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regulatory: use IS_ERR macro family for freq_reg_info
[linux-2.6-block.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
cc45ae54
JB		 81static u32 ieee80211_idle_off(struct ieee80211_local *local,
82 const char *reason)
83{
84 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
85 return 0;
86
87 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
88 return IEEE80211_CONF_CHANGE_IDLE;
89}
90
91static u32 ieee80211_idle_on(struct ieee80211_local *local)
92{
93 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
94 return 0;
95
96 drv_flush(local, false);
97
98 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
99 return IEEE80211_CONF_CHANGE_IDLE;
100}
101
102static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
103{
104 struct ieee80211_sub_if_data *sdata;
105 int count = 0;
106 bool working = false, scanning = false;
107 unsigned int led_trig_start = 0, led_trig_stop = 0;
108 struct ieee80211_roc_work *roc;
109
110#ifdef CONFIG_PROVE_LOCKING
111 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
112 !lockdep_is_held(&local->iflist_mtx));
113#endif
114 lockdep_assert_held(&local->mtx);
115
116 list_for_each_entry(sdata, &local->interfaces, list) {
117 if (!ieee80211_sdata_running(sdata)) {
118 sdata->vif.bss_conf.idle = true;
119 continue;
120 }
121
122 sdata->old_idle = sdata->vif.bss_conf.idle;
123
124 /* do not count disabled managed interfaces */
125 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
126 !sdata->u.mgd.associated &&
127 !sdata->u.mgd.auth_data &&
128 !sdata->u.mgd.assoc_data) {
129 sdata->vif.bss_conf.idle = true;
130 continue;
131 }
132 /* do not count unused IBSS interfaces */
133 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
134 !sdata->u.ibss.ssid_len) {
135 sdata->vif.bss_conf.idle = true;
136 continue;
137 }
f142c6b9
JB		 138
139 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
140 continue;
141
cc45ae54
JB		 142 /* count everything else */
143 sdata->vif.bss_conf.idle = false;
144 count++;
145 }
146
147 if (!local->ops->remain_on_channel) {
148 list_for_each_entry(roc, &local->roc_list, list) {
149 working = true;
150 roc->sdata->vif.bss_conf.idle = false;
151 }
152 }
153
e2fd5dbc
JB		 154 sdata = rcu_dereference_protected(local->scan_sdata,
155 lockdep_is_held(&local->mtx));
156 if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
cc45ae54 157 scanning = true;
e2fd5dbc 158 sdata->vif.bss_conf.idle = false;
cc45ae54
JB		 159 }
160
161 list_for_each_entry(sdata, &local->interfaces, list) {
162 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 163 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
164 sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
cc45ae54
JB		 165 continue;
166 if (sdata->old_idle == sdata->vif.bss_conf.idle)
167 continue;
168 if (!ieee80211_sdata_running(sdata))
169 continue;
170 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
171 }
172
173 if (working || scanning)
174 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
175 else
176 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
177
178 if (count)
179 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
180 else
181 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
182
183 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
184
185 if (working)
186 return ieee80211_idle_off(local, "working");
187 if (scanning)
188 return ieee80211_idle_off(local, "scanning");
189 if (!count)
190 return ieee80211_idle_on(local);
191 else
192 return ieee80211_idle_off(local, "in use");
193
194 return 0;
195}
196
197void ieee80211_recalc_idle(struct ieee80211_local *local)
198{
199 u32 chg;
200
201 mutex_lock(&local->iflist_mtx);
202 chg = __ieee80211_recalc_idle(local);
203 mutex_unlock(&local->iflist_mtx);
204 if (chg)
205 ieee80211_hw_config(local, chg);
206}
207
0d143fe1
JB		 208static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
209{
09b1426e 210 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 211 return -EINVAL;
0d143fe1 212
0d143fe1
JB		 213 dev->mtu = new_mtu;
214 return 0;
215}
216
478622e8
HS		 217static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
218{
219 struct ieee80211_sub_if_data *sdata;
220 u64 new, mask, tmp;
221 u8 *m;
222 int ret = 0;
223
224 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
225 return 0;
226
227 m = addr;
228 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
229 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
230 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
231
232 m = local->hw.wiphy->addr_mask;
233 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
234 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
235 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
236
237
238 mutex_lock(&local->iflist_mtx);
239 list_for_each_entry(sdata, &local->interfaces, list) {
240 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
241 continue;
242
243 m = sdata->vif.addr;
244 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
245 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
246 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
247
248 if ((new & ~mask) != (tmp & ~mask)) {
249 ret = -EINVAL;
250 break;
251 }
252 }
253 mutex_unlock(&local->iflist_mtx);
254
255 return ret;
256}
257
47846c9b
JB		 258static int ieee80211_change_mac(struct net_device *dev, void *addr)
259{
260 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 261 struct sockaddr *sa = addr;
47846c9b
JB		 262 int ret;
263
9607e6b6 264 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 265 return -EBUSY;
266
478622e8
HS		 267 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
268 if (ret)
269 return ret;
270
fc5f7577 271 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 272
273 if (ret == 0)
fc5f7577 274 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 275
276 return ret;
277}
278
0d143fe1
JB		 279static inline int identical_mac_addr_allowed(int type1, int type2)
280{
281 return type1 == NL80211_IFTYPE_MONITOR ||
282 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 283 type1 == NL80211_IFTYPE_P2P_DEVICE ||
284 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 285 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
286 (type1 == NL80211_IFTYPE_WDS &&
287 (type2 == NL80211_IFTYPE_WDS ||
288 type2 == NL80211_IFTYPE_AP)) ||
289 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
290 (type1 == NL80211_IFTYPE_AP_VLAN &&
291 (type2 == NL80211_IFTYPE_AP ||
292 type2 == NL80211_IFTYPE_AP_VLAN));
293}
294
87490f6d
JB		 295static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
296 enum nl80211_iftype iftype)
0d143fe1 297{
b4a4bf5d 298 struct ieee80211_local *local = sdata->local;
87490f6d 299 struct ieee80211_sub_if_data *nsdata;
0d143fe1 300
87490f6d 301 ASSERT_RTNL();
0d143fe1
JB		 302
303 /* we hold the RTNL here so can safely walk the list */
304 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 305 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 306 /*
307 * Allow only a single IBSS interface to be up at any
308 * time. This is restricted because beacon distribution
309 * cannot work properly if both are in the same IBSS.
310 *
311 * To remove this restriction we'd have to disallow them
312 * from setting the same SSID on different IBSS interfaces
313 * belonging to the same hardware. Then, however, we're
314 * faced with having to adopt two different TSF timers...
315 */
87490f6d 316 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 317 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
318 return -EBUSY;
319
320 /*
321 * The remaining checks are only performed for interfaces
322 * with the same MAC address.
323 */
371a255e
JB		 324 if (!ether_addr_equal(sdata->vif.addr,
325 nsdata->vif.addr))
0d143fe1
JB		 326 continue;
327
328 /*
329 * check whether it may have the same address
330 */
87490f6d 331 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 332 nsdata->vif.type))
333 return -ENOTUNIQ;
334
335 /*
336 * can only add VLANs to enabled APs
337 */
87490f6d 338 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 339 nsdata->vif.type == NL80211_IFTYPE_AP)
340 sdata->bss = &nsdata->u.ap;
341 }
342 }
343
87490f6d
JB		 344 return 0;
345}
346
3a25a8c8
JB		 347static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
348{
349 int n_queues = sdata->local->hw.queues;
350 int i;
351
0ef24e52
IP		 352 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
353 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
354 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
355 IEEE80211_INVAL_HW_QUEUE))
356 return -EINVAL;
357 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
358 n_queues))
359 return -EINVAL;
360 }
3a25a8c8
JB		 361 }
362
bb3e10fb
LC		 363 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
364 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 365 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
366 return 0;
367 }
368
369 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
370 return -EINVAL;
371
372 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
373 return -EINVAL;
374
375 return 0;
376}
377
85416a4f
CL		 378void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
379 const int offset)
380{
381 struct ieee80211_local *local = sdata->local;
382 u32 flags = sdata->u.mntr_flags;
383
384#define ADJUST(_f, _s) do { \
385 if (flags & MONITOR_FLAG_##_f) \
386 local->fif_##_s += offset; \
387 } while (0)
388
389 ADJUST(FCSFAIL, fcsfail);
390 ADJUST(PLCPFAIL, plcpfail);
391 ADJUST(CONTROL, control);
392 ADJUST(CONTROL, pspoll);
393 ADJUST(OTHER_BSS, other_bss);
394
395#undef ADJUST
396}
397
3a25a8c8
JB		 398static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
399{
400 struct ieee80211_local *local = sdata->local;
401 int i;
402
403 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
404 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
405 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 406 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 407 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 408 else
409 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 410 }
411 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
412}
413
075e0847 414static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 415{
416 struct ieee80211_sub_if_data *sdata;
685fb72b 417 int ret = 0;
4b6f1dd6
JB		 418
419 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
420 return 0;
421
685fb72b
JB		 422 mutex_lock(&local->iflist_mtx);
423
4b6f1dd6 424 if (local->monitor_sdata)
685fb72b 425 goto out_unlock;
4b6f1dd6
JB		 426
427 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
685fb72b
JB		 428 if (!sdata) {
429 ret = -ENOMEM;
430 goto out_unlock;
431 }
4b6f1dd6
JB		 432
433 /* set up data */
434 sdata->local = local;
435 sdata->vif.type = NL80211_IFTYPE_MONITOR;
436 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
437 wiphy_name(local->hw.wiphy));
438
3a25a8c8
JB		 439 ieee80211_set_default_queues(sdata);
440
4b6f1dd6
JB		 441 ret = drv_add_interface(local, sdata);
442 if (WARN_ON(ret)) {
443 /* ok .. stupid driver, it asked for this! */
444 kfree(sdata);
685fb72b 445 goto out_unlock;
4b6f1dd6
JB		 446 }
447
3a25a8c8
JB		 448 ret = ieee80211_check_queues(sdata);
449 if (ret) {
450 kfree(sdata);
685fb72b 451 goto out_unlock;
3a25a8c8
JB		 452 }
453
4bf88530 454 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 455 IEEE80211_CHANCTX_EXCLUSIVE);
456 if (ret) {
457 drv_remove_interface(local, sdata);
458 kfree(sdata);
459 goto out_unlock;
460 }
461
4b6f1dd6 462 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b
JB		 463 out_unlock:
464 mutex_unlock(&local->iflist_mtx);
465 return ret;
4b6f1dd6
JB		 466}
467
075e0847 468static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 469{
470 struct ieee80211_sub_if_data *sdata;
471
472 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
473 return;
474
685fb72b 475 mutex_lock(&local->iflist_mtx);
4b6f1dd6 476
685fb72b
JB		 477 sdata = rcu_dereference_protected(local->monitor_sdata,
478 lockdep_is_held(&local->iflist_mtx));
4b6f1dd6 479 if (!sdata)
685fb72b 480 goto out_unlock;
4b6f1dd6
JB		 481
482 rcu_assign_pointer(local->monitor_sdata, NULL);
483 synchronize_net();
484
55de908a
JB		 485 ieee80211_vif_release_channel(sdata);
486
4b6f1dd6
JB		 487 drv_remove_interface(local, sdata);
488
489 kfree(sdata);
685fb72b
JB		 490 out_unlock:
491 mutex_unlock(&local->iflist_mtx);
4b6f1dd6
JB		 492}
493
34d4bc4d
JB		 494/*
495 * NOTE: Be very careful when changing this function, it must NOT return
496 * an error on interface type changes that have been pre-checked, so most
497 * checks should be in ieee80211_check_concurrent_iface.
498 */
f142c6b9 499int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 500{
f142c6b9
JB		 501 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
502 struct net_device *dev = wdev->netdev;
87490f6d
JB		 503 struct ieee80211_local *local = sdata->local;
504 struct sta_info *sta;
505 u32 changed = 0;
506 int res;
507 u32 hw_reconf_flags = 0;
508
0d143fe1
JB		 509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_WDS:
511 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
512 return -ENOLINK;
513 break;
665c93a9
JB		 514 case NL80211_IFTYPE_AP_VLAN: {
515 struct ieee80211_sub_if_data *master;
516
0d143fe1
JB		 517 if (!sdata->bss)
518 return -ENOLINK;
665c93a9 519
0d143fe1 520 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 521
522 master = container_of(sdata->bss,
523 struct ieee80211_sub_if_data, u.ap);
524 sdata->control_port_protocol =
525 master->control_port_protocol;
526 sdata->control_port_no_encrypt =
527 master->control_port_no_encrypt;
0d143fe1 528 break;
665c93a9 529 }
0d143fe1
JB		 530 case NL80211_IFTYPE_AP:
531 sdata->bss = &sdata->u.ap;
532 break;
533 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 534 case NL80211_IFTYPE_STATION:
535 case NL80211_IFTYPE_MONITOR:
536 case NL80211_IFTYPE_ADHOC:
f142c6b9 537 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 538 /* no special treatment */
539 break;
540 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 541 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 542 case NL80211_IFTYPE_P2P_CLIENT:
543 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 544 /* cannot happen */
545 WARN_ON(1);
546 break;
547 }
548
549 if (local->open_count == 0) {
24487981 550 res = drv_start(local);
0d143fe1
JB		 551 if (res)
552 goto err_del_bss;
4e6cbfd0
JL		 553 if (local->ops->napi_poll)
554 napi_enable(&local->napi);
e8975581
JB		 555 /* we're brought up, everything changes */
556 hw_reconf_flags = ~0;
1f87f7d3 557 ieee80211_led_radio(local, true);
67408c8c
JB		 558 ieee80211_mod_tpt_led_trig(local,
559 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 560 }
561
562 /*
bf533e0b
JB		 563 * Copy the hopefully now-present MAC address to
564 * this interface, if it has the special null one.
0d143fe1 565 */
f142c6b9 566 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 567 memcpy(dev->dev_addr,
568 local->hw.wiphy->perm_addr,
569 ETH_ALEN);
570 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
571
572 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 573 res = -EADDRNOTAVAIL;
574 goto err_stop;
0adc23f5 575 }
0d143fe1
JB		 576 }
577
0d143fe1
JB		 578 switch (sdata->vif.type) {
579 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 580 /* no need to tell driver, but set carrier and chanctx */
581 if (rtnl_dereference(sdata->bss->beacon)) {
582 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 583 netif_carrier_on(dev);
4d76d21b 584 } else {
3edaf3e6 585 netif_carrier_off(dev);
4d76d21b 586 }
0d143fe1
JB		 587 break;
588 case NL80211_IFTYPE_MONITOR:
589 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
590 local->cooked_mntrs++;
591 break;
592 }
593
075e0847
JB		 594 if (local->monitors == 0 && local->open_count == 0) {
595 res = ieee80211_add_virtual_monitor(local);
596 if (res)
597 goto err_stop;
598 }
599
0d143fe1
JB		 600 /* must be before the call to ieee80211_configure_filter */
601 local->monitors++;
e8975581 602 if (local->monitors == 1) {
0869aea0
JB		 603 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
604 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 605 }
0d143fe1 606
85416a4f 607 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 608 ieee80211_configure_filter(local);
53e9b1de
DG		 609
610 netif_carrier_on(dev);
0d143fe1 611 break;
0d143fe1 612 default:
34d4bc4d 613 if (coming_up) {
075e0847
JB		 614 ieee80211_del_virtual_monitor(local);
615
7b7eab6f 616 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 617 if (res)
618 goto err_stop;
3a25a8c8
JB		 619 res = ieee80211_check_queues(sdata);
620 if (res)
621 goto err_del_interface;
34d4bc4d 622 }
0d143fe1 623
29cbe68c 624 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 625 local->fif_pspoll++;
7be5086d 626 local->fif_probe_req++;
e3b90ca2 627
e3b90ca2 628 ieee80211_configure_filter(local);
7be5086d
JB		 629 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
630 local->fif_probe_req++;
a3c9aa51 631 }
e3b90ca2 632
f142c6b9
JB		 633 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
634 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 635 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 636
c405c629
JB		 637 switch (sdata->vif.type) {
638 case NL80211_IFTYPE_STATION:
639 case NL80211_IFTYPE_ADHOC:
640 case NL80211_IFTYPE_AP:
641 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 642 netif_carrier_off(dev);
c405c629 643 break;
1411af15 644 case NL80211_IFTYPE_WDS:
f142c6b9 645 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 646 break;
c405c629 647 default:
0d143fe1 648 netif_carrier_on(dev);
c405c629 649 }
59034591
EP		 650
651 /*
652 * set default queue parameters so drivers don't
653 * need to initialise the hardware if the hardware
654 * doesn't start up with sane defaults
655 */
3abead59 656 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 657 }
658
2d2080c3
JB		 659 set_bit(SDATA_STATE_RUNNING, &sdata->state);
660
0d143fe1
JB		 661 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
662 /* Create STA entry for the WDS peer */
663 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
664 GFP_KERNEL);
665 if (!sta) {
666 res = -ENOMEM;
667 goto err_del_interface;
668 }
669
83d5cc01
JB		 670 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
671 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
672 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 673
674 res = sta_info_insert(sta);
675 if (res) {
676 /* STA has been freed */
677 goto err_del_interface;
678 }
1be7fe8d
BJ		 679
680 rate_control_rate_init(sta);
1411af15 681 netif_carrier_on(dev);
f142c6b9
JB		 682 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
683 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 684 }
685
0d143fe1
JB		 686 /*
687 * set_multicast_list will be invoked by the networking core
688 * which will check whether any increments here were done in
689 * error and sync them down to the hardware as filter flags.
690 */
691 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
692 atomic_inc(&local->iff_allmultis);
693
694 if (sdata->flags & IEEE80211_SDATA_PROMISC)
695 atomic_inc(&local->iff_promiscs);
696
7da7cc1d 697 mutex_lock(&local->mtx);
5cff20e6 698 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 699 mutex_unlock(&local->mtx);
5cff20e6 700
34d4bc4d
JB		 701 if (coming_up)
702 local->open_count++;
703
59034591 704 if (hw_reconf_flags)
e8975581 705 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 706
10f644a4 707 ieee80211_recalc_ps(local, -1);
965bedad 708
f142c6b9
JB		 709 if (dev)
710 netif_tx_start_all_queues(dev);
0d143fe1
JB		 711
712 return 0;
713 err_del_interface:
7b7eab6f 714 drv_remove_interface(local, sdata);
0d143fe1 715 err_stop:
24487981
JB		 716 if (!local->open_count)
717 drv_stop(local);
0d143fe1
JB		 718 err_del_bss:
719 sdata->bss = NULL;
720 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
721 list_del(&sdata->u.vlan.list);
4d6c36fa 722 /* might already be clear but that doesn't matter */
2d2080c3 723 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 724 return res;
725}
726
34d4bc4d 727static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 728{
729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 730 int err;
731
732 /* fail early if user set an invalid address */
2fcf2824 733 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 734 return -EADDRNOTAVAIL;
735
736 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
737 if (err)
738 return err;
739
f142c6b9 740 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 741}
742
743static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
744 bool going_down)
745{
0d143fe1 746 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 747 unsigned long flags;
748 struct sk_buff *skb, *tmp;
e8975581 749 u32 hw_reconf_flags = 0;
09f4114e 750 int i, flushed;
0d143fe1 751
c29acf20
RM		 752 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
753
e2fd5dbc 754 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 755 ieee80211_scan_cancel(local);
756
0d143fe1
JB		 757 /*
758 * Stop TX on this interface first.
759 */
f142c6b9
JB		 760 if (sdata->dev)
761 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 762
2eb278e0 763 ieee80211_roc_purge(sdata);
af6b6374 764
0d143fe1
JB		 765 /*
766 * Remove all stations associated with this interface.
767 *
768 * This must be done before calling ops->remove_interface()
769 * because otherwise we can later invoke ops->sta_notify()
770 * whenever the STAs are removed, and that invalidates driver
771 * assumptions about always getting a vif pointer that is valid
772 * (because if we remove a STA after ops->remove_interface()
773 * the driver will have removed the vif info already!)
774 *
09f4114e
JB		 775 * This is relevant only in WDS mode, in all other modes we've
776 * already removed all stations when disconnecting or similar,
777 * so warn otherwise.
051007d9
JB		 778 *
779 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 780 */
051007d9 781 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 782 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
783 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1
JB		 784
785 /*
786 * Don't count this interface for promisc/allmulti while it
787 * is down. dev_mc_unsync() will invoke set_multicast_list
788 * on the master interface which will sync these down to the
789 * hardware as filter flags.
790 */
791 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
792 atomic_dec(&local->iff_allmultis);
793
794 if (sdata->flags & IEEE80211_SDATA_PROMISC)
795 atomic_dec(&local->iff_promiscs);
796
7be5086d 797 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 798 local->fif_pspoll--;
7be5086d
JB		 799 local->fif_probe_req--;
800 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
801 local->fif_probe_req--;
802 }
e3b90ca2 803
f142c6b9
JB		 804 if (sdata->dev) {
805 netif_addr_lock_bh(sdata->dev);
806 spin_lock_bh(&local->filter_lock);
807 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
808 sdata->dev->addr_len);
809 spin_unlock_bh(&local->filter_lock);
810 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 811
f142c6b9
JB		 812 ieee80211_configure_filter(local);
813 }
3ac64bee 814
7cbf0ba5
VN		 815 del_timer_sync(&local->dynamic_ps_timer);
816 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 817
04ecd257
JB		 818 cancel_work_sync(&sdata->recalc_smps);
819
0d143fe1
JB		 820 /* APs need special treatment */
821 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 822 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 823
824 /* down all dependent devices, that is VLANs */
57c9fff3 825 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 826 u.vlan.list)
827 dev_close(vlan->dev);
828 WARN_ON(!list_empty(&sdata->u.ap.vlans));
afa762f6
EP		 829 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
830 ieee80211_mgd_stop(sdata);
0d143fe1
JB		 831 }
832
34d4bc4d
JB		 833 if (going_down)
834 local->open_count--;
0d143fe1
JB		 835
836 switch (sdata->vif.type) {
837 case NL80211_IFTYPE_AP_VLAN:
838 list_del(&sdata->u.vlan.list);
4d76d21b 839 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 840 /* no need to tell driver */
841 break;
842 case NL80211_IFTYPE_MONITOR:
843 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
844 local->cooked_mntrs--;
845 break;
846 }
847
848 local->monitors--;
e8975581 849 if (local->monitors == 0) {
0869aea0
JB		 850 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
851 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
075e0847 852 ieee80211_del_virtual_monitor(local);
e8975581 853 }
0d143fe1 854
85416a4f 855 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 856 ieee80211_configure_filter(local);
0d143fe1 857 break;
f142c6b9
JB		 858 case NL80211_IFTYPE_P2P_DEVICE:
859 /* relies on synchronize_rcu() below */
860 rcu_assign_pointer(local->p2p_sdata, NULL);
861 /* fall through */
0d143fe1 862 default:
0b7dff4f 863 cancel_work_sync(&sdata->work);
35f20c14
JB		 864 /*
865 * When we get here, the interface is marked down.
051007d9
JB		 866 * sta_info_flush_cleanup() calls rcu_barrier to
867 * wait for the station call_rcu() calls to complete,
868 * here we require it to wait for the RX path in case
869 * it is using the interface and enqueuing frames at
870 * this very time on another CPU.
35f20c14 871 */
051007d9
JB		 872 sta_info_flush_cleanup(sdata);
873
35f20c14
JB		 874 skb_queue_purge(&sdata->skb_queue);
875
b9dcf712
JB		 876 /*
877 * Free all remaining keys, there shouldn't be any,
878 * except maybe group keys in AP more or WDS?
879 */
ad0e2b5a 880 ieee80211_free_keys(sdata);
b9dcf712 881
34d4bc4d 882 if (going_down)
7b7eab6f 883 drv_remove_interface(local, sdata);
0d143fe1
JB		 884 }
885
886 sdata->bss = NULL;
887
7da7cc1d 888 mutex_lock(&local->mtx);
5cff20e6 889 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 890 mutex_unlock(&local->mtx);
5cff20e6
JB		 891
892 ieee80211_recalc_ps(local, -1);
893
0d143fe1 894 if (local->open_count == 0) {
4e6cbfd0
JL		 895 if (local->ops->napi_poll)
896 napi_disable(&local->napi);
ea77f12f 897 ieee80211_clear_tx_pending(local);
84f6a01c 898 ieee80211_stop_device(local);
0d143fe1 899
e8975581
JB		 900 /* no reconfiguring after stop! */
901 hw_reconf_flags = 0;
0d143fe1
JB		 902 }
903
e8975581 904 /* do after stop to avoid reconfiguring when we stop anyway */
55de908a 905 if (hw_reconf_flags)
e8975581
JB		 906 ieee80211_hw_config(local, hw_reconf_flags);
907
5061b0c2
JB		 908 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
909 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
910 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
911 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
912 if (info->control.vif == &sdata->vif) {
913 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 914 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 915 }
916 }
917 }
918 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847
JB		 919
920 if (local->monitors == local->open_count && local->monitors > 0)
921 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 922}
923
924static int ieee80211_stop(struct net_device *dev)
925{
926 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
927
928 ieee80211_do_stop(sdata, true);
5061b0c2 929
0d143fe1
JB		 930 return 0;
931}
932
933static void ieee80211_set_multicast_list(struct net_device *dev)
934{
0d143fe1 935 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 936 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 937 int allmulti, promisc, sdata_allmulti, sdata_promisc;
938
939 allmulti = !!(dev->flags & IFF_ALLMULTI);
940 promisc = !!(dev->flags & IFF_PROMISC);
941 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
942 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
943
944 if (allmulti != sdata_allmulti) {
945 if (dev->flags & IFF_ALLMULTI)
946 atomic_inc(&local->iff_allmultis);
947 else
948 atomic_dec(&local->iff_allmultis);
949 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
950 }
951
952 if (promisc != sdata_promisc) {
953 if (dev->flags & IFF_PROMISC)
954 atomic_inc(&local->iff_promiscs);
955 else
956 atomic_dec(&local->iff_promiscs);
957 sdata->flags ^= IEEE80211_SDATA_PROMISC;
958 }
3b8d81e0 959 spin_lock_bh(&local->filter_lock);
22bedad3 960 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 961 spin_unlock_bh(&local->filter_lock);
3ac64bee 962 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 963}
964
75636525
JB		 965/*
966 * Called when the netdev is removed or, by the code below, before
967 * the interface type changes.
968 */
f142c6b9 969static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 970{
75636525 971 int flushed;
f0706e82
JB		 972 int i;
973
75636525
JB		 974 /* free extra data */
975 ieee80211_free_keys(sdata);
976
aee14ceb
JM		 977 ieee80211_debugfs_remove_netdev(sdata);
978
f0706e82 979 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 980 __skb_queue_purge(&sdata->fragments[i].skb_list);
981 sdata->fragment_next = 0;
11a843b7 982
b9dcf712
JB		 983 if (ieee80211_vif_is_mesh(&sdata->vif))
984 mesh_rmc_free(sdata);
75636525 985
b998e8bb 986 flushed = sta_info_flush(sdata);
75636525 987 WARN_ON(flushed);
f0706e82
JB		 988}
989
f142c6b9
JB		 990static void ieee80211_uninit(struct net_device *dev)
991{
992 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
993}
994
cf0277e7
JB		 995static u16 ieee80211_netdev_select_queue(struct net_device *dev,
996 struct sk_buff *skb)
997{
998 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
999}
1000
587e729e
JB		 1001static const struct net_device_ops ieee80211_dataif_ops = {
1002 .ndo_open = ieee80211_open,
1003 .ndo_stop = ieee80211_stop,
f142c6b9 1004 .ndo_uninit = ieee80211_uninit,
587e729e 1005 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1006 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1007 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1008 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1009 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1010};
1011
cf0277e7
JB		 1012static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1013 struct sk_buff *skb)
1014{
1015 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1016 struct ieee80211_local *local = sdata->local;
1017 struct ieee80211_hdr *hdr;
1018 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1019
32c5057b 1020 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1021 return 0;
1022
1023 if (skb->len < 4 ||
b49bb574 1024 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1025 return 0; /* doesn't matter, frame will be dropped */
1026
b49bb574 1027 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1028
00e96dec 1029 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1030}
1031
587e729e
JB		 1032static const struct net_device_ops ieee80211_monitorif_ops = {
1033 .ndo_open = ieee80211_open,
1034 .ndo_stop = ieee80211_stop,
f142c6b9 1035 .ndo_uninit = ieee80211_uninit,
587e729e 1036 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1037 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1038 .ndo_change_mtu = ieee80211_change_mtu,
1039 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1040 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1041};
1042
1043static void ieee80211_if_setup(struct net_device *dev)
1044{
1045 ether_setup(dev);
550fd08c 1046 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1047 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1048 dev->destructor = free_netdev;
1049}
1050
1fa57d01
JB		 1051static void ieee80211_iface_work(struct work_struct *work)
1052{
1053 struct ieee80211_sub_if_data *sdata =
1054 container_of(work, struct ieee80211_sub_if_data, work);
1055 struct ieee80211_local *local = sdata->local;
1056 struct sk_buff *skb;
344eec67 1057 struct sta_info *sta;
c1475ca9 1058 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1059
1060 if (!ieee80211_sdata_running(sdata))
1061 return;
1062
1063 if (local->scanning)
1064 return;
1065
1066 /*
1067 * ieee80211_queue_work() should have picked up most cases,
1068 * here we'll pick the rest.
1069 */
1070 if (WARN(local->suspended,
1071 "interface work scheduled while going to suspend\n"))
1072 return;
1073
1074 /* first process frames */
1075 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1076 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1077
c1475ca9
JB		 1078 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1079 ra_tid = (void *)&skb->cb;
1080 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1081 ra_tid->tid);
1082 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1083 ra_tid = (void *)&skb->cb;
1084 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1085 ra_tid->tid);
1086 } else if (ieee80211_is_action(mgmt->frame_control) &&
1087 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1088 int len = skb->len;
bed7ee6e 1089
a93e3644 1090 mutex_lock(&local->sta_mtx);
875ae5f6 1091 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1092 if (sta) {
1093 switch (mgmt->u.action.u.addba_req.action_code) {
1094 case WLAN_ACTION_ADDBA_REQ:
1095 ieee80211_process_addba_request(
1096 local, sta, mgmt, len);
1097 break;
1098 case WLAN_ACTION_ADDBA_RESP:
1099 ieee80211_process_addba_resp(local, sta,
1100 mgmt, len);
1101 break;
1102 case WLAN_ACTION_DELBA:
1103 ieee80211_process_delba(sdata, sta,
1104 mgmt, len);
1105 break;
1106 default:
1107 WARN_ON(1);
1108 break;
1109 }
1110 }
a93e3644 1111 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1112 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1113 struct ieee80211_hdr *hdr = (void *)mgmt;
1114 /*
1115 * So the frame isn't mgmt, but frame_control
1116 * is at the right place anyway, of course, so
1117 * the if statement is correct.
1118 *
1119 * Warn if we have other data frame types here,
1120 * they must not get here.
1121 */
1122 WARN_ON(hdr->frame_control &
1123 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1124 WARN_ON(!(hdr->seq_ctrl &
1125 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1126 /*
1127 * This was a fragment of a frame, received while
1128 * a block-ack session was active. That cannot be
1129 * right, so terminate the session.
1130 */
a93e3644 1131 mutex_lock(&local->sta_mtx);
875ae5f6 1132 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1133 if (sta) {
1134 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1135 IEEE80211_QOS_CTL_TID_MASK;
1136
1137 __ieee80211_stop_rx_ba_session(
1138 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1139 WLAN_REASON_QSTA_REQUIRE_SETUP,
1140 true);
344eec67 1141 }
a93e3644 1142 mutex_unlock(&local->sta_mtx);
bed7ee6e 1143 } else switch (sdata->vif.type) {
1fa57d01
JB		 1144 case NL80211_IFTYPE_STATION:
1145 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1146 break;
1147 case NL80211_IFTYPE_ADHOC:
1148 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1149 break;
1150 case NL80211_IFTYPE_MESH_POINT:
1151 if (!ieee80211_vif_is_mesh(&sdata->vif))
1152 break;
1153 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1154 break;
1155 default:
1156 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1157 break;
1158 }
36b3a628
JB		 1159
1160 kfree_skb(skb);
1fa57d01
JB		 1161 }
1162
1163 /* then other type-dependent work */
1164 switch (sdata->vif.type) {
1165 case NL80211_IFTYPE_STATION:
1166 ieee80211_sta_work(sdata);
1167 break;
1168 case NL80211_IFTYPE_ADHOC:
1169 ieee80211_ibss_work(sdata);
1170 break;
1171 case NL80211_IFTYPE_MESH_POINT:
1172 if (!ieee80211_vif_is_mesh(&sdata->vif))
1173 break;
1174 ieee80211_mesh_work(sdata);
1175 break;
1176 default:
1177 break;
1178 }
1179}
1180
04ecd257
JB		 1181static void ieee80211_recalc_smps_work(struct work_struct *work)
1182{
1183 struct ieee80211_sub_if_data *sdata =
1184 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1185
1186 ieee80211_recalc_smps(sdata);
1187}
1fa57d01 1188
75636525
JB		 1189/*
1190 * Helper function to initialise an interface to a specific type.
1191 */
1192static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1193 enum nl80211_iftype type)
f0706e82 1194{
75636525
JB		 1195 /* clear type-dependent union */
1196 memset(&sdata->u, 0, sizeof(sdata->u));
1197
1198 /* and set some type-dependent values */
1199 sdata->vif.type = type;
2ca27bcf 1200 sdata->vif.p2p = false;
60719ffd 1201 sdata->wdev.iftype = type;
75636525 1202
a621fa4d
JB		 1203 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1204 sdata->control_port_no_encrypt = false;
1205
b53be792
SW		 1206 sdata->noack_map = 0;
1207
f142c6b9
JB		 1208 /* only monitor/p2p-device differ */
1209 if (sdata->dev) {
1210 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1211 sdata->dev->type = ARPHRD_ETHER;
1212 }
75636525 1213
35f20c14 1214 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1215 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1216 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1217
75636525 1218 switch (type) {
2ca27bcf
JB		 1219 case NL80211_IFTYPE_P2P_GO:
1220 type = NL80211_IFTYPE_AP;
1221 sdata->vif.type = type;
1222 sdata->vif.p2p = true;
1223 /* fall through */
05c914fe 1224 case NL80211_IFTYPE_AP:
d012a605 1225 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525
JB		 1226 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1227 break;
2ca27bcf
JB		 1228 case NL80211_IFTYPE_P2P_CLIENT:
1229 type = NL80211_IFTYPE_STATION;
1230 sdata->vif.type = type;
1231 sdata->vif.p2p = true;
1232 /* fall through */
05c914fe 1233 case NL80211_IFTYPE_STATION:
9c6bd790 1234 ieee80211_sta_setup_sdata(sdata);
472dbc45 1235 break;
46900298
JB		 1236 case NL80211_IFTYPE_ADHOC:
1237 ieee80211_ibss_setup_sdata(sdata);
1238 break;
05c914fe 1239 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1240 if (ieee80211_vif_is_mesh(&sdata->vif))
1241 ieee80211_mesh_init_sdata(sdata);
1242 break;
05c914fe 1243 case NL80211_IFTYPE_MONITOR:
75636525 1244 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1245 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1246 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1247 MONITOR_FLAG_OTHER_BSS;
1248 break;
05c914fe
JB		 1249 case NL80211_IFTYPE_WDS:
1250 case NL80211_IFTYPE_AP_VLAN:
98104fde 1251 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9 1252 break;
05c914fe 1253 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1254 case NUM_NL80211_IFTYPES:
75636525
JB		 1255 BUG();
1256 break;
1257 }
1258
1259 ieee80211_debugfs_add_netdev(sdata);
1260}
1261
34d4bc4d
JB		 1262static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1263 enum nl80211_iftype type)
1264{
1265 struct ieee80211_local *local = sdata->local;
1266 int ret, err;
2ca27bcf
JB		 1267 enum nl80211_iftype internal_type = type;
1268 bool p2p = false;
34d4bc4d
JB		 1269
1270 ASSERT_RTNL();
1271
1272 if (!local->ops->change_interface)
1273 return -EBUSY;
1274
1275 switch (sdata->vif.type) {
1276 case NL80211_IFTYPE_AP:
1277 case NL80211_IFTYPE_STATION:
1278 case NL80211_IFTYPE_ADHOC:
1279 /*
1280 * Could maybe also all others here?
1281 * Just not sure how that interacts
1282 * with the RX/config path e.g. for
1283 * mesh.
1284 */
1285 break;
1286 default:
1287 return -EBUSY;
1288 }
1289
1290 switch (type) {
1291 case NL80211_IFTYPE_AP:
1292 case NL80211_IFTYPE_STATION:
1293 case NL80211_IFTYPE_ADHOC:
1294 /*
1295 * Could probably support everything
1296 * but WDS here (WDS do_open can fail
1297 * under memory pressure, which this
1298 * code isn't prepared to handle).
1299 */
1300 break;
2ca27bcf
JB		 1301 case NL80211_IFTYPE_P2P_CLIENT:
1302 p2p = true;
1303 internal_type = NL80211_IFTYPE_STATION;
1304 break;
1305 case NL80211_IFTYPE_P2P_GO:
1306 p2p = true;
1307 internal_type = NL80211_IFTYPE_AP;
1308 break;
34d4bc4d
JB		 1309 default:
1310 return -EBUSY;
1311 }
1312
2ca27bcf 1313 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1314 if (ret)
1315 return ret;
1316
1317 ieee80211_do_stop(sdata, false);
1318
f142c6b9 1319 ieee80211_teardown_sdata(sdata);
34d4bc4d 1320
2ca27bcf 1321 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1322 if (ret)
1323 type = sdata->vif.type;
1324
3a25a8c8
JB		 1325 /*
1326 * Ignore return value here, there's not much we can do since
1327 * the driver changed the interface type internally already.
1328 * The warnings will hopefully make driver authors fix it :-)
1329 */
1330 ieee80211_check_queues(sdata);
1331
34d4bc4d
JB		 1332 ieee80211_setup_sdata(sdata, type);
1333
f142c6b9 1334 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1335 WARN(err, "type change: do_open returned %d", err);
1336
1337 return ret;
1338}
1339
f3947e2d 1340int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1341 enum nl80211_iftype type)
75636525 1342{
34d4bc4d
JB		 1343 int ret;
1344
f3947e2d
JB		 1345 ASSERT_RTNL();
1346
2ca27bcf 1347 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1348 return 0;
1349
34d4bc4d
JB		 1350 if (ieee80211_sdata_running(sdata)) {
1351 ret = ieee80211_runtime_change_iftype(sdata, type);
1352 if (ret)
1353 return ret;
1354 } else {
1355 /* Purge and reset type-dependent state. */
f142c6b9 1356 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1357 ieee80211_setup_sdata(sdata, type);
1358 }
75636525
JB		 1359
1360 /* reset some values that shouldn't be kept across type changes */
75636525 1361 sdata->drop_unencrypted = 0;
9bc383de
JB		 1362 if (type == NL80211_IFTYPE_STATION)
1363 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1364
1365 return 0;
f0706e82
JB		 1366}
1367
fa9029f8 1368static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1369 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1370{
1371 struct ieee80211_sub_if_data *sdata;
1372 u64 mask, start, addr, val, inc;
1373 u8 *m;
1374 u8 tmp_addr[ETH_ALEN];
1375 int i;
1376
1377 /* default ... something at least */
f142c6b9 1378 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1379
1380 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1381 local->hw.wiphy->n_addresses <= 1)
1382 return;
1383
fa9029f8
JB		 1384 mutex_lock(&local->iflist_mtx);
1385
1386 switch (type) {
1387 case NL80211_IFTYPE_MONITOR:
1388 /* doesn't matter */
1389 break;
1390 case NL80211_IFTYPE_WDS:
1391 case NL80211_IFTYPE_AP_VLAN:
1392 /* match up with an AP interface */
1393 list_for_each_entry(sdata, &local->interfaces, list) {
1394 if (sdata->vif.type != NL80211_IFTYPE_AP)
1395 continue;
f142c6b9 1396 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1397 break;
1398 }
1399 /* keep default if no AP interface present */
1400 break;
6d71117a
JB		 1401 case NL80211_IFTYPE_P2P_CLIENT:
1402 case NL80211_IFTYPE_P2P_GO:
1403 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1404 list_for_each_entry(sdata, &local->interfaces, list) {
1405 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1406 continue;
1407 if (!ieee80211_sdata_running(sdata))
1408 continue;
1409 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1410 goto out_unlock;
1411 }
1412 }
1413 /* otherwise fall through */
fa9029f8
JB		 1414 default:
1415 /* assign a new address if possible -- try n_addresses first */
1416 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1417 bool used = false;
1418
1419 list_for_each_entry(sdata, &local->interfaces, list) {
1420 if (memcmp(local->hw.wiphy->addresses[i].addr,
1421 sdata->vif.addr, ETH_ALEN) == 0) {
1422 used = true;
1423 break;
1424 }
1425 }
1426
1427 if (!used) {
f142c6b9 1428 memcpy(perm_addr,
fa9029f8
JB		 1429 local->hw.wiphy->addresses[i].addr,
1430 ETH_ALEN);
1431 break;
1432 }
1433 }
1434
1435 /* try mask if available */
1436 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1437 break;
1438
1439 m = local->hw.wiphy->addr_mask;
1440 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1441 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1442 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1443
1444 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1445 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1446 pr_info("not contiguous\n");
fa9029f8
JB		 1447 break;
1448 }
1449
1450 m = local->hw.wiphy->perm_addr;
1451 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1452 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1453 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1454
1455 inc = 1ULL<<__ffs64(mask);
1456 val = (start & mask);
1457 addr = (start & ~mask) | (val & mask);
1458 do {
1459 bool used = false;
1460
1461 tmp_addr[5] = addr >> 0*8;
1462 tmp_addr[4] = addr >> 1*8;
1463 tmp_addr[3] = addr >> 2*8;
1464 tmp_addr[2] = addr >> 3*8;
1465 tmp_addr[1] = addr >> 4*8;
1466 tmp_addr[0] = addr >> 5*8;
1467
1468 val += inc;
1469
1470 list_for_each_entry(sdata, &local->interfaces, list) {
1471 if (memcmp(tmp_addr, sdata->vif.addr,
1472 ETH_ALEN) == 0) {
1473 used = true;
1474 break;
1475 }
1476 }
1477
1478 if (!used) {
f142c6b9 1479 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1480 break;
1481 }
1482 addr = (start & ~mask) | (val & mask);
1483 } while (addr != start);
1484
1485 break;
1486 }
1487
6d71117a 1488 out_unlock:
fa9029f8
JB		 1489 mutex_unlock(&local->iflist_mtx);
1490}
1491
97f97b1f
JB		 1492static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1493{
1494 struct ieee80211_sub_if_data *sdata;
1495
1496 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1497
1498 ieee80211_cleanup_sdata_stas(sdata);
1499}
1500
3e122be0 1501int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1502 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1503 struct vif_params *params)
f0706e82 1504{
f142c6b9 1505 struct net_device *ndev = NULL;
f0706e82 1506 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1507 int ret, i;
ded81f6b 1508 int txqs = 1;
f0706e82
JB		 1509
1510 ASSERT_RTNL();
75636525 1511
f142c6b9
JB		 1512 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1513 struct wireless_dev *wdev;
1514
1515 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1516 GFP_KERNEL);
1517 if (!sdata)
1518 return -ENOMEM;
1519 wdev = &sdata->wdev;
1520
1521 sdata->dev = NULL;
1522 strlcpy(sdata->name, name, IFNAMSIZ);
1523 ieee80211_assign_perm_addr(local, wdev->address, type);
1524 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1525 } else {
1526 if (local->hw.queues >= IEEE80211_NUM_ACS)
1527 txqs = IEEE80211_NUM_ACS;
1528
1529 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1530 local->hw.vif_data_size,
1531 name, ieee80211_if_setup, txqs, 1);
1532 if (!ndev)
1533 return -ENOMEM;
1534 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1535
1536 ndev->needed_headroom = local->tx_headroom +
1537 4*6 /* four MAC addresses */
1538 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1539 + 6 /* mesh */
1540 + 8 /* rfc1042/bridge tunnel */
1541 - ETH_HLEN /* ethernet hard_header_len */
1542 + IEEE80211_ENCRYPT_HEADROOM;
1543 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1544
1545 ret = dev_alloc_name(ndev, ndev->name);
1546 if (ret < 0) {
1547 free_netdev(ndev);
1548 return ret;
1549 }
1550
1551 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1552 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1553 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1554
1555 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1556 sdata = netdev_priv(ndev);
1557 ndev->ieee80211_ptr = &sdata->wdev;
1558 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1559 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1560
1561 sdata->dev = ndev;
1562 }
75636525
JB		 1563
1564 /* initialise type-independent data */
f0706e82 1565 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1566 sdata->local = local;
68542962
JO		 1567#ifdef CONFIG_INET
1568 sdata->arp_filter_state = true;
1569#endif
75636525
JB		 1570
1571 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1572 skb_queue_head_init(&sdata->fragments[i].skb_list);
1573
1574 INIT_LIST_HEAD(&sdata->key_list);
1575
97f97b1f
JB		 1576 spin_lock_init(&sdata->cleanup_stations_lock);
1577 INIT_LIST_HEAD(&sdata->cleanup_stations);
1578 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1579
37eb0b16
JM		 1580 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1581 struct ieee80211_supported_band *sband;
1582 sband = local->hw.wiphy->bands[i];
1583 sdata->rc_rateidx_mask[i] =
1584 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1585 if (sband)
1586 memcpy(sdata->rc_rateidx_mcs_mask[i],
1587 sband->ht_cap.mcs.rx_mask,
1588 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1589 else
1590 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1591 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1592 }
75636525 1593
3a25a8c8
JB		 1594 ieee80211_set_default_queues(sdata);
1595
1ea6f9c0
JB		 1596 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1597 sdata->user_power_level = local->user_power_level;
1598
75636525
JB		 1599 /* setup type-dependent data */
1600 ieee80211_setup_sdata(sdata, type);
f0706e82 1601
f142c6b9
JB		 1602 if (ndev) {
1603 if (params) {
1604 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1605 if (type == NL80211_IFTYPE_STATION)
1606 sdata->u.mgd.use_4addr = params->use_4addr;
1607 }
9bc383de 1608
f142c6b9 1609 ndev->features |= local->hw.netdev_features;
72d78728 1610
f142c6b9
JB		 1611 ret = register_netdevice(ndev);
1612 if (ret) {
1613 free_netdev(ndev);
1614 return ret;
1615 }
1616 }
f0706e82 1617
c771c9d8 1618 mutex_lock(&local->iflist_mtx);
79010420 1619 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1620 mutex_unlock(&local->iflist_mtx);
79010420 1621
84efbb84
JB		 1622 if (new_wdev)
1623 *new_wdev = &sdata->wdev;
f0706e82 1624
f0706e82 1625 return 0;
f0706e82
JB		 1626}
1627
f698d856 1628void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1629{
f0706e82 1630 ASSERT_RTNL();
11a843b7 1631
c771c9d8 1632 mutex_lock(&sdata->local->iflist_mtx);
75636525 1633 list_del_rcu(&sdata->list);
c771c9d8
JB		 1634 mutex_unlock(&sdata->local->iflist_mtx);
1635
75636525 1636 synchronize_rcu();
f142c6b9
JB		 1637
1638 if (sdata->dev) {
1639 unregister_netdevice(sdata->dev);
1640 } else {
1641 cfg80211_unregister_wdev(&sdata->wdev);
1642 kfree(sdata);
1643 }
1644}
1645
1646void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1647{
1648 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1649 return;
1650 ieee80211_do_stop(sdata, true);
1651 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1652}
1653
75636525
JB		 1654/*
1655 * Remove all interfaces, may only be called at hardware unregistration
1656 * time because it doesn't do RCU-safe list removals.
1657 */
1658void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1659{
75636525 1660 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1661 LIST_HEAD(unreg_list);
f142c6b9 1662 LIST_HEAD(wdev_list);
f0706e82
JB		 1663
1664 ASSERT_RTNL();
1665
efe117ab 1666 mutex_lock(&local->iflist_mtx);
75636525
JB		 1667 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1668 list_del(&sdata->list);
c771c9d8 1669
f142c6b9
JB		 1670 if (sdata->dev)
1671 unregister_netdevice_queue(sdata->dev, &unreg_list);
1672 else
1673 list_add(&sdata->list, &wdev_list);
f0706e82 1674 }
efe117ab
ED		 1675 mutex_unlock(&local->iflist_mtx);
1676 unregister_netdevice_many(&unreg_list);
5f04d506 1677 list_del(&unreg_list);
f142c6b9
JB		 1678
1679 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1680 list_del(&sdata->list);
1681 cfg80211_unregister_wdev(&sdata->wdev);
1682 kfree(sdata);
1683 }
f0706e82 1684}
5cff20e6 1685
47846c9b
JB		 1686static int netdev_notify(struct notifier_block *nb,
1687 unsigned long state,
1688 void *ndev)
1689{
1690 struct net_device *dev = ndev;
1691 struct ieee80211_sub_if_data *sdata;
1692
1693 if (state != NETDEV_CHANGENAME)
1694 return 0;
1695
1696 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1697 return 0;
1698
1699 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1700 return 0;
1701
1702 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1703
2f5265e6 1704 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1705
1706 ieee80211_debugfs_rename_netdev(sdata);
1707 return 0;
1708}
1709
1710static struct notifier_block mac80211_netdev_notifier = {
1711 .notifier_call = netdev_notify,
1712};
1713
1714int ieee80211_iface_init(void)
1715{
1716 return register_netdevice_notifier(&mac80211_netdev_notifier);
1717}
1718
1719void ieee80211_iface_exit(void)
1720{
1721 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1722}
Linux 6.x block layer and io_uring tree(s)