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Merge commit 'linus' into x86/urgent, to pick up recent x86 changes
[linux-2.6/btrfs-unstable.git] / net / mac80211 / main.c
blob175ffcf7fb06bfb5c9c1f95e2c17f42d666ee26f
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 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.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/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 "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38 u64 mc;
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
41
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
44
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
51
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
54
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
57
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
60
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
63
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
66
67 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
69
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
72
73 /* be a bit nasty */
74 new_flags |= (1<<31);
75
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78 WARN_ON(new_flags & (1<<31));
79
80 local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
87
88 ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
95 u32 changed = 0;
96 int power;
97 u32 offchannel_flag;
98
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
107 } else
108 chandef = local->_oper_chandef;
109
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
114
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117 else
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127 }
128
129 if (!conf_is_ht(&local->hw.conf)) {
130 /*
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
134 */
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
139 }
140
141 power = ieee80211_chandef_max_power(&chandef);
142
143 rcu_read_lock();
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146 continue;
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148 continue;
149 power = min(power, sdata->vif.bss_conf.txpower);
150 }
151 rcu_read_unlock();
152
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
156 }
157
158 return changed;
159 }
160
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
162 {
163 int ret = 0;
164
165 might_sleep();
166
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
169 else
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
172
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
175 /*
176 * Goal:
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
179 *
180 * Current status:
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
183 * is enabled
184 *
185 * FIXME: integrate rfkill with mac80211 and then add this
186 * WARN_ON() back
187 *
188 */
189 /* WARN_ON(ret); */
190 }
191
192 return ret;
193 }
194
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
196 u32 changed)
197 {
198 struct ieee80211_local *local = sdata->local;
199
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
201 return;
202
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
204 }
205
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207 {
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
214 }
215
216 static void ieee80211_tasklet_handler(unsigned long data)
217 {
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
219 struct sk_buff *skb;
220
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
226 * netstack. */
227 skb->pkt_type = 0;
228 ieee80211_rx(&local->hw, skb);
229 break;
230 case IEEE80211_TX_STATUS_MSG:
231 skb->pkt_type = 0;
232 ieee80211_tx_status(&local->hw, skb);
233 break;
234 default:
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
236 skb->pkt_type);
237 dev_kfree_skb(skb);
238 break;
239 }
240 }
241 }
242
243 static void ieee80211_restart_work(struct work_struct *work)
244 {
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
248
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251
252 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
253 "%s called with hardware scan in progress\n", __func__);
254
255 rtnl_lock();
256 list_for_each_entry(sdata, &local->interfaces, list)
257 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
258 ieee80211_scan_cancel(local);
259 ieee80211_reconfig(local);
260 rtnl_unlock();
261 }
262
263 void ieee80211_restart_hw(struct ieee80211_hw *hw)
264 {
265 struct ieee80211_local *local = hw_to_local(hw);
266
267 trace_api_restart_hw(local);
268
269 wiphy_info(hw->wiphy,
270 "Hardware restart was requested\n");
271
272 /* use this reason, ieee80211_reconfig will unblock it */
273 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
274 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
275 false);
276
277 /*
278 * Stop all Rx during the reconfig. We don't want state changes
279 * or driver callbacks while this is in progress.
280 */
281 local->in_reconfig = true;
282 barrier();
283
284 queue_work(system_freezable_wq, &local->restart_work);
285 }
286 EXPORT_SYMBOL(ieee80211_restart_hw);
287
288 #ifdef CONFIG_INET
289 static int ieee80211_ifa_changed(struct notifier_block *nb,
290 unsigned long data, void *arg)
291 {
292 struct in_ifaddr *ifa = arg;
293 struct ieee80211_local *local =
294 container_of(nb, struct ieee80211_local,
295 ifa_notifier);
296 struct net_device *ndev = ifa->ifa_dev->dev;
297 struct wireless_dev *wdev = ndev->ieee80211_ptr;
298 struct in_device *idev;
299 struct ieee80211_sub_if_data *sdata;
300 struct ieee80211_bss_conf *bss_conf;
301 struct ieee80211_if_managed *ifmgd;
302 int c = 0;
303
304 /* Make sure it's our interface that got changed */
305 if (!wdev)
306 return NOTIFY_DONE;
307
308 if (wdev->wiphy != local->hw.wiphy)
309 return NOTIFY_DONE;
310
311 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
312 bss_conf = &sdata->vif.bss_conf;
313
314 /* ARP filtering is only supported in managed mode */
315 if (sdata->vif.type != NL80211_IFTYPE_STATION)
316 return NOTIFY_DONE;
317
318 idev = __in_dev_get_rtnl(sdata->dev);
319 if (!idev)
320 return NOTIFY_DONE;
321
322 ifmgd = &sdata->u.mgd;
323 sdata_lock(sdata);
324
325 /* Copy the addresses to the bss_conf list */
326 ifa = idev->ifa_list;
327 while (ifa) {
328 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
329 bss_conf->arp_addr_list[c] = ifa->ifa_address;
330 ifa = ifa->ifa_next;
331 c++;
332 }
333
334 bss_conf->arp_addr_cnt = c;
335
336 /* Configure driver only if associated (which also implies it is up) */
337 if (ifmgd->associated)
338 ieee80211_bss_info_change_notify(sdata,
339 BSS_CHANGED_ARP_FILTER);
340
341 sdata_unlock(sdata);
342
343 return NOTIFY_OK;
344 }
345 #endif
346
347 #if IS_ENABLED(CONFIG_IPV6)
348 static int ieee80211_ifa6_changed(struct notifier_block *nb,
349 unsigned long data, void *arg)
350 {
351 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
352 struct inet6_dev *idev = ifa->idev;
353 struct net_device *ndev = ifa->idev->dev;
354 struct ieee80211_local *local =
355 container_of(nb, struct ieee80211_local, ifa6_notifier);
356 struct wireless_dev *wdev = ndev->ieee80211_ptr;
357 struct ieee80211_sub_if_data *sdata;
358
359 /* Make sure it's our interface that got changed */
360 if (!wdev || wdev->wiphy != local->hw.wiphy)
361 return NOTIFY_DONE;
362
363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
364
365 /*
366 * For now only support station mode. This is mostly because
367 * doing AP would have to handle AP_VLAN in some way ...
368 */
369 if (sdata->vif.type != NL80211_IFTYPE_STATION)
370 return NOTIFY_DONE;
371
372 drv_ipv6_addr_change(local, sdata, idev);
373
374 return NOTIFY_OK;
375 }
376 #endif
377
378 /* There isn't a lot of sense in it, but you can transmit anything you like */
379 static const struct ieee80211_txrx_stypes
380 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
381 [NL80211_IFTYPE_ADHOC] = {
382 .tx = 0xffff,
383 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
384 BIT(IEEE80211_STYPE_AUTH >> 4) |
385 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
386 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
387 },
388 [NL80211_IFTYPE_STATION] = {
389 .tx = 0xffff,
390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
392 },
393 [NL80211_IFTYPE_AP] = {
394 .tx = 0xffff,
395 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
396 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
398 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
399 BIT(IEEE80211_STYPE_AUTH >> 4) |
400 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
401 BIT(IEEE80211_STYPE_ACTION >> 4),
402 },
403 [NL80211_IFTYPE_AP_VLAN] = {
404 /* copy AP */
405 .tx = 0xffff,
406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
409 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
410 BIT(IEEE80211_STYPE_AUTH >> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412 BIT(IEEE80211_STYPE_ACTION >> 4),
413 },
414 [NL80211_IFTYPE_P2P_CLIENT] = {
415 .tx = 0xffff,
416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418 },
419 [NL80211_IFTYPE_P2P_GO] = {
420 .tx = 0xffff,
421 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
424 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
425 BIT(IEEE80211_STYPE_AUTH >> 4) |
426 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
427 BIT(IEEE80211_STYPE_ACTION >> 4),
428 },
429 [NL80211_IFTYPE_MESH_POINT] = {
430 .tx = 0xffff,
431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4),
434 },
435 [NL80211_IFTYPE_P2P_DEVICE] = {
436 .tx = 0xffff,
437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
439 },
440 };
441
442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
443 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
444 IEEE80211_HT_AMPDU_PARM_DENSITY,
445
446 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
447 IEEE80211_HT_CAP_MAX_AMSDU |
448 IEEE80211_HT_CAP_SGI_20 |
449 IEEE80211_HT_CAP_SGI_40 |
450 IEEE80211_HT_CAP_LDPC_CODING |
451 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
452 .mcs = {
453 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
454 0xff, 0xff, 0xff, 0xff, 0xff, },
455 },
456 };
457
458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
459 .vht_cap_info =
460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
461 IEEE80211_VHT_CAP_SHORT_GI_80 |
462 IEEE80211_VHT_CAP_SHORT_GI_160 |
463 IEEE80211_VHT_CAP_RXSTBC_1 |
464 IEEE80211_VHT_CAP_RXSTBC_2 |
465 IEEE80211_VHT_CAP_RXSTBC_3 |
466 IEEE80211_VHT_CAP_RXSTBC_4 |
467 IEEE80211_VHT_CAP_TXSTBC |
468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
473 .supp_mcs = {
474 .rx_mcs_map = cpu_to_le16(~0),
475 .tx_mcs_map = cpu_to_le16(~0),
476 },
477 };
478
479 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
480 const struct ieee80211_ops *ops,
481 const char *requested_name)
482 {
483 struct ieee80211_local *local;
484 int priv_size, i;
485 struct wiphy *wiphy;
486 bool use_chanctx;
487
488 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
489 !ops->add_interface || !ops->remove_interface ||
490 !ops->configure_filter))
491 return NULL;
492
493 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
494 return NULL;
495
496 /* check all or no channel context operations exist */
497 i = !!ops->add_chanctx + !!ops->remove_chanctx +
498 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
499 !!ops->unassign_vif_chanctx;
500 if (WARN_ON(i != 0 && i != 5))
501 return NULL;
502 use_chanctx = i == 5;
503
504 /* Ensure 32-byte alignment of our private data and hw private data.
505 * We use the wiphy priv data for both our ieee80211_local and for
506 * the driver's private data
507 *
508 * In memory it'll be like this:
509 *
510 * +-------------------------+
511 * | struct wiphy |
512 * +-------------------------+
513 * | struct ieee80211_local |
514 * +-------------------------+
515 * | driver's private data |
516 * +-------------------------+
517 *
518 */
519 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
520
521 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
522
523 if (!wiphy)
524 return NULL;
525
526 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
527
528 wiphy->privid = mac80211_wiphy_privid;
529
530 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
531 WIPHY_FLAG_4ADDR_AP |
532 WIPHY_FLAG_4ADDR_STATION |
533 WIPHY_FLAG_REPORTS_OBSS |
534 WIPHY_FLAG_OFFCHAN_TX;
535
536 if (ops->remain_on_channel)
537 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
538
539 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
540 NL80211_FEATURE_SAE |
541 NL80211_FEATURE_HT_IBSS |
542 NL80211_FEATURE_VIF_TXPOWER |
543 NL80211_FEATURE_MAC_ON_CREATE |
544 NL80211_FEATURE_USERSPACE_MPM;
545
546 if (!ops->hw_scan)
547 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
548 NL80211_FEATURE_AP_SCAN;
549
550
551 if (!ops->set_key)
552 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
553
554 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
555
556 local = wiphy_priv(wiphy);
557
558 if (sta_info_init(local))
559 goto err_free;
560
561 local->hw.wiphy = wiphy;
562
563 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
564
565 local->ops = ops;
566 local->use_chanctx = use_chanctx;
567
568 /* set up some defaults */
569 local->hw.queues = 1;
570 local->hw.max_rates = 1;
571 local->hw.max_report_rates = 0;
572 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
573 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
574 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
575 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
576 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
577 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
578 IEEE80211_RADIOTAP_MCS_HAVE_GI |
579 IEEE80211_RADIOTAP_MCS_HAVE_BW;
580 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
581 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
582 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
583 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
584 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
585 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
586 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
587
588 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
589
590 wiphy->extended_capabilities = local->ext_capa;
591 wiphy->extended_capabilities_mask = local->ext_capa;
592 wiphy->extended_capabilities_len =
593 ARRAY_SIZE(local->ext_capa);
594
595 INIT_LIST_HEAD(&local->interfaces);
596
597 __hw_addr_init(&local->mc_list);
598
599 mutex_init(&local->iflist_mtx);
600 mutex_init(&local->mtx);
601
602 mutex_init(&local->key_mtx);
603 spin_lock_init(&local->filter_lock);
604 spin_lock_init(&local->rx_path_lock);
605 spin_lock_init(&local->queue_stop_reason_lock);
606
607 INIT_LIST_HEAD(&local->chanctx_list);
608 mutex_init(&local->chanctx_mtx);
609
610 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
611
612 INIT_WORK(&local->restart_work, ieee80211_restart_work);
613
614 INIT_WORK(&local->radar_detected_work,
615 ieee80211_dfs_radar_detected_work);
616
617 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
618 local->smps_mode = IEEE80211_SMPS_OFF;
619
620 INIT_WORK(&local->dynamic_ps_enable_work,
621 ieee80211_dynamic_ps_enable_work);
622 INIT_WORK(&local->dynamic_ps_disable_work,
623 ieee80211_dynamic_ps_disable_work);
624 setup_timer(&local->dynamic_ps_timer,
625 ieee80211_dynamic_ps_timer, (unsigned long) local);
626
627 INIT_WORK(&local->sched_scan_stopped_work,
628 ieee80211_sched_scan_stopped_work);
629
630 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
631
632 spin_lock_init(&local->ack_status_lock);
633 idr_init(&local->ack_status_frames);
634
635 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
636 skb_queue_head_init(&local->pending[i]);
637 atomic_set(&local->agg_queue_stop[i], 0);
638 }
639 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
640 (unsigned long)local);
641
642 tasklet_init(&local->tasklet,
643 ieee80211_tasklet_handler,
644 (unsigned long) local);
645
646 skb_queue_head_init(&local->skb_queue);
647 skb_queue_head_init(&local->skb_queue_unreliable);
648 skb_queue_head_init(&local->skb_queue_tdls_chsw);
649
650 ieee80211_alloc_led_names(local);
651
652 ieee80211_roc_setup(local);
653
654 return &local->hw;
655 err_free:
656 wiphy_free(wiphy);
657 return NULL;
658 }
659 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
660
661 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
662 {
663 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
664 IS_ERR(local->wep_rx_tfm));
665 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
666 int n_suites = 0, r = 0, w = 0;
667 u32 *suites;
668 static const u32 cipher_suites[] = {
669 /* keep WEP first, it may be removed below */
670 WLAN_CIPHER_SUITE_WEP40,
671 WLAN_CIPHER_SUITE_WEP104,
672 WLAN_CIPHER_SUITE_TKIP,
673 WLAN_CIPHER_SUITE_CCMP,
674 WLAN_CIPHER_SUITE_CCMP_256,
675 WLAN_CIPHER_SUITE_GCMP,
676 WLAN_CIPHER_SUITE_GCMP_256,
677
678 /* keep last -- depends on hw flags! */
679 WLAN_CIPHER_SUITE_AES_CMAC,
680 WLAN_CIPHER_SUITE_BIP_CMAC_256,
681 WLAN_CIPHER_SUITE_BIP_GMAC_128,
682 WLAN_CIPHER_SUITE_BIP_GMAC_256,
683 };
684
685 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
686 local->hw.wiphy->cipher_suites) {
687 /* If the driver advertises, or doesn't support SW crypto,
688 * we only need to remove WEP if necessary.
689 */
690 if (have_wep)
691 return 0;
692
693 /* well if it has _no_ ciphers ... fine */
694 if (!local->hw.wiphy->n_cipher_suites)
695 return 0;
696
697 /* Driver provides cipher suites, but we need to exclude WEP */
698 suites = kmemdup(local->hw.wiphy->cipher_suites,
699 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
700 GFP_KERNEL);
701 if (!suites)
702 return -ENOMEM;
703
704 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
705 u32 suite = local->hw.wiphy->cipher_suites[r];
706
707 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
708 suite == WLAN_CIPHER_SUITE_WEP104)
709 continue;
710 suites[w++] = suite;
711 }
712 } else if (!local->hw.cipher_schemes) {
713 /* If the driver doesn't have cipher schemes, there's nothing
714 * else to do other than assign the (software supported and
715 * perhaps offloaded) cipher suites.
716 */
717 local->hw.wiphy->cipher_suites = cipher_suites;
718 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
719
720 if (!have_mfp)
721 local->hw.wiphy->n_cipher_suites -= 4;
722
723 if (!have_wep) {
724 local->hw.wiphy->cipher_suites += 2;
725 local->hw.wiphy->n_cipher_suites -= 2;
726 }
727
728 /* not dynamically allocated, so just return */
729 return 0;
730 } else {
731 const struct ieee80211_cipher_scheme *cs;
732
733 cs = local->hw.cipher_schemes;
734
735 /* Driver specifies cipher schemes only (but not cipher suites
736 * including the schemes)
737 *
738 * We start counting ciphers defined by schemes, TKIP, CCMP,
739 * CCMP-256, GCMP, and GCMP-256
740 */
741 n_suites = local->hw.n_cipher_schemes + 5;
742
743 /* check if we have WEP40 and WEP104 */
744 if (have_wep)
745 n_suites += 2;
746
747 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
748 * BIP-GMAC-256
749 */
750 if (have_mfp)
751 n_suites += 4;
752
753 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
754 if (!suites)
755 return -ENOMEM;
756
757 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
758 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
759 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
760 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
761 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
762
763 if (have_wep) {
764 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
765 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
766 }
767
768 if (have_mfp) {
769 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
770 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
771 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
772 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
773 }
774
775 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
776 suites[w++] = cs[r].cipher;
777 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
778 kfree(suites);
779 return -EINVAL;
780 }
781 }
782 }
783
784 local->hw.wiphy->cipher_suites = suites;
785 local->hw.wiphy->n_cipher_suites = w;
786 local->wiphy_ciphers_allocated = true;
787
788 return 0;
789 }
790
791 int ieee80211_register_hw(struct ieee80211_hw *hw)
792 {
793 struct ieee80211_local *local = hw_to_local(hw);
794 int result, i;
795 enum ieee80211_band band;
796 int channels, max_bitrates;
797 bool supp_ht, supp_vht;
798 netdev_features_t feature_whitelist;
799 struct cfg80211_chan_def dflt_chandef = {};
800
801 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
802 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
803 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
804 return -EINVAL;
805
806 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
807 (!local->ops->tdls_channel_switch ||
808 !local->ops->tdls_cancel_channel_switch ||
809 !local->ops->tdls_recv_channel_switch))
810 return -EOPNOTSUPP;
811
812 #ifdef CONFIG_PM
813 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
814 return -EINVAL;
815 #endif
816
817 if (!local->use_chanctx) {
818 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
819 const struct ieee80211_iface_combination *comb;
820
821 comb = &local->hw.wiphy->iface_combinations[i];
822
823 if (comb->num_different_channels > 1)
824 return -EINVAL;
825 }
826 } else {
827 /*
828 * WDS is currently prohibited when channel contexts are used
829 * because there's no clear definition of which channel WDS
830 * type interfaces use
831 */
832 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
833 return -EINVAL;
834
835 /* DFS is not supported with multi-channel combinations yet */
836 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
837 const struct ieee80211_iface_combination *comb;
838
839 comb = &local->hw.wiphy->iface_combinations[i];
840
841 if (comb->radar_detect_widths &&
842 comb->num_different_channels > 1)
843 return -EINVAL;
844 }
845 }
846
847 /* Only HW csum features are currently compatible with mac80211 */
848 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
849 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
850 NETIF_F_GSO_SOFTWARE;
851 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
852 return -EINVAL;
853
854 if (hw->max_report_rates == 0)
855 hw->max_report_rates = hw->max_rates;
856
857 local->rx_chains = 1;
858
859 /*
860 * generic code guarantees at least one band,
861 * set this very early because much code assumes
862 * that hw.conf.channel is assigned
863 */
864 channels = 0;
865 max_bitrates = 0;
866 supp_ht = false;
867 supp_vht = false;
868 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
869 struct ieee80211_supported_band *sband;
870
871 sband = local->hw.wiphy->bands[band];
872 if (!sband)
873 continue;
874
875 if (!dflt_chandef.chan) {
876 cfg80211_chandef_create(&dflt_chandef,
877 &sband->channels[0],
878 NL80211_CHAN_NO_HT);
879 /* init channel we're on */
880 if (!local->use_chanctx && !local->_oper_chandef.chan) {
881 local->hw.conf.chandef = dflt_chandef;
882 local->_oper_chandef = dflt_chandef;
883 }
884 local->monitor_chandef = dflt_chandef;
885 }
886
887 channels += sband->n_channels;
888
889 if (max_bitrates < sband->n_bitrates)
890 max_bitrates = sband->n_bitrates;
891 supp_ht = supp_ht || sband->ht_cap.ht_supported;
892 supp_vht = supp_vht || sband->vht_cap.vht_supported;
893
894 if (sband->ht_cap.ht_supported)
895 local->rx_chains =
896 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
897 local->rx_chains);
898
899 /* TODO: consider VHT for RX chains, hopefully it's the same */
900 }
901
902 /* if low-level driver supports AP, we also support VLAN */
903 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
904 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
905 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
906 }
907
908 /* mac80211 always supports monitor */
909 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
910 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
911
912 /* mac80211 doesn't support more than one IBSS interface right now */
913 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
914 const struct ieee80211_iface_combination *c;
915 int j;
916
917 c = &hw->wiphy->iface_combinations[i];
918
919 for (j = 0; j < c->n_limits; j++)
920 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
921 c->limits[j].max > 1)
922 return -EINVAL;
923 }
924
925 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
926 sizeof(void *) * channels, GFP_KERNEL);
927 if (!local->int_scan_req)
928 return -ENOMEM;
929
930 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
931 if (!local->hw.wiphy->bands[band])
932 continue;
933 local->int_scan_req->rates[band] = (u32) -1;
934 }
935
936 #ifndef CONFIG_MAC80211_MESH
937 /* mesh depends on Kconfig, but drivers should set it if they want */
938 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
939 #endif
940
941 /* if the underlying driver supports mesh, mac80211 will (at least)
942 * provide routing of mesh authentication frames to userspace */
943 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
944 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
945
946 /* mac80211 supports control port protocol changing */
947 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
948
949 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
950 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
951 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
952 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
953 if (hw->max_signal <= 0) {
954 result = -EINVAL;
955 goto fail_wiphy_register;
956 }
957 }
958
959 /*
960 * Calculate scan IE length -- we need this to alloc
961 * memory and to subtract from the driver limit. It
962 * includes the DS Params, (extended) supported rates, and HT
963 * information -- SSID is the driver's responsibility.
964 */
965 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
966 3 /* DS Params */;
967 if (supp_ht)
968 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
969
970 if (supp_vht)
971 local->scan_ies_len +=
972 2 + sizeof(struct ieee80211_vht_cap);
973
974 if (!local->ops->hw_scan) {
975 /* For hw_scan, driver needs to set these up. */
976 local->hw.wiphy->max_scan_ssids = 4;
977 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
978 }
979
980 /*
981 * If the driver supports any scan IEs, then assume the
982 * limit includes the IEs mac80211 will add, otherwise
983 * leave it at zero and let the driver sort it out; we
984 * still pass our IEs to the driver but userspace will
985 * not be allowed to in that case.
986 */
987 if (local->hw.wiphy->max_scan_ie_len)
988 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
989
990 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
991 local->hw.n_cipher_schemes));
992
993 result = ieee80211_init_cipher_suites(local);
994 if (result < 0)
995 goto fail_wiphy_register;
996
997 if (!local->ops->remain_on_channel)
998 local->hw.wiphy->max_remain_on_channel_duration = 5000;
999
1000 /* mac80211 based drivers don't support internal TDLS setup */
1001 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1002 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1003
1004 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1005 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1006 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1007
1008 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1009
1010 result = wiphy_register(local->hw.wiphy);
1011 if (result < 0)
1012 goto fail_wiphy_register;
1013
1014 /*
1015 * We use the number of queues for feature tests (QoS, HT) internally
1016 * so restrict them appropriately.
1017 */
1018 if (hw->queues > IEEE80211_MAX_QUEUES)
1019 hw->queues = IEEE80211_MAX_QUEUES;
1020
1021 local->workqueue =
1022 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1023 if (!local->workqueue) {
1024 result = -ENOMEM;
1025 goto fail_workqueue;
1026 }
1027
1028 /*
1029 * The hardware needs headroom for sending the frame,
1030 * and we need some headroom for passing the frame to monitor
1031 * interfaces, but never both at the same time.
1032 */
1033 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1034 IEEE80211_TX_STATUS_HEADROOM);
1035
1036 debugfs_hw_add(local);
1037
1038 /*
1039 * if the driver doesn't specify a max listen interval we
1040 * use 5 which should be a safe default
1041 */
1042 if (local->hw.max_listen_interval == 0)
1043 local->hw.max_listen_interval = 5;
1044
1045 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1046
1047 local->dynamic_ps_forced_timeout = -1;
1048
1049 if (!local->hw.txq_ac_max_pending)
1050 local->hw.txq_ac_max_pending = 64;
1051
1052 result = ieee80211_wep_init(local);
1053 if (result < 0)
1054 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1055 result);
1056
1057 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1058
1059 ieee80211_led_init(local);
1060
1061 rtnl_lock();
1062
1063 result = ieee80211_init_rate_ctrl_alg(local,
1064 hw->rate_control_algorithm);
1065 if (result < 0) {
1066 wiphy_debug(local->hw.wiphy,
1067 "Failed to initialize rate control algorithm\n");
1068 goto fail_rate;
1069 }
1070
1071 /* add one default STA interface if supported */
1072 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1073 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1074 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1075 NL80211_IFTYPE_STATION, NULL);
1076 if (result)
1077 wiphy_warn(local->hw.wiphy,
1078 "Failed to add default virtual iface\n");
1079 }
1080
1081 rtnl_unlock();
1082
1083 #ifdef CONFIG_INET
1084 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1085 result = register_inetaddr_notifier(&local->ifa_notifier);
1086 if (result)
1087 goto fail_ifa;
1088 #endif
1089
1090 #if IS_ENABLED(CONFIG_IPV6)
1091 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1092 result = register_inet6addr_notifier(&local->ifa6_notifier);
1093 if (result)
1094 goto fail_ifa6;
1095 #endif
1096
1097 return 0;
1098
1099 #if IS_ENABLED(CONFIG_IPV6)
1100 fail_ifa6:
1101 #ifdef CONFIG_INET
1102 unregister_inetaddr_notifier(&local->ifa_notifier);
1103 #endif
1104 #endif
1105 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1106 fail_ifa:
1107 #endif
1108 rtnl_lock();
1109 rate_control_deinitialize(local);
1110 ieee80211_remove_interfaces(local);
1111 fail_rate:
1112 rtnl_unlock();
1113 ieee80211_led_exit(local);
1114 ieee80211_wep_free(local);
1115 destroy_workqueue(local->workqueue);
1116 fail_workqueue:
1117 wiphy_unregister(local->hw.wiphy);
1118 fail_wiphy_register:
1119 if (local->wiphy_ciphers_allocated)
1120 kfree(local->hw.wiphy->cipher_suites);
1121 kfree(local->int_scan_req);
1122 return result;
1123 }
1124 EXPORT_SYMBOL(ieee80211_register_hw);
1125
1126 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1127 {
1128 struct ieee80211_local *local = hw_to_local(hw);
1129
1130 tasklet_kill(&local->tx_pending_tasklet);
1131 tasklet_kill(&local->tasklet);
1132
1133 #ifdef CONFIG_INET
1134 unregister_inetaddr_notifier(&local->ifa_notifier);
1135 #endif
1136 #if IS_ENABLED(CONFIG_IPV6)
1137 unregister_inet6addr_notifier(&local->ifa6_notifier);
1138 #endif
1139
1140 rtnl_lock();
1141
1142 /*
1143 * At this point, interface list manipulations are fine
1144 * because the driver cannot be handing us frames any
1145 * more and the tasklet is killed.
1146 */
1147 ieee80211_remove_interfaces(local);
1148
1149 rtnl_unlock();
1150
1151 cancel_work_sync(&local->restart_work);
1152 cancel_work_sync(&local->reconfig_filter);
1153 cancel_work_sync(&local->tdls_chsw_work);
1154 flush_work(&local->sched_scan_stopped_work);
1155
1156 ieee80211_clear_tx_pending(local);
1157 rate_control_deinitialize(local);
1158
1159 if (skb_queue_len(&local->skb_queue) ||
1160 skb_queue_len(&local->skb_queue_unreliable))
1161 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1162 skb_queue_purge(&local->skb_queue);
1163 skb_queue_purge(&local->skb_queue_unreliable);
1164 skb_queue_purge(&local->skb_queue_tdls_chsw);
1165
1166 destroy_workqueue(local->workqueue);
1167 wiphy_unregister(local->hw.wiphy);
1168 ieee80211_wep_free(local);
1169 ieee80211_led_exit(local);
1170 kfree(local->int_scan_req);
1171 }
1172 EXPORT_SYMBOL(ieee80211_unregister_hw);
1173
1174 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1175 {
1176 WARN_ONCE(1, "Have pending ack frames!\n");
1177 kfree_skb(p);
1178 return 0;
1179 }
1180
1181 void ieee80211_free_hw(struct ieee80211_hw *hw)
1182 {
1183 struct ieee80211_local *local = hw_to_local(hw);
1184
1185 mutex_destroy(&local->iflist_mtx);
1186 mutex_destroy(&local->mtx);
1187
1188 if (local->wiphy_ciphers_allocated)
1189 kfree(local->hw.wiphy->cipher_suites);
1190
1191 idr_for_each(&local->ack_status_frames,
1192 ieee80211_free_ack_frame, NULL);
1193 idr_destroy(&local->ack_status_frames);
1194
1195 sta_info_stop(local);
1196
1197 ieee80211_free_led_names(local);
1198
1199 wiphy_free(local->hw.wiphy);
1200 }
1201 EXPORT_SYMBOL(ieee80211_free_hw);
1202
1203 static int __init ieee80211_init(void)
1204 {
1205 struct sk_buff *skb;
1206 int ret;
1207
1208 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1209 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1210 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1211
1212 ret = rc80211_minstrel_init();
1213 if (ret)
1214 return ret;
1215
1216 ret = rc80211_minstrel_ht_init();
1217 if (ret)
1218 goto err_minstrel;
1219
1220 ret = ieee80211_iface_init();
1221 if (ret)
1222 goto err_netdev;
1223
1224 return 0;
1225 err_netdev:
1226 rc80211_minstrel_ht_exit();
1227 err_minstrel:
1228 rc80211_minstrel_exit();
1229
1230 return ret;
1231 }
1232
1233 static void __exit ieee80211_exit(void)
1234 {
1235 rc80211_minstrel_ht_exit();
1236 rc80211_minstrel_exit();
1237
1238 ieee80211s_stop();
1239
1240 ieee80211_iface_exit();
1241
1242 rcu_barrier();
1243 }
1244
1245
1246 subsys_initcall(ieee80211_init);
1247 module_exit(ieee80211_exit);
1248
1249 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1250 MODULE_LICENSE("GPL");
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