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TOMOYO Linux Cross Reference
Linux/net/mac80211/main.c

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  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/pm_qos.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 "cfg.h"
 36 #include "debugfs.h"
 37 
 38 void ieee80211_configure_filter(struct ieee80211_local *local)
 39 {
 40         u64 mc;
 41         unsigned int changed_flags;
 42         unsigned int new_flags = 0;
 43 
 44         if (atomic_read(&local->iff_promiscs))
 45                 new_flags |= FIF_PROMISC_IN_BSS;
 46 
 47         if (atomic_read(&local->iff_allmultis))
 48                 new_flags |= FIF_ALLMULTI;
 49 
 50         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
 51             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
 52                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
 53 
 54         if (local->fif_probe_req || local->probe_req_reg)
 55                 new_flags |= FIF_PROBE_REQ;
 56 
 57         if (local->fif_fcsfail)
 58                 new_flags |= FIF_FCSFAIL;
 59 
 60         if (local->fif_plcpfail)
 61                 new_flags |= FIF_PLCPFAIL;
 62 
 63         if (local->fif_control)
 64                 new_flags |= FIF_CONTROL;
 65 
 66         if (local->fif_other_bss)
 67                 new_flags |= FIF_OTHER_BSS;
 68 
 69         if (local->fif_pspoll)
 70                 new_flags |= FIF_PSPOLL;
 71 
 72         spin_lock_bh(&local->filter_lock);
 73         changed_flags = local->filter_flags ^ new_flags;
 74 
 75         mc = drv_prepare_multicast(local, &local->mc_list);
 76         spin_unlock_bh(&local->filter_lock);
 77 
 78         /* be a bit nasty */
 79         new_flags |= (1<<31);
 80 
 81         drv_configure_filter(local, changed_flags, &new_flags, mc);
 82 
 83         WARN_ON(new_flags & (1<<31));
 84 
 85         local->filter_flags = new_flags & ~(1<<31);
 86 }
 87 
 88 static void ieee80211_reconfig_filter(struct work_struct *work)
 89 {
 90         struct ieee80211_local *local =
 91                 container_of(work, struct ieee80211_local, reconfig_filter);
 92 
 93         ieee80211_configure_filter(local);
 94 }
 95 
 96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
 97 {
 98         struct ieee80211_sub_if_data *sdata;
 99         struct cfg80211_chan_def chandef = {};
100         u32 changed = 0;
101         int power;
102         u32 offchannel_flag;
103 
104         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105 
106         if (local->scan_chandef.chan) {
107                 chandef = local->scan_chandef;
108         } else if (local->tmp_channel) {
109                 chandef.chan = local->tmp_channel;
110                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
111                 chandef.center_freq1 = chandef.chan->center_freq;
112         } else
113                 chandef = local->_oper_chandef;
114 
115         WARN(!cfg80211_chandef_valid(&chandef),
116              "control:%d MHz width:%d center: %d/%d MHz",
117              chandef.chan->center_freq, chandef.width,
118              chandef.center_freq1, chandef.center_freq2);
119 
120         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122         else
123                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124 
125         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126 
127         if (offchannel_flag ||
128             !cfg80211_chandef_identical(&local->hw.conf.chandef,
129                                         &local->_oper_chandef)) {
130                 local->hw.conf.chandef = chandef;
131                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132         }
133 
134         if (!conf_is_ht(&local->hw.conf)) {
135                 /*
136                  * mac80211.h documents that this is only valid
137                  * when the channel is set to an HT type, and
138                  * that otherwise STATIC is used.
139                  */
140                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141         } else if (local->hw.conf.smps_mode != local->smps_mode) {
142                 local->hw.conf.smps_mode = local->smps_mode;
143                 changed |= IEEE80211_CONF_CHANGE_SMPS;
144         }
145 
146         power = ieee80211_chandef_max_power(&chandef);
147 
148         rcu_read_lock();
149         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151                         continue;
152                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153                         continue;
154                 power = min(power, sdata->vif.bss_conf.txpower);
155         }
156         rcu_read_unlock();
157 
158         if (local->hw.conf.power_level != power) {
159                 changed |= IEEE80211_CONF_CHANGE_POWER;
160                 local->hw.conf.power_level = power;
161         }
162 
163         return changed;
164 }
165 
166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 {
168         int ret = 0;
169 
170         might_sleep();
171 
172         if (!local->use_chanctx)
173                 changed |= ieee80211_hw_conf_chan(local);
174         else
175                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
176                              IEEE80211_CONF_CHANGE_POWER);
177 
178         if (changed && local->open_count) {
179                 ret = drv_config(local, changed);
180                 /*
181                  * Goal:
182                  * HW reconfiguration should never fail, the driver has told
183                  * us what it can support so it should live up to that promise.
184                  *
185                  * Current status:
186                  * rfkill is not integrated with mac80211 and a
187                  * configuration command can thus fail if hardware rfkill
188                  * is enabled
189                  *
190                  * FIXME: integrate rfkill with mac80211 and then add this
191                  * WARN_ON() back
192                  *
193                  */
194                 /* WARN_ON(ret); */
195         }
196 
197         return ret;
198 }
199 
200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
201                                       u32 changed)
202 {
203         struct ieee80211_local *local = sdata->local;
204 
205         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
206                 return;
207 
208         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
209 }
210 
211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212 {
213         sdata->vif.bss_conf.use_cts_prot = false;
214         sdata->vif.bss_conf.use_short_preamble = false;
215         sdata->vif.bss_conf.use_short_slot = false;
216         return BSS_CHANGED_ERP_CTS_PROT |
217                BSS_CHANGED_ERP_PREAMBLE |
218                BSS_CHANGED_ERP_SLOT;
219 }
220 
221 static void ieee80211_tasklet_handler(unsigned long data)
222 {
223         struct ieee80211_local *local = (struct ieee80211_local *) data;
224         struct sk_buff *skb;
225 
226         while ((skb = skb_dequeue(&local->skb_queue)) ||
227                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
228                 switch (skb->pkt_type) {
229                 case IEEE80211_RX_MSG:
230                         /* Clear skb->pkt_type in order to not confuse kernel
231                          * netstack. */
232                         skb->pkt_type = 0;
233                         ieee80211_rx(&local->hw, skb);
234                         break;
235                 case IEEE80211_TX_STATUS_MSG:
236                         skb->pkt_type = 0;
237                         ieee80211_tx_status(&local->hw, skb);
238                         break;
239                 default:
240                         WARN(1, "mac80211: Packet is of unknown type %d\n",
241                              skb->pkt_type);
242                         dev_kfree_skb(skb);
243                         break;
244                 }
245         }
246 }
247 
248 static void ieee80211_restart_work(struct work_struct *work)
249 {
250         struct ieee80211_local *local =
251                 container_of(work, struct ieee80211_local, restart_work);
252         struct ieee80211_sub_if_data *sdata;
253 
254         /* wait for scan work complete */
255         flush_workqueue(local->workqueue);
256 
257         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
258              "%s called with hardware scan in progress\n", __func__);
259 
260         rtnl_lock();
261         list_for_each_entry(sdata, &local->interfaces, list)
262                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
263         ieee80211_scan_cancel(local);
264         ieee80211_reconfig(local);
265         rtnl_unlock();
266 }
267 
268 void ieee80211_restart_hw(struct ieee80211_hw *hw)
269 {
270         struct ieee80211_local *local = hw_to_local(hw);
271 
272         trace_api_restart_hw(local);
273 
274         wiphy_info(hw->wiphy,
275                    "Hardware restart was requested\n");
276 
277         /* use this reason, ieee80211_reconfig will unblock it */
278         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
279                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
280                                         false);
281 
282         /*
283          * Stop all Rx during the reconfig. We don't want state changes
284          * or driver callbacks while this is in progress.
285          */
286         local->in_reconfig = true;
287         barrier();
288 
289         schedule_work(&local->restart_work);
290 }
291 EXPORT_SYMBOL(ieee80211_restart_hw);
292 
293 #ifdef CONFIG_INET
294 static int ieee80211_ifa_changed(struct notifier_block *nb,
295                                  unsigned long data, void *arg)
296 {
297         struct in_ifaddr *ifa = arg;
298         struct ieee80211_local *local =
299                 container_of(nb, struct ieee80211_local,
300                              ifa_notifier);
301         struct net_device *ndev = ifa->ifa_dev->dev;
302         struct wireless_dev *wdev = ndev->ieee80211_ptr;
303         struct in_device *idev;
304         struct ieee80211_sub_if_data *sdata;
305         struct ieee80211_bss_conf *bss_conf;
306         struct ieee80211_if_managed *ifmgd;
307         int c = 0;
308 
309         /* Make sure it's our interface that got changed */
310         if (!wdev)
311                 return NOTIFY_DONE;
312 
313         if (wdev->wiphy != local->hw.wiphy)
314                 return NOTIFY_DONE;
315 
316         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
317         bss_conf = &sdata->vif.bss_conf;
318 
319         /* ARP filtering is only supported in managed mode */
320         if (sdata->vif.type != NL80211_IFTYPE_STATION)
321                 return NOTIFY_DONE;
322 
323         idev = __in_dev_get_rtnl(sdata->dev);
324         if (!idev)
325                 return NOTIFY_DONE;
326 
327         ifmgd = &sdata->u.mgd;
328         sdata_lock(sdata);
329 
330         /* Copy the addresses to the bss_conf list */
331         ifa = idev->ifa_list;
332         while (ifa) {
333                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
334                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
335                 ifa = ifa->ifa_next;
336                 c++;
337         }
338 
339         bss_conf->arp_addr_cnt = c;
340 
341         /* Configure driver only if associated (which also implies it is up) */
342         if (ifmgd->associated)
343                 ieee80211_bss_info_change_notify(sdata,
344                                                  BSS_CHANGED_ARP_FILTER);
345 
346         sdata_unlock(sdata);
347 
348         return NOTIFY_OK;
349 }
350 #endif
351 
352 #if IS_ENABLED(CONFIG_IPV6)
353 static int ieee80211_ifa6_changed(struct notifier_block *nb,
354                                   unsigned long data, void *arg)
355 {
356         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
357         struct inet6_dev *idev = ifa->idev;
358         struct net_device *ndev = ifa->idev->dev;
359         struct ieee80211_local *local =
360                 container_of(nb, struct ieee80211_local, ifa6_notifier);
361         struct wireless_dev *wdev = ndev->ieee80211_ptr;
362         struct ieee80211_sub_if_data *sdata;
363 
364         /* Make sure it's our interface that got changed */
365         if (!wdev || wdev->wiphy != local->hw.wiphy)
366                 return NOTIFY_DONE;
367 
368         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
369 
370         /*
371          * For now only support station mode. This is mostly because
372          * doing AP would have to handle AP_VLAN in some way ...
373          */
374         if (sdata->vif.type != NL80211_IFTYPE_STATION)
375                 return NOTIFY_DONE;
376 
377         drv_ipv6_addr_change(local, sdata, idev);
378 
379         return NOTIFY_OK;
380 }
381 #endif
382 
383 /* There isn't a lot of sense in it, but you can transmit anything you like */
384 static const struct ieee80211_txrx_stypes
385 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
386         [NL80211_IFTYPE_ADHOC] = {
387                 .tx = 0xffff,
388                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
389                         BIT(IEEE80211_STYPE_AUTH >> 4) |
390                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
391                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
392         },
393         [NL80211_IFTYPE_STATION] = {
394                 .tx = 0xffff,
395                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
396                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
397         },
398         [NL80211_IFTYPE_AP] = {
399                 .tx = 0xffff,
400                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
401                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
402                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
403                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
404                         BIT(IEEE80211_STYPE_AUTH >> 4) |
405                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
406                         BIT(IEEE80211_STYPE_ACTION >> 4),
407         },
408         [NL80211_IFTYPE_AP_VLAN] = {
409                 /* copy AP */
410                 .tx = 0xffff,
411                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
412                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
413                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
414                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
415                         BIT(IEEE80211_STYPE_AUTH >> 4) |
416                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417                         BIT(IEEE80211_STYPE_ACTION >> 4),
418         },
419         [NL80211_IFTYPE_P2P_CLIENT] = {
420                 .tx = 0xffff,
421                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
423         },
424         [NL80211_IFTYPE_P2P_GO] = {
425                 .tx = 0xffff,
426                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
427                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
428                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
429                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
431                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
432                         BIT(IEEE80211_STYPE_ACTION >> 4),
433         },
434         [NL80211_IFTYPE_MESH_POINT] = {
435                 .tx = 0xffff,
436                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
437                         BIT(IEEE80211_STYPE_AUTH >> 4) |
438                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
439         },
440         [NL80211_IFTYPE_P2P_DEVICE] = {
441                 .tx = 0xffff,
442                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
443                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
444         },
445 };
446 
447 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
448         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
449                              IEEE80211_HT_AMPDU_PARM_DENSITY,
450 
451         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
452                                 IEEE80211_HT_CAP_MAX_AMSDU |
453                                 IEEE80211_HT_CAP_SGI_20 |
454                                 IEEE80211_HT_CAP_SGI_40 |
455                                 IEEE80211_HT_CAP_LDPC_CODING |
456                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
457         .mcs = {
458                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
459                              0xff, 0xff, 0xff, 0xff, 0xff, },
460         },
461 };
462 
463 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
464         .vht_cap_info =
465                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
466                             IEEE80211_VHT_CAP_SHORT_GI_80 |
467                             IEEE80211_VHT_CAP_SHORT_GI_160 |
468                             IEEE80211_VHT_CAP_RXSTBC_1 |
469                             IEEE80211_VHT_CAP_RXSTBC_2 |
470                             IEEE80211_VHT_CAP_RXSTBC_3 |
471                             IEEE80211_VHT_CAP_RXSTBC_4 |
472                             IEEE80211_VHT_CAP_TXSTBC |
473                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
474                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
475                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
476                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
477                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
478         .supp_mcs = {
479                 .rx_mcs_map = cpu_to_le16(~0),
480                 .tx_mcs_map = cpu_to_le16(~0),
481         },
482 };
483 
484 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
485                                            const struct ieee80211_ops *ops,
486                                            const char *requested_name)
487 {
488         struct ieee80211_local *local;
489         int priv_size, i;
490         struct wiphy *wiphy;
491         bool use_chanctx;
492 
493         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
494                     !ops->add_interface || !ops->remove_interface ||
495                     !ops->configure_filter))
496                 return NULL;
497 
498         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
499                 return NULL;
500 
501         /* check all or no channel context operations exist */
502         i = !!ops->add_chanctx + !!ops->remove_chanctx +
503             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
504             !!ops->unassign_vif_chanctx;
505         if (WARN_ON(i != 0 && i != 5))
506                 return NULL;
507         use_chanctx = i == 5;
508 
509         /* Ensure 32-byte alignment of our private data and hw private data.
510          * We use the wiphy priv data for both our ieee80211_local and for
511          * the driver's private data
512          *
513          * In memory it'll be like this:
514          *
515          * +-------------------------+
516          * | struct wiphy           |
517          * +-------------------------+
518          * | struct ieee80211_local  |
519          * +-------------------------+
520          * | driver's private data   |
521          * +-------------------------+
522          *
523          */
524         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
525 
526         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
527 
528         if (!wiphy)
529                 return NULL;
530 
531         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
532 
533         wiphy->privid = mac80211_wiphy_privid;
534 
535         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
536                         WIPHY_FLAG_4ADDR_AP |
537                         WIPHY_FLAG_4ADDR_STATION |
538                         WIPHY_FLAG_REPORTS_OBSS |
539                         WIPHY_FLAG_OFFCHAN_TX;
540 
541         if (ops->remain_on_channel)
542                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
543 
544         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
545                            NL80211_FEATURE_SAE |
546                            NL80211_FEATURE_HT_IBSS |
547                            NL80211_FEATURE_VIF_TXPOWER |
548                            NL80211_FEATURE_MAC_ON_CREATE |
549                            NL80211_FEATURE_USERSPACE_MPM;
550 
551         if (!ops->hw_scan)
552                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
553                                    NL80211_FEATURE_AP_SCAN;
554 
555 
556         if (!ops->set_key)
557                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
558 
559         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
560 
561         local = wiphy_priv(wiphy);
562 
563         if (sta_info_init(local))
564                 goto err_free;
565 
566         local->hw.wiphy = wiphy;
567 
568         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
569 
570         local->ops = ops;
571         local->use_chanctx = use_chanctx;
572 
573         /* set up some defaults */
574         local->hw.queues = 1;
575         local->hw.max_rates = 1;
576         local->hw.max_report_rates = 0;
577         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
578         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
580         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
581         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
582         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
583                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
584                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
585         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
586                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
587         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
588         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
589         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
590         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
591         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
592 
593         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
594 
595         wiphy->extended_capabilities = local->ext_capa;
596         wiphy->extended_capabilities_mask = local->ext_capa;
597         wiphy->extended_capabilities_len =
598                 ARRAY_SIZE(local->ext_capa);
599 
600         INIT_LIST_HEAD(&local->interfaces);
601 
602         __hw_addr_init(&local->mc_list);
603 
604         mutex_init(&local->iflist_mtx);
605         mutex_init(&local->mtx);
606 
607         mutex_init(&local->key_mtx);
608         spin_lock_init(&local->filter_lock);
609         spin_lock_init(&local->rx_path_lock);
610         spin_lock_init(&local->queue_stop_reason_lock);
611 
612         INIT_LIST_HEAD(&local->chanctx_list);
613         mutex_init(&local->chanctx_mtx);
614 
615         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
616 
617         INIT_WORK(&local->restart_work, ieee80211_restart_work);
618 
619         INIT_WORK(&local->radar_detected_work,
620                   ieee80211_dfs_radar_detected_work);
621 
622         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
623         local->smps_mode = IEEE80211_SMPS_OFF;
624 
625         INIT_WORK(&local->dynamic_ps_enable_work,
626                   ieee80211_dynamic_ps_enable_work);
627         INIT_WORK(&local->dynamic_ps_disable_work,
628                   ieee80211_dynamic_ps_disable_work);
629         setup_timer(&local->dynamic_ps_timer,
630                     ieee80211_dynamic_ps_timer, (unsigned long) local);
631 
632         INIT_WORK(&local->sched_scan_stopped_work,
633                   ieee80211_sched_scan_stopped_work);
634 
635         spin_lock_init(&local->ack_status_lock);
636         idr_init(&local->ack_status_frames);
637 
638         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
639                 skb_queue_head_init(&local->pending[i]);
640                 atomic_set(&local->agg_queue_stop[i], 0);
641         }
642         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
643                      (unsigned long)local);
644 
645         tasklet_init(&local->tasklet,
646                      ieee80211_tasklet_handler,
647                      (unsigned long) local);
648 
649         skb_queue_head_init(&local->skb_queue);
650         skb_queue_head_init(&local->skb_queue_unreliable);
651 
652         ieee80211_led_names(local);
653 
654         ieee80211_roc_setup(local);
655 
656         return &local->hw;
657  err_free:
658         wiphy_free(wiphy);
659         return NULL;
660 }
661 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
662 
663 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
664 {
665         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
666                           IS_ERR(local->wep_rx_tfm));
667         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
668         int n_suites = 0, r = 0, w = 0;
669         u32 *suites;
670         static const u32 cipher_suites[] = {
671                 /* keep WEP first, it may be removed below */
672                 WLAN_CIPHER_SUITE_WEP40,
673                 WLAN_CIPHER_SUITE_WEP104,
674                 WLAN_CIPHER_SUITE_TKIP,
675                 WLAN_CIPHER_SUITE_CCMP,
676                 WLAN_CIPHER_SUITE_CCMP_256,
677                 WLAN_CIPHER_SUITE_GCMP,
678                 WLAN_CIPHER_SUITE_GCMP_256,
679 
680                 /* keep last -- depends on hw flags! */
681                 WLAN_CIPHER_SUITE_AES_CMAC,
682                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
683                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
684                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
685         };
686 
687         if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
688             local->hw.wiphy->cipher_suites) {
689                 /* If the driver advertises, or doesn't support SW crypto,
690                  * we only need to remove WEP if necessary.
691                  */
692                 if (have_wep)
693                         return 0;
694 
695                 /* well if it has _no_ ciphers ... fine */
696                 if (!local->hw.wiphy->n_cipher_suites)
697                         return 0;
698 
699                 /* Driver provides cipher suites, but we need to exclude WEP */
700                 suites = kmemdup(local->hw.wiphy->cipher_suites,
701                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
702                                  GFP_KERNEL);
703                 if (!suites)
704                         return -ENOMEM;
705 
706                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
707                         u32 suite = local->hw.wiphy->cipher_suites[r];
708 
709                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
710                             suite == WLAN_CIPHER_SUITE_WEP104)
711                                 continue;
712                         suites[w++] = suite;
713                 }
714         } else if (!local->hw.cipher_schemes) {
715                 /* If the driver doesn't have cipher schemes, there's nothing
716                  * else to do other than assign the (software supported and
717                  * perhaps offloaded) cipher suites.
718                  */
719                 local->hw.wiphy->cipher_suites = cipher_suites;
720                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
721 
722                 if (!have_mfp)
723                         local->hw.wiphy->n_cipher_suites -= 4;
724 
725                 if (!have_wep) {
726                         local->hw.wiphy->cipher_suites += 2;
727                         local->hw.wiphy->n_cipher_suites -= 2;
728                 }
729 
730                 /* not dynamically allocated, so just return */
731                 return 0;
732         } else {
733                 const struct ieee80211_cipher_scheme *cs;
734 
735                 cs = local->hw.cipher_schemes;
736 
737                 /* Driver specifies cipher schemes only (but not cipher suites
738                  * including the schemes)
739                  *
740                  * We start counting ciphers defined by schemes, TKIP, CCMP,
741                  * CCMP-256, GCMP, and GCMP-256
742                  */
743                 n_suites = local->hw.n_cipher_schemes + 5;
744 
745                 /* check if we have WEP40 and WEP104 */
746                 if (have_wep)
747                         n_suites += 2;
748 
749                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
750                  * BIP-GMAC-256
751                  */
752                 if (have_mfp)
753                         n_suites += 4;
754 
755                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
756                 if (!suites)
757                         return -ENOMEM;
758 
759                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
760                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
761                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
762                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
763                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
764 
765                 if (have_wep) {
766                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
767                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
768                 }
769 
770                 if (have_mfp) {
771                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
772                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
773                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
774                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
775                 }
776 
777                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
778                         suites[w++] = cs[r].cipher;
779         }
780 
781         local->hw.wiphy->cipher_suites = suites;
782         local->hw.wiphy->n_cipher_suites = w;
783         local->wiphy_ciphers_allocated = true;
784 
785         return 0;
786 }
787 
788 int ieee80211_register_hw(struct ieee80211_hw *hw)
789 {
790         struct ieee80211_local *local = hw_to_local(hw);
791         int result, i;
792         enum ieee80211_band band;
793         int channels, max_bitrates;
794         bool supp_ht, supp_vht;
795         netdev_features_t feature_whitelist;
796         struct cfg80211_chan_def dflt_chandef = {};
797 
798         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
799             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
800              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
801                 return -EINVAL;
802 
803         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
804             (!local->ops->tdls_channel_switch ||
805              !local->ops->tdls_cancel_channel_switch ||
806              !local->ops->tdls_recv_channel_switch))
807                 return -EOPNOTSUPP;
808 
809 #ifdef CONFIG_PM
810         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
811                 return -EINVAL;
812 #endif
813 
814         if (!local->use_chanctx) {
815                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
816                         const struct ieee80211_iface_combination *comb;
817 
818                         comb = &local->hw.wiphy->iface_combinations[i];
819 
820                         if (comb->num_different_channels > 1)
821                                 return -EINVAL;
822                 }
823         } else {
824                 /*
825                  * WDS is currently prohibited when channel contexts are used
826                  * because there's no clear definition of which channel WDS
827                  * type interfaces use
828                  */
829                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
830                         return -EINVAL;
831 
832                 /* DFS is not supported with multi-channel combinations yet */
833                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
834                         const struct ieee80211_iface_combination *comb;
835 
836                         comb = &local->hw.wiphy->iface_combinations[i];
837 
838                         if (comb->radar_detect_widths &&
839                             comb->num_different_channels > 1)
840                                 return -EINVAL;
841                 }
842         }
843 
844         /* Only HW csum features are currently compatible with mac80211 */
845         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
846                             NETIF_F_HW_CSUM;
847         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
848                 return -EINVAL;
849 
850         if (hw->max_report_rates == 0)
851                 hw->max_report_rates = hw->max_rates;
852 
853         local->rx_chains = 1;
854 
855         /*
856          * generic code guarantees at least one band,
857          * set this very early because much code assumes
858          * that hw.conf.channel is assigned
859          */
860         channels = 0;
861         max_bitrates = 0;
862         supp_ht = false;
863         supp_vht = false;
864         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
865                 struct ieee80211_supported_band *sband;
866 
867                 sband = local->hw.wiphy->bands[band];
868                 if (!sband)
869                         continue;
870 
871                 if (!dflt_chandef.chan) {
872                         cfg80211_chandef_create(&dflt_chandef,
873                                                 &sband->channels[0],
874                                                 NL80211_CHAN_NO_HT);
875                         /* init channel we're on */
876                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
877                                 local->hw.conf.chandef = dflt_chandef;
878                                 local->_oper_chandef = dflt_chandef;
879                         }
880                         local->monitor_chandef = dflt_chandef;
881                 }
882 
883                 channels += sband->n_channels;
884 
885                 if (max_bitrates < sband->n_bitrates)
886                         max_bitrates = sband->n_bitrates;
887                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
888                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
889 
890                 if (!sband->ht_cap.ht_supported)
891                         continue;
892 
893                 /* TODO: consider VHT for RX chains, hopefully it's the same */
894                 local->rx_chains =
895                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
896                             local->rx_chains);
897 
898                 /* no need to mask, SM_PS_DISABLED has all bits set */
899                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
900                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
901         }
902 
903         /* if low-level driver supports AP, we also support VLAN */
904         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
905                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
906                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
907         }
908 
909         /* mac80211 always supports monitor */
910         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
911         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
912 
913         /* mac80211 doesn't support more than one IBSS interface right now */
914         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
915                 const struct ieee80211_iface_combination *c;
916                 int j;
917 
918                 c = &hw->wiphy->iface_combinations[i];
919 
920                 for (j = 0; j < c->n_limits; j++)
921                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
922                             c->limits[j].max > 1)
923                                 return -EINVAL;
924         }
925 
926         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
927                                       sizeof(void *) * channels, GFP_KERNEL);
928         if (!local->int_scan_req)
929                 return -ENOMEM;
930 
931         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
932                 if (!local->hw.wiphy->bands[band])
933                         continue;
934                 local->int_scan_req->rates[band] = (u32) -1;
935         }
936 
937 #ifndef CONFIG_MAC80211_MESH
938         /* mesh depends on Kconfig, but drivers should set it if they want */
939         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
940 #endif
941 
942         /* if the underlying driver supports mesh, mac80211 will (at least)
943          * provide routing of mesh authentication frames to userspace */
944         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
945                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
946 
947         /* mac80211 supports control port protocol changing */
948         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
949 
950         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
951                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
952         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
953                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
954                 if (hw->max_signal <= 0) {
955                         result = -EINVAL;
956                         goto fail_wiphy_register;
957                 }
958         }
959 
960         /*
961          * Calculate scan IE length -- we need this to alloc
962          * memory and to subtract from the driver limit. It
963          * includes the DS Params, (extended) supported rates, and HT
964          * information -- SSID is the driver's responsibility.
965          */
966         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
967                 3 /* DS Params */;
968         if (supp_ht)
969                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
970 
971         if (supp_vht)
972                 local->scan_ies_len +=
973                         2 + sizeof(struct ieee80211_vht_cap);
974 
975         if (!local->ops->hw_scan) {
976                 /* For hw_scan, driver needs to set these up. */
977                 local->hw.wiphy->max_scan_ssids = 4;
978                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
979         }
980 
981         /*
982          * If the driver supports any scan IEs, then assume the
983          * limit includes the IEs mac80211 will add, otherwise
984          * leave it at zero and let the driver sort it out; we
985          * still pass our IEs to the driver but userspace will
986          * not be allowed to in that case.
987          */
988         if (local->hw.wiphy->max_scan_ie_len)
989                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
990 
991         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
992                                          local->hw.n_cipher_schemes));
993 
994         result = ieee80211_init_cipher_suites(local);
995         if (result < 0)
996                 goto fail_wiphy_register;
997 
998         if (!local->ops->remain_on_channel)
999                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1000 
1001         /* mac80211 based drivers don't support internal TDLS setup */
1002         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1003                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1004 
1005         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1006         if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
1007                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1008 
1009         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1010 
1011         result = wiphy_register(local->hw.wiphy);
1012         if (result < 0)
1013                 goto fail_wiphy_register;
1014 
1015         /*
1016          * We use the number of queues for feature tests (QoS, HT) internally
1017          * so restrict them appropriately.
1018          */
1019         if (hw->queues > IEEE80211_MAX_QUEUES)
1020                 hw->queues = IEEE80211_MAX_QUEUES;
1021 
1022         local->workqueue =
1023                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1024         if (!local->workqueue) {
1025                 result = -ENOMEM;
1026                 goto fail_workqueue;
1027         }
1028 
1029         /*
1030          * The hardware needs headroom for sending the frame,
1031          * and we need some headroom for passing the frame to monitor
1032          * interfaces, but never both at the same time.
1033          */
1034         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1035                                    IEEE80211_TX_STATUS_HEADROOM);
1036 
1037         debugfs_hw_add(local);
1038 
1039         /*
1040          * if the driver doesn't specify a max listen interval we
1041          * use 5 which should be a safe default
1042          */
1043         if (local->hw.max_listen_interval == 0)
1044                 local->hw.max_listen_interval = 5;
1045 
1046         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1047 
1048         local->dynamic_ps_forced_timeout = -1;
1049 
1050         if (!local->hw.txq_ac_max_pending)
1051                 local->hw.txq_ac_max_pending = 64;
1052 
1053         result = ieee80211_wep_init(local);
1054         if (result < 0)
1055                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1056                             result);
1057 
1058         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1059 
1060         ieee80211_led_init(local);
1061 
1062         rtnl_lock();
1063 
1064         result = ieee80211_init_rate_ctrl_alg(local,
1065                                               hw->rate_control_algorithm);
1066         if (result < 0) {
1067                 wiphy_debug(local->hw.wiphy,
1068                             "Failed to initialize rate control algorithm\n");
1069                 goto fail_rate;
1070         }
1071 
1072         /* add one default STA interface if supported */
1073         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1074             !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1075                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1076                                           NL80211_IFTYPE_STATION, NULL);
1077                 if (result)
1078                         wiphy_warn(local->hw.wiphy,
1079                                    "Failed to add default virtual iface\n");
1080         }
1081 
1082         rtnl_unlock();
1083 
1084         local->network_latency_notifier.notifier_call =
1085                 ieee80211_max_network_latency;
1086         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1087                                      &local->network_latency_notifier);
1088         if (result)
1089                 goto fail_pm_qos;
1090 
1091 #ifdef CONFIG_INET
1092         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1093         result = register_inetaddr_notifier(&local->ifa_notifier);
1094         if (result)
1095                 goto fail_ifa;
1096 #endif
1097 
1098 #if IS_ENABLED(CONFIG_IPV6)
1099         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1100         result = register_inet6addr_notifier(&local->ifa6_notifier);
1101         if (result)
1102                 goto fail_ifa6;
1103 #endif
1104 
1105         return 0;
1106 
1107 #if IS_ENABLED(CONFIG_IPV6)
1108  fail_ifa6:
1109 #ifdef CONFIG_INET
1110         unregister_inetaddr_notifier(&local->ifa_notifier);
1111 #endif
1112 #endif
1113 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1114  fail_ifa:
1115         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1116                                &local->network_latency_notifier);
1117 #endif
1118  fail_pm_qos:
1119         rtnl_lock();
1120         rate_control_deinitialize(local);
1121         ieee80211_remove_interfaces(local);
1122  fail_rate:
1123         rtnl_unlock();
1124         ieee80211_led_exit(local);
1125         ieee80211_wep_free(local);
1126         destroy_workqueue(local->workqueue);
1127  fail_workqueue:
1128         wiphy_unregister(local->hw.wiphy);
1129  fail_wiphy_register:
1130         if (local->wiphy_ciphers_allocated)
1131                 kfree(local->hw.wiphy->cipher_suites);
1132         kfree(local->int_scan_req);
1133         return result;
1134 }
1135 EXPORT_SYMBOL(ieee80211_register_hw);
1136 
1137 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1138                         struct net_device *napi_dev,
1139                         int (*poll)(struct napi_struct *, int),
1140                         int weight)
1141 {
1142         struct ieee80211_local *local = hw_to_local(hw);
1143 
1144         netif_napi_add(napi_dev, napi, poll, weight);
1145         local->napi = napi;
1146 }
1147 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1148 
1149 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1150 {
1151         struct ieee80211_local *local = hw_to_local(hw);
1152 
1153         tasklet_kill(&local->tx_pending_tasklet);
1154         tasklet_kill(&local->tasklet);
1155 
1156         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1157                                &local->network_latency_notifier);
1158 #ifdef CONFIG_INET
1159         unregister_inetaddr_notifier(&local->ifa_notifier);
1160 #endif
1161 #if IS_ENABLED(CONFIG_IPV6)
1162         unregister_inet6addr_notifier(&local->ifa6_notifier);
1163 #endif
1164 
1165         rtnl_lock();
1166 
1167         /*
1168          * At this point, interface list manipulations are fine
1169          * because the driver cannot be handing us frames any
1170          * more and the tasklet is killed.
1171          */
1172         ieee80211_remove_interfaces(local);
1173 
1174         rtnl_unlock();
1175 
1176         cancel_work_sync(&local->restart_work);
1177         cancel_work_sync(&local->reconfig_filter);
1178         flush_work(&local->sched_scan_stopped_work);
1179 
1180         ieee80211_clear_tx_pending(local);
1181         rate_control_deinitialize(local);
1182 
1183         if (skb_queue_len(&local->skb_queue) ||
1184             skb_queue_len(&local->skb_queue_unreliable))
1185                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1186         skb_queue_purge(&local->skb_queue);
1187         skb_queue_purge(&local->skb_queue_unreliable);
1188 
1189         destroy_workqueue(local->workqueue);
1190         wiphy_unregister(local->hw.wiphy);
1191         ieee80211_wep_free(local);
1192         ieee80211_led_exit(local);
1193         kfree(local->int_scan_req);
1194 }
1195 EXPORT_SYMBOL(ieee80211_unregister_hw);
1196 
1197 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1198 {
1199         WARN_ONCE(1, "Have pending ack frames!\n");
1200         kfree_skb(p);
1201         return 0;
1202 }
1203 
1204 void ieee80211_free_hw(struct ieee80211_hw *hw)
1205 {
1206         struct ieee80211_local *local = hw_to_local(hw);
1207 
1208         mutex_destroy(&local->iflist_mtx);
1209         mutex_destroy(&local->mtx);
1210 
1211         if (local->wiphy_ciphers_allocated)
1212                 kfree(local->hw.wiphy->cipher_suites);
1213 
1214         idr_for_each(&local->ack_status_frames,
1215                      ieee80211_free_ack_frame, NULL);
1216         idr_destroy(&local->ack_status_frames);
1217 
1218         sta_info_stop(local);
1219 
1220         wiphy_free(local->hw.wiphy);
1221 }
1222 EXPORT_SYMBOL(ieee80211_free_hw);
1223 
1224 static int __init ieee80211_init(void)
1225 {
1226         struct sk_buff *skb;
1227         int ret;
1228 
1229         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1230         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1231                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1232 
1233         ret = rc80211_minstrel_init();
1234         if (ret)
1235                 return ret;
1236 
1237         ret = rc80211_minstrel_ht_init();
1238         if (ret)
1239                 goto err_minstrel;
1240 
1241         ret = ieee80211_iface_init();
1242         if (ret)
1243                 goto err_netdev;
1244 
1245         return 0;
1246  err_netdev:
1247         rc80211_minstrel_ht_exit();
1248  err_minstrel:
1249         rc80211_minstrel_exit();
1250 
1251         return ret;
1252 }
1253 
1254 static void __exit ieee80211_exit(void)
1255 {
1256         rc80211_minstrel_ht_exit();
1257         rc80211_minstrel_exit();
1258 
1259         ieee80211s_stop();
1260 
1261         ieee80211_iface_exit();
1262 
1263         rcu_barrier();
1264 }
1265 
1266 
1267 subsys_initcall(ieee80211_init);
1268 module_exit(ieee80211_exit);
1269 
1270 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1271 MODULE_LICENSE("GPL");
1272 

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