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cfg80211/mac80211: move more combination checks to mac80211
[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>
f0706e82
JB		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
18#include <net/mac80211.h>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
1be7fe8d 27#include "rate.h"
0d143fe1 28
c771c9d8
JB		 29/**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
1ea6f9c0
JB		 45bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
46{
47 struct ieee80211_chanctx_conf *chanctx_conf;
48 int power;
49
50 rcu_read_lock();
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
52 if (!chanctx_conf) {
53 rcu_read_unlock();
54 return false;
55 }
56
0430c883 57 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 58 rcu_read_unlock();
59
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
62
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
65
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
69 return true;
70 }
71
72 return false;
73}
74
75void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
76{
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
79}
c771c9d8 80
62a40a15 81static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 82{
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
84 return 0;
85
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
88}
89
62a40a15 90static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 91{
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
93 return 0;
94
39ecc01d 95 ieee80211_flush_queues(local, NULL);
cc45ae54
JB		 96
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
99}
100
62a40a15
JB		 101static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
102 bool force_active)
cc45ae54 103{
1d5e1266 104 bool working, scanning, active;
cc45ae54 105 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 106
cc45ae54
JB		 107 lockdep_assert_held(&local->mtx);
108
62a40a15
JB		 109 active = force_active ||
110 !list_empty(&local->chanctx_list) ||
111 local->monitors;
cc45ae54 112
1d5e1266
JB		 113 working = !local->ops->remain_on_channel &&
114 !list_empty(&local->roc_list);
cc45ae54 115
f1e3e051
JB		 116 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
117 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 118
cc45ae54
JB		 119 if (working || scanning)
120 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
121 else
122 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
123
fd0f979a 124 if (active)
cc45ae54
JB		 125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
128
129 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
130
fd0f979a 131 if (working || scanning || active)
62a40a15
JB		 132 return __ieee80211_idle_off(local);
133 return __ieee80211_idle_on(local);
134}
135
136u32 ieee80211_idle_off(struct ieee80211_local *local)
137{
138 return __ieee80211_recalc_idle(local, true);
139}
140
141void ieee80211_recalc_idle(struct ieee80211_local *local)
142{
143 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 144 if (change)
145 ieee80211_hw_config(local, change);
cc45ae54
JB		 146}
147
0d143fe1
JB		 148static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
149{
09b1426e 150 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 151 return -EINVAL;
0d143fe1 152
0d143fe1
JB		 153 dev->mtu = new_mtu;
154 return 0;
155}
156
3899ba90 157static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 158 bool check_dup)
478622e8 159{
ac20976d
HS		 160 struct ieee80211_local *local = sdata->local;
161 struct ieee80211_sub_if_data *iter;
478622e8
HS		 162 u64 new, mask, tmp;
163 u8 *m;
164 int ret = 0;
165
166 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
167 return 0;
168
169 m = addr;
170 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
174 m = local->hw.wiphy->addr_mask;
175 mask = ((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
31eba5bc
FF		 179 if (!check_dup)
180 return ret;
478622e8
HS		 181
182 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 183 list_for_each_entry(iter, &local->interfaces, list) {
184 if (iter == sdata)
478622e8
HS		 185 continue;
186
3899ba90
JL		 187 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
188 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 189 continue;
190
ac20976d 191 m = iter->vif.addr;
478622e8
HS		 192 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
193 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
194 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
195
196 if ((new & ~mask) != (tmp & ~mask)) {
197 ret = -EINVAL;
198 break;
199 }
200 }
201 mutex_unlock(&local->iflist_mtx);
202
203 return ret;
204}
205
47846c9b
JB		 206static int ieee80211_change_mac(struct net_device *dev, void *addr)
207{
208 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 209 struct sockaddr *sa = addr;
31eba5bc 210 bool check_dup = true;
47846c9b
JB		 211 int ret;
212
9607e6b6 213 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 214 return -EBUSY;
215
31eba5bc
FF		 216 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
217 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
218 check_dup = false;
219
3899ba90 220 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 221 if (ret)
222 return ret;
223
fc5f7577 224 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 225
226 if (ret == 0)
fc5f7577 227 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 228
229 return ret;
230}
231
0d143fe1
JB		 232static inline int identical_mac_addr_allowed(int type1, int type2)
233{
234 return type1 == NL80211_IFTYPE_MONITOR ||
235 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 236 type1 == NL80211_IFTYPE_P2P_DEVICE ||
237 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
239 (type1 == NL80211_IFTYPE_WDS &&
240 (type2 == NL80211_IFTYPE_WDS ||
241 type2 == NL80211_IFTYPE_AP)) ||
242 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
243 (type1 == NL80211_IFTYPE_AP_VLAN &&
244 (type2 == NL80211_IFTYPE_AP ||
245 type2 == NL80211_IFTYPE_AP_VLAN));
246}
247
87490f6d
JB		 248static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
249 enum nl80211_iftype iftype)
0d143fe1 250{
b4a4bf5d 251 struct ieee80211_local *local = sdata->local;
87490f6d 252 struct ieee80211_sub_if_data *nsdata;
b6a55015 253 int ret;
0d143fe1 254
87490f6d 255 ASSERT_RTNL();
0d143fe1
JB		 256
257 /* we hold the RTNL here so can safely walk the list */
258 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 259 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 260 /*
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
264 *
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
269 */
87490f6d 270 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 271 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
272 return -EBUSY;
73da7d5b
SW		 273 /*
274 * will not add another interface while any channel
275 * switch is active.
276 */
277 if (nsdata->vif.csa_active)
278 return -EBUSY;
0d143fe1
JB		 279
280 /*
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
283 */
371a255e
JB		 284 if (!ether_addr_equal(sdata->vif.addr,
285 nsdata->vif.addr))
0d143fe1
JB		 286 continue;
287
288 /*
289 * check whether it may have the same address
290 */
87490f6d 291 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 292 nsdata->vif.type))
293 return -ENOTUNIQ;
294
295 /*
296 * can only add VLANs to enabled APs
297 */
87490f6d 298 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 299 nsdata->vif.type == NL80211_IFTYPE_AP)
300 sdata->bss = &nsdata->u.ap;
301 }
302 }
303
b6a55015
LC		 304 mutex_lock(&local->chanctx_mtx);
305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
306 mutex_unlock(&local->chanctx_mtx);
307 return ret;
87490f6d
JB		 308}
309
a9865538
JB		 310static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
311 enum nl80211_iftype iftype)
3a25a8c8
JB		 312{
313 int n_queues = sdata->local->hw.queues;
314 int i;
315
a9865538 316 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 317 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
318 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
319 IEEE80211_INVAL_HW_QUEUE))
320 return -EINVAL;
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
322 n_queues))
323 return -EINVAL;
324 }
3a25a8c8
JB		 325 }
326
a9865538
JB		 327 if ((iftype != NL80211_IFTYPE_AP &&
328 iftype != NL80211_IFTYPE_P2P_GO &&
329 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 330 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 331 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
332 return 0;
333 }
334
335 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
336 return -EINVAL;
337
338 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
339 return -EINVAL;
340
341 return 0;
342}
343
85416a4f
CL		 344void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
345 const int offset)
346{
347 struct ieee80211_local *local = sdata->local;
348 u32 flags = sdata->u.mntr_flags;
349
350#define ADJUST(_f, _s) do { \
351 if (flags & MONITOR_FLAG_##_f) \
352 local->fif_##_s += offset; \
353 } while (0)
354
355 ADJUST(FCSFAIL, fcsfail);
356 ADJUST(PLCPFAIL, plcpfail);
357 ADJUST(CONTROL, control);
358 ADJUST(CONTROL, pspoll);
359 ADJUST(OTHER_BSS, other_bss);
360
361#undef ADJUST
362}
363
3a25a8c8
JB		 364static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
365{
366 struct ieee80211_local *local = sdata->local;
367 int i;
368
369 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
370 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
371 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 372 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 373 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 374 else
375 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 376 }
377 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
378}
379
3c3e21e7 380int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 381{
382 struct ieee80211_sub_if_data *sdata;
8b305780 383 int ret;
4b6f1dd6
JB		 384
385 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
386 return 0;
387
8b305780 388 ASSERT_RTNL();
685fb72b 389
4b6f1dd6 390 if (local->monitor_sdata)
8b305780 391 return 0;
4b6f1dd6
JB		 392
393 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 394 if (!sdata)
395 return -ENOMEM;
4b6f1dd6
JB		 396
397 /* set up data */
398 sdata->local = local;
399 sdata->vif.type = NL80211_IFTYPE_MONITOR;
400 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
401 wiphy_name(local->hw.wiphy));
402
2475b1cc
MS		 403 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
404
3a25a8c8
JB		 405 ieee80211_set_default_queues(sdata);
406
4b6f1dd6
JB		 407 ret = drv_add_interface(local, sdata);
408 if (WARN_ON(ret)) {
409 /* ok .. stupid driver, it asked for this! */
410 kfree(sdata);
8b305780 411 return ret;
4b6f1dd6
JB		 412 }
413
a9865538 414 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 415 if (ret) {
416 kfree(sdata);
8b305780 417 return ret;
3a25a8c8
JB		 418 }
419
fab57a6c
JB		 420 mutex_lock(&local->iflist_mtx);
421 rcu_assign_pointer(local->monitor_sdata, sdata);
422 mutex_unlock(&local->iflist_mtx);
423
34a3740d 424 mutex_lock(&local->mtx);
4bf88530 425 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 426 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 427 mutex_unlock(&local->mtx);
55de908a 428 if (ret) {
fab57a6c 429 mutex_lock(&local->iflist_mtx);
0c2bef46 430 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 431 mutex_unlock(&local->iflist_mtx);
432 synchronize_net();
55de908a
JB		 433 drv_remove_interface(local, sdata);
434 kfree(sdata);
8b305780 435 return ret;
55de908a
JB		 436 }
437
8b305780 438 return 0;
4b6f1dd6
JB		 439}
440
3c3e21e7 441void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 442{
443 struct ieee80211_sub_if_data *sdata;
444
445 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
446 return;
447
8b305780
JB		 448 ASSERT_RTNL();
449
685fb72b 450 mutex_lock(&local->iflist_mtx);
4b6f1dd6 451
685fb72b
JB		 452 sdata = rcu_dereference_protected(local->monitor_sdata,
453 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 454 if (!sdata) {
455 mutex_unlock(&local->iflist_mtx);
456 return;
457 }
4b6f1dd6 458
0c2bef46 459 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 460 mutex_unlock(&local->iflist_mtx);
461
4b6f1dd6
JB		 462 synchronize_net();
463
34a3740d 464 mutex_lock(&local->mtx);
55de908a 465 ieee80211_vif_release_channel(sdata);
34a3740d 466 mutex_unlock(&local->mtx);
55de908a 467
4b6f1dd6
JB		 468 drv_remove_interface(local, sdata);
469
470 kfree(sdata);
471}
472
34d4bc4d
JB		 473/*
474 * NOTE: Be very careful when changing this function, it must NOT return
475 * an error on interface type changes that have been pre-checked, so most
476 * checks should be in ieee80211_check_concurrent_iface.
477 */
f142c6b9 478int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 479{
f142c6b9
JB		 480 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
481 struct net_device *dev = wdev->netdev;
87490f6d
JB		 482 struct ieee80211_local *local = sdata->local;
483 struct sta_info *sta;
484 u32 changed = 0;
485 int res;
486 u32 hw_reconf_flags = 0;
487
0d143fe1
JB		 488 switch (sdata->vif.type) {
489 case NL80211_IFTYPE_WDS:
490 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
491 return -ENOLINK;
492 break;
665c93a9
JB		 493 case NL80211_IFTYPE_AP_VLAN: {
494 struct ieee80211_sub_if_data *master;
495
0d143fe1
JB		 496 if (!sdata->bss)
497 return -ENOLINK;
665c93a9 498
0d143fe1 499 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 500
501 master = container_of(sdata->bss,
502 struct ieee80211_sub_if_data, u.ap);
503 sdata->control_port_protocol =
504 master->control_port_protocol;
505 sdata->control_port_no_encrypt =
506 master->control_port_no_encrypt;
1351c5d3
JB		 507 sdata->vif.cab_queue = master->vif.cab_queue;
508 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
509 sizeof(sdata->vif.hw_queue));
0d143fe1 510 break;
665c93a9 511 }
0d143fe1
JB		 512 case NL80211_IFTYPE_AP:
513 sdata->bss = &sdata->u.ap;
514 break;
515 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 516 case NL80211_IFTYPE_STATION:
517 case NL80211_IFTYPE_MONITOR:
518 case NL80211_IFTYPE_ADHOC:
f142c6b9 519 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 520 /* no special treatment */
521 break;
522 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 523 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 524 case NL80211_IFTYPE_P2P_CLIENT:
525 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 526 /* cannot happen */
527 WARN_ON(1);
528 break;
529 }
530
531 if (local->open_count == 0) {
24487981 532 res = drv_start(local);
0d143fe1
JB		 533 if (res)
534 goto err_del_bss;
e8975581
JB		 535 /* we're brought up, everything changes */
536 hw_reconf_flags = ~0;
1f87f7d3 537 ieee80211_led_radio(local, true);
67408c8c
JB		 538 ieee80211_mod_tpt_led_trig(local,
539 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 540 }
541
542 /*
bf533e0b
JB		 543 * Copy the hopefully now-present MAC address to
544 * this interface, if it has the special null one.
0d143fe1 545 */
f142c6b9 546 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 547 memcpy(dev->dev_addr,
548 local->hw.wiphy->perm_addr,
549 ETH_ALEN);
550 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
551
552 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 553 res = -EADDRNOTAVAIL;
554 goto err_stop;
0adc23f5 555 }
0d143fe1
JB		 556 }
557
0d143fe1
JB		 558 switch (sdata->vif.type) {
559 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 560 /* no need to tell driver, but set carrier and chanctx */
561 if (rtnl_dereference(sdata->bss->beacon)) {
562 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 563 netif_carrier_on(dev);
4d76d21b 564 } else {
3edaf3e6 565 netif_carrier_off(dev);
4d76d21b 566 }
0d143fe1
JB		 567 break;
568 case NL80211_IFTYPE_MONITOR:
569 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
570 local->cooked_mntrs++;
571 break;
572 }
573
31eba5bc
FF		 574 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
575 res = drv_add_interface(local, sdata);
576 if (res)
577 goto err_stop;
578 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 579 res = ieee80211_add_virtual_monitor(local);
580 if (res)
581 goto err_stop;
582 }
583
0d143fe1
JB		 584 /* must be before the call to ieee80211_configure_filter */
585 local->monitors++;
e8975581 586 if (local->monitors == 1) {
0869aea0
JB		 587 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
588 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 589 }
0d143fe1 590
85416a4f 591 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 592 ieee80211_configure_filter(local);
801d929c
FF		 593 mutex_lock(&local->mtx);
594 ieee80211_recalc_idle(local);
595 mutex_unlock(&local->mtx);
53e9b1de
DG		 596
597 netif_carrier_on(dev);
0d143fe1 598 break;
0d143fe1 599 default:
34d4bc4d 600 if (coming_up) {
075e0847
JB		 601 ieee80211_del_virtual_monitor(local);
602
7b7eab6f 603 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 604 if (res)
605 goto err_stop;
a9865538
JB		 606 res = ieee80211_check_queues(sdata,
607 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 608 if (res)
609 goto err_del_interface;
34d4bc4d 610 }
0d143fe1 611
29cbe68c 612 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 613 local->fif_pspoll++;
7be5086d 614 local->fif_probe_req++;
e3b90ca2 615
e3b90ca2 616 ieee80211_configure_filter(local);
7be5086d
JB		 617 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
618 local->fif_probe_req++;
a3c9aa51 619 }
e3b90ca2 620
f142c6b9
JB		 621 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
622 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 623 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 624
c405c629
JB		 625 switch (sdata->vif.type) {
626 case NL80211_IFTYPE_STATION:
627 case NL80211_IFTYPE_ADHOC:
628 case NL80211_IFTYPE_AP:
629 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 630 netif_carrier_off(dev);
c405c629 631 break;
1411af15 632 case NL80211_IFTYPE_WDS:
f142c6b9 633 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 634 break;
c405c629 635 default:
a2310824
JB		 636 /* not reached */
637 WARN_ON(1);
c405c629 638 }
59034591
EP		 639
640 /*
641 * set default queue parameters so drivers don't
642 * need to initialise the hardware if the hardware
643 * doesn't start up with sane defaults
644 */
3abead59 645 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 646 }
647
2d2080c3
JB		 648 set_bit(SDATA_STATE_RUNNING, &sdata->state);
649
0d143fe1
JB		 650 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
651 /* Create STA entry for the WDS peer */
652 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
653 GFP_KERNEL);
654 if (!sta) {
655 res = -ENOMEM;
656 goto err_del_interface;
657 }
658
83d5cc01
JB		 659 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
660 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
661 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 662
663 res = sta_info_insert(sta);
664 if (res) {
665 /* STA has been freed */
666 goto err_del_interface;
667 }
1be7fe8d
BJ		 668
669 rate_control_rate_init(sta);
1411af15 670 netif_carrier_on(dev);
f142c6b9
JB		 671 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
672 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 673 }
674
0d143fe1
JB		 675 /*
676 * set_multicast_list will be invoked by the networking core
677 * which will check whether any increments here were done in
678 * error and sync them down to the hardware as filter flags.
679 */
680 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
681 atomic_inc(&local->iff_allmultis);
682
683 if (sdata->flags & IEEE80211_SDATA_PROMISC)
684 atomic_inc(&local->iff_promiscs);
685
34d4bc4d
JB		 686 if (coming_up)
687 local->open_count++;
688
59034591 689 if (hw_reconf_flags)
e8975581 690 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 691
10f644a4 692 ieee80211_recalc_ps(local, -1);
965bedad 693
2b436312
JB		 694 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
695 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
696 /* XXX: for AP_VLAN, actually track AP queues */
697 netif_tx_start_all_queues(dev);
698 } else if (dev) {
2b730daa
JB		 699 unsigned long flags;
700 int n_acs = IEEE80211_NUM_ACS;
701 int ac;
702
703 if (local->hw.queues < IEEE80211_NUM_ACS)
704 n_acs = 1;
705
706 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
707 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
708 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
709 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
710 for (ac = 0; ac < n_acs; ac++) {
711 int ac_queue = sdata->vif.hw_queue[ac];
712
713 if (local->queue_stop_reasons[ac_queue] == 0 &&
714 skb_queue_empty(&local->pending[ac_queue]))
715 netif_start_subqueue(dev, ac);
716 }
717 }
718 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
719 }
0d143fe1
JB		 720
721 return 0;
722 err_del_interface:
7b7eab6f 723 drv_remove_interface(local, sdata);
0d143fe1 724 err_stop:
24487981
JB		 725 if (!local->open_count)
726 drv_stop(local);
0d143fe1
JB		 727 err_del_bss:
728 sdata->bss = NULL;
729 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
730 list_del(&sdata->u.vlan.list);
4d6c36fa 731 /* might already be clear but that doesn't matter */
2d2080c3 732 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 733 return res;
734}
735
34d4bc4d 736static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 737{
738 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 739 int err;
740
741 /* fail early if user set an invalid address */
2fcf2824 742 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 743 return -EADDRNOTAVAIL;
744
745 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
746 if (err)
747 return err;
748
f142c6b9 749 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 750}
751
752static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
753 bool going_down)
754{
0d143fe1 755 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 756 unsigned long flags;
757 struct sk_buff *skb, *tmp;
e8975581 758 u32 hw_reconf_flags = 0;
09f4114e 759 int i, flushed;
397a7a24 760 struct ps_data *ps;
d2859df5 761 struct cfg80211_chan_def chandef;
0d143fe1 762
c29acf20
RM		 763 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
764
e2fd5dbc 765 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 766 ieee80211_scan_cancel(local);
767
0d143fe1
JB		 768 /*
769 * Stop TX on this interface first.
770 */
f142c6b9
JB		 771 if (sdata->dev)
772 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 773
c8f994ee 774 ieee80211_roc_purge(local, sdata);
af6b6374 775
8ffcc704
EG		 776 switch (sdata->vif.type) {
777 case NL80211_IFTYPE_STATION:
572078be 778 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 779 break;
780 case NL80211_IFTYPE_ADHOC:
cd7760e6 781 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 782 break;
783 case NL80211_IFTYPE_AP:
784 cancel_work_sync(&sdata->u.ap.request_smps_work);
785 break;
786 default:
787 break;
788 }
cd7760e6 789
0d143fe1
JB		 790 /*
791 * Remove all stations associated with this interface.
792 *
793 * This must be done before calling ops->remove_interface()
794 * because otherwise we can later invoke ops->sta_notify()
795 * whenever the STAs are removed, and that invalidates driver
796 * assumptions about always getting a vif pointer that is valid
797 * (because if we remove a STA after ops->remove_interface()
798 * the driver will have removed the vif info already!)
799 *
09f4114e
JB		 800 * This is relevant only in WDS mode, in all other modes we've
801 * already removed all stations when disconnecting or similar,
802 * so warn otherwise.
0d143fe1 803 */
d34ba216 804 flushed = sta_info_flush(sdata);
09f4114e
JB		 805 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
806 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 807
afdc7c18 808 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 809 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
810 atomic_dec(&local->iff_allmultis);
811
812 if (sdata->flags & IEEE80211_SDATA_PROMISC)
813 atomic_dec(&local->iff_promiscs);
814
7be5086d 815 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 816 local->fif_pspoll--;
7be5086d
JB		 817 local->fif_probe_req--;
818 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
819 local->fif_probe_req--;
820 }
e3b90ca2 821
f142c6b9
JB		 822 if (sdata->dev) {
823 netif_addr_lock_bh(sdata->dev);
824 spin_lock_bh(&local->filter_lock);
825 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
826 sdata->dev->addr_len);
827 spin_unlock_bh(&local->filter_lock);
828 netif_addr_unlock_bh(sdata->dev);
f142c6b9 829 }
3ac64bee 830
7cbf0ba5
VN		 831 del_timer_sync(&local->dynamic_ps_timer);
832 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 833
04ecd257 834 cancel_work_sync(&sdata->recalc_smps);
dbd72850 835 sdata_lock(sdata);
73da7d5b 836 sdata->vif.csa_active = false;
dbd72850 837 sdata_unlock(sdata);
73da7d5b 838 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 839
164eb02d
SW		 840 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
841
842 if (sdata->wdev.cac_started) {
d2859df5 843 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 844 WARN_ON(local->suspended);
34a3740d 845 mutex_lock(&local->mtx);
164eb02d 846 ieee80211_vif_release_channel(sdata);
34a3740d 847 mutex_unlock(&local->mtx);
d2859df5
JD		 848 cfg80211_cac_event(sdata->dev, &chandef,
849 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 850 GFP_KERNEL);
851 }
852
0d143fe1
JB		 853 /* APs need special treatment */
854 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 855 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 856
857 /* down all dependent devices, that is VLANs */
57c9fff3 858 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 859 u.vlan.list)
860 dev_close(vlan->dev);
861 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 862 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
863 /* remove all packets in parent bc_buf pointing to this dev */
864 ps = &sdata->bss->ps;
865
866 spin_lock_irqsave(&ps->bc_buf.lock, flags);
867 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
868 if (skb->dev == sdata->dev) {
869 __skb_unlink(skb, &ps->bc_buf);
870 local->total_ps_buffered--;
871 ieee80211_free_txskb(&local->hw, skb);
872 }
873 }
874 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 875 }
876
34d4bc4d
JB		 877 if (going_down)
878 local->open_count--;
0d143fe1
JB		 879
880 switch (sdata->vif.type) {
881 case NL80211_IFTYPE_AP_VLAN:
882 list_del(&sdata->u.vlan.list);
0c2bef46 883 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 884 /* no need to tell driver */
885 break;
886 case NL80211_IFTYPE_MONITOR:
887 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
888 local->cooked_mntrs--;
889 break;
890 }
891
892 local->monitors--;
e8975581 893 if (local->monitors == 0) {
0869aea0
JB		 894 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
895 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 896 }
0d143fe1 897
85416a4f 898 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 899 break;
f142c6b9
JB		 900 case NL80211_IFTYPE_P2P_DEVICE:
901 /* relies on synchronize_rcu() below */
0c2bef46 902 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 903 /* fall through */
0d143fe1 904 default:
0b7dff4f 905 cancel_work_sync(&sdata->work);
35f20c14
JB		 906 /*
907 * When we get here, the interface is marked down.
7907c7d3
JB		 908 * Free the remaining keys, if there are any
909 * (shouldn't be, except maybe in WDS mode?)
75de9113 910 *
7907c7d3
JB		 911 * Force the key freeing to always synchronize_net()
912 * to wait for the RX path in case it is using this
913 * interface enqueuing frames * at this very time on
75de9113 914 * another CPU.
35f20c14 915 */
7907c7d3 916 ieee80211_free_keys(sdata, true);
b9dcf712 917
1861b845
JB		 918 /* fall through */
919 case NL80211_IFTYPE_AP:
920 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 921 }
922
923 sdata->bss = NULL;
924
5061b0c2
JB		 925 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
926 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
927 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
928 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
929 if (info->control.vif == &sdata->vif) {
930 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 931 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 932 }
933 }
934 }
935 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 936
b2c0958b
JB		 937 if (local->open_count == 0)
938 ieee80211_clear_tx_pending(local);
939
940 /*
941 * If the interface goes down while suspended, presumably because
942 * the device was unplugged and that happens before our resume,
943 * then the driver is already unconfigured and the remainder of
944 * this function isn't needed.
945 * XXX: what about WoWLAN? If the device has software state, e.g.
946 * memory allocated, it might expect teardown commands from
947 * mac80211 here?
948 */
949 if (local->suspended) {
950 WARN_ON(local->wowlan);
951 WARN_ON(rtnl_dereference(local->monitor_sdata));
952 return;
953 }
954
955 switch (sdata->vif.type) {
956 case NL80211_IFTYPE_AP_VLAN:
957 break;
958 case NL80211_IFTYPE_MONITOR:
959 if (local->monitors == 0)
960 ieee80211_del_virtual_monitor(local);
961
962 mutex_lock(&local->mtx);
963 ieee80211_recalc_idle(local);
964 mutex_unlock(&local->mtx);
31eba5bc
FF		 965
966 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
967 break;
968
969 /* fall through */
b2c0958b
JB		 970 default:
971 if (going_down)
972 drv_remove_interface(local, sdata);
973 }
974
975 ieee80211_recalc_ps(local, -1);
976
977 if (local->open_count == 0) {
978 ieee80211_stop_device(local);
979
980 /* no reconfiguring after stop! */
981 return;
982 }
983
984 /* do after stop to avoid reconfiguring when we stop anyway */
985 ieee80211_configure_filter(local);
986 ieee80211_hw_config(local, hw_reconf_flags);
987
988 if (local->monitors == local->open_count)
075e0847 989 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 990}
991
992static int ieee80211_stop(struct net_device *dev)
993{
994 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
995
996 ieee80211_do_stop(sdata, true);
5061b0c2 997
0d143fe1
JB		 998 return 0;
999}
1000
1001static void ieee80211_set_multicast_list(struct net_device *dev)
1002{
0d143fe1 1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1004 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1005 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1006
1007 allmulti = !!(dev->flags & IFF_ALLMULTI);
1008 promisc = !!(dev->flags & IFF_PROMISC);
1009 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1010 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1011
1012 if (allmulti != sdata_allmulti) {
1013 if (dev->flags & IFF_ALLMULTI)
1014 atomic_inc(&local->iff_allmultis);
1015 else
1016 atomic_dec(&local->iff_allmultis);
1017 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1018 }
1019
1020 if (promisc != sdata_promisc) {
1021 if (dev->flags & IFF_PROMISC)
1022 atomic_inc(&local->iff_promiscs);
1023 else
1024 atomic_dec(&local->iff_promiscs);
1025 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1026 }
3b8d81e0 1027 spin_lock_bh(&local->filter_lock);
22bedad3 1028 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1029 spin_unlock_bh(&local->filter_lock);
3ac64bee 1030 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1031}
1032
75636525
JB		 1033/*
1034 * Called when the netdev is removed or, by the code below, before
1035 * the interface type changes.
1036 */
f142c6b9 1037static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1038{
1039 int i;
1040
75636525 1041 /* free extra data */
7907c7d3 1042 ieee80211_free_keys(sdata, false);
75636525 1043
aee14ceb
JM		 1044 ieee80211_debugfs_remove_netdev(sdata);
1045
f0706e82 1046 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1047 __skb_queue_purge(&sdata->fragments[i].skb_list);
1048 sdata->fragment_next = 0;
11a843b7 1049
b9dcf712
JB		 1050 if (ieee80211_vif_is_mesh(&sdata->vif))
1051 mesh_rmc_free(sdata);
f0706e82
JB		 1052}
1053
f142c6b9
JB		 1054static void ieee80211_uninit(struct net_device *dev)
1055{
1056 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1057}
1058
cf0277e7 1059static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1060 struct sk_buff *skb,
99932d4f
DB		 1061 void *accel_priv,
1062 select_queue_fallback_t fallback)
cf0277e7
JB		 1063{
1064 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1065}
1066
587e729e
JB		 1067static const struct net_device_ops ieee80211_dataif_ops = {
1068 .ndo_open = ieee80211_open,
1069 .ndo_stop = ieee80211_stop,
f142c6b9 1070 .ndo_uninit = ieee80211_uninit,
587e729e 1071 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1072 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1073 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1074 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1075 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1076};
1077
cf0277e7 1078static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1079 struct sk_buff *skb,
99932d4f
DB		 1080 void *accel_priv,
1081 select_queue_fallback_t fallback)
cf0277e7
JB		 1082{
1083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1084 struct ieee80211_local *local = sdata->local;
1085 struct ieee80211_hdr *hdr;
1086 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1087
32c5057b 1088 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1089 return 0;
1090
1091 if (skb->len < 4 ||
b49bb574 1092 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1093 return 0; /* doesn't matter, frame will be dropped */
1094
b49bb574 1095 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1096
00e96dec 1097 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1098}
1099
587e729e
JB		 1100static const struct net_device_ops ieee80211_monitorif_ops = {
1101 .ndo_open = ieee80211_open,
1102 .ndo_stop = ieee80211_stop,
f142c6b9 1103 .ndo_uninit = ieee80211_uninit,
587e729e 1104 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1105 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1106 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1107 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1108 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1109};
1110
1111static void ieee80211_if_setup(struct net_device *dev)
1112{
1113 ether_setup(dev);
550fd08c 1114 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1115 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1116 dev->destructor = free_netdev;
1117}
1118
1fa57d01
JB		 1119static void ieee80211_iface_work(struct work_struct *work)
1120{
1121 struct ieee80211_sub_if_data *sdata =
1122 container_of(work, struct ieee80211_sub_if_data, work);
1123 struct ieee80211_local *local = sdata->local;
1124 struct sk_buff *skb;
344eec67 1125 struct sta_info *sta;
c1475ca9 1126 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1127
1128 if (!ieee80211_sdata_running(sdata))
1129 return;
1130
1131 if (local->scanning)
1132 return;
1133
1134 /*
1135 * ieee80211_queue_work() should have picked up most cases,
1136 * here we'll pick the rest.
1137 */
1138 if (WARN(local->suspended,
1139 "interface work scheduled while going to suspend\n"))
1140 return;
1141
1142 /* first process frames */
1143 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1144 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1145
c1475ca9
JB		 1146 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1147 ra_tid = (void *)&skb->cb;
1148 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1149 ra_tid->tid);
1150 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1151 ra_tid = (void *)&skb->cb;
1152 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1153 ra_tid->tid);
1154 } else if (ieee80211_is_action(mgmt->frame_control) &&
1155 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1156 int len = skb->len;
bed7ee6e 1157
a93e3644 1158 mutex_lock(&local->sta_mtx);
875ae5f6 1159 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1160 if (sta) {
1161 switch (mgmt->u.action.u.addba_req.action_code) {
1162 case WLAN_ACTION_ADDBA_REQ:
1163 ieee80211_process_addba_request(
1164 local, sta, mgmt, len);
1165 break;
1166 case WLAN_ACTION_ADDBA_RESP:
1167 ieee80211_process_addba_resp(local, sta,
1168 mgmt, len);
1169 break;
1170 case WLAN_ACTION_DELBA:
1171 ieee80211_process_delba(sdata, sta,
1172 mgmt, len);
1173 break;
1174 default:
1175 WARN_ON(1);
1176 break;
1177 }
1178 }
a93e3644 1179 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1180 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1181 struct ieee80211_hdr *hdr = (void *)mgmt;
1182 /*
1183 * So the frame isn't mgmt, but frame_control
1184 * is at the right place anyway, of course, so
1185 * the if statement is correct.
1186 *
1187 * Warn if we have other data frame types here,
1188 * they must not get here.
1189 */
1190 WARN_ON(hdr->frame_control &
1191 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1192 WARN_ON(!(hdr->seq_ctrl &
1193 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1194 /*
1195 * This was a fragment of a frame, received while
1196 * a block-ack session was active. That cannot be
1197 * right, so terminate the session.
1198 */
a93e3644 1199 mutex_lock(&local->sta_mtx);
875ae5f6 1200 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1201 if (sta) {
1202 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1203 IEEE80211_QOS_CTL_TID_MASK;
1204
1205 __ieee80211_stop_rx_ba_session(
1206 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1207 WLAN_REASON_QSTA_REQUIRE_SETUP,
1208 true);
344eec67 1209 }
a93e3644 1210 mutex_unlock(&local->sta_mtx);
bed7ee6e 1211 } else switch (sdata->vif.type) {
1fa57d01
JB		 1212 case NL80211_IFTYPE_STATION:
1213 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1214 break;
1215 case NL80211_IFTYPE_ADHOC:
1216 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1217 break;
1218 case NL80211_IFTYPE_MESH_POINT:
1219 if (!ieee80211_vif_is_mesh(&sdata->vif))
1220 break;
1221 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1222 break;
1223 default:
1224 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1225 break;
1226 }
36b3a628
JB		 1227
1228 kfree_skb(skb);
1fa57d01
JB		 1229 }
1230
1231 /* then other type-dependent work */
1232 switch (sdata->vif.type) {
1233 case NL80211_IFTYPE_STATION:
1234 ieee80211_sta_work(sdata);
1235 break;
1236 case NL80211_IFTYPE_ADHOC:
1237 ieee80211_ibss_work(sdata);
1238 break;
1239 case NL80211_IFTYPE_MESH_POINT:
1240 if (!ieee80211_vif_is_mesh(&sdata->vif))
1241 break;
1242 ieee80211_mesh_work(sdata);
1243 break;
1244 default:
1245 break;
1246 }
1247}
1248
04ecd257
JB		 1249static void ieee80211_recalc_smps_work(struct work_struct *work)
1250{
1251 struct ieee80211_sub_if_data *sdata =
1252 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1253
1254 ieee80211_recalc_smps(sdata);
1255}
1fa57d01 1256
75636525
JB		 1257/*
1258 * Helper function to initialise an interface to a specific type.
1259 */
1260static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1261 enum nl80211_iftype type)
f0706e82 1262{
75636525
JB		 1263 /* clear type-dependent union */
1264 memset(&sdata->u, 0, sizeof(sdata->u));
1265
1266 /* and set some type-dependent values */
1267 sdata->vif.type = type;
2ca27bcf 1268 sdata->vif.p2p = false;
60719ffd 1269 sdata->wdev.iftype = type;
75636525 1270
a621fa4d
JB		 1271 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1272 sdata->control_port_no_encrypt = false;
2475b1cc 1273 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1274
b53be792
SW		 1275 sdata->noack_map = 0;
1276
f142c6b9
JB		 1277 /* only monitor/p2p-device differ */
1278 if (sdata->dev) {
1279 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1280 sdata->dev->type = ARPHRD_ETHER;
1281 }
75636525 1282
35f20c14 1283 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1284 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1285 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1286 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1287
75636525 1288 switch (type) {
2ca27bcf
JB		 1289 case NL80211_IFTYPE_P2P_GO:
1290 type = NL80211_IFTYPE_AP;
1291 sdata->vif.type = type;
1292 sdata->vif.p2p = true;
1293 /* fall through */
05c914fe 1294 case NL80211_IFTYPE_AP:
d012a605 1295 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1296 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1297 INIT_WORK(&sdata->u.ap.request_smps_work,
1298 ieee80211_request_smps_ap_work);
ad2d223a 1299 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1300 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1301 break;
2ca27bcf
JB		 1302 case NL80211_IFTYPE_P2P_CLIENT:
1303 type = NL80211_IFTYPE_STATION;
1304 sdata->vif.type = type;
1305 sdata->vif.p2p = true;
1306 /* fall through */
05c914fe 1307 case NL80211_IFTYPE_STATION:
ad2d223a 1308 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1309 ieee80211_sta_setup_sdata(sdata);
472dbc45 1310 break;
46900298 1311 case NL80211_IFTYPE_ADHOC:
ad2d223a 1312 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1313 ieee80211_ibss_setup_sdata(sdata);
1314 break;
05c914fe 1315 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1316 if (ieee80211_vif_is_mesh(&sdata->vif))
1317 ieee80211_mesh_init_sdata(sdata);
1318 break;
05c914fe 1319 case NL80211_IFTYPE_MONITOR:
75636525 1320 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1321 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1322 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1323 MONITOR_FLAG_OTHER_BSS;
1324 break;
05c914fe 1325 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1326 sdata->vif.bss_conf.bssid = NULL;
1327 break;
05c914fe 1328 case NL80211_IFTYPE_AP_VLAN:
98104fde 1329 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1330 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1331 break;
05c914fe 1332 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1333 case NUM_NL80211_IFTYPES:
75636525
JB		 1334 BUG();
1335 break;
1336 }
1337
1338 ieee80211_debugfs_add_netdev(sdata);
1339}
1340
34d4bc4d
JB		 1341static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1342 enum nl80211_iftype type)
1343{
1344 struct ieee80211_local *local = sdata->local;
1345 int ret, err;
2ca27bcf
JB		 1346 enum nl80211_iftype internal_type = type;
1347 bool p2p = false;
34d4bc4d
JB		 1348
1349 ASSERT_RTNL();
1350
1351 if (!local->ops->change_interface)
1352 return -EBUSY;
1353
1354 switch (sdata->vif.type) {
1355 case NL80211_IFTYPE_AP:
1356 case NL80211_IFTYPE_STATION:
1357 case NL80211_IFTYPE_ADHOC:
1358 /*
1359 * Could maybe also all others here?
1360 * Just not sure how that interacts
1361 * with the RX/config path e.g. for
1362 * mesh.
1363 */
1364 break;
1365 default:
1366 return -EBUSY;
1367 }
1368
1369 switch (type) {
1370 case NL80211_IFTYPE_AP:
1371 case NL80211_IFTYPE_STATION:
1372 case NL80211_IFTYPE_ADHOC:
1373 /*
1374 * Could probably support everything
1375 * but WDS here (WDS do_open can fail
1376 * under memory pressure, which this
1377 * code isn't prepared to handle).
1378 */
1379 break;
2ca27bcf
JB		 1380 case NL80211_IFTYPE_P2P_CLIENT:
1381 p2p = true;
1382 internal_type = NL80211_IFTYPE_STATION;
1383 break;
1384 case NL80211_IFTYPE_P2P_GO:
1385 p2p = true;
1386 internal_type = NL80211_IFTYPE_AP;
1387 break;
34d4bc4d
JB		 1388 default:
1389 return -EBUSY;
1390 }
1391
2ca27bcf 1392 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1393 if (ret)
1394 return ret;
1395
1396 ieee80211_do_stop(sdata, false);
1397
f142c6b9 1398 ieee80211_teardown_sdata(sdata);
34d4bc4d 1399
2ca27bcf 1400 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1401 if (ret)
a9865538 1402 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1403
3a25a8c8
JB		 1404 /*
1405 * Ignore return value here, there's not much we can do since
1406 * the driver changed the interface type internally already.
1407 * The warnings will hopefully make driver authors fix it :-)
1408 */
a9865538 1409 ieee80211_check_queues(sdata, type);
3a25a8c8 1410
34d4bc4d
JB		 1411 ieee80211_setup_sdata(sdata, type);
1412
f142c6b9 1413 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1414 WARN(err, "type change: do_open returned %d", err);
1415
1416 return ret;
1417}
1418
f3947e2d 1419int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1420 enum nl80211_iftype type)
75636525 1421{
34d4bc4d
JB		 1422 int ret;
1423
f3947e2d
JB		 1424 ASSERT_RTNL();
1425
2ca27bcf 1426 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1427 return 0;
1428
34d4bc4d
JB		 1429 if (ieee80211_sdata_running(sdata)) {
1430 ret = ieee80211_runtime_change_iftype(sdata, type);
1431 if (ret)
1432 return ret;
1433 } else {
1434 /* Purge and reset type-dependent state. */
f142c6b9 1435 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1436 ieee80211_setup_sdata(sdata, type);
1437 }
75636525
JB		 1438
1439 /* reset some values that shouldn't be kept across type changes */
75636525 1440 sdata->drop_unencrypted = 0;
9bc383de
JB		 1441 if (type == NL80211_IFTYPE_STATION)
1442 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1443
1444 return 0;
f0706e82
JB		 1445}
1446
fa9029f8 1447static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1448 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1449{
1450 struct ieee80211_sub_if_data *sdata;
1451 u64 mask, start, addr, val, inc;
1452 u8 *m;
1453 u8 tmp_addr[ETH_ALEN];
1454 int i;
1455
1456 /* default ... something at least */
f142c6b9 1457 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1458
1459 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1460 local->hw.wiphy->n_addresses <= 1)
1461 return;
1462
fa9029f8
JB		 1463 mutex_lock(&local->iflist_mtx);
1464
1465 switch (type) {
1466 case NL80211_IFTYPE_MONITOR:
1467 /* doesn't matter */
1468 break;
1469 case NL80211_IFTYPE_WDS:
1470 case NL80211_IFTYPE_AP_VLAN:
1471 /* match up with an AP interface */
1472 list_for_each_entry(sdata, &local->interfaces, list) {
1473 if (sdata->vif.type != NL80211_IFTYPE_AP)
1474 continue;
f142c6b9 1475 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1476 break;
1477 }
1478 /* keep default if no AP interface present */
1479 break;
6d71117a
JB		 1480 case NL80211_IFTYPE_P2P_CLIENT:
1481 case NL80211_IFTYPE_P2P_GO:
1482 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1483 list_for_each_entry(sdata, &local->interfaces, list) {
1484 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1485 continue;
1486 if (!ieee80211_sdata_running(sdata))
1487 continue;
1488 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1489 goto out_unlock;
1490 }
1491 }
1492 /* otherwise fall through */
fa9029f8
JB		 1493 default:
1494 /* assign a new address if possible -- try n_addresses first */
1495 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1496 bool used = false;
1497
1498 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1499 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1500 sdata->vif.addr)) {
fa9029f8
JB		 1501 used = true;
1502 break;
1503 }
1504 }
1505
1506 if (!used) {
f142c6b9 1507 memcpy(perm_addr,
fa9029f8
JB		 1508 local->hw.wiphy->addresses[i].addr,
1509 ETH_ALEN);
1510 break;
1511 }
1512 }
1513
1514 /* try mask if available */
1515 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1516 break;
1517
1518 m = local->hw.wiphy->addr_mask;
1519 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1520 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1521 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1522
1523 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1524 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1525 pr_info("not contiguous\n");
fa9029f8
JB		 1526 break;
1527 }
1528
ac20976d
HS		 1529 /*
1530 * Pick address of existing interface in case user changed
1531 * MAC address manually, default to perm_addr.
1532 */
fa9029f8 1533 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1534 list_for_each_entry(sdata, &local->interfaces, list) {
1535 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1536 continue;
1537 m = sdata->vif.addr;
1538 break;
1539 }
fa9029f8
JB		 1540 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1541 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1542 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1543
1544 inc = 1ULL<<__ffs64(mask);
1545 val = (start & mask);
1546 addr = (start & ~mask) | (val & mask);
1547 do {
1548 bool used = false;
1549
1550 tmp_addr[5] = addr >> 0*8;
1551 tmp_addr[4] = addr >> 1*8;
1552 tmp_addr[3] = addr >> 2*8;
1553 tmp_addr[2] = addr >> 3*8;
1554 tmp_addr[1] = addr >> 4*8;
1555 tmp_addr[0] = addr >> 5*8;
1556
1557 val += inc;
1558
1559 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1560 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1561 used = true;
1562 break;
1563 }
1564 }
1565
1566 if (!used) {
f142c6b9 1567 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1568 break;
1569 }
1570 addr = (start & ~mask) | (val & mask);
1571 } while (addr != start);
1572
1573 break;
1574 }
1575
6d71117a 1576 out_unlock:
fa9029f8
JB		 1577 mutex_unlock(&local->iflist_mtx);
1578}
1579
3e122be0 1580int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1581 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1582 struct vif_params *params)
f0706e82 1583{
f142c6b9 1584 struct net_device *ndev = NULL;
f0706e82 1585 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1586 int ret, i;
ded81f6b 1587 int txqs = 1;
f0706e82
JB		 1588
1589 ASSERT_RTNL();
75636525 1590
f142c6b9
JB		 1591 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1592 struct wireless_dev *wdev;
1593
1594 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1595 GFP_KERNEL);
1596 if (!sdata)
1597 return -ENOMEM;
1598 wdev = &sdata->wdev;
1599
1600 sdata->dev = NULL;
1601 strlcpy(sdata->name, name, IFNAMSIZ);
1602 ieee80211_assign_perm_addr(local, wdev->address, type);
1603 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1604 } else {
1605 if (local->hw.queues >= IEEE80211_NUM_ACS)
1606 txqs = IEEE80211_NUM_ACS;
1607
1608 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1609 local->hw.vif_data_size,
1610 name, ieee80211_if_setup, txqs, 1);
1611 if (!ndev)
1612 return -ENOMEM;
1613 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1614
1615 ndev->needed_headroom = local->tx_headroom +
1616 4*6 /* four MAC addresses */
1617 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1618 + 6 /* mesh */
1619 + 8 /* rfc1042/bridge tunnel */
1620 - ETH_HLEN /* ethernet hard_header_len */
1621 + IEEE80211_ENCRYPT_HEADROOM;
1622 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1623
1624 ret = dev_alloc_name(ndev, ndev->name);
1625 if (ret < 0) {
1626 free_netdev(ndev);
1627 return ret;
1628 }
1629
1630 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1631 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1632 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1633
1634 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1635 sdata = netdev_priv(ndev);
1636 ndev->ieee80211_ptr = &sdata->wdev;
1637 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1638 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1639
1640 sdata->dev = ndev;
1641 }
75636525
JB		 1642
1643 /* initialise type-independent data */
f0706e82 1644 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1645 sdata->local = local;
75636525
JB		 1646
1647 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1648 skb_queue_head_init(&sdata->fragments[i].skb_list);
1649
1650 INIT_LIST_HEAD(&sdata->key_list);
1651
164eb02d
SW		 1652 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1653 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1654 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1655 ieee80211_delayed_tailroom_dec);
97f97b1f 1656
37eb0b16
JM		 1657 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1658 struct ieee80211_supported_band *sband;
1659 sband = local->hw.wiphy->bands[i];
1660 sdata->rc_rateidx_mask[i] =
1661 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1662 if (sband)
1663 memcpy(sdata->rc_rateidx_mcs_mask[i],
1664 sband->ht_cap.mcs.rx_mask,
1665 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1666 else
1667 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1668 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1669 }
75636525 1670
3a25a8c8
JB		 1671 ieee80211_set_default_queues(sdata);
1672
1ea6f9c0
JB		 1673 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1674 sdata->user_power_level = local->user_power_level;
1675
2475b1cc
MS		 1676 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1677
75636525
JB		 1678 /* setup type-dependent data */
1679 ieee80211_setup_sdata(sdata, type);
f0706e82 1680
f142c6b9
JB		 1681 if (ndev) {
1682 if (params) {
1683 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1684 if (type == NL80211_IFTYPE_STATION)
1685 sdata->u.mgd.use_4addr = params->use_4addr;
1686 }
9bc383de 1687
f142c6b9 1688 ndev->features |= local->hw.netdev_features;
72d78728 1689
f142c6b9
JB		 1690 ret = register_netdevice(ndev);
1691 if (ret) {
1692 free_netdev(ndev);
1693 return ret;
1694 }
1695 }
f0706e82 1696
c771c9d8 1697 mutex_lock(&local->iflist_mtx);
79010420 1698 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1699 mutex_unlock(&local->iflist_mtx);
79010420 1700
84efbb84
JB		 1701 if (new_wdev)
1702 *new_wdev = &sdata->wdev;
f0706e82 1703
f0706e82 1704 return 0;
f0706e82
JB		 1705}
1706
f698d856 1707void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1708{
f0706e82 1709 ASSERT_RTNL();
11a843b7 1710
c771c9d8 1711 mutex_lock(&sdata->local->iflist_mtx);
75636525 1712 list_del_rcu(&sdata->list);
c771c9d8
JB		 1713 mutex_unlock(&sdata->local->iflist_mtx);
1714
75636525 1715 synchronize_rcu();
f142c6b9
JB		 1716
1717 if (sdata->dev) {
1718 unregister_netdevice(sdata->dev);
1719 } else {
1720 cfg80211_unregister_wdev(&sdata->wdev);
1721 kfree(sdata);
1722 }
1723}
1724
1725void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1726{
1727 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1728 return;
1729 ieee80211_do_stop(sdata, true);
1730 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1731}
1732
75636525
JB		 1733/*
1734 * Remove all interfaces, may only be called at hardware unregistration
1735 * time because it doesn't do RCU-safe list removals.
1736 */
1737void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1738{
75636525 1739 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1740 LIST_HEAD(unreg_list);
f142c6b9 1741 LIST_HEAD(wdev_list);
f0706e82
JB		 1742
1743 ASSERT_RTNL();
1744
c8aa22db
JB		 1745 /*
1746 * Close all AP_VLAN interfaces first, as otherwise they
1747 * might be closed while the AP interface they belong to
1748 * is closed, causing unregister_netdevice_many() to crash.
1749 */
1750 list_for_each_entry(sdata, &local->interfaces, list)
1751 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1752 dev_close(sdata->dev);
1753
efe117ab 1754 mutex_lock(&local->iflist_mtx);
75636525
JB		 1755 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1756 list_del(&sdata->list);
c771c9d8 1757
f142c6b9
JB		 1758 if (sdata->dev)
1759 unregister_netdevice_queue(sdata->dev, &unreg_list);
1760 else
1761 list_add(&sdata->list, &wdev_list);
f0706e82 1762 }
efe117ab
ED		 1763 mutex_unlock(&local->iflist_mtx);
1764 unregister_netdevice_many(&unreg_list);
5f04d506 1765 list_del(&unreg_list);
f142c6b9
JB		 1766
1767 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1768 list_del(&sdata->list);
1769 cfg80211_unregister_wdev(&sdata->wdev);
1770 kfree(sdata);
1771 }
f0706e82 1772}
5cff20e6 1773
47846c9b 1774static int netdev_notify(struct notifier_block *nb,
351638e7 1775 unsigned long state, void *ptr)
47846c9b 1776{
351638e7 1777 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1778 struct ieee80211_sub_if_data *sdata;
1779
1780 if (state != NETDEV_CHANGENAME)
1781 return 0;
1782
1783 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1784 return 0;
1785
1786 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1787 return 0;
1788
1789 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1790
2f5265e6 1791 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1792
1793 ieee80211_debugfs_rename_netdev(sdata);
1794 return 0;
1795}
1796
1797static struct notifier_block mac80211_netdev_notifier = {
1798 .notifier_call = netdev_notify,
1799};
1800
1801int ieee80211_iface_init(void)
1802{
1803 return register_netdevice_notifier(&mac80211_netdev_notifier);
1804}
1805
1806void ieee80211_iface_exit(void)
1807{
1808 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1809}
Linux kernel - Deliverables
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