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cfg80211: add correct docbook entries
[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
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
fd0f979a 110 active = !list_empty(&local->chanctx_list);
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;
4e6cbfd0
JL		 488 if (local->ops->napi_poll)
489 napi_enable(&local->napi);
e8975581
JB		 490 /* we're brought up, everything changes */
491 hw_reconf_flags = ~0;
1f87f7d3 492 ieee80211_led_radio(local, true);
67408c8c
JB		 493 ieee80211_mod_tpt_led_trig(local,
494 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 495 }
496
497 /*
bf533e0b
JB		 498 * Copy the hopefully now-present MAC address to
499 * this interface, if it has the special null one.
0d143fe1 500 */
f142c6b9 501 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 502 memcpy(dev->dev_addr,
503 local->hw.wiphy->perm_addr,
504 ETH_ALEN);
505 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
506
507 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 508 res = -EADDRNOTAVAIL;
509 goto err_stop;
0adc23f5 510 }
0d143fe1
JB		 511 }
512
0d143fe1
JB		 513 switch (sdata->vif.type) {
514 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 515 /* no need to tell driver, but set carrier and chanctx */
516 if (rtnl_dereference(sdata->bss->beacon)) {
517 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 518 netif_carrier_on(dev);
4d76d21b 519 } else {
3edaf3e6 520 netif_carrier_off(dev);
4d76d21b 521 }
0d143fe1
JB		 522 break;
523 case NL80211_IFTYPE_MONITOR:
524 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
525 local->cooked_mntrs++;
526 break;
527 }
528
075e0847
JB		 529 if (local->monitors == 0 && local->open_count == 0) {
530 res = ieee80211_add_virtual_monitor(local);
531 if (res)
532 goto err_stop;
533 }
534
0d143fe1
JB		 535 /* must be before the call to ieee80211_configure_filter */
536 local->monitors++;
e8975581 537 if (local->monitors == 1) {
0869aea0
JB		 538 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
539 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 540 }
0d143fe1 541
85416a4f 542 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 543 ieee80211_configure_filter(local);
53e9b1de
DG		 544
545 netif_carrier_on(dev);
0d143fe1 546 break;
0d143fe1 547 default:
34d4bc4d 548 if (coming_up) {
075e0847
JB		 549 ieee80211_del_virtual_monitor(local);
550
7b7eab6f 551 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 552 if (res)
553 goto err_stop;
3a25a8c8
JB		 554 res = ieee80211_check_queues(sdata);
555 if (res)
556 goto err_del_interface;
34d4bc4d 557 }
0d143fe1 558
b207cdb0
AB		 559 drv_add_interface_debugfs(local, sdata);
560
29cbe68c 561 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 562 local->fif_pspoll++;
7be5086d 563 local->fif_probe_req++;
e3b90ca2 564
e3b90ca2 565 ieee80211_configure_filter(local);
7be5086d
JB		 566 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
567 local->fif_probe_req++;
a3c9aa51 568 }
e3b90ca2 569
f142c6b9
JB		 570 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
571 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 572 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 573
c405c629
JB		 574 switch (sdata->vif.type) {
575 case NL80211_IFTYPE_STATION:
576 case NL80211_IFTYPE_ADHOC:
577 case NL80211_IFTYPE_AP:
578 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 579 netif_carrier_off(dev);
c405c629 580 break;
1411af15 581 case NL80211_IFTYPE_WDS:
f142c6b9 582 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 583 break;
c405c629 584 default:
0d143fe1 585 netif_carrier_on(dev);
c405c629 586 }
59034591
EP		 587
588 /*
589 * set default queue parameters so drivers don't
590 * need to initialise the hardware if the hardware
591 * doesn't start up with sane defaults
592 */
3abead59 593 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 594 }
595
2d2080c3
JB		 596 set_bit(SDATA_STATE_RUNNING, &sdata->state);
597
0d143fe1
JB		 598 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
599 /* Create STA entry for the WDS peer */
600 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
601 GFP_KERNEL);
602 if (!sta) {
603 res = -ENOMEM;
604 goto err_del_interface;
605 }
606
83d5cc01
JB		 607 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
608 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
609 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 610
611 res = sta_info_insert(sta);
612 if (res) {
613 /* STA has been freed */
614 goto err_del_interface;
615 }
1be7fe8d
BJ		 616
617 rate_control_rate_init(sta);
1411af15 618 netif_carrier_on(dev);
f142c6b9
JB		 619 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
620 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 621 }
622
0d143fe1
JB		 623 /*
624 * set_multicast_list will be invoked by the networking core
625 * which will check whether any increments here were done in
626 * error and sync them down to the hardware as filter flags.
627 */
628 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
629 atomic_inc(&local->iff_allmultis);
630
631 if (sdata->flags & IEEE80211_SDATA_PROMISC)
632 atomic_inc(&local->iff_promiscs);
633
34d4bc4d
JB		 634 if (coming_up)
635 local->open_count++;
636
59034591 637 if (hw_reconf_flags)
e8975581 638 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 639
10f644a4 640 ieee80211_recalc_ps(local, -1);
965bedad 641
f142c6b9
JB		 642 if (dev)
643 netif_tx_start_all_queues(dev);
0d143fe1
JB		 644
645 return 0;
646 err_del_interface:
7b7eab6f 647 drv_remove_interface(local, sdata);
0d143fe1 648 err_stop:
24487981
JB		 649 if (!local->open_count)
650 drv_stop(local);
0d143fe1
JB		 651 err_del_bss:
652 sdata->bss = NULL;
653 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
654 list_del(&sdata->u.vlan.list);
4d6c36fa 655 /* might already be clear but that doesn't matter */
2d2080c3 656 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 657 return res;
658}
659
34d4bc4d 660static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 661{
662 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 663 int err;
664
665 /* fail early if user set an invalid address */
2fcf2824 666 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 667 return -EADDRNOTAVAIL;
668
669 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
670 if (err)
671 return err;
672
f142c6b9 673 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 674}
675
676static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
677 bool going_down)
678{
0d143fe1 679 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 680 unsigned long flags;
681 struct sk_buff *skb, *tmp;
e8975581 682 u32 hw_reconf_flags = 0;
09f4114e 683 int i, flushed;
397a7a24 684 struct ps_data *ps;
0d143fe1 685
c29acf20
RM		 686 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
687
e2fd5dbc 688 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 689 ieee80211_scan_cancel(local);
690
0d143fe1
JB		 691 /*
692 * Stop TX on this interface first.
693 */
f142c6b9
JB		 694 if (sdata->dev)
695 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 696
2eb278e0 697 ieee80211_roc_purge(sdata);
af6b6374 698
0d143fe1
JB		 699 /*
700 * Remove all stations associated with this interface.
701 *
702 * This must be done before calling ops->remove_interface()
703 * because otherwise we can later invoke ops->sta_notify()
704 * whenever the STAs are removed, and that invalidates driver
705 * assumptions about always getting a vif pointer that is valid
706 * (because if we remove a STA after ops->remove_interface()
707 * the driver will have removed the vif info already!)
708 *
09f4114e
JB		 709 * This is relevant only in WDS mode, in all other modes we've
710 * already removed all stations when disconnecting or similar,
711 * so warn otherwise.
051007d9
JB		 712 *
713 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 714 */
051007d9 715 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 716 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
717 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1
JB		 718
719 /*
720 * Don't count this interface for promisc/allmulti while it
721 * is down. dev_mc_unsync() will invoke set_multicast_list
722 * on the master interface which will sync these down to the
723 * hardware as filter flags.
724 */
725 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
726 atomic_dec(&local->iff_allmultis);
727
728 if (sdata->flags & IEEE80211_SDATA_PROMISC)
729 atomic_dec(&local->iff_promiscs);
730
7be5086d 731 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 732 local->fif_pspoll--;
7be5086d
JB		 733 local->fif_probe_req--;
734 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
735 local->fif_probe_req--;
736 }
e3b90ca2 737
f142c6b9
JB		 738 if (sdata->dev) {
739 netif_addr_lock_bh(sdata->dev);
740 spin_lock_bh(&local->filter_lock);
741 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
742 sdata->dev->addr_len);
743 spin_unlock_bh(&local->filter_lock);
744 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 745
f142c6b9
JB		 746 ieee80211_configure_filter(local);
747 }
3ac64bee 748
7cbf0ba5
VN		 749 del_timer_sync(&local->dynamic_ps_timer);
750 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 751
04ecd257
JB		 752 cancel_work_sync(&sdata->recalc_smps);
753
164eb02d
SW		 754 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
755
756 if (sdata->wdev.cac_started) {
757 mutex_lock(&local->iflist_mtx);
758 ieee80211_vif_release_channel(sdata);
759 mutex_unlock(&local->iflist_mtx);
760 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
761 GFP_KERNEL);
762 }
763
0d143fe1
JB		 764 /* APs need special treatment */
765 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 766 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 767
768 /* down all dependent devices, that is VLANs */
57c9fff3 769 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 770 u.vlan.list)
771 dev_close(vlan->dev);
772 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 773 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
774 /* remove all packets in parent bc_buf pointing to this dev */
775 ps = &sdata->bss->ps;
776
777 spin_lock_irqsave(&ps->bc_buf.lock, flags);
778 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
779 if (skb->dev == sdata->dev) {
780 __skb_unlink(skb, &ps->bc_buf);
781 local->total_ps_buffered--;
782 ieee80211_free_txskb(&local->hw, skb);
783 }
784 }
785 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
afa762f6
EP		 786 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
787 ieee80211_mgd_stop(sdata);
0d143fe1
JB		 788 }
789
34d4bc4d
JB		 790 if (going_down)
791 local->open_count--;
0d143fe1
JB		 792
793 switch (sdata->vif.type) {
794 case NL80211_IFTYPE_AP_VLAN:
795 list_del(&sdata->u.vlan.list);
4d76d21b 796 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 797 /* no need to tell driver */
798 break;
799 case NL80211_IFTYPE_MONITOR:
800 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
801 local->cooked_mntrs--;
802 break;
803 }
804
805 local->monitors--;
e8975581 806 if (local->monitors == 0) {
0869aea0
JB		 807 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
808 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
075e0847 809 ieee80211_del_virtual_monitor(local);
e8975581 810 }
0d143fe1 811
85416a4f 812 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 813 ieee80211_configure_filter(local);
0d143fe1 814 break;
f142c6b9
JB		 815 case NL80211_IFTYPE_P2P_DEVICE:
816 /* relies on synchronize_rcu() below */
817 rcu_assign_pointer(local->p2p_sdata, NULL);
818 /* fall through */
0d143fe1 819 default:
0b7dff4f 820 cancel_work_sync(&sdata->work);
35f20c14
JB		 821 /*
822 * When we get here, the interface is marked down.
75de9113
JB		 823 *
824 * sta_info_flush_cleanup() requires rcu_barrier()
825 * first to wait for the station call_rcu() calls
826 * to complete, here we need at least sychronize_rcu()
827 * it to wait for the RX path in case it is using the
828 * interface and enqueuing frames at this very time on
829 * another CPU.
35f20c14 830 */
75de9113 831 rcu_barrier();
051007d9
JB		 832 sta_info_flush_cleanup(sdata);
833
35f20c14
JB		 834 skb_queue_purge(&sdata->skb_queue);
835
b9dcf712
JB		 836 /*
837 * Free all remaining keys, there shouldn't be any,
838 * except maybe group keys in AP more or WDS?
839 */
ad0e2b5a 840 ieee80211_free_keys(sdata);
b9dcf712 841
b207cdb0
AB		 842 drv_remove_interface_debugfs(local, sdata);
843
34d4bc4d 844 if (going_down)
7b7eab6f 845 drv_remove_interface(local, sdata);
0d143fe1
JB		 846 }
847
848 sdata->bss = NULL;
849
5cff20e6
JB		 850 ieee80211_recalc_ps(local, -1);
851
0d143fe1 852 if (local->open_count == 0) {
4e6cbfd0
JL		 853 if (local->ops->napi_poll)
854 napi_disable(&local->napi);
ea77f12f 855 ieee80211_clear_tx_pending(local);
84f6a01c 856 ieee80211_stop_device(local);
0d143fe1 857
e8975581
JB		 858 /* no reconfiguring after stop! */
859 hw_reconf_flags = 0;
0d143fe1
JB		 860 }
861
e8975581 862 /* do after stop to avoid reconfiguring when we stop anyway */
55de908a 863 if (hw_reconf_flags)
e8975581
JB		 864 ieee80211_hw_config(local, hw_reconf_flags);
865
5061b0c2
JB		 866 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
867 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
868 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
869 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
870 if (info->control.vif == &sdata->vif) {
871 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 872 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 873 }
874 }
875 }
876 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847
JB		 877
878 if (local->monitors == local->open_count && local->monitors > 0)
879 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 880}
881
882static int ieee80211_stop(struct net_device *dev)
883{
884 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
885
886 ieee80211_do_stop(sdata, true);
5061b0c2 887
0d143fe1
JB		 888 return 0;
889}
890
891static void ieee80211_set_multicast_list(struct net_device *dev)
892{
0d143fe1 893 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 894 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 895 int allmulti, promisc, sdata_allmulti, sdata_promisc;
896
897 allmulti = !!(dev->flags & IFF_ALLMULTI);
898 promisc = !!(dev->flags & IFF_PROMISC);
899 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
900 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
901
902 if (allmulti != sdata_allmulti) {
903 if (dev->flags & IFF_ALLMULTI)
904 atomic_inc(&local->iff_allmultis);
905 else
906 atomic_dec(&local->iff_allmultis);
907 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
908 }
909
910 if (promisc != sdata_promisc) {
911 if (dev->flags & IFF_PROMISC)
912 atomic_inc(&local->iff_promiscs);
913 else
914 atomic_dec(&local->iff_promiscs);
915 sdata->flags ^= IEEE80211_SDATA_PROMISC;
916 }
3b8d81e0 917 spin_lock_bh(&local->filter_lock);
22bedad3 918 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 919 spin_unlock_bh(&local->filter_lock);
3ac64bee 920 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 921}
922
75636525
JB		 923/*
924 * Called when the netdev is removed or, by the code below, before
925 * the interface type changes.
926 */
f142c6b9 927static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 928{
75636525 929 int flushed;
f0706e82
JB		 930 int i;
931
75636525
JB		 932 /* free extra data */
933 ieee80211_free_keys(sdata);
934
aee14ceb
JM		 935 ieee80211_debugfs_remove_netdev(sdata);
936
f0706e82 937 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 938 __skb_queue_purge(&sdata->fragments[i].skb_list);
939 sdata->fragment_next = 0;
11a843b7 940
b9dcf712
JB		 941 if (ieee80211_vif_is_mesh(&sdata->vif))
942 mesh_rmc_free(sdata);
75636525 943
b998e8bb 944 flushed = sta_info_flush(sdata);
75636525 945 WARN_ON(flushed);
f0706e82
JB		 946}
947
f142c6b9
JB		 948static void ieee80211_uninit(struct net_device *dev)
949{
950 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
951}
952
cf0277e7
JB		 953static u16 ieee80211_netdev_select_queue(struct net_device *dev,
954 struct sk_buff *skb)
955{
956 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
957}
958
587e729e
JB		 959static const struct net_device_ops ieee80211_dataif_ops = {
960 .ndo_open = ieee80211_open,
961 .ndo_stop = ieee80211_stop,
f142c6b9 962 .ndo_uninit = ieee80211_uninit,
587e729e 963 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 964 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 965 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 966 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 967 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 968};
969
cf0277e7
JB		 970static u16 ieee80211_monitor_select_queue(struct net_device *dev,
971 struct sk_buff *skb)
972{
973 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
974 struct ieee80211_local *local = sdata->local;
975 struct ieee80211_hdr *hdr;
976 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
977
32c5057b 978 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 979 return 0;
980
981 if (skb->len < 4 ||
b49bb574 982 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 983 return 0; /* doesn't matter, frame will be dropped */
984
b49bb574 985 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 986
00e96dec 987 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 988}
989
587e729e
JB		 990static const struct net_device_ops ieee80211_monitorif_ops = {
991 .ndo_open = ieee80211_open,
992 .ndo_stop = ieee80211_stop,
f142c6b9 993 .ndo_uninit = ieee80211_uninit,
587e729e 994 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 995 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 996 .ndo_change_mtu = ieee80211_change_mtu,
997 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 998 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 999};
1000
1001static void ieee80211_if_setup(struct net_device *dev)
1002{
1003 ether_setup(dev);
550fd08c 1004 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1005 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1006 dev->destructor = free_netdev;
1007}
1008
1fa57d01
JB		 1009static void ieee80211_iface_work(struct work_struct *work)
1010{
1011 struct ieee80211_sub_if_data *sdata =
1012 container_of(work, struct ieee80211_sub_if_data, work);
1013 struct ieee80211_local *local = sdata->local;
1014 struct sk_buff *skb;
344eec67 1015 struct sta_info *sta;
c1475ca9 1016 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1017
1018 if (!ieee80211_sdata_running(sdata))
1019 return;
1020
1021 if (local->scanning)
1022 return;
1023
1024 /*
1025 * ieee80211_queue_work() should have picked up most cases,
1026 * here we'll pick the rest.
1027 */
1028 if (WARN(local->suspended,
1029 "interface work scheduled while going to suspend\n"))
1030 return;
1031
1032 /* first process frames */
1033 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1034 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1035
c1475ca9
JB		 1036 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1037 ra_tid = (void *)&skb->cb;
1038 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1039 ra_tid->tid);
1040 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1041 ra_tid = (void *)&skb->cb;
1042 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1043 ra_tid->tid);
1044 } else if (ieee80211_is_action(mgmt->frame_control) &&
1045 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1046 int len = skb->len;
bed7ee6e 1047
a93e3644 1048 mutex_lock(&local->sta_mtx);
875ae5f6 1049 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1050 if (sta) {
1051 switch (mgmt->u.action.u.addba_req.action_code) {
1052 case WLAN_ACTION_ADDBA_REQ:
1053 ieee80211_process_addba_request(
1054 local, sta, mgmt, len);
1055 break;
1056 case WLAN_ACTION_ADDBA_RESP:
1057 ieee80211_process_addba_resp(local, sta,
1058 mgmt, len);
1059 break;
1060 case WLAN_ACTION_DELBA:
1061 ieee80211_process_delba(sdata, sta,
1062 mgmt, len);
1063 break;
1064 default:
1065 WARN_ON(1);
1066 break;
1067 }
1068 }
a93e3644 1069 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1070 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1071 struct ieee80211_hdr *hdr = (void *)mgmt;
1072 /*
1073 * So the frame isn't mgmt, but frame_control
1074 * is at the right place anyway, of course, so
1075 * the if statement is correct.
1076 *
1077 * Warn if we have other data frame types here,
1078 * they must not get here.
1079 */
1080 WARN_ON(hdr->frame_control &
1081 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1082 WARN_ON(!(hdr->seq_ctrl &
1083 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1084 /*
1085 * This was a fragment of a frame, received while
1086 * a block-ack session was active. That cannot be
1087 * right, so terminate the session.
1088 */
a93e3644 1089 mutex_lock(&local->sta_mtx);
875ae5f6 1090 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1091 if (sta) {
1092 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1093 IEEE80211_QOS_CTL_TID_MASK;
1094
1095 __ieee80211_stop_rx_ba_session(
1096 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1097 WLAN_REASON_QSTA_REQUIRE_SETUP,
1098 true);
344eec67 1099 }
a93e3644 1100 mutex_unlock(&local->sta_mtx);
bed7ee6e 1101 } else switch (sdata->vif.type) {
1fa57d01
JB		 1102 case NL80211_IFTYPE_STATION:
1103 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1104 break;
1105 case NL80211_IFTYPE_ADHOC:
1106 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1107 break;
1108 case NL80211_IFTYPE_MESH_POINT:
1109 if (!ieee80211_vif_is_mesh(&sdata->vif))
1110 break;
1111 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1112 break;
1113 default:
1114 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1115 break;
1116 }
36b3a628
JB		 1117
1118 kfree_skb(skb);
1fa57d01
JB		 1119 }
1120
1121 /* then other type-dependent work */
1122 switch (sdata->vif.type) {
1123 case NL80211_IFTYPE_STATION:
1124 ieee80211_sta_work(sdata);
1125 break;
1126 case NL80211_IFTYPE_ADHOC:
1127 ieee80211_ibss_work(sdata);
1128 break;
1129 case NL80211_IFTYPE_MESH_POINT:
1130 if (!ieee80211_vif_is_mesh(&sdata->vif))
1131 break;
1132 ieee80211_mesh_work(sdata);
1133 break;
1134 default:
1135 break;
1136 }
1137}
1138
04ecd257
JB		 1139static void ieee80211_recalc_smps_work(struct work_struct *work)
1140{
1141 struct ieee80211_sub_if_data *sdata =
1142 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1143
1144 ieee80211_recalc_smps(sdata);
1145}
1fa57d01 1146
75636525
JB		 1147/*
1148 * Helper function to initialise an interface to a specific type.
1149 */
1150static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1151 enum nl80211_iftype type)
f0706e82 1152{
75636525
JB		 1153 /* clear type-dependent union */
1154 memset(&sdata->u, 0, sizeof(sdata->u));
1155
1156 /* and set some type-dependent values */
1157 sdata->vif.type = type;
2ca27bcf 1158 sdata->vif.p2p = false;
60719ffd 1159 sdata->wdev.iftype = type;
75636525 1160
a621fa4d
JB		 1161 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1162 sdata->control_port_no_encrypt = false;
1163
b53be792
SW		 1164 sdata->noack_map = 0;
1165
f142c6b9
JB		 1166 /* only monitor/p2p-device differ */
1167 if (sdata->dev) {
1168 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1169 sdata->dev->type = ARPHRD_ETHER;
1170 }
75636525 1171
35f20c14 1172 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1173 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1174 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1175
75636525 1176 switch (type) {
2ca27bcf
JB		 1177 case NL80211_IFTYPE_P2P_GO:
1178 type = NL80211_IFTYPE_AP;
1179 sdata->vif.type = type;
1180 sdata->vif.p2p = true;
1181 /* fall through */
05c914fe 1182 case NL80211_IFTYPE_AP:
d012a605 1183 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1184 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1185 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1186 break;
2ca27bcf
JB		 1187 case NL80211_IFTYPE_P2P_CLIENT:
1188 type = NL80211_IFTYPE_STATION;
1189 sdata->vif.type = type;
1190 sdata->vif.p2p = true;
1191 /* fall through */
05c914fe 1192 case NL80211_IFTYPE_STATION:
ad2d223a 1193 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1194 ieee80211_sta_setup_sdata(sdata);
472dbc45 1195 break;
46900298 1196 case NL80211_IFTYPE_ADHOC:
ad2d223a 1197 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1198 ieee80211_ibss_setup_sdata(sdata);
1199 break;
05c914fe 1200 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1201 if (ieee80211_vif_is_mesh(&sdata->vif))
1202 ieee80211_mesh_init_sdata(sdata);
1203 break;
05c914fe 1204 case NL80211_IFTYPE_MONITOR:
75636525 1205 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1206 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1207 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1208 MONITOR_FLAG_OTHER_BSS;
1209 break;
05c914fe 1210 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1211 sdata->vif.bss_conf.bssid = NULL;
1212 break;
05c914fe 1213 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1214 break;
98104fde 1215 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1216 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1217 break;
05c914fe 1218 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1219 case NUM_NL80211_IFTYPES:
75636525
JB		 1220 BUG();
1221 break;
1222 }
1223
1224 ieee80211_debugfs_add_netdev(sdata);
1225}
1226
34d4bc4d
JB		 1227static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1228 enum nl80211_iftype type)
1229{
1230 struct ieee80211_local *local = sdata->local;
1231 int ret, err;
2ca27bcf
JB		 1232 enum nl80211_iftype internal_type = type;
1233 bool p2p = false;
34d4bc4d
JB		 1234
1235 ASSERT_RTNL();
1236
1237 if (!local->ops->change_interface)
1238 return -EBUSY;
1239
1240 switch (sdata->vif.type) {
1241 case NL80211_IFTYPE_AP:
1242 case NL80211_IFTYPE_STATION:
1243 case NL80211_IFTYPE_ADHOC:
1244 /*
1245 * Could maybe also all others here?
1246 * Just not sure how that interacts
1247 * with the RX/config path e.g. for
1248 * mesh.
1249 */
1250 break;
1251 default:
1252 return -EBUSY;
1253 }
1254
1255 switch (type) {
1256 case NL80211_IFTYPE_AP:
1257 case NL80211_IFTYPE_STATION:
1258 case NL80211_IFTYPE_ADHOC:
1259 /*
1260 * Could probably support everything
1261 * but WDS here (WDS do_open can fail
1262 * under memory pressure, which this
1263 * code isn't prepared to handle).
1264 */
1265 break;
2ca27bcf
JB		 1266 case NL80211_IFTYPE_P2P_CLIENT:
1267 p2p = true;
1268 internal_type = NL80211_IFTYPE_STATION;
1269 break;
1270 case NL80211_IFTYPE_P2P_GO:
1271 p2p = true;
1272 internal_type = NL80211_IFTYPE_AP;
1273 break;
34d4bc4d
JB		 1274 default:
1275 return -EBUSY;
1276 }
1277
2ca27bcf 1278 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1279 if (ret)
1280 return ret;
1281
1282 ieee80211_do_stop(sdata, false);
1283
f142c6b9 1284 ieee80211_teardown_sdata(sdata);
34d4bc4d 1285
2ca27bcf 1286 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1287 if (ret)
1288 type = sdata->vif.type;
1289
3a25a8c8
JB		 1290 /*
1291 * Ignore return value here, there's not much we can do since
1292 * the driver changed the interface type internally already.
1293 * The warnings will hopefully make driver authors fix it :-)
1294 */
1295 ieee80211_check_queues(sdata);
1296
34d4bc4d
JB		 1297 ieee80211_setup_sdata(sdata, type);
1298
f142c6b9 1299 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1300 WARN(err, "type change: do_open returned %d", err);
1301
1302 return ret;
1303}
1304
f3947e2d 1305int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1306 enum nl80211_iftype type)
75636525 1307{
34d4bc4d
JB		 1308 int ret;
1309
f3947e2d
JB		 1310 ASSERT_RTNL();
1311
2ca27bcf 1312 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1313 return 0;
1314
34d4bc4d
JB		 1315 if (ieee80211_sdata_running(sdata)) {
1316 ret = ieee80211_runtime_change_iftype(sdata, type);
1317 if (ret)
1318 return ret;
1319 } else {
1320 /* Purge and reset type-dependent state. */
f142c6b9 1321 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1322 ieee80211_setup_sdata(sdata, type);
1323 }
75636525
JB		 1324
1325 /* reset some values that shouldn't be kept across type changes */
75636525 1326 sdata->drop_unencrypted = 0;
9bc383de
JB		 1327 if (type == NL80211_IFTYPE_STATION)
1328 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1329
1330 return 0;
f0706e82
JB		 1331}
1332
fa9029f8 1333static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1334 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1335{
1336 struct ieee80211_sub_if_data *sdata;
1337 u64 mask, start, addr, val, inc;
1338 u8 *m;
1339 u8 tmp_addr[ETH_ALEN];
1340 int i;
1341
1342 /* default ... something at least */
f142c6b9 1343 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1344
1345 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1346 local->hw.wiphy->n_addresses <= 1)
1347 return;
1348
fa9029f8
JB		 1349 mutex_lock(&local->iflist_mtx);
1350
1351 switch (type) {
1352 case NL80211_IFTYPE_MONITOR:
1353 /* doesn't matter */
1354 break;
1355 case NL80211_IFTYPE_WDS:
1356 case NL80211_IFTYPE_AP_VLAN:
1357 /* match up with an AP interface */
1358 list_for_each_entry(sdata, &local->interfaces, list) {
1359 if (sdata->vif.type != NL80211_IFTYPE_AP)
1360 continue;
f142c6b9 1361 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1362 break;
1363 }
1364 /* keep default if no AP interface present */
1365 break;
6d71117a
JB		 1366 case NL80211_IFTYPE_P2P_CLIENT:
1367 case NL80211_IFTYPE_P2P_GO:
1368 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1369 list_for_each_entry(sdata, &local->interfaces, list) {
1370 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1371 continue;
1372 if (!ieee80211_sdata_running(sdata))
1373 continue;
1374 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1375 goto out_unlock;
1376 }
1377 }
1378 /* otherwise fall through */
fa9029f8
JB		 1379 default:
1380 /* assign a new address if possible -- try n_addresses first */
1381 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1382 bool used = false;
1383
1384 list_for_each_entry(sdata, &local->interfaces, list) {
1385 if (memcmp(local->hw.wiphy->addresses[i].addr,
1386 sdata->vif.addr, ETH_ALEN) == 0) {
1387 used = true;
1388 break;
1389 }
1390 }
1391
1392 if (!used) {
f142c6b9 1393 memcpy(perm_addr,
fa9029f8
JB		 1394 local->hw.wiphy->addresses[i].addr,
1395 ETH_ALEN);
1396 break;
1397 }
1398 }
1399
1400 /* try mask if available */
1401 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1402 break;
1403
1404 m = local->hw.wiphy->addr_mask;
1405 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1406 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1407 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1408
1409 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1410 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1411 pr_info("not contiguous\n");
fa9029f8
JB		 1412 break;
1413 }
1414
1415 m = local->hw.wiphy->perm_addr;
1416 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1417 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1418 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1419
1420 inc = 1ULL<<__ffs64(mask);
1421 val = (start & mask);
1422 addr = (start & ~mask) | (val & mask);
1423 do {
1424 bool used = false;
1425
1426 tmp_addr[5] = addr >> 0*8;
1427 tmp_addr[4] = addr >> 1*8;
1428 tmp_addr[3] = addr >> 2*8;
1429 tmp_addr[2] = addr >> 3*8;
1430 tmp_addr[1] = addr >> 4*8;
1431 tmp_addr[0] = addr >> 5*8;
1432
1433 val += inc;
1434
1435 list_for_each_entry(sdata, &local->interfaces, list) {
1436 if (memcmp(tmp_addr, sdata->vif.addr,
1437 ETH_ALEN) == 0) {
1438 used = true;
1439 break;
1440 }
1441 }
1442
1443 if (!used) {
f142c6b9 1444 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1445 break;
1446 }
1447 addr = (start & ~mask) | (val & mask);
1448 } while (addr != start);
1449
1450 break;
1451 }
1452
6d71117a 1453 out_unlock:
fa9029f8
JB		 1454 mutex_unlock(&local->iflist_mtx);
1455}
1456
97f97b1f
JB		 1457static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1458{
1459 struct ieee80211_sub_if_data *sdata;
1460
1461 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1462
1463 ieee80211_cleanup_sdata_stas(sdata);
1464}
1465
3e122be0 1466int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1467 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1468 struct vif_params *params)
f0706e82 1469{
f142c6b9 1470 struct net_device *ndev = NULL;
f0706e82 1471 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1472 int ret, i;
ded81f6b 1473 int txqs = 1;
f0706e82
JB		 1474
1475 ASSERT_RTNL();
75636525 1476
f142c6b9
JB		 1477 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1478 struct wireless_dev *wdev;
1479
1480 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1481 GFP_KERNEL);
1482 if (!sdata)
1483 return -ENOMEM;
1484 wdev = &sdata->wdev;
1485
1486 sdata->dev = NULL;
1487 strlcpy(sdata->name, name, IFNAMSIZ);
1488 ieee80211_assign_perm_addr(local, wdev->address, type);
1489 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1490 } else {
1491 if (local->hw.queues >= IEEE80211_NUM_ACS)
1492 txqs = IEEE80211_NUM_ACS;
1493
1494 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1495 local->hw.vif_data_size,
1496 name, ieee80211_if_setup, txqs, 1);
1497 if (!ndev)
1498 return -ENOMEM;
1499 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1500
1501 ndev->needed_headroom = local->tx_headroom +
1502 4*6 /* four MAC addresses */
1503 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1504 + 6 /* mesh */
1505 + 8 /* rfc1042/bridge tunnel */
1506 - ETH_HLEN /* ethernet hard_header_len */
1507 + IEEE80211_ENCRYPT_HEADROOM;
1508 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1509
1510 ret = dev_alloc_name(ndev, ndev->name);
1511 if (ret < 0) {
1512 free_netdev(ndev);
1513 return ret;
1514 }
1515
1516 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1517 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1518 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1519
1520 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1521 sdata = netdev_priv(ndev);
1522 ndev->ieee80211_ptr = &sdata->wdev;
1523 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1524 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1525
1526 sdata->dev = ndev;
1527 }
75636525
JB		 1528
1529 /* initialise type-independent data */
f0706e82 1530 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1531 sdata->local = local;
75636525
JB		 1532
1533 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1534 skb_queue_head_init(&sdata->fragments[i].skb_list);
1535
1536 INIT_LIST_HEAD(&sdata->key_list);
1537
97f97b1f
JB		 1538 spin_lock_init(&sdata->cleanup_stations_lock);
1539 INIT_LIST_HEAD(&sdata->cleanup_stations);
1540 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1541 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1542 ieee80211_dfs_cac_timer_work);
97f97b1f 1543
37eb0b16
JM		 1544 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1545 struct ieee80211_supported_band *sband;
1546 sband = local->hw.wiphy->bands[i];
1547 sdata->rc_rateidx_mask[i] =
1548 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1549 if (sband)
1550 memcpy(sdata->rc_rateidx_mcs_mask[i],
1551 sband->ht_cap.mcs.rx_mask,
1552 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1553 else
1554 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1555 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1556 }
75636525 1557
3a25a8c8
JB		 1558 ieee80211_set_default_queues(sdata);
1559
1ea6f9c0
JB		 1560 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1561 sdata->user_power_level = local->user_power_level;
1562
75636525
JB		 1563 /* setup type-dependent data */
1564 ieee80211_setup_sdata(sdata, type);
f0706e82 1565
f142c6b9
JB		 1566 if (ndev) {
1567 if (params) {
1568 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1569 if (type == NL80211_IFTYPE_STATION)
1570 sdata->u.mgd.use_4addr = params->use_4addr;
1571 }
9bc383de 1572
f142c6b9 1573 ndev->features |= local->hw.netdev_features;
72d78728 1574
f142c6b9
JB		 1575 ret = register_netdevice(ndev);
1576 if (ret) {
1577 free_netdev(ndev);
1578 return ret;
1579 }
1580 }
f0706e82 1581
c771c9d8 1582 mutex_lock(&local->iflist_mtx);
79010420 1583 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1584 mutex_unlock(&local->iflist_mtx);
79010420 1585
84efbb84
JB		 1586 if (new_wdev)
1587 *new_wdev = &sdata->wdev;
f0706e82 1588
f0706e82 1589 return 0;
f0706e82
JB		 1590}
1591
f698d856 1592void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1593{
f0706e82 1594 ASSERT_RTNL();
11a843b7 1595
c771c9d8 1596 mutex_lock(&sdata->local->iflist_mtx);
75636525 1597 list_del_rcu(&sdata->list);
c771c9d8
JB		 1598 mutex_unlock(&sdata->local->iflist_mtx);
1599
75636525 1600 synchronize_rcu();
f142c6b9
JB		 1601
1602 if (sdata->dev) {
1603 unregister_netdevice(sdata->dev);
1604 } else {
1605 cfg80211_unregister_wdev(&sdata->wdev);
1606 kfree(sdata);
1607 }
1608}
1609
1610void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1611{
1612 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1613 return;
1614 ieee80211_do_stop(sdata, true);
1615 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1616}
1617
75636525
JB		 1618/*
1619 * Remove all interfaces, may only be called at hardware unregistration
1620 * time because it doesn't do RCU-safe list removals.
1621 */
1622void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1623{
75636525 1624 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1625 LIST_HEAD(unreg_list);
f142c6b9 1626 LIST_HEAD(wdev_list);
f0706e82
JB		 1627
1628 ASSERT_RTNL();
1629
efe117ab 1630 mutex_lock(&local->iflist_mtx);
75636525
JB		 1631 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1632 list_del(&sdata->list);
c771c9d8 1633
f142c6b9
JB		 1634 if (sdata->dev)
1635 unregister_netdevice_queue(sdata->dev, &unreg_list);
1636 else
1637 list_add(&sdata->list, &wdev_list);
f0706e82 1638 }
efe117ab
ED		 1639 mutex_unlock(&local->iflist_mtx);
1640 unregister_netdevice_many(&unreg_list);
5f04d506 1641 list_del(&unreg_list);
f142c6b9
JB		 1642
1643 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1644 list_del(&sdata->list);
1645 cfg80211_unregister_wdev(&sdata->wdev);
1646 kfree(sdata);
1647 }
f0706e82 1648}
5cff20e6 1649
47846c9b
JB		 1650static int netdev_notify(struct notifier_block *nb,
1651 unsigned long state,
1652 void *ndev)
1653{
1654 struct net_device *dev = ndev;
1655 struct ieee80211_sub_if_data *sdata;
1656
1657 if (state != NETDEV_CHANGENAME)
1658 return 0;
1659
1660 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1661 return 0;
1662
1663 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1664 return 0;
1665
1666 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1667
2f5265e6 1668 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1669
1670 ieee80211_debugfs_rename_netdev(sdata);
1671 return 0;
1672}
1673
1674static struct notifier_block mac80211_netdev_notifier = {
1675 .notifier_call = netdev_notify,
1676};
1677
1678int ieee80211_iface_init(void)
1679{
1680 return register_netdevice_notifier(&mac80211_netdev_notifier);
1681}
1682
1683void ieee80211_iface_exit(void)
1684{
1685 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1686}
Linux 6.x block layer and io_uring tree(s)