projects / linux-block.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
nl80211/cfg80211: add radar detection command/event
[linux-block.git] / net / mac80211 / main.c
... / ...
CommitLineData
1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <net/mac80211.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/netdevice.h>
15#include <linux/types.h>
16#include <linux/slab.h>
17#include <linux/skbuff.h>
18#include <linux/etherdevice.h>
19#include <linux/if_arp.h>
20#include <linux/rtnetlink.h>
21#include <linux/bitmap.h>
22#include <linux/pm_qos.h>
23#include <linux/inetdevice.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/addrconf.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wep.h"
33#include "led.h"
34#include "cfg.h"
35#include "debugfs.h"
36
37void 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_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
45
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
48
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
52
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
55
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
58
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
61
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
64
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
67
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
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
87static void ieee80211_reconfig_filter(struct work_struct *work)
88{
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
91
92 ieee80211_configure_filter(local);
93}
94
95static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
96{
97 struct ieee80211_sub_if_data *sdata;
98 struct ieee80211_channel *chan;
99 u32 changed = 0;
100 int power;
101 enum nl80211_channel_type channel_type;
102 u32 offchannel_flag;
103 bool scanning = false;
104
105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
106 if (local->scan_channel) {
107 chan = local->scan_channel;
108 /* If scanning on oper channel, use whatever channel-type
109 * is currently in use.
110 */
111 if (chan == local->_oper_channel)
112 channel_type = local->_oper_channel_type;
113 else
114 channel_type = NL80211_CHAN_NO_HT;
115 } else if (local->tmp_channel) {
116 chan = local->tmp_channel;
117 channel_type = NL80211_CHAN_NO_HT;
118 } else {
119 chan = local->_oper_channel;
120 channel_type = local->_oper_channel_type;
121 }
122
123 if (chan != local->_oper_channel ||
124 channel_type != local->_oper_channel_type)
125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
126 else
127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
128
129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
130
131 if (offchannel_flag || chan != local->hw.conf.channel ||
132 channel_type != local->hw.conf.channel_type) {
133 local->hw.conf.channel = chan;
134 local->hw.conf.channel_type = channel_type;
135 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
136 }
137
138 if (!conf_is_ht(&local->hw.conf)) {
139 /*
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
143 */
144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
145 } else if (local->hw.conf.smps_mode != local->smps_mode) {
146 local->hw.conf.smps_mode = local->smps_mode;
147 changed |= IEEE80211_CONF_CHANGE_SMPS;
148 }
149
150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
152 test_bit(SCAN_HW_SCANNING, &local->scanning);
153 power = chan->max_power;
154
155 rcu_read_lock();
156 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
157 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
158 continue;
159 power = min(power, sdata->vif.bss_conf.txpower);
160 }
161 rcu_read_unlock();
162
163 if (local->hw.conf.power_level != power) {
164 changed |= IEEE80211_CONF_CHANGE_POWER;
165 local->hw.conf.power_level = power;
166 }
167
168 return changed;
169}
170
171int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
172{
173 int ret = 0;
174
175 might_sleep();
176
177 if (!local->use_chanctx)
178 changed |= ieee80211_hw_conf_chan(local);
179 else
180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
181 IEEE80211_CONF_CHANGE_POWER);
182
183 if (changed && local->open_count) {
184 ret = drv_config(local, changed);
185 /*
186 * Goal:
187 * HW reconfiguration should never fail, the driver has told
188 * us what it can support so it should live up to that promise.
189 *
190 * Current status:
191 * rfkill is not integrated with mac80211 and a
192 * configuration command can thus fail if hardware rfkill
193 * is enabled
194 *
195 * FIXME: integrate rfkill with mac80211 and then add this
196 * WARN_ON() back
197 *
198 */
199 /* WARN_ON(ret); */
200 }
201
202 return ret;
203}
204
205void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
206 u32 changed)
207{
208 struct ieee80211_local *local = sdata->local;
209
210 if (!changed)
211 return;
212
213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
214}
215
216u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
217{
218 sdata->vif.bss_conf.use_cts_prot = false;
219 sdata->vif.bss_conf.use_short_preamble = false;
220 sdata->vif.bss_conf.use_short_slot = false;
221 return BSS_CHANGED_ERP_CTS_PROT |
222 BSS_CHANGED_ERP_PREAMBLE |
223 BSS_CHANGED_ERP_SLOT;
224}
225
226static void ieee80211_tasklet_handler(unsigned long data)
227{
228 struct ieee80211_local *local = (struct ieee80211_local *) data;
229 struct sta_info *sta, *tmp;
230 struct skb_eosp_msg_data *eosp_data;
231 struct sk_buff *skb;
232
233 while ((skb = skb_dequeue(&local->skb_queue)) ||
234 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
235 switch (skb->pkt_type) {
236 case IEEE80211_RX_MSG:
237 /* Clear skb->pkt_type in order to not confuse kernel
238 * netstack. */
239 skb->pkt_type = 0;
240 ieee80211_rx(&local->hw, skb);
241 break;
242 case IEEE80211_TX_STATUS_MSG:
243 skb->pkt_type = 0;
244 ieee80211_tx_status(&local->hw, skb);
245 break;
246 case IEEE80211_EOSP_MSG:
247 eosp_data = (void *)skb->cb;
248 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
249 /* skip wrong virtual interface */
250 if (memcmp(eosp_data->iface,
251 sta->sdata->vif.addr, ETH_ALEN))
252 continue;
253 clear_sta_flag(sta, WLAN_STA_SP);
254 break;
255 }
256 dev_kfree_skb(skb);
257 break;
258 default:
259 WARN(1, "mac80211: Packet is of unknown type %d\n",
260 skb->pkt_type);
261 dev_kfree_skb(skb);
262 break;
263 }
264 }
265}
266
267static void ieee80211_restart_work(struct work_struct *work)
268{
269 struct ieee80211_local *local =
270 container_of(work, struct ieee80211_local, restart_work);
271
272 /* wait for scan work complete */
273 flush_workqueue(local->workqueue);
274
275 mutex_lock(&local->mtx);
276 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
277 rcu_dereference_protected(local->sched_scan_sdata,
278 lockdep_is_held(&local->mtx)),
279 "%s called with hardware scan in progress\n", __func__);
280 mutex_unlock(&local->mtx);
281
282 rtnl_lock();
283 ieee80211_scan_cancel(local);
284 ieee80211_reconfig(local);
285 rtnl_unlock();
286}
287
288void ieee80211_restart_hw(struct ieee80211_hw *hw)
289{
290 struct ieee80211_local *local = hw_to_local(hw);
291
292 trace_api_restart_hw(local);
293
294 wiphy_info(hw->wiphy,
295 "Hardware restart was requested\n");
296
297 /* use this reason, ieee80211_reconfig will unblock it */
298 ieee80211_stop_queues_by_reason(hw,
299 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
300
301 /*
302 * Stop all Rx during the reconfig. We don't want state changes
303 * or driver callbacks while this is in progress.
304 */
305 local->in_reconfig = true;
306 barrier();
307
308 schedule_work(&local->restart_work);
309}
310EXPORT_SYMBOL(ieee80211_restart_hw);
311
312#ifdef CONFIG_INET
313static int ieee80211_ifa_changed(struct notifier_block *nb,
314 unsigned long data, void *arg)
315{
316 struct in_ifaddr *ifa = arg;
317 struct ieee80211_local *local =
318 container_of(nb, struct ieee80211_local,
319 ifa_notifier);
320 struct net_device *ndev = ifa->ifa_dev->dev;
321 struct wireless_dev *wdev = ndev->ieee80211_ptr;
322 struct in_device *idev;
323 struct ieee80211_sub_if_data *sdata;
324 struct ieee80211_bss_conf *bss_conf;
325 struct ieee80211_if_managed *ifmgd;
326 int c = 0;
327
328 /* Make sure it's our interface that got changed */
329 if (!wdev)
330 return NOTIFY_DONE;
331
332 if (wdev->wiphy != local->hw.wiphy)
333 return NOTIFY_DONE;
334
335 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
336 bss_conf = &sdata->vif.bss_conf;
337
338 /* ARP filtering is only supported in managed mode */
339 if (sdata->vif.type != NL80211_IFTYPE_STATION)
340 return NOTIFY_DONE;
341
342 idev = __in_dev_get_rtnl(sdata->dev);
343 if (!idev)
344 return NOTIFY_DONE;
345
346 ifmgd = &sdata->u.mgd;
347 mutex_lock(&ifmgd->mtx);
348
349 /* Copy the addresses to the bss_conf list */
350 ifa = idev->ifa_list;
351 while (ifa) {
352 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
353 bss_conf->arp_addr_list[c] = ifa->ifa_address;
354 ifa = ifa->ifa_next;
355 c++;
356 }
357
358 bss_conf->arp_addr_cnt = c;
359
360 /* Configure driver only if associated (which also implies it is up) */
361 if (ifmgd->associated)
362 ieee80211_bss_info_change_notify(sdata,
363 BSS_CHANGED_ARP_FILTER);
364
365 mutex_unlock(&ifmgd->mtx);
366
367 return NOTIFY_DONE;
368}
369#endif
370
371#if IS_ENABLED(CONFIG_IPV6)
372static int ieee80211_ifa6_changed(struct notifier_block *nb,
373 unsigned long data, void *arg)
374{
375 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
376 struct inet6_dev *idev = ifa->idev;
377 struct net_device *ndev = ifa->idev->dev;
378 struct ieee80211_local *local =
379 container_of(nb, struct ieee80211_local, ifa6_notifier);
380 struct wireless_dev *wdev = ndev->ieee80211_ptr;
381 struct ieee80211_sub_if_data *sdata;
382
383 /* Make sure it's our interface that got changed */
384 if (!wdev || wdev->wiphy != local->hw.wiphy)
385 return NOTIFY_DONE;
386
387 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
388
389 /*
390 * For now only support station mode. This is mostly because
391 * doing AP would have to handle AP_VLAN in some way ...
392 */
393 if (sdata->vif.type != NL80211_IFTYPE_STATION)
394 return NOTIFY_DONE;
395
396 drv_ipv6_addr_change(local, sdata, idev);
397
398 return NOTIFY_DONE;
399}
400#endif
401
402static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
403{
404 struct ieee80211_local *local =
405 container_of(napi, struct ieee80211_local, napi);
406
407 return local->ops->napi_poll(&local->hw, budget);
408}
409
410void ieee80211_napi_schedule(struct ieee80211_hw *hw)
411{
412 struct ieee80211_local *local = hw_to_local(hw);
413
414 napi_schedule(&local->napi);
415}
416EXPORT_SYMBOL(ieee80211_napi_schedule);
417
418void ieee80211_napi_complete(struct ieee80211_hw *hw)
419{
420 struct ieee80211_local *local = hw_to_local(hw);
421
422 napi_complete(&local->napi);
423}
424EXPORT_SYMBOL(ieee80211_napi_complete);
425
426/* There isn't a lot of sense in it, but you can transmit anything you like */
427static const struct ieee80211_txrx_stypes
428ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
429 [NL80211_IFTYPE_ADHOC] = {
430 .tx = 0xffff,
431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
434 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
435 },
436 [NL80211_IFTYPE_STATION] = {
437 .tx = 0xffff,
438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
440 },
441 [NL80211_IFTYPE_AP] = {
442 .tx = 0xffff,
443 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
444 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
446 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
447 BIT(IEEE80211_STYPE_AUTH >> 4) |
448 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
449 BIT(IEEE80211_STYPE_ACTION >> 4),
450 },
451 [NL80211_IFTYPE_AP_VLAN] = {
452 /* copy AP */
453 .tx = 0xffff,
454 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
455 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
457 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
458 BIT(IEEE80211_STYPE_AUTH >> 4) |
459 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
460 BIT(IEEE80211_STYPE_ACTION >> 4),
461 },
462 [NL80211_IFTYPE_P2P_CLIENT] = {
463 .tx = 0xffff,
464 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
465 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
466 },
467 [NL80211_IFTYPE_P2P_GO] = {
468 .tx = 0xffff,
469 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
470 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
472 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
473 BIT(IEEE80211_STYPE_AUTH >> 4) |
474 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
475 BIT(IEEE80211_STYPE_ACTION >> 4),
476 },
477 [NL80211_IFTYPE_MESH_POINT] = {
478 .tx = 0xffff,
479 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
480 BIT(IEEE80211_STYPE_AUTH >> 4) |
481 BIT(IEEE80211_STYPE_DEAUTH >> 4),
482 },
483 [NL80211_IFTYPE_P2P_DEVICE] = {
484 .tx = 0xffff,
485 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
486 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
487 },
488};
489
490static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
491 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
492 IEEE80211_HT_AMPDU_PARM_DENSITY,
493
494 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
495 IEEE80211_HT_CAP_MAX_AMSDU |
496 IEEE80211_HT_CAP_SGI_20 |
497 IEEE80211_HT_CAP_SGI_40),
498 .mcs = {
499 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
500 0xff, 0xff, 0xff, 0xff, 0xff, },
501 },
502};
503
504struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
505 const struct ieee80211_ops *ops)
506{
507 struct ieee80211_local *local;
508 int priv_size, i;
509 struct wiphy *wiphy;
510 bool use_chanctx;
511
512 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
513 !ops->add_interface || !ops->remove_interface ||
514 !ops->configure_filter))
515 return NULL;
516
517 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
518 return NULL;
519
520 /* check all or no channel context operations exist */
521 i = !!ops->add_chanctx + !!ops->remove_chanctx +
522 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
523 !!ops->unassign_vif_chanctx;
524 if (WARN_ON(i != 0 && i != 5))
525 return NULL;
526 use_chanctx = i == 5;
527
528 /* Ensure 32-byte alignment of our private data and hw private data.
529 * We use the wiphy priv data for both our ieee80211_local and for
530 * the driver's private data
531 *
532 * In memory it'll be like this:
533 *
534 * +-------------------------+
535 * | struct wiphy |
536 * +-------------------------+
537 * | struct ieee80211_local |
538 * +-------------------------+
539 * | driver's private data |
540 * +-------------------------+
541 *
542 */
543 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
544
545 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
546
547 if (!wiphy)
548 return NULL;
549
550 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
551
552 wiphy->privid = mac80211_wiphy_privid;
553
554 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
555 WIPHY_FLAG_4ADDR_AP |
556 WIPHY_FLAG_4ADDR_STATION |
557 WIPHY_FLAG_REPORTS_OBSS |
558 WIPHY_FLAG_OFFCHAN_TX;
559
560 if (ops->remain_on_channel)
561 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
562
563 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
564 NL80211_FEATURE_SAE |
565 NL80211_FEATURE_HT_IBSS |
566 NL80211_FEATURE_VIF_TXPOWER |
567 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
568
569 if (!ops->hw_scan)
570 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
571 NL80211_FEATURE_AP_SCAN;
572
573
574 if (!ops->set_key)
575 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
576
577 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
578
579 local = wiphy_priv(wiphy);
580
581 local->hw.wiphy = wiphy;
582
583 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
584
585 local->ops = ops;
586 local->use_chanctx = use_chanctx;
587
588 /* set up some defaults */
589 local->hw.queues = 1;
590 local->hw.max_rates = 1;
591 local->hw.max_report_rates = 0;
592 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
593 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
594 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
595 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
596 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
597 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
598 IEEE80211_RADIOTAP_MCS_HAVE_GI |
599 IEEE80211_RADIOTAP_MCS_HAVE_BW;
600 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
601 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
602 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
603 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
604
605 INIT_LIST_HEAD(&local->interfaces);
606
607 __hw_addr_init(&local->mc_list);
608
609 mutex_init(&local->iflist_mtx);
610 mutex_init(&local->mtx);
611
612 mutex_init(&local->key_mtx);
613 spin_lock_init(&local->filter_lock);
614 spin_lock_init(&local->rx_path_lock);
615 spin_lock_init(&local->queue_stop_reason_lock);
616
617 INIT_LIST_HEAD(&local->chanctx_list);
618 mutex_init(&local->chanctx_mtx);
619
620 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
621
622 INIT_WORK(&local->restart_work, ieee80211_restart_work);
623
624 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
625 local->smps_mode = IEEE80211_SMPS_OFF;
626
627 INIT_WORK(&local->dynamic_ps_enable_work,
628 ieee80211_dynamic_ps_enable_work);
629 INIT_WORK(&local->dynamic_ps_disable_work,
630 ieee80211_dynamic_ps_disable_work);
631 setup_timer(&local->dynamic_ps_timer,
632 ieee80211_dynamic_ps_timer, (unsigned long) local);
633
634 INIT_WORK(&local->sched_scan_stopped_work,
635 ieee80211_sched_scan_stopped_work);
636
637 spin_lock_init(&local->ack_status_lock);
638 idr_init(&local->ack_status_frames);
639 /* preallocate at least one entry */
640 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
641
642 sta_info_init(local);
643
644 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
645 skb_queue_head_init(&local->pending[i]);
646 atomic_set(&local->agg_queue_stop[i], 0);
647 }
648 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
649 (unsigned long)local);
650
651 tasklet_init(&local->tasklet,
652 ieee80211_tasklet_handler,
653 (unsigned long) local);
654
655 skb_queue_head_init(&local->skb_queue);
656 skb_queue_head_init(&local->skb_queue_unreliable);
657
658 /* init dummy netdev for use w/ NAPI */
659 init_dummy_netdev(&local->napi_dev);
660
661 ieee80211_led_names(local);
662
663 ieee80211_roc_setup(local);
664
665 return &local->hw;
666}
667EXPORT_SYMBOL(ieee80211_alloc_hw);
668
669int ieee80211_register_hw(struct ieee80211_hw *hw)
670{
671 struct ieee80211_local *local = hw_to_local(hw);
672 int result, i;
673 enum ieee80211_band band;
674 int channels, max_bitrates;
675 bool supp_ht, supp_vht;
676 netdev_features_t feature_whitelist;
677 static const u32 cipher_suites[] = {
678 /* keep WEP first, it may be removed below */
679 WLAN_CIPHER_SUITE_WEP40,
680 WLAN_CIPHER_SUITE_WEP104,
681 WLAN_CIPHER_SUITE_TKIP,
682 WLAN_CIPHER_SUITE_CCMP,
683
684 /* keep last -- depends on hw flags! */
685 WLAN_CIPHER_SUITE_AES_CMAC
686 };
687
688 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
689 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
690 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
691 return -EINVAL;
692
693#ifdef CONFIG_PM
694 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
695 (!local->ops->suspend || !local->ops->resume))
696 return -EINVAL;
697#endif
698
699 if (!local->use_chanctx) {
700 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
701 const struct ieee80211_iface_combination *comb;
702
703 comb = &local->hw.wiphy->iface_combinations[i];
704
705 if (comb->num_different_channels > 1)
706 return -EINVAL;
707 }
708 } else {
709 /*
710 * WDS is currently prohibited when channel contexts are used
711 * because there's no clear definition of which channel WDS
712 * type interfaces use
713 */
714 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
715 return -EINVAL;
716 }
717
718 /* Only HW csum features are currently compatible with mac80211 */
719 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
720 NETIF_F_HW_CSUM;
721 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
722 return -EINVAL;
723
724 if (hw->max_report_rates == 0)
725 hw->max_report_rates = hw->max_rates;
726
727 local->rx_chains = 1;
728
729 /*
730 * generic code guarantees at least one band,
731 * set this very early because much code assumes
732 * that hw.conf.channel is assigned
733 */
734 channels = 0;
735 max_bitrates = 0;
736 supp_ht = false;
737 supp_vht = false;
738 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
739 struct ieee80211_supported_band *sband;
740
741 sband = local->hw.wiphy->bands[band];
742 if (!sband)
743 continue;
744 if (!local->use_chanctx && !local->_oper_channel) {
745 /* init channel we're on */
746 local->hw.conf.channel =
747 local->_oper_channel = &sband->channels[0];
748 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
749 }
750 cfg80211_chandef_create(&local->monitor_chandef,
751 &sband->channels[0],
752 NL80211_CHAN_NO_HT);
753 channels += sband->n_channels;
754
755 if (max_bitrates < sband->n_bitrates)
756 max_bitrates = sband->n_bitrates;
757 supp_ht = supp_ht || sband->ht_cap.ht_supported;
758 supp_vht = supp_vht || sband->vht_cap.vht_supported;
759
760 if (sband->ht_cap.ht_supported)
761 local->rx_chains =
762 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
763 local->rx_chains);
764
765 /* TODO: consider VHT for RX chains, hopefully it's the same */
766 }
767
768 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
769 sizeof(void *) * channels, GFP_KERNEL);
770 if (!local->int_scan_req)
771 return -ENOMEM;
772
773 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
774 if (!local->hw.wiphy->bands[band])
775 continue;
776 local->int_scan_req->rates[band] = (u32) -1;
777 }
778
779 /* if low-level driver supports AP, we also support VLAN */
780 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
781 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
782 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
783 }
784
785 /* mac80211 always supports monitor */
786 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
787 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
788
789 /* mac80211 doesn't support more than one IBSS interface right now */
790 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
791 const struct ieee80211_iface_combination *c;
792 int j;
793
794 c = &hw->wiphy->iface_combinations[i];
795
796 for (j = 0; j < c->n_limits; j++)
797 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
798 c->limits[j].max > 1)
799 return -EINVAL;
800 }
801
802#ifndef CONFIG_MAC80211_MESH
803 /* mesh depends on Kconfig, but drivers should set it if they want */
804 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
805#endif
806
807 /* if the underlying driver supports mesh, mac80211 will (at least)
808 * provide routing of mesh authentication frames to userspace */
809 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
810 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
811
812 /* mac80211 supports control port protocol changing */
813 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
814
815 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
816 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
817 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
818 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
819
820 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
821 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
822 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
823
824 /*
825 * Calculate scan IE length -- we need this to alloc
826 * memory and to subtract from the driver limit. It
827 * includes the DS Params, (extended) supported rates, and HT
828 * information -- SSID is the driver's responsibility.
829 */
830 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
831 3 /* DS Params */;
832 if (supp_ht)
833 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
834
835 if (supp_vht) {
836 local->scan_ies_len +=
837 2 + sizeof(struct ieee80211_vht_cap);
838
839 /*
840 * (for now at least), drivers wanting to use VHT must
841 * support channel contexts, as they contain all the
842 * necessary VHT information and the global hw config
843 * doesn't (yet)
844 */
845 if (WARN_ON(!local->use_chanctx)) {
846 result = -EINVAL;
847 goto fail_wiphy_register;
848 }
849 }
850
851 if (!local->ops->hw_scan) {
852 /* For hw_scan, driver needs to set these up. */
853 local->hw.wiphy->max_scan_ssids = 4;
854 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
855 }
856
857 /*
858 * If the driver supports any scan IEs, then assume the
859 * limit includes the IEs mac80211 will add, otherwise
860 * leave it at zero and let the driver sort it out; we
861 * still pass our IEs to the driver but userspace will
862 * not be allowed to in that case.
863 */
864 if (local->hw.wiphy->max_scan_ie_len)
865 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
866
867 /* Set up cipher suites unless driver already did */
868 if (!local->hw.wiphy->cipher_suites) {
869 local->hw.wiphy->cipher_suites = cipher_suites;
870 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
871 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
872 local->hw.wiphy->n_cipher_suites--;
873 }
874 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
875 if (local->hw.wiphy->cipher_suites == cipher_suites) {
876 local->hw.wiphy->cipher_suites += 2;
877 local->hw.wiphy->n_cipher_suites -= 2;
878 } else {
879 u32 *suites;
880 int r, w = 0;
881
882 /* Filter out WEP */
883
884 suites = kmemdup(
885 local->hw.wiphy->cipher_suites,
886 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
887 GFP_KERNEL);
888 if (!suites) {
889 result = -ENOMEM;
890 goto fail_wiphy_register;
891 }
892 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
893 u32 suite = local->hw.wiphy->cipher_suites[r];
894 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
895 suite == WLAN_CIPHER_SUITE_WEP104)
896 continue;
897 suites[w++] = suite;
898 }
899 local->hw.wiphy->cipher_suites = suites;
900 local->hw.wiphy->n_cipher_suites = w;
901 local->wiphy_ciphers_allocated = true;
902 }
903 }
904
905 if (!local->ops->remain_on_channel)
906 local->hw.wiphy->max_remain_on_channel_duration = 5000;
907
908 if (local->ops->sched_scan_start)
909 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
910
911 /* mac80211 based drivers don't support internal TDLS setup */
912 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
913 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
914
915 result = wiphy_register(local->hw.wiphy);
916 if (result < 0)
917 goto fail_wiphy_register;
918
919 /*
920 * We use the number of queues for feature tests (QoS, HT) internally
921 * so restrict them appropriately.
922 */
923 if (hw->queues > IEEE80211_MAX_QUEUES)
924 hw->queues = IEEE80211_MAX_QUEUES;
925
926 local->workqueue =
927 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
928 if (!local->workqueue) {
929 result = -ENOMEM;
930 goto fail_workqueue;
931 }
932
933 /*
934 * The hardware needs headroom for sending the frame,
935 * and we need some headroom for passing the frame to monitor
936 * interfaces, but never both at the same time.
937 */
938 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
939 IEEE80211_TX_STATUS_HEADROOM);
940
941 debugfs_hw_add(local);
942
943 /*
944 * if the driver doesn't specify a max listen interval we
945 * use 5 which should be a safe default
946 */
947 if (local->hw.max_listen_interval == 0)
948 local->hw.max_listen_interval = 5;
949
950 local->hw.conf.listen_interval = local->hw.max_listen_interval;
951
952 local->dynamic_ps_forced_timeout = -1;
953
954 result = ieee80211_wep_init(local);
955 if (result < 0)
956 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
957 result);
958
959 ieee80211_led_init(local);
960
961 rtnl_lock();
962
963 result = ieee80211_init_rate_ctrl_alg(local,
964 hw->rate_control_algorithm);
965 if (result < 0) {
966 wiphy_debug(local->hw.wiphy,
967 "Failed to initialize rate control algorithm\n");
968 goto fail_rate;
969 }
970
971 /* add one default STA interface if supported */
972 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
973 result = ieee80211_if_add(local, "wlan%d", NULL,
974 NL80211_IFTYPE_STATION, NULL);
975 if (result)
976 wiphy_warn(local->hw.wiphy,
977 "Failed to add default virtual iface\n");
978 }
979
980 rtnl_unlock();
981
982 local->network_latency_notifier.notifier_call =
983 ieee80211_max_network_latency;
984 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
985 &local->network_latency_notifier);
986 if (result) {
987 rtnl_lock();
988 goto fail_pm_qos;
989 }
990
991#ifdef CONFIG_INET
992 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
993 result = register_inetaddr_notifier(&local->ifa_notifier);
994 if (result)
995 goto fail_ifa;
996#endif
997
998#if IS_ENABLED(CONFIG_IPV6)
999 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1000 result = register_inet6addr_notifier(&local->ifa6_notifier);
1001 if (result)
1002 goto fail_ifa6;
1003#endif
1004
1005 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
1006 local->hw.napi_weight);
1007
1008 return 0;
1009
1010#if IS_ENABLED(CONFIG_IPV6)
1011 fail_ifa6:
1012#ifdef CONFIG_INET
1013 unregister_inetaddr_notifier(&local->ifa_notifier);
1014#endif
1015#endif
1016#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1017 fail_ifa:
1018 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1019 &local->network_latency_notifier);
1020 rtnl_lock();
1021#endif
1022 fail_pm_qos:
1023 ieee80211_led_exit(local);
1024 ieee80211_remove_interfaces(local);
1025 fail_rate:
1026 rtnl_unlock();
1027 ieee80211_wep_free(local);
1028 sta_info_stop(local);
1029 destroy_workqueue(local->workqueue);
1030 fail_workqueue:
1031 wiphy_unregister(local->hw.wiphy);
1032 fail_wiphy_register:
1033 if (local->wiphy_ciphers_allocated)
1034 kfree(local->hw.wiphy->cipher_suites);
1035 kfree(local->int_scan_req);
1036 return result;
1037}
1038EXPORT_SYMBOL(ieee80211_register_hw);
1039
1040void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1041{
1042 struct ieee80211_local *local = hw_to_local(hw);
1043
1044 tasklet_kill(&local->tx_pending_tasklet);
1045 tasklet_kill(&local->tasklet);
1046
1047 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1048 &local->network_latency_notifier);
1049#ifdef CONFIG_INET
1050 unregister_inetaddr_notifier(&local->ifa_notifier);
1051#endif
1052#if IS_ENABLED(CONFIG_IPV6)
1053 unregister_inet6addr_notifier(&local->ifa6_notifier);
1054#endif
1055
1056 rtnl_lock();
1057
1058 /*
1059 * At this point, interface list manipulations are fine
1060 * because the driver cannot be handing us frames any
1061 * more and the tasklet is killed.
1062 */
1063 ieee80211_remove_interfaces(local);
1064
1065 rtnl_unlock();
1066
1067 cancel_work_sync(&local->restart_work);
1068 cancel_work_sync(&local->reconfig_filter);
1069
1070 ieee80211_clear_tx_pending(local);
1071 rate_control_deinitialize(local);
1072
1073 if (skb_queue_len(&local->skb_queue) ||
1074 skb_queue_len(&local->skb_queue_unreliable))
1075 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1076 skb_queue_purge(&local->skb_queue);
1077 skb_queue_purge(&local->skb_queue_unreliable);
1078
1079 destroy_workqueue(local->workqueue);
1080 wiphy_unregister(local->hw.wiphy);
1081 sta_info_stop(local);
1082 ieee80211_wep_free(local);
1083 ieee80211_led_exit(local);
1084 kfree(local->int_scan_req);
1085}
1086EXPORT_SYMBOL(ieee80211_unregister_hw);
1087
1088static int ieee80211_free_ack_frame(int id, void *p, void *data)
1089{
1090 WARN_ONCE(1, "Have pending ack frames!\n");
1091 kfree_skb(p);
1092 return 0;
1093}
1094
1095void ieee80211_free_hw(struct ieee80211_hw *hw)
1096{
1097 struct ieee80211_local *local = hw_to_local(hw);
1098
1099 mutex_destroy(&local->iflist_mtx);
1100 mutex_destroy(&local->mtx);
1101
1102 if (local->wiphy_ciphers_allocated)
1103 kfree(local->hw.wiphy->cipher_suites);
1104
1105 idr_for_each(&local->ack_status_frames,
1106 ieee80211_free_ack_frame, NULL);
1107 idr_destroy(&local->ack_status_frames);
1108
1109 wiphy_free(local->hw.wiphy);
1110}
1111EXPORT_SYMBOL(ieee80211_free_hw);
1112
1113static int __init ieee80211_init(void)
1114{
1115 struct sk_buff *skb;
1116 int ret;
1117
1118 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1119 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1120 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1121
1122 ret = rc80211_minstrel_init();
1123 if (ret)
1124 return ret;
1125
1126 ret = rc80211_minstrel_ht_init();
1127 if (ret)
1128 goto err_minstrel;
1129
1130 ret = rc80211_pid_init();
1131 if (ret)
1132 goto err_pid;
1133
1134 ret = ieee80211_iface_init();
1135 if (ret)
1136 goto err_netdev;
1137
1138 return 0;
1139 err_netdev:
1140 rc80211_pid_exit();
1141 err_pid:
1142 rc80211_minstrel_ht_exit();
1143 err_minstrel:
1144 rc80211_minstrel_exit();
1145
1146 return ret;
1147}
1148
1149static void __exit ieee80211_exit(void)
1150{
1151 rc80211_pid_exit();
1152 rc80211_minstrel_ht_exit();
1153 rc80211_minstrel_exit();
1154
1155 if (mesh_allocated)
1156 ieee80211s_stop();
1157
1158 ieee80211_iface_exit();
1159
1160 rcu_barrier();
1161}
1162
1163
1164subsys_initcall(ieee80211_init);
1165module_exit(ieee80211_exit);
1166
1167MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1168MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)