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_RATE_CONTROL))
 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 void sta_apply_mesh_params(struct ieee80211_local *local,
1023                                   struct sta_info *sta,
1024                                   struct station_parameters *params)
1025 {
1026 #ifdef CONFIG_MAC80211_MESH
1027         struct ieee80211_sub_if_data *sdata = sta->sdata;
1028         u32 changed = 0;
1029
1030         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
1031                 switch (params->plink_state) {
1032                 case NL80211_PLINK_ESTAB:
1033                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
1034                                 changed = mesh_plink_inc_estab_count(sdata);
1035                         sta->mesh->plink_state = params->plink_state;
1036
1037                         ieee80211_mps_sta_status_update(sta);
1038                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1039                                       sdata->u.mesh.mshcfg.power_mode);
1040                         break;
1041                 case NL80211_PLINK_LISTEN:
1042                 case NL80211_PLINK_BLOCKED:
1043                 case NL80211_PLINK_OPN_SNT:
1044                 case NL80211_PLINK_OPN_RCVD:
1045                 case NL80211_PLINK_CNF_RCVD:
1046                 case NL80211_PLINK_HOLDING:
1047                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
1048                                 changed = mesh_plink_dec_estab_count(sdata);
1049                         sta->mesh->plink_state = params->plink_state;
1050
1051                         ieee80211_mps_sta_status_update(sta);
1052                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1053                                         NL80211_MESH_POWER_UNKNOWN);
1054                         break;
1055                 default:
1056                         /*  nothing  */
1057                         break;
1058                 }
1059         }
1060
1061         switch (params->plink_action) {
1062         case NL80211_PLINK_ACTION_NO_ACTION:
1063                 /* nothing */
1064                 break;
1065         case NL80211_PLINK_ACTION_OPEN:
1066                 changed |= mesh_plink_open(sta);
1067                 break;
1068         case NL80211_PLINK_ACTION_BLOCK:
1069                 changed |= mesh_plink_block(sta);
1070                 break;
1071         }
1072
1073         if (params->local_pm)
1074                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1075                                                           params->local_pm);
1076
1077         ieee80211_mbss_info_change_notify(sdata, changed);
1078 #endif
1079 }
1080
1081 static int sta_apply_parameters(struct ieee80211_local *local,
1082                                 struct sta_info *sta,
1083                                 struct station_parameters *params)
1084 {
1085         int ret = 0;
1086         struct ieee80211_supported_band *sband;
1087         struct ieee80211_sub_if_data *sdata = sta->sdata;
1088         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1089         u32 mask, set;
1090
1091         sband = local->hw.wiphy->bands[band];
1092
1093         mask = params->sta_flags_mask;
1094         set = params->sta_flags_set;
1095
1096         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1097                 /*
1098                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1099                  * API but must follow AUTHENTICATED for driver state.
1100                  */
1101                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1102                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1103                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1104                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1105         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1106                 /*
1107                  * TDLS -- everything follows authorized, but
1108                  * only becoming authorized is possible, not
1109                  * going back
1110                  */
1111                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1112                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1113                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1114                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1115                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1116                 }
1117         }
1118
1119         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1120             local->hw.queues >= IEEE80211_NUM_ACS)
1121                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1122
1123         /* auth flags will be set later for TDLS,
1124          * and for unassociated stations that move to assocaited */
1125         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1126             !((mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1127               (set & BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1128                 ret = sta_apply_auth_flags(local, sta, mask, set);
1129                 if (ret)
1130                         return ret;
1131         }
1132
1133         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1134                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1135                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1136                 else
1137                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1138         }
1139
1140         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1141                 if (set & BIT(NL80211_STA_FLAG_MFP))
1142                         set_sta_flag(sta, WLAN_STA_MFP);
1143                 else
1144                         clear_sta_flag(sta, WLAN_STA_MFP);
1145         }
1146
1147         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1148                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1149                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1150                 else
1151                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1152         }
1153
1154         /* mark TDLS channel switch support, if the AP allows it */
1155         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1156             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1157             params->ext_capab_len >= 4 &&
1158             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1159                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1160
1161         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1162             !sdata->u.mgd.tdls_wider_bw_prohibited &&
1163             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1164             params->ext_capab_len >= 8 &&
1165             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1166                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1167
1168         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1169                 sta->sta.uapsd_queues = params->uapsd_queues;
1170                 sta->sta.max_sp = params->max_sp;
1171         }
1172
1173         /*
1174          * cfg80211 validates this (1-2007) and allows setting the AID
1175          * only when creating a new station entry
1176          */
1177         if (params->aid)
1178                 sta->sta.aid = params->aid;
1179
1180         /*
1181          * Some of the following updates would be racy if called on an
1182          * existing station, via ieee80211_change_station(). However,
1183          * all such changes are rejected by cfg80211 except for updates
1184          * changing the supported rates on an existing but not yet used
1185          * TDLS peer.
1186          */
1187
1188         if (params->listen_interval >= 0)
1189                 sta->listen_interval = params->listen_interval;
1190
1191         if (params->supported_rates) {
1192                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1193                                          sband, params->supported_rates,
1194                                          params->supported_rates_len,
1195                                          &sta->sta.supp_rates[band]);
1196         }
1197
1198         if (params->ht_capa)
1199                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1200                                                   params->ht_capa, sta);
1201
1202         if (params->vht_capa)
1203                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1204                                                     params->vht_capa, sta);
1205
1206         if (params->opmode_notif_used) {
1207                 /* returned value is only needed for rc update, but the
1208                  * rc isn't initialized here yet, so ignore it
1209                  */
1210                 __ieee80211_vht_handle_opmode(sdata, sta,
1211                                               params->opmode_notif,
1212                                               band, false);
1213         }
1214
1215         if (ieee80211_vif_is_mesh(&sdata->vif))
1216                 sta_apply_mesh_params(local, sta, params);
1217
1218         /* set the STA state after all sta info from usermode has been set */
1219         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
1220             set & BIT(NL80211_STA_FLAG_ASSOCIATED)) {
1221                 ret = sta_apply_auth_flags(local, sta, mask, set);
1222                 if (ret)
1223                         return ret;
1224         }
1225
1226         return 0;
1227 }
1228
1229 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1230                                  const u8 *mac,
1231                                  struct station_parameters *params)
1232 {
1233         struct ieee80211_local *local = wiphy_priv(wiphy);
1234         struct sta_info *sta;
1235         struct ieee80211_sub_if_data *sdata;
1236         int err;
1237         int layer2_update;
1238
1239         if (params->vlan) {
1240                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1241
1242                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1243                     sdata->vif.type != NL80211_IFTYPE_AP)
1244                         return -EINVAL;
1245         } else
1246                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1247
1248         if (ether_addr_equal(mac, sdata->vif.addr))
1249                 return -EINVAL;
1250
1251         if (is_multicast_ether_addr(mac))
1252                 return -EINVAL;
1253
1254         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1255         if (!sta)
1256                 return -ENOMEM;
1257
1258         /*
1259          * defaults -- if userspace wants something else we'll
1260          * change it accordingly in sta_apply_parameters()
1261          */
1262         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
1263             !(params->sta_flags_set & (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1264                                         BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1265                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1266                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1267         }
1268         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1269                 sta->sta.tdls = true;
1270
1271         err = sta_apply_parameters(local, sta, params);
1272         if (err) {
1273                 sta_info_free(local, sta);
1274                 return err;
1275         }
1276
1277         /*
1278          * for TDLS and for unassociated station, rate control should be
1279          * initialized only when rates are known and station is marked
1280          * authorized/associated
1281          */
1282         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1283             test_sta_flag(sta, WLAN_STA_ASSOC))
1284                 rate_control_rate_init(sta);
1285
1286         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1287                 sdata->vif.type == NL80211_IFTYPE_AP;
1288
1289         err = sta_info_insert_rcu(sta);
1290         if (err) {
1291                 rcu_read_unlock();
1292                 return err;
1293         }
1294
1295         if (layer2_update)
1296                 ieee80211_send_layer2_update(sta);
1297
1298         rcu_read_unlock();
1299
1300         return 0;
1301 }
1302
1303 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1304                                  struct station_del_parameters *params)
1305 {
1306         struct ieee80211_sub_if_data *sdata;
1307
1308         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1309
1310         if (params->mac)
1311                 return sta_info_destroy_addr_bss(sdata, params->mac);
1312
1313         sta_info_flush(sdata);
1314         return 0;
1315 }
1316
1317 static int ieee80211_change_station(struct wiphy *wiphy,
1318                                     struct net_device *dev, const u8 *mac,
1319                                     struct station_parameters *params)
1320 {
1321         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1322         struct ieee80211_local *local = wiphy_priv(wiphy);
1323         struct sta_info *sta;
1324         struct ieee80211_sub_if_data *vlansdata;
1325         enum cfg80211_station_type statype;
1326         int err;
1327
1328         mutex_lock(&local->sta_mtx);
1329
1330         sta = sta_info_get_bss(sdata, mac);
1331         if (!sta) {
1332                 err = -ENOENT;
1333                 goto out_err;
1334         }
1335
1336         switch (sdata->vif.type) {
1337         case NL80211_IFTYPE_MESH_POINT:
1338                 if (sdata->u.mesh.user_mpm)
1339                         statype = CFG80211_STA_MESH_PEER_USER;
1340                 else
1341                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1342                 break;
1343         case NL80211_IFTYPE_ADHOC:
1344                 statype = CFG80211_STA_IBSS;
1345                 break;
1346         case NL80211_IFTYPE_STATION:
1347                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1348                         statype = CFG80211_STA_AP_STA;
1349                         break;
1350                 }
1351                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1352                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1353                 else
1354                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1355                 break;
1356         case NL80211_IFTYPE_AP:
1357         case NL80211_IFTYPE_AP_VLAN:
1358                 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1359                         statype = CFG80211_STA_AP_CLIENT;
1360                 else
1361                         statype = CFG80211_STA_AP_CLIENT_UNASSOC;
1362                 break;
1363         default:
1364                 err = -EOPNOTSUPP;
1365                 goto out_err;
1366         }
1367
1368         err = cfg80211_check_station_change(wiphy, params, statype);
1369         if (err)
1370                 goto out_err;
1371
1372         if (params->vlan && params->vlan != sta->sdata->dev) {
1373                 bool prev_4addr = false;
1374                 bool new_4addr = false;
1375
1376                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1377
1378                 if (params->vlan->ieee80211_ptr->use_4addr) {
1379                         if (vlansdata->u.vlan.sta) {
1380                                 err = -EBUSY;
1381                                 goto out_err;
1382                         }
1383
1384                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1385                         new_4addr = true;
1386                 }
1387
1388                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1389                     sta->sdata->u.vlan.sta) {
1390                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1391                         prev_4addr = true;
1392                 }
1393
1394                 sta->sdata = vlansdata;
1395                 ieee80211_check_fast_xmit(sta);
1396
1397                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1398                     prev_4addr != new_4addr) {
1399                         if (new_4addr)
1400                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1401                         else
1402                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1403                 }
1404
1405                 ieee80211_send_layer2_update(sta);
1406         }
1407
1408         err = sta_apply_parameters(local, sta, params);
1409         if (err)
1410                 goto out_err;
1411
1412         mutex_unlock(&local->sta_mtx);
1413
1414         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1415              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1416             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1417             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1418             sta_info_tx_streams(sta) != 1) {
1419                 ht_dbg(sta->sdata,
1420                        "%pM just authorized and MIMO capable - update SMPS\n",
1421                        sta->sta.addr);
1422                 ieee80211_send_smps_action(sta->sdata,
1423                         sta->sdata->bss->req_smps,
1424                         sta->sta.addr,
1425                         sta->sdata->vif.bss_conf.bssid);
1426         }
1427
1428         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1429             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1430                 ieee80211_recalc_ps(local, -1);
1431                 ieee80211_recalc_ps_vif(sdata);
1432         }
1433
1434         return 0;
1435 out_err:
1436         mutex_unlock(&local->sta_mtx);
1437         return err;
1438 }
1439
1440 #ifdef CONFIG_MAC80211_MESH
1441 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1442                                const u8 *dst, const u8 *next_hop)
1443 {
1444         struct ieee80211_sub_if_data *sdata;
1445         struct mesh_path *mpath;
1446         struct sta_info *sta;
1447
1448         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1449
1450         rcu_read_lock();
1451         sta = sta_info_get(sdata, next_hop);
1452         if (!sta) {
1453                 rcu_read_unlock();
1454                 return -ENOENT;
1455         }
1456
1457         mpath = mesh_path_add(sdata, dst);
1458         if (IS_ERR(mpath)) {
1459                 rcu_read_unlock();
1460                 return PTR_ERR(mpath);
1461         }
1462
1463         mesh_path_fix_nexthop(mpath, sta);
1464
1465         rcu_read_unlock();
1466         return 0;
1467 }
1468
1469 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1470                                const u8 *dst)
1471 {
1472         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1473
1474         if (dst)
1475                 return mesh_path_del(sdata, dst);
1476
1477         mesh_path_flush_by_iface(sdata);
1478         return 0;
1479 }
1480
1481 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1482                                   const u8 *dst, const u8 *next_hop)
1483 {
1484         struct ieee80211_sub_if_data *sdata;
1485         struct mesh_path *mpath;
1486         struct sta_info *sta;
1487
1488         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1489
1490         rcu_read_lock();
1491
1492         sta = sta_info_get(sdata, next_hop);
1493         if (!sta) {
1494                 rcu_read_unlock();
1495                 return -ENOENT;
1496         }
1497
1498         mpath = mesh_path_lookup(sdata, dst);
1499         if (!mpath) {
1500                 rcu_read_unlock();
1501                 return -ENOENT;
1502         }
1503
1504         mesh_path_fix_nexthop(mpath, sta);
1505
1506         rcu_read_unlock();
1507         return 0;
1508 }
1509
1510 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1511                             struct mpath_info *pinfo)
1512 {
1513         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1514
1515         if (next_hop_sta)
1516                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1517         else
1518                 eth_zero_addr(next_hop);
1519
1520         memset(pinfo, 0, sizeof(*pinfo));
1521
1522         pinfo->generation = mesh_paths_generation;
1523
1524         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1525                         MPATH_INFO_SN |
1526                         MPATH_INFO_METRIC |
1527                         MPATH_INFO_EXPTIME |
1528                         MPATH_INFO_DISCOVERY_TIMEOUT |
1529                         MPATH_INFO_DISCOVERY_RETRIES |
1530                         MPATH_INFO_FLAGS;
1531
1532         pinfo->frame_qlen = mpath->frame_queue.qlen;
1533         pinfo->sn = mpath->sn;
1534         pinfo->metric = mpath->metric;
1535         if (time_before(jiffies, mpath->exp_time))
1536                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1537         pinfo->discovery_timeout =
1538                         jiffies_to_msecs(mpath->discovery_timeout);
1539         pinfo->discovery_retries = mpath->discovery_retries;
1540         if (mpath->flags & MESH_PATH_ACTIVE)
1541                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1542         if (mpath->flags & MESH_PATH_RESOLVING)
1543                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1544         if (mpath->flags & MESH_PATH_SN_VALID)
1545                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1546         if (mpath->flags & MESH_PATH_FIXED)
1547                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1548         if (mpath->flags & MESH_PATH_RESOLVED)
1549                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1550 }
1551
1552 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1553                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1554
1555 {
1556         struct ieee80211_sub_if_data *sdata;
1557         struct mesh_path *mpath;
1558
1559         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1560
1561         rcu_read_lock();
1562         mpath = mesh_path_lookup(sdata, dst);
1563         if (!mpath) {
1564                 rcu_read_unlock();
1565                 return -ENOENT;
1566         }
1567         memcpy(dst, mpath->dst, ETH_ALEN);
1568         mpath_set_pinfo(mpath, next_hop, pinfo);
1569         rcu_read_unlock();
1570         return 0;
1571 }
1572
1573 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1574                                 int idx, u8 *dst, u8 *next_hop,
1575                                 struct mpath_info *pinfo)
1576 {
1577         struct ieee80211_sub_if_data *sdata;
1578         struct mesh_path *mpath;
1579
1580         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1581
1582         rcu_read_lock();
1583         mpath = mesh_path_lookup_by_idx(sdata, idx);
1584         if (!mpath) {
1585                 rcu_read_unlock();
1586                 return -ENOENT;
1587         }
1588         memcpy(dst, mpath->dst, ETH_ALEN);
1589         mpath_set_pinfo(mpath, next_hop, pinfo);
1590         rcu_read_unlock();
1591         return 0;
1592 }
1593
1594 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1595                           struct mpath_info *pinfo)
1596 {
1597         memset(pinfo, 0, sizeof(*pinfo));
1598         memcpy(mpp, mpath->mpp, ETH_ALEN);
1599
1600         pinfo->generation = mpp_paths_generation;
1601 }
1602
1603 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1604                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1605
1606 {
1607         struct ieee80211_sub_if_data *sdata;
1608         struct mesh_path *mpath;
1609
1610         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1611
1612         rcu_read_lock();
1613         mpath = mpp_path_lookup(sdata, dst);
1614         if (!mpath) {
1615                 rcu_read_unlock();
1616                 return -ENOENT;
1617         }
1618         memcpy(dst, mpath->dst, ETH_ALEN);
1619         mpp_set_pinfo(mpath, mpp, pinfo);
1620         rcu_read_unlock();
1621         return 0;
1622 }
1623
1624 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1625                               int idx, u8 *dst, u8 *mpp,
1626                               struct mpath_info *pinfo)
1627 {
1628         struct ieee80211_sub_if_data *sdata;
1629         struct mesh_path *mpath;
1630
1631         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1632
1633         rcu_read_lock();
1634         mpath = mpp_path_lookup_by_idx(sdata, idx);
1635         if (!mpath) {
1636                 rcu_read_unlock();
1637                 return -ENOENT;
1638         }
1639         memcpy(dst, mpath->dst, ETH_ALEN);
1640         mpp_set_pinfo(mpath, mpp, pinfo);
1641         rcu_read_unlock();
1642         return 0;
1643 }
1644
1645 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1646                                 struct net_device *dev,
1647                                 struct mesh_config *conf)
1648 {
1649         struct ieee80211_sub_if_data *sdata;
1650         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1651
1652         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1653         return 0;
1654 }
1655
1656 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1657 {
1658         return (mask >> (parm-1)) & 0x1;
1659 }
1660
1661 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1662                 const struct mesh_setup *setup)
1663 {
1664         u8 *new_ie;
1665         const u8 *old_ie;
1666         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1667                                         struct ieee80211_sub_if_data, u.mesh);
1668
1669         /* allocate information elements */
1670         new_ie = NULL;
1671         old_ie = ifmsh->ie;
1672
1673         if (setup->ie_len) {
1674                 new_ie = kmemdup(setup->ie, setup->ie_len,
1675                                 GFP_KERNEL);
1676                 if (!new_ie)
1677                         return -ENOMEM;
1678         }
1679         ifmsh->ie_len = setup->ie_len;
1680         ifmsh->ie = new_ie;
1681         kfree(old_ie);
1682
1683         /* now copy the rest of the setup parameters */
1684         ifmsh->mesh_id_len = setup->mesh_id_len;
1685         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1686         ifmsh->mesh_sp_id = setup->sync_method;
1687         ifmsh->mesh_pp_id = setup->path_sel_proto;
1688         ifmsh->mesh_pm_id = setup->path_metric;
1689         ifmsh->user_mpm = setup->user_mpm;
1690         ifmsh->mesh_auth_id = setup->auth_id;
1691         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1692         if (setup->is_authenticated)
1693                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1694         if (setup->is_secure)
1695                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1696
1697         /* mcast rate setting in Mesh Node */
1698         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1699                                                 sizeof(setup->mcast_rate));
1700         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1701
1702         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1703         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1704
1705         return 0;
1706 }
1707
1708 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1709                                         struct net_device *dev, u32 mask,
1710                                         const struct mesh_config *nconf)
1711 {
1712         struct mesh_config *conf;
1713         struct ieee80211_sub_if_data *sdata;
1714         struct ieee80211_if_mesh *ifmsh;
1715
1716         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1717         ifmsh = &sdata->u.mesh;
1718
1719         /* Set the config options which we are interested in setting */
1720         conf = &(sdata->u.mesh.mshcfg);
1721         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1722                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1723         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1724                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1725         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1726                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1727         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1728                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1729         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1730                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1731         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1732                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1733         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1734                 conf->element_ttl = nconf->element_ttl;
1735         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1736                 if (ifmsh->user_mpm)
1737                         return -EBUSY;
1738                 conf->auto_open_plinks = nconf->auto_open_plinks;
1739         }
1740         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1741                 conf->dot11MeshNbrOffsetMaxNeighbor =
1742                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1743         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1744                 conf->dot11MeshHWMPmaxPREQretries =
1745                         nconf->dot11MeshHWMPmaxPREQretries;
1746         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1747                 conf->path_refresh_time = nconf->path_refresh_time;
1748         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1749                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1750         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1751                 conf->dot11MeshHWMPactivePathTimeout =
1752                         nconf->dot11MeshHWMPactivePathTimeout;
1753         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1754                 conf->dot11MeshHWMPpreqMinInterval =
1755                         nconf->dot11MeshHWMPpreqMinInterval;
1756         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1757                 conf->dot11MeshHWMPperrMinInterval =
1758                         nconf->dot11MeshHWMPperrMinInterval;
1759         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1760                            mask))
1761                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1762                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1763         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1764                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1765                 ieee80211_mesh_root_setup(ifmsh);
1766         }
1767         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1768                 /* our current gate announcement implementation rides on root
1769                  * announcements, so require this ifmsh to also be a root node
1770                  * */
1771                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1772                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1773                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1774                         ieee80211_mesh_root_setup(ifmsh);
1775                 }
1776                 conf->dot11MeshGateAnnouncementProtocol =
1777                         nconf->dot11MeshGateAnnouncementProtocol;
1778         }
1779         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1780                 conf->dot11MeshHWMPRannInterval =
1781                         nconf->dot11MeshHWMPRannInterval;
1782         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1783                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1784         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1785                 /* our RSSI threshold implementation is supported only for
1786                  * devices that report signal in dBm.
1787                  */
1788                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1789                         return -ENOTSUPP;
1790                 conf->rssi_threshold = nconf->rssi_threshold;
1791         }
1792         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1793                 conf->ht_opmode = nconf->ht_opmode;
1794                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1795                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1796         }
1797         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1798                 conf->dot11MeshHWMPactivePathToRootTimeout =
1799                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1800         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1801                 conf->dot11MeshHWMProotInterval =
1802                         nconf->dot11MeshHWMProotInterval;
1803         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1804                 conf->dot11MeshHWMPconfirmationInterval =
1805                         nconf->dot11MeshHWMPconfirmationInterval;
1806         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1807                 conf->power_mode = nconf->power_mode;
1808                 ieee80211_mps_local_status_update(sdata);
1809         }
1810         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1811                 conf->dot11MeshAwakeWindowDuration =
1812                         nconf->dot11MeshAwakeWindowDuration;
1813         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1814                 conf->plink_timeout = nconf->plink_timeout;
1815         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1816         return 0;
1817 }
1818
1819 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1820                                const struct mesh_config *conf,
1821                                const struct mesh_setup *setup)
1822 {
1823         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1824         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1825         int err;
1826
1827         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1828         err = copy_mesh_setup(ifmsh, setup);
1829         if (err)
1830                 return err;
1831
1832         /* can mesh use other SMPS modes? */
1833         sdata->smps_mode = IEEE80211_SMPS_OFF;
1834         sdata->needed_rx_chains = sdata->local->rx_chains;
1835
1836         mutex_lock(&sdata->local->mtx);
1837         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1838                                         IEEE80211_CHANCTX_SHARED);
1839         mutex_unlock(&sdata->local->mtx);
1840         if (err)
1841                 return err;
1842
1843         return ieee80211_start_mesh(sdata);
1844 }
1845
1846 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1847 {
1848         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1849
1850         ieee80211_stop_mesh(sdata);
1851         mutex_lock(&sdata->local->mtx);
1852         ieee80211_vif_release_channel(sdata);
1853         mutex_unlock(&sdata->local->mtx);
1854
1855         return 0;
1856 }
1857 #endif
1858
1859 static int ieee80211_change_bss(struct wiphy *wiphy,
1860                                 struct net_device *dev,
1861                                 struct bss_parameters *params)
1862 {
1863         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1864         enum ieee80211_band band;
1865         u32 changed = 0;
1866
1867         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1868                 return -ENOENT;
1869
1870         band = ieee80211_get_sdata_band(sdata);
1871
1872         if (params->use_cts_prot >= 0) {
1873                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1874                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1875         }
1876         if (params->use_short_preamble >= 0) {
1877                 sdata->vif.bss_conf.use_short_preamble =
1878                         params->use_short_preamble;
1879                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1880         }
1881
1882         if (!sdata->vif.bss_conf.use_short_slot &&
1883             band == IEEE80211_BAND_5GHZ) {
1884                 sdata->vif.bss_conf.use_short_slot = true;
1885                 changed |= BSS_CHANGED_ERP_SLOT;
1886         }
1887
1888         if (params->use_short_slot_time >= 0) {
1889                 sdata->vif.bss_conf.use_short_slot =
1890                         params->use_short_slot_time;
1891                 changed |= BSS_CHANGED_ERP_SLOT;
1892         }
1893
1894         if (params->basic_rates) {
1895                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1896                                          wiphy->bands[band],
1897                                          params->basic_rates,
1898                                          params->basic_rates_len,
1899                                          &sdata->vif.bss_conf.basic_rates);
1900                 changed |= BSS_CHANGED_BASIC_RATES;
1901         }
1902
1903         if (params->ap_isolate >= 0) {
1904                 if (params->ap_isolate)
1905                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1906                 else
1907                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1908         }
1909
1910         if (params->ht_opmode >= 0) {
1911                 sdata->vif.bss_conf.ht_operation_mode =
1912                         (u16) params->ht_opmode;
1913                 changed |= BSS_CHANGED_HT;
1914         }
1915
1916         if (params->p2p_ctwindow >= 0) {
1917                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1918                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1919                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1920                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1921                 changed |= BSS_CHANGED_P2P_PS;
1922         }
1923
1924         if (params->p2p_opp_ps > 0) {
1925                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1926                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1927                 changed |= BSS_CHANGED_P2P_PS;
1928         } else if (params->p2p_opp_ps == 0) {
1929                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1930                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1931                 changed |= BSS_CHANGED_P2P_PS;
1932         }
1933
1934         ieee80211_bss_info_change_notify(sdata, changed);
1935
1936         return 0;
1937 }
1938
1939 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1940                                     struct net_device *dev,
1941                                     struct ieee80211_txq_params *params)
1942 {
1943         struct ieee80211_local *local = wiphy_priv(wiphy);
1944         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1945         struct ieee80211_tx_queue_params p;
1946
1947         if (!local->ops->conf_tx)
1948                 return -EOPNOTSUPP;
1949
1950         if (local->hw.queues < IEEE80211_NUM_ACS)
1951                 return -EOPNOTSUPP;
1952
1953         memset(&p, 0, sizeof(p));
1954         p.aifs = params->aifs;
1955         p.cw_max = params->cwmax;
1956         p.cw_min = params->cwmin;
1957         p.txop = params->txop;
1958
1959         /*
1960          * Setting tx queue params disables u-apsd because it's only
1961          * called in master mode.
1962          */
1963         p.uapsd = false;
1964
1965         sdata->tx_conf[params->ac] = p;
1966         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1967                 wiphy_debug(local->hw.wiphy,
1968                             "failed to set TX queue parameters for AC %d\n",
1969                             params->ac);
1970                 return -EINVAL;
1971         }
1972
1973         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1974
1975         return 0;
1976 }
1977
1978 #ifdef CONFIG_PM
1979 static int ieee80211_suspend(struct wiphy *wiphy,
1980                              struct cfg80211_wowlan *wowlan)
1981 {
1982         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1983 }
1984
1985 static int ieee80211_resume(struct wiphy *wiphy)
1986 {
1987         return __ieee80211_resume(wiphy_priv(wiphy));
1988 }
1989 #else
1990 #define ieee80211_suspend NULL
1991 #define ieee80211_resume NULL
1992 #endif
1993
1994 static int ieee80211_scan(struct wiphy *wiphy,
1995                           struct cfg80211_scan_request *req)
1996 {
1997         struct ieee80211_sub_if_data *sdata;
1998
1999         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
2000
2001         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
2002         case NL80211_IFTYPE_STATION:
2003         case NL80211_IFTYPE_ADHOC:
2004         case NL80211_IFTYPE_MESH_POINT:
2005         case NL80211_IFTYPE_P2P_CLIENT:
2006         case NL80211_IFTYPE_P2P_DEVICE:
2007                 break;
2008         case NL80211_IFTYPE_P2P_GO:
2009                 if (sdata->local->ops->hw_scan)
2010                         break;
2011                 /*
2012                  * FIXME: implement NoA while scanning in software,
2013                  * for now fall through to allow scanning only when
2014                  * beaconing hasn't been configured yet
2015                  */
2016         case NL80211_IFTYPE_AP:
2017                 /*
2018                  * If the scan has been forced (and the driver supports
2019                  * forcing), don't care about being beaconing already.
2020                  * This will create problems to the attached stations (e.g. all
2021                  * the  frames sent while scanning on other channel will be
2022                  * lost)
2023                  */
2024                 if (sdata->u.ap.beacon &&
2025                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
2026                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2027                         return -EOPNOTSUPP;
2028                 break;
2029         default:
2030                 return -EOPNOTSUPP;
2031         }
2032
2033         return ieee80211_request_scan(sdata, req);
2034 }
2035
2036 static int
2037 ieee80211_sched_scan_start(struct wiphy *wiphy,
2038                            struct net_device *dev,
2039                            struct cfg80211_sched_scan_request *req)
2040 {
2041         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2042
2043         if (!sdata->local->ops->sched_scan_start)
2044                 return -EOPNOTSUPP;
2045
2046         return ieee80211_request_sched_scan_start(sdata, req);
2047 }
2048
2049 static int
2050 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2051 {
2052         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2053
2054         if (!sdata->local->ops->sched_scan_stop)
2055                 return -EOPNOTSUPP;
2056
2057         return ieee80211_request_sched_scan_stop(sdata);
2058 }
2059
2060 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2061                           struct cfg80211_auth_request *req)
2062 {
2063         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2064 }
2065
2066 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2067                            struct cfg80211_assoc_request *req)
2068 {
2069         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2070 }
2071
2072 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2073                             struct cfg80211_deauth_request *req)
2074 {
2075         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2076 }
2077
2078 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2079                               struct cfg80211_disassoc_request *req)
2080 {
2081         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2082 }
2083
2084 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2085                                struct cfg80211_ibss_params *params)
2086 {
2087         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2088 }
2089
2090 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2091 {
2092         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2093 }
2094
2095 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2096                               struct ocb_setup *setup)
2097 {
2098         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2099 }
2100
2101 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2102 {
2103         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2104 }
2105
2106 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2107                                     int rate[IEEE80211_NUM_BANDS])
2108 {
2109         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2110
2111         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2112                sizeof(int) * IEEE80211_NUM_BANDS);
2113
2114         return 0;
2115 }
2116
2117 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2118 {
2119         struct ieee80211_local *local = wiphy_priv(wiphy);
2120         int err;
2121
2122         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2123                 ieee80211_check_fast_xmit_all(local);
2124
2125                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2126
2127                 if (err) {
2128                         ieee80211_check_fast_xmit_all(local);
2129                         return err;
2130                 }
2131         }
2132
2133         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2134             (changed & WIPHY_PARAM_DYN_ACK)) {
2135                 s16 coverage_class;
2136
2137                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2138                                         wiphy->coverage_class : -1;
2139                 err = drv_set_coverage_class(local, coverage_class);
2140
2141                 if (err)
2142                         return err;
2143         }
2144
2145         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2146                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2147
2148                 if (err)
2149                         return err;
2150         }
2151
2152         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2153                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2154                         return -EINVAL;
2155                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2156         }
2157         if (changed & WIPHY_PARAM_RETRY_LONG) {
2158                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2159                         return -EINVAL;
2160                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2161         }
2162         if (changed &
2163             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2164                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2165
2166         return 0;
2167 }
2168
2169 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2170                                   struct wireless_dev *wdev,
2171                                   enum nl80211_tx_power_setting type, int mbm)
2172 {
2173         struct ieee80211_local *local = wiphy_priv(wiphy);
2174         struct ieee80211_sub_if_data *sdata;
2175         enum nl80211_tx_power_setting txp_type = type;
2176         bool update_txp_type = false;
2177
2178         if (wdev) {
2179                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2180
2181                 switch (type) {
2182                 case NL80211_TX_POWER_AUTOMATIC:
2183                         sdata->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                         sdata->user_power_level = MBM_TO_DBM(mbm);
2191                         break;
2192                 }
2193
2194                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2195                         update_txp_type = true;
2196                         sdata->vif.bss_conf.txpower_type = txp_type;
2197                 }
2198
2199                 ieee80211_recalc_txpower(sdata, update_txp_type);
2200
2201                 return 0;
2202         }
2203
2204         switch (type) {
2205         case NL80211_TX_POWER_AUTOMATIC:
2206                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2207                 txp_type = NL80211_TX_POWER_LIMITED;
2208                 break;
2209         case NL80211_TX_POWER_LIMITED:
2210         case NL80211_TX_POWER_FIXED:
2211                 if (mbm < 0 || (mbm % 100))
2212                         return -EOPNOTSUPP;
2213                 local->user_power_level = MBM_TO_DBM(mbm);
2214                 break;
2215         }
2216
2217         mutex_lock(&local->iflist_mtx);
2218         list_for_each_entry(sdata, &local->interfaces, list) {
2219                 sdata->user_power_level = local->user_power_level;
2220                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2221                         update_txp_type = true;
2222                 sdata->vif.bss_conf.txpower_type = txp_type;
2223         }
2224         list_for_each_entry(sdata, &local->interfaces, list)
2225                 ieee80211_recalc_txpower(sdata, update_txp_type);
2226         mutex_unlock(&local->iflist_mtx);
2227
2228         return 0;
2229 }
2230
2231 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2232                                   struct wireless_dev *wdev,
2233                                   int *dbm)
2234 {
2235         struct ieee80211_local *local = wiphy_priv(wiphy);
2236         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2237
2238         if (local->ops->get_txpower)
2239                 return drv_get_txpower(local, sdata, dbm);
2240
2241         if (!local->use_chanctx)
2242                 *dbm = local->hw.conf.power_level;
2243         else
2244                 *dbm = sdata->vif.bss_conf.txpower;
2245
2246         return 0;
2247 }
2248
2249 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2250                                   const u8 *addr)
2251 {
2252         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2253
2254         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2255
2256         return 0;
2257 }
2258
2259 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2260 {
2261         struct ieee80211_local *local = wiphy_priv(wiphy);
2262
2263         drv_rfkill_poll(local);
2264 }
2265
2266 #ifdef CONFIG_NL80211_TESTMODE
2267 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2268                                   struct wireless_dev *wdev,
2269                                   void *data, int len)
2270 {
2271         struct ieee80211_local *local = wiphy_priv(wiphy);
2272         struct ieee80211_vif *vif = NULL;
2273
2274         if (!local->ops->testmode_cmd)
2275                 return -EOPNOTSUPP;
2276
2277         if (wdev) {
2278                 struct ieee80211_sub_if_data *sdata;
2279
2280                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2281                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2282                         vif = &sdata->vif;
2283         }
2284
2285         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2286 }
2287
2288 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2289                                    struct sk_buff *skb,
2290                                    struct netlink_callback *cb,
2291                                    void *data, int len)
2292 {
2293         struct ieee80211_local *local = wiphy_priv(wiphy);
2294
2295         if (!local->ops->testmode_dump)
2296                 return -EOPNOTSUPP;
2297
2298         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2299 }
2300 #endif
2301
2302 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2303                                 enum ieee80211_smps_mode smps_mode)
2304 {
2305         struct sta_info *sta;
2306         enum ieee80211_smps_mode old_req;
2307
2308         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2309                 return -EINVAL;
2310
2311         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2312                 return 0;
2313
2314         old_req = sdata->u.ap.req_smps;
2315         sdata->u.ap.req_smps = smps_mode;
2316
2317         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2318         if (old_req == smps_mode ||
2319             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2320                 return 0;
2321
2322          /* If no associated stations, there's no need to do anything */
2323         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2324                 sdata->smps_mode = smps_mode;
2325                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2326                 return 0;
2327         }
2328
2329         ht_dbg(sdata,
2330                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2331                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2332
2333         mutex_lock(&sdata->local->sta_mtx);
2334         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2335                 /*
2336                  * Only stations associated to our AP and
2337                  * associated VLANs
2338                  */
2339                 if (sta->sdata->bss != &sdata->u.ap)
2340                         continue;
2341
2342                 /* This station doesn't support MIMO - skip it */
2343                 if (sta_info_tx_streams(sta) == 1)
2344                         continue;
2345
2346                 /*
2347                  * Don't wake up a STA just to send the action frame
2348                  * unless we are getting more restrictive.
2349                  */
2350                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2351                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2352                                                    smps_mode)) {
2353                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2354                                sta->sta.addr);
2355                         continue;
2356                 }
2357
2358                 /*
2359                  * If the STA is not authorized, wait until it gets
2360                  * authorized and the action frame will be sent then.
2361                  */
2362                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2363                         continue;
2364
2365                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2366                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2367                                            sdata->vif.bss_conf.bssid);
2368         }
2369         mutex_unlock(&sdata->local->sta_mtx);
2370
2371         sdata->smps_mode = smps_mode;
2372         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2373
2374         return 0;
2375 }
2376
2377 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2378                                  enum ieee80211_smps_mode smps_mode)
2379 {
2380         const u8 *ap;
2381         enum ieee80211_smps_mode old_req;
2382         int err;
2383         struct sta_info *sta;
2384         bool tdls_peer_found = false;
2385
2386         lockdep_assert_held(&sdata->wdev.mtx);
2387
2388         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2389                 return -EINVAL;
2390
2391         old_req = sdata->u.mgd.req_smps;
2392         sdata->u.mgd.req_smps = smps_mode;
2393
2394         if (old_req == smps_mode &&
2395             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2396                 return 0;
2397
2398         /*
2399          * If not associated, or current association is not an HT
2400          * association, there's no need to do anything, just store
2401          * the new value until we associate.
2402          */
2403         if (!sdata->u.mgd.associated ||
2404             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2405                 return 0;
2406
2407         ap = sdata->u.mgd.associated->bssid;
2408
2409         rcu_read_lock();
2410         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2411                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2412                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2413                         continue;
2414
2415                 tdls_peer_found = true;
2416                 break;
2417         }
2418         rcu_read_unlock();
2419
2420         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2421                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2422                         smps_mode = IEEE80211_SMPS_OFF;
2423                 else
2424                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2425         }
2426
2427         /* send SM PS frame to AP */
2428         err = ieee80211_send_smps_action(sdata, smps_mode,
2429                                          ap, ap);
2430         if (err)
2431                 sdata->u.mgd.req_smps = old_req;
2432         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2433                 ieee80211_teardown_tdls_peers(sdata);
2434
2435         return err;
2436 }
2437
2438 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2439                                     bool enabled, int timeout)
2440 {
2441         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2442         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2443
2444         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2445                 return -EOPNOTSUPP;
2446
2447         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2448                 return -EOPNOTSUPP;
2449
2450         if (enabled == sdata->u.mgd.powersave &&
2451             timeout == local->dynamic_ps_forced_timeout)
2452                 return 0;
2453
2454         sdata->u.mgd.powersave = enabled;
2455         local->dynamic_ps_forced_timeout = timeout;
2456
2457         /* no change, but if automatic follow powersave */
2458         sdata_lock(sdata);
2459         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2460         sdata_unlock(sdata);
2461
2462         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2463                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2464
2465         ieee80211_recalc_ps(local, -1);
2466         ieee80211_recalc_ps_vif(sdata);
2467
2468         return 0;
2469 }
2470
2471 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2472                                          struct net_device *dev,
2473                                          s32 rssi_thold, u32 rssi_hyst)
2474 {
2475         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2476         struct ieee80211_vif *vif = &sdata->vif;
2477         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2478
2479         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2480             rssi_hyst == bss_conf->cqm_rssi_hyst)
2481                 return 0;
2482
2483         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2484             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2485                 return -EOPNOTSUPP;
2486
2487         bss_conf->cqm_rssi_thold = rssi_thold;
2488         bss_conf->cqm_rssi_hyst = rssi_hyst;
2489         sdata->u.mgd.last_cqm_event_signal = 0;
2490
2491         /* tell the driver upon association, unless already associated */
2492         if (sdata->u.mgd.associated &&
2493             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2494                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2495
2496         return 0;
2497 }
2498
2499 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2500                                       struct net_device *dev,
2501                                       const u8 *addr,
2502                                       const struct cfg80211_bitrate_mask *mask)
2503 {
2504         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2505         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2506         int i, ret;
2507
2508         if (!ieee80211_sdata_running(sdata))
2509                 return -ENETDOWN;
2510
2511         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2512                 ret = drv_set_bitrate_mask(local, sdata, mask);
2513                 if (ret)
2514                         return ret;
2515         }
2516
2517         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2518                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2519                 int j;
2520
2521                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2522                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2523                        sizeof(mask->control[i].ht_mcs));
2524                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2525                        mask->control[i].vht_mcs,
2526                        sizeof(mask->control[i].vht_mcs));
2527
2528                 sdata->rc_has_mcs_mask[i] = false;
2529                 sdata->rc_has_vht_mcs_mask[i] = false;
2530                 if (!sband)
2531                         continue;
2532
2533                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2534                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2535                                 sdata->rc_has_mcs_mask[i] = true;
2536                                 break;
2537                         }
2538                 }
2539
2540                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2541                         if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
2542                                 sdata->rc_has_vht_mcs_mask[i] = true;
2543                                 break;
2544                         }
2545                 }
2546         }
2547
2548         return 0;
2549 }
2550
2551 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2552                                            struct ieee80211_roc_work *new_roc,
2553                                            struct ieee80211_roc_work *cur_roc)
2554 {
2555         unsigned long now = jiffies;
2556         unsigned long remaining = cur_roc->hw_start_time +
2557                                   msecs_to_jiffies(cur_roc->duration) -
2558                                   now;
2559
2560         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2561                 return false;
2562
2563         /* if it doesn't fit entirely, schedule a new one */
2564         if (new_roc->duration > jiffies_to_msecs(remaining))
2565                 return false;
2566
2567         ieee80211_handle_roc_started(new_roc);
2568
2569         /* add to dependents so we send the expired event properly */
2570         list_add_tail(&new_roc->list, &cur_roc->dependents);
2571         return true;
2572 }
2573
2574 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2575 {
2576         lockdep_assert_held(&local->mtx);
2577
2578         local->roc_cookie_counter++;
2579
2580         /* wow, you wrapped 64 bits ... more likely a bug */
2581         if (WARN_ON(local->roc_cookie_counter == 0))
2582                 local->roc_cookie_counter++;
2583
2584         return local->roc_cookie_counter;
2585 }
2586
2587 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2588                                     struct ieee80211_sub_if_data *sdata,
2589                                     struct ieee80211_channel *channel,
2590                                     unsigned int duration, u64 *cookie,
2591                                     struct sk_buff *txskb,
2592                                     enum ieee80211_roc_type type)
2593 {
2594         struct ieee80211_roc_work *roc, *tmp;
2595         bool queued = false;
2596         int ret;
2597
2598         lockdep_assert_held(&local->mtx);
2599
2600         if (local->use_chanctx && !local->ops->remain_on_channel)
2601                 return -EOPNOTSUPP;
2602
2603         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2604         if (!roc)
2605                 return -ENOMEM;
2606
2607         /*
2608          * If the duration is zero, then the driver
2609          * wouldn't actually do anything. Set it to
2610          * 10 for now.
2611          *
2612          * TODO: cancel the off-channel operation
2613          *       when we get the SKB's TX status and
2614          *       the wait time was zero before.
2615          */
2616         if (!duration)
2617                 duration = 10;
2618
2619         roc->chan = channel;
2620         roc->duration = duration;
2621         roc->req_duration = duration;
2622         roc->frame = txskb;
2623         roc->type = type;
2624         roc->sdata = sdata;
2625         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2626         INIT_LIST_HEAD(&roc->dependents);
2627
2628         /*
2629          * cookie is either the roc cookie (for normal roc)
2630          * or the SKB (for mgmt TX)
2631          */
2632         if (!txskb) {
2633                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2634                 *cookie = roc->cookie;
2635         } else {
2636                 roc->mgmt_tx_cookie = *cookie;
2637         }
2638
2639         /* if there's one pending or we're scanning, queue this one */
2640         if (!list_empty(&local->roc_list) ||
2641             local->scanning || ieee80211_is_radar_required(local))
2642                 goto out_check_combine;
2643
2644         /* if not HW assist, just queue & schedule work */
2645         if (!local->ops->remain_on_channel) {
2646                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2647                 goto out_queue;
2648         }
2649
2650         /* otherwise actually kick it off here (for error handling) */
2651
2652         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2653         if (ret) {
2654                 kfree(roc);
2655                 return ret;
2656         }
2657
2658         roc->started = true;
2659         goto out_queue;
2660
2661  out_check_combine:
2662         list_for_each_entry(tmp, &local->roc_list, list) {
2663                 if (tmp->chan != channel || tmp->sdata != sdata)
2664                         continue;
2665
2666                 /*
2667                  * Extend this ROC if possible:
2668                  *
2669                  * If it hasn't started yet, just increase the duration
2670                  * and add the new one to the list of dependents.
2671                  * If the type of the new ROC has higher priority, modify the
2672                  * type of the previous one to match that of the new one.
2673                  */
2674                 if (!tmp->started) {
2675                         list_add_tail(&roc->list, &tmp->dependents);
2676                         tmp->duration = max(tmp->duration, roc->duration);
2677                         tmp->type = max(tmp->type, roc->type);
2678                         queued = true;
2679                         break;
2680                 }
2681
2682                 /* If it has already started, it's more difficult ... */
2683                 if (local->ops->remain_on_channel) {
2684                         /*
2685                          * In the offloaded ROC case, if it hasn't begun, add
2686                          * this new one to the dependent list to be handled
2687                          * when the master one begins. If it has begun,
2688                          * check if it fits entirely within the existing one,
2689                          * in which case it will just be dependent as well.
2690                          * Otherwise, schedule it by itself.
2691                          */
2692                         if (!tmp->hw_begun) {
2693                                 list_add_tail(&roc->list, &tmp->dependents);
2694                                 queued = true;
2695                                 break;
2696                         }
2697
2698                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2699                                 queued = true;
2700                 } else if (del_timer_sync(&tmp->work.timer)) {
2701                         unsigned long new_end;
2702
2703                         /*
2704                          * In the software ROC case, cancel the timer, if
2705                          * that fails then the finish work is already
2706                          * queued/pending and thus we queue the new ROC
2707                          * normally, if that succeeds then we can extend
2708                          * the timer duration and TX the frame (if any.)
2709                          */
2710
2711                         list_add_tail(&roc->list, &tmp->dependents);
2712                         queued = true;
2713
2714                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2715
2716                         /* ok, it was started & we canceled timer */
2717                         if (time_after(new_end, tmp->work.timer.expires))
2718                                 mod_timer(&tmp->work.timer, new_end);
2719                         else
2720                                 add_timer(&tmp->work.timer);
2721
2722                         ieee80211_handle_roc_started(roc);
2723                 }
2724                 break;
2725         }
2726
2727  out_queue:
2728         if (!queued)
2729                 list_add_tail(&roc->list, &local->roc_list);
2730
2731         return 0;
2732 }
2733
2734 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2735                                        struct wireless_dev *wdev,
2736                                        struct ieee80211_channel *chan,
2737                                        unsigned int duration,
2738                                        u64 *cookie)
2739 {
2740         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2741         struct ieee80211_local *local = sdata->local;
2742         int ret;
2743
2744         mutex_lock(&local->mtx);
2745         ret = ieee80211_start_roc_work(local, sdata, chan,
2746                                        duration, cookie, NULL,
2747                                        IEEE80211_ROC_TYPE_NORMAL);
2748         mutex_unlock(&local->mtx);
2749
2750         return ret;
2751 }
2752
2753 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2754                                 u64 cookie, bool mgmt_tx)
2755 {
2756         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2757         int ret;
2758
2759         mutex_lock(&local->mtx);
2760         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2761                 struct ieee80211_roc_work *dep, *tmp2;
2762
2763                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2764                         if (!mgmt_tx && dep->cookie != cookie)
2765                                 continue;
2766                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2767                                 continue;
2768                         /* found dependent item -- just remove it */
2769                         list_del(&dep->list);
2770                         mutex_unlock(&local->mtx);
2771
2772                         ieee80211_roc_notify_destroy(dep, true);
2773                         return 0;
2774                 }
2775
2776                 if (!mgmt_tx && roc->cookie != cookie)
2777                         continue;
2778                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2779                         continue;
2780
2781                 found = roc;
2782                 break;
2783         }
2784
2785         if (!found) {
2786                 mutex_unlock(&local->mtx);
2787                 return -ENOENT;
2788         }
2789
2790         /*
2791          * We found the item to cancel, so do that. Note that it
2792          * may have dependents, which we also cancel (and send
2793          * the expired signal for.) Not doing so would be quite
2794          * tricky here, but we may need to fix it later.
2795          */
2796
2797         if (local->ops->remain_on_channel) {
2798                 if (found->started) {
2799                         ret = drv_cancel_remain_on_channel(local);
2800                         if (WARN_ON_ONCE(ret)) {
2801                                 mutex_unlock(&local->mtx);
2802                                 return ret;
2803                         }
2804                 }
2805
2806                 list_del(&found->list);
2807
2808                 if (found->started)
2809                         ieee80211_start_next_roc(local);
2810                 mutex_unlock(&local->mtx);
2811
2812                 ieee80211_roc_notify_destroy(found, true);
2813         } else {
2814                 /* work may be pending so use it all the time */
2815                 found->abort = true;
2816                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2817
2818                 mutex_unlock(&local->mtx);
2819
2820                 /* work will clean up etc */
2821                 flush_delayed_work(&found->work);
2822                 WARN_ON(!found->to_be_freed);
2823                 kfree(found);
2824         }
2825
2826         return 0;
2827 }
2828
2829 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2830                                               struct wireless_dev *wdev,
2831                                               u64 cookie)
2832 {
2833         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2834         struct ieee80211_local *local = sdata->local;
2835
2836         return ieee80211_cancel_roc(local, cookie, false);
2837 }
2838
2839 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2840                                            struct net_device *dev,
2841                                            struct cfg80211_chan_def *chandef,
2842                                            u32 cac_time_ms)
2843 {
2844         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2845         struct ieee80211_local *local = sdata->local;
2846         int err;
2847
2848         mutex_lock(&local->mtx);
2849         if (!list_empty(&local->roc_list) || local->scanning) {
2850                 err = -EBUSY;
2851                 goto out_unlock;
2852         }
2853
2854         /* whatever, but channel contexts should not complain about that one */
2855         sdata->smps_mode = IEEE80211_SMPS_OFF;
2856         sdata->needed_rx_chains = local->rx_chains;
2857
2858         err = ieee80211_vif_use_channel(sdata, chandef,
2859                                         IEEE80211_CHANCTX_SHARED);
2860         if (err)
2861                 goto out_unlock;
2862
2863         ieee80211_queue_delayed_work(&sdata->local->hw,
2864                                      &sdata->dfs_cac_timer_work,
2865                                      msecs_to_jiffies(cac_time_ms));
2866
2867  out_unlock:
2868         mutex_unlock(&local->mtx);
2869         return err;
2870 }
2871
2872 static struct cfg80211_beacon_data *
2873 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2874 {
2875         struct cfg80211_beacon_data *new_beacon;
2876         u8 *pos;
2877         int len;
2878
2879         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2880               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2881               beacon->probe_resp_len;
2882
2883         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2884         if (!new_beacon)
2885                 return NULL;
2886
2887         pos = (u8 *)(new_beacon + 1);
2888         if (beacon->head_len) {
2889                 new_beacon->head_len = beacon->head_len;
2890                 new_beacon->head = pos;
2891                 memcpy(pos, beacon->head, beacon->head_len);
2892                 pos += beacon->head_len;
2893         }
2894         if (beacon->tail_len) {
2895                 new_beacon->tail_len = beacon->tail_len;
2896                 new_beacon->tail = pos;
2897                 memcpy(pos, beacon->tail, beacon->tail_len);
2898                 pos += beacon->tail_len;
2899         }
2900         if (beacon->beacon_ies_len) {
2901                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2902                 new_beacon->beacon_ies = pos;
2903                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2904                 pos += beacon->beacon_ies_len;
2905         }
2906         if (beacon->proberesp_ies_len) {
2907                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2908                 new_beacon->proberesp_ies = pos;
2909                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2910                 pos += beacon->proberesp_ies_len;
2911         }
2912         if (beacon->assocresp_ies_len) {
2913                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2914                 new_beacon->assocresp_ies = pos;
2915                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2916                 pos += beacon->assocresp_ies_len;
2917         }
2918         if (beacon->probe_resp_len) {
2919                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2920                 beacon->probe_resp = pos;
2921                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2922                 pos += beacon->probe_resp_len;
2923         }
2924
2925         return new_beacon;
2926 }
2927
2928 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2929 {
2930         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2931
2932         ieee80211_queue_work(&sdata->local->hw,
2933                              &sdata->csa_finalize_work);
2934 }
2935 EXPORT_SYMBOL(ieee80211_csa_finish);
2936
2937 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2938                                           u32 *changed)
2939 {
2940         int err;
2941
2942         switch (sdata->vif.type) {
2943         case NL80211_IFTYPE_AP:
2944                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2945                                               NULL);
2946                 kfree(sdata->u.ap.next_beacon);
2947                 sdata->u.ap.next_beacon = NULL;
2948
2949                 if (err < 0)
2950                         return err;
2951                 *changed |= err;
2952                 break;
2953         case NL80211_IFTYPE_ADHOC:
2954                 err = ieee80211_ibss_finish_csa(sdata);
2955                 if (err < 0)
2956                         return err;
2957                 *changed |= err;
2958                 break;
2959 #ifdef CONFIG_MAC80211_MESH
2960         case NL80211_IFTYPE_MESH_POINT:
2961                 err = ieee80211_mesh_finish_csa(sdata);
2962                 if (err < 0)
2963                         return err;
2964                 *changed |= err;
2965                 break;
2966 #endif
2967         default:
2968                 WARN_ON(1);
2969                 return -EINVAL;
2970         }
2971
2972         return 0;
2973 }
2974
2975 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2976 {
2977         struct ieee80211_local *local = sdata->local;
2978         u32 changed = 0;
2979         int err;
2980
2981         sdata_assert_lock(sdata);
2982         lockdep_assert_held(&local->mtx);
2983         lockdep_assert_held(&local->chanctx_mtx);
2984
2985         /*
2986          * using reservation isn't immediate as it may be deferred until later
2987          * with multi-vif. once reservation is complete it will re-schedule the
2988          * work with no reserved_chanctx so verify chandef to check if it
2989          * completed successfully
2990          */
2991
2992         if (sdata->reserved_chanctx) {
2993                 /*
2994                  * with multi-vif csa driver may call ieee80211_csa_finish()
2995                  * many times while waiting for other interfaces to use their
2996                  * reservations
2997                  */
2998                 if (sdata->reserved_ready)
2999                         return 0;
3000
3001                 return ieee80211_vif_use_reserved_context(sdata);
3002         }
3003
3004         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
3005                                         &sdata->csa_chandef))
3006                 return -EINVAL;
3007
3008         sdata->vif.csa_active = false;
3009
3010         err = ieee80211_set_after_csa_beacon(sdata, &changed);
3011         if (err)
3012                 return err;
3013
3014         ieee80211_bss_info_change_notify(sdata, changed);
3015
3016         if (sdata->csa_block_tx) {
3017                 ieee80211_wake_vif_queues(local, sdata,
3018                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3019                 sdata->csa_block_tx = false;
3020         }
3021
3022         err = drv_post_channel_switch(sdata);
3023         if (err)
3024                 return err;
3025
3026         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
3027
3028         return 0;
3029 }
3030
3031 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
3032 {
3033         if (__ieee80211_csa_finalize(sdata)) {
3034                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
3035                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
3036                                     GFP_KERNEL);
3037         }
3038 }
3039
3040 void ieee80211_csa_finalize_work(struct work_struct *work)
3041 {
3042         struct ieee80211_sub_if_data *sdata =
3043                 container_of(work, struct ieee80211_sub_if_data,
3044                              csa_finalize_work);
3045         struct ieee80211_local *local = sdata->local;
3046
3047         sdata_lock(sdata);
3048         mutex_lock(&local->mtx);
3049         mutex_lock(&local->chanctx_mtx);
3050
3051         /* AP might have been stopped while waiting for the lock. */
3052         if (!sdata->vif.csa_active)
3053                 goto unlock;
3054
3055         if (!ieee80211_sdata_running(sdata))
3056                 goto unlock;
3057
3058         ieee80211_csa_finalize(sdata);
3059
3060 unlock:
3061         mutex_unlock(&local->chanctx_mtx);
3062         mutex_unlock(&local->mtx);
3063         sdata_unlock(sdata);
3064 }
3065
3066 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3067                                     struct cfg80211_csa_settings *params,
3068                                     u32 *changed)
3069 {
3070         struct ieee80211_csa_settings csa = {};
3071         int err;
3072
3073         switch (sdata->vif.type) {
3074         case NL80211_IFTYPE_AP:
3075                 sdata->u.ap.next_beacon =
3076                         cfg80211_beacon_dup(&params->beacon_after);
3077                 if (!sdata->u.ap.next_beacon)
3078                         return -ENOMEM;
3079
3080                 /*
3081                  * With a count of 0, we don't have to wait for any
3082                  * TBTT before switching, so complete the CSA
3083                  * immediately.  In theory, with a count == 1 we
3084                  * should delay the switch until just before the next
3085                  * TBTT, but that would complicate things so we switch
3086                  * immediately too.  If we would delay the switch
3087                  * until the next TBTT, we would have to set the probe
3088                  * response here.
3089                  *
3090                  * TODO: A channel switch with count <= 1 without
3091                  * sending a CSA action frame is kind of useless,
3092                  * because the clients won't know we're changing
3093                  * channels.  The action frame must be implemented
3094                  * either here or in the userspace.
3095                  */
3096                 if (params->count <= 1)
3097                         break;
3098
3099                 if ((params->n_counter_offsets_beacon >
3100                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3101                     (params->n_counter_offsets_presp >
3102                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3103                         return -EINVAL;
3104
3105                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3106                 csa.counter_offsets_presp = params->counter_offsets_presp;
3107                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3108                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3109                 csa.count = params->count;
3110
3111                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3112                 if (err < 0) {
3113                         kfree(sdata->u.ap.next_beacon);
3114                         return err;
3115                 }
3116                 *changed |= err;
3117
3118                 break;
3119         case NL80211_IFTYPE_ADHOC:
3120                 if (!sdata->vif.bss_conf.ibss_joined)
3121                         return -EINVAL;
3122
3123                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3124                         return -EINVAL;
3125
3126                 switch (params->chandef.width) {
3127                 case NL80211_CHAN_WIDTH_40:
3128                         if (cfg80211_get_chandef_type(&params->chandef) !=
3129                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3130                                 return -EINVAL;
3131                 case NL80211_CHAN_WIDTH_5:
3132                 case NL80211_CHAN_WIDTH_10:
3133                 case NL80211_CHAN_WIDTH_20_NOHT:
3134                 case NL80211_CHAN_WIDTH_20:
3135                         break;
3136                 default:
3137                         return -EINVAL;
3138                 }
3139
3140                 /* changes into another band are not supported */
3141                 if (sdata->u.ibss.chandef.chan->band !=
3142                     params->chandef.chan->band)
3143                         return -EINVAL;
3144
3145                 /* see comments in the NL80211_IFTYPE_AP block */
3146                 if (params->count > 1) {
3147                         err = ieee80211_ibss_csa_beacon(sdata, params);
3148                         if (err < 0)
3149                                 return err;
3150                         *changed |= err;
3151                 }
3152
3153                 ieee80211_send_action_csa(sdata, params);
3154
3155                 break;
3156 #ifdef CONFIG_MAC80211_MESH
3157         case NL80211_IFTYPE_MESH_POINT: {
3158                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3159
3160                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3161                         return -EINVAL;
3162
3163                 /* changes into another band are not supported */
3164                 if (sdata->vif.bss_conf.chandef.chan->band !=
3165                     params->chandef.chan->band)
3166                         return -EINVAL;
3167
3168                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3169                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3170                         if (!ifmsh->pre_value)
3171                                 ifmsh->pre_value = 1;
3172                         else
3173                                 ifmsh->pre_value++;
3174                 }
3175
3176                 /* see comments in the NL80211_IFTYPE_AP block */
3177                 if (params->count > 1) {
3178                         err = ieee80211_mesh_csa_beacon(sdata, params);
3179                         if (err < 0) {
3180                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3181                                 return err;
3182                         }
3183                         *changed |= err;
3184                 }
3185
3186                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3187                         ieee80211_send_action_csa(sdata, params);
3188
3189                 break;
3190                 }
3191 #endif
3192         default:
3193                 return -EOPNOTSUPP;
3194         }
3195
3196         return 0;
3197 }
3198
3199 static int
3200 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3201                            struct cfg80211_csa_settings *params)
3202 {
3203         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3204         struct ieee80211_local *local = sdata->local;
3205         struct ieee80211_channel_switch ch_switch;
3206         struct ieee80211_chanctx_conf *conf;
3207         struct ieee80211_chanctx *chanctx;
3208         u32 changed = 0;
3209         int err;
3210
3211         sdata_assert_lock(sdata);
3212         lockdep_assert_held(&local->mtx);
3213
3214         if (!list_empty(&local->roc_list) || local->scanning)
3215                 return -EBUSY;
3216
3217         if (sdata->wdev.cac_started)
3218                 return -EBUSY;
3219
3220         if (cfg80211_chandef_identical(&params->chandef,
3221                                        &sdata->vif.bss_conf.chandef))
3222                 return -EINVAL;
3223
3224         /* don't allow another channel switch if one is already active. */
3225         if (sdata->vif.csa_active)
3226                 return -EBUSY;
3227
3228         mutex_lock(&local->chanctx_mtx);
3229         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3230                                          lockdep_is_held(&local->chanctx_mtx));
3231         if (!conf) {
3232                 err = -EBUSY;
3233                 goto out;
3234         }
3235
3236         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3237         if (!chanctx) {
3238                 err = -EBUSY;
3239                 goto out;
3240         }
3241
3242         ch_switch.timestamp = 0;
3243         ch_switch.device_timestamp = 0;
3244         ch_switch.block_tx = params->block_tx;
3245         ch_switch.chandef = params->chandef;
3246         ch_switch.count = params->count;
3247
3248         err = drv_pre_channel_switch(sdata, &ch_switch);
3249         if (err)
3250                 goto out;
3251
3252         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3253                                             chanctx->mode,
3254                                             params->radar_required);
3255         if (err)
3256                 goto out;
3257
3258         /* if reservation is invalid then this will fail */
3259         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3260         if (err) {
3261                 ieee80211_vif_unreserve_chanctx(sdata);
3262                 goto out;
3263         }
3264
3265         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3266         if (err) {
3267                 ieee80211_vif_unreserve_chanctx(sdata);
3268                 goto out;
3269         }
3270
3271         sdata->csa_chandef = params->chandef;
3272         sdata->csa_block_tx = params->block_tx;
3273         sdata->vif.csa_active = true;
3274
3275         if (sdata->csa_block_tx)
3276                 ieee80211_stop_vif_queues(local, sdata,
3277                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3278
3279         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3280                                           params->count);
3281
3282         if (changed) {
3283                 ieee80211_bss_info_change_notify(sdata, changed);
3284                 drv_channel_switch_beacon(sdata, &params->chandef);
3285         } else {
3286                 /* if the beacon didn't change, we can finalize immediately */
3287                 ieee80211_csa_finalize(sdata);
3288         }
3289
3290 out:
3291         mutex_unlock(&local->chanctx_mtx);
3292         return err;
3293 }
3294
3295 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3296                              struct cfg80211_csa_settings *params)
3297 {
3298         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3299         struct ieee80211_local *local = sdata->local;
3300         int err;
3301
3302         mutex_lock(&local->mtx);
3303         err = __ieee80211_channel_switch(wiphy, dev, params);
3304         mutex_unlock(&local->mtx);
3305
3306         return err;
3307 }
3308
3309 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3310                                               struct sk_buff *skb, u64 *cookie,
3311                                               gfp_t gfp)
3312 {
3313         unsigned long spin_flags;
3314         struct sk_buff *ack_skb;
3315         int id;
3316
3317         ack_skb = skb_copy(skb, gfp);
3318         if (!ack_skb)
3319                 return ERR_PTR(-ENOMEM);
3320
3321         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3322         id = idr_alloc(&local->ack_status_frames, ack_skb,
3323                        1, 0x10000, GFP_ATOMIC);
3324         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3325
3326         if (id < 0) {
3327                 kfree_skb(ack_skb);
3328                 return ERR_PTR(-ENOMEM);
3329         }
3330
3331         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3332
3333         *cookie = ieee80211_mgmt_tx_cookie(local);
3334         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3335
3336         return ack_skb;
3337 }
3338
3339 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3340                              struct cfg80211_mgmt_tx_params *params,
3341                              u64 *cookie)
3342 {
3343         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3344         struct ieee80211_local *local = sdata->local;
3345         struct sk_buff *skb, *ack_skb;
3346         struct sta_info *sta;
3347         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3348         bool need_offchan = false;
3349         u32 flags;
3350         int ret;
3351         u8 *data;
3352
3353         if (params->dont_wait_for_ack)
3354                 flags = IEEE80211_TX_CTL_NO_ACK;
3355         else
3356                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3357                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3358
3359         if (params->no_cck)
3360                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3361
3362         switch (sdata->vif.type) {
3363         case NL80211_IFTYPE_ADHOC:
3364                 if (!sdata->vif.bss_conf.ibss_joined)
3365                         need_offchan = true;
3366                 /* fall through */
3367 #ifdef CONFIG_MAC80211_MESH
3368         case NL80211_IFTYPE_MESH_POINT:
3369                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3370                     !sdata->u.mesh.mesh_id_len)
3371                         need_offchan = true;
3372                 /* fall through */
3373 #endif
3374         case NL80211_IFTYPE_AP:
3375         case NL80211_IFTYPE_AP_VLAN:
3376         case NL80211_IFTYPE_P2P_GO:
3377                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3378                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3379                     !rcu_access_pointer(sdata->bss->beacon))
3380                         need_offchan = true;
3381                 if (!ieee80211_is_action(mgmt->frame_control) ||
3382                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3383                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3384                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3385                         break;
3386                 rcu_read_lock();
3387                 sta = sta_info_get(sdata, mgmt->da);
3388                 rcu_read_unlock();
3389                 if (!sta)
3390                         return -ENOLINK;
3391                 break;
3392         case NL80211_IFTYPE_STATION:
3393         case NL80211_IFTYPE_P2P_CLIENT:
3394                 sdata_lock(sdata);
3395                 if (!sdata->u.mgd.associated ||
3396                     (params->offchan && params->wait &&
3397                      local->ops->remain_on_channel &&
3398                      memcmp(sdata->u.mgd.associated->bssid,
3399                             mgmt->bssid, ETH_ALEN)))
3400                         need_offchan = true;
3401                 sdata_unlock(sdata);
3402                 break;
3403         case NL80211_IFTYPE_P2P_DEVICE:
3404                 need_offchan = true;
3405                 break;
3406         default:
3407                 return -EOPNOTSUPP;
3408         }
3409
3410         /* configurations requiring offchan cannot work if no channel has been
3411          * specified
3412          */
3413         if (need_offchan && !params->chan)
3414                 return -EINVAL;
3415
3416         mutex_lock(&local->mtx);
3417
3418         /* Check if the operating channel is the requested channel */
3419         if (!need_offchan) {
3420                 struct ieee80211_chanctx_conf *chanctx_conf;
3421
3422                 rcu_read_lock();
3423                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3424
3425                 if (chanctx_conf) {
3426                         need_offchan = params->chan &&
3427                                        (params->chan !=
3428                                         chanctx_conf->def.chan);
3429                 } else if (!params->chan) {
3430                         ret = -EINVAL;
3431                         rcu_read_unlock();
3432                         goto out_unlock;
3433                 } else {
3434                         need_offchan = true;
3435                 }
3436                 rcu_read_unlock();
3437         }
3438
3439         if (need_offchan && !params->offchan) {
3440                 ret = -EBUSY;
3441                 goto out_unlock;
3442         }
3443
3444         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3445         if (!skb) {
3446                 ret = -ENOMEM;
3447                 goto out_unlock;
3448         }
3449         skb_reserve(skb, local->hw.extra_tx_headroom);
3450
3451         data = skb_put(skb, params->len);
3452         memcpy(data, params->buf, params->len);
3453
3454         /* Update CSA counters */
3455         if (sdata->vif.csa_active &&
3456             (sdata->vif.type == NL80211_IFTYPE_AP ||
3457              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3458              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3459             params->n_csa_offsets) {
3460                 int i;
3461                 struct beacon_data *beacon = NULL;
3462
3463                 rcu_read_lock();
3464
3465                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3466                         beacon = rcu_dereference(sdata->u.ap.beacon);
3467                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3468                         beacon = rcu_dereference(sdata->u.ibss.presp);
3469                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3470                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3471
3472                 if (beacon)
3473                         for (i = 0; i < params->n_csa_offsets; i++)
3474                                 data[params->csa_offsets[i]] =
3475                                         beacon->csa_current_counter;
3476
3477                 rcu_read_unlock();
3478         }
3479
3480         IEEE80211_SKB_CB(skb)->flags = flags;
3481
3482         skb->dev = sdata->dev;
3483
3484         if (!params->dont_wait_for_ack) {
3485                 /* make a copy to preserve the frame contents
3486                  * in case of encryption.
3487                  */
3488                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3489                                                  GFP_KERNEL);
3490                 if (IS_ERR(ack_skb)) {
3491                         ret = PTR_ERR(ack_skb);
3492                         kfree_skb(skb);
3493                         goto out_unlock;
3494                 }
3495         } else {
3496                 /* for cookie below */
3497                 ack_skb = skb;
3498         }
3499
3500         if (!need_offchan) {
3501                 ieee80211_tx_skb(sdata, skb);
3502                 ret = 0;
3503                 goto out_unlock;
3504         }
3505
3506         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3507                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3508         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3509                 IEEE80211_SKB_CB(skb)->hw_queue =
3510                         local->hw.offchannel_tx_hw_queue;
3511
3512         /* This will handle all kinds of coalescing and immediate TX */
3513         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3514                                        params->wait, cookie, skb,
3515                                        IEEE80211_ROC_TYPE_MGMT_TX);
3516         if (ret)
3517                 kfree_skb(skb);
3518  out_unlock:
3519         mutex_unlock(&local->mtx);
3520         return ret;
3521 }
3522
3523 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3524                                          struct wireless_dev *wdev,
3525                                          u64 cookie)
3526 {
3527         struct ieee80211_local *local = wiphy_priv(wiphy);
3528
3529         return ieee80211_cancel_roc(local, cookie, true);
3530 }
3531
3532 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3533                                           struct wireless_dev *wdev,
3534                                           u16 frame_type, bool reg)
3535 {
3536         struct ieee80211_local *local = wiphy_priv(wiphy);
3537         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3538
3539         switch (frame_type) {
3540         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3541                 if (reg) {
3542                         local->probe_req_reg++;
3543                         sdata->vif.probe_req_reg++;
3544                 } else {
3545                         if (local->probe_req_reg)
3546                                 local->probe_req_reg--;
3547
3548                         if (sdata->vif.probe_req_reg)
3549                                 sdata->vif.probe_req_reg--;
3550                 }
3551
3552                 if (!local->open_count)
3553                         break;
3554
3555                 if (sdata->vif.probe_req_reg == 1)
3556                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3557                                                 FIF_PROBE_REQ);
3558                 else if (sdata->vif.probe_req_reg == 0)
3559                         drv_config_iface_filter(local, sdata, 0,
3560                                                 FIF_PROBE_REQ);
3561
3562                 ieee80211_configure_filter(local);
3563                 break;
3564         default:
3565                 break;
3566         }
3567 }
3568
3569 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3570 {
3571         struct ieee80211_local *local = wiphy_priv(wiphy);
3572
3573         if (local->started)
3574                 return -EOPNOTSUPP;
3575
3576         return drv_set_antenna(local, tx_ant, rx_ant);
3577 }
3578
3579 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3580 {
3581         struct ieee80211_local *local = wiphy_priv(wiphy);
3582
3583         return drv_get_antenna(local, tx_ant, rx_ant);
3584 }
3585
3586 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3587                                     struct net_device *dev,
3588                                     struct cfg80211_gtk_rekey_data *data)
3589 {
3590         struct ieee80211_local *local = wiphy_priv(wiphy);
3591         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3592
3593         if (!local->ops->set_rekey_data)
3594                 return -EOPNOTSUPP;
3595
3596         drv_set_rekey_data(local, sdata, data);
3597
3598         return 0;
3599 }
3600
3601 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3602                                   const u8 *peer, u64 *cookie)
3603 {
3604         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3605         struct ieee80211_local *local = sdata->local;
3606         struct ieee80211_qos_hdr *nullfunc;
3607         struct sk_buff *skb, *ack_skb;
3608         int size = sizeof(*nullfunc);
3609         __le16 fc;
3610         bool qos;
3611         struct ieee80211_tx_info *info;
3612         struct sta_info *sta;
3613         struct ieee80211_chanctx_conf *chanctx_conf;
3614         enum ieee80211_band band;
3615         int ret;
3616
3617         /* the lock is needed to assign the cookie later */
3618         mutex_lock(&local->mtx);
3619
3620         rcu_read_lock();
3621         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3622         if (WARN_ON(!chanctx_conf)) {
3623                 ret = -EINVAL;
3624                 goto unlock;
3625         }
3626         band = chanctx_conf->def.chan->band;
3627         sta = sta_info_get_bss(sdata, peer);
3628         if (sta) {
3629                 qos = sta->sta.wme;
3630         } else {
3631                 ret = -ENOLINK;
3632                 goto unlock;
3633         }
3634
3635         if (qos) {
3636                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3637                                  IEEE80211_STYPE_QOS_NULLFUNC |
3638                                  IEEE80211_FCTL_FROMDS);
3639         } else {
3640                 size -= 2;
3641                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3642                                  IEEE80211_STYPE_NULLFUNC |
3643                                  IEEE80211_FCTL_FROMDS);
3644         }
3645
3646         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3647         if (!skb) {
3648                 ret = -ENOMEM;
3649                 goto unlock;
3650         }
3651
3652         skb->dev = dev;
3653
3654         skb_reserve(skb, local->hw.extra_tx_headroom);
3655
3656         nullfunc = (void *) skb_put(skb, size);
3657         nullfunc->frame_control = fc;
3658         nullfunc->duration_id = 0;
3659         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3660         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3661         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3662         nullfunc->seq_ctrl = 0;
3663
3664         info = IEEE80211_SKB_CB(skb);
3665
3666         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3667                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3668         info->band = band;
3669
3670         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3671         skb->priority = 7;
3672         if (qos)
3673                 nullfunc->qos_ctrl = cpu_to_le16(7);
3674
3675         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3676         if (IS_ERR(ack_skb)) {
3677                 kfree_skb(skb);
3678                 ret = PTR_ERR(ack_skb);
3679                 goto unlock;
3680         }
3681
3682         local_bh_disable();
3683         ieee80211_xmit(sdata, sta, skb);
3684         local_bh_enable();
3685
3686         ret = 0;
3687 unlock:
3688         rcu_read_unlock();
3689         mutex_unlock(&local->mtx);
3690
3691         return ret;
3692 }
3693
3694 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3695                                      struct wireless_dev *wdev,
3696                                      struct cfg80211_chan_def *chandef)
3697 {
3698         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3699         struct ieee80211_local *local = wiphy_priv(wiphy);
3700         struct ieee80211_chanctx_conf *chanctx_conf;
3701         int ret = -ENODATA;
3702
3703         rcu_read_lock();
3704         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3705         if (chanctx_conf) {
3706                 *chandef = sdata->vif.bss_conf.chandef;
3707                 ret = 0;
3708         } else if (local->open_count > 0 &&
3709                    local->open_count == local->monitors &&
3710                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3711                 if (local->use_chanctx)
3712                         *chandef = local->monitor_chandef;
3713                 else
3714                         *chandef = local->_oper_chandef;
3715                 ret = 0;
3716         }
3717         rcu_read_unlock();
3718
3719         return ret;
3720 }
3721
3722 #ifdef CONFIG_PM
3723 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3724 {
3725         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3726 }
3727 #endif
3728
3729 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3730                                  struct net_device *dev,
3731                                  struct cfg80211_qos_map *qos_map)
3732 {
3733         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3734         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3735
3736         if (qos_map) {
3737                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3738                 if (!new_qos_map)
3739                         return -ENOMEM;
3740                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3741         } else {
3742                 /* A NULL qos_map was passed to disable QoS mapping */
3743                 new_qos_map = NULL;
3744         }
3745
3746         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3747         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3748         if (old_qos_map)
3749                 kfree_rcu(old_qos_map, rcu_head);
3750
3751         return 0;
3752 }
3753
3754 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3755                                       struct net_device *dev,
3756                                       struct cfg80211_chan_def *chandef)
3757 {
3758         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3759         int ret;
3760         u32 changed = 0;
3761
3762         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3763         if (ret == 0)
3764                 ieee80211_bss_info_change_notify(sdata, changed);
3765
3766         return ret;
3767 }
3768
3769 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3770                                u8 tsid, const u8 *peer, u8 up,
3771                                u16 admitted_time)
3772 {
3773         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3774         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3775         int ac = ieee802_1d_to_ac[up];
3776
3777         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3778                 return -EOPNOTSUPP;
3779
3780         if (!(sdata->wmm_acm & BIT(up)))
3781                 return -EINVAL;
3782
3783         if (ifmgd->tx_tspec[ac].admitted_time)
3784                 return -EBUSY;
3785
3786         if (admitted_time) {
3787                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3788                 ifmgd->tx_tspec[ac].tsid = tsid;
3789                 ifmgd->tx_tspec[ac].up = up;
3790         }
3791
3792         return 0;
3793 }
3794
3795 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3796                                u8 tsid, const u8 *peer)
3797 {
3798         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3799         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3800         struct ieee80211_local *local = wiphy_priv(wiphy);
3801         int ac;
3802
3803         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3804                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3805
3806                 /* skip unused entries */
3807                 if (!tx_tspec->admitted_time)
3808                         continue;
3809
3810                 if (tx_tspec->tsid != tsid)
3811                         continue;
3812
3813                 /* due to this new packets will be reassigned to non-ACM ACs */
3814                 tx_tspec->up = -1;
3815
3816                 /* Make sure that all packets have been sent to avoid to
3817                  * restore the QoS params on packets that are still on the
3818                  * queues.
3819                  */
3820                 synchronize_net();
3821                 ieee80211_flush_queues(local, sdata, false);
3822
3823                 /* restore the normal QoS parameters
3824                  * (unconditionally to avoid races)
3825                  */
3826                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3827                 tx_tspec->downgraded = false;
3828                 ieee80211_sta_handle_tspec_ac_params(sdata);
3829
3830                 /* finally clear all the data */
3831                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3832
3833                 return 0;
3834         }
3835
3836         return -ENOENT;
3837 }
3838
3839 const struct cfg80211_ops mac80211_config_ops = {
3840         .add_virtual_intf = ieee80211_add_iface,
3841         .del_virtual_intf = ieee80211_del_iface,
3842         .change_virtual_intf = ieee80211_change_iface,
3843         .start_p2p_device = ieee80211_start_p2p_device,
3844         .stop_p2p_device = ieee80211_stop_p2p_device,
3845         .add_key = ieee80211_add_key,
3846         .del_key = ieee80211_del_key,
3847         .get_key = ieee80211_get_key,
3848         .set_default_key = ieee80211_config_default_key,
3849         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3850         .start_ap = ieee80211_start_ap,
3851         .change_beacon = ieee80211_change_beacon,
3852         .stop_ap = ieee80211_stop_ap,
3853         .add_station = ieee80211_add_station,
3854         .del_station = ieee80211_del_station,
3855         .change_station = ieee80211_change_station,
3856         .get_station = ieee80211_get_station,
3857         .dump_station = ieee80211_dump_station,
3858         .dump_survey = ieee80211_dump_survey,
3859 #ifdef CONFIG_MAC80211_MESH
3860         .add_mpath = ieee80211_add_mpath,
3861         .del_mpath = ieee80211_del_mpath,
3862         .change_mpath = ieee80211_change_mpath,
3863         .get_mpath = ieee80211_get_mpath,
3864         .dump_mpath = ieee80211_dump_mpath,
3865         .get_mpp = ieee80211_get_mpp,
3866         .dump_mpp = ieee80211_dump_mpp,
3867         .update_mesh_config = ieee80211_update_mesh_config,
3868         .get_mesh_config = ieee80211_get_mesh_config,
3869         .join_mesh = ieee80211_join_mesh,
3870         .leave_mesh = ieee80211_leave_mesh,
3871 #endif
3872         .join_ocb = ieee80211_join_ocb,
3873         .leave_ocb = ieee80211_leave_ocb,
3874         .change_bss = ieee80211_change_bss,
3875         .set_txq_params = ieee80211_set_txq_params,
3876         .set_monitor_channel = ieee80211_set_monitor_channel,
3877         .suspend = ieee80211_suspend,
3878         .resume = ieee80211_resume,
3879         .scan = ieee80211_scan,
3880         .sched_scan_start = ieee80211_sched_scan_start,
3881         .sched_scan_stop = ieee80211_sched_scan_stop,
3882         .auth = ieee80211_auth,
3883         .assoc = ieee80211_assoc,
3884         .deauth = ieee80211_deauth,
3885         .disassoc = ieee80211_disassoc,
3886         .join_ibss = ieee80211_join_ibss,
3887         .leave_ibss = ieee80211_leave_ibss,
3888         .set_mcast_rate = ieee80211_set_mcast_rate,
3889         .set_wiphy_params = ieee80211_set_wiphy_params,
3890         .set_tx_power = ieee80211_set_tx_power,
3891         .get_tx_power = ieee80211_get_tx_power,
3892         .set_wds_peer = ieee80211_set_wds_peer,
3893         .rfkill_poll = ieee80211_rfkill_poll,
3894         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3895         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3896         .set_power_mgmt = ieee80211_set_power_mgmt,
3897         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3898         .remain_on_channel = ieee80211_remain_on_channel,
3899         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3900         .mgmt_tx = ieee80211_mgmt_tx,
3901         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3902         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3903         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3904         .set_antenna = ieee80211_set_antenna,
3905         .get_antenna = ieee80211_get_antenna,
3906         .set_rekey_data = ieee80211_set_rekey_data,
3907         .tdls_oper = ieee80211_tdls_oper,
3908         .tdls_mgmt = ieee80211_tdls_mgmt,
3909         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3910         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3911         .probe_client = ieee80211_probe_client,
3912         .set_noack_map = ieee80211_set_noack_map,
3913 #ifdef CONFIG_PM
3914         .set_wakeup = ieee80211_set_wakeup,
3915 #endif
3916         .get_channel = ieee80211_cfg_get_channel,
3917         .start_radar_detection = ieee80211_start_radar_detection,
3918         .channel_switch = ieee80211_channel_switch,
3919         .set_qos_map = ieee80211_set_qos_map,
3920         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3921         .add_tx_ts = ieee80211_add_tx_ts,
3922         .del_tx_ts = ieee80211_del_tx_ts,
3923 };