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mac80211: replace some dead code by a warning
[linux-2.6-block.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 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
39ecc01d 95 ieee80211_flush_queues(local, NULL);
cc45ae54
JB		 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
3c3e21e7 349int 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
3c3e21e7 403void 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
29cbe68c 560 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 561 local->fif_pspoll++;
7be5086d 562 local->fif_probe_req++;
e3b90ca2 563
e3b90ca2 564 ieee80211_configure_filter(local);
7be5086d
JB		 565 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
566 local->fif_probe_req++;
a3c9aa51 567 }
e3b90ca2 568
f142c6b9
JB		 569 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
570 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 571 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 572
c405c629
JB		 573 switch (sdata->vif.type) {
574 case NL80211_IFTYPE_STATION:
575 case NL80211_IFTYPE_ADHOC:
576 case NL80211_IFTYPE_AP:
577 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 578 netif_carrier_off(dev);
c405c629 579 break;
1411af15 580 case NL80211_IFTYPE_WDS:
f142c6b9 581 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 582 break;
c405c629 583 default:
a2310824
JB		 584 /* not reached */
585 WARN_ON(1);
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
c8f994ee 697 ieee80211_roc_purge(local, sdata);
af6b6374 698
572078be
JB		 699 if (sdata->vif.type == NL80211_IFTYPE_STATION)
700 ieee80211_mgd_stop(sdata);
701
0d143fe1
JB		 702 /*
703 * Remove all stations associated with this interface.
704 *
705 * This must be done before calling ops->remove_interface()
706 * because otherwise we can later invoke ops->sta_notify()
707 * whenever the STAs are removed, and that invalidates driver
708 * assumptions about always getting a vif pointer that is valid
709 * (because if we remove a STA after ops->remove_interface()
710 * the driver will have removed the vif info already!)
711 *
09f4114e
JB		 712 * This is relevant only in WDS mode, in all other modes we've
713 * already removed all stations when disconnecting or similar,
714 * so warn otherwise.
051007d9
JB		 715 *
716 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 717 */
051007d9 718 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 719 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
720 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 721
afdc7c18 722 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 723 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
724 atomic_dec(&local->iff_allmultis);
725
726 if (sdata->flags & IEEE80211_SDATA_PROMISC)
727 atomic_dec(&local->iff_promiscs);
728
7be5086d 729 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 730 local->fif_pspoll--;
7be5086d
JB		 731 local->fif_probe_req--;
732 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
733 local->fif_probe_req--;
734 }
e3b90ca2 735
f142c6b9
JB		 736 if (sdata->dev) {
737 netif_addr_lock_bh(sdata->dev);
738 spin_lock_bh(&local->filter_lock);
739 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
740 sdata->dev->addr_len);
741 spin_unlock_bh(&local->filter_lock);
742 netif_addr_unlock_bh(sdata->dev);
f142c6b9 743 }
3ac64bee 744
7cbf0ba5
VN		 745 del_timer_sync(&local->dynamic_ps_timer);
746 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 747
04ecd257
JB		 748 cancel_work_sync(&sdata->recalc_smps);
749
164eb02d
SW		 750 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
751
752 if (sdata->wdev.cac_started) {
b2c0958b 753 WARN_ON(local->suspended);
164eb02d
SW		 754 mutex_lock(&local->iflist_mtx);
755 ieee80211_vif_release_channel(sdata);
756 mutex_unlock(&local->iflist_mtx);
757 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
758 GFP_KERNEL);
759 }
760
0d143fe1
JB		 761 /* APs need special treatment */
762 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 763 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 764
765 /* down all dependent devices, that is VLANs */
57c9fff3 766 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 767 u.vlan.list)
768 dev_close(vlan->dev);
769 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 770 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
771 /* remove all packets in parent bc_buf pointing to this dev */
772 ps = &sdata->bss->ps;
773
774 spin_lock_irqsave(&ps->bc_buf.lock, flags);
775 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
776 if (skb->dev == sdata->dev) {
777 __skb_unlink(skb, &ps->bc_buf);
778 local->total_ps_buffered--;
779 ieee80211_free_txskb(&local->hw, skb);
780 }
781 }
782 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 783 }
784
34d4bc4d
JB		 785 if (going_down)
786 local->open_count--;
0d143fe1
JB		 787
788 switch (sdata->vif.type) {
789 case NL80211_IFTYPE_AP_VLAN:
790 list_del(&sdata->u.vlan.list);
4d76d21b 791 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 792 /* no need to tell driver */
793 break;
794 case NL80211_IFTYPE_MONITOR:
795 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
796 local->cooked_mntrs--;
797 break;
798 }
799
800 local->monitors--;
e8975581 801 if (local->monitors == 0) {
0869aea0
JB		 802 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
803 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 804 }
0d143fe1 805
85416a4f 806 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 807 break;
f142c6b9
JB		 808 case NL80211_IFTYPE_P2P_DEVICE:
809 /* relies on synchronize_rcu() below */
810 rcu_assign_pointer(local->p2p_sdata, NULL);
811 /* fall through */
0d143fe1 812 default:
0b7dff4f 813 cancel_work_sync(&sdata->work);
35f20c14
JB		 814 /*
815 * When we get here, the interface is marked down.
75de9113
JB		 816 *
817 * sta_info_flush_cleanup() requires rcu_barrier()
818 * first to wait for the station call_rcu() calls
819 * to complete, here we need at least sychronize_rcu()
820 * it to wait for the RX path in case it is using the
821 * interface and enqueuing frames at this very time on
822 * another CPU.
35f20c14 823 */
75de9113 824 rcu_barrier();
051007d9
JB		 825 sta_info_flush_cleanup(sdata);
826
b9dcf712
JB		 827 /*
828 * Free all remaining keys, there shouldn't be any,
7b4396bd 829 * except maybe in WDS mode?
b9dcf712 830 */
ad0e2b5a 831 ieee80211_free_keys(sdata);
b9dcf712 832
1861b845
JB		 833 /* fall through */
834 case NL80211_IFTYPE_AP:
835 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 836 }
837
838 sdata->bss = NULL;
839
5061b0c2
JB		 840 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
841 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
842 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
843 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
844 if (info->control.vif == &sdata->vif) {
845 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 846 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 847 }
848 }
849 }
850 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 851
b2c0958b
JB		 852 if (local->open_count == 0)
853 ieee80211_clear_tx_pending(local);
854
855 /*
856 * If the interface goes down while suspended, presumably because
857 * the device was unplugged and that happens before our resume,
858 * then the driver is already unconfigured and the remainder of
859 * this function isn't needed.
860 * XXX: what about WoWLAN? If the device has software state, e.g.
861 * memory allocated, it might expect teardown commands from
862 * mac80211 here?
863 */
864 if (local->suspended) {
865 WARN_ON(local->wowlan);
866 WARN_ON(rtnl_dereference(local->monitor_sdata));
867 return;
868 }
869
870 switch (sdata->vif.type) {
871 case NL80211_IFTYPE_AP_VLAN:
872 break;
873 case NL80211_IFTYPE_MONITOR:
874 if (local->monitors == 0)
875 ieee80211_del_virtual_monitor(local);
876
877 mutex_lock(&local->mtx);
878 ieee80211_recalc_idle(local);
879 mutex_unlock(&local->mtx);
880 break;
881 default:
882 if (going_down)
883 drv_remove_interface(local, sdata);
884 }
885
886 ieee80211_recalc_ps(local, -1);
887
888 if (local->open_count == 0) {
889 ieee80211_stop_device(local);
890
891 /* no reconfiguring after stop! */
892 return;
893 }
894
895 /* do after stop to avoid reconfiguring when we stop anyway */
896 ieee80211_configure_filter(local);
897 ieee80211_hw_config(local, hw_reconf_flags);
898
899 if (local->monitors == local->open_count)
075e0847 900 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 901}
902
903static int ieee80211_stop(struct net_device *dev)
904{
905 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
906
907 ieee80211_do_stop(sdata, true);
5061b0c2 908
0d143fe1
JB		 909 return 0;
910}
911
912static void ieee80211_set_multicast_list(struct net_device *dev)
913{
0d143fe1 914 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 915 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 916 int allmulti, promisc, sdata_allmulti, sdata_promisc;
917
918 allmulti = !!(dev->flags & IFF_ALLMULTI);
919 promisc = !!(dev->flags & IFF_PROMISC);
920 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
921 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
922
923 if (allmulti != sdata_allmulti) {
924 if (dev->flags & IFF_ALLMULTI)
925 atomic_inc(&local->iff_allmultis);
926 else
927 atomic_dec(&local->iff_allmultis);
928 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
929 }
930
931 if (promisc != sdata_promisc) {
932 if (dev->flags & IFF_PROMISC)
933 atomic_inc(&local->iff_promiscs);
934 else
935 atomic_dec(&local->iff_promiscs);
936 sdata->flags ^= IEEE80211_SDATA_PROMISC;
937 }
488b366a
AB		 938
939 /*
940 * TODO: If somebody needs this on AP interfaces,
941 * it can be enabled easily but multicast
942 * addresses from VLANs need to be synced.
943 */
944 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
945 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
946 sdata->vif.type != NL80211_IFTYPE_AP)
947 drv_set_multicast_list(local, sdata, &dev->mc);
948
3b8d81e0 949 spin_lock_bh(&local->filter_lock);
22bedad3 950 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 951 spin_unlock_bh(&local->filter_lock);
3ac64bee 952 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 953}
954
75636525
JB		 955/*
956 * Called when the netdev is removed or, by the code below, before
957 * the interface type changes.
958 */
f142c6b9 959static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 960{
75636525 961 int flushed;
f0706e82
JB		 962 int i;
963
75636525
JB		 964 /* free extra data */
965 ieee80211_free_keys(sdata);
966
aee14ceb
JM		 967 ieee80211_debugfs_remove_netdev(sdata);
968
f0706e82 969 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 970 __skb_queue_purge(&sdata->fragments[i].skb_list);
971 sdata->fragment_next = 0;
11a843b7 972
b9dcf712
JB		 973 if (ieee80211_vif_is_mesh(&sdata->vif))
974 mesh_rmc_free(sdata);
75636525 975
b998e8bb 976 flushed = sta_info_flush(sdata);
75636525 977 WARN_ON(flushed);
f0706e82
JB		 978}
979
f142c6b9
JB		 980static void ieee80211_uninit(struct net_device *dev)
981{
982 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
983}
984
cf0277e7
JB		 985static u16 ieee80211_netdev_select_queue(struct net_device *dev,
986 struct sk_buff *skb)
987{
988 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
989}
990
587e729e
JB		 991static const struct net_device_ops ieee80211_dataif_ops = {
992 .ndo_open = ieee80211_open,
993 .ndo_stop = ieee80211_stop,
f142c6b9 994 .ndo_uninit = ieee80211_uninit,
587e729e 995 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 996 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 997 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 998 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 999 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1000};
1001
cf0277e7
JB		 1002static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1003 struct sk_buff *skb)
1004{
1005 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1006 struct ieee80211_local *local = sdata->local;
1007 struct ieee80211_hdr *hdr;
1008 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1009
32c5057b 1010 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1011 return 0;
1012
1013 if (skb->len < 4 ||
b49bb574 1014 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1015 return 0; /* doesn't matter, frame will be dropped */
1016
b49bb574 1017 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1018
00e96dec 1019 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1020}
1021
587e729e
JB		 1022static const struct net_device_ops ieee80211_monitorif_ops = {
1023 .ndo_open = ieee80211_open,
1024 .ndo_stop = ieee80211_stop,
f142c6b9 1025 .ndo_uninit = ieee80211_uninit,
587e729e 1026 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1027 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1028 .ndo_change_mtu = ieee80211_change_mtu,
1029 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1030 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1031};
1032
1033static void ieee80211_if_setup(struct net_device *dev)
1034{
1035 ether_setup(dev);
550fd08c 1036 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1037 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1038 dev->destructor = free_netdev;
1039}
1040
1fa57d01
JB		 1041static void ieee80211_iface_work(struct work_struct *work)
1042{
1043 struct ieee80211_sub_if_data *sdata =
1044 container_of(work, struct ieee80211_sub_if_data, work);
1045 struct ieee80211_local *local = sdata->local;
1046 struct sk_buff *skb;
344eec67 1047 struct sta_info *sta;
c1475ca9 1048 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1049
1050 if (!ieee80211_sdata_running(sdata))
1051 return;
1052
1053 if (local->scanning)
1054 return;
1055
1056 /*
1057 * ieee80211_queue_work() should have picked up most cases,
1058 * here we'll pick the rest.
1059 */
1060 if (WARN(local->suspended,
1061 "interface work scheduled while going to suspend\n"))
1062 return;
1063
1064 /* first process frames */
1065 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1066 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1067
c1475ca9
JB		 1068 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1069 ra_tid = (void *)&skb->cb;
1070 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1071 ra_tid->tid);
1072 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1073 ra_tid = (void *)&skb->cb;
1074 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1075 ra_tid->tid);
1076 } else if (ieee80211_is_action(mgmt->frame_control) &&
1077 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1078 int len = skb->len;
bed7ee6e 1079
a93e3644 1080 mutex_lock(&local->sta_mtx);
875ae5f6 1081 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1082 if (sta) {
1083 switch (mgmt->u.action.u.addba_req.action_code) {
1084 case WLAN_ACTION_ADDBA_REQ:
1085 ieee80211_process_addba_request(
1086 local, sta, mgmt, len);
1087 break;
1088 case WLAN_ACTION_ADDBA_RESP:
1089 ieee80211_process_addba_resp(local, sta,
1090 mgmt, len);
1091 break;
1092 case WLAN_ACTION_DELBA:
1093 ieee80211_process_delba(sdata, sta,
1094 mgmt, len);
1095 break;
1096 default:
1097 WARN_ON(1);
1098 break;
1099 }
1100 }
a93e3644 1101 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1102 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1103 struct ieee80211_hdr *hdr = (void *)mgmt;
1104 /*
1105 * So the frame isn't mgmt, but frame_control
1106 * is at the right place anyway, of course, so
1107 * the if statement is correct.
1108 *
1109 * Warn if we have other data frame types here,
1110 * they must not get here.
1111 */
1112 WARN_ON(hdr->frame_control &
1113 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1114 WARN_ON(!(hdr->seq_ctrl &
1115 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1116 /*
1117 * This was a fragment of a frame, received while
1118 * a block-ack session was active. That cannot be
1119 * right, so terminate the session.
1120 */
a93e3644 1121 mutex_lock(&local->sta_mtx);
875ae5f6 1122 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1123 if (sta) {
1124 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1125 IEEE80211_QOS_CTL_TID_MASK;
1126
1127 __ieee80211_stop_rx_ba_session(
1128 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1129 WLAN_REASON_QSTA_REQUIRE_SETUP,
1130 true);
344eec67 1131 }
a93e3644 1132 mutex_unlock(&local->sta_mtx);
bed7ee6e 1133 } else switch (sdata->vif.type) {
1fa57d01
JB		 1134 case NL80211_IFTYPE_STATION:
1135 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1136 break;
1137 case NL80211_IFTYPE_ADHOC:
1138 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1139 break;
1140 case NL80211_IFTYPE_MESH_POINT:
1141 if (!ieee80211_vif_is_mesh(&sdata->vif))
1142 break;
1143 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1144 break;
1145 default:
1146 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1147 break;
1148 }
36b3a628
JB		 1149
1150 kfree_skb(skb);
1fa57d01
JB		 1151 }
1152
1153 /* then other type-dependent work */
1154 switch (sdata->vif.type) {
1155 case NL80211_IFTYPE_STATION:
1156 ieee80211_sta_work(sdata);
1157 break;
1158 case NL80211_IFTYPE_ADHOC:
1159 ieee80211_ibss_work(sdata);
1160 break;
1161 case NL80211_IFTYPE_MESH_POINT:
1162 if (!ieee80211_vif_is_mesh(&sdata->vif))
1163 break;
1164 ieee80211_mesh_work(sdata);
1165 break;
1166 default:
1167 break;
1168 }
1169}
1170
04ecd257
JB		 1171static void ieee80211_recalc_smps_work(struct work_struct *work)
1172{
1173 struct ieee80211_sub_if_data *sdata =
1174 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1175
1176 ieee80211_recalc_smps(sdata);
1177}
1fa57d01 1178
75636525
JB		 1179/*
1180 * Helper function to initialise an interface to a specific type.
1181 */
1182static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1183 enum nl80211_iftype type)
f0706e82 1184{
75636525
JB		 1185 /* clear type-dependent union */
1186 memset(&sdata->u, 0, sizeof(sdata->u));
1187
1188 /* and set some type-dependent values */
1189 sdata->vif.type = type;
2ca27bcf 1190 sdata->vif.p2p = false;
60719ffd 1191 sdata->wdev.iftype = type;
75636525 1192
a621fa4d
JB		 1193 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1194 sdata->control_port_no_encrypt = false;
1195
b53be792
SW		 1196 sdata->noack_map = 0;
1197
f142c6b9
JB		 1198 /* only monitor/p2p-device differ */
1199 if (sdata->dev) {
1200 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1201 sdata->dev->type = ARPHRD_ETHER;
1202 }
75636525 1203
35f20c14 1204 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1205 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1206 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1207
75636525 1208 switch (type) {
2ca27bcf
JB		 1209 case NL80211_IFTYPE_P2P_GO:
1210 type = NL80211_IFTYPE_AP;
1211 sdata->vif.type = type;
1212 sdata->vif.p2p = true;
1213 /* fall through */
05c914fe 1214 case NL80211_IFTYPE_AP:
d012a605 1215 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1216 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1217 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1218 break;
2ca27bcf
JB		 1219 case NL80211_IFTYPE_P2P_CLIENT:
1220 type = NL80211_IFTYPE_STATION;
1221 sdata->vif.type = type;
1222 sdata->vif.p2p = true;
1223 /* fall through */
05c914fe 1224 case NL80211_IFTYPE_STATION:
ad2d223a 1225 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1226 ieee80211_sta_setup_sdata(sdata);
472dbc45 1227 break;
46900298 1228 case NL80211_IFTYPE_ADHOC:
ad2d223a 1229 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1230 ieee80211_ibss_setup_sdata(sdata);
1231 break;
05c914fe 1232 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1233 if (ieee80211_vif_is_mesh(&sdata->vif))
1234 ieee80211_mesh_init_sdata(sdata);
1235 break;
05c914fe 1236 case NL80211_IFTYPE_MONITOR:
75636525 1237 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1238 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1239 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1240 MONITOR_FLAG_OTHER_BSS;
1241 break;
05c914fe 1242 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1243 sdata->vif.bss_conf.bssid = NULL;
1244 break;
05c914fe 1245 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1246 break;
98104fde 1247 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1248 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1249 break;
05c914fe 1250 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1251 case NUM_NL80211_IFTYPES:
75636525
JB		 1252 BUG();
1253 break;
1254 }
1255
1256 ieee80211_debugfs_add_netdev(sdata);
1257}
1258
34d4bc4d
JB		 1259static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1260 enum nl80211_iftype type)
1261{
1262 struct ieee80211_local *local = sdata->local;
1263 int ret, err;
2ca27bcf
JB		 1264 enum nl80211_iftype internal_type = type;
1265 bool p2p = false;
34d4bc4d
JB		 1266
1267 ASSERT_RTNL();
1268
1269 if (!local->ops->change_interface)
1270 return -EBUSY;
1271
1272 switch (sdata->vif.type) {
1273 case NL80211_IFTYPE_AP:
1274 case NL80211_IFTYPE_STATION:
1275 case NL80211_IFTYPE_ADHOC:
1276 /*
1277 * Could maybe also all others here?
1278 * Just not sure how that interacts
1279 * with the RX/config path e.g. for
1280 * mesh.
1281 */
1282 break;
1283 default:
1284 return -EBUSY;
1285 }
1286
1287 switch (type) {
1288 case NL80211_IFTYPE_AP:
1289 case NL80211_IFTYPE_STATION:
1290 case NL80211_IFTYPE_ADHOC:
1291 /*
1292 * Could probably support everything
1293 * but WDS here (WDS do_open can fail
1294 * under memory pressure, which this
1295 * code isn't prepared to handle).
1296 */
1297 break;
2ca27bcf
JB		 1298 case NL80211_IFTYPE_P2P_CLIENT:
1299 p2p = true;
1300 internal_type = NL80211_IFTYPE_STATION;
1301 break;
1302 case NL80211_IFTYPE_P2P_GO:
1303 p2p = true;
1304 internal_type = NL80211_IFTYPE_AP;
1305 break;
34d4bc4d
JB		 1306 default:
1307 return -EBUSY;
1308 }
1309
2ca27bcf 1310 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1311 if (ret)
1312 return ret;
1313
1314 ieee80211_do_stop(sdata, false);
1315
f142c6b9 1316 ieee80211_teardown_sdata(sdata);
34d4bc4d 1317
2ca27bcf 1318 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1319 if (ret)
1320 type = sdata->vif.type;
1321
3a25a8c8
JB		 1322 /*
1323 * Ignore return value here, there's not much we can do since
1324 * the driver changed the interface type internally already.
1325 * The warnings will hopefully make driver authors fix it :-)
1326 */
1327 ieee80211_check_queues(sdata);
1328
34d4bc4d
JB		 1329 ieee80211_setup_sdata(sdata, type);
1330
f142c6b9 1331 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1332 WARN(err, "type change: do_open returned %d", err);
1333
1334 return ret;
1335}
1336
f3947e2d 1337int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1338 enum nl80211_iftype type)
75636525 1339{
34d4bc4d
JB		 1340 int ret;
1341
f3947e2d
JB		 1342 ASSERT_RTNL();
1343
2ca27bcf 1344 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1345 return 0;
1346
34d4bc4d
JB		 1347 if (ieee80211_sdata_running(sdata)) {
1348 ret = ieee80211_runtime_change_iftype(sdata, type);
1349 if (ret)
1350 return ret;
1351 } else {
1352 /* Purge and reset type-dependent state. */
f142c6b9 1353 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1354 ieee80211_setup_sdata(sdata, type);
1355 }
75636525
JB		 1356
1357 /* reset some values that shouldn't be kept across type changes */
75636525 1358 sdata->drop_unencrypted = 0;
9bc383de
JB		 1359 if (type == NL80211_IFTYPE_STATION)
1360 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1361
1362 return 0;
f0706e82
JB		 1363}
1364
fa9029f8 1365static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1366 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1367{
1368 struct ieee80211_sub_if_data *sdata;
1369 u64 mask, start, addr, val, inc;
1370 u8 *m;
1371 u8 tmp_addr[ETH_ALEN];
1372 int i;
1373
1374 /* default ... something at least */
f142c6b9 1375 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1376
1377 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1378 local->hw.wiphy->n_addresses <= 1)
1379 return;
1380
fa9029f8
JB		 1381 mutex_lock(&local->iflist_mtx);
1382
1383 switch (type) {
1384 case NL80211_IFTYPE_MONITOR:
1385 /* doesn't matter */
1386 break;
1387 case NL80211_IFTYPE_WDS:
1388 case NL80211_IFTYPE_AP_VLAN:
1389 /* match up with an AP interface */
1390 list_for_each_entry(sdata, &local->interfaces, list) {
1391 if (sdata->vif.type != NL80211_IFTYPE_AP)
1392 continue;
f142c6b9 1393 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1394 break;
1395 }
1396 /* keep default if no AP interface present */
1397 break;
6d71117a
JB		 1398 case NL80211_IFTYPE_P2P_CLIENT:
1399 case NL80211_IFTYPE_P2P_GO:
1400 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1401 list_for_each_entry(sdata, &local->interfaces, list) {
1402 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1403 continue;
1404 if (!ieee80211_sdata_running(sdata))
1405 continue;
1406 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1407 goto out_unlock;
1408 }
1409 }
1410 /* otherwise fall through */
fa9029f8
JB		 1411 default:
1412 /* assign a new address if possible -- try n_addresses first */
1413 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1414 bool used = false;
1415
1416 list_for_each_entry(sdata, &local->interfaces, list) {
1417 if (memcmp(local->hw.wiphy->addresses[i].addr,
1418 sdata->vif.addr, ETH_ALEN) == 0) {
1419 used = true;
1420 break;
1421 }
1422 }
1423
1424 if (!used) {
f142c6b9 1425 memcpy(perm_addr,
fa9029f8
JB		 1426 local->hw.wiphy->addresses[i].addr,
1427 ETH_ALEN);
1428 break;
1429 }
1430 }
1431
1432 /* try mask if available */
1433 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1434 break;
1435
1436 m = local->hw.wiphy->addr_mask;
1437 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1438 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1439 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1440
1441 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1442 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1443 pr_info("not contiguous\n");
fa9029f8
JB		 1444 break;
1445 }
1446
1447 m = local->hw.wiphy->perm_addr;
1448 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1449 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1450 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1451
1452 inc = 1ULL<<__ffs64(mask);
1453 val = (start & mask);
1454 addr = (start & ~mask) | (val & mask);
1455 do {
1456 bool used = false;
1457
1458 tmp_addr[5] = addr >> 0*8;
1459 tmp_addr[4] = addr >> 1*8;
1460 tmp_addr[3] = addr >> 2*8;
1461 tmp_addr[2] = addr >> 3*8;
1462 tmp_addr[1] = addr >> 4*8;
1463 tmp_addr[0] = addr >> 5*8;
1464
1465 val += inc;
1466
1467 list_for_each_entry(sdata, &local->interfaces, list) {
1468 if (memcmp(tmp_addr, sdata->vif.addr,
1469 ETH_ALEN) == 0) {
1470 used = true;
1471 break;
1472 }
1473 }
1474
1475 if (!used) {
f142c6b9 1476 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1477 break;
1478 }
1479 addr = (start & ~mask) | (val & mask);
1480 } while (addr != start);
1481
1482 break;
1483 }
1484
6d71117a 1485 out_unlock:
fa9029f8
JB		 1486 mutex_unlock(&local->iflist_mtx);
1487}
1488
97f97b1f
JB		 1489static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1490{
1491 struct ieee80211_sub_if_data *sdata;
1492
1493 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1494
1495 ieee80211_cleanup_sdata_stas(sdata);
1496}
1497
3e122be0 1498int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1499 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1500 struct vif_params *params)
f0706e82 1501{
f142c6b9 1502 struct net_device *ndev = NULL;
f0706e82 1503 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1504 int ret, i;
ded81f6b 1505 int txqs = 1;
f0706e82
JB		 1506
1507 ASSERT_RTNL();
75636525 1508
f142c6b9
JB		 1509 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1510 struct wireless_dev *wdev;
1511
1512 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1513 GFP_KERNEL);
1514 if (!sdata)
1515 return -ENOMEM;
1516 wdev = &sdata->wdev;
1517
1518 sdata->dev = NULL;
1519 strlcpy(sdata->name, name, IFNAMSIZ);
1520 ieee80211_assign_perm_addr(local, wdev->address, type);
1521 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1522 } else {
1523 if (local->hw.queues >= IEEE80211_NUM_ACS)
1524 txqs = IEEE80211_NUM_ACS;
1525
1526 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1527 local->hw.vif_data_size,
1528 name, ieee80211_if_setup, txqs, 1);
1529 if (!ndev)
1530 return -ENOMEM;
1531 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1532
1533 ndev->needed_headroom = local->tx_headroom +
1534 4*6 /* four MAC addresses */
1535 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1536 + 6 /* mesh */
1537 + 8 /* rfc1042/bridge tunnel */
1538 - ETH_HLEN /* ethernet hard_header_len */
1539 + IEEE80211_ENCRYPT_HEADROOM;
1540 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1541
1542 ret = dev_alloc_name(ndev, ndev->name);
1543 if (ret < 0) {
1544 free_netdev(ndev);
1545 return ret;
1546 }
1547
1548 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1549 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1550 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1551
1552 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1553 sdata = netdev_priv(ndev);
1554 ndev->ieee80211_ptr = &sdata->wdev;
1555 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1556 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1557
1558 sdata->dev = ndev;
1559 }
75636525
JB		 1560
1561 /* initialise type-independent data */
f0706e82 1562 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1563 sdata->local = local;
75636525
JB		 1564
1565 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1566 skb_queue_head_init(&sdata->fragments[i].skb_list);
1567
1568 INIT_LIST_HEAD(&sdata->key_list);
1569
97f97b1f
JB		 1570 spin_lock_init(&sdata->cleanup_stations_lock);
1571 INIT_LIST_HEAD(&sdata->cleanup_stations);
1572 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1573 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1574 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1575 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1576 ieee80211_delayed_tailroom_dec);
97f97b1f 1577
37eb0b16
JM		 1578 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1579 struct ieee80211_supported_band *sband;
1580 sband = local->hw.wiphy->bands[i];
1581 sdata->rc_rateidx_mask[i] =
1582 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1583 if (sband)
1584 memcpy(sdata->rc_rateidx_mcs_mask[i],
1585 sband->ht_cap.mcs.rx_mask,
1586 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1587 else
1588 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1589 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1590 }
75636525 1591
3a25a8c8
JB		 1592 ieee80211_set_default_queues(sdata);
1593
1ea6f9c0
JB		 1594 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1595 sdata->user_power_level = local->user_power_level;
1596
75636525
JB		 1597 /* setup type-dependent data */
1598 ieee80211_setup_sdata(sdata, type);
f0706e82 1599
f142c6b9
JB		 1600 if (ndev) {
1601 if (params) {
1602 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1603 if (type == NL80211_IFTYPE_STATION)
1604 sdata->u.mgd.use_4addr = params->use_4addr;
1605 }
9bc383de 1606
f142c6b9 1607 ndev->features |= local->hw.netdev_features;
72d78728 1608
f142c6b9
JB		 1609 ret = register_netdevice(ndev);
1610 if (ret) {
1611 free_netdev(ndev);
1612 return ret;
1613 }
1614 }
f0706e82 1615
c771c9d8 1616 mutex_lock(&local->iflist_mtx);
79010420 1617 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1618 mutex_unlock(&local->iflist_mtx);
79010420 1619
84efbb84
JB		 1620 if (new_wdev)
1621 *new_wdev = &sdata->wdev;
f0706e82 1622
f0706e82 1623 return 0;
f0706e82
JB		 1624}
1625
f698d856 1626void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1627{
f0706e82 1628 ASSERT_RTNL();
11a843b7 1629
c771c9d8 1630 mutex_lock(&sdata->local->iflist_mtx);
75636525 1631 list_del_rcu(&sdata->list);
c771c9d8
JB		 1632 mutex_unlock(&sdata->local->iflist_mtx);
1633
75636525 1634 synchronize_rcu();
f142c6b9
JB		 1635
1636 if (sdata->dev) {
1637 unregister_netdevice(sdata->dev);
1638 } else {
1639 cfg80211_unregister_wdev(&sdata->wdev);
1640 kfree(sdata);
1641 }
1642}
1643
1644void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1645{
1646 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1647 return;
1648 ieee80211_do_stop(sdata, true);
1649 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1650}
1651
75636525
JB		 1652/*
1653 * Remove all interfaces, may only be called at hardware unregistration
1654 * time because it doesn't do RCU-safe list removals.
1655 */
1656void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1657{
75636525 1658 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1659 LIST_HEAD(unreg_list);
f142c6b9 1660 LIST_HEAD(wdev_list);
f0706e82
JB		 1661
1662 ASSERT_RTNL();
1663
efe117ab 1664 mutex_lock(&local->iflist_mtx);
75636525
JB		 1665 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1666 list_del(&sdata->list);
c771c9d8 1667
f142c6b9
JB		 1668 if (sdata->dev)
1669 unregister_netdevice_queue(sdata->dev, &unreg_list);
1670 else
1671 list_add(&sdata->list, &wdev_list);
f0706e82 1672 }
efe117ab
ED		 1673 mutex_unlock(&local->iflist_mtx);
1674 unregister_netdevice_many(&unreg_list);
5f04d506 1675 list_del(&unreg_list);
f142c6b9
JB		 1676
1677 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1678 list_del(&sdata->list);
1679 cfg80211_unregister_wdev(&sdata->wdev);
1680 kfree(sdata);
1681 }
f0706e82 1682}
5cff20e6 1683
47846c9b
JB		 1684static int netdev_notify(struct notifier_block *nb,
1685 unsigned long state,
1686 void *ndev)
1687{
1688 struct net_device *dev = ndev;
1689 struct ieee80211_sub_if_data *sdata;
1690
1691 if (state != NETDEV_CHANGENAME)
1692 return 0;
1693
1694 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1695 return 0;
1696
1697 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1698 return 0;
1699
1700 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1701
2f5265e6 1702 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1703
1704 ieee80211_debugfs_rename_netdev(sdata);
1705 return 0;
1706}
1707
1708static struct notifier_block mac80211_netdev_notifier = {
1709 .notifier_call = netdev_notify,
1710};
1711
1712int ieee80211_iface_init(void)
1713{
1714 return register_netdevice_notifier(&mac80211_netdev_notifier);
1715}
1716
1717void ieee80211_iface_exit(void)
1718{
1719 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1720}
Linux 6.x block layer and io_uring tree(s)