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Merge remote-tracking branch 'mfd/for-mfd-next'
[deliverable/linux.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
0d143fe1
JB		 153static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
154{
09b1426e 155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 156 return -EINVAL;
0d143fe1 157
0d143fe1
JB		 158 dev->mtu = new_mtu;
159 return 0;
160}
161
3899ba90 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 163 bool check_dup)
478622e8 164{
ac20976d
HS		 165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
478622e8
HS		 167 u64 new, mask, tmp;
168 u8 *m;
169 int ret = 0;
170
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
172 return 0;
173
174 m = addr;
175 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183
31eba5bc
FF		 184 if (!check_dup)
185 return ret;
478622e8
HS		 186
187 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
478622e8
HS		 190 continue;
191
3899ba90 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 194 continue;
195
ac20976d 196 m = iter->vif.addr;
478622e8
HS		 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206 mutex_unlock(&local->iflist_mtx);
207
208 return ret;
209}
210
47846c9b
JB		 211static int ieee80211_change_mac(struct net_device *dev, void *addr)
212{
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 214 struct sockaddr *sa = addr;
31eba5bc 215 bool check_dup = true;
47846c9b
JB		 216 int ret;
217
9607e6b6 218 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 219 return -EBUSY;
220
31eba5bc 221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 222 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 223 check_dup = false;
224
3899ba90 225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 226 if (ret)
227 return ret;
228
fc5f7577 229 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 230
231 if (ret == 0)
fc5f7577 232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 233
234 return ret;
235}
236
0d143fe1
JB		 237static inline int identical_mac_addr_allowed(int type1, int type2)
238{
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
251}
252
87490f6d
JB		 253static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
0d143fe1 255{
b4a4bf5d 256 struct ieee80211_local *local = sdata->local;
87490f6d 257 struct ieee80211_sub_if_data *nsdata;
b6a55015 258 int ret;
0d143fe1 259
87490f6d 260 ASSERT_RTNL();
0d143fe1
JB		 261
262 /* we hold the RTNL here so can safely walk the list */
263 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 264 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 265 /*
266 * Only OCB and monitor mode may coexist
267 */
268 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
269 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
270 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
271 nsdata->vif.type == NL80211_IFTYPE_OCB))
272 return -EBUSY;
273
0d143fe1
JB		 274 /*
275 * Allow only a single IBSS interface to be up at any
276 * time. This is restricted because beacon distribution
277 * cannot work properly if both are in the same IBSS.
278 *
279 * To remove this restriction we'd have to disallow them
280 * from setting the same SSID on different IBSS interfaces
281 * belonging to the same hardware. Then, however, we're
282 * faced with having to adopt two different TSF timers...
283 */
87490f6d 284 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 285 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
286 return -EBUSY;
73da7d5b
SW		 287 /*
288 * will not add another interface while any channel
289 * switch is active.
290 */
291 if (nsdata->vif.csa_active)
292 return -EBUSY;
0d143fe1
JB		 293
294 /*
295 * The remaining checks are only performed for interfaces
296 * with the same MAC address.
297 */
371a255e
JB		 298 if (!ether_addr_equal(sdata->vif.addr,
299 nsdata->vif.addr))
0d143fe1
JB		 300 continue;
301
302 /*
303 * check whether it may have the same address
304 */
87490f6d 305 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 306 nsdata->vif.type))
307 return -ENOTUNIQ;
308
309 /*
310 * can only add VLANs to enabled APs
311 */
87490f6d 312 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 313 nsdata->vif.type == NL80211_IFTYPE_AP)
314 sdata->bss = &nsdata->u.ap;
315 }
316 }
317
b6a55015
LC		 318 mutex_lock(&local->chanctx_mtx);
319 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
320 mutex_unlock(&local->chanctx_mtx);
321 return ret;
87490f6d
JB		 322}
323
a9865538
JB		 324static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
325 enum nl80211_iftype iftype)
3a25a8c8
JB		 326{
327 int n_queues = sdata->local->hw.queues;
328 int i;
329
a9865538 330 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 331 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
332 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
333 IEEE80211_INVAL_HW_QUEUE))
334 return -EINVAL;
335 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
336 n_queues))
337 return -EINVAL;
338 }
3a25a8c8
JB		 339 }
340
a9865538
JB		 341 if ((iftype != NL80211_IFTYPE_AP &&
342 iftype != NL80211_IFTYPE_P2P_GO &&
343 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 344 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 345 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
346 return 0;
347 }
348
349 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
350 return -EINVAL;
351
352 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
353 return -EINVAL;
354
355 return 0;
356}
357
85416a4f
CL		 358void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
359 const int offset)
360{
361 struct ieee80211_local *local = sdata->local;
d8212184 362 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 363
364#define ADJUST(_f, _s) do { \
365 if (flags & MONITOR_FLAG_##_f) \
366 local->fif_##_s += offset; \
367 } while (0)
368
369 ADJUST(FCSFAIL, fcsfail);
370 ADJUST(PLCPFAIL, plcpfail);
371 ADJUST(CONTROL, control);
372 ADJUST(CONTROL, pspoll);
373 ADJUST(OTHER_BSS, other_bss);
374
375#undef ADJUST
376}
377
3a25a8c8
JB		 378static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
379{
380 struct ieee80211_local *local = sdata->local;
381 int i;
382
383 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 384 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 385 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 386 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 387 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 388 else
389 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 390 }
391 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
392}
393
3c3e21e7 394int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 395{
396 struct ieee80211_sub_if_data *sdata;
8b305780 397 int ret;
4b6f1dd6 398
30686bf7 399 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 400 return 0;
401
8b305780 402 ASSERT_RTNL();
685fb72b 403
4b6f1dd6 404 if (local->monitor_sdata)
8b305780 405 return 0;
4b6f1dd6
JB		 406
407 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 408 if (!sdata)
409 return -ENOMEM;
4b6f1dd6
JB		 410
411 /* set up data */
412 sdata->local = local;
413 sdata->vif.type = NL80211_IFTYPE_MONITOR;
414 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
415 wiphy_name(local->hw.wiphy));
34171dc0 416 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 417
2475b1cc
MS		 418 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
419
3a25a8c8
JB		 420 ieee80211_set_default_queues(sdata);
421
4b6f1dd6
JB		 422 ret = drv_add_interface(local, sdata);
423 if (WARN_ON(ret)) {
424 /* ok .. stupid driver, it asked for this! */
425 kfree(sdata);
8b305780 426 return ret;
4b6f1dd6
JB		 427 }
428
a9865538 429 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 430 if (ret) {
431 kfree(sdata);
8b305780 432 return ret;
3a25a8c8
JB		 433 }
434
fab57a6c
JB		 435 mutex_lock(&local->iflist_mtx);
436 rcu_assign_pointer(local->monitor_sdata, sdata);
437 mutex_unlock(&local->iflist_mtx);
438
34a3740d 439 mutex_lock(&local->mtx);
4bf88530 440 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 441 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 442 mutex_unlock(&local->mtx);
55de908a 443 if (ret) {
fab57a6c 444 mutex_lock(&local->iflist_mtx);
0c2bef46 445 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 446 mutex_unlock(&local->iflist_mtx);
447 synchronize_net();
55de908a
JB		 448 drv_remove_interface(local, sdata);
449 kfree(sdata);
8b305780 450 return ret;
55de908a
JB		 451 }
452
42bd20d9
AE		 453 skb_queue_head_init(&sdata->skb_queue);
454 INIT_WORK(&sdata->work, ieee80211_iface_work);
455
8b305780 456 return 0;
4b6f1dd6
JB		 457}
458
3c3e21e7 459void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 460{
461 struct ieee80211_sub_if_data *sdata;
462
30686bf7 463 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 464 return;
465
8b305780
JB		 466 ASSERT_RTNL();
467
685fb72b 468 mutex_lock(&local->iflist_mtx);
4b6f1dd6 469
685fb72b
JB		 470 sdata = rcu_dereference_protected(local->monitor_sdata,
471 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 472 if (!sdata) {
473 mutex_unlock(&local->iflist_mtx);
474 return;
475 }
4b6f1dd6 476
0c2bef46 477 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 478 mutex_unlock(&local->iflist_mtx);
479
4b6f1dd6
JB		 480 synchronize_net();
481
34a3740d 482 mutex_lock(&local->mtx);
55de908a 483 ieee80211_vif_release_channel(sdata);
34a3740d 484 mutex_unlock(&local->mtx);
55de908a 485
4b6f1dd6
JB		 486 drv_remove_interface(local, sdata);
487
488 kfree(sdata);
489}
490
34d4bc4d
JB		 491/*
492 * NOTE: Be very careful when changing this function, it must NOT return
493 * an error on interface type changes that have been pre-checked, so most
494 * checks should be in ieee80211_check_concurrent_iface.
495 */
f142c6b9 496int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 497{
f142c6b9
JB		 498 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
499 struct net_device *dev = wdev->netdev;
87490f6d
JB		 500 struct ieee80211_local *local = sdata->local;
501 struct sta_info *sta;
502 u32 changed = 0;
503 int res;
504 u32 hw_reconf_flags = 0;
505
0d143fe1
JB		 506 switch (sdata->vif.type) {
507 case NL80211_IFTYPE_WDS:
508 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
509 return -ENOLINK;
510 break;
665c93a9
JB		 511 case NL80211_IFTYPE_AP_VLAN: {
512 struct ieee80211_sub_if_data *master;
513
0d143fe1
JB		 514 if (!sdata->bss)
515 return -ENOLINK;
665c93a9 516
4e141dad 517 mutex_lock(&local->mtx);
0d143fe1 518 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 519 mutex_unlock(&local->mtx);
665c93a9
JB		 520
521 master = container_of(sdata->bss,
522 struct ieee80211_sub_if_data, u.ap);
523 sdata->control_port_protocol =
524 master->control_port_protocol;
525 sdata->control_port_no_encrypt =
526 master->control_port_no_encrypt;
1351c5d3
JB		 527 sdata->vif.cab_queue = master->vif.cab_queue;
528 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
529 sizeof(sdata->vif.hw_queue));
2967e031 530 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 531
532 mutex_lock(&local->key_mtx);
533 sdata->crypto_tx_tailroom_needed_cnt +=
534 master->crypto_tx_tailroom_needed_cnt;
535 mutex_unlock(&local->key_mtx);
536
0d143fe1 537 break;
665c93a9 538 }
0d143fe1
JB		 539 case NL80211_IFTYPE_AP:
540 sdata->bss = &sdata->u.ap;
541 break;
542 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 543 case NL80211_IFTYPE_STATION:
544 case NL80211_IFTYPE_MONITOR:
545 case NL80211_IFTYPE_ADHOC:
f142c6b9 546 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 547 case NL80211_IFTYPE_OCB:
0d143fe1
JB		 548 /* no special treatment */
549 break;
550 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 551 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 552 case NL80211_IFTYPE_P2P_CLIENT:
553 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 554 /* cannot happen */
555 WARN_ON(1);
556 break;
557 }
558
559 if (local->open_count == 0) {
24487981 560 res = drv_start(local);
0d143fe1
JB		 561 if (res)
562 goto err_del_bss;
e8975581
JB		 563 /* we're brought up, everything changes */
564 hw_reconf_flags = ~0;
1f87f7d3 565 ieee80211_led_radio(local, true);
67408c8c
JB		 566 ieee80211_mod_tpt_led_trig(local,
567 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 568 }
569
570 /*
bf533e0b
JB		 571 * Copy the hopefully now-present MAC address to
572 * this interface, if it has the special null one.
0d143fe1 573 */
f142c6b9 574 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 575 memcpy(dev->dev_addr,
576 local->hw.wiphy->perm_addr,
577 ETH_ALEN);
578 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
579
580 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 581 res = -EADDRNOTAVAIL;
582 goto err_stop;
0adc23f5 583 }
0d143fe1
JB		 584 }
585
0d143fe1
JB		 586 switch (sdata->vif.type) {
587 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 588 /* no need to tell driver, but set carrier and chanctx */
589 if (rtnl_dereference(sdata->bss->beacon)) {
590 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 591 netif_carrier_on(dev);
4d76d21b 592 } else {
3edaf3e6 593 netif_carrier_off(dev);
4d76d21b 594 }
0d143fe1
JB		 595 break;
596 case NL80211_IFTYPE_MONITOR:
d8212184 597 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 598 local->cooked_mntrs++;
599 break;
600 }
601
d8212184 602 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 603 res = drv_add_interface(local, sdata);
604 if (res)
605 goto err_stop;
606 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 607 res = ieee80211_add_virtual_monitor(local);
608 if (res)
609 goto err_stop;
610 }
611
0d143fe1
JB		 612 /* must be before the call to ieee80211_configure_filter */
613 local->monitors++;
e8975581 614 if (local->monitors == 1) {
0869aea0
JB		 615 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
616 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 617 }
0d143fe1 618
85416a4f 619 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 620 ieee80211_configure_filter(local);
801d929c
FF		 621 mutex_lock(&local->mtx);
622 ieee80211_recalc_idle(local);
623 mutex_unlock(&local->mtx);
53e9b1de
DG		 624
625 netif_carrier_on(dev);
0d143fe1 626 break;
0d143fe1 627 default:
34d4bc4d 628 if (coming_up) {
075e0847
JB		 629 ieee80211_del_virtual_monitor(local);
630
7b7eab6f 631 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 632 if (res)
633 goto err_stop;
a9865538
JB		 634 res = ieee80211_check_queues(sdata,
635 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 636 if (res)
637 goto err_del_interface;
34d4bc4d 638 }
0d143fe1 639
29cbe68c 640 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 641 local->fif_pspoll++;
7be5086d 642 local->fif_probe_req++;
e3b90ca2 643
e3b90ca2 644 ieee80211_configure_filter(local);
7be5086d
JB		 645 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
646 local->fif_probe_req++;
a3c9aa51 647 }
e3b90ca2 648
f142c6b9
JB		 649 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
650 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 651 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 652
c405c629
JB		 653 switch (sdata->vif.type) {
654 case NL80211_IFTYPE_STATION:
655 case NL80211_IFTYPE_ADHOC:
656 case NL80211_IFTYPE_AP:
657 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 658 case NL80211_IFTYPE_OCB:
0d143fe1 659 netif_carrier_off(dev);
c405c629 660 break;
1411af15 661 case NL80211_IFTYPE_WDS:
f142c6b9 662 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 663 break;
c405c629 664 default:
a2310824
JB		 665 /* not reached */
666 WARN_ON(1);
c405c629 667 }
59034591
EP		 668
669 /*
cec66283 670 * Set default queue parameters so drivers don't
59034591 671 * need to initialise the hardware if the hardware
cec66283
JB		 672 * doesn't start up with sane defaults.
673 * Enable QoS for anything but station interfaces.
59034591 674 */
cec66283
JB		 675 ieee80211_set_wmm_default(sdata, true,
676 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 677 }
678
2d2080c3
JB		 679 set_bit(SDATA_STATE_RUNNING, &sdata->state);
680
0d143fe1
JB		 681 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
682 /* Create STA entry for the WDS peer */
683 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
684 GFP_KERNEL);
685 if (!sta) {
686 res = -ENOMEM;
687 goto err_del_interface;
688 }
689
83d5cc01
JB		 690 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
691 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
692 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 693
694 res = sta_info_insert(sta);
695 if (res) {
696 /* STA has been freed */
697 goto err_del_interface;
698 }
1be7fe8d
BJ		 699
700 rate_control_rate_init(sta);
1411af15 701 netif_carrier_on(dev);
f142c6b9
JB		 702 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
703 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 704 }
705
0d143fe1
JB		 706 /*
707 * set_multicast_list will be invoked by the networking core
708 * which will check whether any increments here were done in
709 * error and sync them down to the hardware as filter flags.
710 */
711 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
712 atomic_inc(&local->iff_allmultis);
713
34d4bc4d
JB		 714 if (coming_up)
715 local->open_count++;
716
59034591 717 if (hw_reconf_flags)
e8975581 718 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 719
4a733ef1 720 ieee80211_recalc_ps(local);
965bedad 721
2b436312
JB		 722 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
723 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
724 /* XXX: for AP_VLAN, actually track AP queues */
725 netif_tx_start_all_queues(dev);
726 } else if (dev) {
2b730daa
JB		 727 unsigned long flags;
728 int n_acs = IEEE80211_NUM_ACS;
729 int ac;
730
731 if (local->hw.queues < IEEE80211_NUM_ACS)
732 n_acs = 1;
733
734 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
735 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
736 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
737 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
738 for (ac = 0; ac < n_acs; ac++) {
739 int ac_queue = sdata->vif.hw_queue[ac];
740
741 if (local->queue_stop_reasons[ac_queue] == 0 &&
742 skb_queue_empty(&local->pending[ac_queue]))
743 netif_start_subqueue(dev, ac);
744 }
745 }
746 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
747 }
0d143fe1
JB		 748
749 return 0;
750 err_del_interface:
7b7eab6f 751 drv_remove_interface(local, sdata);
0d143fe1 752 err_stop:
24487981
JB		 753 if (!local->open_count)
754 drv_stop(local);
0d143fe1
JB		 755 err_del_bss:
756 sdata->bss = NULL;
4e141dad
MK		 757 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
758 mutex_lock(&local->mtx);
0d143fe1 759 list_del(&sdata->u.vlan.list);
4e141dad
MK		 760 mutex_unlock(&local->mtx);
761 }
4d6c36fa 762 /* might already be clear but that doesn't matter */
2d2080c3 763 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 764 return res;
765}
766
34d4bc4d 767static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 768{
769 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 770 int err;
771
772 /* fail early if user set an invalid address */
2fcf2824 773 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 774 return -EADDRNOTAVAIL;
775
776 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
777 if (err)
778 return err;
779
f142c6b9 780 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 781}
782
783static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
784 bool going_down)
785{
0d143fe1 786 struct ieee80211_local *local = sdata->local;
fa962b92 787 struct fq *fq = &local->fq;
5061b0c2
JB		 788 unsigned long flags;
789 struct sk_buff *skb, *tmp;
e8975581 790 u32 hw_reconf_flags = 0;
09f4114e 791 int i, flushed;
397a7a24 792 struct ps_data *ps;
d2859df5 793 struct cfg80211_chan_def chandef;
46238845 794 bool cancel_scan;
0d143fe1 795
c29acf20
RM		 796 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
797
46238845
JB		 798 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
799 if (cancel_scan)
352ffad6
BC		 800 ieee80211_scan_cancel(local);
801
0d143fe1
JB		 802 /*
803 * Stop TX on this interface first.
804 */
f142c6b9
JB		 805 if (sdata->dev)
806 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 807
c8f994ee 808 ieee80211_roc_purge(local, sdata);
af6b6374 809
8ffcc704
EG		 810 switch (sdata->vif.type) {
811 case NL80211_IFTYPE_STATION:
572078be 812 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 813 break;
814 case NL80211_IFTYPE_ADHOC:
cd7760e6 815 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 816 break;
817 case NL80211_IFTYPE_AP:
818 cancel_work_sync(&sdata->u.ap.request_smps_work);
819 break;
820 default:
821 break;
822 }
cd7760e6 823
0d143fe1
JB		 824 /*
825 * Remove all stations associated with this interface.
826 *
827 * This must be done before calling ops->remove_interface()
828 * because otherwise we can later invoke ops->sta_notify()
829 * whenever the STAs are removed, and that invalidates driver
830 * assumptions about always getting a vif pointer that is valid
831 * (because if we remove a STA after ops->remove_interface()
832 * the driver will have removed the vif info already!)
833 *
5eb8f4d7
JB		 834 * In WDS mode a station must exist here and be flushed, for
835 * AP_VLANs stations may exist since there's nothing else that
836 * would have removed them, but in other modes there shouldn't
837 * be any stations.
0d143fe1 838 */
d34ba216 839 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 840 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
841 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
842 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 843
df140465 844 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 845 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
846 atomic_dec(&local->iff_allmultis);
847
7be5086d 848 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 849 local->fif_pspoll--;
7be5086d
JB		 850 local->fif_probe_req--;
851 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
852 local->fif_probe_req--;
853 }
e3b90ca2 854
f142c6b9
JB		 855 if (sdata->dev) {
856 netif_addr_lock_bh(sdata->dev);
857 spin_lock_bh(&local->filter_lock);
858 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
859 sdata->dev->addr_len);
860 spin_unlock_bh(&local->filter_lock);
861 netif_addr_unlock_bh(sdata->dev);
f142c6b9 862 }
3ac64bee 863
7cbf0ba5
VN		 864 del_timer_sync(&local->dynamic_ps_timer);
865 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 866
04ecd257 867 cancel_work_sync(&sdata->recalc_smps);
dbd72850 868 sdata_lock(sdata);
59af6928 869 mutex_lock(&local->mtx);
73da7d5b 870 sdata->vif.csa_active = false;
0c21e632
LC		 871 if (sdata->vif.type == NL80211_IFTYPE_STATION)
872 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 873 if (sdata->csa_block_tx) {
874 ieee80211_wake_vif_queues(local, sdata,
875 IEEE80211_QUEUE_STOP_REASON_CSA);
876 sdata->csa_block_tx = false;
877 }
59af6928 878 mutex_unlock(&local->mtx);
dbd72850 879 sdata_unlock(sdata);
59af6928 880
73da7d5b 881 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 882
164eb02d
SW		 883 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
884
885 if (sdata->wdev.cac_started) {
d2859df5 886 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 887 WARN_ON(local->suspended);
34a3740d 888 mutex_lock(&local->mtx);
164eb02d 889 ieee80211_vif_release_channel(sdata);
34a3740d 890 mutex_unlock(&local->mtx);
d2859df5
JD		 891 cfg80211_cac_event(sdata->dev, &chandef,
892 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 893 GFP_KERNEL);
894 }
895
0d143fe1
JB		 896 /* APs need special treatment */
897 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 898 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 899
900 /* down all dependent devices, that is VLANs */
57c9fff3 901 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 902 u.vlan.list)
903 dev_close(vlan->dev);
904 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 905 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
906 /* remove all packets in parent bc_buf pointing to this dev */
907 ps = &sdata->bss->ps;
908
909 spin_lock_irqsave(&ps->bc_buf.lock, flags);
910 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
911 if (skb->dev == sdata->dev) {
912 __skb_unlink(skb, &ps->bc_buf);
913 local->total_ps_buffered--;
914 ieee80211_free_txskb(&local->hw, skb);
915 }
916 }
917 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 918 }
919
34d4bc4d
JB		 920 if (going_down)
921 local->open_count--;
0d143fe1
JB		 922
923 switch (sdata->vif.type) {
924 case NL80211_IFTYPE_AP_VLAN:
4e141dad 925 mutex_lock(&local->mtx);
0d143fe1 926 list_del(&sdata->u.vlan.list);
4e141dad 927 mutex_unlock(&local->mtx);
0c2bef46 928 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 929 /* see comment in the default case below */
930 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 931 /* no need to tell driver */
932 break;
933 case NL80211_IFTYPE_MONITOR:
d8212184 934 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 935 local->cooked_mntrs--;
936 break;
937 }
938
939 local->monitors--;
e8975581 940 if (local->monitors == 0) {
0869aea0
JB		 941 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
942 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 943 }
0d143fe1 944
85416a4f 945 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 946 break;
f142c6b9
JB		 947 case NL80211_IFTYPE_P2P_DEVICE:
948 /* relies on synchronize_rcu() below */
0c2bef46 949 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 950 /* fall through */
0d143fe1 951 default:
0b7dff4f 952 cancel_work_sync(&sdata->work);
35f20c14
JB		 953 /*
954 * When we get here, the interface is marked down.
7907c7d3 955 * Free the remaining keys, if there are any
10b68487
FF		 956 * (which can happen in AP mode if userspace sets
957 * keys before the interface is operating, and maybe
958 * also in WDS mode)
75de9113 959 *
7907c7d3
JB		 960 * Force the key freeing to always synchronize_net()
961 * to wait for the RX path in case it is using this
10b68487 962 * interface enqueuing frames at this very time on
75de9113 963 * another CPU.
35f20c14 964 */
7907c7d3 965 ieee80211_free_keys(sdata, true);
1861b845 966 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 967 }
968
969 sdata->bss = NULL;
970
5061b0c2
JB		 971 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
972 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
973 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
974 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
975 if (info->control.vif == &sdata->vif) {
976 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 977 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 978 }
979 }
980 }
981 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 982
ba8c3d6f
FF		 983 if (sdata->vif.txq) {
984 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
985
fa962b92
MK		 986 spin_lock_bh(&fq->lock);
987 ieee80211_txq_purge(local, txqi);
988 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 989 }
990
b2c0958b
JB		 991 if (local->open_count == 0)
992 ieee80211_clear_tx_pending(local);
993
994 /*
995 * If the interface goes down while suspended, presumably because
996 * the device was unplugged and that happens before our resume,
997 * then the driver is already unconfigured and the remainder of
998 * this function isn't needed.
999 * XXX: what about WoWLAN? If the device has software state, e.g.
1000 * memory allocated, it might expect teardown commands from
1001 * mac80211 here?
1002 */
1003 if (local->suspended) {
1004 WARN_ON(local->wowlan);
1005 WARN_ON(rtnl_dereference(local->monitor_sdata));
1006 return;
1007 }
1008
1009 switch (sdata->vif.type) {
1010 case NL80211_IFTYPE_AP_VLAN:
1011 break;
1012 case NL80211_IFTYPE_MONITOR:
1013 if (local->monitors == 0)
1014 ieee80211_del_virtual_monitor(local);
1015
1016 mutex_lock(&local->mtx);
1017 ieee80211_recalc_idle(local);
1018 mutex_unlock(&local->mtx);
31eba5bc 1019
d8212184 1020 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1021 break;
1022
1023 /* fall through */
b2c0958b
JB		 1024 default:
1025 if (going_down)
1026 drv_remove_interface(local, sdata);
1027 }
1028
4a733ef1 1029 ieee80211_recalc_ps(local);
b2c0958b 1030
46238845
JB		 1031 if (cancel_scan)
1032 flush_delayed_work(&local->scan_work);
1033
b2c0958b
JB		 1034 if (local->open_count == 0) {
1035 ieee80211_stop_device(local);
1036
1037 /* no reconfiguring after stop! */
1038 return;
1039 }
1040
1041 /* do after stop to avoid reconfiguring when we stop anyway */
1042 ieee80211_configure_filter(local);
1043 ieee80211_hw_config(local, hw_reconf_flags);
1044
1045 if (local->monitors == local->open_count)
075e0847 1046 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1047}
1048
1049static int ieee80211_stop(struct net_device *dev)
1050{
1051 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1052
1053 ieee80211_do_stop(sdata, true);
5061b0c2 1054
0d143fe1
JB		 1055 return 0;
1056}
1057
1058static void ieee80211_set_multicast_list(struct net_device *dev)
1059{
0d143fe1 1060 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1061 struct ieee80211_local *local = sdata->local;
df140465 1062 int allmulti, sdata_allmulti;
0d143fe1
JB		 1063
1064 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1065 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1066
1067 if (allmulti != sdata_allmulti) {
1068 if (dev->flags & IFF_ALLMULTI)
1069 atomic_inc(&local->iff_allmultis);
1070 else
1071 atomic_dec(&local->iff_allmultis);
1072 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1073 }
1074
3b8d81e0 1075 spin_lock_bh(&local->filter_lock);
22bedad3 1076 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1077 spin_unlock_bh(&local->filter_lock);
3ac64bee 1078 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1079}
1080
75636525
JB		 1081/*
1082 * Called when the netdev is removed or, by the code below, before
1083 * the interface type changes.
1084 */
f142c6b9 1085static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1086{
1087 int i;
1088
75636525 1089 /* free extra data */
7907c7d3 1090 ieee80211_free_keys(sdata, false);
75636525 1091
aee14ceb
JM		 1092 ieee80211_debugfs_remove_netdev(sdata);
1093
f0706e82 1094 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1095 __skb_queue_purge(&sdata->fragments[i].skb_list);
1096 sdata->fragment_next = 0;
11a843b7 1097
b9dcf712 1098 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1099 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1100}
1101
f142c6b9
JB		 1102static void ieee80211_uninit(struct net_device *dev)
1103{
1104 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1105}
1106
cf0277e7 1107static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1108 struct sk_buff *skb,
99932d4f
DB		 1109 void *accel_priv,
1110 select_queue_fallback_t fallback)
cf0277e7
JB		 1111{
1112 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1113}
1114
5a490510
JB		 1115static struct rtnl_link_stats64 *
1116ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1117{
1118 int i;
1119
1120 for_each_possible_cpu(i) {
1121 const struct pcpu_sw_netstats *tstats;
1122 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1123 unsigned int start;
1124
1125 tstats = per_cpu_ptr(dev->tstats, i);
1126
1127 do {
1128 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1129 rx_packets = tstats->rx_packets;
1130 tx_packets = tstats->tx_packets;
1131 rx_bytes = tstats->rx_bytes;
1132 tx_bytes = tstats->tx_bytes;
1133 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1134
1135 stats->rx_packets += rx_packets;
1136 stats->tx_packets += tx_packets;
1137 stats->rx_bytes += rx_bytes;
1138 stats->tx_bytes += tx_bytes;
1139 }
1140
1141 return stats;
1142}
1143
587e729e
JB		 1144static const struct net_device_ops ieee80211_dataif_ops = {
1145 .ndo_open = ieee80211_open,
1146 .ndo_stop = ieee80211_stop,
f142c6b9 1147 .ndo_uninit = ieee80211_uninit,
587e729e 1148 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1149 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1150 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1151 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1152 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1153 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1154};
1155
cf0277e7 1156static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1157 struct sk_buff *skb,
99932d4f
DB		 1158 void *accel_priv,
1159 select_queue_fallback_t fallback)
cf0277e7
JB		 1160{
1161 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1162 struct ieee80211_local *local = sdata->local;
1163 struct ieee80211_hdr *hdr;
1164 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1165
32c5057b 1166 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1167 return 0;
1168
1169 if (skb->len < 4 ||
b49bb574 1170 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1171 return 0; /* doesn't matter, frame will be dropped */
1172
b49bb574 1173 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1174
00e96dec 1175 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1176}
1177
587e729e
JB		 1178static const struct net_device_ops ieee80211_monitorif_ops = {
1179 .ndo_open = ieee80211_open,
1180 .ndo_stop = ieee80211_stop,
f142c6b9 1181 .ndo_uninit = ieee80211_uninit,
587e729e 1182 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1183 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1184 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1185 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1186 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1187 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1188};
1189
5a490510
JB		 1190static void ieee80211_if_free(struct net_device *dev)
1191{
1192 free_percpu(dev->tstats);
1193 free_netdev(dev);
1194}
1195
587e729e
JB		 1196static void ieee80211_if_setup(struct net_device *dev)
1197{
1198 ether_setup(dev);
550fd08c 1199 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1200 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1201 dev->destructor = ieee80211_if_free;
587e729e
JB		 1202}
1203
80a83cfc
MK		 1204static void ieee80211_if_setup_no_queue(struct net_device *dev)
1205{
1206 ieee80211_if_setup(dev);
1207 dev->priv_flags |= IFF_NO_QUEUE;
1208}
1209
1fa57d01
JB		 1210static void ieee80211_iface_work(struct work_struct *work)
1211{
1212 struct ieee80211_sub_if_data *sdata =
1213 container_of(work, struct ieee80211_sub_if_data, work);
1214 struct ieee80211_local *local = sdata->local;
1215 struct sk_buff *skb;
344eec67 1216 struct sta_info *sta;
c1475ca9 1217 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1218 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1219
1220 if (!ieee80211_sdata_running(sdata))
1221 return;
1222
fc58c47e 1223 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1224 return;
1225
4afaff17 1226 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1227 return;
1228
1229 /* first process frames */
1230 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1231 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1232
c1475ca9
JB		 1233 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1234 ra_tid = (void *)&skb->cb;
1235 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1236 ra_tid->tid);
1237 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1238 ra_tid = (void *)&skb->cb;
1239 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1240 ra_tid->tid);
08cf42e8
MK		 1241 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1242 rx_agg = (void *)&skb->cb;
1243 mutex_lock(&local->sta_mtx);
1244 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1245 if (sta)
08cf42e8 1246 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1247 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1248 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1249 false, true);
08cf42e8
MK		 1250 mutex_unlock(&local->sta_mtx);
1251 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1252 rx_agg = (void *)&skb->cb;
1253 mutex_lock(&local->sta_mtx);
1254 sta = sta_info_get_bss(sdata, rx_agg->addr);
1255 if (sta)
1256 __ieee80211_stop_rx_ba_session(sta,
1257 rx_agg->tid,
1258 WLAN_BACK_RECIPIENT, 0,
1259 false);
1260 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1261 } else if (ieee80211_is_action(mgmt->frame_control) &&
1262 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1263 int len = skb->len;
bed7ee6e 1264
a93e3644 1265 mutex_lock(&local->sta_mtx);
875ae5f6 1266 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1267 if (sta) {
1268 switch (mgmt->u.action.u.addba_req.action_code) {
1269 case WLAN_ACTION_ADDBA_REQ:
1270 ieee80211_process_addba_request(
1271 local, sta, mgmt, len);
1272 break;
1273 case WLAN_ACTION_ADDBA_RESP:
1274 ieee80211_process_addba_resp(local, sta,
1275 mgmt, len);
1276 break;
1277 case WLAN_ACTION_DELBA:
1278 ieee80211_process_delba(sdata, sta,
1279 mgmt, len);
1280 break;
1281 default:
1282 WARN_ON(1);
1283 break;
1284 }
1285 }
a93e3644 1286 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1287 } else if (ieee80211_is_action(mgmt->frame_control) &&
1288 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1289 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1290 case WLAN_VHT_ACTION_GROUPID_MGMT:
1291 ieee80211_process_mu_groups(sdata, mgmt);
1292 break;
1293 default:
1294 WARN_ON(1);
1295 break;
1296 }
344eec67
JB		 1297 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1298 struct ieee80211_hdr *hdr = (void *)mgmt;
1299 /*
1300 * So the frame isn't mgmt, but frame_control
1301 * is at the right place anyway, of course, so
1302 * the if statement is correct.
1303 *
1304 * Warn if we have other data frame types here,
1305 * they must not get here.
1306 */
1307 WARN_ON(hdr->frame_control &
1308 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1309 WARN_ON(!(hdr->seq_ctrl &
1310 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1311 /*
1312 * This was a fragment of a frame, received while
1313 * a block-ack session was active. That cannot be
1314 * right, so terminate the session.
1315 */
a93e3644 1316 mutex_lock(&local->sta_mtx);
875ae5f6 1317 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1318 if (sta) {
1319 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1320 IEEE80211_QOS_CTL_TID_MASK;
1321
1322 __ieee80211_stop_rx_ba_session(
1323 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1324 WLAN_REASON_QSTA_REQUIRE_SETUP,
1325 true);
344eec67 1326 }
a93e3644 1327 mutex_unlock(&local->sta_mtx);
bed7ee6e 1328 } else switch (sdata->vif.type) {
1fa57d01
JB		 1329 case NL80211_IFTYPE_STATION:
1330 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1331 break;
1332 case NL80211_IFTYPE_ADHOC:
1333 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1334 break;
1335 case NL80211_IFTYPE_MESH_POINT:
1336 if (!ieee80211_vif_is_mesh(&sdata->vif))
1337 break;
1338 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1339 break;
1340 default:
1341 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1342 break;
1343 }
36b3a628
JB		 1344
1345 kfree_skb(skb);
1fa57d01
JB		 1346 }
1347
1348 /* then other type-dependent work */
1349 switch (sdata->vif.type) {
1350 case NL80211_IFTYPE_STATION:
1351 ieee80211_sta_work(sdata);
1352 break;
1353 case NL80211_IFTYPE_ADHOC:
1354 ieee80211_ibss_work(sdata);
1355 break;
1356 case NL80211_IFTYPE_MESH_POINT:
1357 if (!ieee80211_vif_is_mesh(&sdata->vif))
1358 break;
1359 ieee80211_mesh_work(sdata);
1360 break;
239281f8
RL		 1361 case NL80211_IFTYPE_OCB:
1362 ieee80211_ocb_work(sdata);
1363 break;
1fa57d01
JB		 1364 default:
1365 break;
1366 }
1367}
1368
04ecd257
JB		 1369static void ieee80211_recalc_smps_work(struct work_struct *work)
1370{
1371 struct ieee80211_sub_if_data *sdata =
1372 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1373
1374 ieee80211_recalc_smps(sdata);
1375}
1fa57d01 1376
75636525
JB		 1377/*
1378 * Helper function to initialise an interface to a specific type.
1379 */
1380static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1381 enum nl80211_iftype type)
f0706e82 1382{
239281f8
RL		 1383 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1384 0xff, 0xff, 0xff};
1385
75636525
JB		 1386 /* clear type-dependent union */
1387 memset(&sdata->u, 0, sizeof(sdata->u));
1388
1389 /* and set some type-dependent values */
1390 sdata->vif.type = type;
2ca27bcf 1391 sdata->vif.p2p = false;
60719ffd 1392 sdata->wdev.iftype = type;
75636525 1393
a621fa4d
JB		 1394 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1395 sdata->control_port_no_encrypt = false;
2475b1cc 1396 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1397 sdata->vif.bss_conf.idle = true;
a621fa4d 1398
b53be792
SW		 1399 sdata->noack_map = 0;
1400
f142c6b9
JB		 1401 /* only monitor/p2p-device differ */
1402 if (sdata->dev) {
1403 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1404 sdata->dev->type = ARPHRD_ETHER;
1405 }
75636525 1406
35f20c14 1407 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1408 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1409 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1410 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1411 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1412 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1413
75636525 1414 switch (type) {
2ca27bcf
JB		 1415 case NL80211_IFTYPE_P2P_GO:
1416 type = NL80211_IFTYPE_AP;
1417 sdata->vif.type = type;
1418 sdata->vif.p2p = true;
1419 /* fall through */
05c914fe 1420 case NL80211_IFTYPE_AP:
d012a605 1421 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1422 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1423 INIT_WORK(&sdata->u.ap.request_smps_work,
1424 ieee80211_request_smps_ap_work);
ad2d223a 1425 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1426 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1427 break;
2ca27bcf
JB		 1428 case NL80211_IFTYPE_P2P_CLIENT:
1429 type = NL80211_IFTYPE_STATION;
1430 sdata->vif.type = type;
1431 sdata->vif.p2p = true;
1432 /* fall through */
05c914fe 1433 case NL80211_IFTYPE_STATION:
ad2d223a 1434 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1435 ieee80211_sta_setup_sdata(sdata);
472dbc45 1436 break;
6e0bd6c3 1437 case NL80211_IFTYPE_OCB:
239281f8
RL		 1438 sdata->vif.bss_conf.bssid = bssid_wildcard;
1439 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1440 break;
46900298 1441 case NL80211_IFTYPE_ADHOC:
ad2d223a 1442 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1443 ieee80211_ibss_setup_sdata(sdata);
1444 break;
05c914fe 1445 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1446 if (ieee80211_vif_is_mesh(&sdata->vif))
1447 ieee80211_mesh_init_sdata(sdata);
1448 break;
05c914fe 1449 case NL80211_IFTYPE_MONITOR:
75636525 1450 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1451 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1452 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1453 MONITOR_FLAG_OTHER_BSS;
1454 break;
05c914fe 1455 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1456 sdata->vif.bss_conf.bssid = NULL;
1457 break;
05c914fe 1458 case NL80211_IFTYPE_AP_VLAN:
98104fde 1459 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1460 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1461 break;
05c914fe 1462 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1463 case NUM_NL80211_IFTYPES:
75636525
JB		 1464 BUG();
1465 break;
1466 }
1467
1468 ieee80211_debugfs_add_netdev(sdata);
1469}
1470
34d4bc4d
JB		 1471static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1472 enum nl80211_iftype type)
1473{
1474 struct ieee80211_local *local = sdata->local;
1475 int ret, err;
2ca27bcf
JB		 1476 enum nl80211_iftype internal_type = type;
1477 bool p2p = false;
34d4bc4d
JB		 1478
1479 ASSERT_RTNL();
1480
1481 if (!local->ops->change_interface)
1482 return -EBUSY;
1483
1484 switch (sdata->vif.type) {
1485 case NL80211_IFTYPE_AP:
1486 case NL80211_IFTYPE_STATION:
1487 case NL80211_IFTYPE_ADHOC:
239281f8 1488 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1489 /*
1490 * Could maybe also all others here?
1491 * Just not sure how that interacts
1492 * with the RX/config path e.g. for
1493 * mesh.
1494 */
1495 break;
1496 default:
1497 return -EBUSY;
1498 }
1499
1500 switch (type) {
1501 case NL80211_IFTYPE_AP:
1502 case NL80211_IFTYPE_STATION:
1503 case NL80211_IFTYPE_ADHOC:
239281f8 1504 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1505 /*
1506 * Could probably support everything
1507 * but WDS here (WDS do_open can fail
1508 * under memory pressure, which this
1509 * code isn't prepared to handle).
1510 */
1511 break;
2ca27bcf
JB		 1512 case NL80211_IFTYPE_P2P_CLIENT:
1513 p2p = true;
1514 internal_type = NL80211_IFTYPE_STATION;
1515 break;
1516 case NL80211_IFTYPE_P2P_GO:
1517 p2p = true;
1518 internal_type = NL80211_IFTYPE_AP;
1519 break;
34d4bc4d
JB		 1520 default:
1521 return -EBUSY;
1522 }
1523
2ca27bcf 1524 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1525 if (ret)
1526 return ret;
1527
1528 ieee80211_do_stop(sdata, false);
1529
f142c6b9 1530 ieee80211_teardown_sdata(sdata);
34d4bc4d 1531
2ca27bcf 1532 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1533 if (ret)
a9865538 1534 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1535
3a25a8c8
JB		 1536 /*
1537 * Ignore return value here, there's not much we can do since
1538 * the driver changed the interface type internally already.
1539 * The warnings will hopefully make driver authors fix it :-)
1540 */
a9865538 1541 ieee80211_check_queues(sdata, type);
3a25a8c8 1542
34d4bc4d
JB		 1543 ieee80211_setup_sdata(sdata, type);
1544
f142c6b9 1545 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1546 WARN(err, "type change: do_open returned %d", err);
1547
1548 return ret;
1549}
1550
f3947e2d 1551int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1552 enum nl80211_iftype type)
75636525 1553{
34d4bc4d
JB		 1554 int ret;
1555
f3947e2d
JB		 1556 ASSERT_RTNL();
1557
2ca27bcf 1558 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1559 return 0;
1560
34d4bc4d
JB		 1561 if (ieee80211_sdata_running(sdata)) {
1562 ret = ieee80211_runtime_change_iftype(sdata, type);
1563 if (ret)
1564 return ret;
1565 } else {
1566 /* Purge and reset type-dependent state. */
f142c6b9 1567 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1568 ieee80211_setup_sdata(sdata, type);
1569 }
75636525
JB		 1570
1571 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1572 if (type == NL80211_IFTYPE_STATION)
1573 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1574
1575 return 0;
f0706e82
JB		 1576}
1577
fa9029f8 1578static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1579 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1580{
1581 struct ieee80211_sub_if_data *sdata;
1582 u64 mask, start, addr, val, inc;
1583 u8 *m;
1584 u8 tmp_addr[ETH_ALEN];
1585 int i;
1586
1587 /* default ... something at least */
f142c6b9 1588 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1589
1590 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1591 local->hw.wiphy->n_addresses <= 1)
1592 return;
1593
fa9029f8
JB		 1594 mutex_lock(&local->iflist_mtx);
1595
1596 switch (type) {
1597 case NL80211_IFTYPE_MONITOR:
1598 /* doesn't matter */
1599 break;
1600 case NL80211_IFTYPE_WDS:
1601 case NL80211_IFTYPE_AP_VLAN:
1602 /* match up with an AP interface */
1603 list_for_each_entry(sdata, &local->interfaces, list) {
1604 if (sdata->vif.type != NL80211_IFTYPE_AP)
1605 continue;
f142c6b9 1606 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1607 break;
1608 }
1609 /* keep default if no AP interface present */
1610 break;
6d71117a
JB		 1611 case NL80211_IFTYPE_P2P_CLIENT:
1612 case NL80211_IFTYPE_P2P_GO:
30686bf7 1613 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1614 list_for_each_entry(sdata, &local->interfaces, list) {
1615 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1616 continue;
1617 if (!ieee80211_sdata_running(sdata))
1618 continue;
1619 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1620 goto out_unlock;
1621 }
1622 }
1623 /* otherwise fall through */
fa9029f8
JB		 1624 default:
1625 /* assign a new address if possible -- try n_addresses first */
1626 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1627 bool used = false;
1628
1629 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1630 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1631 sdata->vif.addr)) {
fa9029f8
JB		 1632 used = true;
1633 break;
1634 }
1635 }
1636
1637 if (!used) {
f142c6b9 1638 memcpy(perm_addr,
fa9029f8
JB		 1639 local->hw.wiphy->addresses[i].addr,
1640 ETH_ALEN);
1641 break;
1642 }
1643 }
1644
1645 /* try mask if available */
1646 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1647 break;
1648
1649 m = local->hw.wiphy->addr_mask;
1650 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1651 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1652 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1653
1654 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1655 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1656 pr_info("not contiguous\n");
fa9029f8
JB		 1657 break;
1658 }
1659
ac20976d
HS		 1660 /*
1661 * Pick address of existing interface in case user changed
1662 * MAC address manually, default to perm_addr.
1663 */
fa9029f8 1664 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1665 list_for_each_entry(sdata, &local->interfaces, list) {
1666 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1667 continue;
1668 m = sdata->vif.addr;
1669 break;
1670 }
fa9029f8
JB		 1671 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1672 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1673 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1674
1675 inc = 1ULL<<__ffs64(mask);
1676 val = (start & mask);
1677 addr = (start & ~mask) | (val & mask);
1678 do {
1679 bool used = false;
1680
1681 tmp_addr[5] = addr >> 0*8;
1682 tmp_addr[4] = addr >> 1*8;
1683 tmp_addr[3] = addr >> 2*8;
1684 tmp_addr[2] = addr >> 3*8;
1685 tmp_addr[1] = addr >> 4*8;
1686 tmp_addr[0] = addr >> 5*8;
1687
1688 val += inc;
1689
1690 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1691 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1692 used = true;
1693 break;
1694 }
1695 }
1696
1697 if (!used) {
f142c6b9 1698 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1699 break;
1700 }
1701 addr = (start & ~mask) | (val & mask);
1702 } while (addr != start);
1703
1704 break;
1705 }
1706
6d71117a 1707 out_unlock:
fa9029f8
JB		 1708 mutex_unlock(&local->iflist_mtx);
1709}
1710
3e122be0 1711int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1712 unsigned char name_assign_type,
84efbb84 1713 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1714 struct vif_params *params)
f0706e82 1715{
f142c6b9 1716 struct net_device *ndev = NULL;
f0706e82 1717 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1718 struct txq_info *txqi;
80a83cfc 1719 void (*if_setup)(struct net_device *dev);
75636525 1720 int ret, i;
ded81f6b 1721 int txqs = 1;
f0706e82
JB		 1722
1723 ASSERT_RTNL();
75636525 1724
f142c6b9
JB		 1725 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1726 struct wireless_dev *wdev;
1727
1728 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1729 GFP_KERNEL);
1730 if (!sdata)
1731 return -ENOMEM;
1732 wdev = &sdata->wdev;
1733
1734 sdata->dev = NULL;
1735 strlcpy(sdata->name, name, IFNAMSIZ);
1736 ieee80211_assign_perm_addr(local, wdev->address, type);
1737 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1738 } else {
ba8c3d6f
FF		 1739 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1740 sizeof(void *));
1741 int txq_size = 0;
1742
1743 if (local->ops->wake_tx_queue)
1744 txq_size += sizeof(struct txq_info) +
1745 local->hw.txq_data_size;
1746
80a83cfc
MK		 1747 if (local->ops->wake_tx_queue)
1748 if_setup = ieee80211_if_setup_no_queue;
1749 else
1750 if_setup = ieee80211_if_setup;
1751
f142c6b9
JB		 1752 if (local->hw.queues >= IEEE80211_NUM_ACS)
1753 txqs = IEEE80211_NUM_ACS;
1754
ba8c3d6f 1755 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1756 name, name_assign_type,
80a83cfc 1757 if_setup, txqs, 1);
f142c6b9
JB		 1758 if (!ndev)
1759 return -ENOMEM;
1760 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1761
5a490510
JB		 1762 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1763 if (!ndev->tstats) {
1764 free_netdev(ndev);
1765 return -ENOMEM;
1766 }
1767
f142c6b9
JB		 1768 ndev->needed_headroom = local->tx_headroom +
1769 4*6 /* four MAC addresses */
1770 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1771 + 6 /* mesh */
1772 + 8 /* rfc1042/bridge tunnel */
1773 - ETH_HLEN /* ethernet hard_header_len */
1774 + IEEE80211_ENCRYPT_HEADROOM;
1775 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1776
1777 ret = dev_alloc_name(ndev, ndev->name);
1778 if (ret < 0) {
e6436be2 1779 ieee80211_if_free(ndev);
f142c6b9
JB		 1780 return ret;
1781 }
1782
1783 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1784 if (params && is_valid_ether_addr(params->macaddr))
1785 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1786 else
1787 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1788 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1789
1790 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1791 sdata = netdev_priv(ndev);
1792 ndev->ieee80211_ptr = &sdata->wdev;
1793 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1794 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1795
ba8c3d6f
FF		 1796 if (txq_size) {
1797 txqi = netdev_priv(ndev) + size;
fa962b92 1798 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1799 }
1800
f142c6b9
JB		 1801 sdata->dev = ndev;
1802 }
75636525
JB		 1803
1804 /* initialise type-independent data */
f0706e82 1805 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1806 sdata->local = local;
75636525
JB		 1807
1808 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1809 skb_queue_head_init(&sdata->fragments[i].skb_list);
1810
1811 INIT_LIST_HEAD(&sdata->key_list);
1812
164eb02d
SW		 1813 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1814 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1815 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1816 ieee80211_delayed_tailroom_dec);
97f97b1f 1817
57fbcce3 1818 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1819 struct ieee80211_supported_band *sband;
1820 sband = local->hw.wiphy->bands[i];
1821 sdata->rc_rateidx_mask[i] =
1822 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1823 if (sband) {
1824 __le16 cap;
1825 u16 *vht_rate_mask;
1826
19468413
SW		 1827 memcpy(sdata->rc_rateidx_mcs_mask[i],
1828 sband->ht_cap.mcs.rx_mask,
1829 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1830
1831 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1832 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1833 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1834 } else {
19468413
SW		 1835 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1836 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1837 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1838 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1839 }
37eb0b16 1840 }
75636525 1841
3a25a8c8
JB		 1842 ieee80211_set_default_queues(sdata);
1843
1ea6f9c0
JB		 1844 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1845 sdata->user_power_level = local->user_power_level;
1846
2475b1cc
MS		 1847 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1848
75636525
JB		 1849 /* setup type-dependent data */
1850 ieee80211_setup_sdata(sdata, type);
f0706e82 1851
f142c6b9
JB		 1852 if (ndev) {
1853 if (params) {
1854 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1855 if (type == NL80211_IFTYPE_STATION)
1856 sdata->u.mgd.use_4addr = params->use_4addr;
1857 }
9bc383de 1858
f142c6b9 1859 ndev->features |= local->hw.netdev_features;
72d78728 1860
b7ffbd7e
JB		 1861 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1862
f142c6b9
JB		 1863 ret = register_netdevice(ndev);
1864 if (ret) {
e6436be2 1865 ieee80211_if_free(ndev);
f142c6b9
JB		 1866 return ret;
1867 }
1868 }
f0706e82 1869
c771c9d8 1870 mutex_lock(&local->iflist_mtx);
79010420 1871 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1872 mutex_unlock(&local->iflist_mtx);
79010420 1873
84efbb84
JB		 1874 if (new_wdev)
1875 *new_wdev = &sdata->wdev;
f0706e82 1876
f0706e82 1877 return 0;
f0706e82
JB		 1878}
1879
f698d856 1880void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1881{
f0706e82 1882 ASSERT_RTNL();
11a843b7 1883
c771c9d8 1884 mutex_lock(&sdata->local->iflist_mtx);
75636525 1885 list_del_rcu(&sdata->list);
c771c9d8
JB		 1886 mutex_unlock(&sdata->local->iflist_mtx);
1887
75636525 1888 synchronize_rcu();
f142c6b9
JB		 1889
1890 if (sdata->dev) {
1891 unregister_netdevice(sdata->dev);
1892 } else {
1893 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1894 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1895 kfree(sdata);
1896 }
1897}
1898
1899void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1900{
1901 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1902 return;
1903 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1904}
1905
75636525 1906void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1907{
75636525 1908 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1909 LIST_HEAD(unreg_list);
f142c6b9 1910 LIST_HEAD(wdev_list);
f0706e82
JB		 1911
1912 ASSERT_RTNL();
1913
d8d9008c
JB		 1914 /* Before destroying the interfaces, make sure they're all stopped so
1915 * that the hardware is stopped. Otherwise, the driver might still be
1916 * iterating the interfaces during the shutdown, e.g. from a worker
1917 * or from RX processing or similar, and if it does so (using atomic
1918 * iteration) while we're manipulating the list, the iteration will
1919 * crash.
1920 *
1921 * After this, the hardware should be stopped and the driver should
1922 * have stopped all of its activities, so that we can do RCU-unaware
1923 * manipulations of the interface list below.
c8aa22db 1924 */
d8d9008c
JB		 1925 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1926
1927 WARN(local->open_count, "%s: open count remains %d\n",
1928 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1929
efe117ab 1930 mutex_lock(&local->iflist_mtx);
75636525
JB		 1931 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1932 list_del(&sdata->list);
c771c9d8 1933
f142c6b9
JB		 1934 if (sdata->dev)
1935 unregister_netdevice_queue(sdata->dev, &unreg_list);
1936 else
1937 list_add(&sdata->list, &wdev_list);
f0706e82 1938 }
efe117ab
ED		 1939 mutex_unlock(&local->iflist_mtx);
1940 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1941
1942 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1943 list_del(&sdata->list);
1944 cfg80211_unregister_wdev(&sdata->wdev);
1945 kfree(sdata);
1946 }
f0706e82 1947}
5cff20e6 1948
47846c9b 1949static int netdev_notify(struct notifier_block *nb,
351638e7 1950 unsigned long state, void *ptr)
47846c9b 1951{
351638e7 1952 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1953 struct ieee80211_sub_if_data *sdata;
1954
1955 if (state != NETDEV_CHANGENAME)
8bd811aa 1956 return NOTIFY_DONE;
47846c9b
JB		 1957
1958 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1959 return NOTIFY_DONE;
47846c9b
JB		 1960
1961 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1962 return NOTIFY_DONE;
47846c9b
JB		 1963
1964 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1965 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1966 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1967
1968 return NOTIFY_OK;
47846c9b
JB		 1969}
1970
1971static struct notifier_block mac80211_netdev_notifier = {
1972 .notifier_call = netdev_notify,
1973};
1974
1975int ieee80211_iface_init(void)
1976{
1977 return register_netdevice_notifier(&mac80211_netdev_notifier);
1978}
1979
1980void ieee80211_iface_exit(void)
1981{
1982 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1983}
Linux kernel - Deliverables
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