]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - net/mac80211/iface.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
UBUNTU: Ubuntu-raspi2-4.13.0-1014.15
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / iface.c
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->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
526
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
531
532 break;
533 }
534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
536 break;
537 case NL80211_IFTYPE_MESH_POINT:
538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
541 case NL80211_IFTYPE_P2P_DEVICE:
542 case NL80211_IFTYPE_OCB:
543 case NL80211_IFTYPE_NAN:
544 /* no special treatment */
545 break;
546 case NL80211_IFTYPE_UNSPECIFIED:
547 case NUM_NL80211_IFTYPES:
548 case NL80211_IFTYPE_P2P_CLIENT:
549 case NL80211_IFTYPE_P2P_GO:
550 /* cannot happen */
551 WARN_ON(1);
552 break;
553 }
554
555 if (local->open_count == 0) {
556 res = drv_start(local);
557 if (res)
558 goto err_del_bss;
559 /* we're brought up, everything changes */
560 hw_reconf_flags = ~0;
561 ieee80211_led_radio(local, true);
562 ieee80211_mod_tpt_led_trig(local,
563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
564 }
565
566 /*
567 * Copy the hopefully now-present MAC address to
568 * this interface, if it has the special null one.
569 */
570 if (dev && is_zero_ether_addr(dev->dev_addr)) {
571 memcpy(dev->dev_addr,
572 local->hw.wiphy->perm_addr,
573 ETH_ALEN);
574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
575
576 if (!is_valid_ether_addr(dev->dev_addr)) {
577 res = -EADDRNOTAVAIL;
578 goto err_stop;
579 }
580 }
581
582 switch (sdata->vif.type) {
583 case NL80211_IFTYPE_AP_VLAN:
584 /* no need to tell driver, but set carrier and chanctx */
585 if (rtnl_dereference(sdata->bss->beacon)) {
586 ieee80211_vif_vlan_copy_chanctx(sdata);
587 netif_carrier_on(dev);
588 } else {
589 netif_carrier_off(dev);
590 }
591 break;
592 case NL80211_IFTYPE_MONITOR:
593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
594 local->cooked_mntrs++;
595 break;
596 }
597
598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
599 res = drv_add_interface(local, sdata);
600 if (res)
601 goto err_stop;
602 } else if (local->monitors == 0 && local->open_count == 0) {
603 res = ieee80211_add_virtual_monitor(local);
604 if (res)
605 goto err_stop;
606 }
607
608 /* must be before the call to ieee80211_configure_filter */
609 local->monitors++;
610 if (local->monitors == 1) {
611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
613 }
614
615 ieee80211_adjust_monitor_flags(sdata, 1);
616 ieee80211_configure_filter(local);
617 mutex_lock(&local->mtx);
618 ieee80211_recalc_idle(local);
619 mutex_unlock(&local->mtx);
620
621 netif_carrier_on(dev);
622 break;
623 default:
624 if (coming_up) {
625 ieee80211_del_virtual_monitor(local);
626
627 res = drv_add_interface(local, sdata);
628 if (res)
629 goto err_stop;
630 res = ieee80211_check_queues(sdata,
631 ieee80211_vif_type_p2p(&sdata->vif));
632 if (res)
633 goto err_del_interface;
634 }
635
636 if (sdata->vif.type == NL80211_IFTYPE_AP) {
637 local->fif_pspoll++;
638 local->fif_probe_req++;
639
640 ieee80211_configure_filter(local);
641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
642 local->fif_probe_req++;
643 }
644
645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
646 sdata->vif.type != NL80211_IFTYPE_NAN)
647 changed |= ieee80211_reset_erp_info(sdata);
648 ieee80211_bss_info_change_notify(sdata, changed);
649
650 switch (sdata->vif.type) {
651 case NL80211_IFTYPE_STATION:
652 case NL80211_IFTYPE_ADHOC:
653 case NL80211_IFTYPE_AP:
654 case NL80211_IFTYPE_MESH_POINT:
655 case NL80211_IFTYPE_OCB:
656 netif_carrier_off(dev);
657 break;
658 case NL80211_IFTYPE_WDS:
659 case NL80211_IFTYPE_P2P_DEVICE:
660 case NL80211_IFTYPE_NAN:
661 break;
662 default:
663 /* not reached */
664 WARN_ON(1);
665 }
666
667 /*
668 * Set default queue parameters so drivers don't
669 * need to initialise the hardware if the hardware
670 * doesn't start up with sane defaults.
671 * Enable QoS for anything but station interfaces.
672 */
673 ieee80211_set_wmm_default(sdata, true,
674 sdata->vif.type != NL80211_IFTYPE_STATION);
675 }
676
677 set_bit(SDATA_STATE_RUNNING, &sdata->state);
678
679 switch (sdata->vif.type) {
680 case NL80211_IFTYPE_WDS:
681 /* Create STA entry for the WDS peer */
682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
683 GFP_KERNEL);
684 if (!sta) {
685 res = -ENOMEM;
686 goto err_del_interface;
687 }
688
689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
692
693 res = sta_info_insert(sta);
694 if (res) {
695 /* STA has been freed */
696 goto err_del_interface;
697 }
698
699 rate_control_rate_init(sta);
700 netif_carrier_on(dev);
701 break;
702 case NL80211_IFTYPE_P2P_DEVICE:
703 rcu_assign_pointer(local->p2p_sdata, sdata);
704 break;
705 case NL80211_IFTYPE_MONITOR:
706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
707 break;
708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
709 break;
710 default:
711 break;
712 }
713
714 /*
715 * set_multicast_list will be invoked by the networking core
716 * which will check whether any increments here were done in
717 * error and sync them down to the hardware as filter flags.
718 */
719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
720 atomic_inc(&local->iff_allmultis);
721
722 if (coming_up)
723 local->open_count++;
724
725 if (hw_reconf_flags)
726 ieee80211_hw_config(local, hw_reconf_flags);
727
728 ieee80211_recalc_ps(local);
729
730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
732 local->ops->wake_tx_queue) {
733 /* XXX: for AP_VLAN, actually track AP queues */
734 netif_tx_start_all_queues(dev);
735 } else if (dev) {
736 unsigned long flags;
737 int n_acs = IEEE80211_NUM_ACS;
738 int ac;
739
740 if (local->hw.queues < IEEE80211_NUM_ACS)
741 n_acs = 1;
742
743 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
744 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
745 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
746 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
747 for (ac = 0; ac < n_acs; ac++) {
748 int ac_queue = sdata->vif.hw_queue[ac];
749
750 if (local->queue_stop_reasons[ac_queue] == 0 &&
751 skb_queue_empty(&local->pending[ac_queue]))
752 netif_start_subqueue(dev, ac);
753 }
754 }
755 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
756 }
757
758 return 0;
759 err_del_interface:
760 drv_remove_interface(local, sdata);
761 err_stop:
762 if (!local->open_count)
763 drv_stop(local);
764 err_del_bss:
765 sdata->bss = NULL;
766 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
767 mutex_lock(&local->mtx);
768 list_del(&sdata->u.vlan.list);
769 mutex_unlock(&local->mtx);
770 }
771 /* might already be clear but that doesn't matter */
772 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
773 return res;
774 }
775
776 static int ieee80211_open(struct net_device *dev)
777 {
778 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
779 int err;
780
781 /* fail early if user set an invalid address */
782 if (!is_valid_ether_addr(dev->dev_addr))
783 return -EADDRNOTAVAIL;
784
785 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
786 if (err)
787 return err;
788
789 return ieee80211_do_open(&sdata->wdev, true);
790 }
791
792 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
793 bool going_down)
794 {
795 struct ieee80211_sub_if_data *txq_sdata = sdata;
796 struct ieee80211_local *local = sdata->local;
797 struct fq *fq = &local->fq;
798 unsigned long flags;
799 struct sk_buff *skb, *tmp;
800 u32 hw_reconf_flags = 0;
801 int i, flushed;
802 struct ps_data *ps;
803 struct cfg80211_chan_def chandef;
804 bool cancel_scan;
805 struct cfg80211_nan_func *func;
806
807 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
808
809 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
810 if (cancel_scan)
811 ieee80211_scan_cancel(local);
812
813 /*
814 * Stop TX on this interface first.
815 */
816 if (sdata->dev)
817 netif_tx_stop_all_queues(sdata->dev);
818
819 ieee80211_roc_purge(local, sdata);
820
821 switch (sdata->vif.type) {
822 case NL80211_IFTYPE_STATION:
823 ieee80211_mgd_stop(sdata);
824 break;
825 case NL80211_IFTYPE_ADHOC:
826 ieee80211_ibss_stop(sdata);
827 break;
828 case NL80211_IFTYPE_AP:
829 cancel_work_sync(&sdata->u.ap.request_smps_work);
830 break;
831 case NL80211_IFTYPE_MONITOR:
832 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
833 break;
834 list_del_rcu(&sdata->u.mntr.list);
835 break;
836 default:
837 break;
838 }
839
840 /*
841 * Remove all stations associated with this interface.
842 *
843 * This must be done before calling ops->remove_interface()
844 * because otherwise we can later invoke ops->sta_notify()
845 * whenever the STAs are removed, and that invalidates driver
846 * assumptions about always getting a vif pointer that is valid
847 * (because if we remove a STA after ops->remove_interface()
848 * the driver will have removed the vif info already!)
849 *
850 * In WDS mode a station must exist here and be flushed, for
851 * AP_VLANs stations may exist since there's nothing else that
852 * would have removed them, but in other modes there shouldn't
853 * be any stations.
854 */
855 flushed = sta_info_flush(sdata);
856 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
857 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
858 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
859
860 /* don't count this interface for allmulti while it is down */
861 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
862 atomic_dec(&local->iff_allmultis);
863
864 if (sdata->vif.type == NL80211_IFTYPE_AP) {
865 local->fif_pspoll--;
866 local->fif_probe_req--;
867 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
868 local->fif_probe_req--;
869 }
870
871 if (sdata->dev) {
872 netif_addr_lock_bh(sdata->dev);
873 spin_lock_bh(&local->filter_lock);
874 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
875 sdata->dev->addr_len);
876 spin_unlock_bh(&local->filter_lock);
877 netif_addr_unlock_bh(sdata->dev);
878 }
879
880 del_timer_sync(&local->dynamic_ps_timer);
881 cancel_work_sync(&local->dynamic_ps_enable_work);
882
883 cancel_work_sync(&sdata->recalc_smps);
884 sdata_lock(sdata);
885 mutex_lock(&local->mtx);
886 sdata->vif.csa_active = false;
887 if (sdata->vif.type == NL80211_IFTYPE_STATION)
888 sdata->u.mgd.csa_waiting_bcn = false;
889 if (sdata->csa_block_tx) {
890 ieee80211_wake_vif_queues(local, sdata,
891 IEEE80211_QUEUE_STOP_REASON_CSA);
892 sdata->csa_block_tx = false;
893 }
894 mutex_unlock(&local->mtx);
895 sdata_unlock(sdata);
896
897 cancel_work_sync(&sdata->csa_finalize_work);
898
899 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
900
901 if (sdata->wdev.cac_started) {
902 chandef = sdata->vif.bss_conf.chandef;
903 WARN_ON(local->suspended);
904 mutex_lock(&local->mtx);
905 ieee80211_vif_release_channel(sdata);
906 mutex_unlock(&local->mtx);
907 cfg80211_cac_event(sdata->dev, &chandef,
908 NL80211_RADAR_CAC_ABORTED,
909 GFP_KERNEL);
910 }
911
912 /* APs need special treatment */
913 if (sdata->vif.type == NL80211_IFTYPE_AP) {
914 struct ieee80211_sub_if_data *vlan, *tmpsdata;
915
916 /* down all dependent devices, that is VLANs */
917 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
918 u.vlan.list)
919 dev_close(vlan->dev);
920 WARN_ON(!list_empty(&sdata->u.ap.vlans));
921 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
922 /* remove all packets in parent bc_buf pointing to this dev */
923 ps = &sdata->bss->ps;
924
925 spin_lock_irqsave(&ps->bc_buf.lock, flags);
926 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
927 if (skb->dev == sdata->dev) {
928 __skb_unlink(skb, &ps->bc_buf);
929 local->total_ps_buffered--;
930 ieee80211_free_txskb(&local->hw, skb);
931 }
932 }
933 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
934 }
935
936 if (going_down)
937 local->open_count--;
938
939 switch (sdata->vif.type) {
940 case NL80211_IFTYPE_AP_VLAN:
941 txq_sdata = container_of(sdata->bss,
942 struct ieee80211_sub_if_data, u.ap);
943
944 mutex_lock(&local->mtx);
945 list_del(&sdata->u.vlan.list);
946 mutex_unlock(&local->mtx);
947 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
948 /* see comment in the default case below */
949 ieee80211_free_keys(sdata, true);
950 /* no need to tell driver */
951 break;
952 case NL80211_IFTYPE_MONITOR:
953 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
954 local->cooked_mntrs--;
955 break;
956 }
957
958 local->monitors--;
959 if (local->monitors == 0) {
960 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
961 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
962 }
963
964 ieee80211_adjust_monitor_flags(sdata, -1);
965 break;
966 case NL80211_IFTYPE_NAN:
967 /* clean all the functions */
968 spin_lock_bh(&sdata->u.nan.func_lock);
969
970 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
971 idr_remove(&sdata->u.nan.function_inst_ids, i);
972 cfg80211_free_nan_func(func);
973 }
974 idr_destroy(&sdata->u.nan.function_inst_ids);
975
976 spin_unlock_bh(&sdata->u.nan.func_lock);
977 break;
978 case NL80211_IFTYPE_P2P_DEVICE:
979 /* relies on synchronize_rcu() below */
980 RCU_INIT_POINTER(local->p2p_sdata, NULL);
981 /* fall through */
982 default:
983 cancel_work_sync(&sdata->work);
984 /*
985 * When we get here, the interface is marked down.
986 * Free the remaining keys, if there are any
987 * (which can happen in AP mode if userspace sets
988 * keys before the interface is operating, and maybe
989 * also in WDS mode)
990 *
991 * Force the key freeing to always synchronize_net()
992 * to wait for the RX path in case it is using this
993 * interface enqueuing frames at this very time on
994 * another CPU.
995 */
996 ieee80211_free_keys(sdata, true);
997 skb_queue_purge(&sdata->skb_queue);
998 }
999
1000 sdata->bss = NULL;
1001
1002 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1003 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1004 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1005 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1006 if (info->control.vif == &sdata->vif) {
1007 __skb_unlink(skb, &local->pending[i]);
1008 ieee80211_free_txskb(&local->hw, skb);
1009 }
1010 }
1011 }
1012 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1013
1014 if (txq_sdata->vif.txq) {
1015 struct txq_info *txqi = to_txq_info(txq_sdata->vif.txq);
1016
1017 /*
1018 * FIXME FIXME
1019 *
1020 * We really shouldn't purge the *entire* txqi since that
1021 * contains frames for the other AP_VLANs (and possibly
1022 * the AP itself) as well, but there's no API in FQ now
1023 * to be able to filter.
1024 */
1025
1026 spin_lock_bh(&fq->lock);
1027 ieee80211_txq_purge(local, txqi);
1028 spin_unlock_bh(&fq->lock);
1029 }
1030
1031 if (local->open_count == 0)
1032 ieee80211_clear_tx_pending(local);
1033
1034 /*
1035 * If the interface goes down while suspended, presumably because
1036 * the device was unplugged and that happens before our resume,
1037 * then the driver is already unconfigured and the remainder of
1038 * this function isn't needed.
1039 * XXX: what about WoWLAN? If the device has software state, e.g.
1040 * memory allocated, it might expect teardown commands from
1041 * mac80211 here?
1042 */
1043 if (local->suspended) {
1044 WARN_ON(local->wowlan);
1045 WARN_ON(rtnl_dereference(local->monitor_sdata));
1046 return;
1047 }
1048
1049 switch (sdata->vif.type) {
1050 case NL80211_IFTYPE_AP_VLAN:
1051 break;
1052 case NL80211_IFTYPE_MONITOR:
1053 if (local->monitors == 0)
1054 ieee80211_del_virtual_monitor(local);
1055
1056 mutex_lock(&local->mtx);
1057 ieee80211_recalc_idle(local);
1058 mutex_unlock(&local->mtx);
1059
1060 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1061 break;
1062
1063 /* fall through */
1064 default:
1065 if (going_down)
1066 drv_remove_interface(local, sdata);
1067 }
1068
1069 ieee80211_recalc_ps(local);
1070
1071 if (cancel_scan)
1072 flush_delayed_work(&local->scan_work);
1073
1074 if (local->open_count == 0) {
1075 ieee80211_stop_device(local);
1076
1077 /* no reconfiguring after stop! */
1078 return;
1079 }
1080
1081 /* do after stop to avoid reconfiguring when we stop anyway */
1082 ieee80211_configure_filter(local);
1083 ieee80211_hw_config(local, hw_reconf_flags);
1084
1085 if (local->monitors == local->open_count)
1086 ieee80211_add_virtual_monitor(local);
1087 }
1088
1089 static int ieee80211_stop(struct net_device *dev)
1090 {
1091 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1092
1093 ieee80211_do_stop(sdata, true);
1094
1095 return 0;
1096 }
1097
1098 static void ieee80211_set_multicast_list(struct net_device *dev)
1099 {
1100 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1101 struct ieee80211_local *local = sdata->local;
1102 int allmulti, sdata_allmulti;
1103
1104 allmulti = !!(dev->flags & IFF_ALLMULTI);
1105 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1106
1107 if (allmulti != sdata_allmulti) {
1108 if (dev->flags & IFF_ALLMULTI)
1109 atomic_inc(&local->iff_allmultis);
1110 else
1111 atomic_dec(&local->iff_allmultis);
1112 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1113 }
1114
1115 spin_lock_bh(&local->filter_lock);
1116 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1117 spin_unlock_bh(&local->filter_lock);
1118 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1119 }
1120
1121 /*
1122 * Called when the netdev is removed or, by the code below, before
1123 * the interface type changes.
1124 */
1125 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1126 {
1127 int i;
1128
1129 /* free extra data */
1130 ieee80211_free_keys(sdata, false);
1131
1132 ieee80211_debugfs_remove_netdev(sdata);
1133
1134 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1135 __skb_queue_purge(&sdata->fragments[i].skb_list);
1136 sdata->fragment_next = 0;
1137
1138 if (ieee80211_vif_is_mesh(&sdata->vif))
1139 ieee80211_mesh_teardown_sdata(sdata);
1140 }
1141
1142 static void ieee80211_uninit(struct net_device *dev)
1143 {
1144 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1145 }
1146
1147 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1148 struct sk_buff *skb,
1149 void *accel_priv,
1150 select_queue_fallback_t fallback)
1151 {
1152 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1153 }
1154
1155 static void
1156 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1157 {
1158 int i;
1159
1160 for_each_possible_cpu(i) {
1161 const struct pcpu_sw_netstats *tstats;
1162 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1163 unsigned int start;
1164
1165 tstats = per_cpu_ptr(dev->tstats, i);
1166
1167 do {
1168 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1169 rx_packets = tstats->rx_packets;
1170 tx_packets = tstats->tx_packets;
1171 rx_bytes = tstats->rx_bytes;
1172 tx_bytes = tstats->tx_bytes;
1173 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1174
1175 stats->rx_packets += rx_packets;
1176 stats->tx_packets += tx_packets;
1177 stats->rx_bytes += rx_bytes;
1178 stats->tx_bytes += tx_bytes;
1179 }
1180 }
1181
1182 static const struct net_device_ops ieee80211_dataif_ops = {
1183 .ndo_open = ieee80211_open,
1184 .ndo_stop = ieee80211_stop,
1185 .ndo_uninit = ieee80211_uninit,
1186 .ndo_start_xmit = ieee80211_subif_start_xmit,
1187 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1188 .ndo_set_mac_address = ieee80211_change_mac,
1189 .ndo_select_queue = ieee80211_netdev_select_queue,
1190 .ndo_get_stats64 = ieee80211_get_stats64,
1191 };
1192
1193 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1194 struct sk_buff *skb,
1195 void *accel_priv,
1196 select_queue_fallback_t fallback)
1197 {
1198 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1199 struct ieee80211_local *local = sdata->local;
1200 struct ieee80211_hdr *hdr;
1201 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1202
1203 if (local->hw.queues < IEEE80211_NUM_ACS)
1204 return 0;
1205
1206 if (skb->len < 4 ||
1207 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1208 return 0; /* doesn't matter, frame will be dropped */
1209
1210 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1211
1212 return ieee80211_select_queue_80211(sdata, skb, hdr);
1213 }
1214
1215 static const struct net_device_ops ieee80211_monitorif_ops = {
1216 .ndo_open = ieee80211_open,
1217 .ndo_stop = ieee80211_stop,
1218 .ndo_uninit = ieee80211_uninit,
1219 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1220 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1221 .ndo_set_mac_address = ieee80211_change_mac,
1222 .ndo_select_queue = ieee80211_monitor_select_queue,
1223 .ndo_get_stats64 = ieee80211_get_stats64,
1224 };
1225
1226 static void ieee80211_if_free(struct net_device *dev)
1227 {
1228 free_percpu(dev->tstats);
1229 }
1230
1231 static void ieee80211_if_setup(struct net_device *dev)
1232 {
1233 ether_setup(dev);
1234 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1235 dev->netdev_ops = &ieee80211_dataif_ops;
1236 dev->needs_free_netdev = true;
1237 dev->priv_destructor = ieee80211_if_free;
1238 }
1239
1240 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1241 {
1242 ieee80211_if_setup(dev);
1243 dev->priv_flags |= IFF_NO_QUEUE;
1244 }
1245
1246 static void ieee80211_iface_work(struct work_struct *work)
1247 {
1248 struct ieee80211_sub_if_data *sdata =
1249 container_of(work, struct ieee80211_sub_if_data, work);
1250 struct ieee80211_local *local = sdata->local;
1251 struct sk_buff *skb;
1252 struct sta_info *sta;
1253
1254 if (!ieee80211_sdata_running(sdata))
1255 return;
1256
1257 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1258 return;
1259
1260 if (!ieee80211_can_run_worker(local))
1261 return;
1262
1263 /* first process frames */
1264 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1265 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1266
1267 if (ieee80211_is_action(mgmt->frame_control) &&
1268 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1269 int len = skb->len;
1270
1271 mutex_lock(&local->sta_mtx);
1272 sta = sta_info_get_bss(sdata, mgmt->sa);
1273 if (sta) {
1274 switch (mgmt->u.action.u.addba_req.action_code) {
1275 case WLAN_ACTION_ADDBA_REQ:
1276 ieee80211_process_addba_request(
1277 local, sta, mgmt, len);
1278 break;
1279 case WLAN_ACTION_ADDBA_RESP:
1280 ieee80211_process_addba_resp(local, sta,
1281 mgmt, len);
1282 break;
1283 case WLAN_ACTION_DELBA:
1284 ieee80211_process_delba(sdata, sta,
1285 mgmt, len);
1286 break;
1287 default:
1288 WARN_ON(1);
1289 break;
1290 }
1291 }
1292 mutex_unlock(&local->sta_mtx);
1293 } else if (ieee80211_is_action(mgmt->frame_control) &&
1294 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1295 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1296 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1297 struct ieee80211_rx_status *status;
1298 enum nl80211_band band;
1299 u8 opmode;
1300
1301 status = IEEE80211_SKB_RXCB(skb);
1302 band = status->band;
1303 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1304
1305 mutex_lock(&local->sta_mtx);
1306 sta = sta_info_get_bss(sdata, mgmt->sa);
1307
1308 if (sta)
1309 ieee80211_vht_handle_opmode(sdata, sta,
1310 opmode,
1311 band);
1312
1313 mutex_unlock(&local->sta_mtx);
1314 break;
1315 }
1316 case WLAN_VHT_ACTION_GROUPID_MGMT:
1317 ieee80211_process_mu_groups(sdata, mgmt);
1318 break;
1319 default:
1320 WARN_ON(1);
1321 break;
1322 }
1323 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1324 struct ieee80211_hdr *hdr = (void *)mgmt;
1325 /*
1326 * So the frame isn't mgmt, but frame_control
1327 * is at the right place anyway, of course, so
1328 * the if statement is correct.
1329 *
1330 * Warn if we have other data frame types here,
1331 * they must not get here.
1332 */
1333 WARN_ON(hdr->frame_control &
1334 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1335 WARN_ON(!(hdr->seq_ctrl &
1336 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1337 /*
1338 * This was a fragment of a frame, received while
1339 * a block-ack session was active. That cannot be
1340 * right, so terminate the session.
1341 */
1342 mutex_lock(&local->sta_mtx);
1343 sta = sta_info_get_bss(sdata, mgmt->sa);
1344 if (sta) {
1345 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1346 IEEE80211_QOS_CTL_TID_MASK;
1347
1348 __ieee80211_stop_rx_ba_session(
1349 sta, tid, WLAN_BACK_RECIPIENT,
1350 WLAN_REASON_QSTA_REQUIRE_SETUP,
1351 true);
1352 }
1353 mutex_unlock(&local->sta_mtx);
1354 } else switch (sdata->vif.type) {
1355 case NL80211_IFTYPE_STATION:
1356 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1357 break;
1358 case NL80211_IFTYPE_ADHOC:
1359 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1360 break;
1361 case NL80211_IFTYPE_MESH_POINT:
1362 if (!ieee80211_vif_is_mesh(&sdata->vif))
1363 break;
1364 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1365 break;
1366 default:
1367 WARN(1, "frame for unexpected interface type");
1368 break;
1369 }
1370
1371 kfree_skb(skb);
1372 }
1373
1374 /* then other type-dependent work */
1375 switch (sdata->vif.type) {
1376 case NL80211_IFTYPE_STATION:
1377 ieee80211_sta_work(sdata);
1378 break;
1379 case NL80211_IFTYPE_ADHOC:
1380 ieee80211_ibss_work(sdata);
1381 break;
1382 case NL80211_IFTYPE_MESH_POINT:
1383 if (!ieee80211_vif_is_mesh(&sdata->vif))
1384 break;
1385 ieee80211_mesh_work(sdata);
1386 break;
1387 case NL80211_IFTYPE_OCB:
1388 ieee80211_ocb_work(sdata);
1389 break;
1390 default:
1391 break;
1392 }
1393 }
1394
1395 static void ieee80211_recalc_smps_work(struct work_struct *work)
1396 {
1397 struct ieee80211_sub_if_data *sdata =
1398 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1399
1400 ieee80211_recalc_smps(sdata);
1401 }
1402
1403 /*
1404 * Helper function to initialise an interface to a specific type.
1405 */
1406 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1407 enum nl80211_iftype type)
1408 {
1409 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1410 0xff, 0xff, 0xff};
1411
1412 /* clear type-dependent union */
1413 memset(&sdata->u, 0, sizeof(sdata->u));
1414
1415 /* and set some type-dependent values */
1416 sdata->vif.type = type;
1417 sdata->vif.p2p = false;
1418 sdata->wdev.iftype = type;
1419
1420 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1421 sdata->control_port_no_encrypt = false;
1422 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1423 sdata->vif.bss_conf.idle = true;
1424
1425 sdata->noack_map = 0;
1426
1427 /* only monitor/p2p-device differ */
1428 if (sdata->dev) {
1429 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1430 sdata->dev->type = ARPHRD_ETHER;
1431 }
1432
1433 skb_queue_head_init(&sdata->skb_queue);
1434 INIT_WORK(&sdata->work, ieee80211_iface_work);
1435 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1436 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1437 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1438 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1439
1440 switch (type) {
1441 case NL80211_IFTYPE_P2P_GO:
1442 type = NL80211_IFTYPE_AP;
1443 sdata->vif.type = type;
1444 sdata->vif.p2p = true;
1445 /* fall through */
1446 case NL80211_IFTYPE_AP:
1447 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1448 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1449 INIT_WORK(&sdata->u.ap.request_smps_work,
1450 ieee80211_request_smps_ap_work);
1451 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1452 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1453 break;
1454 case NL80211_IFTYPE_P2P_CLIENT:
1455 type = NL80211_IFTYPE_STATION;
1456 sdata->vif.type = type;
1457 sdata->vif.p2p = true;
1458 /* fall through */
1459 case NL80211_IFTYPE_STATION:
1460 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1461 ieee80211_sta_setup_sdata(sdata);
1462 break;
1463 case NL80211_IFTYPE_OCB:
1464 sdata->vif.bss_conf.bssid = bssid_wildcard;
1465 ieee80211_ocb_setup_sdata(sdata);
1466 break;
1467 case NL80211_IFTYPE_ADHOC:
1468 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1469 ieee80211_ibss_setup_sdata(sdata);
1470 break;
1471 case NL80211_IFTYPE_MESH_POINT:
1472 if (ieee80211_vif_is_mesh(&sdata->vif))
1473 ieee80211_mesh_init_sdata(sdata);
1474 break;
1475 case NL80211_IFTYPE_MONITOR:
1476 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1477 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1478 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1479 MONITOR_FLAG_OTHER_BSS;
1480 break;
1481 case NL80211_IFTYPE_WDS:
1482 sdata->vif.bss_conf.bssid = NULL;
1483 break;
1484 case NL80211_IFTYPE_NAN:
1485 idr_init(&sdata->u.nan.function_inst_ids);
1486 spin_lock_init(&sdata->u.nan.func_lock);
1487 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1488 break;
1489 case NL80211_IFTYPE_AP_VLAN:
1490 case NL80211_IFTYPE_P2P_DEVICE:
1491 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1492 break;
1493 case NL80211_IFTYPE_UNSPECIFIED:
1494 case NUM_NL80211_IFTYPES:
1495 BUG();
1496 break;
1497 }
1498
1499 ieee80211_debugfs_add_netdev(sdata);
1500 }
1501
1502 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1503 enum nl80211_iftype type)
1504 {
1505 struct ieee80211_local *local = sdata->local;
1506 int ret, err;
1507 enum nl80211_iftype internal_type = type;
1508 bool p2p = false;
1509
1510 ASSERT_RTNL();
1511
1512 if (!local->ops->change_interface)
1513 return -EBUSY;
1514
1515 switch (sdata->vif.type) {
1516 case NL80211_IFTYPE_AP:
1517 case NL80211_IFTYPE_STATION:
1518 case NL80211_IFTYPE_ADHOC:
1519 case NL80211_IFTYPE_OCB:
1520 /*
1521 * Could maybe also all others here?
1522 * Just not sure how that interacts
1523 * with the RX/config path e.g. for
1524 * mesh.
1525 */
1526 break;
1527 default:
1528 return -EBUSY;
1529 }
1530
1531 switch (type) {
1532 case NL80211_IFTYPE_AP:
1533 case NL80211_IFTYPE_STATION:
1534 case NL80211_IFTYPE_ADHOC:
1535 case NL80211_IFTYPE_OCB:
1536 /*
1537 * Could probably support everything
1538 * but WDS here (WDS do_open can fail
1539 * under memory pressure, which this
1540 * code isn't prepared to handle).
1541 */
1542 break;
1543 case NL80211_IFTYPE_P2P_CLIENT:
1544 p2p = true;
1545 internal_type = NL80211_IFTYPE_STATION;
1546 break;
1547 case NL80211_IFTYPE_P2P_GO:
1548 p2p = true;
1549 internal_type = NL80211_IFTYPE_AP;
1550 break;
1551 default:
1552 return -EBUSY;
1553 }
1554
1555 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1556 if (ret)
1557 return ret;
1558
1559 ieee80211_do_stop(sdata, false);
1560
1561 ieee80211_teardown_sdata(sdata);
1562
1563 ret = drv_change_interface(local, sdata, internal_type, p2p);
1564 if (ret)
1565 type = ieee80211_vif_type_p2p(&sdata->vif);
1566
1567 /*
1568 * Ignore return value here, there's not much we can do since
1569 * the driver changed the interface type internally already.
1570 * The warnings will hopefully make driver authors fix it :-)
1571 */
1572 ieee80211_check_queues(sdata, type);
1573
1574 ieee80211_setup_sdata(sdata, type);
1575
1576 err = ieee80211_do_open(&sdata->wdev, false);
1577 WARN(err, "type change: do_open returned %d", err);
1578
1579 return ret;
1580 }
1581
1582 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1583 enum nl80211_iftype type)
1584 {
1585 int ret;
1586
1587 ASSERT_RTNL();
1588
1589 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1590 return 0;
1591
1592 if (ieee80211_sdata_running(sdata)) {
1593 ret = ieee80211_runtime_change_iftype(sdata, type);
1594 if (ret)
1595 return ret;
1596 } else {
1597 /* Purge and reset type-dependent state. */
1598 ieee80211_teardown_sdata(sdata);
1599 ieee80211_setup_sdata(sdata, type);
1600 }
1601
1602 /* reset some values that shouldn't be kept across type changes */
1603 if (type == NL80211_IFTYPE_STATION)
1604 sdata->u.mgd.use_4addr = false;
1605
1606 return 0;
1607 }
1608
1609 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1610 u8 *perm_addr, enum nl80211_iftype type)
1611 {
1612 struct ieee80211_sub_if_data *sdata;
1613 u64 mask, start, addr, val, inc;
1614 u8 *m;
1615 u8 tmp_addr[ETH_ALEN];
1616 int i;
1617
1618 /* default ... something at least */
1619 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1620
1621 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1622 local->hw.wiphy->n_addresses <= 1)
1623 return;
1624
1625 mutex_lock(&local->iflist_mtx);
1626
1627 switch (type) {
1628 case NL80211_IFTYPE_MONITOR:
1629 /* doesn't matter */
1630 break;
1631 case NL80211_IFTYPE_WDS:
1632 case NL80211_IFTYPE_AP_VLAN:
1633 /* match up with an AP interface */
1634 list_for_each_entry(sdata, &local->interfaces, list) {
1635 if (sdata->vif.type != NL80211_IFTYPE_AP)
1636 continue;
1637 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1638 break;
1639 }
1640 /* keep default if no AP interface present */
1641 break;
1642 case NL80211_IFTYPE_P2P_CLIENT:
1643 case NL80211_IFTYPE_P2P_GO:
1644 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1645 list_for_each_entry(sdata, &local->interfaces, list) {
1646 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1647 continue;
1648 if (!ieee80211_sdata_running(sdata))
1649 continue;
1650 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1651 goto out_unlock;
1652 }
1653 }
1654 /* otherwise fall through */
1655 default:
1656 /* assign a new address if possible -- try n_addresses first */
1657 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1658 bool used = false;
1659
1660 list_for_each_entry(sdata, &local->interfaces, list) {
1661 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1662 sdata->vif.addr)) {
1663 used = true;
1664 break;
1665 }
1666 }
1667
1668 if (!used) {
1669 memcpy(perm_addr,
1670 local->hw.wiphy->addresses[i].addr,
1671 ETH_ALEN);
1672 break;
1673 }
1674 }
1675
1676 /* try mask if available */
1677 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1678 break;
1679
1680 m = local->hw.wiphy->addr_mask;
1681 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1682 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1683 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1684
1685 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1686 /* not a contiguous mask ... not handled now! */
1687 pr_info("not contiguous\n");
1688 break;
1689 }
1690
1691 /*
1692 * Pick address of existing interface in case user changed
1693 * MAC address manually, default to perm_addr.
1694 */
1695 m = local->hw.wiphy->perm_addr;
1696 list_for_each_entry(sdata, &local->interfaces, list) {
1697 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1698 continue;
1699 m = sdata->vif.addr;
1700 break;
1701 }
1702 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1703 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1704 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1705
1706 inc = 1ULL<<__ffs64(mask);
1707 val = (start & mask);
1708 addr = (start & ~mask) | (val & mask);
1709 do {
1710 bool used = false;
1711
1712 tmp_addr[5] = addr >> 0*8;
1713 tmp_addr[4] = addr >> 1*8;
1714 tmp_addr[3] = addr >> 2*8;
1715 tmp_addr[2] = addr >> 3*8;
1716 tmp_addr[1] = addr >> 4*8;
1717 tmp_addr[0] = addr >> 5*8;
1718
1719 val += inc;
1720
1721 list_for_each_entry(sdata, &local->interfaces, list) {
1722 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1723 used = true;
1724 break;
1725 }
1726 }
1727
1728 if (!used) {
1729 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1730 break;
1731 }
1732 addr = (start & ~mask) | (val & mask);
1733 } while (addr != start);
1734
1735 break;
1736 }
1737
1738 out_unlock:
1739 mutex_unlock(&local->iflist_mtx);
1740 }
1741
1742 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1743 unsigned char name_assign_type,
1744 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1745 struct vif_params *params)
1746 {
1747 struct net_device *ndev = NULL;
1748 struct ieee80211_sub_if_data *sdata = NULL;
1749 struct txq_info *txqi;
1750 void (*if_setup)(struct net_device *dev);
1751 int ret, i;
1752 int txqs = 1;
1753
1754 ASSERT_RTNL();
1755
1756 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1757 struct wireless_dev *wdev;
1758
1759 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1760 GFP_KERNEL);
1761 if (!sdata)
1762 return -ENOMEM;
1763 wdev = &sdata->wdev;
1764
1765 sdata->dev = NULL;
1766 strlcpy(sdata->name, name, IFNAMSIZ);
1767 ieee80211_assign_perm_addr(local, wdev->address, type);
1768 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1769 } else {
1770 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1771 sizeof(void *));
1772 int txq_size = 0;
1773
1774 if (local->ops->wake_tx_queue)
1775 txq_size += sizeof(struct txq_info) +
1776 local->hw.txq_data_size;
1777
1778 if (local->ops->wake_tx_queue)
1779 if_setup = ieee80211_if_setup_no_queue;
1780 else
1781 if_setup = ieee80211_if_setup;
1782
1783 if (local->hw.queues >= IEEE80211_NUM_ACS)
1784 txqs = IEEE80211_NUM_ACS;
1785
1786 ndev = alloc_netdev_mqs(size + txq_size,
1787 name, name_assign_type,
1788 if_setup, txqs, 1);
1789 if (!ndev)
1790 return -ENOMEM;
1791 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1792
1793 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1794 if (!ndev->tstats) {
1795 free_netdev(ndev);
1796 return -ENOMEM;
1797 }
1798
1799 ndev->needed_headroom = local->tx_headroom +
1800 4*6 /* four MAC addresses */
1801 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1802 + 6 /* mesh */
1803 + 8 /* rfc1042/bridge tunnel */
1804 - ETH_HLEN /* ethernet hard_header_len */
1805 + IEEE80211_ENCRYPT_HEADROOM;
1806 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1807
1808 ret = dev_alloc_name(ndev, ndev->name);
1809 if (ret < 0) {
1810 ieee80211_if_free(ndev);
1811 free_netdev(ndev);
1812 return ret;
1813 }
1814
1815 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1816 if (params && is_valid_ether_addr(params->macaddr))
1817 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1818 else
1819 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1820 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1821
1822 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1823 sdata = netdev_priv(ndev);
1824 ndev->ieee80211_ptr = &sdata->wdev;
1825 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1826 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1827
1828 if (txq_size) {
1829 txqi = netdev_priv(ndev) + size;
1830 ieee80211_txq_init(sdata, NULL, txqi, 0);
1831 }
1832
1833 sdata->dev = ndev;
1834 }
1835
1836 /* initialise type-independent data */
1837 sdata->wdev.wiphy = local->hw.wiphy;
1838 sdata->local = local;
1839
1840 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1841 skb_queue_head_init(&sdata->fragments[i].skb_list);
1842
1843 INIT_LIST_HEAD(&sdata->key_list);
1844
1845 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1846 ieee80211_dfs_cac_timer_work);
1847 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1848 ieee80211_delayed_tailroom_dec);
1849
1850 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1851 struct ieee80211_supported_band *sband;
1852 sband = local->hw.wiphy->bands[i];
1853 sdata->rc_rateidx_mask[i] =
1854 sband ? (1 << sband->n_bitrates) - 1 : 0;
1855 if (sband) {
1856 __le16 cap;
1857 u16 *vht_rate_mask;
1858
1859 memcpy(sdata->rc_rateidx_mcs_mask[i],
1860 sband->ht_cap.mcs.rx_mask,
1861 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1862
1863 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1864 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1865 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1866 } else {
1867 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1868 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1869 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1870 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1871 }
1872 }
1873
1874 ieee80211_set_default_queues(sdata);
1875
1876 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1877 sdata->user_power_level = local->user_power_level;
1878
1879 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1880
1881 /* setup type-dependent data */
1882 ieee80211_setup_sdata(sdata, type);
1883
1884 if (ndev) {
1885 if (params) {
1886 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1887 if (type == NL80211_IFTYPE_STATION)
1888 sdata->u.mgd.use_4addr = params->use_4addr;
1889 }
1890
1891 ndev->features |= local->hw.netdev_features;
1892
1893 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1894
1895 /* MTU range: 256 - 2304 */
1896 ndev->min_mtu = 256;
1897 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1898
1899 ret = register_netdevice(ndev);
1900 if (ret) {
1901 free_netdev(ndev);
1902 return ret;
1903 }
1904 }
1905
1906 mutex_lock(&local->iflist_mtx);
1907 list_add_tail_rcu(&sdata->list, &local->interfaces);
1908 mutex_unlock(&local->iflist_mtx);
1909
1910 if (new_wdev)
1911 *new_wdev = &sdata->wdev;
1912
1913 return 0;
1914 }
1915
1916 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1917 {
1918 ASSERT_RTNL();
1919
1920 mutex_lock(&sdata->local->iflist_mtx);
1921 list_del_rcu(&sdata->list);
1922 mutex_unlock(&sdata->local->iflist_mtx);
1923
1924 synchronize_rcu();
1925
1926 if (sdata->dev) {
1927 unregister_netdevice(sdata->dev);
1928 } else {
1929 cfg80211_unregister_wdev(&sdata->wdev);
1930 ieee80211_teardown_sdata(sdata);
1931 kfree(sdata);
1932 }
1933 }
1934
1935 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1936 {
1937 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1938 return;
1939 ieee80211_do_stop(sdata, true);
1940 }
1941
1942 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1943 {
1944 struct ieee80211_sub_if_data *sdata, *tmp;
1945 LIST_HEAD(unreg_list);
1946 LIST_HEAD(wdev_list);
1947
1948 ASSERT_RTNL();
1949
1950 /* Before destroying the interfaces, make sure they're all stopped so
1951 * that the hardware is stopped. Otherwise, the driver might still be
1952 * iterating the interfaces during the shutdown, e.g. from a worker
1953 * or from RX processing or similar, and if it does so (using atomic
1954 * iteration) while we're manipulating the list, the iteration will
1955 * crash.
1956 *
1957 * After this, the hardware should be stopped and the driver should
1958 * have stopped all of its activities, so that we can do RCU-unaware
1959 * manipulations of the interface list below.
1960 */
1961 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1962
1963 WARN(local->open_count, "%s: open count remains %d\n",
1964 wiphy_name(local->hw.wiphy), local->open_count);
1965
1966 mutex_lock(&local->iflist_mtx);
1967 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1968 list_del(&sdata->list);
1969
1970 if (sdata->dev)
1971 unregister_netdevice_queue(sdata->dev, &unreg_list);
1972 else
1973 list_add(&sdata->list, &wdev_list);
1974 }
1975 mutex_unlock(&local->iflist_mtx);
1976 unregister_netdevice_many(&unreg_list);
1977
1978 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1979 list_del(&sdata->list);
1980 cfg80211_unregister_wdev(&sdata->wdev);
1981 kfree(sdata);
1982 }
1983 }
1984
1985 static int netdev_notify(struct notifier_block *nb,
1986 unsigned long state, void *ptr)
1987 {
1988 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1989 struct ieee80211_sub_if_data *sdata;
1990
1991 if (state != NETDEV_CHANGENAME)
1992 return NOTIFY_DONE;
1993
1994 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1995 return NOTIFY_DONE;
1996
1997 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1998 return NOTIFY_DONE;
1999
2000 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2001 memcpy(sdata->name, dev->name, IFNAMSIZ);
2002 ieee80211_debugfs_rename_netdev(sdata);
2003
2004 return NOTIFY_OK;
2005 }
2006
2007 static struct notifier_block mac80211_netdev_notifier = {
2008 .notifier_call = netdev_notify,
2009 };
2010
2011 int ieee80211_iface_init(void)
2012 {
2013 return register_netdevice_notifier(&mac80211_netdev_notifier);
2014 }
2015
2016 void ieee80211_iface_exit(void)
2017 {
2018 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2019 }
2020
2021 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2022 {
2023 if (sdata->vif.type == NL80211_IFTYPE_AP)
2024 atomic_inc(&sdata->u.ap.num_mcast_sta);
2025 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2026 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2027 }
2028
2029 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2030 {
2031 if (sdata->vif.type == NL80211_IFTYPE_AP)
2032 atomic_dec(&sdata->u.ap.num_mcast_sta);
2033 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2034 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2035 }
Ubuntu Artful kernel mirror