1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2025 Intel Corporation
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/dropreason.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "debugfs.h"
36
ieee80211_configure_filter(struct ieee80211_local * local)37 void ieee80211_configure_filter(struct ieee80211_local *local)
38 {
39 u64 mc;
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
42
43 if (atomic_read(&local->iff_allmultis))
44 new_flags |= FIF_ALLMULTI;
45
46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
48 new_flags |= FIF_BCN_PRBRESP_PROMISC;
49
50 if (local->fif_probe_req || local->probe_req_reg)
51 new_flags |= FIF_PROBE_REQ;
52
53 if (local->fif_fcsfail)
54 new_flags |= FIF_FCSFAIL;
55
56 if (local->fif_plcpfail)
57 new_flags |= FIF_PLCPFAIL;
58
59 if (local->fif_control)
60 new_flags |= FIF_CONTROL;
61
62 if (local->fif_other_bss)
63 new_flags |= FIF_OTHER_BSS;
64
65 if (local->fif_pspoll)
66 new_flags |= FIF_PSPOLL;
67
68 if (local->rx_mcast_action_reg)
69 new_flags |= FIF_MCAST_ACTION;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
ieee80211_reconfig_filter(struct wiphy * wiphy,struct wiphy_work * work)87 static void ieee80211_reconfig_filter(struct wiphy *wiphy,
88 struct wiphy_work *work)
89 {
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
92
93 ieee80211_configure_filter(local);
94 }
95
ieee80211_calc_hw_conf_chan(struct ieee80211_local * local,struct ieee80211_chanctx_conf * ctx)96 static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local,
97 struct ieee80211_chanctx_conf *ctx)
98 {
99 struct ieee80211_sub_if_data *sdata;
100 struct cfg80211_chan_def chandef = {};
101 struct cfg80211_chan_def *oper = NULL;
102 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC;
103 u32 changed = 0;
104 int power;
105 u32 offchannel_flag;
106
107 if (!local->emulate_chanctx)
108 return 0;
109
110 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
111
112 if (ctx && !WARN_ON(!ctx->def.chan)) {
113 oper = &ctx->def;
114 if (ctx->rx_chains_static > 1)
115 smps_mode = IEEE80211_SMPS_OFF;
116 else if (ctx->rx_chains_dynamic > 1)
117 smps_mode = IEEE80211_SMPS_DYNAMIC;
118 else
119 smps_mode = IEEE80211_SMPS_STATIC;
120 }
121
122 if (local->scan_chandef.chan) {
123 chandef = local->scan_chandef;
124 } else if (local->tmp_channel) {
125 chandef.chan = local->tmp_channel;
126 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
127 chandef.center_freq1 = chandef.chan->center_freq;
128 chandef.freq1_offset = chandef.chan->freq_offset;
129 } else if (oper) {
130 chandef = *oper;
131 } else {
132 chandef = local->dflt_chandef;
133 }
134
135 if (WARN(!cfg80211_chandef_valid(&chandef),
136 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
137 chandef.chan ? chandef.chan->center_freq : -1,
138 chandef.chan ? chandef.chan->freq_offset : 0,
139 chandef.width, chandef.center_freq1, chandef.freq1_offset,
140 chandef.center_freq2))
141 return 0;
142
143 if (!oper || !cfg80211_chandef_identical(&chandef, oper))
144 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
145 else
146 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
147
148 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
149
150 /* force it also for scanning, since drivers might config differently */
151 if (offchannel_flag || local->scanning || local->in_reconfig ||
152 !cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) {
153 local->hw.conf.chandef = chandef;
154 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
155 }
156
157 if (!conf_is_ht(&local->hw.conf)) {
158 /*
159 * mac80211.h documents that this is only valid
160 * when the channel is set to an HT type, and
161 * that otherwise STATIC is used.
162 */
163 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
164 } else if (local->hw.conf.smps_mode != smps_mode) {
165 local->hw.conf.smps_mode = smps_mode;
166 changed |= IEEE80211_CONF_CHANGE_SMPS;
167 }
168
169 power = ieee80211_chandef_max_power(&chandef);
170 if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
171 power = min(local->user_power_level, power);
172
173 rcu_read_lock();
174 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
175 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
176 continue;
177 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
178 continue;
179 if (sdata->vif.bss_conf.txpower == INT_MIN)
180 continue;
181 power = min(power, sdata->vif.bss_conf.txpower);
182 }
183 rcu_read_unlock();
184
185 if (local->hw.conf.power_level != power) {
186 changed |= IEEE80211_CONF_CHANGE_POWER;
187 local->hw.conf.power_level = power;
188 }
189
190 return changed;
191 }
192
ieee80211_hw_config(struct ieee80211_local * local,int radio_idx,u32 changed)193 int ieee80211_hw_config(struct ieee80211_local *local, int radio_idx,
194 u32 changed)
195 {
196 int ret = 0;
197
198 might_sleep();
199
200 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
201 IEEE80211_CONF_CHANGE_POWER |
202 IEEE80211_CONF_CHANGE_SMPS));
203
204 if (changed && local->open_count) {
205 ret = drv_config(local, radio_idx, changed);
206 /*
207 * Goal:
208 * HW reconfiguration should never fail, the driver has told
209 * us what it can support so it should live up to that promise.
210 *
211 * Current status:
212 * rfkill is not integrated with mac80211 and a
213 * configuration command can thus fail if hardware rfkill
214 * is enabled
215 *
216 * FIXME: integrate rfkill with mac80211 and then add this
217 * WARN_ON() back
218 *
219 */
220 /* WARN_ON(ret); */
221 }
222
223 return ret;
224 }
225
226 /* for scanning, offchannel and chanctx emulation only */
_ieee80211_hw_conf_chan(struct ieee80211_local * local,struct ieee80211_chanctx_conf * ctx)227 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
228 struct ieee80211_chanctx_conf *ctx)
229 {
230 u32 changed;
231
232 if (!local->open_count)
233 return 0;
234
235 changed = ieee80211_calc_hw_conf_chan(local, ctx);
236 if (!changed)
237 return 0;
238
239 return drv_config(local, -1, changed);
240 }
241
ieee80211_hw_conf_chan(struct ieee80211_local * local)242 int ieee80211_hw_conf_chan(struct ieee80211_local *local)
243 {
244 struct ieee80211_chanctx *ctx;
245
246 ctx = list_first_entry_or_null(&local->chanctx_list,
247 struct ieee80211_chanctx,
248 list);
249
250 return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL);
251 }
252
ieee80211_hw_conf_init(struct ieee80211_local * local)253 void ieee80211_hw_conf_init(struct ieee80211_local *local)
254 {
255 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
256 IEEE80211_CONF_CHANGE_POWER |
257 IEEE80211_CONF_CHANGE_SMPS);
258
259 if (WARN_ON(!local->open_count))
260 return;
261
262 if (local->emulate_chanctx) {
263 struct ieee80211_chanctx *ctx;
264
265 ctx = list_first_entry_or_null(&local->chanctx_list,
266 struct ieee80211_chanctx,
267 list);
268
269 changed |= ieee80211_calc_hw_conf_chan(local,
270 ctx ? &ctx->conf : NULL);
271 }
272
273 WARN_ON(drv_config(local, -1, changed));
274 }
275
ieee80211_emulate_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)276 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
277 struct ieee80211_chanctx_conf *ctx)
278 {
279 struct ieee80211_local *local = hw_to_local(hw);
280
281 local->hw.conf.radar_enabled = ctx->radar_enabled;
282
283 return _ieee80211_hw_conf_chan(local, ctx);
284 }
285 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
286
ieee80211_emulate_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)287 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
288 struct ieee80211_chanctx_conf *ctx)
289 {
290 struct ieee80211_local *local = hw_to_local(hw);
291
292 local->hw.conf.radar_enabled = false;
293
294 _ieee80211_hw_conf_chan(local, NULL);
295 }
296 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
297
ieee80211_emulate_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx,u32 changed)298 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
299 struct ieee80211_chanctx_conf *ctx,
300 u32 changed)
301 {
302 struct ieee80211_local *local = hw_to_local(hw);
303
304 local->hw.conf.radar_enabled = ctx->radar_enabled;
305
306 _ieee80211_hw_conf_chan(local, ctx);
307 }
308 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
309
ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif_chanctx_switch * vifs,int n_vifs,enum ieee80211_chanctx_switch_mode mode)310 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
311 struct ieee80211_vif_chanctx_switch *vifs,
312 int n_vifs,
313 enum ieee80211_chanctx_switch_mode mode)
314 {
315 struct ieee80211_local *local = hw_to_local(hw);
316
317 if (n_vifs <= 0)
318 return -EINVAL;
319
320 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
321 _ieee80211_hw_conf_chan(local, vifs[0].new_ctx);
322
323 return 0;
324 }
325 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
326
327 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
328 BSS_CHANGED_IDLE |\
329 BSS_CHANGED_PS |\
330 BSS_CHANGED_IBSS |\
331 BSS_CHANGED_ARP_FILTER |\
332 BSS_CHANGED_SSID |\
333 BSS_CHANGED_MLD_VALID_LINKS |\
334 BSS_CHANGED_MLD_TTLM)
335
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)336 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
337 u64 changed)
338 {
339 struct ieee80211_local *local = sdata->local;
340
341 might_sleep();
342
343 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif));
344
345 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
346 return;
347
348 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
349 BSS_CHANGED_BEACON_ENABLED) &&
350 sdata->vif.type != NL80211_IFTYPE_AP &&
351 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
352 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
353 sdata->vif.type != NL80211_IFTYPE_OCB))
354 return;
355
356 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
357 sdata->vif.type == NL80211_IFTYPE_NAN ||
358 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
359 !sdata->vif.bss_conf.mu_mimo_owner &&
360 !(changed & BSS_CHANGED_TXPOWER))))
361 return;
362
363 if (!check_sdata_in_driver(sdata))
364 return;
365
366 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
367 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
368
369 trace_drv_vif_cfg_changed(local, sdata, changed);
370 if (local->ops->vif_cfg_changed)
371 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
372 }
373
374 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
375 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
376
377 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
378 changed);
379 if (local->ops->link_info_changed)
380 local->ops->link_info_changed(&local->hw, &sdata->vif,
381 &sdata->vif.bss_conf, ch);
382 }
383
384 if (local->ops->bss_info_changed)
385 local->ops->bss_info_changed(&local->hw, &sdata->vif,
386 &sdata->vif.bss_conf, changed);
387 trace_drv_return_void(local);
388 }
389
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)390 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
391 u64 changed)
392 {
393 struct ieee80211_local *local = sdata->local;
394
395 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
396
397 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
398 return;
399
400 drv_vif_cfg_changed(local, sdata, changed);
401 }
402
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)403 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
404 struct ieee80211_link_data *link,
405 u64 changed)
406 {
407 struct ieee80211_local *local = sdata->local;
408
409 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
410
411 if (!changed)
412 return;
413
414 switch (sdata->vif.type) {
415 case NL80211_IFTYPE_AP_VLAN:
416 return;
417 case NL80211_IFTYPE_MONITOR:
418 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
419 return;
420 break;
421 default:
422 break;
423 }
424
425 if (!check_sdata_in_driver(sdata))
426 return;
427
428 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
429 }
430
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)431 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
432 {
433 sdata->vif.bss_conf.use_cts_prot = false;
434 sdata->vif.bss_conf.use_short_preamble = false;
435 sdata->vif.bss_conf.use_short_slot = false;
436 return BSS_CHANGED_ERP_CTS_PROT |
437 BSS_CHANGED_ERP_PREAMBLE |
438 BSS_CHANGED_ERP_SLOT;
439 }
440
441 /* context: requires softirqs disabled */
ieee80211_handle_queued_frames(struct ieee80211_local * local)442 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
443 {
444 struct sk_buff *skb;
445
446 while ((skb = skb_dequeue(&local->skb_queue)) ||
447 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
448 switch (skb->pkt_type) {
449 case IEEE80211_RX_MSG:
450 /* Clear skb->pkt_type in order to not confuse kernel
451 * netstack. */
452 skb->pkt_type = 0;
453 ieee80211_rx(&local->hw, skb);
454 break;
455 case IEEE80211_TX_STATUS_MSG:
456 skb->pkt_type = 0;
457 ieee80211_tx_status_skb(&local->hw, skb);
458 break;
459 default:
460 WARN(1, "mac80211: Packet is of unknown type %d\n",
461 skb->pkt_type);
462 dev_kfree_skb(skb);
463 break;
464 }
465 }
466 }
467
ieee80211_tasklet_handler(struct tasklet_struct * t)468 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
469 {
470 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
471
472 ieee80211_handle_queued_frames(local);
473 }
474
ieee80211_restart_work(struct work_struct * work)475 static void ieee80211_restart_work(struct work_struct *work)
476 {
477 struct ieee80211_local *local =
478 container_of(work, struct ieee80211_local, restart_work);
479 struct ieee80211_sub_if_data *sdata;
480 int ret;
481
482 flush_workqueue(local->workqueue);
483
484 rtnl_lock();
485 /* we might do interface manipulations, so need both */
486 wiphy_lock(local->hw.wiphy);
487 wiphy_work_flush(local->hw.wiphy, NULL);
488
489 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
490 "%s called with hardware scan in progress\n", __func__);
491
492 list_for_each_entry(sdata, &local->interfaces, list) {
493 /*
494 * XXX: there may be more work for other vif types and even
495 * for station mode: a good thing would be to run most of
496 * the iface type's dependent _stop (ieee80211_mg_stop,
497 * ieee80211_ibss_stop) etc...
498 * For now, fix only the specific bug that was seen: race
499 * between csa_connection_drop_work and us.
500 */
501 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
502 /*
503 * This worker is scheduled from the iface worker that
504 * runs on mac80211's workqueue, so we can't be
505 * scheduling this worker after the cancel right here.
506 * The exception is ieee80211_chswitch_done.
507 * Then we can have a race...
508 */
509 wiphy_work_cancel(local->hw.wiphy,
510 &sdata->u.mgd.csa_connection_drop_work);
511 if (sdata->vif.bss_conf.csa_active)
512 ieee80211_sta_connection_lost(sdata,
513 WLAN_REASON_UNSPECIFIED,
514 false);
515 }
516 wiphy_delayed_work_flush(local->hw.wiphy,
517 &sdata->dec_tailroom_needed_wk);
518 }
519 ieee80211_scan_cancel(local);
520
521 /* make sure any new ROC will consider local->in_reconfig */
522 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
523 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
524
525 /* wait for all packet processing to be done */
526 synchronize_net();
527
528 ret = ieee80211_reconfig(local);
529 wiphy_unlock(local->hw.wiphy);
530
531 if (ret)
532 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
533
534 rtnl_unlock();
535 }
536
ieee80211_restart_hw(struct ieee80211_hw * hw)537 void ieee80211_restart_hw(struct ieee80211_hw *hw)
538 {
539 struct ieee80211_local *local = hw_to_local(hw);
540
541 trace_api_restart_hw(local);
542
543 wiphy_info(hw->wiphy,
544 "Hardware restart was requested\n");
545
546 /* use this reason, ieee80211_reconfig will unblock it */
547 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
548 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
549 false);
550
551 /*
552 * Stop all Rx during the reconfig. We don't want state changes
553 * or driver callbacks while this is in progress.
554 */
555 local->in_reconfig = true;
556 barrier();
557
558 queue_work(system_freezable_wq, &local->restart_work);
559 }
560 EXPORT_SYMBOL(ieee80211_restart_hw);
561
562 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)563 static int ieee80211_ifa_changed(struct notifier_block *nb,
564 unsigned long data, void *arg)
565 {
566 struct in_ifaddr *ifa = arg;
567 struct ieee80211_local *local =
568 container_of(nb, struct ieee80211_local,
569 ifa_notifier);
570 struct net_device *ndev = ifa->ifa_dev->dev;
571 struct wireless_dev *wdev = ndev->ieee80211_ptr;
572 struct in_device *idev;
573 struct ieee80211_sub_if_data *sdata;
574 struct ieee80211_vif_cfg *vif_cfg;
575 struct ieee80211_if_managed *ifmgd;
576 int c = 0;
577
578 /* Make sure it's our interface that got changed */
579 if (!wdev)
580 return NOTIFY_DONE;
581
582 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
583 return NOTIFY_DONE;
584
585 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
586 vif_cfg = &sdata->vif.cfg;
587
588 /* ARP filtering is only supported in managed mode */
589 if (sdata->vif.type != NL80211_IFTYPE_STATION)
590 return NOTIFY_DONE;
591
592 idev = __in_dev_get_rtnl(sdata->dev);
593 if (!idev)
594 return NOTIFY_DONE;
595
596 ifmgd = &sdata->u.mgd;
597
598 /*
599 * The nested here is needed to convince lockdep that this is
600 * all OK. Yes, we lock the wiphy mutex here while we already
601 * hold the notifier rwsem, that's the normal case. And yes,
602 * we also acquire the notifier rwsem again when unregistering
603 * a netdev while we already hold the wiphy mutex, so it does
604 * look like a typical ABBA deadlock.
605 *
606 * However, both of these things happen with the RTNL held
607 * already. Therefore, they can't actually happen, since the
608 * lock orders really are ABC and ACB, which is fine due to
609 * the RTNL (A).
610 *
611 * We still need to prevent recursion, which is accomplished
612 * by the !wdev->registered check above.
613 */
614 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
615 __acquire(&local->hw.wiphy->mtx);
616
617 /* Copy the addresses to the vif config list */
618 ifa = rtnl_dereference(idev->ifa_list);
619 while (ifa) {
620 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
621 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
622 ifa = rtnl_dereference(ifa->ifa_next);
623 c++;
624 }
625
626 vif_cfg->arp_addr_cnt = c;
627
628 /* Configure driver only if associated (which also implies it is up) */
629 if (ifmgd->associated)
630 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
631
632 wiphy_unlock(local->hw.wiphy);
633
634 return NOTIFY_OK;
635 }
636 #endif
637
638 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)639 static int ieee80211_ifa6_changed(struct notifier_block *nb,
640 unsigned long data, void *arg)
641 {
642 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
643 struct inet6_dev *idev = ifa->idev;
644 struct net_device *ndev = ifa->idev->dev;
645 struct ieee80211_local *local =
646 container_of(nb, struct ieee80211_local, ifa6_notifier);
647 struct wireless_dev *wdev = ndev->ieee80211_ptr;
648 struct ieee80211_sub_if_data *sdata;
649
650 /* Make sure it's our interface that got changed */
651 if (!wdev || wdev->wiphy != local->hw.wiphy)
652 return NOTIFY_DONE;
653
654 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
655
656 /*
657 * For now only support station mode. This is mostly because
658 * doing AP would have to handle AP_VLAN in some way ...
659 */
660 if (sdata->vif.type != NL80211_IFTYPE_STATION)
661 return NOTIFY_DONE;
662
663 drv_ipv6_addr_change(local, sdata, idev);
664
665 return NOTIFY_OK;
666 }
667 #endif
668
669 /* There isn't a lot of sense in it, but you can transmit anything you like */
670 static const struct ieee80211_txrx_stypes
671 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
672 [NL80211_IFTYPE_ADHOC] = {
673 .tx = 0xffff,
674 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
675 BIT(IEEE80211_STYPE_AUTH >> 4) |
676 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
677 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
678 },
679 [NL80211_IFTYPE_STATION] = {
680 .tx = 0xffff,
681 /*
682 * To support Pre Association Security Negotiation (PASN) while
683 * already associated to one AP, allow user space to register to
684 * Rx authentication frames, so that the user space logic would
685 * be able to receive/handle authentication frames from a
686 * different AP as part of PASN.
687 * It is expected that user space would intelligently register
688 * for Rx authentication frames, i.e., only when PASN is used
689 * and configure a match filter only for PASN authentication
690 * algorithm, as otherwise the MLME functionality of mac80211
691 * would be broken.
692 */
693 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
694 BIT(IEEE80211_STYPE_AUTH >> 4) |
695 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
696 },
697 [NL80211_IFTYPE_AP] = {
698 .tx = 0xffff,
699 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
700 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
701 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
702 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
703 BIT(IEEE80211_STYPE_AUTH >> 4) |
704 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
705 BIT(IEEE80211_STYPE_ACTION >> 4),
706 },
707 [NL80211_IFTYPE_AP_VLAN] = {
708 /* copy AP */
709 .tx = 0xffff,
710 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
711 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
712 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
713 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
714 BIT(IEEE80211_STYPE_AUTH >> 4) |
715 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
716 BIT(IEEE80211_STYPE_ACTION >> 4),
717 },
718 [NL80211_IFTYPE_P2P_CLIENT] = {
719 .tx = 0xffff,
720 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
721 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
722 },
723 [NL80211_IFTYPE_P2P_GO] = {
724 .tx = 0xffff,
725 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
726 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
727 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
728 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
729 BIT(IEEE80211_STYPE_AUTH >> 4) |
730 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
731 BIT(IEEE80211_STYPE_ACTION >> 4),
732 },
733 [NL80211_IFTYPE_MESH_POINT] = {
734 .tx = 0xffff,
735 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
736 BIT(IEEE80211_STYPE_AUTH >> 4) |
737 BIT(IEEE80211_STYPE_DEAUTH >> 4),
738 },
739 [NL80211_IFTYPE_P2P_DEVICE] = {
740 .tx = 0xffff,
741 /*
742 * To support P2P PASN pairing let user space register to rx
743 * also AUTH frames on P2P device interface.
744 */
745 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
746 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
747 BIT(IEEE80211_STYPE_AUTH >> 4),
748 },
749 [NL80211_IFTYPE_NAN] = {
750 .tx = 0xffff,
751 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
752 BIT(IEEE80211_STYPE_AUTH >> 4),
753 },
754 };
755
756 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
757 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
758 IEEE80211_HT_AMPDU_PARM_DENSITY,
759
760 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
761 IEEE80211_HT_CAP_MAX_AMSDU |
762 IEEE80211_HT_CAP_SGI_20 |
763 IEEE80211_HT_CAP_SGI_40 |
764 IEEE80211_HT_CAP_TX_STBC |
765 IEEE80211_HT_CAP_RX_STBC |
766 IEEE80211_HT_CAP_LDPC_CODING |
767 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
768 .mcs = {
769 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
770 0xff, 0xff, 0xff, 0xff, 0xff, },
771 },
772 };
773
774 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
775 .vht_cap_info =
776 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
777 IEEE80211_VHT_CAP_SHORT_GI_80 |
778 IEEE80211_VHT_CAP_SHORT_GI_160 |
779 IEEE80211_VHT_CAP_RXSTBC_MASK |
780 IEEE80211_VHT_CAP_TXSTBC |
781 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
782 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
783 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
784 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
785 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
786 .supp_mcs = {
787 .rx_mcs_map = cpu_to_le16(~0),
788 .tx_mcs_map = cpu_to_le16(~0),
789 },
790 };
791
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)792 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
793 const struct ieee80211_ops *ops,
794 const char *requested_name)
795 {
796 struct ieee80211_local *local;
797 int priv_size, i;
798 struct wiphy *wiphy;
799 bool emulate_chanctx;
800
801 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
802 !ops->add_interface || !ops->remove_interface ||
803 !ops->configure_filter || !ops->wake_tx_queue))
804 return NULL;
805
806 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
807 return NULL;
808
809 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
810 (ops->link_info_changed && ops->bss_info_changed)))
811 return NULL;
812
813 /* check all or no channel context operations exist */
814 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
815 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
816 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
817 if (WARN_ON(ops->assign_vif_chanctx ||
818 ops->unassign_vif_chanctx))
819 return NULL;
820 emulate_chanctx = true;
821 } else {
822 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
823 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
824 ops->change_chanctx == ieee80211_emulate_change_chanctx))
825 return NULL;
826 if (WARN_ON(!ops->add_chanctx ||
827 !ops->remove_chanctx ||
828 !ops->change_chanctx ||
829 !ops->assign_vif_chanctx ||
830 !ops->unassign_vif_chanctx))
831 return NULL;
832 emulate_chanctx = false;
833 }
834
835 /* Ensure 32-byte alignment of our private data and hw private data.
836 * We use the wiphy priv data for both our ieee80211_local and for
837 * the driver's private data
838 *
839 * In memory it'll be like this:
840 *
841 * +-------------------------+
842 * | struct wiphy |
843 * +-------------------------+
844 * | struct ieee80211_local |
845 * +-------------------------+
846 * | driver's private data |
847 * +-------------------------+
848 *
849 */
850 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
851
852 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
853
854 if (!wiphy)
855 return NULL;
856
857 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
858
859 wiphy->privid = mac80211_wiphy_privid;
860
861 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
862 WIPHY_FLAG_4ADDR_AP |
863 WIPHY_FLAG_4ADDR_STATION |
864 WIPHY_FLAG_REPORTS_OBSS |
865 WIPHY_FLAG_OFFCHAN_TX;
866
867 if (emulate_chanctx || ops->remain_on_channel)
868 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
869
870 wiphy->bss_param_support = WIPHY_BSS_PARAM_CTS_PROT |
871 WIPHY_BSS_PARAM_SHORT_PREAMBLE |
872 WIPHY_BSS_PARAM_SHORT_SLOT_TIME |
873 WIPHY_BSS_PARAM_BASIC_RATES |
874 WIPHY_BSS_PARAM_AP_ISOLATE |
875 WIPHY_BSS_PARAM_HT_OPMODE |
876 WIPHY_BSS_PARAM_P2P_CTWINDOW |
877 WIPHY_BSS_PARAM_P2P_OPPPS;
878 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
879 NL80211_FEATURE_SAE |
880 NL80211_FEATURE_HT_IBSS |
881 NL80211_FEATURE_VIF_TXPOWER |
882 NL80211_FEATURE_MAC_ON_CREATE |
883 NL80211_FEATURE_USERSPACE_MPM |
884 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
885 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
886 wiphy_ext_feature_set(wiphy,
887 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
888 wiphy_ext_feature_set(wiphy,
889 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
890 wiphy_ext_feature_set(wiphy,
891 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
892 wiphy_ext_feature_set(wiphy,
893 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
894 wiphy_ext_feature_set(wiphy,
895 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
896
897 if (!ops->hw_scan) {
898 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
899 NL80211_FEATURE_AP_SCAN;
900 /*
901 * if the driver behaves correctly using the probe request
902 * (template) from mac80211, then both of these should be
903 * supported even with hw scan - but let drivers opt in.
904 */
905 wiphy_ext_feature_set(wiphy,
906 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
907 wiphy_ext_feature_set(wiphy,
908 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
909 }
910
911 if (!ops->set_key) {
912 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
913 wiphy_ext_feature_set(wiphy,
914 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
915 }
916
917 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
918 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
919
920 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
921
922 local = wiphy_priv(wiphy);
923
924 if (sta_info_init(local))
925 goto err_free;
926
927 local->hw.wiphy = wiphy;
928
929 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
930
931 local->ops = ops;
932 local->emulate_chanctx = emulate_chanctx;
933
934 if (emulate_chanctx)
935 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
936
937 /*
938 * We need a bit of data queued to build aggregates properly, so
939 * instruct the TCP stack to allow more than a single ms of data
940 * to be queued in the stack. The value is a bit-shift of 1
941 * second, so 7 is ~8ms of queued data. Only affects local TCP
942 * sockets.
943 * This is the default, anyhow - drivers may need to override it
944 * for local reasons (longer buffers, longer completion time, or
945 * similar).
946 */
947 local->hw.tx_sk_pacing_shift = 7;
948
949 /* set up some defaults */
950 local->hw.queues = 1;
951 local->hw.max_rates = 1;
952 local->hw.max_report_rates = 0;
953 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
954 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
955 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
956 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
957 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
958 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
959 IEEE80211_RADIOTAP_MCS_HAVE_GI |
960 IEEE80211_RADIOTAP_MCS_HAVE_BW;
961 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
962 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
963 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
964 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
965 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
966 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
967 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
968 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
969
970 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
971
972 wiphy->extended_capabilities = local->ext_capa;
973 wiphy->extended_capabilities_mask = local->ext_capa;
974 wiphy->extended_capabilities_len =
975 ARRAY_SIZE(local->ext_capa);
976
977 INIT_LIST_HEAD(&local->interfaces);
978 INIT_LIST_HEAD(&local->mon_list);
979
980 __hw_addr_init(&local->mc_list);
981
982 mutex_init(&local->iflist_mtx);
983 spin_lock_init(&local->filter_lock);
984 spin_lock_init(&local->rx_path_lock);
985 spin_lock_init(&local->queue_stop_reason_lock);
986
987 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
988 INIT_LIST_HEAD(&local->active_txqs[i]);
989 spin_lock_init(&local->active_txq_lock[i]);
990 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
991 local->aql_txq_limit_high[i] =
992 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
993 atomic_set(&local->aql_ac_pending_airtime[i], 0);
994 }
995
996 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
997 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
998 atomic_set(&local->aql_total_pending_airtime, 0);
999
1000 spin_lock_init(&local->handle_wake_tx_queue_lock);
1001
1002 INIT_LIST_HEAD(&local->chanctx_list);
1003
1004 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
1005
1006 INIT_WORK(&local->restart_work, ieee80211_restart_work);
1007
1008 wiphy_work_init(&local->radar_detected_work,
1009 ieee80211_dfs_radar_detected_work);
1010
1011 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
1012
1013 wiphy_work_init(&local->dynamic_ps_enable_work,
1014 ieee80211_dynamic_ps_enable_work);
1015 wiphy_work_init(&local->dynamic_ps_disable_work,
1016 ieee80211_dynamic_ps_disable_work);
1017 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
1018
1019 wiphy_work_init(&local->sched_scan_stopped_work,
1020 ieee80211_sched_scan_stopped_work);
1021
1022 spin_lock_init(&local->ack_status_lock);
1023 idr_init(&local->ack_status_frames);
1024
1025 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1026 skb_queue_head_init(&local->pending[i]);
1027 atomic_set(&local->agg_queue_stop[i], 0);
1028 }
1029 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
1030 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
1031 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
1032
1033 skb_queue_head_init(&local->skb_queue);
1034 skb_queue_head_init(&local->skb_queue_unreliable);
1035
1036 ieee80211_alloc_led_names(local);
1037
1038 ieee80211_roc_setup(local);
1039
1040 local->hw.radiotap_timestamp.units_pos = -1;
1041 local->hw.radiotap_timestamp.accuracy = -1;
1042
1043 return &local->hw;
1044 err_free:
1045 wiphy_free(wiphy);
1046 return NULL;
1047 }
1048 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1049
ieee80211_init_cipher_suites(struct ieee80211_local * local)1050 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1051 {
1052 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1053 static const u32 cipher_suites[] = {
1054 /* keep WEP and TKIP first, they may be removed below */
1055 WLAN_CIPHER_SUITE_WEP40,
1056 WLAN_CIPHER_SUITE_WEP104,
1057 WLAN_CIPHER_SUITE_TKIP,
1058 WLAN_CIPHER_SUITE_CCMP,
1059 WLAN_CIPHER_SUITE_CCMP_256,
1060 WLAN_CIPHER_SUITE_GCMP,
1061 WLAN_CIPHER_SUITE_GCMP_256,
1062
1063 /* keep last -- depends on hw flags! */
1064 WLAN_CIPHER_SUITE_AES_CMAC,
1065 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1066 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1067 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1068 };
1069
1070 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) && fips_enabled) {
1071 dev_err(local->hw.wiphy->dev.parent,
1072 "Drivers with SW_CRYPTO_CONTROL cannot work with FIPS\n");
1073 return -EINVAL;
1074 }
1075
1076 if (WARN_ON(ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) &&
1077 !local->hw.wiphy->cipher_suites))
1078 return -EINVAL;
1079
1080 if (fips_enabled || !local->hw.wiphy->cipher_suites) {
1081 /* assign the (software supported and perhaps offloaded)
1082 * cipher suites
1083 */
1084 local->hw.wiphy->cipher_suites = cipher_suites;
1085 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1086
1087 if (!have_mfp)
1088 local->hw.wiphy->n_cipher_suites -= 4;
1089
1090 /* FIPS does not permit the use of RC4 */
1091 if (fips_enabled) {
1092 local->hw.wiphy->cipher_suites += 3;
1093 local->hw.wiphy->n_cipher_suites -= 3;
1094 }
1095 }
1096
1097 return 0;
1098 }
1099
1100 static bool
ieee80211_ifcomb_check(const struct ieee80211_iface_combination * c,int n_comb)1101 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
1102 {
1103 int i, j;
1104
1105 for (i = 0; i < n_comb; i++, c++) {
1106 /* DFS is not supported with multi-channel combinations yet */
1107 if (c->radar_detect_widths &&
1108 c->num_different_channels > 1)
1109 return false;
1110
1111 /* mac80211 doesn't support more than one IBSS interface */
1112 for (j = 0; j < c->n_limits; j++)
1113 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1114 c->limits[j].max > 1)
1115 return false;
1116 }
1117
1118 return true;
1119 }
1120
ieee80211_register_hw(struct ieee80211_hw * hw)1121 int ieee80211_register_hw(struct ieee80211_hw *hw)
1122 {
1123 struct ieee80211_local *local = hw_to_local(hw);
1124 int result, i;
1125 enum nl80211_band band;
1126 int channels, max_bitrates;
1127 bool supp_ht, supp_vht, supp_he, supp_eht, supp_s1g;
1128 struct cfg80211_chan_def dflt_chandef = {};
1129
1130 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1131 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1132 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1133 return -EINVAL;
1134
1135 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1136 (!local->ops->tdls_channel_switch ||
1137 !local->ops->tdls_cancel_channel_switch ||
1138 !local->ops->tdls_recv_channel_switch))
1139 return -EOPNOTSUPP;
1140
1141 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1142 !local->ops->set_frag_threshold))
1143 return -EINVAL;
1144
1145 if (WARN_ON(local->hw.wiphy->interface_modes &
1146 BIT(NL80211_IFTYPE_NAN) &&
1147 (!local->ops->start_nan || !local->ops->stop_nan)))
1148 return -EINVAL;
1149
1150 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1151 /*
1152 * For drivers capable of doing MLO, assume modern driver
1153 * or firmware facilities, so software doesn't have to do
1154 * as much, e.g. monitoring beacons would be hard if we
1155 * might not even know which link is active at which time.
1156 */
1157 if (WARN_ON(local->emulate_chanctx))
1158 return -EINVAL;
1159
1160 if (WARN_ON(!local->ops->link_info_changed))
1161 return -EINVAL;
1162
1163 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1164 return -EINVAL;
1165
1166 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1167 return -EINVAL;
1168
1169 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1170 return -EINVAL;
1171
1172 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1173 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1174 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1175 return -EINVAL;
1176
1177 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1178 return -EINVAL;
1179
1180 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1181 return -EINVAL;
1182
1183 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1184 return -EINVAL;
1185
1186 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1187 return -EINVAL;
1188 }
1189
1190 #ifdef CONFIG_PM
1191 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1192 return -EINVAL;
1193 #endif
1194
1195 if (local->emulate_chanctx) {
1196 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1197 const struct ieee80211_iface_combination *comb;
1198
1199 comb = &local->hw.wiphy->iface_combinations[i];
1200
1201 if (comb->num_different_channels > 1)
1202 return -EINVAL;
1203 }
1204 }
1205
1206 if (hw->wiphy->n_radio) {
1207 for (i = 0; i < hw->wiphy->n_radio; i++) {
1208 const struct wiphy_radio *radio = &hw->wiphy->radio[i];
1209
1210 if (!ieee80211_ifcomb_check(radio->iface_combinations,
1211 radio->n_iface_combinations))
1212 return -EINVAL;
1213 }
1214 } else {
1215 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
1216 hw->wiphy->n_iface_combinations))
1217 return -EINVAL;
1218 }
1219
1220 /* Only HW csum features are currently compatible with mac80211 */
1221 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1222 return -EINVAL;
1223
1224 if (hw->max_report_rates == 0)
1225 hw->max_report_rates = hw->max_rates;
1226
1227 local->rx_chains = 1;
1228
1229 /*
1230 * generic code guarantees at least one band,
1231 * set this very early because much code assumes
1232 * that hw.conf.channel is assigned
1233 */
1234 channels = 0;
1235 max_bitrates = 0;
1236 supp_ht = false;
1237 supp_vht = false;
1238 supp_he = false;
1239 supp_eht = false;
1240 supp_s1g = false;
1241 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1242 const struct ieee80211_sband_iftype_data *iftd;
1243 struct ieee80211_supported_band *sband;
1244
1245 sband = local->hw.wiphy->bands[band];
1246 if (!sband)
1247 continue;
1248
1249 if (!dflt_chandef.chan) {
1250 /*
1251 * Assign the first enabled channel to dflt_chandef
1252 * from the list of channels. For S1G interfaces
1253 * ensure it can be used as a primary.
1254 */
1255 for (i = 0; i < sband->n_channels; i++)
1256 if (!(sband->channels[i].flags &
1257 (IEEE80211_CHAN_DISABLED |
1258 IEEE80211_CHAN_S1G_NO_PRIMARY)))
1259 break;
1260 /* if none found then use the first anyway */
1261 if (i == sband->n_channels)
1262 i = 0;
1263 cfg80211_chandef_create(&dflt_chandef,
1264 &sband->channels[i],
1265 NL80211_CHAN_NO_HT);
1266 /* init channel we're on */
1267 local->monitor_chanreq.oper = dflt_chandef;
1268 if (local->emulate_chanctx) {
1269 local->dflt_chandef = dflt_chandef;
1270 local->hw.conf.chandef = dflt_chandef;
1271 }
1272 }
1273
1274 channels += sband->n_channels;
1275
1276 /*
1277 * Due to the way the aggregation code handles this and it
1278 * being an HT capability, we can't really support delayed
1279 * BA in MLO (yet).
1280 */
1281 if (WARN_ON(sband->ht_cap.ht_supported &&
1282 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1283 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1284 return -EINVAL;
1285
1286 if (max_bitrates < sband->n_bitrates)
1287 max_bitrates = sband->n_bitrates;
1288 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1289 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1290 supp_s1g = supp_s1g || sband->s1g_cap.s1g;
1291
1292 for_each_sband_iftype_data(sband, i, iftd) {
1293 u8 he_40_mhz_cap;
1294
1295 supp_he = supp_he || iftd->he_cap.has_he;
1296 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1297
1298 if (band == NL80211_BAND_2GHZ)
1299 he_40_mhz_cap =
1300 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1301 else
1302 he_40_mhz_cap =
1303 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1304
1305 /* currently no support for HE client where HT has 40 MHz but not HT */
1306 if (iftd->he_cap.has_he &&
1307 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1308 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1309 sband->ht_cap.ht_supported &&
1310 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1311 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1312 return -EINVAL;
1313
1314 /* no support for per-band vendor elems with MLO */
1315 if (WARN_ON(iftd->vendor_elems.len &&
1316 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1317 return -EINVAL;
1318 }
1319
1320 /* HT, VHT, HE require QoS, thus >= 4 queues */
1321 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1322 (supp_ht || supp_vht || supp_he)))
1323 return -EINVAL;
1324
1325 /* EHT requires HE support */
1326 if (WARN_ON(supp_eht && !supp_he))
1327 return -EINVAL;
1328
1329 if (!sband->ht_cap.ht_supported)
1330 continue;
1331
1332 /* TODO: consider VHT for RX chains, hopefully it's the same */
1333 local->rx_chains =
1334 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1335 local->rx_chains);
1336
1337 /* no need to mask, SM_PS_DISABLED has all bits set */
1338 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1339 IEEE80211_HT_CAP_SM_PS_SHIFT;
1340 }
1341
1342 /* if low-level driver supports AP, we also support VLAN.
1343 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1344 * based on their support to transmit SW encrypted packets.
1345 */
1346 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1347 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1348 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1349 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1350 }
1351
1352 /* mac80211 always supports monitor */
1353 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1354 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1355
1356
1357 local->int_scan_req = kzalloc(struct_size(local->int_scan_req,
1358 channels, channels),
1359 GFP_KERNEL);
1360 if (!local->int_scan_req)
1361 return -ENOMEM;
1362
1363 eth_broadcast_addr(local->int_scan_req->bssid);
1364
1365 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1366 if (!local->hw.wiphy->bands[band])
1367 continue;
1368 local->int_scan_req->rates[band] = (u32) -1;
1369 }
1370
1371 #ifndef CONFIG_MAC80211_MESH
1372 /* mesh depends on Kconfig, but drivers should set it if they want */
1373 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1374 #endif
1375
1376 /* if the underlying driver supports mesh, mac80211 will (at least)
1377 * provide routing of mesh authentication frames to userspace */
1378 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1379 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1380
1381 /* mac80211 supports control port protocol changing */
1382 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1383
1384 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1385 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1386 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1387 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1388 if (hw->max_signal <= 0) {
1389 result = -EINVAL;
1390 goto fail_workqueue;
1391 }
1392 }
1393
1394 /* Mac80211 and therefore all drivers using SW crypto only
1395 * are able to handle PTK rekeys and Extended Key ID.
1396 */
1397 if (!local->ops->set_key) {
1398 wiphy_ext_feature_set(local->hw.wiphy,
1399 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1400 wiphy_ext_feature_set(local->hw.wiphy,
1401 NL80211_EXT_FEATURE_EXT_KEY_ID);
1402 }
1403
1404 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1405 wiphy_ext_feature_set(local->hw.wiphy,
1406 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1407
1408 /*
1409 * Calculate scan IE length -- we need this to alloc
1410 * memory and to subtract from the driver limit. It
1411 * includes the DS Params, (extended) supported rates, and HT
1412 * information -- SSID is the driver's responsibility.
1413 */
1414 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1415 3 /* DS Params */;
1416 if (supp_ht)
1417 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1418
1419 if (supp_vht)
1420 local->scan_ies_len +=
1421 2 + sizeof(struct ieee80211_vht_cap);
1422
1423 if (supp_s1g)
1424 local->scan_ies_len += 2 + sizeof(struct ieee80211_s1g_cap);
1425
1426 /*
1427 * HE cap element is variable in size - set len to allow max size */
1428 if (supp_he) {
1429 local->scan_ies_len +=
1430 3 + sizeof(struct ieee80211_he_cap_elem) +
1431 sizeof(struct ieee80211_he_mcs_nss_supp) +
1432 IEEE80211_HE_PPE_THRES_MAX_LEN;
1433
1434 if (supp_eht)
1435 local->scan_ies_len +=
1436 3 + sizeof(struct ieee80211_eht_cap_elem) +
1437 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1438 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1439 }
1440
1441 if (!local->ops->hw_scan) {
1442 /* For hw_scan, driver needs to set these up. */
1443 local->hw.wiphy->max_scan_ssids = 4;
1444 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1445 }
1446
1447 /*
1448 * If the driver supports any scan IEs, then assume the
1449 * limit includes the IEs mac80211 will add, otherwise
1450 * leave it at zero and let the driver sort it out; we
1451 * still pass our IEs to the driver but userspace will
1452 * not be allowed to in that case.
1453 */
1454 if (local->hw.wiphy->max_scan_ie_len)
1455 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1456
1457 result = ieee80211_init_cipher_suites(local);
1458 if (result < 0)
1459 goto fail_workqueue;
1460
1461 if (!local->ops->remain_on_channel)
1462 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1463
1464 /* mac80211 based drivers don't support internal TDLS setup */
1465 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1466 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1467
1468 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1469 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1470 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1471
1472 /* mac80211 supports multi BSSID, if the driver supports it */
1473 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1474 local->hw.wiphy->support_mbssid = true;
1475 if (ieee80211_hw_check(&local->hw,
1476 SUPPORTS_ONLY_HE_MULTI_BSSID))
1477 local->hw.wiphy->support_only_he_mbssid = true;
1478 else
1479 local->ext_capa[2] |=
1480 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1481 }
1482
1483 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1484
1485 /*
1486 * We use the number of queues for feature tests (QoS, HT) internally
1487 * so restrict them appropriately.
1488 */
1489 if (hw->queues > IEEE80211_MAX_QUEUES)
1490 hw->queues = IEEE80211_MAX_QUEUES;
1491
1492 local->workqueue =
1493 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1494 if (!local->workqueue) {
1495 result = -ENOMEM;
1496 goto fail_workqueue;
1497 }
1498
1499 /*
1500 * The hardware needs headroom for sending the frame,
1501 * and we need some headroom for passing the frame to monitor
1502 * interfaces, but never both at the same time.
1503 */
1504 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1505 IEEE80211_TX_STATUS_HEADROOM);
1506
1507 /*
1508 * if the driver doesn't specify a max listen interval we
1509 * use 5 which should be a safe default
1510 */
1511 if (local->hw.max_listen_interval == 0)
1512 local->hw.max_listen_interval = 5;
1513
1514 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1515
1516 local->dynamic_ps_forced_timeout = -1;
1517
1518 if (!local->hw.max_nan_de_entries)
1519 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1520
1521 if (!local->hw.weight_multiplier)
1522 local->hw.weight_multiplier = 1;
1523
1524 ieee80211_wep_init(local);
1525
1526 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1527
1528 ieee80211_led_init(local);
1529
1530 result = ieee80211_txq_setup_flows(local);
1531 if (result)
1532 goto fail_flows;
1533
1534 rtnl_lock();
1535 result = ieee80211_init_rate_ctrl_alg(local,
1536 hw->rate_control_algorithm);
1537 rtnl_unlock();
1538 if (result < 0) {
1539 wiphy_debug(local->hw.wiphy,
1540 "Failed to initialize rate control algorithm\n");
1541 goto fail_rate;
1542 }
1543
1544 if (local->rate_ctrl) {
1545 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1546 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1547 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1548 }
1549
1550 /*
1551 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1552 * or have it when we don't, copy the sband structure and set/clear it.
1553 * This is necessary because rate scaling algorithms could be switched
1554 * and have different support values.
1555 * Print a message so that in the common case the reallocation can be
1556 * avoided.
1557 */
1558 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1559 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1560 struct ieee80211_supported_band *sband;
1561 bool local_cap, ie_cap;
1562
1563 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1564
1565 sband = local->hw.wiphy->bands[band];
1566 if (!sband || !sband->vht_cap.vht_supported)
1567 continue;
1568
1569 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1570 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1571
1572 if (local_cap == ie_cap)
1573 continue;
1574
1575 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1576 if (!sband) {
1577 result = -ENOMEM;
1578 goto fail_rate;
1579 }
1580
1581 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1582 band);
1583
1584 sband->vht_cap.vht_mcs.tx_highest ^=
1585 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1586
1587 local->hw.wiphy->bands[band] = sband;
1588 local->sband_allocated |= BIT(band);
1589 }
1590
1591 result = wiphy_register(local->hw.wiphy);
1592 if (result < 0)
1593 goto fail_wiphy_register;
1594
1595 debugfs_hw_add(local);
1596 rate_control_add_debugfs(local);
1597
1598 ieee80211_check_wbrf_support(local);
1599
1600 rtnl_lock();
1601 wiphy_lock(hw->wiphy);
1602
1603 /* add one default STA interface if supported */
1604 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1605 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1606 struct vif_params params = {0};
1607
1608 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1609 NL80211_IFTYPE_STATION, ¶ms);
1610 if (result)
1611 wiphy_warn(local->hw.wiphy,
1612 "Failed to add default virtual iface\n");
1613 }
1614
1615 wiphy_unlock(hw->wiphy);
1616 rtnl_unlock();
1617
1618 #ifdef CONFIG_INET
1619 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1620 result = register_inetaddr_notifier(&local->ifa_notifier);
1621 if (result)
1622 goto fail_ifa;
1623 #endif
1624
1625 #if IS_ENABLED(CONFIG_IPV6)
1626 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1627 result = register_inet6addr_notifier(&local->ifa6_notifier);
1628 if (result)
1629 goto fail_ifa6;
1630 #endif
1631
1632 return 0;
1633
1634 #if IS_ENABLED(CONFIG_IPV6)
1635 fail_ifa6:
1636 #ifdef CONFIG_INET
1637 unregister_inetaddr_notifier(&local->ifa_notifier);
1638 #endif
1639 #endif
1640 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1641 fail_ifa:
1642 #endif
1643 wiphy_unregister(local->hw.wiphy);
1644 fail_wiphy_register:
1645 rtnl_lock();
1646 rate_control_deinitialize(local);
1647 ieee80211_remove_interfaces(local);
1648 rtnl_unlock();
1649 fail_rate:
1650 ieee80211_txq_teardown_flows(local);
1651 fail_flows:
1652 ieee80211_led_exit(local);
1653 destroy_workqueue(local->workqueue);
1654 fail_workqueue:
1655 kfree(local->int_scan_req);
1656 return result;
1657 }
1658 EXPORT_SYMBOL(ieee80211_register_hw);
1659
ieee80211_unregister_hw(struct ieee80211_hw * hw)1660 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1661 {
1662 struct ieee80211_local *local = hw_to_local(hw);
1663
1664 tasklet_kill(&local->tx_pending_tasklet);
1665 tasklet_kill(&local->tasklet);
1666
1667 #ifdef CONFIG_INET
1668 unregister_inetaddr_notifier(&local->ifa_notifier);
1669 #endif
1670 #if IS_ENABLED(CONFIG_IPV6)
1671 unregister_inet6addr_notifier(&local->ifa6_notifier);
1672 #endif
1673
1674 rtnl_lock();
1675
1676 /*
1677 * At this point, interface list manipulations are fine
1678 * because the driver cannot be handing us frames any
1679 * more and the tasklet is killed.
1680 */
1681 ieee80211_remove_interfaces(local);
1682
1683 ieee80211_txq_teardown_flows(local);
1684
1685 wiphy_lock(local->hw.wiphy);
1686 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1687 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1688 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1689 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1690 wiphy_unlock(local->hw.wiphy);
1691 rtnl_unlock();
1692
1693 cancel_work_sync(&local->restart_work);
1694
1695 ieee80211_clear_tx_pending(local);
1696 rate_control_deinitialize(local);
1697
1698 if (skb_queue_len(&local->skb_queue) ||
1699 skb_queue_len(&local->skb_queue_unreliable))
1700 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1701 skb_queue_purge(&local->skb_queue);
1702 skb_queue_purge(&local->skb_queue_unreliable);
1703
1704 wiphy_unregister(local->hw.wiphy);
1705 destroy_workqueue(local->workqueue);
1706 ieee80211_led_exit(local);
1707 kfree(local->int_scan_req);
1708 }
1709 EXPORT_SYMBOL(ieee80211_unregister_hw);
1710
ieee80211_free_ack_frame(int id,void * p,void * data)1711 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1712 {
1713 WARN_ONCE(1, "Have pending ack frames!\n");
1714 kfree_skb(p);
1715 return 0;
1716 }
1717
ieee80211_free_hw(struct ieee80211_hw * hw)1718 void ieee80211_free_hw(struct ieee80211_hw *hw)
1719 {
1720 struct ieee80211_local *local = hw_to_local(hw);
1721 enum nl80211_band band;
1722
1723 mutex_destroy(&local->iflist_mtx);
1724
1725 idr_for_each(&local->ack_status_frames,
1726 ieee80211_free_ack_frame, NULL);
1727 idr_destroy(&local->ack_status_frames);
1728
1729 sta_info_stop(local);
1730
1731 ieee80211_free_led_names(local);
1732
1733 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1734 if (!(local->sband_allocated & BIT(band)))
1735 continue;
1736 kfree(local->hw.wiphy->bands[band]);
1737 }
1738
1739 wiphy_free(local->hw.wiphy);
1740 }
1741 EXPORT_SYMBOL(ieee80211_free_hw);
1742 #define V(x) #x,
1743 static const char * const drop_reasons_unusable[] = {
1744 [0] = "RX_DROP_UNUSABLE",
1745 MAC80211_DROP_REASONS_UNUSABLE(V)
1746 #undef V
1747 };
1748
1749 static struct drop_reason_list drop_reason_list_unusable = {
1750 .reasons = drop_reasons_unusable,
1751 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1752 };
1753
ieee80211_init(void)1754 static int __init ieee80211_init(void)
1755 {
1756 struct sk_buff *skb;
1757 int ret;
1758
1759 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1760 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1761 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1762
1763 ret = rc80211_minstrel_init();
1764 if (ret)
1765 return ret;
1766
1767 ret = ieee80211_iface_init();
1768 if (ret)
1769 goto err_netdev;
1770
1771 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1772 &drop_reason_list_unusable);
1773
1774 return 0;
1775 err_netdev:
1776 rc80211_minstrel_exit();
1777
1778 return ret;
1779 }
1780
ieee80211_exit(void)1781 static void __exit ieee80211_exit(void)
1782 {
1783 rc80211_minstrel_exit();
1784
1785 ieee80211s_stop();
1786
1787 ieee80211_iface_exit();
1788
1789 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1790
1791 rcu_barrier();
1792 }
1793
1794
1795 subsys_initcall(ieee80211_init);
1796 module_exit(ieee80211_exit);
1797
1798 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1799 MODULE_LICENSE("GPL");
1800