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
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
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
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
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
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 */
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
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
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
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
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
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
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
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 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif));
341
342 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
343 return;
344
345 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
346 BSS_CHANGED_BEACON_ENABLED) &&
347 sdata->vif.type != NL80211_IFTYPE_AP &&
348 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
349 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
350 sdata->vif.type != NL80211_IFTYPE_OCB))
351 return;
352
353 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
354 sdata->vif.type == NL80211_IFTYPE_NAN ||
355 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
356 !sdata->vif.bss_conf.mu_mimo_owner &&
357 !(changed & BSS_CHANGED_TXPOWER))))
358 return;
359
360 if (!check_sdata_in_driver(sdata))
361 return;
362
363 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
364 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
365
366 trace_drv_vif_cfg_changed(local, sdata, changed);
367 if (local->ops->vif_cfg_changed)
368 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
369 }
370
371 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
372 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
373
374 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
375 changed);
376 if (local->ops->link_info_changed)
377 local->ops->link_info_changed(&local->hw, &sdata->vif,
378 &sdata->vif.bss_conf, ch);
379 }
380
381 if (local->ops->bss_info_changed)
382 local->ops->bss_info_changed(&local->hw, &sdata->vif,
383 &sdata->vif.bss_conf, changed);
384 trace_drv_return_void(local);
385 }
386
387 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
388 u64 changed)
389 {
390 struct ieee80211_local *local = sdata->local;
391
392 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
393
394 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
395 return;
396
397 drv_vif_cfg_changed(local, sdata, changed);
398 }
399
400 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
401 struct ieee80211_link_data *link,
402 u64 changed)
403 {
404 struct ieee80211_local *local = sdata->local;
405
406 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
407
408 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
409 return;
410
411 if (!check_sdata_in_driver(sdata))
412 return;
413
414 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
415 }
416
417 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
418 {
419 sdata->vif.bss_conf.use_cts_prot = false;
420 sdata->vif.bss_conf.use_short_preamble = false;
421 sdata->vif.bss_conf.use_short_slot = false;
422 return BSS_CHANGED_ERP_CTS_PROT |
423 BSS_CHANGED_ERP_PREAMBLE |
424 BSS_CHANGED_ERP_SLOT;
425 }
426
427 /* context: requires softirqs disabled */
428 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
429 {
430 struct sk_buff *skb;
431
432 while ((skb = skb_dequeue(&local->skb_queue)) ||
433 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
434 switch (skb->pkt_type) {
435 case IEEE80211_RX_MSG:
436 /* Clear skb->pkt_type in order to not confuse kernel
437 * netstack. */
438 skb->pkt_type = 0;
439 ieee80211_rx(&local->hw, skb);
440 break;
441 case IEEE80211_TX_STATUS_MSG:
442 skb->pkt_type = 0;
443 ieee80211_tx_status_skb(&local->hw, skb);
444 break;
445 default:
446 WARN(1, "mac80211: Packet is of unknown type %d\n",
447 skb->pkt_type);
448 dev_kfree_skb(skb);
449 break;
450 }
451 }
452 }
453
454 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
455 {
456 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
457
458 ieee80211_handle_queued_frames(local);
459 }
460
461 static void ieee80211_restart_work(struct work_struct *work)
462 {
463 struct ieee80211_local *local =
464 container_of(work, struct ieee80211_local, restart_work);
465 struct ieee80211_sub_if_data *sdata;
466 int ret;
467
468 flush_workqueue(local->workqueue);
469
470 rtnl_lock();
471 /* we might do interface manipulations, so need both */
472 wiphy_lock(local->hw.wiphy);
473 wiphy_work_flush(local->hw.wiphy, NULL);
474
475 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
476 "%s called with hardware scan in progress\n", __func__);
477
478 list_for_each_entry(sdata, &local->interfaces, list) {
479 /*
480 * XXX: there may be more work for other vif types and even
481 * for station mode: a good thing would be to run most of
482 * the iface type's dependent _stop (ieee80211_mg_stop,
483 * ieee80211_ibss_stop) etc...
484 * For now, fix only the specific bug that was seen: race
485 * between csa_connection_drop_work and us.
486 */
487 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
488 /*
489 * This worker is scheduled from the iface worker that
490 * runs on mac80211's workqueue, so we can't be
491 * scheduling this worker after the cancel right here.
492 * The exception is ieee80211_chswitch_done.
493 * Then we can have a race...
494 */
495 wiphy_work_cancel(local->hw.wiphy,
496 &sdata->u.mgd.csa_connection_drop_work);
497 if (sdata->vif.bss_conf.csa_active)
498 ieee80211_sta_connection_lost(sdata,
499 WLAN_REASON_UNSPECIFIED,
500 false);
501 }
502 wiphy_delayed_work_flush(local->hw.wiphy,
503 &sdata->dec_tailroom_needed_wk);
504 }
505 ieee80211_scan_cancel(local);
506
507 /* make sure any new ROC will consider local->in_reconfig */
508 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
509 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
510
511 /* wait for all packet processing to be done */
512 synchronize_net();
513
514 ret = ieee80211_reconfig(local);
515 wiphy_unlock(local->hw.wiphy);
516
517 if (ret)
518 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
519
520 rtnl_unlock();
521 }
522
523 void ieee80211_restart_hw(struct ieee80211_hw *hw)
524 {
525 struct ieee80211_local *local = hw_to_local(hw);
526
527 trace_api_restart_hw(local);
528
529 wiphy_info(hw->wiphy,
530 "Hardware restart was requested\n");
531
532 /* use this reason, ieee80211_reconfig will unblock it */
533 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
534 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
535 false);
536
537 /*
538 * Stop all Rx during the reconfig. We don't want state changes
539 * or driver callbacks while this is in progress.
540 */
541 local->in_reconfig = true;
542 barrier();
543
544 queue_work(system_freezable_wq, &local->restart_work);
545 }
546 EXPORT_SYMBOL(ieee80211_restart_hw);
547
548 #ifdef CONFIG_INET
549 static int ieee80211_ifa_changed(struct notifier_block *nb,
550 unsigned long data, void *arg)
551 {
552 struct in_ifaddr *ifa = arg;
553 struct ieee80211_local *local =
554 container_of(nb, struct ieee80211_local,
555 ifa_notifier);
556 struct net_device *ndev = ifa->ifa_dev->dev;
557 struct wireless_dev *wdev = ndev->ieee80211_ptr;
558 struct in_device *idev;
559 struct ieee80211_sub_if_data *sdata;
560 struct ieee80211_vif_cfg *vif_cfg;
561 struct ieee80211_if_managed *ifmgd;
562 int c = 0;
563
564 /* Make sure it's our interface that got changed */
565 if (!wdev)
566 return NOTIFY_DONE;
567
568 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
569 return NOTIFY_DONE;
570
571 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
572 vif_cfg = &sdata->vif.cfg;
573
574 /* ARP filtering is only supported in managed mode */
575 if (sdata->vif.type != NL80211_IFTYPE_STATION)
576 return NOTIFY_DONE;
577
578 idev = __in_dev_get_rtnl(sdata->dev);
579 if (!idev)
580 return NOTIFY_DONE;
581
582 ifmgd = &sdata->u.mgd;
583
584 /*
585 * The nested here is needed to convince lockdep that this is
586 * all OK. Yes, we lock the wiphy mutex here while we already
587 * hold the notifier rwsem, that's the normal case. And yes,
588 * we also acquire the notifier rwsem again when unregistering
589 * a netdev while we already hold the wiphy mutex, so it does
590 * look like a typical ABBA deadlock.
591 *
592 * However, both of these things happen with the RTNL held
593 * already. Therefore, they can't actually happen, since the
594 * lock orders really are ABC and ACB, which is fine due to
595 * the RTNL (A).
596 *
597 * We still need to prevent recursion, which is accomplished
598 * by the !wdev->registered check above.
599 */
600 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
601 __acquire(&local->hw.wiphy->mtx);
602
603 /* Copy the addresses to the vif config list */
604 ifa = rtnl_dereference(idev->ifa_list);
605 while (ifa) {
606 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
607 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
608 ifa = rtnl_dereference(ifa->ifa_next);
609 c++;
610 }
611
612 vif_cfg->arp_addr_cnt = c;
613
614 /* Configure driver only if associated (which also implies it is up) */
615 if (ifmgd->associated)
616 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
617
618 wiphy_unlock(local->hw.wiphy);
619
620 return NOTIFY_OK;
621 }
622 #endif
623
624 #if IS_ENABLED(CONFIG_IPV6)
625 static int ieee80211_ifa6_changed(struct notifier_block *nb,
626 unsigned long data, void *arg)
627 {
628 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
629 struct inet6_dev *idev = ifa->idev;
630 struct net_device *ndev = ifa->idev->dev;
631 struct ieee80211_local *local =
632 container_of(nb, struct ieee80211_local, ifa6_notifier);
633 struct wireless_dev *wdev = ndev->ieee80211_ptr;
634 struct ieee80211_sub_if_data *sdata;
635
636 /* Make sure it's our interface that got changed */
637 if (!wdev || wdev->wiphy != local->hw.wiphy)
638 return NOTIFY_DONE;
639
640 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
641
642 /*
643 * For now only support station mode. This is mostly because
644 * doing AP would have to handle AP_VLAN in some way ...
645 */
646 if (sdata->vif.type != NL80211_IFTYPE_STATION)
647 return NOTIFY_DONE;
648
649 drv_ipv6_addr_change(local, sdata, idev);
650
651 return NOTIFY_OK;
652 }
653 #endif
654
655 /* There isn't a lot of sense in it, but you can transmit anything you like */
656 static const struct ieee80211_txrx_stypes
657 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
658 [NL80211_IFTYPE_ADHOC] = {
659 .tx = 0xffff,
660 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
661 BIT(IEEE80211_STYPE_AUTH >> 4) |
662 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
663 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
664 },
665 [NL80211_IFTYPE_STATION] = {
666 .tx = 0xffff,
667 /*
668 * To support Pre Association Security Negotiation (PASN) while
669 * already associated to one AP, allow user space to register to
670 * Rx authentication frames, so that the user space logic would
671 * be able to receive/handle authentication frames from a
672 * different AP as part of PASN.
673 * It is expected that user space would intelligently register
674 * for Rx authentication frames, i.e., only when PASN is used
675 * and configure a match filter only for PASN authentication
676 * algorithm, as otherwise the MLME functionality of mac80211
677 * would be broken.
678 */
679 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
680 BIT(IEEE80211_STYPE_AUTH >> 4) |
681 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
682 },
683 [NL80211_IFTYPE_AP] = {
684 .tx = 0xffff,
685 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
686 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
687 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
688 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
689 BIT(IEEE80211_STYPE_AUTH >> 4) |
690 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
691 BIT(IEEE80211_STYPE_ACTION >> 4),
692 },
693 [NL80211_IFTYPE_AP_VLAN] = {
694 /* copy AP */
695 .tx = 0xffff,
696 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
697 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
698 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
699 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
700 BIT(IEEE80211_STYPE_AUTH >> 4) |
701 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
702 BIT(IEEE80211_STYPE_ACTION >> 4),
703 },
704 [NL80211_IFTYPE_P2P_CLIENT] = {
705 .tx = 0xffff,
706 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
707 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
708 },
709 [NL80211_IFTYPE_P2P_GO] = {
710 .tx = 0xffff,
711 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
712 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
713 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
714 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
715 BIT(IEEE80211_STYPE_AUTH >> 4) |
716 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
717 BIT(IEEE80211_STYPE_ACTION >> 4),
718 },
719 [NL80211_IFTYPE_MESH_POINT] = {
720 .tx = 0xffff,
721 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
722 BIT(IEEE80211_STYPE_AUTH >> 4) |
723 BIT(IEEE80211_STYPE_DEAUTH >> 4),
724 },
725 [NL80211_IFTYPE_P2P_DEVICE] = {
726 .tx = 0xffff,
727 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
728 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
729 },
730 };
731
732 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
733 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
734 IEEE80211_HT_AMPDU_PARM_DENSITY,
735
736 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
737 IEEE80211_HT_CAP_MAX_AMSDU |
738 IEEE80211_HT_CAP_SGI_20 |
739 IEEE80211_HT_CAP_SGI_40 |
740 IEEE80211_HT_CAP_TX_STBC |
741 IEEE80211_HT_CAP_RX_STBC |
742 IEEE80211_HT_CAP_LDPC_CODING |
743 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
744 .mcs = {
745 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
746 0xff, 0xff, 0xff, 0xff, 0xff, },
747 },
748 };
749
750 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
751 .vht_cap_info =
752 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
753 IEEE80211_VHT_CAP_SHORT_GI_80 |
754 IEEE80211_VHT_CAP_SHORT_GI_160 |
755 IEEE80211_VHT_CAP_RXSTBC_MASK |
756 IEEE80211_VHT_CAP_TXSTBC |
757 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
758 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
759 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
760 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
761 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
762 .supp_mcs = {
763 .rx_mcs_map = cpu_to_le16(~0),
764 .tx_mcs_map = cpu_to_le16(~0),
765 },
766 };
767
768 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
769 const struct ieee80211_ops *ops,
770 const char *requested_name)
771 {
772 struct ieee80211_local *local;
773 int priv_size, i;
774 struct wiphy *wiphy;
775 bool emulate_chanctx;
776
777 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
778 !ops->add_interface || !ops->remove_interface ||
779 !ops->configure_filter || !ops->wake_tx_queue))
780 return NULL;
781
782 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
783 return NULL;
784
785 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
786 (ops->link_info_changed && ops->bss_info_changed)))
787 return NULL;
788
789 /* check all or no channel context operations exist */
790 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
791 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
792 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
793 if (WARN_ON(ops->assign_vif_chanctx ||
794 ops->unassign_vif_chanctx))
795 return NULL;
796 emulate_chanctx = true;
797 } else {
798 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
799 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
800 ops->change_chanctx == ieee80211_emulate_change_chanctx))
801 return NULL;
802 if (WARN_ON(!ops->add_chanctx ||
803 !ops->remove_chanctx ||
804 !ops->change_chanctx ||
805 !ops->assign_vif_chanctx ||
806 !ops->unassign_vif_chanctx))
807 return NULL;
808 emulate_chanctx = false;
809 }
810
811 /* Ensure 32-byte alignment of our private data and hw private data.
812 * We use the wiphy priv data for both our ieee80211_local and for
813 * the driver's private data
814 *
815 * In memory it'll be like this:
816 *
817 * +-------------------------+
818 * | struct wiphy |
819 * +-------------------------+
820 * | struct ieee80211_local |
821 * +-------------------------+
822 * | driver's private data |
823 * +-------------------------+
824 *
825 */
826 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
827
828 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
829
830 if (!wiphy)
831 return NULL;
832
833 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
834
835 wiphy->privid = mac80211_wiphy_privid;
836
837 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
838 WIPHY_FLAG_4ADDR_AP |
839 WIPHY_FLAG_4ADDR_STATION |
840 WIPHY_FLAG_REPORTS_OBSS |
841 WIPHY_FLAG_OFFCHAN_TX;
842
843 if (emulate_chanctx || ops->remain_on_channel)
844 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
845
846 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
847 NL80211_FEATURE_SAE |
848 NL80211_FEATURE_HT_IBSS |
849 NL80211_FEATURE_VIF_TXPOWER |
850 NL80211_FEATURE_MAC_ON_CREATE |
851 NL80211_FEATURE_USERSPACE_MPM |
852 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
853 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
854 wiphy_ext_feature_set(wiphy,
855 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
856 wiphy_ext_feature_set(wiphy,
857 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
858 wiphy_ext_feature_set(wiphy,
859 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
860 wiphy_ext_feature_set(wiphy,
861 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
862 wiphy_ext_feature_set(wiphy,
863 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
864
865 if (!ops->hw_scan) {
866 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
867 NL80211_FEATURE_AP_SCAN;
868 /*
869 * if the driver behaves correctly using the probe request
870 * (template) from mac80211, then both of these should be
871 * supported even with hw scan - but let drivers opt in.
872 */
873 wiphy_ext_feature_set(wiphy,
874 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
875 wiphy_ext_feature_set(wiphy,
876 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
877 }
878
879 if (!ops->set_key) {
880 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
881 wiphy_ext_feature_set(wiphy,
882 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
883 }
884
885 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
886 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
887
888 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
889
890 local = wiphy_priv(wiphy);
891
892 if (sta_info_init(local))
893 goto err_free;
894
895 local->hw.wiphy = wiphy;
896
897 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
898
899 local->ops = ops;
900 local->emulate_chanctx = emulate_chanctx;
901
902 if (emulate_chanctx)
903 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
904
905 /*
906 * We need a bit of data queued to build aggregates properly, so
907 * instruct the TCP stack to allow more than a single ms of data
908 * to be queued in the stack. The value is a bit-shift of 1
909 * second, so 7 is ~8ms of queued data. Only affects local TCP
910 * sockets.
911 * This is the default, anyhow - drivers may need to override it
912 * for local reasons (longer buffers, longer completion time, or
913 * similar).
914 */
915 local->hw.tx_sk_pacing_shift = 7;
916
917 /* set up some defaults */
918 local->hw.queues = 1;
919 local->hw.max_rates = 1;
920 local->hw.max_report_rates = 0;
921 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
922 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
923 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
924 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
925 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
926 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
927 IEEE80211_RADIOTAP_MCS_HAVE_GI |
928 IEEE80211_RADIOTAP_MCS_HAVE_BW;
929 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
930 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
931 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
932 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
933 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
934 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
935 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
936 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
937
938 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
939
940 wiphy->extended_capabilities = local->ext_capa;
941 wiphy->extended_capabilities_mask = local->ext_capa;
942 wiphy->extended_capabilities_len =
943 ARRAY_SIZE(local->ext_capa);
944
945 INIT_LIST_HEAD(&local->interfaces);
946 INIT_LIST_HEAD(&local->mon_list);
947
948 __hw_addr_init(&local->mc_list);
949
950 mutex_init(&local->iflist_mtx);
951 spin_lock_init(&local->filter_lock);
952 spin_lock_init(&local->rx_path_lock);
953 spin_lock_init(&local->queue_stop_reason_lock);
954
955 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
956 INIT_LIST_HEAD(&local->active_txqs[i]);
957 spin_lock_init(&local->active_txq_lock[i]);
958 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
959 local->aql_txq_limit_high[i] =
960 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
961 atomic_set(&local->aql_ac_pending_airtime[i], 0);
962 }
963
964 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
965 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
966 atomic_set(&local->aql_total_pending_airtime, 0);
967
968 spin_lock_init(&local->handle_wake_tx_queue_lock);
969
970 INIT_LIST_HEAD(&local->chanctx_list);
971
972 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
973
974 INIT_WORK(&local->restart_work, ieee80211_restart_work);
975
976 wiphy_work_init(&local->radar_detected_work,
977 ieee80211_dfs_radar_detected_work);
978
979 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
980
981 wiphy_work_init(&local->dynamic_ps_enable_work,
982 ieee80211_dynamic_ps_enable_work);
983 wiphy_work_init(&local->dynamic_ps_disable_work,
984 ieee80211_dynamic_ps_disable_work);
985 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
986
987 wiphy_work_init(&local->sched_scan_stopped_work,
988 ieee80211_sched_scan_stopped_work);
989
990 spin_lock_init(&local->ack_status_lock);
991 idr_init(&local->ack_status_frames);
992
993 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
994 skb_queue_head_init(&local->pending[i]);
995 atomic_set(&local->agg_queue_stop[i], 0);
996 }
997 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
998 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
999 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
1000
1001 skb_queue_head_init(&local->skb_queue);
1002 skb_queue_head_init(&local->skb_queue_unreliable);
1003
1004 ieee80211_alloc_led_names(local);
1005
1006 ieee80211_roc_setup(local);
1007
1008 local->hw.radiotap_timestamp.units_pos = -1;
1009 local->hw.radiotap_timestamp.accuracy = -1;
1010
1011 return &local->hw;
1012 err_free:
1013 wiphy_free(wiphy);
1014 return NULL;
1015 }
1016 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1017
1018 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1019 {
1020 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
1021 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1022 int r = 0, w = 0;
1023 u32 *suites;
1024 static const u32 cipher_suites[] = {
1025 /* keep WEP first, it may be removed below */
1026 WLAN_CIPHER_SUITE_WEP40,
1027 WLAN_CIPHER_SUITE_WEP104,
1028 WLAN_CIPHER_SUITE_TKIP,
1029 WLAN_CIPHER_SUITE_CCMP,
1030 WLAN_CIPHER_SUITE_CCMP_256,
1031 WLAN_CIPHER_SUITE_GCMP,
1032 WLAN_CIPHER_SUITE_GCMP_256,
1033
1034 /* keep last -- depends on hw flags! */
1035 WLAN_CIPHER_SUITE_AES_CMAC,
1036 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1037 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1038 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1039 };
1040
1041 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
1042 local->hw.wiphy->cipher_suites) {
1043 /* If the driver advertises, or doesn't support SW crypto,
1044 * we only need to remove WEP if necessary.
1045 */
1046 if (have_wep)
1047 return 0;
1048
1049 /* well if it has _no_ ciphers ... fine */
1050 if (!local->hw.wiphy->n_cipher_suites)
1051 return 0;
1052
1053 /* Driver provides cipher suites, but we need to exclude WEP */
1054 suites = kmemdup(local->hw.wiphy->cipher_suites,
1055 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
1056 GFP_KERNEL);
1057 if (!suites)
1058 return -ENOMEM;
1059
1060 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
1061 u32 suite = local->hw.wiphy->cipher_suites[r];
1062
1063 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
1064 suite == WLAN_CIPHER_SUITE_WEP104)
1065 continue;
1066 suites[w++] = suite;
1067 }
1068 } else {
1069 /* assign the (software supported and perhaps offloaded)
1070 * cipher suites
1071 */
1072 local->hw.wiphy->cipher_suites = cipher_suites;
1073 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1074
1075 if (!have_mfp)
1076 local->hw.wiphy->n_cipher_suites -= 4;
1077
1078 if (!have_wep) {
1079 local->hw.wiphy->cipher_suites += 2;
1080 local->hw.wiphy->n_cipher_suites -= 2;
1081 }
1082
1083 /* not dynamically allocated, so just return */
1084 return 0;
1085 }
1086
1087 local->hw.wiphy->cipher_suites = suites;
1088 local->hw.wiphy->n_cipher_suites = w;
1089 local->wiphy_ciphers_allocated = true;
1090
1091 return 0;
1092 }
1093
1094 static bool
1095 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
1096 {
1097 int i, j;
1098
1099 for (i = 0; i < n_comb; i++, c++) {
1100 /* DFS is not supported with multi-channel combinations yet */
1101 if (c->radar_detect_widths &&
1102 c->num_different_channels > 1)
1103 return false;
1104
1105 /* mac80211 doesn't support more than one IBSS interface */
1106 for (j = 0; j < c->n_limits; j++)
1107 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1108 c->limits[j].max > 1)
1109 return false;
1110 }
1111
1112 return true;
1113 }
1114
1115 int ieee80211_register_hw(struct ieee80211_hw *hw)
1116 {
1117 struct ieee80211_local *local = hw_to_local(hw);
1118 int result, i;
1119 enum nl80211_band band;
1120 int channels, max_bitrates;
1121 bool supp_ht, supp_vht, supp_he, supp_eht;
1122 struct cfg80211_chan_def dflt_chandef = {};
1123
1124 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1125 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1126 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1127 return -EINVAL;
1128
1129 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1130 (!local->ops->tdls_channel_switch ||
1131 !local->ops->tdls_cancel_channel_switch ||
1132 !local->ops->tdls_recv_channel_switch))
1133 return -EOPNOTSUPP;
1134
1135 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1136 !local->ops->set_frag_threshold))
1137 return -EINVAL;
1138
1139 if (WARN_ON(local->hw.wiphy->interface_modes &
1140 BIT(NL80211_IFTYPE_NAN) &&
1141 (!local->ops->start_nan || !local->ops->stop_nan)))
1142 return -EINVAL;
1143
1144 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1145 /*
1146 * For drivers capable of doing MLO, assume modern driver
1147 * or firmware facilities, so software doesn't have to do
1148 * as much, e.g. monitoring beacons would be hard if we
1149 * might not even know which link is active at which time.
1150 */
1151 if (WARN_ON(local->emulate_chanctx))
1152 return -EINVAL;
1153
1154 if (WARN_ON(!local->ops->link_info_changed))
1155 return -EINVAL;
1156
1157 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1158 return -EINVAL;
1159
1160 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1161 return -EINVAL;
1162
1163 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1164 return -EINVAL;
1165
1166 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1167 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1168 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1169 return -EINVAL;
1170
1171 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1172 return -EINVAL;
1173
1174 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1175 return -EINVAL;
1176
1177 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1178 return -EINVAL;
1179
1180 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1181 return -EINVAL;
1182
1183 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1184 return -EINVAL;
1185 }
1186
1187 #ifdef CONFIG_PM
1188 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1189 return -EINVAL;
1190 #endif
1191
1192 if (local->emulate_chanctx) {
1193 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1194 const struct ieee80211_iface_combination *comb;
1195
1196 comb = &local->hw.wiphy->iface_combinations[i];
1197
1198 if (comb->num_different_channels > 1)
1199 return -EINVAL;
1200 }
1201 }
1202
1203 if (hw->wiphy->n_radio) {
1204 for (i = 0; i < hw->wiphy->n_radio; i++) {
1205 const struct wiphy_radio *radio = &hw->wiphy->radio[i];
1206
1207 if (!ieee80211_ifcomb_check(radio->iface_combinations,
1208 radio->n_iface_combinations))
1209 return -EINVAL;
1210 }
1211 } else {
1212 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
1213 hw->wiphy->n_iface_combinations))
1214 return -EINVAL;
1215 }
1216
1217 /* Only HW csum features are currently compatible with mac80211 */
1218 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1219 return -EINVAL;
1220
1221 if (hw->max_report_rates == 0)
1222 hw->max_report_rates = hw->max_rates;
1223
1224 local->rx_chains = 1;
1225
1226 /*
1227 * generic code guarantees at least one band,
1228 * set this very early because much code assumes
1229 * that hw.conf.channel is assigned
1230 */
1231 channels = 0;
1232 max_bitrates = 0;
1233 supp_ht = false;
1234 supp_vht = false;
1235 supp_he = false;
1236 supp_eht = false;
1237 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1238 const struct ieee80211_sband_iftype_data *iftd;
1239 struct ieee80211_supported_band *sband;
1240
1241 sband = local->hw.wiphy->bands[band];
1242 if (!sband)
1243 continue;
1244
1245 if (!dflt_chandef.chan) {
1246 /*
1247 * Assign the first enabled channel to dflt_chandef
1248 * from the list of channels
1249 */
1250 for (i = 0; i < sband->n_channels; i++)
1251 if (!(sband->channels[i].flags &
1252 IEEE80211_CHAN_DISABLED))
1253 break;
1254 /* if none found then use the first anyway */
1255 if (i == sband->n_channels)
1256 i = 0;
1257 cfg80211_chandef_create(&dflt_chandef,
1258 &sband->channels[i],
1259 NL80211_CHAN_NO_HT);
1260 /* init channel we're on */
1261 local->monitor_chanreq.oper = dflt_chandef;
1262 if (local->emulate_chanctx) {
1263 local->dflt_chandef = dflt_chandef;
1264 local->hw.conf.chandef = dflt_chandef;
1265 }
1266 }
1267
1268 channels += sband->n_channels;
1269
1270 /*
1271 * Due to the way the aggregation code handles this and it
1272 * being an HT capability, we can't really support delayed
1273 * BA in MLO (yet).
1274 */
1275 if (WARN_ON(sband->ht_cap.ht_supported &&
1276 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1277 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1278 return -EINVAL;
1279
1280 if (max_bitrates < sband->n_bitrates)
1281 max_bitrates = sband->n_bitrates;
1282 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1283 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1284
1285 for_each_sband_iftype_data(sband, i, iftd) {
1286 u8 he_40_mhz_cap;
1287
1288 supp_he = supp_he || iftd->he_cap.has_he;
1289 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1290
1291 if (band == NL80211_BAND_2GHZ)
1292 he_40_mhz_cap =
1293 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1294 else
1295 he_40_mhz_cap =
1296 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1297
1298 /* currently no support for HE client where HT has 40 MHz but not HT */
1299 if (iftd->he_cap.has_he &&
1300 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1301 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1302 sband->ht_cap.ht_supported &&
1303 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1304 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1305 return -EINVAL;
1306 }
1307
1308 /* HT, VHT, HE require QoS, thus >= 4 queues */
1309 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1310 (supp_ht || supp_vht || supp_he)))
1311 return -EINVAL;
1312
1313 /* EHT requires HE support */
1314 if (WARN_ON(supp_eht && !supp_he))
1315 return -EINVAL;
1316
1317 if (!sband->ht_cap.ht_supported)
1318 continue;
1319
1320 /* TODO: consider VHT for RX chains, hopefully it's the same */
1321 local->rx_chains =
1322 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1323 local->rx_chains);
1324
1325 /* no need to mask, SM_PS_DISABLED has all bits set */
1326 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1327 IEEE80211_HT_CAP_SM_PS_SHIFT;
1328 }
1329
1330 /* if low-level driver supports AP, we also support VLAN.
1331 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1332 * based on their support to transmit SW encrypted packets.
1333 */
1334 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1335 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1336 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1337 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1338 }
1339
1340 /* mac80211 always supports monitor */
1341 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1342 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1343
1344
1345 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1346 sizeof(void *) * channels, GFP_KERNEL);
1347 if (!local->int_scan_req)
1348 return -ENOMEM;
1349
1350 eth_broadcast_addr(local->int_scan_req->bssid);
1351
1352 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1353 if (!local->hw.wiphy->bands[band])
1354 continue;
1355 local->int_scan_req->rates[band] = (u32) -1;
1356 }
1357
1358 #ifndef CONFIG_MAC80211_MESH
1359 /* mesh depends on Kconfig, but drivers should set it if they want */
1360 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1361 #endif
1362
1363 /* if the underlying driver supports mesh, mac80211 will (at least)
1364 * provide routing of mesh authentication frames to userspace */
1365 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1366 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1367
1368 /* mac80211 supports control port protocol changing */
1369 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1370
1371 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1372 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1373 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1374 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1375 if (hw->max_signal <= 0) {
1376 result = -EINVAL;
1377 goto fail_workqueue;
1378 }
1379 }
1380
1381 /* Mac80211 and therefore all drivers using SW crypto only
1382 * are able to handle PTK rekeys and Extended Key ID.
1383 */
1384 if (!local->ops->set_key) {
1385 wiphy_ext_feature_set(local->hw.wiphy,
1386 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1387 wiphy_ext_feature_set(local->hw.wiphy,
1388 NL80211_EXT_FEATURE_EXT_KEY_ID);
1389 }
1390
1391 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1392 wiphy_ext_feature_set(local->hw.wiphy,
1393 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1394
1395 /*
1396 * Calculate scan IE length -- we need this to alloc
1397 * memory and to subtract from the driver limit. It
1398 * includes the DS Params, (extended) supported rates, and HT
1399 * information -- SSID is the driver's responsibility.
1400 */
1401 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1402 3 /* DS Params */;
1403 if (supp_ht)
1404 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1405
1406 if (supp_vht)
1407 local->scan_ies_len +=
1408 2 + sizeof(struct ieee80211_vht_cap);
1409
1410 /*
1411 * HE cap element is variable in size - set len to allow max size */
1412 if (supp_he) {
1413 local->scan_ies_len +=
1414 3 + sizeof(struct ieee80211_he_cap_elem) +
1415 sizeof(struct ieee80211_he_mcs_nss_supp) +
1416 IEEE80211_HE_PPE_THRES_MAX_LEN;
1417
1418 if (supp_eht)
1419 local->scan_ies_len +=
1420 3 + sizeof(struct ieee80211_eht_cap_elem) +
1421 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1422 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1423 }
1424
1425 if (!local->ops->hw_scan) {
1426 /* For hw_scan, driver needs to set these up. */
1427 local->hw.wiphy->max_scan_ssids = 4;
1428 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1429 }
1430
1431 /*
1432 * If the driver supports any scan IEs, then assume the
1433 * limit includes the IEs mac80211 will add, otherwise
1434 * leave it at zero and let the driver sort it out; we
1435 * still pass our IEs to the driver but userspace will
1436 * not be allowed to in that case.
1437 */
1438 if (local->hw.wiphy->max_scan_ie_len)
1439 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1440
1441 result = ieee80211_init_cipher_suites(local);
1442 if (result < 0)
1443 goto fail_workqueue;
1444
1445 if (!local->ops->remain_on_channel)
1446 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1447
1448 /* mac80211 based drivers don't support internal TDLS setup */
1449 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1450 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1451
1452 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1453 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1454 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1455
1456 /* mac80211 supports multi BSSID, if the driver supports it */
1457 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1458 local->hw.wiphy->support_mbssid = true;
1459 if (ieee80211_hw_check(&local->hw,
1460 SUPPORTS_ONLY_HE_MULTI_BSSID))
1461 local->hw.wiphy->support_only_he_mbssid = true;
1462 else
1463 local->ext_capa[2] |=
1464 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1465 }
1466
1467 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1468
1469 /*
1470 * We use the number of queues for feature tests (QoS, HT) internally
1471 * so restrict them appropriately.
1472 */
1473 if (hw->queues > IEEE80211_MAX_QUEUES)
1474 hw->queues = IEEE80211_MAX_QUEUES;
1475
1476 local->workqueue =
1477 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1478 if (!local->workqueue) {
1479 result = -ENOMEM;
1480 goto fail_workqueue;
1481 }
1482
1483 /*
1484 * The hardware needs headroom for sending the frame,
1485 * and we need some headroom for passing the frame to monitor
1486 * interfaces, but never both at the same time.
1487 */
1488 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1489 IEEE80211_TX_STATUS_HEADROOM);
1490
1491 /*
1492 * if the driver doesn't specify a max listen interval we
1493 * use 5 which should be a safe default
1494 */
1495 if (local->hw.max_listen_interval == 0)
1496 local->hw.max_listen_interval = 5;
1497
1498 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1499
1500 local->dynamic_ps_forced_timeout = -1;
1501
1502 if (!local->hw.max_nan_de_entries)
1503 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1504
1505 if (!local->hw.weight_multiplier)
1506 local->hw.weight_multiplier = 1;
1507
1508 ieee80211_wep_init(local);
1509
1510 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1511
1512 ieee80211_led_init(local);
1513
1514 result = ieee80211_txq_setup_flows(local);
1515 if (result)
1516 goto fail_flows;
1517
1518 rtnl_lock();
1519 result = ieee80211_init_rate_ctrl_alg(local,
1520 hw->rate_control_algorithm);
1521 rtnl_unlock();
1522 if (result < 0) {
1523 wiphy_debug(local->hw.wiphy,
1524 "Failed to initialize rate control algorithm\n");
1525 goto fail_rate;
1526 }
1527
1528 if (local->rate_ctrl) {
1529 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1530 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1531 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1532 }
1533
1534 /*
1535 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1536 * or have it when we don't, copy the sband structure and set/clear it.
1537 * This is necessary because rate scaling algorithms could be switched
1538 * and have different support values.
1539 * Print a message so that in the common case the reallocation can be
1540 * avoided.
1541 */
1542 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1543 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1544 struct ieee80211_supported_band *sband;
1545 bool local_cap, ie_cap;
1546
1547 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1548
1549 sband = local->hw.wiphy->bands[band];
1550 if (!sband || !sband->vht_cap.vht_supported)
1551 continue;
1552
1553 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1554 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1555
1556 if (local_cap == ie_cap)
1557 continue;
1558
1559 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1560 if (!sband) {
1561 result = -ENOMEM;
1562 goto fail_rate;
1563 }
1564
1565 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1566 band);
1567
1568 sband->vht_cap.vht_mcs.tx_highest ^=
1569 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1570
1571 local->hw.wiphy->bands[band] = sband;
1572 local->sband_allocated |= BIT(band);
1573 }
1574
1575 result = wiphy_register(local->hw.wiphy);
1576 if (result < 0)
1577 goto fail_wiphy_register;
1578
1579 debugfs_hw_add(local);
1580 rate_control_add_debugfs(local);
1581
1582 ieee80211_check_wbrf_support(local);
1583
1584 rtnl_lock();
1585 wiphy_lock(hw->wiphy);
1586
1587 /* add one default STA interface if supported */
1588 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1589 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1590 struct vif_params params = {0};
1591
1592 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1593 NL80211_IFTYPE_STATION, ¶ms);
1594 if (result)
1595 wiphy_warn(local->hw.wiphy,
1596 "Failed to add default virtual iface\n");
1597 }
1598
1599 wiphy_unlock(hw->wiphy);
1600 rtnl_unlock();
1601
1602 #ifdef CONFIG_INET
1603 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1604 result = register_inetaddr_notifier(&local->ifa_notifier);
1605 if (result)
1606 goto fail_ifa;
1607 #endif
1608
1609 #if IS_ENABLED(CONFIG_IPV6)
1610 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1611 result = register_inet6addr_notifier(&local->ifa6_notifier);
1612 if (result)
1613 goto fail_ifa6;
1614 #endif
1615
1616 return 0;
1617
1618 #if IS_ENABLED(CONFIG_IPV6)
1619 fail_ifa6:
1620 #ifdef CONFIG_INET
1621 unregister_inetaddr_notifier(&local->ifa_notifier);
1622 #endif
1623 #endif
1624 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1625 fail_ifa:
1626 #endif
1627 wiphy_unregister(local->hw.wiphy);
1628 fail_wiphy_register:
1629 rtnl_lock();
1630 rate_control_deinitialize(local);
1631 ieee80211_remove_interfaces(local);
1632 rtnl_unlock();
1633 fail_rate:
1634 ieee80211_txq_teardown_flows(local);
1635 fail_flows:
1636 ieee80211_led_exit(local);
1637 destroy_workqueue(local->workqueue);
1638 fail_workqueue:
1639 if (local->wiphy_ciphers_allocated) {
1640 kfree(local->hw.wiphy->cipher_suites);
1641 local->wiphy_ciphers_allocated = false;
1642 }
1643 kfree(local->int_scan_req);
1644 return result;
1645 }
1646 EXPORT_SYMBOL(ieee80211_register_hw);
1647
1648 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1649 {
1650 struct ieee80211_local *local = hw_to_local(hw);
1651
1652 tasklet_kill(&local->tx_pending_tasklet);
1653 tasklet_kill(&local->tasklet);
1654
1655 #ifdef CONFIG_INET
1656 unregister_inetaddr_notifier(&local->ifa_notifier);
1657 #endif
1658 #if IS_ENABLED(CONFIG_IPV6)
1659 unregister_inet6addr_notifier(&local->ifa6_notifier);
1660 #endif
1661
1662 rtnl_lock();
1663
1664 /*
1665 * At this point, interface list manipulations are fine
1666 * because the driver cannot be handing us frames any
1667 * more and the tasklet is killed.
1668 */
1669 ieee80211_remove_interfaces(local);
1670
1671 ieee80211_txq_teardown_flows(local);
1672
1673 wiphy_lock(local->hw.wiphy);
1674 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1675 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1676 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1677 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1678 wiphy_unlock(local->hw.wiphy);
1679 rtnl_unlock();
1680
1681 cancel_work_sync(&local->restart_work);
1682
1683 ieee80211_clear_tx_pending(local);
1684 rate_control_deinitialize(local);
1685
1686 if (skb_queue_len(&local->skb_queue) ||
1687 skb_queue_len(&local->skb_queue_unreliable))
1688 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1689 skb_queue_purge(&local->skb_queue);
1690 skb_queue_purge(&local->skb_queue_unreliable);
1691
1692 wiphy_unregister(local->hw.wiphy);
1693 destroy_workqueue(local->workqueue);
1694 ieee80211_led_exit(local);
1695 kfree(local->int_scan_req);
1696 }
1697 EXPORT_SYMBOL(ieee80211_unregister_hw);
1698
1699 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1700 {
1701 WARN_ONCE(1, "Have pending ack frames!\n");
1702 kfree_skb(p);
1703 return 0;
1704 }
1705
1706 void ieee80211_free_hw(struct ieee80211_hw *hw)
1707 {
1708 struct ieee80211_local *local = hw_to_local(hw);
1709 enum nl80211_band band;
1710
1711 mutex_destroy(&local->iflist_mtx);
1712
1713 if (local->wiphy_ciphers_allocated) {
1714 kfree(local->hw.wiphy->cipher_suites);
1715 local->wiphy_ciphers_allocated = false;
1716 }
1717
1718 idr_for_each(&local->ack_status_frames,
1719 ieee80211_free_ack_frame, NULL);
1720 idr_destroy(&local->ack_status_frames);
1721
1722 sta_info_stop(local);
1723
1724 ieee80211_free_led_names(local);
1725
1726 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1727 if (!(local->sband_allocated & BIT(band)))
1728 continue;
1729 kfree(local->hw.wiphy->bands[band]);
1730 }
1731
1732 wiphy_free(local->hw.wiphy);
1733 }
1734 EXPORT_SYMBOL(ieee80211_free_hw);
1735
1736 static const char * const drop_reasons_monitor[] = {
1737 #define V(x) #x,
1738 [0] = "RX_DROP_MONITOR",
1739 MAC80211_DROP_REASONS_MONITOR(V)
1740 };
1741
1742 static struct drop_reason_list drop_reason_list_monitor = {
1743 .reasons = drop_reasons_monitor,
1744 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1745 };
1746
1747 static const char * const drop_reasons_unusable[] = {
1748 [0] = "RX_DROP_UNUSABLE",
1749 MAC80211_DROP_REASONS_UNUSABLE(V)
1750 #undef V
1751 };
1752
1753 static struct drop_reason_list drop_reason_list_unusable = {
1754 .reasons = drop_reasons_unusable,
1755 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1756 };
1757
1758 static int __init ieee80211_init(void)
1759 {
1760 struct sk_buff *skb;
1761 int ret;
1762
1763 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1764 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1765 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1766
1767 ret = rc80211_minstrel_init();
1768 if (ret)
1769 return ret;
1770
1771 ret = ieee80211_iface_init();
1772 if (ret)
1773 goto err_netdev;
1774
1775 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1776 &drop_reason_list_monitor);
1777 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1778 &drop_reason_list_unusable);
1779
1780 return 0;
1781 err_netdev:
1782 rc80211_minstrel_exit();
1783
1784 return ret;
1785 }
1786
1787 static void __exit ieee80211_exit(void)
1788 {
1789 rc80211_minstrel_exit();
1790
1791 ieee80211s_stop();
1792
1793 ieee80211_iface_exit();
1794
1795 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1796 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1797
1798 rcu_barrier();
1799 }
1800
1801
1802 subsys_initcall(ieee80211_init);
1803 module_exit(ieee80211_exit);
1804
1805 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1806 MODULE_LICENSE("GPL");
1807
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