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) 2018-2023 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 ||
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
171 rcu_read_lock();
172 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
173 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
174 continue;
175 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
176 continue;
177 if (sdata->vif.bss_conf.txpower == INT_MIN)
178 continue;
179 power = min(power, sdata->vif.bss_conf.txpower);
180 }
181 rcu_read_unlock();
182
183 if (local->hw.conf.power_level != power) {
184 changed |= IEEE80211_CONF_CHANGE_POWER;
185 local->hw.conf.power_level = power;
186 }
187
188 return changed;
189 }
190
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)191 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
192 {
193 int ret = 0;
194
195 might_sleep();
196
197 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
198 IEEE80211_CONF_CHANGE_POWER |
199 IEEE80211_CONF_CHANGE_SMPS));
200
201 if (changed && local->open_count) {
202 ret = drv_config(local, changed);
203 /*
204 * Goal:
205 * HW reconfiguration should never fail, the driver has told
206 * us what it can support so it should live up to that promise.
207 *
208 * Current status:
209 * rfkill is not integrated with mac80211 and a
210 * configuration command can thus fail if hardware rfkill
211 * is enabled
212 *
213 * FIXME: integrate rfkill with mac80211 and then add this
214 * WARN_ON() back
215 *
216 */
217 /* WARN_ON(ret); */
218 }
219
220 return ret;
221 }
222
223 /* for scanning, offchannel and chanctx emulation only */
_ieee80211_hw_conf_chan(struct ieee80211_local * local,struct ieee80211_chanctx_conf * ctx)224 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
225 struct ieee80211_chanctx_conf *ctx)
226 {
227 u32 changed;
228
229 if (!local->open_count)
230 return 0;
231
232 changed = ieee80211_calc_hw_conf_chan(local, ctx);
233 if (!changed)
234 return 0;
235
236 return drv_config(local, changed);
237 }
238
ieee80211_hw_conf_chan(struct ieee80211_local * local)239 int ieee80211_hw_conf_chan(struct ieee80211_local *local)
240 {
241 struct ieee80211_chanctx *ctx;
242
243 ctx = list_first_entry_or_null(&local->chanctx_list,
244 struct ieee80211_chanctx,
245 list);
246
247 return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL);
248 }
249
ieee80211_hw_conf_init(struct ieee80211_local * local)250 void ieee80211_hw_conf_init(struct ieee80211_local *local)
251 {
252 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
253 IEEE80211_CONF_CHANGE_POWER |
254 IEEE80211_CONF_CHANGE_SMPS);
255
256 if (WARN_ON(!local->open_count))
257 return;
258
259 if (local->emulate_chanctx) {
260 struct ieee80211_chanctx *ctx;
261
262 ctx = list_first_entry_or_null(&local->chanctx_list,
263 struct ieee80211_chanctx,
264 list);
265
266 changed |= ieee80211_calc_hw_conf_chan(local,
267 ctx ? &ctx->conf : NULL);
268 }
269
270 WARN_ON(drv_config(local, changed));
271 }
272
ieee80211_emulate_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)273 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
274 struct ieee80211_chanctx_conf *ctx)
275 {
276 struct ieee80211_local *local = hw_to_local(hw);
277
278 local->hw.conf.radar_enabled = ctx->radar_enabled;
279
280 return _ieee80211_hw_conf_chan(local, ctx);
281 }
282 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
283
ieee80211_emulate_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)284 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
285 struct ieee80211_chanctx_conf *ctx)
286 {
287 struct ieee80211_local *local = hw_to_local(hw);
288
289 local->hw.conf.radar_enabled = false;
290
291 _ieee80211_hw_conf_chan(local, NULL);
292 }
293 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
294
ieee80211_emulate_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx,u32 changed)295 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
296 struct ieee80211_chanctx_conf *ctx,
297 u32 changed)
298 {
299 struct ieee80211_local *local = hw_to_local(hw);
300
301 local->hw.conf.radar_enabled = ctx->radar_enabled;
302
303 _ieee80211_hw_conf_chan(local, ctx);
304 }
305 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
306
ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif_chanctx_switch * vifs,int n_vifs,enum ieee80211_chanctx_switch_mode mode)307 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
308 struct ieee80211_vif_chanctx_switch *vifs,
309 int n_vifs,
310 enum ieee80211_chanctx_switch_mode mode)
311 {
312 struct ieee80211_local *local = hw_to_local(hw);
313
314 if (n_vifs <= 0)
315 return -EINVAL;
316
317 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
318 _ieee80211_hw_conf_chan(local, vifs[0].new_ctx);
319
320 return 0;
321 }
322 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
323
324 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
325 BSS_CHANGED_IDLE |\
326 BSS_CHANGED_PS |\
327 BSS_CHANGED_IBSS |\
328 BSS_CHANGED_ARP_FILTER |\
329 BSS_CHANGED_SSID |\
330 BSS_CHANGED_MLD_VALID_LINKS |\
331 BSS_CHANGED_MLD_TTLM)
332
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)333 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
334 u64 changed)
335 {
336 struct ieee80211_local *local = sdata->local;
337
338 might_sleep();
339
340 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
341 return;
342
343 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
344 BSS_CHANGED_BEACON_ENABLED) &&
345 sdata->vif.type != NL80211_IFTYPE_AP &&
346 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
347 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
348 sdata->vif.type != NL80211_IFTYPE_OCB))
349 return;
350
351 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
352 sdata->vif.type == NL80211_IFTYPE_NAN ||
353 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
354 !sdata->vif.bss_conf.mu_mimo_owner &&
355 !(changed & BSS_CHANGED_TXPOWER))))
356 return;
357
358 if (!check_sdata_in_driver(sdata))
359 return;
360
361 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
362 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
363
364 trace_drv_vif_cfg_changed(local, sdata, changed);
365 if (local->ops->vif_cfg_changed)
366 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
367 }
368
369 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
370 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
371
372 /* FIXME: should be for each link */
373 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
374 changed);
375 if (local->ops->link_info_changed)
376 local->ops->link_info_changed(&local->hw, &sdata->vif,
377 &sdata->vif.bss_conf, ch);
378 }
379
380 if (local->ops->bss_info_changed)
381 local->ops->bss_info_changed(&local->hw, &sdata->vif,
382 &sdata->vif.bss_conf, changed);
383 trace_drv_return_void(local);
384 }
385
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)386 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
387 u64 changed)
388 {
389 struct ieee80211_local *local = sdata->local;
390
391 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
392
393 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
394 return;
395
396 drv_vif_cfg_changed(local, sdata, changed);
397 }
398
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)399 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
400 struct ieee80211_link_data *link,
401 u64 changed)
402 {
403 struct ieee80211_local *local = sdata->local;
404
405 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
406
407 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
408 return;
409
410 if (!check_sdata_in_driver(sdata))
411 return;
412
413 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
414 }
415
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)416 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
417 {
418 sdata->vif.bss_conf.use_cts_prot = false;
419 sdata->vif.bss_conf.use_short_preamble = false;
420 sdata->vif.bss_conf.use_short_slot = false;
421 return BSS_CHANGED_ERP_CTS_PROT |
422 BSS_CHANGED_ERP_PREAMBLE |
423 BSS_CHANGED_ERP_SLOT;
424 }
425
ieee80211_handle_queued_frames(struct ieee80211_local * local)426 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
427 {
428 struct sk_buff *skb;
429
430 while ((skb = skb_dequeue(&local->skb_queue)) ||
431 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
432 switch (skb->pkt_type) {
433 case IEEE80211_RX_MSG:
434 /* Clear skb->pkt_type in order to not confuse kernel
435 * netstack. */
436 skb->pkt_type = 0;
437 ieee80211_rx(&local->hw, skb);
438 break;
439 case IEEE80211_TX_STATUS_MSG:
440 skb->pkt_type = 0;
441 ieee80211_tx_status_skb(&local->hw, skb);
442 break;
443 default:
444 WARN(1, "mac80211: Packet is of unknown type %d\n",
445 skb->pkt_type);
446 dev_kfree_skb(skb);
447 break;
448 }
449 }
450 }
451
ieee80211_tasklet_handler(struct tasklet_struct * t)452 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
453 {
454 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
455
456 ieee80211_handle_queued_frames(local);
457 }
458
ieee80211_restart_work(struct work_struct * work)459 static void ieee80211_restart_work(struct work_struct *work)
460 {
461 struct ieee80211_local *local =
462 container_of(work, struct ieee80211_local, restart_work);
463 struct ieee80211_sub_if_data *sdata;
464 int ret;
465
466 flush_workqueue(local->workqueue);
467
468 rtnl_lock();
469 /* we might do interface manipulations, so need both */
470 wiphy_lock(local->hw.wiphy);
471 wiphy_work_flush(local->hw.wiphy, NULL);
472
473 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
474 "%s called with hardware scan in progress\n", __func__);
475
476 list_for_each_entry(sdata, &local->interfaces, list) {
477 /*
478 * XXX: there may be more work for other vif types and even
479 * for station mode: a good thing would be to run most of
480 * the iface type's dependent _stop (ieee80211_mg_stop,
481 * ieee80211_ibss_stop) etc...
482 * For now, fix only the specific bug that was seen: race
483 * between csa_connection_drop_work and us.
484 */
485 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
486 /*
487 * This worker is scheduled from the iface worker that
488 * runs on mac80211's workqueue, so we can't be
489 * scheduling this worker after the cancel right here.
490 * The exception is ieee80211_chswitch_done.
491 * Then we can have a race...
492 */
493 wiphy_work_cancel(local->hw.wiphy,
494 &sdata->u.mgd.csa_connection_drop_work);
495 if (sdata->vif.bss_conf.csa_active)
496 ieee80211_sta_connection_lost(sdata,
497 WLAN_REASON_UNSPECIFIED,
498 false);
499 }
500 wiphy_delayed_work_flush(local->hw.wiphy,
501 &sdata->dec_tailroom_needed_wk);
502 }
503 ieee80211_scan_cancel(local);
504
505 /* make sure any new ROC will consider local->in_reconfig */
506 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
507 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
508
509 /* wait for all packet processing to be done */
510 synchronize_net();
511
512 ret = ieee80211_reconfig(local);
513 wiphy_unlock(local->hw.wiphy);
514
515 if (ret)
516 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
517
518 rtnl_unlock();
519 }
520
ieee80211_restart_hw(struct ieee80211_hw * hw)521 void ieee80211_restart_hw(struct ieee80211_hw *hw)
522 {
523 struct ieee80211_local *local = hw_to_local(hw);
524
525 trace_api_restart_hw(local);
526
527 wiphy_info(hw->wiphy,
528 "Hardware restart was requested\n");
529
530 /* use this reason, ieee80211_reconfig will unblock it */
531 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
532 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
533 false);
534
535 /*
536 * Stop all Rx during the reconfig. We don't want state changes
537 * or driver callbacks while this is in progress.
538 */
539 local->in_reconfig = true;
540 barrier();
541
542 queue_work(system_freezable_wq, &local->restart_work);
543 }
544 EXPORT_SYMBOL(ieee80211_restart_hw);
545
546 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)547 static int ieee80211_ifa_changed(struct notifier_block *nb,
548 unsigned long data, void *arg)
549 {
550 struct in_ifaddr *ifa = arg;
551 struct ieee80211_local *local =
552 container_of(nb, struct ieee80211_local,
553 ifa_notifier);
554 struct net_device *ndev = ifa->ifa_dev->dev;
555 struct wireless_dev *wdev = ndev->ieee80211_ptr;
556 struct in_device *idev;
557 struct ieee80211_sub_if_data *sdata;
558 struct ieee80211_vif_cfg *vif_cfg;
559 struct ieee80211_if_managed *ifmgd;
560 int c = 0;
561
562 /* Make sure it's our interface that got changed */
563 if (!wdev)
564 return NOTIFY_DONE;
565
566 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
567 return NOTIFY_DONE;
568
569 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
570 vif_cfg = &sdata->vif.cfg;
571
572 /* ARP filtering is only supported in managed mode */
573 if (sdata->vif.type != NL80211_IFTYPE_STATION)
574 return NOTIFY_DONE;
575
576 idev = __in_dev_get_rtnl(sdata->dev);
577 if (!idev)
578 return NOTIFY_DONE;
579
580 ifmgd = &sdata->u.mgd;
581
582 /*
583 * The nested here is needed to convince lockdep that this is
584 * all OK. Yes, we lock the wiphy mutex here while we already
585 * hold the notifier rwsem, that's the normal case. And yes,
586 * we also acquire the notifier rwsem again when unregistering
587 * a netdev while we already hold the wiphy mutex, so it does
588 * look like a typical ABBA deadlock.
589 *
590 * However, both of these things happen with the RTNL held
591 * already. Therefore, they can't actually happen, since the
592 * lock orders really are ABC and ACB, which is fine due to
593 * the RTNL (A).
594 *
595 * We still need to prevent recursion, which is accomplished
596 * by the !wdev->registered check above.
597 */
598 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
599 __acquire(&local->hw.wiphy->mtx);
600
601 /* Copy the addresses to the vif config list */
602 ifa = rtnl_dereference(idev->ifa_list);
603 while (ifa) {
604 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
605 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
606 ifa = rtnl_dereference(ifa->ifa_next);
607 c++;
608 }
609
610 vif_cfg->arp_addr_cnt = c;
611
612 /* Configure driver only if associated (which also implies it is up) */
613 if (ifmgd->associated)
614 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
615
616 wiphy_unlock(local->hw.wiphy);
617
618 return NOTIFY_OK;
619 }
620 #endif
621
622 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)623 static int ieee80211_ifa6_changed(struct notifier_block *nb,
624 unsigned long data, void *arg)
625 {
626 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
627 struct inet6_dev *idev = ifa->idev;
628 struct net_device *ndev = ifa->idev->dev;
629 struct ieee80211_local *local =
630 container_of(nb, struct ieee80211_local, ifa6_notifier);
631 struct wireless_dev *wdev = ndev->ieee80211_ptr;
632 struct ieee80211_sub_if_data *sdata;
633
634 /* Make sure it's our interface that got changed */
635 if (!wdev || wdev->wiphy != local->hw.wiphy)
636 return NOTIFY_DONE;
637
638 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
639
640 /*
641 * For now only support station mode. This is mostly because
642 * doing AP would have to handle AP_VLAN in some way ...
643 */
644 if (sdata->vif.type != NL80211_IFTYPE_STATION)
645 return NOTIFY_DONE;
646
647 drv_ipv6_addr_change(local, sdata, idev);
648
649 return NOTIFY_OK;
650 }
651 #endif
652
653 /* There isn't a lot of sense in it, but you can transmit anything you like */
654 static const struct ieee80211_txrx_stypes
655 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
656 [NL80211_IFTYPE_ADHOC] = {
657 .tx = 0xffff,
658 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
659 BIT(IEEE80211_STYPE_AUTH >> 4) |
660 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
661 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
662 },
663 [NL80211_IFTYPE_STATION] = {
664 .tx = 0xffff,
665 /*
666 * To support Pre Association Security Negotiation (PASN) while
667 * already associated to one AP, allow user space to register to
668 * Rx authentication frames, so that the user space logic would
669 * be able to receive/handle authentication frames from a
670 * different AP as part of PASN.
671 * It is expected that user space would intelligently register
672 * for Rx authentication frames, i.e., only when PASN is used
673 * and configure a match filter only for PASN authentication
674 * algorithm, as otherwise the MLME functionality of mac80211
675 * would be broken.
676 */
677 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
678 BIT(IEEE80211_STYPE_AUTH >> 4) |
679 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
680 },
681 [NL80211_IFTYPE_AP] = {
682 .tx = 0xffff,
683 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
684 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
685 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
686 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
687 BIT(IEEE80211_STYPE_AUTH >> 4) |
688 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
689 BIT(IEEE80211_STYPE_ACTION >> 4),
690 },
691 [NL80211_IFTYPE_AP_VLAN] = {
692 /* copy AP */
693 .tx = 0xffff,
694 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
695 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
696 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
697 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
698 BIT(IEEE80211_STYPE_AUTH >> 4) |
699 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
700 BIT(IEEE80211_STYPE_ACTION >> 4),
701 },
702 [NL80211_IFTYPE_P2P_CLIENT] = {
703 .tx = 0xffff,
704 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
705 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
706 },
707 [NL80211_IFTYPE_P2P_GO] = {
708 .tx = 0xffff,
709 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
710 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
711 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
712 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
713 BIT(IEEE80211_STYPE_AUTH >> 4) |
714 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
715 BIT(IEEE80211_STYPE_ACTION >> 4),
716 },
717 [NL80211_IFTYPE_MESH_POINT] = {
718 .tx = 0xffff,
719 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
720 BIT(IEEE80211_STYPE_AUTH >> 4) |
721 BIT(IEEE80211_STYPE_DEAUTH >> 4),
722 },
723 [NL80211_IFTYPE_P2P_DEVICE] = {
724 .tx = 0xffff,
725 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
726 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
727 },
728 };
729
730 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
731 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
732 IEEE80211_HT_AMPDU_PARM_DENSITY,
733
734 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
735 IEEE80211_HT_CAP_MAX_AMSDU |
736 IEEE80211_HT_CAP_SGI_20 |
737 IEEE80211_HT_CAP_SGI_40 |
738 IEEE80211_HT_CAP_TX_STBC |
739 IEEE80211_HT_CAP_RX_STBC |
740 IEEE80211_HT_CAP_LDPC_CODING |
741 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
742 .mcs = {
743 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
744 0xff, 0xff, 0xff, 0xff, 0xff, },
745 },
746 };
747
748 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
749 .vht_cap_info =
750 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
751 IEEE80211_VHT_CAP_SHORT_GI_80 |
752 IEEE80211_VHT_CAP_SHORT_GI_160 |
753 IEEE80211_VHT_CAP_RXSTBC_MASK |
754 IEEE80211_VHT_CAP_TXSTBC |
755 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
756 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
757 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
758 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
759 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
760 .supp_mcs = {
761 .rx_mcs_map = cpu_to_le16(~0),
762 .tx_mcs_map = cpu_to_le16(~0),
763 },
764 };
765
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)766 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
767 const struct ieee80211_ops *ops,
768 const char *requested_name)
769 {
770 struct ieee80211_local *local;
771 int priv_size, i;
772 struct wiphy *wiphy;
773 bool emulate_chanctx;
774
775 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
776 !ops->add_interface || !ops->remove_interface ||
777 !ops->configure_filter || !ops->wake_tx_queue))
778 return NULL;
779
780 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
781 return NULL;
782
783 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
784 (ops->link_info_changed && ops->bss_info_changed)))
785 return NULL;
786
787 /* check all or no channel context operations exist */
788 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
789 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
790 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
791 if (WARN_ON(ops->assign_vif_chanctx ||
792 ops->unassign_vif_chanctx))
793 return NULL;
794 emulate_chanctx = true;
795 } else {
796 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
797 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
798 ops->change_chanctx == ieee80211_emulate_change_chanctx))
799 return NULL;
800 if (WARN_ON(!ops->add_chanctx ||
801 !ops->remove_chanctx ||
802 !ops->change_chanctx ||
803 !ops->assign_vif_chanctx ||
804 !ops->unassign_vif_chanctx))
805 return NULL;
806 emulate_chanctx = false;
807 }
808
809 /* Ensure 32-byte alignment of our private data and hw private data.
810 * We use the wiphy priv data for both our ieee80211_local and for
811 * the driver's private data
812 *
813 * In memory it'll be like this:
814 *
815 * +-------------------------+
816 * | struct wiphy |
817 * +-------------------------+
818 * | struct ieee80211_local |
819 * +-------------------------+
820 * | driver's private data |
821 * +-------------------------+
822 *
823 */
824 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
825
826 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
827
828 if (!wiphy)
829 return NULL;
830
831 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
832
833 wiphy->privid = mac80211_wiphy_privid;
834
835 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
836 WIPHY_FLAG_4ADDR_AP |
837 WIPHY_FLAG_4ADDR_STATION |
838 WIPHY_FLAG_REPORTS_OBSS |
839 WIPHY_FLAG_OFFCHAN_TX;
840
841 if (emulate_chanctx || ops->remain_on_channel)
842 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
843
844 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
845 NL80211_FEATURE_SAE |
846 NL80211_FEATURE_HT_IBSS |
847 NL80211_FEATURE_VIF_TXPOWER |
848 NL80211_FEATURE_MAC_ON_CREATE |
849 NL80211_FEATURE_USERSPACE_MPM |
850 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
851 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
852 wiphy_ext_feature_set(wiphy,
853 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
854 wiphy_ext_feature_set(wiphy,
855 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
856 wiphy_ext_feature_set(wiphy,
857 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
858 wiphy_ext_feature_set(wiphy,
859 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
860 wiphy_ext_feature_set(wiphy,
861 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
862
863 if (!ops->hw_scan) {
864 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
865 NL80211_FEATURE_AP_SCAN;
866 /*
867 * if the driver behaves correctly using the probe request
868 * (template) from mac80211, then both of these should be
869 * supported even with hw scan - but let drivers opt in.
870 */
871 wiphy_ext_feature_set(wiphy,
872 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
873 wiphy_ext_feature_set(wiphy,
874 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
875 }
876
877 if (!ops->set_key) {
878 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
879 wiphy_ext_feature_set(wiphy,
880 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
881 }
882
883 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
884 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
885
886 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
887
888 local = wiphy_priv(wiphy);
889
890 if (sta_info_init(local))
891 goto err_free;
892
893 local->hw.wiphy = wiphy;
894
895 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
896
897 local->ops = ops;
898 local->emulate_chanctx = emulate_chanctx;
899
900 if (emulate_chanctx)
901 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
902
903 /*
904 * We need a bit of data queued to build aggregates properly, so
905 * instruct the TCP stack to allow more than a single ms of data
906 * to be queued in the stack. The value is a bit-shift of 1
907 * second, so 7 is ~8ms of queued data. Only affects local TCP
908 * sockets.
909 * This is the default, anyhow - drivers may need to override it
910 * for local reasons (longer buffers, longer completion time, or
911 * similar).
912 */
913 local->hw.tx_sk_pacing_shift = 7;
914
915 /* set up some defaults */
916 local->hw.queues = 1;
917 local->hw.max_rates = 1;
918 local->hw.max_report_rates = 0;
919 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
920 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
921 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
922 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
923 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
924 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
925 IEEE80211_RADIOTAP_MCS_HAVE_GI |
926 IEEE80211_RADIOTAP_MCS_HAVE_BW;
927 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
928 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
929 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
930 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
931 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
932 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
933 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
934 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
935
936 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
937
938 wiphy->extended_capabilities = local->ext_capa;
939 wiphy->extended_capabilities_mask = local->ext_capa;
940 wiphy->extended_capabilities_len =
941 ARRAY_SIZE(local->ext_capa);
942
943 INIT_LIST_HEAD(&local->interfaces);
944 INIT_LIST_HEAD(&local->mon_list);
945
946 __hw_addr_init(&local->mc_list);
947
948 mutex_init(&local->iflist_mtx);
949 spin_lock_init(&local->filter_lock);
950 spin_lock_init(&local->rx_path_lock);
951 spin_lock_init(&local->queue_stop_reason_lock);
952
953 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
954 INIT_LIST_HEAD(&local->active_txqs[i]);
955 spin_lock_init(&local->active_txq_lock[i]);
956 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
957 local->aql_txq_limit_high[i] =
958 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
959 atomic_set(&local->aql_ac_pending_airtime[i], 0);
960 }
961
962 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
963 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
964 atomic_set(&local->aql_total_pending_airtime, 0);
965
966 spin_lock_init(&local->handle_wake_tx_queue_lock);
967
968 INIT_LIST_HEAD(&local->chanctx_list);
969
970 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
971
972 INIT_WORK(&local->restart_work, ieee80211_restart_work);
973
974 wiphy_work_init(&local->radar_detected_work,
975 ieee80211_dfs_radar_detected_work);
976
977 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
978
979 wiphy_work_init(&local->dynamic_ps_enable_work,
980 ieee80211_dynamic_ps_enable_work);
981 wiphy_work_init(&local->dynamic_ps_disable_work,
982 ieee80211_dynamic_ps_disable_work);
983 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
984
985 wiphy_work_init(&local->sched_scan_stopped_work,
986 ieee80211_sched_scan_stopped_work);
987
988 spin_lock_init(&local->ack_status_lock);
989 idr_init(&local->ack_status_frames);
990
991 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
992 skb_queue_head_init(&local->pending[i]);
993 atomic_set(&local->agg_queue_stop[i], 0);
994 }
995 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
996 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
997 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
998
999 skb_queue_head_init(&local->skb_queue);
1000 skb_queue_head_init(&local->skb_queue_unreliable);
1001
1002 ieee80211_alloc_led_names(local);
1003
1004 ieee80211_roc_setup(local);
1005
1006 local->hw.radiotap_timestamp.units_pos = -1;
1007 local->hw.radiotap_timestamp.accuracy = -1;
1008
1009 return &local->hw;
1010 err_free:
1011 wiphy_free(wiphy);
1012 return NULL;
1013 }
1014 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1015
ieee80211_init_cipher_suites(struct ieee80211_local * local)1016 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1017 {
1018 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
1019 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1020 int r = 0, w = 0;
1021 u32 *suites;
1022 static const u32 cipher_suites[] = {
1023 /* keep WEP first, it may be removed below */
1024 WLAN_CIPHER_SUITE_WEP40,
1025 WLAN_CIPHER_SUITE_WEP104,
1026 WLAN_CIPHER_SUITE_TKIP,
1027 WLAN_CIPHER_SUITE_CCMP,
1028 WLAN_CIPHER_SUITE_CCMP_256,
1029 WLAN_CIPHER_SUITE_GCMP,
1030 WLAN_CIPHER_SUITE_GCMP_256,
1031
1032 /* keep last -- depends on hw flags! */
1033 WLAN_CIPHER_SUITE_AES_CMAC,
1034 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1035 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1036 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1037 };
1038
1039 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
1040 local->hw.wiphy->cipher_suites) {
1041 /* If the driver advertises, or doesn't support SW crypto,
1042 * we only need to remove WEP if necessary.
1043 */
1044 if (have_wep)
1045 return 0;
1046
1047 /* well if it has _no_ ciphers ... fine */
1048 if (!local->hw.wiphy->n_cipher_suites)
1049 return 0;
1050
1051 /* Driver provides cipher suites, but we need to exclude WEP */
1052 suites = kmemdup(local->hw.wiphy->cipher_suites,
1053 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
1054 GFP_KERNEL);
1055 if (!suites)
1056 return -ENOMEM;
1057
1058 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
1059 u32 suite = local->hw.wiphy->cipher_suites[r];
1060
1061 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
1062 suite == WLAN_CIPHER_SUITE_WEP104)
1063 continue;
1064 suites[w++] = suite;
1065 }
1066 } else {
1067 /* assign the (software supported and perhaps offloaded)
1068 * cipher suites
1069 */
1070 local->hw.wiphy->cipher_suites = cipher_suites;
1071 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1072
1073 if (!have_mfp)
1074 local->hw.wiphy->n_cipher_suites -= 4;
1075
1076 if (!have_wep) {
1077 local->hw.wiphy->cipher_suites += 2;
1078 local->hw.wiphy->n_cipher_suites -= 2;
1079 }
1080
1081 /* not dynamically allocated, so just return */
1082 return 0;
1083 }
1084
1085 local->hw.wiphy->cipher_suites = suites;
1086 local->hw.wiphy->n_cipher_suites = w;
1087 local->wiphy_ciphers_allocated = true;
1088
1089 return 0;
1090 }
1091
ieee80211_register_hw(struct ieee80211_hw * hw)1092 int ieee80211_register_hw(struct ieee80211_hw *hw)
1093 {
1094 struct ieee80211_local *local = hw_to_local(hw);
1095 int result, i;
1096 enum nl80211_band band;
1097 int channels, max_bitrates;
1098 bool supp_ht, supp_vht, supp_he, supp_eht;
1099 struct cfg80211_chan_def dflt_chandef = {};
1100
1101 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1102 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1103 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1104 return -EINVAL;
1105
1106 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1107 (!local->ops->tdls_channel_switch ||
1108 !local->ops->tdls_cancel_channel_switch ||
1109 !local->ops->tdls_recv_channel_switch))
1110 return -EOPNOTSUPP;
1111
1112 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1113 !local->ops->set_frag_threshold))
1114 return -EINVAL;
1115
1116 if (WARN_ON(local->hw.wiphy->interface_modes &
1117 BIT(NL80211_IFTYPE_NAN) &&
1118 (!local->ops->start_nan || !local->ops->stop_nan)))
1119 return -EINVAL;
1120
1121 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1122 /*
1123 * For drivers capable of doing MLO, assume modern driver
1124 * or firmware facilities, so software doesn't have to do
1125 * as much, e.g. monitoring beacons would be hard if we
1126 * might not even know which link is active at which time.
1127 */
1128 if (WARN_ON(local->emulate_chanctx))
1129 return -EINVAL;
1130
1131 if (WARN_ON(!local->ops->link_info_changed))
1132 return -EINVAL;
1133
1134 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1135 return -EINVAL;
1136
1137 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1138 return -EINVAL;
1139
1140 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1141 return -EINVAL;
1142
1143 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1144 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1145 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1146 return -EINVAL;
1147
1148 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1149 return -EINVAL;
1150
1151 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1152 return -EINVAL;
1153
1154 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1155 return -EINVAL;
1156
1157 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1158 return -EINVAL;
1159
1160 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1161 return -EINVAL;
1162
1163 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1164 return -EINVAL;
1165 }
1166
1167 #ifdef CONFIG_PM
1168 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1169 return -EINVAL;
1170 #endif
1171
1172 if (local->emulate_chanctx) {
1173 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1174 const struct ieee80211_iface_combination *comb;
1175
1176 comb = &local->hw.wiphy->iface_combinations[i];
1177
1178 if (comb->num_different_channels > 1)
1179 return -EINVAL;
1180 }
1181 } else {
1182 /* DFS is not supported with multi-channel combinations yet */
1183 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1184 const struct ieee80211_iface_combination *comb;
1185
1186 comb = &local->hw.wiphy->iface_combinations[i];
1187
1188 if (comb->radar_detect_widths &&
1189 comb->num_different_channels > 1)
1190 return -EINVAL;
1191 }
1192 }
1193
1194 /* Only HW csum features are currently compatible with mac80211 */
1195 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1196 return -EINVAL;
1197
1198 if (hw->max_report_rates == 0)
1199 hw->max_report_rates = hw->max_rates;
1200
1201 local->rx_chains = 1;
1202
1203 /*
1204 * generic code guarantees at least one band,
1205 * set this very early because much code assumes
1206 * that hw.conf.channel is assigned
1207 */
1208 channels = 0;
1209 max_bitrates = 0;
1210 supp_ht = false;
1211 supp_vht = false;
1212 supp_he = false;
1213 supp_eht = false;
1214 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1215 const struct ieee80211_sband_iftype_data *iftd;
1216 struct ieee80211_supported_band *sband;
1217
1218 sband = local->hw.wiphy->bands[band];
1219 if (!sband)
1220 continue;
1221
1222 if (!dflt_chandef.chan) {
1223 /*
1224 * Assign the first enabled channel to dflt_chandef
1225 * from the list of channels
1226 */
1227 for (i = 0; i < sband->n_channels; i++)
1228 if (!(sband->channels[i].flags &
1229 IEEE80211_CHAN_DISABLED))
1230 break;
1231 /* if none found then use the first anyway */
1232 if (i == sband->n_channels)
1233 i = 0;
1234 cfg80211_chandef_create(&dflt_chandef,
1235 &sband->channels[i],
1236 NL80211_CHAN_NO_HT);
1237 /* init channel we're on */
1238 local->monitor_chanreq.oper = dflt_chandef;
1239 if (local->emulate_chanctx) {
1240 local->dflt_chandef = dflt_chandef;
1241 local->hw.conf.chandef = dflt_chandef;
1242 }
1243 }
1244
1245 channels += sband->n_channels;
1246
1247 /*
1248 * Due to the way the aggregation code handles this and it
1249 * being an HT capability, we can't really support delayed
1250 * BA in MLO (yet).
1251 */
1252 if (WARN_ON(sband->ht_cap.ht_supported &&
1253 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1254 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1255 return -EINVAL;
1256
1257 if (max_bitrates < sband->n_bitrates)
1258 max_bitrates = sband->n_bitrates;
1259 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1260 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1261
1262 for_each_sband_iftype_data(sband, i, iftd) {
1263 u8 he_40_mhz_cap;
1264
1265 supp_he = supp_he || iftd->he_cap.has_he;
1266 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1267
1268 if (band == NL80211_BAND_2GHZ)
1269 he_40_mhz_cap =
1270 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1271 else
1272 he_40_mhz_cap =
1273 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1274
1275 /* currently no support for HE client where HT has 40 MHz but not HT */
1276 if (iftd->he_cap.has_he &&
1277 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1278 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1279 sband->ht_cap.ht_supported &&
1280 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1281 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1282 return -EINVAL;
1283 }
1284
1285 /* HT, VHT, HE require QoS, thus >= 4 queues */
1286 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1287 (supp_ht || supp_vht || supp_he)))
1288 return -EINVAL;
1289
1290 /* EHT requires HE support */
1291 if (WARN_ON(supp_eht && !supp_he))
1292 return -EINVAL;
1293
1294 if (!sband->ht_cap.ht_supported)
1295 continue;
1296
1297 /* TODO: consider VHT for RX chains, hopefully it's the same */
1298 local->rx_chains =
1299 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1300 local->rx_chains);
1301
1302 /* no need to mask, SM_PS_DISABLED has all bits set */
1303 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1304 IEEE80211_HT_CAP_SM_PS_SHIFT;
1305 }
1306
1307 /* if low-level driver supports AP, we also support VLAN.
1308 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1309 * based on their support to transmit SW encrypted packets.
1310 */
1311 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1312 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1313 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1314 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1315 }
1316
1317 /* mac80211 always supports monitor */
1318 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1319 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1320
1321 /* mac80211 doesn't support more than one IBSS interface right now */
1322 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1323 const struct ieee80211_iface_combination *c;
1324 int j;
1325
1326 c = &hw->wiphy->iface_combinations[i];
1327
1328 for (j = 0; j < c->n_limits; j++)
1329 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1330 c->limits[j].max > 1)
1331 return -EINVAL;
1332 }
1333
1334 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1335 sizeof(void *) * channels, GFP_KERNEL);
1336 if (!local->int_scan_req)
1337 return -ENOMEM;
1338
1339 eth_broadcast_addr(local->int_scan_req->bssid);
1340
1341 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1342 if (!local->hw.wiphy->bands[band])
1343 continue;
1344 local->int_scan_req->rates[band] = (u32) -1;
1345 }
1346
1347 #ifndef CONFIG_MAC80211_MESH
1348 /* mesh depends on Kconfig, but drivers should set it if they want */
1349 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1350 #endif
1351
1352 /* if the underlying driver supports mesh, mac80211 will (at least)
1353 * provide routing of mesh authentication frames to userspace */
1354 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1355 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1356
1357 /* mac80211 supports control port protocol changing */
1358 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1359
1360 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1361 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1362 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1363 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1364 if (hw->max_signal <= 0) {
1365 result = -EINVAL;
1366 goto fail_workqueue;
1367 }
1368 }
1369
1370 /* Mac80211 and therefore all drivers using SW crypto only
1371 * are able to handle PTK rekeys and Extended Key ID.
1372 */
1373 if (!local->ops->set_key) {
1374 wiphy_ext_feature_set(local->hw.wiphy,
1375 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1376 wiphy_ext_feature_set(local->hw.wiphy,
1377 NL80211_EXT_FEATURE_EXT_KEY_ID);
1378 }
1379
1380 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1381 wiphy_ext_feature_set(local->hw.wiphy,
1382 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1383
1384 /*
1385 * Calculate scan IE length -- we need this to alloc
1386 * memory and to subtract from the driver limit. It
1387 * includes the DS Params, (extended) supported rates, and HT
1388 * information -- SSID is the driver's responsibility.
1389 */
1390 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1391 3 /* DS Params */;
1392 if (supp_ht)
1393 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1394
1395 if (supp_vht)
1396 local->scan_ies_len +=
1397 2 + sizeof(struct ieee80211_vht_cap);
1398
1399 /*
1400 * HE cap element is variable in size - set len to allow max size */
1401 if (supp_he) {
1402 local->scan_ies_len +=
1403 3 + sizeof(struct ieee80211_he_cap_elem) +
1404 sizeof(struct ieee80211_he_mcs_nss_supp) +
1405 IEEE80211_HE_PPE_THRES_MAX_LEN;
1406
1407 if (supp_eht)
1408 local->scan_ies_len +=
1409 3 + sizeof(struct ieee80211_eht_cap_elem) +
1410 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1411 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1412 }
1413
1414 if (!local->ops->hw_scan) {
1415 /* For hw_scan, driver needs to set these up. */
1416 local->hw.wiphy->max_scan_ssids = 4;
1417 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1418 }
1419
1420 /*
1421 * If the driver supports any scan IEs, then assume the
1422 * limit includes the IEs mac80211 will add, otherwise
1423 * leave it at zero and let the driver sort it out; we
1424 * still pass our IEs to the driver but userspace will
1425 * not be allowed to in that case.
1426 */
1427 if (local->hw.wiphy->max_scan_ie_len)
1428 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1429
1430 result = ieee80211_init_cipher_suites(local);
1431 if (result < 0)
1432 goto fail_workqueue;
1433
1434 if (!local->ops->remain_on_channel)
1435 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1436
1437 /* mac80211 based drivers don't support internal TDLS setup */
1438 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1439 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1440
1441 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1442 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1443 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1444
1445 /* mac80211 supports multi BSSID, if the driver supports it */
1446 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1447 local->hw.wiphy->support_mbssid = true;
1448 if (ieee80211_hw_check(&local->hw,
1449 SUPPORTS_ONLY_HE_MULTI_BSSID))
1450 local->hw.wiphy->support_only_he_mbssid = true;
1451 else
1452 local->ext_capa[2] |=
1453 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1454 }
1455
1456 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1457
1458 /*
1459 * We use the number of queues for feature tests (QoS, HT) internally
1460 * so restrict them appropriately.
1461 */
1462 if (hw->queues > IEEE80211_MAX_QUEUES)
1463 hw->queues = IEEE80211_MAX_QUEUES;
1464
1465 local->workqueue =
1466 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1467 if (!local->workqueue) {
1468 result = -ENOMEM;
1469 goto fail_workqueue;
1470 }
1471
1472 /*
1473 * The hardware needs headroom for sending the frame,
1474 * and we need some headroom for passing the frame to monitor
1475 * interfaces, but never both at the same time.
1476 */
1477 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1478 IEEE80211_TX_STATUS_HEADROOM);
1479
1480 /*
1481 * if the driver doesn't specify a max listen interval we
1482 * use 5 which should be a safe default
1483 */
1484 if (local->hw.max_listen_interval == 0)
1485 local->hw.max_listen_interval = 5;
1486
1487 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1488
1489 local->dynamic_ps_forced_timeout = -1;
1490
1491 if (!local->hw.max_nan_de_entries)
1492 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1493
1494 if (!local->hw.weight_multiplier)
1495 local->hw.weight_multiplier = 1;
1496
1497 ieee80211_wep_init(local);
1498
1499 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1500
1501 ieee80211_led_init(local);
1502
1503 result = ieee80211_txq_setup_flows(local);
1504 if (result)
1505 goto fail_flows;
1506
1507 rtnl_lock();
1508 result = ieee80211_init_rate_ctrl_alg(local,
1509 hw->rate_control_algorithm);
1510 rtnl_unlock();
1511 if (result < 0) {
1512 wiphy_debug(local->hw.wiphy,
1513 "Failed to initialize rate control algorithm\n");
1514 goto fail_rate;
1515 }
1516
1517 if (local->rate_ctrl) {
1518 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1519 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1520 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1521 }
1522
1523 /*
1524 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1525 * or have it when we don't, copy the sband structure and set/clear it.
1526 * This is necessary because rate scaling algorithms could be switched
1527 * and have different support values.
1528 * Print a message so that in the common case the reallocation can be
1529 * avoided.
1530 */
1531 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1532 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1533 struct ieee80211_supported_band *sband;
1534 bool local_cap, ie_cap;
1535
1536 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1537
1538 sband = local->hw.wiphy->bands[band];
1539 if (!sband || !sband->vht_cap.vht_supported)
1540 continue;
1541
1542 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1543 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1544
1545 if (local_cap == ie_cap)
1546 continue;
1547
1548 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1549 if (!sband) {
1550 result = -ENOMEM;
1551 goto fail_rate;
1552 }
1553
1554 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1555 band);
1556
1557 sband->vht_cap.vht_mcs.tx_highest ^=
1558 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1559
1560 local->hw.wiphy->bands[band] = sband;
1561 local->sband_allocated |= BIT(band);
1562 }
1563
1564 result = wiphy_register(local->hw.wiphy);
1565 if (result < 0)
1566 goto fail_wiphy_register;
1567
1568 debugfs_hw_add(local);
1569 rate_control_add_debugfs(local);
1570
1571 ieee80211_check_wbrf_support(local);
1572
1573 rtnl_lock();
1574 wiphy_lock(hw->wiphy);
1575
1576 /* add one default STA interface if supported */
1577 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1578 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1579 struct vif_params params = {0};
1580
1581 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1582 NL80211_IFTYPE_STATION, ¶ms);
1583 if (result)
1584 wiphy_warn(local->hw.wiphy,
1585 "Failed to add default virtual iface\n");
1586 }
1587
1588 wiphy_unlock(hw->wiphy);
1589 rtnl_unlock();
1590
1591 #ifdef CONFIG_INET
1592 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1593 result = register_inetaddr_notifier(&local->ifa_notifier);
1594 if (result)
1595 goto fail_ifa;
1596 #endif
1597
1598 #if IS_ENABLED(CONFIG_IPV6)
1599 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1600 result = register_inet6addr_notifier(&local->ifa6_notifier);
1601 if (result)
1602 goto fail_ifa6;
1603 #endif
1604
1605 return 0;
1606
1607 #if IS_ENABLED(CONFIG_IPV6)
1608 fail_ifa6:
1609 #ifdef CONFIG_INET
1610 unregister_inetaddr_notifier(&local->ifa_notifier);
1611 #endif
1612 #endif
1613 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1614 fail_ifa:
1615 #endif
1616 wiphy_unregister(local->hw.wiphy);
1617 fail_wiphy_register:
1618 rtnl_lock();
1619 rate_control_deinitialize(local);
1620 ieee80211_remove_interfaces(local);
1621 rtnl_unlock();
1622 fail_rate:
1623 ieee80211_txq_teardown_flows(local);
1624 fail_flows:
1625 ieee80211_led_exit(local);
1626 destroy_workqueue(local->workqueue);
1627 fail_workqueue:
1628 if (local->wiphy_ciphers_allocated) {
1629 kfree(local->hw.wiphy->cipher_suites);
1630 local->wiphy_ciphers_allocated = false;
1631 }
1632 kfree(local->int_scan_req);
1633 return result;
1634 }
1635 EXPORT_SYMBOL(ieee80211_register_hw);
1636
ieee80211_unregister_hw(struct ieee80211_hw * hw)1637 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1638 {
1639 struct ieee80211_local *local = hw_to_local(hw);
1640
1641 tasklet_kill(&local->tx_pending_tasklet);
1642 tasklet_kill(&local->tasklet);
1643
1644 #ifdef CONFIG_INET
1645 unregister_inetaddr_notifier(&local->ifa_notifier);
1646 #endif
1647 #if IS_ENABLED(CONFIG_IPV6)
1648 unregister_inet6addr_notifier(&local->ifa6_notifier);
1649 #endif
1650
1651 rtnl_lock();
1652
1653 /*
1654 * At this point, interface list manipulations are fine
1655 * because the driver cannot be handing us frames any
1656 * more and the tasklet is killed.
1657 */
1658 ieee80211_remove_interfaces(local);
1659
1660 ieee80211_txq_teardown_flows(local);
1661
1662 wiphy_lock(local->hw.wiphy);
1663 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1664 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1665 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1666 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1667 wiphy_unlock(local->hw.wiphy);
1668 rtnl_unlock();
1669
1670 cancel_work_sync(&local->restart_work);
1671
1672 ieee80211_clear_tx_pending(local);
1673 rate_control_deinitialize(local);
1674
1675 if (skb_queue_len(&local->skb_queue) ||
1676 skb_queue_len(&local->skb_queue_unreliable))
1677 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1678 skb_queue_purge(&local->skb_queue);
1679 skb_queue_purge(&local->skb_queue_unreliable);
1680
1681 wiphy_unregister(local->hw.wiphy);
1682 destroy_workqueue(local->workqueue);
1683 ieee80211_led_exit(local);
1684 kfree(local->int_scan_req);
1685 }
1686 EXPORT_SYMBOL(ieee80211_unregister_hw);
1687
ieee80211_free_ack_frame(int id,void * p,void * data)1688 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1689 {
1690 WARN_ONCE(1, "Have pending ack frames!\n");
1691 kfree_skb(p);
1692 return 0;
1693 }
1694
ieee80211_free_hw(struct ieee80211_hw * hw)1695 void ieee80211_free_hw(struct ieee80211_hw *hw)
1696 {
1697 struct ieee80211_local *local = hw_to_local(hw);
1698 enum nl80211_band band;
1699
1700 mutex_destroy(&local->iflist_mtx);
1701
1702 if (local->wiphy_ciphers_allocated) {
1703 kfree(local->hw.wiphy->cipher_suites);
1704 local->wiphy_ciphers_allocated = false;
1705 }
1706
1707 idr_for_each(&local->ack_status_frames,
1708 ieee80211_free_ack_frame, NULL);
1709 idr_destroy(&local->ack_status_frames);
1710
1711 sta_info_stop(local);
1712
1713 ieee80211_free_led_names(local);
1714
1715 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1716 if (!(local->sband_allocated & BIT(band)))
1717 continue;
1718 kfree(local->hw.wiphy->bands[band]);
1719 }
1720
1721 wiphy_free(local->hw.wiphy);
1722 }
1723 EXPORT_SYMBOL(ieee80211_free_hw);
1724
1725 static const char * const drop_reasons_monitor[] = {
1726 #define V(x) #x,
1727 [0] = "RX_DROP_MONITOR",
1728 MAC80211_DROP_REASONS_MONITOR(V)
1729 };
1730
1731 static struct drop_reason_list drop_reason_list_monitor = {
1732 .reasons = drop_reasons_monitor,
1733 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1734 };
1735
1736 static const char * const drop_reasons_unusable[] = {
1737 [0] = "RX_DROP_UNUSABLE",
1738 MAC80211_DROP_REASONS_UNUSABLE(V)
1739 #undef V
1740 };
1741
1742 static struct drop_reason_list drop_reason_list_unusable = {
1743 .reasons = drop_reasons_unusable,
1744 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1745 };
1746
ieee80211_init(void)1747 static int __init ieee80211_init(void)
1748 {
1749 struct sk_buff *skb;
1750 int ret;
1751
1752 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1753 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1754 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1755
1756 ret = rc80211_minstrel_init();
1757 if (ret)
1758 return ret;
1759
1760 ret = ieee80211_iface_init();
1761 if (ret)
1762 goto err_netdev;
1763
1764 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1765 &drop_reason_list_monitor);
1766 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1767 &drop_reason_list_unusable);
1768
1769 return 0;
1770 err_netdev:
1771 rc80211_minstrel_exit();
1772
1773 return ret;
1774 }
1775
ieee80211_exit(void)1776 static void __exit ieee80211_exit(void)
1777 {
1778 rc80211_minstrel_exit();
1779
1780 ieee80211s_stop();
1781
1782 ieee80211_iface_exit();
1783
1784 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1785 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1786
1787 rcu_barrier();
1788 }
1789
1790
1791 subsys_initcall(ieee80211_init);
1792 module_exit(ieee80211_exit);
1793
1794 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1795 MODULE_LICENSE("GPL");
1796