net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2015  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                                                 unsigned char name_assign_type,
  28                                                 enum nl80211_iftype type,
  29                                                 u32 *flags,
  30                                                 struct vif_params *params)
  31 {
  32         struct ieee80211_local *local = wiphy_priv(wiphy);
  33         struct wireless_dev *wdev;
  34         struct ieee80211_sub_if_data *sdata;
  35         int err;
  36
  37         err = ieee80211_if_add(local, name, name_assign_type, &wdev, type, params);
  38         if (err)
  39                 return ERR_PTR(err);
  40
  41         if (type == NL80211_IFTYPE_MONITOR && flags) {
  42                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  43                 sdata->u.mntr_flags = *flags;
  44         }
  45
  46         return wdev;
  47 }
  48
  49 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  50 {
  51         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  52
  53         return 0;
  54 }
  55
  56 static int ieee80211_change_iface(struct wiphy *wiphy,
  57                                   struct net_device *dev,
  58                                   enum nl80211_iftype type, u32 *flags,
  59                                   struct vif_params *params)
  60 {
  61         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  62         int ret;
  63
  64         ret = ieee80211_if_change_type(sdata, type);
  65         if (ret)
  66                 return ret;
  67
  68         if (type == NL80211_IFTYPE_AP_VLAN &&
  69             params && params->use_4addr == 0)
  70                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  71         else if (type == NL80211_IFTYPE_STATION &&
  72                  params && params->use_4addr >= 0)
  73                 sdata->u.mgd.use_4addr = params->use_4addr;
  74
  75         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  76                 struct ieee80211_local *local = sdata->local;
  77
  78                 if (ieee80211_sdata_running(sdata)) {
  79                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  80                                    MONITOR_FLAG_ACTIVE;
  81
  82                         /*
  83                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  84                          * MONITOR_FLAG_ACTIVE to be changed while the
  85                          * interface is up.
  86                          * Else we would need to add a lot of cruft
  87                          * to update everything:
  88                          *      cooked_mntrs, monitor and all fif_* counters
  89                          *      reconfigure hardware
  90                          */
  91                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  92                                 return -EBUSY;
  93
  94                         ieee80211_adjust_monitor_flags(sdata, -1);
  95                         sdata->u.mntr_flags = *flags;
  96                         ieee80211_adjust_monitor_flags(sdata, 1);
  97
  98                         ieee80211_configure_filter(local);
  99                 } else {
 100                         /*
 101                          * Because the interface is down, ieee80211_do_stop
 102                          * and ieee80211_do_open take care of "everything"
 103                          * mentioned in the comment above.
 104                          */
 105                         sdata->u.mntr_flags = *flags;
 106                 }
 107         }
 108
 109         return 0;
 110 }
 111
 112 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 113                                       struct wireless_dev *wdev)
 114 {
 115         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 116         int ret;
 117
 118         mutex_lock(&sdata->local->chanctx_mtx);
 119         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 120         mutex_unlock(&sdata->local->chanctx_mtx);
 121         if (ret < 0)
 122                 return ret;
 123
 124         return ieee80211_do_open(wdev, true);
 125 }
 126
 127 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 128                                       struct wireless_dev *wdev)
 129 {
 130         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 131 }
 132
 133 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 134                                   struct net_device *dev,
 135                                   u16 noack_map)
 136 {
 137         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 138
 139         sdata->noack_map = noack_map;
 140
 141         ieee80211_check_fast_xmit_iface(sdata);
 142
 143         return 0;
 144 }
 145
 146 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 147                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 148                              struct key_params *params)
 149 {
 150         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 151         struct ieee80211_local *local = sdata->local;
 152         struct sta_info *sta = NULL;
 153         const struct ieee80211_cipher_scheme *cs = NULL;
 154         struct ieee80211_key *key;
 155         int err;
 156
 157         if (!ieee80211_sdata_running(sdata))
 158                 return -ENETDOWN;
 159
 160         /* reject WEP and TKIP keys if WEP failed to initialize */
 161         switch (params->cipher) {
 162         case WLAN_CIPHER_SUITE_WEP40:
 163         case WLAN_CIPHER_SUITE_TKIP:
 164         case WLAN_CIPHER_SUITE_WEP104:
 165                 if (IS_ERR(local->wep_tx_tfm))
 166                         return -EINVAL;
 167                 break;
 168         case WLAN_CIPHER_SUITE_CCMP:
 169         case WLAN_CIPHER_SUITE_CCMP_256:
 170         case WLAN_CIPHER_SUITE_AES_CMAC:
 171         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 172         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 173         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 174         case WLAN_CIPHER_SUITE_GCMP:
 175         case WLAN_CIPHER_SUITE_GCMP_256:
 176                 break;
 177         default:
 178                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 179                 break;
 180         }
 181
 182         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 183                                   params->key, params->seq_len, params->seq,
 184                                   cs);
 185         if (IS_ERR(key))
 186                 return PTR_ERR(key);
 187
 188         if (pairwise)
 189                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 190
 191         mutex_lock(&local->sta_mtx);
 192
 193         if (mac_addr) {
 194                 if (ieee80211_vif_is_mesh(&sdata->vif))
 195                         sta = sta_info_get(sdata, mac_addr);
 196                 else
 197                         sta = sta_info_get_bss(sdata, mac_addr);
 198                 /*
 199                  * The ASSOC test makes sure the driver is ready to
 200                  * receive the key. When wpa_supplicant has roamed
 201                  * using FT, it attempts to set the key before
 202                  * association has completed, this rejects that attempt
 203                  * so it will set the key again after association.
 204                  *
 205                  * TODO: accept the key if we have a station entry and
 206                  *       add it to the device after the station.
 207                  */
 208                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 209                         ieee80211_key_free_unused(key);
 210                         err = -ENOENT;
 211                         goto out_unlock;
 212                 }
 213         }
 214
 215         switch (sdata->vif.type) {
 216         case NL80211_IFTYPE_STATION:
 217                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 218                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 219                 break;
 220         case NL80211_IFTYPE_AP:
 221         case NL80211_IFTYPE_AP_VLAN:
 222                 /* Keys without a station are used for TX only */
 223                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 224                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 225                 break;
 226         case NL80211_IFTYPE_ADHOC:
 227                 /* no MFP (yet) */
 228                 break;
 229         case NL80211_IFTYPE_MESH_POINT:
 230 #ifdef CONFIG_MAC80211_MESH
 231                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 232                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 233                 break;
 234 #endif
 235         case NL80211_IFTYPE_WDS:
 236         case NL80211_IFTYPE_MONITOR:
 237         case NL80211_IFTYPE_P2P_DEVICE:
 238         case NL80211_IFTYPE_UNSPECIFIED:
 239         case NUM_NL80211_IFTYPES:
 240         case NL80211_IFTYPE_P2P_CLIENT:
 241         case NL80211_IFTYPE_P2P_GO:
 242         case NL80211_IFTYPE_OCB:
 243                 /* shouldn't happen */
 244                 WARN_ON_ONCE(1);
 245                 break;
 246         }
 247
 248         if (sta)
 249                 sta->cipher_scheme = cs;
 250
 251         err = ieee80211_key_link(key, sdata, sta);
 252
 253  out_unlock:
 254         mutex_unlock(&local->sta_mtx);
 255
 256         return err;
 257 }
 258
 259 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 260                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 261 {
 262         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 263         struct ieee80211_local *local = sdata->local;
 264         struct sta_info *sta;
 265         struct ieee80211_key *key = NULL;
 266         int ret;
 267
 268         mutex_lock(&local->sta_mtx);
 269         mutex_lock(&local->key_mtx);
 270
 271         if (mac_addr) {
 272                 ret = -ENOENT;
 273
 274                 sta = sta_info_get_bss(sdata, mac_addr);
 275                 if (!sta)
 276                         goto out_unlock;
 277
 278                 if (pairwise)
 279                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 280                 else
 281                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 282         } else
 283                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 284
 285         if (!key) {
 286                 ret = -ENOENT;
 287                 goto out_unlock;
 288         }
 289
 290         ieee80211_key_free(key, true);
 291
 292         ret = 0;
 293  out_unlock:
 294         mutex_unlock(&local->key_mtx);
 295         mutex_unlock(&local->sta_mtx);
 296
 297         return ret;
 298 }
 299
 300 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 301                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 302                              void *cookie,
 303                              void (*callback)(void *cookie,
 304                                               struct key_params *params))
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         struct sta_info *sta = NULL;
 308         u8 seq[6] = {0};
 309         struct key_params params;
 310         struct ieee80211_key *key = NULL;
 311         u64 pn64;
 312         u32 iv32;
 313         u16 iv16;
 314         int err = -ENOENT;
 315         struct ieee80211_key_seq kseq = {};
 316
 317         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 318
 319         rcu_read_lock();
 320
 321         if (mac_addr) {
 322                 sta = sta_info_get_bss(sdata, mac_addr);
 323                 if (!sta)
 324                         goto out;
 325
 326                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 327                         key = rcu_dereference(sta->ptk[key_idx]);
 328                 else if (!pairwise &&
 329                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 330                         key = rcu_dereference(sta->gtk[key_idx]);
 331         } else
 332                 key = rcu_dereference(sdata->keys[key_idx]);
 333
 334         if (!key)
 335                 goto out;
 336
 337         memset(&params, 0, sizeof(params));
 338
 339         params.cipher = key->conf.cipher;
 340
 341         switch (key->conf.cipher) {
 342         case WLAN_CIPHER_SUITE_TKIP:
 343                 iv32 = key->u.tkip.tx.iv32;
 344                 iv16 = key->u.tkip.tx.iv16;
 345
 346                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 347                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 348                         drv_get_key_seq(sdata->local, key, &kseq);
 349                         iv32 = kseq.tkip.iv32;
 350                         iv16 = kseq.tkip.iv16;
 351                 }
 352
 353                 seq[0] = iv16 & 0xff;
 354                 seq[1] = (iv16 >> 8) & 0xff;
 355                 seq[2] = iv32 & 0xff;
 356                 seq[3] = (iv32 >> 8) & 0xff;
 357                 seq[4] = (iv32 >> 16) & 0xff;
 358                 seq[5] = (iv32 >> 24) & 0xff;
 359                 params.seq = seq;
 360                 params.seq_len = 6;
 361                 break;
 362         case WLAN_CIPHER_SUITE_CCMP:
 363         case WLAN_CIPHER_SUITE_CCMP_256:
 364         case WLAN_CIPHER_SUITE_AES_CMAC:
 365         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 366                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 367                              offsetof(typeof(kseq), aes_cmac));
 368         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 369         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 370                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 371                              offsetof(typeof(kseq), aes_gmac));
 372         case WLAN_CIPHER_SUITE_GCMP:
 373         case WLAN_CIPHER_SUITE_GCMP_256:
 374                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 375                              offsetof(typeof(kseq), gcmp));
 376
 377                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 378                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 379                         drv_get_key_seq(sdata->local, key, &kseq);
 380                         memcpy(seq, kseq.ccmp.pn, 6);
 381                 } else {
 382                         pn64 = atomic64_read(&key->conf.tx_pn);
 383                         seq[0] = pn64;
 384                         seq[1] = pn64 >> 8;
 385                         seq[2] = pn64 >> 16;
 386                         seq[3] = pn64 >> 24;
 387                         seq[4] = pn64 >> 32;
 388                         seq[5] = pn64 >> 40;
 389                 }
 390                 params.seq = seq;
 391                 params.seq_len = 6;
 392                 break;
 393         default:
 394                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 395                         break;
 396                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 397                         break;
 398                 drv_get_key_seq(sdata->local, key, &kseq);
 399                 params.seq = kseq.hw.seq;
 400                 params.seq_len = kseq.hw.seq_len;
 401                 break;
 402         }
 403
 404         params.key = key->conf.key;
 405         params.key_len = key->conf.keylen;
 406
 407         callback(cookie, &params);
 408         err = 0;
 409
 410  out:
 411         rcu_read_unlock();
 412         return err;
 413 }
 414
 415 static int ieee80211_config_default_key(struct wiphy *wiphy,
 416                                         struct net_device *dev,
 417                                         u8 key_idx, bool uni,
 418                                         bool multi)
 419 {
 420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 421
 422         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 423
 424         return 0;
 425 }
 426
 427 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 428                                              struct net_device *dev,
 429                                              u8 key_idx)
 430 {
 431         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 432
 433         ieee80211_set_default_mgmt_key(sdata, key_idx);
 434
 435         return 0;
 436 }
 437
 438 void sta_set_rate_info_tx(struct sta_info *sta,
 439                           const struct ieee80211_tx_rate *rate,
 440                           struct rate_info *rinfo)
 441 {
 442         rinfo->flags = 0;
 443         if (rate->flags & IEEE80211_TX_RC_MCS) {
 444                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 445                 rinfo->mcs = rate->idx;
 446         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 447                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 448                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 449                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 450         } else {
 451                 struct ieee80211_supported_band *sband;
 452                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 453                 u16 brate;
 454
 455                 sband = sta->local->hw.wiphy->bands[
 456                                 ieee80211_get_sdata_band(sta->sdata)];
 457                 brate = sband->bitrates[rate->idx].bitrate;
 458                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 459         }
 460         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 461                 rinfo->bw = RATE_INFO_BW_40;
 462         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 463                 rinfo->bw = RATE_INFO_BW_80;
 464         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 465                 rinfo->bw = RATE_INFO_BW_160;
 466         else
 467                 rinfo->bw = RATE_INFO_BW_20;
 468         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 469                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 470 }
 471
 472 void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
 473 {
 474         rinfo->flags = 0;
 475
 476         if (sta->last_rx_rate_flag & RX_FLAG_HT) {
 477                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 478                 rinfo->mcs = sta->last_rx_rate_idx;
 479         } else if (sta->last_rx_rate_flag & RX_FLAG_VHT) {
 480                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 481                 rinfo->nss = sta->last_rx_rate_vht_nss;
 482                 rinfo->mcs = sta->last_rx_rate_idx;
 483         } else {
 484                 struct ieee80211_supported_band *sband;
 485                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 486                 u16 brate;
 487
 488                 sband = sta->local->hw.wiphy->bands[
 489                                 ieee80211_get_sdata_band(sta->sdata)];
 490                 brate = sband->bitrates[sta->last_rx_rate_idx].bitrate;
 491                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 492         }
 493
 494         if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
 495                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 496
 497         if (sta->last_rx_rate_flag & RX_FLAG_5MHZ)
 498                 rinfo->bw = RATE_INFO_BW_5;
 499         else if (sta->last_rx_rate_flag & RX_FLAG_10MHZ)
 500                 rinfo->bw = RATE_INFO_BW_10;
 501         else if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
 502                 rinfo->bw = RATE_INFO_BW_40;
 503         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_80MHZ)
 504                 rinfo->bw = RATE_INFO_BW_80;
 505         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_160MHZ)
 506                 rinfo->bw = RATE_INFO_BW_160;
 507         else
 508                 rinfo->bw = RATE_INFO_BW_20;
 509 }
 510
 511 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 512                                   int idx, u8 *mac, struct station_info *sinfo)
 513 {
 514         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         struct ieee80211_local *local = sdata->local;
 516         struct sta_info *sta;
 517         int ret = -ENOENT;
 518
 519         mutex_lock(&local->sta_mtx);
 520
 521         sta = sta_info_get_by_idx(sdata, idx);
 522         if (sta) {
 523                 ret = 0;
 524                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 525                 sta_set_sinfo(sta, sinfo);
 526         }
 527
 528         mutex_unlock(&local->sta_mtx);
 529
 530         return ret;
 531 }
 532
 533 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 534                                  int idx, struct survey_info *survey)
 535 {
 536         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 537
 538         return drv_get_survey(local, idx, survey);
 539 }
 540
 541 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 542                                  const u8 *mac, struct station_info *sinfo)
 543 {
 544         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 545         struct ieee80211_local *local = sdata->local;
 546         struct sta_info *sta;
 547         int ret = -ENOENT;
 548
 549         mutex_lock(&local->sta_mtx);
 550
 551         sta = sta_info_get_bss(sdata, mac);
 552         if (sta) {
 553                 ret = 0;
 554                 sta_set_sinfo(sta, sinfo);
 555         }
 556
 557         mutex_unlock(&local->sta_mtx);
 558
 559         return ret;
 560 }
 561
 562 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 563                                          struct cfg80211_chan_def *chandef)
 564 {
 565         struct ieee80211_local *local = wiphy_priv(wiphy);
 566         struct ieee80211_sub_if_data *sdata;
 567         int ret = 0;
 568
 569         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 570                 return 0;
 571
 572         mutex_lock(&local->mtx);
 573         mutex_lock(&local->iflist_mtx);
 574         if (local->use_chanctx) {
 575                 sdata = rcu_dereference_protected(
 576                                 local->monitor_sdata,
 577                                 lockdep_is_held(&local->iflist_mtx));
 578                 if (sdata) {
 579                         ieee80211_vif_release_channel(sdata);
 580                         ret = ieee80211_vif_use_channel(sdata, chandef,
 581                                         IEEE80211_CHANCTX_EXCLUSIVE);
 582                 }
 583         } else if (local->open_count == local->monitors) {
 584                 local->_oper_chandef = *chandef;
 585                 ieee80211_hw_config(local, 0);
 586         }
 587
 588         if (ret == 0)
 589                 local->monitor_chandef = *chandef;
 590         mutex_unlock(&local->iflist_mtx);
 591         mutex_unlock(&local->mtx);
 592
 593         return ret;
 594 }
 595
 596 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 597                                     const u8 *resp, size_t resp_len,
 598                                     const struct ieee80211_csa_settings *csa)
 599 {
 600         struct probe_resp *new, *old;
 601
 602         if (!resp || !resp_len)
 603                 return 1;
 604
 605         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 606
 607         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 608         if (!new)
 609                 return -ENOMEM;
 610
 611         new->len = resp_len;
 612         memcpy(new->data, resp, resp_len);
 613
 614         if (csa)
 615                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 616                        csa->n_counter_offsets_presp *
 617                        sizeof(new->csa_counter_offsets[0]));
 618
 619         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 620         if (old)
 621                 kfree_rcu(old, rcu_head);
 622
 623         return 0;
 624 }
 625
 626 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 627                                    struct cfg80211_beacon_data *params,
 628                                    const struct ieee80211_csa_settings *csa)
 629 {
 630         struct beacon_data *new, *old;
 631         int new_head_len, new_tail_len;
 632         int size, err;
 633         u32 changed = BSS_CHANGED_BEACON;
 634
 635         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 636
 637
 638         /* Need to have a beacon head if we don't have one yet */
 639         if (!params->head && !old)
 640                 return -EINVAL;
 641
 642         /* new or old head? */
 643         if (params->head)
 644                 new_head_len = params->head_len;
 645         else
 646                 new_head_len = old->head_len;
 647
 648         /* new or old tail? */
 649         if (params->tail || !old)
 650                 /* params->tail_len will be zero for !params->tail */
 651                 new_tail_len = params->tail_len;
 652         else
 653                 new_tail_len = old->tail_len;
 654
 655         size = sizeof(*new) + new_head_len + new_tail_len;
 656
 657         new = kzalloc(size, GFP_KERNEL);
 658         if (!new)
 659                 return -ENOMEM;
 660
 661         /* start filling the new info now */
 662
 663         /*
 664          * pointers go into the block we allocated,
 665          * memory is | beacon_data | head | tail |
 666          */
 667         new->head = ((u8 *) new) + sizeof(*new);
 668         new->tail = new->head + new_head_len;
 669         new->head_len = new_head_len;
 670         new->tail_len = new_tail_len;
 671
 672         if (csa) {
 673                 new->csa_current_counter = csa->count;
 674                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 675                        csa->n_counter_offsets_beacon *
 676                        sizeof(new->csa_counter_offsets[0]));
 677         }
 678
 679         /* copy in head */
 680         if (params->head)
 681                 memcpy(new->head, params->head, new_head_len);
 682         else
 683                 memcpy(new->head, old->head, new_head_len);
 684
 685         /* copy in optional tail */
 686         if (params->tail)
 687                 memcpy(new->tail, params->tail, new_tail_len);
 688         else
 689                 if (old)
 690                         memcpy(new->tail, old->tail, new_tail_len);
 691
 692         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 693                                        params->probe_resp_len, csa);
 694         if (err < 0)
 695                 return err;
 696         if (err == 0)
 697                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 698
 699         rcu_assign_pointer(sdata->u.ap.beacon, new);
 700
 701         if (old)
 702                 kfree_rcu(old, rcu_head);
 703
 704         return changed;
 705 }
 706
 707 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 708                               struct cfg80211_ap_settings *params)
 709 {
 710         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 711         struct ieee80211_local *local = sdata->local;
 712         struct beacon_data *old;
 713         struct ieee80211_sub_if_data *vlan;
 714         u32 changed = BSS_CHANGED_BEACON_INT |
 715                       BSS_CHANGED_BEACON_ENABLED |
 716                       BSS_CHANGED_BEACON |
 717                       BSS_CHANGED_SSID |
 718                       BSS_CHANGED_P2P_PS |
 719                       BSS_CHANGED_TXPOWER;
 720         int err;
 721
 722         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 723         if (old)
 724                 return -EALREADY;
 725
 726         switch (params->smps_mode) {
 727         case NL80211_SMPS_OFF:
 728                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 729                 break;
 730         case NL80211_SMPS_STATIC:
 731                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 732                 break;
 733         case NL80211_SMPS_DYNAMIC:
 734                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 735                 break;
 736         default:
 737                 return -EINVAL;
 738         }
 739         sdata->needed_rx_chains = sdata->local->rx_chains;
 740
 741         mutex_lock(&local->mtx);
 742         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 743                                         IEEE80211_CHANCTX_SHARED);
 744         if (!err)
 745                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 746         mutex_unlock(&local->mtx);
 747         if (err)
 748                 return err;
 749
 750         /*
 751          * Apply control port protocol, this allows us to
 752          * not encrypt dynamic WEP control frames.
 753          */
 754         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 755         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 756         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 757                                                         &params->crypto,
 758                                                         sdata->vif.type);
 759
 760         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 761                 vlan->control_port_protocol =
 762                         params->crypto.control_port_ethertype;
 763                 vlan->control_port_no_encrypt =
 764                         params->crypto.control_port_no_encrypt;
 765                 vlan->encrypt_headroom =
 766                         ieee80211_cs_headroom(sdata->local,
 767                                               &params->crypto,
 768                                               vlan->vif.type);
 769         }
 770
 771         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 772         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 773         sdata->vif.bss_conf.enable_beacon = true;
 774
 775         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 776         if (params->ssid_len)
 777                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 778                        params->ssid_len);
 779         sdata->vif.bss_conf.hidden_ssid =
 780                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 781
 782         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 783                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 784         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 785                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 786         if (params->p2p_opp_ps)
 787                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 788                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 789
 790         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 791         if (err < 0) {
 792                 ieee80211_vif_release_channel(sdata);
 793                 return err;
 794         }
 795         changed |= err;
 796
 797         err = drv_start_ap(sdata->local, sdata);
 798         if (err) {
 799                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 800
 801                 if (old)
 802                         kfree_rcu(old, rcu_head);
 803                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 804                 ieee80211_vif_release_channel(sdata);
 805                 return err;
 806         }
 807
 808         ieee80211_recalc_dtim(local, sdata);
 809         ieee80211_bss_info_change_notify(sdata, changed);
 810
 811         netif_carrier_on(dev);
 812         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 813                 netif_carrier_on(vlan->dev);
 814
 815         return 0;
 816 }
 817
 818 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 819                                    struct cfg80211_beacon_data *params)
 820 {
 821         struct ieee80211_sub_if_data *sdata;
 822         struct beacon_data *old;
 823         int err;
 824
 825         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 826         sdata_assert_lock(sdata);
 827
 828         /* don't allow changing the beacon while CSA is in place - offset
 829          * of channel switch counter may change
 830          */
 831         if (sdata->vif.csa_active)
 832                 return -EBUSY;
 833
 834         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 835         if (!old)
 836                 return -ENOENT;
 837
 838         err = ieee80211_assign_beacon(sdata, params, NULL);
 839         if (err < 0)
 840                 return err;
 841         ieee80211_bss_info_change_notify(sdata, err);
 842         return 0;
 843 }
 844
 845 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 846 {
 847         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 848         struct ieee80211_sub_if_data *vlan;
 849         struct ieee80211_local *local = sdata->local;
 850         struct beacon_data *old_beacon;
 851         struct probe_resp *old_probe_resp;
 852         struct cfg80211_chan_def chandef;
 853
 854         sdata_assert_lock(sdata);
 855
 856         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 857         if (!old_beacon)
 858                 return -ENOENT;
 859         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 860
 861         /* abort any running channel switch */
 862         mutex_lock(&local->mtx);
 863         sdata->vif.csa_active = false;
 864         if (sdata->csa_block_tx) {
 865                 ieee80211_wake_vif_queues(local, sdata,
 866                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 867                 sdata->csa_block_tx = false;
 868         }
 869
 870         mutex_unlock(&local->mtx);
 871
 872         kfree(sdata->u.ap.next_beacon);
 873         sdata->u.ap.next_beacon = NULL;
 874
 875         /* turn off carrier for this interface and dependent VLANs */
 876         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 877                 netif_carrier_off(vlan->dev);
 878         netif_carrier_off(dev);
 879
 880         /* remove beacon and probe response */
 881         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 882         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 883         kfree_rcu(old_beacon, rcu_head);
 884         if (old_probe_resp)
 885                 kfree_rcu(old_probe_resp, rcu_head);
 886         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 887
 888         __sta_info_flush(sdata, true);
 889         ieee80211_free_keys(sdata, true);
 890
 891         sdata->vif.bss_conf.enable_beacon = false;
 892         sdata->vif.bss_conf.ssid_len = 0;
 893         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 894         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 895
 896         if (sdata->wdev.cac_started) {
 897                 chandef = sdata->vif.bss_conf.chandef;
 898                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 899                 cfg80211_cac_event(sdata->dev, &chandef,
 900                                    NL80211_RADAR_CAC_ABORTED,
 901                                    GFP_KERNEL);
 902         }
 903
 904         drv_stop_ap(sdata->local, sdata);
 905
 906         /* free all potentially still buffered bcast frames */
 907         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 908         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 909
 910         mutex_lock(&local->mtx);
 911         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 912         ieee80211_vif_release_channel(sdata);
 913         mutex_unlock(&local->mtx);
 914
 915         return 0;
 916 }
 917
 918 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 919 struct iapp_layer2_update {
 920         u8 da[ETH_ALEN];        /* broadcast */
 921         u8 sa[ETH_ALEN];        /* STA addr */
 922         __be16 len;             /* 6 */
 923         u8 dsap;                /* 0 */
 924         u8 ssap;                /* 0 */
 925         u8 control;
 926         u8 xid_info[3];
 927 } __packed;
 928
 929 static void ieee80211_send_layer2_update(struct sta_info *sta)
 930 {
 931         struct iapp_layer2_update *msg;
 932         struct sk_buff *skb;
 933
 934         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 935          * bridge devices */
 936
 937         skb = dev_alloc_skb(sizeof(*msg));
 938         if (!skb)
 939                 return;
 940         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 941
 942         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 943          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 944
 945         eth_broadcast_addr(msg->da);
 946         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 947         msg->len = htons(6);
 948         msg->dsap = 0;
 949         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 950         msg->control = 0xaf;    /* XID response lsb.1111F101.
 951                                  * F=0 (no poll command; unsolicited frame) */
 952         msg->xid_info[0] = 0x81;        /* XID format identifier */
 953         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 954         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 955
 956         skb->dev = sta->sdata->dev;
 957         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 958         memset(skb->cb, 0, sizeof(skb->cb));
 959         netif_rx_ni(skb);
 960 }
 961
 962 static int sta_apply_auth_flags(struct ieee80211_local *local,
 963                                 struct sta_info *sta,
 964                                 u32 mask, u32 set)
 965 {
 966         int ret;
 967
 968         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 969             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 970             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 971                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 972                 if (ret)
 973                         return ret;
 974         }
 975
 976         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 977             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 978             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 979                 /*
 980                  * When peer becomes associated, init rate control as
 981                  * well. Some drivers require rate control initialized
 982                  * before drv_sta_state() is called.
 983                  */
 984                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
 985                         rate_control_rate_init(sta);
 986
 987                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 988                 if (ret)
 989                         return ret;
 990         }
 991
 992         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 993                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 994                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 995                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 996                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 997                 else
 998                         ret = 0;
 999                 if (ret)
1000                         return ret;
1001         }
1002
1003         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
1004             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1005             test_sta_flag(sta, WLAN_STA_ASSOC)) {
1006                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1007                 if (ret)
1008                         return ret;
1009         }
1010
1011         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1012             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
1013             test_sta_flag(sta, WLAN_STA_AUTH)) {
1014                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
1015                 if (ret)
1016                         return ret;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static int sta_apply_parameters(struct ieee80211_local *local,
1023                                 struct sta_info *sta,
1024                                 struct station_parameters *params)
1025 {
1026         int ret = 0;
1027         struct ieee80211_supported_band *sband;
1028         struct ieee80211_sub_if_data *sdata = sta->sdata;
1029         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1030         u32 mask, set;
1031
1032         sband = local->hw.wiphy->bands[band];
1033
1034         mask = params->sta_flags_mask;
1035         set = params->sta_flags_set;
1036
1037         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1038                 /*
1039                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1040                  * API but must follow AUTHENTICATED for driver state.
1041                  */
1042                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1043                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1044                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1045                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1046         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1047                 /*
1048                  * TDLS -- everything follows authorized, but
1049                  * only becoming authorized is possible, not
1050                  * going back
1051                  */
1052                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1053                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1054                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1055                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1056                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1057                 }
1058         }
1059
1060         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1061             local->hw.queues >= IEEE80211_NUM_ACS)
1062                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1063
1064         /* auth flags will be set later for TDLS stations */
1065         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1066                 ret = sta_apply_auth_flags(local, sta, mask, set);
1067                 if (ret)
1068                         return ret;
1069         }
1070
1071         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1072                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1073                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1074                 else
1075                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1076         }
1077
1078         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1079                 if (set & BIT(NL80211_STA_FLAG_MFP))
1080                         set_sta_flag(sta, WLAN_STA_MFP);
1081                 else
1082                         clear_sta_flag(sta, WLAN_STA_MFP);
1083         }
1084
1085         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1086                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1087                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1088                 else
1089                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1090         }
1091
1092         /* mark TDLS channel switch support, if the AP allows it */
1093         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1094             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1095             params->ext_capab_len >= 4 &&
1096             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1097                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1098
1099         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1100                 sta->sta.uapsd_queues = params->uapsd_queues;
1101                 sta->sta.max_sp = params->max_sp;
1102         }
1103
1104         /*
1105          * cfg80211 validates this (1-2007) and allows setting the AID
1106          * only when creating a new station entry
1107          */
1108         if (params->aid)
1109                 sta->sta.aid = params->aid;
1110
1111         /*
1112          * Some of the following updates would be racy if called on an
1113          * existing station, via ieee80211_change_station(). However,
1114          * all such changes are rejected by cfg80211 except for updates
1115          * changing the supported rates on an existing but not yet used
1116          * TDLS peer.
1117          */
1118
1119         if (params->listen_interval >= 0)
1120                 sta->listen_interval = params->listen_interval;
1121
1122         if (params->supported_rates) {
1123                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1124                                          sband, params->supported_rates,
1125                                          params->supported_rates_len,
1126                                          &sta->sta.supp_rates[band]);
1127         }
1128
1129         if (params->ht_capa)
1130                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1131                                                   params->ht_capa, sta);
1132
1133         if (params->vht_capa)
1134                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1135                                                     params->vht_capa, sta);
1136
1137         if (params->opmode_notif_used) {
1138                 /* returned value is only needed for rc update, but the
1139                  * rc isn't initialized here yet, so ignore it
1140                  */
1141                 __ieee80211_vht_handle_opmode(sdata, sta,
1142                                               params->opmode_notif,
1143                                               band, false);
1144         }
1145
1146         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1147 #ifdef CONFIG_MAC80211_MESH
1148                 u32 changed = 0;
1149
1150                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
1151                         switch (params->plink_state) {
1152                         case NL80211_PLINK_ESTAB:
1153                                 if (sta->plink_state != NL80211_PLINK_ESTAB)
1154                                         changed = mesh_plink_inc_estab_count(
1155                                                         sdata);
1156                                 sta->plink_state = params->plink_state;
1157
1158                                 ieee80211_mps_sta_status_update(sta);
1159                                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1160                                               sdata->u.mesh.mshcfg.power_mode);
1161                                 break;
1162                         case NL80211_PLINK_LISTEN:
1163                         case NL80211_PLINK_BLOCKED:
1164                         case NL80211_PLINK_OPN_SNT:
1165                         case NL80211_PLINK_OPN_RCVD:
1166                         case NL80211_PLINK_CNF_RCVD:
1167                         case NL80211_PLINK_HOLDING:
1168                                 if (sta->plink_state == NL80211_PLINK_ESTAB)
1169                                         changed = mesh_plink_dec_estab_count(
1170                                                         sdata);
1171                                 sta->plink_state = params->plink_state;
1172
1173                                 ieee80211_mps_sta_status_update(sta);
1174                                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1175                                                 NL80211_MESH_POWER_UNKNOWN);
1176                                 break;
1177                         default:
1178                                 /*  nothing  */
1179                                 break;
1180                         }
1181                 }
1182
1183                 switch (params->plink_action) {
1184                 case NL80211_PLINK_ACTION_NO_ACTION:
1185                         /* nothing */
1186                         break;
1187                 case NL80211_PLINK_ACTION_OPEN:
1188                         changed |= mesh_plink_open(sta);
1189                         break;
1190                 case NL80211_PLINK_ACTION_BLOCK:
1191                         changed |= mesh_plink_block(sta);
1192                         break;
1193                 }
1194
1195                 if (params->local_pm)
1196                         changed |=
1197                               ieee80211_mps_set_sta_local_pm(sta,
1198                                                              params->local_pm);
1199                 ieee80211_mbss_info_change_notify(sdata, changed);
1200 #endif
1201         }
1202
1203         /* set the STA state after all sta info from usermode has been set */
1204         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1205                 ret = sta_apply_auth_flags(local, sta, mask, set);
1206                 if (ret)
1207                         return ret;
1208         }
1209
1210         return 0;
1211 }
1212
1213 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1214                                  const u8 *mac,
1215                                  struct station_parameters *params)
1216 {
1217         struct ieee80211_local *local = wiphy_priv(wiphy);
1218         struct sta_info *sta;
1219         struct ieee80211_sub_if_data *sdata;
1220         int err;
1221         int layer2_update;
1222
1223         if (params->vlan) {
1224                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1225
1226                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1227                     sdata->vif.type != NL80211_IFTYPE_AP)
1228                         return -EINVAL;
1229         } else
1230                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1231
1232         if (ether_addr_equal(mac, sdata->vif.addr))
1233                 return -EINVAL;
1234
1235         if (is_multicast_ether_addr(mac))
1236                 return -EINVAL;
1237
1238         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1239         if (!sta)
1240                 return -ENOMEM;
1241
1242         /*
1243          * defaults -- if userspace wants something else we'll
1244          * change it accordingly in sta_apply_parameters()
1245          */
1246         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) {
1247                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1248                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1249         } else {
1250                 sta->sta.tdls = true;
1251         }
1252
1253         err = sta_apply_parameters(local, sta, params);
1254         if (err) {
1255                 sta_info_free(local, sta);
1256                 return err;
1257         }
1258
1259         /*
1260          * for TDLS, rate control should be initialized only when
1261          * rates are known and station is marked authorized
1262          */
1263         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1264                 rate_control_rate_init(sta);
1265
1266         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1267                 sdata->vif.type == NL80211_IFTYPE_AP;
1268
1269         err = sta_info_insert_rcu(sta);
1270         if (err) {
1271                 rcu_read_unlock();
1272                 return err;
1273         }
1274
1275         if (layer2_update)
1276                 ieee80211_send_layer2_update(sta);
1277
1278         rcu_read_unlock();
1279
1280         return 0;
1281 }
1282
1283 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1284                                  struct station_del_parameters *params)
1285 {
1286         struct ieee80211_sub_if_data *sdata;
1287
1288         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1289
1290         if (params->mac)
1291                 return sta_info_destroy_addr_bss(sdata, params->mac);
1292
1293         sta_info_flush(sdata);
1294         return 0;
1295 }
1296
1297 static int ieee80211_change_station(struct wiphy *wiphy,
1298                                     struct net_device *dev, const u8 *mac,
1299                                     struct station_parameters *params)
1300 {
1301         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1302         struct ieee80211_local *local = wiphy_priv(wiphy);
1303         struct sta_info *sta;
1304         struct ieee80211_sub_if_data *vlansdata;
1305         enum cfg80211_station_type statype;
1306         int err;
1307
1308         mutex_lock(&local->sta_mtx);
1309
1310         sta = sta_info_get_bss(sdata, mac);
1311         if (!sta) {
1312                 err = -ENOENT;
1313                 goto out_err;
1314         }
1315
1316         switch (sdata->vif.type) {
1317         case NL80211_IFTYPE_MESH_POINT:
1318                 if (sdata->u.mesh.user_mpm)
1319                         statype = CFG80211_STA_MESH_PEER_USER;
1320                 else
1321                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1322                 break;
1323         case NL80211_IFTYPE_ADHOC:
1324                 statype = CFG80211_STA_IBSS;
1325                 break;
1326         case NL80211_IFTYPE_STATION:
1327                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1328                         statype = CFG80211_STA_AP_STA;
1329                         break;
1330                 }
1331                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1332                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1333                 else
1334                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1335                 break;
1336         case NL80211_IFTYPE_AP:
1337         case NL80211_IFTYPE_AP_VLAN:
1338                 statype = CFG80211_STA_AP_CLIENT;
1339                 break;
1340         default:
1341                 err = -EOPNOTSUPP;
1342                 goto out_err;
1343         }
1344
1345         err = cfg80211_check_station_change(wiphy, params, statype);
1346         if (err)
1347                 goto out_err;
1348
1349         if (params->vlan && params->vlan != sta->sdata->dev) {
1350                 bool prev_4addr = false;
1351                 bool new_4addr = false;
1352
1353                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1354
1355                 if (params->vlan->ieee80211_ptr->use_4addr) {
1356                         if (vlansdata->u.vlan.sta) {
1357                                 err = -EBUSY;
1358                                 goto out_err;
1359                         }
1360
1361                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1362                         new_4addr = true;
1363                 }
1364
1365                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1366                     sta->sdata->u.vlan.sta) {
1367                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1368                         prev_4addr = true;
1369                 }
1370
1371                 sta->sdata = vlansdata;
1372                 ieee80211_check_fast_xmit(sta);
1373
1374                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1375                     prev_4addr != new_4addr) {
1376                         if (new_4addr)
1377                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1378                         else
1379                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1380                 }
1381
1382                 ieee80211_send_layer2_update(sta);
1383         }
1384
1385         err = sta_apply_parameters(local, sta, params);
1386         if (err)
1387                 goto out_err;
1388
1389         mutex_unlock(&local->sta_mtx);
1390
1391         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1392              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1393             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1394             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1395             sta_info_tx_streams(sta) != 1) {
1396                 ht_dbg(sta->sdata,
1397                        "%pM just authorized and MIMO capable - update SMPS\n",
1398                        sta->sta.addr);
1399                 ieee80211_send_smps_action(sta->sdata,
1400                         sta->sdata->bss->req_smps,
1401                         sta->sta.addr,
1402                         sta->sdata->vif.bss_conf.bssid);
1403         }
1404
1405         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1406             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1407                 ieee80211_recalc_ps(local, -1);
1408                 ieee80211_recalc_ps_vif(sdata);
1409         }
1410
1411         return 0;
1412 out_err:
1413         mutex_unlock(&local->sta_mtx);
1414         return err;
1415 }
1416
1417 #ifdef CONFIG_MAC80211_MESH
1418 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1419                                const u8 *dst, const u8 *next_hop)
1420 {
1421         struct ieee80211_sub_if_data *sdata;
1422         struct mesh_path *mpath;
1423         struct sta_info *sta;
1424
1425         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1426
1427         rcu_read_lock();
1428         sta = sta_info_get(sdata, next_hop);
1429         if (!sta) {
1430                 rcu_read_unlock();
1431                 return -ENOENT;
1432         }
1433
1434         mpath = mesh_path_add(sdata, dst);
1435         if (IS_ERR(mpath)) {
1436                 rcu_read_unlock();
1437                 return PTR_ERR(mpath);
1438         }
1439
1440         mesh_path_fix_nexthop(mpath, sta);
1441
1442         rcu_read_unlock();
1443         return 0;
1444 }
1445
1446 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1447                                const u8 *dst)
1448 {
1449         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1450
1451         if (dst)
1452                 return mesh_path_del(sdata, dst);
1453
1454         mesh_path_flush_by_iface(sdata);
1455         return 0;
1456 }
1457
1458 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1459                                   const u8 *dst, const u8 *next_hop)
1460 {
1461         struct ieee80211_sub_if_data *sdata;
1462         struct mesh_path *mpath;
1463         struct sta_info *sta;
1464
1465         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1466
1467         rcu_read_lock();
1468
1469         sta = sta_info_get(sdata, next_hop);
1470         if (!sta) {
1471                 rcu_read_unlock();
1472                 return -ENOENT;
1473         }
1474
1475         mpath = mesh_path_lookup(sdata, dst);
1476         if (!mpath) {
1477                 rcu_read_unlock();
1478                 return -ENOENT;
1479         }
1480
1481         mesh_path_fix_nexthop(mpath, sta);
1482
1483         rcu_read_unlock();
1484         return 0;
1485 }
1486
1487 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1488                             struct mpath_info *pinfo)
1489 {
1490         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1491
1492         if (next_hop_sta)
1493                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1494         else
1495                 eth_zero_addr(next_hop);
1496
1497         memset(pinfo, 0, sizeof(*pinfo));
1498
1499         pinfo->generation = mesh_paths_generation;
1500
1501         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1502                         MPATH_INFO_SN |
1503                         MPATH_INFO_METRIC |
1504                         MPATH_INFO_EXPTIME |
1505                         MPATH_INFO_DISCOVERY_TIMEOUT |
1506                         MPATH_INFO_DISCOVERY_RETRIES |
1507                         MPATH_INFO_FLAGS;
1508
1509         pinfo->frame_qlen = mpath->frame_queue.qlen;
1510         pinfo->sn = mpath->sn;
1511         pinfo->metric = mpath->metric;
1512         if (time_before(jiffies, mpath->exp_time))
1513                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1514         pinfo->discovery_timeout =
1515                         jiffies_to_msecs(mpath->discovery_timeout);
1516         pinfo->discovery_retries = mpath->discovery_retries;
1517         if (mpath->flags & MESH_PATH_ACTIVE)
1518                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1519         if (mpath->flags & MESH_PATH_RESOLVING)
1520                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1521         if (mpath->flags & MESH_PATH_SN_VALID)
1522                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1523         if (mpath->flags & MESH_PATH_FIXED)
1524                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1525         if (mpath->flags & MESH_PATH_RESOLVED)
1526                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1527 }
1528
1529 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1530                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1531
1532 {
1533         struct ieee80211_sub_if_data *sdata;
1534         struct mesh_path *mpath;
1535
1536         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1537
1538         rcu_read_lock();
1539         mpath = mesh_path_lookup(sdata, dst);
1540         if (!mpath) {
1541                 rcu_read_unlock();
1542                 return -ENOENT;
1543         }
1544         memcpy(dst, mpath->dst, ETH_ALEN);
1545         mpath_set_pinfo(mpath, next_hop, pinfo);
1546         rcu_read_unlock();
1547         return 0;
1548 }
1549
1550 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1551                                 int idx, u8 *dst, u8 *next_hop,
1552                                 struct mpath_info *pinfo)
1553 {
1554         struct ieee80211_sub_if_data *sdata;
1555         struct mesh_path *mpath;
1556
1557         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1558
1559         rcu_read_lock();
1560         mpath = mesh_path_lookup_by_idx(sdata, idx);
1561         if (!mpath) {
1562                 rcu_read_unlock();
1563                 return -ENOENT;
1564         }
1565         memcpy(dst, mpath->dst, ETH_ALEN);
1566         mpath_set_pinfo(mpath, next_hop, pinfo);
1567         rcu_read_unlock();
1568         return 0;
1569 }
1570
1571 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1572                           struct mpath_info *pinfo)
1573 {
1574         memset(pinfo, 0, sizeof(*pinfo));
1575         memcpy(mpp, mpath->mpp, ETH_ALEN);
1576
1577         pinfo->generation = mpp_paths_generation;
1578 }
1579
1580 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1581                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1582
1583 {
1584         struct ieee80211_sub_if_data *sdata;
1585         struct mesh_path *mpath;
1586
1587         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1588
1589         rcu_read_lock();
1590         mpath = mpp_path_lookup(sdata, dst);
1591         if (!mpath) {
1592                 rcu_read_unlock();
1593                 return -ENOENT;
1594         }
1595         memcpy(dst, mpath->dst, ETH_ALEN);
1596         mpp_set_pinfo(mpath, mpp, pinfo);
1597         rcu_read_unlock();
1598         return 0;
1599 }
1600
1601 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1602                               int idx, u8 *dst, u8 *mpp,
1603                               struct mpath_info *pinfo)
1604 {
1605         struct ieee80211_sub_if_data *sdata;
1606         struct mesh_path *mpath;
1607
1608         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1609
1610         rcu_read_lock();
1611         mpath = mpp_path_lookup_by_idx(sdata, idx);
1612         if (!mpath) {
1613                 rcu_read_unlock();
1614                 return -ENOENT;
1615         }
1616         memcpy(dst, mpath->dst, ETH_ALEN);
1617         mpp_set_pinfo(mpath, mpp, pinfo);
1618         rcu_read_unlock();
1619         return 0;
1620 }
1621
1622 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1623                                 struct net_device *dev,
1624                                 struct mesh_config *conf)
1625 {
1626         struct ieee80211_sub_if_data *sdata;
1627         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1628
1629         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1630         return 0;
1631 }
1632
1633 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1634 {
1635         return (mask >> (parm-1)) & 0x1;
1636 }
1637
1638 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1639                 const struct mesh_setup *setup)
1640 {
1641         u8 *new_ie;
1642         const u8 *old_ie;
1643         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1644                                         struct ieee80211_sub_if_data, u.mesh);
1645
1646         /* allocate information elements */
1647         new_ie = NULL;
1648         old_ie = ifmsh->ie;
1649
1650         if (setup->ie_len) {
1651                 new_ie = kmemdup(setup->ie, setup->ie_len,
1652                                 GFP_KERNEL);
1653                 if (!new_ie)
1654                         return -ENOMEM;
1655         }
1656         ifmsh->ie_len = setup->ie_len;
1657         ifmsh->ie = new_ie;
1658         kfree(old_ie);
1659
1660         /* now copy the rest of the setup parameters */
1661         ifmsh->mesh_id_len = setup->mesh_id_len;
1662         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1663         ifmsh->mesh_sp_id = setup->sync_method;
1664         ifmsh->mesh_pp_id = setup->path_sel_proto;
1665         ifmsh->mesh_pm_id = setup->path_metric;
1666         ifmsh->user_mpm = setup->user_mpm;
1667         ifmsh->mesh_auth_id = setup->auth_id;
1668         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1669         if (setup->is_authenticated)
1670                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1671         if (setup->is_secure)
1672                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1673
1674         /* mcast rate setting in Mesh Node */
1675         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1676                                                 sizeof(setup->mcast_rate));
1677         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1678
1679         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1680         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1681
1682         return 0;
1683 }
1684
1685 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1686                                         struct net_device *dev, u32 mask,
1687                                         const struct mesh_config *nconf)
1688 {
1689         struct mesh_config *conf;
1690         struct ieee80211_sub_if_data *sdata;
1691         struct ieee80211_if_mesh *ifmsh;
1692
1693         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1694         ifmsh = &sdata->u.mesh;
1695
1696         /* Set the config options which we are interested in setting */
1697         conf = &(sdata->u.mesh.mshcfg);
1698         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1699                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1700         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1701                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1702         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1703                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1704         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1705                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1706         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1707                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1708         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1709                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1710         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1711                 conf->element_ttl = nconf->element_ttl;
1712         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1713                 if (ifmsh->user_mpm)
1714                         return -EBUSY;
1715                 conf->auto_open_plinks = nconf->auto_open_plinks;
1716         }
1717         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1718                 conf->dot11MeshNbrOffsetMaxNeighbor =
1719                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1720         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1721                 conf->dot11MeshHWMPmaxPREQretries =
1722                         nconf->dot11MeshHWMPmaxPREQretries;
1723         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1724                 conf->path_refresh_time = nconf->path_refresh_time;
1725         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1726                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1727         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1728                 conf->dot11MeshHWMPactivePathTimeout =
1729                         nconf->dot11MeshHWMPactivePathTimeout;
1730         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1731                 conf->dot11MeshHWMPpreqMinInterval =
1732                         nconf->dot11MeshHWMPpreqMinInterval;
1733         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1734                 conf->dot11MeshHWMPperrMinInterval =
1735                         nconf->dot11MeshHWMPperrMinInterval;
1736         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1737                            mask))
1738                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1739                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1740         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1741                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1742                 ieee80211_mesh_root_setup(ifmsh);
1743         }
1744         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1745                 /* our current gate announcement implementation rides on root
1746                  * announcements, so require this ifmsh to also be a root node
1747                  * */
1748                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1749                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1750                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1751                         ieee80211_mesh_root_setup(ifmsh);
1752                 }
1753                 conf->dot11MeshGateAnnouncementProtocol =
1754                         nconf->dot11MeshGateAnnouncementProtocol;
1755         }
1756         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1757                 conf->dot11MeshHWMPRannInterval =
1758                         nconf->dot11MeshHWMPRannInterval;
1759         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1760                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1761         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1762                 /* our RSSI threshold implementation is supported only for
1763                  * devices that report signal in dBm.
1764                  */
1765                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1766                         return -ENOTSUPP;
1767                 conf->rssi_threshold = nconf->rssi_threshold;
1768         }
1769         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1770                 conf->ht_opmode = nconf->ht_opmode;
1771                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1772                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1773         }
1774         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1775                 conf->dot11MeshHWMPactivePathToRootTimeout =
1776                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1777         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1778                 conf->dot11MeshHWMProotInterval =
1779                         nconf->dot11MeshHWMProotInterval;
1780         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1781                 conf->dot11MeshHWMPconfirmationInterval =
1782                         nconf->dot11MeshHWMPconfirmationInterval;
1783         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1784                 conf->power_mode = nconf->power_mode;
1785                 ieee80211_mps_local_status_update(sdata);
1786         }
1787         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1788                 conf->dot11MeshAwakeWindowDuration =
1789                         nconf->dot11MeshAwakeWindowDuration;
1790         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1791                 conf->plink_timeout = nconf->plink_timeout;
1792         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1793         return 0;
1794 }
1795
1796 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1797                                const struct mesh_config *conf,
1798                                const struct mesh_setup *setup)
1799 {
1800         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1802         int err;
1803
1804         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1805         err = copy_mesh_setup(ifmsh, setup);
1806         if (err)
1807                 return err;
1808
1809         /* can mesh use other SMPS modes? */
1810         sdata->smps_mode = IEEE80211_SMPS_OFF;
1811         sdata->needed_rx_chains = sdata->local->rx_chains;
1812
1813         mutex_lock(&sdata->local->mtx);
1814         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1815                                         IEEE80211_CHANCTX_SHARED);
1816         mutex_unlock(&sdata->local->mtx);
1817         if (err)
1818                 return err;
1819
1820         return ieee80211_start_mesh(sdata);
1821 }
1822
1823 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1824 {
1825         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1826
1827         ieee80211_stop_mesh(sdata);
1828         mutex_lock(&sdata->local->mtx);
1829         ieee80211_vif_release_channel(sdata);
1830         mutex_unlock(&sdata->local->mtx);
1831
1832         return 0;
1833 }
1834 #endif
1835
1836 static int ieee80211_change_bss(struct wiphy *wiphy,
1837                                 struct net_device *dev,
1838                                 struct bss_parameters *params)
1839 {
1840         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1841         enum ieee80211_band band;
1842         u32 changed = 0;
1843
1844         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1845                 return -ENOENT;
1846
1847         band = ieee80211_get_sdata_band(sdata);
1848
1849         if (params->use_cts_prot >= 0) {
1850                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1851                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1852         }
1853         if (params->use_short_preamble >= 0) {
1854                 sdata->vif.bss_conf.use_short_preamble =
1855                         params->use_short_preamble;
1856                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1857         }
1858
1859         if (!sdata->vif.bss_conf.use_short_slot &&
1860             band == IEEE80211_BAND_5GHZ) {
1861                 sdata->vif.bss_conf.use_short_slot = true;
1862                 changed |= BSS_CHANGED_ERP_SLOT;
1863         }
1864
1865         if (params->use_short_slot_time >= 0) {
1866                 sdata->vif.bss_conf.use_short_slot =
1867                         params->use_short_slot_time;
1868                 changed |= BSS_CHANGED_ERP_SLOT;
1869         }
1870
1871         if (params->basic_rates) {
1872                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1873                                          wiphy->bands[band],
1874                                          params->basic_rates,
1875                                          params->basic_rates_len,
1876                                          &sdata->vif.bss_conf.basic_rates);
1877                 changed |= BSS_CHANGED_BASIC_RATES;
1878         }
1879
1880         if (params->ap_isolate >= 0) {
1881                 if (params->ap_isolate)
1882                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1883                 else
1884                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1885         }
1886
1887         if (params->ht_opmode >= 0) {
1888                 sdata->vif.bss_conf.ht_operation_mode =
1889                         (u16) params->ht_opmode;
1890                 changed |= BSS_CHANGED_HT;
1891         }
1892
1893         if (params->p2p_ctwindow >= 0) {
1894                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1895                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1896                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1897                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1898                 changed |= BSS_CHANGED_P2P_PS;
1899         }
1900
1901         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         } else if (params->p2p_opp_ps == 0) {
1906                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1907                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1908                 changed |= BSS_CHANGED_P2P_PS;
1909         }
1910
1911         ieee80211_bss_info_change_notify(sdata, changed);
1912
1913         return 0;
1914 }
1915
1916 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1917                                     struct net_device *dev,
1918                                     struct ieee80211_txq_params *params)
1919 {
1920         struct ieee80211_local *local = wiphy_priv(wiphy);
1921         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1922         struct ieee80211_tx_queue_params p;
1923
1924         if (!local->ops->conf_tx)
1925                 return -EOPNOTSUPP;
1926
1927         if (local->hw.queues < IEEE80211_NUM_ACS)
1928                 return -EOPNOTSUPP;
1929
1930         memset(&p, 0, sizeof(p));
1931         p.aifs = params->aifs;
1932         p.cw_max = params->cwmax;
1933         p.cw_min = params->cwmin;
1934         p.txop = params->txop;
1935
1936         /*
1937          * Setting tx queue params disables u-apsd because it's only
1938          * called in master mode.
1939          */
1940         p.uapsd = false;
1941
1942         sdata->tx_conf[params->ac] = p;
1943         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1944                 wiphy_debug(local->hw.wiphy,
1945                             "failed to set TX queue parameters for AC %d\n",
1946                             params->ac);
1947                 return -EINVAL;
1948         }
1949
1950         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1951
1952         return 0;
1953 }
1954
1955 #ifdef CONFIG_PM
1956 static int ieee80211_suspend(struct wiphy *wiphy,
1957                              struct cfg80211_wowlan *wowlan)
1958 {
1959         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1960 }
1961
1962 static int ieee80211_resume(struct wiphy *wiphy)
1963 {
1964         return __ieee80211_resume(wiphy_priv(wiphy));
1965 }
1966 #else
1967 #define ieee80211_suspend NULL
1968 #define ieee80211_resume NULL
1969 #endif
1970
1971 static int ieee80211_scan(struct wiphy *wiphy,
1972                           struct cfg80211_scan_request *req)
1973 {
1974         struct ieee80211_sub_if_data *sdata;
1975
1976         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1977
1978         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1979         case NL80211_IFTYPE_STATION:
1980         case NL80211_IFTYPE_ADHOC:
1981         case NL80211_IFTYPE_MESH_POINT:
1982         case NL80211_IFTYPE_P2P_CLIENT:
1983         case NL80211_IFTYPE_P2P_DEVICE:
1984                 break;
1985         case NL80211_IFTYPE_P2P_GO:
1986                 if (sdata->local->ops->hw_scan)
1987                         break;
1988                 /*
1989                  * FIXME: implement NoA while scanning in software,
1990                  * for now fall through to allow scanning only when
1991                  * beaconing hasn't been configured yet
1992                  */
1993         case NL80211_IFTYPE_AP:
1994                 /*
1995                  * If the scan has been forced (and the driver supports
1996                  * forcing), don't care about being beaconing already.
1997                  * This will create problems to the attached stations (e.g. all
1998                  * the  frames sent while scanning on other channel will be
1999                  * lost)
2000                  */
2001                 if (sdata->u.ap.beacon &&
2002                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
2003                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2004                         return -EOPNOTSUPP;
2005                 break;
2006         default:
2007                 return -EOPNOTSUPP;
2008         }
2009
2010         return ieee80211_request_scan(sdata, req);
2011 }
2012
2013 static int
2014 ieee80211_sched_scan_start(struct wiphy *wiphy,
2015                            struct net_device *dev,
2016                            struct cfg80211_sched_scan_request *req)
2017 {
2018         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2019
2020         if (!sdata->local->ops->sched_scan_start)
2021                 return -EOPNOTSUPP;
2022
2023         return ieee80211_request_sched_scan_start(sdata, req);
2024 }
2025
2026 static int
2027 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2028 {
2029         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2030
2031         if (!sdata->local->ops->sched_scan_stop)
2032                 return -EOPNOTSUPP;
2033
2034         return ieee80211_request_sched_scan_stop(sdata);
2035 }
2036
2037 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2038                           struct cfg80211_auth_request *req)
2039 {
2040         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2041 }
2042
2043 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2044                            struct cfg80211_assoc_request *req)
2045 {
2046         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2047 }
2048
2049 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2050                             struct cfg80211_deauth_request *req)
2051 {
2052         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2053 }
2054
2055 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2056                               struct cfg80211_disassoc_request *req)
2057 {
2058         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2059 }
2060
2061 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2062                                struct cfg80211_ibss_params *params)
2063 {
2064         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2065 }
2066
2067 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2068 {
2069         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2070 }
2071
2072 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2073                               struct ocb_setup *setup)
2074 {
2075         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2076 }
2077
2078 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2079 {
2080         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2081 }
2082
2083 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2084                                     int rate[IEEE80211_NUM_BANDS])
2085 {
2086         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2087
2088         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2089                sizeof(int) * IEEE80211_NUM_BANDS);
2090
2091         return 0;
2092 }
2093
2094 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2095 {
2096         struct ieee80211_local *local = wiphy_priv(wiphy);
2097         int err;
2098
2099         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2100                 ieee80211_check_fast_xmit_all(local);
2101
2102                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2103
2104                 if (err) {
2105                         ieee80211_check_fast_xmit_all(local);
2106                         return err;
2107                 }
2108         }
2109
2110         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2111             (changed & WIPHY_PARAM_DYN_ACK)) {
2112                 s16 coverage_class;
2113
2114                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2115                                         wiphy->coverage_class : -1;
2116                 err = drv_set_coverage_class(local, coverage_class);
2117
2118                 if (err)
2119                         return err;
2120         }
2121
2122         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2123                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2124
2125                 if (err)
2126                         return err;
2127         }
2128
2129         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2130                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2131                         return -EINVAL;
2132                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2133         }
2134         if (changed & WIPHY_PARAM_RETRY_LONG) {
2135                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2136                         return -EINVAL;
2137                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2138         }
2139         if (changed &
2140             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2141                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2142
2143         return 0;
2144 }
2145
2146 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2147                                   struct wireless_dev *wdev,
2148                                   enum nl80211_tx_power_setting type, int mbm)
2149 {
2150         struct ieee80211_local *local = wiphy_priv(wiphy);
2151         struct ieee80211_sub_if_data *sdata;
2152         enum nl80211_tx_power_setting txp_type = type;
2153         bool update_txp_type = false;
2154
2155         if (wdev) {
2156                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2157
2158                 switch (type) {
2159                 case NL80211_TX_POWER_AUTOMATIC:
2160                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2161                         txp_type = NL80211_TX_POWER_LIMITED;
2162                         break;
2163                 case NL80211_TX_POWER_LIMITED:
2164                 case NL80211_TX_POWER_FIXED:
2165                         if (mbm < 0 || (mbm % 100))
2166                                 return -EOPNOTSUPP;
2167                         sdata->user_power_level = MBM_TO_DBM(mbm);
2168                         break;
2169                 }
2170
2171                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2172                         update_txp_type = true;
2173                         sdata->vif.bss_conf.txpower_type = txp_type;
2174                 }
2175
2176                 ieee80211_recalc_txpower(sdata, update_txp_type);
2177
2178                 return 0;
2179         }
2180
2181         switch (type) {
2182         case NL80211_TX_POWER_AUTOMATIC:
2183                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2184                 txp_type = NL80211_TX_POWER_LIMITED;
2185                 break;
2186         case NL80211_TX_POWER_LIMITED:
2187         case NL80211_TX_POWER_FIXED:
2188                 if (mbm < 0 || (mbm % 100))
2189                         return -EOPNOTSUPP;
2190                 local->user_power_level = MBM_TO_DBM(mbm);
2191                 break;
2192         }
2193
2194         mutex_lock(&local->iflist_mtx);
2195         list_for_each_entry(sdata, &local->interfaces, list) {
2196                 sdata->user_power_level = local->user_power_level;
2197                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2198                         update_txp_type = true;
2199                 sdata->vif.bss_conf.txpower_type = txp_type;
2200         }
2201         list_for_each_entry(sdata, &local->interfaces, list)
2202                 ieee80211_recalc_txpower(sdata, update_txp_type);
2203         mutex_unlock(&local->iflist_mtx);
2204
2205         return 0;
2206 }
2207
2208 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2209                                   struct wireless_dev *wdev,
2210                                   int *dbm)
2211 {
2212         struct ieee80211_local *local = wiphy_priv(wiphy);
2213         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2214
2215         if (local->ops->get_txpower)
2216                 return drv_get_txpower(local, sdata, dbm);
2217
2218         if (!local->use_chanctx)
2219                 *dbm = local->hw.conf.power_level;
2220         else
2221                 *dbm = sdata->vif.bss_conf.txpower;
2222
2223         return 0;
2224 }
2225
2226 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2227                                   const u8 *addr)
2228 {
2229         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2230
2231         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2232
2233         return 0;
2234 }
2235
2236 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2237 {
2238         struct ieee80211_local *local = wiphy_priv(wiphy);
2239
2240         drv_rfkill_poll(local);
2241 }
2242
2243 #ifdef CONFIG_NL80211_TESTMODE
2244 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2245                                   struct wireless_dev *wdev,
2246                                   void *data, int len)
2247 {
2248         struct ieee80211_local *local = wiphy_priv(wiphy);
2249         struct ieee80211_vif *vif = NULL;
2250
2251         if (!local->ops->testmode_cmd)
2252                 return -EOPNOTSUPP;
2253
2254         if (wdev) {
2255                 struct ieee80211_sub_if_data *sdata;
2256
2257                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2258                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2259                         vif = &sdata->vif;
2260         }
2261
2262         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2263 }
2264
2265 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2266                                    struct sk_buff *skb,
2267                                    struct netlink_callback *cb,
2268                                    void *data, int len)
2269 {
2270         struct ieee80211_local *local = wiphy_priv(wiphy);
2271
2272         if (!local->ops->testmode_dump)
2273                 return -EOPNOTSUPP;
2274
2275         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2276 }
2277 #endif
2278
2279 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2280                                 enum ieee80211_smps_mode smps_mode)
2281 {
2282         struct sta_info *sta;
2283         enum ieee80211_smps_mode old_req;
2284
2285         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2286                 return -EINVAL;
2287
2288         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2289                 return 0;
2290
2291         old_req = sdata->u.ap.req_smps;
2292         sdata->u.ap.req_smps = smps_mode;
2293
2294         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2295         if (old_req == smps_mode ||
2296             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2297                 return 0;
2298
2299          /* If no associated stations, there's no need to do anything */
2300         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2301                 sdata->smps_mode = smps_mode;
2302                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2303                 return 0;
2304         }
2305
2306         ht_dbg(sdata,
2307                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2308                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2309
2310         mutex_lock(&sdata->local->sta_mtx);
2311         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2312                 /*
2313                  * Only stations associated to our AP and
2314                  * associated VLANs
2315                  */
2316                 if (sta->sdata->bss != &sdata->u.ap)
2317                         continue;
2318
2319                 /* This station doesn't support MIMO - skip it */
2320                 if (sta_info_tx_streams(sta) == 1)
2321                         continue;
2322
2323                 /*
2324                  * Don't wake up a STA just to send the action frame
2325                  * unless we are getting more restrictive.
2326                  */
2327                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2328                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2329                                                    smps_mode)) {
2330                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2331                                sta->sta.addr);
2332                         continue;
2333                 }
2334
2335                 /*
2336                  * If the STA is not authorized, wait until it gets
2337                  * authorized and the action frame will be sent then.
2338                  */
2339                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2340                         continue;
2341
2342                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2343                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2344                                            sdata->vif.bss_conf.bssid);
2345         }
2346         mutex_unlock(&sdata->local->sta_mtx);
2347
2348         sdata->smps_mode = smps_mode;
2349         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2350
2351         return 0;
2352 }
2353
2354 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2355                                  enum ieee80211_smps_mode smps_mode)
2356 {
2357         const u8 *ap;
2358         enum ieee80211_smps_mode old_req;
2359         int err;
2360
2361         lockdep_assert_held(&sdata->wdev.mtx);
2362
2363         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2364                 return -EINVAL;
2365
2366         old_req = sdata->u.mgd.req_smps;
2367         sdata->u.mgd.req_smps = smps_mode;
2368
2369         if (old_req == smps_mode &&
2370             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2371                 return 0;
2372
2373         /*
2374          * If not associated, or current association is not an HT
2375          * association, there's no need to do anything, just store
2376          * the new value until we associate.
2377          */
2378         if (!sdata->u.mgd.associated ||
2379             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2380                 return 0;
2381
2382         ap = sdata->u.mgd.associated->bssid;
2383
2384         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2385                 if (sdata->u.mgd.powersave)
2386                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2387                 else
2388                         smps_mode = IEEE80211_SMPS_OFF;
2389         }
2390
2391         /* send SM PS frame to AP */
2392         err = ieee80211_send_smps_action(sdata, smps_mode,
2393                                          ap, ap);
2394         if (err)
2395                 sdata->u.mgd.req_smps = old_req;
2396
2397         return err;
2398 }
2399
2400 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2401                                     bool enabled, int timeout)
2402 {
2403         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2404         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2405
2406         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2407                 return -EOPNOTSUPP;
2408
2409         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2410                 return -EOPNOTSUPP;
2411
2412         if (enabled == sdata->u.mgd.powersave &&
2413             timeout == local->dynamic_ps_forced_timeout)
2414                 return 0;
2415
2416         sdata->u.mgd.powersave = enabled;
2417         local->dynamic_ps_forced_timeout = timeout;
2418
2419         /* no change, but if automatic follow powersave */
2420         sdata_lock(sdata);
2421         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2422         sdata_unlock(sdata);
2423
2424         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2425                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2426
2427         ieee80211_recalc_ps(local, -1);
2428         ieee80211_recalc_ps_vif(sdata);
2429
2430         return 0;
2431 }
2432
2433 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2434                                          struct net_device *dev,
2435                                          s32 rssi_thold, u32 rssi_hyst)
2436 {
2437         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2438         struct ieee80211_vif *vif = &sdata->vif;
2439         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2440
2441         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2442             rssi_hyst == bss_conf->cqm_rssi_hyst)
2443                 return 0;
2444
2445         bss_conf->cqm_rssi_thold = rssi_thold;
2446         bss_conf->cqm_rssi_hyst = rssi_hyst;
2447
2448         /* tell the driver upon association, unless already associated */
2449         if (sdata->u.mgd.associated &&
2450             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2451                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2452
2453         return 0;
2454 }
2455
2456 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2457                                       struct net_device *dev,
2458                                       const u8 *addr,
2459                                       const struct cfg80211_bitrate_mask *mask)
2460 {
2461         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2462         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2463         int i, ret;
2464
2465         if (!ieee80211_sdata_running(sdata))
2466                 return -ENETDOWN;
2467
2468         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2469                 ret = drv_set_bitrate_mask(local, sdata, mask);
2470                 if (ret)
2471                         return ret;
2472         }
2473
2474         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2475                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2476                 int j;
2477
2478                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2479                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2480                        sizeof(mask->control[i].ht_mcs));
2481
2482                 sdata->rc_has_mcs_mask[i] = false;
2483                 if (!sband)
2484                         continue;
2485
2486                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++)
2487                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2488                                 sdata->rc_has_mcs_mask[i] = true;
2489                                 break;
2490                         }
2491         }
2492
2493         return 0;
2494 }
2495
2496 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2497                                            struct ieee80211_roc_work *new_roc,
2498                                            struct ieee80211_roc_work *cur_roc)
2499 {
2500         unsigned long now = jiffies;
2501         unsigned long remaining = cur_roc->hw_start_time +
2502                                   msecs_to_jiffies(cur_roc->duration) -
2503                                   now;
2504
2505         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2506                 return false;
2507
2508         /* if it doesn't fit entirely, schedule a new one */
2509         if (new_roc->duration > jiffies_to_msecs(remaining))
2510                 return false;
2511
2512         ieee80211_handle_roc_started(new_roc);
2513
2514         /* add to dependents so we send the expired event properly */
2515         list_add_tail(&new_roc->list, &cur_roc->dependents);
2516         return true;
2517 }
2518
2519 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2520 {
2521         lockdep_assert_held(&local->mtx);
2522
2523         local->roc_cookie_counter++;
2524
2525         /* wow, you wrapped 64 bits ... more likely a bug */
2526         if (WARN_ON(local->roc_cookie_counter == 0))
2527                 local->roc_cookie_counter++;
2528
2529         return local->roc_cookie_counter;
2530 }
2531
2532 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2533                                     struct ieee80211_sub_if_data *sdata,
2534                                     struct ieee80211_channel *channel,
2535                                     unsigned int duration, u64 *cookie,
2536                                     struct sk_buff *txskb,
2537                                     enum ieee80211_roc_type type)
2538 {
2539         struct ieee80211_roc_work *roc, *tmp;
2540         bool queued = false;
2541         int ret;
2542
2543         lockdep_assert_held(&local->mtx);
2544
2545         if (local->use_chanctx && !local->ops->remain_on_channel)
2546                 return -EOPNOTSUPP;
2547
2548         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2549         if (!roc)
2550                 return -ENOMEM;
2551
2552         /*
2553          * If the duration is zero, then the driver
2554          * wouldn't actually do anything. Set it to
2555          * 10 for now.
2556          *
2557          * TODO: cancel the off-channel operation
2558          *       when we get the SKB's TX status and
2559          *       the wait time was zero before.
2560          */
2561         if (!duration)
2562                 duration = 10;
2563
2564         roc->chan = channel;
2565         roc->duration = duration;
2566         roc->req_duration = duration;
2567         roc->frame = txskb;
2568         roc->type = type;
2569         roc->sdata = sdata;
2570         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2571         INIT_LIST_HEAD(&roc->dependents);
2572
2573         /*
2574          * cookie is either the roc cookie (for normal roc)
2575          * or the SKB (for mgmt TX)
2576          */
2577         if (!txskb) {
2578                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2579                 *cookie = roc->cookie;
2580         } else {
2581                 roc->mgmt_tx_cookie = *cookie;
2582         }
2583
2584         /* if there's one pending or we're scanning, queue this one */
2585         if (!list_empty(&local->roc_list) ||
2586             local->scanning || ieee80211_is_radar_required(local))
2587                 goto out_check_combine;
2588
2589         /* if not HW assist, just queue & schedule work */
2590         if (!local->ops->remain_on_channel) {
2591                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2592                 goto out_queue;
2593         }
2594
2595         /* otherwise actually kick it off here (for error handling) */
2596
2597         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2598         if (ret) {
2599                 kfree(roc);
2600                 return ret;
2601         }
2602
2603         roc->started = true;
2604         goto out_queue;
2605
2606  out_check_combine:
2607         list_for_each_entry(tmp, &local->roc_list, list) {
2608                 if (tmp->chan != channel || tmp->sdata != sdata)
2609                         continue;
2610
2611                 /*
2612                  * Extend this ROC if possible:
2613                  *
2614                  * If it hasn't started yet, just increase the duration
2615                  * and add the new one to the list of dependents.
2616                  * If the type of the new ROC has higher priority, modify the
2617                  * type of the previous one to match that of the new one.
2618                  */
2619                 if (!tmp->started) {
2620                         list_add_tail(&roc->list, &tmp->dependents);
2621                         tmp->duration = max(tmp->duration, roc->duration);
2622                         tmp->type = max(tmp->type, roc->type);
2623                         queued = true;
2624                         break;
2625                 }
2626
2627                 /* If it has already started, it's more difficult ... */
2628                 if (local->ops->remain_on_channel) {
2629                         /*
2630                          * In the offloaded ROC case, if it hasn't begun, add
2631                          * this new one to the dependent list to be handled
2632                          * when the master one begins. If it has begun,
2633                          * check if it fits entirely within the existing one,
2634                          * in which case it will just be dependent as well.
2635                          * Otherwise, schedule it by itself.
2636                          */
2637                         if (!tmp->hw_begun) {
2638                                 list_add_tail(&roc->list, &tmp->dependents);
2639                                 queued = true;
2640                                 break;
2641                         }
2642
2643                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2644                                 queued = true;
2645                 } else if (del_timer_sync(&tmp->work.timer)) {
2646                         unsigned long new_end;
2647
2648                         /*
2649                          * In the software ROC case, cancel the timer, if
2650                          * that fails then the finish work is already
2651                          * queued/pending and thus we queue the new ROC
2652                          * normally, if that succeeds then we can extend
2653                          * the timer duration and TX the frame (if any.)
2654                          */
2655
2656                         list_add_tail(&roc->list, &tmp->dependents);
2657                         queued = true;
2658
2659                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2660
2661                         /* ok, it was started & we canceled timer */
2662                         if (time_after(new_end, tmp->work.timer.expires))
2663                                 mod_timer(&tmp->work.timer, new_end);
2664                         else
2665                                 add_timer(&tmp->work.timer);
2666
2667                         ieee80211_handle_roc_started(roc);
2668                 }
2669                 break;
2670         }
2671
2672  out_queue:
2673         if (!queued)
2674                 list_add_tail(&roc->list, &local->roc_list);
2675
2676         return 0;
2677 }
2678
2679 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2680                                        struct wireless_dev *wdev,
2681                                        struct ieee80211_channel *chan,
2682                                        unsigned int duration,
2683                                        u64 *cookie)
2684 {
2685         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2686         struct ieee80211_local *local = sdata->local;
2687         int ret;
2688
2689         mutex_lock(&local->mtx);
2690         ret = ieee80211_start_roc_work(local, sdata, chan,
2691                                        duration, cookie, NULL,
2692                                        IEEE80211_ROC_TYPE_NORMAL);
2693         mutex_unlock(&local->mtx);
2694
2695         return ret;
2696 }
2697
2698 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2699                                 u64 cookie, bool mgmt_tx)
2700 {
2701         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2702         int ret;
2703
2704         mutex_lock(&local->mtx);
2705         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2706                 struct ieee80211_roc_work *dep, *tmp2;
2707
2708                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2709                         if (!mgmt_tx && dep->cookie != cookie)
2710                                 continue;
2711                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2712                                 continue;
2713                         /* found dependent item -- just remove it */
2714                         list_del(&dep->list);
2715                         mutex_unlock(&local->mtx);
2716
2717                         ieee80211_roc_notify_destroy(dep, true);
2718                         return 0;
2719                 }
2720
2721                 if (!mgmt_tx && roc->cookie != cookie)
2722                         continue;
2723                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2724                         continue;
2725
2726                 found = roc;
2727                 break;
2728         }
2729
2730         if (!found) {
2731                 mutex_unlock(&local->mtx);
2732                 return -ENOENT;
2733         }
2734
2735         /*
2736          * We found the item to cancel, so do that. Note that it
2737          * may have dependents, which we also cancel (and send
2738          * the expired signal for.) Not doing so would be quite
2739          * tricky here, but we may need to fix it later.
2740          */
2741
2742         if (local->ops->remain_on_channel) {
2743                 if (found->started) {
2744                         ret = drv_cancel_remain_on_channel(local);
2745                         if (WARN_ON_ONCE(ret)) {
2746                                 mutex_unlock(&local->mtx);
2747                                 return ret;
2748                         }
2749                 }
2750
2751                 list_del(&found->list);
2752
2753                 if (found->started)
2754                         ieee80211_start_next_roc(local);
2755                 mutex_unlock(&local->mtx);
2756
2757                 ieee80211_roc_notify_destroy(found, true);
2758         } else {
2759                 /* work may be pending so use it all the time */
2760                 found->abort = true;
2761                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2762
2763                 mutex_unlock(&local->mtx);
2764
2765                 /* work will clean up etc */
2766                 flush_delayed_work(&found->work);
2767                 WARN_ON(!found->to_be_freed);
2768                 kfree(found);
2769         }
2770
2771         return 0;
2772 }
2773
2774 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2775                                               struct wireless_dev *wdev,
2776                                               u64 cookie)
2777 {
2778         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2779         struct ieee80211_local *local = sdata->local;
2780
2781         return ieee80211_cancel_roc(local, cookie, false);
2782 }
2783
2784 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2785                                            struct net_device *dev,
2786                                            struct cfg80211_chan_def *chandef,
2787                                            u32 cac_time_ms)
2788 {
2789         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2790         struct ieee80211_local *local = sdata->local;
2791         int err;
2792
2793         mutex_lock(&local->mtx);
2794         if (!list_empty(&local->roc_list) || local->scanning) {
2795                 err = -EBUSY;
2796                 goto out_unlock;
2797         }
2798
2799         /* whatever, but channel contexts should not complain about that one */
2800         sdata->smps_mode = IEEE80211_SMPS_OFF;
2801         sdata->needed_rx_chains = local->rx_chains;
2802
2803         err = ieee80211_vif_use_channel(sdata, chandef,
2804                                         IEEE80211_CHANCTX_SHARED);
2805         if (err)
2806                 goto out_unlock;
2807
2808         ieee80211_queue_delayed_work(&sdata->local->hw,
2809                                      &sdata->dfs_cac_timer_work,
2810                                      msecs_to_jiffies(cac_time_ms));
2811
2812  out_unlock:
2813         mutex_unlock(&local->mtx);
2814         return err;
2815 }
2816
2817 static struct cfg80211_beacon_data *
2818 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2819 {
2820         struct cfg80211_beacon_data *new_beacon;
2821         u8 *pos;
2822         int len;
2823
2824         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2825               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2826               beacon->probe_resp_len;
2827
2828         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2829         if (!new_beacon)
2830                 return NULL;
2831
2832         pos = (u8 *)(new_beacon + 1);
2833         if (beacon->head_len) {
2834                 new_beacon->head_len = beacon->head_len;
2835                 new_beacon->head = pos;
2836                 memcpy(pos, beacon->head, beacon->head_len);
2837                 pos += beacon->head_len;
2838         }
2839         if (beacon->tail_len) {
2840                 new_beacon->tail_len = beacon->tail_len;
2841                 new_beacon->tail = pos;
2842                 memcpy(pos, beacon->tail, beacon->tail_len);
2843                 pos += beacon->tail_len;
2844         }
2845         if (beacon->beacon_ies_len) {
2846                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2847                 new_beacon->beacon_ies = pos;
2848                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2849                 pos += beacon->beacon_ies_len;
2850         }
2851         if (beacon->proberesp_ies_len) {
2852                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2853                 new_beacon->proberesp_ies = pos;
2854                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2855                 pos += beacon->proberesp_ies_len;
2856         }
2857         if (beacon->assocresp_ies_len) {
2858                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2859                 new_beacon->assocresp_ies = pos;
2860                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2861                 pos += beacon->assocresp_ies_len;
2862         }
2863         if (beacon->probe_resp_len) {
2864                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2865                 beacon->probe_resp = pos;
2866                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2867                 pos += beacon->probe_resp_len;
2868         }
2869
2870         return new_beacon;
2871 }
2872
2873 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2874 {
2875         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2876
2877         ieee80211_queue_work(&sdata->local->hw,
2878                              &sdata->csa_finalize_work);
2879 }
2880 EXPORT_SYMBOL(ieee80211_csa_finish);
2881
2882 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2883                                           u32 *changed)
2884 {
2885         int err;
2886
2887         switch (sdata->vif.type) {
2888         case NL80211_IFTYPE_AP:
2889                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2890                                               NULL);
2891                 kfree(sdata->u.ap.next_beacon);
2892                 sdata->u.ap.next_beacon = NULL;
2893
2894                 if (err < 0)
2895                         return err;
2896                 *changed |= err;
2897                 break;
2898         case NL80211_IFTYPE_ADHOC:
2899                 err = ieee80211_ibss_finish_csa(sdata);
2900                 if (err < 0)
2901                         return err;
2902                 *changed |= err;
2903                 break;
2904 #ifdef CONFIG_MAC80211_MESH
2905         case NL80211_IFTYPE_MESH_POINT:
2906                 err = ieee80211_mesh_finish_csa(sdata);
2907                 if (err < 0)
2908                         return err;
2909                 *changed |= err;
2910                 break;
2911 #endif
2912         default:
2913                 WARN_ON(1);
2914                 return -EINVAL;
2915         }
2916
2917         return 0;
2918 }
2919
2920 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2921 {
2922         struct ieee80211_local *local = sdata->local;
2923         u32 changed = 0;
2924         int err;
2925
2926         sdata_assert_lock(sdata);
2927         lockdep_assert_held(&local->mtx);
2928         lockdep_assert_held(&local->chanctx_mtx);
2929
2930         /*
2931          * using reservation isn't immediate as it may be deferred until later
2932          * with multi-vif. once reservation is complete it will re-schedule the
2933          * work with no reserved_chanctx so verify chandef to check if it
2934          * completed successfully
2935          */
2936
2937         if (sdata->reserved_chanctx) {
2938                 /*
2939                  * with multi-vif csa driver may call ieee80211_csa_finish()
2940                  * many times while waiting for other interfaces to use their
2941                  * reservations
2942                  */
2943                 if (sdata->reserved_ready)
2944                         return 0;
2945
2946                 return ieee80211_vif_use_reserved_context(sdata);
2947         }
2948
2949         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2950                                         &sdata->csa_chandef))
2951                 return -EINVAL;
2952
2953         sdata->vif.csa_active = false;
2954
2955         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2956         if (err)
2957                 return err;
2958
2959         ieee80211_bss_info_change_notify(sdata, changed);
2960
2961         if (sdata->csa_block_tx) {
2962                 ieee80211_wake_vif_queues(local, sdata,
2963                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2964                 sdata->csa_block_tx = false;
2965         }
2966
2967         err = drv_post_channel_switch(sdata);
2968         if (err)
2969                 return err;
2970
2971         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2972
2973         return 0;
2974 }
2975
2976 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2977 {
2978         if (__ieee80211_csa_finalize(sdata)) {
2979                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2980                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2981                                     GFP_KERNEL);
2982         }
2983 }
2984
2985 void ieee80211_csa_finalize_work(struct work_struct *work)
2986 {
2987         struct ieee80211_sub_if_data *sdata =
2988                 container_of(work, struct ieee80211_sub_if_data,
2989                              csa_finalize_work);
2990         struct ieee80211_local *local = sdata->local;
2991
2992         sdata_lock(sdata);
2993         mutex_lock(&local->mtx);
2994         mutex_lock(&local->chanctx_mtx);
2995
2996         /* AP might have been stopped while waiting for the lock. */
2997         if (!sdata->vif.csa_active)
2998                 goto unlock;
2999
3000         if (!ieee80211_sdata_running(sdata))
3001                 goto unlock;
3002
3003         ieee80211_csa_finalize(sdata);
3004
3005 unlock:
3006         mutex_unlock(&local->chanctx_mtx);
3007         mutex_unlock(&local->mtx);
3008         sdata_unlock(sdata);
3009 }
3010
3011 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3012                                     struct cfg80211_csa_settings *params,
3013                                     u32 *changed)
3014 {
3015         struct ieee80211_csa_settings csa = {};
3016         int err;
3017
3018         switch (sdata->vif.type) {
3019         case NL80211_IFTYPE_AP:
3020                 sdata->u.ap.next_beacon =
3021                         cfg80211_beacon_dup(&params->beacon_after);
3022                 if (!sdata->u.ap.next_beacon)
3023                         return -ENOMEM;
3024
3025                 /*
3026                  * With a count of 0, we don't have to wait for any
3027                  * TBTT before switching, so complete the CSA
3028                  * immediately.  In theory, with a count == 1 we
3029                  * should delay the switch until just before the next
3030                  * TBTT, but that would complicate things so we switch
3031                  * immediately too.  If we would delay the switch
3032                  * until the next TBTT, we would have to set the probe
3033                  * response here.
3034                  *
3035                  * TODO: A channel switch with count <= 1 without
3036                  * sending a CSA action frame is kind of useless,
3037                  * because the clients won't know we're changing
3038                  * channels.  The action frame must be implemented
3039                  * either here or in the userspace.
3040                  */
3041                 if (params->count <= 1)
3042                         break;
3043
3044                 if ((params->n_counter_offsets_beacon >
3045                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3046                     (params->n_counter_offsets_presp >
3047                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3048                         return -EINVAL;
3049
3050                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3051                 csa.counter_offsets_presp = params->counter_offsets_presp;
3052                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3053                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3054                 csa.count = params->count;
3055
3056                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3057                 if (err < 0) {
3058                         kfree(sdata->u.ap.next_beacon);
3059                         return err;
3060                 }
3061                 *changed |= err;
3062
3063                 break;
3064         case NL80211_IFTYPE_ADHOC:
3065                 if (!sdata->vif.bss_conf.ibss_joined)
3066                         return -EINVAL;
3067
3068                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3069                         return -EINVAL;
3070
3071                 switch (params->chandef.width) {
3072                 case NL80211_CHAN_WIDTH_40:
3073                         if (cfg80211_get_chandef_type(&params->chandef) !=
3074                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3075                                 return -EINVAL;
3076                 case NL80211_CHAN_WIDTH_5:
3077                 case NL80211_CHAN_WIDTH_10:
3078                 case NL80211_CHAN_WIDTH_20_NOHT:
3079                 case NL80211_CHAN_WIDTH_20:
3080                         break;
3081                 default:
3082                         return -EINVAL;
3083                 }
3084
3085                 /* changes into another band are not supported */
3086                 if (sdata->u.ibss.chandef.chan->band !=
3087                     params->chandef.chan->band)
3088                         return -EINVAL;
3089
3090                 /* see comments in the NL80211_IFTYPE_AP block */
3091                 if (params->count > 1) {
3092                         err = ieee80211_ibss_csa_beacon(sdata, params);
3093                         if (err < 0)
3094                                 return err;
3095                         *changed |= err;
3096                 }
3097
3098                 ieee80211_send_action_csa(sdata, params);
3099
3100                 break;
3101 #ifdef CONFIG_MAC80211_MESH
3102         case NL80211_IFTYPE_MESH_POINT: {
3103                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3104
3105                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3106                         return -EINVAL;
3107
3108                 /* changes into another band are not supported */
3109                 if (sdata->vif.bss_conf.chandef.chan->band !=
3110                     params->chandef.chan->band)
3111                         return -EINVAL;
3112
3113                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3114                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3115                         if (!ifmsh->pre_value)
3116                                 ifmsh->pre_value = 1;
3117                         else
3118                                 ifmsh->pre_value++;
3119                 }
3120
3121                 /* see comments in the NL80211_IFTYPE_AP block */
3122                 if (params->count > 1) {
3123                         err = ieee80211_mesh_csa_beacon(sdata, params);
3124                         if (err < 0) {
3125                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3126                                 return err;
3127                         }
3128                         *changed |= err;
3129                 }
3130
3131                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3132                         ieee80211_send_action_csa(sdata, params);
3133
3134                 break;
3135                 }
3136 #endif
3137         default:
3138                 return -EOPNOTSUPP;
3139         }
3140
3141         return 0;
3142 }
3143
3144 static int
3145 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3146                            struct cfg80211_csa_settings *params)
3147 {
3148         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3149         struct ieee80211_local *local = sdata->local;
3150         struct ieee80211_channel_switch ch_switch;
3151         struct ieee80211_chanctx_conf *conf;
3152         struct ieee80211_chanctx *chanctx;
3153         u32 changed = 0;
3154         int err;
3155
3156         sdata_assert_lock(sdata);
3157         lockdep_assert_held(&local->mtx);
3158
3159         if (!list_empty(&local->roc_list) || local->scanning)
3160                 return -EBUSY;
3161
3162         if (sdata->wdev.cac_started)
3163                 return -EBUSY;
3164
3165         if (cfg80211_chandef_identical(&params->chandef,
3166                                        &sdata->vif.bss_conf.chandef))
3167                 return -EINVAL;
3168
3169         /* don't allow another channel switch if one is already active. */
3170         if (sdata->vif.csa_active)
3171                 return -EBUSY;
3172
3173         mutex_lock(&local->chanctx_mtx);
3174         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3175                                          lockdep_is_held(&local->chanctx_mtx));
3176         if (!conf) {
3177                 err = -EBUSY;
3178                 goto out;
3179         }
3180
3181         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3182         if (!chanctx) {
3183                 err = -EBUSY;
3184                 goto out;
3185         }
3186
3187         ch_switch.timestamp = 0;
3188         ch_switch.device_timestamp = 0;
3189         ch_switch.block_tx = params->block_tx;
3190         ch_switch.chandef = params->chandef;
3191         ch_switch.count = params->count;
3192
3193         err = drv_pre_channel_switch(sdata, &ch_switch);
3194         if (err)
3195                 goto out;
3196
3197         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3198                                             chanctx->mode,
3199                                             params->radar_required);
3200         if (err)
3201                 goto out;
3202
3203         /* if reservation is invalid then this will fail */
3204         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3205         if (err) {
3206                 ieee80211_vif_unreserve_chanctx(sdata);
3207                 goto out;
3208         }
3209
3210         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3211         if (err) {
3212                 ieee80211_vif_unreserve_chanctx(sdata);
3213                 goto out;
3214         }
3215
3216         sdata->csa_chandef = params->chandef;
3217         sdata->csa_block_tx = params->block_tx;
3218         sdata->vif.csa_active = true;
3219
3220         if (sdata->csa_block_tx)
3221                 ieee80211_stop_vif_queues(local, sdata,
3222                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3223
3224         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3225                                           params->count);
3226
3227         if (changed) {
3228                 ieee80211_bss_info_change_notify(sdata, changed);
3229                 drv_channel_switch_beacon(sdata, &params->chandef);
3230         } else {
3231                 /* if the beacon didn't change, we can finalize immediately */
3232                 ieee80211_csa_finalize(sdata);
3233         }
3234
3235 out:
3236         mutex_unlock(&local->chanctx_mtx);
3237         return err;
3238 }
3239
3240 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3241                              struct cfg80211_csa_settings *params)
3242 {
3243         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3244         struct ieee80211_local *local = sdata->local;
3245         int err;
3246
3247         mutex_lock(&local->mtx);
3248         err = __ieee80211_channel_switch(wiphy, dev, params);
3249         mutex_unlock(&local->mtx);
3250
3251         return err;
3252 }
3253
3254 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3255                                               struct sk_buff *skb, u64 *cookie,
3256                                               gfp_t gfp)
3257 {
3258         unsigned long spin_flags;
3259         struct sk_buff *ack_skb;
3260         int id;
3261
3262         ack_skb = skb_copy(skb, gfp);
3263         if (!ack_skb)
3264                 return ERR_PTR(-ENOMEM);
3265
3266         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3267         id = idr_alloc(&local->ack_status_frames, ack_skb,
3268                        1, 0x10000, GFP_ATOMIC);
3269         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3270
3271         if (id < 0) {
3272                 kfree_skb(ack_skb);
3273                 return ERR_PTR(-ENOMEM);
3274         }
3275
3276         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3277
3278         *cookie = ieee80211_mgmt_tx_cookie(local);
3279         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3280
3281         return ack_skb;
3282 }
3283
3284 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3285                              struct cfg80211_mgmt_tx_params *params,
3286                              u64 *cookie)
3287 {
3288         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3289         struct ieee80211_local *local = sdata->local;
3290         struct sk_buff *skb, *ack_skb;
3291         struct sta_info *sta;
3292         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3293         bool need_offchan = false;
3294         u32 flags;
3295         int ret;
3296         u8 *data;
3297
3298         if (params->dont_wait_for_ack)
3299                 flags = IEEE80211_TX_CTL_NO_ACK;
3300         else
3301                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3302                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3303
3304         if (params->no_cck)
3305                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3306
3307         switch (sdata->vif.type) {
3308         case NL80211_IFTYPE_ADHOC:
3309                 if (!sdata->vif.bss_conf.ibss_joined)
3310                         need_offchan = true;
3311                 /* fall through */
3312 #ifdef CONFIG_MAC80211_MESH
3313         case NL80211_IFTYPE_MESH_POINT:
3314                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3315                     !sdata->u.mesh.mesh_id_len)
3316                         need_offchan = true;
3317                 /* fall through */
3318 #endif
3319         case NL80211_IFTYPE_AP:
3320         case NL80211_IFTYPE_AP_VLAN:
3321         case NL80211_IFTYPE_P2P_GO:
3322                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3323                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3324                     !rcu_access_pointer(sdata->bss->beacon))
3325                         need_offchan = true;
3326                 if (!ieee80211_is_action(mgmt->frame_control) ||
3327                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3328                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3329                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3330                         break;
3331                 rcu_read_lock();
3332                 sta = sta_info_get(sdata, mgmt->da);
3333                 rcu_read_unlock();
3334                 if (!sta)
3335                         return -ENOLINK;
3336                 break;
3337         case NL80211_IFTYPE_STATION:
3338         case NL80211_IFTYPE_P2P_CLIENT:
3339                 sdata_lock(sdata);
3340                 if (!sdata->u.mgd.associated ||
3341                     (params->offchan && params->wait &&
3342                      local->ops->remain_on_channel &&
3343                      memcmp(sdata->u.mgd.associated->bssid,
3344                             mgmt->bssid, ETH_ALEN)))
3345                         need_offchan = true;
3346                 sdata_unlock(sdata);
3347                 break;
3348         case NL80211_IFTYPE_P2P_DEVICE:
3349                 need_offchan = true;
3350                 break;
3351         default:
3352                 return -EOPNOTSUPP;
3353         }
3354
3355         /* configurations requiring offchan cannot work if no channel has been
3356          * specified
3357          */
3358         if (need_offchan && !params->chan)
3359                 return -EINVAL;
3360
3361         mutex_lock(&local->mtx);
3362
3363         /* Check if the operating channel is the requested channel */
3364         if (!need_offchan) {
3365                 struct ieee80211_chanctx_conf *chanctx_conf;
3366
3367                 rcu_read_lock();
3368                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3369
3370                 if (chanctx_conf) {
3371                         need_offchan = params->chan &&
3372                                        (params->chan !=
3373                                         chanctx_conf->def.chan);
3374                 } else if (!params->chan) {
3375                         ret = -EINVAL;
3376                         rcu_read_unlock();
3377                         goto out_unlock;
3378                 } else {
3379                         need_offchan = true;
3380                 }
3381                 rcu_read_unlock();
3382         }
3383
3384         if (need_offchan && !params->offchan) {
3385                 ret = -EBUSY;
3386                 goto out_unlock;
3387         }
3388
3389         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3390         if (!skb) {
3391                 ret = -ENOMEM;
3392                 goto out_unlock;
3393         }
3394         skb_reserve(skb, local->hw.extra_tx_headroom);
3395
3396         data = skb_put(skb, params->len);
3397         memcpy(data, params->buf, params->len);
3398
3399         /* Update CSA counters */
3400         if (sdata->vif.csa_active &&
3401             (sdata->vif.type == NL80211_IFTYPE_AP ||
3402              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3403              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3404             params->n_csa_offsets) {
3405                 int i;
3406                 struct beacon_data *beacon = NULL;
3407
3408                 rcu_read_lock();
3409
3410                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3411                         beacon = rcu_dereference(sdata->u.ap.beacon);
3412                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3413                         beacon = rcu_dereference(sdata->u.ibss.presp);
3414                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3415                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3416
3417                 if (beacon)
3418                         for (i = 0; i < params->n_csa_offsets; i++)
3419                                 data[params->csa_offsets[i]] =
3420                                         beacon->csa_current_counter;
3421
3422                 rcu_read_unlock();
3423         }
3424
3425         IEEE80211_SKB_CB(skb)->flags = flags;
3426
3427         skb->dev = sdata->dev;
3428
3429         if (!params->dont_wait_for_ack) {
3430                 /* make a copy to preserve the frame contents
3431                  * in case of encryption.
3432                  */
3433                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3434                                                  GFP_KERNEL);
3435                 if (IS_ERR(ack_skb)) {
3436                         ret = PTR_ERR(ack_skb);
3437                         kfree_skb(skb);
3438                         goto out_unlock;
3439                 }
3440         } else {
3441                 /* for cookie below */
3442                 ack_skb = skb;
3443         }
3444
3445         if (!need_offchan) {
3446                 ieee80211_tx_skb(sdata, skb);
3447                 ret = 0;
3448                 goto out_unlock;
3449         }
3450
3451         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3452                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3453         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3454                 IEEE80211_SKB_CB(skb)->hw_queue =
3455                         local->hw.offchannel_tx_hw_queue;
3456
3457         /* This will handle all kinds of coalescing and immediate TX */
3458         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3459                                        params->wait, cookie, skb,
3460                                        IEEE80211_ROC_TYPE_MGMT_TX);
3461         if (ret)
3462                 kfree_skb(skb);
3463  out_unlock:
3464         mutex_unlock(&local->mtx);
3465         return ret;
3466 }
3467
3468 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3469                                          struct wireless_dev *wdev,
3470                                          u64 cookie)
3471 {
3472         struct ieee80211_local *local = wiphy_priv(wiphy);
3473
3474         return ieee80211_cancel_roc(local, cookie, true);
3475 }
3476
3477 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3478                                           struct wireless_dev *wdev,
3479                                           u16 frame_type, bool reg)
3480 {
3481         struct ieee80211_local *local = wiphy_priv(wiphy);
3482
3483         switch (frame_type) {
3484         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3485                 if (reg)
3486                         local->probe_req_reg++;
3487                 else
3488                         local->probe_req_reg--;
3489
3490                 if (!local->open_count)
3491                         break;
3492
3493                 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
3494                 break;
3495         default:
3496                 break;
3497         }
3498 }
3499
3500 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3501 {
3502         struct ieee80211_local *local = wiphy_priv(wiphy);
3503
3504         if (local->started)
3505                 return -EOPNOTSUPP;
3506
3507         return drv_set_antenna(local, tx_ant, rx_ant);
3508 }
3509
3510 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3511 {
3512         struct ieee80211_local *local = wiphy_priv(wiphy);
3513
3514         return drv_get_antenna(local, tx_ant, rx_ant);
3515 }
3516
3517 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3518                                     struct net_device *dev,
3519                                     struct cfg80211_gtk_rekey_data *data)
3520 {
3521         struct ieee80211_local *local = wiphy_priv(wiphy);
3522         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3523
3524         if (!local->ops->set_rekey_data)
3525                 return -EOPNOTSUPP;
3526
3527         drv_set_rekey_data(local, sdata, data);
3528
3529         return 0;
3530 }
3531
3532 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3533                                   const u8 *peer, u64 *cookie)
3534 {
3535         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3536         struct ieee80211_local *local = sdata->local;
3537         struct ieee80211_qos_hdr *nullfunc;
3538         struct sk_buff *skb, *ack_skb;
3539         int size = sizeof(*nullfunc);
3540         __le16 fc;
3541         bool qos;
3542         struct ieee80211_tx_info *info;
3543         struct sta_info *sta;
3544         struct ieee80211_chanctx_conf *chanctx_conf;
3545         enum ieee80211_band band;
3546         int ret;
3547
3548         /* the lock is needed to assign the cookie later */
3549         mutex_lock(&local->mtx);
3550
3551         rcu_read_lock();
3552         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3553         if (WARN_ON(!chanctx_conf)) {
3554                 ret = -EINVAL;
3555                 goto unlock;
3556         }
3557         band = chanctx_conf->def.chan->band;
3558         sta = sta_info_get_bss(sdata, peer);
3559         if (sta) {
3560                 qos = sta->sta.wme;
3561         } else {
3562                 ret = -ENOLINK;
3563                 goto unlock;
3564         }
3565
3566         if (qos) {
3567                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3568                                  IEEE80211_STYPE_QOS_NULLFUNC |
3569                                  IEEE80211_FCTL_FROMDS);
3570         } else {
3571                 size -= 2;
3572                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3573                                  IEEE80211_STYPE_NULLFUNC |
3574                                  IEEE80211_FCTL_FROMDS);
3575         }
3576
3577         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3578         if (!skb) {
3579                 ret = -ENOMEM;
3580                 goto unlock;
3581         }
3582
3583         skb->dev = dev;
3584
3585         skb_reserve(skb, local->hw.extra_tx_headroom);
3586
3587         nullfunc = (void *) skb_put(skb, size);
3588         nullfunc->frame_control = fc;
3589         nullfunc->duration_id = 0;
3590         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3591         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3592         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3593         nullfunc->seq_ctrl = 0;
3594
3595         info = IEEE80211_SKB_CB(skb);
3596
3597         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3598                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3599         info->band = band;
3600
3601         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3602         skb->priority = 7;
3603         if (qos)
3604                 nullfunc->qos_ctrl = cpu_to_le16(7);
3605
3606         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3607         if (IS_ERR(ack_skb)) {
3608                 kfree_skb(skb);
3609                 ret = PTR_ERR(ack_skb);
3610                 goto unlock;
3611         }
3612
3613         local_bh_disable();
3614         ieee80211_xmit(sdata, sta, skb);
3615         local_bh_enable();
3616
3617         ret = 0;
3618 unlock:
3619         rcu_read_unlock();
3620         mutex_unlock(&local->mtx);
3621
3622         return ret;
3623 }
3624
3625 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3626                                      struct wireless_dev *wdev,
3627                                      struct cfg80211_chan_def *chandef)
3628 {
3629         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3630         struct ieee80211_local *local = wiphy_priv(wiphy);
3631         struct ieee80211_chanctx_conf *chanctx_conf;
3632         int ret = -ENODATA;
3633
3634         rcu_read_lock();
3635         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3636         if (chanctx_conf) {
3637                 *chandef = sdata->vif.bss_conf.chandef;
3638                 ret = 0;
3639         } else if (local->open_count > 0 &&
3640                    local->open_count == local->monitors &&
3641                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3642                 if (local->use_chanctx)
3643                         *chandef = local->monitor_chandef;
3644                 else
3645                         *chandef = local->_oper_chandef;
3646                 ret = 0;
3647         }
3648         rcu_read_unlock();
3649
3650         return ret;
3651 }
3652
3653 #ifdef CONFIG_PM
3654 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3655 {
3656         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3657 }
3658 #endif
3659
3660 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3661                                  struct net_device *dev,
3662                                  struct cfg80211_qos_map *qos_map)
3663 {
3664         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3665         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3666
3667         if (qos_map) {
3668                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3669                 if (!new_qos_map)
3670                         return -ENOMEM;
3671                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3672         } else {
3673                 /* A NULL qos_map was passed to disable QoS mapping */
3674                 new_qos_map = NULL;
3675         }
3676
3677         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3678         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3679         if (old_qos_map)
3680                 kfree_rcu(old_qos_map, rcu_head);
3681
3682         return 0;
3683 }
3684
3685 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3686                                       struct net_device *dev,
3687                                       struct cfg80211_chan_def *chandef)
3688 {
3689         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3690         int ret;
3691         u32 changed = 0;
3692
3693         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3694         if (ret == 0)
3695                 ieee80211_bss_info_change_notify(sdata, changed);
3696
3697         return ret;
3698 }
3699
3700 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3701                                u8 tsid, const u8 *peer, u8 up,
3702                                u16 admitted_time)
3703 {
3704         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3705         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3706         int ac = ieee802_1d_to_ac[up];
3707
3708         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3709                 return -EOPNOTSUPP;
3710
3711         if (!(sdata->wmm_acm & BIT(up)))
3712                 return -EINVAL;
3713
3714         if (ifmgd->tx_tspec[ac].admitted_time)
3715                 return -EBUSY;
3716
3717         if (admitted_time) {
3718                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3719                 ifmgd->tx_tspec[ac].tsid = tsid;
3720                 ifmgd->tx_tspec[ac].up = up;
3721         }
3722
3723         return 0;
3724 }
3725
3726 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3727                                u8 tsid, const u8 *peer)
3728 {
3729         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3730         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3731         struct ieee80211_local *local = wiphy_priv(wiphy);
3732         int ac;
3733
3734         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3735                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3736
3737                 /* skip unused entries */
3738                 if (!tx_tspec->admitted_time)
3739                         continue;
3740
3741                 if (tx_tspec->tsid != tsid)
3742                         continue;
3743
3744                 /* due to this new packets will be reassigned to non-ACM ACs */
3745                 tx_tspec->up = -1;
3746
3747                 /* Make sure that all packets have been sent to avoid to
3748                  * restore the QoS params on packets that are still on the
3749                  * queues.
3750                  */
3751                 synchronize_net();
3752                 ieee80211_flush_queues(local, sdata, false);
3753
3754                 /* restore the normal QoS parameters
3755                  * (unconditionally to avoid races)
3756                  */
3757                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3758                 tx_tspec->downgraded = false;
3759                 ieee80211_sta_handle_tspec_ac_params(sdata);
3760
3761                 /* finally clear all the data */
3762                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3763
3764                 return 0;
3765         }
3766
3767         return -ENOENT;
3768 }
3769
3770 const struct cfg80211_ops mac80211_config_ops = {
3771         .add_virtual_intf = ieee80211_add_iface,
3772         .del_virtual_intf = ieee80211_del_iface,
3773         .change_virtual_intf = ieee80211_change_iface,
3774         .start_p2p_device = ieee80211_start_p2p_device,
3775         .stop_p2p_device = ieee80211_stop_p2p_device,
3776         .add_key = ieee80211_add_key,
3777         .del_key = ieee80211_del_key,
3778         .get_key = ieee80211_get_key,
3779         .set_default_key = ieee80211_config_default_key,
3780         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3781         .start_ap = ieee80211_start_ap,
3782         .change_beacon = ieee80211_change_beacon,
3783         .stop_ap = ieee80211_stop_ap,
3784         .add_station = ieee80211_add_station,
3785         .del_station = ieee80211_del_station,
3786         .change_station = ieee80211_change_station,
3787         .get_station = ieee80211_get_station,
3788         .dump_station = ieee80211_dump_station,
3789         .dump_survey = ieee80211_dump_survey,
3790 #ifdef CONFIG_MAC80211_MESH
3791         .add_mpath = ieee80211_add_mpath,
3792         .del_mpath = ieee80211_del_mpath,
3793         .change_mpath = ieee80211_change_mpath,
3794         .get_mpath = ieee80211_get_mpath,
3795         .dump_mpath = ieee80211_dump_mpath,
3796         .get_mpp = ieee80211_get_mpp,
3797         .dump_mpp = ieee80211_dump_mpp,
3798         .update_mesh_config = ieee80211_update_mesh_config,
3799         .get_mesh_config = ieee80211_get_mesh_config,
3800         .join_mesh = ieee80211_join_mesh,
3801         .leave_mesh = ieee80211_leave_mesh,
3802 #endif
3803         .join_ocb = ieee80211_join_ocb,
3804         .leave_ocb = ieee80211_leave_ocb,
3805         .change_bss = ieee80211_change_bss,
3806         .set_txq_params = ieee80211_set_txq_params,
3807         .set_monitor_channel = ieee80211_set_monitor_channel,
3808         .suspend = ieee80211_suspend,
3809         .resume = ieee80211_resume,
3810         .scan = ieee80211_scan,
3811         .sched_scan_start = ieee80211_sched_scan_start,
3812         .sched_scan_stop = ieee80211_sched_scan_stop,
3813         .auth = ieee80211_auth,
3814         .assoc = ieee80211_assoc,
3815         .deauth = ieee80211_deauth,
3816         .disassoc = ieee80211_disassoc,
3817         .join_ibss = ieee80211_join_ibss,
3818         .leave_ibss = ieee80211_leave_ibss,
3819         .set_mcast_rate = ieee80211_set_mcast_rate,
3820         .set_wiphy_params = ieee80211_set_wiphy_params,
3821         .set_tx_power = ieee80211_set_tx_power,
3822         .get_tx_power = ieee80211_get_tx_power,
3823         .set_wds_peer = ieee80211_set_wds_peer,
3824         .rfkill_poll = ieee80211_rfkill_poll,
3825         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3826         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3827         .set_power_mgmt = ieee80211_set_power_mgmt,
3828         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3829         .remain_on_channel = ieee80211_remain_on_channel,
3830         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3831         .mgmt_tx = ieee80211_mgmt_tx,
3832         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3833         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3834         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3835         .set_antenna = ieee80211_set_antenna,
3836         .get_antenna = ieee80211_get_antenna,
3837         .set_rekey_data = ieee80211_set_rekey_data,
3838         .tdls_oper = ieee80211_tdls_oper,
3839         .tdls_mgmt = ieee80211_tdls_mgmt,
3840         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3841         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3842         .probe_client = ieee80211_probe_client,
3843         .set_noack_map = ieee80211_set_noack_map,
3844 #ifdef CONFIG_PM
3845         .set_wakeup = ieee80211_set_wakeup,
3846 #endif
3847         .get_channel = ieee80211_cfg_get_channel,
3848         .start_radar_detection = ieee80211_start_radar_detection,
3849         .channel_switch = ieee80211_channel_switch,
3850         .set_qos_map = ieee80211_set_qos_map,
3851         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3852         .add_tx_ts = ieee80211_add_tx_ts,
3853         .del_tx_ts = ieee80211_del_tx_ts,
3854 };