]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/mac80211/iface.c
mac80211: fix fragmentation code, particularly for encryption
[mirror_ubuntu-bionic-kernel.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
0430c883 57 power = ieee80211_chandef_max_power(&chanctx_conf->def);
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
62a40a15 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
62a40a15 90static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB
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
62a40a15
JB
101static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
102 bool force_active)
cc45ae54 103{
fd0f979a 104 bool working = false, scanning, active;
cc45ae54
JB
105 unsigned int led_trig_start = 0, led_trig_stop = 0;
106 struct ieee80211_roc_work *roc;
107
cc45ae54
JB
108 lockdep_assert_held(&local->mtx);
109
62a40a15
JB
110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
112 local->monitors;
cc45ae54
JB
113
114 if (!local->ops->remain_on_channel) {
115 list_for_each_entry(roc, &local->roc_list, list) {
116 working = true;
fd0f979a 117 break;
cc45ae54
JB
118 }
119 }
120
f1e3e051
JB
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 123
cc45ae54
JB
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128
fd0f979a 129 if (active)
cc45ae54
JB
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 else
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135
fd0f979a 136 if (working || scanning || active)
62a40a15
JB
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
139}
140
141u32 ieee80211_idle_off(struct ieee80211_local *local)
142{
143 return __ieee80211_recalc_idle(local, true);
144}
145
146void ieee80211_recalc_idle(struct ieee80211_local *local)
147{
148 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB
149 if (change)
150 ieee80211_hw_config(local, change);
cc45ae54
JB
151}
152
0d143fe1
JB
153static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
154{
09b1426e 155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 156 return -EINVAL;
0d143fe1 157
0d143fe1
JB
158 dev->mtu = new_mtu;
159 return 0;
160}
161
3899ba90 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 163 bool check_dup)
478622e8 164{
ac20976d
HS
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
478622e8
HS
167 u64 new, mask, tmp;
168 u8 *m;
169 int ret = 0;
170
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
172 return 0;
173
174 m = addr;
175 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183
31eba5bc
FF
184 if (!check_dup)
185 return ret;
478622e8
HS
186
187 mutex_lock(&local->iflist_mtx);
ac20976d
HS
188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
478622e8
HS
190 continue;
191
3899ba90
JL
192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS
194 continue;
195
ac20976d 196 m = iter->vif.addr;
478622e8
HS
197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206 mutex_unlock(&local->iflist_mtx);
207
208 return ret;
209}
210
47846c9b
JB
211static int ieee80211_change_mac(struct net_device *dev, void *addr)
212{
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 214 struct sockaddr *sa = addr;
31eba5bc 215 bool check_dup = true;
47846c9b
JB
216 int ret;
217
9607e6b6 218 if (ieee80211_sdata_running(sdata))
47846c9b
JB
219 return -EBUSY;
220
31eba5bc
FF
221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
222 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
223 check_dup = false;
224
3899ba90 225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS
226 if (ret)
227 return ret;
228
fc5f7577 229 ret = eth_mac_addr(dev, sa);
47846c9b
JB
230
231 if (ret == 0)
fc5f7577 232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB
233
234 return ret;
235}
236
0d143fe1
JB
237static inline int identical_mac_addr_allowed(int type1, int type2)
238{
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB
241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB
243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
251}
252
87490f6d
JB
253static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
0d143fe1 255{
b4a4bf5d 256 struct ieee80211_local *local = sdata->local;
87490f6d 257 struct ieee80211_sub_if_data *nsdata;
0d143fe1 258
87490f6d 259 ASSERT_RTNL();
0d143fe1
JB
260
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 263 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB
264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
87490f6d 274 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
73da7d5b
SW
277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
0d143fe1
JB
283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
371a255e
JB
288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
0d143fe1
JB
290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
87490f6d 295 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB
296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
87490f6d 302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
87490f6d
JB
308 return 0;
309}
310
a9865538
JB
311static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
3a25a8c8
JB
313{
314 int n_queues = sdata->local->hw.queues;
315 int i;
316
a9865538 317 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP
318 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
319 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
320 IEEE80211_INVAL_HW_QUEUE))
321 return -EINVAL;
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
323 n_queues))
324 return -EINVAL;
325 }
3a25a8c8
JB
326 }
327
a9865538
JB
328 if ((iftype != NL80211_IFTYPE_AP &&
329 iftype != NL80211_IFTYPE_P2P_GO &&
330 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 331 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB
332 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
333 return 0;
334 }
335
336 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338
339 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
340 return -EINVAL;
341
342 return 0;
343}
344
85416a4f
CL
345void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
346 const int offset)
347{
348 struct ieee80211_local *local = sdata->local;
349 u32 flags = sdata->u.mntr_flags;
350
351#define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
354 } while (0)
355
356 ADJUST(FCSFAIL, fcsfail);
357 ADJUST(PLCPFAIL, plcpfail);
358 ADJUST(CONTROL, control);
359 ADJUST(CONTROL, pspoll);
360 ADJUST(OTHER_BSS, other_bss);
361
362#undef ADJUST
363}
364
3a25a8c8
JB
365static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
366{
367 struct ieee80211_local *local = sdata->local;
368 int i;
369
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
372 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 373 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 374 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB
375 else
376 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB
377 }
378 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
379}
380
3c3e21e7 381int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB
382{
383 struct ieee80211_sub_if_data *sdata;
8b305780 384 int ret;
4b6f1dd6
JB
385
386 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
387 return 0;
388
8b305780 389 ASSERT_RTNL();
685fb72b 390
4b6f1dd6 391 if (local->monitor_sdata)
8b305780 392 return 0;
4b6f1dd6
JB
393
394 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB
395 if (!sdata)
396 return -ENOMEM;
4b6f1dd6
JB
397
398 /* set up data */
399 sdata->local = local;
400 sdata->vif.type = NL80211_IFTYPE_MONITOR;
401 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
402 wiphy_name(local->hw.wiphy));
403
2475b1cc
MS
404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
405
3a25a8c8
JB
406 ieee80211_set_default_queues(sdata);
407
4b6f1dd6
JB
408 ret = drv_add_interface(local, sdata);
409 if (WARN_ON(ret)) {
410 /* ok .. stupid driver, it asked for this! */
411 kfree(sdata);
8b305780 412 return ret;
4b6f1dd6
JB
413 }
414
a9865538 415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB
416 if (ret) {
417 kfree(sdata);
8b305780 418 return ret;
3a25a8c8
JB
419 }
420
34a3740d 421 mutex_lock(&local->mtx);
4bf88530 422 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 423 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 424 mutex_unlock(&local->mtx);
55de908a
JB
425 if (ret) {
426 drv_remove_interface(local, sdata);
427 kfree(sdata);
8b305780 428 return ret;
55de908a
JB
429 }
430
8b305780 431 mutex_lock(&local->iflist_mtx);
4b6f1dd6 432 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 433 mutex_unlock(&local->iflist_mtx);
8b305780
JB
434
435 return 0;
4b6f1dd6
JB
436}
437
3c3e21e7 438void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB
439{
440 struct ieee80211_sub_if_data *sdata;
441
442 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
443 return;
444
8b305780
JB
445 ASSERT_RTNL();
446
685fb72b 447 mutex_lock(&local->iflist_mtx);
4b6f1dd6 448
685fb72b
JB
449 sdata = rcu_dereference_protected(local->monitor_sdata,
450 lockdep_is_held(&local->iflist_mtx));
8b305780
JB
451 if (!sdata) {
452 mutex_unlock(&local->iflist_mtx);
453 return;
454 }
4b6f1dd6
JB
455
456 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB
457 mutex_unlock(&local->iflist_mtx);
458
4b6f1dd6
JB
459 synchronize_net();
460
34a3740d 461 mutex_lock(&local->mtx);
55de908a 462 ieee80211_vif_release_channel(sdata);
34a3740d 463 mutex_unlock(&local->mtx);
55de908a 464
4b6f1dd6
JB
465 drv_remove_interface(local, sdata);
466
467 kfree(sdata);
468}
469
34d4bc4d
JB
470/*
471 * NOTE: Be very careful when changing this function, it must NOT return
472 * an error on interface type changes that have been pre-checked, so most
473 * checks should be in ieee80211_check_concurrent_iface.
474 */
f142c6b9 475int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 476{
f142c6b9
JB
477 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
478 struct net_device *dev = wdev->netdev;
87490f6d
JB
479 struct ieee80211_local *local = sdata->local;
480 struct sta_info *sta;
481 u32 changed = 0;
482 int res;
483 u32 hw_reconf_flags = 0;
484
0d143fe1
JB
485 switch (sdata->vif.type) {
486 case NL80211_IFTYPE_WDS:
487 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
488 return -ENOLINK;
489 break;
665c93a9
JB
490 case NL80211_IFTYPE_AP_VLAN: {
491 struct ieee80211_sub_if_data *master;
492
0d143fe1
JB
493 if (!sdata->bss)
494 return -ENOLINK;
665c93a9 495
0d143fe1 496 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB
497
498 master = container_of(sdata->bss,
499 struct ieee80211_sub_if_data, u.ap);
500 sdata->control_port_protocol =
501 master->control_port_protocol;
502 sdata->control_port_no_encrypt =
503 master->control_port_no_encrypt;
1351c5d3
JB
504 sdata->vif.cab_queue = master->vif.cab_queue;
505 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
506 sizeof(sdata->vif.hw_queue));
0d143fe1 507 break;
665c93a9 508 }
0d143fe1
JB
509 case NL80211_IFTYPE_AP:
510 sdata->bss = &sdata->u.ap;
511 break;
512 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB
513 case NL80211_IFTYPE_STATION:
514 case NL80211_IFTYPE_MONITOR:
515 case NL80211_IFTYPE_ADHOC:
f142c6b9 516 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB
517 /* no special treatment */
518 break;
519 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 520 case NUM_NL80211_IFTYPES:
2ca27bcf
JB
521 case NL80211_IFTYPE_P2P_CLIENT:
522 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB
523 /* cannot happen */
524 WARN_ON(1);
525 break;
526 }
527
528 if (local->open_count == 0) {
24487981 529 res = drv_start(local);
0d143fe1
JB
530 if (res)
531 goto err_del_bss;
e8975581
JB
532 /* we're brought up, everything changes */
533 hw_reconf_flags = ~0;
1f87f7d3 534 ieee80211_led_radio(local, true);
67408c8c
JB
535 ieee80211_mod_tpt_led_trig(local,
536 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB
537 }
538
539 /*
bf533e0b
JB
540 * Copy the hopefully now-present MAC address to
541 * this interface, if it has the special null one.
0d143fe1 542 */
f142c6b9 543 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB
544 memcpy(dev->dev_addr,
545 local->hw.wiphy->perm_addr,
546 ETH_ALEN);
547 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
548
549 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB
550 res = -EADDRNOTAVAIL;
551 goto err_stop;
0adc23f5 552 }
0d143fe1
JB
553 }
554
0d143fe1
JB
555 switch (sdata->vif.type) {
556 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB
557 /* no need to tell driver, but set carrier and chanctx */
558 if (rtnl_dereference(sdata->bss->beacon)) {
559 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 560 netif_carrier_on(dev);
4d76d21b 561 } else {
3edaf3e6 562 netif_carrier_off(dev);
4d76d21b 563 }
0d143fe1
JB
564 break;
565 case NL80211_IFTYPE_MONITOR:
566 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
567 local->cooked_mntrs++;
568 break;
569 }
570
31eba5bc
FF
571 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
572 res = drv_add_interface(local, sdata);
573 if (res)
574 goto err_stop;
575 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB
576 res = ieee80211_add_virtual_monitor(local);
577 if (res)
578 goto err_stop;
579 }
580
0d143fe1
JB
581 /* must be before the call to ieee80211_configure_filter */
582 local->monitors++;
e8975581 583 if (local->monitors == 1) {
0869aea0
JB
584 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
585 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 586 }
0d143fe1 587
85416a4f 588 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 589 ieee80211_configure_filter(local);
801d929c
FF
590 mutex_lock(&local->mtx);
591 ieee80211_recalc_idle(local);
592 mutex_unlock(&local->mtx);
53e9b1de
DG
593
594 netif_carrier_on(dev);
0d143fe1 595 break;
0d143fe1 596 default:
34d4bc4d 597 if (coming_up) {
075e0847
JB
598 ieee80211_del_virtual_monitor(local);
599
7b7eab6f 600 res = drv_add_interface(local, sdata);
34d4bc4d
JB
601 if (res)
602 goto err_stop;
a9865538
JB
603 res = ieee80211_check_queues(sdata,
604 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB
605 if (res)
606 goto err_del_interface;
34d4bc4d 607 }
0d143fe1 608
29cbe68c 609 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 610 local->fif_pspoll++;
7be5086d 611 local->fif_probe_req++;
e3b90ca2 612
e3b90ca2 613 ieee80211_configure_filter(local);
7be5086d
JB
614 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
615 local->fif_probe_req++;
a3c9aa51 616 }
e3b90ca2 617
f142c6b9
JB
618 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
619 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 620 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 621
c405c629
JB
622 switch (sdata->vif.type) {
623 case NL80211_IFTYPE_STATION:
624 case NL80211_IFTYPE_ADHOC:
625 case NL80211_IFTYPE_AP:
626 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 627 netif_carrier_off(dev);
c405c629 628 break;
1411af15 629 case NL80211_IFTYPE_WDS:
f142c6b9 630 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 631 break;
c405c629 632 default:
a2310824
JB
633 /* not reached */
634 WARN_ON(1);
c405c629 635 }
59034591
EP
636
637 /*
638 * set default queue parameters so drivers don't
639 * need to initialise the hardware if the hardware
640 * doesn't start up with sane defaults
641 */
3abead59 642 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB
643 }
644
2d2080c3
JB
645 set_bit(SDATA_STATE_RUNNING, &sdata->state);
646
0d143fe1
JB
647 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
648 /* Create STA entry for the WDS peer */
649 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
650 GFP_KERNEL);
651 if (!sta) {
652 res = -ENOMEM;
653 goto err_del_interface;
654 }
655
83d5cc01
JB
656 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
657 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
658 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB
659
660 res = sta_info_insert(sta);
661 if (res) {
662 /* STA has been freed */
663 goto err_del_interface;
664 }
1be7fe8d
BJ
665
666 rate_control_rate_init(sta);
1411af15 667 netif_carrier_on(dev);
f142c6b9
JB
668 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
669 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB
670 }
671
0d143fe1
JB
672 /*
673 * set_multicast_list will be invoked by the networking core
674 * which will check whether any increments here were done in
675 * error and sync them down to the hardware as filter flags.
676 */
677 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
678 atomic_inc(&local->iff_allmultis);
679
680 if (sdata->flags & IEEE80211_SDATA_PROMISC)
681 atomic_inc(&local->iff_promiscs);
682
34d4bc4d
JB
683 if (coming_up)
684 local->open_count++;
685
59034591 686 if (hw_reconf_flags)
e8975581 687 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 688
10f644a4 689 ieee80211_recalc_ps(local, -1);
965bedad 690
2b436312
JB
691 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
692 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
693 /* XXX: for AP_VLAN, actually track AP queues */
694 netif_tx_start_all_queues(dev);
695 } else if (dev) {
2b730daa
JB
696 unsigned long flags;
697 int n_acs = IEEE80211_NUM_ACS;
698 int ac;
699
700 if (local->hw.queues < IEEE80211_NUM_ACS)
701 n_acs = 1;
702
703 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
704 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
705 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
706 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
707 for (ac = 0; ac < n_acs; ac++) {
708 int ac_queue = sdata->vif.hw_queue[ac];
709
710 if (local->queue_stop_reasons[ac_queue] == 0 &&
711 skb_queue_empty(&local->pending[ac_queue]))
712 netif_start_subqueue(dev, ac);
713 }
714 }
715 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
716 }
0d143fe1
JB
717
718 return 0;
719 err_del_interface:
7b7eab6f 720 drv_remove_interface(local, sdata);
0d143fe1 721 err_stop:
24487981
JB
722 if (!local->open_count)
723 drv_stop(local);
0d143fe1
JB
724 err_del_bss:
725 sdata->bss = NULL;
726 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
727 list_del(&sdata->u.vlan.list);
4d6c36fa 728 /* might already be clear but that doesn't matter */
2d2080c3 729 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB
730 return res;
731}
732
34d4bc4d 733static int ieee80211_open(struct net_device *dev)
0d143fe1
JB
734{
735 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB
736 int err;
737
738 /* fail early if user set an invalid address */
2fcf2824 739 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB
740 return -EADDRNOTAVAIL;
741
742 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
743 if (err)
744 return err;
745
f142c6b9 746 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB
747}
748
749static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
750 bool going_down)
751{
0d143fe1 752 struct ieee80211_local *local = sdata->local;
5061b0c2
JB
753 unsigned long flags;
754 struct sk_buff *skb, *tmp;
e8975581 755 u32 hw_reconf_flags = 0;
09f4114e 756 int i, flushed;
397a7a24 757 struct ps_data *ps;
d2859df5 758 struct cfg80211_chan_def chandef;
0d143fe1 759
c29acf20
RM
760 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
761
e2fd5dbc 762 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC
763 ieee80211_scan_cancel(local);
764
0d143fe1
JB
765 /*
766 * Stop TX on this interface first.
767 */
f142c6b9
JB
768 if (sdata->dev)
769 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 770
c8f994ee 771 ieee80211_roc_purge(local, sdata);
af6b6374 772
8ffcc704
EG
773 switch (sdata->vif.type) {
774 case NL80211_IFTYPE_STATION:
572078be 775 ieee80211_mgd_stop(sdata);
8ffcc704
EG
776 break;
777 case NL80211_IFTYPE_ADHOC:
cd7760e6 778 ieee80211_ibss_stop(sdata);
8ffcc704
EG
779 break;
780 case NL80211_IFTYPE_AP:
781 cancel_work_sync(&sdata->u.ap.request_smps_work);
782 break;
783 default:
784 break;
785 }
cd7760e6 786
0d143fe1
JB
787 /*
788 * Remove all stations associated with this interface.
789 *
790 * This must be done before calling ops->remove_interface()
791 * because otherwise we can later invoke ops->sta_notify()
792 * whenever the STAs are removed, and that invalidates driver
793 * assumptions about always getting a vif pointer that is valid
794 * (because if we remove a STA after ops->remove_interface()
795 * the driver will have removed the vif info already!)
796 *
09f4114e
JB
797 * This is relevant only in WDS mode, in all other modes we've
798 * already removed all stations when disconnecting or similar,
799 * so warn otherwise.
0d143fe1 800 */
d34ba216 801 flushed = sta_info_flush(sdata);
09f4114e
JB
802 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
803 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 804
afdc7c18 805 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB
806 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
807 atomic_dec(&local->iff_allmultis);
808
809 if (sdata->flags & IEEE80211_SDATA_PROMISC)
810 atomic_dec(&local->iff_promiscs);
811
7be5086d 812 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 813 local->fif_pspoll--;
7be5086d
JB
814 local->fif_probe_req--;
815 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
816 local->fif_probe_req--;
817 }
e3b90ca2 818
f142c6b9
JB
819 if (sdata->dev) {
820 netif_addr_lock_bh(sdata->dev);
821 spin_lock_bh(&local->filter_lock);
822 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
823 sdata->dev->addr_len);
824 spin_unlock_bh(&local->filter_lock);
825 netif_addr_unlock_bh(sdata->dev);
f142c6b9 826 }
3ac64bee 827
7cbf0ba5
VN
828 del_timer_sync(&local->dynamic_ps_timer);
829 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 830
04ecd257 831 cancel_work_sync(&sdata->recalc_smps);
73da7d5b
SW
832 sdata->vif.csa_active = false;
833 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 834
164eb02d
SW
835 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
836
837 if (sdata->wdev.cac_started) {
d2859df5 838 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 839 WARN_ON(local->suspended);
34a3740d 840 mutex_lock(&local->mtx);
164eb02d 841 ieee80211_vif_release_channel(sdata);
34a3740d 842 mutex_unlock(&local->mtx);
d2859df5
JD
843 cfg80211_cac_event(sdata->dev, &chandef,
844 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW
845 GFP_KERNEL);
846 }
847
0d143fe1
JB
848 /* APs need special treatment */
849 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 850 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB
851
852 /* down all dependent devices, that is VLANs */
57c9fff3 853 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB
854 u.vlan.list)
855 dev_close(vlan->dev);
856 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB
857 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
858 /* remove all packets in parent bc_buf pointing to this dev */
859 ps = &sdata->bss->ps;
860
861 spin_lock_irqsave(&ps->bc_buf.lock, flags);
862 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
863 if (skb->dev == sdata->dev) {
864 __skb_unlink(skb, &ps->bc_buf);
865 local->total_ps_buffered--;
866 ieee80211_free_txskb(&local->hw, skb);
867 }
868 }
869 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB
870 }
871
34d4bc4d
JB
872 if (going_down)
873 local->open_count--;
0d143fe1
JB
874
875 switch (sdata->vif.type) {
876 case NL80211_IFTYPE_AP_VLAN:
877 list_del(&sdata->u.vlan.list);
4d76d21b 878 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB
879 /* no need to tell driver */
880 break;
881 case NL80211_IFTYPE_MONITOR:
882 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
883 local->cooked_mntrs--;
884 break;
885 }
886
887 local->monitors--;
e8975581 888 if (local->monitors == 0) {
0869aea0
JB
889 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
890 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 891 }
0d143fe1 892
85416a4f 893 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 894 break;
f142c6b9
JB
895 case NL80211_IFTYPE_P2P_DEVICE:
896 /* relies on synchronize_rcu() below */
897 rcu_assign_pointer(local->p2p_sdata, NULL);
898 /* fall through */
0d143fe1 899 default:
0b7dff4f 900 cancel_work_sync(&sdata->work);
35f20c14
JB
901 /*
902 * When we get here, the interface is marked down.
7907c7d3
JB
903 * Free the remaining keys, if there are any
904 * (shouldn't be, except maybe in WDS mode?)
75de9113 905 *
7907c7d3
JB
906 * Force the key freeing to always synchronize_net()
907 * to wait for the RX path in case it is using this
908 * interface enqueuing frames * at this very time on
75de9113 909 * another CPU.
35f20c14 910 */
7907c7d3 911 ieee80211_free_keys(sdata, true);
b9dcf712 912
1861b845
JB
913 /* fall through */
914 case NL80211_IFTYPE_AP:
915 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB
916 }
917
918 sdata->bss = NULL;
919
5061b0c2
JB
920 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
921 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
922 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
923 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
924 if (info->control.vif == &sdata->vif) {
925 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 926 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB
927 }
928 }
929 }
930 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 931
b2c0958b
JB
932 if (local->open_count == 0)
933 ieee80211_clear_tx_pending(local);
934
935 /*
936 * If the interface goes down while suspended, presumably because
937 * the device was unplugged and that happens before our resume,
938 * then the driver is already unconfigured and the remainder of
939 * this function isn't needed.
940 * XXX: what about WoWLAN? If the device has software state, e.g.
941 * memory allocated, it might expect teardown commands from
942 * mac80211 here?
943 */
944 if (local->suspended) {
945 WARN_ON(local->wowlan);
946 WARN_ON(rtnl_dereference(local->monitor_sdata));
947 return;
948 }
949
950 switch (sdata->vif.type) {
951 case NL80211_IFTYPE_AP_VLAN:
952 break;
953 case NL80211_IFTYPE_MONITOR:
954 if (local->monitors == 0)
955 ieee80211_del_virtual_monitor(local);
956
957 mutex_lock(&local->mtx);
958 ieee80211_recalc_idle(local);
959 mutex_unlock(&local->mtx);
31eba5bc
FF
960
961 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
962 break;
963
964 /* fall through */
b2c0958b
JB
965 default:
966 if (going_down)
967 drv_remove_interface(local, sdata);
968 }
969
970 ieee80211_recalc_ps(local, -1);
971
972 if (local->open_count == 0) {
973 ieee80211_stop_device(local);
974
975 /* no reconfiguring after stop! */
976 return;
977 }
978
979 /* do after stop to avoid reconfiguring when we stop anyway */
980 ieee80211_configure_filter(local);
981 ieee80211_hw_config(local, hw_reconf_flags);
982
983 if (local->monitors == local->open_count)
075e0847 984 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB
985}
986
987static int ieee80211_stop(struct net_device *dev)
988{
989 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
990
991 ieee80211_do_stop(sdata, true);
5061b0c2 992
0d143fe1
JB
993 return 0;
994}
995
996static void ieee80211_set_multicast_list(struct net_device *dev)
997{
0d143fe1 998 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 999 struct ieee80211_local *local = sdata->local;
0d143fe1
JB
1000 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1001
1002 allmulti = !!(dev->flags & IFF_ALLMULTI);
1003 promisc = !!(dev->flags & IFF_PROMISC);
1004 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1005 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1006
1007 if (allmulti != sdata_allmulti) {
1008 if (dev->flags & IFF_ALLMULTI)
1009 atomic_inc(&local->iff_allmultis);
1010 else
1011 atomic_dec(&local->iff_allmultis);
1012 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1013 }
1014
1015 if (promisc != sdata_promisc) {
1016 if (dev->flags & IFF_PROMISC)
1017 atomic_inc(&local->iff_promiscs);
1018 else
1019 atomic_dec(&local->iff_promiscs);
1020 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1021 }
3b8d81e0 1022 spin_lock_bh(&local->filter_lock);
22bedad3 1023 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1024 spin_unlock_bh(&local->filter_lock);
3ac64bee 1025 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB
1026}
1027
75636525
JB
1028/*
1029 * Called when the netdev is removed or, by the code below, before
1030 * the interface type changes.
1031 */
f142c6b9 1032static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB
1033{
1034 int i;
1035
75636525 1036 /* free extra data */
7907c7d3 1037 ieee80211_free_keys(sdata, false);
75636525 1038
aee14ceb
JM
1039 ieee80211_debugfs_remove_netdev(sdata);
1040
f0706e82 1041 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB
1042 __skb_queue_purge(&sdata->fragments[i].skb_list);
1043 sdata->fragment_next = 0;
11a843b7 1044
b9dcf712
JB
1045 if (ieee80211_vif_is_mesh(&sdata->vif))
1046 mesh_rmc_free(sdata);
f0706e82
JB
1047}
1048
f142c6b9
JB
1049static void ieee80211_uninit(struct net_device *dev)
1050{
1051 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1052}
1053
cf0277e7 1054static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a
JW
1055 struct sk_buff *skb,
1056 void *accel_priv)
cf0277e7
JB
1057{
1058 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1059}
1060
587e729e
JB
1061static const struct net_device_ops ieee80211_dataif_ops = {
1062 .ndo_open = ieee80211_open,
1063 .ndo_stop = ieee80211_stop,
f142c6b9 1064 .ndo_uninit = ieee80211_uninit,
587e729e 1065 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1066 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1067 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1068 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1069 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB
1070};
1071
cf0277e7 1072static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a
JW
1073 struct sk_buff *skb,
1074 void *accel_priv)
cf0277e7
JB
1075{
1076 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1077 struct ieee80211_local *local = sdata->local;
1078 struct ieee80211_hdr *hdr;
1079 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1080
32c5057b 1081 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB
1082 return 0;
1083
1084 if (skb->len < 4 ||
b49bb574 1085 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB
1086 return 0; /* doesn't matter, frame will be dropped */
1087
b49bb574 1088 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1089
00e96dec 1090 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB
1091}
1092
587e729e
JB
1093static const struct net_device_ops ieee80211_monitorif_ops = {
1094 .ndo_open = ieee80211_open,
1095 .ndo_stop = ieee80211_stop,
f142c6b9 1096 .ndo_uninit = ieee80211_uninit,
587e729e 1097 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1098 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1099 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1100 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1101 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB
1102};
1103
1104static void ieee80211_if_setup(struct net_device *dev)
1105{
1106 ether_setup(dev);
550fd08c 1107 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1108 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB
1109 dev->destructor = free_netdev;
1110}
1111
1fa57d01
JB
1112static void ieee80211_iface_work(struct work_struct *work)
1113{
1114 struct ieee80211_sub_if_data *sdata =
1115 container_of(work, struct ieee80211_sub_if_data, work);
1116 struct ieee80211_local *local = sdata->local;
1117 struct sk_buff *skb;
344eec67 1118 struct sta_info *sta;
c1475ca9 1119 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB
1120
1121 if (!ieee80211_sdata_running(sdata))
1122 return;
1123
1124 if (local->scanning)
1125 return;
1126
1127 /*
1128 * ieee80211_queue_work() should have picked up most cases,
1129 * here we'll pick the rest.
1130 */
1131 if (WARN(local->suspended,
1132 "interface work scheduled while going to suspend\n"))
1133 return;
1134
1135 /* first process frames */
1136 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB
1137 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1138
c1475ca9
JB
1139 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1140 ra_tid = (void *)&skb->cb;
1141 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1142 ra_tid->tid);
1143 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1144 ra_tid = (void *)&skb->cb;
1145 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1146 ra_tid->tid);
1147 } else if (ieee80211_is_action(mgmt->frame_control) &&
1148 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1149 int len = skb->len;
bed7ee6e 1150
a93e3644 1151 mutex_lock(&local->sta_mtx);
875ae5f6 1152 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB
1153 if (sta) {
1154 switch (mgmt->u.action.u.addba_req.action_code) {
1155 case WLAN_ACTION_ADDBA_REQ:
1156 ieee80211_process_addba_request(
1157 local, sta, mgmt, len);
1158 break;
1159 case WLAN_ACTION_ADDBA_RESP:
1160 ieee80211_process_addba_resp(local, sta,
1161 mgmt, len);
1162 break;
1163 case WLAN_ACTION_DELBA:
1164 ieee80211_process_delba(sdata, sta,
1165 mgmt, len);
1166 break;
1167 default:
1168 WARN_ON(1);
1169 break;
1170 }
1171 }
a93e3644 1172 mutex_unlock(&local->sta_mtx);
344eec67
JB
1173 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1174 struct ieee80211_hdr *hdr = (void *)mgmt;
1175 /*
1176 * So the frame isn't mgmt, but frame_control
1177 * is at the right place anyway, of course, so
1178 * the if statement is correct.
1179 *
1180 * Warn if we have other data frame types here,
1181 * they must not get here.
1182 */
1183 WARN_ON(hdr->frame_control &
1184 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1185 WARN_ON(!(hdr->seq_ctrl &
1186 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1187 /*
1188 * This was a fragment of a frame, received while
1189 * a block-ack session was active. That cannot be
1190 * right, so terminate the session.
1191 */
a93e3644 1192 mutex_lock(&local->sta_mtx);
875ae5f6 1193 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB
1194 if (sta) {
1195 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1196 IEEE80211_QOS_CTL_TID_MASK;
1197
1198 __ieee80211_stop_rx_ba_session(
1199 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB
1200 WLAN_REASON_QSTA_REQUIRE_SETUP,
1201 true);
344eec67 1202 }
a93e3644 1203 mutex_unlock(&local->sta_mtx);
bed7ee6e 1204 } else switch (sdata->vif.type) {
1fa57d01
JB
1205 case NL80211_IFTYPE_STATION:
1206 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1207 break;
1208 case NL80211_IFTYPE_ADHOC:
1209 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1210 break;
1211 case NL80211_IFTYPE_MESH_POINT:
1212 if (!ieee80211_vif_is_mesh(&sdata->vif))
1213 break;
1214 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1215 break;
1216 default:
1217 WARN(1, "frame for unexpected interface type");
1fa57d01
JB
1218 break;
1219 }
36b3a628
JB
1220
1221 kfree_skb(skb);
1fa57d01
JB
1222 }
1223
1224 /* then other type-dependent work */
1225 switch (sdata->vif.type) {
1226 case NL80211_IFTYPE_STATION:
1227 ieee80211_sta_work(sdata);
1228 break;
1229 case NL80211_IFTYPE_ADHOC:
1230 ieee80211_ibss_work(sdata);
1231 break;
1232 case NL80211_IFTYPE_MESH_POINT:
1233 if (!ieee80211_vif_is_mesh(&sdata->vif))
1234 break;
1235 ieee80211_mesh_work(sdata);
1236 break;
1237 default:
1238 break;
1239 }
1240}
1241
04ecd257
JB
1242static void ieee80211_recalc_smps_work(struct work_struct *work)
1243{
1244 struct ieee80211_sub_if_data *sdata =
1245 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1246
1247 ieee80211_recalc_smps(sdata);
1248}
1fa57d01 1249
75636525
JB
1250/*
1251 * Helper function to initialise an interface to a specific type.
1252 */
1253static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1254 enum nl80211_iftype type)
f0706e82 1255{
75636525
JB
1256 /* clear type-dependent union */
1257 memset(&sdata->u, 0, sizeof(sdata->u));
1258
1259 /* and set some type-dependent values */
1260 sdata->vif.type = type;
2ca27bcf 1261 sdata->vif.p2p = false;
60719ffd 1262 sdata->wdev.iftype = type;
75636525 1263
a621fa4d
JB
1264 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1265 sdata->control_port_no_encrypt = false;
2475b1cc 1266 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1267
b53be792
SW
1268 sdata->noack_map = 0;
1269
f142c6b9
JB
1270 /* only monitor/p2p-device differ */
1271 if (sdata->dev) {
1272 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1273 sdata->dev->type = ARPHRD_ETHER;
1274 }
75636525 1275
35f20c14 1276 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1277 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1278 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1279 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1280
75636525 1281 switch (type) {
2ca27bcf
JB
1282 case NL80211_IFTYPE_P2P_GO:
1283 type = NL80211_IFTYPE_AP;
1284 sdata->vif.type = type;
1285 sdata->vif.p2p = true;
1286 /* fall through */
05c914fe 1287 case NL80211_IFTYPE_AP:
d012a605 1288 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1289 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG
1290 INIT_WORK(&sdata->u.ap.request_smps_work,
1291 ieee80211_request_smps_ap_work);
ad2d223a 1292 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1293 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1294 break;
2ca27bcf
JB
1295 case NL80211_IFTYPE_P2P_CLIENT:
1296 type = NL80211_IFTYPE_STATION;
1297 sdata->vif.type = type;
1298 sdata->vif.p2p = true;
1299 /* fall through */
05c914fe 1300 case NL80211_IFTYPE_STATION:
ad2d223a 1301 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1302 ieee80211_sta_setup_sdata(sdata);
472dbc45 1303 break;
46900298 1304 case NL80211_IFTYPE_ADHOC:
ad2d223a 1305 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB
1306 ieee80211_ibss_setup_sdata(sdata);
1307 break;
05c914fe 1308 case NL80211_IFTYPE_MESH_POINT:
75636525
JB
1309 if (ieee80211_vif_is_mesh(&sdata->vif))
1310 ieee80211_mesh_init_sdata(sdata);
1311 break;
05c914fe 1312 case NL80211_IFTYPE_MONITOR:
75636525 1313 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1314 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB
1315 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1316 MONITOR_FLAG_OTHER_BSS;
1317 break;
05c914fe 1318 case NL80211_IFTYPE_WDS:
ad2d223a
JB
1319 sdata->vif.bss_conf.bssid = NULL;
1320 break;
05c914fe 1321 case NL80211_IFTYPE_AP_VLAN:
98104fde 1322 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1323 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1324 break;
05c914fe 1325 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1326 case NUM_NL80211_IFTYPES:
75636525
JB
1327 BUG();
1328 break;
1329 }
1330
1331 ieee80211_debugfs_add_netdev(sdata);
1332}
1333
34d4bc4d
JB
1334static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1335 enum nl80211_iftype type)
1336{
1337 struct ieee80211_local *local = sdata->local;
1338 int ret, err;
2ca27bcf
JB
1339 enum nl80211_iftype internal_type = type;
1340 bool p2p = false;
34d4bc4d
JB
1341
1342 ASSERT_RTNL();
1343
1344 if (!local->ops->change_interface)
1345 return -EBUSY;
1346
1347 switch (sdata->vif.type) {
1348 case NL80211_IFTYPE_AP:
1349 case NL80211_IFTYPE_STATION:
1350 case NL80211_IFTYPE_ADHOC:
1351 /*
1352 * Could maybe also all others here?
1353 * Just not sure how that interacts
1354 * with the RX/config path e.g. for
1355 * mesh.
1356 */
1357 break;
1358 default:
1359 return -EBUSY;
1360 }
1361
1362 switch (type) {
1363 case NL80211_IFTYPE_AP:
1364 case NL80211_IFTYPE_STATION:
1365 case NL80211_IFTYPE_ADHOC:
1366 /*
1367 * Could probably support everything
1368 * but WDS here (WDS do_open can fail
1369 * under memory pressure, which this
1370 * code isn't prepared to handle).
1371 */
1372 break;
2ca27bcf
JB
1373 case NL80211_IFTYPE_P2P_CLIENT:
1374 p2p = true;
1375 internal_type = NL80211_IFTYPE_STATION;
1376 break;
1377 case NL80211_IFTYPE_P2P_GO:
1378 p2p = true;
1379 internal_type = NL80211_IFTYPE_AP;
1380 break;
34d4bc4d
JB
1381 default:
1382 return -EBUSY;
1383 }
1384
2ca27bcf 1385 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB
1386 if (ret)
1387 return ret;
1388
1389 ieee80211_do_stop(sdata, false);
1390
f142c6b9 1391 ieee80211_teardown_sdata(sdata);
34d4bc4d 1392
2ca27bcf 1393 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1394 if (ret)
a9865538 1395 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1396
3a25a8c8
JB
1397 /*
1398 * Ignore return value here, there's not much we can do since
1399 * the driver changed the interface type internally already.
1400 * The warnings will hopefully make driver authors fix it :-)
1401 */
a9865538 1402 ieee80211_check_queues(sdata, type);
3a25a8c8 1403
34d4bc4d
JB
1404 ieee80211_setup_sdata(sdata, type);
1405
f142c6b9 1406 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB
1407 WARN(err, "type change: do_open returned %d", err);
1408
1409 return ret;
1410}
1411
f3947e2d 1412int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1413 enum nl80211_iftype type)
75636525 1414{
34d4bc4d
JB
1415 int ret;
1416
f3947e2d
JB
1417 ASSERT_RTNL();
1418
2ca27bcf 1419 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB
1420 return 0;
1421
34d4bc4d
JB
1422 if (ieee80211_sdata_running(sdata)) {
1423 ret = ieee80211_runtime_change_iftype(sdata, type);
1424 if (ret)
1425 return ret;
1426 } else {
1427 /* Purge and reset type-dependent state. */
f142c6b9 1428 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB
1429 ieee80211_setup_sdata(sdata, type);
1430 }
75636525
JB
1431
1432 /* reset some values that shouldn't be kept across type changes */
75636525 1433 sdata->drop_unencrypted = 0;
9bc383de
JB
1434 if (type == NL80211_IFTYPE_STATION)
1435 sdata->u.mgd.use_4addr = false;
f3947e2d
JB
1436
1437 return 0;
f0706e82
JB
1438}
1439
fa9029f8 1440static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1441 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB
1442{
1443 struct ieee80211_sub_if_data *sdata;
1444 u64 mask, start, addr, val, inc;
1445 u8 *m;
1446 u8 tmp_addr[ETH_ALEN];
1447 int i;
1448
1449 /* default ... something at least */
f142c6b9 1450 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB
1451
1452 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1453 local->hw.wiphy->n_addresses <= 1)
1454 return;
1455
fa9029f8
JB
1456 mutex_lock(&local->iflist_mtx);
1457
1458 switch (type) {
1459 case NL80211_IFTYPE_MONITOR:
1460 /* doesn't matter */
1461 break;
1462 case NL80211_IFTYPE_WDS:
1463 case NL80211_IFTYPE_AP_VLAN:
1464 /* match up with an AP interface */
1465 list_for_each_entry(sdata, &local->interfaces, list) {
1466 if (sdata->vif.type != NL80211_IFTYPE_AP)
1467 continue;
f142c6b9 1468 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB
1469 break;
1470 }
1471 /* keep default if no AP interface present */
1472 break;
6d71117a
JB
1473 case NL80211_IFTYPE_P2P_CLIENT:
1474 case NL80211_IFTYPE_P2P_GO:
1475 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1476 list_for_each_entry(sdata, &local->interfaces, list) {
1477 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1478 continue;
1479 if (!ieee80211_sdata_running(sdata))
1480 continue;
1481 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1482 goto out_unlock;
1483 }
1484 }
1485 /* otherwise fall through */
fa9029f8
JB
1486 default:
1487 /* assign a new address if possible -- try n_addresses first */
1488 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1489 bool used = false;
1490
1491 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1492 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1493 sdata->vif.addr)) {
fa9029f8
JB
1494 used = true;
1495 break;
1496 }
1497 }
1498
1499 if (!used) {
f142c6b9 1500 memcpy(perm_addr,
fa9029f8
JB
1501 local->hw.wiphy->addresses[i].addr,
1502 ETH_ALEN);
1503 break;
1504 }
1505 }
1506
1507 /* try mask if available */
1508 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1509 break;
1510
1511 m = local->hw.wiphy->addr_mask;
1512 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1513 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1514 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1515
1516 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1517 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1518 pr_info("not contiguous\n");
fa9029f8
JB
1519 break;
1520 }
1521
ac20976d
HS
1522 /*
1523 * Pick address of existing interface in case user changed
1524 * MAC address manually, default to perm_addr.
1525 */
fa9029f8 1526 m = local->hw.wiphy->perm_addr;
ac20976d
HS
1527 list_for_each_entry(sdata, &local->interfaces, list) {
1528 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1529 continue;
1530 m = sdata->vif.addr;
1531 break;
1532 }
fa9029f8
JB
1533 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1534 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1535 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1536
1537 inc = 1ULL<<__ffs64(mask);
1538 val = (start & mask);
1539 addr = (start & ~mask) | (val & mask);
1540 do {
1541 bool used = false;
1542
1543 tmp_addr[5] = addr >> 0*8;
1544 tmp_addr[4] = addr >> 1*8;
1545 tmp_addr[3] = addr >> 2*8;
1546 tmp_addr[2] = addr >> 3*8;
1547 tmp_addr[1] = addr >> 4*8;
1548 tmp_addr[0] = addr >> 5*8;
1549
1550 val += inc;
1551
1552 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1553 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB
1554 used = true;
1555 break;
1556 }
1557 }
1558
1559 if (!used) {
f142c6b9 1560 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB
1561 break;
1562 }
1563 addr = (start & ~mask) | (val & mask);
1564 } while (addr != start);
1565
1566 break;
1567 }
1568
6d71117a 1569 out_unlock:
fa9029f8
JB
1570 mutex_unlock(&local->iflist_mtx);
1571}
1572
3e122be0 1573int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1574 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1575 struct vif_params *params)
f0706e82 1576{
f142c6b9 1577 struct net_device *ndev = NULL;
f0706e82 1578 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1579 int ret, i;
ded81f6b 1580 int txqs = 1;
f0706e82
JB
1581
1582 ASSERT_RTNL();
75636525 1583
f142c6b9
JB
1584 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1585 struct wireless_dev *wdev;
1586
1587 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1588 GFP_KERNEL);
1589 if (!sdata)
1590 return -ENOMEM;
1591 wdev = &sdata->wdev;
1592
1593 sdata->dev = NULL;
1594 strlcpy(sdata->name, name, IFNAMSIZ);
1595 ieee80211_assign_perm_addr(local, wdev->address, type);
1596 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1597 } else {
1598 if (local->hw.queues >= IEEE80211_NUM_ACS)
1599 txqs = IEEE80211_NUM_ACS;
1600
1601 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1602 local->hw.vif_data_size,
1603 name, ieee80211_if_setup, txqs, 1);
1604 if (!ndev)
1605 return -ENOMEM;
1606 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1607
1608 ndev->needed_headroom = local->tx_headroom +
1609 4*6 /* four MAC addresses */
1610 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1611 + 6 /* mesh */
1612 + 8 /* rfc1042/bridge tunnel */
1613 - ETH_HLEN /* ethernet hard_header_len */
1614 + IEEE80211_ENCRYPT_HEADROOM;
1615 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1616
1617 ret = dev_alloc_name(ndev, ndev->name);
1618 if (ret < 0) {
1619 free_netdev(ndev);
1620 return ret;
1621 }
1622
1623 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1624 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1625 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1626
1627 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1628 sdata = netdev_priv(ndev);
1629 ndev->ieee80211_ptr = &sdata->wdev;
1630 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1631 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1632
1633 sdata->dev = ndev;
1634 }
75636525
JB
1635
1636 /* initialise type-independent data */
f0706e82 1637 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1638 sdata->local = local;
75636525
JB
1639
1640 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1641 skb_queue_head_init(&sdata->fragments[i].skb_list);
1642
1643 INIT_LIST_HEAD(&sdata->key_list);
1644
164eb02d
SW
1645 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1646 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB
1647 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1648 ieee80211_delayed_tailroom_dec);
97f97b1f 1649
37eb0b16
JM
1650 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1651 struct ieee80211_supported_band *sband;
1652 sband = local->hw.wiphy->bands[i];
1653 sdata->rc_rateidx_mask[i] =
1654 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW
1655 if (sband)
1656 memcpy(sdata->rc_rateidx_mcs_mask[i],
1657 sband->ht_cap.mcs.rx_mask,
1658 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1659 else
1660 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1661 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1662 }
75636525 1663
3a25a8c8
JB
1664 ieee80211_set_default_queues(sdata);
1665
1ea6f9c0
JB
1666 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1667 sdata->user_power_level = local->user_power_level;
1668
2475b1cc
MS
1669 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1670
75636525
JB
1671 /* setup type-dependent data */
1672 ieee80211_setup_sdata(sdata, type);
f0706e82 1673
f142c6b9
JB
1674 if (ndev) {
1675 if (params) {
1676 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1677 if (type == NL80211_IFTYPE_STATION)
1678 sdata->u.mgd.use_4addr = params->use_4addr;
1679 }
9bc383de 1680
f142c6b9 1681 ndev->features |= local->hw.netdev_features;
72d78728 1682
f142c6b9
JB
1683 ret = register_netdevice(ndev);
1684 if (ret) {
1685 free_netdev(ndev);
1686 return ret;
1687 }
1688 }
f0706e82 1689
c771c9d8 1690 mutex_lock(&local->iflist_mtx);
79010420 1691 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1692 mutex_unlock(&local->iflist_mtx);
79010420 1693
84efbb84
JB
1694 if (new_wdev)
1695 *new_wdev = &sdata->wdev;
f0706e82 1696
f0706e82 1697 return 0;
f0706e82
JB
1698}
1699
f698d856 1700void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1701{
f0706e82 1702 ASSERT_RTNL();
11a843b7 1703
c771c9d8 1704 mutex_lock(&sdata->local->iflist_mtx);
75636525 1705 list_del_rcu(&sdata->list);
c771c9d8
JB
1706 mutex_unlock(&sdata->local->iflist_mtx);
1707
75636525 1708 synchronize_rcu();
f142c6b9
JB
1709
1710 if (sdata->dev) {
1711 unregister_netdevice(sdata->dev);
1712 } else {
1713 cfg80211_unregister_wdev(&sdata->wdev);
1714 kfree(sdata);
1715 }
1716}
1717
1718void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1719{
1720 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1721 return;
1722 ieee80211_do_stop(sdata, true);
1723 ieee80211_teardown_sdata(sdata);
f0706e82
JB
1724}
1725
75636525
JB
1726/*
1727 * Remove all interfaces, may only be called at hardware unregistration
1728 * time because it doesn't do RCU-safe list removals.
1729 */
1730void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1731{
75636525 1732 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1733 LIST_HEAD(unreg_list);
f142c6b9 1734 LIST_HEAD(wdev_list);
f0706e82
JB
1735
1736 ASSERT_RTNL();
1737
c8aa22db
JB
1738 /*
1739 * Close all AP_VLAN interfaces first, as otherwise they
1740 * might be closed while the AP interface they belong to
1741 * is closed, causing unregister_netdevice_many() to crash.
1742 */
1743 list_for_each_entry(sdata, &local->interfaces, list)
1744 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1745 dev_close(sdata->dev);
1746
efe117ab 1747 mutex_lock(&local->iflist_mtx);
75636525
JB
1748 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1749 list_del(&sdata->list);
c771c9d8 1750
f142c6b9
JB
1751 if (sdata->dev)
1752 unregister_netdevice_queue(sdata->dev, &unreg_list);
1753 else
1754 list_add(&sdata->list, &wdev_list);
f0706e82 1755 }
efe117ab
ED
1756 mutex_unlock(&local->iflist_mtx);
1757 unregister_netdevice_many(&unreg_list);
5f04d506 1758 list_del(&unreg_list);
f142c6b9
JB
1759
1760 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1761 list_del(&sdata->list);
1762 cfg80211_unregister_wdev(&sdata->wdev);
1763 kfree(sdata);
1764 }
f0706e82 1765}
5cff20e6 1766
47846c9b 1767static int netdev_notify(struct notifier_block *nb,
351638e7 1768 unsigned long state, void *ptr)
47846c9b 1769{
351638e7 1770 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB
1771 struct ieee80211_sub_if_data *sdata;
1772
1773 if (state != NETDEV_CHANGENAME)
1774 return 0;
1775
1776 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1777 return 0;
1778
1779 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1780 return 0;
1781
1782 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1783
2f5265e6 1784 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB
1785
1786 ieee80211_debugfs_rename_netdev(sdata);
1787 return 0;
1788}
1789
1790static struct notifier_block mac80211_netdev_notifier = {
1791 .notifier_call = netdev_notify,
1792};
1793
1794int ieee80211_iface_init(void)
1795{
1796 return register_netdevice_notifier(&mac80211_netdev_notifier);
1797}
1798
1799void ieee80211_iface_exit(void)
1800{
1801 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1802}