
1322 if (ret)
1323 return ret;
1324 } else {
1325 /* Purge and reset type-dependent state. */
f142c6b9 1326 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1327 ieee80211_setup_sdata(sdata, type);
1328 }
75636525
JB		 1329
1330 /* reset some values that shouldn't be kept across type changes */
75636525 1331 sdata->drop_unencrypted = 0;
9bc383de
JB		 1332 if (type == NL80211_IFTYPE_STATION)
1333 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1334
1335 return 0;
f0706e82
JB		 1336}
1337
fa9029f8 1338static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1339 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1340{
1341 struct ieee80211_sub_if_data *sdata;
1342 u64 mask, start, addr, val, inc;
1343 u8 *m;
1344 u8 tmp_addr[ETH_ALEN];
1345 int i;
1346
1347 /* default ... something at least */
f142c6b9 1348 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1349
1350 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1351 local->hw.wiphy->n_addresses <= 1)
1352 return;
1353
fa9029f8
JB		 1354 mutex_lock(&local->iflist_mtx);
1355
1356 switch (type) {
1357 case NL80211_IFTYPE_MONITOR:
1358 /* doesn't matter */
1359 break;
1360 case NL80211_IFTYPE_WDS:
1361 case NL80211_IFTYPE_AP_VLAN:
1362 /* match up with an AP interface */
1363 list_for_each_entry(sdata, &local->interfaces, list) {
1364 if (sdata->vif.type != NL80211_IFTYPE_AP)
1365 continue;
f142c6b9 1366 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1367 break;
1368 }
1369 /* keep default if no AP interface present */
1370 break;
6d71117a
JB		 1371 case NL80211_IFTYPE_P2P_CLIENT:
1372 case NL80211_IFTYPE_P2P_GO:
1373 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1374 list_for_each_entry(sdata, &local->interfaces, list) {
1375 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1376 continue;
1377 if (!ieee80211_sdata_running(sdata))
1378 continue;
1379 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1380 goto out_unlock;
1381 }
1382 }
1383 /* otherwise fall through */
fa9029f8
JB		 1384 default:
1385 /* assign a new address if possible -- try n_addresses first */
1386 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1387 bool used = false;
1388
1389 list_for_each_entry(sdata, &local->interfaces, list) {
1390 if (memcmp(local->hw.wiphy->addresses[i].addr,
1391 sdata->vif.addr, ETH_ALEN) == 0) {
1392 used = true;
1393 break;
1394 }
1395 }
1396
1397 if (!used) {
f142c6b9 1398 memcpy(perm_addr,
fa9029f8
JB		 1399 local->hw.wiphy->addresses[i].addr,
1400 ETH_ALEN);
1401 break;
1402 }
1403 }
1404
1405 /* try mask if available */
1406 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1407 break;
1408
1409 m = local->hw.wiphy->addr_mask;
1410 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1411 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1412 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1413
1414 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1415 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1416 pr_info("not contiguous\n");
fa9029f8
JB		 1417 break;
1418 }
1419
1420 m = local->hw.wiphy->perm_addr;
1421 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1422 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1423 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1424
1425 inc = 1ULL<<__ffs64(mask);
1426 val = (start & mask);
1427 addr = (start & ~mask) | (val & mask);
1428 do {
1429 bool used = false;
1430
1431 tmp_addr[5] = addr >> 0*8;
1432 tmp_addr[4] = addr >> 1*8;
1433 tmp_addr[3] = addr >> 2*8;
1434 tmp_addr[2] = addr >> 3*8;
1435 tmp_addr[1] = addr >> 4*8;
1436 tmp_addr[0] = addr >> 5*8;
1437
1438 val += inc;
1439
1440 list_for_each_entry(sdata, &local->interfaces, list) {
1441 if (memcmp(tmp_addr, sdata->vif.addr,
1442 ETH_ALEN) == 0) {
1443 used = true;
1444 break;
1445 }
1446 }
1447
1448 if (!used) {
f142c6b9 1449 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1450 break;
1451 }
1452 addr = (start & ~mask) | (val & mask);
1453 } while (addr != start);
1454
1455 break;
1456 }
1457
6d71117a 1458 out_unlock:
fa9029f8
JB		 1459 mutex_unlock(&local->iflist_mtx);
1460}
1461
97f97b1f
JB		 1462static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1463{
1464 struct ieee80211_sub_if_data *sdata;
1465
1466 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1467
1468 ieee80211_cleanup_sdata_stas(sdata);
1469}
1470
3e122be0 1471int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1472 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1473 struct vif_params *params)
f0706e82 1474{
f142c6b9 1475 struct net_device *ndev = NULL;
f0706e82 1476 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1477 int ret, i;
ded81f6b 1478 int txqs = 1;
f0706e82
JB		 1479
1480 ASSERT_RTNL();
75636525 1481
f142c6b9
JB		 1482 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1483 struct wireless_dev *wdev;
1484
1485 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1486 GFP_KERNEL);
1487 if (!sdata)
1488 return -ENOMEM;
1489 wdev = &sdata->wdev;
1490
1491 sdata->dev = NULL;
1492 strlcpy(sdata->name, name, IFNAMSIZ);
1493 ieee80211_assign_perm_addr(local, wdev->address, type);
1494 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1495 } else {
1496 if (local->hw.queues >= IEEE80211_NUM_ACS)
1497 txqs = IEEE80211_NUM_ACS;
1498
1499 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1500 local->hw.vif_data_size,
1501 name, ieee80211_if_setup, txqs, 1);
1502 if (!ndev)
1503 return -ENOMEM;
1504 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1505
1506 ndev->needed_headroom = local->tx_headroom +
1507 4*6 /* four MAC addresses */
1508 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1509 + 6 /* mesh */
1510 + 8 /* rfc1042/bridge tunnel */
1511 - ETH_HLEN /* ethernet hard_header_len */
1512 + IEEE80211_ENCRYPT_HEADROOM;
1513 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1514
1515 ret = dev_alloc_name(ndev, ndev->name);
1516 if (ret < 0) {
1517 free_netdev(ndev);
1518 return ret;
1519 }
1520
1521 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1522 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1523 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1524
1525 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1526 sdata = netdev_priv(ndev);
1527 ndev->ieee80211_ptr = &sdata->wdev;
1528 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1529 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1530
1531 sdata->dev = ndev;
1532 }
75636525
JB		 1533
1534 /* initialise type-independent data */
f0706e82 1535 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1536 sdata->local = local;
75636525
JB		 1537
1538 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1539 skb_queue_head_init(&sdata->fragments[i].skb_list);
1540
1541 INIT_LIST_HEAD(&sdata->key_list);
1542
97f97b1f
JB		 1543 spin_lock_init(&sdata->cleanup_stations_lock);
1544 INIT_LIST_HEAD(&sdata->cleanup_stations);
1545 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1546 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1547 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1548 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1549 ieee80211_delayed_tailroom_dec);
97f97b1f 1550
37eb0b16
JM		 1551 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1552 struct ieee80211_supported_band *sband;
1553 sband = local->hw.wiphy->bands[i];
1554 sdata->rc_rateidx_mask[i] =
1555 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1556 if (sband)
1557 memcpy(sdata->rc_rateidx_mcs_mask[i],
1558 sband->ht_cap.mcs.rx_mask,
1559 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1560 else
1561 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1562 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1563 }
75636525 1564
3a25a8c8
JB		 1565 ieee80211_set_default_queues(sdata);
1566
1ea6f9c0
JB		 1567 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1568 sdata->user_power_level = local->user_power_level;
1569
75636525
JB		 1570 /* setup type-dependent data */
1571 ieee80211_setup_sdata(sdata, type);
f0706e82 1572
f142c6b9
JB		 1573 if (ndev) {
1574 if (params) {
1575 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1576 if (type == NL80211_IFTYPE_STATION)
1577 sdata->u.mgd.use_4addr = params->use_4addr;
1578 }
9bc383de 1579
f142c6b9 1580 ndev->features |= local->hw.netdev_features;
72d78728 1581
f142c6b9
JB		 1582 ret = register_netdevice(ndev);
1583 if (ret) {
1584 free_netdev(ndev);
1585 return ret;
1586 }
1587 }
f0706e82 1588
c771c9d8 1589 mutex_lock(&local->iflist_mtx);
79010420 1590 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1591 mutex_unlock(&local->iflist_mtx);
79010420 1592
84efbb84
JB		 1593 if (new_wdev)
1594 *new_wdev = &sdata->wdev;
f0706e82 1595
f0706e82 1596 return 0;
f0706e82
JB		 1597}
1598
f698d856 1599void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1600{
f0706e82 1601 ASSERT_RTNL();
11a843b7 1602
c771c9d8 1603 mutex_lock(&sdata->local->iflist_mtx);
75636525 1604 list_del_rcu(&sdata->list);
c771c9d8
JB		 1605 mutex_unlock(&sdata->local->iflist_mtx);
1606
75636525 1607 synchronize_rcu();
f142c6b9
JB		 1608
1609 if (sdata->dev) {
1610 unregister_netdevice(sdata->dev);
1611 } else {
1612 cfg80211_unregister_wdev(&sdata->wdev);
1613 kfree(sdata);
1614 }
1615}
1616
1617void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1618{
1619 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1620 return;
1621 ieee80211_do_stop(sdata, true);
1622 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1623}
1624
75636525
JB		 1625/*
1626 * Remove all interfaces, may only be called at hardware unregistration
1627 * time because it doesn't do RCU-safe list removals.
1628 */
1629void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1630{
75636525 1631 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1632 LIST_HEAD(unreg_list);
f142c6b9 1633 LIST_HEAD(wdev_list);
f0706e82
JB		 1634
1635 ASSERT_RTNL();
1636
efe117ab 1637 mutex_lock(&local->iflist_mtx);
75636525
JB		 1638 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1639 list_del(&sdata->list);
c771c9d8 1640
f142c6b9
JB		 1641 if (sdata->dev)
1642 unregister_netdevice_queue(sdata->dev, &unreg_list);
1643 else
1644 list_add(&sdata->list, &wdev_list);
f0706e82 1645 }
efe117ab
ED		 1646 mutex_unlock(&local->iflist_mtx);
1647 unregister_netdevice_many(&unreg_list);
5f04d506 1648 list_del(&unreg_list);
f142c6b9
JB		 1649
1650 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1651 list_del(&sdata->list);
1652 cfg80211_unregister_wdev(&sdata->wdev);
1653 kfree(sdata);
1654 }
f0706e82 1655}
5cff20e6 1656
47846c9b
JB		 1657static int netdev_notify(struct notifier_block *nb,
1658 unsigned long state,
1659 void *ndev)
1660{
1661 struct net_device *dev = ndev;
1662 struct ieee80211_sub_if_data *sdata;
1663
1664 if (state != NETDEV_CHANGENAME)
1665 return 0;
1666
1667 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1668 return 0;
1669
1670 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1671 return 0;
1672
1673 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1674
2f5265e6 1675 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1676
1677 ieee80211_debugfs_rename_netdev(sdata);
1678 return 0;
1679}
1680
1681static struct notifier_block mac80211_netdev_notifier = {
1682 .notifier_call = netdev_notify,
1683};
1684
1685int ieee80211_iface_init(void)
1686{
1687 return register_netdevice_notifier(&mac80211_netdev_notifier);
1688}
1689
1690void ieee80211_iface_exit(void)
1691{
1692 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1693}
Linux kernel - Deliverables
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