?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mac80211: keep a separate list of monitor interfaces that are up
[linux/fpc-iii.git] / net / mac80211 / iface.c
blob02d4d6a29b75c7425362da0c17871b9afedd74d0
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 /* XXX: for AP_VLAN, actually track AP queues */
733 netif_tx_start_all_queues(dev);
734 } else if (dev) {
735 unsigned long flags;
736 int n_acs = IEEE80211_NUM_ACS;
737 int ac;
738
739 if (local->hw.queues < IEEE80211_NUM_ACS)
740 n_acs = 1;
741
742 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
743 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
744 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
745 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
746 for (ac = 0; ac < n_acs; ac++) {
747 int ac_queue = sdata->vif.hw_queue[ac];
748
749 if (local->queue_stop_reasons[ac_queue] == 0 &&
750 skb_queue_empty(&local->pending[ac_queue]))
751 netif_start_subqueue(dev, ac);
752 }
753 }
754 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
755 }
756
757 return 0;
758 err_del_interface:
759 drv_remove_interface(local, sdata);
760 err_stop:
761 if (!local->open_count)
762 drv_stop(local);
763 err_del_bss:
764 sdata->bss = NULL;
765 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
766 mutex_lock(&local->mtx);
767 list_del(&sdata->u.vlan.list);
768 mutex_unlock(&local->mtx);
769 }
770 /* might already be clear but that doesn't matter */
771 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
772 return res;
773 }
774
775 static int ieee80211_open(struct net_device *dev)
776 {
777 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
778 int err;
779
780 /* fail early if user set an invalid address */
781 if (!is_valid_ether_addr(dev->dev_addr))
782 return -EADDRNOTAVAIL;
783
784 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
785 if (err)
786 return err;
787
788 return ieee80211_do_open(&sdata->wdev, true);
789 }
790
791 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
792 bool going_down)
793 {
794 struct ieee80211_local *local = sdata->local;
795 struct fq *fq = &local->fq;
796 unsigned long flags;
797 struct sk_buff *skb, *tmp;
798 u32 hw_reconf_flags = 0;
799 int i, flushed;
800 struct ps_data *ps;
801 struct cfg80211_chan_def chandef;
802 bool cancel_scan;
803 struct cfg80211_nan_func *func;
804
805 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
806
807 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
808 if (cancel_scan)
809 ieee80211_scan_cancel(local);
810
811 /*
812 * Stop TX on this interface first.
813 */
814 if (sdata->dev)
815 netif_tx_stop_all_queues(sdata->dev);
816
817 ieee80211_roc_purge(local, sdata);
818
819 switch (sdata->vif.type) {
820 case NL80211_IFTYPE_STATION:
821 ieee80211_mgd_stop(sdata);
822 break;
823 case NL80211_IFTYPE_ADHOC:
824 ieee80211_ibss_stop(sdata);
825 break;
826 case NL80211_IFTYPE_AP:
827 cancel_work_sync(&sdata->u.ap.request_smps_work);
828 break;
829 case NL80211_IFTYPE_MONITOR:
830 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
831 break;
832 list_del_rcu(&sdata->u.mntr.list);
833 break;
834 default:
835 break;
836 }
837
838 /*
839 * Remove all stations associated with this interface.
840 *
841 * This must be done before calling ops->remove_interface()
842 * because otherwise we can later invoke ops->sta_notify()
843 * whenever the STAs are removed, and that invalidates driver
844 * assumptions about always getting a vif pointer that is valid
845 * (because if we remove a STA after ops->remove_interface()
846 * the driver will have removed the vif info already!)
847 *
848 * In WDS mode a station must exist here and be flushed, for
849 * AP_VLANs stations may exist since there's nothing else that
850 * would have removed them, but in other modes there shouldn't
851 * be any stations.
852 */
853 flushed = sta_info_flush(sdata);
854 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
855 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
856 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
857
858 /* don't count this interface for allmulti while it is down */
859 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
860 atomic_dec(&local->iff_allmultis);
861
862 if (sdata->vif.type == NL80211_IFTYPE_AP) {
863 local->fif_pspoll--;
864 local->fif_probe_req--;
865 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
866 local->fif_probe_req--;
867 }
868
869 if (sdata->dev) {
870 netif_addr_lock_bh(sdata->dev);
871 spin_lock_bh(&local->filter_lock);
872 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
873 sdata->dev->addr_len);
874 spin_unlock_bh(&local->filter_lock);
875 netif_addr_unlock_bh(sdata->dev);
876 }
877
878 del_timer_sync(&local->dynamic_ps_timer);
879 cancel_work_sync(&local->dynamic_ps_enable_work);
880
881 cancel_work_sync(&sdata->recalc_smps);
882 sdata_lock(sdata);
883 mutex_lock(&local->mtx);
884 sdata->vif.csa_active = false;
885 if (sdata->vif.type == NL80211_IFTYPE_STATION)
886 sdata->u.mgd.csa_waiting_bcn = false;
887 if (sdata->csa_block_tx) {
888 ieee80211_wake_vif_queues(local, sdata,
889 IEEE80211_QUEUE_STOP_REASON_CSA);
890 sdata->csa_block_tx = false;
891 }
892 mutex_unlock(&local->mtx);
893 sdata_unlock(sdata);
894
895 cancel_work_sync(&sdata->csa_finalize_work);
896
897 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
898
899 if (sdata->wdev.cac_started) {
900 chandef = sdata->vif.bss_conf.chandef;
901 WARN_ON(local->suspended);
902 mutex_lock(&local->mtx);
903 ieee80211_vif_release_channel(sdata);
904 mutex_unlock(&local->mtx);
905 cfg80211_cac_event(sdata->dev, &chandef,
906 NL80211_RADAR_CAC_ABORTED,
907 GFP_KERNEL);
908 }
909
910 /* APs need special treatment */
911 if (sdata->vif.type == NL80211_IFTYPE_AP) {
912 struct ieee80211_sub_if_data *vlan, *tmpsdata;
913
914 /* down all dependent devices, that is VLANs */
915 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
916 u.vlan.list)
917 dev_close(vlan->dev);
918 WARN_ON(!list_empty(&sdata->u.ap.vlans));
919 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
920 /* remove all packets in parent bc_buf pointing to this dev */
921 ps = &sdata->bss->ps;
922
923 spin_lock_irqsave(&ps->bc_buf.lock, flags);
924 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
925 if (skb->dev == sdata->dev) {
926 __skb_unlink(skb, &ps->bc_buf);
927 local->total_ps_buffered--;
928 ieee80211_free_txskb(&local->hw, skb);
929 }
930 }
931 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
932 }
933
934 if (going_down)
935 local->open_count--;
936
937 switch (sdata->vif.type) {
938 case NL80211_IFTYPE_AP_VLAN:
939 mutex_lock(&local->mtx);
940 list_del(&sdata->u.vlan.list);
941 mutex_unlock(&local->mtx);
942 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
943 /* see comment in the default case below */
944 ieee80211_free_keys(sdata, true);
945 /* no need to tell driver */
946 break;
947 case NL80211_IFTYPE_MONITOR:
948 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
949 local->cooked_mntrs--;
950 break;
951 }
952
953 local->monitors--;
954 if (local->monitors == 0) {
955 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
956 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
957 }
958
959 ieee80211_adjust_monitor_flags(sdata, -1);
960 break;
961 case NL80211_IFTYPE_NAN:
962 /* clean all the functions */
963 spin_lock_bh(&sdata->u.nan.func_lock);
964
965 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
966 idr_remove(&sdata->u.nan.function_inst_ids, i);
967 cfg80211_free_nan_func(func);
968 }
969 idr_destroy(&sdata->u.nan.function_inst_ids);
970
971 spin_unlock_bh(&sdata->u.nan.func_lock);
972 break;
973 case NL80211_IFTYPE_P2P_DEVICE:
974 /* relies on synchronize_rcu() below */
975 RCU_INIT_POINTER(local->p2p_sdata, NULL);
976 /* fall through */
977 default:
978 cancel_work_sync(&sdata->work);
979 /*
980 * When we get here, the interface is marked down.
981 * Free the remaining keys, if there are any
982 * (which can happen in AP mode if userspace sets
983 * keys before the interface is operating, and maybe
984 * also in WDS mode)
985 *
986 * Force the key freeing to always synchronize_net()
987 * to wait for the RX path in case it is using this
988 * interface enqueuing frames at this very time on
989 * another CPU.
990 */
991 ieee80211_free_keys(sdata, true);
992 skb_queue_purge(&sdata->skb_queue);
993 }
994
995 sdata->bss = NULL;
996
997 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
998 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
999 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1000 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1001 if (info->control.vif == &sdata->vif) {
1002 __skb_unlink(skb, &local->pending[i]);
1003 ieee80211_free_txskb(&local->hw, skb);
1004 }
1005 }
1006 }
1007 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1008
1009 if (sdata->vif.txq) {
1010 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
1011
1012 spin_lock_bh(&fq->lock);
1013 ieee80211_txq_purge(local, txqi);
1014 spin_unlock_bh(&fq->lock);
1015 }
1016
1017 if (local->open_count == 0)
1018 ieee80211_clear_tx_pending(local);
1019
1020 /*
1021 * If the interface goes down while suspended, presumably because
1022 * the device was unplugged and that happens before our resume,
1023 * then the driver is already unconfigured and the remainder of
1024 * this function isn't needed.
1025 * XXX: what about WoWLAN? If the device has software state, e.g.
1026 * memory allocated, it might expect teardown commands from
1027 * mac80211 here?
1028 */
1029 if (local->suspended) {
1030 WARN_ON(local->wowlan);
1031 WARN_ON(rtnl_dereference(local->monitor_sdata));
1032 return;
1033 }
1034
1035 switch (sdata->vif.type) {
1036 case NL80211_IFTYPE_AP_VLAN:
1037 break;
1038 case NL80211_IFTYPE_MONITOR:
1039 if (local->monitors == 0)
1040 ieee80211_del_virtual_monitor(local);
1041
1042 mutex_lock(&local->mtx);
1043 ieee80211_recalc_idle(local);
1044 mutex_unlock(&local->mtx);
1045
1046 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1047 break;
1048
1049 /* fall through */
1050 default:
1051 if (going_down)
1052 drv_remove_interface(local, sdata);
1053 }
1054
1055 ieee80211_recalc_ps(local);
1056
1057 if (cancel_scan)
1058 flush_delayed_work(&local->scan_work);
1059
1060 if (local->open_count == 0) {
1061 ieee80211_stop_device(local);
1062
1063 /* no reconfiguring after stop! */
1064 return;
1065 }
1066
1067 /* do after stop to avoid reconfiguring when we stop anyway */
1068 ieee80211_configure_filter(local);
1069 ieee80211_hw_config(local, hw_reconf_flags);
1070
1071 if (local->monitors == local->open_count)
1072 ieee80211_add_virtual_monitor(local);
1073 }
1074
1075 static int ieee80211_stop(struct net_device *dev)
1076 {
1077 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1078
1079 ieee80211_do_stop(sdata, true);
1080
1081 return 0;
1082 }
1083
1084 static void ieee80211_set_multicast_list(struct net_device *dev)
1085 {
1086 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1087 struct ieee80211_local *local = sdata->local;
1088 int allmulti, sdata_allmulti;
1089
1090 allmulti = !!(dev->flags & IFF_ALLMULTI);
1091 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1092
1093 if (allmulti != sdata_allmulti) {
1094 if (dev->flags & IFF_ALLMULTI)
1095 atomic_inc(&local->iff_allmultis);
1096 else
1097 atomic_dec(&local->iff_allmultis);
1098 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1099 }
1100
1101 spin_lock_bh(&local->filter_lock);
1102 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1103 spin_unlock_bh(&local->filter_lock);
1104 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1105 }
1106
1107 /*
1108 * Called when the netdev is removed or, by the code below, before
1109 * the interface type changes.
1110 */
1111 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1112 {
1113 int i;
1114
1115 /* free extra data */
1116 ieee80211_free_keys(sdata, false);
1117
1118 ieee80211_debugfs_remove_netdev(sdata);
1119
1120 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1121 __skb_queue_purge(&sdata->fragments[i].skb_list);
1122 sdata->fragment_next = 0;
1123
1124 if (ieee80211_vif_is_mesh(&sdata->vif))
1125 ieee80211_mesh_teardown_sdata(sdata);
1126 }
1127
1128 static void ieee80211_uninit(struct net_device *dev)
1129 {
1130 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1131 }
1132
1133 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1134 struct sk_buff *skb,
1135 void *accel_priv,
1136 select_queue_fallback_t fallback)
1137 {
1138 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1139 }
1140
1141 static void
1142 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1143 {
1144 int i;
1145
1146 for_each_possible_cpu(i) {
1147 const struct pcpu_sw_netstats *tstats;
1148 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1149 unsigned int start;
1150
1151 tstats = per_cpu_ptr(dev->tstats, i);
1152
1153 do {
1154 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1155 rx_packets = tstats->rx_packets;
1156 tx_packets = tstats->tx_packets;
1157 rx_bytes = tstats->rx_bytes;
1158 tx_bytes = tstats->tx_bytes;
1159 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1160
1161 stats->rx_packets += rx_packets;
1162 stats->tx_packets += tx_packets;
1163 stats->rx_bytes += rx_bytes;
1164 stats->tx_bytes += tx_bytes;
1165 }
1166 }
1167
1168 static const struct net_device_ops ieee80211_dataif_ops = {
1169 .ndo_open = ieee80211_open,
1170 .ndo_stop = ieee80211_stop,
1171 .ndo_uninit = ieee80211_uninit,
1172 .ndo_start_xmit = ieee80211_subif_start_xmit,
1173 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1174 .ndo_set_mac_address = ieee80211_change_mac,
1175 .ndo_select_queue = ieee80211_netdev_select_queue,
1176 .ndo_get_stats64 = ieee80211_get_stats64,
1177 };
1178
1179 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1180 struct sk_buff *skb,
1181 void *accel_priv,
1182 select_queue_fallback_t fallback)
1183 {
1184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1185 struct ieee80211_local *local = sdata->local;
1186 struct ieee80211_hdr *hdr;
1187 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1188
1189 if (local->hw.queues < IEEE80211_NUM_ACS)
1190 return 0;
1191
1192 if (skb->len < 4 ||
1193 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1194 return 0; /* doesn't matter, frame will be dropped */
1195
1196 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1197
1198 return ieee80211_select_queue_80211(sdata, skb, hdr);
1199 }
1200
1201 static const struct net_device_ops ieee80211_monitorif_ops = {
1202 .ndo_open = ieee80211_open,
1203 .ndo_stop = ieee80211_stop,
1204 .ndo_uninit = ieee80211_uninit,
1205 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1206 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1207 .ndo_set_mac_address = ieee80211_change_mac,
1208 .ndo_select_queue = ieee80211_monitor_select_queue,
1209 .ndo_get_stats64 = ieee80211_get_stats64,
1210 };
1211
1212 static void ieee80211_if_free(struct net_device *dev)
1213 {
1214 free_percpu(dev->tstats);
1215 free_netdev(dev);
1216 }
1217
1218 static void ieee80211_if_setup(struct net_device *dev)
1219 {
1220 ether_setup(dev);
1221 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1222 dev->netdev_ops = &ieee80211_dataif_ops;
1223 dev->destructor = ieee80211_if_free;
1224 }
1225
1226 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1227 {
1228 ieee80211_if_setup(dev);
1229 dev->priv_flags |= IFF_NO_QUEUE;
1230 }
1231
1232 static void ieee80211_iface_work(struct work_struct *work)
1233 {
1234 struct ieee80211_sub_if_data *sdata =
1235 container_of(work, struct ieee80211_sub_if_data, work);
1236 struct ieee80211_local *local = sdata->local;
1237 struct sk_buff *skb;
1238 struct sta_info *sta;
1239 struct ieee80211_ra_tid *ra_tid;
1240 struct ieee80211_rx_agg *rx_agg;
1241
1242 if (!ieee80211_sdata_running(sdata))
1243 return;
1244
1245 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1246 return;
1247
1248 if (!ieee80211_can_run_worker(local))
1249 return;
1250
1251 /* first process frames */
1252 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1253 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1254
1255 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1256 ra_tid = (void *)&skb->cb;
1257 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1258 ra_tid->tid);
1259 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1260 ra_tid = (void *)&skb->cb;
1261 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1262 ra_tid->tid);
1263 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1264 rx_agg = (void *)&skb->cb;
1265 mutex_lock(&local->sta_mtx);
1266 sta = sta_info_get_bss(sdata, rx_agg->addr);
1267 if (sta)
1268 __ieee80211_start_rx_ba_session(sta,
1269 0, 0, 0, 1, rx_agg->tid,
1270 IEEE80211_MAX_AMPDU_BUF,
1271 false, true);
1272 mutex_unlock(&local->sta_mtx);
1273 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1274 rx_agg = (void *)&skb->cb;
1275 mutex_lock(&local->sta_mtx);
1276 sta = sta_info_get_bss(sdata, rx_agg->addr);
1277 if (sta)
1278 __ieee80211_stop_rx_ba_session(sta,
1279 rx_agg->tid,
1280 WLAN_BACK_RECIPIENT, 0,
1281 false);
1282 mutex_unlock(&local->sta_mtx);
1283 } else if (ieee80211_is_action(mgmt->frame_control) &&
1284 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1285 int len = skb->len;
1286
1287 mutex_lock(&local->sta_mtx);
1288 sta = sta_info_get_bss(sdata, mgmt->sa);
1289 if (sta) {
1290 switch (mgmt->u.action.u.addba_req.action_code) {
1291 case WLAN_ACTION_ADDBA_REQ:
1292 ieee80211_process_addba_request(
1293 local, sta, mgmt, len);
1294 break;
1295 case WLAN_ACTION_ADDBA_RESP:
1296 ieee80211_process_addba_resp(local, sta,
1297 mgmt, len);
1298 break;
1299 case WLAN_ACTION_DELBA:
1300 ieee80211_process_delba(sdata, sta,
1301 mgmt, len);
1302 break;
1303 default:
1304 WARN_ON(1);
1305 break;
1306 }
1307 }
1308 mutex_unlock(&local->sta_mtx);
1309 } else if (ieee80211_is_action(mgmt->frame_control) &&
1310 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1311 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1312 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1313 struct ieee80211_rx_status *status;
1314 enum nl80211_band band;
1315 u8 opmode;
1316
1317 status = IEEE80211_SKB_RXCB(skb);
1318 band = status->band;
1319 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1320
1321 mutex_lock(&local->sta_mtx);
1322 sta = sta_info_get_bss(sdata, mgmt->sa);
1323
1324 if (sta)
1325 ieee80211_vht_handle_opmode(sdata, sta,
1326 opmode,
1327 band);
1328
1329 mutex_unlock(&local->sta_mtx);
1330 break;
1331 }
1332 case WLAN_VHT_ACTION_GROUPID_MGMT:
1333 ieee80211_process_mu_groups(sdata, mgmt);
1334 break;
1335 default:
1336 WARN_ON(1);
1337 break;
1338 }
1339 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1340 struct ieee80211_hdr *hdr = (void *)mgmt;
1341 /*
1342 * So the frame isn't mgmt, but frame_control
1343 * is at the right place anyway, of course, so
1344 * the if statement is correct.
1345 *
1346 * Warn if we have other data frame types here,
1347 * they must not get here.
1348 */
1349 WARN_ON(hdr->frame_control &
1350 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1351 WARN_ON(!(hdr->seq_ctrl &
1352 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1353 /*
1354 * This was a fragment of a frame, received while
1355 * a block-ack session was active. That cannot be
1356 * right, so terminate the session.
1357 */
1358 mutex_lock(&local->sta_mtx);
1359 sta = sta_info_get_bss(sdata, mgmt->sa);
1360 if (sta) {
1361 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1362 IEEE80211_QOS_CTL_TID_MASK;
1363
1364 __ieee80211_stop_rx_ba_session(
1365 sta, tid, WLAN_BACK_RECIPIENT,
1366 WLAN_REASON_QSTA_REQUIRE_SETUP,
1367 true);
1368 }
1369 mutex_unlock(&local->sta_mtx);
1370 } else switch (sdata->vif.type) {
1371 case NL80211_IFTYPE_STATION:
1372 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1373 break;
1374 case NL80211_IFTYPE_ADHOC:
1375 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1376 break;
1377 case NL80211_IFTYPE_MESH_POINT:
1378 if (!ieee80211_vif_is_mesh(&sdata->vif))
1379 break;
1380 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1381 break;
1382 default:
1383 WARN(1, "frame for unexpected interface type");
1384 break;
1385 }
1386
1387 kfree_skb(skb);
1388 }
1389
1390 /* then other type-dependent work */
1391 switch (sdata->vif.type) {
1392 case NL80211_IFTYPE_STATION:
1393 ieee80211_sta_work(sdata);
1394 break;
1395 case NL80211_IFTYPE_ADHOC:
1396 ieee80211_ibss_work(sdata);
1397 break;
1398 case NL80211_IFTYPE_MESH_POINT:
1399 if (!ieee80211_vif_is_mesh(&sdata->vif))
1400 break;
1401 ieee80211_mesh_work(sdata);
1402 break;
1403 case NL80211_IFTYPE_OCB:
1404 ieee80211_ocb_work(sdata);
1405 break;
1406 default:
1407 break;
1408 }
1409 }
1410
1411 static void ieee80211_recalc_smps_work(struct work_struct *work)
1412 {
1413 struct ieee80211_sub_if_data *sdata =
1414 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1415
1416 ieee80211_recalc_smps(sdata);
1417 }
1418
1419 /*
1420 * Helper function to initialise an interface to a specific type.
1421 */
1422 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1423 enum nl80211_iftype type)
1424 {
1425 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1426 0xff, 0xff, 0xff};
1427
1428 /* clear type-dependent union */
1429 memset(&sdata->u, 0, sizeof(sdata->u));
1430
1431 /* and set some type-dependent values */
1432 sdata->vif.type = type;
1433 sdata->vif.p2p = false;
1434 sdata->wdev.iftype = type;
1435
1436 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1437 sdata->control_port_no_encrypt = false;
1438 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1439 sdata->vif.bss_conf.idle = true;
1440
1441 sdata->noack_map = 0;
1442
1443 /* only monitor/p2p-device differ */
1444 if (sdata->dev) {
1445 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1446 sdata->dev->type = ARPHRD_ETHER;
1447 }
1448
1449 skb_queue_head_init(&sdata->skb_queue);
1450 INIT_WORK(&sdata->work, ieee80211_iface_work);
1451 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1452 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1453 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1454 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1455
1456 switch (type) {
1457 case NL80211_IFTYPE_P2P_GO:
1458 type = NL80211_IFTYPE_AP;
1459 sdata->vif.type = type;
1460 sdata->vif.p2p = true;
1461 /* fall through */
1462 case NL80211_IFTYPE_AP:
1463 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1464 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1465 INIT_WORK(&sdata->u.ap.request_smps_work,
1466 ieee80211_request_smps_ap_work);
1467 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1468 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1469 break;
1470 case NL80211_IFTYPE_P2P_CLIENT:
1471 type = NL80211_IFTYPE_STATION;
1472 sdata->vif.type = type;
1473 sdata->vif.p2p = true;
1474 /* fall through */
1475 case NL80211_IFTYPE_STATION:
1476 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1477 ieee80211_sta_setup_sdata(sdata);
1478 break;
1479 case NL80211_IFTYPE_OCB:
1480 sdata->vif.bss_conf.bssid = bssid_wildcard;
1481 ieee80211_ocb_setup_sdata(sdata);
1482 break;
1483 case NL80211_IFTYPE_ADHOC:
1484 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1485 ieee80211_ibss_setup_sdata(sdata);
1486 break;
1487 case NL80211_IFTYPE_MESH_POINT:
1488 if (ieee80211_vif_is_mesh(&sdata->vif))
1489 ieee80211_mesh_init_sdata(sdata);
1490 break;
1491 case NL80211_IFTYPE_MONITOR:
1492 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1493 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1494 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1495 MONITOR_FLAG_OTHER_BSS;
1496 break;
1497 case NL80211_IFTYPE_WDS:
1498 sdata->vif.bss_conf.bssid = NULL;
1499 break;
1500 case NL80211_IFTYPE_NAN:
1501 idr_init(&sdata->u.nan.function_inst_ids);
1502 spin_lock_init(&sdata->u.nan.func_lock);
1503 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1504 break;
1505 case NL80211_IFTYPE_AP_VLAN:
1506 case NL80211_IFTYPE_P2P_DEVICE:
1507 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1508 break;
1509 case NL80211_IFTYPE_UNSPECIFIED:
1510 case NUM_NL80211_IFTYPES:
1511 BUG();
1512 break;
1513 }
1514
1515 ieee80211_debugfs_add_netdev(sdata);
1516 }
1517
1518 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1519 enum nl80211_iftype type)
1520 {
1521 struct ieee80211_local *local = sdata->local;
1522 int ret, err;
1523 enum nl80211_iftype internal_type = type;
1524 bool p2p = false;
1525
1526 ASSERT_RTNL();
1527
1528 if (!local->ops->change_interface)
1529 return -EBUSY;
1530
1531 switch (sdata->vif.type) {
1532 case NL80211_IFTYPE_AP:
1533 case NL80211_IFTYPE_STATION:
1534 case NL80211_IFTYPE_ADHOC:
1535 case NL80211_IFTYPE_OCB:
1536 /*
1537 * Could maybe also all others here?
1538 * Just not sure how that interacts
1539 * with the RX/config path e.g. for
1540 * mesh.
1541 */
1542 break;
1543 default:
1544 return -EBUSY;
1545 }
1546
1547 switch (type) {
1548 case NL80211_IFTYPE_AP:
1549 case NL80211_IFTYPE_STATION:
1550 case NL80211_IFTYPE_ADHOC:
1551 case NL80211_IFTYPE_OCB:
1552 /*
1553 * Could probably support everything
1554 * but WDS here (WDS do_open can fail
1555 * under memory pressure, which this
1556 * code isn't prepared to handle).
1557 */
1558 break;
1559 case NL80211_IFTYPE_P2P_CLIENT:
1560 p2p = true;
1561 internal_type = NL80211_IFTYPE_STATION;
1562 break;
1563 case NL80211_IFTYPE_P2P_GO:
1564 p2p = true;
1565 internal_type = NL80211_IFTYPE_AP;
1566 break;
1567 default:
1568 return -EBUSY;
1569 }
1570
1571 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1572 if (ret)
1573 return ret;
1574
1575 ieee80211_do_stop(sdata, false);
1576
1577 ieee80211_teardown_sdata(sdata);
1578
1579 ret = drv_change_interface(local, sdata, internal_type, p2p);
1580 if (ret)
1581 type = ieee80211_vif_type_p2p(&sdata->vif);
1582
1583 /*
1584 * Ignore return value here, there's not much we can do since
1585 * the driver changed the interface type internally already.
1586 * The warnings will hopefully make driver authors fix it :-)
1587 */
1588 ieee80211_check_queues(sdata, type);
1589
1590 ieee80211_setup_sdata(sdata, type);
1591
1592 err = ieee80211_do_open(&sdata->wdev, false);
1593 WARN(err, "type change: do_open returned %d", err);
1594
1595 return ret;
1596 }
1597
1598 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1599 enum nl80211_iftype type)
1600 {
1601 int ret;
1602
1603 ASSERT_RTNL();
1604
1605 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1606 return 0;
1607
1608 if (ieee80211_sdata_running(sdata)) {
1609 ret = ieee80211_runtime_change_iftype(sdata, type);
1610 if (ret)
1611 return ret;
1612 } else {
1613 /* Purge and reset type-dependent state. */
1614 ieee80211_teardown_sdata(sdata);
1615 ieee80211_setup_sdata(sdata, type);
1616 }
1617
1618 /* reset some values that shouldn't be kept across type changes */
1619 if (type == NL80211_IFTYPE_STATION)
1620 sdata->u.mgd.use_4addr = false;
1621
1622 return 0;
1623 }
1624
1625 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1626 u8 *perm_addr, enum nl80211_iftype type)
1627 {
1628 struct ieee80211_sub_if_data *sdata;
1629 u64 mask, start, addr, val, inc;
1630 u8 *m;
1631 u8 tmp_addr[ETH_ALEN];
1632 int i;
1633
1634 /* default ... something at least */
1635 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1636
1637 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1638 local->hw.wiphy->n_addresses <= 1)
1639 return;
1640
1641 mutex_lock(&local->iflist_mtx);
1642
1643 switch (type) {
1644 case NL80211_IFTYPE_MONITOR:
1645 /* doesn't matter */
1646 break;
1647 case NL80211_IFTYPE_WDS:
1648 case NL80211_IFTYPE_AP_VLAN:
1649 /* match up with an AP interface */
1650 list_for_each_entry(sdata, &local->interfaces, list) {
1651 if (sdata->vif.type != NL80211_IFTYPE_AP)
1652 continue;
1653 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1654 break;
1655 }
1656 /* keep default if no AP interface present */
1657 break;
1658 case NL80211_IFTYPE_P2P_CLIENT:
1659 case NL80211_IFTYPE_P2P_GO:
1660 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1661 list_for_each_entry(sdata, &local->interfaces, list) {
1662 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1663 continue;
1664 if (!ieee80211_sdata_running(sdata))
1665 continue;
1666 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1667 goto out_unlock;
1668 }
1669 }
1670 /* otherwise fall through */
1671 default:
1672 /* assign a new address if possible -- try n_addresses first */
1673 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1674 bool used = false;
1675
1676 list_for_each_entry(sdata, &local->interfaces, list) {
1677 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1678 sdata->vif.addr)) {
1679 used = true;
1680 break;
1681 }
1682 }
1683
1684 if (!used) {
1685 memcpy(perm_addr,
1686 local->hw.wiphy->addresses[i].addr,
1687 ETH_ALEN);
1688 break;
1689 }
1690 }
1691
1692 /* try mask if available */
1693 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1694 break;
1695
1696 m = local->hw.wiphy->addr_mask;
1697 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1698 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1699 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1700
1701 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1702 /* not a contiguous mask ... not handled now! */
1703 pr_info("not contiguous\n");
1704 break;
1705 }
1706
1707 /*
1708 * Pick address of existing interface in case user changed
1709 * MAC address manually, default to perm_addr.
1710 */
1711 m = local->hw.wiphy->perm_addr;
1712 list_for_each_entry(sdata, &local->interfaces, list) {
1713 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1714 continue;
1715 m = sdata->vif.addr;
1716 break;
1717 }
1718 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1719 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1720 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1721
1722 inc = 1ULL<<__ffs64(mask);
1723 val = (start & mask);
1724 addr = (start & ~mask) | (val & mask);
1725 do {
1726 bool used = false;
1727
1728 tmp_addr[5] = addr >> 0*8;
1729 tmp_addr[4] = addr >> 1*8;
1730 tmp_addr[3] = addr >> 2*8;
1731 tmp_addr[2] = addr >> 3*8;
1732 tmp_addr[1] = addr >> 4*8;
1733 tmp_addr[0] = addr >> 5*8;
1734
1735 val += inc;
1736
1737 list_for_each_entry(sdata, &local->interfaces, list) {
1738 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1739 used = true;
1740 break;
1741 }
1742 }
1743
1744 if (!used) {
1745 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1746 break;
1747 }
1748 addr = (start & ~mask) | (val & mask);
1749 } while (addr != start);
1750
1751 break;
1752 }
1753
1754 out_unlock:
1755 mutex_unlock(&local->iflist_mtx);
1756 }
1757
1758 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1759 unsigned char name_assign_type,
1760 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1761 struct vif_params *params)
1762 {
1763 struct net_device *ndev = NULL;
1764 struct ieee80211_sub_if_data *sdata = NULL;
1765 struct txq_info *txqi;
1766 void (*if_setup)(struct net_device *dev);
1767 int ret, i;
1768 int txqs = 1;
1769
1770 ASSERT_RTNL();
1771
1772 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1773 struct wireless_dev *wdev;
1774
1775 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1776 GFP_KERNEL);
1777 if (!sdata)
1778 return -ENOMEM;
1779 wdev = &sdata->wdev;
1780
1781 sdata->dev = NULL;
1782 strlcpy(sdata->name, name, IFNAMSIZ);
1783 ieee80211_assign_perm_addr(local, wdev->address, type);
1784 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1785 } else {
1786 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1787 sizeof(void *));
1788 int txq_size = 0;
1789
1790 if (local->ops->wake_tx_queue)
1791 txq_size += sizeof(struct txq_info) +
1792 local->hw.txq_data_size;
1793
1794 if (local->ops->wake_tx_queue)
1795 if_setup = ieee80211_if_setup_no_queue;
1796 else
1797 if_setup = ieee80211_if_setup;
1798
1799 if (local->hw.queues >= IEEE80211_NUM_ACS)
1800 txqs = IEEE80211_NUM_ACS;
1801
1802 ndev = alloc_netdev_mqs(size + txq_size,
1803 name, name_assign_type,
1804 if_setup, txqs, 1);
1805 if (!ndev)
1806 return -ENOMEM;
1807 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1808
1809 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1810 if (!ndev->tstats) {
1811 free_netdev(ndev);
1812 return -ENOMEM;
1813 }
1814
1815 ndev->needed_headroom = local->tx_headroom +
1816 4*6 /* four MAC addresses */
1817 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1818 + 6 /* mesh */
1819 + 8 /* rfc1042/bridge tunnel */
1820 - ETH_HLEN /* ethernet hard_header_len */
1821 + IEEE80211_ENCRYPT_HEADROOM;
1822 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1823
1824 ret = dev_alloc_name(ndev, ndev->name);
1825 if (ret < 0) {
1826 ieee80211_if_free(ndev);
1827 return ret;
1828 }
1829
1830 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1831 if (params && is_valid_ether_addr(params->macaddr))
1832 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1833 else
1834 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1835 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1836
1837 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1838 sdata = netdev_priv(ndev);
1839 ndev->ieee80211_ptr = &sdata->wdev;
1840 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1841 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1842
1843 if (txq_size) {
1844 txqi = netdev_priv(ndev) + size;
1845 ieee80211_txq_init(sdata, NULL, txqi, 0);
1846 }
1847
1848 sdata->dev = ndev;
1849 }
1850
1851 /* initialise type-independent data */
1852 sdata->wdev.wiphy = local->hw.wiphy;
1853 sdata->local = local;
1854
1855 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1856 skb_queue_head_init(&sdata->fragments[i].skb_list);
1857
1858 INIT_LIST_HEAD(&sdata->key_list);
1859
1860 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1861 ieee80211_dfs_cac_timer_work);
1862 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1863 ieee80211_delayed_tailroom_dec);
1864
1865 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1866 struct ieee80211_supported_band *sband;
1867 sband = local->hw.wiphy->bands[i];
1868 sdata->rc_rateidx_mask[i] =
1869 sband ? (1 << sband->n_bitrates) - 1 : 0;
1870 if (sband) {
1871 __le16 cap;
1872 u16 *vht_rate_mask;
1873
1874 memcpy(sdata->rc_rateidx_mcs_mask[i],
1875 sband->ht_cap.mcs.rx_mask,
1876 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1877
1878 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1879 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1880 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1881 } else {
1882 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1883 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1884 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1885 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1886 }
1887 }
1888
1889 ieee80211_set_default_queues(sdata);
1890
1891 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1892 sdata->user_power_level = local->user_power_level;
1893
1894 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1895
1896 /* setup type-dependent data */
1897 ieee80211_setup_sdata(sdata, type);
1898
1899 if (ndev) {
1900 if (params) {
1901 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1902 if (type == NL80211_IFTYPE_STATION)
1903 sdata->u.mgd.use_4addr = params->use_4addr;
1904 }
1905
1906 ndev->features |= local->hw.netdev_features;
1907
1908 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1909
1910 /* MTU range: 256 - 2304 */
1911 ndev->min_mtu = 256;
1912 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1913
1914 ret = register_netdevice(ndev);
1915 if (ret) {
1916 ieee80211_if_free(ndev);
1917 return ret;
1918 }
1919 }
1920
1921 mutex_lock(&local->iflist_mtx);
1922 list_add_tail_rcu(&sdata->list, &local->interfaces);
1923 mutex_unlock(&local->iflist_mtx);
1924
1925 if (new_wdev)
1926 *new_wdev = &sdata->wdev;
1927
1928 return 0;
1929 }
1930
1931 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1932 {
1933 ASSERT_RTNL();
1934
1935 mutex_lock(&sdata->local->iflist_mtx);
1936 list_del_rcu(&sdata->list);
1937 mutex_unlock(&sdata->local->iflist_mtx);
1938
1939 synchronize_rcu();
1940
1941 if (sdata->dev) {
1942 unregister_netdevice(sdata->dev);
1943 } else {
1944 cfg80211_unregister_wdev(&sdata->wdev);
1945 ieee80211_teardown_sdata(sdata);
1946 kfree(sdata);
1947 }
1948 }
1949
1950 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1951 {
1952 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1953 return;
1954 ieee80211_do_stop(sdata, true);
1955 }
1956
1957 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1958 {
1959 struct ieee80211_sub_if_data *sdata, *tmp;
1960 LIST_HEAD(unreg_list);
1961 LIST_HEAD(wdev_list);
1962
1963 ASSERT_RTNL();
1964
1965 /* Before destroying the interfaces, make sure they're all stopped so
1966 * that the hardware is stopped. Otherwise, the driver might still be
1967 * iterating the interfaces during the shutdown, e.g. from a worker
1968 * or from RX processing or similar, and if it does so (using atomic
1969 * iteration) while we're manipulating the list, the iteration will
1970 * crash.
1971 *
1972 * After this, the hardware should be stopped and the driver should
1973 * have stopped all of its activities, so that we can do RCU-unaware
1974 * manipulations of the interface list below.
1975 */
1976 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1977
1978 WARN(local->open_count, "%s: open count remains %d\n",
1979 wiphy_name(local->hw.wiphy), local->open_count);
1980
1981 mutex_lock(&local->iflist_mtx);
1982 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1983 list_del(&sdata->list);
1984
1985 if (sdata->dev)
1986 unregister_netdevice_queue(sdata->dev, &unreg_list);
1987 else
1988 list_add(&sdata->list, &wdev_list);
1989 }
1990 mutex_unlock(&local->iflist_mtx);
1991 unregister_netdevice_many(&unreg_list);
1992
1993 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1994 list_del(&sdata->list);
1995 cfg80211_unregister_wdev(&sdata->wdev);
1996 kfree(sdata);
1997 }
1998 }
1999
2000 static int netdev_notify(struct notifier_block *nb,
2001 unsigned long state, void *ptr)
2002 {
2003 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2004 struct ieee80211_sub_if_data *sdata;
2005
2006 if (state != NETDEV_CHANGENAME)
2007 return NOTIFY_DONE;
2008
2009 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2010 return NOTIFY_DONE;
2011
2012 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2013 return NOTIFY_DONE;
2014
2015 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2016 memcpy(sdata->name, dev->name, IFNAMSIZ);
2017 ieee80211_debugfs_rename_netdev(sdata);
2018
2019 return NOTIFY_OK;
2020 }
2021
2022 static struct notifier_block mac80211_netdev_notifier = {
2023 .notifier_call = netdev_notify,
2024 };
2025
2026 int ieee80211_iface_init(void)
2027 {
2028 return register_netdevice_notifier(&mac80211_netdev_notifier);
2029 }
2030
2031 void ieee80211_iface_exit(void)
2032 {
2033 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2034 }
2035
2036 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2037 {
2038 if (sdata->vif.type == NL80211_IFTYPE_AP)
2039 atomic_inc(&sdata->u.ap.num_mcast_sta);
2040 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2041 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2042 }
2043
2044 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2045 {
2046 if (sdata->vif.type == NL80211_IFTYPE_AP)
2047 atomic_dec(&sdata->u.ap.num_mcast_sta);
2048 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2049 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2050 }
Linux with added FPC-III support