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s390/uaccess: fix page table walk
[deliverable/linux.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
0d143fe1
JB		 2 * Interface handling (except master interface)
3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
f0706e82
JB		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
18#include <net/mac80211.h>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
1be7fe8d 27#include "rate.h"
0d143fe1 28
c771c9d8
JB		 29/**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
1ea6f9c0
JB		 45bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
46{
47 struct ieee80211_chanctx_conf *chanctx_conf;
48 int power;
49
50 rcu_read_lock();
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
52 if (!chanctx_conf) {
53 rcu_read_unlock();
54 return false;
55 }
56
4bf88530 57 power = chanctx_conf->def.chan->max_power;
1ea6f9c0
JB		 58 rcu_read_unlock();
59
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
62
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
65
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
69 return true;
70 }
71
72 return false;
73}
74
75void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
76{
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
79}
c771c9d8 80
fd0f979a 81static u32 ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 82{
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
84 return 0;
85
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
88}
89
90static u32 ieee80211_idle_on(struct ieee80211_local *local)
91{
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
93 return 0;
94
95 drv_flush(local, false);
96
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
99}
100
fd0f979a 101void ieee80211_recalc_idle(struct ieee80211_local *local)
cc45ae54 102{
fd0f979a 103 bool working = false, scanning, active;
cc45ae54
JB		 104 unsigned int led_trig_start = 0, led_trig_stop = 0;
105 struct ieee80211_roc_work *roc;
fd0f979a 106 u32 change;
cc45ae54 107
cc45ae54
JB		 108 lockdep_assert_held(&local->mtx);
109
b759f4dd 110 active = !list_empty(&local->chanctx_list) || local->monitors;
cc45ae54
JB		 111
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
114 working = true;
fd0f979a 115 break;
cc45ae54
JB		 116 }
117 }
118
f1e3e051
JB		 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 121
cc45ae54
JB		 122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
fd0f979a 127 if (active)
cc45ae54
JB		 128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129 else
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
133
fd0f979a
JB		 134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
cc45ae54 136 else
fd0f979a
JB		 137 change = ieee80211_idle_on(local);
138 if (change)
139 ieee80211_hw_config(local, change);
cc45ae54
JB		 140}
141
0d143fe1
JB		 142static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
143{
09b1426e 144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 145 return -EINVAL;
0d143fe1 146
0d143fe1
JB		 147 dev->mtu = new_mtu;
148 return 0;
149}
150
478622e8
HS		 151static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
152{
153 struct ieee80211_sub_if_data *sdata;
154 u64 new, mask, tmp;
155 u8 *m;
156 int ret = 0;
157
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
159 return 0;
160
161 m = addr;
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
165
166 m = local->hw.wiphy->addr_mask;
167 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
175 continue;
176
177 m = sdata->vif.addr;
178 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
182 if ((new & ~mask) != (tmp & ~mask)) {
183 ret = -EINVAL;
184 break;
185 }
186 }
187 mutex_unlock(&local->iflist_mtx);
188
189 return ret;
190}
191
47846c9b
JB		 192static int ieee80211_change_mac(struct net_device *dev, void *addr)
193{
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 195 struct sockaddr *sa = addr;
47846c9b
JB		 196 int ret;
197
9607e6b6 198 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 199 return -EBUSY;
200
478622e8
HS		 201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
202 if (ret)
203 return ret;
204
fc5f7577 205 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 206
207 if (ret == 0)
fc5f7577 208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 209
210 return ret;
211}
212
0d143fe1
JB		 213static inline int identical_mac_addr_allowed(int type1, int type2)
214{
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
227}
228
87490f6d
JB		 229static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
0d143fe1 231{
b4a4bf5d 232 struct ieee80211_local *local = sdata->local;
87490f6d 233 struct ieee80211_sub_if_data *nsdata;
0d143fe1 234
87490f6d 235 ASSERT_RTNL();
0d143fe1
JB		 236
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 240 /*
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
244 *
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
249 */
87490f6d 250 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
252 return -EBUSY;
253
254 /*
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
257 */
371a255e
JB		 258 if (!ether_addr_equal(sdata->vif.addr,
259 nsdata->vif.addr))
0d143fe1
JB		 260 continue;
261
262 /*
263 * check whether it may have the same address
264 */
87490f6d 265 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 266 nsdata->vif.type))
267 return -ENOTUNIQ;
268
269 /*
270 * can only add VLANs to enabled APs
271 */
87490f6d 272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
275 }
276 }
277
87490f6d
JB		 278 return 0;
279}
280
3a25a8c8
JB		 281static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
282{
283 int n_queues = sdata->local->hw.queues;
284 int i;
285
0ef24e52
IP		 286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
290 return -EINVAL;
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
292 n_queues))
293 return -EINVAL;
294 }
3a25a8c8
JB		 295 }
296
8ffb5c00
BC		 297 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
298 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 299 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 300 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
301 return 0;
302 }
303
304 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
305 return -EINVAL;
306
307 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
308 return -EINVAL;
309
310 return 0;
311}
312
85416a4f
CL		 313void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
314 const int offset)
315{
316 struct ieee80211_local *local = sdata->local;
317 u32 flags = sdata->u.mntr_flags;
318
319#define ADJUST(_f, _s) do { \
320 if (flags & MONITOR_FLAG_##_f) \
321 local->fif_##_s += offset; \
322 } while (0)
323
324 ADJUST(FCSFAIL, fcsfail);
325 ADJUST(PLCPFAIL, plcpfail);
326 ADJUST(CONTROL, control);
327 ADJUST(CONTROL, pspoll);
328 ADJUST(OTHER_BSS, other_bss);
329
330#undef ADJUST
331}
332
3a25a8c8
JB		 333static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
334{
335 struct ieee80211_local *local = sdata->local;
336 int i;
337
338 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
339 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
340 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 341 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 342 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 343 else
344 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 345 }
346 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347}
348
075e0847 349static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 350{
351 struct ieee80211_sub_if_data *sdata;
685fb72b 352 int ret = 0;
4b6f1dd6
JB		 353
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
355 return 0;
356
685fb72b
JB		 357 mutex_lock(&local->iflist_mtx);
358
4b6f1dd6 359 if (local->monitor_sdata)
685fb72b 360 goto out_unlock;
4b6f1dd6
JB		 361
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
685fb72b
JB		 363 if (!sdata) {
364 ret = -ENOMEM;
365 goto out_unlock;
366 }
4b6f1dd6
JB		 367
368 /* set up data */
369 sdata->local = local;
370 sdata->vif.type = NL80211_IFTYPE_MONITOR;
371 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
372 wiphy_name(local->hw.wiphy));
373
3a25a8c8
JB		 374 ieee80211_set_default_queues(sdata);
375
4b6f1dd6
JB		 376 ret = drv_add_interface(local, sdata);
377 if (WARN_ON(ret)) {
378 /* ok .. stupid driver, it asked for this! */
379 kfree(sdata);
685fb72b 380 goto out_unlock;
4b6f1dd6
JB		 381 }
382
3a25a8c8
JB		 383 ret = ieee80211_check_queues(sdata);
384 if (ret) {
385 kfree(sdata);
685fb72b 386 goto out_unlock;
3a25a8c8
JB		 387 }
388
4bf88530 389 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 390 IEEE80211_CHANCTX_EXCLUSIVE);
391 if (ret) {
392 drv_remove_interface(local, sdata);
393 kfree(sdata);
394 goto out_unlock;
395 }
396
4b6f1dd6 397 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b
JB		 398 out_unlock:
399 mutex_unlock(&local->iflist_mtx);
400 return ret;
4b6f1dd6
JB		 401}
402
075e0847 403static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 404{
405 struct ieee80211_sub_if_data *sdata;
406
407 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
408 return;
409
685fb72b 410 mutex_lock(&local->iflist_mtx);
4b6f1dd6 411
685fb72b
JB		 412 sdata = rcu_dereference_protected(local->monitor_sdata,
413 lockdep_is_held(&local->iflist_mtx));
4b6f1dd6 414 if (!sdata)
685fb72b 415 goto out_unlock;
4b6f1dd6
JB		 416
417 rcu_assign_pointer(local->monitor_sdata, NULL);
418 synchronize_net();
419
55de908a
JB		 420 ieee80211_vif_release_channel(sdata);
421
4b6f1dd6
JB		 422 drv_remove_interface(local, sdata);
423
424 kfree(sdata);
685fb72b
JB		 425 out_unlock:
426 mutex_unlock(&local->iflist_mtx);
4b6f1dd6
JB		 427}
428
34d4bc4d
JB		 429/*
430 * NOTE: Be very careful when changing this function, it must NOT return
431 * an error on interface type changes that have been pre-checked, so most
432 * checks should be in ieee80211_check_concurrent_iface.
433 */
f142c6b9 434int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 435{
f142c6b9
JB		 436 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
437 struct net_device *dev = wdev->netdev;
87490f6d
JB		 438 struct ieee80211_local *local = sdata->local;
439 struct sta_info *sta;
440 u32 changed = 0;
441 int res;
442 u32 hw_reconf_flags = 0;
443
0d143fe1
JB		 444 switch (sdata->vif.type) {
445 case NL80211_IFTYPE_WDS:
446 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
447 return -ENOLINK;
448 break;
665c93a9
JB		 449 case NL80211_IFTYPE_AP_VLAN: {
450 struct ieee80211_sub_if_data *master;
451
0d143fe1
JB		 452 if (!sdata->bss)
453 return -ENOLINK;
665c93a9 454
0d143fe1 455 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 456
457 master = container_of(sdata->bss,
458 struct ieee80211_sub_if_data, u.ap);
459 sdata->control_port_protocol =
460 master->control_port_protocol;
461 sdata->control_port_no_encrypt =
462 master->control_port_no_encrypt;
0d143fe1 463 break;
665c93a9 464 }
0d143fe1
JB		 465 case NL80211_IFTYPE_AP:
466 sdata->bss = &sdata->u.ap;
467 break;
468 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 469 case NL80211_IFTYPE_STATION:
470 case NL80211_IFTYPE_MONITOR:
471 case NL80211_IFTYPE_ADHOC:
f142c6b9 472 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 473 /* no special treatment */
474 break;
475 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 476 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 477 case NL80211_IFTYPE_P2P_CLIENT:
478 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 479 /* cannot happen */
480 WARN_ON(1);
481 break;
482 }
483
484 if (local->open_count == 0) {
24487981 485 res = drv_start(local);
0d143fe1
JB		 486 if (res)
487 goto err_del_bss;
4e6cbfd0
JL		 488 if (local->ops->napi_poll)
489 napi_enable(&local->napi);
e8975581
JB		 490 /* we're brought up, everything changes */
491 hw_reconf_flags = ~0;
1f87f7d3 492 ieee80211_led_radio(local, true);
67408c8c
JB		 493 ieee80211_mod_tpt_led_trig(local,
494 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 495 }
496
497 /*
bf533e0b
JB		 498 * Copy the hopefully now-present MAC address to
499 * this interface, if it has the special null one.
0d143fe1 500 */
f142c6b9 501 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 502 memcpy(dev->dev_addr,
503 local->hw.wiphy->perm_addr,
504 ETH_ALEN);
505 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
506
507 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 508 res = -EADDRNOTAVAIL;
509 goto err_stop;
0adc23f5 510 }
0d143fe1
JB		 511 }
512
0d143fe1
JB		 513 switch (sdata->vif.type) {
514 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 515 /* no need to tell driver, but set carrier and chanctx */
516 if (rtnl_dereference(sdata->bss->beacon)) {
517 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 518 netif_carrier_on(dev);
4d76d21b 519 } else {
3edaf3e6 520 netif_carrier_off(dev);
4d76d21b 521 }
0d143fe1
JB		 522 break;
523 case NL80211_IFTYPE_MONITOR:
524 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
525 local->cooked_mntrs++;
526 break;
527 }
528
075e0847
JB		 529 if (local->monitors == 0 && local->open_count == 0) {
530 res = ieee80211_add_virtual_monitor(local);
531 if (res)
532 goto err_stop;
533 }
534
0d143fe1
JB		 535 /* must be before the call to ieee80211_configure_filter */
536 local->monitors++;
e8975581 537 if (local->monitors == 1) {
0869aea0
JB		 538 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
539 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 540 }
0d143fe1 541
85416a4f 542 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 543 ieee80211_configure_filter(local);
801d929c
FF		 544 mutex_lock(&local->mtx);
545 ieee80211_recalc_idle(local);
546 mutex_unlock(&local->mtx);
53e9b1de
DG		 547
548 netif_carrier_on(dev);
0d143fe1 549 break;
0d143fe1 550 default:
34d4bc4d 551 if (coming_up) {
075e0847
JB		 552 ieee80211_del_virtual_monitor(local);
553
7b7eab6f 554 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 555 if (res)
556 goto err_stop;
3a25a8c8
JB		 557 res = ieee80211_check_queues(sdata);
558 if (res)
559 goto err_del_interface;
34d4bc4d 560 }
0d143fe1 561
b207cdb0
AB		 562 drv_add_interface_debugfs(local, sdata);
563
29cbe68c 564 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 565 local->fif_pspoll++;
7be5086d 566 local->fif_probe_req++;
e3b90ca2 567
e3b90ca2 568 ieee80211_configure_filter(local);
7be5086d
JB		 569 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
570 local->fif_probe_req++;
a3c9aa51 571 }
e3b90ca2 572
f142c6b9
JB		 573 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
574 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 575 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 576
c405c629
JB		 577 switch (sdata->vif.type) {
578 case NL80211_IFTYPE_STATION:
579 case NL80211_IFTYPE_ADHOC:
580 case NL80211_IFTYPE_AP:
581 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 582 netif_carrier_off(dev);
c405c629 583 break;
1411af15 584 case NL80211_IFTYPE_WDS:
f142c6b9 585 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 586 break;
c405c629 587 default:
0d143fe1 588 netif_carrier_on(dev);
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
f142c6b9
JB		 645 if (dev)
646 netif_tx_start_all_queues(dev);
0d143fe1
JB		 647
648 return 0;
649 err_del_interface:
7b7eab6f 650 drv_remove_interface(local, sdata);
0d143fe1 651 err_stop:
24487981
JB		 652 if (!local->open_count)
653 drv_stop(local);
0d143fe1
JB		 654 err_del_bss:
655 sdata->bss = NULL;
656 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
657 list_del(&sdata->u.vlan.list);
4d6c36fa 658 /* might already be clear but that doesn't matter */
2d2080c3 659 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 660 return res;
661}
662
34d4bc4d 663static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 664{
665 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 666 int err;
667
668 /* fail early if user set an invalid address */
2fcf2824 669 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 670 return -EADDRNOTAVAIL;
671
672 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
673 if (err)
674 return err;
675
f142c6b9 676 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 677}
678
679static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
680 bool going_down)
681{
0d143fe1 682 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 683 unsigned long flags;
684 struct sk_buff *skb, *tmp;
e8975581 685 u32 hw_reconf_flags = 0;
09f4114e 686 int i, flushed;
397a7a24 687 struct ps_data *ps;
0d143fe1 688
c29acf20
RM		 689 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
690
e2fd5dbc 691 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 692 ieee80211_scan_cancel(local);
693
0d143fe1
JB		 694 /*
695 * Stop TX on this interface first.
696 */
f142c6b9
JB		 697 if (sdata->dev)
698 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 699
2eb278e0 700 ieee80211_roc_purge(sdata);
af6b6374 701
572078be
JB		 702 if (sdata->vif.type == NL80211_IFTYPE_STATION)
703 ieee80211_mgd_stop(sdata);
704
0d143fe1
JB		 705 /*
706 * Remove all stations associated with this interface.
707 *
708 * This must be done before calling ops->remove_interface()
709 * because otherwise we can later invoke ops->sta_notify()
710 * whenever the STAs are removed, and that invalidates driver
711 * assumptions about always getting a vif pointer that is valid
712 * (because if we remove a STA after ops->remove_interface()
713 * the driver will have removed the vif info already!)
714 *
09f4114e
JB		 715 * This is relevant only in WDS mode, in all other modes we've
716 * already removed all stations when disconnecting or similar,
717 * so warn otherwise.
051007d9
JB		 718 *
719 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 720 */
051007d9 721 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 722 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
723 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1
JB		 724
725 /*
726 * Don't count this interface for promisc/allmulti while it
727 * is down. dev_mc_unsync() will invoke set_multicast_list
728 * on the master interface which will sync these down to the
729 * hardware as filter flags.
730 */
731 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
732 atomic_dec(&local->iff_allmultis);
733
734 if (sdata->flags & IEEE80211_SDATA_PROMISC)
735 atomic_dec(&local->iff_promiscs);
736
7be5086d 737 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 738 local->fif_pspoll--;
7be5086d
JB		 739 local->fif_probe_req--;
740 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
741 local->fif_probe_req--;
742 }
e3b90ca2 743
f142c6b9
JB		 744 if (sdata->dev) {
745 netif_addr_lock_bh(sdata->dev);
746 spin_lock_bh(&local->filter_lock);
747 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
748 sdata->dev->addr_len);
749 spin_unlock_bh(&local->filter_lock);
750 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 751
f142c6b9
JB		 752 ieee80211_configure_filter(local);
753 }
3ac64bee 754
7cbf0ba5
VN		 755 del_timer_sync(&local->dynamic_ps_timer);
756 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 757
04ecd257
JB		 758 cancel_work_sync(&sdata->recalc_smps);
759
164eb02d
SW		 760 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
761
762 if (sdata->wdev.cac_started) {
763 mutex_lock(&local->iflist_mtx);
764 ieee80211_vif_release_channel(sdata);
765 mutex_unlock(&local->iflist_mtx);
766 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
767 GFP_KERNEL);
768 }
769
0d143fe1
JB		 770 /* APs need special treatment */
771 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 772 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 773
774 /* down all dependent devices, that is VLANs */
57c9fff3 775 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 776 u.vlan.list)
777 dev_close(vlan->dev);
778 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 779 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
780 /* remove all packets in parent bc_buf pointing to this dev */
781 ps = &sdata->bss->ps;
782
783 spin_lock_irqsave(&ps->bc_buf.lock, flags);
784 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
785 if (skb->dev == sdata->dev) {
786 __skb_unlink(skb, &ps->bc_buf);
787 local->total_ps_buffered--;
788 ieee80211_free_txskb(&local->hw, skb);
789 }
790 }
791 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 792 }
793
34d4bc4d
JB		 794 if (going_down)
795 local->open_count--;
0d143fe1
JB		 796
797 switch (sdata->vif.type) {
798 case NL80211_IFTYPE_AP_VLAN:
799 list_del(&sdata->u.vlan.list);
4d76d21b 800 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 801 /* no need to tell driver */
802 break;
803 case NL80211_IFTYPE_MONITOR:
804 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
805 local->cooked_mntrs--;
806 break;
807 }
808
809 local->monitors--;
e8975581 810 if (local->monitors == 0) {
0869aea0
JB		 811 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
812 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
075e0847 813 ieee80211_del_virtual_monitor(local);
e8975581 814 }
0d143fe1 815
85416a4f 816 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 817 ieee80211_configure_filter(local);
801d929c
FF		 818 mutex_lock(&local->mtx);
819 ieee80211_recalc_idle(local);
820 mutex_unlock(&local->mtx);
0d143fe1 821 break;
f142c6b9
JB		 822 case NL80211_IFTYPE_P2P_DEVICE:
823 /* relies on synchronize_rcu() below */
824 rcu_assign_pointer(local->p2p_sdata, NULL);
825 /* fall through */
0d143fe1 826 default:
0b7dff4f 827 cancel_work_sync(&sdata->work);
35f20c14
JB		 828 /*
829 * When we get here, the interface is marked down.
75de9113
JB		 830 *
831 * sta_info_flush_cleanup() requires rcu_barrier()
832 * first to wait for the station call_rcu() calls
833 * to complete, here we need at least sychronize_rcu()
834 * it to wait for the RX path in case it is using the
835 * interface and enqueuing frames at this very time on
836 * another CPU.
35f20c14 837 */
75de9113 838 rcu_barrier();
051007d9
JB		 839 sta_info_flush_cleanup(sdata);
840
35f20c14
JB		 841 skb_queue_purge(&sdata->skb_queue);
842
b9dcf712
JB		 843 /*
844 * Free all remaining keys, there shouldn't be any,
845 * except maybe group keys in AP more or WDS?
846 */
ad0e2b5a 847 ieee80211_free_keys(sdata);
b9dcf712 848
b207cdb0
AB		 849 drv_remove_interface_debugfs(local, sdata);
850
34d4bc4d 851 if (going_down)
7b7eab6f 852 drv_remove_interface(local, sdata);
0d143fe1
JB		 853 }
854
855 sdata->bss = NULL;
856
5cff20e6
JB		 857 ieee80211_recalc_ps(local, -1);
858
0d143fe1 859 if (local->open_count == 0) {
4e6cbfd0
JL		 860 if (local->ops->napi_poll)
861 napi_disable(&local->napi);
ea77f12f 862 ieee80211_clear_tx_pending(local);
84f6a01c 863 ieee80211_stop_device(local);
0d143fe1 864
e8975581
JB		 865 /* no reconfiguring after stop! */
866 hw_reconf_flags = 0;
0d143fe1
JB		 867 }
868
e8975581 869 /* do after stop to avoid reconfiguring when we stop anyway */
55de908a 870 if (hw_reconf_flags)
e8975581
JB		 871 ieee80211_hw_config(local, hw_reconf_flags);
872
5061b0c2
JB		 873 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
874 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
875 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
876 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
877 if (info->control.vif == &sdata->vif) {
878 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 879 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 880 }
881 }
882 }
883 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847
JB		 884
885 if (local->monitors == local->open_count && local->monitors > 0)
886 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 887}
888
889static int ieee80211_stop(struct net_device *dev)
890{
891 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
892
893 ieee80211_do_stop(sdata, true);
5061b0c2 894
0d143fe1
JB		 895 return 0;
896}
897
898static void ieee80211_set_multicast_list(struct net_device *dev)
899{
0d143fe1 900 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 901 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 902 int allmulti, promisc, sdata_allmulti, sdata_promisc;
903
904 allmulti = !!(dev->flags & IFF_ALLMULTI);
905 promisc = !!(dev->flags & IFF_PROMISC);
906 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
907 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
908
909 if (allmulti != sdata_allmulti) {
910 if (dev->flags & IFF_ALLMULTI)
911 atomic_inc(&local->iff_allmultis);
912 else
913 atomic_dec(&local->iff_allmultis);
914 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
915 }
916
917 if (promisc != sdata_promisc) {
918 if (dev->flags & IFF_PROMISC)
919 atomic_inc(&local->iff_promiscs);
920 else
921 atomic_dec(&local->iff_promiscs);
922 sdata->flags ^= IEEE80211_SDATA_PROMISC;
923 }
3b8d81e0 924 spin_lock_bh(&local->filter_lock);
22bedad3 925 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 926 spin_unlock_bh(&local->filter_lock);
3ac64bee 927 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 928}
929
75636525
JB		 930/*
931 * Called when the netdev is removed or, by the code below, before
932 * the interface type changes.
933 */
f142c6b9 934static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 935{
75636525 936 int flushed;
f0706e82
JB		 937 int i;
938
75636525
JB		 939 /* free extra data */
940 ieee80211_free_keys(sdata);
941
aee14ceb
JM		 942 ieee80211_debugfs_remove_netdev(sdata);
943
f0706e82 944 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 945 __skb_queue_purge(&sdata->fragments[i].skb_list);
946 sdata->fragment_next = 0;
11a843b7 947
b9dcf712
JB		 948 if (ieee80211_vif_is_mesh(&sdata->vif))
949 mesh_rmc_free(sdata);
75636525 950
b998e8bb 951 flushed = sta_info_flush(sdata);
75636525 952 WARN_ON(flushed);
f0706e82
JB		 953}
954
f142c6b9
JB		 955static void ieee80211_uninit(struct net_device *dev)
956{
957 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
958}
959
cf0277e7
JB		 960static u16 ieee80211_netdev_select_queue(struct net_device *dev,
961 struct sk_buff *skb)
962{
963 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
964}
965
587e729e
JB		 966static const struct net_device_ops ieee80211_dataif_ops = {
967 .ndo_open = ieee80211_open,
968 .ndo_stop = ieee80211_stop,
f142c6b9 969 .ndo_uninit = ieee80211_uninit,
587e729e 970 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 971 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 972 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 973 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 974 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 975};
976
cf0277e7
JB		 977static u16 ieee80211_monitor_select_queue(struct net_device *dev,
978 struct sk_buff *skb)
979{
980 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
981 struct ieee80211_local *local = sdata->local;
982 struct ieee80211_hdr *hdr;
983 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
984
32c5057b 985 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 986 return 0;
987
988 if (skb->len < 4 ||
b49bb574 989 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 990 return 0; /* doesn't matter, frame will be dropped */
991
b49bb574 992 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 993
00e96dec 994 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 995}
996
587e729e
JB		 997static const struct net_device_ops ieee80211_monitorif_ops = {
998 .ndo_open = ieee80211_open,
999 .ndo_stop = ieee80211_stop,
f142c6b9 1000 .ndo_uninit = ieee80211_uninit,
587e729e 1001 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1002 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1003 .ndo_change_mtu = ieee80211_change_mtu,
1004 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1005 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1006};
1007
1008static void ieee80211_if_setup(struct net_device *dev)
1009{
1010 ether_setup(dev);
550fd08c 1011 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1012 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1013 dev->destructor = free_netdev;
1014}
1015
1fa57d01
JB		 1016static void ieee80211_iface_work(struct work_struct *work)
1017{
1018 struct ieee80211_sub_if_data *sdata =
1019 container_of(work, struct ieee80211_sub_if_data, work);
1020 struct ieee80211_local *local = sdata->local;
1021 struct sk_buff *skb;
344eec67 1022 struct sta_info *sta;
c1475ca9 1023 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1024
1025 if (!ieee80211_sdata_running(sdata))
1026 return;
1027
1028 if (local->scanning)
1029 return;
1030
1031 /*
1032 * ieee80211_queue_work() should have picked up most cases,
1033 * here we'll pick the rest.
1034 */
1035 if (WARN(local->suspended,
1036 "interface work scheduled while going to suspend\n"))
1037 return;
1038
1039 /* first process frames */
1040 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1041 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1042
c1475ca9
JB		 1043 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1044 ra_tid = (void *)&skb->cb;
1045 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1046 ra_tid->tid);
1047 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1048 ra_tid = (void *)&skb->cb;
1049 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1050 ra_tid->tid);
1051 } else if (ieee80211_is_action(mgmt->frame_control) &&
1052 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1053 int len = skb->len;
bed7ee6e 1054
a93e3644 1055 mutex_lock(&local->sta_mtx);
875ae5f6 1056 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1057 if (sta) {
1058 switch (mgmt->u.action.u.addba_req.action_code) {
1059 case WLAN_ACTION_ADDBA_REQ:
1060 ieee80211_process_addba_request(
1061 local, sta, mgmt, len);
1062 break;
1063 case WLAN_ACTION_ADDBA_RESP:
1064 ieee80211_process_addba_resp(local, sta,
1065 mgmt, len);
1066 break;
1067 case WLAN_ACTION_DELBA:
1068 ieee80211_process_delba(sdata, sta,
1069 mgmt, len);
1070 break;
1071 default:
1072 WARN_ON(1);
1073 break;
1074 }
1075 }
a93e3644 1076 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1077 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1078 struct ieee80211_hdr *hdr = (void *)mgmt;
1079 /*
1080 * So the frame isn't mgmt, but frame_control
1081 * is at the right place anyway, of course, so
1082 * the if statement is correct.
1083 *
1084 * Warn if we have other data frame types here,
1085 * they must not get here.
1086 */
1087 WARN_ON(hdr->frame_control &
1088 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1089 WARN_ON(!(hdr->seq_ctrl &
1090 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1091 /*
1092 * This was a fragment of a frame, received while
1093 * a block-ack session was active. That cannot be
1094 * right, so terminate the session.
1095 */
a93e3644 1096 mutex_lock(&local->sta_mtx);
875ae5f6 1097 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1098 if (sta) {
1099 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1100 IEEE80211_QOS_CTL_TID_MASK;
1101
1102 __ieee80211_stop_rx_ba_session(
1103 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1104 WLAN_REASON_QSTA_REQUIRE_SETUP,
1105 true);
344eec67 1106 }
a93e3644 1107 mutex_unlock(&local->sta_mtx);
bed7ee6e 1108 } else switch (sdata->vif.type) {
1fa57d01
JB		 1109 case NL80211_IFTYPE_STATION:
1110 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1111 break;
1112 case NL80211_IFTYPE_ADHOC:
1113 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1114 break;
1115 case NL80211_IFTYPE_MESH_POINT:
1116 if (!ieee80211_vif_is_mesh(&sdata->vif))
1117 break;
1118 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1119 break;
1120 default:
1121 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1122 break;
1123 }
36b3a628
JB		 1124
1125 kfree_skb(skb);
1fa57d01
JB		 1126 }
1127
1128 /* then other type-dependent work */
1129 switch (sdata->vif.type) {
1130 case NL80211_IFTYPE_STATION:
1131 ieee80211_sta_work(sdata);
1132 break;
1133 case NL80211_IFTYPE_ADHOC:
1134 ieee80211_ibss_work(sdata);
1135 break;
1136 case NL80211_IFTYPE_MESH_POINT:
1137 if (!ieee80211_vif_is_mesh(&sdata->vif))
1138 break;
1139 ieee80211_mesh_work(sdata);
1140 break;
1141 default:
1142 break;
1143 }
1144}
1145
04ecd257
JB		 1146static void ieee80211_recalc_smps_work(struct work_struct *work)
1147{
1148 struct ieee80211_sub_if_data *sdata =
1149 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1150
1151 ieee80211_recalc_smps(sdata);
1152}
1fa57d01 1153
75636525
JB		 1154/*
1155 * Helper function to initialise an interface to a specific type.
1156 */
1157static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1158 enum nl80211_iftype type)
f0706e82 1159{
75636525
JB		 1160 /* clear type-dependent union */
1161 memset(&sdata->u, 0, sizeof(sdata->u));
1162
1163 /* and set some type-dependent values */
1164 sdata->vif.type = type;
2ca27bcf 1165 sdata->vif.p2p = false;
60719ffd 1166 sdata->wdev.iftype = type;
75636525 1167
a621fa4d
JB		 1168 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1169 sdata->control_port_no_encrypt = false;
1170
b53be792
SW		 1171 sdata->noack_map = 0;
1172
f142c6b9
JB		 1173 /* only monitor/p2p-device differ */
1174 if (sdata->dev) {
1175 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1176 sdata->dev->type = ARPHRD_ETHER;
1177 }
75636525 1178
35f20c14 1179 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1180 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1181 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1182
75636525 1183 switch (type) {
2ca27bcf
JB		 1184 case NL80211_IFTYPE_P2P_GO:
1185 type = NL80211_IFTYPE_AP;
1186 sdata->vif.type = type;
1187 sdata->vif.p2p = true;
1188 /* fall through */
05c914fe 1189 case NL80211_IFTYPE_AP:
d012a605 1190 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1191 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1192 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1193 break;
2ca27bcf
JB		 1194 case NL80211_IFTYPE_P2P_CLIENT:
1195 type = NL80211_IFTYPE_STATION;
1196 sdata->vif.type = type;
1197 sdata->vif.p2p = true;
1198 /* fall through */
05c914fe 1199 case NL80211_IFTYPE_STATION:
ad2d223a 1200 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1201 ieee80211_sta_setup_sdata(sdata);
472dbc45 1202 break;
46900298 1203 case NL80211_IFTYPE_ADHOC:
ad2d223a 1204 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1205 ieee80211_ibss_setup_sdata(sdata);
1206 break;
05c914fe 1207 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1208 if (ieee80211_vif_is_mesh(&sdata->vif))
1209 ieee80211_mesh_init_sdata(sdata);
1210 break;
05c914fe 1211 case NL80211_IFTYPE_MONITOR:
75636525 1212 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1213 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1214 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1215 MONITOR_FLAG_OTHER_BSS;
1216 break;
05c914fe 1217 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1218 sdata->vif.bss_conf.bssid = NULL;
1219 break;
05c914fe 1220 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1221 break;
98104fde 1222 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1223 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1224 break;
05c914fe 1225 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1226 case NUM_NL80211_IFTYPES:
75636525
JB		 1227 BUG();
1228 break;
1229 }
1230
1231 ieee80211_debugfs_add_netdev(sdata);
1232}
1233
34d4bc4d
JB		 1234static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1235 enum nl80211_iftype type)
1236{
1237 struct ieee80211_local *local = sdata->local;
1238 int ret, err;
2ca27bcf
JB		 1239 enum nl80211_iftype internal_type = type;
1240 bool p2p = false;
34d4bc4d
JB		 1241
1242 ASSERT_RTNL();
1243
1244 if (!local->ops->change_interface)
1245 return -EBUSY;
1246
1247 switch (sdata->vif.type) {
1248 case NL80211_IFTYPE_AP:
1249 case NL80211_IFTYPE_STATION:
1250 case NL80211_IFTYPE_ADHOC:
1251 /*
1252 * Could maybe also all others here?
1253 * Just not sure how that interacts
1254 * with the RX/config path e.g. for
1255 * mesh.
1256 */
1257 break;
1258 default:
1259 return -EBUSY;
1260 }
1261
1262 switch (type) {
1263 case NL80211_IFTYPE_AP:
1264 case NL80211_IFTYPE_STATION:
1265 case NL80211_IFTYPE_ADHOC:
1266 /*
1267 * Could probably support everything
1268 * but WDS here (WDS do_open can fail
1269 * under memory pressure, which this
1270 * code isn't prepared to handle).
1271 */
1272 break;
2ca27bcf
JB		 1273 case NL80211_IFTYPE_P2P_CLIENT:
1274 p2p = true;
1275 internal_type = NL80211_IFTYPE_STATION;
1276 break;
1277 case NL80211_IFTYPE_P2P_GO:
1278 p2p = true;
1279 internal_type = NL80211_IFTYPE_AP;
1280 break;
34d4bc4d
JB		 1281 default:
1282 return -EBUSY;
1283 }
1284
2ca27bcf 1285 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1286 if (ret)
1287 return ret;
1288
1289 ieee80211_do_stop(sdata, false);
1290
f142c6b9 1291 ieee80211_teardown_sdata(sdata);
34d4bc4d 1292
2ca27bcf 1293 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1294 if (ret)
1295 type = sdata->vif.type;
1296
3a25a8c8
JB		 1297 /*
1298 * Ignore return value here, there's not much we can do since
1299 * the driver changed the interface type internally already.
1300 * The warnings will hopefully make driver authors fix it :-)
1301 */
1302 ieee80211_check_queues(sdata);
1303
34d4bc4d
JB		 1304 ieee80211_setup_sdata(sdata, type);
1305
f142c6b9 1306 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1307 WARN(err, "type change: do_open returned %d", err);
1308
1309 return ret;
1310}
1311
f3947e2d 1312int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1313 enum nl80211_iftype type)
75636525 1314{
34d4bc4d
JB		 1315 int ret;
1316
f3947e2d
JB		 1317 ASSERT_RTNL();
1318
2ca27bcf 1319 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1320 return 0;
1321
34d4bc4d
JB		 1322 if (ieee80211_sdata_running(sdata)) {
1323 ret = ieee80211_runtime_change_iftype(sdata, type);
1324 if (ret)
1325 return ret;
1326 } else {
1327 /* Purge and reset type-dependent state. */
f142c6b9 1328 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1329 ieee80211_setup_sdata(sdata, type);
1330 }
75636525
JB		 1331
1332 /* reset some values that shouldn't be kept across type changes */
75636525 1333 sdata->drop_unencrypted = 0;
9bc383de
JB		 1334 if (type == NL80211_IFTYPE_STATION)
1335 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1336
1337 return 0;
f0706e82
JB		 1338}
1339
fa9029f8 1340static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1341 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1342{
1343 struct ieee80211_sub_if_data *sdata;
1344 u64 mask, start, addr, val, inc;
1345 u8 *m;
1346 u8 tmp_addr[ETH_ALEN];
1347 int i;
1348
1349 /* default ... something at least */
f142c6b9 1350 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1351
1352 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1353 local->hw.wiphy->n_addresses <= 1)
1354 return;
1355
fa9029f8
JB		 1356 mutex_lock(&local->iflist_mtx);
1357
1358 switch (type) {
1359 case NL80211_IFTYPE_MONITOR:
1360 /* doesn't matter */
1361 break;
1362 case NL80211_IFTYPE_WDS:
1363 case NL80211_IFTYPE_AP_VLAN:
1364 /* match up with an AP interface */
1365 list_for_each_entry(sdata, &local->interfaces, list) {
1366 if (sdata->vif.type != NL80211_IFTYPE_AP)
1367 continue;
f142c6b9 1368 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1369 break;
1370 }
1371 /* keep default if no AP interface present */
1372 break;
6d71117a
JB		 1373 case NL80211_IFTYPE_P2P_CLIENT:
1374 case NL80211_IFTYPE_P2P_GO:
1375 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1376 list_for_each_entry(sdata, &local->interfaces, list) {
1377 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1378 continue;
1379 if (!ieee80211_sdata_running(sdata))
1380 continue;
1381 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1382 goto out_unlock;
1383 }
1384 }
1385 /* otherwise fall through */
fa9029f8
JB		 1386 default:
1387 /* assign a new address if possible -- try n_addresses first */
1388 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1389 bool used = false;
1390
1391 list_for_each_entry(sdata, &local->interfaces, list) {
1392 if (memcmp(local->hw.wiphy->addresses[i].addr,
1393 sdata->vif.addr, ETH_ALEN) == 0) {
1394 used = true;
1395 break;
1396 }
1397 }
1398
1399 if (!used) {
f142c6b9 1400 memcpy(perm_addr,
fa9029f8
JB		 1401 local->hw.wiphy->addresses[i].addr,
1402 ETH_ALEN);
1403 break;
1404 }
1405 }
1406
1407 /* try mask if available */
1408 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1409 break;
1410
1411 m = local->hw.wiphy->addr_mask;
1412 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1413 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1414 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1415
1416 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1417 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1418 pr_info("not contiguous\n");
fa9029f8
JB		 1419 break;
1420 }
1421
1422 m = local->hw.wiphy->perm_addr;
1423 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1424 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1425 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1426
1427 inc = 1ULL<<__ffs64(mask);
1428 val = (start & mask);
1429 addr = (start & ~mask) | (val & mask);
1430 do {
1431 bool used = false;
1432
1433 tmp_addr[5] = addr >> 0*8;
1434 tmp_addr[4] = addr >> 1*8;
1435 tmp_addr[3] = addr >> 2*8;
1436 tmp_addr[2] = addr >> 3*8;
1437 tmp_addr[1] = addr >> 4*8;
1438 tmp_addr[0] = addr >> 5*8;
1439
1440 val += inc;
1441
1442 list_for_each_entry(sdata, &local->interfaces, list) {
1443 if (memcmp(tmp_addr, sdata->vif.addr,
1444 ETH_ALEN) == 0) {
1445 used = true;
1446 break;
1447 }
1448 }
1449
1450 if (!used) {
f142c6b9 1451 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1452 break;
1453 }
1454 addr = (start & ~mask) | (val & mask);
1455 } while (addr != start);
1456
1457 break;
1458 }
1459
6d71117a 1460 out_unlock:
fa9029f8
JB		 1461 mutex_unlock(&local->iflist_mtx);
1462}
1463
97f97b1f
JB		 1464static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1465{
1466 struct ieee80211_sub_if_data *sdata;
1467
1468 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1469
1470 ieee80211_cleanup_sdata_stas(sdata);
1471}
1472
3e122be0 1473int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1474 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1475 struct vif_params *params)
f0706e82 1476{
f142c6b9 1477 struct net_device *ndev = NULL;
f0706e82 1478 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1479 int ret, i;
ded81f6b 1480 int txqs = 1;
f0706e82
JB		 1481
1482 ASSERT_RTNL();
75636525 1483
f142c6b9
JB		 1484 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1485 struct wireless_dev *wdev;
1486
1487 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1488 GFP_KERNEL);
1489 if (!sdata)
1490 return -ENOMEM;
1491 wdev = &sdata->wdev;
1492
1493 sdata->dev = NULL;
1494 strlcpy(sdata->name, name, IFNAMSIZ);
1495 ieee80211_assign_perm_addr(local, wdev->address, type);
1496 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1497 } else {
1498 if (local->hw.queues >= IEEE80211_NUM_ACS)
1499 txqs = IEEE80211_NUM_ACS;
1500
1501 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1502 local->hw.vif_data_size,
1503 name, ieee80211_if_setup, txqs, 1);
1504 if (!ndev)
1505 return -ENOMEM;
1506 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1507
1508 ndev->needed_headroom = local->tx_headroom +
1509 4*6 /* four MAC addresses */
1510 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1511 + 6 /* mesh */
1512 + 8 /* rfc1042/bridge tunnel */
1513 - ETH_HLEN /* ethernet hard_header_len */
1514 + IEEE80211_ENCRYPT_HEADROOM;
1515 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1516
1517 ret = dev_alloc_name(ndev, ndev->name);
1518 if (ret < 0) {
1519 free_netdev(ndev);
1520 return ret;
1521 }
1522
1523 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1524 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1525 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1526
1527 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1528 sdata = netdev_priv(ndev);
1529 ndev->ieee80211_ptr = &sdata->wdev;
1530 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1531 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1532
1533 sdata->dev = ndev;
1534 }
75636525
JB		 1535
1536 /* initialise type-independent data */
f0706e82 1537 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1538 sdata->local = local;
75636525
JB		 1539
1540 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1541 skb_queue_head_init(&sdata->fragments[i].skb_list);
1542
1543 INIT_LIST_HEAD(&sdata->key_list);
1544
97f97b1f
JB		 1545 spin_lock_init(&sdata->cleanup_stations_lock);
1546 INIT_LIST_HEAD(&sdata->cleanup_stations);
1547 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1548 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1549 ieee80211_dfs_cac_timer_work);
97f97b1f 1550
37eb0b16
JM		 1551 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1552 struct ieee80211_supported_band *sband;
1553 sband = local->hw.wiphy->bands[i];
1554 sdata->rc_rateidx_mask[i] =
1555 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1556 if (sband)
1557 memcpy(sdata->rc_rateidx_mcs_mask[i],
1558 sband->ht_cap.mcs.rx_mask,
1559 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1560 else
1561 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1562 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1563 }
75636525 1564
3a25a8c8
JB		 1565 ieee80211_set_default_queues(sdata);
1566
1ea6f9c0
JB		 1567 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1568 sdata->user_power_level = local->user_power_level;
1569
75636525
JB		 1570 /* setup type-dependent data */
1571 ieee80211_setup_sdata(sdata, type);
f0706e82 1572
f142c6b9
JB		 1573 if (ndev) {
1574 if (params) {
1575 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1576 if (type == NL80211_IFTYPE_STATION)
1577 sdata->u.mgd.use_4addr = params->use_4addr;
1578 }
9bc383de 1579
f142c6b9 1580 ndev->features |= local->hw.netdev_features;
72d78728 1581
f142c6b9
JB		 1582 ret = register_netdevice(ndev);
1583 if (ret) {
1584 free_netdev(ndev);
1585 return ret;
1586 }
1587 }
f0706e82 1588
c771c9d8 1589 mutex_lock(&local->iflist_mtx);
79010420 1590 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1591 mutex_unlock(&local->iflist_mtx);
79010420 1592
84efbb84
JB		 1593 if (new_wdev)
1594 *new_wdev = &sdata->wdev;
f0706e82 1595
f0706e82 1596 return 0;
f0706e82
JB		 1597}
1598
f698d856 1599void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1600{
f0706e82 1601 ASSERT_RTNL();
11a843b7 1602
c771c9d8 1603 mutex_lock(&sdata->local->iflist_mtx);
75636525 1604 list_del_rcu(&sdata->list);
c771c9d8
JB		 1605 mutex_unlock(&sdata->local->iflist_mtx);
1606
75636525 1607 synchronize_rcu();
f142c6b9
JB		 1608
1609 if (sdata->dev) {
1610 unregister_netdevice(sdata->dev);
1611 } else {
1612 cfg80211_unregister_wdev(&sdata->wdev);
1613 kfree(sdata);
1614 }
1615}
1616
1617void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1618{
1619 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1620 return;
1621 ieee80211_do_stop(sdata, true);
1622 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1623}
1624
75636525
JB		 1625/*
1626 * Remove all interfaces, may only be called at hardware unregistration
1627 * time because it doesn't do RCU-safe list removals.
1628 */
1629void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1630{
75636525 1631 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1632 LIST_HEAD(unreg_list);
f142c6b9 1633 LIST_HEAD(wdev_list);
f0706e82
JB		 1634
1635 ASSERT_RTNL();
1636
efe117ab 1637 mutex_lock(&local->iflist_mtx);
75636525
JB		 1638 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1639 list_del(&sdata->list);
c771c9d8 1640
f142c6b9
JB		 1641 if (sdata->dev)
1642 unregister_netdevice_queue(sdata->dev, &unreg_list);
1643 else
1644 list_add(&sdata->list, &wdev_list);
f0706e82 1645 }
efe117ab
ED		 1646 mutex_unlock(&local->iflist_mtx);
1647 unregister_netdevice_many(&unreg_list);
5f04d506 1648 list_del(&unreg_list);
f142c6b9
JB		 1649
1650 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1651 list_del(&sdata->list);
1652 cfg80211_unregister_wdev(&sdata->wdev);
1653 kfree(sdata);
1654 }
f0706e82 1655}
5cff20e6 1656
47846c9b
JB		 1657static int netdev_notify(struct notifier_block *nb,
1658 unsigned long state,
1659 void *ndev)
1660{
1661 struct net_device *dev = ndev;
1662 struct ieee80211_sub_if_data *sdata;
1663
1664 if (state != NETDEV_CHANGENAME)
1665 return 0;
1666
1667 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1668 return 0;
1669
1670 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1671 return 0;
1672
1673 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1674
2f5265e6 1675 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1676
1677 ieee80211_debugfs_rename_netdev(sdata);
1678 return 0;
1679}
1680
1681static struct notifier_block mac80211_netdev_notifier = {
1682 .notifier_call = netdev_notify,
1683};
1684
1685int ieee80211_iface_init(void)
1686{
1687 return register_netdevice_notifier(&mac80211_netdev_notifier);
1688}
1689
1690void ieee80211_iface_exit(void)
1691{
1692 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1693}
Linux kernel - Deliverables
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