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

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  1 /*
  2  * mac80211 configuration hooks for cfg80211
  3  *
  4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
  5  * Copyright 2013-2014  Intel Mobile Communications GmbH
  6  *
  7  * This file is GPLv2 as found in COPYING.
  8  */
  9 
 10 #include <linux/ieee80211.h>
 11 #include <linux/nl80211.h>
 12 #include <linux/rtnetlink.h>
 13 #include <linux/slab.h>
 14 #include <net/net_namespace.h>
 15 #include <linux/rcupdate.h>
 16 #include <linux/if_ether.h>
 17 #include <net/cfg80211.h>
 18 #include "ieee80211_i.h"
 19 #include "driver-ops.h"
 20 #include "cfg.h"
 21 #include "rate.h"
 22 #include "mesh.h"
 23 #include "wme.h"
 24 
 25 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
 26                                                 const char *name,
 27                                                 enum nl80211_iftype type,
 28                                                 u32 *flags,
 29                                                 struct vif_params *params)
 30 {
 31         struct ieee80211_local *local = wiphy_priv(wiphy);
 32         struct wireless_dev *wdev;
 33         struct ieee80211_sub_if_data *sdata;
 34         int err;
 35 
 36         err = ieee80211_if_add(local, name, &wdev, type, params);
 37         if (err)
 38                 return ERR_PTR(err);
 39 
 40         if (type == NL80211_IFTYPE_MONITOR && flags) {
 41                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 42                 sdata->u.mntr_flags = *flags;
 43         }
 44 
 45         return wdev;
 46 }
 47 
 48 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
 49 {
 50         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
 51 
 52         return 0;
 53 }
 54 
 55 static int ieee80211_change_iface(struct wiphy *wiphy,
 56                                   struct net_device *dev,
 57                                   enum nl80211_iftype type, u32 *flags,
 58                                   struct vif_params *params)
 59 {
 60         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 61         int ret;
 62 
 63         ret = ieee80211_if_change_type(sdata, type);
 64         if (ret)
 65                 return ret;
 66 
 67         if (type == NL80211_IFTYPE_AP_VLAN &&
 68             params && params->use_4addr == 0)
 69                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
 70         else if (type == NL80211_IFTYPE_STATION &&
 71                  params && params->use_4addr >= 0)
 72                 sdata->u.mgd.use_4addr = params->use_4addr;
 73 
 74         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
 75                 struct ieee80211_local *local = sdata->local;
 76 
 77                 if (ieee80211_sdata_running(sdata)) {
 78                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
 79                                    MONITOR_FLAG_ACTIVE;
 80 
 81                         /*
 82                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
 83                          * MONITOR_FLAG_ACTIVE to be changed while the
 84                          * interface is up.
 85                          * Else we would need to add a lot of cruft
 86                          * to update everything:
 87                          *      cooked_mntrs, monitor and all fif_* counters
 88                          *      reconfigure hardware
 89                          */
 90                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
 91                                 return -EBUSY;
 92 
 93                         ieee80211_adjust_monitor_flags(sdata, -1);
 94                         sdata->u.mntr_flags = *flags;
 95                         ieee80211_adjust_monitor_flags(sdata, 1);
 96 
 97                         ieee80211_configure_filter(local);
 98                 } else {
 99                         /*
100                          * Because the interface is down, ieee80211_do_stop
101                          * and ieee80211_do_open take care of "everything"
102                          * mentioned in the comment above.
103                          */
104                         sdata->u.mntr_flags = *flags;
105                 }
106         }
107 
108         return 0;
109 }
110 
111 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
112                                       struct wireless_dev *wdev)
113 {
114         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
115         int ret;
116 
117         mutex_lock(&sdata->local->chanctx_mtx);
118         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
119         mutex_unlock(&sdata->local->chanctx_mtx);
120         if (ret < 0)
121                 return ret;
122 
123         return ieee80211_do_open(wdev, true);
124 }
125 
126 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
127                                       struct wireless_dev *wdev)
128 {
129         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
130 }
131 
132 static int ieee80211_set_noack_map(struct wiphy *wiphy,
133                                   struct net_device *dev,
134                                   u16 noack_map)
135 {
136         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
137 
138         sdata->noack_map = noack_map;
139         return 0;
140 }
141 
142 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
143                              u8 key_idx, bool pairwise, const u8 *mac_addr,
144                              struct key_params *params)
145 {
146         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
147         struct ieee80211_local *local = sdata->local;
148         struct sta_info *sta = NULL;
149         const struct ieee80211_cipher_scheme *cs = NULL;
150         struct ieee80211_key *key;
151         int err;
152 
153         if (!ieee80211_sdata_running(sdata))
154                 return -ENETDOWN;
155 
156         /* reject WEP and TKIP keys if WEP failed to initialize */
157         switch (params->cipher) {
158         case WLAN_CIPHER_SUITE_WEP40:
159         case WLAN_CIPHER_SUITE_TKIP:
160         case WLAN_CIPHER_SUITE_WEP104:
161                 if (IS_ERR(local->wep_tx_tfm))
162                         return -EINVAL;
163                 break;
164         case WLAN_CIPHER_SUITE_CCMP:
165         case WLAN_CIPHER_SUITE_CCMP_256:
166         case WLAN_CIPHER_SUITE_AES_CMAC:
167         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
168         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
169         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
170         case WLAN_CIPHER_SUITE_GCMP:
171         case WLAN_CIPHER_SUITE_GCMP_256:
172                 break;
173         default:
174                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
175                 break;
176         }
177 
178         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
179                                   params->key, params->seq_len, params->seq,
180                                   cs);
181         if (IS_ERR(key))
182                 return PTR_ERR(key);
183 
184         if (pairwise)
185                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
186 
187         mutex_lock(&local->sta_mtx);
188 
189         if (mac_addr) {
190                 if (ieee80211_vif_is_mesh(&sdata->vif))
191                         sta = sta_info_get(sdata, mac_addr);
192                 else
193                         sta = sta_info_get_bss(sdata, mac_addr);
194                 /*
195                  * The ASSOC test makes sure the driver is ready to
196                  * receive the key. When wpa_supplicant has roamed
197                  * using FT, it attempts to set the key before
198                  * association has completed, this rejects that attempt
199                  * so it will set the key again after association.
200                  *
201                  * TODO: accept the key if we have a station entry and
202                  *       add it to the device after the station.
203                  */
204                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
205                         ieee80211_key_free_unused(key);
206                         err = -ENOENT;
207                         goto out_unlock;
208                 }
209         }
210 
211         switch (sdata->vif.type) {
212         case NL80211_IFTYPE_STATION:
213                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
214                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
215                 break;
216         case NL80211_IFTYPE_AP:
217         case NL80211_IFTYPE_AP_VLAN:
218                 /* Keys without a station are used for TX only */
219                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
220                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
221                 break;
222         case NL80211_IFTYPE_ADHOC:
223                 /* no MFP (yet) */
224                 break;
225         case NL80211_IFTYPE_MESH_POINT:
226 #ifdef CONFIG_MAC80211_MESH
227                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
228                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
229                 break;
230 #endif
231         case NL80211_IFTYPE_WDS:
232         case NL80211_IFTYPE_MONITOR:
233         case NL80211_IFTYPE_P2P_DEVICE:
234         case NL80211_IFTYPE_UNSPECIFIED:
235         case NUM_NL80211_IFTYPES:
236         case NL80211_IFTYPE_P2P_CLIENT:
237         case NL80211_IFTYPE_P2P_GO:
238         case NL80211_IFTYPE_OCB:
239                 /* shouldn't happen */
240                 WARN_ON_ONCE(1);
241                 break;
242         }
243 
244         if (sta)
245                 sta->cipher_scheme = cs;
246 
247         err = ieee80211_key_link(key, sdata, sta);
248 
249  out_unlock:
250         mutex_unlock(&local->sta_mtx);
251 
252         return err;
253 }
254 
255 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
256                              u8 key_idx, bool pairwise, const u8 *mac_addr)
257 {
258         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
259         struct ieee80211_local *local = sdata->local;
260         struct sta_info *sta;
261         struct ieee80211_key *key = NULL;
262         int ret;
263 
264         mutex_lock(&local->sta_mtx);
265         mutex_lock(&local->key_mtx);
266 
267         if (mac_addr) {
268                 ret = -ENOENT;
269 
270                 sta = sta_info_get_bss(sdata, mac_addr);
271                 if (!sta)
272                         goto out_unlock;
273 
274                 if (pairwise)
275                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
276                 else
277                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
278         } else
279                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
280 
281         if (!key) {
282                 ret = -ENOENT;
283                 goto out_unlock;
284         }
285 
286         ieee80211_key_free(key, true);
287 
288         ret = 0;
289  out_unlock:
290         mutex_unlock(&local->key_mtx);
291         mutex_unlock(&local->sta_mtx);
292 
293         return ret;
294 }
295 
296 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
297                              u8 key_idx, bool pairwise, const u8 *mac_addr,
298                              void *cookie,
299                              void (*callback)(void *cookie,
300                                               struct key_params *params))
301 {
302         struct ieee80211_sub_if_data *sdata;
303         struct sta_info *sta = NULL;
304         u8 seq[6] = {0};
305         struct key_params params;
306         struct ieee80211_key *key = NULL;
307         u64 pn64;
308         u32 iv32;
309         u16 iv16;
310         int err = -ENOENT;
311 
312         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
313 
314         rcu_read_lock();
315 
316         if (mac_addr) {
317                 sta = sta_info_get_bss(sdata, mac_addr);
318                 if (!sta)
319                         goto out;
320 
321                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
322                         key = rcu_dereference(sta->ptk[key_idx]);
323                 else if (!pairwise &&
324                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
325                         key = rcu_dereference(sta->gtk[key_idx]);
326         } else
327                 key = rcu_dereference(sdata->keys[key_idx]);
328 
329         if (!key)
330                 goto out;
331 
332         memset(&params, 0, sizeof(params));
333 
334         params.cipher = key->conf.cipher;
335 
336         switch (key->conf.cipher) {
337         case WLAN_CIPHER_SUITE_TKIP:
338                 iv32 = key->u.tkip.tx.iv32;
339                 iv16 = key->u.tkip.tx.iv16;
340 
341                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
342                         drv_get_tkip_seq(sdata->local,
343                                          key->conf.hw_key_idx,
344                                          &iv32, &iv16);
345 
346                 seq[0] = iv16 & 0xff;
347                 seq[1] = (iv16 >> 8) & 0xff;
348                 seq[2] = iv32 & 0xff;
349                 seq[3] = (iv32 >> 8) & 0xff;
350                 seq[4] = (iv32 >> 16) & 0xff;
351                 seq[5] = (iv32 >> 24) & 0xff;
352                 params.seq = seq;
353                 params.seq_len = 6;
354                 break;
355         case WLAN_CIPHER_SUITE_CCMP:
356         case WLAN_CIPHER_SUITE_CCMP_256:
357                 pn64 = atomic64_read(&key->u.ccmp.tx_pn);
358                 seq[0] = pn64;
359                 seq[1] = pn64 >> 8;
360                 seq[2] = pn64 >> 16;
361                 seq[3] = pn64 >> 24;
362                 seq[4] = pn64 >> 32;
363                 seq[5] = pn64 >> 40;
364                 params.seq = seq;
365                 params.seq_len = 6;
366                 break;
367         case WLAN_CIPHER_SUITE_AES_CMAC:
368         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
369                 pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
370                 seq[0] = pn64;
371                 seq[1] = pn64 >> 8;
372                 seq[2] = pn64 >> 16;
373                 seq[3] = pn64 >> 24;
374                 seq[4] = pn64 >> 32;
375                 seq[5] = pn64 >> 40;
376                 params.seq = seq;
377                 params.seq_len = 6;
378                 break;
379         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
380         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
381                 pn64 = atomic64_read(&key->u.aes_gmac.tx_pn);
382                 seq[0] = pn64;
383                 seq[1] = pn64 >> 8;
384                 seq[2] = pn64 >> 16;
385                 seq[3] = pn64 >> 24;
386                 seq[4] = pn64 >> 32;
387                 seq[5] = pn64 >> 40;
388                 params.seq = seq;
389                 params.seq_len = 6;
390                 break;
391         case WLAN_CIPHER_SUITE_GCMP:
392         case WLAN_CIPHER_SUITE_GCMP_256:
393                 pn64 = atomic64_read(&key->u.gcmp.tx_pn);
394                 seq[0] = pn64;
395                 seq[1] = pn64 >> 8;
396                 seq[2] = pn64 >> 16;
397                 seq[3] = pn64 >> 24;
398                 seq[4] = pn64 >> 32;
399                 seq[5] = pn64 >> 40;
400                 params.seq = seq;
401                 params.seq_len = 6;
402                 break;
403         }
404 
405         params.key = key->conf.key;
406         params.key_len = key->conf.keylen;
407 
408         callback(cookie, &params);
409         err = 0;
410 
411  out:
412         rcu_read_unlock();
413         return err;
414 }
415 
416 static int ieee80211_config_default_key(struct wiphy *wiphy,
417                                         struct net_device *dev,
418                                         u8 key_idx, bool uni,
419                                         bool multi)
420 {
421         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
422 
423         ieee80211_set_default_key(sdata, key_idx, uni, multi);
424 
425         return 0;
426 }
427 
428 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
429                                              struct net_device *dev,
430                                              u8 key_idx)
431 {
432         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
433 
434         ieee80211_set_default_mgmt_key(sdata, key_idx);
435 
436         return 0;
437 }
438 
439 void sta_set_rate_info_tx(struct sta_info *sta,
440                           const struct ieee80211_tx_rate *rate,
441                           struct rate_info *rinfo)
442 {
443         rinfo->flags = 0;
444         if (rate->flags & IEEE80211_TX_RC_MCS) {
445                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
446                 rinfo->mcs = rate->idx;
447         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
448                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
449                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
450                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
451         } else {
452                 struct ieee80211_supported_band *sband;
453                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
454                 u16 brate;
455 
456                 sband = sta->local->hw.wiphy->bands[
457                                 ieee80211_get_sdata_band(sta->sdata)];
458                 brate = sband->bitrates[rate->idx].bitrate;
459                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
460         }
461         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
462                 rinfo->bw = RATE_INFO_BW_40;
463         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
464                 rinfo->bw = RATE_INFO_BW_80;
465         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
466                 rinfo->bw = RATE_INFO_BW_160;
467         else
468                 rinfo->bw = RATE_INFO_BW_20;
469         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
470                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
471 }
472 
473 void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
474 {
475         rinfo->flags = 0;
476 
477         if (sta->last_rx_rate_flag & RX_FLAG_HT) {
478                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
479                 rinfo->mcs = sta->last_rx_rate_idx;
480         } else if (sta->last_rx_rate_flag & RX_FLAG_VHT) {
481                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
482                 rinfo->nss = sta->last_rx_rate_vht_nss;
483                 rinfo->mcs = sta->last_rx_rate_idx;
484         } else {
485                 struct ieee80211_supported_band *sband;
486                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
487                 u16 brate;
488 
489                 sband = sta->local->hw.wiphy->bands[
490                                 ieee80211_get_sdata_band(sta->sdata)];
491                 brate = sband->bitrates[sta->last_rx_rate_idx].bitrate;
492                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
493         }
494 
495         if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
496                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
497 
498         if (sta->last_rx_rate_flag & RX_FLAG_5MHZ)
499                 rinfo->bw = RATE_INFO_BW_5;
500         else if (sta->last_rx_rate_flag & RX_FLAG_10MHZ)
501                 rinfo->bw = RATE_INFO_BW_10;
502         else if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
503                 rinfo->bw = RATE_INFO_BW_40;
504         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_80MHZ)
505                 rinfo->bw = RATE_INFO_BW_80;
506         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_160MHZ)
507                 rinfo->bw = RATE_INFO_BW_160;
508         else
509                 rinfo->bw = RATE_INFO_BW_20;
510 }
511 
512 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
513                                   int idx, u8 *mac, struct station_info *sinfo)
514 {
515         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
516         struct ieee80211_local *local = sdata->local;
517         struct sta_info *sta;
518         int ret = -ENOENT;
519 
520         mutex_lock(&local->sta_mtx);
521 
522         sta = sta_info_get_by_idx(sdata, idx);
523         if (sta) {
524                 ret = 0;
525                 memcpy(mac, sta->sta.addr, ETH_ALEN);
526                 sta_set_sinfo(sta, sinfo);
527         }
528 
529         mutex_unlock(&local->sta_mtx);
530 
531         return ret;
532 }
533 
534 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
535                                  int idx, struct survey_info *survey)
536 {
537         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
538 
539         return drv_get_survey(local, idx, survey);
540 }
541 
542 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
543                                  const u8 *mac, struct station_info *sinfo)
544 {
545         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
546         struct ieee80211_local *local = sdata->local;
547         struct sta_info *sta;
548         int ret = -ENOENT;
549 
550         mutex_lock(&local->sta_mtx);
551 
552         sta = sta_info_get_bss(sdata, mac);
553         if (sta) {
554                 ret = 0;
555                 sta_set_sinfo(sta, sinfo);
556         }
557 
558         mutex_unlock(&local->sta_mtx);
559 
560         return ret;
561 }
562 
563 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
564                                          struct cfg80211_chan_def *chandef)
565 {
566         struct ieee80211_local *local = wiphy_priv(wiphy);
567         struct ieee80211_sub_if_data *sdata;
568         int ret = 0;
569 
570         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
571                 return 0;
572 
573         mutex_lock(&local->mtx);
574         mutex_lock(&local->iflist_mtx);
575         if (local->use_chanctx) {
576                 sdata = rcu_dereference_protected(
577                                 local->monitor_sdata,
578                                 lockdep_is_held(&local->iflist_mtx));
579                 if (sdata) {
580                         ieee80211_vif_release_channel(sdata);
581                         ret = ieee80211_vif_use_channel(sdata, chandef,
582                                         IEEE80211_CHANCTX_EXCLUSIVE);
583                 }
584         } else if (local->open_count == local->monitors) {
585                 local->_oper_chandef = *chandef;
586                 ieee80211_hw_config(local, 0);
587         }
588 
589         if (ret == 0)
590                 local->monitor_chandef = *chandef;
591         mutex_unlock(&local->iflist_mtx);
592         mutex_unlock(&local->mtx);
593 
594         return ret;
595 }
596 
597 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
598                                     const u8 *resp, size_t resp_len,
599                                     const struct ieee80211_csa_settings *csa)
600 {
601         struct probe_resp *new, *old;
602 
603         if (!resp || !resp_len)
604                 return 1;
605 
606         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
607 
608         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
609         if (!new)
610                 return -ENOMEM;
611 
612         new->len = resp_len;
613         memcpy(new->data, resp, resp_len);
614 
615         if (csa)
616                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
617                        csa->n_counter_offsets_presp *
618                        sizeof(new->csa_counter_offsets[0]));
619 
620         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
621         if (old)
622                 kfree_rcu(old, rcu_head);
623 
624         return 0;
625 }
626 
627 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
628                                    struct cfg80211_beacon_data *params,
629                                    const struct ieee80211_csa_settings *csa)
630 {
631         struct beacon_data *new, *old;
632         int new_head_len, new_tail_len;
633         int size, err;
634         u32 changed = BSS_CHANGED_BEACON;
635 
636         old = sdata_dereference(sdata->u.ap.beacon, sdata);
637 
638 
639         /* Need to have a beacon head if we don't have one yet */
640         if (!params->head && !old)
641                 return -EINVAL;
642 
643         /* new or old head? */
644         if (params->head)
645                 new_head_len = params->head_len;
646         else
647                 new_head_len = old->head_len;
648 
649         /* new or old tail? */
650         if (params->tail || !old)
651                 /* params->tail_len will be zero for !params->tail */
652                 new_tail_len = params->tail_len;
653         else
654                 new_tail_len = old->tail_len;
655 
656         size = sizeof(*new) + new_head_len + new_tail_len;
657 
658         new = kzalloc(size, GFP_KERNEL);
659         if (!new)
660                 return -ENOMEM;
661 
662         /* start filling the new info now */
663 
664         /*
665          * pointers go into the block we allocated,
666          * memory is | beacon_data | head | tail |
667          */
668         new->head = ((u8 *) new) + sizeof(*new);
669         new->tail = new->head + new_head_len;
670         new->head_len = new_head_len;
671         new->tail_len = new_tail_len;
672 
673         if (csa) {
674                 new->csa_current_counter = csa->count;
675                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
676                        csa->n_counter_offsets_beacon *
677                        sizeof(new->csa_counter_offsets[0]));
678         }
679 
680         /* copy in head */
681         if (params->head)
682                 memcpy(new->head, params->head, new_head_len);
683         else
684                 memcpy(new->head, old->head, new_head_len);
685 
686         /* copy in optional tail */
687         if (params->tail)
688                 memcpy(new->tail, params->tail, new_tail_len);
689         else
690                 if (old)
691                         memcpy(new->tail, old->tail, new_tail_len);
692 
693         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
694                                        params->probe_resp_len, csa);
695         if (err < 0)
696                 return err;
697         if (err == 0)
698                 changed |= BSS_CHANGED_AP_PROBE_RESP;
699 
700         rcu_assign_pointer(sdata->u.ap.beacon, new);
701 
702         if (old)
703                 kfree_rcu(old, rcu_head);
704 
705         return changed;
706 }
707 
708 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
709                               struct cfg80211_ap_settings *params)
710 {
711         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
712         struct ieee80211_local *local = sdata->local;
713         struct beacon_data *old;
714         struct ieee80211_sub_if_data *vlan;
715         u32 changed = BSS_CHANGED_BEACON_INT |
716                       BSS_CHANGED_BEACON_ENABLED |
717                       BSS_CHANGED_BEACON |
718                       BSS_CHANGED_SSID |
719                       BSS_CHANGED_P2P_PS |
720                       BSS_CHANGED_TXPOWER;
721         int err;
722 
723         old = sdata_dereference(sdata->u.ap.beacon, sdata);
724         if (old)
725                 return -EALREADY;
726 
727         switch (params->smps_mode) {
728         case NL80211_SMPS_OFF:
729                 sdata->smps_mode = IEEE80211_SMPS_OFF;
730                 break;
731         case NL80211_SMPS_STATIC:
732                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
733                 break;
734         case NL80211_SMPS_DYNAMIC:
735                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
736                 break;
737         default:
738                 return -EINVAL;
739         }
740         sdata->needed_rx_chains = sdata->local->rx_chains;
741 
742         mutex_lock(&local->mtx);
743         err = ieee80211_vif_use_channel(sdata, &params->chandef,
744                                         IEEE80211_CHANCTX_SHARED);
745         if (!err)
746                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
747         mutex_unlock(&local->mtx);
748         if (err)
749                 return err;
750 
751         /*
752          * Apply control port protocol, this allows us to
753          * not encrypt dynamic WEP control frames.
754          */
755         sdata->control_port_protocol = params->crypto.control_port_ethertype;
756         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
757         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
758                                                         &params->crypto,
759                                                         sdata->vif.type);
760 
761         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
762                 vlan->control_port_protocol =
763                         params->crypto.control_port_ethertype;
764                 vlan->control_port_no_encrypt =
765                         params->crypto.control_port_no_encrypt;
766                 vlan->encrypt_headroom =
767                         ieee80211_cs_headroom(sdata->local,
768                                               &params->crypto,
769                                               vlan->vif.type);
770         }
771 
772         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
773         sdata->vif.bss_conf.dtim_period = params->dtim_period;
774         sdata->vif.bss_conf.enable_beacon = true;
775 
776         sdata->vif.bss_conf.ssid_len = params->ssid_len;
777         if (params->ssid_len)
778                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
779                        params->ssid_len);
780         sdata->vif.bss_conf.hidden_ssid =
781                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
782 
783         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
784                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
785         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
786                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
787         if (params->p2p_opp_ps)
788                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
789                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
790 
791         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
792         if (err < 0) {
793                 ieee80211_vif_release_channel(sdata);
794                 return err;
795         }
796         changed |= err;
797 
798         err = drv_start_ap(sdata->local, sdata);
799         if (err) {
800                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
801 
802                 if (old)
803                         kfree_rcu(old, rcu_head);
804                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
805                 ieee80211_vif_release_channel(sdata);
806                 return err;
807         }
808 
809         ieee80211_recalc_dtim(local, sdata);
810         ieee80211_bss_info_change_notify(sdata, changed);
811 
812         netif_carrier_on(dev);
813         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
814                 netif_carrier_on(vlan->dev);
815 
816         return 0;
817 }
818 
819 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
820                                    struct cfg80211_beacon_data *params)
821 {
822         struct ieee80211_sub_if_data *sdata;
823         struct beacon_data *old;
824         int err;
825 
826         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
827         sdata_assert_lock(sdata);
828 
829         /* don't allow changing the beacon while CSA is in place - offset
830          * of channel switch counter may change
831          */
832         if (sdata->vif.csa_active)
833                 return -EBUSY;
834 
835         old = sdata_dereference(sdata->u.ap.beacon, sdata);
836         if (!old)
837                 return -ENOENT;
838 
839         err = ieee80211_assign_beacon(sdata, params, NULL);
840         if (err < 0)
841                 return err;
842         ieee80211_bss_info_change_notify(sdata, err);
843         return 0;
844 }
845 
846 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
847 {
848         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
849         struct ieee80211_sub_if_data *vlan;
850         struct ieee80211_local *local = sdata->local;
851         struct beacon_data *old_beacon;
852         struct probe_resp *old_probe_resp;
853         struct cfg80211_chan_def chandef;
854 
855         sdata_assert_lock(sdata);
856 
857         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
858         if (!old_beacon)
859                 return -ENOENT;
860         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
861 
862         /* abort any running channel switch */
863         mutex_lock(&local->mtx);
864         sdata->vif.csa_active = false;
865         if (sdata->csa_block_tx) {
866                 ieee80211_wake_vif_queues(local, sdata,
867                                           IEEE80211_QUEUE_STOP_REASON_CSA);
868                 sdata->csa_block_tx = false;
869         }
870 
871         mutex_unlock(&local->mtx);
872 
873         kfree(sdata->u.ap.next_beacon);
874         sdata->u.ap.next_beacon = NULL;
875 
876         /* turn off carrier for this interface and dependent VLANs */
877         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
878                 netif_carrier_off(vlan->dev);
879         netif_carrier_off(dev);
880 
881         /* remove beacon and probe response */
882         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
883         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
884         kfree_rcu(old_beacon, rcu_head);
885         if (old_probe_resp)
886                 kfree_rcu(old_probe_resp, rcu_head);
887         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
888 
889         __sta_info_flush(sdata, true);
890         ieee80211_free_keys(sdata, true);
891 
892         sdata->vif.bss_conf.enable_beacon = false;
893         sdata->vif.bss_conf.ssid_len = 0;
894         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
895         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
896 
897         if (sdata->wdev.cac_started) {
898                 chandef = sdata->vif.bss_conf.chandef;
899                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
900                 cfg80211_cac_event(sdata->dev, &chandef,
901                                    NL80211_RADAR_CAC_ABORTED,
902                                    GFP_KERNEL);
903         }
904 
905         drv_stop_ap(sdata->local, sdata);
906 
907         /* free all potentially still buffered bcast frames */
908         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
909         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
910 
911         mutex_lock(&local->mtx);
912         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
913         ieee80211_vif_release_channel(sdata);
914         mutex_unlock(&local->mtx);
915 
916         return 0;
917 }
918 
919 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
920 struct iapp_layer2_update {
921         u8 da[ETH_ALEN];        /* broadcast */
922         u8 sa[ETH_ALEN];        /* STA addr */
923         __be16 len;             /* 6 */
924         u8 dsap;                /* 0 */
925         u8 ssap;                /* 0 */
926         u8 control;
927         u8 xid_info[3];
928 } __packed;
929 
930 static void ieee80211_send_layer2_update(struct sta_info *sta)
931 {
932         struct iapp_layer2_update *msg;
933         struct sk_buff *skb;
934 
935         /* Send Level 2 Update Frame to update forwarding tables in layer 2
936          * bridge devices */
937 
938         skb = dev_alloc_skb(sizeof(*msg));
939         if (!skb)
940                 return;
941         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
942 
943         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
944          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
945 
946         eth_broadcast_addr(msg->da);
947         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
948         msg->len = htons(6);
949         msg->dsap = 0;
950         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
951         msg->control = 0xaf;    /* XID response lsb.1111F101.
952                                  * F=0 (no poll command; unsolicited frame) */
953         msg->xid_info[0] = 0x81;        /* XID format identifier */
954         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
955         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
956 
957         skb->dev = sta->sdata->dev;
958         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
959         memset(skb->cb, 0, sizeof(skb->cb));
960         netif_rx_ni(skb);
961 }
962 
963 static int sta_apply_auth_flags(struct ieee80211_local *local,
964                                 struct sta_info *sta,
965                                 u32 mask, u32 set)
966 {
967         int ret;
968 
969         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
970             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
971             !test_sta_flag(sta, WLAN_STA_AUTH)) {
972                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
973                 if (ret)
974                         return ret;
975         }
976 
977         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
978             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
979             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
980                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
981                 if (ret)
982                         return ret;
983         }
984 
985         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
986                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
987                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
988                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
989                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
990                 else
991                         ret = 0;
992                 if (ret)
993                         return ret;
994         }
995 
996         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
997             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
998             test_sta_flag(sta, WLAN_STA_ASSOC)) {
999                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1000                 if (ret)
1001                         return ret;
1002         }
1003 
1004         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1005             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
1006             test_sta_flag(sta, WLAN_STA_AUTH)) {
1007                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
1008                 if (ret)
1009                         return ret;
1010         }
1011 
1012         return 0;
1013 }
1014 
1015 static int sta_apply_parameters(struct ieee80211_local *local,
1016                                 struct sta_info *sta,
1017                                 struct station_parameters *params)
1018 {
1019         int ret = 0;
1020         struct ieee80211_supported_band *sband;
1021         struct ieee80211_sub_if_data *sdata = sta->sdata;
1022         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1023         u32 mask, set;
1024 
1025         sband = local->hw.wiphy->bands[band];
1026 
1027         mask = params->sta_flags_mask;
1028         set = params->sta_flags_set;
1029 
1030         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1031                 /*
1032                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1033                  * API but must follow AUTHENTICATED for driver state.
1034                  */
1035                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1036                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1037                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1038                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1039         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1040                 /*
1041                  * TDLS -- everything follows authorized, but
1042                  * only becoming authorized is possible, not
1043                  * going back
1044                  */
1045                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1046                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1047                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1048                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1049                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1050                 }
1051         }
1052 
1053         /* auth flags will be set later for TDLS stations */
1054         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1055                 ret = sta_apply_auth_flags(local, sta, mask, set);
1056                 if (ret)
1057                         return ret;
1058         }
1059 
1060         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1061                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1062                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1063                 else
1064                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1065         }
1066 
1067         if (mask & BIT(NL80211_STA_FLAG_WME))
1068                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1069 
1070         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1071                 if (set & BIT(NL80211_STA_FLAG_MFP))
1072                         set_sta_flag(sta, WLAN_STA_MFP);
1073                 else
1074                         clear_sta_flag(sta, WLAN_STA_MFP);
1075         }
1076 
1077         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1078                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1079                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1080                 else
1081                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1082         }
1083 
1084         /* mark TDLS channel switch support, if the AP allows it */
1085         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1086             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1087             params->ext_capab_len >= 4 &&
1088             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1089                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1090 
1091         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1092                 sta->sta.uapsd_queues = params->uapsd_queues;
1093                 sta->sta.max_sp = params->max_sp;
1094         }
1095 
1096         /*
1097          * cfg80211 validates this (1-2007) and allows setting the AID
1098          * only when creating a new station entry
1099          */
1100         if (params->aid)
1101                 sta->sta.aid = params->aid;
1102 
1103         /*
1104          * Some of the following updates would be racy if called on an
1105          * existing station, via ieee80211_change_station(). However,
1106          * all such changes are rejected by cfg80211 except for updates
1107          * changing the supported rates on an existing but not yet used
1108          * TDLS peer.
1109          */
1110 
1111         if (params->listen_interval >= 0)
1112                 sta->listen_interval = params->listen_interval;
1113 
1114         if (params->supported_rates) {
1115                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1116                                          sband, params->supported_rates,
1117                                          params->supported_rates_len,
1118                                          &sta->sta.supp_rates[band]);
1119         }
1120 
1121         if (params->ht_capa)
1122                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1123                                                   params->ht_capa, sta);
1124 
1125         if (params->vht_capa)
1126                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1127                                                     params->vht_capa, sta);
1128 
1129         if (params->opmode_notif_used) {
1130                 /* returned value is only needed for rc update, but the
1131                  * rc isn't initialized here yet, so ignore it
1132                  */
1133                 __ieee80211_vht_handle_opmode(sdata, sta,
1134                                               params->opmode_notif,
1135                                               band, false);
1136         }
1137 
1138         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1139 #ifdef CONFIG_MAC80211_MESH
1140                 u32 changed = 0;
1141 
1142                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
1143                         switch (params->plink_state) {
1144                         case NL80211_PLINK_ESTAB:
1145                                 if (sta->plink_state != NL80211_PLINK_ESTAB)
1146                                         changed = mesh_plink_inc_estab_count(
1147                                                         sdata);
1148                                 sta->plink_state = params->plink_state;
1149 
1150                                 ieee80211_mps_sta_status_update(sta);
1151                                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1152                                               sdata->u.mesh.mshcfg.power_mode);
1153                                 break;
1154                         case NL80211_PLINK_LISTEN:
1155                         case NL80211_PLINK_BLOCKED:
1156                         case NL80211_PLINK_OPN_SNT:
1157                         case NL80211_PLINK_OPN_RCVD:
1158                         case NL80211_PLINK_CNF_RCVD:
1159                         case NL80211_PLINK_HOLDING:
1160                                 if (sta->plink_state == NL80211_PLINK_ESTAB)
1161                                         changed = mesh_plink_dec_estab_count(
1162                                                         sdata);
1163                                 sta->plink_state = params->plink_state;
1164 
1165                                 ieee80211_mps_sta_status_update(sta);
1166                                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1167                                                 NL80211_MESH_POWER_UNKNOWN);
1168                                 break;
1169                         default:
1170                                 /*  nothing  */
1171                                 break;
1172                         }
1173                 }
1174 
1175                 switch (params->plink_action) {
1176                 case NL80211_PLINK_ACTION_NO_ACTION:
1177                         /* nothing */
1178                         break;
1179                 case NL80211_PLINK_ACTION_OPEN:
1180                         changed |= mesh_plink_open(sta);
1181                         break;
1182                 case NL80211_PLINK_ACTION_BLOCK:
1183                         changed |= mesh_plink_block(sta);
1184                         break;
1185                 }
1186 
1187                 if (params->local_pm)
1188                         changed |=
1189                               ieee80211_mps_set_sta_local_pm(sta,
1190                                                              params->local_pm);
1191                 ieee80211_mbss_info_change_notify(sdata, changed);
1192 #endif
1193         }
1194 
1195         /* set the STA state after all sta info from usermode has been set */
1196         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1197                 ret = sta_apply_auth_flags(local, sta, mask, set);
1198                 if (ret)
1199                         return ret;
1200         }
1201 
1202         return 0;
1203 }
1204 
1205 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1206                                  const u8 *mac,
1207                                  struct station_parameters *params)
1208 {
1209         struct ieee80211_local *local = wiphy_priv(wiphy);
1210         struct sta_info *sta;
1211         struct ieee80211_sub_if_data *sdata;
1212         int err;
1213         int layer2_update;
1214 
1215         if (params->vlan) {
1216                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1217 
1218                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1219                     sdata->vif.type != NL80211_IFTYPE_AP)
1220                         return -EINVAL;
1221         } else
1222                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1223 
1224         if (ether_addr_equal(mac, sdata->vif.addr))
1225                 return -EINVAL;
1226 
1227         if (is_multicast_ether_addr(mac))
1228                 return -EINVAL;
1229 
1230         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1231         if (!sta)
1232                 return -ENOMEM;
1233 
1234         /*
1235          * defaults -- if userspace wants something else we'll
1236          * change it accordingly in sta_apply_parameters()
1237          */
1238         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) {
1239                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1240                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1241         } else {
1242                 sta->sta.tdls = true;
1243         }
1244 
1245         err = sta_apply_parameters(local, sta, params);
1246         if (err) {
1247                 sta_info_free(local, sta);
1248                 return err;
1249         }
1250 
1251         /*
1252          * for TDLS, rate control should be initialized only when
1253          * rates are known and station is marked authorized
1254          */
1255         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1256                 rate_control_rate_init(sta);
1257 
1258         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1259                 sdata->vif.type == NL80211_IFTYPE_AP;
1260 
1261         err = sta_info_insert_rcu(sta);
1262         if (err) {
1263                 rcu_read_unlock();
1264                 return err;
1265         }
1266 
1267         if (layer2_update)
1268                 ieee80211_send_layer2_update(sta);
1269 
1270         rcu_read_unlock();
1271 
1272         return 0;
1273 }
1274 
1275 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1276                                  struct station_del_parameters *params)
1277 {
1278         struct ieee80211_sub_if_data *sdata;
1279 
1280         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1281 
1282         if (params->mac)
1283                 return sta_info_destroy_addr_bss(sdata, params->mac);
1284 
1285         sta_info_flush(sdata);
1286         return 0;
1287 }
1288 
1289 static int ieee80211_change_station(struct wiphy *wiphy,
1290                                     struct net_device *dev, const u8 *mac,
1291                                     struct station_parameters *params)
1292 {
1293         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1294         struct ieee80211_local *local = wiphy_priv(wiphy);
1295         struct sta_info *sta;
1296         struct ieee80211_sub_if_data *vlansdata;
1297         enum cfg80211_station_type statype;
1298         int err;
1299 
1300         mutex_lock(&local->sta_mtx);
1301 
1302         sta = sta_info_get_bss(sdata, mac);
1303         if (!sta) {
1304                 err = -ENOENT;
1305                 goto out_err;
1306         }
1307 
1308         switch (sdata->vif.type) {
1309         case NL80211_IFTYPE_MESH_POINT:
1310                 if (sdata->u.mesh.user_mpm)
1311                         statype = CFG80211_STA_MESH_PEER_USER;
1312                 else
1313                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1314                 break;
1315         case NL80211_IFTYPE_ADHOC:
1316                 statype = CFG80211_STA_IBSS;
1317                 break;
1318         case NL80211_IFTYPE_STATION:
1319                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1320                         statype = CFG80211_STA_AP_STA;
1321                         break;
1322                 }
1323                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1324                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1325                 else
1326                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1327                 break;
1328         case NL80211_IFTYPE_AP:
1329         case NL80211_IFTYPE_AP_VLAN:
1330                 statype = CFG80211_STA_AP_CLIENT;
1331                 break;
1332         default:
1333                 err = -EOPNOTSUPP;
1334                 goto out_err;
1335         }
1336 
1337         err = cfg80211_check_station_change(wiphy, params, statype);
1338         if (err)
1339                 goto out_err;
1340 
1341         if (params->vlan && params->vlan != sta->sdata->dev) {
1342                 bool prev_4addr = false;
1343                 bool new_4addr = false;
1344 
1345                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1346 
1347                 if (params->vlan->ieee80211_ptr->use_4addr) {
1348                         if (vlansdata->u.vlan.sta) {
1349                                 err = -EBUSY;
1350                                 goto out_err;
1351                         }
1352 
1353                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1354                         new_4addr = true;
1355                 }
1356 
1357                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1358                     sta->sdata->u.vlan.sta) {
1359                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1360                         prev_4addr = true;
1361                 }
1362 
1363                 sta->sdata = vlansdata;
1364 
1365                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1366                     prev_4addr != new_4addr) {
1367                         if (new_4addr)
1368                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1369                         else
1370                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1371                 }
1372 
1373                 ieee80211_send_layer2_update(sta);
1374         }
1375 
1376         err = sta_apply_parameters(local, sta, params);
1377         if (err)
1378                 goto out_err;
1379 
1380         /* When peer becomes authorized, init rate control as well */
1381         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1382             test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1383                 rate_control_rate_init(sta);
1384 
1385         mutex_unlock(&local->sta_mtx);
1386 
1387         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1388              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1389             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1390             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1391             sta_info_tx_streams(sta) != 1) {
1392                 ht_dbg(sta->sdata,
1393                        "%pM just authorized and MIMO capable - update SMPS\n",
1394                        sta->sta.addr);
1395                 ieee80211_send_smps_action(sta->sdata,
1396                         sta->sdata->bss->req_smps,
1397                         sta->sta.addr,
1398                         sta->sdata->vif.bss_conf.bssid);
1399         }
1400 
1401         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1402             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1403                 ieee80211_recalc_ps(local, -1);
1404                 ieee80211_recalc_ps_vif(sdata);
1405         }
1406 
1407         return 0;
1408 out_err:
1409         mutex_unlock(&local->sta_mtx);
1410         return err;
1411 }
1412 
1413 #ifdef CONFIG_MAC80211_MESH
1414 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1415                                const u8 *dst, const u8 *next_hop)
1416 {
1417         struct ieee80211_sub_if_data *sdata;
1418         struct mesh_path *mpath;
1419         struct sta_info *sta;
1420 
1421         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1422 
1423         rcu_read_lock();
1424         sta = sta_info_get(sdata, next_hop);
1425         if (!sta) {
1426                 rcu_read_unlock();
1427                 return -ENOENT;
1428         }
1429 
1430         mpath = mesh_path_add(sdata, dst);
1431         if (IS_ERR(mpath)) {
1432                 rcu_read_unlock();
1433                 return PTR_ERR(mpath);
1434         }
1435 
1436         mesh_path_fix_nexthop(mpath, sta);
1437 
1438         rcu_read_unlock();
1439         return 0;
1440 }
1441 
1442 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1443                                const u8 *dst)
1444 {
1445         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1446 
1447         if (dst)
1448                 return mesh_path_del(sdata, dst);
1449 
1450         mesh_path_flush_by_iface(sdata);
1451         return 0;
1452 }
1453 
1454 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1455                                   const u8 *dst, const u8 *next_hop)
1456 {
1457         struct ieee80211_sub_if_data *sdata;
1458         struct mesh_path *mpath;
1459         struct sta_info *sta;
1460 
1461         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1462 
1463         rcu_read_lock();
1464 
1465         sta = sta_info_get(sdata, next_hop);
1466         if (!sta) {
1467                 rcu_read_unlock();
1468                 return -ENOENT;
1469         }
1470 
1471         mpath = mesh_path_lookup(sdata, dst);
1472         if (!mpath) {
1473                 rcu_read_unlock();
1474                 return -ENOENT;
1475         }
1476 
1477         mesh_path_fix_nexthop(mpath, sta);
1478 
1479         rcu_read_unlock();
1480         return 0;
1481 }
1482 
1483 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1484                             struct mpath_info *pinfo)
1485 {
1486         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1487 
1488         if (next_hop_sta)
1489                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1490         else
1491                 memset(next_hop, 0, ETH_ALEN);
1492 
1493         memset(pinfo, 0, sizeof(*pinfo));
1494 
1495         pinfo->generation = mesh_paths_generation;
1496 
1497         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1498                         MPATH_INFO_SN |
1499                         MPATH_INFO_METRIC |
1500                         MPATH_INFO_EXPTIME |
1501                         MPATH_INFO_DISCOVERY_TIMEOUT |
1502                         MPATH_INFO_DISCOVERY_RETRIES |
1503                         MPATH_INFO_FLAGS;
1504 
1505         pinfo->frame_qlen = mpath->frame_queue.qlen;
1506         pinfo->sn = mpath->sn;
1507         pinfo->metric = mpath->metric;
1508         if (time_before(jiffies, mpath->exp_time))
1509                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1510         pinfo->discovery_timeout =
1511                         jiffies_to_msecs(mpath->discovery_timeout);
1512         pinfo->discovery_retries = mpath->discovery_retries;
1513         if (mpath->flags & MESH_PATH_ACTIVE)
1514                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1515         if (mpath->flags & MESH_PATH_RESOLVING)
1516                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1517         if (mpath->flags & MESH_PATH_SN_VALID)
1518                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1519         if (mpath->flags & MESH_PATH_FIXED)
1520                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1521         if (mpath->flags & MESH_PATH_RESOLVED)
1522                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1523 }
1524 
1525 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1526                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1527 
1528 {
1529         struct ieee80211_sub_if_data *sdata;
1530         struct mesh_path *mpath;
1531 
1532         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1533 
1534         rcu_read_lock();
1535         mpath = mesh_path_lookup(sdata, dst);
1536         if (!mpath) {
1537                 rcu_read_unlock();
1538                 return -ENOENT;
1539         }
1540         memcpy(dst, mpath->dst, ETH_ALEN);
1541         mpath_set_pinfo(mpath, next_hop, pinfo);
1542         rcu_read_unlock();
1543         return 0;
1544 }
1545 
1546 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1547                                 int idx, u8 *dst, u8 *next_hop,
1548                                 struct mpath_info *pinfo)
1549 {
1550         struct ieee80211_sub_if_data *sdata;
1551         struct mesh_path *mpath;
1552 
1553         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1554 
1555         rcu_read_lock();
1556         mpath = mesh_path_lookup_by_idx(sdata, idx);
1557         if (!mpath) {
1558                 rcu_read_unlock();
1559                 return -ENOENT;
1560         }
1561         memcpy(dst, mpath->dst, ETH_ALEN);
1562         mpath_set_pinfo(mpath, next_hop, pinfo);
1563         rcu_read_unlock();
1564         return 0;
1565 }
1566 
1567 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1568                           struct mpath_info *pinfo)
1569 {
1570         memset(pinfo, 0, sizeof(*pinfo));
1571         memcpy(mpp, mpath->mpp, ETH_ALEN);
1572 
1573         pinfo->generation = mpp_paths_generation;
1574 }
1575 
1576 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1577                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1578 
1579 {
1580         struct ieee80211_sub_if_data *sdata;
1581         struct mesh_path *mpath;
1582 
1583         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1584 
1585         rcu_read_lock();
1586         mpath = mpp_path_lookup(sdata, dst);
1587         if (!mpath) {
1588                 rcu_read_unlock();
1589                 return -ENOENT;
1590         }
1591         memcpy(dst, mpath->dst, ETH_ALEN);
1592         mpp_set_pinfo(mpath, mpp, pinfo);
1593         rcu_read_unlock();
1594         return 0;
1595 }
1596 
1597 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1598                               int idx, u8 *dst, u8 *mpp,
1599                               struct mpath_info *pinfo)
1600 {
1601         struct ieee80211_sub_if_data *sdata;
1602         struct mesh_path *mpath;
1603 
1604         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1605 
1606         rcu_read_lock();
1607         mpath = mpp_path_lookup_by_idx(sdata, idx);
1608         if (!mpath) {
1609                 rcu_read_unlock();
1610                 return -ENOENT;
1611         }
1612         memcpy(dst, mpath->dst, ETH_ALEN);
1613         mpp_set_pinfo(mpath, mpp, pinfo);
1614         rcu_read_unlock();
1615         return 0;
1616 }
1617 
1618 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1619                                 struct net_device *dev,
1620                                 struct mesh_config *conf)
1621 {
1622         struct ieee80211_sub_if_data *sdata;
1623         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1624 
1625         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1626         return 0;
1627 }
1628 
1629 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1630 {
1631         return (mask >> (parm-1)) & 0x1;
1632 }
1633 
1634 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1635                 const struct mesh_setup *setup)
1636 {
1637         u8 *new_ie;
1638         const u8 *old_ie;
1639         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1640                                         struct ieee80211_sub_if_data, u.mesh);
1641 
1642         /* allocate information elements */
1643         new_ie = NULL;
1644         old_ie = ifmsh->ie;
1645 
1646         if (setup->ie_len) {
1647                 new_ie = kmemdup(setup->ie, setup->ie_len,
1648                                 GFP_KERNEL);
1649                 if (!new_ie)
1650                         return -ENOMEM;
1651         }
1652         ifmsh->ie_len = setup->ie_len;
1653         ifmsh->ie = new_ie;
1654         kfree(old_ie);
1655 
1656         /* now copy the rest of the setup parameters */
1657         ifmsh->mesh_id_len = setup->mesh_id_len;
1658         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1659         ifmsh->mesh_sp_id = setup->sync_method;
1660         ifmsh->mesh_pp_id = setup->path_sel_proto;
1661         ifmsh->mesh_pm_id = setup->path_metric;
1662         ifmsh->user_mpm = setup->user_mpm;
1663         ifmsh->mesh_auth_id = setup->auth_id;
1664         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1665         if (setup->is_authenticated)
1666                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1667         if (setup->is_secure)
1668                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1669 
1670         /* mcast rate setting in Mesh Node */
1671         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1672                                                 sizeof(setup->mcast_rate));
1673         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1674 
1675         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1676         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1677 
1678         return 0;
1679 }
1680 
1681 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1682                                         struct net_device *dev, u32 mask,
1683                                         const struct mesh_config *nconf)
1684 {
1685         struct mesh_config *conf;
1686         struct ieee80211_sub_if_data *sdata;
1687         struct ieee80211_if_mesh *ifmsh;
1688 
1689         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1690         ifmsh = &sdata->u.mesh;
1691 
1692         /* Set the config options which we are interested in setting */
1693         conf = &(sdata->u.mesh.mshcfg);
1694         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1695                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1696         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1697                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1698         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1699                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1700         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1701                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1702         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1703                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1704         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1705                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1706         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1707                 conf->element_ttl = nconf->element_ttl;
1708         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1709                 if (ifmsh->user_mpm)
1710                         return -EBUSY;
1711                 conf->auto_open_plinks = nconf->auto_open_plinks;
1712         }
1713         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1714                 conf->dot11MeshNbrOffsetMaxNeighbor =
1715                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1716         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1717                 conf->dot11MeshHWMPmaxPREQretries =
1718                         nconf->dot11MeshHWMPmaxPREQretries;
1719         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1720                 conf->path_refresh_time = nconf->path_refresh_time;
1721         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1722                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1723         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1724                 conf->dot11MeshHWMPactivePathTimeout =
1725                         nconf->dot11MeshHWMPactivePathTimeout;
1726         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1727                 conf->dot11MeshHWMPpreqMinInterval =
1728                         nconf->dot11MeshHWMPpreqMinInterval;
1729         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1730                 conf->dot11MeshHWMPperrMinInterval =
1731                         nconf->dot11MeshHWMPperrMinInterval;
1732         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1733                            mask))
1734                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1735                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1736         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1737                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1738                 ieee80211_mesh_root_setup(ifmsh);
1739         }
1740         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1741                 /* our current gate announcement implementation rides on root
1742                  * announcements, so require this ifmsh to also be a root node
1743                  * */
1744                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1745                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1746                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1747                         ieee80211_mesh_root_setup(ifmsh);
1748                 }
1749                 conf->dot11MeshGateAnnouncementProtocol =
1750                         nconf->dot11MeshGateAnnouncementProtocol;
1751         }
1752         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1753                 conf->dot11MeshHWMPRannInterval =
1754                         nconf->dot11MeshHWMPRannInterval;
1755         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1756                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1757         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1758                 /* our RSSI threshold implementation is supported only for
1759                  * devices that report signal in dBm.
1760                  */
1761                 if (!(sdata->local->hw.flags & IEEE80211_HW_SIGNAL_DBM))
1762                         return -ENOTSUPP;
1763                 conf->rssi_threshold = nconf->rssi_threshold;
1764         }
1765         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1766                 conf->ht_opmode = nconf->ht_opmode;
1767                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1768                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1769         }
1770         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1771                 conf->dot11MeshHWMPactivePathToRootTimeout =
1772                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1773         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1774                 conf->dot11MeshHWMProotInterval =
1775                         nconf->dot11MeshHWMProotInterval;
1776         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1777                 conf->dot11MeshHWMPconfirmationInterval =
1778                         nconf->dot11MeshHWMPconfirmationInterval;
1779         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1780                 conf->power_mode = nconf->power_mode;
1781                 ieee80211_mps_local_status_update(sdata);
1782         }
1783         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1784                 conf->dot11MeshAwakeWindowDuration =
1785                         nconf->dot11MeshAwakeWindowDuration;
1786         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1787                 conf->plink_timeout = nconf->plink_timeout;
1788         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1789         return 0;
1790 }
1791 
1792 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1793                                const struct mesh_config *conf,
1794                                const struct mesh_setup *setup)
1795 {
1796         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1797         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1798         int err;
1799 
1800         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1801         err = copy_mesh_setup(ifmsh, setup);
1802         if (err)
1803                 return err;
1804 
1805         /* can mesh use other SMPS modes? */
1806         sdata->smps_mode = IEEE80211_SMPS_OFF;
1807         sdata->needed_rx_chains = sdata->local->rx_chains;
1808 
1809         mutex_lock(&sdata->local->mtx);
1810         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1811                                         IEEE80211_CHANCTX_SHARED);
1812         mutex_unlock(&sdata->local->mtx);
1813         if (err)
1814                 return err;
1815 
1816         return ieee80211_start_mesh(sdata);
1817 }
1818 
1819 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1820 {
1821         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1822 
1823         ieee80211_stop_mesh(sdata);
1824         mutex_lock(&sdata->local->mtx);
1825         ieee80211_vif_release_channel(sdata);
1826         mutex_unlock(&sdata->local->mtx);
1827 
1828         return 0;
1829 }
1830 #endif
1831 
1832 static int ieee80211_change_bss(struct wiphy *wiphy,
1833                                 struct net_device *dev,
1834                                 struct bss_parameters *params)
1835 {
1836         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1837         enum ieee80211_band band;
1838         u32 changed = 0;
1839 
1840         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1841                 return -ENOENT;
1842 
1843         band = ieee80211_get_sdata_band(sdata);
1844 
1845         if (params->use_cts_prot >= 0) {
1846                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1847                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1848         }
1849         if (params->use_short_preamble >= 0) {
1850                 sdata->vif.bss_conf.use_short_preamble =
1851                         params->use_short_preamble;
1852                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1853         }
1854 
1855         if (!sdata->vif.bss_conf.use_short_slot &&
1856             band == IEEE80211_BAND_5GHZ) {
1857                 sdata->vif.bss_conf.use_short_slot = true;
1858                 changed |= BSS_CHANGED_ERP_SLOT;
1859         }
1860 
1861         if (params->use_short_slot_time >= 0) {
1862                 sdata->vif.bss_conf.use_short_slot =
1863                         params->use_short_slot_time;
1864                 changed |= BSS_CHANGED_ERP_SLOT;
1865         }
1866 
1867         if (params->basic_rates) {
1868                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1869                                          wiphy->bands[band],
1870                                          params->basic_rates,
1871                                          params->basic_rates_len,
1872                                          &sdata->vif.bss_conf.basic_rates);
1873                 changed |= BSS_CHANGED_BASIC_RATES;
1874         }
1875 
1876         if (params->ap_isolate >= 0) {
1877                 if (params->ap_isolate)
1878                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1879                 else
1880                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1881         }
1882 
1883         if (params->ht_opmode >= 0) {
1884                 sdata->vif.bss_conf.ht_operation_mode =
1885                         (u16) params->ht_opmode;
1886                 changed |= BSS_CHANGED_HT;
1887         }
1888 
1889         if (params->p2p_ctwindow >= 0) {
1890                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1891                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1892                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1893                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1894                 changed |= BSS_CHANGED_P2P_PS;
1895         }
1896 
1897         if (params->p2p_opp_ps > 0) {
1898                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1899                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1900                 changed |= BSS_CHANGED_P2P_PS;
1901         } else if (params->p2p_opp_ps == 0) {
1902                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1903                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1904                 changed |= BSS_CHANGED_P2P_PS;
1905         }
1906 
1907         ieee80211_bss_info_change_notify(sdata, changed);
1908 
1909         return 0;
1910 }
1911 
1912 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1913                                     struct net_device *dev,
1914                                     struct ieee80211_txq_params *params)
1915 {
1916         struct ieee80211_local *local = wiphy_priv(wiphy);
1917         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1918         struct ieee80211_tx_queue_params p;
1919 
1920         if (!local->ops->conf_tx)
1921                 return -EOPNOTSUPP;
1922 
1923         if (local->hw.queues < IEEE80211_NUM_ACS)
1924                 return -EOPNOTSUPP;
1925 
1926         memset(&p, 0, sizeof(p));
1927         p.aifs = params->aifs;
1928         p.cw_max = params->cwmax;
1929         p.cw_min = params->cwmin;
1930         p.txop = params->txop;
1931 
1932         /*
1933          * Setting tx queue params disables u-apsd because it's only
1934          * called in master mode.
1935          */
1936         p.uapsd = false;
1937 
1938         sdata->tx_conf[params->ac] = p;
1939         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1940                 wiphy_debug(local->hw.wiphy,
1941                             "failed to set TX queue parameters for AC %d\n",
1942                             params->ac);
1943                 return -EINVAL;
1944         }
1945 
1946         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1947 
1948         return 0;
1949 }
1950 
1951 #ifdef CONFIG_PM
1952 static int ieee80211_suspend(struct wiphy *wiphy,
1953                              struct cfg80211_wowlan *wowlan)
1954 {
1955         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1956 }
1957 
1958 static int ieee80211_resume(struct wiphy *wiphy)
1959 {
1960         return __ieee80211_resume(wiphy_priv(wiphy));
1961 }
1962 #else
1963 #define ieee80211_suspend NULL
1964 #define ieee80211_resume NULL
1965 #endif
1966 
1967 static int ieee80211_scan(struct wiphy *wiphy,
1968                           struct cfg80211_scan_request *req)
1969 {
1970         struct ieee80211_sub_if_data *sdata;
1971 
1972         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1973 
1974         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1975         case NL80211_IFTYPE_STATION:
1976         case NL80211_IFTYPE_ADHOC:
1977         case NL80211_IFTYPE_MESH_POINT:
1978         case NL80211_IFTYPE_P2P_CLIENT:
1979         case NL80211_IFTYPE_P2P_DEVICE:
1980                 break;
1981         case NL80211_IFTYPE_P2P_GO:
1982                 if (sdata->local->ops->hw_scan)
1983                         break;
1984                 /*
1985                  * FIXME: implement NoA while scanning in software,
1986                  * for now fall through to allow scanning only when
1987                  * beaconing hasn't been configured yet
1988                  */
1989         case NL80211_IFTYPE_AP:
1990                 /*
1991                  * If the scan has been forced (and the driver supports
1992                  * forcing), don't care about being beaconing already.
1993                  * This will create problems to the attached stations (e.g. all
1994                  * the  frames sent while scanning on other channel will be
1995                  * lost)
1996                  */
1997                 if (sdata->u.ap.beacon &&
1998                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
1999                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2000                         return -EOPNOTSUPP;
2001                 break;
2002         default:
2003                 return -EOPNOTSUPP;
2004         }
2005 
2006         return ieee80211_request_scan(sdata, req);
2007 }
2008 
2009 static int
2010 ieee80211_sched_scan_start(struct wiphy *wiphy,
2011                            struct net_device *dev,
2012                            struct cfg80211_sched_scan_request *req)
2013 {
2014         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2015 
2016         if (!sdata->local->ops->sched_scan_start)
2017                 return -EOPNOTSUPP;
2018 
2019         return ieee80211_request_sched_scan_start(sdata, req);
2020 }
2021 
2022 static int
2023 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2024 {
2025         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2026 
2027         if (!sdata->local->ops->sched_scan_stop)
2028                 return -EOPNOTSUPP;
2029 
2030         return ieee80211_request_sched_scan_stop(sdata);
2031 }
2032 
2033 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2034                           struct cfg80211_auth_request *req)
2035 {
2036         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2037 }
2038 
2039 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2040                            struct cfg80211_assoc_request *req)
2041 {
2042         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2043 }
2044 
2045 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2046                             struct cfg80211_deauth_request *req)
2047 {
2048         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2049 }
2050 
2051 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2052                               struct cfg80211_disassoc_request *req)
2053 {
2054         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2055 }
2056 
2057 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2058                                struct cfg80211_ibss_params *params)
2059 {
2060         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2061 }
2062 
2063 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2064 {
2065         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2066 }
2067 
2068 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2069                               struct ocb_setup *setup)
2070 {
2071         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2072 }
2073 
2074 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2075 {
2076         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2077 }
2078 
2079 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2080                                     int rate[IEEE80211_NUM_BANDS])
2081 {
2082         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2083 
2084         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2085                sizeof(int) * IEEE80211_NUM_BANDS);
2086 
2087         return 0;
2088 }
2089 
2090 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2091 {
2092         struct ieee80211_local *local = wiphy_priv(wiphy);
2093         int err;
2094 
2095         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2096                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2097 
2098                 if (err)
2099                         return err;
2100         }
2101 
2102         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2103             (changed & WIPHY_PARAM_DYN_ACK)) {
2104                 s16 coverage_class;
2105 
2106                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2107                                         wiphy->coverage_class : -1;
2108                 err = drv_set_coverage_class(local, coverage_class);
2109 
2110                 if (err)
2111                         return err;
2112         }
2113 
2114         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2115                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2116 
2117                 if (err)
2118                         return err;
2119         }
2120 
2121         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2122                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2123                         return -EINVAL;
2124                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2125         }
2126         if (changed & WIPHY_PARAM_RETRY_LONG) {
2127                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2128                         return -EINVAL;
2129                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2130         }
2131         if (changed &
2132             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2133                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2134 
2135         return 0;
2136 }
2137 
2138 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2139                                   struct wireless_dev *wdev,
2140                                   enum nl80211_tx_power_setting type, int mbm)
2141 {
2142         struct ieee80211_local *local = wiphy_priv(wiphy);
2143         struct ieee80211_sub_if_data *sdata;
2144         enum nl80211_tx_power_setting txp_type = type;
2145         bool update_txp_type = false;
2146 
2147         if (wdev) {
2148                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2149 
2150                 switch (type) {
2151                 case NL80211_TX_POWER_AUTOMATIC:
2152                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2153                         txp_type = NL80211_TX_POWER_LIMITED;
2154                         break;
2155                 case NL80211_TX_POWER_LIMITED:
2156                 case NL80211_TX_POWER_FIXED:
2157                         if (mbm < 0 || (mbm % 100))
2158                                 return -EOPNOTSUPP;
2159                         sdata->user_power_level = MBM_TO_DBM(mbm);
2160                         break;
2161                 }
2162 
2163                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2164                         update_txp_type = true;
2165                         sdata->vif.bss_conf.txpower_type = txp_type;
2166                 }
2167 
2168                 ieee80211_recalc_txpower(sdata, update_txp_type);
2169 
2170                 return 0;
2171         }
2172 
2173         switch (type) {
2174         case NL80211_TX_POWER_AUTOMATIC:
2175                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2176                 txp_type = NL80211_TX_POWER_LIMITED;
2177                 break;
2178         case NL80211_TX_POWER_LIMITED:
2179         case NL80211_TX_POWER_FIXED:
2180                 if (mbm < 0 || (mbm % 100))
2181                         return -EOPNOTSUPP;
2182                 local->user_power_level = MBM_TO_DBM(mbm);
2183                 break;
2184         }
2185 
2186         mutex_lock(&local->iflist_mtx);
2187         list_for_each_entry(sdata, &local->interfaces, list) {
2188                 sdata->user_power_level = local->user_power_level;
2189                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2190                         update_txp_type = true;
2191                 sdata->vif.bss_conf.txpower_type = txp_type;
2192         }
2193         list_for_each_entry(sdata, &local->interfaces, list)
2194                 ieee80211_recalc_txpower(sdata, update_txp_type);
2195         mutex_unlock(&local->iflist_mtx);
2196 
2197         return 0;
2198 }
2199 
2200 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2201                                   struct wireless_dev *wdev,
2202                                   int *dbm)
2203 {
2204         struct ieee80211_local *local = wiphy_priv(wiphy);
2205         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2206 
2207         if (local->ops->get_txpower)
2208                 return drv_get_txpower(local, sdata, dbm);
2209 
2210         if (!local->use_chanctx)
2211                 *dbm = local->hw.conf.power_level;
2212         else
2213                 *dbm = sdata->vif.bss_conf.txpower;
2214 
2215         return 0;
2216 }
2217 
2218 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2219                                   const u8 *addr)
2220 {
2221         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2222 
2223         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2224 
2225         return 0;
2226 }
2227 
2228 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2229 {
2230         struct ieee80211_local *local = wiphy_priv(wiphy);
2231 
2232         drv_rfkill_poll(local);
2233 }
2234 
2235 #ifdef CONFIG_NL80211_TESTMODE
2236 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2237                                   struct wireless_dev *wdev,
2238                                   void *data, int len)
2239 {
2240         struct ieee80211_local *local = wiphy_priv(wiphy);
2241         struct ieee80211_vif *vif = NULL;
2242 
2243         if (!local->ops->testmode_cmd)
2244                 return -EOPNOTSUPP;
2245 
2246         if (wdev) {
2247                 struct ieee80211_sub_if_data *sdata;
2248 
2249                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2250                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2251                         vif = &sdata->vif;
2252         }
2253 
2254         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2255 }
2256 
2257 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2258                                    struct sk_buff *skb,
2259                                    struct netlink_callback *cb,
2260                                    void *data, int len)
2261 {
2262         struct ieee80211_local *local = wiphy_priv(wiphy);
2263 
2264         if (!local->ops->testmode_dump)
2265                 return -EOPNOTSUPP;
2266 
2267         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2268 }
2269 #endif
2270 
2271 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2272                                 enum ieee80211_smps_mode smps_mode)
2273 {
2274         struct sta_info *sta;
2275         enum ieee80211_smps_mode old_req;
2276         int i;
2277 
2278         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2279                 return -EINVAL;
2280 
2281         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2282                 return 0;
2283 
2284         old_req = sdata->u.ap.req_smps;
2285         sdata->u.ap.req_smps = smps_mode;
2286 
2287         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2288         if (old_req == smps_mode ||
2289             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2290                 return 0;
2291 
2292          /* If no associated stations, there's no need to do anything */
2293         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2294                 sdata->smps_mode = smps_mode;
2295                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2296                 return 0;
2297         }
2298 
2299         ht_dbg(sdata,
2300                "SMSP %d requested in AP mode, sending Action frame to %d stations\n",
2301                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2302 
2303         mutex_lock(&sdata->local->sta_mtx);
2304         for (i = 0; i < STA_HASH_SIZE; i++) {
2305                 for (sta = rcu_dereference_protected(sdata->local->sta_hash[i],
2306                                 lockdep_is_held(&sdata->local->sta_mtx));
2307                      sta;
2308                      sta = rcu_dereference_protected(sta->hnext,
2309                                 lockdep_is_held(&sdata->local->sta_mtx))) {
2310                         /*
2311                          * Only stations associated to our AP and
2312                          * associated VLANs
2313                          */
2314                         if (sta->sdata->bss != &sdata->u.ap)
2315                                 continue;
2316 
2317                         /* This station doesn't support MIMO - skip it */
2318                         if (sta_info_tx_streams(sta) == 1)
2319                                 continue;
2320 
2321                         /*
2322                          * Don't wake up a STA just to send the action frame
2323                          * unless we are getting more restrictive.
2324                          */
2325                         if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2326                             !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2327                                                            smps_mode)) {
2328                                 ht_dbg(sdata,
2329                                        "Won't send SMPS to sleeping STA %pM\n",
2330                                        sta->sta.addr);
2331                                 continue;
2332                         }
2333 
2334                         /*
2335                          * If the STA is not authorized, wait until it gets
2336                          * authorized and the action frame will be sent then.
2337                          */
2338                         if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2339                                 continue;
2340 
2341                         ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2342                         ieee80211_send_smps_action(sdata, smps_mode,
2343                                                    sta->sta.addr,
2344                                                    sdata->vif.bss_conf.bssid);
2345                 }
2346         }
2347         mutex_unlock(&sdata->local->sta_mtx);
2348 
2349         sdata->smps_mode = smps_mode;
2350         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2351 
2352         return 0;
2353 }
2354 
2355 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2356                                  enum ieee80211_smps_mode smps_mode)
2357 {
2358         const u8 *ap;
2359         enum ieee80211_smps_mode old_req;
2360         int err;
2361 
2362         lockdep_assert_held(&sdata->wdev.mtx);
2363 
2364         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2365                 return -EINVAL;
2366 
2367         old_req = sdata->u.mgd.req_smps;
2368         sdata->u.mgd.req_smps = smps_mode;
2369 
2370         if (old_req == smps_mode &&
2371             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2372                 return 0;
2373 
2374         /*
2375          * If not associated, or current association is not an HT
2376          * association, there's no need to do anything, just store
2377          * the new value until we associate.
2378          */
2379         if (!sdata->u.mgd.associated ||
2380             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2381                 return 0;
2382 
2383         ap = sdata->u.mgd.associated->bssid;
2384 
2385         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2386                 if (sdata->u.mgd.powersave)
2387                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2388                 else
2389                         smps_mode = IEEE80211_SMPS_OFF;
2390         }
2391 
2392         /* send SM PS frame to AP */
2393         err = ieee80211_send_smps_action(sdata, smps_mode,
2394                                          ap, ap);
2395         if (err)
2396                 sdata->u.mgd.req_smps = old_req;
2397 
2398         return err;
2399 }
2400 
2401 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2402                                     bool enabled, int timeout)
2403 {
2404         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2405         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2406 
2407         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2408                 return -EOPNOTSUPP;
2409 
2410         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
2411                 return -EOPNOTSUPP;
2412 
2413         if (enabled == sdata->u.mgd.powersave &&
2414             timeout == local->dynamic_ps_forced_timeout)
2415                 return 0;
2416 
2417         sdata->u.mgd.powersave = enabled;
2418         local->dynamic_ps_forced_timeout = timeout;
2419 
2420         /* no change, but if automatic follow powersave */
2421         sdata_lock(sdata);
2422         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2423         sdata_unlock(sdata);
2424 
2425         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
2426                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2427 
2428         ieee80211_recalc_ps(local, -1);
2429         ieee80211_recalc_ps_vif(sdata);
2430 
2431         return 0;
2432 }
2433 
2434 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2435                                          struct net_device *dev,
2436                                          s32 rssi_thold, u32 rssi_hyst)
2437 {
2438         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2439         struct ieee80211_vif *vif = &sdata->vif;
2440         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2441 
2442         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2443             rssi_hyst == bss_conf->cqm_rssi_hyst)
2444                 return 0;
2445 
2446         bss_conf->cqm_rssi_thold = rssi_thold;
2447         bss_conf->cqm_rssi_hyst = rssi_hyst;
2448 
2449         /* tell the driver upon association, unless already associated */
2450         if (sdata->u.mgd.associated &&
2451             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2452                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2453 
2454         return 0;
2455 }
2456 
2457 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2458                                       struct net_device *dev,
2459                                       const u8 *addr,
2460                                       const struct cfg80211_bitrate_mask *mask)
2461 {
2462         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2463         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2464         int i, ret;
2465 
2466         if (!ieee80211_sdata_running(sdata))
2467                 return -ENETDOWN;
2468 
2469         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
2470                 ret = drv_set_bitrate_mask(local, sdata, mask);
2471                 if (ret)
2472                         return ret;
2473         }
2474 
2475         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2476                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2477                 int j;
2478 
2479                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2480                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2481                        sizeof(mask->control[i].ht_mcs));
2482 
2483                 sdata->rc_has_mcs_mask[i] = false;
2484                 if (!sband)
2485                         continue;
2486 
2487                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++)
2488                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2489                                 sdata->rc_has_mcs_mask[i] = true;
2490                                 break;
2491                         }
2492         }
2493 
2494         return 0;
2495 }
2496 
2497 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2498                                            struct ieee80211_roc_work *new_roc,
2499                                            struct ieee80211_roc_work *cur_roc)
2500 {
2501         unsigned long j = jiffies;
2502         unsigned long cur_roc_end = cur_roc->hw_start_time +
2503                                     msecs_to_jiffies(cur_roc->duration);
2504         struct ieee80211_roc_work *next_roc;
2505         int new_dur;
2506 
2507         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2508                 return false;
2509 
2510         if (time_after(j + IEEE80211_ROC_MIN_LEFT, cur_roc_end))
2511                 return false;
2512 
2513         ieee80211_handle_roc_started(new_roc);
2514 
2515         new_dur = new_roc->duration - jiffies_to_msecs(cur_roc_end - j);
2516 
2517         /* cur_roc is long enough - add new_roc to the dependents list. */
2518         if (new_dur <= 0) {
2519                 list_add_tail(&new_roc->list, &cur_roc->dependents);
2520                 return true;
2521         }
2522 
2523         new_roc->duration = new_dur;
2524 
2525         /*
2526          * if cur_roc was already coalesced before, we might
2527          * want to extend the next roc instead of adding
2528          * a new one.
2529          */
2530         next_roc = list_entry(cur_roc->list.next,
2531                               struct ieee80211_roc_work, list);
2532         if (&next_roc->list != &local->roc_list &&
2533             next_roc->chan == new_roc->chan &&
2534             next_roc->sdata == new_roc->sdata &&
2535             !WARN_ON(next_roc->started)) {
2536                 list_add_tail(&new_roc->list, &next_roc->dependents);
2537                 next_roc->duration = max(next_roc->duration,
2538                                          new_roc->duration);
2539                 next_roc->type = max(next_roc->type, new_roc->type);
2540                 return true;
2541         }
2542 
2543         /* add right after cur_roc */
2544         list_add(&new_roc->list, &cur_roc->list);
2545 
2546         return true;
2547 }
2548 
2549 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2550                                     struct ieee80211_sub_if_data *sdata,
2551                                     struct ieee80211_channel *channel,
2552                                     unsigned int duration, u64 *cookie,
2553                                     struct sk_buff *txskb,
2554                                     enum ieee80211_roc_type type)
2555 {
2556         struct ieee80211_roc_work *roc, *tmp;
2557         bool queued = false;
2558         int ret;
2559 
2560         lockdep_assert_held(&local->mtx);
2561 
2562         if (local->use_chanctx && !local->ops->remain_on_channel)
2563                 return -EOPNOTSUPP;
2564 
2565         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2566         if (!roc)
2567                 return -ENOMEM;
2568 
2569         /*
2570          * If the duration is zero, then the driver
2571          * wouldn't actually do anything. Set it to
2572          * 10 for now.
2573          *
2574          * TODO: cancel the off-channel operation
2575          *       when we get the SKB's TX status and
2576          *       the wait time was zero before.
2577          */
2578         if (!duration)
2579                 duration = 10;
2580 
2581         roc->chan = channel;
2582         roc->duration = duration;
2583         roc->req_duration = duration;
2584         roc->frame = txskb;
2585         roc->type = type;
2586         roc->mgmt_tx_cookie = (unsigned long)txskb;
2587         roc->sdata = sdata;
2588         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2589         INIT_LIST_HEAD(&roc->dependents);
2590 
2591         /*
2592          * cookie is either the roc cookie (for normal roc)
2593          * or the SKB (for mgmt TX)
2594          */
2595         if (!txskb) {
2596                 /* local->mtx protects this */
2597                 local->roc_cookie_counter++;
2598                 roc->cookie = local->roc_cookie_counter;
2599                 /* wow, you wrapped 64 bits ... more likely a bug */
2600                 if (WARN_ON(roc->cookie == 0)) {
2601                         roc->cookie = 1;
2602                         local->roc_cookie_counter++;
2603                 }
2604                 *cookie = roc->cookie;
2605         } else {
2606                 *cookie = (unsigned long)txskb;
2607         }
2608 
2609         /* if there's one pending or we're scanning, queue this one */
2610         if (!list_empty(&local->roc_list) ||
2611             local->scanning || ieee80211_is_radar_required(local))
2612                 goto out_check_combine;
2613 
2614         /* if not HW assist, just queue & schedule work */
2615         if (!local->ops->remain_on_channel) {
2616                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2617                 goto out_queue;
2618         }
2619 
2620         /* otherwise actually kick it off here (for error handling) */
2621 
2622         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2623         if (ret) {
2624                 kfree(roc);
2625                 return ret;
2626         }
2627 
2628         roc->started = true;
2629         goto out_queue;
2630 
2631  out_check_combine:
2632         list_for_each_entry(tmp, &local->roc_list, list) {
2633                 if (tmp->chan != channel || tmp->sdata != sdata)
2634                         continue;
2635 
2636                 /*
2637                  * Extend this ROC if possible:
2638                  *
2639                  * If it hasn't started yet, just increase the duration
2640                  * and add the new one to the list of dependents.
2641                  * If the type of the new ROC has higher priority, modify the
2642                  * type of the previous one to match that of the new one.
2643                  */
2644                 if (!tmp->started) {
2645                         list_add_tail(&roc->list, &tmp->dependents);
2646                         tmp->duration = max(tmp->duration, roc->duration);
2647                         tmp->type = max(tmp->type, roc->type);
2648                         queued = true;
2649                         break;
2650                 }
2651 
2652                 /* If it has already started, it's more difficult ... */
2653                 if (local->ops->remain_on_channel) {
2654                         /*
2655                          * In the offloaded ROC case, if it hasn't begun, add
2656                          * this new one to the dependent list to be handled
2657                          * when the master one begins. If it has begun,
2658                          * check that there's still a minimum time left and
2659                          * if so, start this one, transmitting the frame, but
2660                          * add it to the list directly after this one with
2661                          * a reduced time so we'll ask the driver to execute
2662                          * it right after finishing the previous one, in the
2663                          * hope that it'll also be executed right afterwards,
2664                          * effectively extending the old one.
2665                          * If there's no minimum time left, just add it to the
2666                          * normal list.
2667                          * TODO: the ROC type is ignored here, assuming that it
2668                          * is better to immediately use the current ROC.
2669                          */
2670                         if (!tmp->hw_begun) {
2671                                 list_add_tail(&roc->list, &tmp->dependents);
2672                                 queued = true;
2673                                 break;
2674                         }
2675 
2676                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2677                                 queued = true;
2678                 } else if (del_timer_sync(&tmp->work.timer)) {
2679                         unsigned long new_end;
2680 
2681                         /*
2682                          * In the software ROC case, cancel the timer, if
2683                          * that fails then the finish work is already
2684                          * queued/pending and thus we queue the new ROC
2685                          * normally, if that succeeds then we can extend
2686                          * the timer duration and TX the frame (if any.)
2687                          */
2688 
2689                         list_add_tail(&roc->list, &tmp->dependents);
2690                         queued = true;
2691 
2692                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2693 
2694                         /* ok, it was started & we canceled timer */
2695                         if (time_after(new_end, tmp->work.timer.expires))
2696                                 mod_timer(&tmp->work.timer, new_end);
2697                         else
2698                                 add_timer(&tmp->work.timer);
2699 
2700                         ieee80211_handle_roc_started(roc);
2701                 }
2702                 break;
2703         }
2704 
2705  out_queue:
2706         if (!queued)
2707                 list_add_tail(&roc->list, &local->roc_list);
2708 
2709         return 0;
2710 }
2711 
2712 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2713                                        struct wireless_dev *wdev,
2714                                        struct ieee80211_channel *chan,
2715                                        unsigned int duration,
2716                                        u64 *cookie)
2717 {
2718         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2719         struct ieee80211_local *local = sdata->local;
2720         int ret;
2721 
2722         mutex_lock(&local->mtx);
2723         ret = ieee80211_start_roc_work(local, sdata, chan,
2724                                        duration, cookie, NULL,
2725                                        IEEE80211_ROC_TYPE_NORMAL);
2726         mutex_unlock(&local->mtx);
2727 
2728         return ret;
2729 }
2730 
2731 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2732                                 u64 cookie, bool mgmt_tx)
2733 {
2734         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2735         int ret;
2736 
2737         mutex_lock(&local->mtx);
2738         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2739                 struct ieee80211_roc_work *dep, *tmp2;
2740 
2741                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2742                         if (!mgmt_tx && dep->cookie != cookie)
2743                                 continue;
2744                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2745                                 continue;
2746                         /* found dependent item -- just remove it */
2747                         list_del(&dep->list);
2748                         mutex_unlock(&local->mtx);
2749 
2750                         ieee80211_roc_notify_destroy(dep, true);
2751                         return 0;
2752                 }
2753 
2754                 if (!mgmt_tx && roc->cookie != cookie)
2755                         continue;
2756                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2757                         continue;
2758 
2759                 found = roc;
2760                 break;
2761         }
2762 
2763         if (!found) {
2764                 mutex_unlock(&local->mtx);
2765                 return -ENOENT;
2766         }
2767 
2768         /*
2769          * We found the item to cancel, so do that. Note that it
2770          * may have dependents, which we also cancel (and send
2771          * the expired signal for.) Not doing so would be quite
2772          * tricky here, but we may need to fix it later.
2773          */
2774 
2775         if (local->ops->remain_on_channel) {
2776                 if (found->started) {
2777                         ret = drv_cancel_remain_on_channel(local);
2778                         if (WARN_ON_ONCE(ret)) {
2779                                 mutex_unlock(&local->mtx);
2780                                 return ret;
2781                         }
2782                 }
2783 
2784                 list_del(&found->list);
2785 
2786                 if (found->started)
2787                         ieee80211_start_next_roc(local);
2788                 mutex_unlock(&local->mtx);
2789 
2790                 ieee80211_roc_notify_destroy(found, true);
2791         } else {
2792                 /* work may be pending so use it all the time */
2793                 found->abort = true;
2794                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2795 
2796                 mutex_unlock(&local->mtx);
2797 
2798                 /* work will clean up etc */
2799                 flush_delayed_work(&found->work);
2800                 WARN_ON(!found->to_be_freed);
2801                 kfree(found);
2802         }
2803 
2804         return 0;
2805 }
2806 
2807 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2808                                               struct wireless_dev *wdev,
2809                                               u64 cookie)
2810 {
2811         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2812         struct ieee80211_local *local = sdata->local;
2813 
2814         return ieee80211_cancel_roc(local, cookie, false);
2815 }
2816 
2817 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2818                                            struct net_device *dev,
2819                                            struct cfg80211_chan_def *chandef,
2820                                            u32 cac_time_ms)
2821 {
2822         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2823         struct ieee80211_local *local = sdata->local;
2824         int err;
2825 
2826         mutex_lock(&local->mtx);
2827         if (!list_empty(&local->roc_list) || local->scanning) {
2828                 err = -EBUSY;
2829                 goto out_unlock;
2830         }
2831 
2832         /* whatever, but channel contexts should not complain about that one */
2833         sdata->smps_mode = IEEE80211_SMPS_OFF;
2834         sdata->needed_rx_chains = local->rx_chains;
2835 
2836         err = ieee80211_vif_use_channel(sdata, chandef,
2837                                         IEEE80211_CHANCTX_SHARED);
2838         if (err)
2839                 goto out_unlock;
2840 
2841         ieee80211_queue_delayed_work(&sdata->local->hw,
2842                                      &sdata->dfs_cac_timer_work,
2843                                      msecs_to_jiffies(cac_time_ms));
2844 
2845  out_unlock:
2846         mutex_unlock(&local->mtx);
2847         return err;
2848 }
2849 
2850 static struct cfg80211_beacon_data *
2851 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2852 {
2853         struct cfg80211_beacon_data *new_beacon;
2854         u8 *pos;
2855         int len;
2856 
2857         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2858               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2859               beacon->probe_resp_len;
2860 
2861         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2862         if (!new_beacon)
2863                 return NULL;
2864 
2865         pos = (u8 *)(new_beacon + 1);
2866         if (beacon->head_len) {
2867                 new_beacon->head_len = beacon->head_len;
2868                 new_beacon->head = pos;
2869                 memcpy(pos, beacon->head, beacon->head_len);
2870                 pos += beacon->head_len;
2871         }
2872         if (beacon->tail_len) {
2873                 new_beacon->tail_len = beacon->tail_len;
2874                 new_beacon->tail = pos;
2875                 memcpy(pos, beacon->tail, beacon->tail_len);
2876                 pos += beacon->tail_len;
2877         }
2878         if (beacon->beacon_ies_len) {
2879                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2880                 new_beacon->beacon_ies = pos;
2881                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2882                 pos += beacon->beacon_ies_len;
2883         }
2884         if (beacon->proberesp_ies_len) {
2885                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2886                 new_beacon->proberesp_ies = pos;
2887                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2888                 pos += beacon->proberesp_ies_len;
2889         }
2890         if (beacon->assocresp_ies_len) {
2891                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2892                 new_beacon->assocresp_ies = pos;
2893                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2894                 pos += beacon->assocresp_ies_len;
2895         }
2896         if (beacon->probe_resp_len) {
2897                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2898                 beacon->probe_resp = pos;
2899                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2900                 pos += beacon->probe_resp_len;
2901         }
2902 
2903         return new_beacon;
2904 }
2905 
2906 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2907 {
2908         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2909 
2910         ieee80211_queue_work(&sdata->local->hw,
2911                              &sdata->csa_finalize_work);
2912 }
2913 EXPORT_SYMBOL(ieee80211_csa_finish);
2914 
2915 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2916                                           u32 *changed)
2917 {
2918         int err;
2919 
2920         switch (sdata->vif.type) {
2921         case NL80211_IFTYPE_AP:
2922                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2923                                               NULL);
2924                 kfree(sdata->u.ap.next_beacon);
2925                 sdata->u.ap.next_beacon = NULL;
2926 
2927                 if (err < 0)
2928                         return err;
2929                 *changed |= err;
2930                 break;
2931         case NL80211_IFTYPE_ADHOC:
2932                 err = ieee80211_ibss_finish_csa(sdata);
2933                 if (err < 0)
2934                         return err;
2935                 *changed |= err;
2936                 break;
2937 #ifdef CONFIG_MAC80211_MESH
2938         case NL80211_IFTYPE_MESH_POINT:
2939                 err = ieee80211_mesh_finish_csa(sdata);
2940                 if (err < 0)
2941                         return err;
2942                 *changed |= err;
2943                 break;
2944 #endif
2945         default:
2946                 WARN_ON(1);
2947                 return -EINVAL;
2948         }
2949 
2950         return 0;
2951 }
2952 
2953 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2954 {
2955         struct ieee80211_local *local = sdata->local;
2956         u32 changed = 0;
2957         int err;
2958 
2959         sdata_assert_lock(sdata);
2960         lockdep_assert_held(&local->mtx);
2961         lockdep_assert_held(&local->chanctx_mtx);
2962 
2963         /*
2964          * using reservation isn't immediate as it may be deferred until later
2965          * with multi-vif. once reservation is complete it will re-schedule the
2966          * work with no reserved_chanctx so verify chandef to check if it
2967          * completed successfully
2968          */
2969 
2970         if (sdata->reserved_chanctx) {
2971                 /*
2972                  * with multi-vif csa driver may call ieee80211_csa_finish()
2973                  * many times while waiting for other interfaces to use their
2974                  * reservations
2975                  */
2976                 if (sdata->reserved_ready)
2977                         return 0;
2978 
2979                 return ieee80211_vif_use_reserved_context(sdata);
2980         }
2981 
2982         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2983                                         &sdata->csa_chandef))
2984                 return -EINVAL;
2985 
2986         sdata->vif.csa_active = false;
2987 
2988         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2989         if (err)
2990                 return err;
2991 
2992         ieee80211_bss_info_change_notify(sdata, changed);
2993 
2994         if (sdata->csa_block_tx) {
2995                 ieee80211_wake_vif_queues(local, sdata,
2996                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2997                 sdata->csa_block_tx = false;
2998         }
2999 
3000         err = drv_post_channel_switch(sdata);
3001         if (err)
3002                 return err;
3003 
3004         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
3005 
3006         return 0;
3007 }
3008 
3009 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
3010 {
3011         if (__ieee80211_csa_finalize(sdata)) {
3012                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
3013                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
3014                                     GFP_KERNEL);
3015         }
3016 }
3017 
3018 void ieee80211_csa_finalize_work(struct work_struct *work)
3019 {
3020         struct ieee80211_sub_if_data *sdata =
3021                 container_of(work, struct ieee80211_sub_if_data,
3022                              csa_finalize_work);
3023         struct ieee80211_local *local = sdata->local;
3024 
3025         sdata_lock(sdata);
3026         mutex_lock(&local->mtx);
3027         mutex_lock(&local->chanctx_mtx);
3028 
3029         /* AP might have been stopped while waiting for the lock. */
3030         if (!sdata->vif.csa_active)
3031                 goto unlock;
3032 
3033         if (!ieee80211_sdata_running(sdata))
3034                 goto unlock;
3035 
3036         ieee80211_csa_finalize(sdata);
3037 
3038 unlock:
3039         mutex_unlock(&local->chanctx_mtx);
3040         mutex_unlock(&local->mtx);
3041         sdata_unlock(sdata);
3042 }
3043 
3044 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3045                                     struct cfg80211_csa_settings *params,
3046                                     u32 *changed)
3047 {
3048         struct ieee80211_csa_settings csa = {};
3049         int err;
3050 
3051         switch (sdata->vif.type) {
3052         case NL80211_IFTYPE_AP:
3053                 sdata->u.ap.next_beacon =
3054                         cfg80211_beacon_dup(&params->beacon_after);
3055                 if (!sdata->u.ap.next_beacon)
3056                         return -ENOMEM;
3057 
3058                 /*
3059                  * With a count of 0, we don't have to wait for any
3060                  * TBTT before switching, so complete the CSA
3061                  * immediately.  In theory, with a count == 1 we
3062                  * should delay the switch until just before the next
3063                  * TBTT, but that would complicate things so we switch
3064                  * immediately too.  If we would delay the switch
3065                  * until the next TBTT, we would have to set the probe
3066                  * response here.
3067                  *
3068                  * TODO: A channel switch with count <= 1 without
3069                  * sending a CSA action frame is kind of useless,
3070                  * because the clients won't know we're changing
3071                  * channels.  The action frame must be implemented
3072                  * either here or in the userspace.
3073                  */
3074                 if (params->count <= 1)
3075                         break;
3076 
3077                 if ((params->n_counter_offsets_beacon >
3078                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3079                     (params->n_counter_offsets_presp >
3080                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3081                         return -EINVAL;
3082 
3083                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3084                 csa.counter_offsets_presp = params->counter_offsets_presp;
3085                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3086                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3087                 csa.count = params->count;
3088 
3089                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3090                 if (err < 0) {
3091                         kfree(sdata->u.ap.next_beacon);
3092                         return err;
3093                 }
3094                 *changed |= err;
3095 
3096                 break;
3097         case NL80211_IFTYPE_ADHOC:
3098                 if (!sdata->vif.bss_conf.ibss_joined)
3099                         return -EINVAL;
3100 
3101                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3102                         return -EINVAL;
3103 
3104                 switch (params->chandef.width) {
3105                 case NL80211_CHAN_WIDTH_40:
3106                         if (cfg80211_get_chandef_type(&params->chandef) !=
3107                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3108                                 return -EINVAL;
3109                 case NL80211_CHAN_WIDTH_5:
3110                 case NL80211_CHAN_WIDTH_10:
3111                 case NL80211_CHAN_WIDTH_20_NOHT:
3112                 case NL80211_CHAN_WIDTH_20:
3113                         break;
3114                 default:
3115                         return -EINVAL;
3116                 }
3117 
3118                 /* changes into another band are not supported */
3119                 if (sdata->u.ibss.chandef.chan->band !=
3120                     params->chandef.chan->band)
3121                         return -EINVAL;
3122 
3123                 /* see comments in the NL80211_IFTYPE_AP block */
3124                 if (params->count > 1) {
3125                         err = ieee80211_ibss_csa_beacon(sdata, params);
3126                         if (err < 0)
3127                                 return err;
3128                         *changed |= err;
3129                 }
3130 
3131                 ieee80211_send_action_csa(sdata, params);
3132 
3133                 break;
3134 #ifdef CONFIG_MAC80211_MESH
3135         case NL80211_IFTYPE_MESH_POINT: {
3136                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3137 
3138                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3139                         return -EINVAL;
3140 
3141                 /* changes into another band are not supported */
3142                 if (sdata->vif.bss_conf.chandef.chan->band !=
3143                     params->chandef.chan->band)
3144                         return -EINVAL;
3145 
3146                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3147                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3148                         if (!ifmsh->pre_value)
3149                                 ifmsh->pre_value = 1;
3150                         else
3151                                 ifmsh->pre_value++;
3152                 }
3153 
3154                 /* see comments in the NL80211_IFTYPE_AP block */
3155                 if (params->count > 1) {
3156                         err = ieee80211_mesh_csa_beacon(sdata, params);
3157                         if (err < 0) {
3158                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3159                                 return err;
3160                         }
3161                         *changed |= err;
3162                 }
3163 
3164                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3165                         ieee80211_send_action_csa(sdata, params);
3166 
3167                 break;
3168                 }
3169 #endif
3170         default:
3171                 return -EOPNOTSUPP;
3172         }
3173 
3174         return 0;
3175 }
3176 
3177 static int
3178 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3179                            struct cfg80211_csa_settings *params)
3180 {
3181         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3182         struct ieee80211_local *local = sdata->local;
3183         struct ieee80211_channel_switch ch_switch;
3184         struct ieee80211_chanctx_conf *conf;
3185         struct ieee80211_chanctx *chanctx;
3186         u32 changed = 0;
3187         int err;
3188 
3189         sdata_assert_lock(sdata);
3190         lockdep_assert_held(&local->mtx);
3191 
3192         if (!list_empty(&local->roc_list) || local->scanning)
3193                 return -EBUSY;
3194 
3195         if (sdata->wdev.cac_started)
3196                 return -EBUSY;
3197 
3198         if (cfg80211_chandef_identical(&params->chandef,
3199                                        &sdata->vif.bss_conf.chandef))
3200                 return -EINVAL;
3201 
3202         /* don't allow another channel switch if one is already active. */
3203         if (sdata->vif.csa_active)
3204                 return -EBUSY;
3205 
3206         mutex_lock(&local->chanctx_mtx);
3207         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3208                                          lockdep_is_held(&local->chanctx_mtx));
3209         if (!conf) {
3210                 err = -EBUSY;
3211                 goto out;
3212         }
3213 
3214         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3215         if (!chanctx) {
3216                 err = -EBUSY;
3217                 goto out;
3218         }
3219 
3220         ch_switch.timestamp = 0;
3221         ch_switch.device_timestamp = 0;
3222         ch_switch.block_tx = params->block_tx;
3223         ch_switch.chandef = params->chandef;
3224         ch_switch.count = params->count;
3225 
3226         err = drv_pre_channel_switch(sdata, &ch_switch);
3227         if (err)
3228                 goto out;
3229 
3230         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3231                                             chanctx->mode,
3232                                             params->radar_required);
3233         if (err)
3234                 goto out;
3235 
3236         /* if reservation is invalid then this will fail */
3237         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3238         if (err) {
3239                 ieee80211_vif_unreserve_chanctx(sdata);
3240                 goto out;
3241         }
3242 
3243         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3244         if (err) {
3245                 ieee80211_vif_unreserve_chanctx(sdata);
3246                 goto out;
3247         }
3248 
3249         sdata->csa_chandef = params->chandef;
3250         sdata->csa_block_tx = params->block_tx;
3251         sdata->vif.csa_active = true;
3252 
3253         if (sdata->csa_block_tx)
3254                 ieee80211_stop_vif_queues(local, sdata,
3255                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3256 
3257         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3258                                           params->count);
3259 
3260         if (changed) {
3261                 ieee80211_bss_info_change_notify(sdata, changed);
3262                 drv_channel_switch_beacon(sdata, &params->chandef);
3263         } else {
3264                 /* if the beacon didn't change, we can finalize immediately */
3265                 ieee80211_csa_finalize(sdata);
3266         }
3267 
3268 out:
3269         mutex_unlock(&local->chanctx_mtx);
3270         return err;
3271 }
3272 
3273 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3274                              struct cfg80211_csa_settings *params)
3275 {
3276         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3277         struct ieee80211_local *local = sdata->local;
3278         int err;
3279 
3280         mutex_lock(&local->mtx);
3281         err = __ieee80211_channel_switch(wiphy, dev, params);
3282         mutex_unlock(&local->mtx);
3283 
3284         return err;
3285 }
3286 
3287 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3288                              struct cfg80211_mgmt_tx_params *params,
3289                              u64 *cookie)
3290 {
3291         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3292         struct ieee80211_local *local = sdata->local;
3293         struct sk_buff *skb;
3294         struct sta_info *sta;
3295         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3296         bool need_offchan = false;
3297         u32 flags;
3298         int ret;
3299         u8 *data;
3300 
3301         if (params->dont_wait_for_ack)
3302                 flags = IEEE80211_TX_CTL_NO_ACK;
3303         else
3304                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3305                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3306 
3307         if (params->no_cck)
3308                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3309 
3310         switch (sdata->vif.type) {
3311         case NL80211_IFTYPE_ADHOC:
3312                 if (!sdata->vif.bss_conf.ibss_joined)
3313                         need_offchan = true;
3314                 /* fall through */
3315 #ifdef CONFIG_MAC80211_MESH
3316         case NL80211_IFTYPE_MESH_POINT:
3317                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3318                     !sdata->u.mesh.mesh_id_len)
3319                         need_offchan = true;
3320                 /* fall through */
3321 #endif
3322         case NL80211_IFTYPE_AP:
3323         case NL80211_IFTYPE_AP_VLAN:
3324         case NL80211_IFTYPE_P2P_GO:
3325                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3326                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3327                     !rcu_access_pointer(sdata->bss->beacon))
3328                         need_offchan = true;
3329                 if (!ieee80211_is_action(mgmt->frame_control) ||
3330                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3331                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3332                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3333                         break;
3334                 rcu_read_lock();
3335                 sta = sta_info_get(sdata, mgmt->da);
3336                 rcu_read_unlock();
3337                 if (!sta)
3338                         return -ENOLINK;
3339                 break;
3340         case NL80211_IFTYPE_STATION:
3341         case NL80211_IFTYPE_P2P_CLIENT:
3342                 if (!sdata->u.mgd.associated)
3343                         need_offchan = true;
3344                 break;
3345         case NL80211_IFTYPE_P2P_DEVICE:
3346                 need_offchan = true;
3347                 break;
3348         default:
3349                 return -EOPNOTSUPP;
3350         }
3351 
3352         /* configurations requiring offchan cannot work if no channel has been
3353          * specified
3354          */
3355         if (need_offchan && !params->chan)
3356                 return -EINVAL;
3357 
3358         mutex_lock(&local->mtx);
3359 
3360         /* Check if the operating channel is the requested channel */
3361         if (!need_offchan) {
3362                 struct ieee80211_chanctx_conf *chanctx_conf;
3363 
3364                 rcu_read_lock();
3365                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3366 
3367                 if (chanctx_conf) {
3368                         need_offchan = params->chan &&
3369                                        (params->chan !=
3370                                         chanctx_conf->def.chan);
3371                 } else if (!params->chan) {
3372                         ret = -EINVAL;
3373                         rcu_read_unlock();
3374                         goto out_unlock;
3375                 } else {
3376                         need_offchan = true;
3377                 }
3378                 rcu_read_unlock();
3379         }
3380 
3381         if (need_offchan && !params->offchan) {
3382                 ret = -EBUSY;
3383                 goto out_unlock;
3384         }
3385 
3386         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3387         if (!skb) {
3388                 ret = -ENOMEM;
3389                 goto out_unlock;
3390         }
3391         skb_reserve(skb, local->hw.extra_tx_headroom);
3392 
3393         data = skb_put(skb, params->len);
3394         memcpy(data, params->buf, params->len);
3395 
3396         /* Update CSA counters */
3397         if (sdata->vif.csa_active &&
3398             (sdata->vif.type == NL80211_IFTYPE_AP ||
3399              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3400             params->n_csa_offsets) {
3401                 int i;
3402                 struct beacon_data *beacon = NULL;
3403 
3404                 rcu_read_lock();
3405 
3406                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3407                         beacon = rcu_dereference(sdata->u.ap.beacon);
3408                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3409                         beacon = rcu_dereference(sdata->u.ibss.presp);
3410                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3411                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3412 
3413                 if (beacon)
3414                         for (i = 0; i < params->n_csa_offsets; i++)
3415                                 data[params->csa_offsets[i]] =
3416                                         beacon->csa_current_counter;
3417 
3418                 rcu_read_unlock();
3419         }
3420 
3421         IEEE80211_SKB_CB(skb)->flags = flags;
3422 
3423         skb->dev = sdata->dev;
3424 
3425         if (!need_offchan) {
3426                 *cookie = (unsigned long) skb;
3427                 ieee80211_tx_skb(sdata, skb);
3428                 ret = 0;
3429                 goto out_unlock;
3430         }
3431 
3432         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3433                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3434         if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
3435                 IEEE80211_SKB_CB(skb)->hw_queue =
3436                         local->hw.offchannel_tx_hw_queue;
3437 
3438         /* This will handle all kinds of coalescing and immediate TX */
3439         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3440                                        params->wait, cookie, skb,
3441                                        IEEE80211_ROC_TYPE_MGMT_TX);
3442         if (ret)
3443                 kfree_skb(skb);
3444  out_unlock:
3445         mutex_unlock(&local->mtx);
3446         return ret;
3447 }
3448 
3449 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3450                                          struct wireless_dev *wdev,
3451                                          u64 cookie)
3452 {
3453         struct ieee80211_local *local = wiphy_priv(wiphy);
3454 
3455         return ieee80211_cancel_roc(local, cookie, true);
3456 }
3457 
3458 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3459                                           struct wireless_dev *wdev,
3460                                           u16 frame_type, bool reg)
3461 {
3462         struct ieee80211_local *local = wiphy_priv(wiphy);
3463 
3464         switch (frame_type) {
3465         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3466                 if (reg)
3467                         local->probe_req_reg++;
3468                 else
3469                         local->probe_req_reg--;
3470 
3471                 if (!local->open_count)
3472                         break;
3473 
3474                 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
3475                 break;
3476         default:
3477                 break;
3478         }
3479 }
3480 
3481 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3482 {
3483         struct ieee80211_local *local = wiphy_priv(wiphy);
3484 
3485         if (local->started)
3486                 return -EOPNOTSUPP;
3487 
3488         return drv_set_antenna(local, tx_ant, rx_ant);
3489 }
3490 
3491 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3492 {
3493         struct ieee80211_local *local = wiphy_priv(wiphy);
3494 
3495         return drv_get_antenna(local, tx_ant, rx_ant);
3496 }
3497 
3498 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3499                                     struct net_device *dev,
3500                                     struct cfg80211_gtk_rekey_data *data)
3501 {
3502         struct ieee80211_local *local = wiphy_priv(wiphy);
3503         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3504 
3505         if (!local->ops->set_rekey_data)
3506                 return -EOPNOTSUPP;
3507 
3508         drv_set_rekey_data(local, sdata, data);
3509 
3510         return 0;
3511 }
3512 
3513 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3514                                   const u8 *peer, u64 *cookie)
3515 {
3516         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3517         struct ieee80211_local *local = sdata->local;
3518         struct ieee80211_qos_hdr *nullfunc;
3519         struct sk_buff *skb;
3520         int size = sizeof(*nullfunc);
3521         __le16 fc;
3522         bool qos;
3523         struct ieee80211_tx_info *info;
3524         struct sta_info *sta;
3525         struct ieee80211_chanctx_conf *chanctx_conf;
3526         enum ieee80211_band band;
3527 
3528         rcu_read_lock();
3529         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3530         if (WARN_ON(!chanctx_conf)) {
3531                 rcu_read_unlock();
3532                 return -EINVAL;
3533         }
3534         band = chanctx_conf->def.chan->band;
3535         sta = sta_info_get_bss(sdata, peer);
3536         if (sta) {
3537                 qos = sta->sta.wme;
3538         } else {
3539                 rcu_read_unlock();
3540                 return -ENOLINK;
3541         }
3542 
3543         if (qos) {
3544                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3545                                  IEEE80211_STYPE_QOS_NULLFUNC |
3546                                  IEEE80211_FCTL_FROMDS);
3547         } else {
3548                 size -= 2;
3549                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3550                                  IEEE80211_STYPE_NULLFUNC |
3551                                  IEEE80211_FCTL_FROMDS);
3552         }
3553 
3554         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3555         if (!skb) {
3556                 rcu_read_unlock();
3557                 return -ENOMEM;
3558         }
3559 
3560         skb->dev = dev;
3561 
3562         skb_reserve(skb, local->hw.extra_tx_headroom);
3563 
3564         nullfunc = (void *) skb_put(skb, size);
3565         nullfunc->frame_control = fc;
3566         nullfunc->duration_id = 0;
3567         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3568         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3569         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3570         nullfunc->seq_ctrl = 0;
3571 
3572         info = IEEE80211_SKB_CB(skb);
3573 
3574         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3575                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3576         info->band = band;
3577 
3578         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3579         skb->priority = 7;
3580         if (qos)
3581                 nullfunc->qos_ctrl = cpu_to_le16(7);
3582 
3583         local_bh_disable();
3584         ieee80211_xmit(sdata, skb);
3585         local_bh_enable();
3586         rcu_read_unlock();
3587 
3588         *cookie = (unsigned long) skb;
3589         return 0;
3590 }
3591 
3592 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3593                                      struct wireless_dev *wdev,
3594                                      struct cfg80211_chan_def *chandef)
3595 {
3596         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3597         struct ieee80211_local *local = wiphy_priv(wiphy);
3598         struct ieee80211_chanctx_conf *chanctx_conf;
3599         int ret = -ENODATA;
3600 
3601         rcu_read_lock();
3602         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3603         if (chanctx_conf) {
3604                 *chandef = sdata->vif.bss_conf.chandef;
3605                 ret = 0;
3606         } else if (local->open_count > 0 &&
3607                    local->open_count == local->monitors &&
3608                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3609                 if (local->use_chanctx)
3610                         *chandef = local->monitor_chandef;
3611                 else
3612                         *chandef = local->_oper_chandef;
3613                 ret = 0;
3614         }
3615         rcu_read_unlock();
3616 
3617         return ret;
3618 }
3619 
3620 #ifdef CONFIG_PM
3621 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3622 {
3623         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3624 }
3625 #endif
3626 
3627 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3628                                  struct net_device *dev,
3629                                  struct cfg80211_qos_map *qos_map)
3630 {
3631         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3632         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3633 
3634         if (qos_map) {
3635                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3636                 if (!new_qos_map)
3637                         return -ENOMEM;
3638                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3639         } else {
3640                 /* A NULL qos_map was passed to disable QoS mapping */
3641                 new_qos_map = NULL;
3642         }
3643 
3644         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3645         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3646         if (old_qos_map)
3647                 kfree_rcu(old_qos_map, rcu_head);
3648 
3649         return 0;
3650 }
3651 
3652 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3653                                       struct net_device *dev,
3654                                       struct cfg80211_chan_def *chandef)
3655 {
3656         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3657         int ret;
3658         u32 changed = 0;
3659 
3660         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3661         if (ret == 0)
3662                 ieee80211_bss_info_change_notify(sdata, changed);
3663 
3664         return ret;
3665 }
3666 
3667 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3668                                u8 tsid, const u8 *peer, u8 up,
3669                                u16 admitted_time)
3670 {
3671         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3672         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3673         int ac = ieee802_1d_to_ac[up];
3674 
3675         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3676                 return -EOPNOTSUPP;
3677 
3678         if (!(sdata->wmm_acm & BIT(up)))
3679                 return -EINVAL;
3680 
3681         if (ifmgd->tx_tspec[ac].admitted_time)
3682                 return -EBUSY;
3683 
3684         if (admitted_time) {
3685                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3686                 ifmgd->tx_tspec[ac].tsid = tsid;
3687                 ifmgd->tx_tspec[ac].up = up;
3688         }
3689 
3690         return 0;
3691 }
3692 
3693 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3694                                u8 tsid, const u8 *peer)
3695 {
3696         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3697         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3698         struct ieee80211_local *local = wiphy_priv(wiphy);
3699         int ac;
3700 
3701         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3702                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3703 
3704                 /* skip unused entries */
3705                 if (!tx_tspec->admitted_time)
3706                         continue;
3707 
3708                 if (tx_tspec->tsid != tsid)
3709                         continue;
3710 
3711                 /* due to this new packets will be reassigned to non-ACM ACs */
3712                 tx_tspec->up = -1;
3713 
3714                 /* Make sure that all packets have been sent to avoid to
3715                  * restore the QoS params on packets that are still on the
3716                  * queues.
3717                  */
3718                 synchronize_net();
3719                 ieee80211_flush_queues(local, sdata, false);
3720 
3721                 /* restore the normal QoS parameters
3722                  * (unconditionally to avoid races)
3723                  */
3724                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3725                 tx_tspec->downgraded = false;
3726                 ieee80211_sta_handle_tspec_ac_params(sdata);
3727 
3728                 /* finally clear all the data */
3729                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3730 
3731                 return 0;
3732         }
3733 
3734         return -ENOENT;
3735 }
3736 
3737 const struct cfg80211_ops mac80211_config_ops = {
3738         .add_virtual_intf = ieee80211_add_iface,
3739         .del_virtual_intf = ieee80211_del_iface,
3740         .change_virtual_intf = ieee80211_change_iface,
3741         .start_p2p_device = ieee80211_start_p2p_device,
3742         .stop_p2p_device = ieee80211_stop_p2p_device,
3743         .add_key = ieee80211_add_key,
3744         .del_key = ieee80211_del_key,
3745         .get_key = ieee80211_get_key,
3746         .set_default_key = ieee80211_config_default_key,
3747         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3748         .start_ap = ieee80211_start_ap,
3749         .change_beacon = ieee80211_change_beacon,
3750         .stop_ap = ieee80211_stop_ap,
3751         .add_station = ieee80211_add_station,
3752         .del_station = ieee80211_del_station,
3753         .change_station = ieee80211_change_station,
3754         .get_station = ieee80211_get_station,
3755         .dump_station = ieee80211_dump_station,
3756         .dump_survey = ieee80211_dump_survey,
3757 #ifdef CONFIG_MAC80211_MESH
3758         .add_mpath = ieee80211_add_mpath,
3759         .del_mpath = ieee80211_del_mpath,
3760         .change_mpath = ieee80211_change_mpath,
3761         .get_mpath = ieee80211_get_mpath,
3762         .dump_mpath = ieee80211_dump_mpath,
3763         .get_mpp = ieee80211_get_mpp,
3764         .dump_mpp = ieee80211_dump_mpp,
3765         .update_mesh_config = ieee80211_update_mesh_config,
3766         .get_mesh_config = ieee80211_get_mesh_config,
3767         .join_mesh = ieee80211_join_mesh,
3768         .leave_mesh = ieee80211_leave_mesh,
3769 #endif
3770         .join_ocb = ieee80211_join_ocb,
3771         .leave_ocb = ieee80211_leave_ocb,
3772         .change_bss = ieee80211_change_bss,
3773         .set_txq_params = ieee80211_set_txq_params,
3774         .set_monitor_channel = ieee80211_set_monitor_channel,
3775         .suspend = ieee80211_suspend,
3776         .resume = ieee80211_resume,
3777         .scan = ieee80211_scan,
3778         .sched_scan_start = ieee80211_sched_scan_start,
3779         .sched_scan_stop = ieee80211_sched_scan_stop,
3780         .auth = ieee80211_auth,
3781         .assoc = ieee80211_assoc,
3782         .deauth = ieee80211_deauth,
3783         .disassoc = ieee80211_disassoc,
3784         .join_ibss = ieee80211_join_ibss,
3785         .leave_ibss = ieee80211_leave_ibss,
3786         .set_mcast_rate = ieee80211_set_mcast_rate,
3787         .set_wiphy_params = ieee80211_set_wiphy_params,
3788         .set_tx_power = ieee80211_set_tx_power,
3789         .get_tx_power = ieee80211_get_tx_power,
3790         .set_wds_peer = ieee80211_set_wds_peer,
3791         .rfkill_poll = ieee80211_rfkill_poll,
3792         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3793         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3794         .set_power_mgmt = ieee80211_set_power_mgmt,
3795         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3796         .remain_on_channel = ieee80211_remain_on_channel,
3797         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3798         .mgmt_tx = ieee80211_mgmt_tx,
3799         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3800         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3801         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3802         .set_antenna = ieee80211_set_antenna,
3803         .get_antenna = ieee80211_get_antenna,
3804         .set_rekey_data = ieee80211_set_rekey_data,
3805         .tdls_oper = ieee80211_tdls_oper,
3806         .tdls_mgmt = ieee80211_tdls_mgmt,
3807         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3808         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3809         .probe_client = ieee80211_probe_client,
3810         .set_noack_map = ieee80211_set_noack_map,
3811 #ifdef CONFIG_PM
3812         .set_wakeup = ieee80211_set_wakeup,
3813 #endif
3814         .get_channel = ieee80211_cfg_get_channel,
3815         .start_radar_detection = ieee80211_start_radar_detection,
3816         .channel_switch = ieee80211_channel_switch,
3817         .set_qos_map = ieee80211_set_qos_map,
3818         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3819         .add_tx_ts = ieee80211_add_tx_ts,
3820         .del_tx_ts = ieee80211_del_tx_ts,
3821 };
3822 

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