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 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2017 Intel Deutschland GmbH
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <net/mac80211.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/netdevice.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.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 spin_lock_bh(&local->filter_lock);
69 changed_flags = local->filter_flags ^ new_flags;
70
71 mc = drv_prepare_multicast(local, &local->mc_list);
72 spin_unlock_bh(&local->filter_lock);
73
74 /* be a bit nasty */
75 new_flags |= (1<<31);
76
77 drv_configure_filter(local, changed_flags, &new_flags, mc);
78
79 WARN_ON(new_flags & (1<<31));
80
81 local->filter_flags = new_flags & ~(1<<31);
82 }
83
ieee80211_reconfig_filter(struct work_struct * work)84 static void ieee80211_reconfig_filter(struct work_struct *work)
85 {
86 struct ieee80211_local *local =
87 container_of(work, struct ieee80211_local, reconfig_filter);
88
89 ieee80211_configure_filter(local);
90 }
91
ieee80211_hw_conf_chan(struct ieee80211_local * local)92 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
93 {
94 struct ieee80211_sub_if_data *sdata;
95 struct cfg80211_chan_def chandef = {};
96 u32 changed = 0;
97 int power;
98 u32 offchannel_flag;
99
100 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
101
102 if (local->scan_chandef.chan) {
103 chandef = local->scan_chandef;
104 } else if (local->tmp_channel) {
105 chandef.chan = local->tmp_channel;
106 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
107 chandef.center_freq1 = chandef.chan->center_freq;
108 } else
109 chandef = local->_oper_chandef;
110
111 WARN(!cfg80211_chandef_valid(&chandef),
112 "control:%d MHz width:%d center: %d/%d MHz",
113 chandef.chan->center_freq, chandef.width,
114 chandef.center_freq1, chandef.center_freq2);
115
116 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
117 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
118 else
119 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
120
121 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
122
123 if (offchannel_flag ||
124 !cfg80211_chandef_identical(&local->hw.conf.chandef,
125 &local->_oper_chandef)) {
126 local->hw.conf.chandef = chandef;
127 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
128 }
129
130 if (!conf_is_ht(&local->hw.conf)) {
131 /*
132 * mac80211.h documents that this is only valid
133 * when the channel is set to an HT type, and
134 * that otherwise STATIC is used.
135 */
136 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
137 } else if (local->hw.conf.smps_mode != local->smps_mode) {
138 local->hw.conf.smps_mode = local->smps_mode;
139 changed |= IEEE80211_CONF_CHANGE_SMPS;
140 }
141
142 power = ieee80211_chandef_max_power(&chandef);
143
144 rcu_read_lock();
145 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
146 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
147 continue;
148 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
149 continue;
150 power = min(power, sdata->vif.bss_conf.txpower);
151 }
152 rcu_read_unlock();
153
154 if (local->hw.conf.power_level != power) {
155 changed |= IEEE80211_CONF_CHANGE_POWER;
156 local->hw.conf.power_level = power;
157 }
158
159 return changed;
160 }
161
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)162 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
163 {
164 int ret = 0;
165
166 might_sleep();
167
168 if (!local->use_chanctx)
169 changed |= ieee80211_hw_conf_chan(local);
170 else
171 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
172 IEEE80211_CONF_CHANGE_POWER);
173
174 if (changed && local->open_count) {
175 ret = drv_config(local, changed);
176 /*
177 * Goal:
178 * HW reconfiguration should never fail, the driver has told
179 * us what it can support so it should live up to that promise.
180 *
181 * Current status:
182 * rfkill is not integrated with mac80211 and a
183 * configuration command can thus fail if hardware rfkill
184 * is enabled
185 *
186 * FIXME: integrate rfkill with mac80211 and then add this
187 * WARN_ON() back
188 *
189 */
190 /* WARN_ON(ret); */
191 }
192
193 return ret;
194 }
195
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u32 changed)196 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
197 u32 changed)
198 {
199 struct ieee80211_local *local = sdata->local;
200
201 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
202 return;
203
204 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
205 }
206
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)207 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
208 {
209 sdata->vif.bss_conf.use_cts_prot = false;
210 sdata->vif.bss_conf.use_short_preamble = false;
211 sdata->vif.bss_conf.use_short_slot = false;
212 return BSS_CHANGED_ERP_CTS_PROT |
213 BSS_CHANGED_ERP_PREAMBLE |
214 BSS_CHANGED_ERP_SLOT;
215 }
216
ieee80211_tasklet_handler(unsigned long data)217 static void ieee80211_tasklet_handler(unsigned long data)
218 {
219 struct ieee80211_local *local = (struct ieee80211_local *) data;
220 struct sk_buff *skb;
221
222 while ((skb = skb_dequeue(&local->skb_queue)) ||
223 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
224 switch (skb->pkt_type) {
225 case IEEE80211_RX_MSG:
226 /* Clear skb->pkt_type in order to not confuse kernel
227 * netstack. */
228 skb->pkt_type = 0;
229 ieee80211_rx(&local->hw, skb);
230 break;
231 case IEEE80211_TX_STATUS_MSG:
232 skb->pkt_type = 0;
233 ieee80211_tx_status(&local->hw, skb);
234 break;
235 default:
236 WARN(1, "mac80211: Packet is of unknown type %d\n",
237 skb->pkt_type);
238 dev_kfree_skb(skb);
239 break;
240 }
241 }
242 }
243
ieee80211_restart_work(struct work_struct * work)244 static void ieee80211_restart_work(struct work_struct *work)
245 {
246 struct ieee80211_local *local =
247 container_of(work, struct ieee80211_local, restart_work);
248 struct ieee80211_sub_if_data *sdata;
249
250 /* wait for scan work complete */
251 flush_workqueue(local->workqueue);
252 flush_work(&local->sched_scan_stopped_work);
253
254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
255 "%s called with hardware scan in progress\n", __func__);
256
257 flush_work(&local->radar_detected_work);
258 rtnl_lock();
259 list_for_each_entry(sdata, &local->interfaces, list) {
260 /*
261 * XXX: there may be more work for other vif types and even
262 * for station mode: a good thing would be to run most of
263 * the iface type's dependent _stop (ieee80211_mg_stop,
264 * ieee80211_ibss_stop) etc...
265 * For now, fix only the specific bug that was seen: race
266 * between csa_connection_drop_work and us.
267 */
268 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
269 /*
270 * This worker is scheduled from the iface worker that
271 * runs on mac80211's workqueue, so we can't be
272 * scheduling this worker after the cancel right here.
273 * The exception is ieee80211_chswitch_done.
274 * Then we can have a race...
275 */
276 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
277 }
278 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
279 }
280 ieee80211_scan_cancel(local);
281
282 /* make sure any new ROC will consider local->in_reconfig */
283 flush_delayed_work(&local->roc_work);
284 flush_work(&local->hw_roc_done);
285
286 /* wait for all packet processing to be done */
287 synchronize_net();
288
289 ieee80211_reconfig(local);
290 rtnl_unlock();
291 }
292
ieee80211_restart_hw(struct ieee80211_hw * hw)293 void ieee80211_restart_hw(struct ieee80211_hw *hw)
294 {
295 struct ieee80211_local *local = hw_to_local(hw);
296
297 trace_api_restart_hw(local);
298
299 wiphy_info(hw->wiphy,
300 "Hardware restart was requested\n");
301
302 /* use this reason, ieee80211_reconfig will unblock it */
303 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
304 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
305 false);
306
307 /*
308 * Stop all Rx during the reconfig. We don't want state changes
309 * or driver callbacks while this is in progress.
310 */
311 local->in_reconfig = true;
312 barrier();
313
314 queue_work(system_freezable_wq, &local->restart_work);
315 }
316 EXPORT_SYMBOL(ieee80211_restart_hw);
317
318 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)319 static int ieee80211_ifa_changed(struct notifier_block *nb,
320 unsigned long data, void *arg)
321 {
322 struct in_ifaddr *ifa = arg;
323 struct ieee80211_local *local =
324 container_of(nb, struct ieee80211_local,
325 ifa_notifier);
326 struct net_device *ndev = ifa->ifa_dev->dev;
327 struct wireless_dev *wdev = ndev->ieee80211_ptr;
328 struct in_device *idev;
329 struct ieee80211_sub_if_data *sdata;
330 struct ieee80211_bss_conf *bss_conf;
331 struct ieee80211_if_managed *ifmgd;
332 int c = 0;
333
334 /* Make sure it's our interface that got changed */
335 if (!wdev)
336 return NOTIFY_DONE;
337
338 if (wdev->wiphy != local->hw.wiphy)
339 return NOTIFY_DONE;
340
341 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
342 bss_conf = &sdata->vif.bss_conf;
343
344 /* ARP filtering is only supported in managed mode */
345 if (sdata->vif.type != NL80211_IFTYPE_STATION)
346 return NOTIFY_DONE;
347
348 idev = __in_dev_get_rtnl(sdata->dev);
349 if (!idev)
350 return NOTIFY_DONE;
351
352 ifmgd = &sdata->u.mgd;
353 sdata_lock(sdata);
354
355 /* Copy the addresses to the bss_conf list */
356 ifa = idev->ifa_list;
357 while (ifa) {
358 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
359 bss_conf->arp_addr_list[c] = ifa->ifa_address;
360 ifa = ifa->ifa_next;
361 c++;
362 }
363
364 bss_conf->arp_addr_cnt = c;
365
366 /* Configure driver only if associated (which also implies it is up) */
367 if (ifmgd->associated)
368 ieee80211_bss_info_change_notify(sdata,
369 BSS_CHANGED_ARP_FILTER);
370
371 sdata_unlock(sdata);
372
373 return NOTIFY_OK;
374 }
375 #endif
376
377 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)378 static int ieee80211_ifa6_changed(struct notifier_block *nb,
379 unsigned long data, void *arg)
380 {
381 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
382 struct inet6_dev *idev = ifa->idev;
383 struct net_device *ndev = ifa->idev->dev;
384 struct ieee80211_local *local =
385 container_of(nb, struct ieee80211_local, ifa6_notifier);
386 struct wireless_dev *wdev = ndev->ieee80211_ptr;
387 struct ieee80211_sub_if_data *sdata;
388
389 /* Make sure it's our interface that got changed */
390 if (!wdev || wdev->wiphy != local->hw.wiphy)
391 return NOTIFY_DONE;
392
393 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
394
395 /*
396 * For now only support station mode. This is mostly because
397 * doing AP would have to handle AP_VLAN in some way ...
398 */
399 if (sdata->vif.type != NL80211_IFTYPE_STATION)
400 return NOTIFY_DONE;
401
402 drv_ipv6_addr_change(local, sdata, idev);
403
404 return NOTIFY_OK;
405 }
406 #endif
407
408 /* There isn't a lot of sense in it, but you can transmit anything you like */
409 static const struct ieee80211_txrx_stypes
410 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
411 [NL80211_IFTYPE_ADHOC] = {
412 .tx = 0xffff,
413 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
414 BIT(IEEE80211_STYPE_AUTH >> 4) |
415 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
416 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
417 },
418 [NL80211_IFTYPE_STATION] = {
419 .tx = 0xffff,
420 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
421 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
422 },
423 [NL80211_IFTYPE_AP] = {
424 .tx = 0xffff,
425 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
426 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
428 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
429 BIT(IEEE80211_STYPE_AUTH >> 4) |
430 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
431 BIT(IEEE80211_STYPE_ACTION >> 4),
432 },
433 [NL80211_IFTYPE_AP_VLAN] = {
434 /* copy AP */
435 .tx = 0xffff,
436 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
437 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
439 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
440 BIT(IEEE80211_STYPE_AUTH >> 4) |
441 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
442 BIT(IEEE80211_STYPE_ACTION >> 4),
443 },
444 [NL80211_IFTYPE_P2P_CLIENT] = {
445 .tx = 0xffff,
446 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
447 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
448 },
449 [NL80211_IFTYPE_P2P_GO] = {
450 .tx = 0xffff,
451 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
452 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
453 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
454 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
455 BIT(IEEE80211_STYPE_AUTH >> 4) |
456 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
457 BIT(IEEE80211_STYPE_ACTION >> 4),
458 },
459 [NL80211_IFTYPE_MESH_POINT] = {
460 .tx = 0xffff,
461 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
462 BIT(IEEE80211_STYPE_AUTH >> 4) |
463 BIT(IEEE80211_STYPE_DEAUTH >> 4),
464 },
465 [NL80211_IFTYPE_P2P_DEVICE] = {
466 .tx = 0xffff,
467 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
468 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
469 },
470 };
471
472 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
473 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
474 IEEE80211_HT_AMPDU_PARM_DENSITY,
475
476 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
477 IEEE80211_HT_CAP_MAX_AMSDU |
478 IEEE80211_HT_CAP_SGI_20 |
479 IEEE80211_HT_CAP_SGI_40 |
480 IEEE80211_HT_CAP_LDPC_CODING |
481 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
482 .mcs = {
483 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
484 0xff, 0xff, 0xff, 0xff, 0xff, },
485 },
486 };
487
488 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
489 .vht_cap_info =
490 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
491 IEEE80211_VHT_CAP_SHORT_GI_80 |
492 IEEE80211_VHT_CAP_SHORT_GI_160 |
493 IEEE80211_VHT_CAP_RXSTBC_MASK |
494 IEEE80211_VHT_CAP_TXSTBC |
495 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
496 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
497 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
498 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
499 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
500 .supp_mcs = {
501 .rx_mcs_map = cpu_to_le16(~0),
502 .tx_mcs_map = cpu_to_le16(~0),
503 },
504 };
505
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)506 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
507 const struct ieee80211_ops *ops,
508 const char *requested_name)
509 {
510 struct ieee80211_local *local;
511 int priv_size, i;
512 struct wiphy *wiphy;
513 bool use_chanctx;
514
515 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
516 !ops->add_interface || !ops->remove_interface ||
517 !ops->configure_filter))
518 return NULL;
519
520 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
521 return NULL;
522
523 /* check all or no channel context operations exist */
524 i = !!ops->add_chanctx + !!ops->remove_chanctx +
525 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
526 !!ops->unassign_vif_chanctx;
527 if (WARN_ON(i != 0 && i != 5))
528 return NULL;
529 use_chanctx = i == 5;
530
531 /* Ensure 32-byte alignment of our private data and hw private data.
532 * We use the wiphy priv data for both our ieee80211_local and for
533 * the driver's private data
534 *
535 * In memory it'll be like this:
536 *
537 * +-------------------------+
538 * | struct wiphy |
539 * +-------------------------+
540 * | struct ieee80211_local |
541 * +-------------------------+
542 * | driver's private data |
543 * +-------------------------+
544 *
545 */
546 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
547
548 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
549
550 if (!wiphy)
551 return NULL;
552
553 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
554
555 wiphy->privid = mac80211_wiphy_privid;
556
557 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
558 WIPHY_FLAG_4ADDR_AP |
559 WIPHY_FLAG_4ADDR_STATION |
560 WIPHY_FLAG_REPORTS_OBSS |
561 WIPHY_FLAG_OFFCHAN_TX;
562
563 if (ops->remain_on_channel)
564 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
565
566 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
567 NL80211_FEATURE_SAE |
568 NL80211_FEATURE_HT_IBSS |
569 NL80211_FEATURE_VIF_TXPOWER |
570 NL80211_FEATURE_MAC_ON_CREATE |
571 NL80211_FEATURE_USERSPACE_MPM |
572 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
573 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
574 wiphy_ext_feature_set(wiphy,
575 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
576
577 if (!ops->hw_scan) {
578 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
579 NL80211_FEATURE_AP_SCAN;
580 /*
581 * if the driver behaves correctly using the probe request
582 * (template) from mac80211, then both of these should be
583 * supported even with hw scan - but let drivers opt in.
584 */
585 wiphy_ext_feature_set(wiphy,
586 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
587 wiphy_ext_feature_set(wiphy,
588 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
589 }
590
591 if (!ops->set_key)
592 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
593
594 if (ops->wake_tx_queue)
595 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
596
597 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
598
599 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
600
601 local = wiphy_priv(wiphy);
602
603 if (sta_info_init(local))
604 goto err_free;
605
606 local->hw.wiphy = wiphy;
607
608 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
609
610 local->ops = ops;
611 local->use_chanctx = use_chanctx;
612
613 /* set up some defaults */
614 local->hw.queues = 1;
615 local->hw.max_rates = 1;
616 local->hw.max_report_rates = 0;
617 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
618 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
619 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
620 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
621 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
622 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
623 IEEE80211_RADIOTAP_MCS_HAVE_GI |
624 IEEE80211_RADIOTAP_MCS_HAVE_BW;
625 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
626 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
627 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
628 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
629 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
630 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
631 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
632
633 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
634
635 wiphy->extended_capabilities = local->ext_capa;
636 wiphy->extended_capabilities_mask = local->ext_capa;
637 wiphy->extended_capabilities_len =
638 ARRAY_SIZE(local->ext_capa);
639
640 INIT_LIST_HEAD(&local->interfaces);
641 INIT_LIST_HEAD(&local->mon_list);
642
643 __hw_addr_init(&local->mc_list);
644
645 mutex_init(&local->iflist_mtx);
646 mutex_init(&local->mtx);
647
648 mutex_init(&local->key_mtx);
649 spin_lock_init(&local->filter_lock);
650 spin_lock_init(&local->rx_path_lock);
651 spin_lock_init(&local->queue_stop_reason_lock);
652
653 INIT_LIST_HEAD(&local->chanctx_list);
654 mutex_init(&local->chanctx_mtx);
655
656 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
657
658 INIT_WORK(&local->restart_work, ieee80211_restart_work);
659
660 INIT_WORK(&local->radar_detected_work,
661 ieee80211_dfs_radar_detected_work);
662
663 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
664 local->smps_mode = IEEE80211_SMPS_OFF;
665
666 INIT_WORK(&local->dynamic_ps_enable_work,
667 ieee80211_dynamic_ps_enable_work);
668 INIT_WORK(&local->dynamic_ps_disable_work,
669 ieee80211_dynamic_ps_disable_work);
670 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
671
672 INIT_WORK(&local->sched_scan_stopped_work,
673 ieee80211_sched_scan_stopped_work);
674
675 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
676
677 spin_lock_init(&local->ack_status_lock);
678 idr_init(&local->ack_status_frames);
679
680 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
681 skb_queue_head_init(&local->pending[i]);
682 atomic_set(&local->agg_queue_stop[i], 0);
683 }
684 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
685 (unsigned long)local);
686
687 tasklet_init(&local->tasklet,
688 ieee80211_tasklet_handler,
689 (unsigned long) local);
690
691 skb_queue_head_init(&local->skb_queue);
692 skb_queue_head_init(&local->skb_queue_unreliable);
693 skb_queue_head_init(&local->skb_queue_tdls_chsw);
694
695 ieee80211_alloc_led_names(local);
696
697 ieee80211_roc_setup(local);
698
699 local->hw.radiotap_timestamp.units_pos = -1;
700 local->hw.radiotap_timestamp.accuracy = -1;
701
702 return &local->hw;
703 err_free:
704 wiphy_free(wiphy);
705 return NULL;
706 }
707 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
708
ieee80211_init_cipher_suites(struct ieee80211_local * local)709 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
710 {
711 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
712 IS_ERR(local->wep_rx_tfm));
713 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
714 int n_suites = 0, r = 0, w = 0;
715 u32 *suites;
716 static const u32 cipher_suites[] = {
717 /* keep WEP first, it may be removed below */
718 WLAN_CIPHER_SUITE_WEP40,
719 WLAN_CIPHER_SUITE_WEP104,
720 WLAN_CIPHER_SUITE_TKIP,
721 WLAN_CIPHER_SUITE_CCMP,
722 WLAN_CIPHER_SUITE_CCMP_256,
723 WLAN_CIPHER_SUITE_GCMP,
724 WLAN_CIPHER_SUITE_GCMP_256,
725
726 /* keep last -- depends on hw flags! */
727 WLAN_CIPHER_SUITE_AES_CMAC,
728 WLAN_CIPHER_SUITE_BIP_CMAC_256,
729 WLAN_CIPHER_SUITE_BIP_GMAC_128,
730 WLAN_CIPHER_SUITE_BIP_GMAC_256,
731 };
732
733 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
734 local->hw.wiphy->cipher_suites) {
735 /* If the driver advertises, or doesn't support SW crypto,
736 * we only need to remove WEP if necessary.
737 */
738 if (have_wep)
739 return 0;
740
741 /* well if it has _no_ ciphers ... fine */
742 if (!local->hw.wiphy->n_cipher_suites)
743 return 0;
744
745 /* Driver provides cipher suites, but we need to exclude WEP */
746 suites = kmemdup(local->hw.wiphy->cipher_suites,
747 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
748 GFP_KERNEL);
749 if (!suites)
750 return -ENOMEM;
751
752 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
753 u32 suite = local->hw.wiphy->cipher_suites[r];
754
755 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
756 suite == WLAN_CIPHER_SUITE_WEP104)
757 continue;
758 suites[w++] = suite;
759 }
760 } else if (!local->hw.cipher_schemes) {
761 /* If the driver doesn't have cipher schemes, there's nothing
762 * else to do other than assign the (software supported and
763 * perhaps offloaded) cipher suites.
764 */
765 local->hw.wiphy->cipher_suites = cipher_suites;
766 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
767
768 if (!have_mfp)
769 local->hw.wiphy->n_cipher_suites -= 4;
770
771 if (!have_wep) {
772 local->hw.wiphy->cipher_suites += 2;
773 local->hw.wiphy->n_cipher_suites -= 2;
774 }
775
776 /* not dynamically allocated, so just return */
777 return 0;
778 } else {
779 const struct ieee80211_cipher_scheme *cs;
780
781 cs = local->hw.cipher_schemes;
782
783 /* Driver specifies cipher schemes only (but not cipher suites
784 * including the schemes)
785 *
786 * We start counting ciphers defined by schemes, TKIP, CCMP,
787 * CCMP-256, GCMP, and GCMP-256
788 */
789 n_suites = local->hw.n_cipher_schemes + 5;
790
791 /* check if we have WEP40 and WEP104 */
792 if (have_wep)
793 n_suites += 2;
794
795 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
796 * BIP-GMAC-256
797 */
798 if (have_mfp)
799 n_suites += 4;
800
801 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
802 if (!suites)
803 return -ENOMEM;
804
805 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
806 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
807 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
808 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
809 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
810
811 if (have_wep) {
812 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
813 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
814 }
815
816 if (have_mfp) {
817 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
818 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
819 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
820 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
821 }
822
823 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
824 suites[w++] = cs[r].cipher;
825 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
826 kfree(suites);
827 return -EINVAL;
828 }
829 }
830 }
831
832 local->hw.wiphy->cipher_suites = suites;
833 local->hw.wiphy->n_cipher_suites = w;
834 local->wiphy_ciphers_allocated = true;
835
836 return 0;
837 }
838
ieee80211_register_hw(struct ieee80211_hw * hw)839 int ieee80211_register_hw(struct ieee80211_hw *hw)
840 {
841 struct ieee80211_local *local = hw_to_local(hw);
842 int result, i;
843 enum nl80211_band band;
844 int channels, max_bitrates;
845 bool supp_ht, supp_vht, supp_he;
846 netdev_features_t feature_whitelist;
847 struct cfg80211_chan_def dflt_chandef = {};
848
849 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
850 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
851 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
852 return -EINVAL;
853
854 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
855 (!local->ops->tdls_channel_switch ||
856 !local->ops->tdls_cancel_channel_switch ||
857 !local->ops->tdls_recv_channel_switch))
858 return -EOPNOTSUPP;
859
860 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
861 !local->ops->set_frag_threshold))
862 return -EINVAL;
863
864 if (WARN_ON(local->hw.wiphy->interface_modes &
865 BIT(NL80211_IFTYPE_NAN) &&
866 (!local->ops->start_nan || !local->ops->stop_nan)))
867 return -EINVAL;
868
869 #ifdef CONFIG_PM
870 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
871 return -EINVAL;
872 #endif
873
874 if (!local->use_chanctx) {
875 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
876 const struct ieee80211_iface_combination *comb;
877
878 comb = &local->hw.wiphy->iface_combinations[i];
879
880 if (comb->num_different_channels > 1)
881 return -EINVAL;
882 }
883 } else {
884 /*
885 * WDS is currently prohibited when channel contexts are used
886 * because there's no clear definition of which channel WDS
887 * type interfaces use
888 */
889 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
890 return -EINVAL;
891
892 /* DFS is not supported with multi-channel combinations yet */
893 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
894 const struct ieee80211_iface_combination *comb;
895
896 comb = &local->hw.wiphy->iface_combinations[i];
897
898 if (comb->radar_detect_widths &&
899 comb->num_different_channels > 1)
900 return -EINVAL;
901 }
902 }
903
904 /* Only HW csum features are currently compatible with mac80211 */
905 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
906 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
907 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
908 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
909 return -EINVAL;
910
911 if (hw->max_report_rates == 0)
912 hw->max_report_rates = hw->max_rates;
913
914 local->rx_chains = 1;
915
916 /*
917 * generic code guarantees at least one band,
918 * set this very early because much code assumes
919 * that hw.conf.channel is assigned
920 */
921 channels = 0;
922 max_bitrates = 0;
923 supp_ht = false;
924 supp_vht = false;
925 supp_he = false;
926 for (band = 0; band < NUM_NL80211_BANDS; band++) {
927 struct ieee80211_supported_band *sband;
928
929 sband = local->hw.wiphy->bands[band];
930 if (!sband)
931 continue;
932
933 if (!dflt_chandef.chan) {
934 cfg80211_chandef_create(&dflt_chandef,
935 &sband->channels[0],
936 NL80211_CHAN_NO_HT);
937 /* init channel we're on */
938 if (!local->use_chanctx && !local->_oper_chandef.chan) {
939 local->hw.conf.chandef = dflt_chandef;
940 local->_oper_chandef = dflt_chandef;
941 }
942 local->monitor_chandef = dflt_chandef;
943 }
944
945 channels += sband->n_channels;
946
947 if (max_bitrates < sband->n_bitrates)
948 max_bitrates = sband->n_bitrates;
949 supp_ht = supp_ht || sband->ht_cap.ht_supported;
950 supp_vht = supp_vht || sband->vht_cap.vht_supported;
951
952 if (!supp_he)
953 supp_he = !!ieee80211_get_he_sta_cap(sband);
954
955 if (!sband->ht_cap.ht_supported)
956 continue;
957
958 /* TODO: consider VHT for RX chains, hopefully it's the same */
959 local->rx_chains =
960 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
961 local->rx_chains);
962
963 /* no need to mask, SM_PS_DISABLED has all bits set */
964 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
965 IEEE80211_HT_CAP_SM_PS_SHIFT;
966 }
967
968 /* if low-level driver supports AP, we also support VLAN.
969 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
970 * based on their support to transmit SW encrypted packets.
971 */
972 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
973 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
974 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
975 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
976 }
977
978 /* mac80211 always supports monitor */
979 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
980 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
981
982 /* mac80211 doesn't support more than one IBSS interface right now */
983 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
984 const struct ieee80211_iface_combination *c;
985 int j;
986
987 c = &hw->wiphy->iface_combinations[i];
988
989 for (j = 0; j < c->n_limits; j++)
990 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
991 c->limits[j].max > 1)
992 return -EINVAL;
993 }
994
995 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
996 sizeof(void *) * channels, GFP_KERNEL);
997 if (!local->int_scan_req)
998 return -ENOMEM;
999
1000 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1001 if (!local->hw.wiphy->bands[band])
1002 continue;
1003 local->int_scan_req->rates[band] = (u32) -1;
1004 }
1005
1006 #ifndef CONFIG_MAC80211_MESH
1007 /* mesh depends on Kconfig, but drivers should set it if they want */
1008 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1009 #endif
1010
1011 /* if the underlying driver supports mesh, mac80211 will (at least)
1012 * provide routing of mesh authentication frames to userspace */
1013 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1014 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1015
1016 /* mac80211 supports control port protocol changing */
1017 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1018
1019 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1020 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1021 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1022 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1023 if (hw->max_signal <= 0) {
1024 result = -EINVAL;
1025 goto fail_wiphy_register;
1026 }
1027 }
1028
1029 /*
1030 * Calculate scan IE length -- we need this to alloc
1031 * memory and to subtract from the driver limit. It
1032 * includes the DS Params, (extended) supported rates, and HT
1033 * information -- SSID is the driver's responsibility.
1034 */
1035 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1036 3 /* DS Params */;
1037 if (supp_ht)
1038 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1039
1040 if (supp_vht)
1041 local->scan_ies_len +=
1042 2 + sizeof(struct ieee80211_vht_cap);
1043
1044 /* HE cap element is variable in size - set len to allow max size */
1045 /*
1046 * TODO: 1 is added at the end of the calculation to accommodate for
1047 * the temporary placing of the HE capabilities IE under EXT.
1048 * Remove it once it is placed in the final place.
1049 */
1050 if (supp_he)
1051 local->scan_ies_len +=
1052 2 + sizeof(struct ieee80211_he_cap_elem) +
1053 sizeof(struct ieee80211_he_mcs_nss_supp) +
1054 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1055
1056 if (!local->ops->hw_scan) {
1057 /* For hw_scan, driver needs to set these up. */
1058 local->hw.wiphy->max_scan_ssids = 4;
1059 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1060 }
1061
1062 /*
1063 * If the driver supports any scan IEs, then assume the
1064 * limit includes the IEs mac80211 will add, otherwise
1065 * leave it at zero and let the driver sort it out; we
1066 * still pass our IEs to the driver but userspace will
1067 * not be allowed to in that case.
1068 */
1069 if (local->hw.wiphy->max_scan_ie_len)
1070 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1071
1072 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1073 local->hw.n_cipher_schemes));
1074
1075 result = ieee80211_init_cipher_suites(local);
1076 if (result < 0)
1077 goto fail_wiphy_register;
1078
1079 if (!local->ops->remain_on_channel)
1080 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1081
1082 /* mac80211 based drivers don't support internal TDLS setup */
1083 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1084 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1085
1086 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1087 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1088 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1089
1090 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1091
1092 result = wiphy_register(local->hw.wiphy);
1093 if (result < 0)
1094 goto fail_wiphy_register;
1095
1096 /*
1097 * We use the number of queues for feature tests (QoS, HT) internally
1098 * so restrict them appropriately.
1099 */
1100 if (hw->queues > IEEE80211_MAX_QUEUES)
1101 hw->queues = IEEE80211_MAX_QUEUES;
1102
1103 local->workqueue =
1104 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1105 if (!local->workqueue) {
1106 result = -ENOMEM;
1107 goto fail_workqueue;
1108 }
1109
1110 /*
1111 * The hardware needs headroom for sending the frame,
1112 * and we need some headroom for passing the frame to monitor
1113 * interfaces, but never both at the same time.
1114 */
1115 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1116 IEEE80211_TX_STATUS_HEADROOM);
1117
1118 debugfs_hw_add(local);
1119
1120 /*
1121 * if the driver doesn't specify a max listen interval we
1122 * use 5 which should be a safe default
1123 */
1124 if (local->hw.max_listen_interval == 0)
1125 local->hw.max_listen_interval = 5;
1126
1127 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1128
1129 local->dynamic_ps_forced_timeout = -1;
1130
1131 if (!local->hw.max_nan_de_entries)
1132 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1133
1134 result = ieee80211_wep_init(local);
1135 if (result < 0)
1136 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1137 result);
1138
1139 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1140
1141 ieee80211_led_init(local);
1142
1143 result = ieee80211_txq_setup_flows(local);
1144 if (result)
1145 goto fail_flows;
1146
1147 rtnl_lock();
1148
1149 result = ieee80211_init_rate_ctrl_alg(local,
1150 hw->rate_control_algorithm);
1151 if (result < 0) {
1152 wiphy_debug(local->hw.wiphy,
1153 "Failed to initialize rate control algorithm\n");
1154 goto fail_rate;
1155 }
1156
1157 /* add one default STA interface if supported */
1158 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1159 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1160 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1161 NL80211_IFTYPE_STATION, NULL);
1162 if (result)
1163 wiphy_warn(local->hw.wiphy,
1164 "Failed to add default virtual iface\n");
1165 }
1166
1167 rtnl_unlock();
1168
1169 #ifdef CONFIG_INET
1170 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1171 result = register_inetaddr_notifier(&local->ifa_notifier);
1172 if (result)
1173 goto fail_ifa;
1174 #endif
1175
1176 #if IS_ENABLED(CONFIG_IPV6)
1177 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1178 result = register_inet6addr_notifier(&local->ifa6_notifier);
1179 if (result)
1180 goto fail_ifa6;
1181 #endif
1182
1183 return 0;
1184
1185 #if IS_ENABLED(CONFIG_IPV6)
1186 fail_ifa6:
1187 #ifdef CONFIG_INET
1188 unregister_inetaddr_notifier(&local->ifa_notifier);
1189 #endif
1190 #endif
1191 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1192 fail_ifa:
1193 #endif
1194 rtnl_lock();
1195 rate_control_deinitialize(local);
1196 ieee80211_remove_interfaces(local);
1197 fail_rate:
1198 rtnl_unlock();
1199 ieee80211_led_exit(local);
1200 ieee80211_wep_free(local);
1201 ieee80211_txq_teardown_flows(local);
1202 fail_flows:
1203 destroy_workqueue(local->workqueue);
1204 fail_workqueue:
1205 wiphy_unregister(local->hw.wiphy);
1206 fail_wiphy_register:
1207 if (local->wiphy_ciphers_allocated)
1208 kfree(local->hw.wiphy->cipher_suites);
1209 kfree(local->int_scan_req);
1210 return result;
1211 }
1212 EXPORT_SYMBOL(ieee80211_register_hw);
1213
ieee80211_unregister_hw(struct ieee80211_hw * hw)1214 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1215 {
1216 struct ieee80211_local *local = hw_to_local(hw);
1217
1218 tasklet_kill(&local->tx_pending_tasklet);
1219 tasklet_kill(&local->tasklet);
1220
1221 #ifdef CONFIG_INET
1222 unregister_inetaddr_notifier(&local->ifa_notifier);
1223 #endif
1224 #if IS_ENABLED(CONFIG_IPV6)
1225 unregister_inet6addr_notifier(&local->ifa6_notifier);
1226 #endif
1227 ieee80211_txq_teardown_flows(local);
1228
1229 rtnl_lock();
1230
1231 /*
1232 * At this point, interface list manipulations are fine
1233 * because the driver cannot be handing us frames any
1234 * more and the tasklet is killed.
1235 */
1236 ieee80211_remove_interfaces(local);
1237
1238 rtnl_unlock();
1239
1240 cancel_delayed_work_sync(&local->roc_work);
1241 cancel_work_sync(&local->restart_work);
1242 cancel_work_sync(&local->reconfig_filter);
1243 cancel_work_sync(&local->tdls_chsw_work);
1244 flush_work(&local->sched_scan_stopped_work);
1245 flush_work(&local->radar_detected_work);
1246
1247 ieee80211_clear_tx_pending(local);
1248 rate_control_deinitialize(local);
1249
1250 if (skb_queue_len(&local->skb_queue) ||
1251 skb_queue_len(&local->skb_queue_unreliable))
1252 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1253 skb_queue_purge(&local->skb_queue);
1254 skb_queue_purge(&local->skb_queue_unreliable);
1255 skb_queue_purge(&local->skb_queue_tdls_chsw);
1256
1257 destroy_workqueue(local->workqueue);
1258 wiphy_unregister(local->hw.wiphy);
1259 ieee80211_wep_free(local);
1260 ieee80211_led_exit(local);
1261 kfree(local->int_scan_req);
1262 }
1263 EXPORT_SYMBOL(ieee80211_unregister_hw);
1264
ieee80211_free_ack_frame(int id,void * p,void * data)1265 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1266 {
1267 WARN_ONCE(1, "Have pending ack frames!\n");
1268 kfree_skb(p);
1269 return 0;
1270 }
1271
ieee80211_free_hw(struct ieee80211_hw * hw)1272 void ieee80211_free_hw(struct ieee80211_hw *hw)
1273 {
1274 struct ieee80211_local *local = hw_to_local(hw);
1275
1276 mutex_destroy(&local->iflist_mtx);
1277 mutex_destroy(&local->mtx);
1278
1279 if (local->wiphy_ciphers_allocated)
1280 kfree(local->hw.wiphy->cipher_suites);
1281
1282 idr_for_each(&local->ack_status_frames,
1283 ieee80211_free_ack_frame, NULL);
1284 idr_destroy(&local->ack_status_frames);
1285
1286 sta_info_stop(local);
1287
1288 ieee80211_free_led_names(local);
1289
1290 wiphy_free(local->hw.wiphy);
1291 }
1292 EXPORT_SYMBOL(ieee80211_free_hw);
1293
ieee80211_init(void)1294 static int __init ieee80211_init(void)
1295 {
1296 struct sk_buff *skb;
1297 int ret;
1298
1299 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1300 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1301 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1302
1303 ret = rc80211_minstrel_init();
1304 if (ret)
1305 return ret;
1306
1307 ret = rc80211_minstrel_ht_init();
1308 if (ret)
1309 goto err_minstrel;
1310
1311 ret = ieee80211_iface_init();
1312 if (ret)
1313 goto err_netdev;
1314
1315 return 0;
1316 err_netdev:
1317 rc80211_minstrel_ht_exit();
1318 err_minstrel:
1319 rc80211_minstrel_exit();
1320
1321 return ret;
1322 }
1323
ieee80211_exit(void)1324 static void __exit ieee80211_exit(void)
1325 {
1326 rc80211_minstrel_ht_exit();
1327 rc80211_minstrel_exit();
1328
1329 ieee80211s_stop();
1330
1331 ieee80211_iface_exit();
1332
1333 rcu_barrier();
1334 }
1335
1336
1337 subsys_initcall(ieee80211_init);
1338 module_exit(ieee80211_exit);
1339
1340 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1341 MODULE_LICENSE("GPL");
1342
