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mac80211: flush keys when stopping AP
[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
b759f4dd 110 active = !list_empty(&local->chanctx_list) || local->monitors;
cc45ae54
JB		 111
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
114 working = true;
fd0f979a 115 break;
cc45ae54
JB		 116 }
117 }
118
f1e3e051
JB		 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 121
cc45ae54
JB		 122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
fd0f979a 127 if (active)
cc45ae54
JB		 128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129 else
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
133
fd0f979a
JB		 134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
cc45ae54 136 else
fd0f979a
JB		 137 change = ieee80211_idle_on(local);
138 if (change)
139 ieee80211_hw_config(local, change);
cc45ae54
JB		 140}
141
0d143fe1
JB		 142static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
143{
09b1426e 144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 145 return -EINVAL;
0d143fe1 146
0d143fe1
JB		 147 dev->mtu = new_mtu;
148 return 0;
149}
150
478622e8
HS		 151static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
152{
153 struct ieee80211_sub_if_data *sdata;
154 u64 new, mask, tmp;
155 u8 *m;
156 int ret = 0;
157
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
159 return 0;
160
161 m = addr;
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
165
166 m = local->hw.wiphy->addr_mask;
167 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
175 continue;
176
177 m = sdata->vif.addr;
178 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
182 if ((new & ~mask) != (tmp & ~mask)) {
183 ret = -EINVAL;
184 break;
185 }
186 }
187 mutex_unlock(&local->iflist_mtx);
188
189 return ret;
190}
191
47846c9b
JB		 192static int ieee80211_change_mac(struct net_device *dev, void *addr)
193{
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 195 struct sockaddr *sa = addr;
47846c9b
JB		 196 int ret;
197
9607e6b6 198 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 199 return -EBUSY;
200
478622e8
HS		 201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
202 if (ret)
203 return ret;
204
fc5f7577 205 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 206
207 if (ret == 0)
fc5f7577 208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 209
210 return ret;
211}
212
0d143fe1
JB		 213static inline int identical_mac_addr_allowed(int type1, int type2)
214{
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
227}
228
87490f6d
JB		 229static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
0d143fe1 231{
b4a4bf5d 232 struct ieee80211_local *local = sdata->local;
87490f6d 233 struct ieee80211_sub_if_data *nsdata;
0d143fe1 234
87490f6d 235 ASSERT_RTNL();
0d143fe1
JB		 236
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 240 /*
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
244 *
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
249 */
87490f6d 250 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
252 return -EBUSY;
253
254 /*
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
257 */
371a255e
JB		 258 if (!ether_addr_equal(sdata->vif.addr,
259 nsdata->vif.addr))
0d143fe1
JB		 260 continue;
261
262 /*
263 * check whether it may have the same address
264 */
87490f6d 265 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 266 nsdata->vif.type))
267 return -ENOTUNIQ;
268
269 /*
270 * can only add VLANs to enabled APs
271 */
87490f6d 272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
275 }
276 }
277
87490f6d
JB		 278 return 0;
279}
280
3a25a8c8
JB		 281static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
282{
283 int n_queues = sdata->local->hw.queues;
284 int i;
285
0ef24e52
IP		 286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
290 return -EINVAL;
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
292 n_queues))
293 return -EINVAL;
294 }
3a25a8c8
JB		 295 }
296
8ffb5c00
BC		 297 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
298 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 299 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 300 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
301 return 0;
302 }
303
304 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
305 return -EINVAL;
306
307 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
308 return -EINVAL;
309
310 return 0;
311}
312
85416a4f
CL		 313void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
314 const int offset)
315{
316 struct ieee80211_local *local = sdata->local;
317 u32 flags = sdata->u.mntr_flags;
318
319#define ADJUST(_f, _s) do { \
320 if (flags & MONITOR_FLAG_##_f) \
321 local->fif_##_s += offset; \
322 } while (0)
323
324 ADJUST(FCSFAIL, fcsfail);
325 ADJUST(PLCPFAIL, plcpfail);
326 ADJUST(CONTROL, control);
327 ADJUST(CONTROL, pspoll);
328 ADJUST(OTHER_BSS, other_bss);
329
330#undef ADJUST
331}
332
3a25a8c8
JB		 333static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
334{
335 struct ieee80211_local *local = sdata->local;
336 int i;
337
338 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
339 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
340 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 341 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 342 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 343 else
344 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 345 }
346 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347}
348
075e0847 349static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 350{
351 struct ieee80211_sub_if_data *sdata;
685fb72b 352 int ret = 0;
4b6f1dd6
JB		 353
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
355 return 0;
356
685fb72b
JB		 357 mutex_lock(&local->iflist_mtx);
358
4b6f1dd6 359 if (local->monitor_sdata)
685fb72b 360 goto out_unlock;
4b6f1dd6
JB		 361
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
685fb72b
JB		 363 if (!sdata) {
364 ret = -ENOMEM;
365 goto out_unlock;
366 }
4b6f1dd6
JB		 367
368 /* set up data */
369 sdata->local = local;
370 sdata->vif.type = NL80211_IFTYPE_MONITOR;
371 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
372 wiphy_name(local->hw.wiphy));
373
3a25a8c8
JB		 374 ieee80211_set_default_queues(sdata);
375
4b6f1dd6
JB		 376 ret = drv_add_interface(local, sdata);
377 if (WARN_ON(ret)) {
378 /* ok .. stupid driver, it asked for this! */
379 kfree(sdata);
685fb72b 380 goto out_unlock;
4b6f1dd6
JB		 381 }
382
3a25a8c8
JB		 383 ret = ieee80211_check_queues(sdata);
384 if (ret) {
385 kfree(sdata);
685fb72b 386 goto out_unlock;
3a25a8c8
JB		 387 }
388
4bf88530 389 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 390 IEEE80211_CHANCTX_EXCLUSIVE);
391 if (ret) {
392 drv_remove_interface(local, sdata);
393 kfree(sdata);
394 goto out_unlock;
395 }
396
4b6f1dd6 397 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b
JB		 398 out_unlock:
399 mutex_unlock(&local->iflist_mtx);
400 return ret;
4b6f1dd6
JB		 401}
402
075e0847 403static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 404{
405 struct ieee80211_sub_if_data *sdata;
406
407 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
408 return;
409
685fb72b 410 mutex_lock(&local->iflist_mtx);
4b6f1dd6 411
685fb72b
JB		 412 sdata = rcu_dereference_protected(local->monitor_sdata,
413 lockdep_is_held(&local->iflist_mtx));
4b6f1dd6 414 if (!sdata)
685fb72b 415 goto out_unlock;
4b6f1dd6
JB		 416
417 rcu_assign_pointer(local->monitor_sdata, NULL);
418 synchronize_net();
419
55de908a
JB		 420 ieee80211_vif_release_channel(sdata);
421
4b6f1dd6
JB		 422 drv_remove_interface(local, sdata);
423
424 kfree(sdata);
685fb72b
JB		 425 out_unlock:
426 mutex_unlock(&local->iflist_mtx);
4b6f1dd6
JB		 427}
428
34d4bc4d
JB		 429/*
430 * NOTE: Be very careful when changing this function, it must NOT return
431 * an error on interface type changes that have been pre-checked, so most
432 * checks should be in ieee80211_check_concurrent_iface.
433 */
f142c6b9 434int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 435{
f142c6b9
JB		 436 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
437 struct net_device *dev = wdev->netdev;
87490f6d
JB		 438 struct ieee80211_local *local = sdata->local;
439 struct sta_info *sta;
440 u32 changed = 0;
441 int res;
442 u32 hw_reconf_flags = 0;
443
0d143fe1
JB		 444 switch (sdata->vif.type) {
445 case NL80211_IFTYPE_WDS:
446 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
447 return -ENOLINK;
448 break;
665c93a9
JB		 449 case NL80211_IFTYPE_AP_VLAN: {
450 struct ieee80211_sub_if_data *master;
451
0d143fe1
JB		 452 if (!sdata->bss)
453 return -ENOLINK;
665c93a9 454
0d143fe1 455 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 456
457 master = container_of(sdata->bss,
458 struct ieee80211_sub_if_data, u.ap);
459 sdata->control_port_protocol =
460 master->control_port_protocol;
461 sdata->control_port_no_encrypt =
462 master->control_port_no_encrypt;
0d143fe1 463 break;
665c93a9 464 }
0d143fe1
JB		 465 case NL80211_IFTYPE_AP:
466 sdata->bss = &sdata->u.ap;
467 break;
468 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 469 case NL80211_IFTYPE_STATION:
470 case NL80211_IFTYPE_MONITOR:
471 case NL80211_IFTYPE_ADHOC:
f142c6b9 472 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 473 /* no special treatment */
474 break;
475 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 476 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 477 case NL80211_IFTYPE_P2P_CLIENT:
478 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 479 /* cannot happen */
480 WARN_ON(1);
481 break;
482 }
483
484 if (local->open_count == 0) {
24487981 485 res = drv_start(local);
0d143fe1
JB		 486 if (res)
487 goto err_del_bss;
e8975581
JB		 488 /* we're brought up, everything changes */
489 hw_reconf_flags = ~0;
1f87f7d3 490 ieee80211_led_radio(local, true);
67408c8c
JB		 491 ieee80211_mod_tpt_led_trig(local,
492 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 493 }
494
495 /*
bf533e0b
JB		 496 * Copy the hopefully now-present MAC address to
497 * this interface, if it has the special null one.
0d143fe1 498 */
f142c6b9 499 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 500 memcpy(dev->dev_addr,
501 local->hw.wiphy->perm_addr,
502 ETH_ALEN);
503 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
504
505 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 506 res = -EADDRNOTAVAIL;
507 goto err_stop;
0adc23f5 508 }
0d143fe1
JB		 509 }
510
0d143fe1
JB		 511 switch (sdata->vif.type) {
512 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 513 /* no need to tell driver, but set carrier and chanctx */
514 if (rtnl_dereference(sdata->bss->beacon)) {
515 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 516 netif_carrier_on(dev);
4d76d21b 517 } else {
3edaf3e6 518 netif_carrier_off(dev);
4d76d21b 519 }
0d143fe1
JB		 520 break;
521 case NL80211_IFTYPE_MONITOR:
522 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
523 local->cooked_mntrs++;
524 break;
525 }
526
075e0847
JB		 527 if (local->monitors == 0 && local->open_count == 0) {
528 res = ieee80211_add_virtual_monitor(local);
529 if (res)
530 goto err_stop;
531 }
532
0d143fe1
JB		 533 /* must be before the call to ieee80211_configure_filter */
534 local->monitors++;
e8975581 535 if (local->monitors == 1) {
0869aea0
JB		 536 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
537 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 538 }
0d143fe1 539
85416a4f 540 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 541 ieee80211_configure_filter(local);
801d929c
FF		 542 mutex_lock(&local->mtx);
543 ieee80211_recalc_idle(local);
544 mutex_unlock(&local->mtx);
53e9b1de
DG		 545
546 netif_carrier_on(dev);
0d143fe1 547 break;
0d143fe1 548 default:
34d4bc4d 549 if (coming_up) {
075e0847
JB		 550 ieee80211_del_virtual_monitor(local);
551
7b7eab6f 552 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 553 if (res)
554 goto err_stop;
3a25a8c8
JB		 555 res = ieee80211_check_queues(sdata);
556 if (res)
557 goto err_del_interface;
34d4bc4d 558 }
0d143fe1 559
b207cdb0
AB		 560 drv_add_interface_debugfs(local, sdata);
561
29cbe68c 562 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 563 local->fif_pspoll++;
7be5086d 564 local->fif_probe_req++;
e3b90ca2 565
e3b90ca2 566 ieee80211_configure_filter(local);
7be5086d
JB		 567 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
568 local->fif_probe_req++;
a3c9aa51 569 }
e3b90ca2 570
f142c6b9
JB		 571 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
572 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 573 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 574
c405c629
JB		 575 switch (sdata->vif.type) {
576 case NL80211_IFTYPE_STATION:
577 case NL80211_IFTYPE_ADHOC:
578 case NL80211_IFTYPE_AP:
579 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 580 netif_carrier_off(dev);
c405c629 581 break;
1411af15 582 case NL80211_IFTYPE_WDS:
f142c6b9 583 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 584 break;
c405c629 585 default:
0d143fe1 586 netif_carrier_on(dev);
c405c629 587 }
59034591
EP		 588
589 /*
590 * set default queue parameters so drivers don't
591 * need to initialise the hardware if the hardware
592 * doesn't start up with sane defaults
593 */
3abead59 594 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 595 }
596
2d2080c3
JB		 597 set_bit(SDATA_STATE_RUNNING, &sdata->state);
598
0d143fe1
JB		 599 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
600 /* Create STA entry for the WDS peer */
601 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
602 GFP_KERNEL);
603 if (!sta) {
604 res = -ENOMEM;
605 goto err_del_interface;
606 }
607
83d5cc01
JB		 608 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
609 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
610 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 611
612 res = sta_info_insert(sta);
613 if (res) {
614 /* STA has been freed */
615 goto err_del_interface;
616 }
1be7fe8d
BJ		 617
618 rate_control_rate_init(sta);
1411af15 619 netif_carrier_on(dev);
f142c6b9
JB		 620 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
621 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 622 }
623
0d143fe1
JB		 624 /*
625 * set_multicast_list will be invoked by the networking core
626 * which will check whether any increments here were done in
627 * error and sync them down to the hardware as filter flags.
628 */
629 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
630 atomic_inc(&local->iff_allmultis);
631
632 if (sdata->flags & IEEE80211_SDATA_PROMISC)
633 atomic_inc(&local->iff_promiscs);
634
34d4bc4d
JB		 635 if (coming_up)
636 local->open_count++;
637
59034591 638 if (hw_reconf_flags)
e8975581 639 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 640
10f644a4 641 ieee80211_recalc_ps(local, -1);
965bedad 642
f142c6b9
JB		 643 if (dev)
644 netif_tx_start_all_queues(dev);
0d143fe1
JB		 645
646 return 0;
647 err_del_interface:
7b7eab6f 648 drv_remove_interface(local, sdata);
0d143fe1 649 err_stop:
24487981
JB		 650 if (!local->open_count)
651 drv_stop(local);
0d143fe1
JB		 652 err_del_bss:
653 sdata->bss = NULL;
654 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
655 list_del(&sdata->u.vlan.list);
4d6c36fa 656 /* might already be clear but that doesn't matter */
2d2080c3 657 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 658 return res;
659}
660
34d4bc4d 661static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 662{
663 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 664 int err;
665
666 /* fail early if user set an invalid address */
2fcf2824 667 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 668 return -EADDRNOTAVAIL;
669
670 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
671 if (err)
672 return err;
673
f142c6b9 674 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 675}
676
677static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
678 bool going_down)
679{
0d143fe1 680 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 681 unsigned long flags;
682 struct sk_buff *skb, *tmp;
e8975581 683 u32 hw_reconf_flags = 0;
09f4114e 684 int i, flushed;
397a7a24 685 struct ps_data *ps;
0d143fe1 686
c29acf20
RM		 687 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
688
e2fd5dbc 689 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 690 ieee80211_scan_cancel(local);
691
0d143fe1
JB		 692 /*
693 * Stop TX on this interface first.
694 */
f142c6b9
JB		 695 if (sdata->dev)
696 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 697
2eb278e0 698 ieee80211_roc_purge(sdata);
af6b6374 699
572078be
JB		 700 if (sdata->vif.type == NL80211_IFTYPE_STATION)
701 ieee80211_mgd_stop(sdata);
702
0d143fe1
JB		 703 /*
704 * Remove all stations associated with this interface.
705 *
706 * This must be done before calling ops->remove_interface()
707 * because otherwise we can later invoke ops->sta_notify()
708 * whenever the STAs are removed, and that invalidates driver
709 * assumptions about always getting a vif pointer that is valid
710 * (because if we remove a STA after ops->remove_interface()
711 * the driver will have removed the vif info already!)
712 *
09f4114e
JB		 713 * This is relevant only in WDS mode, in all other modes we've
714 * already removed all stations when disconnecting or similar,
715 * so warn otherwise.
051007d9
JB		 716 *
717 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 718 */
051007d9 719 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 720 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
721 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1
JB		 722
723 /*
724 * Don't count this interface for promisc/allmulti while it
725 * is down. dev_mc_unsync() will invoke set_multicast_list
726 * on the master interface which will sync these down to the
727 * hardware as filter flags.
728 */
729 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
730 atomic_dec(&local->iff_allmultis);
731
732 if (sdata->flags & IEEE80211_SDATA_PROMISC)
733 atomic_dec(&local->iff_promiscs);
734
7be5086d 735 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 736 local->fif_pspoll--;
7be5086d
JB		 737 local->fif_probe_req--;
738 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
739 local->fif_probe_req--;
740 }
e3b90ca2 741
f142c6b9
JB		 742 if (sdata->dev) {
743 netif_addr_lock_bh(sdata->dev);
744 spin_lock_bh(&local->filter_lock);
745 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
746 sdata->dev->addr_len);
747 spin_unlock_bh(&local->filter_lock);
748 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 749
f142c6b9
JB		 750 ieee80211_configure_filter(local);
751 }
3ac64bee 752
7cbf0ba5
VN		 753 del_timer_sync(&local->dynamic_ps_timer);
754 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 755
04ecd257
JB		 756 cancel_work_sync(&sdata->recalc_smps);
757
164eb02d
SW		 758 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
759
760 if (sdata->wdev.cac_started) {
761 mutex_lock(&local->iflist_mtx);
762 ieee80211_vif_release_channel(sdata);
763 mutex_unlock(&local->iflist_mtx);
764 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
765 GFP_KERNEL);
766 }
767
0d143fe1
JB		 768 /* APs need special treatment */
769 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 770 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 771
772 /* down all dependent devices, that is VLANs */
57c9fff3 773 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 774 u.vlan.list)
775 dev_close(vlan->dev);
776 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 777 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
778 /* remove all packets in parent bc_buf pointing to this dev */
779 ps = &sdata->bss->ps;
780
781 spin_lock_irqsave(&ps->bc_buf.lock, flags);
782 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
783 if (skb->dev == sdata->dev) {
784 __skb_unlink(skb, &ps->bc_buf);
785 local->total_ps_buffered--;
786 ieee80211_free_txskb(&local->hw, skb);
787 }
788 }
789 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 790 }
791
34d4bc4d
JB		 792 if (going_down)
793 local->open_count--;
0d143fe1
JB		 794
795 switch (sdata->vif.type) {
796 case NL80211_IFTYPE_AP_VLAN:
797 list_del(&sdata->u.vlan.list);
4d76d21b 798 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 799 /* no need to tell driver */
800 break;
801 case NL80211_IFTYPE_MONITOR:
802 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
803 local->cooked_mntrs--;
804 break;
805 }
806
807 local->monitors--;
e8975581 808 if (local->monitors == 0) {
0869aea0
JB		 809 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
810 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
075e0847 811 ieee80211_del_virtual_monitor(local);
e8975581 812 }
0d143fe1 813
85416a4f 814 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 815 ieee80211_configure_filter(local);
801d929c
FF		 816 mutex_lock(&local->mtx);
817 ieee80211_recalc_idle(local);
818 mutex_unlock(&local->mtx);
0d143fe1 819 break;
f142c6b9
JB		 820 case NL80211_IFTYPE_P2P_DEVICE:
821 /* relies on synchronize_rcu() below */
822 rcu_assign_pointer(local->p2p_sdata, NULL);
823 /* fall through */
0d143fe1 824 default:
0b7dff4f 825 cancel_work_sync(&sdata->work);
35f20c14
JB		 826 /*
827 * When we get here, the interface is marked down.
75de9113
JB		 828 *
829 * sta_info_flush_cleanup() requires rcu_barrier()
830 * first to wait for the station call_rcu() calls
831 * to complete, here we need at least sychronize_rcu()
832 * it to wait for the RX path in case it is using the
833 * interface and enqueuing frames at this very time on
834 * another CPU.
35f20c14 835 */
75de9113 836 rcu_barrier();
051007d9
JB		 837 sta_info_flush_cleanup(sdata);
838
35f20c14
JB		 839 skb_queue_purge(&sdata->skb_queue);
840
b9dcf712
JB		 841 /*
842 * Free all remaining keys, there shouldn't be any,
7b4396bd 843 * except maybe in WDS mode?
b9dcf712 844 */
ad0e2b5a 845 ieee80211_free_keys(sdata);
b9dcf712 846
b207cdb0
AB		 847 drv_remove_interface_debugfs(local, sdata);
848
34d4bc4d 849 if (going_down)
7b7eab6f 850 drv_remove_interface(local, sdata);
0d143fe1
JB		 851 }
852
853 sdata->bss = NULL;
854
5cff20e6
JB		 855 ieee80211_recalc_ps(local, -1);
856
0d143fe1 857 if (local->open_count == 0) {
ea77f12f 858 ieee80211_clear_tx_pending(local);
84f6a01c 859 ieee80211_stop_device(local);
0d143fe1 860
e8975581
JB		 861 /* no reconfiguring after stop! */
862 hw_reconf_flags = 0;
0d143fe1
JB		 863 }
864
e8975581 865 /* do after stop to avoid reconfiguring when we stop anyway */
55de908a 866 if (hw_reconf_flags)
e8975581
JB		 867 ieee80211_hw_config(local, hw_reconf_flags);
868
5061b0c2
JB		 869 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
870 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
871 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
872 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
873 if (info->control.vif == &sdata->vif) {
874 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 875 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 876 }
877 }
878 }
879 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847
JB		 880
881 if (local->monitors == local->open_count && local->monitors > 0)
882 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 883}
884
885static int ieee80211_stop(struct net_device *dev)
886{
887 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
888
889 ieee80211_do_stop(sdata, true);
5061b0c2 890
0d143fe1
JB		 891 return 0;
892}
893
894static void ieee80211_set_multicast_list(struct net_device *dev)
895{
0d143fe1 896 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 897 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 898 int allmulti, promisc, sdata_allmulti, sdata_promisc;
899
900 allmulti = !!(dev->flags & IFF_ALLMULTI);
901 promisc = !!(dev->flags & IFF_PROMISC);
902 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
903 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
904
905 if (allmulti != sdata_allmulti) {
906 if (dev->flags & IFF_ALLMULTI)
907 atomic_inc(&local->iff_allmultis);
908 else
909 atomic_dec(&local->iff_allmultis);
910 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
911 }
912
913 if (promisc != sdata_promisc) {
914 if (dev->flags & IFF_PROMISC)
915 atomic_inc(&local->iff_promiscs);
916 else
917 atomic_dec(&local->iff_promiscs);
918 sdata->flags ^= IEEE80211_SDATA_PROMISC;
919 }
3b8d81e0 920 spin_lock_bh(&local->filter_lock);
22bedad3 921 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 922 spin_unlock_bh(&local->filter_lock);
3ac64bee 923 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 924}
925
75636525
JB		 926/*
927 * Called when the netdev is removed or, by the code below, before
928 * the interface type changes.
929 */
f142c6b9 930static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 931{
75636525 932 int flushed;
f0706e82
JB		 933 int i;
934
75636525
JB		 935 /* free extra data */
936 ieee80211_free_keys(sdata);
937
aee14ceb
JM		 938 ieee80211_debugfs_remove_netdev(sdata);
939
f0706e82 940 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 941 __skb_queue_purge(&sdata->fragments[i].skb_list);
942 sdata->fragment_next = 0;
11a843b7 943
b9dcf712
JB		 944 if (ieee80211_vif_is_mesh(&sdata->vif))
945 mesh_rmc_free(sdata);
75636525 946
b998e8bb 947 flushed = sta_info_flush(sdata);
75636525 948 WARN_ON(flushed);
f0706e82
JB		 949}
950
f142c6b9
JB		 951static void ieee80211_uninit(struct net_device *dev)
952{
953 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
954}
955
cf0277e7
JB		 956static u16 ieee80211_netdev_select_queue(struct net_device *dev,
957 struct sk_buff *skb)
958{
959 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
960}
961
587e729e
JB		 962static const struct net_device_ops ieee80211_dataif_ops = {
963 .ndo_open = ieee80211_open,
964 .ndo_stop = ieee80211_stop,
f142c6b9 965 .ndo_uninit = ieee80211_uninit,
587e729e 966 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 967 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 968 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 969 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 970 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 971};
972
cf0277e7
JB		 973static u16 ieee80211_monitor_select_queue(struct net_device *dev,
974 struct sk_buff *skb)
975{
976 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
977 struct ieee80211_local *local = sdata->local;
978 struct ieee80211_hdr *hdr;
979 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
980
32c5057b 981 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 982 return 0;
983
984 if (skb->len < 4 ||
b49bb574 985 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 986 return 0; /* doesn't matter, frame will be dropped */
987
b49bb574 988 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 989
00e96dec 990 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 991}
992
587e729e
JB		 993static const struct net_device_ops ieee80211_monitorif_ops = {
994 .ndo_open = ieee80211_open,
995 .ndo_stop = ieee80211_stop,
f142c6b9 996 .ndo_uninit = ieee80211_uninit,
587e729e 997 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 998 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 999 .ndo_change_mtu = ieee80211_change_mtu,
1000 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1001 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1002};
1003
1004static void ieee80211_if_setup(struct net_device *dev)
1005{
1006 ether_setup(dev);
550fd08c 1007 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1008 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1009 dev->destructor = free_netdev;
1010}
1011
1fa57d01
JB		 1012static void ieee80211_iface_work(struct work_struct *work)
1013{
1014 struct ieee80211_sub_if_data *sdata =
1015 container_of(work, struct ieee80211_sub_if_data, work);
1016 struct ieee80211_local *local = sdata->local;
1017 struct sk_buff *skb;
344eec67 1018 struct sta_info *sta;
c1475ca9 1019 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1020
1021 if (!ieee80211_sdata_running(sdata))
1022 return;
1023
1024 if (local->scanning)
1025 return;
1026
1027 /*
1028 * ieee80211_queue_work() should have picked up most cases,
1029 * here we'll pick the rest.
1030 */
1031 if (WARN(local->suspended,
1032 "interface work scheduled while going to suspend\n"))
1033 return;
1034
1035 /* first process frames */
1036 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1037 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1038
c1475ca9
JB		 1039 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1040 ra_tid = (void *)&skb->cb;
1041 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1042 ra_tid->tid);
1043 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1044 ra_tid = (void *)&skb->cb;
1045 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1046 ra_tid->tid);
1047 } else if (ieee80211_is_action(mgmt->frame_control) &&
1048 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1049 int len = skb->len;
bed7ee6e 1050
a93e3644 1051 mutex_lock(&local->sta_mtx);
875ae5f6 1052 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1053 if (sta) {
1054 switch (mgmt->u.action.u.addba_req.action_code) {
1055 case WLAN_ACTION_ADDBA_REQ:
1056 ieee80211_process_addba_request(
1057 local, sta, mgmt, len);
1058 break;
1059 case WLAN_ACTION_ADDBA_RESP:
1060 ieee80211_process_addba_resp(local, sta,
1061 mgmt, len);
1062 break;
1063 case WLAN_ACTION_DELBA:
1064 ieee80211_process_delba(sdata, sta,
1065 mgmt, len);
1066 break;
1067 default:
1068 WARN_ON(1);
1069 break;
1070 }
1071 }
a93e3644 1072 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1073 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1074 struct ieee80211_hdr *hdr = (void *)mgmt;
1075 /*
1076 * So the frame isn't mgmt, but frame_control
1077 * is at the right place anyway, of course, so
1078 * the if statement is correct.
1079 *
1080 * Warn if we have other data frame types here,
1081 * they must not get here.
1082 */
1083 WARN_ON(hdr->frame_control &
1084 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1085 WARN_ON(!(hdr->seq_ctrl &
1086 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1087 /*
1088 * This was a fragment of a frame, received while
1089 * a block-ack session was active. That cannot be
1090 * right, so terminate the session.
1091 */
a93e3644 1092 mutex_lock(&local->sta_mtx);
875ae5f6 1093 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1094 if (sta) {
1095 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1096 IEEE80211_QOS_CTL_TID_MASK;
1097
1098 __ieee80211_stop_rx_ba_session(
1099 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1100 WLAN_REASON_QSTA_REQUIRE_SETUP,
1101 true);
344eec67 1102 }
a93e3644 1103 mutex_unlock(&local->sta_mtx);
bed7ee6e 1104 } else switch (sdata->vif.type) {
1fa57d01
JB		 1105 case NL80211_IFTYPE_STATION:
1106 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1107 break;
1108 case NL80211_IFTYPE_ADHOC:
1109 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1110 break;
1111 case NL80211_IFTYPE_MESH_POINT:
1112 if (!ieee80211_vif_is_mesh(&sdata->vif))
1113 break;
1114 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1115 break;
1116 default:
1117 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1118 break;
1119 }
36b3a628
JB		 1120
1121 kfree_skb(skb);
1fa57d01
JB		 1122 }
1123
1124 /* then other type-dependent work */
1125 switch (sdata->vif.type) {
1126 case NL80211_IFTYPE_STATION:
1127 ieee80211_sta_work(sdata);
1128 break;
1129 case NL80211_IFTYPE_ADHOC:
1130 ieee80211_ibss_work(sdata);
1131 break;
1132 case NL80211_IFTYPE_MESH_POINT:
1133 if (!ieee80211_vif_is_mesh(&sdata->vif))
1134 break;
1135 ieee80211_mesh_work(sdata);
1136 break;
1137 default:
1138 break;
1139 }
1140}
1141
04ecd257
JB		 1142static void ieee80211_recalc_smps_work(struct work_struct *work)
1143{
1144 struct ieee80211_sub_if_data *sdata =
1145 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1146
1147 ieee80211_recalc_smps(sdata);
1148}
1fa57d01 1149
75636525
JB		 1150/*
1151 * Helper function to initialise an interface to a specific type.
1152 */
1153static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1154 enum nl80211_iftype type)
f0706e82 1155{
75636525
JB		 1156 /* clear type-dependent union */
1157 memset(&sdata->u, 0, sizeof(sdata->u));
1158
1159 /* and set some type-dependent values */
1160 sdata->vif.type = type;
2ca27bcf 1161 sdata->vif.p2p = false;
60719ffd 1162 sdata->wdev.iftype = type;
75636525 1163
a621fa4d
JB		 1164 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1165 sdata->control_port_no_encrypt = false;
1166
b53be792
SW		 1167 sdata->noack_map = 0;
1168
f142c6b9
JB		 1169 /* only monitor/p2p-device differ */
1170 if (sdata->dev) {
1171 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1172 sdata->dev->type = ARPHRD_ETHER;
1173 }
75636525 1174
35f20c14 1175 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1176 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1177 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1178
75636525 1179 switch (type) {
2ca27bcf
JB		 1180 case NL80211_IFTYPE_P2P_GO:
1181 type = NL80211_IFTYPE_AP;
1182 sdata->vif.type = type;
1183 sdata->vif.p2p = true;
1184 /* fall through */
05c914fe 1185 case NL80211_IFTYPE_AP:
d012a605 1186 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1187 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1188 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1189 break;
2ca27bcf
JB		 1190 case NL80211_IFTYPE_P2P_CLIENT:
1191 type = NL80211_IFTYPE_STATION;
1192 sdata->vif.type = type;
1193 sdata->vif.p2p = true;
1194 /* fall through */
05c914fe 1195 case NL80211_IFTYPE_STATION:
ad2d223a 1196 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1197 ieee80211_sta_setup_sdata(sdata);
472dbc45 1198 break;
46900298 1199 case NL80211_IFTYPE_ADHOC:
ad2d223a 1200 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1201 ieee80211_ibss_setup_sdata(sdata);
1202 break;
05c914fe 1203 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1204 if (ieee80211_vif_is_mesh(&sdata->vif))
1205 ieee80211_mesh_init_sdata(sdata);
1206 break;
05c914fe 1207 case NL80211_IFTYPE_MONITOR:
75636525 1208 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1209 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1210 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1211 MONITOR_FLAG_OTHER_BSS;
1212 break;
05c914fe 1213 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1214 sdata->vif.bss_conf.bssid = NULL;
1215 break;
05c914fe 1216 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1217 break;
98104fde 1218 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1219 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1220 break;
05c914fe 1221 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1222 case NUM_NL80211_IFTYPES:
75636525
JB		 1223 BUG();
1224 break;
1225 }
1226
1227 ieee80211_debugfs_add_netdev(sdata);
1228}
1229
34d4bc4d
JB		 1230static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1231 enum nl80211_iftype type)
1232{
1233 struct ieee80211_local *local = sdata->local;
1234 int ret, err;
2ca27bcf
JB		 1235 enum nl80211_iftype internal_type = type;
1236 bool p2p = false;
34d4bc4d
JB		 1237
1238 ASSERT_RTNL();
1239
1240 if (!local->ops->change_interface)
1241 return -EBUSY;
1242
1243 switch (sdata->vif.type) {
1244 case NL80211_IFTYPE_AP:
1245 case NL80211_IFTYPE_STATION:
1246 case NL80211_IFTYPE_ADHOC:
1247 /*
1248 * Could maybe also all others here?
1249 * Just not sure how that interacts
1250 * with the RX/config path e.g. for
1251 * mesh.
1252 */
1253 break;
1254 default:
1255 return -EBUSY;
1256 }
1257
1258 switch (type) {
1259 case NL80211_IFTYPE_AP:
1260 case NL80211_IFTYPE_STATION:
1261 case NL80211_IFTYPE_ADHOC:
1262 /*
1263 * Could probably support everything
1264 * but WDS here (WDS do_open can fail
1265 * under memory pressure, which this
1266 * code isn't prepared to handle).
1267 */
1268 break;
2ca27bcf
JB		 1269 case NL80211_IFTYPE_P2P_CLIENT:
1270 p2p = true;
1271 internal_type = NL80211_IFTYPE_STATION;
1272 break;
1273 case NL80211_IFTYPE_P2P_GO:
1274 p2p = true;
1275 internal_type = NL80211_IFTYPE_AP;
1276 break;
34d4bc4d
JB		 1277 default:
1278 return -EBUSY;
1279 }
1280
2ca27bcf 1281 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1282 if (ret)
1283 return ret;
1284
1285 ieee80211_do_stop(sdata, false);
1286
f142c6b9 1287 ieee80211_teardown_sdata(sdata);
34d4bc4d 1288
2ca27bcf 1289 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1290 if (ret)
1291 type = sdata->vif.type;
1292
3a25a8c8
JB		 1293 /*
1294 * Ignore return value here, there's not much we can do since
1295 * the driver changed the interface type internally already.
1296 * The warnings will hopefully make driver authors fix it :-)
1297 */
1298 ieee80211_check_queues(sdata);
1299
34d4bc4d
JB		 1300 ieee80211_setup_sdata(sdata, type);
1301
f142c6b9 1302 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1303 WARN(err, "type change: do_open returned %d", err);
1304
1305 return ret;
1306}
1307
f3947e2d 1308int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1309 enum nl80211_iftype type)
75636525 1310{
34d4bc4d
JB		 1311 int ret;
1312
f3947e2d
JB		 1313 ASSERT_RTNL();
1314
2ca27bcf 1315 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1316 return 0;
1317
34d4bc4d
JB		 1318 if (ieee80211_sdata_running(sdata)) {
1319 ret = ieee80211_runtime_change_iftype(sdata, type);
1320 if (ret)
1321 return ret;
1322 } else {
1323 /* Purge and reset type-dependent state. */
f142c6b9 1324 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1325 ieee80211_setup_sdata(sdata, type);
1326 }
75636525
JB		 1327
1328 /* reset some values that shouldn't be kept across type changes */
75636525 1329 sdata->drop_unencrypted = 0;
9bc383de
JB		 1330 if (type == NL80211_IFTYPE_STATION)
1331 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1332
1333 return 0;
f0706e82
JB		 1334}
1335
fa9029f8 1336static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1337 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1338{
1339 struct ieee80211_sub_if_data *sdata;
1340 u64 mask, start, addr, val, inc;
1341 u8 *m;
1342 u8 tmp_addr[ETH_ALEN];
1343 int i;
1344
1345 /* default ... something at least */
f142c6b9 1346 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1347
1348 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1349 local->hw.wiphy->n_addresses <= 1)
1350 return;
1351
fa9029f8
JB		 1352 mutex_lock(&local->iflist_mtx);
1353
1354 switch (type) {
1355 case NL80211_IFTYPE_MONITOR:
1356 /* doesn't matter */
1357 break;
1358 case NL80211_IFTYPE_WDS:
1359 case NL80211_IFTYPE_AP_VLAN:
1360 /* match up with an AP interface */
1361 list_for_each_entry(sdata, &local->interfaces, list) {
1362 if (sdata->vif.type != NL80211_IFTYPE_AP)
1363 continue;
f142c6b9 1364 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1365 break;
1366 }
1367 /* keep default if no AP interface present */
1368 break;
6d71117a
JB		 1369 case NL80211_IFTYPE_P2P_CLIENT:
1370 case NL80211_IFTYPE_P2P_GO:
1371 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1372 list_for_each_entry(sdata, &local->interfaces, list) {
1373 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1374 continue;
1375 if (!ieee80211_sdata_running(sdata))
1376 continue;
1377 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1378 goto out_unlock;
1379 }
1380 }
1381 /* otherwise fall through */
fa9029f8
JB		 1382 default:
1383 /* assign a new address if possible -- try n_addresses first */
1384 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1385 bool used = false;
1386
1387 list_for_each_entry(sdata, &local->interfaces, list) {
1388 if (memcmp(local->hw.wiphy->addresses[i].addr,
1389 sdata->vif.addr, ETH_ALEN) == 0) {
1390 used = true;
1391 break;
1392 }
1393 }
1394
1395 if (!used) {
f142c6b9 1396 memcpy(perm_addr,
fa9029f8
JB		 1397 local->hw.wiphy->addresses[i].addr,
1398 ETH_ALEN);
1399 break;
1400 }
1401 }
1402
1403 /* try mask if available */
1404 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1405 break;
1406
1407 m = local->hw.wiphy->addr_mask;
1408 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1409 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1410 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1411
1412 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1413 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1414 pr_info("not contiguous\n");
fa9029f8
JB		 1415 break;
1416 }
1417
1418 m = local->hw.wiphy->perm_addr;
1419 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1420 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1421 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1422
1423 inc = 1ULL<<__ffs64(mask);
1424 val = (start & mask);
1425 addr = (start & ~mask) | (val & mask);
1426 do {
1427 bool used = false;
1428
1429 tmp_addr[5] = addr >> 0*8;
1430 tmp_addr[4] = addr >> 1*8;
1431 tmp_addr[3] = addr >> 2*8;
1432 tmp_addr[2] = addr >> 3*8;
1433 tmp_addr[1] = addr >> 4*8;
1434 tmp_addr[0] = addr >> 5*8;
1435
1436 val += inc;
1437
1438 list_for_each_entry(sdata, &local->interfaces, list) {
1439 if (memcmp(tmp_addr, sdata->vif.addr,
1440 ETH_ALEN) == 0) {
1441 used = true;
1442 break;
1443 }
1444 }
1445
1446 if (!used) {
f142c6b9 1447 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1448 break;
1449 }
1450 addr = (start & ~mask) | (val & mask);
1451 } while (addr != start);
1452
1453 break;
1454 }
1455
6d71117a 1456 out_unlock:
fa9029f8
JB		 1457 mutex_unlock(&local->iflist_mtx);
1458}
1459
97f97b1f
JB		 1460static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1461{
1462 struct ieee80211_sub_if_data *sdata;
1463
1464 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1465
1466 ieee80211_cleanup_sdata_stas(sdata);
1467}
1468
3e122be0 1469int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1470 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1471 struct vif_params *params)
f0706e82 1472{
f142c6b9 1473 struct net_device *ndev = NULL;
f0706e82 1474 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1475 int ret, i;
ded81f6b 1476 int txqs = 1;
f0706e82
JB		 1477
1478 ASSERT_RTNL();
75636525 1479
f142c6b9
JB		 1480 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1481 struct wireless_dev *wdev;
1482
1483 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1484 GFP_KERNEL);
1485 if (!sdata)
1486 return -ENOMEM;
1487 wdev = &sdata->wdev;
1488
1489 sdata->dev = NULL;
1490 strlcpy(sdata->name, name, IFNAMSIZ);
1491 ieee80211_assign_perm_addr(local, wdev->address, type);
1492 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1493 } else {
1494 if (local->hw.queues >= IEEE80211_NUM_ACS)
1495 txqs = IEEE80211_NUM_ACS;
1496
1497 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1498 local->hw.vif_data_size,
1499 name, ieee80211_if_setup, txqs, 1);
1500 if (!ndev)
1501 return -ENOMEM;
1502 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1503
1504 ndev->needed_headroom = local->tx_headroom +
1505 4*6 /* four MAC addresses */
1506 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1507 + 6 /* mesh */
1508 + 8 /* rfc1042/bridge tunnel */
1509 - ETH_HLEN /* ethernet hard_header_len */
1510 + IEEE80211_ENCRYPT_HEADROOM;
1511 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1512
1513 ret = dev_alloc_name(ndev, ndev->name);
1514 if (ret < 0) {
1515 free_netdev(ndev);
1516 return ret;
1517 }
1518
1519 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1520 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1521 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1522
1523 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1524 sdata = netdev_priv(ndev);
1525 ndev->ieee80211_ptr = &sdata->wdev;
1526 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1527 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1528
1529 sdata->dev = ndev;
1530 }
75636525
JB		 1531
1532 /* initialise type-independent data */
f0706e82 1533 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1534 sdata->local = local;
75636525
JB		 1535
1536 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1537 skb_queue_head_init(&sdata->fragments[i].skb_list);
1538
1539 INIT_LIST_HEAD(&sdata->key_list);
1540
97f97b1f
JB		 1541 spin_lock_init(&sdata->cleanup_stations_lock);
1542 INIT_LIST_HEAD(&sdata->cleanup_stations);
1543 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1544 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1545 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1546 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1547 ieee80211_delayed_tailroom_dec);
97f97b1f 1548
37eb0b16
JM		 1549 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1550 struct ieee80211_supported_band *sband;
1551 sband = local->hw.wiphy->bands[i];
1552 sdata->rc_rateidx_mask[i] =
1553 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1554 if (sband)
1555 memcpy(sdata->rc_rateidx_mcs_mask[i],
1556 sband->ht_cap.mcs.rx_mask,
1557 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1558 else
1559 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1560 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1561 }
75636525 1562
3a25a8c8
JB		 1563 ieee80211_set_default_queues(sdata);
1564
1ea6f9c0
JB		 1565 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1566 sdata->user_power_level = local->user_power_level;
1567
75636525
JB		 1568 /* setup type-dependent data */
1569 ieee80211_setup_sdata(sdata, type);
f0706e82 1570
f142c6b9
JB		 1571 if (ndev) {
1572 if (params) {
1573 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1574 if (type == NL80211_IFTYPE_STATION)
1575 sdata->u.mgd.use_4addr = params->use_4addr;
1576 }
9bc383de 1577
f142c6b9 1578 ndev->features |= local->hw.netdev_features;
72d78728 1579
f142c6b9
JB		 1580 ret = register_netdevice(ndev);
1581 if (ret) {
1582 free_netdev(ndev);
1583 return ret;
1584 }
1585 }
f0706e82 1586
c771c9d8 1587 mutex_lock(&local->iflist_mtx);
79010420 1588 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1589 mutex_unlock(&local->iflist_mtx);
79010420 1590
84efbb84
JB		 1591 if (new_wdev)
1592 *new_wdev = &sdata->wdev;
f0706e82 1593
f0706e82 1594 return 0;
f0706e82
JB		 1595}
1596
f698d856 1597void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1598{
f0706e82 1599 ASSERT_RTNL();
11a843b7 1600
c771c9d8 1601 mutex_lock(&sdata->local->iflist_mtx);
75636525 1602 list_del_rcu(&sdata->list);
c771c9d8
JB		 1603 mutex_unlock(&sdata->local->iflist_mtx);
1604
75636525 1605 synchronize_rcu();
f142c6b9
JB		 1606
1607 if (sdata->dev) {
1608 unregister_netdevice(sdata->dev);
1609 } else {
1610 cfg80211_unregister_wdev(&sdata->wdev);
1611 kfree(sdata);
1612 }
1613}
1614
1615void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1616{
1617 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1618 return;
1619 ieee80211_do_stop(sdata, true);
1620 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1621}
1622
75636525
JB		 1623/*
1624 * Remove all interfaces, may only be called at hardware unregistration
1625 * time because it doesn't do RCU-safe list removals.
1626 */
1627void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1628{
75636525 1629 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1630 LIST_HEAD(unreg_list);
f142c6b9 1631 LIST_HEAD(wdev_list);
f0706e82
JB		 1632
1633 ASSERT_RTNL();
1634
efe117ab 1635 mutex_lock(&local->iflist_mtx);
75636525
JB		 1636 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1637 list_del(&sdata->list);
c771c9d8 1638
f142c6b9
JB		 1639 if (sdata->dev)
1640 unregister_netdevice_queue(sdata->dev, &unreg_list);
1641 else
1642 list_add(&sdata->list, &wdev_list);
f0706e82 1643 }
efe117ab
ED		 1644 mutex_unlock(&local->iflist_mtx);
1645 unregister_netdevice_many(&unreg_list);
5f04d506 1646 list_del(&unreg_list);
f142c6b9
JB		 1647
1648 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1649 list_del(&sdata->list);
1650 cfg80211_unregister_wdev(&sdata->wdev);
1651 kfree(sdata);
1652 }
f0706e82 1653}
5cff20e6 1654
47846c9b
JB		 1655static int netdev_notify(struct notifier_block *nb,
1656 unsigned long state,
1657 void *ndev)
1658{
1659 struct net_device *dev = ndev;
1660 struct ieee80211_sub_if_data *sdata;
1661
1662 if (state != NETDEV_CHANGENAME)
1663 return 0;
1664
1665 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1666 return 0;
1667
1668 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1669 return 0;
1670
1671 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1672
2f5265e6 1673 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1674
1675 ieee80211_debugfs_rename_netdev(sdata);
1676 return 0;
1677}
1678
1679static struct notifier_block mac80211_netdev_notifier = {
1680 .notifier_call = netdev_notify,
1681};
1682
1683int ieee80211_iface_init(void)
1684{
1685 return register_netdevice_notifier(&mac80211_netdev_notifier);
1686}
1687
1688void ieee80211_iface_exit(void)
1689{
1690 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1691}
Linux 6.x block layer and io_uring tree(s)