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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Interface handling
4 *
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2020 Intel Corporation
12 */
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
21 #include "sta_info.h"
22 #include "debugfs_netdev.h"
23 #include "mesh.h"
24 #include "led.h"
25 #include "driver-ops.h"
26 #include "wme.h"
27 #include "rate.h"
28
29 /**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
45 static void ieee80211_iface_work(struct work_struct *work);
46
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48 {
49 struct ieee80211_chanctx_conf *chanctx_conf;
50 int power;
51
52 rcu_read_lock();
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
54 if (!chanctx_conf) {
55 rcu_read_unlock();
56 return false;
57 }
58
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
60 rcu_read_unlock();
61
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
64
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
67
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
71 return true;
72 }
73
74 return false;
75 }
76
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
78 bool update_bss)
79 {
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
83 }
84
85 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
86 {
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
88 return 0;
89
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
92 }
93
94 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
95 {
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
97 return 0;
98
99 ieee80211_flush_queues(local, NULL, false);
100
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103 }
104
105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
106 bool force_active)
107 {
108 bool working, scanning, active;
109 unsigned int led_trig_start = 0, led_trig_stop = 0;
110
111 lockdep_assert_held(&local->mtx);
112
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
115 local->monitors;
116
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
119
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 else
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127
128 if (active)
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 else
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
138 }
139
140 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 {
142 return __ieee80211_recalc_idle(local, true);
143 }
144
145 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 {
147 u32 change = __ieee80211_recalc_idle(local, false);
148 if (change)
149 ieee80211_hw_config(local, change);
150 }
151
152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
153 bool check_dup)
154 {
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
157 u64 new, mask, tmp;
158 u8 *m;
159 int ret = 0;
160
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 return 0;
163
164 m = addr;
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
168
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
174 if (!check_dup)
175 return ret;
176
177 mutex_lock(&local->iflist_mtx);
178 list_for_each_entry(iter, &local->interfaces, list) {
179 if (iter == sdata)
180 continue;
181
182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
184 continue;
185
186 m = iter->vif.addr;
187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
190
191 if ((new & ~mask) != (tmp & ~mask)) {
192 ret = -EINVAL;
193 break;
194 }
195 }
196 mutex_unlock(&local->iflist_mtx);
197
198 return ret;
199 }
200
201 static int ieee80211_change_mac(struct net_device *dev, void *addr)
202 {
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
204 struct sockaddr *sa = addr;
205 bool check_dup = true;
206 int ret;
207
208 if (ieee80211_sdata_running(sdata))
209 return -EBUSY;
210
211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
213 check_dup = false;
214
215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
216 if (ret)
217 return ret;
218
219 ret = eth_mac_addr(dev, sa);
220
221 if (ret == 0)
222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
223
224 return ret;
225 }
226
227 static inline int identical_mac_addr_allowed(int type1, int type2)
228 {
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
234 (type1 == NL80211_IFTYPE_AP_VLAN &&
235 (type2 == NL80211_IFTYPE_AP ||
236 type2 == NL80211_IFTYPE_AP_VLAN));
237 }
238
239 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
240 enum nl80211_iftype iftype)
241 {
242 struct ieee80211_local *local = sdata->local;
243 struct ieee80211_sub_if_data *nsdata;
244 int ret;
245
246 ASSERT_RTNL();
247
248 /* we hold the RTNL here so can safely walk the list */
249 list_for_each_entry(nsdata, &local->interfaces, list) {
250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
251 /*
252 * Only OCB and monitor mode may coexist
253 */
254 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
255 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
256 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
257 nsdata->vif.type == NL80211_IFTYPE_OCB))
258 return -EBUSY;
259
260 /*
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
264 *
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
269 */
270 if (iftype == NL80211_IFTYPE_ADHOC &&
271 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
272 return -EBUSY;
273 /*
274 * will not add another interface while any channel
275 * switch is active.
276 */
277 if (nsdata->vif.csa_active)
278 return -EBUSY;
279
280 /*
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
283 */
284 if (!ether_addr_equal(sdata->vif.addr,
285 nsdata->vif.addr))
286 continue;
287
288 /*
289 * check whether it may have the same address
290 */
291 if (!identical_mac_addr_allowed(iftype,
292 nsdata->vif.type))
293 return -ENOTUNIQ;
294
295 /*
296 * can only add VLANs to enabled APs
297 */
298 if (iftype == NL80211_IFTYPE_AP_VLAN &&
299 nsdata->vif.type == NL80211_IFTYPE_AP)
300 sdata->bss = &nsdata->u.ap;
301 }
302 }
303
304 mutex_lock(&local->chanctx_mtx);
305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
306 mutex_unlock(&local->chanctx_mtx);
307 return ret;
308 }
309
310 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
311 enum nl80211_iftype iftype)
312 {
313 int n_queues = sdata->local->hw.queues;
314 int i;
315
316 if (iftype == NL80211_IFTYPE_NAN)
317 return 0;
318
319 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
320 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
322 IEEE80211_INVAL_HW_QUEUE))
323 return -EINVAL;
324 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
325 n_queues))
326 return -EINVAL;
327 }
328 }
329
330 if ((iftype != NL80211_IFTYPE_AP &&
331 iftype != NL80211_IFTYPE_P2P_GO &&
332 iftype != NL80211_IFTYPE_MESH_POINT) ||
333 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
334 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
335 return 0;
336 }
337
338 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
339 return -EINVAL;
340
341 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
342 return -EINVAL;
343
344 return 0;
345 }
346
347 static int ieee80211_open(struct net_device *dev)
348 {
349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
350 int err;
351
352 /* fail early if user set an invalid address */
353 if (!is_valid_ether_addr(dev->dev_addr))
354 return -EADDRNOTAVAIL;
355
356 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
357 if (err)
358 return err;
359
360 return ieee80211_do_open(&sdata->wdev, true);
361 }
362
363 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
364 bool going_down)
365 {
366 struct ieee80211_local *local = sdata->local;
367 unsigned long flags;
368 struct sk_buff *skb, *tmp;
369 u32 hw_reconf_flags = 0;
370 int i, flushed;
371 struct ps_data *ps;
372 struct cfg80211_chan_def chandef;
373 bool cancel_scan;
374 struct cfg80211_nan_func *func;
375
376 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
377
378 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
379 if (cancel_scan)
380 ieee80211_scan_cancel(local);
381
382 /*
383 * Stop TX on this interface first.
384 */
385 if (sdata->dev)
386 netif_tx_stop_all_queues(sdata->dev);
387
388 ieee80211_roc_purge(local, sdata);
389
390 switch (sdata->vif.type) {
391 case NL80211_IFTYPE_STATION:
392 ieee80211_mgd_stop(sdata);
393 break;
394 case NL80211_IFTYPE_ADHOC:
395 ieee80211_ibss_stop(sdata);
396 break;
397 case NL80211_IFTYPE_MONITOR:
398 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
399 break;
400 list_del_rcu(&sdata->u.mntr.list);
401 break;
402 default:
403 break;
404 }
405
406 /*
407 * Remove all stations associated with this interface.
408 *
409 * This must be done before calling ops->remove_interface()
410 * because otherwise we can later invoke ops->sta_notify()
411 * whenever the STAs are removed, and that invalidates driver
412 * assumptions about always getting a vif pointer that is valid
413 * (because if we remove a STA after ops->remove_interface()
414 * the driver will have removed the vif info already!)
415 *
416 * For AP_VLANs stations may exist since there's nothing else that
417 * would have removed them, but in other modes there shouldn't
418 * be any stations.
419 */
420 flushed = sta_info_flush(sdata);
421 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
422
423 /* don't count this interface for allmulti while it is down */
424 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
425 atomic_dec(&local->iff_allmultis);
426
427 if (sdata->vif.type == NL80211_IFTYPE_AP) {
428 local->fif_pspoll--;
429 local->fif_probe_req--;
430 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
431 local->fif_probe_req--;
432 }
433
434 if (sdata->dev) {
435 netif_addr_lock_bh(sdata->dev);
436 spin_lock_bh(&local->filter_lock);
437 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
438 sdata->dev->addr_len);
439 spin_unlock_bh(&local->filter_lock);
440 netif_addr_unlock_bh(sdata->dev);
441 }
442
443 del_timer_sync(&local->dynamic_ps_timer);
444 cancel_work_sync(&local->dynamic_ps_enable_work);
445
446 cancel_work_sync(&sdata->recalc_smps);
447 sdata_lock(sdata);
448 mutex_lock(&local->mtx);
449 sdata->vif.csa_active = false;
450 if (sdata->vif.type == NL80211_IFTYPE_STATION)
451 sdata->u.mgd.csa_waiting_bcn = false;
452 if (sdata->csa_block_tx) {
453 ieee80211_wake_vif_queues(local, sdata,
454 IEEE80211_QUEUE_STOP_REASON_CSA);
455 sdata->csa_block_tx = false;
456 }
457 mutex_unlock(&local->mtx);
458 sdata_unlock(sdata);
459
460 cancel_work_sync(&sdata->csa_finalize_work);
461
462 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
463
464 if (sdata->wdev.cac_started) {
465 chandef = sdata->vif.bss_conf.chandef;
466 WARN_ON(local->suspended);
467 mutex_lock(&local->mtx);
468 ieee80211_vif_release_channel(sdata);
469 mutex_unlock(&local->mtx);
470 cfg80211_cac_event(sdata->dev, &chandef,
471 NL80211_RADAR_CAC_ABORTED,
472 GFP_KERNEL);
473 }
474
475 /* APs need special treatment */
476 if (sdata->vif.type == NL80211_IFTYPE_AP) {
477 struct ieee80211_sub_if_data *vlan, *tmpsdata;
478
479 /* down all dependent devices, that is VLANs */
480 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
481 u.vlan.list)
482 dev_close(vlan->dev);
483 WARN_ON(!list_empty(&sdata->u.ap.vlans));
484 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
485 /* remove all packets in parent bc_buf pointing to this dev */
486 ps = &sdata->bss->ps;
487
488 spin_lock_irqsave(&ps->bc_buf.lock, flags);
489 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
490 if (skb->dev == sdata->dev) {
491 __skb_unlink(skb, &ps->bc_buf);
492 local->total_ps_buffered--;
493 ieee80211_free_txskb(&local->hw, skb);
494 }
495 }
496 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
497 }
498
499 if (going_down)
500 local->open_count--;
501
502 switch (sdata->vif.type) {
503 case NL80211_IFTYPE_AP_VLAN:
504 mutex_lock(&local->mtx);
505 list_del(&sdata->u.vlan.list);
506 mutex_unlock(&local->mtx);
507 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
508 /* see comment in the default case below */
509 ieee80211_free_keys(sdata, true);
510 /* no need to tell driver */
511 break;
512 case NL80211_IFTYPE_MONITOR:
513 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
514 local->cooked_mntrs--;
515 break;
516 }
517
518 local->monitors--;
519 if (local->monitors == 0) {
520 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
522 }
523
524 ieee80211_adjust_monitor_flags(sdata, -1);
525 break;
526 case NL80211_IFTYPE_NAN:
527 /* clean all the functions */
528 spin_lock_bh(&sdata->u.nan.func_lock);
529
530 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
531 idr_remove(&sdata->u.nan.function_inst_ids, i);
532 cfg80211_free_nan_func(func);
533 }
534 idr_destroy(&sdata->u.nan.function_inst_ids);
535
536 spin_unlock_bh(&sdata->u.nan.func_lock);
537 break;
538 case NL80211_IFTYPE_P2P_DEVICE:
539 /* relies on synchronize_rcu() below */
540 RCU_INIT_POINTER(local->p2p_sdata, NULL);
541 fallthrough;
542 default:
543 cancel_work_sync(&sdata->work);
544 /*
545 * When we get here, the interface is marked down.
546 * Free the remaining keys, if there are any
547 * (which can happen in AP mode if userspace sets
548 * keys before the interface is operating)
549 *
550 * Force the key freeing to always synchronize_net()
551 * to wait for the RX path in case it is using this
552 * interface enqueuing frames at this very time on
553 * another CPU.
554 */
555 ieee80211_free_keys(sdata, true);
556 skb_queue_purge(&sdata->skb_queue);
557 }
558
559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
561 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
562 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
563 if (info->control.vif == &sdata->vif) {
564 __skb_unlink(skb, &local->pending[i]);
565 ieee80211_free_txskb(&local->hw, skb);
566 }
567 }
568 }
569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
570
571 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
572 ieee80211_txq_remove_vlan(local, sdata);
573
574 sdata->bss = NULL;
575
576 if (local->open_count == 0)
577 ieee80211_clear_tx_pending(local);
578
579 sdata->vif.bss_conf.beacon_int = 0;
580
581 /*
582 * If the interface goes down while suspended, presumably because
583 * the device was unplugged and that happens before our resume,
584 * then the driver is already unconfigured and the remainder of
585 * this function isn't needed.
586 * XXX: what about WoWLAN? If the device has software state, e.g.
587 * memory allocated, it might expect teardown commands from
588 * mac80211 here?
589 */
590 if (local->suspended) {
591 WARN_ON(local->wowlan);
592 WARN_ON(rtnl_dereference(local->monitor_sdata));
593 return;
594 }
595
596 switch (sdata->vif.type) {
597 case NL80211_IFTYPE_AP_VLAN:
598 break;
599 case NL80211_IFTYPE_MONITOR:
600 if (local->monitors == 0)
601 ieee80211_del_virtual_monitor(local);
602
603 mutex_lock(&local->mtx);
604 ieee80211_recalc_idle(local);
605 mutex_unlock(&local->mtx);
606
607 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
608 break;
609
610 fallthrough;
611 default:
612 if (going_down)
613 drv_remove_interface(local, sdata);
614 }
615
616 ieee80211_recalc_ps(local);
617
618 if (cancel_scan)
619 flush_delayed_work(&local->scan_work);
620
621 if (local->open_count == 0) {
622 ieee80211_stop_device(local);
623
624 /* no reconfiguring after stop! */
625 return;
626 }
627
628 /* do after stop to avoid reconfiguring when we stop anyway */
629 ieee80211_configure_filter(local);
630 ieee80211_hw_config(local, hw_reconf_flags);
631
632 if (local->monitors == local->open_count)
633 ieee80211_add_virtual_monitor(local);
634 }
635
636 static int ieee80211_stop(struct net_device *dev)
637 {
638 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
639
640 ieee80211_do_stop(sdata, true);
641
642 return 0;
643 }
644
645 static void ieee80211_set_multicast_list(struct net_device *dev)
646 {
647 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
648 struct ieee80211_local *local = sdata->local;
649 int allmulti, sdata_allmulti;
650
651 allmulti = !!(dev->flags & IFF_ALLMULTI);
652 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
653
654 if (allmulti != sdata_allmulti) {
655 if (dev->flags & IFF_ALLMULTI)
656 atomic_inc(&local->iff_allmultis);
657 else
658 atomic_dec(&local->iff_allmultis);
659 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
660 }
661
662 spin_lock_bh(&local->filter_lock);
663 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
664 spin_unlock_bh(&local->filter_lock);
665 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
666 }
667
668 /*
669 * Called when the netdev is removed or, by the code below, before
670 * the interface type changes.
671 */
672 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
673 {
674 int i;
675
676 /* free extra data */
677 ieee80211_free_keys(sdata, false);
678
679 ieee80211_debugfs_remove_netdev(sdata);
680
681 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
682 __skb_queue_purge(&sdata->fragments[i].skb_list);
683 sdata->fragment_next = 0;
684
685 if (ieee80211_vif_is_mesh(&sdata->vif))
686 ieee80211_mesh_teardown_sdata(sdata);
687 }
688
689 static void ieee80211_uninit(struct net_device *dev)
690 {
691 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
692 }
693
694 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
695 struct sk_buff *skb,
696 struct net_device *sb_dev)
697 {
698 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
699 }
700
701 static void
702 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
703 {
704 dev_fetch_sw_netstats(stats, dev->tstats);
705 }
706
707 static const struct net_device_ops ieee80211_dataif_ops = {
708 .ndo_open = ieee80211_open,
709 .ndo_stop = ieee80211_stop,
710 .ndo_uninit = ieee80211_uninit,
711 .ndo_start_xmit = ieee80211_subif_start_xmit,
712 .ndo_set_rx_mode = ieee80211_set_multicast_list,
713 .ndo_set_mac_address = ieee80211_change_mac,
714 .ndo_select_queue = ieee80211_netdev_select_queue,
715 .ndo_get_stats64 = ieee80211_get_stats64,
716 };
717
718 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
719 struct sk_buff *skb,
720 struct net_device *sb_dev)
721 {
722 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
723 struct ieee80211_local *local = sdata->local;
724 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
725 struct ieee80211_hdr *hdr;
726 int len_rthdr;
727
728 if (local->hw.queues < IEEE80211_NUM_ACS)
729 return 0;
730
731 /* reset flags and info before parsing radiotap header */
732 memset(info, 0, sizeof(*info));
733
734 if (!ieee80211_parse_tx_radiotap(skb, dev))
735 return 0; /* doesn't matter, frame will be dropped */
736
737 len_rthdr = ieee80211_get_radiotap_len(skb->data);
738 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
739 if (skb->len < len_rthdr + 2 ||
740 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
741 return 0; /* doesn't matter, frame will be dropped */
742
743 return ieee80211_select_queue_80211(sdata, skb, hdr);
744 }
745
746 static const struct net_device_ops ieee80211_monitorif_ops = {
747 .ndo_open = ieee80211_open,
748 .ndo_stop = ieee80211_stop,
749 .ndo_uninit = ieee80211_uninit,
750 .ndo_start_xmit = ieee80211_monitor_start_xmit,
751 .ndo_set_rx_mode = ieee80211_set_multicast_list,
752 .ndo_set_mac_address = ieee80211_change_mac,
753 .ndo_select_queue = ieee80211_monitor_select_queue,
754 .ndo_get_stats64 = ieee80211_get_stats64,
755 };
756
757 static const struct net_device_ops ieee80211_dataif_8023_ops = {
758 .ndo_open = ieee80211_open,
759 .ndo_stop = ieee80211_stop,
760 .ndo_uninit = ieee80211_uninit,
761 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
762 .ndo_set_rx_mode = ieee80211_set_multicast_list,
763 .ndo_set_mac_address = ieee80211_change_mac,
764 .ndo_select_queue = ieee80211_netdev_select_queue,
765 .ndo_get_stats64 = ieee80211_get_stats64,
766 };
767
768 static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
769 {
770 switch (iftype) {
771 /* P2P GO and client are mapped to AP/STATION types */
772 case NL80211_IFTYPE_AP:
773 case NL80211_IFTYPE_STATION:
774 return true;
775 default:
776 return false;
777 }
778 }
779
780 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
781 {
782 struct ieee80211_local *local = sdata->local;
783 u32 flags;
784
785 flags = sdata->vif.offload_flags;
786
787 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
788 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
789 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
790
791 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
792 local->hw.wiphy->frag_threshold != (u32)-1)
793 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
794
795 if (local->monitors)
796 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
797 } else {
798 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
799 }
800
801 if (sdata->vif.offload_flags == flags)
802 return false;
803
804 sdata->vif.offload_flags = flags;
805 return true;
806 }
807
808 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
809 {
810 struct ieee80211_local *local = sdata->local;
811 struct ieee80211_sub_if_data *bss = sdata;
812 bool enabled;
813
814 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
815 if (!sdata->bss)
816 return;
817
818 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
819 }
820
821 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
822 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
823 return;
824
825 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
826 if (sdata->wdev.use_4addr &&
827 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
828 enabled = false;
829
830 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
831 &ieee80211_dataif_ops;
832 }
833
834 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
835 {
836 struct ieee80211_local *local = sdata->local;
837 struct ieee80211_sub_if_data *vsdata;
838
839 if (ieee80211_set_sdata_offload_flags(sdata)) {
840 drv_update_vif_offload(local, sdata);
841 ieee80211_set_vif_encap_ops(sdata);
842 }
843
844 list_for_each_entry(vsdata, &local->interfaces, list) {
845 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
846 vsdata->bss != &sdata->u.ap)
847 continue;
848
849 ieee80211_set_vif_encap_ops(vsdata);
850 }
851 }
852
853 void ieee80211_recalc_offload(struct ieee80211_local *local)
854 {
855 struct ieee80211_sub_if_data *sdata;
856
857 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
858 return;
859
860 mutex_lock(&local->iflist_mtx);
861
862 list_for_each_entry(sdata, &local->interfaces, list) {
863 if (!ieee80211_sdata_running(sdata))
864 continue;
865
866 ieee80211_recalc_sdata_offload(sdata);
867 }
868
869 mutex_unlock(&local->iflist_mtx);
870 }
871
872 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
873 const int offset)
874 {
875 struct ieee80211_local *local = sdata->local;
876 u32 flags = sdata->u.mntr.flags;
877
878 #define ADJUST(_f, _s) do { \
879 if (flags & MONITOR_FLAG_##_f) \
880 local->fif_##_s += offset; \
881 } while (0)
882
883 ADJUST(FCSFAIL, fcsfail);
884 ADJUST(PLCPFAIL, plcpfail);
885 ADJUST(CONTROL, control);
886 ADJUST(CONTROL, pspoll);
887 ADJUST(OTHER_BSS, other_bss);
888
889 #undef ADJUST
890 }
891
892 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
893 {
894 struct ieee80211_local *local = sdata->local;
895 int i;
896
897 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
898 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
899 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
900 else if (local->hw.queues >= IEEE80211_NUM_ACS)
901 sdata->vif.hw_queue[i] = i;
902 else
903 sdata->vif.hw_queue[i] = 0;
904 }
905 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
906 }
907
908 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
909 {
910 struct ieee80211_sub_if_data *sdata;
911 int ret;
912
913 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
914 return 0;
915
916 ASSERT_RTNL();
917
918 if (local->monitor_sdata)
919 return 0;
920
921 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
922 if (!sdata)
923 return -ENOMEM;
924
925 /* set up data */
926 sdata->local = local;
927 sdata->vif.type = NL80211_IFTYPE_MONITOR;
928 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
929 wiphy_name(local->hw.wiphy));
930 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
931
932 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
933
934 ieee80211_set_default_queues(sdata);
935
936 ret = drv_add_interface(local, sdata);
937 if (WARN_ON(ret)) {
938 /* ok .. stupid driver, it asked for this! */
939 kfree(sdata);
940 return ret;
941 }
942
943 set_bit(SDATA_STATE_RUNNING, &sdata->state);
944
945 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
946 if (ret) {
947 kfree(sdata);
948 return ret;
949 }
950
951 mutex_lock(&local->iflist_mtx);
952 rcu_assign_pointer(local->monitor_sdata, sdata);
953 mutex_unlock(&local->iflist_mtx);
954
955 mutex_lock(&local->mtx);
956 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
957 IEEE80211_CHANCTX_EXCLUSIVE);
958 mutex_unlock(&local->mtx);
959 if (ret) {
960 mutex_lock(&local->iflist_mtx);
961 RCU_INIT_POINTER(local->monitor_sdata, NULL);
962 mutex_unlock(&local->iflist_mtx);
963 synchronize_net();
964 drv_remove_interface(local, sdata);
965 kfree(sdata);
966 return ret;
967 }
968
969 skb_queue_head_init(&sdata->skb_queue);
970 INIT_WORK(&sdata->work, ieee80211_iface_work);
971
972 return 0;
973 }
974
975 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
976 {
977 struct ieee80211_sub_if_data *sdata;
978
979 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
980 return;
981
982 ASSERT_RTNL();
983
984 mutex_lock(&local->iflist_mtx);
985
986 sdata = rcu_dereference_protected(local->monitor_sdata,
987 lockdep_is_held(&local->iflist_mtx));
988 if (!sdata) {
989 mutex_unlock(&local->iflist_mtx);
990 return;
991 }
992
993 RCU_INIT_POINTER(local->monitor_sdata, NULL);
994 mutex_unlock(&local->iflist_mtx);
995
996 synchronize_net();
997
998 mutex_lock(&local->mtx);
999 ieee80211_vif_release_channel(sdata);
1000 mutex_unlock(&local->mtx);
1001
1002 drv_remove_interface(local, sdata);
1003
1004 kfree(sdata);
1005 }
1006
1007 /*
1008 * NOTE: Be very careful when changing this function, it must NOT return
1009 * an error on interface type changes that have been pre-checked, so most
1010 * checks should be in ieee80211_check_concurrent_iface.
1011 */
1012 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1013 {
1014 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1015 struct net_device *dev = wdev->netdev;
1016 struct ieee80211_local *local = sdata->local;
1017 u32 changed = 0;
1018 int res;
1019 u32 hw_reconf_flags = 0;
1020
1021 switch (sdata->vif.type) {
1022 case NL80211_IFTYPE_AP_VLAN: {
1023 struct ieee80211_sub_if_data *master;
1024
1025 if (!sdata->bss)
1026 return -ENOLINK;
1027
1028 mutex_lock(&local->mtx);
1029 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1030 mutex_unlock(&local->mtx);
1031
1032 master = container_of(sdata->bss,
1033 struct ieee80211_sub_if_data, u.ap);
1034 sdata->control_port_protocol =
1035 master->control_port_protocol;
1036 sdata->control_port_no_encrypt =
1037 master->control_port_no_encrypt;
1038 sdata->control_port_over_nl80211 =
1039 master->control_port_over_nl80211;
1040 sdata->control_port_no_preauth =
1041 master->control_port_no_preauth;
1042 sdata->vif.cab_queue = master->vif.cab_queue;
1043 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1044 sizeof(sdata->vif.hw_queue));
1045 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1046
1047 mutex_lock(&local->key_mtx);
1048 sdata->crypto_tx_tailroom_needed_cnt +=
1049 master->crypto_tx_tailroom_needed_cnt;
1050 mutex_unlock(&local->key_mtx);
1051
1052 break;
1053 }
1054 case NL80211_IFTYPE_AP:
1055 sdata->bss = &sdata->u.ap;
1056 break;
1057 case NL80211_IFTYPE_MESH_POINT:
1058 case NL80211_IFTYPE_STATION:
1059 case NL80211_IFTYPE_MONITOR:
1060 case NL80211_IFTYPE_ADHOC:
1061 case NL80211_IFTYPE_P2P_DEVICE:
1062 case NL80211_IFTYPE_OCB:
1063 case NL80211_IFTYPE_NAN:
1064 /* no special treatment */
1065 break;
1066 case NL80211_IFTYPE_UNSPECIFIED:
1067 case NUM_NL80211_IFTYPES:
1068 case NL80211_IFTYPE_P2P_CLIENT:
1069 case NL80211_IFTYPE_P2P_GO:
1070 case NL80211_IFTYPE_WDS:
1071 /* cannot happen */
1072 WARN_ON(1);
1073 break;
1074 }
1075
1076 if (local->open_count == 0) {
1077 res = drv_start(local);
1078 if (res)
1079 goto err_del_bss;
1080 /* we're brought up, everything changes */
1081 hw_reconf_flags = ~0;
1082 ieee80211_led_radio(local, true);
1083 ieee80211_mod_tpt_led_trig(local,
1084 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1085 }
1086
1087 /*
1088 * Copy the hopefully now-present MAC address to
1089 * this interface, if it has the special null one.
1090 */
1091 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1092 memcpy(dev->dev_addr,
1093 local->hw.wiphy->perm_addr,
1094 ETH_ALEN);
1095 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1096
1097 if (!is_valid_ether_addr(dev->dev_addr)) {
1098 res = -EADDRNOTAVAIL;
1099 goto err_stop;
1100 }
1101 }
1102
1103 switch (sdata->vif.type) {
1104 case NL80211_IFTYPE_AP_VLAN:
1105 /* no need to tell driver, but set carrier and chanctx */
1106 if (rtnl_dereference(sdata->bss->beacon)) {
1107 ieee80211_vif_vlan_copy_chanctx(sdata);
1108 netif_carrier_on(dev);
1109 ieee80211_set_vif_encap_ops(sdata);
1110 } else {
1111 netif_carrier_off(dev);
1112 }
1113 break;
1114 case NL80211_IFTYPE_MONITOR:
1115 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1116 local->cooked_mntrs++;
1117 break;
1118 }
1119
1120 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1121 res = drv_add_interface(local, sdata);
1122 if (res)
1123 goto err_stop;
1124 } else if (local->monitors == 0 && local->open_count == 0) {
1125 res = ieee80211_add_virtual_monitor(local);
1126 if (res)
1127 goto err_stop;
1128 }
1129
1130 /* must be before the call to ieee80211_configure_filter */
1131 local->monitors++;
1132 if (local->monitors == 1) {
1133 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1134 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1135 }
1136
1137 ieee80211_adjust_monitor_flags(sdata, 1);
1138 ieee80211_configure_filter(local);
1139 ieee80211_recalc_offload(local);
1140 mutex_lock(&local->mtx);
1141 ieee80211_recalc_idle(local);
1142 mutex_unlock(&local->mtx);
1143
1144 netif_carrier_on(dev);
1145 break;
1146 default:
1147 if (coming_up) {
1148 ieee80211_del_virtual_monitor(local);
1149 ieee80211_set_sdata_offload_flags(sdata);
1150
1151 res = drv_add_interface(local, sdata);
1152 if (res)
1153 goto err_stop;
1154
1155 ieee80211_set_vif_encap_ops(sdata);
1156 res = ieee80211_check_queues(sdata,
1157 ieee80211_vif_type_p2p(&sdata->vif));
1158 if (res)
1159 goto err_del_interface;
1160 }
1161
1162 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1163 local->fif_pspoll++;
1164 local->fif_probe_req++;
1165
1166 ieee80211_configure_filter(local);
1167 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1168 local->fif_probe_req++;
1169 }
1170
1171 if (sdata->vif.probe_req_reg)
1172 drv_config_iface_filter(local, sdata,
1173 FIF_PROBE_REQ,
1174 FIF_PROBE_REQ);
1175
1176 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1177 sdata->vif.type != NL80211_IFTYPE_NAN)
1178 changed |= ieee80211_reset_erp_info(sdata);
1179 ieee80211_bss_info_change_notify(sdata, changed);
1180
1181 switch (sdata->vif.type) {
1182 case NL80211_IFTYPE_STATION:
1183 case NL80211_IFTYPE_ADHOC:
1184 case NL80211_IFTYPE_AP:
1185 case NL80211_IFTYPE_MESH_POINT:
1186 case NL80211_IFTYPE_OCB:
1187 netif_carrier_off(dev);
1188 break;
1189 case NL80211_IFTYPE_P2P_DEVICE:
1190 case NL80211_IFTYPE_NAN:
1191 break;
1192 default:
1193 /* not reached */
1194 WARN_ON(1);
1195 }
1196
1197 /*
1198 * Set default queue parameters so drivers don't
1199 * need to initialise the hardware if the hardware
1200 * doesn't start up with sane defaults.
1201 * Enable QoS for anything but station interfaces.
1202 */
1203 ieee80211_set_wmm_default(sdata, true,
1204 sdata->vif.type != NL80211_IFTYPE_STATION);
1205 }
1206
1207 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1208
1209 switch (sdata->vif.type) {
1210 case NL80211_IFTYPE_P2P_DEVICE:
1211 rcu_assign_pointer(local->p2p_sdata, sdata);
1212 break;
1213 case NL80211_IFTYPE_MONITOR:
1214 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1215 break;
1216 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1217 break;
1218 default:
1219 break;
1220 }
1221
1222 /*
1223 * set_multicast_list will be invoked by the networking core
1224 * which will check whether any increments here were done in
1225 * error and sync them down to the hardware as filter flags.
1226 */
1227 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1228 atomic_inc(&local->iff_allmultis);
1229
1230 if (coming_up)
1231 local->open_count++;
1232
1233 if (hw_reconf_flags)
1234 ieee80211_hw_config(local, hw_reconf_flags);
1235
1236 ieee80211_recalc_ps(local);
1237
1238 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1239 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1240 local->ops->wake_tx_queue) {
1241 /* XXX: for AP_VLAN, actually track AP queues */
1242 if (dev)
1243 netif_tx_start_all_queues(dev);
1244 } else if (dev) {
1245 unsigned long flags;
1246 int n_acs = IEEE80211_NUM_ACS;
1247 int ac;
1248
1249 if (local->hw.queues < IEEE80211_NUM_ACS)
1250 n_acs = 1;
1251
1252 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1253 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1254 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1255 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1256 for (ac = 0; ac < n_acs; ac++) {
1257 int ac_queue = sdata->vif.hw_queue[ac];
1258
1259 if (local->queue_stop_reasons[ac_queue] == 0 &&
1260 skb_queue_empty(&local->pending[ac_queue]))
1261 netif_start_subqueue(dev, ac);
1262 }
1263 }
1264 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1265 }
1266
1267 return 0;
1268 err_del_interface:
1269 drv_remove_interface(local, sdata);
1270 err_stop:
1271 if (!local->open_count)
1272 drv_stop(local);
1273 err_del_bss:
1274 sdata->bss = NULL;
1275 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1276 mutex_lock(&local->mtx);
1277 list_del(&sdata->u.vlan.list);
1278 mutex_unlock(&local->mtx);
1279 }
1280 /* might already be clear but that doesn't matter */
1281 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1282 return res;
1283 }
1284
1285 static void ieee80211_if_free(struct net_device *dev)
1286 {
1287 free_percpu(dev->tstats);
1288 }
1289
1290 static void ieee80211_if_setup(struct net_device *dev)
1291 {
1292 ether_setup(dev);
1293 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1294 dev->netdev_ops = &ieee80211_dataif_ops;
1295 dev->needs_free_netdev = true;
1296 dev->priv_destructor = ieee80211_if_free;
1297 }
1298
1299 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1300 {
1301 ieee80211_if_setup(dev);
1302 dev->priv_flags |= IFF_NO_QUEUE;
1303 }
1304
1305 static void ieee80211_iface_work(struct work_struct *work)
1306 {
1307 struct ieee80211_sub_if_data *sdata =
1308 container_of(work, struct ieee80211_sub_if_data, work);
1309 struct ieee80211_local *local = sdata->local;
1310 struct sk_buff *skb;
1311 struct sta_info *sta;
1312
1313 if (!ieee80211_sdata_running(sdata))
1314 return;
1315
1316 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1317 return;
1318
1319 if (!ieee80211_can_run_worker(local))
1320 return;
1321
1322 /* first process frames */
1323 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1324 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1325
1326 kcov_remote_start_common(skb_get_kcov_handle(skb));
1327 if (ieee80211_is_action(mgmt->frame_control) &&
1328 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1329 int len = skb->len;
1330
1331 mutex_lock(&local->sta_mtx);
1332 sta = sta_info_get_bss(sdata, mgmt->sa);
1333 if (sta) {
1334 switch (mgmt->u.action.u.addba_req.action_code) {
1335 case WLAN_ACTION_ADDBA_REQ:
1336 ieee80211_process_addba_request(
1337 local, sta, mgmt, len);
1338 break;
1339 case WLAN_ACTION_ADDBA_RESP:
1340 ieee80211_process_addba_resp(local, sta,
1341 mgmt, len);
1342 break;
1343 case WLAN_ACTION_DELBA:
1344 ieee80211_process_delba(sdata, sta,
1345 mgmt, len);
1346 break;
1347 default:
1348 WARN_ON(1);
1349 break;
1350 }
1351 }
1352 mutex_unlock(&local->sta_mtx);
1353 } else if (ieee80211_is_action(mgmt->frame_control) &&
1354 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1355 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1356 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1357 struct ieee80211_rx_status *status;
1358 enum nl80211_band band;
1359 u8 opmode;
1360
1361 status = IEEE80211_SKB_RXCB(skb);
1362 band = status->band;
1363 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1364
1365 mutex_lock(&local->sta_mtx);
1366 sta = sta_info_get_bss(sdata, mgmt->sa);
1367
1368 if (sta)
1369 ieee80211_vht_handle_opmode(sdata, sta,
1370 opmode,
1371 band);
1372
1373 mutex_unlock(&local->sta_mtx);
1374 break;
1375 }
1376 case WLAN_VHT_ACTION_GROUPID_MGMT:
1377 ieee80211_process_mu_groups(sdata, mgmt);
1378 break;
1379 default:
1380 WARN_ON(1);
1381 break;
1382 }
1383 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1384 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1385 ieee80211_sta_rx_queued_ext(sdata, skb);
1386 else
1387 WARN_ON(1);
1388 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1389 struct ieee80211_hdr *hdr = (void *)mgmt;
1390 /*
1391 * So the frame isn't mgmt, but frame_control
1392 * is at the right place anyway, of course, so
1393 * the if statement is correct.
1394 *
1395 * Warn if we have other data frame types here,
1396 * they must not get here.
1397 */
1398 WARN_ON(hdr->frame_control &
1399 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1400 WARN_ON(!(hdr->seq_ctrl &
1401 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1402 /*
1403 * This was a fragment of a frame, received while
1404 * a block-ack session was active. That cannot be
1405 * right, so terminate the session.
1406 */
1407 mutex_lock(&local->sta_mtx);
1408 sta = sta_info_get_bss(sdata, mgmt->sa);
1409 if (sta) {
1410 u16 tid = ieee80211_get_tid(hdr);
1411
1412 __ieee80211_stop_rx_ba_session(
1413 sta, tid, WLAN_BACK_RECIPIENT,
1414 WLAN_REASON_QSTA_REQUIRE_SETUP,
1415 true);
1416 }
1417 mutex_unlock(&local->sta_mtx);
1418 } else switch (sdata->vif.type) {
1419 case NL80211_IFTYPE_STATION:
1420 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1421 break;
1422 case NL80211_IFTYPE_ADHOC:
1423 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1424 break;
1425 case NL80211_IFTYPE_MESH_POINT:
1426 if (!ieee80211_vif_is_mesh(&sdata->vif))
1427 break;
1428 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1429 break;
1430 default:
1431 WARN(1, "frame for unexpected interface type");
1432 break;
1433 }
1434
1435 kfree_skb(skb);
1436 kcov_remote_stop();
1437 }
1438
1439 /* then other type-dependent work */
1440 switch (sdata->vif.type) {
1441 case NL80211_IFTYPE_STATION:
1442 ieee80211_sta_work(sdata);
1443 break;
1444 case NL80211_IFTYPE_ADHOC:
1445 ieee80211_ibss_work(sdata);
1446 break;
1447 case NL80211_IFTYPE_MESH_POINT:
1448 if (!ieee80211_vif_is_mesh(&sdata->vif))
1449 break;
1450 ieee80211_mesh_work(sdata);
1451 break;
1452 case NL80211_IFTYPE_OCB:
1453 ieee80211_ocb_work(sdata);
1454 break;
1455 default:
1456 break;
1457 }
1458 }
1459
1460 static void ieee80211_recalc_smps_work(struct work_struct *work)
1461 {
1462 struct ieee80211_sub_if_data *sdata =
1463 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1464
1465 ieee80211_recalc_smps(sdata);
1466 }
1467
1468 /*
1469 * Helper function to initialise an interface to a specific type.
1470 */
1471 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1472 enum nl80211_iftype type)
1473 {
1474 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1475 0xff, 0xff, 0xff};
1476
1477 /* clear type-dependent union */
1478 memset(&sdata->u, 0, sizeof(sdata->u));
1479
1480 /* and set some type-dependent values */
1481 sdata->vif.type = type;
1482 sdata->vif.p2p = false;
1483 sdata->wdev.iftype = type;
1484
1485 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1486 sdata->control_port_no_encrypt = false;
1487 sdata->control_port_over_nl80211 = false;
1488 sdata->control_port_no_preauth = false;
1489 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1490 sdata->vif.bss_conf.idle = true;
1491 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1492
1493 sdata->noack_map = 0;
1494
1495 /* only monitor/p2p-device differ */
1496 if (sdata->dev) {
1497 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1498 sdata->dev->type = ARPHRD_ETHER;
1499 }
1500
1501 skb_queue_head_init(&sdata->skb_queue);
1502 INIT_WORK(&sdata->work, ieee80211_iface_work);
1503 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1504 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1505 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1506 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1507
1508 switch (type) {
1509 case NL80211_IFTYPE_P2P_GO:
1510 type = NL80211_IFTYPE_AP;
1511 sdata->vif.type = type;
1512 sdata->vif.p2p = true;
1513 fallthrough;
1514 case NL80211_IFTYPE_AP:
1515 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1516 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1517 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1518 break;
1519 case NL80211_IFTYPE_P2P_CLIENT:
1520 type = NL80211_IFTYPE_STATION;
1521 sdata->vif.type = type;
1522 sdata->vif.p2p = true;
1523 fallthrough;
1524 case NL80211_IFTYPE_STATION:
1525 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1526 ieee80211_sta_setup_sdata(sdata);
1527 break;
1528 case NL80211_IFTYPE_OCB:
1529 sdata->vif.bss_conf.bssid = bssid_wildcard;
1530 ieee80211_ocb_setup_sdata(sdata);
1531 break;
1532 case NL80211_IFTYPE_ADHOC:
1533 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1534 ieee80211_ibss_setup_sdata(sdata);
1535 break;
1536 case NL80211_IFTYPE_MESH_POINT:
1537 if (ieee80211_vif_is_mesh(&sdata->vif))
1538 ieee80211_mesh_init_sdata(sdata);
1539 break;
1540 case NL80211_IFTYPE_MONITOR:
1541 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1542 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1543 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1544 MONITOR_FLAG_OTHER_BSS;
1545 break;
1546 case NL80211_IFTYPE_NAN:
1547 idr_init(&sdata->u.nan.function_inst_ids);
1548 spin_lock_init(&sdata->u.nan.func_lock);
1549 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1550 break;
1551 case NL80211_IFTYPE_AP_VLAN:
1552 case NL80211_IFTYPE_P2P_DEVICE:
1553 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1554 break;
1555 case NL80211_IFTYPE_UNSPECIFIED:
1556 case NL80211_IFTYPE_WDS:
1557 case NUM_NL80211_IFTYPES:
1558 WARN_ON(1);
1559 break;
1560 }
1561
1562 ieee80211_debugfs_add_netdev(sdata);
1563 }
1564
1565 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1566 enum nl80211_iftype type)
1567 {
1568 struct ieee80211_local *local = sdata->local;
1569 int ret, err;
1570 enum nl80211_iftype internal_type = type;
1571 bool p2p = false;
1572
1573 ASSERT_RTNL();
1574
1575 if (!local->ops->change_interface)
1576 return -EBUSY;
1577
1578 switch (sdata->vif.type) {
1579 case NL80211_IFTYPE_AP:
1580 case NL80211_IFTYPE_STATION:
1581 case NL80211_IFTYPE_ADHOC:
1582 case NL80211_IFTYPE_OCB:
1583 /*
1584 * Could maybe also all others here?
1585 * Just not sure how that interacts
1586 * with the RX/config path e.g. for
1587 * mesh.
1588 */
1589 break;
1590 default:
1591 return -EBUSY;
1592 }
1593
1594 switch (type) {
1595 case NL80211_IFTYPE_AP:
1596 case NL80211_IFTYPE_STATION:
1597 case NL80211_IFTYPE_ADHOC:
1598 case NL80211_IFTYPE_OCB:
1599 /*
1600 * Could probably support everything
1601 * but here.
1602 */
1603 break;
1604 case NL80211_IFTYPE_P2P_CLIENT:
1605 p2p = true;
1606 internal_type = NL80211_IFTYPE_STATION;
1607 break;
1608 case NL80211_IFTYPE_P2P_GO:
1609 p2p = true;
1610 internal_type = NL80211_IFTYPE_AP;
1611 break;
1612 default:
1613 return -EBUSY;
1614 }
1615
1616 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1617 if (ret)
1618 return ret;
1619
1620 ieee80211_do_stop(sdata, false);
1621
1622 ieee80211_teardown_sdata(sdata);
1623
1624 ieee80211_set_sdata_offload_flags(sdata);
1625 ret = drv_change_interface(local, sdata, internal_type, p2p);
1626 if (ret)
1627 type = ieee80211_vif_type_p2p(&sdata->vif);
1628
1629 /*
1630 * Ignore return value here, there's not much we can do since
1631 * the driver changed the interface type internally already.
1632 * The warnings will hopefully make driver authors fix it :-)
1633 */
1634 ieee80211_check_queues(sdata, type);
1635
1636 ieee80211_setup_sdata(sdata, type);
1637 ieee80211_set_vif_encap_ops(sdata);
1638
1639 err = ieee80211_do_open(&sdata->wdev, false);
1640 WARN(err, "type change: do_open returned %d", err);
1641
1642 return ret;
1643 }
1644
1645 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1646 enum nl80211_iftype type)
1647 {
1648 int ret;
1649
1650 ASSERT_RTNL();
1651
1652 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1653 return 0;
1654
1655 if (ieee80211_sdata_running(sdata)) {
1656 ret = ieee80211_runtime_change_iftype(sdata, type);
1657 if (ret)
1658 return ret;
1659 } else {
1660 /* Purge and reset type-dependent state. */
1661 ieee80211_teardown_sdata(sdata);
1662 ieee80211_setup_sdata(sdata, type);
1663 }
1664
1665 /* reset some values that shouldn't be kept across type changes */
1666 if (type == NL80211_IFTYPE_STATION)
1667 sdata->u.mgd.use_4addr = false;
1668
1669 return 0;
1670 }
1671
1672 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1673 u8 *perm_addr, enum nl80211_iftype type)
1674 {
1675 struct ieee80211_sub_if_data *sdata;
1676 u64 mask, start, addr, val, inc;
1677 u8 *m;
1678 u8 tmp_addr[ETH_ALEN];
1679 int i;
1680
1681 /* default ... something at least */
1682 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1683
1684 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1685 local->hw.wiphy->n_addresses <= 1)
1686 return;
1687
1688 mutex_lock(&local->iflist_mtx);
1689
1690 switch (type) {
1691 case NL80211_IFTYPE_MONITOR:
1692 /* doesn't matter */
1693 break;
1694 case NL80211_IFTYPE_AP_VLAN:
1695 /* match up with an AP interface */
1696 list_for_each_entry(sdata, &local->interfaces, list) {
1697 if (sdata->vif.type != NL80211_IFTYPE_AP)
1698 continue;
1699 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1700 break;
1701 }
1702 /* keep default if no AP interface present */
1703 break;
1704 case NL80211_IFTYPE_P2P_CLIENT:
1705 case NL80211_IFTYPE_P2P_GO:
1706 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1707 list_for_each_entry(sdata, &local->interfaces, list) {
1708 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1709 continue;
1710 if (!ieee80211_sdata_running(sdata))
1711 continue;
1712 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1713 goto out_unlock;
1714 }
1715 }
1716 fallthrough;
1717 default:
1718 /* assign a new address if possible -- try n_addresses first */
1719 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1720 bool used = false;
1721
1722 list_for_each_entry(sdata, &local->interfaces, list) {
1723 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1724 sdata->vif.addr)) {
1725 used = true;
1726 break;
1727 }
1728 }
1729
1730 if (!used) {
1731 memcpy(perm_addr,
1732 local->hw.wiphy->addresses[i].addr,
1733 ETH_ALEN);
1734 break;
1735 }
1736 }
1737
1738 /* try mask if available */
1739 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1740 break;
1741
1742 m = local->hw.wiphy->addr_mask;
1743 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1744 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1745 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1746
1747 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1748 /* not a contiguous mask ... not handled now! */
1749 pr_info("not contiguous\n");
1750 break;
1751 }
1752
1753 /*
1754 * Pick address of existing interface in case user changed
1755 * MAC address manually, default to perm_addr.
1756 */
1757 m = local->hw.wiphy->perm_addr;
1758 list_for_each_entry(sdata, &local->interfaces, list) {
1759 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1760 continue;
1761 m = sdata->vif.addr;
1762 break;
1763 }
1764 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1765 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1766 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1767
1768 inc = 1ULL<<__ffs64(mask);
1769 val = (start & mask);
1770 addr = (start & ~mask) | (val & mask);
1771 do {
1772 bool used = false;
1773
1774 tmp_addr[5] = addr >> 0*8;
1775 tmp_addr[4] = addr >> 1*8;
1776 tmp_addr[3] = addr >> 2*8;
1777 tmp_addr[2] = addr >> 3*8;
1778 tmp_addr[1] = addr >> 4*8;
1779 tmp_addr[0] = addr >> 5*8;
1780
1781 val += inc;
1782
1783 list_for_each_entry(sdata, &local->interfaces, list) {
1784 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1785 used = true;
1786 break;
1787 }
1788 }
1789
1790 if (!used) {
1791 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1792 break;
1793 }
1794 addr = (start & ~mask) | (val & mask);
1795 } while (addr != start);
1796
1797 break;
1798 }
1799
1800 out_unlock:
1801 mutex_unlock(&local->iflist_mtx);
1802 }
1803
1804 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1805 unsigned char name_assign_type,
1806 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1807 struct vif_params *params)
1808 {
1809 struct net_device *ndev = NULL;
1810 struct ieee80211_sub_if_data *sdata = NULL;
1811 struct txq_info *txqi;
1812 void (*if_setup)(struct net_device *dev);
1813 int ret, i;
1814 int txqs = 1;
1815
1816 ASSERT_RTNL();
1817
1818 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1819 struct wireless_dev *wdev;
1820
1821 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1822 GFP_KERNEL);
1823 if (!sdata)
1824 return -ENOMEM;
1825 wdev = &sdata->wdev;
1826
1827 sdata->dev = NULL;
1828 strlcpy(sdata->name, name, IFNAMSIZ);
1829 ieee80211_assign_perm_addr(local, wdev->address, type);
1830 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1831 } else {
1832 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1833 sizeof(void *));
1834 int txq_size = 0;
1835
1836 if (local->ops->wake_tx_queue &&
1837 type != NL80211_IFTYPE_AP_VLAN &&
1838 (type != NL80211_IFTYPE_MONITOR ||
1839 (params->flags & MONITOR_FLAG_ACTIVE)))
1840 txq_size += sizeof(struct txq_info) +
1841 local->hw.txq_data_size;
1842
1843 if (local->ops->wake_tx_queue) {
1844 if_setup = ieee80211_if_setup_no_queue;
1845 } else {
1846 if_setup = ieee80211_if_setup;
1847 if (local->hw.queues >= IEEE80211_NUM_ACS)
1848 txqs = IEEE80211_NUM_ACS;
1849 }
1850
1851 ndev = alloc_netdev_mqs(size + txq_size,
1852 name, name_assign_type,
1853 if_setup, txqs, 1);
1854 if (!ndev)
1855 return -ENOMEM;
1856
1857 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1858 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1859
1860 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1861
1862 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1863 if (!ndev->tstats) {
1864 free_netdev(ndev);
1865 return -ENOMEM;
1866 }
1867
1868 ndev->needed_headroom = local->tx_headroom +
1869 4*6 /* four MAC addresses */
1870 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1871 + 6 /* mesh */
1872 + 8 /* rfc1042/bridge tunnel */
1873 - ETH_HLEN /* ethernet hard_header_len */
1874 + IEEE80211_ENCRYPT_HEADROOM;
1875 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1876
1877 ret = dev_alloc_name(ndev, ndev->name);
1878 if (ret < 0) {
1879 ieee80211_if_free(ndev);
1880 free_netdev(ndev);
1881 return ret;
1882 }
1883
1884 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1885 if (is_valid_ether_addr(params->macaddr))
1886 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1887 else
1888 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1889 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1890
1891 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1892 sdata = netdev_priv(ndev);
1893 ndev->ieee80211_ptr = &sdata->wdev;
1894 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1895 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1896
1897 if (txq_size) {
1898 txqi = netdev_priv(ndev) + size;
1899 ieee80211_txq_init(sdata, NULL, txqi, 0);
1900 }
1901
1902 sdata->dev = ndev;
1903 }
1904
1905 /* initialise type-independent data */
1906 sdata->wdev.wiphy = local->hw.wiphy;
1907 sdata->local = local;
1908
1909 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1910 skb_queue_head_init(&sdata->fragments[i].skb_list);
1911
1912 INIT_LIST_HEAD(&sdata->key_list);
1913
1914 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1915 ieee80211_dfs_cac_timer_work);
1916 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1917 ieee80211_delayed_tailroom_dec);
1918
1919 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1920 struct ieee80211_supported_band *sband;
1921 sband = local->hw.wiphy->bands[i];
1922 sdata->rc_rateidx_mask[i] =
1923 sband ? (1 << sband->n_bitrates) - 1 : 0;
1924 if (sband) {
1925 __le16 cap;
1926 u16 *vht_rate_mask;
1927
1928 memcpy(sdata->rc_rateidx_mcs_mask[i],
1929 sband->ht_cap.mcs.rx_mask,
1930 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1931
1932 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1933 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1934 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1935 } else {
1936 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1937 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1938 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1939 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1940 }
1941 }
1942
1943 ieee80211_set_default_queues(sdata);
1944
1945 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1946 sdata->user_power_level = local->user_power_level;
1947
1948 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1949
1950 /* setup type-dependent data */
1951 ieee80211_setup_sdata(sdata, type);
1952
1953 if (ndev) {
1954 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1955 if (type == NL80211_IFTYPE_STATION)
1956 sdata->u.mgd.use_4addr = params->use_4addr;
1957
1958 ndev->features |= local->hw.netdev_features;
1959 ndev->hw_features |= ndev->features &
1960 MAC80211_SUPPORTED_FEATURES_TX;
1961
1962 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1963
1964 /* MTU range: 256 - 2304 */
1965 ndev->min_mtu = 256;
1966 ndev->max_mtu = local->hw.max_mtu;
1967
1968 ret = register_netdevice(ndev);
1969 if (ret) {
1970 free_netdev(ndev);
1971 return ret;
1972 }
1973 }
1974
1975 mutex_lock(&local->iflist_mtx);
1976 list_add_tail_rcu(&sdata->list, &local->interfaces);
1977 mutex_unlock(&local->iflist_mtx);
1978
1979 if (new_wdev)
1980 *new_wdev = &sdata->wdev;
1981
1982 return 0;
1983 }
1984
1985 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1986 {
1987 ASSERT_RTNL();
1988
1989 mutex_lock(&sdata->local->iflist_mtx);
1990 list_del_rcu(&sdata->list);
1991 mutex_unlock(&sdata->local->iflist_mtx);
1992
1993 if (sdata->vif.txq)
1994 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1995
1996 synchronize_rcu();
1997
1998 if (sdata->dev) {
1999 unregister_netdevice(sdata->dev);
2000 } else {
2001 cfg80211_unregister_wdev(&sdata->wdev);
2002 ieee80211_teardown_sdata(sdata);
2003 kfree(sdata);
2004 }
2005 }
2006
2007 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2008 {
2009 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2010 return;
2011 ieee80211_do_stop(sdata, true);
2012 }
2013
2014 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2015 {
2016 struct ieee80211_sub_if_data *sdata, *tmp;
2017 LIST_HEAD(unreg_list);
2018 LIST_HEAD(wdev_list);
2019
2020 ASSERT_RTNL();
2021
2022 /* Before destroying the interfaces, make sure they're all stopped so
2023 * that the hardware is stopped. Otherwise, the driver might still be
2024 * iterating the interfaces during the shutdown, e.g. from a worker
2025 * or from RX processing or similar, and if it does so (using atomic
2026 * iteration) while we're manipulating the list, the iteration will
2027 * crash.
2028 *
2029 * After this, the hardware should be stopped and the driver should
2030 * have stopped all of its activities, so that we can do RCU-unaware
2031 * manipulations of the interface list below.
2032 */
2033 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2034
2035 WARN(local->open_count, "%s: open count remains %d\n",
2036 wiphy_name(local->hw.wiphy), local->open_count);
2037
2038 ieee80211_txq_teardown_flows(local);
2039
2040 mutex_lock(&local->iflist_mtx);
2041 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2042 list_del(&sdata->list);
2043
2044 if (sdata->dev)
2045 unregister_netdevice_queue(sdata->dev, &unreg_list);
2046 else
2047 list_add(&sdata->list, &wdev_list);
2048 }
2049 mutex_unlock(&local->iflist_mtx);
2050 unregister_netdevice_many(&unreg_list);
2051
2052 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2053 list_del(&sdata->list);
2054 cfg80211_unregister_wdev(&sdata->wdev);
2055 kfree(sdata);
2056 }
2057 }
2058
2059 static int netdev_notify(struct notifier_block *nb,
2060 unsigned long state, void *ptr)
2061 {
2062 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2063 struct ieee80211_sub_if_data *sdata;
2064
2065 if (state != NETDEV_CHANGENAME)
2066 return NOTIFY_DONE;
2067
2068 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2069 return NOTIFY_DONE;
2070
2071 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2072 return NOTIFY_DONE;
2073
2074 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2075 memcpy(sdata->name, dev->name, IFNAMSIZ);
2076 ieee80211_debugfs_rename_netdev(sdata);
2077
2078 return NOTIFY_OK;
2079 }
2080
2081 static struct notifier_block mac80211_netdev_notifier = {
2082 .notifier_call = netdev_notify,
2083 };
2084
2085 int ieee80211_iface_init(void)
2086 {
2087 return register_netdevice_notifier(&mac80211_netdev_notifier);
2088 }
2089
2090 void ieee80211_iface_exit(void)
2091 {
2092 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2093 }
2094
2095 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2096 {
2097 if (sdata->vif.type == NL80211_IFTYPE_AP)
2098 atomic_inc(&sdata->u.ap.num_mcast_sta);
2099 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2100 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2101 }
2102
2103 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2104 {
2105 if (sdata->vif.type == NL80211_IFTYPE_AP)
2106 atomic_dec(&sdata->u.ap.num_mcast_sta);
2107 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2108 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2109 }
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