projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: remove unnecessary iflist_mtx locking
[linux-2.6-block.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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{
fd0f979a 104 bool working = false, scanning, active;
cc45ae54
JB		 105 unsigned int led_trig_start = 0, led_trig_stop = 0;
106 struct ieee80211_roc_work *roc;
107
cc45ae54
JB		 108 lockdep_assert_held(&local->mtx);
109
62a40a15
JB		 110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
112 local->monitors;
cc45ae54
JB		 113
114 if (!local->ops->remain_on_channel) {
115 list_for_each_entry(roc, &local->roc_list, list) {
116 working = true;
fd0f979a 117 break;
cc45ae54
JB		 118 }
119 }
120
f1e3e051
JB		 121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 123
cc45ae54
JB		 124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128
fd0f979a 129 if (active)
cc45ae54
JB		 130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 else
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135
fd0f979a 136 if (working || scanning || active)
62a40a15
JB		 137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
139}
140
141u32 ieee80211_idle_off(struct ieee80211_local *local)
142{
143 return __ieee80211_recalc_idle(local, true);
144}
145
146void ieee80211_recalc_idle(struct ieee80211_local *local)
147{
148 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 149 if (change)
150 ieee80211_hw_config(local, change);
cc45ae54
JB		 151}
152
0d143fe1
JB		 153static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
154{
09b1426e 155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 156 return -EINVAL;
0d143fe1 157
0d143fe1
JB		 158 dev->mtu = new_mtu;
159 return 0;
160}
161
3899ba90 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 163 bool check_dup)
478622e8 164{
ac20976d
HS		 165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
478622e8
HS		 167 u64 new, mask, tmp;
168 u8 *m;
169 int ret = 0;
170
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
172 return 0;
173
174 m = addr;
175 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183
31eba5bc
FF		 184 if (!check_dup)
185 return ret;
478622e8
HS		 186
187 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
478622e8
HS		 190 continue;
191
3899ba90
JL		 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 194 continue;
195
ac20976d 196 m = iter->vif.addr;
478622e8
HS		 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206 mutex_unlock(&local->iflist_mtx);
207
208 return ret;
209}
210
47846c9b
JB		 211static int ieee80211_change_mac(struct net_device *dev, void *addr)
212{
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 214 struct sockaddr *sa = addr;
31eba5bc 215 bool check_dup = true;
47846c9b
JB		 216 int ret;
217
9607e6b6 218 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 219 return -EBUSY;
220
31eba5bc
FF		 221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
222 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
223 check_dup = false;
224
3899ba90 225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 226 if (ret)
227 return ret;
228
fc5f7577 229 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 230
231 if (ret == 0)
fc5f7577 232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 233
234 return ret;
235}
236
0d143fe1
JB		 237static inline int identical_mac_addr_allowed(int type1, int type2)
238{
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
251}
252
87490f6d
JB		 253static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
0d143fe1 255{
b4a4bf5d 256 struct ieee80211_local *local = sdata->local;
87490f6d 257 struct ieee80211_sub_if_data *nsdata;
0d143fe1 258
87490f6d 259 ASSERT_RTNL();
0d143fe1
JB		 260
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 263 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
87490f6d 274 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
73da7d5b
SW		 277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
0d143fe1
JB		 283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
371a255e
JB		 288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
0d143fe1
JB		 290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
87490f6d 295 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
87490f6d 302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
87490f6d
JB		 308 return 0;
309}
310
a9865538
JB		 311static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
3a25a8c8
JB		 313{
314 int n_queues = sdata->local->hw.queues;
315 int i;
316
a9865538 317 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 318 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
319 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
320 IEEE80211_INVAL_HW_QUEUE))
321 return -EINVAL;
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
323 n_queues))
324 return -EINVAL;
325 }
3a25a8c8
JB		 326 }
327
a9865538
JB		 328 if ((iftype != NL80211_IFTYPE_AP &&
329 iftype != NL80211_IFTYPE_P2P_GO &&
330 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 331 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 332 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
333 return 0;
334 }
335
336 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338
339 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
340 return -EINVAL;
341
342 return 0;
343}
344
85416a4f
CL		 345void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
346 const int offset)
347{
348 struct ieee80211_local *local = sdata->local;
349 u32 flags = sdata->u.mntr_flags;
350
351#define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
354 } while (0)
355
356 ADJUST(FCSFAIL, fcsfail);
357 ADJUST(PLCPFAIL, plcpfail);
358 ADJUST(CONTROL, control);
359 ADJUST(CONTROL, pspoll);
360 ADJUST(OTHER_BSS, other_bss);
361
362#undef ADJUST
363}
364
3a25a8c8
JB		 365static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
366{
367 struct ieee80211_local *local = sdata->local;
368 int i;
369
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
372 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 373 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 374 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 375 else
376 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 377 }
378 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
379}
380
3c3e21e7 381int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 382{
383 struct ieee80211_sub_if_data *sdata;
8b305780 384 int ret;
4b6f1dd6
JB		 385
386 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
387 return 0;
388
8b305780 389 ASSERT_RTNL();
685fb72b 390
4b6f1dd6 391 if (local->monitor_sdata)
8b305780 392 return 0;
4b6f1dd6
JB		 393
394 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 395 if (!sdata)
396 return -ENOMEM;
4b6f1dd6
JB		 397
398 /* set up data */
399 sdata->local = local;
400 sdata->vif.type = NL80211_IFTYPE_MONITOR;
401 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
402 wiphy_name(local->hw.wiphy));
403
2475b1cc
MS		 404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
405
3a25a8c8
JB		 406 ieee80211_set_default_queues(sdata);
407
4b6f1dd6
JB		 408 ret = drv_add_interface(local, sdata);
409 if (WARN_ON(ret)) {
410 /* ok .. stupid driver, it asked for this! */
411 kfree(sdata);
8b305780 412 return ret;
4b6f1dd6
JB		 413 }
414
a9865538 415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 416 if (ret) {
417 kfree(sdata);
8b305780 418 return ret;
3a25a8c8
JB		 419 }
420
4bf88530 421 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 422 IEEE80211_CHANCTX_EXCLUSIVE);
423 if (ret) {
424 drv_remove_interface(local, sdata);
425 kfree(sdata);
8b305780 426 return ret;
55de908a
JB		 427 }
428
8b305780 429 mutex_lock(&local->iflist_mtx);
4b6f1dd6 430 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 431 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 432
433 return 0;
4b6f1dd6
JB		 434}
435
3c3e21e7 436void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 437{
438 struct ieee80211_sub_if_data *sdata;
439
440 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
441 return;
442
8b305780
JB		 443 ASSERT_RTNL();
444
685fb72b 445 mutex_lock(&local->iflist_mtx);
4b6f1dd6 446
685fb72b
JB		 447 sdata = rcu_dereference_protected(local->monitor_sdata,
448 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 449 if (!sdata) {
450 mutex_unlock(&local->iflist_mtx);
451 return;
452 }
4b6f1dd6
JB		 453
454 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 455 mutex_unlock(&local->iflist_mtx);
456
4b6f1dd6
JB		 457 synchronize_net();
458
55de908a
JB		 459 ieee80211_vif_release_channel(sdata);
460
4b6f1dd6
JB		 461 drv_remove_interface(local, sdata);
462
463 kfree(sdata);
464}
465
34d4bc4d
JB		 466/*
467 * NOTE: Be very careful when changing this function, it must NOT return
468 * an error on interface type changes that have been pre-checked, so most
469 * checks should be in ieee80211_check_concurrent_iface.
470 */
f142c6b9 471int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 472{
f142c6b9
JB		 473 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
474 struct net_device *dev = wdev->netdev;
87490f6d
JB		 475 struct ieee80211_local *local = sdata->local;
476 struct sta_info *sta;
477 u32 changed = 0;
478 int res;
479 u32 hw_reconf_flags = 0;
480
0d143fe1
JB		 481 switch (sdata->vif.type) {
482 case NL80211_IFTYPE_WDS:
483 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
484 return -ENOLINK;
485 break;
665c93a9
JB		 486 case NL80211_IFTYPE_AP_VLAN: {
487 struct ieee80211_sub_if_data *master;
488
0d143fe1
JB		 489 if (!sdata->bss)
490 return -ENOLINK;
665c93a9 491
0d143fe1 492 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 493
494 master = container_of(sdata->bss,
495 struct ieee80211_sub_if_data, u.ap);
496 sdata->control_port_protocol =
497 master->control_port_protocol;
498 sdata->control_port_no_encrypt =
499 master->control_port_no_encrypt;
1351c5d3
JB		 500 sdata->vif.cab_queue = master->vif.cab_queue;
501 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
502 sizeof(sdata->vif.hw_queue));
0d143fe1 503 break;
665c93a9 504 }
0d143fe1
JB		 505 case NL80211_IFTYPE_AP:
506 sdata->bss = &sdata->u.ap;
507 break;
508 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 509 case NL80211_IFTYPE_STATION:
510 case NL80211_IFTYPE_MONITOR:
511 case NL80211_IFTYPE_ADHOC:
f142c6b9 512 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 513 /* no special treatment */
514 break;
515 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 516 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 517 case NL80211_IFTYPE_P2P_CLIENT:
518 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 519 /* cannot happen */
520 WARN_ON(1);
521 break;
522 }
523
524 if (local->open_count == 0) {
24487981 525 res = drv_start(local);
0d143fe1
JB		 526 if (res)
527 goto err_del_bss;
e8975581
JB		 528 /* we're brought up, everything changes */
529 hw_reconf_flags = ~0;
1f87f7d3 530 ieee80211_led_radio(local, true);
67408c8c
JB		 531 ieee80211_mod_tpt_led_trig(local,
532 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 533 }
534
535 /*
bf533e0b
JB		 536 * Copy the hopefully now-present MAC address to
537 * this interface, if it has the special null one.
0d143fe1 538 */
f142c6b9 539 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 540 memcpy(dev->dev_addr,
541 local->hw.wiphy->perm_addr,
542 ETH_ALEN);
543 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
544
545 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 546 res = -EADDRNOTAVAIL;
547 goto err_stop;
0adc23f5 548 }
0d143fe1
JB		 549 }
550
0d143fe1
JB		 551 switch (sdata->vif.type) {
552 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 553 /* no need to tell driver, but set carrier and chanctx */
554 if (rtnl_dereference(sdata->bss->beacon)) {
555 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 556 netif_carrier_on(dev);
4d76d21b 557 } else {
3edaf3e6 558 netif_carrier_off(dev);
4d76d21b 559 }
0d143fe1
JB		 560 break;
561 case NL80211_IFTYPE_MONITOR:
562 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
563 local->cooked_mntrs++;
564 break;
565 }
566
31eba5bc
FF		 567 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
568 res = drv_add_interface(local, sdata);
569 if (res)
570 goto err_stop;
571 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 572 res = ieee80211_add_virtual_monitor(local);
573 if (res)
574 goto err_stop;
575 }
576
0d143fe1
JB		 577 /* must be before the call to ieee80211_configure_filter */
578 local->monitors++;
e8975581 579 if (local->monitors == 1) {
0869aea0
JB		 580 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
581 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 582 }
0d143fe1 583
85416a4f 584 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 585 ieee80211_configure_filter(local);
801d929c
FF		 586 mutex_lock(&local->mtx);
587 ieee80211_recalc_idle(local);
588 mutex_unlock(&local->mtx);
53e9b1de
DG		 589
590 netif_carrier_on(dev);
0d143fe1 591 break;
0d143fe1 592 default:
34d4bc4d 593 if (coming_up) {
075e0847
JB		 594 ieee80211_del_virtual_monitor(local);
595
7b7eab6f 596 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 597 if (res)
598 goto err_stop;
a9865538
JB		 599 res = ieee80211_check_queues(sdata,
600 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 601 if (res)
602 goto err_del_interface;
34d4bc4d 603 }
0d143fe1 604
29cbe68c 605 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 606 local->fif_pspoll++;
7be5086d 607 local->fif_probe_req++;
e3b90ca2 608
e3b90ca2 609 ieee80211_configure_filter(local);
7be5086d
JB		 610 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
611 local->fif_probe_req++;
a3c9aa51 612 }
e3b90ca2 613
f142c6b9
JB		 614 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
615 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 616 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 617
c405c629
JB		 618 switch (sdata->vif.type) {
619 case NL80211_IFTYPE_STATION:
620 case NL80211_IFTYPE_ADHOC:
621 case NL80211_IFTYPE_AP:
622 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 623 netif_carrier_off(dev);
c405c629 624 break;
1411af15 625 case NL80211_IFTYPE_WDS:
f142c6b9 626 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 627 break;
c405c629 628 default:
a2310824
JB		 629 /* not reached */
630 WARN_ON(1);
c405c629 631 }
59034591
EP		 632
633 /*
634 * set default queue parameters so drivers don't
635 * need to initialise the hardware if the hardware
636 * doesn't start up with sane defaults
637 */
3abead59 638 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 639 }
640
2d2080c3
JB		 641 set_bit(SDATA_STATE_RUNNING, &sdata->state);
642
0d143fe1
JB		 643 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
644 /* Create STA entry for the WDS peer */
645 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
646 GFP_KERNEL);
647 if (!sta) {
648 res = -ENOMEM;
649 goto err_del_interface;
650 }
651
83d5cc01
JB		 652 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
653 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
654 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 655
656 res = sta_info_insert(sta);
657 if (res) {
658 /* STA has been freed */
659 goto err_del_interface;
660 }
1be7fe8d
BJ		 661
662 rate_control_rate_init(sta);
1411af15 663 netif_carrier_on(dev);
f142c6b9
JB		 664 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
665 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 666 }
667
0d143fe1
JB		 668 /*
669 * set_multicast_list will be invoked by the networking core
670 * which will check whether any increments here were done in
671 * error and sync them down to the hardware as filter flags.
672 */
673 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
674 atomic_inc(&local->iff_allmultis);
675
676 if (sdata->flags & IEEE80211_SDATA_PROMISC)
677 atomic_inc(&local->iff_promiscs);
678
34d4bc4d
JB		 679 if (coming_up)
680 local->open_count++;
681
59034591 682 if (hw_reconf_flags)
e8975581 683 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 684
10f644a4 685 ieee80211_recalc_ps(local, -1);
965bedad 686
2b436312
JB		 687 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
688 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
689 /* XXX: for AP_VLAN, actually track AP queues */
690 netif_tx_start_all_queues(dev);
691 } else if (dev) {
2b730daa
JB		 692 unsigned long flags;
693 int n_acs = IEEE80211_NUM_ACS;
694 int ac;
695
696 if (local->hw.queues < IEEE80211_NUM_ACS)
697 n_acs = 1;
698
699 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
700 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
701 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
702 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
703 for (ac = 0; ac < n_acs; ac++) {
704 int ac_queue = sdata->vif.hw_queue[ac];
705
706 if (local->queue_stop_reasons[ac_queue] == 0 &&
707 skb_queue_empty(&local->pending[ac_queue]))
708 netif_start_subqueue(dev, ac);
709 }
710 }
711 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
712 }
0d143fe1
JB		 713
714 return 0;
715 err_del_interface:
7b7eab6f 716 drv_remove_interface(local, sdata);
0d143fe1 717 err_stop:
24487981
JB		 718 if (!local->open_count)
719 drv_stop(local);
0d143fe1
JB		 720 err_del_bss:
721 sdata->bss = NULL;
722 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
723 list_del(&sdata->u.vlan.list);
4d6c36fa 724 /* might already be clear but that doesn't matter */
2d2080c3 725 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 726 return res;
727}
728
34d4bc4d 729static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 730{
731 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 732 int err;
733
734 /* fail early if user set an invalid address */
2fcf2824 735 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 736 return -EADDRNOTAVAIL;
737
738 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
739 if (err)
740 return err;
741
f142c6b9 742 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 743}
744
745static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
746 bool going_down)
747{
0d143fe1 748 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 749 unsigned long flags;
750 struct sk_buff *skb, *tmp;
e8975581 751 u32 hw_reconf_flags = 0;
09f4114e 752 int i, flushed;
397a7a24 753 struct ps_data *ps;
d2859df5 754 struct cfg80211_chan_def chandef;
0d143fe1 755
c29acf20
RM		 756 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
757
e2fd5dbc 758 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 759 ieee80211_scan_cancel(local);
760
0d143fe1
JB		 761 /*
762 * Stop TX on this interface first.
763 */
f142c6b9
JB		 764 if (sdata->dev)
765 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 766
c8f994ee 767 ieee80211_roc_purge(local, sdata);
af6b6374 768
572078be
JB		 769 if (sdata->vif.type == NL80211_IFTYPE_STATION)
770 ieee80211_mgd_stop(sdata);
771
cd7760e6
SW		 772 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
773 ieee80211_ibss_stop(sdata);
774
775
0d143fe1
JB		 776 /*
777 * Remove all stations associated with this interface.
778 *
779 * This must be done before calling ops->remove_interface()
780 * because otherwise we can later invoke ops->sta_notify()
781 * whenever the STAs are removed, and that invalidates driver
782 * assumptions about always getting a vif pointer that is valid
783 * (because if we remove a STA after ops->remove_interface()
784 * the driver will have removed the vif info already!)
785 *
09f4114e
JB		 786 * This is relevant only in WDS mode, in all other modes we've
787 * already removed all stations when disconnecting or similar,
788 * so warn otherwise.
0d143fe1 789 */
d34ba216 790 flushed = sta_info_flush(sdata);
09f4114e
JB		 791 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
792 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 793
afdc7c18 794 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 795 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
796 atomic_dec(&local->iff_allmultis);
797
798 if (sdata->flags & IEEE80211_SDATA_PROMISC)
799 atomic_dec(&local->iff_promiscs);
800
7be5086d 801 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 802 local->fif_pspoll--;
7be5086d
JB		 803 local->fif_probe_req--;
804 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
805 local->fif_probe_req--;
806 }
e3b90ca2 807
f142c6b9
JB		 808 if (sdata->dev) {
809 netif_addr_lock_bh(sdata->dev);
810 spin_lock_bh(&local->filter_lock);
811 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
812 sdata->dev->addr_len);
813 spin_unlock_bh(&local->filter_lock);
814 netif_addr_unlock_bh(sdata->dev);
f142c6b9 815 }
3ac64bee 816
7cbf0ba5
VN		 817 del_timer_sync(&local->dynamic_ps_timer);
818 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 819
04ecd257 820 cancel_work_sync(&sdata->recalc_smps);
73da7d5b
SW		 821 sdata->vif.csa_active = false;
822 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 823
164eb02d
SW		 824 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
825
826 if (sdata->wdev.cac_started) {
d2859df5 827 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 828 WARN_ON(local->suspended);
164eb02d 829 ieee80211_vif_release_channel(sdata);
d2859df5
JD		 830 cfg80211_cac_event(sdata->dev, &chandef,
831 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 832 GFP_KERNEL);
833 }
834
0d143fe1
JB		 835 /* APs need special treatment */
836 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 837 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 838
839 /* down all dependent devices, that is VLANs */
57c9fff3 840 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 841 u.vlan.list)
842 dev_close(vlan->dev);
843 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 844 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
845 /* remove all packets in parent bc_buf pointing to this dev */
846 ps = &sdata->bss->ps;
847
848 spin_lock_irqsave(&ps->bc_buf.lock, flags);
849 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
850 if (skb->dev == sdata->dev) {
851 __skb_unlink(skb, &ps->bc_buf);
852 local->total_ps_buffered--;
853 ieee80211_free_txskb(&local->hw, skb);
854 }
855 }
856 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 857 }
858
34d4bc4d
JB		 859 if (going_down)
860 local->open_count--;
0d143fe1
JB		 861
862 switch (sdata->vif.type) {
863 case NL80211_IFTYPE_AP_VLAN:
864 list_del(&sdata->u.vlan.list);
4d76d21b 865 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 866 /* no need to tell driver */
867 break;
868 case NL80211_IFTYPE_MONITOR:
869 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
870 local->cooked_mntrs--;
871 break;
872 }
873
874 local->monitors--;
e8975581 875 if (local->monitors == 0) {
0869aea0
JB		 876 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
877 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 878 }
0d143fe1 879
85416a4f 880 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 881 break;
f142c6b9
JB		 882 case NL80211_IFTYPE_P2P_DEVICE:
883 /* relies on synchronize_rcu() below */
884 rcu_assign_pointer(local->p2p_sdata, NULL);
885 /* fall through */
0d143fe1 886 default:
0b7dff4f 887 cancel_work_sync(&sdata->work);
35f20c14
JB		 888 /*
889 * When we get here, the interface is marked down.
7907c7d3
JB		 890 * Free the remaining keys, if there are any
891 * (shouldn't be, except maybe in WDS mode?)
75de9113 892 *
7907c7d3
JB		 893 * Force the key freeing to always synchronize_net()
894 * to wait for the RX path in case it is using this
895 * interface enqueuing frames * at this very time on
896 * another CPU.
35f20c14 897 */
7907c7d3 898 ieee80211_free_keys(sdata, true);
b9dcf712 899
1861b845
JB		 900 /* fall through */
901 case NL80211_IFTYPE_AP:
902 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 903 }
904
905 sdata->bss = NULL;
906
5061b0c2
JB		 907 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
908 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
909 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
910 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
911 if (info->control.vif == &sdata->vif) {
912 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 913 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 914 }
915 }
916 }
917 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 918
b2c0958b
JB		 919 if (local->open_count == 0)
920 ieee80211_clear_tx_pending(local);
921
922 /*
923 * If the interface goes down while suspended, presumably because
924 * the device was unplugged and that happens before our resume,
925 * then the driver is already unconfigured and the remainder of
926 * this function isn't needed.
927 * XXX: what about WoWLAN? If the device has software state, e.g.
928 * memory allocated, it might expect teardown commands from
929 * mac80211 here?
930 */
931 if (local->suspended) {
932 WARN_ON(local->wowlan);
933 WARN_ON(rtnl_dereference(local->monitor_sdata));
934 return;
935 }
936
937 switch (sdata->vif.type) {
938 case NL80211_IFTYPE_AP_VLAN:
939 break;
940 case NL80211_IFTYPE_MONITOR:
941 if (local->monitors == 0)
942 ieee80211_del_virtual_monitor(local);
943
944 mutex_lock(&local->mtx);
945 ieee80211_recalc_idle(local);
946 mutex_unlock(&local->mtx);
31eba5bc
FF		 947
948 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
949 break;
950
951 /* fall through */
b2c0958b
JB		 952 default:
953 if (going_down)
954 drv_remove_interface(local, sdata);
955 }
956
957 ieee80211_recalc_ps(local, -1);
958
959 if (local->open_count == 0) {
960 ieee80211_stop_device(local);
961
962 /* no reconfiguring after stop! */
963 return;
964 }
965
966 /* do after stop to avoid reconfiguring when we stop anyway */
967 ieee80211_configure_filter(local);
968 ieee80211_hw_config(local, hw_reconf_flags);
969
970 if (local->monitors == local->open_count)
075e0847 971 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 972}
973
974static int ieee80211_stop(struct net_device *dev)
975{
976 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
977
978 ieee80211_do_stop(sdata, true);
5061b0c2 979
0d143fe1
JB		 980 return 0;
981}
982
983static void ieee80211_set_multicast_list(struct net_device *dev)
984{
0d143fe1 985 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 986 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 987 int allmulti, promisc, sdata_allmulti, sdata_promisc;
988
989 allmulti = !!(dev->flags & IFF_ALLMULTI);
990 promisc = !!(dev->flags & IFF_PROMISC);
991 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
992 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
993
994 if (allmulti != sdata_allmulti) {
995 if (dev->flags & IFF_ALLMULTI)
996 atomic_inc(&local->iff_allmultis);
997 else
998 atomic_dec(&local->iff_allmultis);
999 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1000 }
1001
1002 if (promisc != sdata_promisc) {
1003 if (dev->flags & IFF_PROMISC)
1004 atomic_inc(&local->iff_promiscs);
1005 else
1006 atomic_dec(&local->iff_promiscs);
1007 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1008 }
3b8d81e0 1009 spin_lock_bh(&local->filter_lock);
22bedad3 1010 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1011 spin_unlock_bh(&local->filter_lock);
3ac64bee 1012 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1013}
1014
75636525
JB		 1015/*
1016 * Called when the netdev is removed or, by the code below, before
1017 * the interface type changes.
1018 */
f142c6b9 1019static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1020{
1021 int i;
1022
75636525 1023 /* free extra data */
7907c7d3 1024 ieee80211_free_keys(sdata, false);
75636525 1025
aee14ceb
JM		 1026 ieee80211_debugfs_remove_netdev(sdata);
1027
f0706e82 1028 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1029 __skb_queue_purge(&sdata->fragments[i].skb_list);
1030 sdata->fragment_next = 0;
11a843b7 1031
b9dcf712
JB		 1032 if (ieee80211_vif_is_mesh(&sdata->vif))
1033 mesh_rmc_free(sdata);
f0706e82
JB		 1034}
1035
f142c6b9
JB		 1036static void ieee80211_uninit(struct net_device *dev)
1037{
1038 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1039}
1040
cf0277e7
JB		 1041static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1042 struct sk_buff *skb)
1043{
1044 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1045}
1046
587e729e
JB		 1047static const struct net_device_ops ieee80211_dataif_ops = {
1048 .ndo_open = ieee80211_open,
1049 .ndo_stop = ieee80211_stop,
f142c6b9 1050 .ndo_uninit = ieee80211_uninit,
587e729e 1051 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1052 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1053 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1054 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1055 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1056};
1057
cf0277e7
JB		 1058static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1059 struct sk_buff *skb)
1060{
1061 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1062 struct ieee80211_local *local = sdata->local;
1063 struct ieee80211_hdr *hdr;
1064 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1065
32c5057b 1066 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1067 return 0;
1068
1069 if (skb->len < 4 ||
b49bb574 1070 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1071 return 0; /* doesn't matter, frame will be dropped */
1072
b49bb574 1073 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1074
00e96dec 1075 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1076}
1077
587e729e
JB		 1078static const struct net_device_ops ieee80211_monitorif_ops = {
1079 .ndo_open = ieee80211_open,
1080 .ndo_stop = ieee80211_stop,
f142c6b9 1081 .ndo_uninit = ieee80211_uninit,
587e729e 1082 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1083 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1084 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1085 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1086 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1087};
1088
1089static void ieee80211_if_setup(struct net_device *dev)
1090{
1091 ether_setup(dev);
550fd08c 1092 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1093 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1094 dev->destructor = free_netdev;
1095}
1096
1fa57d01
JB		 1097static void ieee80211_iface_work(struct work_struct *work)
1098{
1099 struct ieee80211_sub_if_data *sdata =
1100 container_of(work, struct ieee80211_sub_if_data, work);
1101 struct ieee80211_local *local = sdata->local;
1102 struct sk_buff *skb;
344eec67 1103 struct sta_info *sta;
c1475ca9 1104 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1105
1106 if (!ieee80211_sdata_running(sdata))
1107 return;
1108
1109 if (local->scanning)
1110 return;
1111
1112 /*
1113 * ieee80211_queue_work() should have picked up most cases,
1114 * here we'll pick the rest.
1115 */
1116 if (WARN(local->suspended,
1117 "interface work scheduled while going to suspend\n"))
1118 return;
1119
1120 /* first process frames */
1121 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1122 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1123
c1475ca9
JB		 1124 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1125 ra_tid = (void *)&skb->cb;
1126 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1127 ra_tid->tid);
1128 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1129 ra_tid = (void *)&skb->cb;
1130 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1131 ra_tid->tid);
1132 } else if (ieee80211_is_action(mgmt->frame_control) &&
1133 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1134 int len = skb->len;
bed7ee6e 1135
a93e3644 1136 mutex_lock(&local->sta_mtx);
875ae5f6 1137 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1138 if (sta) {
1139 switch (mgmt->u.action.u.addba_req.action_code) {
1140 case WLAN_ACTION_ADDBA_REQ:
1141 ieee80211_process_addba_request(
1142 local, sta, mgmt, len);
1143 break;
1144 case WLAN_ACTION_ADDBA_RESP:
1145 ieee80211_process_addba_resp(local, sta,
1146 mgmt, len);
1147 break;
1148 case WLAN_ACTION_DELBA:
1149 ieee80211_process_delba(sdata, sta,
1150 mgmt, len);
1151 break;
1152 default:
1153 WARN_ON(1);
1154 break;
1155 }
1156 }
a93e3644 1157 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1158 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1159 struct ieee80211_hdr *hdr = (void *)mgmt;
1160 /*
1161 * So the frame isn't mgmt, but frame_control
1162 * is at the right place anyway, of course, so
1163 * the if statement is correct.
1164 *
1165 * Warn if we have other data frame types here,
1166 * they must not get here.
1167 */
1168 WARN_ON(hdr->frame_control &
1169 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1170 WARN_ON(!(hdr->seq_ctrl &
1171 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1172 /*
1173 * This was a fragment of a frame, received while
1174 * a block-ack session was active. That cannot be
1175 * right, so terminate the session.
1176 */
a93e3644 1177 mutex_lock(&local->sta_mtx);
875ae5f6 1178 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1179 if (sta) {
1180 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1181 IEEE80211_QOS_CTL_TID_MASK;
1182
1183 __ieee80211_stop_rx_ba_session(
1184 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1185 WLAN_REASON_QSTA_REQUIRE_SETUP,
1186 true);
344eec67 1187 }
a93e3644 1188 mutex_unlock(&local->sta_mtx);
bed7ee6e 1189 } else switch (sdata->vif.type) {
1fa57d01
JB		 1190 case NL80211_IFTYPE_STATION:
1191 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1192 break;
1193 case NL80211_IFTYPE_ADHOC:
1194 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1195 break;
1196 case NL80211_IFTYPE_MESH_POINT:
1197 if (!ieee80211_vif_is_mesh(&sdata->vif))
1198 break;
1199 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1200 break;
1201 default:
1202 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1203 break;
1204 }
36b3a628
JB		 1205
1206 kfree_skb(skb);
1fa57d01
JB		 1207 }
1208
1209 /* then other type-dependent work */
1210 switch (sdata->vif.type) {
1211 case NL80211_IFTYPE_STATION:
1212 ieee80211_sta_work(sdata);
1213 break;
1214 case NL80211_IFTYPE_ADHOC:
1215 ieee80211_ibss_work(sdata);
1216 break;
1217 case NL80211_IFTYPE_MESH_POINT:
1218 if (!ieee80211_vif_is_mesh(&sdata->vif))
1219 break;
1220 ieee80211_mesh_work(sdata);
1221 break;
1222 default:
1223 break;
1224 }
1225}
1226
04ecd257
JB		 1227static void ieee80211_recalc_smps_work(struct work_struct *work)
1228{
1229 struct ieee80211_sub_if_data *sdata =
1230 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1231
1232 ieee80211_recalc_smps(sdata);
1233}
1fa57d01 1234
75636525
JB		 1235/*
1236 * Helper function to initialise an interface to a specific type.
1237 */
1238static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1239 enum nl80211_iftype type)
f0706e82 1240{
75636525
JB		 1241 /* clear type-dependent union */
1242 memset(&sdata->u, 0, sizeof(sdata->u));
1243
1244 /* and set some type-dependent values */
1245 sdata->vif.type = type;
2ca27bcf 1246 sdata->vif.p2p = false;
60719ffd 1247 sdata->wdev.iftype = type;
75636525 1248
a621fa4d
JB		 1249 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1250 sdata->control_port_no_encrypt = false;
2475b1cc 1251 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1252
b53be792
SW		 1253 sdata->noack_map = 0;
1254
f142c6b9
JB		 1255 /* only monitor/p2p-device differ */
1256 if (sdata->dev) {
1257 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1258 sdata->dev->type = ARPHRD_ETHER;
1259 }
75636525 1260
35f20c14 1261 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1262 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1263 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1264 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1265
75636525 1266 switch (type) {
2ca27bcf
JB		 1267 case NL80211_IFTYPE_P2P_GO:
1268 type = NL80211_IFTYPE_AP;
1269 sdata->vif.type = type;
1270 sdata->vif.p2p = true;
1271 /* fall through */
05c914fe 1272 case NL80211_IFTYPE_AP:
d012a605 1273 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1274 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1275 INIT_WORK(&sdata->u.ap.request_smps_work,
1276 ieee80211_request_smps_ap_work);
ad2d223a 1277 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1278 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1279 break;
2ca27bcf
JB		 1280 case NL80211_IFTYPE_P2P_CLIENT:
1281 type = NL80211_IFTYPE_STATION;
1282 sdata->vif.type = type;
1283 sdata->vif.p2p = true;
1284 /* fall through */
05c914fe 1285 case NL80211_IFTYPE_STATION:
ad2d223a 1286 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1287 ieee80211_sta_setup_sdata(sdata);
472dbc45 1288 break;
46900298 1289 case NL80211_IFTYPE_ADHOC:
ad2d223a 1290 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1291 ieee80211_ibss_setup_sdata(sdata);
1292 break;
05c914fe 1293 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1294 if (ieee80211_vif_is_mesh(&sdata->vif))
1295 ieee80211_mesh_init_sdata(sdata);
1296 break;
05c914fe 1297 case NL80211_IFTYPE_MONITOR:
75636525 1298 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1299 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1300 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1301 MONITOR_FLAG_OTHER_BSS;
1302 break;
05c914fe 1303 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1304 sdata->vif.bss_conf.bssid = NULL;
1305 break;
05c914fe 1306 case NL80211_IFTYPE_AP_VLAN:
98104fde 1307 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1308 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1309 break;
05c914fe 1310 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1311 case NUM_NL80211_IFTYPES:
75636525
JB		 1312 BUG();
1313 break;
1314 }
1315
1316 ieee80211_debugfs_add_netdev(sdata);
1317}
1318
34d4bc4d
JB		 1319static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1320 enum nl80211_iftype type)
1321{
1322 struct ieee80211_local *local = sdata->local;
1323 int ret, err;
2ca27bcf
JB		 1324 enum nl80211_iftype internal_type = type;
1325 bool p2p = false;
34d4bc4d
JB		 1326
1327 ASSERT_RTNL();
1328
1329 if (!local->ops->change_interface)
1330 return -EBUSY;
1331
1332 switch (sdata->vif.type) {
1333 case NL80211_IFTYPE_AP:
1334 case NL80211_IFTYPE_STATION:
1335 case NL80211_IFTYPE_ADHOC:
1336 /*
1337 * Could maybe also all others here?
1338 * Just not sure how that interacts
1339 * with the RX/config path e.g. for
1340 * mesh.
1341 */
1342 break;
1343 default:
1344 return -EBUSY;
1345 }
1346
1347 switch (type) {
1348 case NL80211_IFTYPE_AP:
1349 case NL80211_IFTYPE_STATION:
1350 case NL80211_IFTYPE_ADHOC:
1351 /*
1352 * Could probably support everything
1353 * but WDS here (WDS do_open can fail
1354 * under memory pressure, which this
1355 * code isn't prepared to handle).
1356 */
1357 break;
2ca27bcf
JB		 1358 case NL80211_IFTYPE_P2P_CLIENT:
1359 p2p = true;
1360 internal_type = NL80211_IFTYPE_STATION;
1361 break;
1362 case NL80211_IFTYPE_P2P_GO:
1363 p2p = true;
1364 internal_type = NL80211_IFTYPE_AP;
1365 break;
34d4bc4d
JB		 1366 default:
1367 return -EBUSY;
1368 }
1369
2ca27bcf 1370 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1371 if (ret)
1372 return ret;
1373
1374 ieee80211_do_stop(sdata, false);
1375
f142c6b9 1376 ieee80211_teardown_sdata(sdata);
34d4bc4d 1377
2ca27bcf 1378 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1379 if (ret)
a9865538 1380 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1381
3a25a8c8
JB		 1382 /*
1383 * Ignore return value here, there's not much we can do since
1384 * the driver changed the interface type internally already.
1385 * The warnings will hopefully make driver authors fix it :-)
1386 */
a9865538 1387 ieee80211_check_queues(sdata, type);
3a25a8c8 1388
34d4bc4d
JB		 1389 ieee80211_setup_sdata(sdata, type);
1390
f142c6b9 1391 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1392 WARN(err, "type change: do_open returned %d", err);
1393
1394 return ret;
1395}
1396
f3947e2d 1397int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1398 enum nl80211_iftype type)
75636525 1399{
34d4bc4d
JB		 1400 int ret;
1401
f3947e2d
JB		 1402 ASSERT_RTNL();
1403
2ca27bcf 1404 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1405 return 0;
1406
34d4bc4d
JB		 1407 if (ieee80211_sdata_running(sdata)) {
1408 ret = ieee80211_runtime_change_iftype(sdata, type);
1409 if (ret)
1410 return ret;
1411 } else {
1412 /* Purge and reset type-dependent state. */
f142c6b9 1413 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1414 ieee80211_setup_sdata(sdata, type);
1415 }
75636525
JB		 1416
1417 /* reset some values that shouldn't be kept across type changes */
75636525 1418 sdata->drop_unencrypted = 0;
9bc383de
JB		 1419 if (type == NL80211_IFTYPE_STATION)
1420 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1421
1422 return 0;
f0706e82
JB		 1423}
1424
fa9029f8 1425static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1426 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1427{
1428 struct ieee80211_sub_if_data *sdata;
1429 u64 mask, start, addr, val, inc;
1430 u8 *m;
1431 u8 tmp_addr[ETH_ALEN];
1432 int i;
1433
1434 /* default ... something at least */
f142c6b9 1435 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1436
1437 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1438 local->hw.wiphy->n_addresses <= 1)
1439 return;
1440
fa9029f8
JB		 1441 mutex_lock(&local->iflist_mtx);
1442
1443 switch (type) {
1444 case NL80211_IFTYPE_MONITOR:
1445 /* doesn't matter */
1446 break;
1447 case NL80211_IFTYPE_WDS:
1448 case NL80211_IFTYPE_AP_VLAN:
1449 /* match up with an AP interface */
1450 list_for_each_entry(sdata, &local->interfaces, list) {
1451 if (sdata->vif.type != NL80211_IFTYPE_AP)
1452 continue;
f142c6b9 1453 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1454 break;
1455 }
1456 /* keep default if no AP interface present */
1457 break;
6d71117a
JB		 1458 case NL80211_IFTYPE_P2P_CLIENT:
1459 case NL80211_IFTYPE_P2P_GO:
1460 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1461 list_for_each_entry(sdata, &local->interfaces, list) {
1462 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1463 continue;
1464 if (!ieee80211_sdata_running(sdata))
1465 continue;
1466 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1467 goto out_unlock;
1468 }
1469 }
1470 /* otherwise fall through */
fa9029f8
JB		 1471 default:
1472 /* assign a new address if possible -- try n_addresses first */
1473 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1474 bool used = false;
1475
1476 list_for_each_entry(sdata, &local->interfaces, list) {
1477 if (memcmp(local->hw.wiphy->addresses[i].addr,
1478 sdata->vif.addr, ETH_ALEN) == 0) {
1479 used = true;
1480 break;
1481 }
1482 }
1483
1484 if (!used) {
f142c6b9 1485 memcpy(perm_addr,
fa9029f8
JB		 1486 local->hw.wiphy->addresses[i].addr,
1487 ETH_ALEN);
1488 break;
1489 }
1490 }
1491
1492 /* try mask if available */
1493 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1494 break;
1495
1496 m = local->hw.wiphy->addr_mask;
1497 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1498 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1499 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1500
1501 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1502 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1503 pr_info("not contiguous\n");
fa9029f8
JB		 1504 break;
1505 }
1506
ac20976d
HS		 1507 /*
1508 * Pick address of existing interface in case user changed
1509 * MAC address manually, default to perm_addr.
1510 */
fa9029f8 1511 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1512 list_for_each_entry(sdata, &local->interfaces, list) {
1513 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1514 continue;
1515 m = sdata->vif.addr;
1516 break;
1517 }
fa9029f8
JB		 1518 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1519 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1520 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1521
1522 inc = 1ULL<<__ffs64(mask);
1523 val = (start & mask);
1524 addr = (start & ~mask) | (val & mask);
1525 do {
1526 bool used = false;
1527
1528 tmp_addr[5] = addr >> 0*8;
1529 tmp_addr[4] = addr >> 1*8;
1530 tmp_addr[3] = addr >> 2*8;
1531 tmp_addr[2] = addr >> 3*8;
1532 tmp_addr[1] = addr >> 4*8;
1533 tmp_addr[0] = addr >> 5*8;
1534
1535 val += inc;
1536
1537 list_for_each_entry(sdata, &local->interfaces, list) {
1538 if (memcmp(tmp_addr, sdata->vif.addr,
1539 ETH_ALEN) == 0) {
1540 used = true;
1541 break;
1542 }
1543 }
1544
1545 if (!used) {
f142c6b9 1546 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1547 break;
1548 }
1549 addr = (start & ~mask) | (val & mask);
1550 } while (addr != start);
1551
1552 break;
1553 }
1554
6d71117a 1555 out_unlock:
fa9029f8
JB		 1556 mutex_unlock(&local->iflist_mtx);
1557}
1558
3e122be0 1559int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1560 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1561 struct vif_params *params)
f0706e82 1562{
f142c6b9 1563 struct net_device *ndev = NULL;
f0706e82 1564 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1565 int ret, i;
ded81f6b 1566 int txqs = 1;
f0706e82
JB		 1567
1568 ASSERT_RTNL();
75636525 1569
f142c6b9
JB		 1570 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1571 struct wireless_dev *wdev;
1572
1573 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1574 GFP_KERNEL);
1575 if (!sdata)
1576 return -ENOMEM;
1577 wdev = &sdata->wdev;
1578
1579 sdata->dev = NULL;
1580 strlcpy(sdata->name, name, IFNAMSIZ);
1581 ieee80211_assign_perm_addr(local, wdev->address, type);
1582 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1583 } else {
1584 if (local->hw.queues >= IEEE80211_NUM_ACS)
1585 txqs = IEEE80211_NUM_ACS;
1586
1587 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1588 local->hw.vif_data_size,
1589 name, ieee80211_if_setup, txqs, 1);
1590 if (!ndev)
1591 return -ENOMEM;
1592 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1593
1594 ndev->needed_headroom = local->tx_headroom +
1595 4*6 /* four MAC addresses */
1596 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1597 + 6 /* mesh */
1598 + 8 /* rfc1042/bridge tunnel */
1599 - ETH_HLEN /* ethernet hard_header_len */
1600 + IEEE80211_ENCRYPT_HEADROOM;
1601 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1602
1603 ret = dev_alloc_name(ndev, ndev->name);
1604 if (ret < 0) {
1605 free_netdev(ndev);
1606 return ret;
1607 }
1608
1609 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1610 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1611 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1612
1613 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1614 sdata = netdev_priv(ndev);
1615 ndev->ieee80211_ptr = &sdata->wdev;
1616 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1617 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1618
1619 sdata->dev = ndev;
1620 }
75636525
JB		 1621
1622 /* initialise type-independent data */
f0706e82 1623 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1624 sdata->local = local;
75636525
JB		 1625
1626 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1627 skb_queue_head_init(&sdata->fragments[i].skb_list);
1628
1629 INIT_LIST_HEAD(&sdata->key_list);
1630
164eb02d
SW		 1631 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1632 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1633 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1634 ieee80211_delayed_tailroom_dec);
97f97b1f 1635
37eb0b16
JM		 1636 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1637 struct ieee80211_supported_band *sband;
1638 sband = local->hw.wiphy->bands[i];
1639 sdata->rc_rateidx_mask[i] =
1640 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1641 if (sband)
1642 memcpy(sdata->rc_rateidx_mcs_mask[i],
1643 sband->ht_cap.mcs.rx_mask,
1644 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1645 else
1646 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1647 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1648 }
75636525 1649
3a25a8c8
JB		 1650 ieee80211_set_default_queues(sdata);
1651
1ea6f9c0
JB		 1652 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1653 sdata->user_power_level = local->user_power_level;
1654
2475b1cc
MS		 1655 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1656
75636525
JB		 1657 /* setup type-dependent data */
1658 ieee80211_setup_sdata(sdata, type);
f0706e82 1659
f142c6b9
JB		 1660 if (ndev) {
1661 if (params) {
1662 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1663 if (type == NL80211_IFTYPE_STATION)
1664 sdata->u.mgd.use_4addr = params->use_4addr;
1665 }
9bc383de 1666
f142c6b9 1667 ndev->features |= local->hw.netdev_features;
72d78728 1668
f142c6b9
JB		 1669 ret = register_netdevice(ndev);
1670 if (ret) {
1671 free_netdev(ndev);
1672 return ret;
1673 }
1674 }
f0706e82 1675
c771c9d8 1676 mutex_lock(&local->iflist_mtx);
79010420 1677 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1678 mutex_unlock(&local->iflist_mtx);
79010420 1679
84efbb84
JB		 1680 if (new_wdev)
1681 *new_wdev = &sdata->wdev;
f0706e82 1682
f0706e82 1683 return 0;
f0706e82
JB		 1684}
1685
f698d856 1686void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1687{
f0706e82 1688 ASSERT_RTNL();
11a843b7 1689
c771c9d8 1690 mutex_lock(&sdata->local->iflist_mtx);
75636525 1691 list_del_rcu(&sdata->list);
c771c9d8
JB		 1692 mutex_unlock(&sdata->local->iflist_mtx);
1693
75636525 1694 synchronize_rcu();
f142c6b9
JB		 1695
1696 if (sdata->dev) {
1697 unregister_netdevice(sdata->dev);
1698 } else {
1699 cfg80211_unregister_wdev(&sdata->wdev);
1700 kfree(sdata);
1701 }
1702}
1703
1704void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1705{
1706 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1707 return;
1708 ieee80211_do_stop(sdata, true);
1709 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1710}
1711
75636525
JB		 1712/*
1713 * Remove all interfaces, may only be called at hardware unregistration
1714 * time because it doesn't do RCU-safe list removals.
1715 */
1716void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1717{
75636525 1718 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1719 LIST_HEAD(unreg_list);
f142c6b9 1720 LIST_HEAD(wdev_list);
f0706e82
JB		 1721
1722 ASSERT_RTNL();
1723
c8aa22db
JB		 1724 /*
1725 * Close all AP_VLAN interfaces first, as otherwise they
1726 * might be closed while the AP interface they belong to
1727 * is closed, causing unregister_netdevice_many() to crash.
1728 */
1729 list_for_each_entry(sdata, &local->interfaces, list)
1730 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1731 dev_close(sdata->dev);
1732
efe117ab 1733 mutex_lock(&local->iflist_mtx);
75636525
JB		 1734 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1735 list_del(&sdata->list);
c771c9d8 1736
f142c6b9
JB		 1737 if (sdata->dev)
1738 unregister_netdevice_queue(sdata->dev, &unreg_list);
1739 else
1740 list_add(&sdata->list, &wdev_list);
f0706e82 1741 }
efe117ab
ED		 1742 mutex_unlock(&local->iflist_mtx);
1743 unregister_netdevice_many(&unreg_list);
5f04d506 1744 list_del(&unreg_list);
f142c6b9
JB		 1745
1746 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1747 list_del(&sdata->list);
1748 cfg80211_unregister_wdev(&sdata->wdev);
1749 kfree(sdata);
1750 }
f0706e82 1751}
5cff20e6 1752
47846c9b 1753static int netdev_notify(struct notifier_block *nb,
351638e7 1754 unsigned long state, void *ptr)
47846c9b 1755{
351638e7 1756 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1757 struct ieee80211_sub_if_data *sdata;
1758
1759 if (state != NETDEV_CHANGENAME)
1760 return 0;
1761
1762 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1763 return 0;
1764
1765 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1766 return 0;
1767
1768 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1769
2f5265e6 1770 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1771
1772 ieee80211_debugfs_rename_netdev(sdata);
1773 return 0;
1774}
1775
1776static struct notifier_block mac80211_netdev_notifier = {
1777 .notifier_call = netdev_notify,
1778};
1779
1780int ieee80211_iface_init(void)
1781{
1782 return register_netdevice_notifier(&mac80211_netdev_notifier);
1783}
1784
1785void ieee80211_iface_exit(void)
1786{
1787 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1788}
Linux 6.x block layer and io_uring tree(s)