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) 2018-2026 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 <linux/kcov.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
22 #include "sta_info.h"
23 #include "debugfs_netdev.h"
24 #include "mesh.h"
25 #include "led.h"
26 #include "driver-ops.h"
27 #include "wme.h"
28 #include "rate.h"
29
30 /**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL *and* wiphy mutex
37 * *and* iflist_mtx
38 * (2) 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 wiphy mutex, the iflist_mtx or RCU.
43 */
44
45 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work);
46
__ieee80211_recalc_txpower(struct ieee80211_link_data * link)47 bool __ieee80211_recalc_txpower(struct ieee80211_link_data *link)
48 {
49 struct ieee80211_chanctx_conf *chanctx_conf;
50 int power;
51
52 rcu_read_lock();
53 chanctx_conf = rcu_dereference(link->conf->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 (link->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, link->user_power_level);
64
65 if (link->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, link->ap_power_level);
67
68 if (power != link->conf->txpower) {
69 link->conf->txpower = power;
70 return true;
71 }
72
73 return false;
74 }
75
ieee80211_recalc_txpower(struct ieee80211_link_data * link,bool update_bss)76 void ieee80211_recalc_txpower(struct ieee80211_link_data *link,
77 bool update_bss)
78 {
79 if (__ieee80211_recalc_txpower(link) ||
80 (update_bss && ieee80211_sdata_running(link->sdata)))
81 ieee80211_link_info_change_notify(link->sdata, link,
82 BSS_CHANGED_TXPOWER);
83 }
84
__ieee80211_idle_off(struct ieee80211_local * local)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
__ieee80211_idle_on(struct ieee80211_local * local)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
__ieee80211_recalc_idle(struct ieee80211_local * local,bool force_active)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 struct ieee80211_sub_if_data *iter;
111
112 lockdep_assert_wiphy(local->hw.wiphy);
113
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
116 local->monitors;
117
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
120
121 list_for_each_entry(iter, &local->interfaces, list) {
122 if (iter->vif.type == NL80211_IFTYPE_NAN &&
123 iter->u.nan.started) {
124 working = true;
125 break;
126 }
127 }
128
129 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
130 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
131
132 if (working || scanning)
133 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
134 else
135 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
136
137 if (active)
138 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
139 else
140 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
141
142 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
143
144 if (working || scanning || active)
145 return __ieee80211_idle_off(local);
146 return __ieee80211_idle_on(local);
147 }
148
ieee80211_idle_off(struct ieee80211_local * local)149 u32 ieee80211_idle_off(struct ieee80211_local *local)
150 {
151 return __ieee80211_recalc_idle(local, true);
152 }
153
ieee80211_recalc_idle(struct ieee80211_local * local)154 void ieee80211_recalc_idle(struct ieee80211_local *local)
155 {
156 u32 change = __ieee80211_recalc_idle(local, false);
157 if (change)
158 ieee80211_hw_config(local, -1, change);
159 }
160
ieee80211_verify_mac(struct ieee80211_sub_if_data * sdata,u8 * addr,bool check_dup)161 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
162 bool check_dup)
163 {
164 struct ieee80211_local *local = sdata->local;
165 struct ieee80211_sub_if_data *iter;
166 u64 new, mask, tmp;
167 u8 *m;
168 int ret = 0;
169
170 lockdep_assert_wiphy(local->hw.wiphy);
171
172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 return 0;
174
175 m = addr;
176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179
180 m = local->hw.wiphy->addr_mask;
181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
184
185 if (!check_dup)
186 return ret;
187
188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
190 continue;
191
192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
194 continue;
195
196 m = iter->vif.addr;
197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206
207 return ret;
208 }
209
ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data * sdata)210 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
211 {
212 struct ieee80211_roc_work *roc;
213 struct ieee80211_local *local = sdata->local;
214 struct ieee80211_sub_if_data *scan_sdata;
215 int ret = 0;
216
217 lockdep_assert_wiphy(local->hw.wiphy);
218
219 /* To be the most flexible here we want to only limit changing the
220 * address if the specific interface is doing offchannel work or
221 * scanning.
222 */
223 if (netif_carrier_ok(sdata->dev))
224 return -EBUSY;
225
226 /* if any stations are set known (so they know this vif too), reject */
227 if (sta_info_get_by_idx(sdata, 0))
228 return -EBUSY;
229
230 /* First check no ROC work is happening on this iface */
231 list_for_each_entry(roc, &local->roc_list, list) {
232 if (roc->sdata != sdata)
233 continue;
234
235 if (roc->started) {
236 ret = -EBUSY;
237 goto unlock;
238 }
239 }
240
241 /* And if this iface is scanning */
242 if (local->scanning) {
243 scan_sdata = rcu_dereference_protected(local->scan_sdata,
244 lockdep_is_held(&local->hw.wiphy->mtx));
245 if (sdata == scan_sdata)
246 ret = -EBUSY;
247 }
248
249 /*
250 * More interface types could be added here but changing the
251 * address while powered makes the most sense in client modes.
252 */
253 switch (sdata->vif.type) {
254 case NL80211_IFTYPE_STATION:
255 case NL80211_IFTYPE_P2P_CLIENT:
256 /* refuse while connecting */
257 if (sdata->u.mgd.auth_data || sdata->u.mgd.assoc_data)
258 return -EBUSY;
259 break;
260 default:
261 ret = -EOPNOTSUPP;
262 }
263
264 unlock:
265 return ret;
266 }
267
_ieee80211_change_mac(struct ieee80211_sub_if_data * sdata,void * addr)268 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
269 void *addr)
270 {
271 struct ieee80211_local *local = sdata->local;
272 struct sockaddr *sa = addr;
273 bool check_dup = true;
274 bool live = false;
275 int ret;
276
277 if (ieee80211_sdata_running(sdata)) {
278 ret = ieee80211_can_powered_addr_change(sdata);
279 if (ret)
280 return ret;
281
282 live = true;
283 }
284
285 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
286 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
287 check_dup = false;
288
289 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
290 if (ret)
291 return ret;
292
293 if (live)
294 drv_remove_interface(local, sdata);
295 ret = eth_mac_addr(sdata->dev, sa);
296
297 if (ret == 0) {
298 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
299 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
300 }
301
302 /* Regardless of eth_mac_addr() return we still want to add the
303 * interface back. This should not fail...
304 */
305 if (live)
306 WARN_ON(drv_add_interface(local, sdata));
307
308 return ret;
309 }
310
ieee80211_change_mac(struct net_device * dev,void * addr)311 static int ieee80211_change_mac(struct net_device *dev, void *addr)
312 {
313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
314 struct ieee80211_local *local = sdata->local;
315
316 /*
317 * This happens during unregistration if there's a bond device
318 * active (maybe other cases?) and we must get removed from it.
319 * But we really don't care anymore if it's not registered now.
320 */
321 if (!dev->ieee80211_ptr->registered)
322 return 0;
323
324 guard(wiphy)(local->hw.wiphy);
325
326 return _ieee80211_change_mac(sdata, addr);
327 }
328
identical_mac_addr_allowed(int type1,int type2)329 static inline int identical_mac_addr_allowed(int type1, int type2)
330 {
331 return type1 == NL80211_IFTYPE_MONITOR ||
332 type2 == NL80211_IFTYPE_MONITOR ||
333 type1 == NL80211_IFTYPE_P2P_DEVICE ||
334 type2 == NL80211_IFTYPE_P2P_DEVICE ||
335 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
336 (type1 == NL80211_IFTYPE_AP_VLAN &&
337 (type2 == NL80211_IFTYPE_AP ||
338 type2 == NL80211_IFTYPE_AP_VLAN));
339 }
340
ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)341 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
342 enum nl80211_iftype iftype)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_sub_if_data *nsdata;
346
347 ASSERT_RTNL();
348 lockdep_assert_wiphy(local->hw.wiphy);
349
350 /* we hold the RTNL here so can safely walk the list */
351 list_for_each_entry(nsdata, &local->interfaces, list) {
352 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
353 struct ieee80211_link_data *link;
354
355 /*
356 * Only OCB and monitor mode may coexist
357 */
358 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
359 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
360 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
361 nsdata->vif.type == NL80211_IFTYPE_OCB))
362 return -EBUSY;
363
364 /*
365 * A NAN DATA interface is correlated to the NAN
366 * (management) one
367 */
368 if (iftype == NL80211_IFTYPE_NAN_DATA &&
369 nsdata->vif.type == NL80211_IFTYPE_NAN) {
370 if (!nsdata->u.nan.started)
371 return -EINVAL;
372 rcu_assign_pointer(sdata->u.nan_data.nmi, nsdata);
373 }
374
375 /*
376 * Allow only a single IBSS interface to be up at any
377 * time. This is restricted because beacon distribution
378 * cannot work properly if both are in the same IBSS.
379 *
380 * To remove this restriction we'd have to disallow them
381 * from setting the same SSID on different IBSS interfaces
382 * belonging to the same hardware. Then, however, we're
383 * faced with having to adopt two different TSF timers...
384 */
385 if (iftype == NL80211_IFTYPE_ADHOC &&
386 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
387 return -EBUSY;
388 /*
389 * will not add another interface while any channel
390 * switch is active.
391 */
392 for_each_link_data(nsdata, link) {
393 if (link->conf->csa_active)
394 return -EBUSY;
395 }
396
397 /*
398 * The remaining checks are only performed for interfaces
399 * with the same MAC address.
400 */
401 if (!ether_addr_equal(sdata->vif.addr,
402 nsdata->vif.addr))
403 continue;
404
405 /*
406 * check whether it may have the same address
407 */
408 if (!identical_mac_addr_allowed(iftype,
409 nsdata->vif.type))
410 return -ENOTUNIQ;
411
412 /*
413 * can only add VLANs to enabled APs
414 */
415 if (iftype == NL80211_IFTYPE_AP_VLAN &&
416 nsdata->vif.type == NL80211_IFTYPE_AP)
417 sdata->bss = &nsdata->u.ap;
418 }
419 }
420
421 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1);
422 }
423
ieee80211_check_queues(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)424 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
425 enum nl80211_iftype iftype)
426 {
427 int n_queues = sdata->local->hw.queues;
428 int i;
429
430 if (iftype == NL80211_IFTYPE_NAN)
431 return 0;
432
433 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
434 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
435 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
436 IEEE80211_INVAL_HW_QUEUE))
437 return -EINVAL;
438 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
439 n_queues))
440 return -EINVAL;
441 }
442 }
443
444 if ((iftype != NL80211_IFTYPE_AP &&
445 iftype != NL80211_IFTYPE_P2P_GO &&
446 iftype != NL80211_IFTYPE_MESH_POINT) ||
447 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
448 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
449 return 0;
450 }
451
452 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
453 return -EINVAL;
454
455 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
456 return -EINVAL;
457
458 return 0;
459 }
460
ieee80211_open(struct net_device * dev)461 static int ieee80211_open(struct net_device *dev)
462 {
463 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
464 int err;
465
466 /* fail early if user set an invalid address */
467 if (!is_valid_ether_addr(dev->dev_addr))
468 return -EADDRNOTAVAIL;
469
470 guard(wiphy)(sdata->local->hw.wiphy);
471
472 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
473 if (err)
474 return err;
475
476 return ieee80211_do_open(&sdata->wdev, true);
477 }
478
ieee80211_do_stop(struct ieee80211_sub_if_data * sdata,bool going_down)479 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
480 {
481 struct ieee80211_local *local = sdata->local;
482 struct ieee80211_sub_if_data *iter;
483 unsigned long flags;
484 struct sk_buff_head freeq;
485 struct sk_buff *skb, *tmp;
486 u32 hw_reconf_flags = 0;
487 int i, flushed;
488 struct ps_data *ps;
489 struct cfg80211_chan_def chandef;
490 bool cancel_scan;
491 struct cfg80211_nan_func *func;
492
493 lockdep_assert_wiphy(local->hw.wiphy);
494
495 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
496 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
497
498 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
499 if (cancel_scan)
500 ieee80211_scan_cancel(local);
501
502 ieee80211_roc_purge(local, sdata);
503
504 switch (sdata->vif.type) {
505 case NL80211_IFTYPE_STATION:
506 ieee80211_mgd_stop(sdata);
507 break;
508 case NL80211_IFTYPE_ADHOC:
509 ieee80211_ibss_stop(sdata);
510 break;
511 case NL80211_IFTYPE_MONITOR:
512 list_del_rcu(&sdata->u.mntr.list);
513 break;
514 case NL80211_IFTYPE_AP_VLAN:
515 ieee80211_apvlan_link_clear(sdata);
516 break;
517 default:
518 break;
519 }
520
521 /*
522 * Remove all stations associated with this interface.
523 *
524 * This must be done before calling ops->remove_interface()
525 * because otherwise we can later invoke ops->sta_notify()
526 * whenever the STAs are removed, and that invalidates driver
527 * assumptions about always getting a vif pointer that is valid
528 * (because if we remove a STA after ops->remove_interface()
529 * the driver will have removed the vif info already!)
530 *
531 * For AP_VLANs, NAN and NAN_DATA stations may exist since there's
532 * nothing else that would have removed them, but in other modes there
533 * shouldn't be any stations.
534 */
535 flushed = sta_info_flush(sdata, -1);
536 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
537 sdata->vif.type != NL80211_IFTYPE_NAN &&
538 sdata->vif.type != NL80211_IFTYPE_NAN_DATA && flushed > 0);
539
540 /* don't count this interface for allmulti while it is down */
541 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
542 atomic_dec(&local->iff_allmultis);
543
544 if (sdata->vif.type == NL80211_IFTYPE_AP) {
545 local->fif_pspoll--;
546 local->fif_probe_req--;
547 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
548 local->fif_probe_req--;
549 }
550
551 if (sdata->dev) {
552 netif_addr_lock_bh(sdata->dev);
553 spin_lock_bh(&local->filter_lock);
554 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
555 sdata->dev->addr_len);
556 spin_unlock_bh(&local->filter_lock);
557 netif_addr_unlock_bh(sdata->dev);
558 }
559
560 timer_delete_sync(&local->dynamic_ps_timer);
561 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
562
563 WARN(ieee80211_vif_is_mld(&sdata->vif),
564 "destroying interface with valid links 0x%04x\n",
565 sdata->vif.valid_links);
566
567 sdata->vif.bss_conf.csa_active = false;
568 if (sdata->vif.type == NL80211_IFTYPE_STATION)
569 sdata->deflink.u.mgd.csa.waiting_bcn = false;
570 ieee80211_vif_unblock_queues_csa(sdata);
571
572 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work);
573 wiphy_work_cancel(local->hw.wiphy,
574 &sdata->deflink.color_change_finalize_work);
575 wiphy_hrtimer_work_cancel(local->hw.wiphy,
576 &sdata->deflink.dfs_cac_timer_work);
577
578 if (sdata->wdev.links[0].cac_started) {
579 chandef = sdata->vif.bss_conf.chanreq.oper;
580 WARN_ON(local->suspended);
581 ieee80211_link_release_channel(&sdata->deflink);
582 cfg80211_cac_event(sdata->dev, &chandef,
583 NL80211_RADAR_CAC_ABORTED,
584 GFP_KERNEL, 0);
585 }
586
587 if (sdata->vif.type == NL80211_IFTYPE_AP) {
588 WARN_ON(!list_empty(&sdata->u.ap.vlans));
589 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
590 /* remove all packets in parent bc_buf pointing to this dev */
591 __skb_queue_head_init(&freeq);
592 ps = &sdata->bss->ps;
593
594 spin_lock_irqsave(&ps->bc_buf.lock, flags);
595 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
596 if (skb->dev == sdata->dev) {
597 __skb_unlink(skb, &ps->bc_buf);
598 local->total_ps_buffered--;
599 __skb_queue_tail(&freeq, skb);
600 }
601 }
602 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
603
604 skb_queue_walk_safe(&freeq, skb, tmp) {
605 __skb_unlink(skb, &freeq);
606 ieee80211_free_txskb(&local->hw, skb);
607 }
608 }
609
610 if (going_down)
611 local->open_count--;
612
613 switch (sdata->vif.type) {
614 case NL80211_IFTYPE_AP_VLAN:
615 list_del(&sdata->u.vlan.list);
616 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
617 /* see comment in the default case below */
618 ieee80211_free_keys(sdata, true);
619 /* increased by AP value on ifup, so reset on ifdown */
620 sdata->crypto_tx_tailroom_needed_cnt = 0;
621 /* no need to tell driver */
622 break;
623 case NL80211_IFTYPE_MONITOR:
624 local->monitors--;
625
626 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
627 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
628
629 local->virt_monitors--;
630 if (local->virt_monitors == 0) {
631 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
632 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
633 }
634
635 ieee80211_adjust_monitor_flags(sdata, -1);
636 }
637 break;
638 case NL80211_IFTYPE_NAN:
639 /* Check if any open NAN_DATA interfaces */
640 list_for_each_entry(iter, &local->interfaces, list) {
641 WARN_ON(iter->vif.type == NL80211_IFTYPE_NAN_DATA &&
642 ieee80211_sdata_running(iter));
643 }
644
645 /* clean all the functions */
646 if (!(local->hw.wiphy->nan_capa.flags &
647 WIPHY_NAN_FLAGS_USERSPACE_DE)) {
648 spin_lock_bh(&sdata->u.nan.de.func_lock);
649
650 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids,
651 func, i) {
652 idr_remove(&sdata->u.nan.de.function_inst_ids, i);
653 cfg80211_free_nan_func(func);
654 }
655 idr_destroy(&sdata->u.nan.de.function_inst_ids);
656
657 spin_unlock_bh(&sdata->u.nan.de.func_lock);
658 }
659
660 /*
661 * Free the remaining keys that might be associated with the
662 * NAN interface, e.g., IGTK and BIGTK used for Tx.
663 */
664 ieee80211_free_keys(sdata, true);
665 break;
666 case NL80211_IFTYPE_NAN_DATA:
667 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL);
668 fallthrough;
669 default:
670 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
671 /*
672 * When we get here, the interface is marked down.
673 * Free the remaining keys, if there are any
674 * (which can happen in AP mode if userspace sets
675 * keys before the interface is operating)
676 *
677 * Force the key freeing to always synchronize_net()
678 * to wait for the RX path in case it is using this
679 * interface enqueuing frames at this very time on
680 * another CPU.
681 */
682 ieee80211_free_keys(sdata, true);
683 skb_queue_purge(&sdata->skb_queue);
684 skb_queue_purge(&sdata->status_queue);
685 }
686
687 /*
688 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
689 * which should be called with interrupts enabled, reclamation
690 * is done in two phases:
691 */
692 __skb_queue_head_init(&freeq);
693
694 /* unlink from local queues... */
695 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
696 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
697 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
698 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
699 if (info->control.vif == &sdata->vif) {
700 __skb_unlink(skb, &local->pending[i]);
701 __skb_queue_tail(&freeq, skb);
702 }
703 }
704 }
705 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
706
707 /* ... and perform actual reclamation with interrupts enabled. */
708 skb_queue_walk_safe(&freeq, skb, tmp) {
709 __skb_unlink(skb, &freeq);
710 ieee80211_free_txskb(&local->hw, skb);
711 }
712
713 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
714 ieee80211_txq_remove_vlan(local, sdata);
715
716 if (sdata->vif.txq)
717 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
718
719 if (sdata->vif.txq_mgmt)
720 ieee80211_txq_purge(sdata->local,
721 to_txq_info(sdata->vif.txq_mgmt));
722
723 sdata->bss = NULL;
724
725 if (local->open_count == 0)
726 ieee80211_clear_tx_pending(local);
727
728 sdata->vif.bss_conf.beacon_int = 0;
729
730 /*
731 * If the interface goes down while suspended, presumably because
732 * the device was unplugged and that happens before our resume,
733 * then the driver is already unconfigured and the remainder of
734 * this function isn't needed.
735 * XXX: what about WoWLAN? If the device has software state, e.g.
736 * memory allocated, it might expect teardown commands from
737 * mac80211 here?
738 */
739 if (local->suspended) {
740 WARN_ON(local->wowlan);
741 WARN_ON(rcu_access_pointer(local->monitor_sdata));
742 return;
743 }
744
745 switch (sdata->vif.type) {
746 case NL80211_IFTYPE_AP_VLAN:
747 break;
748 case NL80211_IFTYPE_MONITOR:
749 if (local->virt_monitors == 0)
750 ieee80211_del_virtual_monitor(local);
751
752 ieee80211_recalc_idle(local);
753 ieee80211_recalc_offload(local);
754
755 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
756 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
757 break;
758
759 ieee80211_link_release_channel(&sdata->deflink);
760 fallthrough;
761 default:
762 if (!going_down)
763 break;
764 drv_remove_interface(local, sdata);
765
766 /* Clear private driver data to prevent reuse */
767 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size);
768 }
769
770 ieee80211_recalc_ps(local);
771
772 if (cancel_scan)
773 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
774
775 if (local->open_count == 0) {
776 ieee80211_stop_device(local, false);
777
778 /* no reconfiguring after stop! */
779 return;
780 }
781
782 /* do after stop to avoid reconfiguring when we stop anyway */
783 ieee80211_configure_filter(local);
784 ieee80211_hw_config(local, -1, hw_reconf_flags);
785
786 /* Passing NULL means an interface is picked for configuration */
787 if (local->virt_monitors == local->open_count)
788 ieee80211_add_virtual_monitor(local, NULL);
789 }
790
ieee80211_stop_mbssid(struct ieee80211_sub_if_data * sdata)791 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
792 {
793 struct ieee80211_sub_if_data *tx_sdata;
794 struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
795 struct ieee80211_link_data *tx_link, *link;
796 unsigned int link_id;
797
798 lockdep_assert_wiphy(sdata->local->hw.wiphy);
799
800 /* Check if any of the links of current sdata is an MBSSID. */
801 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
802 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
803 if (!tx_bss_conf)
804 continue;
805
806 tx_sdata = vif_to_sdata(tx_bss_conf->vif);
807 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
808
809 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion
810 * while closing tx sdata at the end of outer loop below.
811 */
812 if (sdata != tx_sdata) {
813 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id],
814 tx_sdata);
815 if (!tx_link)
816 continue;
817
818 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
819 }
820
821 /* loop through sdatas to find if any of their links
822 * belong to same MBSSID set as the one getting deleted.
823 */
824 for_each_sdata_link(tx_sdata->local, link) {
825 struct ieee80211_sub_if_data *link_sdata = link->sdata;
826
827 if (link_sdata == sdata || link_sdata == tx_sdata ||
828 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
829 continue;
830
831 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
832
833 /* Remove all links of matching MLD until dynamic link
834 * removal can be supported.
835 */
836 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev,
837 GFP_KERNEL);
838 }
839
840 /* If we are not tx sdata, remove links of tx sdata and proceed */
841 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata))
842 cfg80211_stop_iface(tx_sdata->wdev.wiphy,
843 &tx_sdata->wdev, GFP_KERNEL);
844 }
845 }
846
ieee80211_stop(struct net_device * dev)847 static int ieee80211_stop(struct net_device *dev)
848 {
849 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
850
851 /* close dependent VLAN interfaces before locking wiphy */
852 if (sdata->vif.type == NL80211_IFTYPE_AP) {
853 struct ieee80211_sub_if_data *vlan, *tmpsdata;
854
855 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
856 u.vlan.list)
857 dev_close(vlan->dev);
858 }
859
860 guard(wiphy)(sdata->local->hw.wiphy);
861
862 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
863
864 /* Close the dependent MBSSID interfaces with wiphy lock as we may be
865 * terminating its partner links too in case of MLD.
866 */
867 if (sdata->vif.type == NL80211_IFTYPE_AP)
868 ieee80211_stop_mbssid(sdata);
869
870 ieee80211_do_stop(sdata, true);
871
872 return 0;
873 }
874
ieee80211_set_multicast_list(struct net_device * dev)875 static void ieee80211_set_multicast_list(struct net_device *dev)
876 {
877 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
878 struct ieee80211_local *local = sdata->local;
879 int allmulti, sdata_allmulti;
880
881 allmulti = !!(dev->flags & IFF_ALLMULTI);
882 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
883
884 if (allmulti != sdata_allmulti) {
885 if (dev->flags & IFF_ALLMULTI)
886 atomic_inc(&local->iff_allmultis);
887 else
888 atomic_dec(&local->iff_allmultis);
889 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
890 }
891
892 spin_lock_bh(&local->filter_lock);
893 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
894 spin_unlock_bh(&local->filter_lock);
895 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
896 }
897
898 /*
899 * Called when the netdev is removed or, by the code below, before
900 * the interface type changes.
901 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)902 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
903 {
904 if (WARN_ON(!list_empty(&sdata->work.entry)))
905 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
906
907 /* free extra data */
908 ieee80211_free_keys(sdata, false);
909
910 ieee80211_debugfs_remove_netdev(sdata);
911
912 ieee80211_destroy_frag_cache(&sdata->frags);
913
914 if (ieee80211_vif_is_mesh(&sdata->vif))
915 ieee80211_mesh_teardown_sdata(sdata);
916
917 ieee80211_vif_clear_links(sdata);
918 ieee80211_link_stop(&sdata->deflink);
919
920 if (sdata->vif.type == NL80211_IFTYPE_NAN) {
921 struct ieee80211_nan_sched_cfg *nan_sched =
922 &sdata->vif.cfg.nan_sched;
923
924 for (int i = 0; i < ARRAY_SIZE(nan_sched->channels); i++)
925 WARN_ON(nan_sched->channels[i].chanreq.oper.chan);
926 }
927 }
928
929 /*
930 * The netdev can be unregistered without mac80211 doing it, e.g. by the netdev
931 * core when cfg80211 couldn't move it out of a network namespace that's being
932 * destroyed. Drop it from the interface list either way.
933 */
ieee80211_unlist_sdata(struct ieee80211_sub_if_data * sdata)934 static void ieee80211_unlist_sdata(struct ieee80211_sub_if_data *sdata)
935 {
936 struct ieee80211_local *local = sdata->local;
937 struct ieee80211_sub_if_data *iter;
938
939 ASSERT_RTNL();
940
941 list_for_each_entry(iter, &local->interfaces, list) {
942 if (iter != sdata)
943 continue;
944 guard(mutex)(&local->iflist_mtx);
945 list_del_rcu(&sdata->list);
946 return;
947 }
948 }
949
ieee80211_uninit(struct net_device * dev)950 static void ieee80211_uninit(struct net_device *dev)
951 {
952 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
953
954 ieee80211_unlist_sdata(sdata);
955 ieee80211_teardown_sdata(sdata);
956 }
957
ieee80211_netdev_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)958 static int ieee80211_netdev_setup_tc(struct net_device *dev,
959 enum tc_setup_type type, void *type_data)
960 {
961 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
962 struct ieee80211_local *local = sdata->local;
963
964 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
965 return -EOPNOTSUPP;
966
967 return drv_net_setup_tc(local, sdata, dev, type, type_data);
968 }
969
970 static const struct net_device_ops ieee80211_dataif_ops = {
971 .ndo_open = ieee80211_open,
972 .ndo_stop = ieee80211_stop,
973 .ndo_uninit = ieee80211_uninit,
974 .ndo_start_xmit = ieee80211_subif_start_xmit,
975 .ndo_set_rx_mode = ieee80211_set_multicast_list,
976 .ndo_set_mac_address = ieee80211_change_mac,
977 .ndo_setup_tc = ieee80211_netdev_setup_tc,
978 };
979
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)980 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
981 struct sk_buff *skb,
982 struct net_device *sb_dev)
983 {
984 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
985 struct ieee80211_local *local = sdata->local;
986 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
987 struct ieee80211_hdr *hdr;
988 int len_rthdr;
989
990 if (local->hw.queues < IEEE80211_NUM_ACS)
991 return 0;
992
993 /* reset flags and info before parsing radiotap header */
994 memset(info, 0, sizeof(*info));
995
996 if (!ieee80211_parse_tx_radiotap(skb, dev, NULL))
997 return 0; /* doesn't matter, frame will be dropped */
998
999 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1000 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1001 if (skb->len < len_rthdr + 2 ||
1002 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
1003 return 0; /* doesn't matter, frame will be dropped */
1004
1005 return ieee80211_select_queue_80211(sdata, skb, hdr);
1006 }
1007
1008 static const struct net_device_ops ieee80211_monitorif_ops = {
1009 .ndo_open = ieee80211_open,
1010 .ndo_stop = ieee80211_stop,
1011 .ndo_uninit = ieee80211_uninit,
1012 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1013 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1014 .ndo_set_mac_address = ieee80211_change_mac,
1015 .ndo_select_queue = ieee80211_monitor_select_queue,
1016 };
1017
ieee80211_netdev_fill_forward_path(struct net_device_path_ctx * ctx,struct net_device_path * path)1018 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
1019 struct net_device_path *path)
1020 {
1021 struct ieee80211_sub_if_data *sdata;
1022 struct ieee80211_local *local;
1023 struct sta_info *sta;
1024 int ret = -ENOENT;
1025
1026 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
1027 local = sdata->local;
1028
1029 if (!local->ops->net_fill_forward_path)
1030 return -EOPNOTSUPP;
1031
1032 rcu_read_lock();
1033 switch (sdata->vif.type) {
1034 case NL80211_IFTYPE_AP_VLAN:
1035 sta = rcu_dereference(sdata->u.vlan.sta);
1036 if (sta)
1037 break;
1038 if (sdata->wdev.use_4addr)
1039 goto out;
1040 if (is_multicast_ether_addr(ctx->daddr))
1041 goto out;
1042 sta = sta_info_get_bss(sdata, ctx->daddr);
1043 break;
1044 case NL80211_IFTYPE_AP:
1045 if (is_multicast_ether_addr(ctx->daddr))
1046 goto out;
1047 sta = sta_info_get(sdata, ctx->daddr);
1048 break;
1049 case NL80211_IFTYPE_STATION:
1050 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1051 sta = sta_info_get(sdata, ctx->daddr);
1052 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1053 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1054 goto out;
1055
1056 break;
1057 }
1058 }
1059
1060 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
1061 break;
1062 default:
1063 goto out;
1064 }
1065
1066 if (!sta)
1067 goto out;
1068
1069 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
1070 out:
1071 rcu_read_unlock();
1072
1073 return ret;
1074 }
1075
1076 static const struct net_device_ops ieee80211_dataif_8023_ops = {
1077 .ndo_open = ieee80211_open,
1078 .ndo_stop = ieee80211_stop,
1079 .ndo_uninit = ieee80211_uninit,
1080 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1081 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1082 .ndo_set_mac_address = ieee80211_change_mac,
1083 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
1084 .ndo_setup_tc = ieee80211_netdev_setup_tc,
1085 };
1086
ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)1087 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
1088 {
1089 switch (iftype) {
1090 /* P2P GO and client are mapped to AP/STATION types */
1091 case NL80211_IFTYPE_AP:
1092 case NL80211_IFTYPE_STATION:
1093 return true;
1094 default:
1095 return false;
1096 }
1097 }
1098
ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data * sdata)1099 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
1100 {
1101 struct ieee80211_local *local = sdata->local;
1102 u32 flags;
1103
1104 flags = sdata->vif.offload_flags;
1105
1106 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
1107 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1108 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
1109
1110 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1111 local->hw.wiphy->frag_threshold != (u32)-1)
1112 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1113
1114 if (local->virt_monitors)
1115 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1116 } else {
1117 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1118 }
1119
1120 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
1121 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1122 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
1123
1124 if (local->virt_monitors &&
1125 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
1126 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1127 } else {
1128 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1129 }
1130
1131 if (sdata->vif.offload_flags == flags)
1132 return false;
1133
1134 sdata->vif.offload_flags = flags;
1135 ieee80211_check_fast_rx_iface(sdata);
1136 return true;
1137 }
1138
ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data * sdata)1139 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1140 {
1141 struct ieee80211_local *local = sdata->local;
1142 struct ieee80211_sub_if_data *bss = sdata;
1143 bool enabled;
1144
1145 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1146 if (!sdata->bss)
1147 return;
1148
1149 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1150 }
1151
1152 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1153 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1154 return;
1155
1156 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1157 if (sdata->wdev.use_4addr &&
1158 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1159 enabled = false;
1160
1161 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1162 &ieee80211_dataif_ops;
1163 }
1164
ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data * sdata)1165 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1166 {
1167 struct ieee80211_local *local = sdata->local;
1168 struct ieee80211_sub_if_data *vsdata;
1169
1170 if (ieee80211_set_sdata_offload_flags(sdata)) {
1171 drv_update_vif_offload(local, sdata);
1172 ieee80211_set_vif_encap_ops(sdata);
1173 }
1174
1175 list_for_each_entry(vsdata, &local->interfaces, list) {
1176 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1177 vsdata->bss != &sdata->u.ap)
1178 continue;
1179
1180 ieee80211_set_vif_encap_ops(vsdata);
1181 }
1182 }
1183
ieee80211_recalc_offload(struct ieee80211_local * local)1184 void ieee80211_recalc_offload(struct ieee80211_local *local)
1185 {
1186 struct ieee80211_sub_if_data *sdata;
1187
1188 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1189 return;
1190
1191 lockdep_assert_wiphy(local->hw.wiphy);
1192
1193 list_for_each_entry(sdata, &local->interfaces, list) {
1194 if (!ieee80211_sdata_running(sdata))
1195 continue;
1196
1197 ieee80211_recalc_sdata_offload(sdata);
1198 }
1199 }
1200
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)1201 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1202 const int offset)
1203 {
1204 struct ieee80211_local *local = sdata->local;
1205 u32 flags = sdata->u.mntr.flags;
1206
1207 #define ADJUST(_f, _s) do { \
1208 if (flags & MONITOR_FLAG_##_f) \
1209 local->fif_##_s += offset; \
1210 } while (0)
1211
1212 ADJUST(FCSFAIL, fcsfail);
1213 ADJUST(PLCPFAIL, plcpfail);
1214 ADJUST(CONTROL, control);
1215 ADJUST(CONTROL, pspoll);
1216 ADJUST(OTHER_BSS, other_bss);
1217 if (!(flags & MONITOR_FLAG_SKIP_TX))
1218 local->tx_mntrs += offset;
1219
1220 #undef ADJUST
1221 }
1222
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)1223 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1224 {
1225 struct ieee80211_local *local = sdata->local;
1226 int i;
1227
1228 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1229 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1230 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1231 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1232 sdata->vif.hw_queue[i] = i;
1233 else
1234 sdata->vif.hw_queue[i] = 0;
1235 }
1236 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1237 }
1238
ieee80211_sdata_init(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1239 static void ieee80211_sdata_init(struct ieee80211_local *local,
1240 struct ieee80211_sub_if_data *sdata)
1241 {
1242 sdata->local = local;
1243
1244 INIT_LIST_HEAD(&sdata->key_list);
1245
1246 /*
1247 * Initialize the default link, so we can use link_id 0 for non-MLD,
1248 * and that continues to work for non-MLD-aware drivers that use just
1249 * vif.bss_conf instead of vif.link_conf.
1250 *
1251 * Note that we never change this, so if link ID 0 isn't used in an
1252 * MLD connection, we get a separate allocation for it.
1253 */
1254 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1255 }
1256
ieee80211_add_virtual_monitor(struct ieee80211_local * local,struct ieee80211_sub_if_data * creator_sdata)1257 int ieee80211_add_virtual_monitor(struct ieee80211_local *local,
1258 struct ieee80211_sub_if_data *creator_sdata)
1259 {
1260 struct ieee80211_sub_if_data *sdata;
1261 int ret;
1262
1263 ASSERT_RTNL();
1264 lockdep_assert_wiphy(local->hw.wiphy);
1265
1266 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1267 return 0;
1268
1269 /* Already have a monitor set up, configure it */
1270 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1271 if (sdata)
1272 goto configure_monitor;
1273
1274 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1275 if (!sdata)
1276 return -ENOMEM;
1277
1278 /* set up data */
1279 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1280 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1281 wiphy_name(local->hw.wiphy));
1282 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1283 sdata->wdev.wiphy = local->hw.wiphy;
1284
1285 ieee80211_sdata_init(local, sdata);
1286
1287 ieee80211_set_default_queues(sdata);
1288
1289 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1290 ret = drv_add_interface(local, sdata);
1291 if (WARN_ON(ret)) {
1292 /* ok .. stupid driver, it asked for this! */
1293 kfree(sdata);
1294 return ret;
1295 }
1296 }
1297
1298 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1299 if (ret) {
1300 kfree(sdata);
1301 return ret;
1302 }
1303
1304 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1305
1306 mutex_lock(&local->iflist_mtx);
1307 rcu_assign_pointer(local->monitor_sdata, sdata);
1308 mutex_unlock(&local->iflist_mtx);
1309
1310 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq,
1311 IEEE80211_CHANCTX_EXCLUSIVE);
1312 if (ret) {
1313 mutex_lock(&local->iflist_mtx);
1314 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1315 mutex_unlock(&local->iflist_mtx);
1316 synchronize_net();
1317 drv_remove_interface(local, sdata);
1318 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1319 kfree(sdata);
1320 return ret;
1321 }
1322
1323 skb_queue_head_init(&sdata->skb_queue);
1324 skb_queue_head_init(&sdata->status_queue);
1325 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1326
1327 configure_monitor:
1328 /* Copy in the MU-MIMO configuration if set */
1329 if (!creator_sdata) {
1330 struct ieee80211_sub_if_data *other;
1331
1332 list_for_each_entry_rcu(other, &local->mon_list, u.mntr.list) {
1333 if (!other->vif.bss_conf.mu_mimo_owner)
1334 continue;
1335
1336 creator_sdata = other;
1337 break;
1338 }
1339 }
1340
1341 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) {
1342 sdata->vif.bss_conf.mu_mimo_owner = true;
1343 memcpy(&sdata->vif.bss_conf.mu_group,
1344 &creator_sdata->vif.bss_conf.mu_group,
1345 sizeof(sdata->vif.bss_conf.mu_group));
1346 memcpy(&sdata->u.mntr.mu_follow_addr,
1347 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN);
1348
1349 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1350 BSS_CHANGED_MU_GROUPS);
1351 }
1352
1353 return 0;
1354 }
1355
ieee80211_del_virtual_monitor(struct ieee80211_local * local)1356 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1357 {
1358 struct ieee80211_sub_if_data *sdata;
1359
1360 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1361 return;
1362
1363 ASSERT_RTNL();
1364 lockdep_assert_wiphy(local->hw.wiphy);
1365
1366 mutex_lock(&local->iflist_mtx);
1367
1368 sdata = rcu_dereference_protected(local->monitor_sdata,
1369 lockdep_is_held(&local->iflist_mtx));
1370 if (!sdata) {
1371 mutex_unlock(&local->iflist_mtx);
1372 return;
1373 }
1374
1375 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1376 ieee80211_link_release_channel(&sdata->deflink);
1377
1378 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1379 drv_remove_interface(local, sdata);
1380
1381 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1382 mutex_unlock(&local->iflist_mtx);
1383
1384 synchronize_net();
1385
1386 kfree(sdata);
1387 }
1388
1389 /*
1390 * NOTE: Be very careful when changing this function, it must NOT return
1391 * an error on interface type changes that have been pre-checked, so most
1392 * checks should be in ieee80211_check_concurrent_iface.
1393 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)1394 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1395 {
1396 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1397 struct net_device *dev = wdev->netdev;
1398 struct ieee80211_local *local = sdata->local;
1399 u64 changed = 0;
1400 int res;
1401 u32 hw_reconf_flags = 0;
1402
1403 lockdep_assert_wiphy(local->hw.wiphy);
1404
1405 switch (sdata->vif.type) {
1406 case NL80211_IFTYPE_AP_VLAN: {
1407 struct ieee80211_sub_if_data *master;
1408
1409 if (!sdata->bss)
1410 return -ENOLINK;
1411
1412 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1413
1414 master = container_of(sdata->bss,
1415 struct ieee80211_sub_if_data, u.ap);
1416 sdata->control_port_protocol =
1417 master->control_port_protocol;
1418 sdata->control_port_no_encrypt =
1419 master->control_port_no_encrypt;
1420 sdata->control_port_over_nl80211 =
1421 master->control_port_over_nl80211;
1422 sdata->control_port_no_preauth =
1423 master->control_port_no_preauth;
1424 sdata->vif.cab_queue = master->vif.cab_queue;
1425 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1426 sizeof(sdata->vif.hw_queue));
1427 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1428
1429 sdata->crypto_tx_tailroom_needed_cnt +=
1430 master->crypto_tx_tailroom_needed_cnt;
1431
1432 ieee80211_apvlan_link_setup(sdata);
1433
1434 break;
1435 }
1436 case NL80211_IFTYPE_AP:
1437 case NL80211_IFTYPE_MESH_POINT:
1438 case NL80211_IFTYPE_STATION:
1439 case NL80211_IFTYPE_MONITOR:
1440 case NL80211_IFTYPE_ADHOC:
1441 case NL80211_IFTYPE_P2P_DEVICE:
1442 case NL80211_IFTYPE_OCB:
1443 case NL80211_IFTYPE_NAN:
1444 case NL80211_IFTYPE_PD:
1445 /* no special treatment */
1446 break;
1447 case NL80211_IFTYPE_NAN_DATA:
1448 if (WARN_ON(!rcu_access_pointer(sdata->u.nan_data.nmi)))
1449 return -ENOLINK;
1450 break;
1451 case NL80211_IFTYPE_UNSPECIFIED:
1452 case NUM_NL80211_IFTYPES:
1453 case NL80211_IFTYPE_P2P_CLIENT:
1454 case NL80211_IFTYPE_P2P_GO:
1455 case NL80211_IFTYPE_WDS:
1456 /* cannot happen */
1457 WARN_ON(1);
1458 break;
1459 }
1460
1461 if (local->open_count == 0) {
1462 /* here we can consider everything in good order (again) */
1463 local->reconfig_failure = false;
1464
1465 res = drv_start(local);
1466 if (res) {
1467 /*
1468 * no need to worry about AP_VLAN/NAN_DATA cleanup since
1469 * in that case we can't have open_count == 0
1470 */
1471 return res;
1472 }
1473 ieee80211_led_radio(local, true);
1474 ieee80211_mod_tpt_led_trig(local,
1475 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1476 }
1477
1478 /*
1479 * Copy the hopefully now-present MAC address to
1480 * this interface, if it has the special null one.
1481 */
1482 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1483 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1484 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1485
1486 if (!is_valid_ether_addr(dev->dev_addr)) {
1487 res = -EADDRNOTAVAIL;
1488 goto err_stop;
1489 }
1490 }
1491
1492 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1493 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1494 switch (sdata->vif.type) {
1495 case NL80211_IFTYPE_AP_VLAN:
1496 /* no need to tell driver, but set carrier and chanctx */
1497 if (sdata->bss->active) {
1498 struct ieee80211_link_data *link;
1499
1500 for_each_link_data(sdata, link) {
1501 ieee80211_link_vlan_copy_chanctx(link);
1502 }
1503
1504 netif_carrier_on(dev);
1505 ieee80211_set_vif_encap_ops(sdata);
1506 } else {
1507 netif_carrier_off(dev);
1508 }
1509 break;
1510 case NL80211_IFTYPE_MONITOR:
1511 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1512 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1513 res = drv_add_interface(local, sdata);
1514 if (res)
1515 goto err_stop;
1516 } else {
1517 /* add/configure if there is no non-monitor interface */
1518 if (local->virt_monitors == local->open_count) {
1519 res = ieee80211_add_virtual_monitor(local, sdata);
1520 if (res)
1521 goto err_stop;
1522 }
1523
1524 local->virt_monitors++;
1525
1526 /* must be before the call to ieee80211_configure_filter */
1527 if (local->virt_monitors == 1) {
1528 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1529 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1530 }
1531 }
1532
1533 local->monitors++;
1534
1535 ieee80211_adjust_monitor_flags(sdata, 1);
1536 ieee80211_configure_filter(local);
1537 ieee80211_recalc_offload(local);
1538 ieee80211_recalc_idle(local);
1539
1540 netif_carrier_on(dev);
1541 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1542 break;
1543 case NL80211_IFTYPE_AP:
1544 sdata->bss = &sdata->u.ap;
1545 fallthrough;
1546 default:
1547 if (coming_up) {
1548 ieee80211_del_virtual_monitor(local);
1549 ieee80211_set_sdata_offload_flags(sdata);
1550
1551 res = drv_add_interface(local, sdata);
1552 if (res)
1553 goto err_stop;
1554
1555 ieee80211_set_vif_encap_ops(sdata);
1556 res = ieee80211_check_queues(sdata,
1557 ieee80211_vif_type_p2p(&sdata->vif));
1558 if (res)
1559 goto err_del_interface;
1560 }
1561
1562 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1563 local->fif_pspoll++;
1564 local->fif_probe_req++;
1565
1566 ieee80211_configure_filter(local);
1567 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1568 local->fif_probe_req++;
1569 }
1570
1571 if (sdata->vif.probe_req_reg)
1572 drv_config_iface_filter(local, sdata,
1573 FIF_PROBE_REQ,
1574 FIF_PROBE_REQ);
1575
1576 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1577 sdata->vif.type != NL80211_IFTYPE_NAN &&
1578 sdata->vif.type != NL80211_IFTYPE_PD)
1579 changed |= ieee80211_reset_erp_info(sdata);
1580 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1581 changed);
1582
1583 switch (sdata->vif.type) {
1584 case NL80211_IFTYPE_STATION:
1585 case NL80211_IFTYPE_ADHOC:
1586 case NL80211_IFTYPE_AP:
1587 case NL80211_IFTYPE_MESH_POINT:
1588 case NL80211_IFTYPE_OCB:
1589 case NL80211_IFTYPE_NAN_DATA:
1590 netif_carrier_off(dev);
1591 break;
1592 case NL80211_IFTYPE_P2P_DEVICE:
1593 case NL80211_IFTYPE_NAN:
1594 case NL80211_IFTYPE_PD:
1595 break;
1596 default:
1597 /* not reached */
1598 WARN_ON(1);
1599 }
1600
1601 /*
1602 * Set default queue parameters so drivers don't
1603 * need to initialise the hardware if the hardware
1604 * doesn't start up with sane defaults.
1605 * Enable QoS for anything but station interfaces.
1606 */
1607 ieee80211_set_wmm_default(&sdata->deflink, true,
1608 sdata->vif.type != NL80211_IFTYPE_STATION);
1609 }
1610
1611 /*
1612 * set_multicast_list will be invoked by the networking core
1613 * which will check whether any increments here were done in
1614 * error and sync them down to the hardware as filter flags.
1615 */
1616 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1617 atomic_inc(&local->iff_allmultis);
1618
1619 if (coming_up)
1620 local->open_count++;
1621
1622 if (local->open_count == 1)
1623 ieee80211_hw_conf_init(local);
1624 else if (hw_reconf_flags)
1625 ieee80211_hw_config(local, -1, hw_reconf_flags);
1626
1627 ieee80211_recalc_ps(local);
1628
1629 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1630
1631 return 0;
1632 err_del_interface:
1633 drv_remove_interface(local, sdata);
1634 err_stop:
1635 if (!local->open_count) {
1636 ieee80211_led_radio(local, false);
1637 ieee80211_mod_tpt_led_trig(local, 0,
1638 IEEE80211_TPT_LEDTRIG_FL_RADIO);
1639 drv_stop(local, false);
1640 }
1641 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA)
1642 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL);
1643 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1644 list_del(&sdata->u.vlan.list);
1645 /* Might not be initialized yet, but it is harmless */
1646 sdata->bss = NULL;
1647 return res;
1648 }
1649
ieee80211_if_setup(struct net_device * dev)1650 static void ieee80211_if_setup(struct net_device *dev)
1651 {
1652 ether_setup(dev);
1653 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1654 dev->priv_flags |= IFF_NO_QUEUE;
1655 dev->netdev_ops = &ieee80211_dataif_ops;
1656 dev->needs_free_netdev = true;
1657 }
1658
ieee80211_iface_process_skb(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1659 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1660 struct ieee80211_sub_if_data *sdata,
1661 struct sk_buff *skb)
1662 {
1663 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1664
1665 lockdep_assert_wiphy(local->hw.wiphy);
1666
1667 if (ieee80211_is_action(mgmt->frame_control) &&
1668 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1669 struct sta_info *sta;
1670 int len = skb->len;
1671
1672 sta = sta_info_get_bss(sdata, mgmt->sa);
1673 if (sta) {
1674 switch (mgmt->u.action.action_code) {
1675 case WLAN_ACTION_ADDBA_REQ:
1676 case WLAN_ACTION_NDP_ADDBA_REQ:
1677 ieee80211_process_addba_request(local, sta,
1678 mgmt, len);
1679 break;
1680 case WLAN_ACTION_ADDBA_RESP:
1681 case WLAN_ACTION_NDP_ADDBA_RESP:
1682 ieee80211_process_addba_resp(local, sta,
1683 mgmt, len);
1684 break;
1685 case WLAN_ACTION_DELBA:
1686 case WLAN_ACTION_NDP_DELBA:
1687 ieee80211_process_delba(sdata, sta,
1688 mgmt, len);
1689 break;
1690 default:
1691 WARN_ON(1);
1692 break;
1693 }
1694 }
1695 } else if (ieee80211_is_action(mgmt->frame_control) &&
1696 mgmt->u.action.category == WLAN_CATEGORY_HT) {
1697 switch (mgmt->u.action.action_code) {
1698 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
1699 u8 chanwidth = mgmt->u.action.ht_notify_cw.chanwidth;
1700 struct ieee80211_rx_status *status;
1701 struct link_sta_info *link_sta;
1702 struct sta_info *sta;
1703
1704 sta = sta_info_get_bss(sdata, mgmt->sa);
1705 if (!sta)
1706 break;
1707
1708 status = IEEE80211_SKB_RXCB(skb);
1709 if (!status->link_valid)
1710 link_sta = &sta->deflink;
1711 else
1712 link_sta = rcu_dereference_protected(sta->link[status->link_id],
1713 lockdep_is_held(&local->hw.wiphy->mtx));
1714 if (link_sta)
1715 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta,
1716 link_sta, chanwidth,
1717 status->band);
1718 break;
1719 }
1720 default:
1721 WARN_ON(1);
1722 break;
1723 }
1724 } else if (ieee80211_is_action(mgmt->frame_control) &&
1725 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1726 switch (mgmt->u.action.action_code) {
1727 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1728 struct ieee80211_rx_status *status;
1729 enum nl80211_band band;
1730 struct sta_info *sta;
1731 u8 opmode;
1732
1733 status = IEEE80211_SKB_RXCB(skb);
1734 band = status->band;
1735 opmode = mgmt->u.action.vht_opmode_notif.operating_mode;
1736
1737 sta = sta_info_get_bss(sdata, mgmt->sa);
1738
1739 if (sta)
1740 ieee80211_vht_handle_opmode(sdata,
1741 &sta->deflink,
1742 opmode, band);
1743
1744 break;
1745 }
1746 case WLAN_VHT_ACTION_GROUPID_MGMT:
1747 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1748 mgmt);
1749 break;
1750 default:
1751 WARN_ON(1);
1752 break;
1753 }
1754 } else if (ieee80211_is_action(mgmt->frame_control) &&
1755 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1756 switch (mgmt->u.action.action_code) {
1757 case WLAN_S1G_TWT_TEARDOWN:
1758 case WLAN_S1G_TWT_SETUP:
1759 ieee80211_s1g_rx_twt_action(sdata, skb);
1760 break;
1761 default:
1762 break;
1763 }
1764 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1765 struct ieee80211_hdr *hdr = (void *)mgmt;
1766 struct sta_info *sta;
1767
1768 /*
1769 * So the frame isn't mgmt, but frame_control
1770 * is at the right place anyway, of course, so
1771 * the if statement is correct.
1772 *
1773 * Warn if we have other data frame types here,
1774 * they must not get here.
1775 */
1776 WARN_ON(hdr->frame_control &
1777 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1778 WARN_ON(!(hdr->seq_ctrl &
1779 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1780 /*
1781 * This was a fragment of a frame, received while
1782 * a block-ack session was active. That cannot be
1783 * right, so terminate the session.
1784 */
1785 sta = sta_info_get_bss(sdata, mgmt->sa);
1786 if (sta) {
1787 u16 tid = ieee80211_get_tid(hdr);
1788
1789 __ieee80211_stop_rx_ba_session(
1790 sta, tid, WLAN_BACK_RECIPIENT,
1791 WLAN_REASON_QSTA_REQUIRE_SETUP,
1792 true);
1793 }
1794 } else switch (sdata->vif.type) {
1795 case NL80211_IFTYPE_AP:
1796 ieee80211_ap_rx_queued_frame(sdata, skb);
1797 break;
1798 case NL80211_IFTYPE_STATION:
1799 ieee80211_sta_rx_queued_frame(sdata, skb);
1800 break;
1801 case NL80211_IFTYPE_ADHOC:
1802 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1803 break;
1804 case NL80211_IFTYPE_MESH_POINT:
1805 if (!ieee80211_vif_is_mesh(&sdata->vif))
1806 break;
1807 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1808 break;
1809 default:
1810 WARN(1, "frame for unexpected interface type");
1811 break;
1812 }
1813 }
1814
ieee80211_iface_process_status(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1815 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1816 struct sk_buff *skb)
1817 {
1818 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1819
1820 if (ieee80211_is_action(mgmt->frame_control) &&
1821 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1822 switch (mgmt->u.action.action_code) {
1823 case WLAN_S1G_TWT_TEARDOWN:
1824 case WLAN_S1G_TWT_SETUP:
1825 ieee80211_s1g_status_twt_action(sdata, skb);
1826 break;
1827 default:
1828 break;
1829 }
1830 }
1831 }
1832
ieee80211_iface_work(struct wiphy * wiphy,struct wiphy_work * work)1833 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1834 {
1835 struct ieee80211_sub_if_data *sdata =
1836 container_of(work, struct ieee80211_sub_if_data, work);
1837 struct ieee80211_local *local = sdata->local;
1838 struct sk_buff *skb;
1839
1840 if (!ieee80211_sdata_running(sdata))
1841 return;
1842
1843 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1844 return;
1845
1846 if (!ieee80211_can_run_worker(local))
1847 return;
1848
1849 /* first process frames */
1850 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1851 kcov_remote_start_common(skb_get_kcov_handle(skb));
1852
1853 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1854 ieee80211_process_tdls_channel_switch(sdata, skb);
1855 else
1856 ieee80211_iface_process_skb(local, sdata, skb);
1857
1858 consume_skb(skb);
1859 kcov_remote_stop();
1860 }
1861
1862 /* process status queue */
1863 while ((skb = skb_dequeue(&sdata->status_queue))) {
1864 kcov_remote_start_common(skb_get_kcov_handle(skb));
1865
1866 ieee80211_iface_process_status(sdata, skb);
1867 consume_skb(skb);
1868
1869 kcov_remote_stop();
1870 }
1871
1872 /* then other type-dependent work */
1873 switch (sdata->vif.type) {
1874 case NL80211_IFTYPE_STATION:
1875 ieee80211_sta_work(sdata);
1876 break;
1877 case NL80211_IFTYPE_ADHOC:
1878 ieee80211_ibss_work(sdata);
1879 break;
1880 case NL80211_IFTYPE_MESH_POINT:
1881 if (!ieee80211_vif_is_mesh(&sdata->vif))
1882 break;
1883 ieee80211_mesh_work(sdata);
1884 break;
1885 case NL80211_IFTYPE_OCB:
1886 ieee80211_ocb_work(sdata);
1887 break;
1888 default:
1889 break;
1890 }
1891 }
1892
ieee80211_activate_links_work(struct wiphy * wiphy,struct wiphy_work * work)1893 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1894 struct wiphy_work *work)
1895 {
1896 struct ieee80211_sub_if_data *sdata =
1897 container_of(work, struct ieee80211_sub_if_data,
1898 activate_links_work);
1899 struct ieee80211_local *local = wiphy_priv(wiphy);
1900
1901 if (local->in_reconfig)
1902 return;
1903
1904 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1905 sdata->desired_active_links = 0;
1906 }
1907
1908 /*
1909 * Helper function to initialise an interface to a specific type.
1910 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1911 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1912 enum nl80211_iftype type)
1913 {
1914 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1915 0xff, 0xff, 0xff};
1916
1917 /* clear type-dependent unions */
1918 memset(&sdata->u, 0, sizeof(sdata->u));
1919 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1920
1921 /* and set some type-dependent values */
1922 sdata->vif.type = type;
1923 sdata->vif.p2p = false;
1924 sdata->wdev.iftype = type;
1925
1926 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1927 sdata->control_port_no_encrypt = false;
1928 sdata->control_port_over_nl80211 = false;
1929 sdata->control_port_no_preauth = false;
1930 sdata->vif.cfg.idle = true;
1931 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1932
1933 sdata->noack_map = 0;
1934
1935 /* only monitor/p2p-device differ */
1936 if (sdata->dev) {
1937 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1938 sdata->dev->type = ARPHRD_ETHER;
1939 }
1940
1941 skb_queue_head_init(&sdata->skb_queue);
1942 skb_queue_head_init(&sdata->status_queue);
1943 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1944 wiphy_work_init(&sdata->activate_links_work,
1945 ieee80211_activate_links_work);
1946
1947 switch (type) {
1948 case NL80211_IFTYPE_P2P_GO:
1949 type = NL80211_IFTYPE_AP;
1950 sdata->vif.type = type;
1951 sdata->vif.p2p = true;
1952 fallthrough;
1953 case NL80211_IFTYPE_AP:
1954 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1955 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1956 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1957 break;
1958 case NL80211_IFTYPE_P2P_CLIENT:
1959 type = NL80211_IFTYPE_STATION;
1960 sdata->vif.type = type;
1961 sdata->vif.p2p = true;
1962 fallthrough;
1963 case NL80211_IFTYPE_STATION:
1964 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1965 ieee80211_sta_setup_sdata(sdata);
1966 break;
1967 case NL80211_IFTYPE_OCB:
1968 sdata->vif.bss_conf.bssid = bssid_wildcard;
1969 ieee80211_ocb_setup_sdata(sdata);
1970 break;
1971 case NL80211_IFTYPE_ADHOC:
1972 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1973 ieee80211_ibss_setup_sdata(sdata);
1974 break;
1975 case NL80211_IFTYPE_MESH_POINT:
1976 if (ieee80211_vif_is_mesh(&sdata->vif))
1977 ieee80211_mesh_init_sdata(sdata);
1978 break;
1979 case NL80211_IFTYPE_MONITOR:
1980 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1981 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1982 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1983 MONITOR_FLAG_OTHER_BSS;
1984 break;
1985 case NL80211_IFTYPE_NAN:
1986 if (!(sdata->local->hw.wiphy->nan_capa.flags &
1987 WIPHY_NAN_FLAGS_USERSPACE_DE)) {
1988 idr_init(&sdata->u.nan.de.function_inst_ids);
1989 spin_lock_init(&sdata->u.nan.de.func_lock);
1990 }
1991 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1992 break;
1993 case NL80211_IFTYPE_AP_VLAN:
1994 case NL80211_IFTYPE_P2P_DEVICE:
1995 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1996 break;
1997 case NL80211_IFTYPE_NAN_DATA:
1998 case NL80211_IFTYPE_PD:
1999 break;
2000 case NL80211_IFTYPE_UNSPECIFIED:
2001 case NL80211_IFTYPE_WDS:
2002 case NUM_NL80211_IFTYPES:
2003 WARN_ON(1);
2004 break;
2005 }
2006
2007 /* need to do this after the switch so vif.type is correct */
2008 ieee80211_link_setup(&sdata->deflink);
2009
2010 ieee80211_debugfs_recreate_netdev(sdata, false);
2011 }
2012
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)2013 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
2014 enum nl80211_iftype type)
2015 {
2016 struct ieee80211_local *local = sdata->local;
2017 int ret, err;
2018 enum nl80211_iftype internal_type = type;
2019 bool p2p = false;
2020
2021 ASSERT_RTNL();
2022
2023 if (!local->ops->change_interface)
2024 return -EBUSY;
2025
2026 /* for now, don't support changing while links exist */
2027 if (ieee80211_vif_is_mld(&sdata->vif))
2028 return -EBUSY;
2029
2030 switch (sdata->vif.type) {
2031 case NL80211_IFTYPE_AP:
2032 if (!list_empty(&sdata->u.ap.vlans))
2033 return -EBUSY;
2034 break;
2035 case NL80211_IFTYPE_STATION:
2036 case NL80211_IFTYPE_ADHOC:
2037 case NL80211_IFTYPE_OCB:
2038 /*
2039 * Could maybe also all others here?
2040 * Just not sure how that interacts
2041 * with the RX/config path e.g. for
2042 * mesh.
2043 */
2044 break;
2045 default:
2046 return -EBUSY;
2047 }
2048
2049 switch (type) {
2050 case NL80211_IFTYPE_AP:
2051 case NL80211_IFTYPE_STATION:
2052 case NL80211_IFTYPE_ADHOC:
2053 case NL80211_IFTYPE_OCB:
2054 /*
2055 * Could probably support everything
2056 * but here.
2057 */
2058 break;
2059 case NL80211_IFTYPE_P2P_CLIENT:
2060 p2p = true;
2061 internal_type = NL80211_IFTYPE_STATION;
2062 break;
2063 case NL80211_IFTYPE_P2P_GO:
2064 p2p = true;
2065 internal_type = NL80211_IFTYPE_AP;
2066 break;
2067 default:
2068 return -EBUSY;
2069 }
2070
2071 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
2072 if (ret)
2073 return ret;
2074
2075 ieee80211_stop_vif_queues(local, sdata,
2076 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
2077 /* do_stop will synchronize_rcu() first thing */
2078 ieee80211_do_stop(sdata, false);
2079
2080 ieee80211_teardown_sdata(sdata);
2081
2082 ieee80211_set_sdata_offload_flags(sdata);
2083 ret = drv_change_interface(local, sdata, internal_type, p2p);
2084 if (ret)
2085 type = ieee80211_vif_type_p2p(&sdata->vif);
2086
2087 /*
2088 * Ignore return value here, there's not much we can do since
2089 * the driver changed the interface type internally already.
2090 * The warnings will hopefully make driver authors fix it :-)
2091 */
2092 ieee80211_check_queues(sdata, type);
2093
2094 ieee80211_setup_sdata(sdata, type);
2095 ieee80211_set_vif_encap_ops(sdata);
2096
2097 err = ieee80211_do_open(&sdata->wdev, false);
2098 WARN(err, "type change: do_open returned %d", err);
2099
2100 ieee80211_wake_vif_queues(local, sdata,
2101 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
2102 return ret;
2103 }
2104
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)2105 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
2106 enum nl80211_iftype type)
2107 {
2108 int ret;
2109
2110 ASSERT_RTNL();
2111
2112 if (type == ieee80211_vif_type_p2p(&sdata->vif))
2113 return 0;
2114
2115 if (ieee80211_sdata_running(sdata)) {
2116 ret = ieee80211_runtime_change_iftype(sdata, type);
2117 if (ret)
2118 return ret;
2119 } else {
2120 /* Purge and reset type-dependent state. */
2121 ieee80211_teardown_sdata(sdata);
2122 ieee80211_setup_sdata(sdata, type);
2123 }
2124
2125 /* reset some values that shouldn't be kept across type changes */
2126 if (type == NL80211_IFTYPE_STATION)
2127 sdata->u.mgd.use_4addr = false;
2128
2129 return 0;
2130 }
2131
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)2132 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
2133 u8 *perm_addr, enum nl80211_iftype type)
2134 {
2135 struct ieee80211_sub_if_data *sdata;
2136 u64 mask, start, addr, val, inc;
2137 u8 *m;
2138 u8 tmp_addr[ETH_ALEN];
2139 int i;
2140
2141 lockdep_assert_wiphy(local->hw.wiphy);
2142
2143 /* default ... something at least */
2144 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
2145
2146 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
2147 local->hw.wiphy->n_addresses <= 1)
2148 return;
2149
2150 switch (type) {
2151 case NL80211_IFTYPE_MONITOR:
2152 /* doesn't matter */
2153 break;
2154 case NL80211_IFTYPE_AP_VLAN:
2155 /* match up with an AP interface */
2156 list_for_each_entry(sdata, &local->interfaces, list) {
2157 if (sdata->vif.type != NL80211_IFTYPE_AP)
2158 continue;
2159 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2160 break;
2161 }
2162 /* keep default if no AP interface present */
2163 break;
2164 case NL80211_IFTYPE_P2P_CLIENT:
2165 case NL80211_IFTYPE_P2P_GO:
2166 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
2167 list_for_each_entry(sdata, &local->interfaces, list) {
2168 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
2169 continue;
2170 if (!ieee80211_sdata_running(sdata))
2171 continue;
2172 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2173 return;
2174 }
2175 }
2176 fallthrough;
2177 default:
2178 /* assign a new address if possible -- try n_addresses first */
2179 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2180 bool used = false;
2181
2182 list_for_each_entry(sdata, &local->interfaces, list) {
2183 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2184 sdata->vif.addr)) {
2185 used = true;
2186 break;
2187 }
2188 }
2189
2190 if (!used) {
2191 memcpy(perm_addr,
2192 local->hw.wiphy->addresses[i].addr,
2193 ETH_ALEN);
2194 break;
2195 }
2196 }
2197
2198 /* try mask if available */
2199 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2200 break;
2201
2202 m = local->hw.wiphy->addr_mask;
2203 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2204 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2205 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2206
2207 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2208 /* not a contiguous mask ... not handled now! */
2209 pr_info("not contiguous\n");
2210 break;
2211 }
2212
2213 /*
2214 * Pick address of existing interface in case user changed
2215 * MAC address manually, default to perm_addr.
2216 */
2217 m = local->hw.wiphy->perm_addr;
2218 list_for_each_entry(sdata, &local->interfaces, list) {
2219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2220 continue;
2221 m = sdata->vif.addr;
2222 break;
2223 }
2224 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2225 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2226 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2227
2228 inc = 1ULL<<__ffs64(mask);
2229 val = (start & mask);
2230 addr = (start & ~mask) | (val & mask);
2231 do {
2232 bool used = false;
2233
2234 tmp_addr[5] = addr >> 0*8;
2235 tmp_addr[4] = addr >> 1*8;
2236 tmp_addr[3] = addr >> 2*8;
2237 tmp_addr[2] = addr >> 3*8;
2238 tmp_addr[1] = addr >> 4*8;
2239 tmp_addr[0] = addr >> 5*8;
2240
2241 val += inc;
2242
2243 list_for_each_entry(sdata, &local->interfaces, list) {
2244 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2245 used = true;
2246 break;
2247 }
2248 }
2249
2250 if (!used) {
2251 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2252 break;
2253 }
2254 addr = (start & ~mask) | (val & mask);
2255 } while (addr != start);
2256
2257 break;
2258 }
2259 }
2260
ieee80211_if_add(struct ieee80211_local * local,const char * name,unsigned char name_assign_type,struct wireless_dev ** new_wdev,enum nl80211_iftype type,struct vif_params * params)2261 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2262 unsigned char name_assign_type,
2263 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2264 struct vif_params *params)
2265 {
2266 struct net_device *ndev = NULL;
2267 struct ieee80211_sub_if_data *sdata = NULL;
2268 struct txq_info *txqi;
2269 int ret, i;
2270
2271 ASSERT_RTNL();
2272 lockdep_assert_wiphy(local->hw.wiphy);
2273
2274 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2275 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2276 sizeof(void *));
2277 struct wireless_dev *wdev;
2278 int txq_size = 0;
2279
2280 if (type == NL80211_IFTYPE_NAN)
2281 txq_size = sizeof(struct txq_info) +
2282 local->hw.txq_data_size;
2283
2284 sdata = kzalloc(size + txq_size, GFP_KERNEL);
2285 if (!sdata)
2286 return -ENOMEM;
2287 wdev = &sdata->wdev;
2288
2289 sdata->dev = NULL;
2290 strscpy(sdata->name, name, IFNAMSIZ);
2291
2292 if (is_valid_ether_addr(params->macaddr))
2293 memcpy(wdev->address, params->macaddr, ETH_ALEN);
2294 else
2295 ieee80211_assign_perm_addr(local, wdev->address, type);
2296
2297 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2298 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2299
2300 /*
2301 * Add a management TXQ for NAN devices which includes frames
2302 * that will only be transmitted during discovery windows (DWs)
2303 */
2304 if (type == NL80211_IFTYPE_NAN) {
2305 txqi = (struct txq_info *)((unsigned long)sdata + size);
2306 ieee80211_txq_init(sdata, NULL, txqi,
2307 IEEE80211_NUM_TIDS);
2308 }
2309 } else {
2310 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2311 sizeof(void *));
2312 int txq_size = 0;
2313
2314 if (type != NL80211_IFTYPE_AP_VLAN &&
2315 (type != NL80211_IFTYPE_MONITOR ||
2316 (params->flags & MONITOR_FLAG_ACTIVE)))
2317 txq_size += sizeof(struct txq_info) +
2318 local->hw.txq_data_size;
2319
2320 ndev = alloc_netdev_mqs(size + txq_size,
2321 name, name_assign_type,
2322 ieee80211_if_setup, 1, 1);
2323 if (!ndev)
2324 return -ENOMEM;
2325
2326 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2327
2328 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2329
2330 ndev->needed_headroom = local->tx_headroom +
2331 4*6 /* four MAC addresses */
2332 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2333 + 6 /* mesh */
2334 + 8 /* rfc1042/bridge tunnel */
2335 - ETH_HLEN /* ethernet hard_header_len */
2336 + IEEE80211_ENCRYPT_HEADROOM;
2337 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2338
2339 ret = dev_alloc_name(ndev, ndev->name);
2340 if (ret < 0) {
2341 free_netdev(ndev);
2342 return ret;
2343 }
2344
2345 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2346 if (is_valid_ether_addr(params->macaddr))
2347 eth_hw_addr_set(ndev, params->macaddr);
2348 else
2349 eth_hw_addr_set(ndev, ndev->perm_addr);
2350 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2351
2352 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2353 sdata = netdev_priv(ndev);
2354 ndev->ieee80211_ptr = &sdata->wdev;
2355 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2356 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2357 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2358
2359 if (txq_size) {
2360 txqi = netdev_priv(ndev) + size;
2361 ieee80211_txq_init(sdata, NULL, txqi, 0);
2362 }
2363
2364 sdata->dev = ndev;
2365 }
2366
2367 /* initialise type-independent data */
2368 sdata->wdev.wiphy = local->hw.wiphy;
2369
2370 ieee80211_sdata_init(local, sdata);
2371
2372 ieee80211_init_frag_cache(&sdata->frags);
2373
2374 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2375 ieee80211_delayed_tailroom_dec);
2376
2377 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2378 struct ieee80211_supported_band *sband;
2379 sband = local->hw.wiphy->bands[i];
2380 sdata->rc_rateidx_mask[i] =
2381 sband ? (1 << sband->n_bitrates) - 1 : 0;
2382 if (sband) {
2383 __le16 cap;
2384 u16 *vht_rate_mask;
2385
2386 memcpy(sdata->rc_rateidx_mcs_mask[i],
2387 sband->ht_cap.mcs.rx_mask,
2388 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2389
2390 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2391 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2392 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2393 } else {
2394 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2395 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2396 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2397 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2398 }
2399 }
2400
2401 ieee80211_set_default_queues(sdata);
2402
2403 /* setup type-dependent data */
2404 ieee80211_setup_sdata(sdata, type);
2405
2406 if (ndev) {
2407 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2408 if (type == NL80211_IFTYPE_STATION)
2409 sdata->u.mgd.use_4addr = params->use_4addr;
2410
2411 ndev->features |= local->hw.netdev_features;
2412 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2413 ndev->hw_features |= ndev->features &
2414 MAC80211_SUPPORTED_FEATURES_TX;
2415 sdata->vif.netdev_features = local->hw.netdev_features;
2416
2417 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2418
2419 /* MTU range is normally 256 - 2304, where the upper limit is
2420 * the maximum MSDU size. Monitor interfaces send and receive
2421 * MPDU and A-MSDU frames which may be much larger so we do
2422 * not impose an upper limit in that case.
2423 */
2424 ndev->min_mtu = 256;
2425 if (type == NL80211_IFTYPE_MONITOR)
2426 ndev->max_mtu = 0;
2427 else
2428 ndev->max_mtu = local->hw.max_mtu;
2429
2430 ret = cfg80211_register_netdevice(ndev);
2431 if (ret) {
2432 free_netdev(ndev);
2433 return ret;
2434 }
2435 }
2436
2437 mutex_lock(&local->iflist_mtx);
2438 list_add_tail_rcu(&sdata->list, &local->interfaces);
2439 mutex_unlock(&local->iflist_mtx);
2440
2441 if (new_wdev)
2442 *new_wdev = &sdata->wdev;
2443
2444 return 0;
2445 }
2446
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)2447 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2448 {
2449 ASSERT_RTNL();
2450 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2451
2452 mutex_lock(&sdata->local->iflist_mtx);
2453 list_del_rcu(&sdata->list);
2454 mutex_unlock(&sdata->local->iflist_mtx);
2455
2456 if (sdata->vif.txq)
2457 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2458
2459 if (sdata->vif.txq_mgmt)
2460 ieee80211_txq_purge(sdata->local,
2461 to_txq_info(sdata->vif.txq_mgmt));
2462
2463 synchronize_rcu();
2464
2465 cfg80211_unregister_wdev(&sdata->wdev);
2466
2467 if (!sdata->dev) {
2468 ieee80211_teardown_sdata(sdata);
2469 kfree(sdata);
2470 }
2471 }
2472
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2473 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2474 {
2475 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2476 return;
2477 ieee80211_do_stop(sdata, true);
2478 }
2479
ieee80211_remove_interfaces(struct ieee80211_local * local)2480 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2481 {
2482 struct ieee80211_sub_if_data *sdata, *tmp;
2483 LIST_HEAD(unreg_list);
2484
2485 ASSERT_RTNL();
2486
2487 /* Before destroying the interfaces, make sure they're all stopped so
2488 * that the hardware is stopped. Otherwise, the driver might still be
2489 * iterating the interfaces during the shutdown, e.g. from a worker
2490 * or from RX processing or similar, and if it does so (using atomic
2491 * iteration) while we're manipulating the list, the iteration will
2492 * crash.
2493 *
2494 * After this, the hardware should be stopped and the driver should
2495 * have stopped all of its activities, so that we can do RCU-unaware
2496 * manipulations of the interface list below.
2497 */
2498 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2499
2500 guard(wiphy)(local->hw.wiphy);
2501
2502 WARN(local->open_count, "%s: open count remains %d\n",
2503 wiphy_name(local->hw.wiphy), local->open_count);
2504
2505 mutex_lock(&local->iflist_mtx);
2506 list_splice_init(&local->interfaces, &unreg_list);
2507 mutex_unlock(&local->iflist_mtx);
2508
2509 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2510 bool netdev = sdata->dev;
2511
2512 /*
2513 * Remove IP addresses explicitly, since the notifier will
2514 * skip the callbacks if wdev->registered is false, since
2515 * we can't acquire the wiphy_lock() again there if already
2516 * inside this locked section.
2517 */
2518 sdata->vif.cfg.arp_addr_cnt = 0;
2519 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2520 sdata->u.mgd.associated)
2521 ieee80211_vif_cfg_change_notify(sdata,
2522 BSS_CHANGED_ARP_FILTER);
2523
2524 list_del(&sdata->list);
2525 cfg80211_unregister_wdev(&sdata->wdev);
2526
2527 if (!netdev)
2528 kfree(sdata);
2529 }
2530 }
2531
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2532 static int netdev_notify(struct notifier_block *nb,
2533 unsigned long state, void *ptr)
2534 {
2535 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2536 struct ieee80211_sub_if_data *sdata;
2537
2538 if (state != NETDEV_CHANGENAME)
2539 return NOTIFY_DONE;
2540
2541 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2542 return NOTIFY_DONE;
2543
2544 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2545 return NOTIFY_DONE;
2546
2547 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2548 memcpy(sdata->name, dev->name, IFNAMSIZ);
2549 ieee80211_debugfs_rename_netdev(sdata);
2550
2551 return NOTIFY_OK;
2552 }
2553
2554 static struct notifier_block mac80211_netdev_notifier = {
2555 .notifier_call = netdev_notify,
2556 };
2557
ieee80211_iface_init(void)2558 int ieee80211_iface_init(void)
2559 {
2560 return register_netdevice_notifier(&mac80211_netdev_notifier);
2561 }
2562
ieee80211_iface_exit(void)2563 void ieee80211_iface_exit(void)
2564 {
2565 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2566 }
2567
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2568 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2569 {
2570 if (sdata->vif.type == NL80211_IFTYPE_AP)
2571 atomic_inc(&sdata->u.ap.num_mcast_sta);
2572 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2573 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2574 }
2575
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2576 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2577 {
2578 if (sdata->vif.type == NL80211_IFTYPE_AP)
2579 atomic_dec(&sdata->u.ap.num_mcast_sta);
2580 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2581 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2582 }
2583
ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data * sdata)2584 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2585 {
2586 struct ieee80211_local *local = sdata->local;
2587
2588 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2589 return;
2590
2591 ieee80211_stop_vif_queues_norefcount(local, sdata,
2592 IEEE80211_QUEUE_STOP_REASON_CSA);
2593 }
2594
ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data * sdata)2595 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2596 {
2597 struct ieee80211_local *local = sdata->local;
2598
2599 ieee80211_wake_vif_queues_norefcount(local, sdata,
2600 IEEE80211_QUEUE_STOP_REASON_CSA);
2601 }
2602