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mac80211: indicate admission control in TX queue parameters
[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
382a103b 81u32 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;
8b305780 352 int ret;
4b6f1dd6
JB		 353
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
355 return 0;
356
8b305780 357 ASSERT_RTNL();
685fb72b 358
4b6f1dd6 359 if (local->monitor_sdata)
8b305780 360 return 0;
4b6f1dd6
JB		 361
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 363 if (!sdata)
364 return -ENOMEM;
4b6f1dd6
JB		 365
366 /* set up data */
367 sdata->local = local;
368 sdata->vif.type = NL80211_IFTYPE_MONITOR;
369 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
370 wiphy_name(local->hw.wiphy));
371
3a25a8c8
JB		 372 ieee80211_set_default_queues(sdata);
373
4b6f1dd6
JB		 374 ret = drv_add_interface(local, sdata);
375 if (WARN_ON(ret)) {
376 /* ok .. stupid driver, it asked for this! */
377 kfree(sdata);
8b305780 378 return ret;
4b6f1dd6
JB		 379 }
380
3a25a8c8
JB		 381 ret = ieee80211_check_queues(sdata);
382 if (ret) {
383 kfree(sdata);
8b305780 384 return ret;
3a25a8c8
JB		 385 }
386
4bf88530 387 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 388 IEEE80211_CHANCTX_EXCLUSIVE);
389 if (ret) {
390 drv_remove_interface(local, sdata);
391 kfree(sdata);
8b305780 392 return ret;
55de908a
JB		 393 }
394
8b305780 395 mutex_lock(&local->iflist_mtx);
4b6f1dd6 396 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 397 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 398
399 return 0;
4b6f1dd6
JB		 400}
401
3c3e21e7 402void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 403{
404 struct ieee80211_sub_if_data *sdata;
405
406 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
407 return;
408
8b305780
JB		 409 ASSERT_RTNL();
410
685fb72b 411 mutex_lock(&local->iflist_mtx);
4b6f1dd6 412
685fb72b
JB		 413 sdata = rcu_dereference_protected(local->monitor_sdata,
414 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 415 if (!sdata) {
416 mutex_unlock(&local->iflist_mtx);
417 return;
418 }
4b6f1dd6
JB		 419
420 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 421 mutex_unlock(&local->iflist_mtx);
422
4b6f1dd6
JB		 423 synchronize_net();
424
55de908a
JB		 425 ieee80211_vif_release_channel(sdata);
426
4b6f1dd6
JB		 427 drv_remove_interface(local, sdata);
428
429 kfree(sdata);
430}
431
34d4bc4d
JB		 432/*
433 * NOTE: Be very careful when changing this function, it must NOT return
434 * an error on interface type changes that have been pre-checked, so most
435 * checks should be in ieee80211_check_concurrent_iface.
436 */
f142c6b9 437int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 438{
f142c6b9
JB		 439 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
440 struct net_device *dev = wdev->netdev;
87490f6d
JB		 441 struct ieee80211_local *local = sdata->local;
442 struct sta_info *sta;
443 u32 changed = 0;
444 int res;
445 u32 hw_reconf_flags = 0;
446
0d143fe1
JB		 447 switch (sdata->vif.type) {
448 case NL80211_IFTYPE_WDS:
449 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
450 return -ENOLINK;
451 break;
665c93a9
JB		 452 case NL80211_IFTYPE_AP_VLAN: {
453 struct ieee80211_sub_if_data *master;
454
0d143fe1
JB		 455 if (!sdata->bss)
456 return -ENOLINK;
665c93a9 457
0d143fe1 458 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 459
460 master = container_of(sdata->bss,
461 struct ieee80211_sub_if_data, u.ap);
462 sdata->control_port_protocol =
463 master->control_port_protocol;
464 sdata->control_port_no_encrypt =
465 master->control_port_no_encrypt;
0d143fe1 466 break;
665c93a9 467 }
0d143fe1
JB		 468 case NL80211_IFTYPE_AP:
469 sdata->bss = &sdata->u.ap;
470 break;
471 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 472 case NL80211_IFTYPE_STATION:
473 case NL80211_IFTYPE_MONITOR:
474 case NL80211_IFTYPE_ADHOC:
f142c6b9 475 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 476 /* no special treatment */
477 break;
478 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 479 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 480 case NL80211_IFTYPE_P2P_CLIENT:
481 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 482 /* cannot happen */
483 WARN_ON(1);
484 break;
485 }
486
487 if (local->open_count == 0) {
24487981 488 res = drv_start(local);
0d143fe1
JB		 489 if (res)
490 goto err_del_bss;
e8975581
JB		 491 /* we're brought up, everything changes */
492 hw_reconf_flags = ~0;
1f87f7d3 493 ieee80211_led_radio(local, true);
67408c8c
JB		 494 ieee80211_mod_tpt_led_trig(local,
495 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 496 }
497
498 /*
bf533e0b
JB		 499 * Copy the hopefully now-present MAC address to
500 * this interface, if it has the special null one.
0d143fe1 501 */
f142c6b9 502 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 503 memcpy(dev->dev_addr,
504 local->hw.wiphy->perm_addr,
505 ETH_ALEN);
506 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
507
508 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 509 res = -EADDRNOTAVAIL;
510 goto err_stop;
0adc23f5 511 }
0d143fe1
JB		 512 }
513
0d143fe1
JB		 514 switch (sdata->vif.type) {
515 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 516 /* no need to tell driver, but set carrier and chanctx */
517 if (rtnl_dereference(sdata->bss->beacon)) {
518 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 519 netif_carrier_on(dev);
4d76d21b 520 } else {
3edaf3e6 521 netif_carrier_off(dev);
4d76d21b 522 }
0d143fe1
JB		 523 break;
524 case NL80211_IFTYPE_MONITOR:
525 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
526 local->cooked_mntrs++;
527 break;
528 }
529
075e0847
JB		 530 if (local->monitors == 0 && local->open_count == 0) {
531 res = ieee80211_add_virtual_monitor(local);
532 if (res)
533 goto err_stop;
534 }
535
0d143fe1
JB		 536 /* must be before the call to ieee80211_configure_filter */
537 local->monitors++;
e8975581 538 if (local->monitors == 1) {
0869aea0
JB		 539 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
540 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 541 }
0d143fe1 542
85416a4f 543 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 544 ieee80211_configure_filter(local);
801d929c
FF		 545 mutex_lock(&local->mtx);
546 ieee80211_recalc_idle(local);
547 mutex_unlock(&local->mtx);
53e9b1de
DG		 548
549 netif_carrier_on(dev);
0d143fe1 550 break;
0d143fe1 551 default:
34d4bc4d 552 if (coming_up) {
075e0847
JB		 553 ieee80211_del_virtual_monitor(local);
554
7b7eab6f 555 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 556 if (res)
557 goto err_stop;
3a25a8c8
JB		 558 res = ieee80211_check_queues(sdata);
559 if (res)
560 goto err_del_interface;
34d4bc4d 561 }
0d143fe1 562
29cbe68c 563 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 564 local->fif_pspoll++;
7be5086d 565 local->fif_probe_req++;
e3b90ca2 566
e3b90ca2 567 ieee80211_configure_filter(local);
7be5086d
JB		 568 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
569 local->fif_probe_req++;
a3c9aa51 570 }
e3b90ca2 571
f142c6b9
JB		 572 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
573 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 574 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 575
c405c629
JB		 576 switch (sdata->vif.type) {
577 case NL80211_IFTYPE_STATION:
578 case NL80211_IFTYPE_ADHOC:
579 case NL80211_IFTYPE_AP:
580 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 581 netif_carrier_off(dev);
c405c629 582 break;
1411af15 583 case NL80211_IFTYPE_WDS:
f142c6b9 584 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 585 break;
c405c629 586 default:
a2310824
JB		 587 /* not reached */
588 WARN_ON(1);
c405c629 589 }
59034591
EP		 590
591 /*
592 * set default queue parameters so drivers don't
593 * need to initialise the hardware if the hardware
594 * doesn't start up with sane defaults
595 */
3abead59 596 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 597 }
598
2d2080c3
JB		 599 set_bit(SDATA_STATE_RUNNING, &sdata->state);
600
0d143fe1
JB		 601 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
602 /* Create STA entry for the WDS peer */
603 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
604 GFP_KERNEL);
605 if (!sta) {
606 res = -ENOMEM;
607 goto err_del_interface;
608 }
609
83d5cc01
JB		 610 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
611 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
612 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 613
614 res = sta_info_insert(sta);
615 if (res) {
616 /* STA has been freed */
617 goto err_del_interface;
618 }
1be7fe8d
BJ		 619
620 rate_control_rate_init(sta);
1411af15 621 netif_carrier_on(dev);
f142c6b9
JB		 622 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
623 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 624 }
625
0d143fe1
JB		 626 /*
627 * set_multicast_list will be invoked by the networking core
628 * which will check whether any increments here were done in
629 * error and sync them down to the hardware as filter flags.
630 */
631 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
632 atomic_inc(&local->iff_allmultis);
633
634 if (sdata->flags & IEEE80211_SDATA_PROMISC)
635 atomic_inc(&local->iff_promiscs);
636
34d4bc4d
JB		 637 if (coming_up)
638 local->open_count++;
639
59034591 640 if (hw_reconf_flags)
e8975581 641 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 642
10f644a4 643 ieee80211_recalc_ps(local, -1);
965bedad 644
2b730daa
JB		 645 if (dev) {
646 unsigned long flags;
647 int n_acs = IEEE80211_NUM_ACS;
648 int ac;
649
650 if (local->hw.queues < IEEE80211_NUM_ACS)
651 n_acs = 1;
652
653 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
654 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
655 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
656 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
657 for (ac = 0; ac < n_acs; ac++) {
658 int ac_queue = sdata->vif.hw_queue[ac];
659
660 if (local->queue_stop_reasons[ac_queue] == 0 &&
661 skb_queue_empty(&local->pending[ac_queue]))
662 netif_start_subqueue(dev, ac);
663 }
664 }
665 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
666 }
0d143fe1
JB		 667
668 return 0;
669 err_del_interface:
7b7eab6f 670 drv_remove_interface(local, sdata);
0d143fe1 671 err_stop:
24487981
JB		 672 if (!local->open_count)
673 drv_stop(local);
0d143fe1
JB		 674 err_del_bss:
675 sdata->bss = NULL;
676 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
677 list_del(&sdata->u.vlan.list);
4d6c36fa 678 /* might already be clear but that doesn't matter */
2d2080c3 679 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 680 return res;
681}
682
34d4bc4d 683static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 684{
685 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 686 int err;
687
688 /* fail early if user set an invalid address */
2fcf2824 689 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 690 return -EADDRNOTAVAIL;
691
692 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
693 if (err)
694 return err;
695
f142c6b9 696 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 697}
698
699static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
700 bool going_down)
701{
0d143fe1 702 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 703 unsigned long flags;
704 struct sk_buff *skb, *tmp;
e8975581 705 u32 hw_reconf_flags = 0;
09f4114e 706 int i, flushed;
397a7a24 707 struct ps_data *ps;
0d143fe1 708
c29acf20
RM		 709 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
710
e2fd5dbc 711 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 712 ieee80211_scan_cancel(local);
713
0d143fe1
JB		 714 /*
715 * Stop TX on this interface first.
716 */
f142c6b9
JB		 717 if (sdata->dev)
718 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 719
c8f994ee 720 ieee80211_roc_purge(local, sdata);
af6b6374 721
572078be
JB		 722 if (sdata->vif.type == NL80211_IFTYPE_STATION)
723 ieee80211_mgd_stop(sdata);
724
0d143fe1
JB		 725 /*
726 * Remove all stations associated with this interface.
727 *
728 * This must be done before calling ops->remove_interface()
729 * because otherwise we can later invoke ops->sta_notify()
730 * whenever the STAs are removed, and that invalidates driver
731 * assumptions about always getting a vif pointer that is valid
732 * (because if we remove a STA after ops->remove_interface()
733 * the driver will have removed the vif info already!)
734 *
09f4114e
JB		 735 * This is relevant only in WDS mode, in all other modes we've
736 * already removed all stations when disconnecting or similar,
737 * so warn otherwise.
051007d9
JB		 738 *
739 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 740 */
051007d9 741 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 742 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
743 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 744
afdc7c18 745 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 746 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
747 atomic_dec(&local->iff_allmultis);
748
749 if (sdata->flags & IEEE80211_SDATA_PROMISC)
750 atomic_dec(&local->iff_promiscs);
751
7be5086d 752 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 753 local->fif_pspoll--;
7be5086d
JB		 754 local->fif_probe_req--;
755 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
756 local->fif_probe_req--;
757 }
e3b90ca2 758
f142c6b9
JB		 759 if (sdata->dev) {
760 netif_addr_lock_bh(sdata->dev);
761 spin_lock_bh(&local->filter_lock);
762 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
763 sdata->dev->addr_len);
764 spin_unlock_bh(&local->filter_lock);
765 netif_addr_unlock_bh(sdata->dev);
f142c6b9 766 }
3ac64bee 767
7cbf0ba5
VN		 768 del_timer_sync(&local->dynamic_ps_timer);
769 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 770
04ecd257
JB		 771 cancel_work_sync(&sdata->recalc_smps);
772
164eb02d
SW		 773 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
774
775 if (sdata->wdev.cac_started) {
b2c0958b 776 WARN_ON(local->suspended);
164eb02d
SW		 777 mutex_lock(&local->iflist_mtx);
778 ieee80211_vif_release_channel(sdata);
779 mutex_unlock(&local->iflist_mtx);
780 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
781 GFP_KERNEL);
782 }
783
0d143fe1
JB		 784 /* APs need special treatment */
785 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 786 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 787
788 /* down all dependent devices, that is VLANs */
57c9fff3 789 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 790 u.vlan.list)
791 dev_close(vlan->dev);
792 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 793 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
794 /* remove all packets in parent bc_buf pointing to this dev */
795 ps = &sdata->bss->ps;
796
797 spin_lock_irqsave(&ps->bc_buf.lock, flags);
798 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
799 if (skb->dev == sdata->dev) {
800 __skb_unlink(skb, &ps->bc_buf);
801 local->total_ps_buffered--;
802 ieee80211_free_txskb(&local->hw, skb);
803 }
804 }
805 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 806 }
807
34d4bc4d
JB		 808 if (going_down)
809 local->open_count--;
0d143fe1
JB		 810
811 switch (sdata->vif.type) {
812 case NL80211_IFTYPE_AP_VLAN:
813 list_del(&sdata->u.vlan.list);
4d76d21b 814 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 815 /* no need to tell driver */
816 break;
817 case NL80211_IFTYPE_MONITOR:
818 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
819 local->cooked_mntrs--;
820 break;
821 }
822
823 local->monitors--;
e8975581 824 if (local->monitors == 0) {
0869aea0
JB		 825 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
826 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 827 }
0d143fe1 828
85416a4f 829 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 830 break;
f142c6b9
JB		 831 case NL80211_IFTYPE_P2P_DEVICE:
832 /* relies on synchronize_rcu() below */
833 rcu_assign_pointer(local->p2p_sdata, NULL);
834 /* fall through */
0d143fe1 835 default:
0b7dff4f 836 cancel_work_sync(&sdata->work);
35f20c14
JB		 837 /*
838 * When we get here, the interface is marked down.
75de9113
JB		 839 *
840 * sta_info_flush_cleanup() requires rcu_barrier()
841 * first to wait for the station call_rcu() calls
842 * to complete, here we need at least sychronize_rcu()
843 * it to wait for the RX path in case it is using the
844 * interface and enqueuing frames at this very time on
845 * another CPU.
35f20c14 846 */
75de9113 847 rcu_barrier();
051007d9
JB		 848 sta_info_flush_cleanup(sdata);
849
b9dcf712
JB		 850 /*
851 * Free all remaining keys, there shouldn't be any,
7b4396bd 852 * except maybe in WDS mode?
b9dcf712 853 */
ad0e2b5a 854 ieee80211_free_keys(sdata);
b9dcf712 855
1861b845
JB		 856 /* fall through */
857 case NL80211_IFTYPE_AP:
858 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 859 }
860
861 sdata->bss = NULL;
862
5061b0c2
JB		 863 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
864 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
865 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
866 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
867 if (info->control.vif == &sdata->vif) {
868 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 869 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 870 }
871 }
872 }
873 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 874
b2c0958b
JB		 875 if (local->open_count == 0)
876 ieee80211_clear_tx_pending(local);
877
878 /*
879 * If the interface goes down while suspended, presumably because
880 * the device was unplugged and that happens before our resume,
881 * then the driver is already unconfigured and the remainder of
882 * this function isn't needed.
883 * XXX: what about WoWLAN? If the device has software state, e.g.
884 * memory allocated, it might expect teardown commands from
885 * mac80211 here?
886 */
887 if (local->suspended) {
888 WARN_ON(local->wowlan);
889 WARN_ON(rtnl_dereference(local->monitor_sdata));
890 return;
891 }
892
893 switch (sdata->vif.type) {
894 case NL80211_IFTYPE_AP_VLAN:
895 break;
896 case NL80211_IFTYPE_MONITOR:
897 if (local->monitors == 0)
898 ieee80211_del_virtual_monitor(local);
899
900 mutex_lock(&local->mtx);
901 ieee80211_recalc_idle(local);
902 mutex_unlock(&local->mtx);
903 break;
904 default:
905 if (going_down)
906 drv_remove_interface(local, sdata);
907 }
908
909 ieee80211_recalc_ps(local, -1);
910
911 if (local->open_count == 0) {
912 ieee80211_stop_device(local);
913
914 /* no reconfiguring after stop! */
915 return;
916 }
917
918 /* do after stop to avoid reconfiguring when we stop anyway */
919 ieee80211_configure_filter(local);
920 ieee80211_hw_config(local, hw_reconf_flags);
921
922 if (local->monitors == local->open_count)
075e0847 923 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 924}
925
926static int ieee80211_stop(struct net_device *dev)
927{
928 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
929
930 ieee80211_do_stop(sdata, true);
5061b0c2 931
0d143fe1
JB		 932 return 0;
933}
934
935static void ieee80211_set_multicast_list(struct net_device *dev)
936{
0d143fe1 937 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 938 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 939 int allmulti, promisc, sdata_allmulti, sdata_promisc;
940
941 allmulti = !!(dev->flags & IFF_ALLMULTI);
942 promisc = !!(dev->flags & IFF_PROMISC);
943 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
944 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
945
946 if (allmulti != sdata_allmulti) {
947 if (dev->flags & IFF_ALLMULTI)
948 atomic_inc(&local->iff_allmultis);
949 else
950 atomic_dec(&local->iff_allmultis);
951 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
952 }
953
954 if (promisc != sdata_promisc) {
955 if (dev->flags & IFF_PROMISC)
956 atomic_inc(&local->iff_promiscs);
957 else
958 atomic_dec(&local->iff_promiscs);
959 sdata->flags ^= IEEE80211_SDATA_PROMISC;
960 }
488b366a
AB		 961
962 /*
963 * TODO: If somebody needs this on AP interfaces,
964 * it can be enabled easily but multicast
965 * addresses from VLANs need to be synced.
966 */
967 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
968 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
969 sdata->vif.type != NL80211_IFTYPE_AP)
970 drv_set_multicast_list(local, sdata, &dev->mc);
971
3b8d81e0 972 spin_lock_bh(&local->filter_lock);
22bedad3 973 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 974 spin_unlock_bh(&local->filter_lock);
3ac64bee 975 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 976}
977
75636525
JB		 978/*
979 * Called when the netdev is removed or, by the code below, before
980 * the interface type changes.
981 */
f142c6b9 982static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 983{
75636525 984 int flushed;
f0706e82
JB		 985 int i;
986
75636525
JB		 987 /* free extra data */
988 ieee80211_free_keys(sdata);
989
aee14ceb
JM		 990 ieee80211_debugfs_remove_netdev(sdata);
991
f0706e82 992 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 993 __skb_queue_purge(&sdata->fragments[i].skb_list);
994 sdata->fragment_next = 0;
11a843b7 995
b9dcf712
JB		 996 if (ieee80211_vif_is_mesh(&sdata->vif))
997 mesh_rmc_free(sdata);
75636525 998
b998e8bb 999 flushed = sta_info_flush(sdata);
75636525 1000 WARN_ON(flushed);
f0706e82
JB		 1001}
1002
f142c6b9
JB		 1003static void ieee80211_uninit(struct net_device *dev)
1004{
1005 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1006}
1007
cf0277e7
JB		 1008static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1009 struct sk_buff *skb)
1010{
1011 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1012}
1013
587e729e
JB		 1014static const struct net_device_ops ieee80211_dataif_ops = {
1015 .ndo_open = ieee80211_open,
1016 .ndo_stop = ieee80211_stop,
f142c6b9 1017 .ndo_uninit = ieee80211_uninit,
587e729e 1018 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1019 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1020 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1021 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1022 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1023};
1024
cf0277e7
JB		 1025static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1026 struct sk_buff *skb)
1027{
1028 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1029 struct ieee80211_local *local = sdata->local;
1030 struct ieee80211_hdr *hdr;
1031 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1032
32c5057b 1033 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1034 return 0;
1035
1036 if (skb->len < 4 ||
b49bb574 1037 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1038 return 0; /* doesn't matter, frame will be dropped */
1039
b49bb574 1040 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1041
00e96dec 1042 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1043}
1044
587e729e
JB		 1045static const struct net_device_ops ieee80211_monitorif_ops = {
1046 .ndo_open = ieee80211_open,
1047 .ndo_stop = ieee80211_stop,
f142c6b9 1048 .ndo_uninit = ieee80211_uninit,
587e729e 1049 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1050 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1051 .ndo_change_mtu = ieee80211_change_mtu,
1052 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1053 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1054};
1055
1056static void ieee80211_if_setup(struct net_device *dev)
1057{
1058 ether_setup(dev);
550fd08c 1059 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1060 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1061 dev->destructor = free_netdev;
1062}
1063
1fa57d01
JB		 1064static void ieee80211_iface_work(struct work_struct *work)
1065{
1066 struct ieee80211_sub_if_data *sdata =
1067 container_of(work, struct ieee80211_sub_if_data, work);
1068 struct ieee80211_local *local = sdata->local;
1069 struct sk_buff *skb;
344eec67 1070 struct sta_info *sta;
c1475ca9 1071 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1072
1073 if (!ieee80211_sdata_running(sdata))
1074 return;
1075
1076 if (local->scanning)
1077 return;
1078
1079 /*
1080 * ieee80211_queue_work() should have picked up most cases,
1081 * here we'll pick the rest.
1082 */
1083 if (WARN(local->suspended,
1084 "interface work scheduled while going to suspend\n"))
1085 return;
1086
1087 /* first process frames */
1088 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1089 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1090
c1475ca9
JB		 1091 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1092 ra_tid = (void *)&skb->cb;
1093 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1094 ra_tid->tid);
1095 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1096 ra_tid = (void *)&skb->cb;
1097 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1098 ra_tid->tid);
1099 } else if (ieee80211_is_action(mgmt->frame_control) &&
1100 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1101 int len = skb->len;
bed7ee6e 1102
a93e3644 1103 mutex_lock(&local->sta_mtx);
875ae5f6 1104 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1105 if (sta) {
1106 switch (mgmt->u.action.u.addba_req.action_code) {
1107 case WLAN_ACTION_ADDBA_REQ:
1108 ieee80211_process_addba_request(
1109 local, sta, mgmt, len);
1110 break;
1111 case WLAN_ACTION_ADDBA_RESP:
1112 ieee80211_process_addba_resp(local, sta,
1113 mgmt, len);
1114 break;
1115 case WLAN_ACTION_DELBA:
1116 ieee80211_process_delba(sdata, sta,
1117 mgmt, len);
1118 break;
1119 default:
1120 WARN_ON(1);
1121 break;
1122 }
1123 }
a93e3644 1124 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1125 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1126 struct ieee80211_hdr *hdr = (void *)mgmt;
1127 /*
1128 * So the frame isn't mgmt, but frame_control
1129 * is at the right place anyway, of course, so
1130 * the if statement is correct.
1131 *
1132 * Warn if we have other data frame types here,
1133 * they must not get here.
1134 */
1135 WARN_ON(hdr->frame_control &
1136 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1137 WARN_ON(!(hdr->seq_ctrl &
1138 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1139 /*
1140 * This was a fragment of a frame, received while
1141 * a block-ack session was active. That cannot be
1142 * right, so terminate the session.
1143 */
a93e3644 1144 mutex_lock(&local->sta_mtx);
875ae5f6 1145 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1146 if (sta) {
1147 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1148 IEEE80211_QOS_CTL_TID_MASK;
1149
1150 __ieee80211_stop_rx_ba_session(
1151 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1152 WLAN_REASON_QSTA_REQUIRE_SETUP,
1153 true);
344eec67 1154 }
a93e3644 1155 mutex_unlock(&local->sta_mtx);
bed7ee6e 1156 } else switch (sdata->vif.type) {
1fa57d01
JB		 1157 case NL80211_IFTYPE_STATION:
1158 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1159 break;
1160 case NL80211_IFTYPE_ADHOC:
1161 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1162 break;
1163 case NL80211_IFTYPE_MESH_POINT:
1164 if (!ieee80211_vif_is_mesh(&sdata->vif))
1165 break;
1166 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1167 break;
1168 default:
1169 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1170 break;
1171 }
36b3a628
JB		 1172
1173 kfree_skb(skb);
1fa57d01
JB		 1174 }
1175
1176 /* then other type-dependent work */
1177 switch (sdata->vif.type) {
1178 case NL80211_IFTYPE_STATION:
1179 ieee80211_sta_work(sdata);
1180 break;
1181 case NL80211_IFTYPE_ADHOC:
1182 ieee80211_ibss_work(sdata);
1183 break;
1184 case NL80211_IFTYPE_MESH_POINT:
1185 if (!ieee80211_vif_is_mesh(&sdata->vif))
1186 break;
1187 ieee80211_mesh_work(sdata);
1188 break;
1189 default:
1190 break;
1191 }
1192}
1193
04ecd257
JB		 1194static void ieee80211_recalc_smps_work(struct work_struct *work)
1195{
1196 struct ieee80211_sub_if_data *sdata =
1197 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1198
1199 ieee80211_recalc_smps(sdata);
1200}
1fa57d01 1201
75636525
JB		 1202/*
1203 * Helper function to initialise an interface to a specific type.
1204 */
1205static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1206 enum nl80211_iftype type)
f0706e82 1207{
75636525
JB		 1208 /* clear type-dependent union */
1209 memset(&sdata->u, 0, sizeof(sdata->u));
1210
1211 /* and set some type-dependent values */
1212 sdata->vif.type = type;
2ca27bcf 1213 sdata->vif.p2p = false;
60719ffd 1214 sdata->wdev.iftype = type;
75636525 1215
a621fa4d
JB		 1216 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1217 sdata->control_port_no_encrypt = false;
1218
b53be792
SW		 1219 sdata->noack_map = 0;
1220
f142c6b9
JB		 1221 /* only monitor/p2p-device differ */
1222 if (sdata->dev) {
1223 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1224 sdata->dev->type = ARPHRD_ETHER;
1225 }
75636525 1226
35f20c14 1227 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1228 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1229 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1230
75636525 1231 switch (type) {
2ca27bcf
JB		 1232 case NL80211_IFTYPE_P2P_GO:
1233 type = NL80211_IFTYPE_AP;
1234 sdata->vif.type = type;
1235 sdata->vif.p2p = true;
1236 /* fall through */
05c914fe 1237 case NL80211_IFTYPE_AP:
d012a605 1238 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1239 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1240 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1241 break;
2ca27bcf
JB		 1242 case NL80211_IFTYPE_P2P_CLIENT:
1243 type = NL80211_IFTYPE_STATION;
1244 sdata->vif.type = type;
1245 sdata->vif.p2p = true;
1246 /* fall through */
05c914fe 1247 case NL80211_IFTYPE_STATION:
ad2d223a 1248 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1249 ieee80211_sta_setup_sdata(sdata);
472dbc45 1250 break;
46900298 1251 case NL80211_IFTYPE_ADHOC:
ad2d223a 1252 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1253 ieee80211_ibss_setup_sdata(sdata);
1254 break;
05c914fe 1255 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1256 if (ieee80211_vif_is_mesh(&sdata->vif))
1257 ieee80211_mesh_init_sdata(sdata);
1258 break;
05c914fe 1259 case NL80211_IFTYPE_MONITOR:
75636525 1260 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1261 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1262 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1263 MONITOR_FLAG_OTHER_BSS;
1264 break;
05c914fe 1265 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1266 sdata->vif.bss_conf.bssid = NULL;
1267 break;
05c914fe 1268 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1269 break;
98104fde 1270 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1271 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1272 break;
05c914fe 1273 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1274 case NUM_NL80211_IFTYPES:
75636525
JB		 1275 BUG();
1276 break;
1277 }
1278
1279 ieee80211_debugfs_add_netdev(sdata);
1280}
1281
34d4bc4d
JB		 1282static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1283 enum nl80211_iftype type)
1284{
1285 struct ieee80211_local *local = sdata->local;
1286 int ret, err;
2ca27bcf
JB		 1287 enum nl80211_iftype internal_type = type;
1288 bool p2p = false;
34d4bc4d
JB		 1289
1290 ASSERT_RTNL();
1291
1292 if (!local->ops->change_interface)
1293 return -EBUSY;
1294
1295 switch (sdata->vif.type) {
1296 case NL80211_IFTYPE_AP:
1297 case NL80211_IFTYPE_STATION:
1298 case NL80211_IFTYPE_ADHOC:
1299 /*
1300 * Could maybe also all others here?
1301 * Just not sure how that interacts
1302 * with the RX/config path e.g. for
1303 * mesh.
1304 */
1305 break;
1306 default:
1307 return -EBUSY;
1308 }
1309
1310 switch (type) {
1311 case NL80211_IFTYPE_AP:
1312 case NL80211_IFTYPE_STATION:
1313 case NL80211_IFTYPE_ADHOC:
1314 /*
1315 * Could probably support everything
1316 * but WDS here (WDS do_open can fail
1317 * under memory pressure, which this
1318 * code isn't prepared to handle).
1319 */
1320 break;
2ca27bcf
JB		 1321 case NL80211_IFTYPE_P2P_CLIENT:
1322 p2p = true;
1323 internal_type = NL80211_IFTYPE_STATION;
1324 break;
1325 case NL80211_IFTYPE_P2P_GO:
1326 p2p = true;
1327 internal_type = NL80211_IFTYPE_AP;
1328 break;
34d4bc4d
JB		 1329 default:
1330 return -EBUSY;
1331 }
1332
2ca27bcf 1333 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1334 if (ret)
1335 return ret;
1336
1337 ieee80211_do_stop(sdata, false);
1338
f142c6b9 1339 ieee80211_teardown_sdata(sdata);
34d4bc4d 1340
2ca27bcf 1341 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1342 if (ret)
1343 type = sdata->vif.type;
1344
3a25a8c8
JB		 1345 /*
1346 * Ignore return value here, there's not much we can do since
1347 * the driver changed the interface type internally already.
1348 * The warnings will hopefully make driver authors fix it :-)
1349 */
1350 ieee80211_check_queues(sdata);
1351
34d4bc4d
JB		 1352 ieee80211_setup_sdata(sdata, type);
1353
f142c6b9 1354 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1355 WARN(err, "type change: do_open returned %d", err);
1356
1357 return ret;
1358}
1359
f3947e2d 1360int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1361 enum nl80211_iftype type)
75636525 1362{
34d4bc4d
JB		 1363 int ret;
1364
f3947e2d
JB		 1365 ASSERT_RTNL();
1366
2ca27bcf 1367 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1368 return 0;
1369
34d4bc4d
JB		 1370 if (ieee80211_sdata_running(sdata)) {
1371 ret = ieee80211_runtime_change_iftype(sdata, type);
1372 if (ret)
1373 return ret;
1374 } else {
1375 /* Purge and reset type-dependent state. */
f142c6b9 1376 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1377 ieee80211_setup_sdata(sdata, type);
1378 }
75636525
JB		 1379
1380 /* reset some values that shouldn't be kept across type changes */
75636525 1381 sdata->drop_unencrypted = 0;
9bc383de
JB		 1382 if (type == NL80211_IFTYPE_STATION)
1383 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1384
1385 return 0;
f0706e82
JB		 1386}
1387
fa9029f8 1388static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1389 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1390{
1391 struct ieee80211_sub_if_data *sdata;
1392 u64 mask, start, addr, val, inc;
1393 u8 *m;
1394 u8 tmp_addr[ETH_ALEN];
1395 int i;
1396
1397 /* default ... something at least */
f142c6b9 1398 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1399
1400 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1401 local->hw.wiphy->n_addresses <= 1)
1402 return;
1403
fa9029f8
JB		 1404 mutex_lock(&local->iflist_mtx);
1405
1406 switch (type) {
1407 case NL80211_IFTYPE_MONITOR:
1408 /* doesn't matter */
1409 break;
1410 case NL80211_IFTYPE_WDS:
1411 case NL80211_IFTYPE_AP_VLAN:
1412 /* match up with an AP interface */
1413 list_for_each_entry(sdata, &local->interfaces, list) {
1414 if (sdata->vif.type != NL80211_IFTYPE_AP)
1415 continue;
f142c6b9 1416 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1417 break;
1418 }
1419 /* keep default if no AP interface present */
1420 break;
6d71117a
JB		 1421 case NL80211_IFTYPE_P2P_CLIENT:
1422 case NL80211_IFTYPE_P2P_GO:
1423 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1424 list_for_each_entry(sdata, &local->interfaces, list) {
1425 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1426 continue;
1427 if (!ieee80211_sdata_running(sdata))
1428 continue;
1429 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1430 goto out_unlock;
1431 }
1432 }
1433 /* otherwise fall through */
fa9029f8
JB		 1434 default:
1435 /* assign a new address if possible -- try n_addresses first */
1436 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1437 bool used = false;
1438
1439 list_for_each_entry(sdata, &local->interfaces, list) {
1440 if (memcmp(local->hw.wiphy->addresses[i].addr,
1441 sdata->vif.addr, ETH_ALEN) == 0) {
1442 used = true;
1443 break;
1444 }
1445 }
1446
1447 if (!used) {
f142c6b9 1448 memcpy(perm_addr,
fa9029f8
JB		 1449 local->hw.wiphy->addresses[i].addr,
1450 ETH_ALEN);
1451 break;
1452 }
1453 }
1454
1455 /* try mask if available */
1456 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1457 break;
1458
1459 m = local->hw.wiphy->addr_mask;
1460 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1461 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1462 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1463
1464 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1465 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1466 pr_info("not contiguous\n");
fa9029f8
JB		 1467 break;
1468 }
1469
1470 m = local->hw.wiphy->perm_addr;
1471 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1472 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1473 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1474
1475 inc = 1ULL<<__ffs64(mask);
1476 val = (start & mask);
1477 addr = (start & ~mask) | (val & mask);
1478 do {
1479 bool used = false;
1480
1481 tmp_addr[5] = addr >> 0*8;
1482 tmp_addr[4] = addr >> 1*8;
1483 tmp_addr[3] = addr >> 2*8;
1484 tmp_addr[2] = addr >> 3*8;
1485 tmp_addr[1] = addr >> 4*8;
1486 tmp_addr[0] = addr >> 5*8;
1487
1488 val += inc;
1489
1490 list_for_each_entry(sdata, &local->interfaces, list) {
1491 if (memcmp(tmp_addr, sdata->vif.addr,
1492 ETH_ALEN) == 0) {
1493 used = true;
1494 break;
1495 }
1496 }
1497
1498 if (!used) {
f142c6b9 1499 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1500 break;
1501 }
1502 addr = (start & ~mask) | (val & mask);
1503 } while (addr != start);
1504
1505 break;
1506 }
1507
6d71117a 1508 out_unlock:
fa9029f8
JB		 1509 mutex_unlock(&local->iflist_mtx);
1510}
1511
97f97b1f
JB		 1512static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1513{
1514 struct ieee80211_sub_if_data *sdata;
1515
1516 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1517
1518 ieee80211_cleanup_sdata_stas(sdata);
1519}
1520
3e122be0 1521int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1522 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1523 struct vif_params *params)
f0706e82 1524{
f142c6b9 1525 struct net_device *ndev = NULL;
f0706e82 1526 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1527 int ret, i;
ded81f6b 1528 int txqs = 1;
f0706e82
JB		 1529
1530 ASSERT_RTNL();
75636525 1531
f142c6b9
JB		 1532 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1533 struct wireless_dev *wdev;
1534
1535 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1536 GFP_KERNEL);
1537 if (!sdata)
1538 return -ENOMEM;
1539 wdev = &sdata->wdev;
1540
1541 sdata->dev = NULL;
1542 strlcpy(sdata->name, name, IFNAMSIZ);
1543 ieee80211_assign_perm_addr(local, wdev->address, type);
1544 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1545 } else {
1546 if (local->hw.queues >= IEEE80211_NUM_ACS)
1547 txqs = IEEE80211_NUM_ACS;
1548
1549 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1550 local->hw.vif_data_size,
1551 name, ieee80211_if_setup, txqs, 1);
1552 if (!ndev)
1553 return -ENOMEM;
1554 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1555
1556 ndev->needed_headroom = local->tx_headroom +
1557 4*6 /* four MAC addresses */
1558 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1559 + 6 /* mesh */
1560 + 8 /* rfc1042/bridge tunnel */
1561 - ETH_HLEN /* ethernet hard_header_len */
1562 + IEEE80211_ENCRYPT_HEADROOM;
1563 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1564
1565 ret = dev_alloc_name(ndev, ndev->name);
1566 if (ret < 0) {
1567 free_netdev(ndev);
1568 return ret;
1569 }
1570
1571 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1572 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1573 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1574
1575 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1576 sdata = netdev_priv(ndev);
1577 ndev->ieee80211_ptr = &sdata->wdev;
1578 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1579 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1580
1581 sdata->dev = ndev;
1582 }
75636525
JB		 1583
1584 /* initialise type-independent data */
f0706e82 1585 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1586 sdata->local = local;
75636525
JB		 1587
1588 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1589 skb_queue_head_init(&sdata->fragments[i].skb_list);
1590
1591 INIT_LIST_HEAD(&sdata->key_list);
1592
97f97b1f
JB		 1593 spin_lock_init(&sdata->cleanup_stations_lock);
1594 INIT_LIST_HEAD(&sdata->cleanup_stations);
1595 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1596 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1597 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1598 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1599 ieee80211_delayed_tailroom_dec);
97f97b1f 1600
37eb0b16
JM		 1601 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1602 struct ieee80211_supported_band *sband;
1603 sband = local->hw.wiphy->bands[i];
1604 sdata->rc_rateidx_mask[i] =
1605 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1606 if (sband)
1607 memcpy(sdata->rc_rateidx_mcs_mask[i],
1608 sband->ht_cap.mcs.rx_mask,
1609 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1610 else
1611 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1612 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1613 }
75636525 1614
3a25a8c8
JB		 1615 ieee80211_set_default_queues(sdata);
1616
1ea6f9c0
JB		 1617 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1618 sdata->user_power_level = local->user_power_level;
1619
75636525
JB		 1620 /* setup type-dependent data */
1621 ieee80211_setup_sdata(sdata, type);
f0706e82 1622
f142c6b9
JB		 1623 if (ndev) {
1624 if (params) {
1625 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1626 if (type == NL80211_IFTYPE_STATION)
1627 sdata->u.mgd.use_4addr = params->use_4addr;
1628 }
9bc383de 1629
f142c6b9 1630 ndev->features |= local->hw.netdev_features;
72d78728 1631
f142c6b9
JB		 1632 ret = register_netdevice(ndev);
1633 if (ret) {
1634 free_netdev(ndev);
1635 return ret;
1636 }
1637 }
f0706e82 1638
c771c9d8 1639 mutex_lock(&local->iflist_mtx);
79010420 1640 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1641 mutex_unlock(&local->iflist_mtx);
79010420 1642
84efbb84
JB		 1643 if (new_wdev)
1644 *new_wdev = &sdata->wdev;
f0706e82 1645
f0706e82 1646 return 0;
f0706e82
JB		 1647}
1648
f698d856 1649void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1650{
f0706e82 1651 ASSERT_RTNL();
11a843b7 1652
c771c9d8 1653 mutex_lock(&sdata->local->iflist_mtx);
75636525 1654 list_del_rcu(&sdata->list);
c771c9d8
JB		 1655 mutex_unlock(&sdata->local->iflist_mtx);
1656
75636525 1657 synchronize_rcu();
f142c6b9
JB		 1658
1659 if (sdata->dev) {
1660 unregister_netdevice(sdata->dev);
1661 } else {
1662 cfg80211_unregister_wdev(&sdata->wdev);
1663 kfree(sdata);
1664 }
1665}
1666
1667void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1668{
1669 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1670 return;
1671 ieee80211_do_stop(sdata, true);
1672 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1673}
1674
75636525
JB		 1675/*
1676 * Remove all interfaces, may only be called at hardware unregistration
1677 * time because it doesn't do RCU-safe list removals.
1678 */
1679void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1680{
75636525 1681 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1682 LIST_HEAD(unreg_list);
f142c6b9 1683 LIST_HEAD(wdev_list);
f0706e82
JB		 1684
1685 ASSERT_RTNL();
1686
efe117ab 1687 mutex_lock(&local->iflist_mtx);
75636525
JB		 1688 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1689 list_del(&sdata->list);
c771c9d8 1690
f142c6b9
JB		 1691 if (sdata->dev)
1692 unregister_netdevice_queue(sdata->dev, &unreg_list);
1693 else
1694 list_add(&sdata->list, &wdev_list);
f0706e82 1695 }
efe117ab
ED		 1696 mutex_unlock(&local->iflist_mtx);
1697 unregister_netdevice_many(&unreg_list);
5f04d506 1698 list_del(&unreg_list);
f142c6b9
JB		 1699
1700 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1701 list_del(&sdata->list);
1702 cfg80211_unregister_wdev(&sdata->wdev);
1703 kfree(sdata);
1704 }
f0706e82 1705}
5cff20e6 1706
47846c9b
JB		 1707static int netdev_notify(struct notifier_block *nb,
1708 unsigned long state,
1709 void *ndev)
1710{
1711 struct net_device *dev = ndev;
1712 struct ieee80211_sub_if_data *sdata;
1713
1714 if (state != NETDEV_CHANGENAME)
1715 return 0;
1716
1717 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1718 return 0;
1719
1720 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1721 return 0;
1722
1723 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1724
2f5265e6 1725 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1726
1727 ieee80211_debugfs_rename_netdev(sdata);
1728 return 0;
1729}
1730
1731static struct notifier_block mac80211_netdev_notifier = {
1732 .notifier_call = netdev_notify,
1733};
1734
1735int ieee80211_iface_init(void)
1736{
1737 return register_netdevice_notifier(&mac80211_netdev_notifier);
1738}
1739
1740void ieee80211_iface_exit(void)
1741{
1742 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1743}
Linux 6.x block layer and io_uring tree(s)