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Merge tag 'spi-fix-v4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 9 * Copyright (c) 2016 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
5a0e3ad6 15#include <linux/slab.h>
f0706e82
JB		 16#include <linux/kernel.h>
17#include <linux/if_arp.h>
18#include <linux/netdevice.h>
19#include <linux/rtnetlink.h>
20#include <net/mac80211.h>
cf0277e7 21#include <net/ieee80211_radiotap.h>
f0706e82
JB		 22#include "ieee80211_i.h"
23#include "sta_info.h"
e9f207f0 24#include "debugfs_netdev.h"
ee385855 25#include "mesh.h"
0d143fe1 26#include "led.h"
24487981 27#include "driver-ops.h"
cf0277e7 28#include "wme.h"
1be7fe8d 29#include "rate.h"
0d143fe1 30
c771c9d8
JB		 31/**
32 * DOC: Interface list locking
33 *
34 * The interface list in each struct ieee80211_local is protected
35 * three-fold:
36 *
37 * (1) modifications may only be done under the RTNL
38 * (2) modifications and readers are protected against each other by
39 * the iflist_mtx.
40 * (3) modifications are done in an RCU manner so atomic readers
41 * can traverse the list in RCU-safe blocks.
42 *
43 * As a consequence, reads (traversals) of the list can be protected
44 * by either the RTNL, the iflist_mtx or RCU.
45 */
46
42bd20d9
AE		 47static void ieee80211_iface_work(struct work_struct *work);
48
1ea6f9c0
JB		 49bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50{
51 struct ieee80211_chanctx_conf *chanctx_conf;
52 int power;
53
54 rcu_read_lock();
55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
56 if (!chanctx_conf) {
57 rcu_read_unlock();
58 return false;
59 }
60
0430c883 61 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 62 rcu_read_unlock();
63
64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->user_power_level);
66
67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
68 power = min(power, sdata->ap_power_level);
69
70 if (power != sdata->vif.bss_conf.txpower) {
71 sdata->vif.bss_conf.txpower = power;
72 ieee80211_hw_config(sdata->local, 0);
73 return true;
74 }
75
76 return false;
77}
78
db82d8a9
LB		 79void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 bool update_bss)
1ea6f9c0 81{
5ad11b50
EG		 82 if (__ieee80211_recalc_txpower(sdata) ||
83 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
85}
c771c9d8 86
62a40a15 87static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 88{
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 return 0;
91
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
94}
95
62a40a15 96static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 97{
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 return 0;
100
3b24f4c6 101 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 102
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
105}
106
62a40a15
JB		 107static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool force_active)
cc45ae54 109{
1d5e1266 110 bool working, scanning, active;
cc45ae54 111 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 112
cc45ae54
JB		 113 lockdep_assert_held(&local->mtx);
114
62a40a15
JB		 115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
117 local->monitors;
cc45ae54 118
1d5e1266
JB		 119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
cc45ae54 121
f1e3e051
JB		 122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 124
cc45ae54
JB		 125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129
fd0f979a 130 if (active)
cc45ae54
JB		 131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 else
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136
fd0f979a 137 if (working || scanning || active)
62a40a15
JB		 138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
140}
141
142u32 ieee80211_idle_off(struct ieee80211_local *local)
143{
144 return __ieee80211_recalc_idle(local, true);
145}
146
147void ieee80211_recalc_idle(struct ieee80211_local *local)
148{
149 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 150 if (change)
151 ieee80211_hw_config(local, change);
cc45ae54
JB		 152}
153
3899ba90 154static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 155 bool check_dup)
478622e8 156{
ac20976d
HS		 157 struct ieee80211_local *local = sdata->local;
158 struct ieee80211_sub_if_data *iter;
478622e8
HS		 159 u64 new, mask, tmp;
160 u8 *m;
161 int ret = 0;
162
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
164 return 0;
165
166 m = addr;
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
31eba5bc
FF		 176 if (!check_dup)
177 return ret;
478622e8
HS		 178
179 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 180 list_for_each_entry(iter, &local->interfaces, list) {
181 if (iter == sdata)
478622e8
HS		 182 continue;
183
3899ba90 184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 186 continue;
187
ac20976d 188 m = iter->vif.addr;
478622e8
HS		 189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192
193 if ((new & ~mask) != (tmp & ~mask)) {
194 ret = -EINVAL;
195 break;
196 }
197 }
198 mutex_unlock(&local->iflist_mtx);
199
200 return ret;
201}
202
47846c9b
JB		 203static int ieee80211_change_mac(struct net_device *dev, void *addr)
204{
205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 206 struct sockaddr *sa = addr;
31eba5bc 207 bool check_dup = true;
47846c9b
JB		 208 int ret;
209
9607e6b6 210 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 211 return -EBUSY;
212
31eba5bc 213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 215 check_dup = false;
216
3899ba90 217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 218 if (ret)
219 return ret;
220
fc5f7577 221 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 222
223 if (ret == 0)
fc5f7577 224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 225
226 return ret;
227}
228
0d143fe1
JB		 229static inline int identical_mac_addr_allowed(int type1, int type2)
230{
231 return type1 == NL80211_IFTYPE_MONITOR ||
232 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 233 type1 == NL80211_IFTYPE_P2P_DEVICE ||
234 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
236 (type1 == NL80211_IFTYPE_WDS &&
237 (type2 == NL80211_IFTYPE_WDS ||
238 type2 == NL80211_IFTYPE_AP)) ||
239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
240 (type1 == NL80211_IFTYPE_AP_VLAN &&
241 (type2 == NL80211_IFTYPE_AP ||
242 type2 == NL80211_IFTYPE_AP_VLAN));
243}
244
87490f6d
JB		 245static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
246 enum nl80211_iftype iftype)
0d143fe1 247{
b4a4bf5d 248 struct ieee80211_local *local = sdata->local;
87490f6d 249 struct ieee80211_sub_if_data *nsdata;
b6a55015 250 int ret;
0d143fe1 251
87490f6d 252 ASSERT_RTNL();
0d143fe1
JB		 253
254 /* we hold the RTNL here so can safely walk the list */
255 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 257 /*
258 * Only OCB and monitor mode may coexist
259 */
260 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
262 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
263 nsdata->vif.type == NL80211_IFTYPE_OCB))
264 return -EBUSY;
265
0d143fe1
JB		 266 /*
267 * Allow only a single IBSS interface to be up at any
268 * time. This is restricted because beacon distribution
269 * cannot work properly if both are in the same IBSS.
270 *
271 * To remove this restriction we'd have to disallow them
272 * from setting the same SSID on different IBSS interfaces
273 * belonging to the same hardware. Then, however, we're
274 * faced with having to adopt two different TSF timers...
275 */
87490f6d 276 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 277 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 return -EBUSY;
73da7d5b
SW		 279 /*
280 * will not add another interface while any channel
281 * switch is active.
282 */
283 if (nsdata->vif.csa_active)
284 return -EBUSY;
0d143fe1
JB		 285
286 /*
287 * The remaining checks are only performed for interfaces
288 * with the same MAC address.
289 */
371a255e
JB		 290 if (!ether_addr_equal(sdata->vif.addr,
291 nsdata->vif.addr))
0d143fe1
JB		 292 continue;
293
294 /*
295 * check whether it may have the same address
296 */
87490f6d 297 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 298 nsdata->vif.type))
299 return -ENOTUNIQ;
300
301 /*
302 * can only add VLANs to enabled APs
303 */
87490f6d 304 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 305 nsdata->vif.type == NL80211_IFTYPE_AP)
306 sdata->bss = &nsdata->u.ap;
307 }
308 }
309
b6a55015
LC		 310 mutex_lock(&local->chanctx_mtx);
311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
312 mutex_unlock(&local->chanctx_mtx);
313 return ret;
87490f6d
JB		 314}
315
a9865538
JB		 316static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
317 enum nl80211_iftype iftype)
3a25a8c8
JB		 318{
319 int n_queues = sdata->local->hw.queues;
320 int i;
321
708d50ed
AB		 322 if (iftype == NL80211_IFTYPE_NAN)
323 return 0;
324
a9865538 325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 326 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
328 IEEE80211_INVAL_HW_QUEUE))
329 return -EINVAL;
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 n_queues))
332 return -EINVAL;
333 }
3a25a8c8
JB		 334 }
335
a9865538
JB		 336 if ((iftype != NL80211_IFTYPE_AP &&
337 iftype != NL80211_IFTYPE_P2P_GO &&
338 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
341 return 0;
342 }
343
344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
345 return -EINVAL;
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 return -EINVAL;
349
350 return 0;
351}
352
85416a4f
CL		 353void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
354 const int offset)
355{
356 struct ieee80211_local *local = sdata->local;
d8212184 357 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 358
359#define ADJUST(_f, _s) do { \
360 if (flags & MONITOR_FLAG_##_f) \
361 local->fif_##_s += offset; \
362 } while (0)
363
364 ADJUST(FCSFAIL, fcsfail);
365 ADJUST(PLCPFAIL, plcpfail);
366 ADJUST(CONTROL, control);
367 ADJUST(CONTROL, pspoll);
368 ADJUST(OTHER_BSS, other_bss);
369
370#undef ADJUST
371}
372
3a25a8c8
JB		 373static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
374{
375 struct ieee80211_local *local = sdata->local;
376 int i;
377
378 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 381 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 382 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 383 else
384 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 385 }
386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
387}
388
3c3e21e7 389int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 390{
391 struct ieee80211_sub_if_data *sdata;
8b305780 392 int ret;
4b6f1dd6 393
30686bf7 394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 395 return 0;
396
8b305780 397 ASSERT_RTNL();
685fb72b 398
4b6f1dd6 399 if (local->monitor_sdata)
8b305780 400 return 0;
4b6f1dd6
JB		 401
402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 403 if (!sdata)
404 return -ENOMEM;
4b6f1dd6
JB		 405
406 /* set up data */
407 sdata->local = local;
408 sdata->vif.type = NL80211_IFTYPE_MONITOR;
409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
410 wiphy_name(local->hw.wiphy));
34171dc0 411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 412
2475b1cc
MS		 413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
414
3a25a8c8
JB		 415 ieee80211_set_default_queues(sdata);
416
4b6f1dd6
JB		 417 ret = drv_add_interface(local, sdata);
418 if (WARN_ON(ret)) {
419 /* ok .. stupid driver, it asked for this! */
420 kfree(sdata);
8b305780 421 return ret;
4b6f1dd6
JB		 422 }
423
a9865538 424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 425 if (ret) {
426 kfree(sdata);
8b305780 427 return ret;
3a25a8c8
JB		 428 }
429
fab57a6c
JB		 430 mutex_lock(&local->iflist_mtx);
431 rcu_assign_pointer(local->monitor_sdata, sdata);
432 mutex_unlock(&local->iflist_mtx);
433
34a3740d 434 mutex_lock(&local->mtx);
4bf88530 435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 436 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 437 mutex_unlock(&local->mtx);
55de908a 438 if (ret) {
fab57a6c 439 mutex_lock(&local->iflist_mtx);
0c2bef46 440 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 441 mutex_unlock(&local->iflist_mtx);
442 synchronize_net();
55de908a
JB		 443 drv_remove_interface(local, sdata);
444 kfree(sdata);
8b305780 445 return ret;
55de908a
JB		 446 }
447
42bd20d9
AE		 448 skb_queue_head_init(&sdata->skb_queue);
449 INIT_WORK(&sdata->work, ieee80211_iface_work);
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:
cb3b7d87 543 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 544 /* no special treatment */
545 break;
546 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 547 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 548 case NL80211_IFTYPE_P2P_CLIENT:
549 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 550 /* cannot happen */
551 WARN_ON(1);
552 break;
553 }
554
555 if (local->open_count == 0) {
24487981 556 res = drv_start(local);
0d143fe1
JB		 557 if (res)
558 goto err_del_bss;
e8975581
JB		 559 /* we're brought up, everything changes */
560 hw_reconf_flags = ~0;
1f87f7d3 561 ieee80211_led_radio(local, true);
67408c8c
JB		 562 ieee80211_mod_tpt_led_trig(local,
563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 564 }
565
566 /*
bf533e0b
JB		 567 * Copy the hopefully now-present MAC address to
568 * this interface, if it has the special null one.
0d143fe1 569 */
f142c6b9 570 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 571 memcpy(dev->dev_addr,
572 local->hw.wiphy->perm_addr,
573 ETH_ALEN);
574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
575
576 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 577 res = -EADDRNOTAVAIL;
578 goto err_stop;
0adc23f5 579 }
0d143fe1
JB		 580 }
581
0d143fe1
JB		 582 switch (sdata->vif.type) {
583 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 584 /* no need to tell driver, but set carrier and chanctx */
585 if (rtnl_dereference(sdata->bss->beacon)) {
586 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 587 netif_carrier_on(dev);
4d76d21b 588 } else {
3edaf3e6 589 netif_carrier_off(dev);
4d76d21b 590 }
0d143fe1
JB		 591 break;
592 case NL80211_IFTYPE_MONITOR:
d8212184 593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 594 local->cooked_mntrs++;
595 break;
596 }
597
d8212184 598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 599 res = drv_add_interface(local, sdata);
600 if (res)
601 goto err_stop;
602 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 603 res = ieee80211_add_virtual_monitor(local);
604 if (res)
605 goto err_stop;
606 }
607
0d143fe1
JB		 608 /* must be before the call to ieee80211_configure_filter */
609 local->monitors++;
e8975581 610 if (local->monitors == 1) {
0869aea0
JB		 611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 613 }
0d143fe1 614
85416a4f 615 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 616 ieee80211_configure_filter(local);
801d929c
FF		 617 mutex_lock(&local->mtx);
618 ieee80211_recalc_idle(local);
619 mutex_unlock(&local->mtx);
53e9b1de
DG		 620
621 netif_carrier_on(dev);
0d143fe1 622 break;
0d143fe1 623 default:
34d4bc4d 624 if (coming_up) {
075e0847
JB		 625 ieee80211_del_virtual_monitor(local);
626
7b7eab6f 627 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 628 if (res)
629 goto err_stop;
a9865538
JB		 630 res = ieee80211_check_queues(sdata,
631 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 632 if (res)
633 goto err_del_interface;
34d4bc4d 634 }
0d143fe1 635
29cbe68c 636 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 637 local->fif_pspoll++;
7be5086d 638 local->fif_probe_req++;
e3b90ca2 639
e3b90ca2 640 ieee80211_configure_filter(local);
7be5086d
JB		 641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
642 local->fif_probe_req++;
a3c9aa51 643 }
e3b90ca2 644
708d50ed
AB		 645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
646 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 647 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 648 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 649
c405c629
JB		 650 switch (sdata->vif.type) {
651 case NL80211_IFTYPE_STATION:
652 case NL80211_IFTYPE_ADHOC:
653 case NL80211_IFTYPE_AP:
654 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 655 case NL80211_IFTYPE_OCB:
0d143fe1 656 netif_carrier_off(dev);
c405c629 657 break;
1411af15 658 case NL80211_IFTYPE_WDS:
f142c6b9 659 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 660 case NL80211_IFTYPE_NAN:
1411af15 661 break;
c405c629 662 default:
a2310824
JB		 663 /* not reached */
664 WARN_ON(1);
c405c629 665 }
59034591
EP		 666
667 /*
cec66283 668 * Set default queue parameters so drivers don't
59034591 669 * need to initialise the hardware if the hardware
cec66283
JB		 670 * doesn't start up with sane defaults.
671 * Enable QoS for anything but station interfaces.
59034591 672 */
cec66283
JB		 673 ieee80211_set_wmm_default(sdata, true,
674 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 675 }
676
2d2080c3
JB		 677 set_bit(SDATA_STATE_RUNNING, &sdata->state);
678
0d143fe1
JB		 679 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
680 /* Create STA entry for the WDS peer */
681 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
682 GFP_KERNEL);
683 if (!sta) {
684 res = -ENOMEM;
685 goto err_del_interface;
686 }
687
83d5cc01
JB		 688 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
689 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
690 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 691
692 res = sta_info_insert(sta);
693 if (res) {
694 /* STA has been freed */
695 goto err_del_interface;
696 }
1be7fe8d
BJ		 697
698 rate_control_rate_init(sta);
1411af15 699 netif_carrier_on(dev);
f142c6b9
JB		 700 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
701 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 702 }
703
0d143fe1
JB		 704 /*
705 * set_multicast_list will be invoked by the networking core
706 * which will check whether any increments here were done in
707 * error and sync them down to the hardware as filter flags.
708 */
709 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
710 atomic_inc(&local->iff_allmultis);
711
34d4bc4d
JB		 712 if (coming_up)
713 local->open_count++;
714
59034591 715 if (hw_reconf_flags)
e8975581 716 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 717
4a733ef1 718 ieee80211_recalc_ps(local);
965bedad 719
2b436312
JB		 720 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
721 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
722 /* XXX: for AP_VLAN, actually track AP queues */
723 netif_tx_start_all_queues(dev);
724 } else if (dev) {
2b730daa
JB		 725 unsigned long flags;
726 int n_acs = IEEE80211_NUM_ACS;
727 int ac;
728
729 if (local->hw.queues < IEEE80211_NUM_ACS)
730 n_acs = 1;
731
732 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
733 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
734 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
735 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
736 for (ac = 0; ac < n_acs; ac++) {
737 int ac_queue = sdata->vif.hw_queue[ac];
738
739 if (local->queue_stop_reasons[ac_queue] == 0 &&
740 skb_queue_empty(&local->pending[ac_queue]))
741 netif_start_subqueue(dev, ac);
742 }
743 }
744 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
745 }
0d143fe1
JB		 746
747 return 0;
748 err_del_interface:
7b7eab6f 749 drv_remove_interface(local, sdata);
0d143fe1 750 err_stop:
24487981
JB		 751 if (!local->open_count)
752 drv_stop(local);
0d143fe1
JB		 753 err_del_bss:
754 sdata->bss = NULL;
4e141dad
MK		 755 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
756 mutex_lock(&local->mtx);
0d143fe1 757 list_del(&sdata->u.vlan.list);
4e141dad
MK		 758 mutex_unlock(&local->mtx);
759 }
4d6c36fa 760 /* might already be clear but that doesn't matter */
2d2080c3 761 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 762 return res;
763}
764
34d4bc4d 765static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 766{
767 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 768 int err;
769
770 /* fail early if user set an invalid address */
2fcf2824 771 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 772 return -EADDRNOTAVAIL;
773
774 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
775 if (err)
776 return err;
777
f142c6b9 778 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 779}
780
781static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
782 bool going_down)
783{
0d143fe1 784 struct ieee80211_local *local = sdata->local;
fa962b92 785 struct fq *fq = &local->fq;
5061b0c2
JB		 786 unsigned long flags;
787 struct sk_buff *skb, *tmp;
e8975581 788 u32 hw_reconf_flags = 0;
09f4114e 789 int i, flushed;
397a7a24 790 struct ps_data *ps;
d2859df5 791 struct cfg80211_chan_def chandef;
46238845 792 bool cancel_scan;
167e33f4 793 struct cfg80211_nan_func *func;
0d143fe1 794
c29acf20
RM		 795 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
796
46238845
JB		 797 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
798 if (cancel_scan)
352ffad6
BC		 799 ieee80211_scan_cancel(local);
800
0d143fe1
JB		 801 /*
802 * Stop TX on this interface first.
803 */
f142c6b9
JB		 804 if (sdata->dev)
805 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 806
c8f994ee 807 ieee80211_roc_purge(local, sdata);
af6b6374 808
8ffcc704
EG		 809 switch (sdata->vif.type) {
810 case NL80211_IFTYPE_STATION:
572078be 811 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 812 break;
813 case NL80211_IFTYPE_ADHOC:
cd7760e6 814 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 815 break;
816 case NL80211_IFTYPE_AP:
817 cancel_work_sync(&sdata->u.ap.request_smps_work);
818 break;
819 default:
820 break;
821 }
cd7760e6 822
0d143fe1
JB		 823 /*
824 * Remove all stations associated with this interface.
825 *
826 * This must be done before calling ops->remove_interface()
827 * because otherwise we can later invoke ops->sta_notify()
828 * whenever the STAs are removed, and that invalidates driver
829 * assumptions about always getting a vif pointer that is valid
830 * (because if we remove a STA after ops->remove_interface()
831 * the driver will have removed the vif info already!)
832 *
5eb8f4d7
JB		 833 * In WDS mode a station must exist here and be flushed, for
834 * AP_VLANs stations may exist since there's nothing else that
835 * would have removed them, but in other modes there shouldn't
836 * be any stations.
0d143fe1 837 */
d34ba216 838 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 839 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
840 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
841 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 842
df140465 843 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 844 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
845 atomic_dec(&local->iff_allmultis);
846
7be5086d 847 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 848 local->fif_pspoll--;
7be5086d
JB		 849 local->fif_probe_req--;
850 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
851 local->fif_probe_req--;
852 }
e3b90ca2 853
f142c6b9
JB		 854 if (sdata->dev) {
855 netif_addr_lock_bh(sdata->dev);
856 spin_lock_bh(&local->filter_lock);
857 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
858 sdata->dev->addr_len);
859 spin_unlock_bh(&local->filter_lock);
860 netif_addr_unlock_bh(sdata->dev);
f142c6b9 861 }
3ac64bee 862
7cbf0ba5
VN		 863 del_timer_sync(&local->dynamic_ps_timer);
864 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 865
04ecd257 866 cancel_work_sync(&sdata->recalc_smps);
dbd72850 867 sdata_lock(sdata);
59af6928 868 mutex_lock(&local->mtx);
73da7d5b 869 sdata->vif.csa_active = false;
0c21e632
LC		 870 if (sdata->vif.type == NL80211_IFTYPE_STATION)
871 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 872 if (sdata->csa_block_tx) {
873 ieee80211_wake_vif_queues(local, sdata,
874 IEEE80211_QUEUE_STOP_REASON_CSA);
875 sdata->csa_block_tx = false;
876 }
59af6928 877 mutex_unlock(&local->mtx);
dbd72850 878 sdata_unlock(sdata);
59af6928 879
73da7d5b 880 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 881
164eb02d
SW		 882 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
883
884 if (sdata->wdev.cac_started) {
d2859df5 885 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 886 WARN_ON(local->suspended);
34a3740d 887 mutex_lock(&local->mtx);
164eb02d 888 ieee80211_vif_release_channel(sdata);
34a3740d 889 mutex_unlock(&local->mtx);
d2859df5
JD		 890 cfg80211_cac_event(sdata->dev, &chandef,
891 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 892 GFP_KERNEL);
893 }
894
0d143fe1
JB		 895 /* APs need special treatment */
896 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 897 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 898
899 /* down all dependent devices, that is VLANs */
57c9fff3 900 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 901 u.vlan.list)
902 dev_close(vlan->dev);
903 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 904 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
905 /* remove all packets in parent bc_buf pointing to this dev */
906 ps = &sdata->bss->ps;
907
908 spin_lock_irqsave(&ps->bc_buf.lock, flags);
909 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
910 if (skb->dev == sdata->dev) {
911 __skb_unlink(skb, &ps->bc_buf);
912 local->total_ps_buffered--;
913 ieee80211_free_txskb(&local->hw, skb);
914 }
915 }
916 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 917 }
918
34d4bc4d
JB		 919 if (going_down)
920 local->open_count--;
0d143fe1
JB		 921
922 switch (sdata->vif.type) {
923 case NL80211_IFTYPE_AP_VLAN:
4e141dad 924 mutex_lock(&local->mtx);
0d143fe1 925 list_del(&sdata->u.vlan.list);
4e141dad 926 mutex_unlock(&local->mtx);
0c2bef46 927 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 928 /* see comment in the default case below */
929 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 930 /* no need to tell driver */
931 break;
932 case NL80211_IFTYPE_MONITOR:
d8212184 933 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 934 local->cooked_mntrs--;
935 break;
936 }
937
938 local->monitors--;
e8975581 939 if (local->monitors == 0) {
0869aea0
JB		 940 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
941 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 942 }
0d143fe1 943
85416a4f 944 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 945 break;
167e33f4
AB		 946 case NL80211_IFTYPE_NAN:
947 /* clean all the functions */
948 spin_lock_bh(&sdata->u.nan.func_lock);
949
950 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
951 idr_remove(&sdata->u.nan.function_inst_ids, i);
952 cfg80211_free_nan_func(func);
953 }
954 idr_destroy(&sdata->u.nan.function_inst_ids);
955
956 spin_unlock_bh(&sdata->u.nan.func_lock);
957 break;
f142c6b9
JB		 958 case NL80211_IFTYPE_P2P_DEVICE:
959 /* relies on synchronize_rcu() below */
0c2bef46 960 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 961 /* fall through */
0d143fe1 962 default:
0b7dff4f 963 cancel_work_sync(&sdata->work);
35f20c14
JB		 964 /*
965 * When we get here, the interface is marked down.
7907c7d3 966 * Free the remaining keys, if there are any
10b68487
FF		 967 * (which can happen in AP mode if userspace sets
968 * keys before the interface is operating, and maybe
969 * also in WDS mode)
75de9113 970 *
7907c7d3
JB		 971 * Force the key freeing to always synchronize_net()
972 * to wait for the RX path in case it is using this
10b68487 973 * interface enqueuing frames at this very time on
75de9113 974 * another CPU.
35f20c14 975 */
7907c7d3 976 ieee80211_free_keys(sdata, true);
1861b845 977 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 978 }
979
980 sdata->bss = NULL;
981
5061b0c2
JB		 982 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
983 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
984 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
985 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
986 if (info->control.vif == &sdata->vif) {
987 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 988 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 989 }
990 }
991 }
992 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 993
ba8c3d6f
FF		 994 if (sdata->vif.txq) {
995 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
996
fa962b92
MK		 997 spin_lock_bh(&fq->lock);
998 ieee80211_txq_purge(local, txqi);
999 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1000 }
1001
b2c0958b
JB		 1002 if (local->open_count == 0)
1003 ieee80211_clear_tx_pending(local);
1004
1005 /*
1006 * If the interface goes down while suspended, presumably because
1007 * the device was unplugged and that happens before our resume,
1008 * then the driver is already unconfigured and the remainder of
1009 * this function isn't needed.
1010 * XXX: what about WoWLAN? If the device has software state, e.g.
1011 * memory allocated, it might expect teardown commands from
1012 * mac80211 here?
1013 */
1014 if (local->suspended) {
1015 WARN_ON(local->wowlan);
1016 WARN_ON(rtnl_dereference(local->monitor_sdata));
1017 return;
1018 }
1019
1020 switch (sdata->vif.type) {
1021 case NL80211_IFTYPE_AP_VLAN:
1022 break;
1023 case NL80211_IFTYPE_MONITOR:
1024 if (local->monitors == 0)
1025 ieee80211_del_virtual_monitor(local);
1026
1027 mutex_lock(&local->mtx);
1028 ieee80211_recalc_idle(local);
1029 mutex_unlock(&local->mtx);
31eba5bc 1030
d8212184 1031 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1032 break;
1033
1034 /* fall through */
b2c0958b
JB		 1035 default:
1036 if (going_down)
1037 drv_remove_interface(local, sdata);
1038 }
1039
4a733ef1 1040 ieee80211_recalc_ps(local);
b2c0958b 1041
46238845
JB		 1042 if (cancel_scan)
1043 flush_delayed_work(&local->scan_work);
1044
b2c0958b
JB		 1045 if (local->open_count == 0) {
1046 ieee80211_stop_device(local);
1047
1048 /* no reconfiguring after stop! */
1049 return;
1050 }
1051
1052 /* do after stop to avoid reconfiguring when we stop anyway */
1053 ieee80211_configure_filter(local);
1054 ieee80211_hw_config(local, hw_reconf_flags);
1055
1056 if (local->monitors == local->open_count)
075e0847 1057 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1058}
1059
1060static int ieee80211_stop(struct net_device *dev)
1061{
1062 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1063
1064 ieee80211_do_stop(sdata, true);
5061b0c2 1065
0d143fe1
JB		 1066 return 0;
1067}
1068
1069static void ieee80211_set_multicast_list(struct net_device *dev)
1070{
0d143fe1 1071 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1072 struct ieee80211_local *local = sdata->local;
df140465 1073 int allmulti, sdata_allmulti;
0d143fe1
JB		 1074
1075 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1076 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1077
1078 if (allmulti != sdata_allmulti) {
1079 if (dev->flags & IFF_ALLMULTI)
1080 atomic_inc(&local->iff_allmultis);
1081 else
1082 atomic_dec(&local->iff_allmultis);
1083 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1084 }
1085
3b8d81e0 1086 spin_lock_bh(&local->filter_lock);
22bedad3 1087 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1088 spin_unlock_bh(&local->filter_lock);
3ac64bee 1089 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1090}
1091
75636525
JB		 1092/*
1093 * Called when the netdev is removed or, by the code below, before
1094 * the interface type changes.
1095 */
f142c6b9 1096static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1097{
1098 int i;
1099
75636525 1100 /* free extra data */
7907c7d3 1101 ieee80211_free_keys(sdata, false);
75636525 1102
aee14ceb
JM		 1103 ieee80211_debugfs_remove_netdev(sdata);
1104
f0706e82 1105 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1106 __skb_queue_purge(&sdata->fragments[i].skb_list);
1107 sdata->fragment_next = 0;
11a843b7 1108
b9dcf712 1109 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1110 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1111}
1112
f142c6b9
JB		 1113static void ieee80211_uninit(struct net_device *dev)
1114{
1115 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1116}
1117
cf0277e7 1118static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1119 struct sk_buff *skb,
99932d4f
DB		 1120 void *accel_priv,
1121 select_queue_fallback_t fallback)
cf0277e7
JB		 1122{
1123 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1124}
1125
5a490510
JB		 1126static struct rtnl_link_stats64 *
1127ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1128{
1129 int i;
1130
1131 for_each_possible_cpu(i) {
1132 const struct pcpu_sw_netstats *tstats;
1133 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1134 unsigned int start;
1135
1136 tstats = per_cpu_ptr(dev->tstats, i);
1137
1138 do {
1139 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1140 rx_packets = tstats->rx_packets;
1141 tx_packets = tstats->tx_packets;
1142 rx_bytes = tstats->rx_bytes;
1143 tx_bytes = tstats->tx_bytes;
1144 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1145
1146 stats->rx_packets += rx_packets;
1147 stats->tx_packets += tx_packets;
1148 stats->rx_bytes += rx_bytes;
1149 stats->tx_bytes += tx_bytes;
1150 }
1151
1152 return stats;
1153}
1154
587e729e
JB		 1155static const struct net_device_ops ieee80211_dataif_ops = {
1156 .ndo_open = ieee80211_open,
1157 .ndo_stop = ieee80211_stop,
f142c6b9 1158 .ndo_uninit = ieee80211_uninit,
587e729e 1159 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1160 .ndo_set_rx_mode = ieee80211_set_multicast_list,
47846c9b 1161 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1162 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1163 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1164};
1165
cf0277e7 1166static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1167 struct sk_buff *skb,
99932d4f
DB		 1168 void *accel_priv,
1169 select_queue_fallback_t fallback)
cf0277e7
JB		 1170{
1171 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1172 struct ieee80211_local *local = sdata->local;
1173 struct ieee80211_hdr *hdr;
1174 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1175
32c5057b 1176 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1177 return 0;
1178
1179 if (skb->len < 4 ||
b49bb574 1180 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1181 return 0; /* doesn't matter, frame will be dropped */
1182
b49bb574 1183 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1184
00e96dec 1185 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1186}
1187
587e729e
JB		 1188static const struct net_device_ops ieee80211_monitorif_ops = {
1189 .ndo_open = ieee80211_open,
1190 .ndo_stop = ieee80211_stop,
f142c6b9 1191 .ndo_uninit = ieee80211_uninit,
587e729e 1192 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1193 .ndo_set_rx_mode = ieee80211_set_multicast_list,
31eba5bc 1194 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1195 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1196 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1197};
1198
5a490510
JB		 1199static void ieee80211_if_free(struct net_device *dev)
1200{
1201 free_percpu(dev->tstats);
1202 free_netdev(dev);
1203}
1204
587e729e
JB		 1205static void ieee80211_if_setup(struct net_device *dev)
1206{
1207 ether_setup(dev);
550fd08c 1208 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1209 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1210 dev->destructor = ieee80211_if_free;
587e729e
JB		 1211}
1212
80a83cfc
MK		 1213static void ieee80211_if_setup_no_queue(struct net_device *dev)
1214{
1215 ieee80211_if_setup(dev);
1216 dev->priv_flags |= IFF_NO_QUEUE;
1217}
1218
1fa57d01
JB		 1219static void ieee80211_iface_work(struct work_struct *work)
1220{
1221 struct ieee80211_sub_if_data *sdata =
1222 container_of(work, struct ieee80211_sub_if_data, work);
1223 struct ieee80211_local *local = sdata->local;
1224 struct sk_buff *skb;
344eec67 1225 struct sta_info *sta;
c1475ca9 1226 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1227 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1228
1229 if (!ieee80211_sdata_running(sdata))
1230 return;
1231
fc58c47e 1232 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1233 return;
1234
4afaff17 1235 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1236 return;
1237
1238 /* first process frames */
1239 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1240 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1241
c1475ca9
JB		 1242 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1243 ra_tid = (void *)&skb->cb;
1244 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1245 ra_tid->tid);
1246 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1247 ra_tid = (void *)&skb->cb;
1248 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1249 ra_tid->tid);
08cf42e8
MK		 1250 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1251 rx_agg = (void *)&skb->cb;
1252 mutex_lock(&local->sta_mtx);
1253 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1254 if (sta)
08cf42e8 1255 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1256 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1257 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1258 false, true);
08cf42e8
MK		 1259 mutex_unlock(&local->sta_mtx);
1260 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1261 rx_agg = (void *)&skb->cb;
1262 mutex_lock(&local->sta_mtx);
1263 sta = sta_info_get_bss(sdata, rx_agg->addr);
1264 if (sta)
1265 __ieee80211_stop_rx_ba_session(sta,
1266 rx_agg->tid,
1267 WLAN_BACK_RECIPIENT, 0,
1268 false);
1269 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1270 } else if (ieee80211_is_action(mgmt->frame_control) &&
1271 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1272 int len = skb->len;
bed7ee6e 1273
a93e3644 1274 mutex_lock(&local->sta_mtx);
875ae5f6 1275 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1276 if (sta) {
1277 switch (mgmt->u.action.u.addba_req.action_code) {
1278 case WLAN_ACTION_ADDBA_REQ:
1279 ieee80211_process_addba_request(
1280 local, sta, mgmt, len);
1281 break;
1282 case WLAN_ACTION_ADDBA_RESP:
1283 ieee80211_process_addba_resp(local, sta,
1284 mgmt, len);
1285 break;
1286 case WLAN_ACTION_DELBA:
1287 ieee80211_process_delba(sdata, sta,
1288 mgmt, len);
1289 break;
1290 default:
1291 WARN_ON(1);
1292 break;
1293 }
1294 }
a93e3644 1295 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1296 } else if (ieee80211_is_action(mgmt->frame_control) &&
1297 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1298 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1299 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1300 struct ieee80211_rx_status *status;
1301 enum nl80211_band band;
1302 u8 opmode;
1303
1304 status = IEEE80211_SKB_RXCB(skb);
1305 band = status->band;
1306 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1307
1308 mutex_lock(&local->sta_mtx);
1309 sta = sta_info_get_bss(sdata, mgmt->sa);
1310
1311 if (sta)
1312 ieee80211_vht_handle_opmode(sdata, sta,
1313 opmode,
1314 band);
1315
1316 mutex_unlock(&local->sta_mtx);
1317 break;
1318 }
23a1f8d4
SS		 1319 case WLAN_VHT_ACTION_GROUPID_MGMT:
1320 ieee80211_process_mu_groups(sdata, mgmt);
1321 break;
1322 default:
1323 WARN_ON(1);
1324 break;
1325 }
344eec67
JB		 1326 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1327 struct ieee80211_hdr *hdr = (void *)mgmt;
1328 /*
1329 * So the frame isn't mgmt, but frame_control
1330 * is at the right place anyway, of course, so
1331 * the if statement is correct.
1332 *
1333 * Warn if we have other data frame types here,
1334 * they must not get here.
1335 */
1336 WARN_ON(hdr->frame_control &
1337 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1338 WARN_ON(!(hdr->seq_ctrl &
1339 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1340 /*
1341 * This was a fragment of a frame, received while
1342 * a block-ack session was active. That cannot be
1343 * right, so terminate the session.
1344 */
a93e3644 1345 mutex_lock(&local->sta_mtx);
875ae5f6 1346 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1347 if (sta) {
1348 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1349 IEEE80211_QOS_CTL_TID_MASK;
1350
1351 __ieee80211_stop_rx_ba_session(
1352 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1353 WLAN_REASON_QSTA_REQUIRE_SETUP,
1354 true);
344eec67 1355 }
a93e3644 1356 mutex_unlock(&local->sta_mtx);
bed7ee6e 1357 } else switch (sdata->vif.type) {
1fa57d01
JB		 1358 case NL80211_IFTYPE_STATION:
1359 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1360 break;
1361 case NL80211_IFTYPE_ADHOC:
1362 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1363 break;
1364 case NL80211_IFTYPE_MESH_POINT:
1365 if (!ieee80211_vif_is_mesh(&sdata->vif))
1366 break;
1367 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1368 break;
1369 default:
1370 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1371 break;
1372 }
36b3a628
JB		 1373
1374 kfree_skb(skb);
1fa57d01
JB		 1375 }
1376
1377 /* then other type-dependent work */
1378 switch (sdata->vif.type) {
1379 case NL80211_IFTYPE_STATION:
1380 ieee80211_sta_work(sdata);
1381 break;
1382 case NL80211_IFTYPE_ADHOC:
1383 ieee80211_ibss_work(sdata);
1384 break;
1385 case NL80211_IFTYPE_MESH_POINT:
1386 if (!ieee80211_vif_is_mesh(&sdata->vif))
1387 break;
1388 ieee80211_mesh_work(sdata);
1389 break;
239281f8
RL		 1390 case NL80211_IFTYPE_OCB:
1391 ieee80211_ocb_work(sdata);
1392 break;
1fa57d01
JB		 1393 default:
1394 break;
1395 }
1396}
1397
04ecd257
JB		 1398static void ieee80211_recalc_smps_work(struct work_struct *work)
1399{
1400 struct ieee80211_sub_if_data *sdata =
1401 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1402
1403 ieee80211_recalc_smps(sdata);
1404}
1fa57d01 1405
75636525
JB		 1406/*
1407 * Helper function to initialise an interface to a specific type.
1408 */
1409static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1410 enum nl80211_iftype type)
f0706e82 1411{
239281f8
RL		 1412 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1413 0xff, 0xff, 0xff};
1414
75636525
JB		 1415 /* clear type-dependent union */
1416 memset(&sdata->u, 0, sizeof(sdata->u));
1417
1418 /* and set some type-dependent values */
1419 sdata->vif.type = type;
2ca27bcf 1420 sdata->vif.p2p = false;
60719ffd 1421 sdata->wdev.iftype = type;
75636525 1422
a621fa4d
JB		 1423 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1424 sdata->control_port_no_encrypt = false;
2475b1cc 1425 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1426 sdata->vif.bss_conf.idle = true;
a621fa4d 1427
b53be792
SW		 1428 sdata->noack_map = 0;
1429
f142c6b9
JB		 1430 /* only monitor/p2p-device differ */
1431 if (sdata->dev) {
1432 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1433 sdata->dev->type = ARPHRD_ETHER;
1434 }
75636525 1435
35f20c14 1436 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1437 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1438 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1439 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1440 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1441 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1442
75636525 1443 switch (type) {
2ca27bcf
JB		 1444 case NL80211_IFTYPE_P2P_GO:
1445 type = NL80211_IFTYPE_AP;
1446 sdata->vif.type = type;
1447 sdata->vif.p2p = true;
1448 /* fall through */
05c914fe 1449 case NL80211_IFTYPE_AP:
d012a605 1450 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1451 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1452 INIT_WORK(&sdata->u.ap.request_smps_work,
1453 ieee80211_request_smps_ap_work);
ad2d223a 1454 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1455 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1456 break;
2ca27bcf
JB		 1457 case NL80211_IFTYPE_P2P_CLIENT:
1458 type = NL80211_IFTYPE_STATION;
1459 sdata->vif.type = type;
1460 sdata->vif.p2p = true;
1461 /* fall through */
05c914fe 1462 case NL80211_IFTYPE_STATION:
ad2d223a 1463 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1464 ieee80211_sta_setup_sdata(sdata);
472dbc45 1465 break;
6e0bd6c3 1466 case NL80211_IFTYPE_OCB:
239281f8
RL		 1467 sdata->vif.bss_conf.bssid = bssid_wildcard;
1468 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1469 break;
46900298 1470 case NL80211_IFTYPE_ADHOC:
ad2d223a 1471 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1472 ieee80211_ibss_setup_sdata(sdata);
1473 break;
05c914fe 1474 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1475 if (ieee80211_vif_is_mesh(&sdata->vif))
1476 ieee80211_mesh_init_sdata(sdata);
1477 break;
05c914fe 1478 case NL80211_IFTYPE_MONITOR:
75636525 1479 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1480 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1481 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1482 MONITOR_FLAG_OTHER_BSS;
1483 break;
05c914fe 1484 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1485 sdata->vif.bss_conf.bssid = NULL;
1486 break;
167e33f4
AB		 1487 case NL80211_IFTYPE_NAN:
1488 idr_init(&sdata->u.nan.function_inst_ids);
1489 spin_lock_init(&sdata->u.nan.func_lock);
1490 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1491 break;
05c914fe 1492 case NL80211_IFTYPE_AP_VLAN:
98104fde 1493 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1494 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1495 break;
05c914fe 1496 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1497 case NUM_NL80211_IFTYPES:
75636525
JB		 1498 BUG();
1499 break;
1500 }
1501
1502 ieee80211_debugfs_add_netdev(sdata);
1503}
1504
34d4bc4d
JB		 1505static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1506 enum nl80211_iftype type)
1507{
1508 struct ieee80211_local *local = sdata->local;
1509 int ret, err;
2ca27bcf
JB		 1510 enum nl80211_iftype internal_type = type;
1511 bool p2p = false;
34d4bc4d
JB		 1512
1513 ASSERT_RTNL();
1514
1515 if (!local->ops->change_interface)
1516 return -EBUSY;
1517
1518 switch (sdata->vif.type) {
1519 case NL80211_IFTYPE_AP:
1520 case NL80211_IFTYPE_STATION:
1521 case NL80211_IFTYPE_ADHOC:
239281f8 1522 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1523 /*
1524 * Could maybe also all others here?
1525 * Just not sure how that interacts
1526 * with the RX/config path e.g. for
1527 * mesh.
1528 */
1529 break;
1530 default:
1531 return -EBUSY;
1532 }
1533
1534 switch (type) {
1535 case NL80211_IFTYPE_AP:
1536 case NL80211_IFTYPE_STATION:
1537 case NL80211_IFTYPE_ADHOC:
239281f8 1538 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1539 /*
1540 * Could probably support everything
1541 * but WDS here (WDS do_open can fail
1542 * under memory pressure, which this
1543 * code isn't prepared to handle).
1544 */
1545 break;
2ca27bcf
JB		 1546 case NL80211_IFTYPE_P2P_CLIENT:
1547 p2p = true;
1548 internal_type = NL80211_IFTYPE_STATION;
1549 break;
1550 case NL80211_IFTYPE_P2P_GO:
1551 p2p = true;
1552 internal_type = NL80211_IFTYPE_AP;
1553 break;
34d4bc4d
JB		 1554 default:
1555 return -EBUSY;
1556 }
1557
2ca27bcf 1558 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1559 if (ret)
1560 return ret;
1561
1562 ieee80211_do_stop(sdata, false);
1563
f142c6b9 1564 ieee80211_teardown_sdata(sdata);
34d4bc4d 1565
2ca27bcf 1566 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1567 if (ret)
a9865538 1568 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1569
3a25a8c8
JB		 1570 /*
1571 * Ignore return value here, there's not much we can do since
1572 * the driver changed the interface type internally already.
1573 * The warnings will hopefully make driver authors fix it :-)
1574 */
a9865538 1575 ieee80211_check_queues(sdata, type);
3a25a8c8 1576
34d4bc4d
JB		 1577 ieee80211_setup_sdata(sdata, type);
1578
f142c6b9 1579 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1580 WARN(err, "type change: do_open returned %d", err);
1581
1582 return ret;
1583}
1584
f3947e2d 1585int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1586 enum nl80211_iftype type)
75636525 1587{
34d4bc4d
JB		 1588 int ret;
1589
f3947e2d
JB		 1590 ASSERT_RTNL();
1591
2ca27bcf 1592 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1593 return 0;
1594
34d4bc4d
JB		 1595 if (ieee80211_sdata_running(sdata)) {
1596 ret = ieee80211_runtime_change_iftype(sdata, type);
1597 if (ret)
1598 return ret;
1599 } else {
1600 /* Purge and reset type-dependent state. */
f142c6b9 1601 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1602 ieee80211_setup_sdata(sdata, type);
1603 }
75636525
JB		 1604
1605 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1606 if (type == NL80211_IFTYPE_STATION)
1607 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1608
1609 return 0;
f0706e82
JB		 1610}
1611
fa9029f8 1612static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1613 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1614{
1615 struct ieee80211_sub_if_data *sdata;
1616 u64 mask, start, addr, val, inc;
1617 u8 *m;
1618 u8 tmp_addr[ETH_ALEN];
1619 int i;
1620
1621 /* default ... something at least */
f142c6b9 1622 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1623
1624 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1625 local->hw.wiphy->n_addresses <= 1)
1626 return;
1627
fa9029f8
JB		 1628 mutex_lock(&local->iflist_mtx);
1629
1630 switch (type) {
1631 case NL80211_IFTYPE_MONITOR:
1632 /* doesn't matter */
1633 break;
1634 case NL80211_IFTYPE_WDS:
1635 case NL80211_IFTYPE_AP_VLAN:
1636 /* match up with an AP interface */
1637 list_for_each_entry(sdata, &local->interfaces, list) {
1638 if (sdata->vif.type != NL80211_IFTYPE_AP)
1639 continue;
f142c6b9 1640 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1641 break;
1642 }
1643 /* keep default if no AP interface present */
1644 break;
6d71117a
JB		 1645 case NL80211_IFTYPE_P2P_CLIENT:
1646 case NL80211_IFTYPE_P2P_GO:
30686bf7 1647 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1648 list_for_each_entry(sdata, &local->interfaces, list) {
1649 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1650 continue;
1651 if (!ieee80211_sdata_running(sdata))
1652 continue;
1653 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1654 goto out_unlock;
1655 }
1656 }
1657 /* otherwise fall through */
fa9029f8
JB		 1658 default:
1659 /* assign a new address if possible -- try n_addresses first */
1660 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1661 bool used = false;
1662
1663 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1664 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1665 sdata->vif.addr)) {
fa9029f8
JB		 1666 used = true;
1667 break;
1668 }
1669 }
1670
1671 if (!used) {
f142c6b9 1672 memcpy(perm_addr,
fa9029f8
JB		 1673 local->hw.wiphy->addresses[i].addr,
1674 ETH_ALEN);
1675 break;
1676 }
1677 }
1678
1679 /* try mask if available */
1680 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1681 break;
1682
1683 m = local->hw.wiphy->addr_mask;
1684 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1685 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1686 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1687
1688 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1689 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1690 pr_info("not contiguous\n");
fa9029f8
JB		 1691 break;
1692 }
1693
ac20976d
HS		 1694 /*
1695 * Pick address of existing interface in case user changed
1696 * MAC address manually, default to perm_addr.
1697 */
fa9029f8 1698 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1699 list_for_each_entry(sdata, &local->interfaces, list) {
1700 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1701 continue;
1702 m = sdata->vif.addr;
1703 break;
1704 }
fa9029f8
JB		 1705 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1706 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1707 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1708
1709 inc = 1ULL<<__ffs64(mask);
1710 val = (start & mask);
1711 addr = (start & ~mask) | (val & mask);
1712 do {
1713 bool used = false;
1714
1715 tmp_addr[5] = addr >> 0*8;
1716 tmp_addr[4] = addr >> 1*8;
1717 tmp_addr[3] = addr >> 2*8;
1718 tmp_addr[2] = addr >> 3*8;
1719 tmp_addr[1] = addr >> 4*8;
1720 tmp_addr[0] = addr >> 5*8;
1721
1722 val += inc;
1723
1724 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1725 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1726 used = true;
1727 break;
1728 }
1729 }
1730
1731 if (!used) {
f142c6b9 1732 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1733 break;
1734 }
1735 addr = (start & ~mask) | (val & mask);
1736 } while (addr != start);
1737
1738 break;
1739 }
1740
6d71117a 1741 out_unlock:
fa9029f8
JB		 1742 mutex_unlock(&local->iflist_mtx);
1743}
1744
3e122be0 1745int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1746 unsigned char name_assign_type,
84efbb84 1747 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1748 struct vif_params *params)
f0706e82 1749{
f142c6b9 1750 struct net_device *ndev = NULL;
f0706e82 1751 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1752 struct txq_info *txqi;
80a83cfc 1753 void (*if_setup)(struct net_device *dev);
75636525 1754 int ret, i;
ded81f6b 1755 int txqs = 1;
f0706e82
JB		 1756
1757 ASSERT_RTNL();
75636525 1758
708d50ed 1759 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1760 struct wireless_dev *wdev;
1761
1762 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1763 GFP_KERNEL);
1764 if (!sdata)
1765 return -ENOMEM;
1766 wdev = &sdata->wdev;
1767
1768 sdata->dev = NULL;
1769 strlcpy(sdata->name, name, IFNAMSIZ);
1770 ieee80211_assign_perm_addr(local, wdev->address, type);
1771 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1772 } else {
ba8c3d6f
FF		 1773 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1774 sizeof(void *));
1775 int txq_size = 0;
1776
1777 if (local->ops->wake_tx_queue)
1778 txq_size += sizeof(struct txq_info) +
1779 local->hw.txq_data_size;
1780
80a83cfc
MK		 1781 if (local->ops->wake_tx_queue)
1782 if_setup = ieee80211_if_setup_no_queue;
1783 else
1784 if_setup = ieee80211_if_setup;
1785
f142c6b9
JB		 1786 if (local->hw.queues >= IEEE80211_NUM_ACS)
1787 txqs = IEEE80211_NUM_ACS;
1788
ba8c3d6f 1789 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1790 name, name_assign_type,
80a83cfc 1791 if_setup, txqs, 1);
f142c6b9
JB		 1792 if (!ndev)
1793 return -ENOMEM;
1794 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1795
5a490510
JB		 1796 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1797 if (!ndev->tstats) {
1798 free_netdev(ndev);
1799 return -ENOMEM;
1800 }
1801
f142c6b9
JB		 1802 ndev->needed_headroom = local->tx_headroom +
1803 4*6 /* four MAC addresses */
1804 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1805 + 6 /* mesh */
1806 + 8 /* rfc1042/bridge tunnel */
1807 - ETH_HLEN /* ethernet hard_header_len */
1808 + IEEE80211_ENCRYPT_HEADROOM;
1809 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1810
1811 ret = dev_alloc_name(ndev, ndev->name);
1812 if (ret < 0) {
e6436be2 1813 ieee80211_if_free(ndev);
f142c6b9
JB		 1814 return ret;
1815 }
1816
1817 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1818 if (params && is_valid_ether_addr(params->macaddr))
1819 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1820 else
1821 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1822 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1823
1824 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1825 sdata = netdev_priv(ndev);
1826 ndev->ieee80211_ptr = &sdata->wdev;
1827 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1828 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1829
ba8c3d6f
FF		 1830 if (txq_size) {
1831 txqi = netdev_priv(ndev) + size;
fa962b92 1832 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1833 }
1834
f142c6b9
JB		 1835 sdata->dev = ndev;
1836 }
75636525
JB		 1837
1838 /* initialise type-independent data */
f0706e82 1839 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1840 sdata->local = local;
75636525
JB		 1841
1842 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1843 skb_queue_head_init(&sdata->fragments[i].skb_list);
1844
1845 INIT_LIST_HEAD(&sdata->key_list);
1846
164eb02d
SW		 1847 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1848 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1849 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1850 ieee80211_delayed_tailroom_dec);
97f97b1f 1851
57fbcce3 1852 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1853 struct ieee80211_supported_band *sband;
1854 sband = local->hw.wiphy->bands[i];
1855 sdata->rc_rateidx_mask[i] =
1856 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1857 if (sband) {
1858 __le16 cap;
1859 u16 *vht_rate_mask;
1860
19468413
SW		 1861 memcpy(sdata->rc_rateidx_mcs_mask[i],
1862 sband->ht_cap.mcs.rx_mask,
1863 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1864
1865 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1866 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1867 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1868 } else {
19468413
SW		 1869 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1870 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1871 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1872 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1873 }
37eb0b16 1874 }
75636525 1875
3a25a8c8
JB		 1876 ieee80211_set_default_queues(sdata);
1877
1ea6f9c0
JB		 1878 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1879 sdata->user_power_level = local->user_power_level;
1880
2475b1cc
MS		 1881 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1882
75636525
JB		 1883 /* setup type-dependent data */
1884 ieee80211_setup_sdata(sdata, type);
f0706e82 1885
f142c6b9
JB		 1886 if (ndev) {
1887 if (params) {
1888 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1889 if (type == NL80211_IFTYPE_STATION)
1890 sdata->u.mgd.use_4addr = params->use_4addr;
1891 }
9bc383de 1892
f142c6b9 1893 ndev->features |= local->hw.netdev_features;
72d78728 1894
b7ffbd7e
JB		 1895 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1896
9c22b4a3
JW		 1897 /* MTU range: 256 - 2304 */
1898 ndev->min_mtu = 256;
1899 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1900
f142c6b9
JB		 1901 ret = register_netdevice(ndev);
1902 if (ret) {
e6436be2 1903 ieee80211_if_free(ndev);
f142c6b9
JB		 1904 return ret;
1905 }
1906 }
f0706e82 1907
c771c9d8 1908 mutex_lock(&local->iflist_mtx);
79010420 1909 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1910 mutex_unlock(&local->iflist_mtx);
79010420 1911
84efbb84
JB		 1912 if (new_wdev)
1913 *new_wdev = &sdata->wdev;
f0706e82 1914
f0706e82 1915 return 0;
f0706e82
JB		 1916}
1917
f698d856 1918void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1919{
f0706e82 1920 ASSERT_RTNL();
11a843b7 1921
c771c9d8 1922 mutex_lock(&sdata->local->iflist_mtx);
75636525 1923 list_del_rcu(&sdata->list);
c771c9d8
JB		 1924 mutex_unlock(&sdata->local->iflist_mtx);
1925
75636525 1926 synchronize_rcu();
f142c6b9
JB		 1927
1928 if (sdata->dev) {
1929 unregister_netdevice(sdata->dev);
1930 } else {
1931 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1932 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1933 kfree(sdata);
1934 }
1935}
1936
1937void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1938{
1939 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1940 return;
1941 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1942}
1943
75636525 1944void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1945{
75636525 1946 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1947 LIST_HEAD(unreg_list);
f142c6b9 1948 LIST_HEAD(wdev_list);
f0706e82
JB		 1949
1950 ASSERT_RTNL();
1951
d8d9008c
JB		 1952 /* Before destroying the interfaces, make sure they're all stopped so
1953 * that the hardware is stopped. Otherwise, the driver might still be
1954 * iterating the interfaces during the shutdown, e.g. from a worker
1955 * or from RX processing or similar, and if it does so (using atomic
1956 * iteration) while we're manipulating the list, the iteration will
1957 * crash.
1958 *
1959 * After this, the hardware should be stopped and the driver should
1960 * have stopped all of its activities, so that we can do RCU-unaware
1961 * manipulations of the interface list below.
c8aa22db 1962 */
d8d9008c
JB		 1963 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1964
1965 WARN(local->open_count, "%s: open count remains %d\n",
1966 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1967
efe117ab 1968 mutex_lock(&local->iflist_mtx);
75636525
JB		 1969 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1970 list_del(&sdata->list);
c771c9d8 1971
f142c6b9
JB		 1972 if (sdata->dev)
1973 unregister_netdevice_queue(sdata->dev, &unreg_list);
1974 else
1975 list_add(&sdata->list, &wdev_list);
f0706e82 1976 }
efe117ab
ED		 1977 mutex_unlock(&local->iflist_mtx);
1978 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1979
1980 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1981 list_del(&sdata->list);
1982 cfg80211_unregister_wdev(&sdata->wdev);
1983 kfree(sdata);
1984 }
f0706e82 1985}
5cff20e6 1986
47846c9b 1987static int netdev_notify(struct notifier_block *nb,
351638e7 1988 unsigned long state, void *ptr)
47846c9b 1989{
351638e7 1990 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1991 struct ieee80211_sub_if_data *sdata;
1992
1993 if (state != NETDEV_CHANGENAME)
8bd811aa 1994 return NOTIFY_DONE;
47846c9b
JB		 1995
1996 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1997 return NOTIFY_DONE;
47846c9b
JB		 1998
1999 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2000 return NOTIFY_DONE;
47846c9b
JB		 2001
2002 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2003 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2004 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2005
2006 return NOTIFY_OK;
47846c9b
JB		 2007}
2008
2009static struct notifier_block mac80211_netdev_notifier = {
2010 .notifier_call = netdev_notify,
2011};
2012
2013int ieee80211_iface_init(void)
2014{
2015 return register_netdevice_notifier(&mac80211_netdev_notifier);
2016}
2017
2018void ieee80211_iface_exit(void)
2019{
2020 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2021}
72f15d53
MB		 2022
2023void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2024{
2025 if (sdata->vif.type == NL80211_IFTYPE_AP)
2026 atomic_inc(&sdata->u.ap.num_mcast_sta);
2027 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2028 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2029}
2030
2031void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2032{
2033 if (sdata->vif.type == NL80211_IFTYPE_AP)
2034 atomic_dec(&sdata->u.ap.num_mcast_sta);
2035 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2036 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2037}
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