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 };
750
751 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
752 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
753 IEEE80211_HT_AMPDU_PARM_DENSITY,
754
755 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
756 IEEE80211_HT_CAP_MAX_AMSDU |
757 IEEE80211_HT_CAP_SGI_20 |
758 IEEE80211_HT_CAP_SGI_40 |
759 IEEE80211_HT_CAP_TX_STBC |
760 IEEE80211_HT_CAP_RX_STBC |
761 IEEE80211_HT_CAP_LDPC_CODING |
762 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
763 .mcs = {
764 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
765 0xff, 0xff, 0xff, 0xff, 0xff, },
766 },
767 };
768
769 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
770 .vht_cap_info =
771 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
772 IEEE80211_VHT_CAP_SHORT_GI_80 |
773 IEEE80211_VHT_CAP_SHORT_GI_160 |
774 IEEE80211_VHT_CAP_RXSTBC_MASK |
775 IEEE80211_VHT_CAP_TXSTBC |
776 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
777 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
778 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
779 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
780 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
781 .supp_mcs = {
782 .rx_mcs_map = cpu_to_le16(~0),
783 .tx_mcs_map = cpu_to_le16(~0),
784 },
785 };
786
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)787 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
788 const struct ieee80211_ops *ops,
789 const char *requested_name)
790 {
791 struct ieee80211_local *local;
792 int priv_size, i;
793 struct wiphy *wiphy;
794 bool emulate_chanctx;
795
796 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
797 !ops->add_interface || !ops->remove_interface ||
798 !ops->configure_filter || !ops->wake_tx_queue))
799 return NULL;
800
801 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
802 return NULL;
803
804 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
805 (ops->link_info_changed && ops->bss_info_changed)))
806 return NULL;
807
808 /* check all or no channel context operations exist */
809 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
810 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
811 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
812 if (WARN_ON(ops->assign_vif_chanctx ||
813 ops->unassign_vif_chanctx))
814 return NULL;
815 emulate_chanctx = true;
816 } else {
817 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
818 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
819 ops->change_chanctx == ieee80211_emulate_change_chanctx))
820 return NULL;
821 if (WARN_ON(!ops->add_chanctx ||
822 !ops->remove_chanctx ||
823 !ops->change_chanctx ||
824 !ops->assign_vif_chanctx ||
825 !ops->unassign_vif_chanctx))
826 return NULL;
827 emulate_chanctx = false;
828 }
829
830 /* Ensure 32-byte alignment of our private data and hw private data.
831 * We use the wiphy priv data for both our ieee80211_local and for
832 * the driver's private data
833 *
834 * In memory it'll be like this:
835 *
836 * +-------------------------+
837 * | struct wiphy |
838 * +-------------------------+
839 * | struct ieee80211_local |
840 * +-------------------------+
841 * | driver's private data |
842 * +-------------------------+
843 *
844 */
845 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
846
847 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
848
849 if (!wiphy)
850 return NULL;
851
852 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
853
854 wiphy->privid = mac80211_wiphy_privid;
855
856 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
857 WIPHY_FLAG_4ADDR_AP |
858 WIPHY_FLAG_4ADDR_STATION |
859 WIPHY_FLAG_REPORTS_OBSS |
860 WIPHY_FLAG_OFFCHAN_TX;
861
862 if (emulate_chanctx || ops->remain_on_channel)
863 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
864
865 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
866 NL80211_FEATURE_SAE |
867 NL80211_FEATURE_HT_IBSS |
868 NL80211_FEATURE_VIF_TXPOWER |
869 NL80211_FEATURE_MAC_ON_CREATE |
870 NL80211_FEATURE_USERSPACE_MPM |
871 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
872 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
873 wiphy_ext_feature_set(wiphy,
874 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
875 wiphy_ext_feature_set(wiphy,
876 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
877 wiphy_ext_feature_set(wiphy,
878 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
879 wiphy_ext_feature_set(wiphy,
880 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
881 wiphy_ext_feature_set(wiphy,
882 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
883
884 if (!ops->hw_scan) {
885 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
886 NL80211_FEATURE_AP_SCAN;
887 /*
888 * if the driver behaves correctly using the probe request
889 * (template) from mac80211, then both of these should be
890 * supported even with hw scan - but let drivers opt in.
891 */
892 wiphy_ext_feature_set(wiphy,
893 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
894 wiphy_ext_feature_set(wiphy,
895 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
896 }
897
898 if (!ops->set_key) {
899 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
900 wiphy_ext_feature_set(wiphy,
901 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
902 }
903
904 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
905 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
906
907 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
908
909 local = wiphy_priv(wiphy);
910
911 if (sta_info_init(local))
912 goto err_free;
913
914 local->hw.wiphy = wiphy;
915
916 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
917
918 local->ops = ops;
919 local->emulate_chanctx = emulate_chanctx;
920
921 if (emulate_chanctx)
922 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
923
924 /*
925 * We need a bit of data queued to build aggregates properly, so
926 * instruct the TCP stack to allow more than a single ms of data
927 * to be queued in the stack. The value is a bit-shift of 1
928 * second, so 7 is ~8ms of queued data. Only affects local TCP
929 * sockets.
930 * This is the default, anyhow - drivers may need to override it
931 * for local reasons (longer buffers, longer completion time, or
932 * similar).
933 */
934 local->hw.tx_sk_pacing_shift = 7;
935
936 /* set up some defaults */
937 local->hw.queues = 1;
938 local->hw.max_rates = 1;
939 local->hw.max_report_rates = 0;
940 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
941 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
942 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
943 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
944 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
945 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
946 IEEE80211_RADIOTAP_MCS_HAVE_GI |
947 IEEE80211_RADIOTAP_MCS_HAVE_BW;
948 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
949 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
950 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
951 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
952 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
953 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
954 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
955 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
956
957 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
958
959 wiphy->extended_capabilities = local->ext_capa;
960 wiphy->extended_capabilities_mask = local->ext_capa;
961 wiphy->extended_capabilities_len =
962 ARRAY_SIZE(local->ext_capa);
963
964 INIT_LIST_HEAD(&local->interfaces);
965 INIT_LIST_HEAD(&local->mon_list);
966
967 __hw_addr_init(&local->mc_list);
968
969 mutex_init(&local->iflist_mtx);
970 spin_lock_init(&local->filter_lock);
971 spin_lock_init(&local->rx_path_lock);
972 spin_lock_init(&local->queue_stop_reason_lock);
973
974 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
975 INIT_LIST_HEAD(&local->active_txqs[i]);
976 spin_lock_init(&local->active_txq_lock[i]);
977 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
978 local->aql_txq_limit_high[i] =
979 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
980 atomic_set(&local->aql_ac_pending_airtime[i], 0);
981 }
982
983 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
984 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
985 atomic_set(&local->aql_total_pending_airtime, 0);
986
987 spin_lock_init(&local->handle_wake_tx_queue_lock);
988
989 INIT_LIST_HEAD(&local->chanctx_list);
990
991 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
992
993 INIT_WORK(&local->restart_work, ieee80211_restart_work);
994
995 wiphy_work_init(&local->radar_detected_work,
996 ieee80211_dfs_radar_detected_work);
997
998 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
999
1000 wiphy_work_init(&local->dynamic_ps_enable_work,
1001 ieee80211_dynamic_ps_enable_work);
1002 wiphy_work_init(&local->dynamic_ps_disable_work,
1003 ieee80211_dynamic_ps_disable_work);
1004 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
1005
1006 wiphy_work_init(&local->sched_scan_stopped_work,
1007 ieee80211_sched_scan_stopped_work);
1008
1009 spin_lock_init(&local->ack_status_lock);
1010 idr_init(&local->ack_status_frames);
1011
1012 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1013 skb_queue_head_init(&local->pending[i]);
1014 atomic_set(&local->agg_queue_stop[i], 0);
1015 }
1016 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
1017 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
1018 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
1019
1020 skb_queue_head_init(&local->skb_queue);
1021 skb_queue_head_init(&local->skb_queue_unreliable);
1022
1023 ieee80211_alloc_led_names(local);
1024
1025 ieee80211_roc_setup(local);
1026
1027 local->hw.radiotap_timestamp.units_pos = -1;
1028 local->hw.radiotap_timestamp.accuracy = -1;
1029
1030 return &local->hw;
1031 err_free:
1032 wiphy_free(wiphy);
1033 return NULL;
1034 }
1035 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1036
ieee80211_init_cipher_suites(struct ieee80211_local * local)1037 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1038 {
1039 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1040 static const u32 cipher_suites[] = {
1041 /* keep WEP and TKIP first, they may be removed below */
1042 WLAN_CIPHER_SUITE_WEP40,
1043 WLAN_CIPHER_SUITE_WEP104,
1044 WLAN_CIPHER_SUITE_TKIP,
1045 WLAN_CIPHER_SUITE_CCMP,
1046 WLAN_CIPHER_SUITE_CCMP_256,
1047 WLAN_CIPHER_SUITE_GCMP,
1048 WLAN_CIPHER_SUITE_GCMP_256,
1049
1050 /* keep last -- depends on hw flags! */
1051 WLAN_CIPHER_SUITE_AES_CMAC,
1052 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1053 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1054 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1055 };
1056
1057 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) && fips_enabled) {
1058 dev_err(local->hw.wiphy->dev.parent,
1059 "Drivers with SW_CRYPTO_CONTROL cannot work with FIPS\n");
1060 return -EINVAL;
1061 }
1062
1063 if (WARN_ON(ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) &&
1064 !local->hw.wiphy->cipher_suites))
1065 return -EINVAL;
1066
1067 if (fips_enabled || !local->hw.wiphy->cipher_suites) {
1068 /* assign the (software supported and perhaps offloaded)
1069 * cipher suites
1070 */
1071 local->hw.wiphy->cipher_suites = cipher_suites;
1072 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1073
1074 if (!have_mfp)
1075 local->hw.wiphy->n_cipher_suites -= 4;
1076
1077 /* FIPS does not permit the use of RC4 */
1078 if (fips_enabled) {
1079 local->hw.wiphy->cipher_suites += 3;
1080 local->hw.wiphy->n_cipher_suites -= 3;
1081 }
1082 }
1083
1084 return 0;
1085 }
1086
1087 static bool
ieee80211_ifcomb_check(const struct ieee80211_iface_combination * c,int n_comb)1088 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
1089 {
1090 int i, j;
1091
1092 for (i = 0; i < n_comb; i++, c++) {
1093 /* DFS is not supported with multi-channel combinations yet */
1094 if (c->radar_detect_widths &&
1095 c->num_different_channels > 1)
1096 return false;
1097
1098 /* mac80211 doesn't support more than one IBSS interface */
1099 for (j = 0; j < c->n_limits; j++)
1100 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1101 c->limits[j].max > 1)
1102 return false;
1103 }
1104
1105 return true;
1106 }
1107
ieee80211_register_hw(struct ieee80211_hw * hw)1108 int ieee80211_register_hw(struct ieee80211_hw *hw)
1109 {
1110 struct ieee80211_local *local = hw_to_local(hw);
1111 int result, i;
1112 enum nl80211_band band;
1113 int channels, max_bitrates;
1114 bool supp_ht, supp_vht, supp_he, supp_eht;
1115 struct cfg80211_chan_def dflt_chandef = {};
1116
1117 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1118 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1119 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1120 return -EINVAL;
1121
1122 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1123 (!local->ops->tdls_channel_switch ||
1124 !local->ops->tdls_cancel_channel_switch ||
1125 !local->ops->tdls_recv_channel_switch))
1126 return -EOPNOTSUPP;
1127
1128 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1129 !local->ops->set_frag_threshold))
1130 return -EINVAL;
1131
1132 if (WARN_ON(local->hw.wiphy->interface_modes &
1133 BIT(NL80211_IFTYPE_NAN) &&
1134 (!local->ops->start_nan || !local->ops->stop_nan)))
1135 return -EINVAL;
1136
1137 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1138 /*
1139 * For drivers capable of doing MLO, assume modern driver
1140 * or firmware facilities, so software doesn't have to do
1141 * as much, e.g. monitoring beacons would be hard if we
1142 * might not even know which link is active at which time.
1143 */
1144 if (WARN_ON(local->emulate_chanctx))
1145 return -EINVAL;
1146
1147 if (WARN_ON(!local->ops->link_info_changed))
1148 return -EINVAL;
1149
1150 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1151 return -EINVAL;
1152
1153 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1154 return -EINVAL;
1155
1156 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1157 return -EINVAL;
1158
1159 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1160 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1161 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1162 return -EINVAL;
1163
1164 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1165 return -EINVAL;
1166
1167 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1168 return -EINVAL;
1169
1170 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1171 return -EINVAL;
1172
1173 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1174 return -EINVAL;
1175
1176 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1177 return -EINVAL;
1178 }
1179
1180 #ifdef CONFIG_PM
1181 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1182 return -EINVAL;
1183 #endif
1184
1185 if (local->emulate_chanctx) {
1186 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1187 const struct ieee80211_iface_combination *comb;
1188
1189 comb = &local->hw.wiphy->iface_combinations[i];
1190
1191 if (comb->num_different_channels > 1)
1192 return -EINVAL;
1193 }
1194 }
1195
1196 if (hw->wiphy->n_radio) {
1197 for (i = 0; i < hw->wiphy->n_radio; i++) {
1198 const struct wiphy_radio *radio = &hw->wiphy->radio[i];
1199
1200 if (!ieee80211_ifcomb_check(radio->iface_combinations,
1201 radio->n_iface_combinations))
1202 return -EINVAL;
1203 }
1204 } else {
1205 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
1206 hw->wiphy->n_iface_combinations))
1207 return -EINVAL;
1208 }
1209
1210 /* Only HW csum features are currently compatible with mac80211 */
1211 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1212 return -EINVAL;
1213
1214 if (hw->max_report_rates == 0)
1215 hw->max_report_rates = hw->max_rates;
1216
1217 local->rx_chains = 1;
1218
1219 /*
1220 * generic code guarantees at least one band,
1221 * set this very early because much code assumes
1222 * that hw.conf.channel is assigned
1223 */
1224 channels = 0;
1225 max_bitrates = 0;
1226 supp_ht = false;
1227 supp_vht = false;
1228 supp_he = false;
1229 supp_eht = false;
1230 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1231 const struct ieee80211_sband_iftype_data *iftd;
1232 struct ieee80211_supported_band *sband;
1233
1234 sband = local->hw.wiphy->bands[band];
1235 if (!sband)
1236 continue;
1237
1238 if (!dflt_chandef.chan) {
1239 /*
1240 * Assign the first enabled channel to dflt_chandef
1241 * from the list of channels
1242 */
1243 for (i = 0; i < sband->n_channels; i++)
1244 if (!(sband->channels[i].flags &
1245 IEEE80211_CHAN_DISABLED))
1246 break;
1247 /* if none found then use the first anyway */
1248 if (i == sband->n_channels)
1249 i = 0;
1250 cfg80211_chandef_create(&dflt_chandef,
1251 &sband->channels[i],
1252 NL80211_CHAN_NO_HT);
1253 /* init channel we're on */
1254 local->monitor_chanreq.oper = dflt_chandef;
1255 if (local->emulate_chanctx) {
1256 local->dflt_chandef = dflt_chandef;
1257 local->hw.conf.chandef = dflt_chandef;
1258 }
1259 }
1260
1261 channels += sband->n_channels;
1262
1263 /*
1264 * Due to the way the aggregation code handles this and it
1265 * being an HT capability, we can't really support delayed
1266 * BA in MLO (yet).
1267 */
1268 if (WARN_ON(sband->ht_cap.ht_supported &&
1269 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1270 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1271 return -EINVAL;
1272
1273 if (max_bitrates < sband->n_bitrates)
1274 max_bitrates = sband->n_bitrates;
1275 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1276 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1277
1278 for_each_sband_iftype_data(sband, i, iftd) {
1279 u8 he_40_mhz_cap;
1280
1281 supp_he = supp_he || iftd->he_cap.has_he;
1282 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1283
1284 if (band == NL80211_BAND_2GHZ)
1285 he_40_mhz_cap =
1286 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1287 else
1288 he_40_mhz_cap =
1289 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1290
1291 /* currently no support for HE client where HT has 40 MHz but not HT */
1292 if (iftd->he_cap.has_he &&
1293 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1294 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1295 sband->ht_cap.ht_supported &&
1296 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1297 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1298 return -EINVAL;
1299
1300 /* no support for per-band vendor elems with MLO */
1301 if (WARN_ON(iftd->vendor_elems.len &&
1302 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1303 return -EINVAL;
1304 }
1305
1306 /* HT, VHT, HE require QoS, thus >= 4 queues */
1307 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1308 (supp_ht || supp_vht || supp_he)))
1309 return -EINVAL;
1310
1311 /* EHT requires HE support */
1312 if (WARN_ON(supp_eht && !supp_he))
1313 return -EINVAL;
1314
1315 if (!sband->ht_cap.ht_supported)
1316 continue;
1317
1318 /* TODO: consider VHT for RX chains, hopefully it's the same */
1319 local->rx_chains =
1320 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1321 local->rx_chains);
1322
1323 /* no need to mask, SM_PS_DISABLED has all bits set */
1324 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1325 IEEE80211_HT_CAP_SM_PS_SHIFT;
1326 }
1327
1328 /* if low-level driver supports AP, we also support VLAN.
1329 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1330 * based on their support to transmit SW encrypted packets.
1331 */
1332 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1333 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1334 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1335 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1336 }
1337
1338 /* mac80211 always supports monitor */
1339 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1340 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1341
1342
1343 local->int_scan_req = kzalloc(struct_size(local->int_scan_req,
1344 channels, channels),
1345 GFP_KERNEL);
1346 if (!local->int_scan_req)
1347 return -ENOMEM;
1348
1349 eth_broadcast_addr(local->int_scan_req->bssid);
1350
1351 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1352 if (!local->hw.wiphy->bands[band])
1353 continue;
1354 local->int_scan_req->rates[band] = (u32) -1;
1355 }
1356
1357 #ifndef CONFIG_MAC80211_MESH
1358 /* mesh depends on Kconfig, but drivers should set it if they want */
1359 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1360 #endif
1361
1362 /* if the underlying driver supports mesh, mac80211 will (at least)
1363 * provide routing of mesh authentication frames to userspace */
1364 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1365 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1366
1367 /* mac80211 supports control port protocol changing */
1368 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1369
1370 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1371 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1372 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1373 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1374 if (hw->max_signal <= 0) {
1375 result = -EINVAL;
1376 goto fail_workqueue;
1377 }
1378 }
1379
1380 /* Mac80211 and therefore all drivers using SW crypto only
1381 * are able to handle PTK rekeys and Extended Key ID.
1382 */
1383 if (!local->ops->set_key) {
1384 wiphy_ext_feature_set(local->hw.wiphy,
1385 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1386 wiphy_ext_feature_set(local->hw.wiphy,
1387 NL80211_EXT_FEATURE_EXT_KEY_ID);
1388 }
1389
1390 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1391 wiphy_ext_feature_set(local->hw.wiphy,
1392 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1393
1394 /*
1395 * Calculate scan IE length -- we need this to alloc
1396 * memory and to subtract from the driver limit. It
1397 * includes the DS Params, (extended) supported rates, and HT
1398 * information -- SSID is the driver's responsibility.
1399 */
1400 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1401 3 /* DS Params */;
1402 if (supp_ht)
1403 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1404
1405 if (supp_vht)
1406 local->scan_ies_len +=
1407 2 + sizeof(struct ieee80211_vht_cap);
1408
1409 /*
1410 * HE cap element is variable in size - set len to allow max size */
1411 if (supp_he) {
1412 local->scan_ies_len +=
1413 3 + sizeof(struct ieee80211_he_cap_elem) +
1414 sizeof(struct ieee80211_he_mcs_nss_supp) +
1415 IEEE80211_HE_PPE_THRES_MAX_LEN;
1416
1417 if (supp_eht)
1418 local->scan_ies_len +=
1419 3 + sizeof(struct ieee80211_eht_cap_elem) +
1420 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1421 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1422 }
1423
1424 if (!local->ops->hw_scan) {
1425 /* For hw_scan, driver needs to set these up. */
1426 local->hw.wiphy->max_scan_ssids = 4;
1427 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1428 }
1429
1430 /*
1431 * If the driver supports any scan IEs, then assume the
1432 * limit includes the IEs mac80211 will add, otherwise
1433 * leave it at zero and let the driver sort it out; we
1434 * still pass our IEs to the driver but userspace will
1435 * not be allowed to in that case.
1436 */
1437 if (local->hw.wiphy->max_scan_ie_len)
1438 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1439
1440 result = ieee80211_init_cipher_suites(local);
1441 if (result < 0)
1442 goto fail_workqueue;
1443
1444 if (!local->ops->remain_on_channel)
1445 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1446
1447 /* mac80211 based drivers don't support internal TDLS setup */
1448 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1449 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1450
1451 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1452 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1453 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1454
1455 /* mac80211 supports multi BSSID, if the driver supports it */
1456 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1457 local->hw.wiphy->support_mbssid = true;
1458 if (ieee80211_hw_check(&local->hw,
1459 SUPPORTS_ONLY_HE_MULTI_BSSID))
1460 local->hw.wiphy->support_only_he_mbssid = true;
1461 else
1462 local->ext_capa[2] |=
1463 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1464 }
1465
1466 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1467
1468 /*
1469 * We use the number of queues for feature tests (QoS, HT) internally
1470 * so restrict them appropriately.
1471 */
1472 if (hw->queues > IEEE80211_MAX_QUEUES)
1473 hw->queues = IEEE80211_MAX_QUEUES;
1474
1475 local->workqueue =
1476 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1477 if (!local->workqueue) {
1478 result = -ENOMEM;
1479 goto fail_workqueue;
1480 }
1481
1482 /*
1483 * The hardware needs headroom for sending the frame,
1484 * and we need some headroom for passing the frame to monitor
1485 * interfaces, but never both at the same time.
1486 */
1487 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1488 IEEE80211_TX_STATUS_HEADROOM);
1489
1490 /*
1491 * if the driver doesn't specify a max listen interval we
1492 * use 5 which should be a safe default
1493 */
1494 if (local->hw.max_listen_interval == 0)
1495 local->hw.max_listen_interval = 5;
1496
1497 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1498
1499 local->dynamic_ps_forced_timeout = -1;
1500
1501 if (!local->hw.max_nan_de_entries)
1502 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1503
1504 if (!local->hw.weight_multiplier)
1505 local->hw.weight_multiplier = 1;
1506
1507 ieee80211_wep_init(local);
1508
1509 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1510
1511 ieee80211_led_init(local);
1512
1513 result = ieee80211_txq_setup_flows(local);
1514 if (result)
1515 goto fail_flows;
1516
1517 rtnl_lock();
1518 result = ieee80211_init_rate_ctrl_alg(local,
1519 hw->rate_control_algorithm);
1520 rtnl_unlock();
1521 if (result < 0) {
1522 wiphy_debug(local->hw.wiphy,
1523 "Failed to initialize rate control algorithm\n");
1524 goto fail_rate;
1525 }
1526
1527 if (local->rate_ctrl) {
1528 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1529 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1530 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1531 }
1532
1533 /*
1534 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1535 * or have it when we don't, copy the sband structure and set/clear it.
1536 * This is necessary because rate scaling algorithms could be switched
1537 * and have different support values.
1538 * Print a message so that in the common case the reallocation can be
1539 * avoided.
1540 */
1541 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1542 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1543 struct ieee80211_supported_band *sband;
1544 bool local_cap, ie_cap;
1545
1546 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1547
1548 sband = local->hw.wiphy->bands[band];
1549 if (!sband || !sband->vht_cap.vht_supported)
1550 continue;
1551
1552 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1553 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1554
1555 if (local_cap == ie_cap)
1556 continue;
1557
1558 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1559 if (!sband) {
1560 result = -ENOMEM;
1561 goto fail_rate;
1562 }
1563
1564 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1565 band);
1566
1567 sband->vht_cap.vht_mcs.tx_highest ^=
1568 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1569
1570 local->hw.wiphy->bands[band] = sband;
1571 local->sband_allocated |= BIT(band);
1572 }
1573
1574 result = wiphy_register(local->hw.wiphy);
1575 if (result < 0)
1576 goto fail_wiphy_register;
1577
1578 debugfs_hw_add(local);
1579 rate_control_add_debugfs(local);
1580
1581 ieee80211_check_wbrf_support(local);
1582
1583 rtnl_lock();
1584 wiphy_lock(hw->wiphy);
1585
1586 /* add one default STA interface if supported */
1587 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1588 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1589 struct vif_params params = {0};
1590
1591 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1592 NL80211_IFTYPE_STATION, ¶ms);
1593 if (result)
1594 wiphy_warn(local->hw.wiphy,
1595 "Failed to add default virtual iface\n");
1596 }
1597
1598 wiphy_unlock(hw->wiphy);
1599 rtnl_unlock();
1600
1601 #ifdef CONFIG_INET
1602 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1603 result = register_inetaddr_notifier(&local->ifa_notifier);
1604 if (result)
1605 goto fail_ifa;
1606 #endif
1607
1608 #if IS_ENABLED(CONFIG_IPV6)
1609 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1610 result = register_inet6addr_notifier(&local->ifa6_notifier);
1611 if (result)
1612 goto fail_ifa6;
1613 #endif
1614
1615 return 0;
1616
1617 #if IS_ENABLED(CONFIG_IPV6)
1618 fail_ifa6:
1619 #ifdef CONFIG_INET
1620 unregister_inetaddr_notifier(&local->ifa_notifier);
1621 #endif
1622 #endif
1623 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1624 fail_ifa:
1625 #endif
1626 wiphy_unregister(local->hw.wiphy);
1627 fail_wiphy_register:
1628 rtnl_lock();
1629 rate_control_deinitialize(local);
1630 ieee80211_remove_interfaces(local);
1631 rtnl_unlock();
1632 fail_rate:
1633 ieee80211_txq_teardown_flows(local);
1634 fail_flows:
1635 ieee80211_led_exit(local);
1636 destroy_workqueue(local->workqueue);
1637 fail_workqueue:
1638 kfree(local->int_scan_req);
1639 return result;
1640 }
1641 EXPORT_SYMBOL(ieee80211_register_hw);
1642
ieee80211_unregister_hw(struct ieee80211_hw * hw)1643 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1644 {
1645 struct ieee80211_local *local = hw_to_local(hw);
1646
1647 tasklet_kill(&local->tx_pending_tasklet);
1648 tasklet_kill(&local->tasklet);
1649
1650 #ifdef CONFIG_INET
1651 unregister_inetaddr_notifier(&local->ifa_notifier);
1652 #endif
1653 #if IS_ENABLED(CONFIG_IPV6)
1654 unregister_inet6addr_notifier(&local->ifa6_notifier);
1655 #endif
1656
1657 rtnl_lock();
1658
1659 /*
1660 * At this point, interface list manipulations are fine
1661 * because the driver cannot be handing us frames any
1662 * more and the tasklet is killed.
1663 */
1664 ieee80211_remove_interfaces(local);
1665
1666 ieee80211_txq_teardown_flows(local);
1667
1668 wiphy_lock(local->hw.wiphy);
1669 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1670 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1671 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1672 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1673 wiphy_unlock(local->hw.wiphy);
1674 rtnl_unlock();
1675
1676 cancel_work_sync(&local->restart_work);
1677
1678 ieee80211_clear_tx_pending(local);
1679 rate_control_deinitialize(local);
1680
1681 if (skb_queue_len(&local->skb_queue) ||
1682 skb_queue_len(&local->skb_queue_unreliable))
1683 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1684 skb_queue_purge(&local->skb_queue);
1685 skb_queue_purge(&local->skb_queue_unreliable);
1686
1687 wiphy_unregister(local->hw.wiphy);
1688 destroy_workqueue(local->workqueue);
1689 ieee80211_led_exit(local);
1690 kfree(local->int_scan_req);
1691 }
1692 EXPORT_SYMBOL(ieee80211_unregister_hw);
1693
ieee80211_free_ack_frame(int id,void * p,void * data)1694 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1695 {
1696 WARN_ONCE(1, "Have pending ack frames!\n");
1697 kfree_skb(p);
1698 return 0;
1699 }
1700
ieee80211_free_hw(struct ieee80211_hw * hw)1701 void ieee80211_free_hw(struct ieee80211_hw *hw)
1702 {
1703 struct ieee80211_local *local = hw_to_local(hw);
1704 enum nl80211_band band;
1705
1706 mutex_destroy(&local->iflist_mtx);
1707
1708 idr_for_each(&local->ack_status_frames,
1709 ieee80211_free_ack_frame, NULL);
1710 idr_destroy(&local->ack_status_frames);
1711
1712 sta_info_stop(local);
1713
1714 ieee80211_free_led_names(local);
1715
1716 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1717 if (!(local->sband_allocated & BIT(band)))
1718 continue;
1719 kfree(local->hw.wiphy->bands[band]);
1720 }
1721
1722 wiphy_free(local->hw.wiphy);
1723 }
1724 EXPORT_SYMBOL(ieee80211_free_hw);
1725 #define V(x) #x,
1726 static const char * const drop_reasons_unusable[] = {
1727 [0] = "RX_DROP_UNUSABLE",
1728 MAC80211_DROP_REASONS_UNUSABLE(V)
1729 #undef V
1730 };
1731
1732 static struct drop_reason_list drop_reason_list_unusable = {
1733 .reasons = drop_reasons_unusable,
1734 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1735 };
1736
ieee80211_init(void)1737 static int __init ieee80211_init(void)
1738 {
1739 struct sk_buff *skb;
1740 int ret;
1741
1742 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1743 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1744 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1745
1746 ret = rc80211_minstrel_init();
1747 if (ret)
1748 return ret;
1749
1750 ret = ieee80211_iface_init();
1751 if (ret)
1752 goto err_netdev;
1753
1754 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1755 &drop_reason_list_unusable);
1756
1757 return 0;
1758 err_netdev:
1759 rc80211_minstrel_exit();
1760
1761 return ret;
1762 }
1763
ieee80211_exit(void)1764 static void __exit ieee80211_exit(void)
1765 {
1766 rc80211_minstrel_exit();
1767
1768 ieee80211s_stop();
1769
1770 ieee80211_iface_exit();
1771
1772 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1773
1774 rcu_barrier();
1775 }
1776
1777
1778 subsys_initcall(ieee80211_init);
1779 module_exit(ieee80211_exit);
1780
1781 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1782 MODULE_LICENSE("GPL");
1783