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Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
[linux-2.6/btrfs-unstable.git] / net / mac80211 / main.c
blobfb1b1f9e7e5e03281fabe79175c62f3817354d0d
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 flush_work(&local->sched_scan_stopped_work);
252
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
255
256 flush_work(&local->radar_detected_work);
257 rtnl_lock();
258 list_for_each_entry(sdata, &local->interfaces, list)
259 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
260 ieee80211_scan_cancel(local);
261
262 /* make sure any new ROC will consider local->in_reconfig */
263 flush_delayed_work(&local->roc_work);
264 flush_work(&local->hw_roc_done);
265
266 /* wait for all packet processing to be done */
267 synchronize_net();
268
269 ieee80211_reconfig(local);
270 rtnl_unlock();
271 }
272
273 void ieee80211_restart_hw(struct ieee80211_hw *hw)
274 {
275 struct ieee80211_local *local = hw_to_local(hw);
276
277 trace_api_restart_hw(local);
278
279 wiphy_info(hw->wiphy,
280 "Hardware restart was requested\n");
281
282 /* use this reason, ieee80211_reconfig will unblock it */
283 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
284 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
285 false);
286
287 /*
288 * Stop all Rx during the reconfig. We don't want state changes
289 * or driver callbacks while this is in progress.
290 */
291 local->in_reconfig = true;
292 barrier();
293
294 queue_work(system_freezable_wq, &local->restart_work);
295 }
296 EXPORT_SYMBOL(ieee80211_restart_hw);
297
298 #ifdef CONFIG_INET
299 static int ieee80211_ifa_changed(struct notifier_block *nb,
300 unsigned long data, void *arg)
301 {
302 struct in_ifaddr *ifa = arg;
303 struct ieee80211_local *local =
304 container_of(nb, struct ieee80211_local,
305 ifa_notifier);
306 struct net_device *ndev = ifa->ifa_dev->dev;
307 struct wireless_dev *wdev = ndev->ieee80211_ptr;
308 struct in_device *idev;
309 struct ieee80211_sub_if_data *sdata;
310 struct ieee80211_bss_conf *bss_conf;
311 struct ieee80211_if_managed *ifmgd;
312 int c = 0;
313
314 /* Make sure it's our interface that got changed */
315 if (!wdev)
316 return NOTIFY_DONE;
317
318 if (wdev->wiphy != local->hw.wiphy)
319 return NOTIFY_DONE;
320
321 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
322 bss_conf = &sdata->vif.bss_conf;
323
324 /* ARP filtering is only supported in managed mode */
325 if (sdata->vif.type != NL80211_IFTYPE_STATION)
326 return NOTIFY_DONE;
327
328 idev = __in_dev_get_rtnl(sdata->dev);
329 if (!idev)
330 return NOTIFY_DONE;
331
332 ifmgd = &sdata->u.mgd;
333 sdata_lock(sdata);
334
335 /* Copy the addresses to the bss_conf list */
336 ifa = idev->ifa_list;
337 while (ifa) {
338 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
339 bss_conf->arp_addr_list[c] = ifa->ifa_address;
340 ifa = ifa->ifa_next;
341 c++;
342 }
343
344 bss_conf->arp_addr_cnt = c;
345
346 /* Configure driver only if associated (which also implies it is up) */
347 if (ifmgd->associated)
348 ieee80211_bss_info_change_notify(sdata,
349 BSS_CHANGED_ARP_FILTER);
350
351 sdata_unlock(sdata);
352
353 return NOTIFY_OK;
354 }
355 #endif
356
357 #if IS_ENABLED(CONFIG_IPV6)
358 static int ieee80211_ifa6_changed(struct notifier_block *nb,
359 unsigned long data, void *arg)
360 {
361 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
362 struct inet6_dev *idev = ifa->idev;
363 struct net_device *ndev = ifa->idev->dev;
364 struct ieee80211_local *local =
365 container_of(nb, struct ieee80211_local, ifa6_notifier);
366 struct wireless_dev *wdev = ndev->ieee80211_ptr;
367 struct ieee80211_sub_if_data *sdata;
368
369 /* Make sure it's our interface that got changed */
370 if (!wdev || wdev->wiphy != local->hw.wiphy)
371 return NOTIFY_DONE;
372
373 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
374
375 /*
376 * For now only support station mode. This is mostly because
377 * doing AP would have to handle AP_VLAN in some way ...
378 */
379 if (sdata->vif.type != NL80211_IFTYPE_STATION)
380 return NOTIFY_DONE;
381
382 drv_ipv6_addr_change(local, sdata, idev);
383
384 return NOTIFY_OK;
385 }
386 #endif
387
388 /* There isn't a lot of sense in it, but you can transmit anything you like */
389 static const struct ieee80211_txrx_stypes
390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
391 [NL80211_IFTYPE_ADHOC] = {
392 .tx = 0xffff,
393 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
394 BIT(IEEE80211_STYPE_AUTH >> 4) |
395 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
397 },
398 [NL80211_IFTYPE_STATION] = {
399 .tx = 0xffff,
400 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
401 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
402 },
403 [NL80211_IFTYPE_AP] = {
404 .tx = 0xffff,
405 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
406 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
408 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
409 BIT(IEEE80211_STYPE_AUTH >> 4) |
410 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
411 BIT(IEEE80211_STYPE_ACTION >> 4),
412 },
413 [NL80211_IFTYPE_AP_VLAN] = {
414 /* copy AP */
415 .tx = 0xffff,
416 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
417 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
419 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
420 BIT(IEEE80211_STYPE_AUTH >> 4) |
421 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
422 BIT(IEEE80211_STYPE_ACTION >> 4),
423 },
424 [NL80211_IFTYPE_P2P_CLIENT] = {
425 .tx = 0xffff,
426 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
428 },
429 [NL80211_IFTYPE_P2P_GO] = {
430 .tx = 0xffff,
431 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
432 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
433 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
434 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
435 BIT(IEEE80211_STYPE_AUTH >> 4) |
436 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
437 BIT(IEEE80211_STYPE_ACTION >> 4),
438 },
439 [NL80211_IFTYPE_MESH_POINT] = {
440 .tx = 0xffff,
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
442 BIT(IEEE80211_STYPE_AUTH >> 4) |
443 BIT(IEEE80211_STYPE_DEAUTH >> 4),
444 },
445 [NL80211_IFTYPE_P2P_DEVICE] = {
446 .tx = 0xffff,
447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
449 },
450 };
451
452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
453 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
454 IEEE80211_HT_AMPDU_PARM_DENSITY,
455
456 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
457 IEEE80211_HT_CAP_MAX_AMSDU |
458 IEEE80211_HT_CAP_SGI_20 |
459 IEEE80211_HT_CAP_SGI_40 |
460 IEEE80211_HT_CAP_LDPC_CODING |
461 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
462 .mcs = {
463 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
464 0xff, 0xff, 0xff, 0xff, 0xff, },
465 },
466 };
467
468 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
469 .vht_cap_info =
470 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
471 IEEE80211_VHT_CAP_SHORT_GI_80 |
472 IEEE80211_VHT_CAP_SHORT_GI_160 |
473 IEEE80211_VHT_CAP_RXSTBC_1 |
474 IEEE80211_VHT_CAP_RXSTBC_2 |
475 IEEE80211_VHT_CAP_RXSTBC_3 |
476 IEEE80211_VHT_CAP_RXSTBC_4 |
477 IEEE80211_VHT_CAP_TXSTBC |
478 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
479 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
480 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
481 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
482 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
483 .supp_mcs = {
484 .rx_mcs_map = cpu_to_le16(~0),
485 .tx_mcs_map = cpu_to_le16(~0),
486 },
487 };
488
489 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
490 const struct ieee80211_ops *ops,
491 const char *requested_name)
492 {
493 struct ieee80211_local *local;
494 int priv_size, i;
495 struct wiphy *wiphy;
496 bool use_chanctx;
497
498 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
499 !ops->add_interface || !ops->remove_interface ||
500 !ops->configure_filter))
501 return NULL;
502
503 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
504 return NULL;
505
506 /* check all or no channel context operations exist */
507 i = !!ops->add_chanctx + !!ops->remove_chanctx +
508 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
509 !!ops->unassign_vif_chanctx;
510 if (WARN_ON(i != 0 && i != 5))
511 return NULL;
512 use_chanctx = i == 5;
513
514 /* Ensure 32-byte alignment of our private data and hw private data.
515 * We use the wiphy priv data for both our ieee80211_local and for
516 * the driver's private data
517 *
518 * In memory it'll be like this:
519 *
520 * +-------------------------+
521 * | struct wiphy |
522 * +-------------------------+
523 * | struct ieee80211_local |
524 * +-------------------------+
525 * | driver's private data |
526 * +-------------------------+
527 *
528 */
529 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
530
531 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
532
533 if (!wiphy)
534 return NULL;
535
536 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
537
538 wiphy->privid = mac80211_wiphy_privid;
539
540 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
541 WIPHY_FLAG_4ADDR_AP |
542 WIPHY_FLAG_4ADDR_STATION |
543 WIPHY_FLAG_REPORTS_OBSS |
544 WIPHY_FLAG_OFFCHAN_TX;
545
546 if (ops->remain_on_channel)
547 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
548
549 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
550 NL80211_FEATURE_SAE |
551 NL80211_FEATURE_HT_IBSS |
552 NL80211_FEATURE_VIF_TXPOWER |
553 NL80211_FEATURE_MAC_ON_CREATE |
554 NL80211_FEATURE_USERSPACE_MPM |
555 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
556 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
557 wiphy_ext_feature_set(wiphy,
558 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
559
560 if (!ops->hw_scan)
561 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
562 NL80211_FEATURE_AP_SCAN;
563
564
565 if (!ops->set_key)
566 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
567
568 if (ops->wake_tx_queue)
569 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
570
571 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
572
573 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
574
575 local = wiphy_priv(wiphy);
576
577 if (sta_info_init(local))
578 goto err_free;
579
580 local->hw.wiphy = wiphy;
581
582 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
583
584 local->ops = ops;
585 local->use_chanctx = use_chanctx;
586
587 /* set up some defaults */
588 local->hw.queues = 1;
589 local->hw.max_rates = 1;
590 local->hw.max_report_rates = 0;
591 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
592 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
593 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
594 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
595 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
596 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
597 IEEE80211_RADIOTAP_MCS_HAVE_GI |
598 IEEE80211_RADIOTAP_MCS_HAVE_BW;
599 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
600 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
601 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
602 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
603 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
604 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
605 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
606
607 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
608
609 wiphy->extended_capabilities = local->ext_capa;
610 wiphy->extended_capabilities_mask = local->ext_capa;
611 wiphy->extended_capabilities_len =
612 ARRAY_SIZE(local->ext_capa);
613
614 INIT_LIST_HEAD(&local->interfaces);
615 INIT_LIST_HEAD(&local->mon_list);
616
617 __hw_addr_init(&local->mc_list);
618
619 mutex_init(&local->iflist_mtx);
620 mutex_init(&local->mtx);
621
622 mutex_init(&local->key_mtx);
623 spin_lock_init(&local->filter_lock);
624 spin_lock_init(&local->rx_path_lock);
625 spin_lock_init(&local->queue_stop_reason_lock);
626
627 INIT_LIST_HEAD(&local->chanctx_list);
628 mutex_init(&local->chanctx_mtx);
629
630 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
631
632 INIT_WORK(&local->restart_work, ieee80211_restart_work);
633
634 INIT_WORK(&local->radar_detected_work,
635 ieee80211_dfs_radar_detected_work);
636
637 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
638 local->smps_mode = IEEE80211_SMPS_OFF;
639
640 INIT_WORK(&local->dynamic_ps_enable_work,
641 ieee80211_dynamic_ps_enable_work);
642 INIT_WORK(&local->dynamic_ps_disable_work,
643 ieee80211_dynamic_ps_disable_work);
644 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
645
646 INIT_WORK(&local->sched_scan_stopped_work,
647 ieee80211_sched_scan_stopped_work);
648
649 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
650
651 spin_lock_init(&local->ack_status_lock);
652 idr_init(&local->ack_status_frames);
653
654 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
655 skb_queue_head_init(&local->pending[i]);
656 atomic_set(&local->agg_queue_stop[i], 0);
657 }
658 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
659 (unsigned long)local);
660
661 tasklet_init(&local->tasklet,
662 ieee80211_tasklet_handler,
663 (unsigned long) local);
664
665 skb_queue_head_init(&local->skb_queue);
666 skb_queue_head_init(&local->skb_queue_unreliable);
667 skb_queue_head_init(&local->skb_queue_tdls_chsw);
668
669 ieee80211_alloc_led_names(local);
670
671 ieee80211_roc_setup(local);
672
673 local->hw.radiotap_timestamp.units_pos = -1;
674 local->hw.radiotap_timestamp.accuracy = -1;
675
676 return &local->hw;
677 err_free:
678 wiphy_free(wiphy);
679 return NULL;
680 }
681 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
682
683 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
684 {
685 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
686 IS_ERR(local->wep_rx_tfm));
687 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
688 int n_suites = 0, r = 0, w = 0;
689 u32 *suites;
690 static const u32 cipher_suites[] = {
691 /* keep WEP first, it may be removed below */
692 WLAN_CIPHER_SUITE_WEP40,
693 WLAN_CIPHER_SUITE_WEP104,
694 WLAN_CIPHER_SUITE_TKIP,
695 WLAN_CIPHER_SUITE_CCMP,
696 WLAN_CIPHER_SUITE_CCMP_256,
697 WLAN_CIPHER_SUITE_GCMP,
698 WLAN_CIPHER_SUITE_GCMP_256,
699
700 /* keep last -- depends on hw flags! */
701 WLAN_CIPHER_SUITE_AES_CMAC,
702 WLAN_CIPHER_SUITE_BIP_CMAC_256,
703 WLAN_CIPHER_SUITE_BIP_GMAC_128,
704 WLAN_CIPHER_SUITE_BIP_GMAC_256,
705 };
706
707 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
708 local->hw.wiphy->cipher_suites) {
709 /* If the driver advertises, or doesn't support SW crypto,
710 * we only need to remove WEP if necessary.
711 */
712 if (have_wep)
713 return 0;
714
715 /* well if it has _no_ ciphers ... fine */
716 if (!local->hw.wiphy->n_cipher_suites)
717 return 0;
718
719 /* Driver provides cipher suites, but we need to exclude WEP */
720 suites = kmemdup(local->hw.wiphy->cipher_suites,
721 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
722 GFP_KERNEL);
723 if (!suites)
724 return -ENOMEM;
725
726 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
727 u32 suite = local->hw.wiphy->cipher_suites[r];
728
729 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
730 suite == WLAN_CIPHER_SUITE_WEP104)
731 continue;
732 suites[w++] = suite;
733 }
734 } else if (!local->hw.cipher_schemes) {
735 /* If the driver doesn't have cipher schemes, there's nothing
736 * else to do other than assign the (software supported and
737 * perhaps offloaded) cipher suites.
738 */
739 local->hw.wiphy->cipher_suites = cipher_suites;
740 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
741
742 if (!have_mfp)
743 local->hw.wiphy->n_cipher_suites -= 4;
744
745 if (!have_wep) {
746 local->hw.wiphy->cipher_suites += 2;
747 local->hw.wiphy->n_cipher_suites -= 2;
748 }
749
750 /* not dynamically allocated, so just return */
751 return 0;
752 } else {
753 const struct ieee80211_cipher_scheme *cs;
754
755 cs = local->hw.cipher_schemes;
756
757 /* Driver specifies cipher schemes only (but not cipher suites
758 * including the schemes)
759 *
760 * We start counting ciphers defined by schemes, TKIP, CCMP,
761 * CCMP-256, GCMP, and GCMP-256
762 */
763 n_suites = local->hw.n_cipher_schemes + 5;
764
765 /* check if we have WEP40 and WEP104 */
766 if (have_wep)
767 n_suites += 2;
768
769 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
770 * BIP-GMAC-256
771 */
772 if (have_mfp)
773 n_suites += 4;
774
775 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
776 if (!suites)
777 return -ENOMEM;
778
779 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
780 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
781 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
782 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
783 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
784
785 if (have_wep) {
786 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
787 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
788 }
789
790 if (have_mfp) {
791 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
792 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
793 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
794 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
795 }
796
797 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
798 suites[w++] = cs[r].cipher;
799 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
800 kfree(suites);
801 return -EINVAL;
802 }
803 }
804 }
805
806 local->hw.wiphy->cipher_suites = suites;
807 local->hw.wiphy->n_cipher_suites = w;
808 local->wiphy_ciphers_allocated = true;
809
810 return 0;
811 }
812
813 int ieee80211_register_hw(struct ieee80211_hw *hw)
814 {
815 struct ieee80211_local *local = hw_to_local(hw);
816 int result, i;
817 enum nl80211_band band;
818 int channels, max_bitrates;
819 bool supp_ht, supp_vht;
820 netdev_features_t feature_whitelist;
821 struct cfg80211_chan_def dflt_chandef = {};
822
823 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
824 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
825 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
826 return -EINVAL;
827
828 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
829 (!local->ops->tdls_channel_switch ||
830 !local->ops->tdls_cancel_channel_switch ||
831 !local->ops->tdls_recv_channel_switch))
832 return -EOPNOTSUPP;
833
834 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
835 !local->ops->set_frag_threshold))
836 return -EINVAL;
837
838 if (WARN_ON(local->hw.wiphy->interface_modes &
839 BIT(NL80211_IFTYPE_NAN) &&
840 (!local->ops->start_nan || !local->ops->stop_nan)))
841 return -EINVAL;
842
843 #ifdef CONFIG_PM
844 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
845 return -EINVAL;
846 #endif
847
848 if (!local->use_chanctx) {
849 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
850 const struct ieee80211_iface_combination *comb;
851
852 comb = &local->hw.wiphy->iface_combinations[i];
853
854 if (comb->num_different_channels > 1)
855 return -EINVAL;
856 }
857 } else {
858 /*
859 * WDS is currently prohibited when channel contexts are used
860 * because there's no clear definition of which channel WDS
861 * type interfaces use
862 */
863 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
864 return -EINVAL;
865
866 /* DFS is not supported with multi-channel combinations yet */
867 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
868 const struct ieee80211_iface_combination *comb;
869
870 comb = &local->hw.wiphy->iface_combinations[i];
871
872 if (comb->radar_detect_widths &&
873 comb->num_different_channels > 1)
874 return -EINVAL;
875 }
876 }
877
878 /* Only HW csum features are currently compatible with mac80211 */
879 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
880 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
881 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
882 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
883 return -EINVAL;
884
885 if (hw->max_report_rates == 0)
886 hw->max_report_rates = hw->max_rates;
887
888 local->rx_chains = 1;
889
890 /*
891 * generic code guarantees at least one band,
892 * set this very early because much code assumes
893 * that hw.conf.channel is assigned
894 */
895 channels = 0;
896 max_bitrates = 0;
897 supp_ht = false;
898 supp_vht = false;
899 for (band = 0; band < NUM_NL80211_BANDS; band++) {
900 struct ieee80211_supported_band *sband;
901
902 sband = local->hw.wiphy->bands[band];
903 if (!sband)
904 continue;
905
906 if (!dflt_chandef.chan) {
907 cfg80211_chandef_create(&dflt_chandef,
908 &sband->channels[0],
909 NL80211_CHAN_NO_HT);
910 /* init channel we're on */
911 if (!local->use_chanctx && !local->_oper_chandef.chan) {
912 local->hw.conf.chandef = dflt_chandef;
913 local->_oper_chandef = dflt_chandef;
914 }
915 local->monitor_chandef = dflt_chandef;
916 }
917
918 channels += sband->n_channels;
919
920 if (max_bitrates < sband->n_bitrates)
921 max_bitrates = sband->n_bitrates;
922 supp_ht = supp_ht || sband->ht_cap.ht_supported;
923 supp_vht = supp_vht || sband->vht_cap.vht_supported;
924
925 if (!sband->ht_cap.ht_supported)
926 continue;
927
928 /* TODO: consider VHT for RX chains, hopefully it's the same */
929 local->rx_chains =
930 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
931 local->rx_chains);
932
933 /* no need to mask, SM_PS_DISABLED has all bits set */
934 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
935 IEEE80211_HT_CAP_SM_PS_SHIFT;
936 }
937
938 /* if low-level driver supports AP, we also support VLAN.
939 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
940 * based on their support to transmit SW encrypted packets.
941 */
942 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
943 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
944 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
945 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
946 }
947
948 /* mac80211 always supports monitor */
949 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
950 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
951
952 /* mac80211 doesn't support more than one IBSS interface right now */
953 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
954 const struct ieee80211_iface_combination *c;
955 int j;
956
957 c = &hw->wiphy->iface_combinations[i];
958
959 for (j = 0; j < c->n_limits; j++)
960 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
961 c->limits[j].max > 1)
962 return -EINVAL;
963 }
964
965 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
966 sizeof(void *) * channels, GFP_KERNEL);
967 if (!local->int_scan_req)
968 return -ENOMEM;
969
970 for (band = 0; band < NUM_NL80211_BANDS; band++) {
971 if (!local->hw.wiphy->bands[band])
972 continue;
973 local->int_scan_req->rates[band] = (u32) -1;
974 }
975
976 #ifndef CONFIG_MAC80211_MESH
977 /* mesh depends on Kconfig, but drivers should set it if they want */
978 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
979 #endif
980
981 /* if the underlying driver supports mesh, mac80211 will (at least)
982 * provide routing of mesh authentication frames to userspace */
983 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
984 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
985
986 /* mac80211 supports control port protocol changing */
987 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
988
989 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
990 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
991 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
992 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
993 if (hw->max_signal <= 0) {
994 result = -EINVAL;
995 goto fail_wiphy_register;
996 }
997 }
998
999 /*
1000 * Calculate scan IE length -- we need this to alloc
1001 * memory and to subtract from the driver limit. It
1002 * includes the DS Params, (extended) supported rates, and HT
1003 * information -- SSID is the driver's responsibility.
1004 */
1005 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1006 3 /* DS Params */;
1007 if (supp_ht)
1008 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1009
1010 if (supp_vht)
1011 local->scan_ies_len +=
1012 2 + sizeof(struct ieee80211_vht_cap);
1013
1014 if (!local->ops->hw_scan) {
1015 /* For hw_scan, driver needs to set these up. */
1016 local->hw.wiphy->max_scan_ssids = 4;
1017 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1018 }
1019
1020 /*
1021 * If the driver supports any scan IEs, then assume the
1022 * limit includes the IEs mac80211 will add, otherwise
1023 * leave it at zero and let the driver sort it out; we
1024 * still pass our IEs to the driver but userspace will
1025 * not be allowed to in that case.
1026 */
1027 if (local->hw.wiphy->max_scan_ie_len)
1028 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1029
1030 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1031 local->hw.n_cipher_schemes));
1032
1033 result = ieee80211_init_cipher_suites(local);
1034 if (result < 0)
1035 goto fail_wiphy_register;
1036
1037 if (!local->ops->remain_on_channel)
1038 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1039
1040 /* mac80211 based drivers don't support internal TDLS setup */
1041 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1042 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1043
1044 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1045 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1046 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1047
1048 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1049
1050 result = wiphy_register(local->hw.wiphy);
1051 if (result < 0)
1052 goto fail_wiphy_register;
1053
1054 /*
1055 * We use the number of queues for feature tests (QoS, HT) internally
1056 * so restrict them appropriately.
1057 */
1058 if (hw->queues > IEEE80211_MAX_QUEUES)
1059 hw->queues = IEEE80211_MAX_QUEUES;
1060
1061 local->workqueue =
1062 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1063 if (!local->workqueue) {
1064 result = -ENOMEM;
1065 goto fail_workqueue;
1066 }
1067
1068 /*
1069 * The hardware needs headroom for sending the frame,
1070 * and we need some headroom for passing the frame to monitor
1071 * interfaces, but never both at the same time.
1072 */
1073 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1074 IEEE80211_TX_STATUS_HEADROOM);
1075
1076 debugfs_hw_add(local);
1077
1078 /*
1079 * if the driver doesn't specify a max listen interval we
1080 * use 5 which should be a safe default
1081 */
1082 if (local->hw.max_listen_interval == 0)
1083 local->hw.max_listen_interval = 5;
1084
1085 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1086
1087 local->dynamic_ps_forced_timeout = -1;
1088
1089 if (!local->hw.max_nan_de_entries)
1090 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1091
1092 result = ieee80211_wep_init(local);
1093 if (result < 0)
1094 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1095 result);
1096
1097 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1098
1099 ieee80211_led_init(local);
1100
1101 rtnl_lock();
1102
1103 result = ieee80211_init_rate_ctrl_alg(local,
1104 hw->rate_control_algorithm);
1105 if (result < 0) {
1106 wiphy_debug(local->hw.wiphy,
1107 "Failed to initialize rate control algorithm\n");
1108 goto fail_rate;
1109 }
1110
1111 /* add one default STA interface if supported */
1112 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1113 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1114 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1115 NL80211_IFTYPE_STATION, NULL);
1116 if (result)
1117 wiphy_warn(local->hw.wiphy,
1118 "Failed to add default virtual iface\n");
1119 }
1120
1121 rtnl_unlock();
1122
1123 result = ieee80211_txq_setup_flows(local);
1124 if (result)
1125 goto fail_flows;
1126
1127 #ifdef CONFIG_INET
1128 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1129 result = register_inetaddr_notifier(&local->ifa_notifier);
1130 if (result)
1131 goto fail_ifa;
1132 #endif
1133
1134 #if IS_ENABLED(CONFIG_IPV6)
1135 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1136 result = register_inet6addr_notifier(&local->ifa6_notifier);
1137 if (result)
1138 goto fail_ifa6;
1139 #endif
1140
1141 return 0;
1142
1143 #if IS_ENABLED(CONFIG_IPV6)
1144 fail_ifa6:
1145 #ifdef CONFIG_INET
1146 unregister_inetaddr_notifier(&local->ifa_notifier);
1147 #endif
1148 #endif
1149 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1150 fail_ifa:
1151 #endif
1152 ieee80211_txq_teardown_flows(local);
1153 fail_flows:
1154 rtnl_lock();
1155 rate_control_deinitialize(local);
1156 ieee80211_remove_interfaces(local);
1157 fail_rate:
1158 rtnl_unlock();
1159 ieee80211_led_exit(local);
1160 ieee80211_wep_free(local);
1161 destroy_workqueue(local->workqueue);
1162 fail_workqueue:
1163 wiphy_unregister(local->hw.wiphy);
1164 fail_wiphy_register:
1165 if (local->wiphy_ciphers_allocated)
1166 kfree(local->hw.wiphy->cipher_suites);
1167 kfree(local->int_scan_req);
1168 return result;
1169 }
1170 EXPORT_SYMBOL(ieee80211_register_hw);
1171
1172 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1173 {
1174 struct ieee80211_local *local = hw_to_local(hw);
1175
1176 tasklet_kill(&local->tx_pending_tasklet);
1177 tasklet_kill(&local->tasklet);
1178
1179 #ifdef CONFIG_INET
1180 unregister_inetaddr_notifier(&local->ifa_notifier);
1181 #endif
1182 #if IS_ENABLED(CONFIG_IPV6)
1183 unregister_inet6addr_notifier(&local->ifa6_notifier);
1184 #endif
1185
1186 rtnl_lock();
1187
1188 /*
1189 * At this point, interface list manipulations are fine
1190 * because the driver cannot be handing us frames any
1191 * more and the tasklet is killed.
1192 */
1193 ieee80211_remove_interfaces(local);
1194
1195 rtnl_unlock();
1196
1197 cancel_delayed_work_sync(&local->roc_work);
1198 cancel_work_sync(&local->restart_work);
1199 cancel_work_sync(&local->reconfig_filter);
1200 cancel_work_sync(&local->tdls_chsw_work);
1201 flush_work(&local->sched_scan_stopped_work);
1202 flush_work(&local->radar_detected_work);
1203
1204 ieee80211_clear_tx_pending(local);
1205 rate_control_deinitialize(local);
1206
1207 if (skb_queue_len(&local->skb_queue) ||
1208 skb_queue_len(&local->skb_queue_unreliable))
1209 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1210 skb_queue_purge(&local->skb_queue);
1211 skb_queue_purge(&local->skb_queue_unreliable);
1212 skb_queue_purge(&local->skb_queue_tdls_chsw);
1213 ieee80211_txq_teardown_flows(local);
1214
1215 destroy_workqueue(local->workqueue);
1216 wiphy_unregister(local->hw.wiphy);
1217 ieee80211_wep_free(local);
1218 ieee80211_led_exit(local);
1219 kfree(local->int_scan_req);
1220 }
1221 EXPORT_SYMBOL(ieee80211_unregister_hw);
1222
1223 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1224 {
1225 WARN_ONCE(1, "Have pending ack frames!\n");
1226 kfree_skb(p);
1227 return 0;
1228 }
1229
1230 void ieee80211_free_hw(struct ieee80211_hw *hw)
1231 {
1232 struct ieee80211_local *local = hw_to_local(hw);
1233
1234 mutex_destroy(&local->iflist_mtx);
1235 mutex_destroy(&local->mtx);
1236
1237 if (local->wiphy_ciphers_allocated)
1238 kfree(local->hw.wiphy->cipher_suites);
1239
1240 idr_for_each(&local->ack_status_frames,
1241 ieee80211_free_ack_frame, NULL);
1242 idr_destroy(&local->ack_status_frames);
1243
1244 sta_info_stop(local);
1245
1246 ieee80211_free_led_names(local);
1247
1248 wiphy_free(local->hw.wiphy);
1249 }
1250 EXPORT_SYMBOL(ieee80211_free_hw);
1251
1252 static int __init ieee80211_init(void)
1253 {
1254 struct sk_buff *skb;
1255 int ret;
1256
1257 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1258 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1259 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1260
1261 ret = rc80211_minstrel_init();
1262 if (ret)
1263 return ret;
1264
1265 ret = rc80211_minstrel_ht_init();
1266 if (ret)
1267 goto err_minstrel;
1268
1269 ret = ieee80211_iface_init();
1270 if (ret)
1271 goto err_netdev;
1272
1273 return 0;
1274 err_netdev:
1275 rc80211_minstrel_ht_exit();
1276 err_minstrel:
1277 rc80211_minstrel_exit();
1278
1279 return ret;
1280 }
1281
1282 static void __exit ieee80211_exit(void)
1283 {
1284 rc80211_minstrel_ht_exit();
1285 rc80211_minstrel_exit();
1286
1287 ieee80211s_stop();
1288
1289 ieee80211_iface_exit();
1290
1291 rcu_barrier();
1292 }
1293
1294
1295 subsys_initcall(ieee80211_init);
1296 module_exit(ieee80211_exit);
1297
1298 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1299 MODULE_LICENSE("GPL");
(deprecated) Btrfs devel tree