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mac80211: calculate min channel width correctly
[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
42bd20d9
AE		 46static void ieee80211_iface_work(struct work_struct *work);
47
1ea6f9c0
JB		 48bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49{
50 struct ieee80211_chanctx_conf *chanctx_conf;
51 int power;
52
53 rcu_read_lock();
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
55 if (!chanctx_conf) {
56 rcu_read_unlock();
57 return false;
58 }
59
0430c883 60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 61 rcu_read_unlock();
62
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
65
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
68
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
72 return true;
73 }
74
75 return false;
76}
77
db82d8a9
LB		 78void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
79 bool update_bss)
1ea6f9c0 80{
5ad11b50
EG		 81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
84}
c771c9d8 85
62a40a15 86static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 87{
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
89 return 0;
90
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
93}
94
62a40a15 95static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 96{
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
98 return 0;
99
3b24f4c6 100 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 101
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
104}
105
62a40a15
JB		 106static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
107 bool force_active)
cc45ae54 108{
1d5e1266 109 bool working, scanning, active;
cc45ae54 110 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 111
cc45ae54
JB		 112 lockdep_assert_held(&local->mtx);
113
62a40a15
JB		 114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
116 local->monitors;
cc45ae54 117
1d5e1266
JB		 118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
cc45ae54 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
3899ba90 153static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 154 bool check_dup)
478622e8 155{
ac20976d
HS		 156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
478622e8
HS		 158 u64 new, mask, tmp;
159 u8 *m;
160 int ret = 0;
161
162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
163 return 0;
164
165 m = addr;
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
169
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
174
31eba5bc
FF		 175 if (!check_dup)
176 return ret;
478622e8
HS		 177
178 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 179 list_for_each_entry(iter, &local->interfaces, list) {
180 if (iter == sdata)
478622e8
HS		 181 continue;
182
3899ba90 183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 185 continue;
186
ac20976d 187 m = iter->vif.addr;
478622e8
HS		 188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
191
192 if ((new & ~mask) != (tmp & ~mask)) {
193 ret = -EINVAL;
194 break;
195 }
196 }
197 mutex_unlock(&local->iflist_mtx);
198
199 return ret;
200}
201
47846c9b
JB		 202static int ieee80211_change_mac(struct net_device *dev, void *addr)
203{
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 205 struct sockaddr *sa = addr;
31eba5bc 206 bool check_dup = true;
47846c9b
JB		 207 int ret;
208
9607e6b6 209 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 210 return -EBUSY;
211
31eba5bc 212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 214 check_dup = false;
215
3899ba90 216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 217 if (ret)
218 return ret;
219
fc5f7577 220 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 221
222 if (ret == 0)
fc5f7577 223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 224
225 return ret;
226}
227
0d143fe1
JB		 228static inline int identical_mac_addr_allowed(int type1, int type2)
229{
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
235 (type1 == NL80211_IFTYPE_WDS &&
236 (type2 == NL80211_IFTYPE_WDS ||
237 type2 == NL80211_IFTYPE_AP)) ||
238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
239 (type1 == NL80211_IFTYPE_AP_VLAN &&
240 (type2 == NL80211_IFTYPE_AP ||
241 type2 == NL80211_IFTYPE_AP_VLAN));
242}
243
87490f6d
JB		 244static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
245 enum nl80211_iftype iftype)
0d143fe1 246{
b4a4bf5d 247 struct ieee80211_local *local = sdata->local;
87490f6d 248 struct ieee80211_sub_if_data *nsdata;
b6a55015 249 int ret;
0d143fe1 250
87490f6d 251 ASSERT_RTNL();
0d143fe1
JB		 252
253 /* we hold the RTNL here so can safely walk the list */
254 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 255 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 256 /*
257 * Only OCB and monitor mode may coexist
258 */
259 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
260 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
261 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
262 nsdata->vif.type == NL80211_IFTYPE_OCB))
263 return -EBUSY;
264
0d143fe1
JB		 265 /*
266 * Allow only a single IBSS interface to be up at any
267 * time. This is restricted because beacon distribution
268 * cannot work properly if both are in the same IBSS.
269 *
270 * To remove this restriction we'd have to disallow them
271 * from setting the same SSID on different IBSS interfaces
272 * belonging to the same hardware. Then, however, we're
273 * faced with having to adopt two different TSF timers...
274 */
87490f6d 275 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 276 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
277 return -EBUSY;
73da7d5b
SW		 278 /*
279 * will not add another interface while any channel
280 * switch is active.
281 */
282 if (nsdata->vif.csa_active)
283 return -EBUSY;
0d143fe1
JB		 284
285 /*
286 * The remaining checks are only performed for interfaces
287 * with the same MAC address.
288 */
371a255e
JB		 289 if (!ether_addr_equal(sdata->vif.addr,
290 nsdata->vif.addr))
0d143fe1
JB		 291 continue;
292
293 /*
294 * check whether it may have the same address
295 */
87490f6d 296 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 297 nsdata->vif.type))
298 return -ENOTUNIQ;
299
300 /*
301 * can only add VLANs to enabled APs
302 */
87490f6d 303 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 304 nsdata->vif.type == NL80211_IFTYPE_AP)
305 sdata->bss = &nsdata->u.ap;
306 }
307 }
308
b6a55015
LC		 309 mutex_lock(&local->chanctx_mtx);
310 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
311 mutex_unlock(&local->chanctx_mtx);
312 return ret;
87490f6d
JB		 313}
314
a9865538
JB		 315static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
316 enum nl80211_iftype iftype)
3a25a8c8
JB		 317{
318 int n_queues = sdata->local->hw.queues;
319 int i;
320
708d50ed
AB		 321 if (iftype == NL80211_IFTYPE_NAN)
322 return 0;
323
a9865538 324 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 325 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
326 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
327 IEEE80211_INVAL_HW_QUEUE))
328 return -EINVAL;
329 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
330 n_queues))
331 return -EINVAL;
332 }
3a25a8c8
JB		 333 }
334
a9865538
JB		 335 if ((iftype != NL80211_IFTYPE_AP &&
336 iftype != NL80211_IFTYPE_P2P_GO &&
337 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 338 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 339 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
340 return 0;
341 }
342
343 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
344 return -EINVAL;
345
346 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
347 return -EINVAL;
348
349 return 0;
350}
351
85416a4f
CL		 352void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
353 const int offset)
354{
355 struct ieee80211_local *local = sdata->local;
d8212184 356 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 357
358#define ADJUST(_f, _s) do { \
359 if (flags & MONITOR_FLAG_##_f) \
360 local->fif_##_s += offset; \
361 } while (0)
362
363 ADJUST(FCSFAIL, fcsfail);
364 ADJUST(PLCPFAIL, plcpfail);
365 ADJUST(CONTROL, control);
366 ADJUST(CONTROL, pspoll);
367 ADJUST(OTHER_BSS, other_bss);
368
369#undef ADJUST
370}
371
3a25a8c8
JB		 372static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
373{
374 struct ieee80211_local *local = sdata->local;
375 int i;
376
377 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 378 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 379 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 380 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 381 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 382 else
383 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 384 }
385 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
386}
387
3c3e21e7 388int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 389{
390 struct ieee80211_sub_if_data *sdata;
8b305780 391 int ret;
4b6f1dd6 392
30686bf7 393 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 394 return 0;
395
8b305780 396 ASSERT_RTNL();
685fb72b 397
4b6f1dd6 398 if (local->monitor_sdata)
8b305780 399 return 0;
4b6f1dd6
JB		 400
401 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 402 if (!sdata)
403 return -ENOMEM;
4b6f1dd6
JB		 404
405 /* set up data */
406 sdata->local = local;
407 sdata->vif.type = NL80211_IFTYPE_MONITOR;
408 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
409 wiphy_name(local->hw.wiphy));
34171dc0 410 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 411
2475b1cc
MS		 412 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
413
3a25a8c8
JB		 414 ieee80211_set_default_queues(sdata);
415
4b6f1dd6
JB		 416 ret = drv_add_interface(local, sdata);
417 if (WARN_ON(ret)) {
418 /* ok .. stupid driver, it asked for this! */
419 kfree(sdata);
8b305780 420 return ret;
4b6f1dd6
JB		 421 }
422
a9865538 423 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 424 if (ret) {
425 kfree(sdata);
8b305780 426 return ret;
3a25a8c8
JB		 427 }
428
fab57a6c
JB		 429 mutex_lock(&local->iflist_mtx);
430 rcu_assign_pointer(local->monitor_sdata, sdata);
431 mutex_unlock(&local->iflist_mtx);
432
34a3740d 433 mutex_lock(&local->mtx);
4bf88530 434 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 435 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 436 mutex_unlock(&local->mtx);
55de908a 437 if (ret) {
fab57a6c 438 mutex_lock(&local->iflist_mtx);
0c2bef46 439 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 440 mutex_unlock(&local->iflist_mtx);
441 synchronize_net();
55de908a
JB		 442 drv_remove_interface(local, sdata);
443 kfree(sdata);
8b305780 444 return ret;
55de908a
JB		 445 }
446
42bd20d9
AE		 447 skb_queue_head_init(&sdata->skb_queue);
448 INIT_WORK(&sdata->work, ieee80211_iface_work);
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
30686bf7 457 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 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;
f9dca80b
MK		 525
526 mutex_lock(&local->key_mtx);
527 sdata->crypto_tx_tailroom_needed_cnt +=
528 master->crypto_tx_tailroom_needed_cnt;
529 mutex_unlock(&local->key_mtx);
530
0d143fe1 531 break;
665c93a9 532 }
0d143fe1
JB		 533 case NL80211_IFTYPE_AP:
534 sdata->bss = &sdata->u.ap;
535 break;
536 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 537 case NL80211_IFTYPE_STATION:
538 case NL80211_IFTYPE_MONITOR:
539 case NL80211_IFTYPE_ADHOC:
f142c6b9 540 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 541 case NL80211_IFTYPE_OCB:
cb3b7d87 542 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 543 /* no special treatment */
544 break;
545 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 546 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 547 case NL80211_IFTYPE_P2P_CLIENT:
548 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 549 /* cannot happen */
550 WARN_ON(1);
551 break;
552 }
553
554 if (local->open_count == 0) {
24487981 555 res = drv_start(local);
0d143fe1
JB		 556 if (res)
557 goto err_del_bss;
e8975581
JB		 558 /* we're brought up, everything changes */
559 hw_reconf_flags = ~0;
1f87f7d3 560 ieee80211_led_radio(local, true);
67408c8c
JB		 561 ieee80211_mod_tpt_led_trig(local,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 563 }
564
565 /*
bf533e0b
JB		 566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
0d143fe1 568 */
f142c6b9 569 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 570 memcpy(dev->dev_addr,
571 local->hw.wiphy->perm_addr,
572 ETH_ALEN);
573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
574
575 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 576 res = -EADDRNOTAVAIL;
577 goto err_stop;
0adc23f5 578 }
0d143fe1
JB		 579 }
580
0d143fe1
JB		 581 switch (sdata->vif.type) {
582 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata->bss->beacon)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 586 netif_carrier_on(dev);
4d76d21b 587 } else {
3edaf3e6 588 netif_carrier_off(dev);
4d76d21b 589 }
0d143fe1
JB		 590 break;
591 case NL80211_IFTYPE_MONITOR:
d8212184 592 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 593 local->cooked_mntrs++;
594 break;
595 }
596
d8212184 597 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 598 res = drv_add_interface(local, sdata);
599 if (res)
600 goto err_stop;
601 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 602 res = ieee80211_add_virtual_monitor(local);
603 if (res)
604 goto err_stop;
605 }
606
0d143fe1
JB		 607 /* must be before the call to ieee80211_configure_filter */
608 local->monitors++;
e8975581 609 if (local->monitors == 1) {
0869aea0
JB		 610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 612 }
0d143fe1 613
85416a4f 614 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 615 ieee80211_configure_filter(local);
801d929c
FF		 616 mutex_lock(&local->mtx);
617 ieee80211_recalc_idle(local);
618 mutex_unlock(&local->mtx);
53e9b1de
DG		 619
620 netif_carrier_on(dev);
0d143fe1 621 break;
0d143fe1 622 default:
34d4bc4d 623 if (coming_up) {
075e0847
JB		 624 ieee80211_del_virtual_monitor(local);
625
7b7eab6f 626 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 627 if (res)
628 goto err_stop;
a9865538
JB		 629 res = ieee80211_check_queues(sdata,
630 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 631 if (res)
632 goto err_del_interface;
34d4bc4d 633 }
0d143fe1 634
29cbe68c 635 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 636 local->fif_pspoll++;
7be5086d 637 local->fif_probe_req++;
e3b90ca2 638
e3b90ca2 639 ieee80211_configure_filter(local);
7be5086d
JB		 640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
641 local->fif_probe_req++;
a3c9aa51 642 }
e3b90ca2 643
708d50ed
AB		 644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
645 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 646 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 647 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 648
c405c629
JB		 649 switch (sdata->vif.type) {
650 case NL80211_IFTYPE_STATION:
651 case NL80211_IFTYPE_ADHOC:
652 case NL80211_IFTYPE_AP:
653 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 654 case NL80211_IFTYPE_OCB:
0d143fe1 655 netif_carrier_off(dev);
c405c629 656 break;
1411af15 657 case NL80211_IFTYPE_WDS:
f142c6b9 658 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 659 case NL80211_IFTYPE_NAN:
1411af15 660 break;
c405c629 661 default:
a2310824
JB		 662 /* not reached */
663 WARN_ON(1);
c405c629 664 }
59034591
EP		 665
666 /*
cec66283 667 * Set default queue parameters so drivers don't
59034591 668 * need to initialise the hardware if the hardware
cec66283
JB		 669 * doesn't start up with sane defaults.
670 * Enable QoS for anything but station interfaces.
59034591 671 */
cec66283
JB		 672 ieee80211_set_wmm_default(sdata, true,
673 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 674 }
675
2d2080c3
JB		 676 set_bit(SDATA_STATE_RUNNING, &sdata->state);
677
0d143fe1
JB		 678 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
679 /* Create STA entry for the WDS peer */
680 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
681 GFP_KERNEL);
682 if (!sta) {
683 res = -ENOMEM;
684 goto err_del_interface;
685 }
686
83d5cc01
JB		 687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
688 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 690
691 res = sta_info_insert(sta);
692 if (res) {
693 /* STA has been freed */
694 goto err_del_interface;
695 }
1be7fe8d
BJ		 696
697 rate_control_rate_init(sta);
1411af15 698 netif_carrier_on(dev);
f142c6b9
JB		 699 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
700 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 701 }
702
0d143fe1
JB		 703 /*
704 * set_multicast_list will be invoked by the networking core
705 * which will check whether any increments here were done in
706 * error and sync them down to the hardware as filter flags.
707 */
708 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
709 atomic_inc(&local->iff_allmultis);
710
34d4bc4d
JB		 711 if (coming_up)
712 local->open_count++;
713
59034591 714 if (hw_reconf_flags)
e8975581 715 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 716
4a733ef1 717 ieee80211_recalc_ps(local);
965bedad 718
2b436312
JB		 719 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
720 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
721 /* XXX: for AP_VLAN, actually track AP queues */
722 netif_tx_start_all_queues(dev);
723 } else if (dev) {
2b730daa
JB		 724 unsigned long flags;
725 int n_acs = IEEE80211_NUM_ACS;
726 int ac;
727
728 if (local->hw.queues < IEEE80211_NUM_ACS)
729 n_acs = 1;
730
731 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
732 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
733 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
734 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
735 for (ac = 0; ac < n_acs; ac++) {
736 int ac_queue = sdata->vif.hw_queue[ac];
737
738 if (local->queue_stop_reasons[ac_queue] == 0 &&
739 skb_queue_empty(&local->pending[ac_queue]))
740 netif_start_subqueue(dev, ac);
741 }
742 }
743 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
744 }
0d143fe1
JB		 745
746 return 0;
747 err_del_interface:
7b7eab6f 748 drv_remove_interface(local, sdata);
0d143fe1 749 err_stop:
24487981
JB		 750 if (!local->open_count)
751 drv_stop(local);
0d143fe1
JB		 752 err_del_bss:
753 sdata->bss = NULL;
4e141dad
MK		 754 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
755 mutex_lock(&local->mtx);
0d143fe1 756 list_del(&sdata->u.vlan.list);
4e141dad
MK		 757 mutex_unlock(&local->mtx);
758 }
4d6c36fa 759 /* might already be clear but that doesn't matter */
2d2080c3 760 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 761 return res;
762}
763
34d4bc4d 764static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 765{
766 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 767 int err;
768
769 /* fail early if user set an invalid address */
2fcf2824 770 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 771 return -EADDRNOTAVAIL;
772
773 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
774 if (err)
775 return err;
776
f142c6b9 777 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 778}
779
780static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
781 bool going_down)
782{
0d143fe1 783 struct ieee80211_local *local = sdata->local;
fa962b92 784 struct fq *fq = &local->fq;
5061b0c2
JB		 785 unsigned long flags;
786 struct sk_buff *skb, *tmp;
e8975581 787 u32 hw_reconf_flags = 0;
09f4114e 788 int i, flushed;
397a7a24 789 struct ps_data *ps;
d2859df5 790 struct cfg80211_chan_def chandef;
46238845 791 bool cancel_scan;
167e33f4 792 struct cfg80211_nan_func *func;
0d143fe1 793
c29acf20
RM		 794 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
795
46238845
JB		 796 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
797 if (cancel_scan)
352ffad6
BC		 798 ieee80211_scan_cancel(local);
799
0d143fe1
JB		 800 /*
801 * Stop TX on this interface first.
802 */
f142c6b9
JB		 803 if (sdata->dev)
804 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 805
c8f994ee 806 ieee80211_roc_purge(local, sdata);
af6b6374 807
8ffcc704
EG		 808 switch (sdata->vif.type) {
809 case NL80211_IFTYPE_STATION:
572078be 810 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 811 break;
812 case NL80211_IFTYPE_ADHOC:
cd7760e6 813 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 814 break;
815 case NL80211_IFTYPE_AP:
816 cancel_work_sync(&sdata->u.ap.request_smps_work);
817 break;
818 default:
819 break;
820 }
cd7760e6 821
0d143fe1
JB		 822 /*
823 * Remove all stations associated with this interface.
824 *
825 * This must be done before calling ops->remove_interface()
826 * because otherwise we can later invoke ops->sta_notify()
827 * whenever the STAs are removed, and that invalidates driver
828 * assumptions about always getting a vif pointer that is valid
829 * (because if we remove a STA after ops->remove_interface()
830 * the driver will have removed the vif info already!)
831 *
5eb8f4d7
JB		 832 * In WDS mode a station must exist here and be flushed, for
833 * AP_VLANs stations may exist since there's nothing else that
834 * would have removed them, but in other modes there shouldn't
835 * be any stations.
0d143fe1 836 */
d34ba216 837 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 838 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
839 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
840 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 841
df140465 842 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 843 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
844 atomic_dec(&local->iff_allmultis);
845
7be5086d 846 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 847 local->fif_pspoll--;
7be5086d
JB		 848 local->fif_probe_req--;
849 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
850 local->fif_probe_req--;
851 }
e3b90ca2 852
f142c6b9
JB		 853 if (sdata->dev) {
854 netif_addr_lock_bh(sdata->dev);
855 spin_lock_bh(&local->filter_lock);
856 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
857 sdata->dev->addr_len);
858 spin_unlock_bh(&local->filter_lock);
859 netif_addr_unlock_bh(sdata->dev);
f142c6b9 860 }
3ac64bee 861
7cbf0ba5
VN		 862 del_timer_sync(&local->dynamic_ps_timer);
863 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 864
04ecd257 865 cancel_work_sync(&sdata->recalc_smps);
dbd72850 866 sdata_lock(sdata);
59af6928 867 mutex_lock(&local->mtx);
73da7d5b 868 sdata->vif.csa_active = false;
0c21e632
LC		 869 if (sdata->vif.type == NL80211_IFTYPE_STATION)
870 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 871 if (sdata->csa_block_tx) {
872 ieee80211_wake_vif_queues(local, sdata,
873 IEEE80211_QUEUE_STOP_REASON_CSA);
874 sdata->csa_block_tx = false;
875 }
59af6928 876 mutex_unlock(&local->mtx);
dbd72850 877 sdata_unlock(sdata);
59af6928 878
73da7d5b 879 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 880
164eb02d
SW		 881 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
882
883 if (sdata->wdev.cac_started) {
d2859df5 884 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 885 WARN_ON(local->suspended);
34a3740d 886 mutex_lock(&local->mtx);
164eb02d 887 ieee80211_vif_release_channel(sdata);
34a3740d 888 mutex_unlock(&local->mtx);
d2859df5
JD		 889 cfg80211_cac_event(sdata->dev, &chandef,
890 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 891 GFP_KERNEL);
892 }
893
0d143fe1
JB		 894 /* APs need special treatment */
895 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 896 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 897
898 /* down all dependent devices, that is VLANs */
57c9fff3 899 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 900 u.vlan.list)
901 dev_close(vlan->dev);
902 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 903 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
904 /* remove all packets in parent bc_buf pointing to this dev */
905 ps = &sdata->bss->ps;
906
907 spin_lock_irqsave(&ps->bc_buf.lock, flags);
908 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
909 if (skb->dev == sdata->dev) {
910 __skb_unlink(skb, &ps->bc_buf);
911 local->total_ps_buffered--;
912 ieee80211_free_txskb(&local->hw, skb);
913 }
914 }
915 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 916 }
917
34d4bc4d
JB		 918 if (going_down)
919 local->open_count--;
0d143fe1
JB		 920
921 switch (sdata->vif.type) {
922 case NL80211_IFTYPE_AP_VLAN:
4e141dad 923 mutex_lock(&local->mtx);
0d143fe1 924 list_del(&sdata->u.vlan.list);
4e141dad 925 mutex_unlock(&local->mtx);
0c2bef46 926 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 927 /* see comment in the default case below */
928 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 929 /* no need to tell driver */
930 break;
931 case NL80211_IFTYPE_MONITOR:
d8212184 932 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 933 local->cooked_mntrs--;
934 break;
935 }
936
937 local->monitors--;
e8975581 938 if (local->monitors == 0) {
0869aea0
JB		 939 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
940 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 941 }
0d143fe1 942
85416a4f 943 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 944 break;
167e33f4
AB		 945 case NL80211_IFTYPE_NAN:
946 /* clean all the functions */
947 spin_lock_bh(&sdata->u.nan.func_lock);
948
949 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
950 idr_remove(&sdata->u.nan.function_inst_ids, i);
951 cfg80211_free_nan_func(func);
952 }
953 idr_destroy(&sdata->u.nan.function_inst_ids);
954
955 spin_unlock_bh(&sdata->u.nan.func_lock);
956 break;
f142c6b9
JB		 957 case NL80211_IFTYPE_P2P_DEVICE:
958 /* relies on synchronize_rcu() below */
0c2bef46 959 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 960 /* fall through */
0d143fe1 961 default:
0b7dff4f 962 cancel_work_sync(&sdata->work);
35f20c14
JB		 963 /*
964 * When we get here, the interface is marked down.
7907c7d3 965 * Free the remaining keys, if there are any
10b68487
FF		 966 * (which can happen in AP mode if userspace sets
967 * keys before the interface is operating, and maybe
968 * also in WDS mode)
75de9113 969 *
7907c7d3
JB		 970 * Force the key freeing to always synchronize_net()
971 * to wait for the RX path in case it is using this
10b68487 972 * interface enqueuing frames at this very time on
75de9113 973 * another CPU.
35f20c14 974 */
7907c7d3 975 ieee80211_free_keys(sdata, true);
1861b845 976 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 977 }
978
979 sdata->bss = NULL;
980
5061b0c2
JB		 981 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
982 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
983 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
984 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
985 if (info->control.vif == &sdata->vif) {
986 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 987 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 988 }
989 }
990 }
991 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 992
ba8c3d6f
FF		 993 if (sdata->vif.txq) {
994 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
995
fa962b92
MK		 996 spin_lock_bh(&fq->lock);
997 ieee80211_txq_purge(local, txqi);
998 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 999 }
1000
b2c0958b
JB		 1001 if (local->open_count == 0)
1002 ieee80211_clear_tx_pending(local);
1003
1004 /*
1005 * If the interface goes down while suspended, presumably because
1006 * the device was unplugged and that happens before our resume,
1007 * then the driver is already unconfigured and the remainder of
1008 * this function isn't needed.
1009 * XXX: what about WoWLAN? If the device has software state, e.g.
1010 * memory allocated, it might expect teardown commands from
1011 * mac80211 here?
1012 */
1013 if (local->suspended) {
1014 WARN_ON(local->wowlan);
1015 WARN_ON(rtnl_dereference(local->monitor_sdata));
1016 return;
1017 }
1018
1019 switch (sdata->vif.type) {
1020 case NL80211_IFTYPE_AP_VLAN:
1021 break;
1022 case NL80211_IFTYPE_MONITOR:
1023 if (local->monitors == 0)
1024 ieee80211_del_virtual_monitor(local);
1025
1026 mutex_lock(&local->mtx);
1027 ieee80211_recalc_idle(local);
1028 mutex_unlock(&local->mtx);
31eba5bc 1029
d8212184 1030 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1031 break;
1032
1033 /* fall through */
b2c0958b
JB		 1034 default:
1035 if (going_down)
1036 drv_remove_interface(local, sdata);
1037 }
1038
4a733ef1 1039 ieee80211_recalc_ps(local);
b2c0958b 1040
46238845
JB		 1041 if (cancel_scan)
1042 flush_delayed_work(&local->scan_work);
1043
b2c0958b
JB		 1044 if (local->open_count == 0) {
1045 ieee80211_stop_device(local);
1046
1047 /* no reconfiguring after stop! */
1048 return;
1049 }
1050
1051 /* do after stop to avoid reconfiguring when we stop anyway */
1052 ieee80211_configure_filter(local);
1053 ieee80211_hw_config(local, hw_reconf_flags);
1054
1055 if (local->monitors == local->open_count)
075e0847 1056 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1057}
1058
1059static int ieee80211_stop(struct net_device *dev)
1060{
1061 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1062
1063 ieee80211_do_stop(sdata, true);
5061b0c2 1064
0d143fe1
JB		 1065 return 0;
1066}
1067
1068static void ieee80211_set_multicast_list(struct net_device *dev)
1069{
0d143fe1 1070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1071 struct ieee80211_local *local = sdata->local;
df140465 1072 int allmulti, sdata_allmulti;
0d143fe1
JB		 1073
1074 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1075 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1076
1077 if (allmulti != sdata_allmulti) {
1078 if (dev->flags & IFF_ALLMULTI)
1079 atomic_inc(&local->iff_allmultis);
1080 else
1081 atomic_dec(&local->iff_allmultis);
1082 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1083 }
1084
3b8d81e0 1085 spin_lock_bh(&local->filter_lock);
22bedad3 1086 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1087 spin_unlock_bh(&local->filter_lock);
3ac64bee 1088 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1089}
1090
75636525
JB		 1091/*
1092 * Called when the netdev is removed or, by the code below, before
1093 * the interface type changes.
1094 */
f142c6b9 1095static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1096{
1097 int i;
1098
75636525 1099 /* free extra data */
7907c7d3 1100 ieee80211_free_keys(sdata, false);
75636525 1101
aee14ceb
JM		 1102 ieee80211_debugfs_remove_netdev(sdata);
1103
f0706e82 1104 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1105 __skb_queue_purge(&sdata->fragments[i].skb_list);
1106 sdata->fragment_next = 0;
11a843b7 1107
b9dcf712 1108 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1109 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1110}
1111
f142c6b9
JB		 1112static void ieee80211_uninit(struct net_device *dev)
1113{
1114 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1115}
1116
cf0277e7 1117static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1118 struct sk_buff *skb,
99932d4f
DB		 1119 void *accel_priv,
1120 select_queue_fallback_t fallback)
cf0277e7
JB		 1121{
1122 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1123}
1124
5a490510
JB		 1125static struct rtnl_link_stats64 *
1126ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1127{
1128 int i;
1129
1130 for_each_possible_cpu(i) {
1131 const struct pcpu_sw_netstats *tstats;
1132 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1133 unsigned int start;
1134
1135 tstats = per_cpu_ptr(dev->tstats, i);
1136
1137 do {
1138 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1139 rx_packets = tstats->rx_packets;
1140 tx_packets = tstats->tx_packets;
1141 rx_bytes = tstats->rx_bytes;
1142 tx_bytes = tstats->tx_bytes;
1143 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1144
1145 stats->rx_packets += rx_packets;
1146 stats->tx_packets += tx_packets;
1147 stats->rx_bytes += rx_bytes;
1148 stats->tx_bytes += tx_bytes;
1149 }
1150
1151 return stats;
1152}
1153
587e729e
JB		 1154static const struct net_device_ops ieee80211_dataif_ops = {
1155 .ndo_open = ieee80211_open,
1156 .ndo_stop = ieee80211_stop,
f142c6b9 1157 .ndo_uninit = ieee80211_uninit,
587e729e 1158 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1159 .ndo_set_rx_mode = ieee80211_set_multicast_list,
47846c9b 1160 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1161 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1162 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1163};
1164
cf0277e7 1165static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1166 struct sk_buff *skb,
99932d4f
DB		 1167 void *accel_priv,
1168 select_queue_fallback_t fallback)
cf0277e7
JB		 1169{
1170 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1171 struct ieee80211_local *local = sdata->local;
1172 struct ieee80211_hdr *hdr;
1173 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1174
32c5057b 1175 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1176 return 0;
1177
1178 if (skb->len < 4 ||
b49bb574 1179 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1180 return 0; /* doesn't matter, frame will be dropped */
1181
b49bb574 1182 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1183
00e96dec 1184 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1185}
1186
587e729e
JB		 1187static const struct net_device_ops ieee80211_monitorif_ops = {
1188 .ndo_open = ieee80211_open,
1189 .ndo_stop = ieee80211_stop,
f142c6b9 1190 .ndo_uninit = ieee80211_uninit,
587e729e 1191 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1192 .ndo_set_rx_mode = ieee80211_set_multicast_list,
31eba5bc 1193 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1194 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1195 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1196};
1197
5a490510
JB		 1198static void ieee80211_if_free(struct net_device *dev)
1199{
1200 free_percpu(dev->tstats);
1201 free_netdev(dev);
1202}
1203
587e729e
JB		 1204static void ieee80211_if_setup(struct net_device *dev)
1205{
1206 ether_setup(dev);
550fd08c 1207 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1208 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1209 dev->destructor = ieee80211_if_free;
587e729e
JB		 1210}
1211
80a83cfc
MK		 1212static void ieee80211_if_setup_no_queue(struct net_device *dev)
1213{
1214 ieee80211_if_setup(dev);
1215 dev->priv_flags |= IFF_NO_QUEUE;
1216}
1217
1fa57d01
JB		 1218static void ieee80211_iface_work(struct work_struct *work)
1219{
1220 struct ieee80211_sub_if_data *sdata =
1221 container_of(work, struct ieee80211_sub_if_data, work);
1222 struct ieee80211_local *local = sdata->local;
1223 struct sk_buff *skb;
344eec67 1224 struct sta_info *sta;
c1475ca9 1225 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1226 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1227
1228 if (!ieee80211_sdata_running(sdata))
1229 return;
1230
fc58c47e 1231 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1232 return;
1233
4afaff17 1234 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1235 return;
1236
1237 /* first process frames */
1238 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1239 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1240
c1475ca9
JB		 1241 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1242 ra_tid = (void *)&skb->cb;
1243 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1244 ra_tid->tid);
1245 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1246 ra_tid = (void *)&skb->cb;
1247 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1248 ra_tid->tid);
08cf42e8
MK		 1249 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1250 rx_agg = (void *)&skb->cb;
1251 mutex_lock(&local->sta_mtx);
1252 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1253 if (sta)
08cf42e8 1254 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1255 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1256 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1257 false, true);
08cf42e8
MK		 1258 mutex_unlock(&local->sta_mtx);
1259 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1260 rx_agg = (void *)&skb->cb;
1261 mutex_lock(&local->sta_mtx);
1262 sta = sta_info_get_bss(sdata, rx_agg->addr);
1263 if (sta)
1264 __ieee80211_stop_rx_ba_session(sta,
1265 rx_agg->tid,
1266 WLAN_BACK_RECIPIENT, 0,
1267 false);
1268 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1269 } else if (ieee80211_is_action(mgmt->frame_control) &&
1270 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1271 int len = skb->len;
bed7ee6e 1272
a93e3644 1273 mutex_lock(&local->sta_mtx);
875ae5f6 1274 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1275 if (sta) {
1276 switch (mgmt->u.action.u.addba_req.action_code) {
1277 case WLAN_ACTION_ADDBA_REQ:
1278 ieee80211_process_addba_request(
1279 local, sta, mgmt, len);
1280 break;
1281 case WLAN_ACTION_ADDBA_RESP:
1282 ieee80211_process_addba_resp(local, sta,
1283 mgmt, len);
1284 break;
1285 case WLAN_ACTION_DELBA:
1286 ieee80211_process_delba(sdata, sta,
1287 mgmt, len);
1288 break;
1289 default:
1290 WARN_ON(1);
1291 break;
1292 }
1293 }
a93e3644 1294 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1295 } else if (ieee80211_is_action(mgmt->frame_control) &&
1296 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1297 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1298 case WLAN_VHT_ACTION_GROUPID_MGMT:
1299 ieee80211_process_mu_groups(sdata, mgmt);
1300 break;
1301 default:
1302 WARN_ON(1);
1303 break;
1304 }
344eec67
JB		 1305 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1306 struct ieee80211_hdr *hdr = (void *)mgmt;
1307 /*
1308 * So the frame isn't mgmt, but frame_control
1309 * is at the right place anyway, of course, so
1310 * the if statement is correct.
1311 *
1312 * Warn if we have other data frame types here,
1313 * they must not get here.
1314 */
1315 WARN_ON(hdr->frame_control &
1316 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1317 WARN_ON(!(hdr->seq_ctrl &
1318 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1319 /*
1320 * This was a fragment of a frame, received while
1321 * a block-ack session was active. That cannot be
1322 * right, so terminate the session.
1323 */
a93e3644 1324 mutex_lock(&local->sta_mtx);
875ae5f6 1325 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1326 if (sta) {
1327 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1328 IEEE80211_QOS_CTL_TID_MASK;
1329
1330 __ieee80211_stop_rx_ba_session(
1331 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1332 WLAN_REASON_QSTA_REQUIRE_SETUP,
1333 true);
344eec67 1334 }
a93e3644 1335 mutex_unlock(&local->sta_mtx);
bed7ee6e 1336 } else switch (sdata->vif.type) {
1fa57d01
JB		 1337 case NL80211_IFTYPE_STATION:
1338 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1339 break;
1340 case NL80211_IFTYPE_ADHOC:
1341 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1342 break;
1343 case NL80211_IFTYPE_MESH_POINT:
1344 if (!ieee80211_vif_is_mesh(&sdata->vif))
1345 break;
1346 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1347 break;
1348 default:
1349 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1350 break;
1351 }
36b3a628
JB		 1352
1353 kfree_skb(skb);
1fa57d01
JB		 1354 }
1355
1356 /* then other type-dependent work */
1357 switch (sdata->vif.type) {
1358 case NL80211_IFTYPE_STATION:
1359 ieee80211_sta_work(sdata);
1360 break;
1361 case NL80211_IFTYPE_ADHOC:
1362 ieee80211_ibss_work(sdata);
1363 break;
1364 case NL80211_IFTYPE_MESH_POINT:
1365 if (!ieee80211_vif_is_mesh(&sdata->vif))
1366 break;
1367 ieee80211_mesh_work(sdata);
1368 break;
239281f8
RL		 1369 case NL80211_IFTYPE_OCB:
1370 ieee80211_ocb_work(sdata);
1371 break;
1fa57d01
JB		 1372 default:
1373 break;
1374 }
1375}
1376
04ecd257
JB		 1377static void ieee80211_recalc_smps_work(struct work_struct *work)
1378{
1379 struct ieee80211_sub_if_data *sdata =
1380 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1381
1382 ieee80211_recalc_smps(sdata);
1383}
1fa57d01 1384
75636525
JB		 1385/*
1386 * Helper function to initialise an interface to a specific type.
1387 */
1388static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1389 enum nl80211_iftype type)
f0706e82 1390{
239281f8
RL		 1391 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1392 0xff, 0xff, 0xff};
1393
75636525
JB		 1394 /* clear type-dependent union */
1395 memset(&sdata->u, 0, sizeof(sdata->u));
1396
1397 /* and set some type-dependent values */
1398 sdata->vif.type = type;
2ca27bcf 1399 sdata->vif.p2p = false;
60719ffd 1400 sdata->wdev.iftype = type;
75636525 1401
a621fa4d
JB		 1402 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1403 sdata->control_port_no_encrypt = false;
2475b1cc 1404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1405 sdata->vif.bss_conf.idle = true;
a621fa4d 1406
b53be792
SW		 1407 sdata->noack_map = 0;
1408
f142c6b9
JB		 1409 /* only monitor/p2p-device differ */
1410 if (sdata->dev) {
1411 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1412 sdata->dev->type = ARPHRD_ETHER;
1413 }
75636525 1414
35f20c14 1415 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1416 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1417 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1418 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1419 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1420 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1421
75636525 1422 switch (type) {
2ca27bcf
JB		 1423 case NL80211_IFTYPE_P2P_GO:
1424 type = NL80211_IFTYPE_AP;
1425 sdata->vif.type = type;
1426 sdata->vif.p2p = true;
1427 /* fall through */
05c914fe 1428 case NL80211_IFTYPE_AP:
d012a605 1429 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1430 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1431 INIT_WORK(&sdata->u.ap.request_smps_work,
1432 ieee80211_request_smps_ap_work);
ad2d223a 1433 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1434 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1435 break;
2ca27bcf
JB		 1436 case NL80211_IFTYPE_P2P_CLIENT:
1437 type = NL80211_IFTYPE_STATION;
1438 sdata->vif.type = type;
1439 sdata->vif.p2p = true;
1440 /* fall through */
05c914fe 1441 case NL80211_IFTYPE_STATION:
ad2d223a 1442 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1443 ieee80211_sta_setup_sdata(sdata);
472dbc45 1444 break;
6e0bd6c3 1445 case NL80211_IFTYPE_OCB:
239281f8
RL		 1446 sdata->vif.bss_conf.bssid = bssid_wildcard;
1447 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1448 break;
46900298 1449 case NL80211_IFTYPE_ADHOC:
ad2d223a 1450 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1451 ieee80211_ibss_setup_sdata(sdata);
1452 break;
05c914fe 1453 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1454 if (ieee80211_vif_is_mesh(&sdata->vif))
1455 ieee80211_mesh_init_sdata(sdata);
1456 break;
05c914fe 1457 case NL80211_IFTYPE_MONITOR:
75636525 1458 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1459 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1460 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1461 MONITOR_FLAG_OTHER_BSS;
1462 break;
05c914fe 1463 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1464 sdata->vif.bss_conf.bssid = NULL;
1465 break;
167e33f4
AB		 1466 case NL80211_IFTYPE_NAN:
1467 idr_init(&sdata->u.nan.function_inst_ids);
1468 spin_lock_init(&sdata->u.nan.func_lock);
1469 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1470 break;
05c914fe 1471 case NL80211_IFTYPE_AP_VLAN:
98104fde 1472 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1473 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1474 break;
05c914fe 1475 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1476 case NUM_NL80211_IFTYPES:
75636525
JB		 1477 BUG();
1478 break;
1479 }
1480
1481 ieee80211_debugfs_add_netdev(sdata);
1482}
1483
34d4bc4d
JB		 1484static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1485 enum nl80211_iftype type)
1486{
1487 struct ieee80211_local *local = sdata->local;
1488 int ret, err;
2ca27bcf
JB		 1489 enum nl80211_iftype internal_type = type;
1490 bool p2p = false;
34d4bc4d
JB		 1491
1492 ASSERT_RTNL();
1493
1494 if (!local->ops->change_interface)
1495 return -EBUSY;
1496
1497 switch (sdata->vif.type) {
1498 case NL80211_IFTYPE_AP:
1499 case NL80211_IFTYPE_STATION:
1500 case NL80211_IFTYPE_ADHOC:
239281f8 1501 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1502 /*
1503 * Could maybe also all others here?
1504 * Just not sure how that interacts
1505 * with the RX/config path e.g. for
1506 * mesh.
1507 */
1508 break;
1509 default:
1510 return -EBUSY;
1511 }
1512
1513 switch (type) {
1514 case NL80211_IFTYPE_AP:
1515 case NL80211_IFTYPE_STATION:
1516 case NL80211_IFTYPE_ADHOC:
239281f8 1517 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1518 /*
1519 * Could probably support everything
1520 * but WDS here (WDS do_open can fail
1521 * under memory pressure, which this
1522 * code isn't prepared to handle).
1523 */
1524 break;
2ca27bcf
JB		 1525 case NL80211_IFTYPE_P2P_CLIENT:
1526 p2p = true;
1527 internal_type = NL80211_IFTYPE_STATION;
1528 break;
1529 case NL80211_IFTYPE_P2P_GO:
1530 p2p = true;
1531 internal_type = NL80211_IFTYPE_AP;
1532 break;
34d4bc4d
JB		 1533 default:
1534 return -EBUSY;
1535 }
1536
2ca27bcf 1537 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1538 if (ret)
1539 return ret;
1540
1541 ieee80211_do_stop(sdata, false);
1542
f142c6b9 1543 ieee80211_teardown_sdata(sdata);
34d4bc4d 1544
2ca27bcf 1545 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1546 if (ret)
a9865538 1547 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1548
3a25a8c8
JB		 1549 /*
1550 * Ignore return value here, there's not much we can do since
1551 * the driver changed the interface type internally already.
1552 * The warnings will hopefully make driver authors fix it :-)
1553 */
a9865538 1554 ieee80211_check_queues(sdata, type);
3a25a8c8 1555
34d4bc4d
JB		 1556 ieee80211_setup_sdata(sdata, type);
1557
f142c6b9 1558 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1559 WARN(err, "type change: do_open returned %d", err);
1560
1561 return ret;
1562}
1563
f3947e2d 1564int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1565 enum nl80211_iftype type)
75636525 1566{
34d4bc4d
JB		 1567 int ret;
1568
f3947e2d
JB		 1569 ASSERT_RTNL();
1570
2ca27bcf 1571 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1572 return 0;
1573
34d4bc4d
JB		 1574 if (ieee80211_sdata_running(sdata)) {
1575 ret = ieee80211_runtime_change_iftype(sdata, type);
1576 if (ret)
1577 return ret;
1578 } else {
1579 /* Purge and reset type-dependent state. */
f142c6b9 1580 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1581 ieee80211_setup_sdata(sdata, type);
1582 }
75636525
JB		 1583
1584 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1585 if (type == NL80211_IFTYPE_STATION)
1586 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1587
1588 return 0;
f0706e82
JB		 1589}
1590
fa9029f8 1591static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1592 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1593{
1594 struct ieee80211_sub_if_data *sdata;
1595 u64 mask, start, addr, val, inc;
1596 u8 *m;
1597 u8 tmp_addr[ETH_ALEN];
1598 int i;
1599
1600 /* default ... something at least */
f142c6b9 1601 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1602
1603 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1604 local->hw.wiphy->n_addresses <= 1)
1605 return;
1606
fa9029f8
JB		 1607 mutex_lock(&local->iflist_mtx);
1608
1609 switch (type) {
1610 case NL80211_IFTYPE_MONITOR:
1611 /* doesn't matter */
1612 break;
1613 case NL80211_IFTYPE_WDS:
1614 case NL80211_IFTYPE_AP_VLAN:
1615 /* match up with an AP interface */
1616 list_for_each_entry(sdata, &local->interfaces, list) {
1617 if (sdata->vif.type != NL80211_IFTYPE_AP)
1618 continue;
f142c6b9 1619 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1620 break;
1621 }
1622 /* keep default if no AP interface present */
1623 break;
6d71117a
JB		 1624 case NL80211_IFTYPE_P2P_CLIENT:
1625 case NL80211_IFTYPE_P2P_GO:
30686bf7 1626 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1627 list_for_each_entry(sdata, &local->interfaces, list) {
1628 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1629 continue;
1630 if (!ieee80211_sdata_running(sdata))
1631 continue;
1632 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1633 goto out_unlock;
1634 }
1635 }
1636 /* otherwise fall through */
fa9029f8
JB		 1637 default:
1638 /* assign a new address if possible -- try n_addresses first */
1639 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1640 bool used = false;
1641
1642 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1643 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1644 sdata->vif.addr)) {
fa9029f8
JB		 1645 used = true;
1646 break;
1647 }
1648 }
1649
1650 if (!used) {
f142c6b9 1651 memcpy(perm_addr,
fa9029f8
JB		 1652 local->hw.wiphy->addresses[i].addr,
1653 ETH_ALEN);
1654 break;
1655 }
1656 }
1657
1658 /* try mask if available */
1659 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1660 break;
1661
1662 m = local->hw.wiphy->addr_mask;
1663 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1664 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1665 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1666
1667 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1668 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1669 pr_info("not contiguous\n");
fa9029f8
JB		 1670 break;
1671 }
1672
ac20976d
HS		 1673 /*
1674 * Pick address of existing interface in case user changed
1675 * MAC address manually, default to perm_addr.
1676 */
fa9029f8 1677 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1678 list_for_each_entry(sdata, &local->interfaces, list) {
1679 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1680 continue;
1681 m = sdata->vif.addr;
1682 break;
1683 }
fa9029f8
JB		 1684 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1685 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1686 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1687
1688 inc = 1ULL<<__ffs64(mask);
1689 val = (start & mask);
1690 addr = (start & ~mask) | (val & mask);
1691 do {
1692 bool used = false;
1693
1694 tmp_addr[5] = addr >> 0*8;
1695 tmp_addr[4] = addr >> 1*8;
1696 tmp_addr[3] = addr >> 2*8;
1697 tmp_addr[2] = addr >> 3*8;
1698 tmp_addr[1] = addr >> 4*8;
1699 tmp_addr[0] = addr >> 5*8;
1700
1701 val += inc;
1702
1703 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1704 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1705 used = true;
1706 break;
1707 }
1708 }
1709
1710 if (!used) {
f142c6b9 1711 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1712 break;
1713 }
1714 addr = (start & ~mask) | (val & mask);
1715 } while (addr != start);
1716
1717 break;
1718 }
1719
6d71117a 1720 out_unlock:
fa9029f8
JB		 1721 mutex_unlock(&local->iflist_mtx);
1722}
1723
3e122be0 1724int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1725 unsigned char name_assign_type,
84efbb84 1726 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1727 struct vif_params *params)
f0706e82 1728{
f142c6b9 1729 struct net_device *ndev = NULL;
f0706e82 1730 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1731 struct txq_info *txqi;
80a83cfc 1732 void (*if_setup)(struct net_device *dev);
75636525 1733 int ret, i;
ded81f6b 1734 int txqs = 1;
f0706e82
JB		 1735
1736 ASSERT_RTNL();
75636525 1737
708d50ed 1738 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1739 struct wireless_dev *wdev;
1740
1741 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1742 GFP_KERNEL);
1743 if (!sdata)
1744 return -ENOMEM;
1745 wdev = &sdata->wdev;
1746
1747 sdata->dev = NULL;
1748 strlcpy(sdata->name, name, IFNAMSIZ);
1749 ieee80211_assign_perm_addr(local, wdev->address, type);
1750 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1751 } else {
ba8c3d6f
FF		 1752 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1753 sizeof(void *));
1754 int txq_size = 0;
1755
1756 if (local->ops->wake_tx_queue)
1757 txq_size += sizeof(struct txq_info) +
1758 local->hw.txq_data_size;
1759
80a83cfc
MK		 1760 if (local->ops->wake_tx_queue)
1761 if_setup = ieee80211_if_setup_no_queue;
1762 else
1763 if_setup = ieee80211_if_setup;
1764
f142c6b9
JB		 1765 if (local->hw.queues >= IEEE80211_NUM_ACS)
1766 txqs = IEEE80211_NUM_ACS;
1767
ba8c3d6f 1768 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1769 name, name_assign_type,
80a83cfc 1770 if_setup, txqs, 1);
f142c6b9
JB		 1771 if (!ndev)
1772 return -ENOMEM;
1773 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1774
5a490510
JB		 1775 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1776 if (!ndev->tstats) {
1777 free_netdev(ndev);
1778 return -ENOMEM;
1779 }
1780
f142c6b9
JB		 1781 ndev->needed_headroom = local->tx_headroom +
1782 4*6 /* four MAC addresses */
1783 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1784 + 6 /* mesh */
1785 + 8 /* rfc1042/bridge tunnel */
1786 - ETH_HLEN /* ethernet hard_header_len */
1787 + IEEE80211_ENCRYPT_HEADROOM;
1788 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1789
1790 ret = dev_alloc_name(ndev, ndev->name);
1791 if (ret < 0) {
e6436be2 1792 ieee80211_if_free(ndev);
f142c6b9
JB		 1793 return ret;
1794 }
1795
1796 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1797 if (params && is_valid_ether_addr(params->macaddr))
1798 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1799 else
1800 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1801 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1802
1803 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1804 sdata = netdev_priv(ndev);
1805 ndev->ieee80211_ptr = &sdata->wdev;
1806 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1807 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1808
ba8c3d6f
FF		 1809 if (txq_size) {
1810 txqi = netdev_priv(ndev) + size;
fa962b92 1811 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1812 }
1813
f142c6b9
JB		 1814 sdata->dev = ndev;
1815 }
75636525
JB		 1816
1817 /* initialise type-independent data */
f0706e82 1818 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1819 sdata->local = local;
75636525
JB		 1820
1821 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1822 skb_queue_head_init(&sdata->fragments[i].skb_list);
1823
1824 INIT_LIST_HEAD(&sdata->key_list);
1825
164eb02d
SW		 1826 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1827 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1828 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1829 ieee80211_delayed_tailroom_dec);
97f97b1f 1830
57fbcce3 1831 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1832 struct ieee80211_supported_band *sband;
1833 sband = local->hw.wiphy->bands[i];
1834 sdata->rc_rateidx_mask[i] =
1835 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1836 if (sband) {
1837 __le16 cap;
1838 u16 *vht_rate_mask;
1839
19468413
SW		 1840 memcpy(sdata->rc_rateidx_mcs_mask[i],
1841 sband->ht_cap.mcs.rx_mask,
1842 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1843
1844 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1845 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1846 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1847 } else {
19468413
SW		 1848 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1849 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1850 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1851 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1852 }
37eb0b16 1853 }
75636525 1854
3a25a8c8
JB		 1855 ieee80211_set_default_queues(sdata);
1856
1ea6f9c0
JB		 1857 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1858 sdata->user_power_level = local->user_power_level;
1859
2475b1cc
MS		 1860 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1861
75636525
JB		 1862 /* setup type-dependent data */
1863 ieee80211_setup_sdata(sdata, type);
f0706e82 1864
f142c6b9
JB		 1865 if (ndev) {
1866 if (params) {
1867 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1868 if (type == NL80211_IFTYPE_STATION)
1869 sdata->u.mgd.use_4addr = params->use_4addr;
1870 }
9bc383de 1871
f142c6b9 1872 ndev->features |= local->hw.netdev_features;
72d78728 1873
b7ffbd7e
JB		 1874 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1875
9c22b4a3
JW		 1876 /* MTU range: 256 - 2304 */
1877 ndev->min_mtu = 256;
1878 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1879
f142c6b9
JB		 1880 ret = register_netdevice(ndev);
1881 if (ret) {
e6436be2 1882 ieee80211_if_free(ndev);
f142c6b9
JB		 1883 return ret;
1884 }
1885 }
f0706e82 1886
c771c9d8 1887 mutex_lock(&local->iflist_mtx);
79010420 1888 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1889 mutex_unlock(&local->iflist_mtx);
79010420 1890
84efbb84
JB		 1891 if (new_wdev)
1892 *new_wdev = &sdata->wdev;
f0706e82 1893
f0706e82 1894 return 0;
f0706e82
JB		 1895}
1896
f698d856 1897void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1898{
f0706e82 1899 ASSERT_RTNL();
11a843b7 1900
c771c9d8 1901 mutex_lock(&sdata->local->iflist_mtx);
75636525 1902 list_del_rcu(&sdata->list);
c771c9d8
JB		 1903 mutex_unlock(&sdata->local->iflist_mtx);
1904
75636525 1905 synchronize_rcu();
f142c6b9
JB		 1906
1907 if (sdata->dev) {
1908 unregister_netdevice(sdata->dev);
1909 } else {
1910 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1911 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1912 kfree(sdata);
1913 }
1914}
1915
1916void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1917{
1918 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1919 return;
1920 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1921}
1922
75636525 1923void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1924{
75636525 1925 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1926 LIST_HEAD(unreg_list);
f142c6b9 1927 LIST_HEAD(wdev_list);
f0706e82
JB		 1928
1929 ASSERT_RTNL();
1930
d8d9008c
JB		 1931 /* Before destroying the interfaces, make sure they're all stopped so
1932 * that the hardware is stopped. Otherwise, the driver might still be
1933 * iterating the interfaces during the shutdown, e.g. from a worker
1934 * or from RX processing or similar, and if it does so (using atomic
1935 * iteration) while we're manipulating the list, the iteration will
1936 * crash.
1937 *
1938 * After this, the hardware should be stopped and the driver should
1939 * have stopped all of its activities, so that we can do RCU-unaware
1940 * manipulations of the interface list below.
c8aa22db 1941 */
d8d9008c
JB		 1942 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1943
1944 WARN(local->open_count, "%s: open count remains %d\n",
1945 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1946
efe117ab 1947 mutex_lock(&local->iflist_mtx);
75636525
JB		 1948 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1949 list_del(&sdata->list);
c771c9d8 1950
f142c6b9
JB		 1951 if (sdata->dev)
1952 unregister_netdevice_queue(sdata->dev, &unreg_list);
1953 else
1954 list_add(&sdata->list, &wdev_list);
f0706e82 1955 }
efe117ab
ED		 1956 mutex_unlock(&local->iflist_mtx);
1957 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1958
1959 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1960 list_del(&sdata->list);
1961 cfg80211_unregister_wdev(&sdata->wdev);
1962 kfree(sdata);
1963 }
f0706e82 1964}
5cff20e6 1965
47846c9b 1966static int netdev_notify(struct notifier_block *nb,
351638e7 1967 unsigned long state, void *ptr)
47846c9b 1968{
351638e7 1969 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1970 struct ieee80211_sub_if_data *sdata;
1971
1972 if (state != NETDEV_CHANGENAME)
8bd811aa 1973 return NOTIFY_DONE;
47846c9b
JB		 1974
1975 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1976 return NOTIFY_DONE;
47846c9b
JB		 1977
1978 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1979 return NOTIFY_DONE;
47846c9b
JB		 1980
1981 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1982 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1983 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1984
1985 return NOTIFY_OK;
47846c9b
JB		 1986}
1987
1988static struct notifier_block mac80211_netdev_notifier = {
1989 .notifier_call = netdev_notify,
1990};
1991
1992int ieee80211_iface_init(void)
1993{
1994 return register_netdevice_notifier(&mac80211_netdev_notifier);
1995}
1996
1997void ieee80211_iface_exit(void)
1998{
1999 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2000}
72f15d53
MB		 2001
2002void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2003{
2004 if (sdata->vif.type == NL80211_IFTYPE_AP)
2005 atomic_inc(&sdata->u.ap.num_mcast_sta);
2006 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2007 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2008}
2009
2010void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2011{
2012 if (sdata->vif.type == NL80211_IFTYPE_AP)
2013 atomic_dec(&sdata->u.ap.num_mcast_sta);
2014 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2015 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2016}
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