?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
btrfs: don't attempt to trim devices that don't support it
[linux/fpc-iii.git] / net / mac80211 / iface.c
blob5836ddeac9e34ecd2aa6e51363679d2cd11f266d
1 /*
2 * Interface handling
3 *
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (c) 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15 #include <linux/slab.h>
16 #include <linux/kernel.h>
17 #include <linux/if_arp.h>
18 #include <linux/netdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <net/ieee80211_radiotap.h>
22 #include "ieee80211_i.h"
23 #include "sta_info.h"
24 #include "debugfs_netdev.h"
25 #include "mesh.h"
26 #include "led.h"
27 #include "driver-ops.h"
28 #include "wme.h"
29 #include "rate.h"
30
31 /**
32 * DOC: Interface list locking
33 *
34 * The interface list in each struct ieee80211_local is protected
35 * three-fold:
36 *
37 * (1) modifications may only be done under the RTNL
38 * (2) modifications and readers are protected against each other by
39 * the iflist_mtx.
40 * (3) modifications are done in an RCU manner so atomic readers
41 * can traverse the list in RCU-safe blocks.
42 *
43 * As a consequence, reads (traversals) of the list can be protected
44 * by either the RTNL, the iflist_mtx or RCU.
45 */
46
47 static void ieee80211_iface_work(struct work_struct *work);
48
49 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50 {
51 struct ieee80211_chanctx_conf *chanctx_conf;
52 int power;
53
54 rcu_read_lock();
55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
56 if (!chanctx_conf) {
57 rcu_read_unlock();
58 return false;
59 }
60
61 power = ieee80211_chandef_max_power(&chanctx_conf->def);
62 rcu_read_unlock();
63
64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->user_power_level);
66
67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
68 power = min(power, sdata->ap_power_level);
69
70 if (power != sdata->vif.bss_conf.txpower) {
71 sdata->vif.bss_conf.txpower = power;
72 ieee80211_hw_config(sdata->local, 0);
73 return true;
74 }
75
76 return false;
77 }
78
79 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 bool update_bss)
81 {
82 if (__ieee80211_recalc_txpower(sdata) ||
83 (update_bss && ieee80211_sdata_running(sdata)))
84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
85 }
86
87 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88 {
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 return 0;
91
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
94 }
95
96 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97 {
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 return 0;
100
101 ieee80211_flush_queues(local, NULL, false);
102
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
105 }
106
107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool force_active)
109 {
110 bool working, scanning, active;
111 unsigned int led_trig_start = 0, led_trig_stop = 0;
112
113 lockdep_assert_held(&local->mtx);
114
115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
117 local->monitors;
118
119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
121
122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124
125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129
130 if (active)
131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 else
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136
137 if (working || scanning || active)
138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
140 }
141
142 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 {
144 return __ieee80211_recalc_idle(local, true);
145 }
146
147 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 {
149 u32 change = __ieee80211_recalc_idle(local, false);
150 if (change)
151 ieee80211_hw_config(local, change);
152 }
153
154 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
155 bool check_dup)
156 {
157 struct ieee80211_local *local = sdata->local;
158 struct ieee80211_sub_if_data *iter;
159 u64 new, mask, tmp;
160 u8 *m;
161 int ret = 0;
162
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
164 return 0;
165
166 m = addr;
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
176 if (!check_dup)
177 return ret;
178
179 mutex_lock(&local->iflist_mtx);
180 list_for_each_entry(iter, &local->interfaces, list) {
181 if (iter == sdata)
182 continue;
183
184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
186 continue;
187
188 m = iter->vif.addr;
189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192
193 if ((new & ~mask) != (tmp & ~mask)) {
194 ret = -EINVAL;
195 break;
196 }
197 }
198 mutex_unlock(&local->iflist_mtx);
199
200 return ret;
201 }
202
203 static int ieee80211_change_mac(struct net_device *dev, void *addr)
204 {
205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
206 struct sockaddr *sa = addr;
207 bool check_dup = true;
208 int ret;
209
210 if (ieee80211_sdata_running(sdata))
211 return -EBUSY;
212
213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
215 check_dup = false;
216
217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
218 if (ret)
219 return ret;
220
221 ret = eth_mac_addr(dev, sa);
222
223 if (ret == 0)
224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
225
226 return ret;
227 }
228
229 static inline int identical_mac_addr_allowed(int type1, int type2)
230 {
231 return type1 == NL80211_IFTYPE_MONITOR ||
232 type2 == NL80211_IFTYPE_MONITOR ||
233 type1 == NL80211_IFTYPE_P2P_DEVICE ||
234 type2 == NL80211_IFTYPE_P2P_DEVICE ||
235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
236 (type1 == NL80211_IFTYPE_WDS &&
237 (type2 == NL80211_IFTYPE_WDS ||
238 type2 == NL80211_IFTYPE_AP)) ||
239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
240 (type1 == NL80211_IFTYPE_AP_VLAN &&
241 (type2 == NL80211_IFTYPE_AP ||
242 type2 == NL80211_IFTYPE_AP_VLAN));
243 }
244
245 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
246 enum nl80211_iftype iftype)
247 {
248 struct ieee80211_local *local = sdata->local;
249 struct ieee80211_sub_if_data *nsdata;
250 int ret;
251
252 ASSERT_RTNL();
253
254 /* we hold the RTNL here so can safely walk the list */
255 list_for_each_entry(nsdata, &local->interfaces, list) {
256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
257 /*
258 * Only OCB and monitor mode may coexist
259 */
260 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
262 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
263 nsdata->vif.type == NL80211_IFTYPE_OCB))
264 return -EBUSY;
265
266 /*
267 * Allow only a single IBSS interface to be up at any
268 * time. This is restricted because beacon distribution
269 * cannot work properly if both are in the same IBSS.
270 *
271 * To remove this restriction we'd have to disallow them
272 * from setting the same SSID on different IBSS interfaces
273 * belonging to the same hardware. Then, however, we're
274 * faced with having to adopt two different TSF timers...
275 */
276 if (iftype == NL80211_IFTYPE_ADHOC &&
277 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 return -EBUSY;
279 /*
280 * will not add another interface while any channel
281 * switch is active.
282 */
283 if (nsdata->vif.csa_active)
284 return -EBUSY;
285
286 /*
287 * The remaining checks are only performed for interfaces
288 * with the same MAC address.
289 */
290 if (!ether_addr_equal(sdata->vif.addr,
291 nsdata->vif.addr))
292 continue;
293
294 /*
295 * check whether it may have the same address
296 */
297 if (!identical_mac_addr_allowed(iftype,
298 nsdata->vif.type))
299 return -ENOTUNIQ;
300
301 /*
302 * can only add VLANs to enabled APs
303 */
304 if (iftype == NL80211_IFTYPE_AP_VLAN &&
305 nsdata->vif.type == NL80211_IFTYPE_AP)
306 sdata->bss = &nsdata->u.ap;
307 }
308 }
309
310 mutex_lock(&local->chanctx_mtx);
311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
312 mutex_unlock(&local->chanctx_mtx);
313 return ret;
314 }
315
316 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
317 enum nl80211_iftype iftype)
318 {
319 int n_queues = sdata->local->hw.queues;
320 int i;
321
322 if (iftype == NL80211_IFTYPE_NAN)
323 return 0;
324
325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
326 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
328 IEEE80211_INVAL_HW_QUEUE))
329 return -EINVAL;
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 n_queues))
332 return -EINVAL;
333 }
334 }
335
336 if ((iftype != NL80211_IFTYPE_AP &&
337 iftype != NL80211_IFTYPE_P2P_GO &&
338 iftype != NL80211_IFTYPE_MESH_POINT) ||
339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
341 return 0;
342 }
343
344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
345 return -EINVAL;
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 return -EINVAL;
349
350 return 0;
351 }
352
353 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
354 const int offset)
355 {
356 struct ieee80211_local *local = sdata->local;
357 u32 flags = sdata->u.mntr.flags;
358
359 #define ADJUST(_f, _s) do { \
360 if (flags & MONITOR_FLAG_##_f) \
361 local->fif_##_s += offset; \
362 } while (0)
363
364 ADJUST(FCSFAIL, fcsfail);
365 ADJUST(PLCPFAIL, plcpfail);
366 ADJUST(CONTROL, control);
367 ADJUST(CONTROL, pspoll);
368 ADJUST(OTHER_BSS, other_bss);
369
370 #undef ADJUST
371 }
372
373 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
374 {
375 struct ieee80211_local *local = sdata->local;
376 int i;
377
378 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
381 else if (local->hw.queues >= IEEE80211_NUM_ACS)
382 sdata->vif.hw_queue[i] = i;
383 else
384 sdata->vif.hw_queue[i] = 0;
385 }
386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
387 }
388
389 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
390 {
391 struct ieee80211_sub_if_data *sdata;
392 int ret;
393
394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
395 return 0;
396
397 ASSERT_RTNL();
398
399 if (local->monitor_sdata)
400 return 0;
401
402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
403 if (!sdata)
404 return -ENOMEM;
405
406 /* set up data */
407 sdata->local = local;
408 sdata->vif.type = NL80211_IFTYPE_MONITOR;
409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
410 wiphy_name(local->hw.wiphy));
411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
412
413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
414
415 ieee80211_set_default_queues(sdata);
416
417 ret = drv_add_interface(local, sdata);
418 if (WARN_ON(ret)) {
419 /* ok .. stupid driver, it asked for this! */
420 kfree(sdata);
421 return ret;
422 }
423
424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
425 if (ret) {
426 kfree(sdata);
427 return ret;
428 }
429
430 mutex_lock(&local->iflist_mtx);
431 rcu_assign_pointer(local->monitor_sdata, sdata);
432 mutex_unlock(&local->iflist_mtx);
433
434 mutex_lock(&local->mtx);
435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
436 IEEE80211_CHANCTX_EXCLUSIVE);
437 mutex_unlock(&local->mtx);
438 if (ret) {
439 mutex_lock(&local->iflist_mtx);
440 RCU_INIT_POINTER(local->monitor_sdata, NULL);
441 mutex_unlock(&local->iflist_mtx);
442 synchronize_net();
443 drv_remove_interface(local, sdata);
444 kfree(sdata);
445 return ret;
446 }
447
448 skb_queue_head_init(&sdata->skb_queue);
449 INIT_WORK(&sdata->work, ieee80211_iface_work);
450
451 return 0;
452 }
453
454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
455 {
456 struct ieee80211_sub_if_data *sdata;
457
458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
459 return;
460
461 ASSERT_RTNL();
462
463 mutex_lock(&local->iflist_mtx);
464
465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
467 if (!sdata) {
468 mutex_unlock(&local->iflist_mtx);
469 return;
470 }
471
472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
473 mutex_unlock(&local->iflist_mtx);
474
475 synchronize_net();
476
477 mutex_lock(&local->mtx);
478 ieee80211_vif_release_channel(sdata);
479 mutex_unlock(&local->mtx);
480
481 drv_remove_interface(local, sdata);
482
483 kfree(sdata);
484 }
485
486 /*
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
490 */
491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
492 {
493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
497 u32 changed = 0;
498 int res;
499 u32 hw_reconf_flags = 0;
500
501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 return -ENOLINK;
505 break;
506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
508
509 if (!sdata->bss)
510 return -ENOLINK;
511
512 mutex_lock(&local->mtx);
513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
514 mutex_unlock(&local->mtx);
515
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
522 sdata->control_port_over_nl80211 =
523 master->control_port_over_nl80211;
524 sdata->vif.cab_queue = master->vif.cab_queue;
525 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
526 sizeof(sdata->vif.hw_queue));
527 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
528
529 mutex_lock(&local->key_mtx);
530 sdata->crypto_tx_tailroom_needed_cnt +=
531 master->crypto_tx_tailroom_needed_cnt;
532 mutex_unlock(&local->key_mtx);
533
534 break;
535 }
536 case NL80211_IFTYPE_AP:
537 sdata->bss = &sdata->u.ap;
538 break;
539 case NL80211_IFTYPE_MESH_POINT:
540 case NL80211_IFTYPE_STATION:
541 case NL80211_IFTYPE_MONITOR:
542 case NL80211_IFTYPE_ADHOC:
543 case NL80211_IFTYPE_P2P_DEVICE:
544 case NL80211_IFTYPE_OCB:
545 case NL80211_IFTYPE_NAN:
546 /* no special treatment */
547 break;
548 case NL80211_IFTYPE_UNSPECIFIED:
549 case NUM_NL80211_IFTYPES:
550 case NL80211_IFTYPE_P2P_CLIENT:
551 case NL80211_IFTYPE_P2P_GO:
552 /* cannot happen */
553 WARN_ON(1);
554 break;
555 }
556
557 if (local->open_count == 0) {
558 res = drv_start(local);
559 if (res)
560 goto err_del_bss;
561 /* we're brought up, everything changes */
562 hw_reconf_flags = ~0;
563 ieee80211_led_radio(local, true);
564 ieee80211_mod_tpt_led_trig(local,
565 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
566 }
567
568 /*
569 * Copy the hopefully now-present MAC address to
570 * this interface, if it has the special null one.
571 */
572 if (dev && is_zero_ether_addr(dev->dev_addr)) {
573 memcpy(dev->dev_addr,
574 local->hw.wiphy->perm_addr,
575 ETH_ALEN);
576 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
577
578 if (!is_valid_ether_addr(dev->dev_addr)) {
579 res = -EADDRNOTAVAIL;
580 goto err_stop;
581 }
582 }
583
584 switch (sdata->vif.type) {
585 case NL80211_IFTYPE_AP_VLAN:
586 /* no need to tell driver, but set carrier and chanctx */
587 if (rtnl_dereference(sdata->bss->beacon)) {
588 ieee80211_vif_vlan_copy_chanctx(sdata);
589 netif_carrier_on(dev);
590 } else {
591 netif_carrier_off(dev);
592 }
593 break;
594 case NL80211_IFTYPE_MONITOR:
595 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
596 local->cooked_mntrs++;
597 break;
598 }
599
600 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
601 res = drv_add_interface(local, sdata);
602 if (res)
603 goto err_stop;
604 } else if (local->monitors == 0 && local->open_count == 0) {
605 res = ieee80211_add_virtual_monitor(local);
606 if (res)
607 goto err_stop;
608 }
609
610 /* must be before the call to ieee80211_configure_filter */
611 local->monitors++;
612 if (local->monitors == 1) {
613 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
614 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
615 }
616
617 ieee80211_adjust_monitor_flags(sdata, 1);
618 ieee80211_configure_filter(local);
619 mutex_lock(&local->mtx);
620 ieee80211_recalc_idle(local);
621 mutex_unlock(&local->mtx);
622
623 netif_carrier_on(dev);
624 break;
625 default:
626 if (coming_up) {
627 ieee80211_del_virtual_monitor(local);
628
629 res = drv_add_interface(local, sdata);
630 if (res)
631 goto err_stop;
632 res = ieee80211_check_queues(sdata,
633 ieee80211_vif_type_p2p(&sdata->vif));
634 if (res)
635 goto err_del_interface;
636 }
637
638 if (sdata->vif.type == NL80211_IFTYPE_AP) {
639 local->fif_pspoll++;
640 local->fif_probe_req++;
641
642 ieee80211_configure_filter(local);
643 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
644 local->fif_probe_req++;
645 }
646
647 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
648 sdata->vif.type != NL80211_IFTYPE_NAN)
649 changed |= ieee80211_reset_erp_info(sdata);
650 ieee80211_bss_info_change_notify(sdata, changed);
651
652 switch (sdata->vif.type) {
653 case NL80211_IFTYPE_STATION:
654 case NL80211_IFTYPE_ADHOC:
655 case NL80211_IFTYPE_AP:
656 case NL80211_IFTYPE_MESH_POINT:
657 case NL80211_IFTYPE_OCB:
658 netif_carrier_off(dev);
659 break;
660 case NL80211_IFTYPE_WDS:
661 case NL80211_IFTYPE_P2P_DEVICE:
662 case NL80211_IFTYPE_NAN:
663 break;
664 default:
665 /* not reached */
666 WARN_ON(1);
667 }
668
669 /*
670 * Set default queue parameters so drivers don't
671 * need to initialise the hardware if the hardware
672 * doesn't start up with sane defaults.
673 * Enable QoS for anything but station interfaces.
674 */
675 ieee80211_set_wmm_default(sdata, true,
676 sdata->vif.type != NL80211_IFTYPE_STATION);
677 }
678
679 set_bit(SDATA_STATE_RUNNING, &sdata->state);
680
681 switch (sdata->vif.type) {
682 case NL80211_IFTYPE_WDS:
683 /* Create STA entry for the WDS peer */
684 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
685 GFP_KERNEL);
686 if (!sta) {
687 res = -ENOMEM;
688 goto err_del_interface;
689 }
690
691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
692 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
693 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
694
695 res = sta_info_insert(sta);
696 if (res) {
697 /* STA has been freed */
698 goto err_del_interface;
699 }
700
701 rate_control_rate_init(sta);
702 netif_carrier_on(dev);
703 break;
704 case NL80211_IFTYPE_P2P_DEVICE:
705 rcu_assign_pointer(local->p2p_sdata, sdata);
706 break;
707 case NL80211_IFTYPE_MONITOR:
708 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
709 break;
710 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
711 break;
712 default:
713 break;
714 }
715
716 /*
717 * set_multicast_list will be invoked by the networking core
718 * which will check whether any increments here were done in
719 * error and sync them down to the hardware as filter flags.
720 */
721 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
722 atomic_inc(&local->iff_allmultis);
723
724 if (coming_up)
725 local->open_count++;
726
727 if (hw_reconf_flags)
728 ieee80211_hw_config(local, hw_reconf_flags);
729
730 ieee80211_recalc_ps(local);
731
732 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
733 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
734 local->ops->wake_tx_queue) {
735 /* XXX: for AP_VLAN, actually track AP queues */
736 if (dev)
737 netif_tx_start_all_queues(dev);
738 } else if (dev) {
739 unsigned long flags;
740 int n_acs = IEEE80211_NUM_ACS;
741 int ac;
742
743 if (local->hw.queues < IEEE80211_NUM_ACS)
744 n_acs = 1;
745
746 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
747 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
748 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
749 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
750 for (ac = 0; ac < n_acs; ac++) {
751 int ac_queue = sdata->vif.hw_queue[ac];
752
753 if (local->queue_stop_reasons[ac_queue] == 0 &&
754 skb_queue_empty(&local->pending[ac_queue]))
755 netif_start_subqueue(dev, ac);
756 }
757 }
758 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
759 }
760
761 return 0;
762 err_del_interface:
763 drv_remove_interface(local, sdata);
764 err_stop:
765 if (!local->open_count)
766 drv_stop(local);
767 err_del_bss:
768 sdata->bss = NULL;
769 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
770 mutex_lock(&local->mtx);
771 list_del(&sdata->u.vlan.list);
772 mutex_unlock(&local->mtx);
773 }
774 /* might already be clear but that doesn't matter */
775 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
776 return res;
777 }
778
779 static int ieee80211_open(struct net_device *dev)
780 {
781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
782 int err;
783
784 /* fail early if user set an invalid address */
785 if (!is_valid_ether_addr(dev->dev_addr))
786 return -EADDRNOTAVAIL;
787
788 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
789 if (err)
790 return err;
791
792 return ieee80211_do_open(&sdata->wdev, true);
793 }
794
795 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
796 bool going_down)
797 {
798 struct ieee80211_local *local = sdata->local;
799 unsigned long flags;
800 struct sk_buff *skb, *tmp;
801 u32 hw_reconf_flags = 0;
802 int i, flushed;
803 struct ps_data *ps;
804 struct cfg80211_chan_def chandef;
805 bool cancel_scan;
806 struct cfg80211_nan_func *func;
807
808 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
809
810 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
811 if (cancel_scan)
812 ieee80211_scan_cancel(local);
813
814 /*
815 * Stop TX on this interface first.
816 */
817 if (sdata->dev)
818 netif_tx_stop_all_queues(sdata->dev);
819
820 ieee80211_roc_purge(local, sdata);
821
822 switch (sdata->vif.type) {
823 case NL80211_IFTYPE_STATION:
824 ieee80211_mgd_stop(sdata);
825 break;
826 case NL80211_IFTYPE_ADHOC:
827 ieee80211_ibss_stop(sdata);
828 break;
829 case NL80211_IFTYPE_AP:
830 cancel_work_sync(&sdata->u.ap.request_smps_work);
831 break;
832 case NL80211_IFTYPE_MONITOR:
833 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
834 break;
835 list_del_rcu(&sdata->u.mntr.list);
836 break;
837 default:
838 break;
839 }
840
841 /*
842 * Remove all stations associated with this interface.
843 *
844 * This must be done before calling ops->remove_interface()
845 * because otherwise we can later invoke ops->sta_notify()
846 * whenever the STAs are removed, and that invalidates driver
847 * assumptions about always getting a vif pointer that is valid
848 * (because if we remove a STA after ops->remove_interface()
849 * the driver will have removed the vif info already!)
850 *
851 * In WDS mode a station must exist here and be flushed, for
852 * AP_VLANs stations may exist since there's nothing else that
853 * would have removed them, but in other modes there shouldn't
854 * be any stations.
855 */
856 flushed = sta_info_flush(sdata);
857 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
858 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
859 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
860
861 /* don't count this interface for allmulti while it is down */
862 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
863 atomic_dec(&local->iff_allmultis);
864
865 if (sdata->vif.type == NL80211_IFTYPE_AP) {
866 local->fif_pspoll--;
867 local->fif_probe_req--;
868 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
869 local->fif_probe_req--;
870 }
871
872 if (sdata->dev) {
873 netif_addr_lock_bh(sdata->dev);
874 spin_lock_bh(&local->filter_lock);
875 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
876 sdata->dev->addr_len);
877 spin_unlock_bh(&local->filter_lock);
878 netif_addr_unlock_bh(sdata->dev);
879 }
880
881 del_timer_sync(&local->dynamic_ps_timer);
882 cancel_work_sync(&local->dynamic_ps_enable_work);
883
884 cancel_work_sync(&sdata->recalc_smps);
885 sdata_lock(sdata);
886 mutex_lock(&local->mtx);
887 sdata->vif.csa_active = false;
888 if (sdata->vif.type == NL80211_IFTYPE_STATION)
889 sdata->u.mgd.csa_waiting_bcn = false;
890 if (sdata->csa_block_tx) {
891 ieee80211_wake_vif_queues(local, sdata,
892 IEEE80211_QUEUE_STOP_REASON_CSA);
893 sdata->csa_block_tx = false;
894 }
895 mutex_unlock(&local->mtx);
896 sdata_unlock(sdata);
897
898 cancel_work_sync(&sdata->csa_finalize_work);
899
900 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
901
902 if (sdata->wdev.cac_started) {
903 chandef = sdata->vif.bss_conf.chandef;
904 WARN_ON(local->suspended);
905 mutex_lock(&local->mtx);
906 ieee80211_vif_release_channel(sdata);
907 mutex_unlock(&local->mtx);
908 cfg80211_cac_event(sdata->dev, &chandef,
909 NL80211_RADAR_CAC_ABORTED,
910 GFP_KERNEL);
911 }
912
913 /* APs need special treatment */
914 if (sdata->vif.type == NL80211_IFTYPE_AP) {
915 struct ieee80211_sub_if_data *vlan, *tmpsdata;
916
917 /* down all dependent devices, that is VLANs */
918 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
919 u.vlan.list)
920 dev_close(vlan->dev);
921 WARN_ON(!list_empty(&sdata->u.ap.vlans));
922 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
923 /* remove all packets in parent bc_buf pointing to this dev */
924 ps = &sdata->bss->ps;
925
926 spin_lock_irqsave(&ps->bc_buf.lock, flags);
927 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
928 if (skb->dev == sdata->dev) {
929 __skb_unlink(skb, &ps->bc_buf);
930 local->total_ps_buffered--;
931 ieee80211_free_txskb(&local->hw, skb);
932 }
933 }
934 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
935 }
936
937 if (going_down)
938 local->open_count--;
939
940 switch (sdata->vif.type) {
941 case NL80211_IFTYPE_AP_VLAN:
942 mutex_lock(&local->mtx);
943 list_del(&sdata->u.vlan.list);
944 mutex_unlock(&local->mtx);
945 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
946 /* see comment in the default case below */
947 ieee80211_free_keys(sdata, true);
948 /* no need to tell driver */
949 break;
950 case NL80211_IFTYPE_MONITOR:
951 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
952 local->cooked_mntrs--;
953 break;
954 }
955
956 local->monitors--;
957 if (local->monitors == 0) {
958 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
959 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
960 }
961
962 ieee80211_adjust_monitor_flags(sdata, -1);
963 break;
964 case NL80211_IFTYPE_NAN:
965 /* clean all the functions */
966 spin_lock_bh(&sdata->u.nan.func_lock);
967
968 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
969 idr_remove(&sdata->u.nan.function_inst_ids, i);
970 cfg80211_free_nan_func(func);
971 }
972 idr_destroy(&sdata->u.nan.function_inst_ids);
973
974 spin_unlock_bh(&sdata->u.nan.func_lock);
975 break;
976 case NL80211_IFTYPE_P2P_DEVICE:
977 /* relies on synchronize_rcu() below */
978 RCU_INIT_POINTER(local->p2p_sdata, NULL);
979 /* fall through */
980 default:
981 cancel_work_sync(&sdata->work);
982 /*
983 * When we get here, the interface is marked down.
984 * Free the remaining keys, if there are any
985 * (which can happen in AP mode if userspace sets
986 * keys before the interface is operating, and maybe
987 * also in WDS mode)
988 *
989 * Force the key freeing to always synchronize_net()
990 * to wait for the RX path in case it is using this
991 * interface enqueuing frames at this very time on
992 * another CPU.
993 */
994 ieee80211_free_keys(sdata, true);
995 skb_queue_purge(&sdata->skb_queue);
996 }
997
998 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
999 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1000 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1001 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1002 if (info->control.vif == &sdata->vif) {
1003 __skb_unlink(skb, &local->pending[i]);
1004 ieee80211_free_txskb(&local->hw, skb);
1005 }
1006 }
1007 }
1008 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1009
1010 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1011 ieee80211_txq_remove_vlan(local, sdata);
1012
1013 sdata->bss = NULL;
1014
1015 if (local->open_count == 0)
1016 ieee80211_clear_tx_pending(local);
1017
1018 /*
1019 * If the interface goes down while suspended, presumably because
1020 * the device was unplugged and that happens before our resume,
1021 * then the driver is already unconfigured and the remainder of
1022 * this function isn't needed.
1023 * XXX: what about WoWLAN? If the device has software state, e.g.
1024 * memory allocated, it might expect teardown commands from
1025 * mac80211 here?
1026 */
1027 if (local->suspended) {
1028 WARN_ON(local->wowlan);
1029 WARN_ON(rtnl_dereference(local->monitor_sdata));
1030 return;
1031 }
1032
1033 switch (sdata->vif.type) {
1034 case NL80211_IFTYPE_AP_VLAN:
1035 break;
1036 case NL80211_IFTYPE_MONITOR:
1037 if (local->monitors == 0)
1038 ieee80211_del_virtual_monitor(local);
1039
1040 mutex_lock(&local->mtx);
1041 ieee80211_recalc_idle(local);
1042 mutex_unlock(&local->mtx);
1043
1044 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1045 break;
1046
1047 /* fall through */
1048 default:
1049 if (going_down)
1050 drv_remove_interface(local, sdata);
1051 }
1052
1053 ieee80211_recalc_ps(local);
1054
1055 if (cancel_scan)
1056 flush_delayed_work(&local->scan_work);
1057
1058 if (local->open_count == 0) {
1059 ieee80211_stop_device(local);
1060
1061 /* no reconfiguring after stop! */
1062 return;
1063 }
1064
1065 /* do after stop to avoid reconfiguring when we stop anyway */
1066 ieee80211_configure_filter(local);
1067 ieee80211_hw_config(local, hw_reconf_flags);
1068
1069 if (local->monitors == local->open_count)
1070 ieee80211_add_virtual_monitor(local);
1071 }
1072
1073 static int ieee80211_stop(struct net_device *dev)
1074 {
1075 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1076
1077 ieee80211_do_stop(sdata, true);
1078
1079 return 0;
1080 }
1081
1082 static void ieee80211_set_multicast_list(struct net_device *dev)
1083 {
1084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1085 struct ieee80211_local *local = sdata->local;
1086 int allmulti, sdata_allmulti;
1087
1088 allmulti = !!(dev->flags & IFF_ALLMULTI);
1089 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1090
1091 if (allmulti != sdata_allmulti) {
1092 if (dev->flags & IFF_ALLMULTI)
1093 atomic_inc(&local->iff_allmultis);
1094 else
1095 atomic_dec(&local->iff_allmultis);
1096 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1097 }
1098
1099 spin_lock_bh(&local->filter_lock);
1100 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1101 spin_unlock_bh(&local->filter_lock);
1102 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1103 }
1104
1105 /*
1106 * Called when the netdev is removed or, by the code below, before
1107 * the interface type changes.
1108 */
1109 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1110 {
1111 int i;
1112
1113 /* free extra data */
1114 ieee80211_free_keys(sdata, false);
1115
1116 ieee80211_debugfs_remove_netdev(sdata);
1117
1118 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1119 __skb_queue_purge(&sdata->fragments[i].skb_list);
1120 sdata->fragment_next = 0;
1121
1122 if (ieee80211_vif_is_mesh(&sdata->vif))
1123 ieee80211_mesh_teardown_sdata(sdata);
1124 }
1125
1126 static void ieee80211_uninit(struct net_device *dev)
1127 {
1128 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1129 }
1130
1131 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1132 struct sk_buff *skb,
1133 struct net_device *sb_dev,
1134 select_queue_fallback_t fallback)
1135 {
1136 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1137 }
1138
1139 static void
1140 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1141 {
1142 int i;
1143
1144 for_each_possible_cpu(i) {
1145 const struct pcpu_sw_netstats *tstats;
1146 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1147 unsigned int start;
1148
1149 tstats = per_cpu_ptr(dev->tstats, i);
1150
1151 do {
1152 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1153 rx_packets = tstats->rx_packets;
1154 tx_packets = tstats->tx_packets;
1155 rx_bytes = tstats->rx_bytes;
1156 tx_bytes = tstats->tx_bytes;
1157 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1158
1159 stats->rx_packets += rx_packets;
1160 stats->tx_packets += tx_packets;
1161 stats->rx_bytes += rx_bytes;
1162 stats->tx_bytes += tx_bytes;
1163 }
1164 }
1165
1166 static const struct net_device_ops ieee80211_dataif_ops = {
1167 .ndo_open = ieee80211_open,
1168 .ndo_stop = ieee80211_stop,
1169 .ndo_uninit = ieee80211_uninit,
1170 .ndo_start_xmit = ieee80211_subif_start_xmit,
1171 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1172 .ndo_set_mac_address = ieee80211_change_mac,
1173 .ndo_select_queue = ieee80211_netdev_select_queue,
1174 .ndo_get_stats64 = ieee80211_get_stats64,
1175 };
1176
1177 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1178 struct sk_buff *skb,
1179 struct net_device *sb_dev,
1180 select_queue_fallback_t fallback)
1181 {
1182 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1183 struct ieee80211_local *local = sdata->local;
1184 struct ieee80211_hdr *hdr;
1185 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1186
1187 if (local->hw.queues < IEEE80211_NUM_ACS)
1188 return 0;
1189
1190 if (skb->len < 4 ||
1191 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1192 return 0; /* doesn't matter, frame will be dropped */
1193
1194 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1195
1196 return ieee80211_select_queue_80211(sdata, skb, hdr);
1197 }
1198
1199 static const struct net_device_ops ieee80211_monitorif_ops = {
1200 .ndo_open = ieee80211_open,
1201 .ndo_stop = ieee80211_stop,
1202 .ndo_uninit = ieee80211_uninit,
1203 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1204 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1205 .ndo_set_mac_address = ieee80211_change_mac,
1206 .ndo_select_queue = ieee80211_monitor_select_queue,
1207 .ndo_get_stats64 = ieee80211_get_stats64,
1208 };
1209
1210 static void ieee80211_if_free(struct net_device *dev)
1211 {
1212 free_percpu(dev->tstats);
1213 }
1214
1215 static void ieee80211_if_setup(struct net_device *dev)
1216 {
1217 ether_setup(dev);
1218 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1219 dev->netdev_ops = &ieee80211_dataif_ops;
1220 dev->needs_free_netdev = true;
1221 dev->priv_destructor = ieee80211_if_free;
1222 }
1223
1224 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1225 {
1226 ieee80211_if_setup(dev);
1227 dev->priv_flags |= IFF_NO_QUEUE;
1228 }
1229
1230 static void ieee80211_iface_work(struct work_struct *work)
1231 {
1232 struct ieee80211_sub_if_data *sdata =
1233 container_of(work, struct ieee80211_sub_if_data, work);
1234 struct ieee80211_local *local = sdata->local;
1235 struct sk_buff *skb;
1236 struct sta_info *sta;
1237
1238 if (!ieee80211_sdata_running(sdata))
1239 return;
1240
1241 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1242 return;
1243
1244 if (!ieee80211_can_run_worker(local))
1245 return;
1246
1247 /* first process frames */
1248 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1249 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1250
1251 if (ieee80211_is_action(mgmt->frame_control) &&
1252 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1253 int len = skb->len;
1254
1255 mutex_lock(&local->sta_mtx);
1256 sta = sta_info_get_bss(sdata, mgmt->sa);
1257 if (sta) {
1258 switch (mgmt->u.action.u.addba_req.action_code) {
1259 case WLAN_ACTION_ADDBA_REQ:
1260 ieee80211_process_addba_request(
1261 local, sta, mgmt, len);
1262 break;
1263 case WLAN_ACTION_ADDBA_RESP:
1264 ieee80211_process_addba_resp(local, sta,
1265 mgmt, len);
1266 break;
1267 case WLAN_ACTION_DELBA:
1268 ieee80211_process_delba(sdata, sta,
1269 mgmt, len);
1270 break;
1271 default:
1272 WARN_ON(1);
1273 break;
1274 }
1275 }
1276 mutex_unlock(&local->sta_mtx);
1277 } else if (ieee80211_is_action(mgmt->frame_control) &&
1278 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1279 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1280 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1281 struct ieee80211_rx_status *status;
1282 enum nl80211_band band;
1283 u8 opmode;
1284
1285 status = IEEE80211_SKB_RXCB(skb);
1286 band = status->band;
1287 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1288
1289 mutex_lock(&local->sta_mtx);
1290 sta = sta_info_get_bss(sdata, mgmt->sa);
1291
1292 if (sta)
1293 ieee80211_vht_handle_opmode(sdata, sta,
1294 opmode,
1295 band);
1296
1297 mutex_unlock(&local->sta_mtx);
1298 break;
1299 }
1300 case WLAN_VHT_ACTION_GROUPID_MGMT:
1301 ieee80211_process_mu_groups(sdata, mgmt);
1302 break;
1303 default:
1304 WARN_ON(1);
1305 break;
1306 }
1307 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1308 struct ieee80211_hdr *hdr = (void *)mgmt;
1309 /*
1310 * So the frame isn't mgmt, but frame_control
1311 * is at the right place anyway, of course, so
1312 * the if statement is correct.
1313 *
1314 * Warn if we have other data frame types here,
1315 * they must not get here.
1316 */
1317 WARN_ON(hdr->frame_control &
1318 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1319 WARN_ON(!(hdr->seq_ctrl &
1320 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1321 /*
1322 * This was a fragment of a frame, received while
1323 * a block-ack session was active. That cannot be
1324 * right, so terminate the session.
1325 */
1326 mutex_lock(&local->sta_mtx);
1327 sta = sta_info_get_bss(sdata, mgmt->sa);
1328 if (sta) {
1329 u16 tid = ieee80211_get_tid(hdr);
1330
1331 __ieee80211_stop_rx_ba_session(
1332 sta, tid, WLAN_BACK_RECIPIENT,
1333 WLAN_REASON_QSTA_REQUIRE_SETUP,
1334 true);
1335 }
1336 mutex_unlock(&local->sta_mtx);
1337 } else switch (sdata->vif.type) {
1338 case NL80211_IFTYPE_STATION:
1339 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1340 break;
1341 case NL80211_IFTYPE_ADHOC:
1342 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1343 break;
1344 case NL80211_IFTYPE_MESH_POINT:
1345 if (!ieee80211_vif_is_mesh(&sdata->vif))
1346 break;
1347 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1348 break;
1349 default:
1350 WARN(1, "frame for unexpected interface type");
1351 break;
1352 }
1353
1354 kfree_skb(skb);
1355 }
1356
1357 /* then other type-dependent work */
1358 switch (sdata->vif.type) {
1359 case NL80211_IFTYPE_STATION:
1360 ieee80211_sta_work(sdata);
1361 break;
1362 case NL80211_IFTYPE_ADHOC:
1363 ieee80211_ibss_work(sdata);
1364 break;
1365 case NL80211_IFTYPE_MESH_POINT:
1366 if (!ieee80211_vif_is_mesh(&sdata->vif))
1367 break;
1368 ieee80211_mesh_work(sdata);
1369 break;
1370 case NL80211_IFTYPE_OCB:
1371 ieee80211_ocb_work(sdata);
1372 break;
1373 default:
1374 break;
1375 }
1376 }
1377
1378 static void ieee80211_recalc_smps_work(struct work_struct *work)
1379 {
1380 struct ieee80211_sub_if_data *sdata =
1381 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1382
1383 ieee80211_recalc_smps(sdata);
1384 }
1385
1386 /*
1387 * Helper function to initialise an interface to a specific type.
1388 */
1389 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1390 enum nl80211_iftype type)
1391 {
1392 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1393 0xff, 0xff, 0xff};
1394
1395 /* clear type-dependent union */
1396 memset(&sdata->u, 0, sizeof(sdata->u));
1397
1398 /* and set some type-dependent values */
1399 sdata->vif.type = type;
1400 sdata->vif.p2p = false;
1401 sdata->wdev.iftype = type;
1402
1403 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1404 sdata->control_port_no_encrypt = false;
1405 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1406 sdata->vif.bss_conf.idle = true;
1407
1408 sdata->noack_map = 0;
1409
1410 /* only monitor/p2p-device differ */
1411 if (sdata->dev) {
1412 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1413 sdata->dev->type = ARPHRD_ETHER;
1414 }
1415
1416 skb_queue_head_init(&sdata->skb_queue);
1417 INIT_WORK(&sdata->work, ieee80211_iface_work);
1418 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1419 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1420 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1421 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1422
1423 switch (type) {
1424 case NL80211_IFTYPE_P2P_GO:
1425 type = NL80211_IFTYPE_AP;
1426 sdata->vif.type = type;
1427 sdata->vif.p2p = true;
1428 /* fall through */
1429 case NL80211_IFTYPE_AP:
1430 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1431 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1432 INIT_WORK(&sdata->u.ap.request_smps_work,
1433 ieee80211_request_smps_ap_work);
1434 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1435 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1436 break;
1437 case NL80211_IFTYPE_P2P_CLIENT:
1438 type = NL80211_IFTYPE_STATION;
1439 sdata->vif.type = type;
1440 sdata->vif.p2p = true;
1441 /* fall through */
1442 case NL80211_IFTYPE_STATION:
1443 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1444 ieee80211_sta_setup_sdata(sdata);
1445 break;
1446 case NL80211_IFTYPE_OCB:
1447 sdata->vif.bss_conf.bssid = bssid_wildcard;
1448 ieee80211_ocb_setup_sdata(sdata);
1449 break;
1450 case NL80211_IFTYPE_ADHOC:
1451 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1452 ieee80211_ibss_setup_sdata(sdata);
1453 break;
1454 case NL80211_IFTYPE_MESH_POINT:
1455 if (ieee80211_vif_is_mesh(&sdata->vif))
1456 ieee80211_mesh_init_sdata(sdata);
1457 break;
1458 case NL80211_IFTYPE_MONITOR:
1459 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1460 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1461 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1462 MONITOR_FLAG_OTHER_BSS;
1463 break;
1464 case NL80211_IFTYPE_WDS:
1465 sdata->vif.bss_conf.bssid = NULL;
1466 break;
1467 case NL80211_IFTYPE_NAN:
1468 idr_init(&sdata->u.nan.function_inst_ids);
1469 spin_lock_init(&sdata->u.nan.func_lock);
1470 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1471 break;
1472 case NL80211_IFTYPE_AP_VLAN:
1473 case NL80211_IFTYPE_P2P_DEVICE:
1474 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1475 break;
1476 case NL80211_IFTYPE_UNSPECIFIED:
1477 case NUM_NL80211_IFTYPES:
1478 WARN_ON(1);
1479 break;
1480 }
1481
1482 ieee80211_debugfs_add_netdev(sdata);
1483 }
1484
1485 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1486 enum nl80211_iftype type)
1487 {
1488 struct ieee80211_local *local = sdata->local;
1489 int ret, err;
1490 enum nl80211_iftype internal_type = type;
1491 bool p2p = false;
1492
1493 ASSERT_RTNL();
1494
1495 if (!local->ops->change_interface)
1496 return -EBUSY;
1497
1498 switch (sdata->vif.type) {
1499 case NL80211_IFTYPE_AP:
1500 case NL80211_IFTYPE_STATION:
1501 case NL80211_IFTYPE_ADHOC:
1502 case NL80211_IFTYPE_OCB:
1503 /*
1504 * Could maybe also all others here?
1505 * Just not sure how that interacts
1506 * with the RX/config path e.g. for
1507 * mesh.
1508 */
1509 break;
1510 default:
1511 return -EBUSY;
1512 }
1513
1514 switch (type) {
1515 case NL80211_IFTYPE_AP:
1516 case NL80211_IFTYPE_STATION:
1517 case NL80211_IFTYPE_ADHOC:
1518 case NL80211_IFTYPE_OCB:
1519 /*
1520 * Could probably support everything
1521 * but WDS here (WDS do_open can fail
1522 * under memory pressure, which this
1523 * code isn't prepared to handle).
1524 */
1525 break;
1526 case NL80211_IFTYPE_P2P_CLIENT:
1527 p2p = true;
1528 internal_type = NL80211_IFTYPE_STATION;
1529 break;
1530 case NL80211_IFTYPE_P2P_GO:
1531 p2p = true;
1532 internal_type = NL80211_IFTYPE_AP;
1533 break;
1534 default:
1535 return -EBUSY;
1536 }
1537
1538 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1539 if (ret)
1540 return ret;
1541
1542 ieee80211_do_stop(sdata, false);
1543
1544 ieee80211_teardown_sdata(sdata);
1545
1546 ret = drv_change_interface(local, sdata, internal_type, p2p);
1547 if (ret)
1548 type = ieee80211_vif_type_p2p(&sdata->vif);
1549
1550 /*
1551 * Ignore return value here, there's not much we can do since
1552 * the driver changed the interface type internally already.
1553 * The warnings will hopefully make driver authors fix it :-)
1554 */
1555 ieee80211_check_queues(sdata, type);
1556
1557 ieee80211_setup_sdata(sdata, type);
1558
1559 err = ieee80211_do_open(&sdata->wdev, false);
1560 WARN(err, "type change: do_open returned %d", err);
1561
1562 return ret;
1563 }
1564
1565 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1566 enum nl80211_iftype type)
1567 {
1568 int ret;
1569
1570 ASSERT_RTNL();
1571
1572 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1573 return 0;
1574
1575 if (ieee80211_sdata_running(sdata)) {
1576 ret = ieee80211_runtime_change_iftype(sdata, type);
1577 if (ret)
1578 return ret;
1579 } else {
1580 /* Purge and reset type-dependent state. */
1581 ieee80211_teardown_sdata(sdata);
1582 ieee80211_setup_sdata(sdata, type);
1583 }
1584
1585 /* reset some values that shouldn't be kept across type changes */
1586 if (type == NL80211_IFTYPE_STATION)
1587 sdata->u.mgd.use_4addr = false;
1588
1589 return 0;
1590 }
1591
1592 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1593 u8 *perm_addr, enum nl80211_iftype type)
1594 {
1595 struct ieee80211_sub_if_data *sdata;
1596 u64 mask, start, addr, val, inc;
1597 u8 *m;
1598 u8 tmp_addr[ETH_ALEN];
1599 int i;
1600
1601 /* default ... something at least */
1602 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1603
1604 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1605 local->hw.wiphy->n_addresses <= 1)
1606 return;
1607
1608 mutex_lock(&local->iflist_mtx);
1609
1610 switch (type) {
1611 case NL80211_IFTYPE_MONITOR:
1612 /* doesn't matter */
1613 break;
1614 case NL80211_IFTYPE_WDS:
1615 case NL80211_IFTYPE_AP_VLAN:
1616 /* match up with an AP interface */
1617 list_for_each_entry(sdata, &local->interfaces, list) {
1618 if (sdata->vif.type != NL80211_IFTYPE_AP)
1619 continue;
1620 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1621 break;
1622 }
1623 /* keep default if no AP interface present */
1624 break;
1625 case NL80211_IFTYPE_P2P_CLIENT:
1626 case NL80211_IFTYPE_P2P_GO:
1627 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1628 list_for_each_entry(sdata, &local->interfaces, list) {
1629 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1630 continue;
1631 if (!ieee80211_sdata_running(sdata))
1632 continue;
1633 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1634 goto out_unlock;
1635 }
1636 }
1637 /* fall through */
1638 default:
1639 /* assign a new address if possible -- try n_addresses first */
1640 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1641 bool used = false;
1642
1643 list_for_each_entry(sdata, &local->interfaces, list) {
1644 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1645 sdata->vif.addr)) {
1646 used = true;
1647 break;
1648 }
1649 }
1650
1651 if (!used) {
1652 memcpy(perm_addr,
1653 local->hw.wiphy->addresses[i].addr,
1654 ETH_ALEN);
1655 break;
1656 }
1657 }
1658
1659 /* try mask if available */
1660 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1661 break;
1662
1663 m = local->hw.wiphy->addr_mask;
1664 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1665 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1666 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1667
1668 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1669 /* not a contiguous mask ... not handled now! */
1670 pr_info("not contiguous\n");
1671 break;
1672 }
1673
1674 /*
1675 * Pick address of existing interface in case user changed
1676 * MAC address manually, default to perm_addr.
1677 */
1678 m = local->hw.wiphy->perm_addr;
1679 list_for_each_entry(sdata, &local->interfaces, list) {
1680 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1681 continue;
1682 m = sdata->vif.addr;
1683 break;
1684 }
1685 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1686 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1687 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1688
1689 inc = 1ULL<<__ffs64(mask);
1690 val = (start & mask);
1691 addr = (start & ~mask) | (val & mask);
1692 do {
1693 bool used = false;
1694
1695 tmp_addr[5] = addr >> 0*8;
1696 tmp_addr[4] = addr >> 1*8;
1697 tmp_addr[3] = addr >> 2*8;
1698 tmp_addr[2] = addr >> 3*8;
1699 tmp_addr[1] = addr >> 4*8;
1700 tmp_addr[0] = addr >> 5*8;
1701
1702 val += inc;
1703
1704 list_for_each_entry(sdata, &local->interfaces, list) {
1705 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1706 used = true;
1707 break;
1708 }
1709 }
1710
1711 if (!used) {
1712 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1713 break;
1714 }
1715 addr = (start & ~mask) | (val & mask);
1716 } while (addr != start);
1717
1718 break;
1719 }
1720
1721 out_unlock:
1722 mutex_unlock(&local->iflist_mtx);
1723 }
1724
1725 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1726 unsigned char name_assign_type,
1727 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1728 struct vif_params *params)
1729 {
1730 struct net_device *ndev = NULL;
1731 struct ieee80211_sub_if_data *sdata = NULL;
1732 struct txq_info *txqi;
1733 void (*if_setup)(struct net_device *dev);
1734 int ret, i;
1735 int txqs = 1;
1736
1737 ASSERT_RTNL();
1738
1739 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1740 struct wireless_dev *wdev;
1741
1742 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1743 GFP_KERNEL);
1744 if (!sdata)
1745 return -ENOMEM;
1746 wdev = &sdata->wdev;
1747
1748 sdata->dev = NULL;
1749 strlcpy(sdata->name, name, IFNAMSIZ);
1750 ieee80211_assign_perm_addr(local, wdev->address, type);
1751 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1752 } else {
1753 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1754 sizeof(void *));
1755 int txq_size = 0;
1756
1757 if (local->ops->wake_tx_queue &&
1758 type != NL80211_IFTYPE_AP_VLAN &&
1759 (type != NL80211_IFTYPE_MONITOR ||
1760 (params->flags & MONITOR_FLAG_ACTIVE)))
1761 txq_size += sizeof(struct txq_info) +
1762 local->hw.txq_data_size;
1763
1764 if (local->ops->wake_tx_queue)
1765 if_setup = ieee80211_if_setup_no_queue;
1766 else
1767 if_setup = ieee80211_if_setup;
1768
1769 if (local->hw.queues >= IEEE80211_NUM_ACS)
1770 txqs = IEEE80211_NUM_ACS;
1771
1772 ndev = alloc_netdev_mqs(size + txq_size,
1773 name, name_assign_type,
1774 if_setup, txqs, 1);
1775 if (!ndev)
1776 return -ENOMEM;
1777 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1778
1779 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1780 if (!ndev->tstats) {
1781 free_netdev(ndev);
1782 return -ENOMEM;
1783 }
1784
1785 ndev->needed_headroom = local->tx_headroom +
1786 4*6 /* four MAC addresses */
1787 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1788 + 6 /* mesh */
1789 + 8 /* rfc1042/bridge tunnel */
1790 - ETH_HLEN /* ethernet hard_header_len */
1791 + IEEE80211_ENCRYPT_HEADROOM;
1792 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1793
1794 ret = dev_alloc_name(ndev, ndev->name);
1795 if (ret < 0) {
1796 ieee80211_if_free(ndev);
1797 free_netdev(ndev);
1798 return ret;
1799 }
1800
1801 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1802 if (params && is_valid_ether_addr(params->macaddr))
1803 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1804 else
1805 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1806 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1807
1808 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1809 sdata = netdev_priv(ndev);
1810 ndev->ieee80211_ptr = &sdata->wdev;
1811 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1812 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1813
1814 if (txq_size) {
1815 txqi = netdev_priv(ndev) + size;
1816 ieee80211_txq_init(sdata, NULL, txqi, 0);
1817 }
1818
1819 sdata->dev = ndev;
1820 }
1821
1822 /* initialise type-independent data */
1823 sdata->wdev.wiphy = local->hw.wiphy;
1824 sdata->local = local;
1825
1826 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1827 skb_queue_head_init(&sdata->fragments[i].skb_list);
1828
1829 INIT_LIST_HEAD(&sdata->key_list);
1830
1831 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1832 ieee80211_dfs_cac_timer_work);
1833 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1834 ieee80211_delayed_tailroom_dec);
1835
1836 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1837 struct ieee80211_supported_band *sband;
1838 sband = local->hw.wiphy->bands[i];
1839 sdata->rc_rateidx_mask[i] =
1840 sband ? (1 << sband->n_bitrates) - 1 : 0;
1841 if (sband) {
1842 __le16 cap;
1843 u16 *vht_rate_mask;
1844
1845 memcpy(sdata->rc_rateidx_mcs_mask[i],
1846 sband->ht_cap.mcs.rx_mask,
1847 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1848
1849 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1850 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1851 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1852 } else {
1853 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1854 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1855 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1856 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1857 }
1858 }
1859
1860 ieee80211_set_default_queues(sdata);
1861
1862 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1863 sdata->user_power_level = local->user_power_level;
1864
1865 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1866
1867 /* setup type-dependent data */
1868 ieee80211_setup_sdata(sdata, type);
1869
1870 if (ndev) {
1871 if (params) {
1872 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1873 if (type == NL80211_IFTYPE_STATION)
1874 sdata->u.mgd.use_4addr = params->use_4addr;
1875 }
1876
1877 ndev->features |= local->hw.netdev_features;
1878
1879 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1880
1881 /* MTU range: 256 - 2304 */
1882 ndev->min_mtu = 256;
1883 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1884
1885 ret = register_netdevice(ndev);
1886 if (ret) {
1887 free_netdev(ndev);
1888 return ret;
1889 }
1890 }
1891
1892 mutex_lock(&local->iflist_mtx);
1893 list_add_tail_rcu(&sdata->list, &local->interfaces);
1894 mutex_unlock(&local->iflist_mtx);
1895
1896 if (new_wdev)
1897 *new_wdev = &sdata->wdev;
1898
1899 return 0;
1900 }
1901
1902 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1903 {
1904 ASSERT_RTNL();
1905
1906 mutex_lock(&sdata->local->iflist_mtx);
1907 list_del_rcu(&sdata->list);
1908 mutex_unlock(&sdata->local->iflist_mtx);
1909
1910 synchronize_rcu();
1911
1912 if (sdata->dev) {
1913 unregister_netdevice(sdata->dev);
1914 } else {
1915 cfg80211_unregister_wdev(&sdata->wdev);
1916 ieee80211_teardown_sdata(sdata);
1917 kfree(sdata);
1918 }
1919 }
1920
1921 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1922 {
1923 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1924 return;
1925 ieee80211_do_stop(sdata, true);
1926 }
1927
1928 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1929 {
1930 struct ieee80211_sub_if_data *sdata, *tmp;
1931 LIST_HEAD(unreg_list);
1932 LIST_HEAD(wdev_list);
1933
1934 ASSERT_RTNL();
1935
1936 /* Before destroying the interfaces, make sure they're all stopped so
1937 * that the hardware is stopped. Otherwise, the driver might still be
1938 * iterating the interfaces during the shutdown, e.g. from a worker
1939 * or from RX processing or similar, and if it does so (using atomic
1940 * iteration) while we're manipulating the list, the iteration will
1941 * crash.
1942 *
1943 * After this, the hardware should be stopped and the driver should
1944 * have stopped all of its activities, so that we can do RCU-unaware
1945 * manipulations of the interface list below.
1946 */
1947 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1948
1949 WARN(local->open_count, "%s: open count remains %d\n",
1950 wiphy_name(local->hw.wiphy), local->open_count);
1951
1952 mutex_lock(&local->iflist_mtx);
1953 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1954 list_del(&sdata->list);
1955
1956 if (sdata->dev)
1957 unregister_netdevice_queue(sdata->dev, &unreg_list);
1958 else
1959 list_add(&sdata->list, &wdev_list);
1960 }
1961 mutex_unlock(&local->iflist_mtx);
1962 unregister_netdevice_many(&unreg_list);
1963
1964 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1965 list_del(&sdata->list);
1966 cfg80211_unregister_wdev(&sdata->wdev);
1967 kfree(sdata);
1968 }
1969 }
1970
1971 static int netdev_notify(struct notifier_block *nb,
1972 unsigned long state, void *ptr)
1973 {
1974 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1975 struct ieee80211_sub_if_data *sdata;
1976
1977 if (state != NETDEV_CHANGENAME)
1978 return NOTIFY_DONE;
1979
1980 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1981 return NOTIFY_DONE;
1982
1983 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1984 return NOTIFY_DONE;
1985
1986 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1987 memcpy(sdata->name, dev->name, IFNAMSIZ);
1988 ieee80211_debugfs_rename_netdev(sdata);
1989
1990 return NOTIFY_OK;
1991 }
1992
1993 static struct notifier_block mac80211_netdev_notifier = {
1994 .notifier_call = netdev_notify,
1995 };
1996
1997 int ieee80211_iface_init(void)
1998 {
1999 return register_netdevice_notifier(&mac80211_netdev_notifier);
2000 }
2001
2002 void ieee80211_iface_exit(void)
2003 {
2004 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2005 }
2006
2007 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2008 {
2009 if (sdata->vif.type == NL80211_IFTYPE_AP)
2010 atomic_inc(&sdata->u.ap.num_mcast_sta);
2011 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2012 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2013 }
2014
2015 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2016 {
2017 if (sdata->vif.type == NL80211_IFTYPE_AP)
2018 atomic_dec(&sdata->u.ap.num_mcast_sta);
2019 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2020 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2021 }
Linux with added FPC-III support