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mac80211: reduce log spam from ieee80211_handle_pwr_constr
[mirror_ubuntu-hirsute-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>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
5a0e3ad6 14#include <linux/slab.h>
f0706e82
JB		 15#include <linux/kernel.h>
16#include <linux/if_arp.h>
17#include <linux/netdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/mac80211.h>
cf0277e7 20#include <net/ieee80211_radiotap.h>
f0706e82
JB		 21#include "ieee80211_i.h"
22#include "sta_info.h"
e9f207f0 23#include "debugfs_netdev.h"
ee385855 24#include "mesh.h"
0d143fe1 25#include "led.h"
24487981 26#include "driver-ops.h"
cf0277e7 27#include "wme.h"
1be7fe8d 28#include "rate.h"
0d143fe1 29
c771c9d8
JB		 30/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
1ea6f9c0
JB		 46bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47{
48 struct ieee80211_chanctx_conf *chanctx_conf;
49 int power;
50
51 rcu_read_lock();
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
53 if (!chanctx_conf) {
54 rcu_read_unlock();
55 return false;
56 }
57
0430c883 58 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 59 rcu_read_unlock();
60
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
63
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
66
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
70 return true;
71 }
72
73 return false;
74}
75
db82d8a9
LB		 76void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
77 bool update_bss)
1ea6f9c0 78{
db82d8a9 79 if (__ieee80211_recalc_txpower(sdata) || update_bss)
1ea6f9c0
JB		 80 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
81}
c771c9d8 82
62a40a15 83static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 84{
85 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
86 return 0;
87
88 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
89 return IEEE80211_CONF_CHANGE_IDLE;
90}
91
62a40a15 92static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 93{
94 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
95 return 0;
96
3b24f4c6 97 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 98
99 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
100 return IEEE80211_CONF_CHANGE_IDLE;
101}
102
62a40a15
JB		 103static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
104 bool force_active)
cc45ae54 105{
1d5e1266 106 bool working, scanning, active;
cc45ae54 107 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 108
cc45ae54
JB		 109 lockdep_assert_held(&local->mtx);
110
62a40a15
JB		 111 active = force_active ||
112 !list_empty(&local->chanctx_list) ||
113 local->monitors;
cc45ae54 114
1d5e1266
JB		 115 working = !local->ops->remain_on_channel &&
116 !list_empty(&local->roc_list);
cc45ae54 117
f1e3e051
JB		 118 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
119 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 120
cc45ae54
JB		 121 if (working || scanning)
122 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
123 else
124 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125
fd0f979a 126 if (active)
cc45ae54
JB		 127 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
128 else
129 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130
131 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
132
fd0f979a 133 if (working || scanning || active)
62a40a15
JB		 134 return __ieee80211_idle_off(local);
135 return __ieee80211_idle_on(local);
136}
137
138u32 ieee80211_idle_off(struct ieee80211_local *local)
139{
140 return __ieee80211_recalc_idle(local, true);
141}
142
143void ieee80211_recalc_idle(struct ieee80211_local *local)
144{
145 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 146 if (change)
147 ieee80211_hw_config(local, change);
cc45ae54
JB		 148}
149
0d143fe1
JB		 150static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
151{
09b1426e 152 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 153 return -EINVAL;
0d143fe1 154
0d143fe1
JB		 155 dev->mtu = new_mtu;
156 return 0;
157}
158
3899ba90 159static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 160 bool check_dup)
478622e8 161{
ac20976d
HS		 162 struct ieee80211_local *local = sdata->local;
163 struct ieee80211_sub_if_data *iter;
478622e8
HS		 164 u64 new, mask, tmp;
165 u8 *m;
166 int ret = 0;
167
168 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
169 return 0;
170
171 m = addr;
172 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
176 m = local->hw.wiphy->addr_mask;
177 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
178 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
179 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
180
31eba5bc
FF		 181 if (!check_dup)
182 return ret;
478622e8
HS		 183
184 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 185 list_for_each_entry(iter, &local->interfaces, list) {
186 if (iter == sdata)
478622e8
HS		 187 continue;
188
3899ba90
JL		 189 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
190 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 191 continue;
192
ac20976d 193 m = iter->vif.addr;
478622e8
HS		 194 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
195 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
196 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
197
198 if ((new & ~mask) != (tmp & ~mask)) {
199 ret = -EINVAL;
200 break;
201 }
202 }
203 mutex_unlock(&local->iflist_mtx);
204
205 return ret;
206}
207
47846c9b
JB		 208static int ieee80211_change_mac(struct net_device *dev, void *addr)
209{
210 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 211 struct sockaddr *sa = addr;
31eba5bc 212 bool check_dup = true;
47846c9b
JB		 213 int ret;
214
9607e6b6 215 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 216 return -EBUSY;
217
31eba5bc
FF		 218 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
219 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
220 check_dup = false;
221
3899ba90 222 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 223 if (ret)
224 return ret;
225
fc5f7577 226 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 227
228 if (ret == 0)
fc5f7577 229 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 230
231 return ret;
232}
233
0d143fe1
JB		 234static inline int identical_mac_addr_allowed(int type1, int type2)
235{
236 return type1 == NL80211_IFTYPE_MONITOR ||
237 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 238 type1 == NL80211_IFTYPE_P2P_DEVICE ||
239 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 240 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
241 (type1 == NL80211_IFTYPE_WDS &&
242 (type2 == NL80211_IFTYPE_WDS ||
243 type2 == NL80211_IFTYPE_AP)) ||
244 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
245 (type1 == NL80211_IFTYPE_AP_VLAN &&
246 (type2 == NL80211_IFTYPE_AP ||
247 type2 == NL80211_IFTYPE_AP_VLAN));
248}
249
87490f6d
JB		 250static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
251 enum nl80211_iftype iftype)
0d143fe1 252{
b4a4bf5d 253 struct ieee80211_local *local = sdata->local;
87490f6d 254 struct ieee80211_sub_if_data *nsdata;
b6a55015 255 int ret;
0d143fe1 256
87490f6d 257 ASSERT_RTNL();
0d143fe1
JB		 258
259 /* we hold the RTNL here so can safely walk the list */
260 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 261 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 262 /*
263 * Only OCB and monitor mode may coexist
264 */
265 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
266 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
267 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
268 nsdata->vif.type == NL80211_IFTYPE_OCB))
269 return -EBUSY;
270
0d143fe1
JB		 271 /*
272 * Allow only a single IBSS interface to be up at any
273 * time. This is restricted because beacon distribution
274 * cannot work properly if both are in the same IBSS.
275 *
276 * To remove this restriction we'd have to disallow them
277 * from setting the same SSID on different IBSS interfaces
278 * belonging to the same hardware. Then, however, we're
279 * faced with having to adopt two different TSF timers...
280 */
87490f6d 281 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 282 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
283 return -EBUSY;
73da7d5b
SW		 284 /*
285 * will not add another interface while any channel
286 * switch is active.
287 */
288 if (nsdata->vif.csa_active)
289 return -EBUSY;
0d143fe1
JB		 290
291 /*
292 * The remaining checks are only performed for interfaces
293 * with the same MAC address.
294 */
371a255e
JB		 295 if (!ether_addr_equal(sdata->vif.addr,
296 nsdata->vif.addr))
0d143fe1
JB		 297 continue;
298
299 /*
300 * check whether it may have the same address
301 */
87490f6d 302 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 303 nsdata->vif.type))
304 return -ENOTUNIQ;
305
306 /*
307 * can only add VLANs to enabled APs
308 */
87490f6d 309 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 310 nsdata->vif.type == NL80211_IFTYPE_AP)
311 sdata->bss = &nsdata->u.ap;
312 }
313 }
314
b6a55015
LC		 315 mutex_lock(&local->chanctx_mtx);
316 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
317 mutex_unlock(&local->chanctx_mtx);
318 return ret;
87490f6d
JB		 319}
320
a9865538
JB		 321static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
322 enum nl80211_iftype iftype)
3a25a8c8
JB		 323{
324 int n_queues = sdata->local->hw.queues;
325 int i;
326
a9865538 327 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 328 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
329 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
330 IEEE80211_INVAL_HW_QUEUE))
331 return -EINVAL;
332 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
333 n_queues))
334 return -EINVAL;
335 }
3a25a8c8
JB		 336 }
337
a9865538
JB		 338 if ((iftype != NL80211_IFTYPE_AP &&
339 iftype != NL80211_IFTYPE_P2P_GO &&
340 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 341 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 342 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
343 return 0;
344 }
345
346 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
347 return -EINVAL;
348
349 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
350 return -EINVAL;
351
352 return 0;
353}
354
85416a4f
CL		 355void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
356 const int offset)
357{
358 struct ieee80211_local *local = sdata->local;
359 u32 flags = sdata->u.mntr_flags;
360
361#define ADJUST(_f, _s) do { \
362 if (flags & MONITOR_FLAG_##_f) \
363 local->fif_##_s += offset; \
364 } while (0)
365
366 ADJUST(FCSFAIL, fcsfail);
367 ADJUST(PLCPFAIL, plcpfail);
368 ADJUST(CONTROL, control);
369 ADJUST(CONTROL, pspoll);
370 ADJUST(OTHER_BSS, other_bss);
371
372#undef ADJUST
373}
374
3a25a8c8
JB		 375static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
376{
377 struct ieee80211_local *local = sdata->local;
378 int i;
379
380 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
381 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
382 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 383 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 384 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 385 else
386 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 387 }
388 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
389}
390
3c3e21e7 391int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 392{
393 struct ieee80211_sub_if_data *sdata;
8b305780 394 int ret;
4b6f1dd6
JB		 395
396 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
397 return 0;
398
8b305780 399 ASSERT_RTNL();
685fb72b 400
4b6f1dd6 401 if (local->monitor_sdata)
8b305780 402 return 0;
4b6f1dd6
JB		 403
404 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 405 if (!sdata)
406 return -ENOMEM;
4b6f1dd6
JB		 407
408 /* set up data */
409 sdata->local = local;
410 sdata->vif.type = NL80211_IFTYPE_MONITOR;
411 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
412 wiphy_name(local->hw.wiphy));
34171dc0 413 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 414
2475b1cc
MS		 415 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
416
3a25a8c8
JB		 417 ieee80211_set_default_queues(sdata);
418
4b6f1dd6
JB		 419 ret = drv_add_interface(local, sdata);
420 if (WARN_ON(ret)) {
421 /* ok .. stupid driver, it asked for this! */
422 kfree(sdata);
8b305780 423 return ret;
4b6f1dd6
JB		 424 }
425
a9865538 426 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 427 if (ret) {
428 kfree(sdata);
8b305780 429 return ret;
3a25a8c8
JB		 430 }
431
fab57a6c
JB		 432 mutex_lock(&local->iflist_mtx);
433 rcu_assign_pointer(local->monitor_sdata, sdata);
434 mutex_unlock(&local->iflist_mtx);
435
34a3740d 436 mutex_lock(&local->mtx);
4bf88530 437 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 438 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 439 mutex_unlock(&local->mtx);
55de908a 440 if (ret) {
fab57a6c 441 mutex_lock(&local->iflist_mtx);
0c2bef46 442 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 443 mutex_unlock(&local->iflist_mtx);
444 synchronize_net();
55de908a
JB		 445 drv_remove_interface(local, sdata);
446 kfree(sdata);
8b305780 447 return ret;
55de908a
JB		 448 }
449
8b305780 450 return 0;
4b6f1dd6
JB		 451}
452
3c3e21e7 453void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 454{
455 struct ieee80211_sub_if_data *sdata;
456
457 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
458 return;
459
8b305780
JB		 460 ASSERT_RTNL();
461
685fb72b 462 mutex_lock(&local->iflist_mtx);
4b6f1dd6 463
685fb72b
JB		 464 sdata = rcu_dereference_protected(local->monitor_sdata,
465 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 466 if (!sdata) {
467 mutex_unlock(&local->iflist_mtx);
468 return;
469 }
4b6f1dd6 470
0c2bef46 471 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 472 mutex_unlock(&local->iflist_mtx);
473
4b6f1dd6
JB		 474 synchronize_net();
475
34a3740d 476 mutex_lock(&local->mtx);
55de908a 477 ieee80211_vif_release_channel(sdata);
34a3740d 478 mutex_unlock(&local->mtx);
55de908a 479
4b6f1dd6
JB		 480 drv_remove_interface(local, sdata);
481
482 kfree(sdata);
483}
484
34d4bc4d
JB		 485/*
486 * NOTE: Be very careful when changing this function, it must NOT return
487 * an error on interface type changes that have been pre-checked, so most
488 * checks should be in ieee80211_check_concurrent_iface.
489 */
f142c6b9 490int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 491{
f142c6b9
JB		 492 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
493 struct net_device *dev = wdev->netdev;
87490f6d
JB		 494 struct ieee80211_local *local = sdata->local;
495 struct sta_info *sta;
496 u32 changed = 0;
497 int res;
498 u32 hw_reconf_flags = 0;
499
0d143fe1
JB		 500 switch (sdata->vif.type) {
501 case NL80211_IFTYPE_WDS:
502 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
503 return -ENOLINK;
504 break;
665c93a9
JB		 505 case NL80211_IFTYPE_AP_VLAN: {
506 struct ieee80211_sub_if_data *master;
507
0d143fe1
JB		 508 if (!sdata->bss)
509 return -ENOLINK;
665c93a9 510
4e141dad 511 mutex_lock(&local->mtx);
0d143fe1 512 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 513 mutex_unlock(&local->mtx);
665c93a9
JB		 514
515 master = container_of(sdata->bss,
516 struct ieee80211_sub_if_data, u.ap);
517 sdata->control_port_protocol =
518 master->control_port_protocol;
519 sdata->control_port_no_encrypt =
520 master->control_port_no_encrypt;
1351c5d3
JB		 521 sdata->vif.cab_queue = master->vif.cab_queue;
522 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
523 sizeof(sdata->vif.hw_queue));
2967e031 524 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
0d143fe1 525 break;
665c93a9 526 }
0d143fe1
JB		 527 case NL80211_IFTYPE_AP:
528 sdata->bss = &sdata->u.ap;
529 break;
530 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 531 case NL80211_IFTYPE_STATION:
532 case NL80211_IFTYPE_MONITOR:
533 case NL80211_IFTYPE_ADHOC:
f142c6b9 534 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 535 case NL80211_IFTYPE_OCB:
0d143fe1
JB		 536 /* no special treatment */
537 break;
538 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 539 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 540 case NL80211_IFTYPE_P2P_CLIENT:
541 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 542 /* cannot happen */
543 WARN_ON(1);
544 break;
545 }
546
547 if (local->open_count == 0) {
24487981 548 res = drv_start(local);
0d143fe1
JB		 549 if (res)
550 goto err_del_bss;
e8975581
JB		 551 /* we're brought up, everything changes */
552 hw_reconf_flags = ~0;
1f87f7d3 553 ieee80211_led_radio(local, true);
67408c8c
JB		 554 ieee80211_mod_tpt_led_trig(local,
555 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 556 }
557
558 /*
bf533e0b
JB		 559 * Copy the hopefully now-present MAC address to
560 * this interface, if it has the special null one.
0d143fe1 561 */
f142c6b9 562 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 563 memcpy(dev->dev_addr,
564 local->hw.wiphy->perm_addr,
565 ETH_ALEN);
566 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
567
568 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 569 res = -EADDRNOTAVAIL;
570 goto err_stop;
0adc23f5 571 }
0d143fe1
JB		 572 }
573
0d143fe1
JB		 574 switch (sdata->vif.type) {
575 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 576 /* no need to tell driver, but set carrier and chanctx */
577 if (rtnl_dereference(sdata->bss->beacon)) {
578 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 579 netif_carrier_on(dev);
4d76d21b 580 } else {
3edaf3e6 581 netif_carrier_off(dev);
4d76d21b 582 }
0d143fe1
JB		 583 break;
584 case NL80211_IFTYPE_MONITOR:
585 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
586 local->cooked_mntrs++;
587 break;
588 }
589
31eba5bc
FF		 590 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
591 res = drv_add_interface(local, sdata);
592 if (res)
593 goto err_stop;
594 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 595 res = ieee80211_add_virtual_monitor(local);
596 if (res)
597 goto err_stop;
598 }
599
0d143fe1
JB		 600 /* must be before the call to ieee80211_configure_filter */
601 local->monitors++;
e8975581 602 if (local->monitors == 1) {
0869aea0
JB		 603 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
604 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 605 }
0d143fe1 606
85416a4f 607 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 608 ieee80211_configure_filter(local);
801d929c
FF		 609 mutex_lock(&local->mtx);
610 ieee80211_recalc_idle(local);
611 mutex_unlock(&local->mtx);
53e9b1de
DG		 612
613 netif_carrier_on(dev);
0d143fe1 614 break;
0d143fe1 615 default:
34d4bc4d 616 if (coming_up) {
075e0847
JB		 617 ieee80211_del_virtual_monitor(local);
618
7b7eab6f 619 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 620 if (res)
621 goto err_stop;
a9865538
JB		 622 res = ieee80211_check_queues(sdata,
623 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 624 if (res)
625 goto err_del_interface;
34d4bc4d 626 }
0d143fe1 627
29cbe68c 628 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 629 local->fif_pspoll++;
7be5086d 630 local->fif_probe_req++;
e3b90ca2 631
e3b90ca2 632 ieee80211_configure_filter(local);
7be5086d
JB		 633 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
634 local->fif_probe_req++;
a3c9aa51 635 }
e3b90ca2 636
f142c6b9
JB		 637 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
638 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 639 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 640
c405c629
JB		 641 switch (sdata->vif.type) {
642 case NL80211_IFTYPE_STATION:
643 case NL80211_IFTYPE_ADHOC:
644 case NL80211_IFTYPE_AP:
645 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 646 case NL80211_IFTYPE_OCB:
0d143fe1 647 netif_carrier_off(dev);
c405c629 648 break;
1411af15 649 case NL80211_IFTYPE_WDS:
f142c6b9 650 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 651 break;
c405c629 652 default:
a2310824
JB		 653 /* not reached */
654 WARN_ON(1);
c405c629 655 }
59034591
EP		 656
657 /*
658 * set default queue parameters so drivers don't
659 * need to initialise the hardware if the hardware
660 * doesn't start up with sane defaults
661 */
3abead59 662 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 663 }
664
2d2080c3
JB		 665 set_bit(SDATA_STATE_RUNNING, &sdata->state);
666
0d143fe1
JB		 667 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
668 /* Create STA entry for the WDS peer */
669 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
670 GFP_KERNEL);
671 if (!sta) {
672 res = -ENOMEM;
673 goto err_del_interface;
674 }
675
83d5cc01
JB		 676 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
677 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
678 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 679
680 res = sta_info_insert(sta);
681 if (res) {
682 /* STA has been freed */
683 goto err_del_interface;
684 }
1be7fe8d
BJ		 685
686 rate_control_rate_init(sta);
1411af15 687 netif_carrier_on(dev);
f142c6b9
JB		 688 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
689 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 690 }
691
0d143fe1
JB		 692 /*
693 * set_multicast_list will be invoked by the networking core
694 * which will check whether any increments here were done in
695 * error and sync them down to the hardware as filter flags.
696 */
697 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
698 atomic_inc(&local->iff_allmultis);
699
700 if (sdata->flags & IEEE80211_SDATA_PROMISC)
701 atomic_inc(&local->iff_promiscs);
702
34d4bc4d
JB		 703 if (coming_up)
704 local->open_count++;
705
59034591 706 if (hw_reconf_flags)
e8975581 707 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 708
10f644a4 709 ieee80211_recalc_ps(local, -1);
965bedad 710
2b436312
JB		 711 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
712 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
713 /* XXX: for AP_VLAN, actually track AP queues */
714 netif_tx_start_all_queues(dev);
715 } else if (dev) {
2b730daa
JB		 716 unsigned long flags;
717 int n_acs = IEEE80211_NUM_ACS;
718 int ac;
719
720 if (local->hw.queues < IEEE80211_NUM_ACS)
721 n_acs = 1;
722
723 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
724 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
725 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
726 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
727 for (ac = 0; ac < n_acs; ac++) {
728 int ac_queue = sdata->vif.hw_queue[ac];
729
730 if (local->queue_stop_reasons[ac_queue] == 0 &&
731 skb_queue_empty(&local->pending[ac_queue]))
732 netif_start_subqueue(dev, ac);
733 }
734 }
735 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
736 }
0d143fe1
JB		 737
738 return 0;
739 err_del_interface:
7b7eab6f 740 drv_remove_interface(local, sdata);
0d143fe1 741 err_stop:
24487981
JB		 742 if (!local->open_count)
743 drv_stop(local);
0d143fe1
JB		 744 err_del_bss:
745 sdata->bss = NULL;
4e141dad
MK		 746 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
747 mutex_lock(&local->mtx);
0d143fe1 748 list_del(&sdata->u.vlan.list);
4e141dad
MK		 749 mutex_unlock(&local->mtx);
750 }
4d6c36fa 751 /* might already be clear but that doesn't matter */
2d2080c3 752 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 753 return res;
754}
755
34d4bc4d 756static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 757{
758 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 759 int err;
760
761 /* fail early if user set an invalid address */
2fcf2824 762 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 763 return -EADDRNOTAVAIL;
764
765 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
766 if (err)
767 return err;
768
f142c6b9 769 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 770}
771
772static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
773 bool going_down)
774{
0d143fe1 775 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 776 unsigned long flags;
777 struct sk_buff *skb, *tmp;
e8975581 778 u32 hw_reconf_flags = 0;
09f4114e 779 int i, flushed;
397a7a24 780 struct ps_data *ps;
d2859df5 781 struct cfg80211_chan_def chandef;
46238845 782 bool cancel_scan;
0d143fe1 783
c29acf20
RM		 784 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
785
46238845
JB		 786 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
787 if (cancel_scan)
352ffad6
BC		 788 ieee80211_scan_cancel(local);
789
0d143fe1
JB		 790 /*
791 * Stop TX on this interface first.
792 */
f142c6b9
JB		 793 if (sdata->dev)
794 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 795
c8f994ee 796 ieee80211_roc_purge(local, sdata);
af6b6374 797
8ffcc704
EG		 798 switch (sdata->vif.type) {
799 case NL80211_IFTYPE_STATION:
572078be 800 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 801 break;
802 case NL80211_IFTYPE_ADHOC:
cd7760e6 803 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 804 break;
805 case NL80211_IFTYPE_AP:
806 cancel_work_sync(&sdata->u.ap.request_smps_work);
807 break;
808 default:
809 break;
810 }
cd7760e6 811
0d143fe1
JB		 812 /*
813 * Remove all stations associated with this interface.
814 *
815 * This must be done before calling ops->remove_interface()
816 * because otherwise we can later invoke ops->sta_notify()
817 * whenever the STAs are removed, and that invalidates driver
818 * assumptions about always getting a vif pointer that is valid
819 * (because if we remove a STA after ops->remove_interface()
820 * the driver will have removed the vif info already!)
821 *
09f4114e
JB		 822 * This is relevant only in WDS mode, in all other modes we've
823 * already removed all stations when disconnecting or similar,
824 * so warn otherwise.
0d143fe1 825 */
d34ba216 826 flushed = sta_info_flush(sdata);
09f4114e
JB		 827 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
828 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 829
afdc7c18 830 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 831 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
832 atomic_dec(&local->iff_allmultis);
833
834 if (sdata->flags & IEEE80211_SDATA_PROMISC)
835 atomic_dec(&local->iff_promiscs);
836
7be5086d 837 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 838 local->fif_pspoll--;
7be5086d
JB		 839 local->fif_probe_req--;
840 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
841 local->fif_probe_req--;
842 }
e3b90ca2 843
f142c6b9
JB		 844 if (sdata->dev) {
845 netif_addr_lock_bh(sdata->dev);
846 spin_lock_bh(&local->filter_lock);
847 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
848 sdata->dev->addr_len);
849 spin_unlock_bh(&local->filter_lock);
850 netif_addr_unlock_bh(sdata->dev);
f142c6b9 851 }
3ac64bee 852
7cbf0ba5
VN		 853 del_timer_sync(&local->dynamic_ps_timer);
854 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 855
04ecd257 856 cancel_work_sync(&sdata->recalc_smps);
dbd72850 857 sdata_lock(sdata);
59af6928 858 mutex_lock(&local->mtx);
73da7d5b 859 sdata->vif.csa_active = false;
0c21e632
LC		 860 if (sdata->vif.type == NL80211_IFTYPE_STATION)
861 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 862 if (sdata->csa_block_tx) {
863 ieee80211_wake_vif_queues(local, sdata,
864 IEEE80211_QUEUE_STOP_REASON_CSA);
865 sdata->csa_block_tx = false;
866 }
59af6928 867 mutex_unlock(&local->mtx);
dbd72850 868 sdata_unlock(sdata);
59af6928 869
73da7d5b 870 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 871
164eb02d
SW		 872 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
873
874 if (sdata->wdev.cac_started) {
d2859df5 875 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 876 WARN_ON(local->suspended);
34a3740d 877 mutex_lock(&local->mtx);
164eb02d 878 ieee80211_vif_release_channel(sdata);
34a3740d 879 mutex_unlock(&local->mtx);
d2859df5
JD		 880 cfg80211_cac_event(sdata->dev, &chandef,
881 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 882 GFP_KERNEL);
883 }
884
0d143fe1
JB		 885 /* APs need special treatment */
886 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 887 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 888
889 /* down all dependent devices, that is VLANs */
57c9fff3 890 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 891 u.vlan.list)
892 dev_close(vlan->dev);
893 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 894 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
895 /* remove all packets in parent bc_buf pointing to this dev */
896 ps = &sdata->bss->ps;
897
898 spin_lock_irqsave(&ps->bc_buf.lock, flags);
899 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
900 if (skb->dev == sdata->dev) {
901 __skb_unlink(skb, &ps->bc_buf);
902 local->total_ps_buffered--;
903 ieee80211_free_txskb(&local->hw, skb);
904 }
905 }
906 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 907 }
908
34d4bc4d
JB		 909 if (going_down)
910 local->open_count--;
0d143fe1
JB		 911
912 switch (sdata->vif.type) {
913 case NL80211_IFTYPE_AP_VLAN:
4e141dad 914 mutex_lock(&local->mtx);
0d143fe1 915 list_del(&sdata->u.vlan.list);
4e141dad 916 mutex_unlock(&local->mtx);
0c2bef46 917 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 918 /* see comment in the default case below */
919 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 920 /* no need to tell driver */
921 break;
922 case NL80211_IFTYPE_MONITOR:
923 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
924 local->cooked_mntrs--;
925 break;
926 }
927
928 local->monitors--;
e8975581 929 if (local->monitors == 0) {
0869aea0
JB		 930 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
931 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 932 }
0d143fe1 933
85416a4f 934 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 935 break;
f142c6b9
JB		 936 case NL80211_IFTYPE_P2P_DEVICE:
937 /* relies on synchronize_rcu() below */
0c2bef46 938 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 939 /* fall through */
0d143fe1 940 default:
0b7dff4f 941 cancel_work_sync(&sdata->work);
35f20c14
JB		 942 /*
943 * When we get here, the interface is marked down.
7907c7d3 944 * Free the remaining keys, if there are any
10b68487
FF		 945 * (which can happen in AP mode if userspace sets
946 * keys before the interface is operating, and maybe
947 * also in WDS mode)
75de9113 948 *
7907c7d3
JB		 949 * Force the key freeing to always synchronize_net()
950 * to wait for the RX path in case it is using this
10b68487 951 * interface enqueuing frames at this very time on
75de9113 952 * another CPU.
35f20c14 953 */
7907c7d3 954 ieee80211_free_keys(sdata, true);
1861b845 955 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 956 }
957
958 sdata->bss = NULL;
959
5061b0c2
JB		 960 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
961 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
962 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
963 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
964 if (info->control.vif == &sdata->vif) {
965 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 966 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 967 }
968 }
969 }
970 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 971
b2c0958b
JB		 972 if (local->open_count == 0)
973 ieee80211_clear_tx_pending(local);
974
975 /*
976 * If the interface goes down while suspended, presumably because
977 * the device was unplugged and that happens before our resume,
978 * then the driver is already unconfigured and the remainder of
979 * this function isn't needed.
980 * XXX: what about WoWLAN? If the device has software state, e.g.
981 * memory allocated, it might expect teardown commands from
982 * mac80211 here?
983 */
984 if (local->suspended) {
985 WARN_ON(local->wowlan);
986 WARN_ON(rtnl_dereference(local->monitor_sdata));
987 return;
988 }
989
990 switch (sdata->vif.type) {
991 case NL80211_IFTYPE_AP_VLAN:
992 break;
993 case NL80211_IFTYPE_MONITOR:
994 if (local->monitors == 0)
995 ieee80211_del_virtual_monitor(local);
996
997 mutex_lock(&local->mtx);
998 ieee80211_recalc_idle(local);
999 mutex_unlock(&local->mtx);
31eba5bc
FF		 1000
1001 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1002 break;
1003
1004 /* fall through */
b2c0958b
JB		 1005 default:
1006 if (going_down)
1007 drv_remove_interface(local, sdata);
1008 }
1009
1010 ieee80211_recalc_ps(local, -1);
1011
46238845
JB		 1012 if (cancel_scan)
1013 flush_delayed_work(&local->scan_work);
1014
b2c0958b
JB		 1015 if (local->open_count == 0) {
1016 ieee80211_stop_device(local);
1017
1018 /* no reconfiguring after stop! */
1019 return;
1020 }
1021
1022 /* do after stop to avoid reconfiguring when we stop anyway */
1023 ieee80211_configure_filter(local);
1024 ieee80211_hw_config(local, hw_reconf_flags);
1025
1026 if (local->monitors == local->open_count)
075e0847 1027 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1028}
1029
1030static int ieee80211_stop(struct net_device *dev)
1031{
1032 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1033
1034 ieee80211_do_stop(sdata, true);
5061b0c2 1035
0d143fe1
JB		 1036 return 0;
1037}
1038
1039static void ieee80211_set_multicast_list(struct net_device *dev)
1040{
0d143fe1 1041 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1042 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1043 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1044
1045 allmulti = !!(dev->flags & IFF_ALLMULTI);
1046 promisc = !!(dev->flags & IFF_PROMISC);
1047 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1048 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1049
1050 if (allmulti != sdata_allmulti) {
1051 if (dev->flags & IFF_ALLMULTI)
1052 atomic_inc(&local->iff_allmultis);
1053 else
1054 atomic_dec(&local->iff_allmultis);
1055 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1056 }
1057
1058 if (promisc != sdata_promisc) {
1059 if (dev->flags & IFF_PROMISC)
1060 atomic_inc(&local->iff_promiscs);
1061 else
1062 atomic_dec(&local->iff_promiscs);
1063 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1064 }
3b8d81e0 1065 spin_lock_bh(&local->filter_lock);
22bedad3 1066 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1067 spin_unlock_bh(&local->filter_lock);
3ac64bee 1068 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1069}
1070
75636525
JB		 1071/*
1072 * Called when the netdev is removed or, by the code below, before
1073 * the interface type changes.
1074 */
f142c6b9 1075static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1076{
1077 int i;
1078
75636525 1079 /* free extra data */
7907c7d3 1080 ieee80211_free_keys(sdata, false);
75636525 1081
aee14ceb
JM		 1082 ieee80211_debugfs_remove_netdev(sdata);
1083
f0706e82 1084 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1085 __skb_queue_purge(&sdata->fragments[i].skb_list);
1086 sdata->fragment_next = 0;
11a843b7 1087
b9dcf712
JB		 1088 if (ieee80211_vif_is_mesh(&sdata->vif))
1089 mesh_rmc_free(sdata);
f0706e82
JB		 1090}
1091
f142c6b9
JB		 1092static void ieee80211_uninit(struct net_device *dev)
1093{
1094 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1095}
1096
cf0277e7 1097static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1098 struct sk_buff *skb,
99932d4f
DB		 1099 void *accel_priv,
1100 select_queue_fallback_t fallback)
cf0277e7
JB		 1101{
1102 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1103}
1104
587e729e
JB		 1105static const struct net_device_ops ieee80211_dataif_ops = {
1106 .ndo_open = ieee80211_open,
1107 .ndo_stop = ieee80211_stop,
f142c6b9 1108 .ndo_uninit = ieee80211_uninit,
587e729e 1109 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1110 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1111 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1112 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1113 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1114};
1115
cf0277e7 1116static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1117 struct sk_buff *skb,
99932d4f
DB		 1118 void *accel_priv,
1119 select_queue_fallback_t fallback)
cf0277e7
JB		 1120{
1121 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1122 struct ieee80211_local *local = sdata->local;
1123 struct ieee80211_hdr *hdr;
1124 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1125
32c5057b 1126 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1127 return 0;
1128
1129 if (skb->len < 4 ||
b49bb574 1130 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1131 return 0; /* doesn't matter, frame will be dropped */
1132
b49bb574 1133 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1134
00e96dec 1135 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1136}
1137
587e729e
JB		 1138static const struct net_device_ops ieee80211_monitorif_ops = {
1139 .ndo_open = ieee80211_open,
1140 .ndo_stop = ieee80211_stop,
f142c6b9 1141 .ndo_uninit = ieee80211_uninit,
587e729e 1142 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1143 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1144 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1145 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1146 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1147};
1148
1149static void ieee80211_if_setup(struct net_device *dev)
1150{
1151 ether_setup(dev);
550fd08c 1152 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1153 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1154 dev->destructor = free_netdev;
1155}
1156
1fa57d01
JB		 1157static void ieee80211_iface_work(struct work_struct *work)
1158{
1159 struct ieee80211_sub_if_data *sdata =
1160 container_of(work, struct ieee80211_sub_if_data, work);
1161 struct ieee80211_local *local = sdata->local;
1162 struct sk_buff *skb;
344eec67 1163 struct sta_info *sta;
c1475ca9 1164 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1165 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1166
1167 if (!ieee80211_sdata_running(sdata))
1168 return;
1169
1170 if (local->scanning)
1171 return;
1172
4afaff17 1173 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1174 return;
1175
1176 /* first process frames */
1177 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1178 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1179
c1475ca9
JB		 1180 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1181 ra_tid = (void *)&skb->cb;
1182 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1183 ra_tid->tid);
1184 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1185 ra_tid = (void *)&skb->cb;
1186 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1187 ra_tid->tid);
08cf42e8
MK		 1188 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1189 rx_agg = (void *)&skb->cb;
1190 mutex_lock(&local->sta_mtx);
1191 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1192 if (sta)
08cf42e8 1193 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1194 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1195 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1196 false, true);
08cf42e8
MK		 1197 mutex_unlock(&local->sta_mtx);
1198 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1199 rx_agg = (void *)&skb->cb;
1200 mutex_lock(&local->sta_mtx);
1201 sta = sta_info_get_bss(sdata, rx_agg->addr);
1202 if (sta)
1203 __ieee80211_stop_rx_ba_session(sta,
1204 rx_agg->tid,
1205 WLAN_BACK_RECIPIENT, 0,
1206 false);
1207 mutex_unlock(&local->sta_mtx);
8a4d32f3
AN		 1208 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_TDLS_CHSW) {
1209 ieee80211_process_tdls_channel_switch(sdata, skb);
c1475ca9
JB		 1210 } else if (ieee80211_is_action(mgmt->frame_control) &&
1211 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1212 int len = skb->len;
bed7ee6e 1213
a93e3644 1214 mutex_lock(&local->sta_mtx);
875ae5f6 1215 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1216 if (sta) {
1217 switch (mgmt->u.action.u.addba_req.action_code) {
1218 case WLAN_ACTION_ADDBA_REQ:
1219 ieee80211_process_addba_request(
1220 local, sta, mgmt, len);
1221 break;
1222 case WLAN_ACTION_ADDBA_RESP:
1223 ieee80211_process_addba_resp(local, sta,
1224 mgmt, len);
1225 break;
1226 case WLAN_ACTION_DELBA:
1227 ieee80211_process_delba(sdata, sta,
1228 mgmt, len);
1229 break;
1230 default:
1231 WARN_ON(1);
1232 break;
1233 }
1234 }
a93e3644 1235 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1236 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1237 struct ieee80211_hdr *hdr = (void *)mgmt;
1238 /*
1239 * So the frame isn't mgmt, but frame_control
1240 * is at the right place anyway, of course, so
1241 * the if statement is correct.
1242 *
1243 * Warn if we have other data frame types here,
1244 * they must not get here.
1245 */
1246 WARN_ON(hdr->frame_control &
1247 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1248 WARN_ON(!(hdr->seq_ctrl &
1249 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1250 /*
1251 * This was a fragment of a frame, received while
1252 * a block-ack session was active. That cannot be
1253 * right, so terminate the session.
1254 */
a93e3644 1255 mutex_lock(&local->sta_mtx);
875ae5f6 1256 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1257 if (sta) {
1258 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1259 IEEE80211_QOS_CTL_TID_MASK;
1260
1261 __ieee80211_stop_rx_ba_session(
1262 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1263 WLAN_REASON_QSTA_REQUIRE_SETUP,
1264 true);
344eec67 1265 }
a93e3644 1266 mutex_unlock(&local->sta_mtx);
bed7ee6e 1267 } else switch (sdata->vif.type) {
1fa57d01
JB		 1268 case NL80211_IFTYPE_STATION:
1269 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1270 break;
1271 case NL80211_IFTYPE_ADHOC:
1272 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1273 break;
1274 case NL80211_IFTYPE_MESH_POINT:
1275 if (!ieee80211_vif_is_mesh(&sdata->vif))
1276 break;
1277 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1278 break;
1279 default:
1280 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1281 break;
1282 }
36b3a628
JB		 1283
1284 kfree_skb(skb);
1fa57d01
JB		 1285 }
1286
1287 /* then other type-dependent work */
1288 switch (sdata->vif.type) {
1289 case NL80211_IFTYPE_STATION:
1290 ieee80211_sta_work(sdata);
1291 break;
1292 case NL80211_IFTYPE_ADHOC:
1293 ieee80211_ibss_work(sdata);
1294 break;
1295 case NL80211_IFTYPE_MESH_POINT:
1296 if (!ieee80211_vif_is_mesh(&sdata->vif))
1297 break;
1298 ieee80211_mesh_work(sdata);
1299 break;
239281f8
RL		 1300 case NL80211_IFTYPE_OCB:
1301 ieee80211_ocb_work(sdata);
1302 break;
1fa57d01
JB		 1303 default:
1304 break;
1305 }
1306}
1307
04ecd257
JB		 1308static void ieee80211_recalc_smps_work(struct work_struct *work)
1309{
1310 struct ieee80211_sub_if_data *sdata =
1311 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1312
1313 ieee80211_recalc_smps(sdata);
1314}
1fa57d01 1315
75636525
JB		 1316/*
1317 * Helper function to initialise an interface to a specific type.
1318 */
1319static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1320 enum nl80211_iftype type)
f0706e82 1321{
239281f8
RL		 1322 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1323 0xff, 0xff, 0xff};
1324
75636525
JB		 1325 /* clear type-dependent union */
1326 memset(&sdata->u, 0, sizeof(sdata->u));
1327
1328 /* and set some type-dependent values */
1329 sdata->vif.type = type;
2ca27bcf 1330 sdata->vif.p2p = false;
60719ffd 1331 sdata->wdev.iftype = type;
75636525 1332
a621fa4d
JB		 1333 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1334 sdata->control_port_no_encrypt = false;
2475b1cc 1335 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1336 sdata->vif.bss_conf.idle = true;
a621fa4d 1337
b53be792
SW		 1338 sdata->noack_map = 0;
1339
f142c6b9
JB		 1340 /* only monitor/p2p-device differ */
1341 if (sdata->dev) {
1342 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1343 sdata->dev->type = ARPHRD_ETHER;
1344 }
75636525 1345
35f20c14 1346 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1347 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1348 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1349 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1350 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1351 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1352
75636525 1353 switch (type) {
2ca27bcf
JB		 1354 case NL80211_IFTYPE_P2P_GO:
1355 type = NL80211_IFTYPE_AP;
1356 sdata->vif.type = type;
1357 sdata->vif.p2p = true;
1358 /* fall through */
05c914fe 1359 case NL80211_IFTYPE_AP:
d012a605 1360 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1361 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1362 INIT_WORK(&sdata->u.ap.request_smps_work,
1363 ieee80211_request_smps_ap_work);
ad2d223a 1364 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1365 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1366 break;
2ca27bcf
JB		 1367 case NL80211_IFTYPE_P2P_CLIENT:
1368 type = NL80211_IFTYPE_STATION;
1369 sdata->vif.type = type;
1370 sdata->vif.p2p = true;
1371 /* fall through */
05c914fe 1372 case NL80211_IFTYPE_STATION:
ad2d223a 1373 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1374 ieee80211_sta_setup_sdata(sdata);
472dbc45 1375 break;
6e0bd6c3 1376 case NL80211_IFTYPE_OCB:
239281f8
RL		 1377 sdata->vif.bss_conf.bssid = bssid_wildcard;
1378 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1379 break;
46900298 1380 case NL80211_IFTYPE_ADHOC:
ad2d223a 1381 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1382 ieee80211_ibss_setup_sdata(sdata);
1383 break;
05c914fe 1384 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1385 if (ieee80211_vif_is_mesh(&sdata->vif))
1386 ieee80211_mesh_init_sdata(sdata);
1387 break;
05c914fe 1388 case NL80211_IFTYPE_MONITOR:
75636525 1389 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1390 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1391 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1392 MONITOR_FLAG_OTHER_BSS;
1393 break;
05c914fe 1394 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1395 sdata->vif.bss_conf.bssid = NULL;
1396 break;
05c914fe 1397 case NL80211_IFTYPE_AP_VLAN:
98104fde 1398 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1399 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1400 break;
05c914fe 1401 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1402 case NUM_NL80211_IFTYPES:
75636525
JB		 1403 BUG();
1404 break;
1405 }
1406
1407 ieee80211_debugfs_add_netdev(sdata);
1408}
1409
34d4bc4d
JB		 1410static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1411 enum nl80211_iftype type)
1412{
1413 struct ieee80211_local *local = sdata->local;
1414 int ret, err;
2ca27bcf
JB		 1415 enum nl80211_iftype internal_type = type;
1416 bool p2p = false;
34d4bc4d
JB		 1417
1418 ASSERT_RTNL();
1419
1420 if (!local->ops->change_interface)
1421 return -EBUSY;
1422
1423 switch (sdata->vif.type) {
1424 case NL80211_IFTYPE_AP:
1425 case NL80211_IFTYPE_STATION:
1426 case NL80211_IFTYPE_ADHOC:
239281f8 1427 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1428 /*
1429 * Could maybe also all others here?
1430 * Just not sure how that interacts
1431 * with the RX/config path e.g. for
1432 * mesh.
1433 */
1434 break;
1435 default:
1436 return -EBUSY;
1437 }
1438
1439 switch (type) {
1440 case NL80211_IFTYPE_AP:
1441 case NL80211_IFTYPE_STATION:
1442 case NL80211_IFTYPE_ADHOC:
239281f8 1443 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1444 /*
1445 * Could probably support everything
1446 * but WDS here (WDS do_open can fail
1447 * under memory pressure, which this
1448 * code isn't prepared to handle).
1449 */
1450 break;
2ca27bcf
JB		 1451 case NL80211_IFTYPE_P2P_CLIENT:
1452 p2p = true;
1453 internal_type = NL80211_IFTYPE_STATION;
1454 break;
1455 case NL80211_IFTYPE_P2P_GO:
1456 p2p = true;
1457 internal_type = NL80211_IFTYPE_AP;
1458 break;
34d4bc4d
JB		 1459 default:
1460 return -EBUSY;
1461 }
1462
2ca27bcf 1463 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1464 if (ret)
1465 return ret;
1466
1467 ieee80211_do_stop(sdata, false);
1468
f142c6b9 1469 ieee80211_teardown_sdata(sdata);
34d4bc4d 1470
2ca27bcf 1471 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1472 if (ret)
a9865538 1473 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1474
3a25a8c8
JB		 1475 /*
1476 * Ignore return value here, there's not much we can do since
1477 * the driver changed the interface type internally already.
1478 * The warnings will hopefully make driver authors fix it :-)
1479 */
a9865538 1480 ieee80211_check_queues(sdata, type);
3a25a8c8 1481
34d4bc4d
JB		 1482 ieee80211_setup_sdata(sdata, type);
1483
f142c6b9 1484 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1485 WARN(err, "type change: do_open returned %d", err);
1486
1487 return ret;
1488}
1489
f3947e2d 1490int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1491 enum nl80211_iftype type)
75636525 1492{
34d4bc4d
JB		 1493 int ret;
1494
f3947e2d
JB		 1495 ASSERT_RTNL();
1496
2ca27bcf 1497 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1498 return 0;
1499
34d4bc4d
JB		 1500 if (ieee80211_sdata_running(sdata)) {
1501 ret = ieee80211_runtime_change_iftype(sdata, type);
1502 if (ret)
1503 return ret;
1504 } else {
1505 /* Purge and reset type-dependent state. */
f142c6b9 1506 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1507 ieee80211_setup_sdata(sdata, type);
1508 }
75636525
JB		 1509
1510 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1511 if (type == NL80211_IFTYPE_STATION)
1512 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1513
1514 return 0;
f0706e82
JB		 1515}
1516
fa9029f8 1517static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1518 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1519{
1520 struct ieee80211_sub_if_data *sdata;
1521 u64 mask, start, addr, val, inc;
1522 u8 *m;
1523 u8 tmp_addr[ETH_ALEN];
1524 int i;
1525
1526 /* default ... something at least */
f142c6b9 1527 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1528
1529 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1530 local->hw.wiphy->n_addresses <= 1)
1531 return;
1532
fa9029f8
JB		 1533 mutex_lock(&local->iflist_mtx);
1534
1535 switch (type) {
1536 case NL80211_IFTYPE_MONITOR:
1537 /* doesn't matter */
1538 break;
1539 case NL80211_IFTYPE_WDS:
1540 case NL80211_IFTYPE_AP_VLAN:
1541 /* match up with an AP interface */
1542 list_for_each_entry(sdata, &local->interfaces, list) {
1543 if (sdata->vif.type != NL80211_IFTYPE_AP)
1544 continue;
f142c6b9 1545 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1546 break;
1547 }
1548 /* keep default if no AP interface present */
1549 break;
6d71117a
JB		 1550 case NL80211_IFTYPE_P2P_CLIENT:
1551 case NL80211_IFTYPE_P2P_GO:
1552 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1553 list_for_each_entry(sdata, &local->interfaces, list) {
1554 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1555 continue;
1556 if (!ieee80211_sdata_running(sdata))
1557 continue;
1558 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1559 goto out_unlock;
1560 }
1561 }
1562 /* otherwise fall through */
fa9029f8
JB		 1563 default:
1564 /* assign a new address if possible -- try n_addresses first */
1565 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1566 bool used = false;
1567
1568 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1569 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1570 sdata->vif.addr)) {
fa9029f8
JB		 1571 used = true;
1572 break;
1573 }
1574 }
1575
1576 if (!used) {
f142c6b9 1577 memcpy(perm_addr,
fa9029f8
JB		 1578 local->hw.wiphy->addresses[i].addr,
1579 ETH_ALEN);
1580 break;
1581 }
1582 }
1583
1584 /* try mask if available */
1585 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1586 break;
1587
1588 m = local->hw.wiphy->addr_mask;
1589 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1590 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1591 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1592
1593 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1594 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1595 pr_info("not contiguous\n");
fa9029f8
JB		 1596 break;
1597 }
1598
ac20976d
HS		 1599 /*
1600 * Pick address of existing interface in case user changed
1601 * MAC address manually, default to perm_addr.
1602 */
fa9029f8 1603 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1604 list_for_each_entry(sdata, &local->interfaces, list) {
1605 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1606 continue;
1607 m = sdata->vif.addr;
1608 break;
1609 }
fa9029f8
JB		 1610 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1611 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1612 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1613
1614 inc = 1ULL<<__ffs64(mask);
1615 val = (start & mask);
1616 addr = (start & ~mask) | (val & mask);
1617 do {
1618 bool used = false;
1619
1620 tmp_addr[5] = addr >> 0*8;
1621 tmp_addr[4] = addr >> 1*8;
1622 tmp_addr[3] = addr >> 2*8;
1623 tmp_addr[2] = addr >> 3*8;
1624 tmp_addr[1] = addr >> 4*8;
1625 tmp_addr[0] = addr >> 5*8;
1626
1627 val += inc;
1628
1629 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1630 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1631 used = true;
1632 break;
1633 }
1634 }
1635
1636 if (!used) {
f142c6b9 1637 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1638 break;
1639 }
1640 addr = (start & ~mask) | (val & mask);
1641 } while (addr != start);
1642
1643 break;
1644 }
1645
6d71117a 1646 out_unlock:
fa9029f8
JB		 1647 mutex_unlock(&local->iflist_mtx);
1648}
1649
3e122be0 1650int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1651 unsigned char name_assign_type,
84efbb84 1652 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1653 struct vif_params *params)
f0706e82 1654{
f142c6b9 1655 struct net_device *ndev = NULL;
f0706e82 1656 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1657 int ret, i;
ded81f6b 1658 int txqs = 1;
f0706e82
JB		 1659
1660 ASSERT_RTNL();
75636525 1661
f142c6b9
JB		 1662 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1663 struct wireless_dev *wdev;
1664
1665 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1666 GFP_KERNEL);
1667 if (!sdata)
1668 return -ENOMEM;
1669 wdev = &sdata->wdev;
1670
1671 sdata->dev = NULL;
1672 strlcpy(sdata->name, name, IFNAMSIZ);
1673 ieee80211_assign_perm_addr(local, wdev->address, type);
1674 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1675 } else {
1676 if (local->hw.queues >= IEEE80211_NUM_ACS)
1677 txqs = IEEE80211_NUM_ACS;
1678
c835a677 1679 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
6bab2e19 1680 name, name_assign_type,
c835a677 1681 ieee80211_if_setup, txqs, 1);
f142c6b9
JB		 1682 if (!ndev)
1683 return -ENOMEM;
1684 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1685
1686 ndev->needed_headroom = local->tx_headroom +
1687 4*6 /* four MAC addresses */
1688 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1689 + 6 /* mesh */
1690 + 8 /* rfc1042/bridge tunnel */
1691 - ETH_HLEN /* ethernet hard_header_len */
1692 + IEEE80211_ENCRYPT_HEADROOM;
1693 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1694
1695 ret = dev_alloc_name(ndev, ndev->name);
1696 if (ret < 0) {
1697 free_netdev(ndev);
1698 return ret;
1699 }
1700
1701 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1702 if (params && is_valid_ether_addr(params->macaddr))
1703 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1704 else
1705 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1706 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1707
1708 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1709 sdata = netdev_priv(ndev);
1710 ndev->ieee80211_ptr = &sdata->wdev;
1711 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1712 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1713
1714 sdata->dev = ndev;
1715 }
75636525
JB		 1716
1717 /* initialise type-independent data */
f0706e82 1718 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1719 sdata->local = local;
75636525
JB		 1720
1721 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1722 skb_queue_head_init(&sdata->fragments[i].skb_list);
1723
1724 INIT_LIST_HEAD(&sdata->key_list);
1725
164eb02d
SW		 1726 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1727 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1728 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1729 ieee80211_delayed_tailroom_dec);
97f97b1f 1730
37eb0b16
JM		 1731 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1732 struct ieee80211_supported_band *sband;
1733 sband = local->hw.wiphy->bands[i];
1734 sdata->rc_rateidx_mask[i] =
1735 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1736 if (sband)
1737 memcpy(sdata->rc_rateidx_mcs_mask[i],
1738 sband->ht_cap.mcs.rx_mask,
1739 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1740 else
1741 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1742 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1743 }
75636525 1744
3a25a8c8
JB		 1745 ieee80211_set_default_queues(sdata);
1746
1ea6f9c0
JB		 1747 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1748 sdata->user_power_level = local->user_power_level;
1749
2475b1cc
MS		 1750 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1751
75636525
JB		 1752 /* setup type-dependent data */
1753 ieee80211_setup_sdata(sdata, type);
f0706e82 1754
f142c6b9
JB		 1755 if (ndev) {
1756 if (params) {
1757 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1758 if (type == NL80211_IFTYPE_STATION)
1759 sdata->u.mgd.use_4addr = params->use_4addr;
1760 }
9bc383de 1761
f142c6b9 1762 ndev->features |= local->hw.netdev_features;
72d78728 1763
b7ffbd7e
JB		 1764 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1765
f142c6b9
JB		 1766 ret = register_netdevice(ndev);
1767 if (ret) {
1768 free_netdev(ndev);
1769 return ret;
1770 }
1771 }
f0706e82 1772
c771c9d8 1773 mutex_lock(&local->iflist_mtx);
79010420 1774 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1775 mutex_unlock(&local->iflist_mtx);
79010420 1776
84efbb84
JB		 1777 if (new_wdev)
1778 *new_wdev = &sdata->wdev;
f0706e82 1779
f0706e82 1780 return 0;
f0706e82
JB		 1781}
1782
f698d856 1783void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1784{
f0706e82 1785 ASSERT_RTNL();
11a843b7 1786
c771c9d8 1787 mutex_lock(&sdata->local->iflist_mtx);
75636525 1788 list_del_rcu(&sdata->list);
c771c9d8
JB		 1789 mutex_unlock(&sdata->local->iflist_mtx);
1790
75636525 1791 synchronize_rcu();
f142c6b9
JB		 1792
1793 if (sdata->dev) {
1794 unregister_netdevice(sdata->dev);
1795 } else {
1796 cfg80211_unregister_wdev(&sdata->wdev);
1797 kfree(sdata);
1798 }
1799}
1800
1801void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1802{
1803 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1804 return;
1805 ieee80211_do_stop(sdata, true);
1806 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1807}
1808
75636525
JB		 1809/*
1810 * Remove all interfaces, may only be called at hardware unregistration
1811 * time because it doesn't do RCU-safe list removals.
1812 */
1813void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1814{
75636525 1815 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1816 LIST_HEAD(unreg_list);
f142c6b9 1817 LIST_HEAD(wdev_list);
f0706e82
JB		 1818
1819 ASSERT_RTNL();
1820
c8aa22db
JB		 1821 /*
1822 * Close all AP_VLAN interfaces first, as otherwise they
1823 * might be closed while the AP interface they belong to
1824 * is closed, causing unregister_netdevice_many() to crash.
1825 */
1826 list_for_each_entry(sdata, &local->interfaces, list)
1827 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1828 dev_close(sdata->dev);
1829
efe117ab 1830 mutex_lock(&local->iflist_mtx);
75636525
JB		 1831 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1832 list_del(&sdata->list);
c771c9d8 1833
f142c6b9
JB		 1834 if (sdata->dev)
1835 unregister_netdevice_queue(sdata->dev, &unreg_list);
1836 else
1837 list_add(&sdata->list, &wdev_list);
f0706e82 1838 }
efe117ab
ED		 1839 mutex_unlock(&local->iflist_mtx);
1840 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1841
1842 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1843 list_del(&sdata->list);
1844 cfg80211_unregister_wdev(&sdata->wdev);
1845 kfree(sdata);
1846 }
f0706e82 1847}
5cff20e6 1848
47846c9b 1849static int netdev_notify(struct notifier_block *nb,
351638e7 1850 unsigned long state, void *ptr)
47846c9b 1851{
351638e7 1852 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1853 struct ieee80211_sub_if_data *sdata;
1854
1855 if (state != NETDEV_CHANGENAME)
8bd811aa 1856 return NOTIFY_DONE;
47846c9b
JB		 1857
1858 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1859 return NOTIFY_DONE;
47846c9b
JB		 1860
1861 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1862 return NOTIFY_DONE;
47846c9b
JB		 1863
1864 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1865 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1866 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1867
1868 return NOTIFY_OK;
47846c9b
JB		 1869}
1870
1871static struct notifier_block mac80211_netdev_notifier = {
1872 .notifier_call = netdev_notify,
1873};
1874
1875int ieee80211_iface_init(void)
1876{
1877 return register_netdevice_notifier(&mac80211_netdev_notifier);
1878}
1879
1880void ieee80211_iface_exit(void)
1881{
1882 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1883}
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