projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
blk-mq: clear q->mq_ops if init fail
[linux-2.6-block.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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{
5ad11b50
EG		 79 if (__ieee80211_recalc_txpower(sdata) ||
80 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 81 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
82}
c771c9d8 83
62a40a15 84static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 85{
86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
87 return 0;
88
89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
90 return IEEE80211_CONF_CHANGE_IDLE;
91}
92
62a40a15 93static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 94{
95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
96 return 0;
97
3b24f4c6 98 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 99
100 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
101 return IEEE80211_CONF_CHANGE_IDLE;
102}
103
62a40a15
JB		 104static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
105 bool force_active)
cc45ae54 106{
1d5e1266 107 bool working, scanning, active;
cc45ae54 108 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 109
cc45ae54
JB		 110 lockdep_assert_held(&local->mtx);
111
62a40a15
JB		 112 active = force_active ||
113 !list_empty(&local->chanctx_list) ||
114 local->monitors;
cc45ae54 115
1d5e1266
JB		 116 working = !local->ops->remain_on_channel &&
117 !list_empty(&local->roc_list);
cc45ae54 118
f1e3e051
JB		 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 121
cc45ae54
JB		 122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
fd0f979a 127 if (active)
cc45ae54
JB		 128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129 else
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
133
fd0f979a 134 if (working || scanning || active)
62a40a15
JB		 135 return __ieee80211_idle_off(local);
136 return __ieee80211_idle_on(local);
137}
138
139u32 ieee80211_idle_off(struct ieee80211_local *local)
140{
141 return __ieee80211_recalc_idle(local, true);
142}
143
144void ieee80211_recalc_idle(struct ieee80211_local *local)
145{
146 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 147 if (change)
148 ieee80211_hw_config(local, change);
cc45ae54
JB		 149}
150
0d143fe1
JB		 151static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
152{
09b1426e 153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 154 return -EINVAL;
0d143fe1 155
0d143fe1
JB		 156 dev->mtu = new_mtu;
157 return 0;
158}
159
3899ba90 160static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 161 bool check_dup)
478622e8 162{
ac20976d
HS		 163 struct ieee80211_local *local = sdata->local;
164 struct ieee80211_sub_if_data *iter;
478622e8
HS		 165 u64 new, mask, tmp;
166 u8 *m;
167 int ret = 0;
168
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
170 return 0;
171
172 m = addr;
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
176
177 m = local->hw.wiphy->addr_mask;
178 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
31eba5bc
FF		 182 if (!check_dup)
183 return ret;
478622e8
HS		 184
185 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 186 list_for_each_entry(iter, &local->interfaces, list) {
187 if (iter == sdata)
478622e8
HS		 188 continue;
189
3899ba90
JL		 190 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 192 continue;
193
ac20976d 194 m = iter->vif.addr;
478622e8
HS		 195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
198
199 if ((new & ~mask) != (tmp & ~mask)) {
200 ret = -EINVAL;
201 break;
202 }
203 }
204 mutex_unlock(&local->iflist_mtx);
205
206 return ret;
207}
208
47846c9b
JB		 209static int ieee80211_change_mac(struct net_device *dev, void *addr)
210{
211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 212 struct sockaddr *sa = addr;
31eba5bc 213 bool check_dup = true;
47846c9b
JB		 214 int ret;
215
9607e6b6 216 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 217 return -EBUSY;
218
31eba5bc
FF		 219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
221 check_dup = false;
222
3899ba90 223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 224 if (ret)
225 return ret;
226
fc5f7577 227 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 228
229 if (ret == 0)
fc5f7577 230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 231
232 return ret;
233}
234
0d143fe1
JB		 235static inline int identical_mac_addr_allowed(int type1, int type2)
236{
237 return type1 == NL80211_IFTYPE_MONITOR ||
238 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 239 type1 == NL80211_IFTYPE_P2P_DEVICE ||
240 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
242 (type1 == NL80211_IFTYPE_WDS &&
243 (type2 == NL80211_IFTYPE_WDS ||
244 type2 == NL80211_IFTYPE_AP)) ||
245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
246 (type1 == NL80211_IFTYPE_AP_VLAN &&
247 (type2 == NL80211_IFTYPE_AP ||
248 type2 == NL80211_IFTYPE_AP_VLAN));
249}
250
87490f6d
JB		 251static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
252 enum nl80211_iftype iftype)
0d143fe1 253{
b4a4bf5d 254 struct ieee80211_local *local = sdata->local;
87490f6d 255 struct ieee80211_sub_if_data *nsdata;
b6a55015 256 int ret;
0d143fe1 257
87490f6d 258 ASSERT_RTNL();
0d143fe1
JB		 259
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 262 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 263 /*
264 * Only OCB and monitor mode may coexist
265 */
266 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
268 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
269 nsdata->vif.type == NL80211_IFTYPE_OCB))
270 return -EBUSY;
271
0d143fe1
JB		 272 /*
273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
276 *
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
281 */
87490f6d 282 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 283 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
284 return -EBUSY;
73da7d5b
SW		 285 /*
286 * will not add another interface while any channel
287 * switch is active.
288 */
289 if (nsdata->vif.csa_active)
290 return -EBUSY;
0d143fe1
JB		 291
292 /*
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
295 */
371a255e
JB		 296 if (!ether_addr_equal(sdata->vif.addr,
297 nsdata->vif.addr))
0d143fe1
JB		 298 continue;
299
300 /*
301 * check whether it may have the same address
302 */
87490f6d 303 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 304 nsdata->vif.type))
305 return -ENOTUNIQ;
306
307 /*
308 * can only add VLANs to enabled APs
309 */
87490f6d 310 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 311 nsdata->vif.type == NL80211_IFTYPE_AP)
312 sdata->bss = &nsdata->u.ap;
313 }
314 }
315
b6a55015
LC		 316 mutex_lock(&local->chanctx_mtx);
317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
318 mutex_unlock(&local->chanctx_mtx);
319 return ret;
87490f6d
JB		 320}
321
a9865538
JB		 322static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
323 enum nl80211_iftype iftype)
3a25a8c8
JB		 324{
325 int n_queues = sdata->local->hw.queues;
326 int i;
327
a9865538 328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 329 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
331 IEEE80211_INVAL_HW_QUEUE))
332 return -EINVAL;
333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
334 n_queues))
335 return -EINVAL;
336 }
3a25a8c8
JB		 337 }
338
a9865538
JB		 339 if ((iftype != NL80211_IFTYPE_AP &&
340 iftype != NL80211_IFTYPE_P2P_GO &&
341 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
344 return 0;
345 }
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
348 return -EINVAL;
349
350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
351 return -EINVAL;
352
353 return 0;
354}
355
85416a4f
CL		 356void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
357 const int offset)
358{
359 struct ieee80211_local *local = sdata->local;
360 u32 flags = sdata->u.mntr_flags;
361
362#define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
365 } while (0)
366
367 ADJUST(FCSFAIL, fcsfail);
368 ADJUST(PLCPFAIL, plcpfail);
369 ADJUST(CONTROL, control);
370 ADJUST(CONTROL, pspoll);
371 ADJUST(OTHER_BSS, other_bss);
372
373#undef ADJUST
374}
375
3a25a8c8
JB		 376static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
377{
378 struct ieee80211_local *local = sdata->local;
379 int i;
380
381 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 384 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 385 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 386 else
387 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 388 }
389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
390}
391
3c3e21e7 392int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 393{
394 struct ieee80211_sub_if_data *sdata;
8b305780 395 int ret;
4b6f1dd6 396
30686bf7 397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 398 return 0;
399
8b305780 400 ASSERT_RTNL();
685fb72b 401
4b6f1dd6 402 if (local->monitor_sdata)
8b305780 403 return 0;
4b6f1dd6
JB		 404
405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 406 if (!sdata)
407 return -ENOMEM;
4b6f1dd6
JB		 408
409 /* set up data */
410 sdata->local = local;
411 sdata->vif.type = NL80211_IFTYPE_MONITOR;
412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
413 wiphy_name(local->hw.wiphy));
34171dc0 414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 415
2475b1cc
MS		 416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
417
3a25a8c8
JB		 418 ieee80211_set_default_queues(sdata);
419
4b6f1dd6
JB		 420 ret = drv_add_interface(local, sdata);
421 if (WARN_ON(ret)) {
422 /* ok .. stupid driver, it asked for this! */
423 kfree(sdata);
8b305780 424 return ret;
4b6f1dd6
JB		 425 }
426
a9865538 427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 428 if (ret) {
429 kfree(sdata);
8b305780 430 return ret;
3a25a8c8
JB		 431 }
432
fab57a6c
JB		 433 mutex_lock(&local->iflist_mtx);
434 rcu_assign_pointer(local->monitor_sdata, sdata);
435 mutex_unlock(&local->iflist_mtx);
436
34a3740d 437 mutex_lock(&local->mtx);
4bf88530 438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 439 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 440 mutex_unlock(&local->mtx);
55de908a 441 if (ret) {
fab57a6c 442 mutex_lock(&local->iflist_mtx);
0c2bef46 443 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 444 mutex_unlock(&local->iflist_mtx);
445 synchronize_net();
55de908a
JB		 446 drv_remove_interface(local, sdata);
447 kfree(sdata);
8b305780 448 return ret;
55de908a
JB		 449 }
450
8b305780 451 return 0;
4b6f1dd6
JB		 452}
453
3c3e21e7 454void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 455{
456 struct ieee80211_sub_if_data *sdata;
457
30686bf7 458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 459 return;
460
8b305780
JB		 461 ASSERT_RTNL();
462
685fb72b 463 mutex_lock(&local->iflist_mtx);
4b6f1dd6 464
685fb72b
JB		 465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 467 if (!sdata) {
468 mutex_unlock(&local->iflist_mtx);
469 return;
470 }
4b6f1dd6 471
0c2bef46 472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 473 mutex_unlock(&local->iflist_mtx);
474
4b6f1dd6
JB		 475 synchronize_net();
476
34a3740d 477 mutex_lock(&local->mtx);
55de908a 478 ieee80211_vif_release_channel(sdata);
34a3740d 479 mutex_unlock(&local->mtx);
55de908a 480
4b6f1dd6
JB		 481 drv_remove_interface(local, sdata);
482
483 kfree(sdata);
484}
485
34d4bc4d
JB		 486/*
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
490 */
f142c6b9 491int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 492{
f142c6b9
JB		 493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
87490f6d
JB		 495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
497 u32 changed = 0;
498 int res;
499 u32 hw_reconf_flags = 0;
500
0d143fe1
JB		 501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 return -ENOLINK;
505 break;
665c93a9
JB		 506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
508
0d143fe1
JB		 509 if (!sdata->bss)
510 return -ENOLINK;
665c93a9 511
4e141dad 512 mutex_lock(&local->mtx);
0d143fe1 513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 514 mutex_unlock(&local->mtx);
665c93a9
JB		 515
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
1351c5d3
JB		 522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
2967e031 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 526
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
531
0d143fe1 532 break;
665c93a9 533 }
0d143fe1
JB		 534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
536 break;
537 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
f142c6b9 541 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 542 case NL80211_IFTYPE_OCB:
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:
592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
593 local->cooked_mntrs++;
594 break;
595 }
596
31eba5bc
FF		 597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
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
f142c6b9
JB		 644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
645 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 646 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 647
c405c629
JB		 648 switch (sdata->vif.type) {
649 case NL80211_IFTYPE_STATION:
650 case NL80211_IFTYPE_ADHOC:
651 case NL80211_IFTYPE_AP:
652 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 653 case NL80211_IFTYPE_OCB:
0d143fe1 654 netif_carrier_off(dev);
c405c629 655 break;
1411af15 656 case NL80211_IFTYPE_WDS:
f142c6b9 657 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 658 break;
c405c629 659 default:
a2310824
JB		 660 /* not reached */
661 WARN_ON(1);
c405c629 662 }
59034591
EP		 663
664 /*
cec66283 665 * Set default queue parameters so drivers don't
59034591 666 * need to initialise the hardware if the hardware
cec66283
JB		 667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
59034591 669 */
cec66283
JB		 670 ieee80211_set_wmm_default(sdata, true,
671 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 672 }
673
2d2080c3
JB		 674 set_bit(SDATA_STATE_RUNNING, &sdata->state);
675
0d143fe1
JB		 676 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
677 /* Create STA entry for the WDS peer */
678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
679 GFP_KERNEL);
680 if (!sta) {
681 res = -ENOMEM;
682 goto err_del_interface;
683 }
684
83d5cc01
JB		 685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 688
689 res = sta_info_insert(sta);
690 if (res) {
691 /* STA has been freed */
692 goto err_del_interface;
693 }
1be7fe8d
BJ		 694
695 rate_control_rate_init(sta);
1411af15 696 netif_carrier_on(dev);
f142c6b9
JB		 697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
698 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 699 }
700
0d143fe1
JB		 701 /*
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
705 */
706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
707 atomic_inc(&local->iff_allmultis);
708
34d4bc4d
JB		 709 if (coming_up)
710 local->open_count++;
711
59034591 712 if (hw_reconf_flags)
e8975581 713 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 714
4a733ef1 715 ieee80211_recalc_ps(local);
965bedad 716
2b436312
JB		 717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev);
721 } else if (dev) {
2b730daa
JB		 722 unsigned long flags;
723 int n_acs = IEEE80211_NUM_ACS;
724 int ac;
725
726 if (local->hw.queues < IEEE80211_NUM_ACS)
727 n_acs = 1;
728
729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
733 for (ac = 0; ac < n_acs; ac++) {
734 int ac_queue = sdata->vif.hw_queue[ac];
735
736 if (local->queue_stop_reasons[ac_queue] == 0 &&
737 skb_queue_empty(&local->pending[ac_queue]))
738 netif_start_subqueue(dev, ac);
739 }
740 }
741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
742 }
0d143fe1
JB		 743
744 return 0;
745 err_del_interface:
7b7eab6f 746 drv_remove_interface(local, sdata);
0d143fe1 747 err_stop:
24487981
JB		 748 if (!local->open_count)
749 drv_stop(local);
0d143fe1
JB		 750 err_del_bss:
751 sdata->bss = NULL;
4e141dad
MK		 752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
753 mutex_lock(&local->mtx);
0d143fe1 754 list_del(&sdata->u.vlan.list);
4e141dad
MK		 755 mutex_unlock(&local->mtx);
756 }
4d6c36fa 757 /* might already be clear but that doesn't matter */
2d2080c3 758 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 759 return res;
760}
761
34d4bc4d 762static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 763{
764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 765 int err;
766
767 /* fail early if user set an invalid address */
2fcf2824 768 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 769 return -EADDRNOTAVAIL;
770
771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
772 if (err)
773 return err;
774
f142c6b9 775 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 776}
777
778static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
779 bool going_down)
780{
0d143fe1 781 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 782 unsigned long flags;
783 struct sk_buff *skb, *tmp;
e8975581 784 u32 hw_reconf_flags = 0;
09f4114e 785 int i, flushed;
397a7a24 786 struct ps_data *ps;
d2859df5 787 struct cfg80211_chan_def chandef;
46238845 788 bool cancel_scan;
0d143fe1 789
c29acf20
RM		 790 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
791
46238845
JB		 792 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
793 if (cancel_scan)
352ffad6
BC		 794 ieee80211_scan_cancel(local);
795
0d143fe1
JB		 796 /*
797 * Stop TX on this interface first.
798 */
f142c6b9
JB		 799 if (sdata->dev)
800 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 801
c8f994ee 802 ieee80211_roc_purge(local, sdata);
af6b6374 803
8ffcc704
EG		 804 switch (sdata->vif.type) {
805 case NL80211_IFTYPE_STATION:
572078be 806 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 807 break;
808 case NL80211_IFTYPE_ADHOC:
cd7760e6 809 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 810 break;
811 case NL80211_IFTYPE_AP:
812 cancel_work_sync(&sdata->u.ap.request_smps_work);
813 break;
814 default:
815 break;
816 }
cd7760e6 817
0d143fe1
JB		 818 /*
819 * Remove all stations associated with this interface.
820 *
821 * This must be done before calling ops->remove_interface()
822 * because otherwise we can later invoke ops->sta_notify()
823 * whenever the STAs are removed, and that invalidates driver
824 * assumptions about always getting a vif pointer that is valid
825 * (because if we remove a STA after ops->remove_interface()
826 * the driver will have removed the vif info already!)
827 *
5eb8f4d7
JB		 828 * In WDS mode a station must exist here and be flushed, for
829 * AP_VLANs stations may exist since there's nothing else that
830 * would have removed them, but in other modes there shouldn't
831 * be any stations.
0d143fe1 832 */
d34ba216 833 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 834 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
835 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
836 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 837
df140465 838 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 839 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
840 atomic_dec(&local->iff_allmultis);
841
7be5086d 842 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 843 local->fif_pspoll--;
7be5086d
JB		 844 local->fif_probe_req--;
845 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
846 local->fif_probe_req--;
847 }
e3b90ca2 848
f142c6b9
JB		 849 if (sdata->dev) {
850 netif_addr_lock_bh(sdata->dev);
851 spin_lock_bh(&local->filter_lock);
852 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
853 sdata->dev->addr_len);
854 spin_unlock_bh(&local->filter_lock);
855 netif_addr_unlock_bh(sdata->dev);
f142c6b9 856 }
3ac64bee 857
7cbf0ba5
VN		 858 del_timer_sync(&local->dynamic_ps_timer);
859 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 860
04ecd257 861 cancel_work_sync(&sdata->recalc_smps);
dbd72850 862 sdata_lock(sdata);
59af6928 863 mutex_lock(&local->mtx);
73da7d5b 864 sdata->vif.csa_active = false;
0c21e632
LC		 865 if (sdata->vif.type == NL80211_IFTYPE_STATION)
866 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 867 if (sdata->csa_block_tx) {
868 ieee80211_wake_vif_queues(local, sdata,
869 IEEE80211_QUEUE_STOP_REASON_CSA);
870 sdata->csa_block_tx = false;
871 }
59af6928 872 mutex_unlock(&local->mtx);
dbd72850 873 sdata_unlock(sdata);
59af6928 874
73da7d5b 875 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 876
164eb02d
SW		 877 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
878
879 if (sdata->wdev.cac_started) {
d2859df5 880 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 881 WARN_ON(local->suspended);
34a3740d 882 mutex_lock(&local->mtx);
164eb02d 883 ieee80211_vif_release_channel(sdata);
34a3740d 884 mutex_unlock(&local->mtx);
d2859df5
JD		 885 cfg80211_cac_event(sdata->dev, &chandef,
886 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 887 GFP_KERNEL);
888 }
889
0d143fe1
JB		 890 /* APs need special treatment */
891 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 892 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 893
894 /* down all dependent devices, that is VLANs */
57c9fff3 895 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 896 u.vlan.list)
897 dev_close(vlan->dev);
898 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 899 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
900 /* remove all packets in parent bc_buf pointing to this dev */
901 ps = &sdata->bss->ps;
902
903 spin_lock_irqsave(&ps->bc_buf.lock, flags);
904 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
905 if (skb->dev == sdata->dev) {
906 __skb_unlink(skb, &ps->bc_buf);
907 local->total_ps_buffered--;
908 ieee80211_free_txskb(&local->hw, skb);
909 }
910 }
911 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 912 }
913
34d4bc4d
JB		 914 if (going_down)
915 local->open_count--;
0d143fe1
JB		 916
917 switch (sdata->vif.type) {
918 case NL80211_IFTYPE_AP_VLAN:
4e141dad 919 mutex_lock(&local->mtx);
0d143fe1 920 list_del(&sdata->u.vlan.list);
4e141dad 921 mutex_unlock(&local->mtx);
0c2bef46 922 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 923 /* see comment in the default case below */
924 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 925 /* no need to tell driver */
926 break;
927 case NL80211_IFTYPE_MONITOR:
928 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
929 local->cooked_mntrs--;
930 break;
931 }
932
933 local->monitors--;
e8975581 934 if (local->monitors == 0) {
0869aea0
JB		 935 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
936 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 937 }
0d143fe1 938
85416a4f 939 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 940 break;
f142c6b9
JB		 941 case NL80211_IFTYPE_P2P_DEVICE:
942 /* relies on synchronize_rcu() below */
0c2bef46 943 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 944 /* fall through */
0d143fe1 945 default:
0b7dff4f 946 cancel_work_sync(&sdata->work);
35f20c14
JB		 947 /*
948 * When we get here, the interface is marked down.
7907c7d3 949 * Free the remaining keys, if there are any
10b68487
FF		 950 * (which can happen in AP mode if userspace sets
951 * keys before the interface is operating, and maybe
952 * also in WDS mode)
75de9113 953 *
7907c7d3
JB		 954 * Force the key freeing to always synchronize_net()
955 * to wait for the RX path in case it is using this
10b68487 956 * interface enqueuing frames at this very time on
75de9113 957 * another CPU.
35f20c14 958 */
7907c7d3 959 ieee80211_free_keys(sdata, true);
1861b845 960 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 961 }
962
963 sdata->bss = NULL;
964
5061b0c2
JB		 965 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
966 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
967 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
968 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
969 if (info->control.vif == &sdata->vif) {
970 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 971 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 972 }
973 }
974 }
975 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 976
ba8c3d6f
FF		 977 if (sdata->vif.txq) {
978 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
979
2a58d42c 980 spin_lock_bh(&txqi->queue.lock);
ba8c3d6f 981 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
f2ac7e30 982 txqi->byte_cnt = 0;
2a58d42c
MK		 983 spin_unlock_bh(&txqi->queue.lock);
984
ba8c3d6f
FF		 985 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
986 }
987
b2c0958b
JB		 988 if (local->open_count == 0)
989 ieee80211_clear_tx_pending(local);
990
991 /*
992 * If the interface goes down while suspended, presumably because
993 * the device was unplugged and that happens before our resume,
994 * then the driver is already unconfigured and the remainder of
995 * this function isn't needed.
996 * XXX: what about WoWLAN? If the device has software state, e.g.
997 * memory allocated, it might expect teardown commands from
998 * mac80211 here?
999 */
1000 if (local->suspended) {
1001 WARN_ON(local->wowlan);
1002 WARN_ON(rtnl_dereference(local->monitor_sdata));
1003 return;
1004 }
1005
1006 switch (sdata->vif.type) {
1007 case NL80211_IFTYPE_AP_VLAN:
1008 break;
1009 case NL80211_IFTYPE_MONITOR:
1010 if (local->monitors == 0)
1011 ieee80211_del_virtual_monitor(local);
1012
1013 mutex_lock(&local->mtx);
1014 ieee80211_recalc_idle(local);
1015 mutex_unlock(&local->mtx);
31eba5bc
FF		 1016
1017 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1018 break;
1019
1020 /* fall through */
b2c0958b
JB		 1021 default:
1022 if (going_down)
1023 drv_remove_interface(local, sdata);
1024 }
1025
4a733ef1 1026 ieee80211_recalc_ps(local);
b2c0958b 1027
46238845
JB		 1028 if (cancel_scan)
1029 flush_delayed_work(&local->scan_work);
1030
b2c0958b
JB		 1031 if (local->open_count == 0) {
1032 ieee80211_stop_device(local);
1033
1034 /* no reconfiguring after stop! */
1035 return;
1036 }
1037
1038 /* do after stop to avoid reconfiguring when we stop anyway */
1039 ieee80211_configure_filter(local);
1040 ieee80211_hw_config(local, hw_reconf_flags);
1041
1042 if (local->monitors == local->open_count)
075e0847 1043 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1044}
1045
1046static int ieee80211_stop(struct net_device *dev)
1047{
1048 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1049
1050 ieee80211_do_stop(sdata, true);
5061b0c2 1051
0d143fe1
JB		 1052 return 0;
1053}
1054
1055static void ieee80211_set_multicast_list(struct net_device *dev)
1056{
0d143fe1 1057 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1058 struct ieee80211_local *local = sdata->local;
df140465 1059 int allmulti, sdata_allmulti;
0d143fe1
JB		 1060
1061 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1062 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1063
1064 if (allmulti != sdata_allmulti) {
1065 if (dev->flags & IFF_ALLMULTI)
1066 atomic_inc(&local->iff_allmultis);
1067 else
1068 atomic_dec(&local->iff_allmultis);
1069 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1070 }
1071
3b8d81e0 1072 spin_lock_bh(&local->filter_lock);
22bedad3 1073 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1074 spin_unlock_bh(&local->filter_lock);
3ac64bee 1075 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1076}
1077
75636525
JB		 1078/*
1079 * Called when the netdev is removed or, by the code below, before
1080 * the interface type changes.
1081 */
f142c6b9 1082static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1083{
1084 int i;
1085
75636525 1086 /* free extra data */
7907c7d3 1087 ieee80211_free_keys(sdata, false);
75636525 1088
aee14ceb
JM		 1089 ieee80211_debugfs_remove_netdev(sdata);
1090
f0706e82 1091 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1092 __skb_queue_purge(&sdata->fragments[i].skb_list);
1093 sdata->fragment_next = 0;
11a843b7 1094
b9dcf712
JB		 1095 if (ieee80211_vif_is_mesh(&sdata->vif))
1096 mesh_rmc_free(sdata);
f0706e82
JB		 1097}
1098
f142c6b9
JB		 1099static void ieee80211_uninit(struct net_device *dev)
1100{
1101 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1102}
1103
cf0277e7 1104static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1105 struct sk_buff *skb,
99932d4f
DB		 1106 void *accel_priv,
1107 select_queue_fallback_t fallback)
cf0277e7
JB		 1108{
1109 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1110}
1111
5a490510
JB		 1112static struct rtnl_link_stats64 *
1113ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1114{
1115 int i;
1116
1117 for_each_possible_cpu(i) {
1118 const struct pcpu_sw_netstats *tstats;
1119 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1120 unsigned int start;
1121
1122 tstats = per_cpu_ptr(dev->tstats, i);
1123
1124 do {
1125 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1126 rx_packets = tstats->rx_packets;
1127 tx_packets = tstats->tx_packets;
1128 rx_bytes = tstats->rx_bytes;
1129 tx_bytes = tstats->tx_bytes;
1130 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1131
1132 stats->rx_packets += rx_packets;
1133 stats->tx_packets += tx_packets;
1134 stats->rx_bytes += rx_bytes;
1135 stats->tx_bytes += tx_bytes;
1136 }
1137
1138 return stats;
1139}
1140
587e729e
JB		 1141static const struct net_device_ops ieee80211_dataif_ops = {
1142 .ndo_open = ieee80211_open,
1143 .ndo_stop = ieee80211_stop,
f142c6b9 1144 .ndo_uninit = ieee80211_uninit,
587e729e 1145 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1146 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1147 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1148 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1149 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1150 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1151};
1152
cf0277e7 1153static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1154 struct sk_buff *skb,
99932d4f
DB		 1155 void *accel_priv,
1156 select_queue_fallback_t fallback)
cf0277e7
JB		 1157{
1158 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1159 struct ieee80211_local *local = sdata->local;
1160 struct ieee80211_hdr *hdr;
1161 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1162
32c5057b 1163 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1164 return 0;
1165
1166 if (skb->len < 4 ||
b49bb574 1167 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1168 return 0; /* doesn't matter, frame will be dropped */
1169
b49bb574 1170 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1171
00e96dec 1172 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1173}
1174
587e729e
JB		 1175static const struct net_device_ops ieee80211_monitorif_ops = {
1176 .ndo_open = ieee80211_open,
1177 .ndo_stop = ieee80211_stop,
f142c6b9 1178 .ndo_uninit = ieee80211_uninit,
587e729e 1179 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1180 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1181 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1182 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1183 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1184 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1185};
1186
5a490510
JB		 1187static void ieee80211_if_free(struct net_device *dev)
1188{
1189 free_percpu(dev->tstats);
1190 free_netdev(dev);
1191}
1192
587e729e
JB		 1193static void ieee80211_if_setup(struct net_device *dev)
1194{
1195 ether_setup(dev);
550fd08c 1196 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1197 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1198 dev->destructor = ieee80211_if_free;
587e729e
JB		 1199}
1200
1fa57d01
JB		 1201static void ieee80211_iface_work(struct work_struct *work)
1202{
1203 struct ieee80211_sub_if_data *sdata =
1204 container_of(work, struct ieee80211_sub_if_data, work);
1205 struct ieee80211_local *local = sdata->local;
1206 struct sk_buff *skb;
344eec67 1207 struct sta_info *sta;
c1475ca9 1208 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1209 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1210
1211 if (!ieee80211_sdata_running(sdata))
1212 return;
1213
fc58c47e 1214 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1215 return;
1216
4afaff17 1217 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1218 return;
1219
1220 /* first process frames */
1221 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1222 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1223
c1475ca9
JB		 1224 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1225 ra_tid = (void *)&skb->cb;
1226 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1227 ra_tid->tid);
1228 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1229 ra_tid = (void *)&skb->cb;
1230 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1231 ra_tid->tid);
08cf42e8
MK		 1232 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1233 rx_agg = (void *)&skb->cb;
1234 mutex_lock(&local->sta_mtx);
1235 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1236 if (sta)
08cf42e8 1237 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1238 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1239 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1240 false, true);
08cf42e8
MK		 1241 mutex_unlock(&local->sta_mtx);
1242 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1243 rx_agg = (void *)&skb->cb;
1244 mutex_lock(&local->sta_mtx);
1245 sta = sta_info_get_bss(sdata, rx_agg->addr);
1246 if (sta)
1247 __ieee80211_stop_rx_ba_session(sta,
1248 rx_agg->tid,
1249 WLAN_BACK_RECIPIENT, 0,
1250 false);
1251 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1252 } else if (ieee80211_is_action(mgmt->frame_control) &&
1253 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1254 int len = skb->len;
bed7ee6e 1255
a93e3644 1256 mutex_lock(&local->sta_mtx);
875ae5f6 1257 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1258 if (sta) {
1259 switch (mgmt->u.action.u.addba_req.action_code) {
1260 case WLAN_ACTION_ADDBA_REQ:
1261 ieee80211_process_addba_request(
1262 local, sta, mgmt, len);
1263 break;
1264 case WLAN_ACTION_ADDBA_RESP:
1265 ieee80211_process_addba_resp(local, sta,
1266 mgmt, len);
1267 break;
1268 case WLAN_ACTION_DELBA:
1269 ieee80211_process_delba(sdata, sta,
1270 mgmt, len);
1271 break;
1272 default:
1273 WARN_ON(1);
1274 break;
1275 }
1276 }
a93e3644 1277 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1278 } else if (ieee80211_is_action(mgmt->frame_control) &&
1279 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1280 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1281 case WLAN_VHT_ACTION_GROUPID_MGMT:
1282 ieee80211_process_mu_groups(sdata, mgmt);
1283 break;
1284 default:
1285 WARN_ON(1);
1286 break;
1287 }
344eec67
JB		 1288 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1289 struct ieee80211_hdr *hdr = (void *)mgmt;
1290 /*
1291 * So the frame isn't mgmt, but frame_control
1292 * is at the right place anyway, of course, so
1293 * the if statement is correct.
1294 *
1295 * Warn if we have other data frame types here,
1296 * they must not get here.
1297 */
1298 WARN_ON(hdr->frame_control &
1299 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1300 WARN_ON(!(hdr->seq_ctrl &
1301 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1302 /*
1303 * This was a fragment of a frame, received while
1304 * a block-ack session was active. That cannot be
1305 * right, so terminate the session.
1306 */
a93e3644 1307 mutex_lock(&local->sta_mtx);
875ae5f6 1308 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1309 if (sta) {
1310 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1311 IEEE80211_QOS_CTL_TID_MASK;
1312
1313 __ieee80211_stop_rx_ba_session(
1314 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1315 WLAN_REASON_QSTA_REQUIRE_SETUP,
1316 true);
344eec67 1317 }
a93e3644 1318 mutex_unlock(&local->sta_mtx);
bed7ee6e 1319 } else switch (sdata->vif.type) {
1fa57d01
JB		 1320 case NL80211_IFTYPE_STATION:
1321 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1322 break;
1323 case NL80211_IFTYPE_ADHOC:
1324 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1325 break;
1326 case NL80211_IFTYPE_MESH_POINT:
1327 if (!ieee80211_vif_is_mesh(&sdata->vif))
1328 break;
1329 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1330 break;
1331 default:
1332 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1333 break;
1334 }
36b3a628
JB		 1335
1336 kfree_skb(skb);
1fa57d01
JB		 1337 }
1338
1339 /* then other type-dependent work */
1340 switch (sdata->vif.type) {
1341 case NL80211_IFTYPE_STATION:
1342 ieee80211_sta_work(sdata);
1343 break;
1344 case NL80211_IFTYPE_ADHOC:
1345 ieee80211_ibss_work(sdata);
1346 break;
1347 case NL80211_IFTYPE_MESH_POINT:
1348 if (!ieee80211_vif_is_mesh(&sdata->vif))
1349 break;
1350 ieee80211_mesh_work(sdata);
1351 break;
239281f8
RL		 1352 case NL80211_IFTYPE_OCB:
1353 ieee80211_ocb_work(sdata);
1354 break;
1fa57d01
JB		 1355 default:
1356 break;
1357 }
1358}
1359
04ecd257
JB		 1360static void ieee80211_recalc_smps_work(struct work_struct *work)
1361{
1362 struct ieee80211_sub_if_data *sdata =
1363 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1364
1365 ieee80211_recalc_smps(sdata);
1366}
1fa57d01 1367
75636525
JB		 1368/*
1369 * Helper function to initialise an interface to a specific type.
1370 */
1371static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1372 enum nl80211_iftype type)
f0706e82 1373{
239281f8
RL		 1374 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1375 0xff, 0xff, 0xff};
1376
75636525
JB		 1377 /* clear type-dependent union */
1378 memset(&sdata->u, 0, sizeof(sdata->u));
1379
1380 /* and set some type-dependent values */
1381 sdata->vif.type = type;
2ca27bcf 1382 sdata->vif.p2p = false;
60719ffd 1383 sdata->wdev.iftype = type;
75636525 1384
a621fa4d
JB		 1385 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1386 sdata->control_port_no_encrypt = false;
2475b1cc 1387 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1388 sdata->vif.bss_conf.idle = true;
a621fa4d 1389
b53be792
SW		 1390 sdata->noack_map = 0;
1391
f142c6b9
JB		 1392 /* only monitor/p2p-device differ */
1393 if (sdata->dev) {
1394 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1395 sdata->dev->type = ARPHRD_ETHER;
1396 }
75636525 1397
35f20c14 1398 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1399 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1400 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1401 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1402 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1403 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1404
75636525 1405 switch (type) {
2ca27bcf
JB		 1406 case NL80211_IFTYPE_P2P_GO:
1407 type = NL80211_IFTYPE_AP;
1408 sdata->vif.type = type;
1409 sdata->vif.p2p = true;
1410 /* fall through */
05c914fe 1411 case NL80211_IFTYPE_AP:
d012a605 1412 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1413 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1414 INIT_WORK(&sdata->u.ap.request_smps_work,
1415 ieee80211_request_smps_ap_work);
ad2d223a 1416 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1417 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1418 break;
2ca27bcf
JB		 1419 case NL80211_IFTYPE_P2P_CLIENT:
1420 type = NL80211_IFTYPE_STATION;
1421 sdata->vif.type = type;
1422 sdata->vif.p2p = true;
1423 /* fall through */
05c914fe 1424 case NL80211_IFTYPE_STATION:
ad2d223a 1425 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1426 ieee80211_sta_setup_sdata(sdata);
472dbc45 1427 break;
6e0bd6c3 1428 case NL80211_IFTYPE_OCB:
239281f8
RL		 1429 sdata->vif.bss_conf.bssid = bssid_wildcard;
1430 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1431 break;
46900298 1432 case NL80211_IFTYPE_ADHOC:
ad2d223a 1433 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1434 ieee80211_ibss_setup_sdata(sdata);
1435 break;
05c914fe 1436 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1437 if (ieee80211_vif_is_mesh(&sdata->vif))
1438 ieee80211_mesh_init_sdata(sdata);
1439 break;
05c914fe 1440 case NL80211_IFTYPE_MONITOR:
75636525 1441 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1442 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1443 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1444 MONITOR_FLAG_OTHER_BSS;
1445 break;
05c914fe 1446 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1447 sdata->vif.bss_conf.bssid = NULL;
1448 break;
05c914fe 1449 case NL80211_IFTYPE_AP_VLAN:
98104fde 1450 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1451 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1452 break;
05c914fe 1453 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1454 case NUM_NL80211_IFTYPES:
75636525
JB		 1455 BUG();
1456 break;
1457 }
1458
1459 ieee80211_debugfs_add_netdev(sdata);
1460}
1461
34d4bc4d
JB		 1462static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1463 enum nl80211_iftype type)
1464{
1465 struct ieee80211_local *local = sdata->local;
1466 int ret, err;
2ca27bcf
JB		 1467 enum nl80211_iftype internal_type = type;
1468 bool p2p = false;
34d4bc4d
JB		 1469
1470 ASSERT_RTNL();
1471
1472 if (!local->ops->change_interface)
1473 return -EBUSY;
1474
1475 switch (sdata->vif.type) {
1476 case NL80211_IFTYPE_AP:
1477 case NL80211_IFTYPE_STATION:
1478 case NL80211_IFTYPE_ADHOC:
239281f8 1479 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1480 /*
1481 * Could maybe also all others here?
1482 * Just not sure how that interacts
1483 * with the RX/config path e.g. for
1484 * mesh.
1485 */
1486 break;
1487 default:
1488 return -EBUSY;
1489 }
1490
1491 switch (type) {
1492 case NL80211_IFTYPE_AP:
1493 case NL80211_IFTYPE_STATION:
1494 case NL80211_IFTYPE_ADHOC:
239281f8 1495 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1496 /*
1497 * Could probably support everything
1498 * but WDS here (WDS do_open can fail
1499 * under memory pressure, which this
1500 * code isn't prepared to handle).
1501 */
1502 break;
2ca27bcf
JB		 1503 case NL80211_IFTYPE_P2P_CLIENT:
1504 p2p = true;
1505 internal_type = NL80211_IFTYPE_STATION;
1506 break;
1507 case NL80211_IFTYPE_P2P_GO:
1508 p2p = true;
1509 internal_type = NL80211_IFTYPE_AP;
1510 break;
34d4bc4d
JB		 1511 default:
1512 return -EBUSY;
1513 }
1514
2ca27bcf 1515 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1516 if (ret)
1517 return ret;
1518
1519 ieee80211_do_stop(sdata, false);
1520
f142c6b9 1521 ieee80211_teardown_sdata(sdata);
34d4bc4d 1522
2ca27bcf 1523 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1524 if (ret)
a9865538 1525 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1526
3a25a8c8
JB		 1527 /*
1528 * Ignore return value here, there's not much we can do since
1529 * the driver changed the interface type internally already.
1530 * The warnings will hopefully make driver authors fix it :-)
1531 */
a9865538 1532 ieee80211_check_queues(sdata, type);
3a25a8c8 1533
34d4bc4d
JB		 1534 ieee80211_setup_sdata(sdata, type);
1535
f142c6b9 1536 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1537 WARN(err, "type change: do_open returned %d", err);
1538
1539 return ret;
1540}
1541
f3947e2d 1542int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1543 enum nl80211_iftype type)
75636525 1544{
34d4bc4d
JB		 1545 int ret;
1546
f3947e2d
JB		 1547 ASSERT_RTNL();
1548
2ca27bcf 1549 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1550 return 0;
1551
34d4bc4d
JB		 1552 if (ieee80211_sdata_running(sdata)) {
1553 ret = ieee80211_runtime_change_iftype(sdata, type);
1554 if (ret)
1555 return ret;
1556 } else {
1557 /* Purge and reset type-dependent state. */
f142c6b9 1558 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1559 ieee80211_setup_sdata(sdata, type);
1560 }
75636525
JB		 1561
1562 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1563 if (type == NL80211_IFTYPE_STATION)
1564 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1565
1566 return 0;
f0706e82
JB		 1567}
1568
fa9029f8 1569static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1570 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1571{
1572 struct ieee80211_sub_if_data *sdata;
1573 u64 mask, start, addr, val, inc;
1574 u8 *m;
1575 u8 tmp_addr[ETH_ALEN];
1576 int i;
1577
1578 /* default ... something at least */
f142c6b9 1579 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1580
1581 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1582 local->hw.wiphy->n_addresses <= 1)
1583 return;
1584
fa9029f8
JB		 1585 mutex_lock(&local->iflist_mtx);
1586
1587 switch (type) {
1588 case NL80211_IFTYPE_MONITOR:
1589 /* doesn't matter */
1590 break;
1591 case NL80211_IFTYPE_WDS:
1592 case NL80211_IFTYPE_AP_VLAN:
1593 /* match up with an AP interface */
1594 list_for_each_entry(sdata, &local->interfaces, list) {
1595 if (sdata->vif.type != NL80211_IFTYPE_AP)
1596 continue;
f142c6b9 1597 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1598 break;
1599 }
1600 /* keep default if no AP interface present */
1601 break;
6d71117a
JB		 1602 case NL80211_IFTYPE_P2P_CLIENT:
1603 case NL80211_IFTYPE_P2P_GO:
30686bf7 1604 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1605 list_for_each_entry(sdata, &local->interfaces, list) {
1606 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1607 continue;
1608 if (!ieee80211_sdata_running(sdata))
1609 continue;
1610 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1611 goto out_unlock;
1612 }
1613 }
1614 /* otherwise fall through */
fa9029f8
JB		 1615 default:
1616 /* assign a new address if possible -- try n_addresses first */
1617 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1618 bool used = false;
1619
1620 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1621 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1622 sdata->vif.addr)) {
fa9029f8
JB		 1623 used = true;
1624 break;
1625 }
1626 }
1627
1628 if (!used) {
f142c6b9 1629 memcpy(perm_addr,
fa9029f8
JB		 1630 local->hw.wiphy->addresses[i].addr,
1631 ETH_ALEN);
1632 break;
1633 }
1634 }
1635
1636 /* try mask if available */
1637 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1638 break;
1639
1640 m = local->hw.wiphy->addr_mask;
1641 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1642 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1643 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1644
1645 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1646 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1647 pr_info("not contiguous\n");
fa9029f8
JB		 1648 break;
1649 }
1650
ac20976d
HS		 1651 /*
1652 * Pick address of existing interface in case user changed
1653 * MAC address manually, default to perm_addr.
1654 */
fa9029f8 1655 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1656 list_for_each_entry(sdata, &local->interfaces, list) {
1657 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1658 continue;
1659 m = sdata->vif.addr;
1660 break;
1661 }
fa9029f8
JB		 1662 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1663 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1664 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1665
1666 inc = 1ULL<<__ffs64(mask);
1667 val = (start & mask);
1668 addr = (start & ~mask) | (val & mask);
1669 do {
1670 bool used = false;
1671
1672 tmp_addr[5] = addr >> 0*8;
1673 tmp_addr[4] = addr >> 1*8;
1674 tmp_addr[3] = addr >> 2*8;
1675 tmp_addr[2] = addr >> 3*8;
1676 tmp_addr[1] = addr >> 4*8;
1677 tmp_addr[0] = addr >> 5*8;
1678
1679 val += inc;
1680
1681 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1682 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1683 used = true;
1684 break;
1685 }
1686 }
1687
1688 if (!used) {
f142c6b9 1689 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1690 break;
1691 }
1692 addr = (start & ~mask) | (val & mask);
1693 } while (addr != start);
1694
1695 break;
1696 }
1697
6d71117a 1698 out_unlock:
fa9029f8
JB		 1699 mutex_unlock(&local->iflist_mtx);
1700}
1701
3e122be0 1702int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1703 unsigned char name_assign_type,
84efbb84 1704 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1705 struct vif_params *params)
f0706e82 1706{
f142c6b9 1707 struct net_device *ndev = NULL;
f0706e82 1708 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1709 struct txq_info *txqi;
75636525 1710 int ret, i;
ded81f6b 1711 int txqs = 1;
f0706e82
JB		 1712
1713 ASSERT_RTNL();
75636525 1714
f142c6b9
JB		 1715 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1716 struct wireless_dev *wdev;
1717
1718 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1719 GFP_KERNEL);
1720 if (!sdata)
1721 return -ENOMEM;
1722 wdev = &sdata->wdev;
1723
1724 sdata->dev = NULL;
1725 strlcpy(sdata->name, name, IFNAMSIZ);
1726 ieee80211_assign_perm_addr(local, wdev->address, type);
1727 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1728 } else {
ba8c3d6f
FF		 1729 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1730 sizeof(void *));
1731 int txq_size = 0;
1732
1733 if (local->ops->wake_tx_queue)
1734 txq_size += sizeof(struct txq_info) +
1735 local->hw.txq_data_size;
1736
f142c6b9
JB		 1737 if (local->hw.queues >= IEEE80211_NUM_ACS)
1738 txqs = IEEE80211_NUM_ACS;
1739
ba8c3d6f 1740 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1741 name, name_assign_type,
c835a677 1742 ieee80211_if_setup, txqs, 1);
f142c6b9
JB		 1743 if (!ndev)
1744 return -ENOMEM;
1745 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1746
5a490510
JB		 1747 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1748 if (!ndev->tstats) {
1749 free_netdev(ndev);
1750 return -ENOMEM;
1751 }
1752
f142c6b9
JB		 1753 ndev->needed_headroom = local->tx_headroom +
1754 4*6 /* four MAC addresses */
1755 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1756 + 6 /* mesh */
1757 + 8 /* rfc1042/bridge tunnel */
1758 - ETH_HLEN /* ethernet hard_header_len */
1759 + IEEE80211_ENCRYPT_HEADROOM;
1760 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1761
1762 ret = dev_alloc_name(ndev, ndev->name);
1763 if (ret < 0) {
e6436be2 1764 ieee80211_if_free(ndev);
f142c6b9
JB		 1765 return ret;
1766 }
1767
1768 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1769 if (params && is_valid_ether_addr(params->macaddr))
1770 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1771 else
1772 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1773 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1774
1775 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1776 sdata = netdev_priv(ndev);
1777 ndev->ieee80211_ptr = &sdata->wdev;
1778 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1779 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1780
ba8c3d6f
FF		 1781 if (txq_size) {
1782 txqi = netdev_priv(ndev) + size;
1783 ieee80211_init_tx_queue(sdata, NULL, txqi, 0);
1784 }
1785
f142c6b9
JB		 1786 sdata->dev = ndev;
1787 }
75636525
JB		 1788
1789 /* initialise type-independent data */
f0706e82 1790 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1791 sdata->local = local;
75636525
JB		 1792
1793 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1794 skb_queue_head_init(&sdata->fragments[i].skb_list);
1795
1796 INIT_LIST_HEAD(&sdata->key_list);
1797
164eb02d
SW		 1798 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1799 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1800 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1801 ieee80211_delayed_tailroom_dec);
97f97b1f 1802
37eb0b16
JM		 1803 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1804 struct ieee80211_supported_band *sband;
1805 sband = local->hw.wiphy->bands[i];
1806 sdata->rc_rateidx_mask[i] =
1807 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1808 if (sband) {
1809 __le16 cap;
1810 u16 *vht_rate_mask;
1811
19468413
SW		 1812 memcpy(sdata->rc_rateidx_mcs_mask[i],
1813 sband->ht_cap.mcs.rx_mask,
1814 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1815
1816 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1817 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1818 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1819 } else {
19468413
SW		 1820 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1821 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1822 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1823 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1824 }
37eb0b16 1825 }
75636525 1826
3a25a8c8
JB		 1827 ieee80211_set_default_queues(sdata);
1828
1ea6f9c0
JB		 1829 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1830 sdata->user_power_level = local->user_power_level;
1831
2475b1cc
MS		 1832 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1833
75636525
JB		 1834 /* setup type-dependent data */
1835 ieee80211_setup_sdata(sdata, type);
f0706e82 1836
f142c6b9
JB		 1837 if (ndev) {
1838 if (params) {
1839 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1840 if (type == NL80211_IFTYPE_STATION)
1841 sdata->u.mgd.use_4addr = params->use_4addr;
1842 }
9bc383de 1843
f142c6b9 1844 ndev->features |= local->hw.netdev_features;
72d78728 1845
b7ffbd7e
JB		 1846 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1847
f142c6b9
JB		 1848 ret = register_netdevice(ndev);
1849 if (ret) {
e6436be2 1850 ieee80211_if_free(ndev);
f142c6b9
JB		 1851 return ret;
1852 }
1853 }
f0706e82 1854
c771c9d8 1855 mutex_lock(&local->iflist_mtx);
79010420 1856 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1857 mutex_unlock(&local->iflist_mtx);
79010420 1858
84efbb84
JB		 1859 if (new_wdev)
1860 *new_wdev = &sdata->wdev;
f0706e82 1861
f0706e82 1862 return 0;
f0706e82
JB		 1863}
1864
f698d856 1865void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1866{
f0706e82 1867 ASSERT_RTNL();
11a843b7 1868
c771c9d8 1869 mutex_lock(&sdata->local->iflist_mtx);
75636525 1870 list_del_rcu(&sdata->list);
c771c9d8
JB		 1871 mutex_unlock(&sdata->local->iflist_mtx);
1872
75636525 1873 synchronize_rcu();
f142c6b9
JB		 1874
1875 if (sdata->dev) {
1876 unregister_netdevice(sdata->dev);
1877 } else {
1878 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1879 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1880 kfree(sdata);
1881 }
1882}
1883
1884void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1885{
1886 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1887 return;
1888 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1889}
1890
75636525 1891void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1892{
75636525 1893 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1894 LIST_HEAD(unreg_list);
f142c6b9 1895 LIST_HEAD(wdev_list);
f0706e82
JB		 1896
1897 ASSERT_RTNL();
1898
d8d9008c
JB		 1899 /* Before destroying the interfaces, make sure they're all stopped so
1900 * that the hardware is stopped. Otherwise, the driver might still be
1901 * iterating the interfaces during the shutdown, e.g. from a worker
1902 * or from RX processing or similar, and if it does so (using atomic
1903 * iteration) while we're manipulating the list, the iteration will
1904 * crash.
1905 *
1906 * After this, the hardware should be stopped and the driver should
1907 * have stopped all of its activities, so that we can do RCU-unaware
1908 * manipulations of the interface list below.
c8aa22db 1909 */
d8d9008c
JB		 1910 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1911
1912 WARN(local->open_count, "%s: open count remains %d\n",
1913 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1914
efe117ab 1915 mutex_lock(&local->iflist_mtx);
75636525
JB		 1916 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1917 list_del(&sdata->list);
c771c9d8 1918
f142c6b9
JB		 1919 if (sdata->dev)
1920 unregister_netdevice_queue(sdata->dev, &unreg_list);
1921 else
1922 list_add(&sdata->list, &wdev_list);
f0706e82 1923 }
efe117ab
ED		 1924 mutex_unlock(&local->iflist_mtx);
1925 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1926
1927 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1928 list_del(&sdata->list);
1929 cfg80211_unregister_wdev(&sdata->wdev);
1930 kfree(sdata);
1931 }
f0706e82 1932}
5cff20e6 1933
47846c9b 1934static int netdev_notify(struct notifier_block *nb,
351638e7 1935 unsigned long state, void *ptr)
47846c9b 1936{
351638e7 1937 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1938 struct ieee80211_sub_if_data *sdata;
1939
1940 if (state != NETDEV_CHANGENAME)
8bd811aa 1941 return NOTIFY_DONE;
47846c9b
JB		 1942
1943 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1944 return NOTIFY_DONE;
47846c9b
JB		 1945
1946 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1947 return NOTIFY_DONE;
47846c9b
JB		 1948
1949 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1950 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1951 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1952
1953 return NOTIFY_OK;
47846c9b
JB		 1954}
1955
1956static struct notifier_block mac80211_netdev_notifier = {
1957 .notifier_call = netdev_notify,
1958};
1959
1960int ieee80211_iface_init(void)
1961{
1962 return register_netdevice_notifier(&mac80211_netdev_notifier);
1963}
1964
1965void ieee80211_iface_exit(void)
1966{
1967 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1968}
Linux 6.x block layer and io_uring tree(s)